CN210501248U - Injection mold thimble - Google Patents
Injection mold thimble Download PDFInfo
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- CN210501248U CN210501248U CN201921310432.7U CN201921310432U CN210501248U CN 210501248 U CN210501248 U CN 210501248U CN 201921310432 U CN201921310432 U CN 201921310432U CN 210501248 U CN210501248 U CN 210501248U
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- rod
- hook
- push
- shaped notch
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to an injection mold thimble, belonging to the technical field of thimbles, which comprises a rod body, wherein one end of the rod body is fixedly connected with a fixed part, the circumferential surface of the rod body is provided with a hook-shaped gap, the hook-shaped notch is arranged at the end part of the rod body far away from the fixing part, the pushing assembly is arranged at the end part of the rod body and comprises a pushing block, a pushing rod and an elastic part, the pushing rod comprises a rotating rod and a sliding rod, a pushing groove is formed in the bottom of the hook-shaped notch, the pushing block is arranged in the pushing groove in a sliding mode, the top of the pushing block is rotatably connected with the sliding rod, the sliding rod is inserted into one end of the rotating rod and is slidably connected with the rotating rod, the middle of the rotating rod is hinged with the rod body, a placing groove is formed in one side, away from the hook, and the one end of spring and the tip fixed connection of fixed part are kept away from to the dwang, the utility model discloses have the effect that makes injection moulding product and thimble break away from more easily.
Description
Technical Field
The utility model belongs to the technical field of the technique of thimble and specifically relates to an injection mold thimble is related to.
Background
The ejector pin is a mold accessory used for achieving the functions of ejection or stabilization and the like at present, and the ejector pin is widely applied to a mold, for example, the ejector pin is installed in an installation hole in the mold, when a molded product needs to be ejected, a rod body of the ejector pin of the mold extends out of the installation hole, the molded product or a flow channel is ejected out of the mold, and the molded product or the flow channel is separated from the mold.
The prior chinese patent with reference to publication No. CN104723515A discloses a thimble structure of a mold, which includes: the thimble rod body is cylindrical; the material pulling head is arranged at the front part of the thimble rod body and is provided with a hook-shaped notch; the boss is arranged at the front part of the ejector pin rod body, the diameter of the cross section of the boss is smaller than that of the cross section of the ejector pin rod body, and the boss is arranged at the extending position of the center of the ejector pin rod body.
The above prior art solutions have the following drawbacks: in the process of injection molding, molten plastic fills the whole hook-shaped notch, the hook-shaped notch is formed after cooling and solidification, in the process of mold opening, after the ejector pin ejects an injection molding product, for the product with certain viscosity and smaller weight in the ejector pin, the hook-shaped part is not easy to separate from the hook-shaped notch, so that the injection molding product is not easy to separate from the ejector pin.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an injection mold thimble that makes injection product and thimble break away from more easily.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
an injection mold thimble comprises a rod body, wherein one end of the rod body is fixedly connected with a fixed part, a hook-shaped notch is formed in the circumferential surface of the rod body, a pushing assembly is arranged at the end part of the rod body and comprises a pushing block, a pushing rod and an elastic part, the pushing rod comprises a rotating rod and a sliding rod, a pushing groove is formed in the bottom of the hook-shaped notch, the pushing block is arranged in the pushing groove in a sliding manner, the top of the pushing block is rotatably connected with the sliding rod, the rotating axis of the sliding rod is perpendicular to the axis of the rod body, the sliding rod is inserted into one end of the rotating rod and is slidably connected with the rotating rod, the middle position of the rotating rod is hinged with the rod body, the hinged axis of the rotating rod is parallel to the rotating axis of the sliding rod, the hinged axis of the rotating rod is positioned on one side of the sliding rod, which is far away from the hook-shaped notch, the spring is fixedly connected with the rod body, one end of the spring is fixedly connected with the end part of the rotating rod far away from the fixing part, and the spring is located between the hook-shaped notch and the rotating rod.
By adopting the technical scheme, the rod body is arranged in the mounting hole of the rear die of the die in a sliding manner, during injection molding, the rod body is positioned in the mounting hole of the die, molten plastic fills the whole hook-shaped gap, the hook-shaped gap is formed after cooling and solidification, the thimble slides in the mounting hole in the die opening process, a molded product is ejected out, the molded product at the hook-shaped gap provides stretching force for an injection molded sample to move towards the rear die, the sample is prevented from instantly flying to the front die and damaging the front die surface, meanwhile, the push rod gradually slides out along with the thimble gradually sliding out of the mounting hole and is gradually exposed, then one end of the push rod is pushed by the elastic piece to be gradually far away from the rod body, so that the push rod rotates, the end part of the push rod far away from the elastic piece drives the push block to move towards the direction close to the hook-shaped gap, thereby the push block can push out a product, the ejector pin moves in the direction opposite to the ejection direction of the ejector pin after the injection product is pushed out, when the push rod contacts the inner wall of the mounting hole, the push rod continues to move and is pressed by the mounting hole and gradually moves towards the direction close to the rod body, the push rod rotates to drive the push block to gradually move towards the direction away from the configuration notch until the push rod completely falls into the placing groove, at the moment, the elastic piece is compressed, the push block moves out of the hook-shaped notch, the push block is automatically pushed out when the ejector pin is ejected out, the push block automatically moves out of the hook-shaped notch when the ejector pin retracts, and the push block can be matched with the ejector pin in movement.
