阅读说明：本技术 一种压铸机熔杯和压射冲头之间的润滑方法 (Lubricating method between melting cup and injection punch of die casting machine ) 是由 吴奕鑫 吴玉荣 吴建成 王志锋 郑福建 于 2021-07-29 设计创作，主要内容包括：本发明公开了一种压铸机熔杯和压射冲头之间的润滑方法,所述润滑方法包括以下步骤：S11、控制压射冲头位于起始位置,此时全部润滑油槽被压射冲头覆盖住；S12、通过润滑油道向压射冲头增压输送润滑油,润滑油通过压射冲头的外周壁与熔杯的内周壁的间隙溢流至压射冲头的运动前方；S13、往熔杯内倒入金属液；S14、控制压射冲头进行压射动作,将熔杯内的金属液压射出,使得润滑油在压射冲头压射金属液时对熔杯的内周壁和压射冲头的外周壁之间进行润滑；S15、控制压射冲头回到起始位置。本发明润滑效果好,延长了熔杯和压射冲头的使用寿命,且能够减少因润滑油燃烧产生的气体和杂质混入金属液的趋势,提高了压铸件的质量。(The invention discloses a lubricating method between a melting cup and an injection punch of a die casting machine, which comprises the following steps: s11, controlling the injection punch to be at the initial position, wherein all the lubricating oil grooves are covered by the injection punch; s12, pressurizing and conveying lubricating oil to the injection punch through the lubricating oil channel, and overflowing the lubricating oil to the front of the movement of the injection punch through the gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the melting cup; s13, pouring molten metal into the melting cup; s14, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil lubricates the space between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the molten metal; and S15, controlling the shot punch to return to the start position. The invention has good lubricating effect, prolongs the service life of the melting cup and the injection punch, can reduce the tendency that gas and impurities generated by the combustion of lubricating oil are mixed into molten metal, and improves the quality of die castings.)

1. A lubricating method between a melting cup and an injection punch of a die casting machine is characterized in that: the die casting machine comprises an injection device, the injection device comprises a melting cup and an injection punch which are in sliding fit with each other, a lubricating oil channel is arranged on the side wall of the melting cup and comprises a lubricating oil groove located on the inner side wall of the melting cup, an initial position is arranged in the melting cup, and the injection punch covers all the lubricating oil grooves when in the initial position;

the lubricating method comprises the following steps:

s11, controlling the injection punch to be at the initial position, wherein all the lubricating oil grooves are covered by the injection punch;

s12, pressurizing and conveying lubricating oil to the injection punch through a lubricating oil groove of the lubricating oil channel, and overflowing the lubricating oil to the front of the movement of the injection punch through a gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the melting cup;

s13, pouring molten metal into the melting cup;

s14, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil lubricates the space between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the molten metal;

and S15, controlling the shot punch to return to the start position.

2. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 1 wherein: in step S12, the lubricant is adjustably and quantitatively supplied by a lubricant supply system including a controller and an oil delivery pump, the controller controlling the oil delivery pump to deliver the lubricant to the lubricant passageway.

3. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 1 wherein: the lubricating oil channel further comprises an oil inlet channel positioned in the side wall of the melting cup, an inlet of the oil inlet channel is exposed out of the end face of the melting cup, an outlet of the oil inlet channel is communicated with a lubricating oil groove, the lubricating oil groove is annularly distributed on the inner peripheral wall of the melting cup, and the lubricating oil groove is provided with at least two channels which are communicated with each other.

4. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 1 wherein: the injection device is a horizontal injection device or a vertical injection device.

5. A lubricating method between a melting cup and an injection punch of a die casting machine is characterized in that: the die casting machine comprises an injection device, the injection device comprises a melting cup and an injection punch which are in sliding fit with each other, a lubricating oil channel is arranged on the side wall of the melting cup and comprises a lubricating oil groove positioned on the inner side wall of the melting cup, a first starting position, a second starting position and an ending position are sequentially arranged in the melting cup, part of the lubricating oil groove is exposed when the injection punch is at the first starting position, and all the lubricating oil grooves are covered when the injection punch is at the second starting position;

the lubricating method comprises the following steps:

s11, controlling the injection punch to be at a first start position with a part of the lubricating oil groove exposed in front of the movement of the injection punch;

s12, conveying lubricating oil to the front of the movement of the injection punch head for the first time through a lubricating oil groove of a lubricating oil channel;

s13, controlling the injection punch to advance from the first initial position to the ending position and then retreat from the ending position to the second initial position, namely, controlling the injection punch to perform idle stroke movement, so that the lubricating oil performs first lubrication between the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch during the idle stroke of the injection punch; when the injection punch head retreats to the second initial position, all the lubricating oil grooves are covered by the injection punch head;

s14, pouring molten metal into the melting cup;

s15, conveying the lubricating oil to the periphery of the injection punch for the second time through the lubricating oil groove of the lubricating oil channel;

s16, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil performs secondary lubrication between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the metal liquid;

and S17, controlling the shot punch to return to the first starting position.

6. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 5 wherein: in steps S12 and S15, the lubricant is adjustably and quantitatively supplied by a lubricant supply system including a controller and a feed pump, the controller controlling the feed pump to feed the lubricant to the lubricant passage.

7. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 5 wherein: in step S15, the lubricating oil delivered for the second time overflows to the front of the movement of the injection punch through the gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the bowl.

8. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 5 wherein: the lubricating oil channel further comprises an oil inlet channel positioned in the side wall of the melting cup, an inlet of the oil inlet channel is exposed out of the end face of the melting cup, an outlet of the oil inlet channel is communicated with a lubricating oil groove, the lubricating oil groove is annular and is arranged on the inner side wall of the melting cup along the circumferential direction, and the lubricating oil groove is provided with at least two channels which are communicated with each other.

9. A method of lubricating a die casting machine melt bowl and shot punch as defined in claim 5 wherein: the injection device is a horizontal injection device or a vertical injection device.

