CN222201529U - Thimble pull-back device and injection molding mechanism with same - Google Patents
Thimble pull-back device and injection molding mechanism with same Download PDFInfo
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- CN222201529U CN222201529U CN202323466411.3U CN202323466411U CN222201529U CN 222201529 U CN222201529 U CN 222201529U CN 202323466411 U CN202323466411 U CN 202323466411U CN 222201529 U CN222201529 U CN 222201529U
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- injection molding
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- ejector pin
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 65
- 244000208734 Pisonia aculeata Species 0.000 title claims abstract description 42
- 230000000670 limiting effect Effects 0.000 claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000243 solution Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本实用新型涉及模具注塑的技术领域，具体公开了一种顶针拉回装置及具有其的注塑机构。顶针拉回装置设于模具的后模板一侧，包括面针板、底针板、顶针及拉回件。面针板与后模板相对设置；底针板与面针板层叠设置，底针板开设有安装孔，安装孔的底部内壁具有防脱结构；顶针一端与底针板的侧面抵接，另一端穿设面针板且自后模板穿入模具的型腔与产品抵接；拉回件一端具有限位结构，限位结构自安装孔的顶部穿入并移动至安装孔的底部，限位结构抵接于面针板与防脱结构之间。本方案安装简单，不依赖外部辅助设备，缩短模具安装周期；工件较少，制造简单，成本较低；连接牢固，拉回性能可靠，维护简单。
The utility model relates to the technical field of mold injection molding, and specifically discloses an ejector pin pull-back device and an injection molding mechanism having the same. The ejector pin pull-back device is arranged on one side of the rear template of the mold, and includes a face pin plate, a bottom pin plate, an ejector pin and a pull-back member. The face pin plate is arranged opposite to the rear template; the bottom pin plate and the face pin plate are stacked, and the bottom pin plate is provided with a mounting hole, and the bottom inner wall of the mounting hole has an anti-slip structure; one end of the ejector pin abuts against the side of the bottom pin plate, and the other end passes through the face pin plate and penetrates from the rear template into the mold cavity to abut against the product; one end of the pull-back member has a limiting structure, and the limiting structure penetrates from the top of the mounting hole and moves to the bottom of the mounting hole, and the limiting structure abuts between the face pin plate and the anti-slip structure. This solution is easy to install, does not rely on external auxiliary equipment, and shortens the mold installation cycle; there are fewer workpieces, simple manufacturing, and low cost; the connection is firm, the pull-back performance is reliable, and maintenance is simple.
Description
Technical Field
The utility model relates to the technical field of mold injection, in particular to a thimble pulling device and an injection mechanism with the thimble pulling device.
Background
Injection molding is a process used in mass production of parts of complex shape. The concrete principle is that the heated and melted plastic raw material is pushed by a screw rod of an injection molding machine to be injected into a die cavity of a plastic die under high pressure, and the plastic molded product is obtained after cooling and solidification.
The plastic mould consists of a movable mould and a fixed mould, wherein the movable mould is arranged on a movable mould plate of the injection moulding machine, and the fixed mould is arranged on a fixed mould plate of the injection moulding machine. The movable mould and the fixed mould are closed to form a pouring system and a cavity during injection molding, and the movable mould and the fixed mould are separated during mould opening so as to take out plastic products.
In the injection molding process of the mold, when the mold cavity is filled with glue and demolding is started, the ejector pins are ejected to a preset position by virtue of the mold rear mold ejector plate, and the mold ejector pins eject products to realize separation of the products and the mold.
But the thimble must be withdrawn completely when the mould is closed, and the thimble board needs to have a pull-back structure, and at present, the pull-back structure is complicated to install, prolongs the mould installation time, and reduces production efficiency.
Disclosure of utility model
In view of the above, the utility model provides a thimble pulling-back structure and a mold with the thimble pulling-back structure, so as to solve the problems that the existing pulling-back structure is complex to install, the mold installation time is prolonged, and the production efficiency is reduced.
