阅读说明：本技术 一种用于炮钢铸造的增压铸造设备及工艺 (Pressurizing casting equipment and process for casting gun steel ) 是由 王元飞 雷艳 雷君红 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种用于炮钢铸造的增压铸造设备,包括真空室和门板,所述门板可开合地安装于真空室前侧,还包括：熔炼机构,安装于所述真空室的上表面左侧；真空泵,安装于所述真空室的上表面中部,且进气口通过气管与真空室顶部连通；制冷机,安装于所述真空室的上表面右侧；翻转机构,数量为两个,分别固定连接于所述真空室的左右内壁底部；定模,可翻转地设置于所述翻转机构的内侧；第一液压油缸,数量为两个,分别安装于所述真空室的内腔顶部左右两侧。本发明可实现定模和动模的主动冷却,提高铸造效率,另外,无需使用任何设备对毛坯料抓取便可取出,避免损坏定模,大大提高了铸造的安全性。(The invention discloses a pressurizing casting device for casting gun steel, which comprises a vacuum chamber and a door plate, wherein the door plate is arranged on the front side of the vacuum chamber in an openable manner, and the pressurizing casting device also comprises: the smelting mechanism is arranged on the left side of the upper surface of the vacuum chamber; the vacuum pump is arranged in the middle of the upper surface of the vacuum chamber, and the air inlet is communicated with the top of the vacuum chamber through an air pipe; the refrigerator is arranged on the right side of the upper surface of the vacuum chamber; the two turnover mechanisms are respectively and fixedly connected to the bottoms of the left inner wall and the right inner wall of the vacuum chamber; the fixed die is arranged on the inner side of the turnover mechanism in a turnover manner; the first hydraulic oil cylinders are two in number and are respectively arranged on the left side and the right side of the top of the inner cavity of the vacuum chamber. The invention can realize the active cooling of the fixed die and the movable die, improve the casting efficiency, and can take out the blank material without using any equipment to grab, thereby avoiding damaging the fixed die and greatly improving the casting safety.)

1. A pressure boost casting equipment for gun steel casting, includes real empty room (1) and door plant (2), door plant (2) install in real empty room (1) front side openably and closedly, characterized by still includes:

the smelting mechanism (3) is arranged on the left side of the upper surface of the vacuum chamber (1);

the vacuum pump (4) is arranged in the middle of the upper surface of the vacuum chamber (1), and an air inlet is communicated with the top of the vacuum chamber (1) through an air pipe;

a refrigerator (5) mounted on the right side of the upper surface of the vacuum chamber (1);

the two turnover mechanisms (6) are fixedly connected to the bottoms of the left inner wall and the right inner wall of the vacuum chamber (1) respectively;

the fixed die (7) is arranged on the inner side of the turnover mechanism (6) in a turnover manner;

the two first hydraulic oil cylinders (8) are respectively arranged on the left side and the right side of the top of the inner cavity of the vacuum chamber (1);

the cooling mechanism (9) is arranged at the output end of the first hydraulic oil cylinder (8), and a liquid outlet and a return port of the refrigerator (5) are communicated with the cooling mechanism (9) through water pipes;

the movable die (10) is arranged at the bottom end of the cooling mechanism (9), and the movable die (10) and the fixed die (7) are combined to form a die cavity;

the melting mechanism (3) comprises:

a melting box (31) mounted on the left side of the upper surface of the vacuum chamber (1);

a cover plate (32) which is openably and closably mounted on the top end of the smelting box (31);

a melting furnace (33) mounted on the inner wall of the melting box (31);

a valve (34) having one end mounted to the bottom of the melting furnace (33);

a drainage tube (35) mounted at the other end of the valve (34);

the turning mechanism (6) comprises:

the base (61) is fixedly connected to the inner wall of the vacuum chamber (1), a slide way (62) is arranged on the front side of the upper surface of the base (61), and the side wall of the fixed die (7) is rotatably connected with the front end of the inner side of the base (61) through a pin shaft;

a second hydraulic cylinder (63) mounted on the rear side of the upper surface of the base (61);

the sliding block (64) is embedded in the rear side of the inner cavity of the slide way (62) in a front-back sliding manner, and the rear side of the sliding block is fixedly connected with the output end of the second hydraulic cylinder (63);

one end of the connecting rod (65) is rotatably arranged on the inner side of the sliding block (64) through a pin shaft, and the other end of the connecting rod is rotatably connected with the top of the inner wall of the fixed die (7) through a pin shaft;

the cooling mechanism (9) includes:

the shell (91) is arranged at the output end of the first hydraulic oil cylinder (8), and the bottom of the shell is fixedly connected with the top of the movable die (10);

a moving assembly (92) disposed in the inner cavity of the housing (91);

and the driving assembly (93) is arranged at the central position of the upper surface of the shell (91).

