CN220219524U - Annular groove workpiece injection mold - Google Patents
Annular groove workpiece injection mold Download PDFInfo
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- CN220219524U CN220219524U CN202321509714.6U CN202321509714U CN220219524U CN 220219524 U CN220219524 U CN 220219524U CN 202321509714 U CN202321509714 U CN 202321509714U CN 220219524 U CN220219524 U CN 220219524U
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- annular groove
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- 238000002347 injection Methods 0.000 title claims abstract description 21
- 239000007924 injection Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
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Abstract
The utility model discloses an annular groove workpiece injection mold, which comprises an upper mold plate, an upper mold core, a lower mold base and a plurality of inserts, wherein the inserts are distributed in an annular shape, and the upper mold core, the lower mold core and the inserts are jointly enclosed to form a cavity; the upper die plate is provided with a pouring gate, the upper die core is provided with a runner, and two ends of the runner are respectively connected with the pouring gate and the cavity; the middle part of the lower die core is connected with a die core, and the top end of the die core extends into the die cavity; the mold core is in a round bar shape, a vent hole is formed in the mold core, a mouth is formed in the top end of the mold core, a cover plate covers the mouth, and the cover plate is connected with the mold core in a rotating mode through a pin shaft. In the ejection process, the mold core is separated from the workpiece, the cover plate is driven to rotate around the pin shaft by low air pressure in the workpiece, and air is filled into the workpiece through the vent hole, so that vacuum is prevented from being formed in the workpiece. The workpiece cannot deform, the friction force between the core and the workpiece is small, and the core cannot scratch the inside of the workpiece.
Description
Technical Field
The utility model relates to an injection mold for an annular groove workpiece, in particular to a mold withdrawing structure of the injection mold, and belongs to the technical field of molds.
Background
The injection mold has the advantages of high production speed, high efficiency, automation in operation, multiple varieties, simplified and complex shapes, large size and small size, and can process various workpieces with accurate product size. However, the conventional injection mold has disadvantages in that when the mold core is ejected out from the interior of the workpiece, vacuum is formed in the interior of the workpiece, and friction force between the mold core and the workpiece is large. The workpiece is deformed and the interior of the workpiece is scratched by the core. Therefore, how to avoid forming vacuum inside the workpiece during ejection is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In order to overcome the defects, the utility model aims to provide an annular groove workpiece injection mold.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an annular groove workpiece injection mold comprises an upper mold plate, an upper mold core, a lower mold base and a plurality of inserts, wherein the inserts are distributed in an annular shape, and the upper mold core, the lower mold core and the inserts are enclosed together to form a cavity; the upper die plate is provided with a pouring gate, the upper die core is provided with a runner, and two ends of the runner are respectively connected with the pouring gate and the cavity; the middle part of the lower die core is connected with a die core, and the top end of the die core extends into the die cavity; the mold core is in a round bar shape, a vent hole is formed in the mold core, a mouth is formed in the top end of the mold core, a cover plate covers the mouth, and the cover plate is connected with the mold core in a rotating mode through a pin shaft.
The utility model is further provided with: the bottom end of the core is connected with a plug, the plug is inserted into the vent hole, the center of the plug is provided with a valve, and the valve is communicated with the outside air; a first spring is arranged between the plug and the cover plate, the cover plate is tensioned by the first spring, and the cover plate covers the opening.
The utility model is further provided with: the middle part of the side surface of the embedded block is provided with a convex block, and the inside of the embedded block is provided with a chute; the lower surface of the upper die core is connected with a plurality of inclined guide rods, and the inclined guide rods are inserted into the inclined grooves.
The utility model is further provided with: the upper surface of lower mould benevolence is provided with a plurality of spouts, the lower surface of abaculus is connected with the slider, and the slider slides in the spout.
The utility model is further provided with: and a plurality of limiting blocks are connected to the lower surface of the upper die core.