In a first aspect, the present utility model provides a thimble retracting device, which is disposed on one side of a rear mold plate of a mold, and includes a face needle plate, a bottom needle plate, a thimble, and a retracting member. The surface needle plate and the rear template are oppositely arranged, the bottom needle plate and the surface needle plate are arranged in a stacked mode, a mounting hole is formed in the bottom needle plate, an anti-falling structure is arranged on the inner wall of the bottom of the mounting hole, one end of the thimble is abutted to the side face of the bottom needle plate, the other end of the thimble penetrates through the surface needle plate and penetrates into a cavity of the die from the rear template to be abutted to a product, a limiting structure is arranged at one end of the pull-back piece, penetrates from the top of the mounting hole and moves to the bottom of the mounting hole, and the limiting structure is abutted between the surface needle plate and the anti-falling structure.
In an alternative embodiment, the ejector pin pulling device further comprises a bottom plate, the bottom plate and the bottom needle plate are stacked, the bottom plate is provided with an avoidance hole, and the other end of the pulling piece is provided with the avoidance hole in a penetrating mode.
In an alternative embodiment, the relief holes are sized to conform to the size of the mounting holes.
In an alternative embodiment, the ejector pin pulling device further comprises an ejector pin of the injection molding machine, and the ejector pin of the injection molding machine is detachably connected with the other end of the pulling piece.
In an alternative embodiment, the ejector pin pulling device further comprises a rear plate of the injection molding machine, the rear plate of the injection molding machine is arranged in a stacked mode with the bottom plate, the rear plate of the injection molding machine is provided with a guide hole, and the ejector pin of the injection molding machine penetrates through the guide hole.
In an alternative embodiment, the guide holes are sized to correspond to the bottom area of the mounting holes.
In an alternative embodiment, the bottom plate is provided with guide posts, the guide posts penetrate through the bottom needle plate, the face needle plate and the rear template in sequence, and the bottom needle plate and the face needle plate are close to or far away from the rear template along the guide posts.
In an alternative embodiment, the ejector pin pulling device further comprises a partition plate, and the partition plate is abutted between the rear template and the bottom plate.
In an alternative embodiment, the anti-drop structure comprises a non-return flange, and the limiting structure comprises an annular protrusion, wherein the annular protrusion is abutted between the face needle plate and the non-return flange.
In a second aspect, the utility model further provides an injection molding mechanism, which comprises a mold and the ejector pin pulling device in the first aspect, wherein the top of the mold is provided with a hanging ring, and the ejector pin pulling device is arranged on one side of a rear mold plate of the mold.
The beneficial effects are that:
In the first aspect, the thimble pull-back device is provided with the anti-drop structure at the bottom of the mounting hole of the bottom needle plate, the limit structure of the pull-back piece penetrates from the top of the mounting hole, and then the bottom needle plate is moved upwards or the pull-back piece is moved downwards, so that the limit structure of the pull-back piece is abutted between the surface needle plate and the anti-drop structure, the installation is simple, the installation period of a mould is shortened without depending on external auxiliary equipment, in addition, the proposal has fewer workpieces, simple manufacture and lower cost, and in addition, the proposal has firm connection, reliable pull-back performance and simple maintenance.
The injection molding mechanism of the second aspect includes the ejector pin retracting device of the first aspect, and thus the injection molding mechanism of the second aspect has all the advantageous effects of the ejector pin retracting device of the first aspect.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an injection molding mechanism prior to modification;
fig. 2 is a schematic structural view of an injection molding mechanism according to an embodiment of the present utility model.
Reference numerals illustrate:
1. The device comprises a face needle plate, a bottom needle plate, a mounting hole, a 202 anti-falling structure, a3 ejector pin, a 4-pull back piece, a 401-limit structure, a 5-bottom plate, a 501-avoiding hole, a 502-guide post, a 6-injection molding machine ejector rod, a 7-injection molding machine rear plate, a 701-guide hole, a 8-partition plate, a 9-rear template, a 10-rear die core, a 11-product, a 12-row position, a 13-lifting ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In order to enhance the understanding of the solution of the present utility model, the technical problems need to be elaborated in combination with the related technologies, and the specific contents are as follows:
Injection molding is a process used in mass production of parts of complex shape. The concrete principle is that the heated and melted plastic raw material is pushed by a screw rod of an injection molding machine to be injected into a die cavity of a plastic die under high pressure, and the plastic molded product is obtained after cooling and solidification.
