阅读说明：本技术 一种避免硬胶料头弹飞的顶出结构 (Ejection structure for preventing hard rubber material head from bouncing off ) 是由 邓联坤 于 2020-05-04 设计创作，主要内容包括：本发明提供了一种避免硬胶料头弹飞的顶出结构,包括：模仁、模板和顶出板,所述模仁的顶面设有牛角浇口,所述牛角浇口包括直线部分和弧形部分：顶出入子,所述顶出入子沿垂直于所述模仁的方向可滑动地穿设于所述模仁；所述直线部分经过所述顶出入子的位置；所述顶出入子的顶面对应所述直线部分的位置凹陷有第一凹槽；所述第一凹槽的底面还具有柱状容腔；顶针,所述顶针穿设于所述模板,所述顶针的上端与所述顶出入子连接,所述顶针的下端与所述顶出板固定连接。本发明的有益效果是,这种避免硬胶料头弹飞的顶出结构在顶出入子上设有柱状容腔,对料头起到限位的作用,在顶出硬胶料头的时候能够阻止料头弹飞。(The invention provides an ejection structure for preventing a hard rubber head from bouncing off, which comprises: mould benevolence, template and liftout plate, the top surface of mould benevolence is equipped with the ox horn runner, the ox horn runner includes linear part and arc part: the top access device can be slidably arranged in the mold core in a penetrating way along the direction vertical to the mold core; the straight line part passes through the position of the top access sub; a first groove is recessed in the position, corresponding to the linear part, of the top surface of the top nut; the bottom surface of the first groove is also provided with a columnar cavity; the ejector pins penetrate through the template, the upper ends of the ejector pins are connected with the ejector pins, and the lower ends of the ejector pins are fixedly connected with the ejector plate. The ejection structure for preventing the hard rubber stub bar from flying has the advantages that the columnar containing cavity is arranged on the ejection insert, so that the stub bar is limited, and the stub bar can be prevented from flying when the hard rubber stub bar is ejected.)

1. The utility model provides an avoid ejecting structure that ebonite stub bar bullet flies, includes mould benevolence, template and liftout plate, the top surface of mould benevolence is equipped with the ox horn runner, the ox horn runner includes linear portion and arc part, the one end of arc part with the one end intercommunication of linear portion, its characterized in that still includes:

the top access device can be slidably arranged in the mold core in a penetrating way along the direction vertical to the mold core;

the straight line part passes through the position of the top access sub; a first groove is recessed in the position, corresponding to the linear part, of the top surface of the top nut;

the bottom surface of the first groove is also provided with a columnar cavity; the length direction of the columnar cavity is vertical to the mold core;

the ejector pins penetrate through the template, the upper ends of the ejector pins are connected with the ejector pins, and the lower ends of the ejector pins are fixedly connected with the ejector plate.

2. The ejection structure for preventing the hard rubber head from flying off as claimed in claim 1, wherein:

a first through hole is formed in the top access nut, the upper end of the first through hole penetrates through the bottom surface of the first groove, and the lower end of the first through hole penetrates through the bottom surface of the top access nut;

the upper end of the thimble extends into the first through hole and is tightly matched with the first through hole;

the upper end of the ejector pin is located between the upper end and the lower end of the first through hole, and the inner wall of the first through hole and the upper end of the ejector pin enclose a columnar cavity.

3. The ejection structure for preventing the hard rubber head from flying off as claimed in claim 2, wherein:

the upper end of the thimble gradually shrinks to form a protruding part with a small upper part and a big lower part.

4. The ejection structure for preventing the hard rubber head from flying off as claimed in claim 3, wherein:

the top surface of the die core is also provided with a runner; the top surface of the top access seed is provided with a second groove corresponding to the position of the branch channel;

the first groove is crossed with the second groove, and the upper end of the first through hole penetrates through the crossed part of the first groove and the second groove.

5. The ejection structure for preventing the hard rubber head from flying off as claimed in claim 4, wherein:

the top surface of the template is recessed with a recessed part, and the mold core is positioned in the recessed part;

a boss is also protruded on the side wall of the top nut; the boss is arranged close to the bottom of the top nut;

the bottom surface of the depressed part is provided with a blind hole which is suitable for accommodating the top access nut and the boss to slide along the direction vertical to the die core, and one part of the top access nut and the boss are positioned in the blind hole.