10. A lubricating method of a double-injection cold chamber die casting machine is characterized in that:

the double-injection cold chamber die casting machine comprises a horizontal injection device and a vertical injection device;

the horizontal injection device comprises a horizontal melting cup and a horizontal injection punch which are matched with each other in a sliding mode, and the lubricating method between the horizontal melting cup and the horizontal injection punch adopts the lubricating method as claimed in claim 1 or 5;

the vertical injection device comprises a vertical melting cup and a vertical injection punch which are matched with each other in a sliding way, and the lubricating method between the vertical melting cup and the vertical injection punch adopts the lubricating method as claimed in claim 1 or 5.

Technical Field

The invention belongs to the technical field of injection lubrication methods of die casting machines, and particularly relates to a lubrication method between a melting cup and an injection punch of a die casting machine.

Background

Currently, the lubricant for the shot punches is typically dropped or granular lubricant is fed into the cup prior to pouring the molten aluminum. In the lubricating mode, because the lubricant is excessively concentrated, when the molten aluminum is poured into the melting cup, the molten aluminum is immediately combusted to generate gas and impurities (namely 'carbon collection'); due to the rapid advancement of the injection punch, these gases and impurities can be injected into the cavity of the die, which can significantly affect the internal quality of the die cast part. Accordingly, there is a need for improved methods of lubrication between the shot punch and the cup.

Disclosure of Invention

In view of the deficiencies of the prior art, it is an object of the present invention to provide a method of lubricating between a melt cup and an injection punch of a die casting machine.

In order to achieve the purpose, the invention adopts the following technical scheme: a lubricating method between a melting cup and an injection punch of a die casting machine is characterized in that the die casting machine comprises an injection device, the injection device comprises the melting cup and the injection punch which are in sliding fit with each other, a lubricating oil channel is arranged on the side wall of the melting cup, the lubricating oil channel comprises a lubricating oil groove located on the inner side wall of the melting cup, an initial position is arranged in the melting cup, and the injection punch covers all the lubricating oil grooves when in the initial position;

the lubricating method comprises the following steps:

s11, controlling the injection punch to be at the initial position, wherein all the lubricating oil grooves are covered by the injection punch;

s12, pressurizing and conveying lubricating oil to the injection punch through a lubricating oil groove of the lubricating oil channel, and overflowing the lubricating oil to the front of the movement of the injection punch through a gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the melting cup;

s13, pouring molten metal into the melting cup;

s14, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil lubricates the space between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the molten metal;

and S15, controlling the shot punch to return to the start position.

The invention supplies lubricant by pressurizing the lubricant groove of the lubricant duct, lubricates the injection punch head with higher pressure, and enables the lubricant to overflow to the front of the movement of the injection punch head through the clearance between the outer peripheral wall of the injection punch head and the inner peripheral wall of the melting cup, thus having better lubricating effect. The invention can uniformly distribute the lubricant on the inner peripheral wall of the melting cup, solves the problem that the lubricant is concentrated at a certain position (such as a pouring gate) of the melting cup, reduces the combustion amount of the lubricant when pouring molten metal, further reduces the gas amount and impurity amount generated by the combustion of the lubricant, improves the quality of die castings, and simultaneously prolongs the service life (at least one time of the service life) of the melting cup and the injection punch.

Preferably, in step S12, the lubricant is adjustably and quantitatively supplied by a lubricant supply system including a controller and a transfer pump, the controller controlling the transfer pump to transfer the lubricant to the lubricant passage.

Preferably, the lubricating oil channel further comprises an oil inlet channel positioned in the side wall of the melting cup, an inlet of the oil inlet channel is exposed out of the end face of the melting cup, and an outlet of the oil inlet channel is communicated with the lubricating oil groove.

Preferably, the lubricating oil grooves are annularly distributed on the inner peripheral wall of the melting cup.

Preferably, the lubricating oil grooves have at least two passages and are communicated with each other.

Preferably, the injection device is a horizontal injection device or a vertical injection device.

The invention also provides a lubricating method between the melting cup and the injection punch of the die casting machine, wherein the die casting machine comprises an injection device, the injection device comprises the melting cup and the injection punch which are in sliding fit with each other, the side wall of the melting cup is provided with a lubricating oil channel, the lubricating oil channel comprises a lubricating oil groove positioned on the inner side wall of the melting cup, a first starting position, a second starting position and an ending position are sequentially arranged in the melting cup, the injection punch exposes out part of the lubricating oil groove at the first starting position, and the injection punch covers all the lubricating oil groove at the second starting position;

the lubricating method comprises the following steps:

s11, controlling the injection punch to be at a first start position with a part of the lubricating oil groove exposed in front of the movement of the injection punch;

s12, conveying lubricating oil to the front of the movement of the injection punch head for the first time through a lubricating oil groove of a lubricating oil channel;

s13, controlling the injection punch to advance from the first initial position to the ending position and then retreat from the ending position to the second initial position, namely, controlling the injection punch to perform idle stroke movement, so that the lubricating oil performs first lubrication between the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch during the idle stroke of the injection punch; when the injection punch head retreats to the second initial position, all the lubricating oil grooves are covered by the injection punch head;

s14, pouring molten metal into the melting cup;

s15, conveying the lubricating oil to the periphery of the injection punch for the second time through the lubricating oil groove of the lubricating oil channel;

s16, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil performs secondary lubrication between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the metal liquid;

and S17, controlling the shot punch to return to the first starting position.

The invention divides the lubricant into two parts to be conveyed, firstly conveys one part of the lubricant to the periphery and the front of the injection punch, so that one part of the lubricant can lubricate the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch for the first time during the idle stroke of the injection punch, the lubrication is more sufficient, the lubrication effect is better, and then conveys the other part of the lubricant to the periphery (and the front) of the injection punch, so that the other part of the lubricant can lubricate the space between the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch for the second time during the injection of the molten metal by the injection punch, the lubrication is more sufficient, and the lubrication effect is better. The invention can uniformly distribute the lubricant on the inner peripheral wall of the melting cup, solves the problem that the lubricant is concentrated at a certain position (such as a pouring gate) of the melting cup, reduces the combustion amount of the lubricant when pouring molten metal, further reduces the gas amount and impurity amount generated by the combustion of the lubricant, improves the quality of die castings, and simultaneously prolongs the service life (at least one time of the service life) of the melting cup and the injection punch.