The utility model discloses further set up to: each transition position of the hook-shaped notch is set to be a round angle.
By adopting the technical scheme, the stretching stress at the brother position of the hook-shaped notch is more dispersed, the breakage of the hook formed at the hook-shaped notch after curing due to stress concentration is avoided, and the stretching effect of the hook formed at the hook-shaped notch on an injection molding product is ensured.
The utility model discloses further set up to: the width of the hook-shaped notch is one third to one half of the diameter of the rod body.
Through adopting above-mentioned technical scheme, the width setting of hook type breach makes the part after hook type breach department cooling solidification can give the shaping product and moulds plastics the sample and move the direction tensile force toward the back mould, avoids the sample to fly to the front mould in the twinkling of an eye, bumps the front mould face, simultaneously, makes the tip of the body of rod can keep certain intensity to the tip that makes the body of rod is not fragile.
The utility model discloses further set up to: the ejector pad fixedly connected with draw runner, the body of rod is seted up with the spout of draw runner looks adaptation.
Through adopting above-mentioned technical scheme, the spout plays limiting displacement to the draw runner, makes the draw runner only can remove along the direction of spout to make the ejector pad can remove along the spout direction, guaranteed the stability of the removal of ejector pad.
The utility model discloses further set up to: the one end of fixed part and the one side fixedly connected with arch of keeping away from the elastic component are kept away from to the dwang, and the arch is close to the outer wall of push rod along the direction that is close to the fixed part gradually.
By adopting the technical scheme, the bulge is gradually close to the outer wall of the push rod along the direction close to the fixing part, so that one side of the bulge facing the mounting hole is an inclined plane, when the rod body retracts into the mounting hole, when the end of the mounting hole contacts the inclined slope of the protrusion, the protrusion is guided by the inclined slope of the protrusion, so that the protrusion is prevented from being clamped by the mounting hole, the push rod can further rotate due to the arrangement of the protrusion, thereby ensuring that one end of the push rod far away from the elastic piece can move a far distance to the direction far away from the hook-shaped notch, and then the push rod can drive the ejector pad to remove far distance to the direction of keeping away from the hook-shaped breach, makes the push rod can have great size along the direction of seting up of promoting the groove, can release the longer distance in hook-shaped breach bottom when the ejector pad is released, can be longer to injection moulding product's promotion distance promptly, makes injection moulding product and thimble break away from more easily.
The utility model discloses further set up to: the end part of the push block close to the hook-shaped notch is fixedly connected with a push plate, and the radian of the push plate is the same as that of the push plate in the hook-shaped notch.
Through adopting above-mentioned technical scheme, the area of push pedal and injection moulding product contact is greater than the area of ejector pad and injection moulding product contact, and the push pedal has increased the area of contact between ejector pad and the injection moulding product, and the driving force that makes injection moulding product receive is more even.
The utility model discloses further set up to: the inner surface of the hook-shaped notch is provided with a push groove, and when the push plate is positioned in the push groove, the surface of the push plate, which is far away from the push block, is flush with the surface of the hook-shaped notch.
Through adopting above-mentioned technical scheme, when the body of rod is not ejecting, the push pedal just is located and pushes away the inslot, and the surface that the ejector pad was kept away from to the push pedal flushes with the surface of hook type breach, and during moulding plastics, when the hook type breach was filled to melting plastic, just filled to the surface of push pedal, the surface that forms the position of moulding plastics of similar hook shape after making the cooling solidification is comparatively level and smooth, is separated with the hook type breach relatively when being promoted by the ejector pad to injection moulding product is easier and the body of rod separation.
The utility model discloses further set up to: the elastic piece is a spring.
Through adopting above-mentioned technical scheme, the spring is yielding, and elasticity is big, receives the pressure of push rod, and the spring is compressed promptly and produces the deformation, and the spring produces elasticity promptly, breaks away from the mounting hole after the body of rod, and the spring is about to the push rod release to the push rod drives the ejector pad and removes, and the spring has guaranteed that the ejector pad can produce certain thrust to injection moulding product.