6. The ejection structure for preventing the hard rubber head from flying off as claimed in claim 5, wherein:

and a gap is reserved between the inner wall of the blind hole and the jacking rotor and between the inner wall of the blind hole and the boss.

7. The ejection structure for preventing the hard rubber head from flying off as claimed in claim 6, wherein:

the top access nut is in a regular quadrangular prism shape;

the die core is provided with a second through hole, and the length direction of the second through hole is vertical to the die core; the second through hole is a square hole matched with the shape of the top access nut; the top access sub is tightly matched and can be slidably inserted into the second through hole;

and a chamfer is arranged on the side edge of the top nut.

[ technical field ] A method for producing a semiconductor device

The invention relates to a stub bar ejection structure, in particular to an ejection structure for preventing a hard rubber stub bar from bouncing off.

[ background of the invention ]

Referring to fig. 1, in the production process, a product 6 is molded by using hard glue through a plastic mold, and the glue is fed through a horn gate 101, and the hard glue feeding point is close to the outer side of the molding cavity.

The stub bar 7 is formed in the ox horn gate 101 after the hard rubber is solidified, when the stub bar 7 is ejected out, the stub bar 7 can be pulled out of the ox horn gate 101, and in the process that the stub bar 7 is pulled out of the ox horn gate 101, the stub bar 7 can deform to cause the stub bar 7 to fly in an elastic mode. In mass production, the flying of the stub bar 7 is not beneficial to the recovery of the stub bar 7.

Therefore, there is a need for improvements in the prior art.

[ summary of the invention ]

The technical problem to be solved by the invention is as follows: the problem that the stub bar can be popped when the stub bar is ejected is solved. The invention provides an ejection structure for preventing a hard rubber head from bouncing off, which is used for solving the problems.

The technical scheme for solving the technical problem is as follows: the utility model provides an avoid ejecting structure that ebonite stub bar bullet flies, includes:

the top surface of the die core is provided with a horn gate, the horn gate comprises a linear part and an arc part, and one end of the arc part is communicated with one end of the linear part;

the top access device can be slidably arranged in the mold core in a penetrating way along the direction vertical to the mold core;

the straight line part passes through the position of the top access sub; a first groove is recessed in the position, corresponding to the linear part, of the top surface of the top nut;

the bottom surface of the first groove is also provided with a columnar cavity; the length direction of the columnar cavity is vertical to the mold core;

the ejector pins penetrate through the template, the upper ends of the ejector pins are connected with the ejector pins, and the lower ends of the ejector pins are fixedly connected with the ejector plate.

Preferably, the top access sub is provided with a first through hole, the upper end of the first through hole penetrates through the bottom surface of the first groove, and the lower end of the first through hole penetrates through the bottom surface of the top access sub;

the upper end of the thimble extends into the first through hole and is tightly matched with the first through hole;

the upper end of the ejector pin is located between the upper end and the lower end of the first through hole, and the inner wall of the first through hole and the upper end of the ejector pin enclose a columnar cavity.

Preferably, the upper end of the thimble gradually shrinks to form a protruding part with a small upper part and a big lower part.

Preferably, the top surface of the die core is also provided with a sub-runner; the top surface of the top access seed is provided with a second groove corresponding to the position of the branch channel;

the first groove is crossed with the second groove, and the upper end of the first through hole penetrates through the crossed part of the first groove and the second groove.

Preferably, the top surface of the template is recessed with a recessed part, and the mold core is positioned in the recessed part;

a boss is also protruded on the side wall of the top nut; the boss is arranged close to the bottom of the top nut;

the bottom surface of the depressed part is provided with a blind hole which is suitable for accommodating the top access nut and the boss to slide along the direction vertical to the die core, and one part of the top access nut and the boss are positioned in the blind hole.

Preferably, a gap is reserved between the inner wall of the blind hole and the top nut and the boss.