Preferably, in steps S12 and S15, the lubricant is adjustably and quantitatively supplied by a lubricant supply system including a controller and a feed pump, the controller controlling the feed pump to feed the lubricant to the lubricant passage.

Preferably, in step S15, the lubricating oil fed for the second time overflows to the front of the movement of the injection punch through the gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the bowl. By the technical means, the secondary lubricating effect of the invention is better.

Preferably, the lubricating oil channel further comprises an oil inlet channel positioned in the side wall of the melting cup, an inlet of the oil inlet channel is exposed out of the end face of the melting cup, and an outlet of the oil inlet channel is communicated with the lubricating oil groove.

Preferably, the lubricating oil groove is annular and is opened on the inner side wall of the melting cup along the circumferential direction.

Preferably, the lubricating oil grooves have at least two passages and are communicated with each other.

Preferably, the injection device is a horizontal injection device or a vertical injection device.

The invention also provides a lubricating method of the double-injection cold chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device and a vertical injection device;

the horizontal injection device comprises a horizontal melting cup and a horizontal injection punch which are in sliding fit with each other, and the lubricating method between the horizontal melting cup and the horizontal injection punch adopts any one of the two lubricating methods between the melting cup and the injection punch;

the vertical injection device comprises a vertical melting cup and a vertical injection punch which are matched with each other in a sliding mode, and the lubricating method between the vertical melting cup and the vertical injection punch adopts any one of the two lubricating methods between the melting cup and the injection punch.

The lubrication mode of the present invention is of two types: in the first mode, the lubricating oil is pressurized and conveyed through the lubricating oil groove of the lubricating oil channel, the injection punch head is lubricated at higher pressure, and the lubricating oil overflows to the front of the movement of the injection punch head through the gap between the outer peripheral wall of the injection punch head and the inner peripheral wall of the melting cup, so that the lubricating effect is better. And in the second mode, the lubricant is divided into two parts to be conveyed, one part of the lubricant is conveyed to the outer periphery and the front of the injection punch, so that one part of the lubricant can lubricate the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch for the first time during idle stroke of the injection punch, the lubrication is sufficient, the lubrication effect is good, the other part of the lubricant is conveyed to the outer periphery (and the front) of the injection punch, and the other part of the lubricant can lubricate the space between the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch for the second time during injection of molten metal by the injection punch (the first mode can be adopted), the lubrication is more sufficient, and the lubrication effect is better. The two modes can ensure that the lubricant is uniformly distributed on the inner peripheral wall of the melting cup, solve the problem that the lubricant is concentrated at a certain position (such as a pouring gate) of the melting cup, reduce the combustion amount of the lubricant when metal liquid is poured, further reduce the gas amount and impurity amount generated by the combustion of the lubricant, improve the quality of die castings, and simultaneously improve the service lives (at least one time of service life) of the melting cup and the injection punch.

Drawings

Fig. 1 is a schematic view showing the lubrication of the horizontal injection device in the third and fourth embodiments of the fifth embodiment of the present invention.

Fig. 2 is a schematic view showing the lubrication of the horizontal injection device in the first, second and fifth embodiments of the fifth embodiment of the present invention.

Fig. 3 is a schematic view showing the lubrication of the vertical injection device in the third and fifth embodiments of the fifth embodiment of the present invention.

Fig. 4 is a schematic view showing the lubrication of the vertical injection device in the first, second and fourth embodiments of the fifth embodiment of the present invention.

The labels in the figure are: 100. a horizontal injection device; 110. a horizontal melting cup; 111. a first lubricating oil passage; 112. a first lubricating oil groove; 113. a first oil inlet passage; 120. horizontal injection punch heads; 200. a vertical injection device; 210. a vertical melting cup; 211. a second lubricating oil passage; 212. a second lubrication groove; 213. a second oil inlet passage; 220. a vertical injection punch; h1, first start position; h2, second start position; h3, first end position; h4, third start position; h5, fourth start position; h6, second end position; ht, stroke of the injection punch in corresponding lubricating time; p1, oil supply pressure for first lubrication of the horizontal injection device; p2, oil supply pressure of second lubrication of the horizontal injection device; p3, oil supply pressure for first lubrication of the vertical injection device; p4, oil supply pressure of the second lubrication of the vertical injection device; t1, idle stroke reciprocating time of the horizontal injection punch; t2, reciprocating time of injection stroke of the horizontal injection punch; t3, idle stroke reciprocating time of the vertical injection punch; t4, shot stroke reciprocation time of the vertical shot punch.

Detailed Description

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

The first embodiment is as follows: referring to fig. 2 and 4, a method for lubricating a molten cup and an injection punch of a die casting machine includes providing an injection device, where the injection device includes the molten cup and the injection punch which are slidably engaged with each other, a lubricating oil channel is provided on a side wall of the molten cup, the lubricating oil channel includes a lubricating oil groove on an inner side wall of the molten cup, a start position is provided in the molten cup, and the injection punch covers all the lubricating oil grooves at the start position;

the lubricating method comprises the following steps:

s11, controlling the injection punch to be at the initial position, wherein all the lubricating oil grooves are covered by the injection punch;

s12, pressurizing and conveying lubricating oil to the injection punch through a lubricating oil groove of the lubricating oil channel, and overflowing the lubricating oil to the front of the movement of the injection punch through a gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the melting cup;

s13, pouring molten metal into the melting cup;

s14, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil lubricates the space between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the molten metal;

and S15, controlling the shot punch to return to the start position.

