CN220163139U - Demoulding structure of internal thread - Google Patents
Demoulding structure of internal thread Download PDFInfo
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- CN220163139U CN220163139U CN202321609075.0U CN202321609075U CN220163139U CN 220163139 U CN220163139 U CN 220163139U CN 202321609075 U CN202321609075 U CN 202321609075U CN 220163139 U CN220163139 U CN 220163139U
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- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 150000001875 compounds Chemical class 0.000 claims description 52
- 238000001746 injection moulding Methods 0.000 claims description 36
- 241000446313 Lamella Species 0.000 claims description 16
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model belongs to the technical field of injection molds and discloses an internal thread demoulding structure, which comprises a fixed die assembly and a movable die assembly, wherein the fixed die assembly internally comprises an internal drawing mechanism, the internal drawing mechanism comprises an internal drawing center rod, a plurality of small petals and a plurality of large petals, threads are arranged on the peripheries of the small petals and the large petals, the small petals and the large petals are sequentially enclosed on the periphery of the internal drawing center rod to form a threaded core of an internal thread product, the internal drawing center rod is fixedly connected to the fixed die assembly, the internal drawing center rod is drawn away along with the opening of the fixed die assembly during demoulding, and the inner side space of the small petals and the large petals is loosened so as to realize the separation of the internal thread product from the threaded core. According to the utility model, through the internal drawing structure, the multi-cavity development of the product can be ensured, the full-automatic operation of the whole process of internal cutting is realized, the demolding time is greatly reduced, the production efficiency is effectively improved, and the reject ratio of the product is reduced.
Description
Technical Field
The utility model belongs to the technical field of injection molds, and particularly relates to a demolding structure of an internal thread.
Background
The injection molding process refers to the process of manufacturing thermoplastic plastics or thermosetting materials into plastic products with various shapes by using a plastic molding die, and injection molding is realized by an injection molding machine and the die. In the processing of injection molds, a large number of plastic products are provided with internal threads, and the required precision size is also higher and higher. At present, the inner core of an injection mold for internal screw thread parts is molded by mostly adopting a screw thread rotary core, and an oil motor is adopted to drive the screw thread rotary core to rotate during demolding until the screw thread rotary core is completely separated, so that demolding can be completed. The method has long demolding time, prolongs the production period of the product and reduces the production efficiency. If the product is multi-cavity, the oil motor is adopted to rotate, so that the volume and the cost of the die are increased, the risk of oil leakage of the oil motor is also caused, and the production safety and the quality are affected.
Disclosure of Invention
The utility model aims to provide a demoulding structure of an internal thread so as to solve the technical problems.
In order to achieve the above purpose, the specific technical scheme of the demoulding structure of the internal thread is as follows:
the utility model provides an internal thread demoulding structure, includes cover half subassembly and movable mould subassembly, the cover half subassembly is fixed on the injection molding machine board, movable mould subassembly is driven by the injection molding machine and is taken out with the cover half subassembly pressfitting, carries out the injection molding of goods, and the drawing of patterns is realized by injection molding machine drive movable mould subassembly and cover half subassembly separation after the injection molding cooling, including interior drawing mechanism in the cover half subassembly, interior drawing mechanism includes interior center pole, a plurality of small lamella and a plurality of big lamella, small lamella and big lamella periphery have the screw thread, small lamella and big lamella enclose in proper order and close including center pole periphery, form the screw thread core of internal thread goods, interior center pole fixed connection takes out on the cover half subassembly in the drawing of patterns, thereby the internal thread and the screw thread core of internal thread goods break away are realized to small lamella and big lamella inboard space looseness.
Further, the number of the small petals and the large petals is three, and the small petals and the large petals are sequentially enclosed on the periphery of the inner pumping center rod in sequence.
Further, the cover half assembly comprises an upper compound plate, a cover half frame and an upper cavity, wherein the upper compound plate is fixedly connected to a plate of an injection molding machine, the position of the upper compound plate is fixed, the cover half frame 11 is fixedly connected to the upper compound plate, the upper cavity is formed in the cover half frame, and the upper half shape of a product is formed in the upper cavity.
Further, the inner drawing center rod is fixedly connected to the upper complex plate through a clamping groove block and a screw, the small valve and the large valve are limited and arranged in the upper cavity of the fixed die frame through limiting blocks, and the limiting blocks are fixed to the fixed die frame through screws.
Further, the upper compound plate is fixedly connected with the fixed die frame through a limit screw, a spring is sleeved on the limit screw, and the spring is compressed during die assembly; when demoulding, under the action of the elasticity of the spring, the upper compound plate and the fixed die frame are separated under the action of the spring, and the upper compound plate drives the inner drawing center rod of the inner drawing mechanism to be drawn away from the small valve and the large valve.