The utility model is further provided with: an inner cavity is formed in the lower die holder, a push plate is arranged in the inner cavity, the upper surface of the push plate is connected with a push rod, the push rod penetrates through the lower die core, the top end of the push rod is connected with a top plate, and the top plate is arranged at the bottom of the die cavity; the lower surface of the lower die holder is connected with a cylinder, and the movable end of the cylinder penetrates through the lower die holder and stretches into the inner cavity to be connected with the push plate.
The utility model is further provided with: the push plate is also connected with a plurality of straight guide rods, the lower die core is provided with a plurality of guide holes, and the straight guide rods slide in the guide holes; the straight guide rod is sleeved with a second spring, one end of the second spring is abutted with the lower die core, and the other end of the second spring is abutted with the push plate.
Compared with the prior art, the utility model has the beneficial effects that: the core is inserted into the cavity by providing the core on the lower core. And forming a jack on a workpiece formed by the cavity. Through being provided with the air vent in the inside of core, the top of core is provided with the oral area, and the apron is closed to the upper cover of oral area, and the apron rotates with the core through the round pin axle to be connected. In the ejection process, the mold core is separated from the workpiece, the cover plate is driven to rotate around the pin shaft by low air pressure in the workpiece, and air is filled into the workpiece through the vent hole, so that vacuum is prevented from being formed in the workpiece. The workpiece cannot deform, the friction force between the core and the workpiece is small, and the core cannot scratch the inside of the workpiece.
Drawings
FIG. 1 is a schematic view of an injection mold for an annular groove workpiece according to a preferred embodiment of the utility model;
FIG. 2 is a schematic view of the structure of an annular groove workpiece injection mold in another state;
FIG. 3 is a schematic view of the structure of the workpiece, core and push plate.
In the figure: 1. an upper template; 2. a gate; 3. a workpiece; 4. an upper die core; 5. an inclined guide rod; 6. a limiting block; 7. a lower die core; 8. a flow passage; 9. a push rod; 10. a straight guide rod; 11. a second spring; 12. a lower die holder; 13. a top plate; 14. a cylinder; 15. a push plate; 16. a chute; 17. a slide block; 18. a chute; 19. an insert; 20. a core; 21. a pin shaft; 22. a cover plate; 23. a mouth; 24. a vent hole; 25. a plug; 26. a valve; 27. an annular groove; 28. a jack; 29. a bump; 30. a first spring; 31. and a guide hole.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
Referring to fig. 1-3, an injection mold for a workpiece with an annular groove in this embodiment is used for producing a workpiece 3, wherein the side surface of the workpiece 3 is an annular groove 27, and the bottom surface is provided with a jack 28. The annular groove workpiece injection mold comprises an upper mold plate 1, an upper mold core 4, a lower mold core 7, a lower mold base 12 and a plurality of inserts 19, wherein the inserts 19 are distributed in an annular shape, and the upper mold core 4, the lower mold core 7 and the inserts 19 are jointly enclosed to form a cavity; the upper die plate 1 is provided with a pouring gate 2, the upper die core 4 is provided with a runner 8, and two ends of the runner 8 are respectively connected with the pouring gate 2 and the die cavity; the middle part of the lower die core 7 is connected with a die core 20, and the top end of the die core 20 extends into the die cavity; the core 20 is in a round rod shape, a vent hole 24 is formed in the core 20, a mouth part 23 is formed in the top end of the core 20, a cover plate 22 is covered on the mouth part 23, and the cover plate 22 is rotatably connected with the core 20 through a pin shaft 21.
During ejection, the core 20 is separated from the workpiece 3, and the cover plate 22 is driven to rotate around the pin 21 by low air pressure in the workpiece 3, so that air is filled into the workpiece 3 through the vent holes 24, and vacuum is prevented from being formed in the workpiece 3. The workpiece 3 is not deformed, the friction force between the core 20 and the workpiece 3 is small, and the core 20 does not scratch the inside of the workpiece 3.