The embodiment pressurizes and conveys the lubricant through the lubricating oil groove of the lubricating oil channel, lubricates the injection punch head at higher pressure, enables the lubricating oil to overflow to the front of the movement of the injection punch head through the gap between the outer peripheral wall of the injection punch head and the inner peripheral wall of the melting cup, and has better lubricating effect. The invention can uniformly distribute the lubricant on the inner peripheral wall of the melting cup, solves the problem that the lubricant is concentrated at a certain position (such as a pouring gate) of the melting cup, reduces the combustion amount of the lubricant when pouring molten metal, further reduces the gas amount and impurity amount generated by the combustion of the lubricant, improves the quality of die castings, and simultaneously prolongs the service life (at least one time of the service life) of the melting cup and the injection punch.

In this embodiment, in step S12, the lubricant oil may be adjustably and quantitatively supplied by a lubricant oil supply system including a controller and an oil transfer pump, the controller controlling the oil transfer pump to transfer the lubricant oil to the lubricant oil passage. By adopting the technical means, the embodiment realizes that the conveying time and the conveying amount of the lubricating oil are both adjustable.

In this embodiment, the lubricating oil channel further comprises an oil inlet channel located in the side wall of the melting cup, an inlet of the oil inlet channel is exposed out of the end face of the melting cup, and an outlet of the oil inlet channel is communicated with the lubricating oil groove. Wherein, the lubricating oil groove is preferably, but not limited to, annular and is opened on the inner side wall of the melting cup along the circumferential direction. The lubricating oil grooves are at least provided with two channels (such as three channels) and are communicated with each other, such as three annular lubricating oil grooves which are distributed side by side, and the adjacent two lubricating oil grooves are communicated with each other through a plurality of axial oil grooves (such as four axial oil grooves which are uniformly distributed).

In the present embodiment, the injection device is either the horizontal type injection device 100 or the vertical type injection device 200.

Example two: referring to fig. 1 and 3, a method for lubricating a melt cup and an injection punch of a die casting machine includes providing an injection device including the melt cup and the injection punch which are slidably engaged with each other, providing a lubricating oil channel on a side wall of the melt cup, the lubricating oil channel including a lubricating oil groove on an inner side wall of the melt cup, sequentially providing a first start position, a second start position and an end position in the melt cup, exposing a part of the lubricating oil groove (e.g., one of the plurality of lubricating oil grooves) when the injection punch is at the first start position, and covering all the lubricating oil grooves when the injection punch is at the second start position;

the lubricating method comprises the following steps:

s11, controlling the injection punch to be at a first start position with a part of the lubricating oil groove exposed in front of the movement of the injection punch;

s12, conveying lubricating oil to the front of the movement of the injection punch head for the first time through a lubricating oil groove of a lubricating oil channel;

s13, controlling the injection punch to advance from the first initial position to the ending position and then retreat from the ending position to the second initial position, namely, controlling the injection punch to perform idle stroke movement, so that the lubricating oil performs first lubrication between the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch during the idle stroke of the injection punch; when the injection punch head retreats to the second initial position, all the lubricating oil grooves are covered by the injection punch head;

s14, pouring molten metal into the melting cup;

s15, conveying the lubricating oil to the periphery of the injection punch for the second time through the lubricating oil groove of the lubricating oil channel;

s16, controlling the injection punch to perform injection action, and hydraulically injecting the metal in the molten cup, so that the lubricating oil performs secondary lubrication between the inner peripheral wall of the molten cup and the outer peripheral wall of the injection punch when the injection punch injects the metal liquid;

and S17, controlling the shot punch to return to the first starting position.

This embodiment is divided into two parts with the lubricant and is carried, carry a part of lubricant earlier to the periphery and the place ahead of pressing the injection drift for a part of lubricant carries out the first lubrication to the internal perisporium of melting cup and the periphery wall of pressing the injection drift when pressing the injection drift idle stroke, it is more abundant to lubricate, and lubrication effect is better, carries another part of lubricant to the periphery (and the place ahead) of pressing the injection drift again, makes another part of lubricating oil carry out the second lubrication between the internal perisporium of melting cup and the periphery wall of pressing the injection drift when pressing the injection drift and press the injection metal liquid, and it is more abundant to lubricate, and lubrication effect is better. The invention can uniformly distribute the lubricant on the inner peripheral wall of the melting cup, solves the problem that the lubricant is concentrated at a certain position (such as a pouring gate) of the melting cup, reduces the combustion amount of the lubricant when pouring molten metal, further reduces the gas amount and impurity amount generated by the combustion of the lubricant, improves the quality of die castings, and simultaneously prolongs the service life (at least one time of the service life) of the melting cup and the injection punch.

In the present embodiment, in steps S12 and S15, the lubricant oil is adjustably and quantitatively supplied by a lubricant oil supply system including a controller and an oil feed pump, the controller controlling the oil feed pump to feed the lubricant oil to the lubricant oil gallery.

In this embodiment, in step S15, the lubricating oil fed for the second time overflows to the front of the movement of the injection punch through the gap between the outer peripheral wall of the injection punch and the inner peripheral wall of the bowl. By the technical means, the secondary lubricating effect of the invention is better.

In the present embodiment, in steps S13 and S16, the speed of the injection punch at the time of the idle stroke and the speed at the time of injecting the molten metal are both adjustable; for example, the speed of the shot punch during the lost motion is preferably, but not limited to, greater than (and of course, may be less than or equal to) the speed of the shot of molten metal, thereby saving production time and improving production efficiency.

In this embodiment, the lubricating oil channel further comprises an oil inlet channel located in the side wall of the melting cup, an inlet of the oil inlet channel is exposed out of the end face of the melting cup, and an outlet of the oil inlet channel is communicated with the lubricating oil groove. Wherein, the lubricating oil groove is preferably, but not limited to, annular and is opened on the inner side wall of the melting cup along the circumferential direction. The lubricating oil grooves are at least provided with two (such as three) lubricating oil grooves which are communicated with each other, such as three annular lubricating oil grooves which are distributed side by side, and the adjacent two lubricating oil grooves are communicated with each other through a plurality of axial oil grooves.