Further, the movable die assembly comprises a lower compound plate, die legs and a movable die frame, wherein the lower compound plate is fixedly connected to an injection molding machine, the injection molding machine pushes the whole movable die assembly to move, the die legs are fixed on the lower compound plate, the movable die frame is fixed on the die legs, and a lower cavity is formed in the movable die frame; the lower cavity forms the shape of the lower half of the article.
Further, a product model cavity is formed between the fixed die frame and the movable die frame, a sprue bush is arranged in the upper compound plate and the fixed die frame, and the sprue bush enters a runner between the upper die cavity and the lower die cavity and flows into the product model cavity of the upper die cavity and the lower die cavity.
Further, a plurality of plastic draw hooks are fixed on the movable mold frame, the fixed mold frame is provided with hole sites in interference fit with the plastic draw hooks, and the plastic draw hooks are in interference connection with the hole sites.
Further, form the cavity that holds the thimble subassembly between lower compound board, mould foot and the movable mould frame, thimble subassembly thimble board, thimble compound board, thimble, reset lever and reset spring, thimble and reset lever bottom fixed connection are on the thimble board, thimble compound board fixed connection is at thimble board bottom, the reset lever has reset spring in the partial cover of cavity, the reset lever passes the movable mould frame, the runner top that the thimble passed between movable mould frame and last die cavity and the lower die cavity connects.
Further, the lower compound plate is provided with a die ejection hole, an ejection rod on the injection molding machine ejects the ejector pin out of the surface of the movable die frame through the die ejection hole ejector pin compound plate, the reset spring is compressed, after the ejection rod on the injection molding machine retracts, the reset rod drives the ejector pin compound plate to reset under the action of the reset spring, and the ejector pin is reset.
The demoulding structure of the internal thread has the following advantages: according to the utility model, through the internal drawing structure, the multi-cavity development of the product can be ensured, the full-automatic operation of the whole process of internal cutting is realized, the demolding time is greatly reduced, the production efficiency is effectively improved, and the reject ratio of the product is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a portion of a stripping structure for internal threads according to the present utility model;
FIG. 2 is a schematic cross-sectional view of a portion of a stripping structure for internal threads according to the present utility model;
FIG. 3 is a schematic diagram of an internal pumping mechanism according to the present utility model;
FIG. 4 is a schematic view of a limiting and fixing structure of an internal pumping mechanism according to the present utility model;
the figure indicates: 10. coating a composite board; 11. a fixed mold frame; 111. hole sites; 12. an upper cavity; 13. a sprue bush; 14. a limit screw; 15. a spring; 16. an inner pumping mechanism; 161. drawing the central rod inwards; 162. small petals; 163. large petals; 17. a clamping groove block; 18. a screw; 19. a limiting block; 21. a lower compound plate; 211. an ejection hole; 22. a mold foot; 23. a movable mold frame; 24. a lower cavity; 25. a plastic drag hook; 26. a thimble assembly; 261. a needle ejection plate; 262. a thimble replica board; 263. a thimble; 264. a reset lever; 265. a return spring; 3. an internally threaded article.
Detailed Description
For a better understanding of the objects, structure and function of the present utility model, a demoulding structure for internal threads according to the present utility model will be described in further detail with reference to the accompanying drawings.
1-2, a main part structure diagram of an internal thread demoulding structure of the utility model comprises a fixed die assembly and a movable die assembly, wherein the fixed die assembly is fixed on a plate of an injection molding machine, the movable die assembly is driven by the injection molding machine to be pressed with the fixed die assembly for injection molding of products, and the movable die assembly is driven by the injection molding machine to be separated from the fixed die assembly after injection molding cooling to realize demoulding.
The fixed die assembly comprises an upper compound plate 10, a fixed die frame 11 and an upper die cavity 12, wherein the upper compound plate 10 is fixedly connected to a plate of an injection molding machine, the fixed die frame 11 is fixedly connected to the upper compound plate 10, the fixed die frame 11 is internally provided with the upper die cavity 12, and the upper die cavity 12 is internally provided with an upper half part of the internal thread product 3.
The movable die assembly comprises a lower compound plate 21, a die leg 22, a movable die frame 23 and a lower cavity 24, wherein the lower compound plate 21 is fixedly connected to an injection molding machine, the whole movable die assembly is pushed to move by the injection molding machine, the die leg 22 is fixed on the lower compound plate 21, the movable die frame 23 is fixed on the die leg 22, and the movable die frame 23 is internally provided with the lower cavity 24; the lower cavity 24 is formed with the shape of the lower half of the internally threaded article 3.
The injection molding machine pushes the movable die assembly to be pressed with the fixed die assembly, a product model cavity is formed between the fixed die frame 11 and the movable die frame 23, a sprue bush 13 is arranged in the upper doubling plate 10 and the fixed die frame 11, the sprue bush 13 enters a runner between the upper cavity and the lower cavity and flows into the product model cavity of the upper cavity and the lower cavity to form an internal thread product 3, and the internal thread product 3 is demoulded and separated after being cooled and molded in the product model cavity.