The plastic mould consists of a movable mould and a fixed mould, wherein the movable mould is arranged on a movable mould plate of the injection moulding machine, and the fixed mould is arranged on a fixed mould plate of the injection moulding machine. The movable mould and the fixed mould are closed to form a pouring system and a cavity during injection molding, and the movable mould and the fixed mould are separated during mould opening so as to take out plastic products.
In the injection molding process of the mold, when the mold cavity is filled with glue and demolding is started, the ejector pins are ejected to a preset position by virtue of the mold rear mold ejector plate, and the mold ejector pins eject products to realize separation of the products and the mold.
But the thimble must be withdrawn completely when the mould is closed, and the thimble board needs to have a pull-back structure, and at present, the pull-back structure is complicated to install, prolongs the mould installation time, and reduces production efficiency.
Further, referring to the figure, the pull back member is first attached to the bottom needle plate, and then the bottom needle plate and the face needle plate are fixed together. Thus, the whole pull-back structure is fixed and is arranged in the die. Then the ejector rod of the injection molding machine is screwed into the pull-back structure, after the ejector rod of the injection molding machine is screwed, the other end of the ejector rod of the injection molding machine is screwed into the injection molding machine, because both sides are required to be aligned, the side of the die is provided with a jack, and the crane is difficult to align, each time of installation is very difficult, the die installation is complicated, and the die installation time is prolonged.
In order to alleviate the above technical problems, the present utility model provides a thimble retracting device and an injection mechanism with the same, and an embodiment of the present utility model is described in detail below with reference to fig. 2.
Referring to fig. 2, the present utility model provides a thimble retracting device, which is disposed on one side of a back mold plate 9 of a mold, and includes a face needle plate 1, a bottom needle plate 2, a thimble 3, and a retracting member 4. The surface needle plate 1 is arranged opposite to the rear template 9, the bottom needle plate 2 and the surface needle plate 1 are arranged in a stacked mode, the bottom needle plate 2 is provided with a mounting hole 201, the inner wall of the bottom of the mounting hole 201 is provided with an anti-falling structure 202, one end of the thimble 3 is abutted against the side face of the bottom needle plate 2, the other end of the thimble 3 penetrates through the surface needle plate 1 and penetrates into a cavity of a die from the rear template 9 to be abutted against a product 11, one end of the pull-back piece 4 is provided with a limiting structure 401, the limiting structure 401 penetrates into the top of the mounting hole 201 and moves to the bottom of the mounting hole 201, and the limiting structure 401 is abutted between the surface needle plate 1 and the anti-falling structure 202.
Specifically, the thimble pull-back device is characterized in that the anti-drop structure 202 is arranged at the bottom of the mounting hole 201 of the bottom needle plate 2, the limit structure 401 of the pull-back piece 4 penetrates from the top of the mounting hole 201, and then the bottom needle plate 2 is moved upwards or the pull-back piece 4 is moved downwards, so that the limit structure 401 of the pull-back piece 4 is abutted between the face needle plate 1 and the anti-drop structure 202, the installation is simple, no external auxiliary equipment is relied on, the die installation period is shortened, in addition, the scheme has fewer workpieces, simple manufacture and lower cost, in addition, the scheme has firm connection, reliable pull-back performance and simple maintenance.
More specifically, the rear mold plate 9 of the mold is connected with the rear mold core 10, a cavity is formed between the rear mold core 10 and the front mold core of the front mold plate, a product 11 is formed in the cavity by injection molding, the ejector pin 3 penetrates into the cavity to eject the product 11 out of the rear mold core 10, and a row position 12 is arranged above the cavity, and when demolding is carried out, the row position 12 moves upwards to be separated from the product 11, so that the ejector pin 3 can eject the product 11 conveniently.
In some embodiments, referring to fig. 2, the ejector pin retracting device further includes a bottom plate 5, where the bottom plate 5 is stacked with the bottom needle plate 2, the bottom plate 5 is provided with a retracting hole 501, and the other end of the retracting member 4 is penetrated by the retracting hole 501.
In particular, the bottom plate 5 is adapted to limit the movement of the bottom needle plate 2.
In some embodiments, referring to fig. 2, relief hole 501 is sized to correspond with mounting hole 201.