In the present embodiment, the injection device is either the horizontal type injection device 100 or the vertical type injection device 200.

Example three: referring to fig. 1 to 4, a method for lubricating a dual-injection cold chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device 100 and a vertical injection device 200;

the horizontal injection device 100 comprises a horizontal melting cup 110 and a horizontal injection punch 120 which are matched with each other in a sliding way, and the lubricating method between the horizontal melting cup 110 and the horizontal injection punch 120 adopts any one of the two lubricating methods of the first embodiment and the second embodiment;

the vertical shot device 200 includes a vertical cup 210 and a vertical shot punch 220 that are slidably engaged with each other, and the lubrication method between the vertical cup 210 and the vertical shot punch 220 employs either of the two lubrication methods of the first and second embodiments described above.

The lubrication mode of the present embodiment is of two types: in the first mode, the lubricating oil is pressurized and conveyed through the lubricating oil groove of the lubricating oil channel, the injection punch head is lubricated at higher pressure, and the lubricating oil overflows to the front of the movement of the injection punch head through the gap between the outer peripheral wall of the injection punch head and the inner peripheral wall of the melting cup, so that the lubricating effect is better. And in the second mode, the lubricant is divided into two parts to be conveyed, one part of the lubricant is conveyed to the outer periphery and the front of the injection punch, so that one part of the lubricant can lubricate the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch for the first time during idle stroke of the injection punch, the lubrication is sufficient, the lubrication effect is good, the other part of the lubricant is conveyed to the outer periphery (and the front) of the injection punch, and the other part of the lubricant can lubricate the space between the inner peripheral wall of the melting cup and the outer peripheral wall of the injection punch for the second time during injection of molten metal by the injection punch (the first mode can be adopted), the lubrication is more sufficient, and the lubrication effect is better. The two modes can ensure that the lubricant is uniformly distributed on the inner peripheral wall of the melting cup, solve the problem that the lubricant is concentrated at a certain position (such as a pouring gate) of the melting cup, reduce the combustion amount of the lubricant when metal liquid is poured, further reduce the gas amount and impurity amount generated by the combustion of the lubricant, improve the quality of die castings, and simultaneously improve the service lives (at least one time of service life) of the melting cup and the injection punch.

In the present embodiment, the lubrication method of the dual-injection cold chamber die casting machine specifically includes, but is not limited to, the following.

The first scheme is as follows: referring to fig. 2 and 4, a method of lubricating a dual-injection cold-chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device 100 and a vertical injection device 200;

the horizontal type injection device 100 comprises a horizontal type melting cup 110 and a horizontal type injection punch 120 which are matched with each other in a sliding mode, a first lubricating oil channel 111 is arranged on the side wall of the horizontal type melting cup 110, the first lubricating oil channel 111 comprises a first lubricating oil groove 112 located on the inner side wall of the horizontal type melting cup 110, a first starting position H1 is arranged in the horizontal type melting cup 110, and the horizontal type injection punch 120 covers all the first lubricating oil grooves 112 when in the first starting position H1;

the vertical injection device 200 comprises a vertical melting cup 210 and a vertical injection punch 220 which are in sliding fit with each other, a second lubricating oil channel 211 is arranged on the side wall of the vertical melting cup 210, the second lubricating oil channel 211 comprises a second lubricating oil groove 212 which is positioned on the inner side wall of the vertical melting cup 210, a third starting position H4 is arranged in the vertical melting cup 210, and the vertical injection punch 220 covers all the second lubricating oil grooves 212 when in the third starting position H4;

the lubricating method comprises the following steps:

s11, controlling the horizontal shot punch 120 to be at the first start position H1 and the vertical shot punch 220 to be at the third start position H4, wherein all the first lubricating oil grooves 112 are covered by the horizontal shot punch 120 and all the second lubricating oil grooves 212 are covered by the vertical shot punch 220;

s12, pressurizing and conveying the lubricating oil to the horizontal injection punch 120 through the first lubricating oil groove 112 of the first lubricating oil channel 111, and overflowing the lubricating oil to the front of the movement of the horizontal injection punch 120 through the gap between the outer peripheral wall of the horizontal injection punch 120 and the inner peripheral wall of the horizontal beaker 110; pressurizing and delivering lubricating oil to the vertical shot punch 220 through the second lubricating oil grooves 212 of the second lubricating oil passages 211, and overflowing the lubricating oil to the front of the movement of the vertical shot punch 220 through the clearance between the outer peripheral wall of the vertical shot punch 220 and the inner peripheral wall of the vertical melting cup 210;

s13, pouring molten metal into the horizontal melting cup 110;

s14, controlling the horizontal injection punch 120 to perform an injection action, and injecting the molten metal in the horizontal cup 110 into the cavity of the die, so that the lubricating oil lubricates the space between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120 when the horizontal injection punch 120 injects the molten metal;

s15, controlling one of the horizontal injection punch 120 and the vertical injection punch 220 to perform a first pressurizing action to perform a first pressing of the molten metal in the liquid phase;

s16, controlling the other one of the horizontal injection punch 120 and the vertical injection punch 220 to perform a second pressurizing action, and performing a second extrusion on the metal in the solid-liquid mixed phase;

s17, after the pressure holding, the horizontal shot punch 120 is controlled to return to the first start position H1, and the vertical shot punch 220 is controlled to return to the third start position H4 for the next cycle.

In step S15 or step S16, when the horizontal injection punch 120 performs the pressurizing action, the lubricating oil lubricates between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120; when the vertical shot punch 220 is operated to pressurize, the lubricating oil lubricates between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical shot punch 220.