The upper compound plate 10 is fixedly connected with the fixed die frame 11 through four limit screws 14, springs 15 are sleeved on the limit screws 14, and the springs 15 are compressed during die assembly.
Four plastic draw hooks 25 are fixed on the movable mould frame 23, the fixed mould frame 11 is provided with hole sites 111 in interference fit with the plastic draw hooks 25, and the plastic draw hooks 25 are in interference connection with the hole sites 111.
A cavity for accommodating the ejector pin assembly 26 is formed among the lower compound plate 21, the die leg 22 and the movable die frame 23, the ejector pin assembly 26 comprises an ejector pin plate 261, an ejector pin compound plate 262, an ejector pin 263, a reset rod 264 and a reset spring 265, the bottoms of the ejector pin 263 and the reset rod 264 are fixedly connected to the ejector pin plate 261, the ejector pin compound plate 262 is fixedly connected to the bottom of the ejector pin plate 261, the reset rod 264 is sleeved with the reset spring 265 in the cavity, the reset rod 264 penetrates through the movable die frame 23, and the ejector pin 263 penetrates through a runner between the movable die frame 23 and the upper die cavity and the lower die cavity to be in ejection connection. The lower compound plate 21 is provided with a limiting post 266, the limiting post 266 passes through the ejector plate 261 and the ejector plate compound plate 262 and is fixedly connected with the movable mould frame 23, and the limiting post 266 is used for fixing the positions of the ejector plate 261 and the ejector plate compound plate 262 so as not to deviate. The lower compound plate 21 is provided with a die ejection hole 211, an ejection rod on the injection molding machine ejects the ejector pin 263 out of the surface of the movable die frame 23 through the die ejection hole 211 and the ejector pin compound plate 262, at this time, the reset spring 265 is compressed, and after the ejection rod on the injection molding machine is retracted, the reset rod 264 drives the ejector pin compound plate 262 to reset under the action of the reset spring 265, so that the ejector pin 263 is reset.
The demoulding structure of the internal thread comprises an internal drawing mechanism 16, wherein the internal drawing mechanism 16 is arranged in a fixed mould component, as shown in figure 3, the internal drawing mechanism 16 comprises an internal drawing center rod 161, three small petals 162 and three large petals 163, and the peripheries of the small petals 162 and the large petals 163 are provided with threads. Three small petals 162 and three large petals 163 are sequentially wrapped around the outer periphery of the inner pumping center rod 161 in a large petal-to-small petal order to form a threaded core for an internally threaded article. As shown in fig. 4, the inner drawing center rod 161 is fixedly connected to the upper complex plate 10 through the clamping groove block 17 and the screw 18, the three small petals 162 and the three large petals 163 are arranged in the upper cavity of the fixed mold frame 11 in a limiting manner through the limiting block 19, and the limiting block 19 is fixed on the fixed mold frame 11 through the screw.
After injection molding, the injection molding machine drives the movable mold assembly to open, the movable mold frame 23 and the fixed mold frame 11 are not separated under the action of the plastic drag hook 25, the upper compound plate 10 and the fixed mold frame 11 are separated under the action of the spring 15, the upper compound plate 10 drives the inner drawing center rod 161 of the inner drawing mechanism 16 to draw away from the small valve 162 and the large valve 163, the inner spaces of the small valve 162 and the large valve 163 are loosened, the product internal threads are separated from the threaded core, the mold is opened continuously, the plastic drag hook 25 is separated from the hole site 111, the movable mold frame 23 is separated from the fixed mold frame 11, the hidden gate is cut off from the internal thread product 3, finally the internal thread product 3 is jacked to the ejector plate 261 through the ejector rod, and finally the ejector pin 263 safely separates the internal thread product 3.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides an internal thread demoulding structure, includes cover half subassembly and movable mould subassembly, the cover half subassembly is fixed on the injection molding machine board, movable mould subassembly is driven by the injection molding machine and is pressed together with the cover half subassembly, carries out the injection molding of goods, and the separation of movable mould subassembly and cover half subassembly is realized drawing of patterns by the injection molding machine drive after the injection molding cooling, a serial communication port, including interior take out mechanism (16) in the cover half subassembly, interior take out mechanism (16) including interior take out center pole (161), a plurality of small lamella (162) and a plurality of big lamella (163), small lamella (162) and big lamella (163) periphery have the screw thread, small lamella (162) and big lamella (163) enclose in proper order and are taken out center pole (161) periphery including, form the screw thread core of internal thread goods (3), take out center pole (161) fixed connection in the cover half subassembly, take out center pole (161) and take out with the cover half subassembly open and take out when the drawing of patterns, thereby small lamella (162) and big lamella (163) are inside space loose and are realized internal thread goods (3) and are taken out with the screw thread core.
