阅读说明：本技术 球墨铸铁注塑机固定板的制备方法 (Preparation method of nodular cast iron injection molding machine fixing plate ) 是由 吴景泉 孙亮 艾家贵 于 2020-05-29 设计创作，主要内容包括：球墨铸铁注塑机固定板的制备方法,包括S1、合模：驱动上模板向下运动与下模板配合,所述下模板的型块伸入到上模板的型腔内,所述上模板抵触于下模板的阶梯槽上；拉杆孔定型机构动作就位；S2、浇注：S3、冷却成型：S4、脱模：本发明在轴孔砂芯、空心槽砂芯均设计有单独的排气孔,可使得轴孔砂芯、各个空心槽砂芯在浇注过程中产生的气体均可排出,从而有效的提高了轴孔、空心槽的加工精度,避免轴孔、空心槽处出现气孔；拉杆孔定型机构一方面可作为拉杆孔的隔离成型部件,另一方面可作为注塑机固定板与上模板、下模板的定位部件。(The preparation method of the nodular cast iron injection molding machine fixing plate comprises the following steps of S1: the upper template is driven to move downwards to be matched with the lower template, a molding block of the lower template extends into a cavity of the upper template, and the upper template is abutted against a stepped groove of the lower template; the pull rod hole shaping mechanism acts in place; s2, pouring: s3, cooling and forming: s4, demolding: according to the invention, the shaft hole sand core and the hollow groove sand core are respectively provided with the independent exhaust holes, so that gas generated in the casting process of the shaft hole sand core and each hollow groove sand core can be exhausted, the processing precision of the shaft hole and the hollow groove is effectively improved, and the air holes at the shaft hole and the hollow groove are avoided; the pull rod hole shaping mechanism can be used as an isolation forming part of the pull rod hole on one hand, and can be used as a positioning part of a fixing plate, an upper template and a lower template of the injection molding machine on the other hand.)

1. The preparation method of the nodular cast iron injection molding machine fixing plate is characterized by comprising the following steps: the preparation method comprises the following steps:

s1, mold closing: the upper template is driven to move downwards to be matched with the lower template, a molding block of the lower template extends into a cavity of the upper template, and the upper template is abutted against a stepped groove of the lower template; the pull rod hole shaping mechanism acts in place;

s2, pouring: pouring molten nodular cast iron into the cavity, wherein in the pouring process, gas generated by the shaft hole sand core and the hollow groove sand core in the cavity is discharged through the vent holes in the top of the cavity respectively, and the gas in the cavity is discharged through the vent holes in the cavity;

s3, cooling and forming: the injection molding machine fixing plate is solidified and molded, the shaft hole sand core isolates a shaft hole in the center of the injection molding machine fixing plate, the hollow groove sand core isolates a hollow groove in the injection molding machine fixing plate, and the pull rod hole shaping mechanism isolates pull rod holes at four corners of the injection molding machine fixing plate;

s4, demolding: the pull rod hole shaping mechanism is separated from the upper template; the upper template moves upwards to separate the upper template from a fixed plate of the injection molding machine, and the fixed plate of the injection molding machine is arranged on the molding block; the pull rod hole shaping mechanism is separated from the injection molding machine fixing plate, and the injection molding machine fixing plate is pushed away.

2. The method for preparing the fixing plate of the nodular cast iron injection molding machine according to claim 1, wherein the method comprises the following steps: in S2, the tie rod hole shaping mechanism is specifically actuated: the pneumatic rod drives the fixed plate to move upwards, the fixed plate drives the shaping rods at the four corners of the top surface of the fixed plate to move upwards, and the shaping rods slide to penetrate through the shaping blocks until the shaping rods penetrate through the cavities and the top ends of the shaping rods are embedded into the upper template.

3. The method for preparing the fixing plate of the nodular cast iron injection molding machine according to claim 1, wherein the method comprises the following steps: the upper template and the shaft hole sand core are oppositely provided with a shaft hole sand core exhaust hole, the top end of the shaft hole sand core exhaust hole is an opening, the bottom end of the shaft hole sand core exhaust hole is sunk into the shaft hole sand core, and gas in the shaft hole sand core is exhausted through the shaft hole sand core exhaust hole.

4. The method for preparing the fixing plate of the nodular cast iron injection molding machine according to claim 1 or 3, wherein the method comprises the following steps: the upper template and the hollow groove sand core are oppositely provided with hollow groove sand core exhaust holes, the top ends of the hollow groove sand core exhaust holes are openings, the bottom ends of the hollow groove sand core exhaust holes are sunk into the hollow groove sand core, and gas in the hollow groove sand core is exhausted through the hollow groove sand core exhaust holes.

5. The method for preparing the fixing plate of the nodular cast iron injection molding machine according to claim 1, wherein the method comprises the following steps: the bottom end of the shaft hole sand core is provided with a core head, and the core head is embedded into the center of the lower template.