2. The pressurized casting apparatus for gun steel casting according to claim 1, characterized in that: the moving assembly (92) comprises:

two sliding rods (921) are fixedly connected to the left end and the right end of the inner cavity of the shell (91) respectively;

the two moving plates (922) are slidably sleeved on the front side and the rear side of the outer wall of the sliding rod (921) respectively;

heating panel (923), install in the bottom of moving plate (922), and the shape semicircular in shape, pipeline (924) have been seted up to the inside of heating panel (923), and pipeline (924) lead to pipe and refrigerator (5) intercommunication.

3. The pressurized casting apparatus for gun steel casting according to claim 2, characterized in that: the pipeline (924) is arranged in the heat dissipation plate (923) in a snake shape.

4. The pressurized casting apparatus for gun steel casting according to claim 1, characterized in that: the drive assembly (93) comprises:

a motor (931) mounted at a central position of an upper surface of the housing (91);

a gear (932) mounted to an output end of the motor (931);

and two racks (933) are arranged, are respectively arranged on the tops of the two moving plates (922) and are meshed with the gears (932).

5. The pressurized casting apparatus for shot casting according to claim 4, wherein: the two racks (933) rotate 180 degrees relative to the central point of the gear (932) and coincide.

6. The pressurized casting equipment process for gun steel casting according to any one of claims 1-5, comprising the steps of:

step one, opening a cover plate (32), putting a steel ingot into a smelting furnace (33), closing the cover plate (32), sucking out gas in a vacuum chamber (1) by using a vacuum pump (4) to enable the vacuum chamber (1) to be in a vacuum state, smelting the steel ingot into molten steel through the smelting furnace (33), opening a valve (34), and enabling the molten steel to flow into a die cavity formed by a movable die (10) and a fixed die (7) along a drainage tube (35) to realize casting;

step two, the motor (931) is controlled to drive the gear (932) to rotate clockwise, the two heat dissipation plates (923) can move inwards and close through the cooperation of the gear (932), the rack (933) and the sliding rod (921), the heat dissipation plates are wrapped on the outer walls of the movable mold (10) and the fixed mold (7), the refrigerating machine (5) conveys cooling liquid into the pipeline (924), the heat dissipation plates (923) are cooled, the heat dissipation plates (923) can absorb heat brought to the movable mold (10) and the fixed mold (7) by molten steel, the molten steel shaping rate is improved, and the heated cooling liquid flows back into the refrigerating machine (5), so that the circulating refrigeration of the heat dissipation plates (923) is realized, the cooling efficiency of the molten steel is improved, and the purpose of blank material shaping is achieved;

step three, when the blank needs to be taken out, the motor (931) is controlled to drive the gear (932) to rotate anticlockwise, under the action of the rack (933), the movable plate (922) and the heat dissipation plate (923) move outwards, the heat dissipation plate (923) returns to the initial position, the door plate (2) is opened, the blank material containing equipment is moved to the bottom of the fixed die (7), the first hydraulic oil cylinder (8) is controlled to drive the shell (91) to move upwards, and then the movable die (10) moves upwards to be separated from the fixed die (7), blank materials in the fixed die (7) are exposed, the second hydraulic cylinder (63) is controlled to push the sliding block (64) to move towards the front side along the sliding way (62), the connecting rod (65) is promoted to push the rear side of the fixed die (7) upwards, the fixed die (7) overturns towards the front side, the blank materials are moved out of the fixed die (7) under the action of self gravity and fall on a containing device, and the cooled blank materials are taken out.

7. The pressurized casting equipment process for casting gun steel according to claim 6, wherein the process comprises the following steps: in the second step, the specific step that the two cooling plates (923) move inwards and close is that when the gear (932) rotates clockwise, the two racks (933) rotate 180 degrees relative to the central point of the gear (932) to coincide with each other, so that the two racks (933) move in opposite directions under the rotation action of the gear (932), the racks (933) are enabled to drive the moving plate (922) to move inwards, and the two cooling plates (923) move inwards synchronously.