2. The female screw demoulding structure according to claim 1, wherein the small flaps (162) and the large flaps (163) are each three, and are sequentially enclosed around the periphery of the female central rod (161) in the order of one large flap to one small flap.
3. The internal thread demoulding structure as claimed in claim 1, wherein the fixed mould assembly comprises an upper compound plate (10), a fixed mould frame (11) and an upper cavity (12), the upper compound plate (10) is fixedly connected to a plate of an injection molding machine, the fixed mould frame (11) is fixedly connected to the upper compound plate (10), the fixed mould frame (11) is internally provided with the upper cavity (12), and the upper cavity (12) is internally provided with an upper half part of the internal thread product (3).
4. A demoulding structure with internal threads according to claim 3, characterized in that the internal drawing central rod (161) is fixedly connected to the upper complex plate (10) through a clamping groove block (17) and a screw (18), the small valve (162) and the large valve (163) are arranged in the upper cavity (12) of the fixed mould frame (11) in a limiting way through a limiting block (19), and the limiting block (19) is fixed on the fixed mould frame (11) through a screw.
5. The internal thread demoulding structure according to claim 3, wherein the upper compound plate (10) and the fixed mould frame (11) are fixedly connected through a limit screw (14), a spring (15) is sleeved on the limit screw (14), and the spring (15) is compressed during mould closing; when in demolding, under the action of the elasticity of the spring (15), the upper compound plate (10) and the fixed die frame (11) are separated under the action of the spring (15), and the upper compound plate (10) drives the inner drawing center rod (161) of the inner drawing mechanism (16) to draw away from the small valve (162) and the large valve (163).
6. A demoulding structure with internal threads according to claim 3, characterized in that the movable mould assembly comprises a lower compound plate (21), a mould foot (22) and a movable mould frame (23), wherein the lower compound plate (21) is fixedly connected to an injection moulding machine, the whole movable mould assembly is pushed to move by the injection moulding machine, the mould foot (22) is fixed on the lower compound plate (21), the movable mould frame (23) is fixed on the mould foot (22), and a lower mould cavity (24) is formed in the movable mould frame (23); the lower cavity (24) is internally provided with a lower half part shape of the internal thread product (3).
7. The internal thread demoulding structure as claimed in claim 6, wherein a product model cavity is formed between the fixed mould frame (11) and the movable mould frame (23), a sprue bush (13) is arranged in the upper compound plate (10) and the fixed mould frame (11), and the sprue bush (13) enters a runner between the upper cavity (12) and the lower cavity (24) and flows into the product model cavity of the upper cavity (12) and the lower cavity (24).
8. The internal thread demoulding structure as claimed in claim 6, wherein a plurality of plastic draw hooks (25) are fixed on the movable mould frame (23), the fixed mould frame (11) is provided with hole sites (111) in interference fit with the plastic draw hooks (25), and the plastic draw hooks (25) are in interference connection with the hole sites (111).
9. The internal thread demoulding structure according to claim 7, wherein a cavity for accommodating a thimble assembly (26) is formed among the lower compound plate (21), the die leg (22) and the movable die frame (23), the thimble assembly (26) is used for ejecting a needle plate (261), a thimble compound plate (262), a thimble (263), a reset rod (264) and a reset spring (265), the bottoms of the thimble (263) and the reset rod (264) are fixedly connected to the thimble plate (261), the thimble compound plate (262) is fixedly connected to the bottom of the thimble plate (261), the reset spring (265) is sleeved on the part of the reset rod (264) in the cavity, the reset rod (264) penetrates through the movable die frame (23), and the thimble (263) penetrates through a runner between the movable die frame (23) and the upper die cavity (12) and the lower die cavity (24) to be ejected.
10. The internal thread demoulding structure according to claim 9, wherein the lower compound plate (21) is provided with a mould ejection hole (211), an ejection rod on the injection molding machine ejects the ejector pin (263) out of the surface of the movable mould frame (23) through the mould ejection hole (211) and the ejector pin compound plate (262), the reset spring (265) is compressed, after the ejector rod on the injection molding machine is retracted, the reset rod (264) drives the ejector pin compound plate (262) to reset under the action of the reset spring (265), and the ejector pin (263) is reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321609075.0U CN220163139U (en) | 2023-06-25 | 2023-06-25 | Demoulding structure of internal thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321609075.0U CN220163139U (en) | 2023-06-25 | 2023-06-25 | Demoulding structure of internal thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220163139U true CN220163139U (en) | 2023-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321609075.0U Active CN220163139U (en) | 2023-06-25 | 2023-06-25 | Demoulding structure of internal thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220163139U (en) |
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2023
- 2023-06-25 CN CN202321609075.0U patent/CN220163139U/en active Active
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