Scheme II: referring to fig. 2 and 4, a method of lubricating a dual-injection cold-chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device 100 and a vertical injection device 200;

the horizontal type injection device 100 comprises a horizontal type melting cup 110 and a horizontal type injection punch 120 which are matched with each other in a sliding mode, a first lubricating oil channel 111 is arranged on the side wall of the horizontal type melting cup 110, the first lubricating oil channel 111 comprises a first lubricating oil groove 112 located on the inner side wall of the horizontal type melting cup 110, a first starting position H1 is arranged in the horizontal type melting cup 110, and the horizontal type injection punch 120 covers all the first lubricating oil grooves 112 when in the first starting position H1;

the vertical injection device 200 comprises a vertical melting cup 210 and a vertical injection punch 220 which are in sliding fit with each other, a second lubricating oil channel 211 is arranged on the side wall of the vertical melting cup 210, the second lubricating oil channel 211 comprises a second lubricating oil groove 212 which is positioned on the inner side wall of the vertical melting cup 210, a third starting position H4 is arranged in the vertical melting cup 210, and the vertical injection punch 220 covers all the second lubricating oil grooves 212 when in the third starting position H4;

the lubricating method comprises the following steps:

s11, controlling the horizontal shot punch 120 to be at the first start position H1 and the vertical shot punch 220 to be at the third start position H4, wherein all the first lubricating oil grooves 112 are covered by the horizontal shot punch 120 and all the second lubricating oil grooves 212 are covered by the vertical shot punch 220;

s12, pressurizing and conveying the lubricating oil to the horizontal injection punch 120 through the first lubricating oil groove 112 of the first lubricating oil channel 111, and overflowing the lubricating oil to the front of the movement of the horizontal injection punch 120 through the gap between the outer peripheral wall of the horizontal injection punch 120 and the inner peripheral wall of the horizontal beaker 110; pressurizing and delivering lubricating oil to the vertical shot punch 220 through the second lubricating oil grooves 212 of the second lubricating oil passages 211, and overflowing the lubricating oil to the front of the movement of the vertical shot punch 220 through the clearance between the outer peripheral wall of the vertical shot punch 220 and the inner peripheral wall of the vertical melting cup 210;

s13, pouring molten metal into the horizontal melting cup 110;

s14, controlling the horizontal injection punch 120 to perform an injection action, and injecting the molten metal in the horizontal cup 110 into the vertical cup 210, so that the lubricating oil lubricates the space between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120 when the horizontal injection punch 120 injects the molten metal;

s15, controlling the vertical injection punch 220 to perform an injection action, and injecting the molten metal in the vertical cup 210 into the cavity of the die so that the lubricating oil lubricates the space between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical injection punch 220 when the vertical injection punch 220 injects the molten metal;

s18, after the pressure holding, the horizontal shot punch 120 is controlled to return to the first start position H1, and the vertical shot punch 220 is controlled to return to the third start position H4 for the next cycle.

In the foregoing aspect, the lubrication method may further include, between step S15 and step S18, the steps of:

s16, one of the vertical shot punch 220 and the horizontal shot punch 120 is controlled to perform the first pressurizing operation to perform the first pressing of the molten metal in the liquid phase.

In the foregoing aspect, the lubrication method may further include, between step S16 and step S18, the steps of:

s17, the other of the vertical shot punch 220 and the horizontal shot punch 120 is controlled to perform the second pressurizing operation to press the metal in the solid-liquid mixed phase for the second time.

In step S16 or step S17, when the horizontal injection punch 120 performs the pressurizing action, the lubricating oil lubricates between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120; when the vertical shot punch 220 is operated to pressurize, the lubricating oil lubricates between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical shot punch 220.

The third scheme is as follows: as shown in fig. 1 and 3, a method of lubricating a double-shot cold chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device 100 and a vertical injection device 200;

the horizontal type injection device 100 comprises a horizontal type melting cup 110 and a horizontal type injection punch 120 which are in sliding fit with each other, a first lubricating oil channel 111 is arranged on the side wall of the horizontal type melting cup 110, the first lubricating oil channel 111 comprises a first lubricating oil groove 112 positioned on the inner side wall of the horizontal type melting cup 110, a first starting position H1, a second starting position H2 and a first ending position H3 are sequentially arranged in the horizontal type melting cup 110, a part of the first lubricating oil groove 112 (such as one of a plurality of first lubricating oil grooves 112) is exposed when the horizontal type injection punch 120 is at the first starting position H1, and the horizontal type injection punch 120 covers all the first lubricating oil grooves 112 when the horizontal type injection punch is at the second starting position H2;

the vertical injection device 200 comprises a vertical melting cup 210 and a vertical injection punch 220 which are in sliding fit with each other, a second lubricating oil channel 211 is arranged on the side wall of the vertical melting cup 210, the second lubricating oil channel 211 comprises a second lubricating oil groove 212 which is positioned on the inner side wall of the vertical melting cup 210, a third starting position H4, a fourth starting position H5 and a second ending position H6 are sequentially arranged in the vertical melting cup 210, a part of the second lubricating oil groove 212 (such as one of a plurality of second lubricating oil grooves 212) is exposed when the vertical injection punch 220 is at the third starting position H4, and the vertical injection punch 220 covers all the second lubricating oil grooves 212 when the vertical injection punch 220 is at the fourth starting position H5;

the lubricating method comprises the following steps:

s11, controlling the horizontal shot punch 120 to be located at the first start position H1 and the vertical shot punch 220 to be located at the third start position H4, with a portion of the first lubricating oil groove 112 exposed in front of the movement of the horizontal shot punch 120 and a portion of the second lubricating oil groove 212 exposed in front of the movement of the vertical shot punch 220;

s12, delivering lubricating oil for the first time (at pressure P1) ahead of the movement of the horizontal shot punch 120 through the first lubricating oil groove 112 of the first lubricating oil passage 111 and for the first time (at pressure P3) ahead of the movement of the vertical shot punch 220 through the second lubricating oil groove 212 of the second lubricating oil passage 211; wherein pressure P1 may be equal to pressure P3;