Specifically, the pull-back member 4 sequentially passes through the avoiding hole 501 and the mounting hole 201, then moves downward, and the limit structure 401 of the pull-back member 4 moves between the anti-falling structure 202 of the mounting hole 201 and the face needle plate 1, so that the avoiding hole 501 is free from interference in the whole process.
In some embodiments, referring to FIG. 2, the ejector pin pullback device further comprises an injection molding machine ejector pin 6, the injection molding machine ejector pin 6 being detachably connected to the other end of the pullback member 4.
Specifically, ejector rod 6 of the injection molding machine is in threaded connection with pull-back piece 4, the other end of ejector rod 6 of the injection molding machine is connected with the injection molding machine, corresponding mechanism of the injection molding machine drives ejector rod 6 of the injection molding machine to move back, and then drives pull-back piece 4 to move back, pull-back piece 4 pulls face needle plate 1 and bottom needle plate 2 away from rear template 9, and therefore ejector pin 3 is led to exit the cavity of the die.
In some embodiments, referring to fig. 2, the ejector pin pulling device further includes an injection molding machine rear plate 7, where the injection molding machine rear plate 7 and the bottom plate 5 are stacked, the injection molding machine rear plate 7 is provided with a guide hole 701, and the injection molding machine ejector pin 6 passes through the guide hole 701.
Specifically, the injection molding machine back plate 7 is connected with the injection molding machine, and the injection molding machine back plate 7 guides the movement of the injection molding machine ejector pin 6 through the guide hole 701, preventing the movement from generating offset.
In some embodiments, referring to fig. 2, the guide holes 701 are sized to correspond with the bottom area of the mounting holes 201.
Specifically, the aperture of the guide hole 701 is smaller than the apertures of the mounting hole 201 and the avoiding hole 501, and the guide hole 701 is only slightly larger than the diameter of the ejector rod 6 of the injection molding machine, so that the limiting effect on the ejector rod 6 of the injection molding machine is better achieved.
In some embodiments, referring to fig. 2, the bottom plate 5 has guide posts 502, and the guide posts 502 sequentially penetrate the bottom needle plate 2, the face needle plate 1, and the rear mold plate 9, and the bottom needle plate 2 and the face needle plate 1 are close to or far from the rear mold plate 9 along the guide posts 502.
Specifically, the guide posts 502 in the present embodiment provide a guiding function for the movement of the face needle plate 1 and the bottom needle plate 2, so as to avoid the movement from generating deflection, and the thimble 3 is bent.
In some embodiments, referring to fig. 2, the ejector pin pulling device further comprises a partition 8, and the partition 8 is abutted between the rear mold plate 9 and the bottom plate 5.
Specifically, the baffle plate 8 in the scheme supports the rear template 9 and the bottom plate 5, a gap is formed between the rear template 9 and the bottom plate 5, the face needle plate 1 and the bottom needle plate 2 move in the gap, when the bottom needle plate 2 moves towards the rear template 9, the ejector pins 3 extend towards the product 11 and are used for ejecting the product 11 after the product 11 is injected, so that the product 11 is separated from the rear mold core 10, and when the pull-back piece 4 drives the bottom needle plate 2 to move away from the rear template 9, the ejector pins 3 are driven to retract, so that the next injection of the product 11 is facilitated.
In some embodiments, referring to fig. 2, the anti-drop structure 202 includes a non-return flange, and the limit structure 401 includes an annular protrusion that abuts between the face needle plate 1 and the non-return flange.
Specifically, the scheme is a specific connection mode of the anti-falling structure 202 of the bottom needle plate 2 and the limiting structure 401 of the pull-back piece 4, and the structure is simple and the connection is firm.
Next, referring to fig. 2, the present utility model further provides an injection molding mechanism, which includes a mold and a thimble pulling device, wherein a hanging ring 13 is disposed at the top of the mold, and the thimble pulling device is disposed at one side of a rear mold plate 9 of the mold.
Specifically, the injection molding mechanism in this scheme includes thimble pullback device, so the injection molding mechanism in this scheme has the whole beneficial effect of thimble pullback device. The injection mechanism according to the present invention includes other components, and only the components relating to the present invention are listed here, but the configuration of the injection mechanism is not limited.