Technical Field

The invention relates to the technical field of machining, in particular to pressurizing casting equipment and a pressurizing casting process for casting gun steel.

Background

The basic function of a gun barrel is to fire the projectile at a certain velocity to a designated location, and the barrel is therefore part of a gun-ammunition system containing the projectile and propellant charge. The gun barrel has extremely high requirements on materials, and the requirements on the refining of steel are remarkable, namely after the steel-making smelting is finished to form a blank, the blank is forged by a hammer bed, elements harmful to strength and toughness, such as sulfur, phosphorus and the like, remained in the steel are removed to meet the performance use requirements, the blank with impurities removed is remelted to form molten steel, pouring is finished in a vacuum environment, and bubbles are prevented from being generated in a bar cast in an atmospheric environment, so that the gun barrel is pressurized, and the compressive strength of the gun barrel is improved;

the gun barrel casting molding needs to consume a large amount of molten steel, so that the cooling can be completed only by standing for a long time, the casting efficiency is low, and the casting molding blank has huge quality, so that once the blank is not firmly grabbed when being taken out, the mold is easily damaged at the moment of falling, and therefore, a casting device which is flexible to use and has a cooling function needs to be provided.

Disclosure of Invention

The invention aims to provide pressurizing casting equipment and a pressurizing casting process for casting gun steel, which at least solve the problems that the prior art can not actively cool a mold after pouring is finished, the cooling time is long, the casting effect of a gun barrel is influenced, and the mold is easy to damage when a blank is taken out.

In order to achieve the purpose, the invention provides the following technical scheme: a pressurized casting equipment for casting gun steel, which comprises a vacuum chamber and a door plate, wherein the door plate can be arranged on the front side of the vacuum chamber in an opening and closing way, and the pressurized casting equipment also comprises: the smelting mechanism is arranged on the left side of the upper surface of the vacuum chamber; the vacuum pump is arranged in the middle of the upper surface of the vacuum chamber, and the air inlet is communicated with the top of the vacuum chamber through an air pipe; the refrigerator is arranged on the right side of the upper surface of the vacuum chamber; the two turnover mechanisms are respectively and fixedly connected to the bottoms of the left inner wall and the right inner wall of the vacuum chamber; the fixed die is arranged on the inner side of the turnover mechanism in a turnover manner; the two first hydraulic oil cylinders are respectively arranged on the left side and the right side of the top of the inner cavity of the vacuum chamber; the cooling mechanism is arranged at the output end of the first hydraulic oil cylinder, and a liquid outlet and a reflux port of the refrigerator are communicated with the cooling mechanism through water pipes; the movable die is arranged at the bottom end of the cooling mechanism, and the movable die and the fixed die are combined to form a die cavity;

the smelting mechanism comprises: the smelting box is arranged on the left side of the upper surface of the vacuum chamber; the cover plate is arranged at the top end of the smelting box in an openable and closable manner; the smelting furnace is arranged on the inner wall of the smelting box; one end of the valve is arranged at the bottom of the smelting furnace; the drainage tube is arranged at the other end of the valve;

the turnover mechanism comprises: the base is fixedly connected to the inner wall of the vacuum chamber, a slide way is arranged on the front side of the upper surface of the base, and the side wall of the fixed die is rotatably connected with the front end of the inner side of the base through a pin shaft; the second hydraulic oil cylinder is arranged on the rear side of the upper surface of the base; the sliding block can be embedded in the rear side of the inner cavity of the slideway in a front-back sliding manner, and the rear side of the sliding block is fixedly connected with the output end of the second hydraulic cylinder; one end of the connecting rod is rotatably arranged on the inner side of the sliding block through a pin shaft, and the other end of the connecting rod is rotatably connected with the top of the inner wall of the fixed die through a pin shaft;

the cooling mechanism includes: the shell is arranged at the output end of the first hydraulic oil cylinder, and the bottom of the shell is fixedly connected with the top of the movable die; the moving assembly is arranged in the inner cavity of the shell; and the driving assembly is arranged at the central position of the upper surface of the shell.