s13, controlling the horizontal injection punch 120 to advance from the first start position H1 to the first end position H3 and then retreat from the first end position H3 to the second start position H2, i.e., the horizontal injection punch 120 performs idle stroke movement, so that the lubricating oil performs first lubrication between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120 during the idle stroke of the horizontal injection punch 120; controlling the vertical shot punch 220 to advance from the third start position H4 to the second end position H6 and then to retreat from the second end position H6 to the fourth start position H5, i.e., the vertical shot punch 220 performs an idle stroke movement, so that the lubricating oil performs a first lubrication between the inner peripheral wall of the vertical melt cup 210 and the outer peripheral wall of the vertical shot punch 220 at the time of the idle stroke of the vertical shot punch 220; wherein when the horizontal shot punch 120 is retracted to the second home position H2, all of the first lubricating oil grooves 112 are covered by the horizontal shot punch 120; when the vertical shot punch 220 is retracted to the fourth starting position H5, all the second lubricating oil grooves 212 are covered by the vertical shot punch 220;

s14, pouring molten metal into the horizontal melting cup 110;

s15, delivering the lubricating oil to the outer periphery of the horizontal shot punch 120 for a second time (at pressure P2) through the first lubricating oil groove 112 of the first lubricating oil gallery 111; meanwhile, controlling the horizontal injection punch 120 to perform injection action, and injecting the molten metal in the horizontal melting cup 110 into the vertical melting cup 210, so that the lubricating oil performs second lubrication between the inner peripheral wall of the horizontal melting cup 110 and the outer peripheral wall of the horizontal injection punch 120 when the horizontal injection punch 120 injects the molten metal; wherein pressure P2 is preferably, but not limited to, 1.5 times pressure P1; the oil supply amount of the second lubrication is preferably, but not limited to, controlled to be 3-7 ml;

s16, delivering the lubricating oil to the outer periphery of the vertical shot punch 220 for a second time (at pressure P4) through the second lubricating oil groove 212 of the second lubricating oil passage 211; meanwhile, controlling the vertical injection punch 220 to perform injection action, and injecting the molten metal in the vertical melting cup 210 into the cavity of the die, so that the lubricating oil performs second lubrication between the inner peripheral wall of the vertical melting cup 210 and the outer peripheral wall of the vertical injection punch 220 when the vertical injection punch 220 injects the molten metal; wherein pressure P4 is preferably, but not limited to, 1.5 times pressure P3; the oil supply amount of the second lubrication is preferably, but not limited to, controlled to be 3-7 ml;

s19, after the pressure holding, the horizontal shot punch 120 is controlled to return to the first start position H1, and the vertical shot punch 220 is controlled to return to the third start position H4 for the next cycle.

In the foregoing aspect, the lubrication method may further include, between step S16 and step S19, the steps of:

s17, one of the vertical shot punch 220 and the horizontal shot punch 120 is controlled to perform the first pressurizing operation to perform the first pressing of the molten metal in the liquid phase.

In the foregoing aspect, the lubrication method may further include, between step S17 and step S19, the steps of:

s18, the other of the vertical shot punch 220 and the horizontal shot punch 120 is controlled to perform the second pressurizing operation to press the metal in the solid-liquid mixed phase for the second time.

In step S17 or step S18, when the horizontal injection punch 120 performs the pressurizing action, the lubricating oil lubricates between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120; when the vertical shot punch 220 is operated to pressurize, the lubricating oil lubricates between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical shot punch 220.

And the scheme is as follows: referring to fig. 1 and 4, a method of lubricating a dual-injection cold chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device 100 and a vertical injection device 200;

the horizontal type injection device 100 comprises a horizontal type melting cup 110 and a horizontal type injection punch 120 which are in sliding fit with each other, a first lubricating oil channel 111 is arranged on the side wall of the horizontal type melting cup 110, the first lubricating oil channel 111 comprises a first lubricating oil groove 112 positioned on the inner side wall of the horizontal type melting cup 110, a first starting position H1, a second starting position H2 and a first ending position H3 are sequentially arranged in the horizontal type melting cup 110, a part of the first lubricating oil groove 112 (such as one of a plurality of first lubricating oil grooves 112) is exposed when the horizontal type injection punch 120 is at the first starting position H1, and the horizontal type injection punch 120 covers all the first lubricating oil grooves 112 when the horizontal type injection punch is at the second starting position H2;

the vertical injection device 200 comprises a vertical melting cup 210 and a vertical injection punch 220 which are in sliding fit with each other, a second lubricating oil channel 211 is arranged on the side wall of the vertical melting cup 210, the second lubricating oil channel 211 comprises a second lubricating oil groove 212 which is positioned on the inner side wall of the vertical melting cup 210, a third starting position H4 is sequentially arranged in the vertical melting cup 210, and the vertical injection punch 220 covers all the second lubricating oil grooves 212 when in the third starting position H4;

the lubricating method comprises the following steps:

s11, controlling the horizontal shot punch 120 to be at the first start position H1 and the vertical shot punch 220 to be at the third start position H4, with part of the first lubricating oil grooves 112 exposed in front of the movement of the horizontal shot punch 120 and all of the second lubricating oil grooves 212 covered by the vertical shot punch 220;

s12, delivering the lubricating oil for the first time to the front of the movement of the horizontal shot punch head 120 through the first lubricating oil groove 112 of the first lubricating oil channel 111;

s13, controlling the horizontal injection punch 120 to advance from the first start position H1 to the first end position H3 and then retreat from the end position H3 to the second start position H2, i.e., the horizontal injection punch 120 performs idle stroke movement, so that the lubricating oil performs first lubrication between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120 during the idle stroke of the horizontal injection punch 120; wherein when the horizontal shot punch 120 is retracted to the second home position H2, all of the first lubricating oil grooves 112 are covered by the horizontal shot punch 120;

s14, pouring molten metal into the horizontal melting cup 110;

s15, delivering the lubricating oil to the outer periphery of the horizontal shot punch 120 for the second time through the first lubricating oil grooves 112 of the first lubricating oil passages 111; second delivering the lubricating oil to the outer periphery of the vertical shot punch 220 through the second lubricating oil groove 212 of the second lubricating oil gallery 211; pressurizing and delivering lubricating oil to the vertical shot punch 220 through the second lubricating oil grooves 212 of the second lubricating oil passages 211, and overflowing the lubricating oil to the front of the movement of the vertical shot punch 220 through the clearance between the outer peripheral wall of the vertical shot punch 220 and the inner peripheral wall of the vertical melting cup 210;