6. The method for preparing the fixing plate of the nodular cast iron injection molding machine according to claim 5, wherein the method comprises the following steps: the bottom of the shaft hole sand core is provided with a baffle ring, the baffle ring is positioned outside the core head at intervals, and the baffle ring is embedded into the lower template.

Technical Field

The invention belongs to the technical field of processing of injection molding machine fixing plates, and particularly relates to a preparation method of a nodular cast iron injection molding machine fixing plate.

Background

Three-plate mold clamping mechanisms of injection molding machines generally comprise three mold plates for fixing and opening and closing molds, namely a fixed mold plate (also called a head plate), a movable mold plate (also called a second plate) and an adjustable mold plate (also called a tail plate);

the fixed template is provided with a plurality of hollow grooves and shaft holes, so that the pouring process of the fixed template is troublesome; in the current injection molding machine fixed plate pouring process, the hollow groove psammitolite, lack exhaust structure on the shaft hole psammitolite, the hollow groove that leads to preparing, shaft hole department has the gas pocket, and because the hollow groove psammitolite, shaft hole psammitolite number is more, the adhesion strength of fused injection molding machine fixed plate and hollow groove psammitolite is greater than the adhesion strength of fused injection molding machine fixed plate and shaft hole psammitolite, when leading to the drawing of patterns, the injection molding machine fixed plate can with the cope match-plate pattern upward movement, need the manual work to peel off again, make the drawing.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a preparation method of a nodular cast iron injection molding machine fixing plate, which has the following specific technical scheme:

the preparation method of the fixing plate of the nodular cast iron injection molding machine comprises the following steps:

s1, mold closing: the upper template is driven to move downwards to be matched with the lower template, a molding block of the lower template extends into a cavity of the upper template, and the upper template is abutted against a stepped groove of the lower template; the pull rod hole shaping mechanism acts in place;

s2, pouring: pouring molten nodular cast iron into the cavity, wherein in the pouring process, gas generated by the shaft hole sand core and the hollow groove sand core in the cavity is discharged through the vent holes in the top of the cavity respectively, and the gas in the cavity is discharged through the vent holes in the cavity;

s3, cooling and forming: the injection molding machine fixing plate is solidified and molded, the shaft hole sand core isolates a shaft hole in the center of the injection molding machine fixing plate, the hollow groove sand core isolates a hollow groove in the injection molding machine fixing plate, and the pull rod hole shaping mechanism isolates pull rod holes at four corners of the injection molding machine fixing plate;

s4, demolding: the pull rod hole shaping mechanism is separated from the upper template; the upper template moves upwards to separate the upper template from a fixed plate of the injection molding machine, and the fixed plate of the injection molding machine is arranged on the molding block; the pull rod hole shaping mechanism is separated from the injection molding machine fixing plate, and the injection molding machine fixing plate is pushed away.

Further, in S2, the tie rod hole shaping mechanism is specifically actuated to: the pneumatic rod drives the fixed plate to move upwards, the fixed plate drives the shaping rods at the four corners of the top surface of the fixed plate to move upwards, and the shaping rods slide to penetrate through the shaping blocks until the shaping rods penetrate through the cavities and the top ends of the shaping rods are embedded into the upper template.

Furthermore, the upper template and the shaft hole sand core are oppositely provided with a shaft hole sand core exhaust hole, the top end of the shaft hole sand core exhaust hole is an opening, the bottom end of the shaft hole sand core exhaust hole is sunk into the shaft hole sand core, and gas in the shaft hole sand core is exhausted through the shaft hole sand core exhaust hole.

Furthermore, the upper template and the hollow groove sand core are oppositely provided with hollow groove sand core exhaust holes, the top ends of the hollow groove sand core exhaust holes are provided with openings, the bottom ends of the hollow groove sand core exhaust holes are sunk into the hollow groove sand core, and gas in the hollow groove sand core is exhausted through the hollow groove sand core exhaust holes.

Furthermore, the bottom end of the shaft hole sand core is provided with a core head, and the core head is embedded in the center of the lower template.

Furthermore, the bottom end of the shaft hole sand core is provided with a baffle ring, the baffle ring is positioned outside the core head at intervals, and the baffle ring is embedded into the lower template.

The invention has the beneficial effects that:

1. the shaft hole sand core and the hollow groove sand core are respectively provided with an independent exhaust hole, so that gas generated in the casting process of the shaft hole sand core and each hollow groove sand core can be exhausted, the processing precision of the shaft hole and the hollow groove is effectively improved, and air holes are prevented from being formed in the shaft hole and the hollow groove;

2. the design that the mold block is convexly embedded into the mold cavity can enable a fixed plate of the injection molding machine which is processed and molded to be arranged on the convex mold block, and stepped grooves are formed around the fixed plate of the injection molding machine, so that the periphery of the fixed plate of the injection molding machine is free from blocking, and the fixed plate of the injection molding machine can be conveniently and quickly blanked;

3. the pull rod hole shaping mechanism can be used as an isolation forming part of the pull rod hole on one hand, and can be used as a positioning part of a fixing plate, an upper template and a lower template of the injection molding machine on the other hand.