Preferably, the moving assembly includes: the two sliding rods are respectively and fixedly connected to the left end and the right end of the inner cavity of the shell; the two moving plates are respectively sleeved on the front side and the rear side of the outer wall of the sliding rod in a sliding manner; the heat dissipation plate is installed at the bottom end of the moving plate and is semicircular in shape, a pipeline is arranged inside the heat dissipation plate, and the pipeline is communicated with the refrigerator through a water pipe.

Preferably, the pipes are arranged in a serpentine shape inside the heat dissipation plate.

Preferably, the driving assembly includes: the motor is arranged at the center of the upper surface of the shell; the gear is arranged at the output end of the motor; and the number of the racks is two, the racks are respectively arranged at the tops of the two moving plates and are meshed and connected with the gears.

Preferably, the two racks rotate 180 degrees relative to the central point of the gear to coincide.

The equipment process comprises the following steps:

opening a cover plate, putting a steel ingot into a smelting furnace, closing the cover plate, sucking out gas in a vacuum chamber by using a vacuum pump to enable the vacuum chamber to reach a vacuum state, smelting the steel ingot into molten steel through the smelting furnace, opening a valve, and enabling the molten steel to flow into a die cavity formed by a movable die and a fixed die along a drainage pipe to realize casting;

step two, controlling a motor to drive a gear to rotate clockwise, enabling two heat dissipation plates to move inwards and close through the matching of the gear, a rack and a sliding rod, wrapping the heat dissipation plates on the outer walls of a movable die and a fixed die, conveying cooling liquid into a pipeline by a refrigerator, cooling the heat dissipation plates, enabling the heat dissipation plates to absorb the heat of the molten steel belt to the movable die and the fixed die, improving the shaping rate of the molten steel, and enabling the heated cooling liquid to flow back into the refrigerator, so that the circulating refrigeration of the heat dissipation plates is realized, the cooling efficiency of the molten steel is improved, and the purpose of blank material molding is further achieved;

and step three, when the blank needs to be taken out, controlling a motor to drive a gear to rotate anticlockwise, moving the moving plate and the heat dissipation plate to move outwards under the action of the rack, enabling the heat dissipation plate to return to an initial position, opening the door plate, moving the blank containing equipment to the bottom of the fixed die, controlling a first hydraulic oil cylinder to drive the shell to move upwards, enabling the movable die to move upwards to be separated from the fixed die, exposing the blank in the fixed die, controlling a second hydraulic oil cylinder to push the sliding block to move towards the front side along the slide way, enabling the connecting rod to push the rear side of the fixed die upwards, turning the fixed die towards the front side, enabling the blank to move out of the fixed die under the action of self gravity to fall on the containing equipment, and taking out the cooled blank.

Preferably, the specific step of moving and closing the two heat dissipation plates inwards in the second step is that when the gear rotates clockwise, because the rotation degrees of the two racks relative to the central point of the gear coincide, the two racks move in opposite directions under the rotation action of the gear, so that the racks can drive the moving plate to move inwards, and the two heat dissipation plates move inwards synchronously.

The invention provides pressurizing casting equipment and process for casting gun steel, which have the beneficial effects that:

1. according to the invention, steel ingots can be smelted into molten steel through the smelting mechanism, the molten steel is poured into a die cavity formed by the fixed die and the movable die to realize pouring, the movable plate in the movable assembly can move inwards along the slide rod through the driving assembly, and then the two heat dissipation plates are clamped on the outer walls of the fixed die and the movable die in a wrapping manner, on the basis of refrigeration of the refrigerator, the heat dissipation plates are cooled by cooling liquid flowing in the pipeline, so that the heat dissipation plates absorb heat brought by the molten steel, thus the active cooling of the fixed die and the movable die is realized, and the casting efficiency is improved;

2. according to the invention, the second hydraulic cylinder drives the sliding block to move towards the front side along the slide way, the fixed die can be overturned towards the front side by utilizing the pushing action of the connecting rod, and the shaped blank material can fall out, so that the blank material can be taken out without any equipment, the fixed die is prevented from being damaged, and the casting safety is greatly improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front sectional view of the present invention;

FIG. 3 is a right side sectional view of the turnover mechanism of the present invention;

FIG. 4 is a right side sectional view of the cooling mechanism of the present invention;

fig. 5 is a top view of the gear and rack combination of the present invention.