s16, controlling the horizontal injection punch 120 to perform an injection action, and injecting the molten metal in the horizontal cup 110 into the cavity of the die, so that the lubricating oil performs a second lubrication between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120 when the horizontal injection punch 120 injects the molten metal;

s17, controlling one of the horizontal injection punch 120 and the vertical injection punch 220 to perform a first pressurizing action to perform a first pressing of the molten metal in the liquid phase;

s18, controlling the other one of the horizontal injection punch 120 and the vertical injection punch 220 to perform a second pressurizing action, and performing a second extrusion on the metal in the solid-liquid mixed phase;

s19, after the pressure holding, the horizontal shot punch 120 is controlled to return to the first start position H1, and the vertical shot punch 220 is controlled to return to the third start position H4 for the next cycle.

In step S17 or step S18, when the horizontal injection punch 120 performs the pressurizing action, the lubricating oil lubricates between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120; when the vertical shot punch 220 is operated to pressurize, the lubricating oil lubricates between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical shot punch 220.

And a fifth scheme: referring to fig. 2 and 3, a method of lubricating a dual-injection cold-chamber die casting machine,

the double-injection cold chamber die casting machine comprises a horizontal injection device 100 and a vertical injection device 200;

the horizontal type injection device 100 comprises a horizontal type melting cup 110 and a horizontal type injection punch head 120 which are matched with each other in a sliding mode, a first lubricating oil channel 111 is arranged on the side wall of the horizontal type melting cup 110, the first lubricating oil channel 111 comprises a first lubricating oil groove 112 located on the inner side wall of the horizontal type melting cup 110, a first starting position H1 is sequentially arranged in the horizontal type melting cup 110, and the horizontal type injection punch head 120 covers all the first lubricating oil grooves 112 when in the first starting position H1;

the vertical injection device 200 comprises a vertical melting cup 210 and a vertical injection punch 220 which are in sliding fit with each other, a second lubricating oil channel 211 is arranged on the side wall of the vertical melting cup 210, the second lubricating oil channel 211 comprises a second lubricating oil groove 212 which is positioned on the inner side wall of the vertical melting cup 210, a third starting position H4, a fourth starting position H5 and a second ending position H6 are sequentially arranged in the vertical melting cup 210, a part of the second lubricating oil groove 212 (such as one of a plurality of second lubricating oil grooves 212) is exposed when the vertical injection punch 220 is at the third starting position H4, and the vertical injection punch 220 covers all the second lubricating oil grooves 212 when the vertical injection punch 220 is at the fourth starting position H5;

the lubricating method comprises the following steps:

s11, controlling the horizontal shot punch 120 to be at the first start position H1 and the vertical shot punch 220 to be at the third start position H4, wherein all of the first lubricating oil grooves 112 are covered by the horizontal shot punch 120 and a portion of the second lubricating oil grooves 212 are exposed in front of the movement of the vertical shot punch 220;

s12, pressurizing and conveying the lubricating oil to the horizontal injection punch 120 through the first lubricating oil groove 112 of the first lubricating oil channel 111, and overflowing the lubricating oil to the front of the movement of the horizontal injection punch 120 through the gap between the outer peripheral wall of the horizontal injection punch 120 and the inner peripheral wall of the horizontal beaker 110; the lubricating oil is first delivered to the front of the movement of the vertical shot punch 220 through the second lubricating oil groove 212 of the second lubricating oil passage 211;

s13, controlling the vertical injection punch 220 to advance from the third starting position H4 to the second ending position H6 and then retreat from the second ending position H6 to the fourth starting position H5, i.e., the vertical injection punch 220 performs idle stroke movement, so that the lubricating oil performs first lubrication between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical injection punch 220 during the idle stroke of the vertical injection punch 220; when the vertical injection punch 220 is retracted to the fourth starting position H5, all the second lubricating oil grooves 212 are covered by the vertical injection punch 220;

s14, pouring molten metal into the horizontal melting cup 110;

s15, controlling the horizontal injection punch 120 to perform an injection action, and injecting the molten metal in the horizontal cup 110 into the vertical cup 210, so that the lubricating oil lubricates the space between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120 when the horizontal injection punch 120 injects the molten metal;

s16, delivering the lubricating oil to the outer periphery of the vertical shot punch 220 for a second time through the second lubricating oil grooves 212 of the second lubricating oil passages 211; meanwhile, controlling the vertical injection punch 220 to perform injection action, and injecting the molten metal in the vertical melting cup 210 into the cavity of the die, so that the lubricating oil lubricates the space between the inner peripheral wall of the vertical melting cup 210 and the outer peripheral wall of the vertical injection punch 220 when the vertical injection punch 220 injects the molten metal;

s19, after the pressure holding, the horizontal shot punch 120 is controlled to return to the first start position H1, and the vertical shot punch 220 is controlled to return to the third start position H4 for the next cycle.

In the foregoing aspect, the lubrication method may further include, between step S16 and step S19, the steps of:

s17, one of the vertical shot punch 220 and the horizontal shot punch 120 is controlled to perform the first pressurizing operation to perform the first pressing of the molten metal in the liquid phase.

In the foregoing aspect, the lubrication method may further include, between step S17 and step S19, the steps of:

s18, the other of the vertical shot punch 220 and the horizontal shot punch 120 is controlled to perform the second pressurizing operation to press the metal in the solid-liquid mixed phase for the second time.

In step S17 or step S18, when the horizontal injection punch 120 performs the pressurizing action, the lubricating oil lubricates between the inner peripheral wall of the horizontal cup 110 and the outer peripheral wall of the horizontal injection punch 120; when the vertical shot punch 220 is operated to pressurize, the lubricating oil lubricates between the inner peripheral wall of the vertical cup 210 and the outer peripheral wall of the vertical shot punch 220.

It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.