Drawings

FIG. 1 shows a schematic structural diagram of a fixing plate of the nodular cast iron injection molding machine of the invention;

FIG. 2 is a schematic structural diagram of a fixed plate pouring device of the injection molding machine of the invention;

FIG. 3 shows a schematic diagram of an upper plate structure of the present invention;

FIG. 4 shows an enlarged schematic view of FIG. 2 at A;

shown in the figure: 1. a fixed plate main body; 11. a draw bar hole; 12. a hollow groove; 13. a shaft hole; 2. mounting a template; 21. a pouring hole; 22. a cavity vent hole; 23. the shaft hole sand core is provided with an exhaust hole; 24. a hollow groove sand core vent hole; 25. a cavity; 3. a shaft hole sand core; 31. a core print; 32. a baffle ring; 4. a hollow slot core; 5. a pull rod hole shaping mechanism; 51. a sizing rod; 52. a fixing plate; 53. a pneumatic rod; 6. a lower template; 61. and (7) molding blocks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The preparation method of the fixing plate of the nodular cast iron injection molding machine comprises the following steps:

s1, mold closing: the upper template 2 is driven to move downwards to be matched with the lower template 6, a molding block 61 of the lower template 6 extends into a cavity of the upper template 2, and the upper template 2 is abutted against a stepped groove of the lower template 6; the pull rod hole shaping mechanism 5 acts in place; the design that the mold block 61 is convexly embedded into the mold cavity 25 can enable a fixed plate of the injection molding machine which is processed and molded to be arranged on the convex mold block, and stepped grooves are formed around the fixed plate of the injection molding machine, so that the periphery of the fixed plate of the injection molding machine is free from blocking, and the fixed plate of the injection molding machine can be rapidly fed;

s2, pouring: the molten ductile cast iron liquid is poured into the cavity 25, in the pouring process, gas generated by the shaft hole sand core 3 and the hollow groove sand core 4 in the cavity 25 is discharged through the vent holes at the top of the cavity respectively, and gas in the cavity 25 is discharged through the cavity vent holes 22; the shaft hole sand core 3 and the hollow groove sand core 4 are respectively provided with an independent exhaust hole, so that gas generated in the casting process of the shaft hole sand core 3 and each hollow groove sand core 4 can be exhausted, the processing precision of the shaft hole and the hollow groove is effectively improved, and air holes are prevented from being formed in the shaft hole and the hollow groove;

s3, cooling and forming: the injection molding machine fixing plate is solidified and molded, the shaft hole sand core 3 isolates a shaft hole 13 in the center of the injection molding machine fixing plate, the hollow groove sand core 4 isolates a hollow groove 12 in the injection molding machine fixing plate, and the pull rod hole shaping mechanism 5 isolates pull rod holes 11 at four corners of the injection molding machine fixing plate; the shaft hole sand core 3, the hollow groove sand core 4 and the pull rod hole shaping mechanism 5 are utilized to stably process the shaft hole, the hollow groove and the pull rod hole;

s4, demolding: the pull rod hole shaping mechanism 5 is separated from the upper template 2; the upper template 2 moves upwards to separate the upper template 2 from the injection molding machine fixing plate, and the injection molding machine fixing plate is arranged on the molding block 61; the pull rod hole shaping mechanism 5 is separated from the injection molding machine fixing plate, and the injection molding machine fixing plate is pushed away; during demolding, the pull rod hole shaping mechanism 5 is separated from the upper template 2, so that the upper template 2 can be quickly and stably separated from the lower template 6, the adhesion strength of the injection molding machine fixing plate and the pull rod hole shaping mechanism 5 is improved, the injection molding machine fixing plate is prevented from moving upwards along with the upper template 2, and the injection molding machine fixing plate is ensured to be stably arranged on the lower template 6; after the upper template 2 is separated, the pull rod hole shaping mechanism 5 is separated from the injection molding machine fixing plate, so that the injection molding machine fixing plate can be quickly separated from the lower template; the demoulding and blanking efficiency is effectively improved;

as an improvement of the above technical solution, in S2, the pull rod hole shaping mechanism 5 specifically operates to: the pneumatic rod 53 drives the fixed plate 52 to move upwards, the fixed plate 52 drives the shaping rods 51 at the four corners of the top surface of the fixed plate to move upwards, and the shaping rods 51 slide to penetrate through the shaping block 61 until the shaping rods 51 penetrate through the cavity 25 and the top ends of the shaping rods 51 are embedded into the upper template 2; the pneumatic rod 53 can drive the fixed plate 52 to move up and down, and the fixed plate 52 can drive each shaping rod 51 to move synchronously, so that the shaping rods 51 can move up and down quickly; the shaping rod 51 can be used as an isolation molding part of the pull rod hole 11 on one hand, and can be used as a positioning part of the injection molding machine fixing plate, the upper template 2 and the lower template 6 on the other hand.