To control the movement of the cover 22, normally, the cover 22 is closed at the mouth 23, and the utility model is further arranged as follows: the bottom end of the core 20 is connected with a plug 25, the plug 25 is inserted into the vent hole 24, the center of the plug 25 is provided with a valve 26, and the valve 26 is communicated with the outside air; a first spring 30 is arranged between the plug 25 and the cover plate 22, the first spring 30 tightens the cover plate 22, and the cover plate 22 covers the opening 23. The pressure difference between the pressure of the insertion hole 28 of the workpiece 3 and the pressure difference between the air hole overcomes the elastic force of the first spring 30, so that the cover plate 22 is pushed to rotate around the pin shaft 21, and the air hole 24 is communicated with the insertion hole 28. Normally, the cover 22 covers the opening 23, and the injection molding material cannot pass through the opening 23.
In order to form the annular groove 27 in the side of the workpiece 3, the utility model is further arranged to: the middle part of the side surface of the embedded block 19 is provided with a convex block 29, and the inside of the embedded block 19 is provided with a chute 18; the lower surface of the upper die core 4 is connected with a plurality of inclined guide rods 5, and the inclined guide rods 5 are inserted into the inclined grooves 18. The projection 29 extends into the cavity, and the formed side surface of the workpiece 3 is provided with an annular groove 27 at the middle. When the upper die core 4 is separated from the lower die core 7, the inclined rod pushes the embedded block 19 to horizontally move, so that the embedded block 19 is separated from the workpiece 3, and the convex block 29 is separated from the workpiece 3.
In order to guide the horizontal rectilinear movement of the slug 19, the utility model is further arranged to: the upper surface of the lower die core 7 is provided with a plurality of sliding grooves 16, the lower surface of the embedded block 19 is connected with a sliding block 17, and the sliding block 17 slides in the sliding grooves 16. The insert 19 can slide only on the upper surface of the lower core 7.
The utility model is further provided with: the lower surface of the upper die core 4 is connected with a plurality of limiting blocks 6. The limiting block 6 not only limits the position of the insert 19, but also can push the insert 19 to move towards the cavity when the upper die core 4 is in butt joint with the lower die core 7.
In order to eject the workpiece 3, the present utility model is further provided with: an inner cavity is formed in the lower die holder 12, a push plate 15 is arranged in the inner cavity, the upper surface of the push plate 15 is connected with a push rod 9, the push rod 9 penetrates through the lower die core 7, the top end of the push rod 9 is connected with a top plate 13, and the top plate 13 is arranged at the bottom of the cavity; the lower surface of the lower die holder 12 is connected with a cylinder 14, and the movable end of the cylinder 14 penetrates through the lower die holder 12 and stretches into the inner cavity to be connected with the push plate 15. The cylinder 14 is started to push the push plate 15 and the ejector rod 9 to move upwards, the ejector rod 9 pushes the top plate 13 to move upwards, the top plate 13 carries the workpiece 3 to move upwards, and the position is unchanged because the core 20 is fixedly connected with the lower die core 7, so that the core 20 is separated from the workpiece 3.
In order to guide the direction of movement of the push plate 15, the present utility model is further configured to: the push plate 15 is also connected with a plurality of straight guide rods 10, the lower die core 7 is provided with a plurality of guide holes 31, and the straight guide rods 10 slide in the guide holes 31; the straight guide rod 10 is sleeved with a second spring 11, one end of the second spring 11 is abutted against the lower die core 7, and the other end is abutted against the push plate 15. The straight guide bar 10 and the guide hole 31 guide the movement direction of the push plate 15 together. The second spring 11 urges the push plate 15 to return.