Preferably, the top access sub is in a regular quadrangular prism shape;

the die core is provided with a second through hole, and the length direction of the second through hole is vertical to the die core; the second through hole is a square hole matched with the shape of the top access nut; the top access sub is tightly matched and can be slidably inserted into the second through hole;

and a chamfer is arranged on the side edge of the top nut.

The ejection structure for preventing the hard rubber stub bar from flying has the advantages that the columnar containing cavity is arranged on the ejection insert, so that the stub bar is limited, and the stub bar can be prevented from flying when the hard rubber stub bar is ejected.

[ description of the drawings ]

Fig. 1 is a schematic diagram of glue feeding through a horn gate in the prior art.

Fig. 2 is a schematic structural diagram of an ejection structure for preventing a hard rubber head from bouncing off according to the present invention.

Fig. 3 is a partially enlarged view of fig. 2.

Fig. 4 is a cross-sectional view of an ejection structure for preventing a head of hard paste from bouncing off according to the present invention.

Fig. 5 is a schematic structural diagram of an ejector insert of an ejection structure for preventing a hard rubber head from bouncing off according to the present invention.

Fig. 6 is a usage state diagram of the ejection structure for preventing the hard rubber head from flying.

Fig. 7 is a partially enlarged view of fig. 6.

[ detailed description ] embodiments

To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to a preferred embodiment of the present invention and the accompanying drawings.

Referring to fig. 2 to 7, fig. 2 is a schematic structural diagram illustrating an ejection structure for preventing a hard adhesive stub bar from popping, fig. 3 is a partial enlarged view of fig. 2, fig. 4 is a cross-sectional view illustrating the ejection structure for preventing the hard adhesive stub bar from popping, fig. 5 is a schematic structural diagram illustrating an ejector of the ejection structure for preventing the hard adhesive stub bar from popping, fig. 6 is a diagram illustrating a usage state of the ejection structure for preventing the hard adhesive stub bar from popping, and fig. 7 is a partial enlarged view of fig. 6.

The invention provides an ejection structure for preventing a hard rubber stub bar 7 from bouncing off, which comprises:

referring to fig. 3 and 4, the top surface of the mold core 1 is provided with a horn gate 101, the horn gate 101 includes a straight line portion 1011 and an arc portion 1012, one end of the arc portion 1012 is communicated with one end of the straight line portion 1011, and the other end of the arc portion 1012 is communicated with the mold cavity.

The top access device 4, the top access device 4 can be slidably arranged through the mold core 1 along the direction vertical to the mold core 1.

The straight line part 1011 passes through the position of the top access sub 4, and the top surface of the top access sub 4 is recessed with a first groove 401 at a position corresponding to the straight line part 1011. When the top surface of the top nut 4 is flush with the top surface of the mold core 1, the straight line portion 1011 and the first groove 401 together form a first flow channel suitable for the flow of the molten hard glue.

The bottom surface of the first groove 401 further has a cylindrical cavity 402, and the length direction of the cylindrical cavity 402 is perpendicular to the mold insert 1.

Referring to fig. 4 and 6, the thimble 5 is inserted into the mold plate 2, an upper end of the thimble 5 is connected to the ejector pin 4, and a lower end of the thimble 5 is fixedly connected to the ejector plate 3.

In this embodiment, referring to fig. 4 and 5, the top mold insert 4 is provided with a first through hole 403, and a length direction of the first through hole 403 is perpendicular to the mold core 1. The upper end of the first through hole 403 penetrates the bottom surface of the first groove 401, and the lower end of the first through hole 403 penetrates the bottom surface of the top rotor 4.

The upper end of the thimble 5 extends into the first through hole 403 and is tightly matched with the first through hole 403. The upper end of the thimble 5 is located between the upper end and the lower end of the first through hole 403, and the inner wall of the first through hole 403 and the upper end of the thimble 5 enclose a cylindrical cavity 402.

The working process of the ejection structure for preventing the hard rubber stub bar 7 from bouncing off is as follows:

referring to fig. 6 and 7, when the plastic mold is closed, the top surface of the ejector core 4 is flush with the top surface of the mold core 1, the molten hard glue is injected into the first flow channel (the first flow channel is formed by the straight line portion 1011 and the first groove 401), the hard glue flows into the cavity through the arc portion 1012, and during this process, the hard glue also flows into and fills the cylindrical cavity 402. After the product 6 is solidified and formed in the cavity, the hard glue is also solidified in the horn gate 101 and the cylindrical cavity 402 to form the stub bar 7.