As an improvement of the technical scheme, the upper template 2 and the shaft hole sand core 3 are oppositely provided with a shaft hole sand core exhaust hole 23, the top end of the shaft hole sand core exhaust hole 23 is an opening, the bottom end of the shaft hole sand core exhaust hole 23 is sunk into the shaft hole sand core 3, and the gas in the shaft hole sand core 3 is exhausted through the shaft hole sand core exhaust hole 23; the gas generated by the shaft hole sand core 3 in the pouring process can be rapidly discharged by utilizing the shaft hole sand core exhaust holes 23, so that the gas is prevented from overflowing into the cavity, and the preparation effect of the shaft hole is improved.

As an improvement of the technical scheme, the upper template 2 and the hollow slot sand core 4 are oppositely provided with a hollow slot sand core exhaust hole 24, the top end of the hollow slot sand core exhaust hole 24 is an opening, the bottom end of the hollow slot sand core exhaust hole is sunk into the hollow slot sand core 4, and the gas in the hollow slot sand core 4 is exhausted through the hollow slot sand core exhaust hole 24; the gas generated in the casting of the hollow slot sand core 4 can be rapidly discharged by utilizing the hollow slot sand core exhaust hole 24, so that the gas is prevented from overflowing into the cavity, and the preparation effect of the hollow slot is improved.

As an improvement of the technical scheme, the bottom end of the shaft hole sand core 3 is provided with a core head 31, and the core head 31 is embedded in the center of the lower template 6; the matching of the core head 31 and the lower template 6 can improve the assembly precision of the shaft hole sand core 3 and the lower template 6.

As an improvement of the above technical scheme, the bottom end of the shaft hole sand core 3 is provided with a baffle ring 32, the baffle ring 32 is positioned outside the core head 31 at intervals, and the baffle ring 32 is embedded in the lower template 6; the baffle ring 32 can improve the matching sealing effect of the core print and the lower template, and can further improve the core print supporting effect.

As shown in fig. 1, fig. 1 shows a schematic structural view of a fixing plate of the nodular cast iron injection molding machine of the invention;

a step-shaped shaft hole 13 is formed in the center of the fixing plate main body 1; the lateral section of the fixing plate body 1 is conical, the normal section of the fixing plate body 1 is square, 8 hollow grooves 12 are formed in the outer wall of the fixing plate body 1, two hollow grooves 12 are formed in each edge, pull rod holes 11 are formed in four corners of the fixing plate body 1, and standing legs are symmetrically arranged on the bottom surface of the fixing plate body 1.

As shown in fig. 2, fig. 2 is a schematic structural diagram of a fixed plate pouring device of an injection molding machine according to the present invention;

a cavity 25 is formed in the upper template 2, the cavity 25 is of a bottom opening structure, and a shaft hole sand core 3 and a plurality of hollow groove sand cores 4 which are of a stepped structure are arranged on the inner wall of the cavity 25; the bottom surface of the shaft hole sand core 3 is provided with a core head 31 and baffle rings 32, and the baffle rings 32 are arranged outside the core head 31 at intervals;

a hollow groove sand core exhaust hole 24, a shaft hole sand core exhaust hole 23, a pouring hole 21 and a cavity exhaust hole 22 which are vertically and downwardly arranged are formed in the upper template 2, the shaft hole sand core exhaust hole 23 extends into the shaft hole sand core 3, and the hollow groove sand core exhaust hole 24 extends into the hollow groove sand core 4;

the top protruding block of the lower template 6 is a mould block 61, and the mould block 61 extends into the cavity 25;

a shaping rod 51 penetrates through the lower template 6 in a sliding manner, the shaping rod 51 penetrates through the cavity 25, and the top end of the shaping rod extends into the upper template 2; the shaping rods 51 are positioned at the four inner corners of the cavity; the shaping rod 51 is vertically arranged on the fixed plate 52, the two ends of the fixed plate 52 are connected with pneumatic rods 53, and the pneumatic rods 53 are positioned on the lower template.

As shown in fig. 4, fig. 4 shows an enlarged schematic structure at a of fig. 2;

the bottom end of the shaft hole sand core 3 is provided with a core head 31 and a baffle ring 32, the baffle ring 32 is arranged outside the core head 31 at intervals, and the core head 31 and the baffle ring 32 are embedded in the lower template 6.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.