More specifically, the ejector rod 6 of the injection molding machine is connected with the injection molding machine, the ejector rod 6 of the injection molding machine penetrates into the rear plate 7 of the injection molding machine and is connected with the pull-back piece 4, the lifting device is used for hooking the hanging ring 13 to lift the mold, the limiting structure 401 of the pull-back piece 4 sequentially penetrates into the avoiding hole 501 of the bottom plate 5 and the mounting hole 201 of the bottom needle plate 2, and then the lifting device is used for moving up the mold, so that the limiting structure 401 of the pull-back piece 4 moves to the anti-falling structure 202 of the avoiding hole 501 and is abutted between the face needle plate 1 and the anti-falling structure 202.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Claims (10)
1. The ejector pin pulling-back device is arranged on one side of a rear template (9) of the die and is characterized by comprising:
a face needle plate (1) arranged opposite to the rear template (9);
The bottom needle plate (2) is arranged in a stacked mode with the surface needle plate (1), the bottom needle plate (2) is provided with a mounting hole (201), and the inner wall of the bottom of the mounting hole (201) is provided with an anti-falling structure (202);
One end of the ejector pin (3) is abutted with the side surface of the bottom needle plate (2), and the other end of the ejector pin penetrates through the surface needle plate (1) and penetrates into the cavity of the die from the rear die plate (9) to be abutted with a product (11);
And one end of the pull-back piece (4) is provided with a limiting structure (401), the limiting structure (401) penetrates from the top of the mounting hole (201) and moves to the bottom of the mounting hole (201), and the limiting structure (401) is abutted between the face needle plate (1) and the anti-falling structure (202).
2. The thimble pulling device according to claim 1, further comprising a bottom plate (5), wherein the bottom plate (5) and the bottom needle plate (2) are stacked, the bottom plate (5) is provided with a avoiding hole (501), and the other end of the pulling member (4) is provided with the avoiding hole (501).
3. The ejector pin retracting device according to claim 2, wherein the relief hole (501) is of a same size as the mounting hole (201).
4. A thimble pullback device as claimed in claim 3, further comprising an injection molding machine ejector (6), the injection molding machine ejector (6) being detachably connected to the other end of the pullback member (4).
5. The thimble pulling device according to claim 4, further comprising a rear plate (7) of the injection molding machine, wherein the rear plate (7) of the injection molding machine is stacked with the bottom plate (5), the rear plate (7) of the injection molding machine is provided with a guide hole (701), and the ejector rod (6) of the injection molding machine is inserted through the guide hole (701).
6. The ejector pin retracting device according to claim 5, wherein the guiding hole (701) is of a same size as the bottom area of the mounting hole (201).
7. The thimble pulling device according to claim 2, wherein the bottom plate (5) has a guide post (502), the guide post (502) penetrates through the bottom needle plate (2), the face needle plate (1) and the rear template (9) in sequence, and the bottom needle plate (2) and the face needle plate (1) are close to or far from the rear template (9) along the guide post (502).
8. The ejector pin retracting device according to claim 2, further comprising a spacer (8), said spacer (8) being in abutment between said rear template (9) and said bottom plate (5).
9. The ejector pin retracting device according to any one of claims 1 to 8, wherein the anti-drop structure (202) comprises a non-return flange, and the limiting structure (401) comprises an annular protrusion, and the annular protrusion is abutted between the face needle plate (1) and the non-return flange.
10. An injection molding mechanism, characterized by comprising a mold and the ejector pin pulling device according to any one of claims 1 to 9, wherein the top of the mold is provided with a hanging ring (13), and the ejector pin pulling device is arranged on one side of a rear template (9) of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323466411.3U CN222201529U (en) | 2023-12-18 | 2023-12-18 | Thimble pull-back device and injection molding mechanism with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323466411.3U CN222201529U (en) | 2023-12-18 | 2023-12-18 | Thimble pull-back device and injection molding mechanism with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222201529U true CN222201529U (en) | 2024-12-20 |
Family
ID=93864520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323466411.3U Active CN222201529U (en) | 2023-12-18 | 2023-12-18 | Thimble pull-back device and injection molding mechanism with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222201529U (en) |
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2023
- 2023-12-18 CN CN202323466411.3U patent/CN222201529U/en active Active
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