In the figure: 1. vacuum chamber, 2, door plant, 3, smelt the mechanism, 31, smelt the case, 32, apron, 33, smelting furnace, 34, valve, 35, drainage tube, 4, vacuum pump, 5, refrigerator, 6, tilting mechanism, 61, base, 62, slide, 63, second hydraulic cylinder, 64, slider, 65, connecting rod, 7, cover half, 8, first hydraulic cylinder, 9, cooling body, 91, shell, 92, removal subassembly, 921, slide bar, 922, movable plate, 923, heating panel, 924, pipeline, 93, drive assembly, 931, motor, 932, gear, 933, rack, 10, movable mould.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a pressurizing casting device for casting gun steel comprises a vacuum chamber 1 and a door plate 2, wherein the door plate 2 can be installed on the front side of the vacuum chamber 1 in an opening and closing manner, the pressurizing casting device also comprises a smelting mechanism 3, a vacuum pump 4, a refrigerator 5, a turnover mechanism 6, a fixed die 7, a first hydraulic oil cylinder 8, a cooling mechanism 9 and a movable die 10, the smelting mechanism 3 is installed on the left side of the upper surface of the vacuum chamber 1, the vacuum pump 4 is installed in the middle of the upper surface of the vacuum chamber 1, an air inlet is communicated with the top of the vacuum chamber 1 through an air pipe, air in the vacuum chamber 1 is sucked out through the vacuum pump 4, the vacuum state in the vacuum chamber 1 is achieved, the refrigerator 5 is installed on the right side of the upper surface of the vacuum chamber 1 and used for providing refrigerated cooling liquid, the turnover mechanisms 6 are two in number and are respectively and fixedly connected to the bottoms of the left inner wall and the right inner wall of the vacuum chamber 1, the fixed die 7 is arranged on the inner side of the turnover mechanism 6 in a turnover manner, and the first hydraulic oil cylinder 8 is two in number, the cooling mechanism 9 is arranged at the output end of the first hydraulic oil cylinder 8, a liquid outlet and a return port of the refrigerator 5 are communicated with the cooling mechanism 9 through water pipes, the movable die 10 is arranged at the bottom end of the cooling mechanism 9, and the movable die 10 and the fixed die 7 are combined to form a die cavity;

the smelting mechanism 3 comprises a smelting box 31, a cover plate 32, a smelting furnace 33, a valve 34 and a drainage pipe 35, wherein the smelting box 31 is installed on the left side of the upper surface of the vacuum chamber 1, the cover plate 32 is installed at the top end of the smelting box 31 in an openable and closable manner, the smelting furnace 33 is installed on the inner wall of the smelting box 31, the steel ingots subjected to impurity removal are smelted into molten steel through the smelting furnace 33, one end of the valve 34 is installed at the bottom of the smelting furnace 33, and the drainage pipe 35 is installed at the other end of the valve 34;

the turnover mechanism 6 comprises a base 61, a slide way 62, a second hydraulic cylinder 63, a slide block 64 and a connecting rod 65, wherein the base 61 is fixedly connected to the inner wall of the vacuum chamber 1, the slide way 62 is arranged on the front side of the upper surface of the base 61 and limits the slide block 64 to ensure that the slide block 64 can horizontally move back and forth, the side wall of the fixed die 7 is rotatably connected with the front end of the inner side of the base 61 through a pin shaft, the second hydraulic cylinder 63 is arranged on the rear side of the upper surface of the base 61 and drives the slide block 64 to move back and forth through the second hydraulic cylinder 63, the slide block 64 is embedded in the rear side of the inner cavity of the slide way 62 in a front and back sliding manner, the rear side of the slide block is fixedly connected with the output end of the second hydraulic cylinder 63, one end of the connecting rod 65 is rotatably arranged on the inner side of the slide block 64 through a pin shaft, the other end of the connecting rod 65 is rotatably connected with the top of the inner wall of the fixed die 7 through a pin shaft, and the connecting rod 65 is used for supporting and drawing the moving die 10;

the cooling mechanism 9 comprises a shell 91, a moving assembly 92 and a driving assembly 93, wherein the shell 91 is installed at the output end of the first hydraulic oil cylinder 8, the bottom of the shell 91 is fixedly connected with the top of the movable die 10, the moving assembly 92 is arranged in an inner cavity of the shell 91, and the driving assembly 93 is installed at the center position of the upper surface of the shell 91.