After the plastic mold is opened, an ejector rod of the forming machine pushes the ejector plate 3 to move towards the direction close to the mold plate 2, the ejector plate drives the ejector pin 5, and the ejector pin 5 drives the ejector pin 4 to eject the stub bar 7. In the process that the stub bar 7 is pulled out of the horn gate 101, the stub bar 7 is deformed and tends to fly, but because a part of the stub bar 7 is positioned in the columnar containing cavity 402, the columnar containing cavity 402 has a limiting effect on the stub bar 7, and the effect of preventing the stub bar 7 from flying is achieved. And after the stub bar 7 is ejected by the ejector insert 4, the stub bar 7 is taken away by the manipulator.

In this embodiment, referring to fig. 4, the upper end of the thimble 5 gradually shrinks to form a protrusion 501 with a small top and a large bottom. After the ebonite solidifies in ox horn runner 101 and column chamber 402 and forms stub bar 7, extension 501 stretches into stub bar 7 in, the increase with the area of contact of stub bar 7, the reinforcing is to the spacing effect of stub bar 7 for the effect that prevents stub bar 7 bullet to fly is better.

In this embodiment, referring to fig. 3, the top surface of the mold core 1 is further provided with a runner 102. The branch channel 102 passes through the position of the top access nut 4, and a second groove 404 is recessed on the top surface of the top access nut 4 corresponding to the position of the branch channel 102. The first groove 401 intersects the second groove 404, and the upper end of the first through hole 403 penetrates the intersection of the first groove 401 and the second groove 404.

When the top surface of the top runner 4 is flush with the top surface of the mold core 1, the runner 102 and the second groove 404 together form a second flow passage suitable for the flow of the molten hard glue. The hard rubber in a molten state flows into the first runner after flowing into the second runner from the main runner.

In this embodiment, referring to fig. 6 and 7, a recess 201 is recessed in the top surface of the mold plate 2, and the mold insert 1 is located in the recess 201. A boss 405 is also protruded on the sidewall of the top nut 4. The boss 405 is disposed near the bottom of the top nut 4. The bottom surface of the recessed portion 201 is provided with a blind hole 2011 adapted to accommodate the top nut 4 and the boss 405 to slide along a direction perpendicular to the mold core 1, and a portion of the top nut 4 and the boss 405 are located in the blind hole 2011.

In the process that the ejector rod of the forming machine pushes the ejector plate 3 to move towards the direction close to the template 2, when the boss 405 pushes against the bottom surface of the mold core 1, the movement of the ejector core 4 is limited and cannot be ejected continuously, so the arrangement of the boss 405 limits the ejection stroke of the ejector core 4.

In this embodiment, referring to fig. 7, a gap is left between the inner wall of the blind hole 2011 and the ejector 4 and the boss 405, so that the friction between the ejector 4 or the boss 405 and the inner wall of the blind hole 2011 is avoided, and the movement of the ejector 4 is facilitated.

In this embodiment, referring to fig. 3, 4 and 5, the top access sub 4 is in the shape of a regular quadrangular prism. The mold core 1 is provided with a second through hole 103, and the length direction of the second through hole 103 is perpendicular to the mold core 1. The second through hole 103 is a square hole matching the shape of the top nut 4. The top access sub 4 is slidably inserted into the second through hole 103 with a close fit. The side edge of the top nut 4 is provided with a chamfer 406.

The chamfer 406 of the top access sub 4 forms a clearance with the inner wall of the second through hole 103, so that the friction force between the top access sub 4 and the second through hole 103 is reduced, and the movement of the top access sub 4 in the second through hole 103 is facilitated. Note that the clearance between the top rotor 4 and the second through hole 103 should be kept away from the first flow channel and the second flow channel.

It should be noted that the present invention is not limited to the above embodiments, and any simple modification, equivalent change and modification made to the above embodiments by those skilled in the art based on the technical solution of the present invention fall within the protection scope of the present invention.