In summary, the principle of the injection mold for the annular groove workpiece shown in the utility model is as follows: the upper die core 4, the lower die core 7 and the embedded block 19 are enclosed together to form a die cavity; a top plate 13 is provided at the bottom of the mould cavity. And injecting plastic into the cavity through the gate 2 and the runner 8, and cooling to form the workpiece 3. During demolding, the upper die core 4 moves upwards, the inclined guide rod 5 pushes the embedded block 19 to move, the embedded block 19 moves horizontally in a straight line under the guidance of the sliding block 17 and the sliding groove 16, and the convex block 29 is pulled out of the annular groove 27 of the workpiece 3. The cylinder 14 is started to push the push plate 15 and the ejector rod 9 to move upwards, the ejector rod 9 pushes the top plate 13 to move upwards, the top plate 13 carries the workpiece 3 to move upwards, and the position is unchanged due to the fact that the core 20 is fixedly connected with the lower die core 7, and therefore the core 20 is separated from the workpiece 3. During ejection, the low air pressure inside the workpiece 3 causes the cover plate 22 to rotate around the pin 21, and air is filled into the workpiece 3 through the vent holes 24, so that vacuum is prevented from being formed inside the workpiece 3. The workpiece 3 is not deformed by the internal vacuum, and the workpiece 3 is protected from being scratched by the core 20.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.
Claims (7)
1. An annular groove workpiece injection mold comprises an upper mold plate, an upper mold core, a lower mold base and a plurality of inserts, wherein the inserts are distributed in an annular shape, and the upper mold core, the lower mold core and the inserts are enclosed together to form a cavity; the upper die plate is provided with a pouring gate, the upper die core is provided with a runner, and two ends of the runner are respectively connected with the pouring gate and the cavity; the middle part of the lower die core is connected with a die core, and the top end of the die core extends into the die cavity;
the mold core is in a round rod shape, a vent hole is formed in the mold core, a mouth is formed in the top end of the mold core, a cover plate is covered on the mouth, and the cover plate is connected with the mold core in a rotating mode through a pin shaft.
2. The annular groove workpiece injection mold of claim 1, wherein a plug is connected to the bottom end of the core, the plug is inserted into the vent hole, and a valve is arranged in the center of the plug and is communicated with the outside air; a first spring is arranged between the plug and the cover plate, the cover plate is tensioned by the first spring, and the cover plate covers the opening.
3. The annular groove workpiece injection mold of claim 2, wherein the middle of the side surface of the insert is provided with a bump, and the inside of the insert is provided with a chute; the lower surface of the upper die core is connected with a plurality of inclined guide rods, and the inclined guide rods are inserted into the inclined grooves.
4. The injection mold of the annular groove workpiece according to claim 3, wherein a plurality of sliding grooves are formed in the upper surface of the lower mold core, and a sliding block is connected to the lower surface of the insert and slides in the sliding grooves.
5. The annular groove workpiece injection mold of claim 4, wherein a plurality of limiting blocks are connected to the lower surface of the upper mold core.
6. The annular groove workpiece injection mold of claim 5, wherein an inner cavity is formed in the lower mold base, a push plate is arranged in the inner cavity, a push rod is connected to the upper surface of the push plate, the push rod penetrates through the lower mold core, a top plate is connected to the top end of the push rod, and the top plate is arranged at the bottom of the cavity; the lower surface of the lower die holder is connected with a cylinder, and the movable end of the cylinder penetrates through the lower die holder and stretches into the inner cavity to be connected with the push plate.
7. The annular groove workpiece injection mold of claim 6, wherein the push plate is further connected with a plurality of straight guide rods, the lower mold core is provided with a plurality of guide holes, and the straight guide rods slide in the guide holes; the straight guide rod is sleeved with a second spring, one end of the second spring is abutted with the lower die core, and the other end of the second spring is abutted with the push plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321509714.6U CN220219524U (en) | 2023-06-14 | 2023-06-14 | Annular groove workpiece injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321509714.6U CN220219524U (en) | 2023-06-14 | 2023-06-14 | Annular groove workpiece injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220219524U true CN220219524U (en) | 2023-12-22 |
Family
ID=89185914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321509714.6U Active CN220219524U (en) | 2023-06-14 | 2023-06-14 | Annular groove workpiece injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220219524U (en) |
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2023
- 2023-06-14 CN CN202321509714.6U patent/CN220219524U/en active Active
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| GR01 | Patent grant | ||
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