As the preferred scheme, furthermore, removal subassembly 92 includes slide bar 921, movable plate 922, heat dissipation plate 923 and pipeline 924, slide bar 921 quantity is two, both ends about the inner chamber of difference fixed connection in shell 91, it is spacing to movable plate 922, it can drive heat dissipation plate 923 horizontal migration to ensure movable plate 922, movable plate 922 quantity is two, cup joint both sides around the outer wall of slide bar 921 slidable respectively, heat dissipation plate 923 is installed in the bottom of movable plate 922, and the shape is semicircular, when heat dissipation plate 923 contacts with movable mould 10 and cover half 7, can absorb the heat on movable mould 10 and the cover half 7, pipeline 924 has been seted up to the inside of heat dissipation plate 923, and pipeline 924 leads to pipe and refrigerator 5 intercommunication, pipeline 924 is the inside of snakelike arranging at heat dissipation plate 923, enlarge the area of contact between heat dissipation plate 923 and the coolant liquid, the cooling effect to heat dissipation plate 923 is better.

Preferably, the driving assembly 93 includes a motor 931, a gear 932 and two racks 933, the motor 931 is installed at the central position of the upper surface of the housing 91, the gear 932 is installed at the output end of the motor 931, the number of the racks 933 is two, the two racks 933 are respectively installed at the tops of the two moving plates 922 and are meshed with the gear 932, the two racks 933 are rotated 180 degrees relative to the central point of the gear 932 to be overlapped, the two racks 933 can be moved reversely, and when the gear 932 is rotated clockwise or counterclockwise, the two racks 933 can be moved inward or outward at the same time.

A pressurized casting equipment process for casting gun steel comprises the following steps:

step one, opening a cover plate 32, putting a steel ingot into a smelting furnace 33, closing the cover plate 32, sucking out gas in a vacuum chamber 1 by using a vacuum pump 4 to ensure that the vacuum chamber 1 is in a vacuum state, smelting the steel ingot into molten steel through the smelting furnace 33, opening a valve 34, and enabling the molten steel to flow into a die cavity formed by a movable die 10 and a fixed die 7 along a drainage tube 35 to realize casting;

step two, the motor 931 is controlled to drive the gear 932 to rotate clockwise, the two heat dissipation plates 923 can move inwards and close through the cooperation of the gear 932, the rack 933 and the slide bar 921 and are wrapped on the outer walls of the movable mold 10 and the fixed mold 7, the refrigerating machine 5 conveys cooling liquid into the pipeline 924 to cool the heat dissipation plates 923, the heat dissipation plates 923 can absorb heat brought to the movable mold 10 and the fixed mold 7 by molten steel, the molten steel shaping rate is improved, and the heated cooling liquid flows back into the refrigerating machine 5, so that the circulating refrigeration of the heat dissipation plates 923 is realized, the cooling efficiency of the molten steel is improved, and the purpose of blank material shaping is achieved;

step three, when the blank needs to be taken out, the control motor 931 drives the gear 932 to rotate anticlockwise, the moving plate 922 and the heat dissipation plate 923 move outwards under the action of the rack 933, the heat dissipation plate 923 returns to the initial position, the door panel 2 is opened, the blank containing equipment moves to the bottom of the fixed die 7, the first hydraulic oil cylinder 8 is controlled to drive the shell 91 to move upwards, the movable die 10 is further made to move upwards to be separated from the fixed die 7, the blank in the fixed die 7 is exposed, the second hydraulic oil cylinder 63 is controlled to push the sliding block 64 to move towards the front side along the sliding way 62, the connecting rod 65 is made to push the rear side of the fixed die 7 upwards, the fixed die 7 is turned over towards the front side, the blank is moved out of the fixed die 7 under the action of self gravity and falls on the pressure oil containing equipment, and the cooled blank is taken out.

Preferably, in the second step, the specific step of moving and closing the two heat-dissipating plates 923 inward is that when the gear 932 rotates clockwise, the two racks 933 rotate 180 degrees relative to the central point of the gear 932 and overlap with each other, so that the two racks 933 move in opposite directions under the rotation of the gear 932, and the rack 933 is prompted to drive the moving plate 922 to move inward, thereby achieving the synchronous inward movement of the two heat-dissipating plates 923.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.