To sum up, the utility model discloses a beneficial technological effect does:
1. through the arrangement of the material pushing assembly, the injection product falls down under the combined action of the gravity of the injection product and the thrust of the pushing block, so that the injection product is separated from the ejector pin and is easily separated from the ejector pin;
2. all transition positions of the hook-shaped notch are arranged to be round corners, so that the breakage of a hook formed at the hook-shaped notch after curing due to stress concentration is avoided, and the stretching effect of the hook formed at the hook-shaped notch on an injection molding product is ensured;
3. through setting up the board, the push pedal has increased the area of contact between ejector pad and the injection moulding product, and the driving force that makes the injection moulding product receive is more even.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a cross-sectional view showing the ejection state of the rod body according to the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
fig. 4 is a cross-sectional view of the non-ejection state of the rod body according to the present invention.
In the figure, 1, a rod body; 11. a fixed part; 12. a chute; 2. a hook-shaped notch; 21. a push groove; 22. pushing the groove; 3. a material pushing assembly; 31. a push block; 311. a slide bar; 312. pushing the plate; 32. a push rod; 321. rotating the rod; 3211. a protrusion; 322. a slide bar; 33. an elastic member; 4. a rear mold; 41. and (7) installing holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, an injection mold thimble disclosed by the present invention comprises a rod body 1, a fixing portion 11 fixedly connected to one end of the rod body 1, a hook-shaped notch 2 formed on a circumferential surface of the rod body 1, and the hook-shaped notch extends from the end of the rod body 1 far away from the fixing part 11 to the direction close to the fixing part 11, the opening depth of the hook-shaped notch is gradually increased and then gradually decreased, all transition positions of the hook-shaped notch 2 are arranged in a round angle, the width of the hook-shaped notch 2 is one third to one half of the diameter of the rod body 1, the end part of the rod body 1 is provided with a material pushing component 3, after the rod body 1 is ejected, the pushing component 3 can push out a product formed by cooling in the hook-shaped notch, so that the product falls down under the combined action of the gravity of the product and the pushing force of the pushing component 3 after being pushed out by the rod body 1, and the injection product is easy to separate from the ejector pin.
Referring to fig. 2 and 3, the pushing assembly 3 includes a pushing block 31, a pushing rod 32 and an elastic member 33, the elastic member 33 is a spring, the bottom of the hook-shaped notch is provided with a pushing groove 21, the opening direction of the pushing groove 21 is perpendicular to the axis of the rod body 1, the pushing block 31 is slidably arranged in the pushing groove 21, the pushing block 31 is fixedly connected with a sliding strip 311, the rod body 1 is provided with a sliding groove 12 matched with the sliding strip 311, and the opening direction of the sliding groove 12 is the same as the opening direction of the pushing groove 21; the push rod 32 comprises a rotating rod 321 and a sliding rod 322, a placing groove is formed in one side of the rod body 1, which is far away from the hook-shaped notch 2, the push rod 32 is positioned in the placing groove, the top of the push block 31 is rotatably connected with the sliding rod 322, the rotating axis of the sliding rod 322 is perpendicular to the axis of the rod body 1 and perpendicular to the opening direction of the push groove 21, the sliding rod 322 is inserted into one end of the rotating rod 321 and is slidably connected with the rotating rod 321, the sliding direction of the sliding rod 322 is consistent with the length directions of the sliding rod 322 and the rotating rod 321, the middle position of the rotating rod 321 is hinged with the rod body 1, the hinged axis of the rotating rod 321 is parallel to the rotating axis of the sliding rod 322, the hinged axis of the rotating rod 321 is positioned on one side of the sliding rod 322, one end of the push rod 32, which is far away from the fixing part 11, can extend out of the side surface of the rod, the two ends of the spring are respectively fixedly connected with the rod body 1 and the end part of the rotating rod 321 far away from the fixing part 11.
Referring to fig. 2 and 4, after the injection molding product is cooled and molded, the thimble is gradually ejected in the mounting hole 41, the rotating rod 321 is separated from the mounting hole 41, then one end of the rotating rod 321 is pushed by the elastic member 33 to be away from the rod body 1, so that the rotating rod 321 is driven by the elastic member 33 to rotate, the rotating rod 321 is rotated to drive the sliding rod 322 to rotate, meanwhile, the sliding rod 322 slides relative to the rotating rod 321, the end part of the sliding rod 322, which is far away from the elastic member 33, drives the push block 31 to move towards the direction close to the hook-shaped notch 2 along the push groove 21, so that the push block 31 can push out the product formed in the hook-shaped notch 2, so that the injection molding product falls under the combined action of self gravity and the push block 31.
Referring to fig. 2 and 4, a protrusion 3211 is fixedly connected to one side of the rotating rod 321, which is away from the end of the fixing portion 11 and away from the elastic element 33, when the rod body 1 is in a non-ejected state, the protrusion 3211 abuts against an inner wall of the mounting hole 41, the protrusion 3211 gradually approaches an outer wall of the push rod 32 along a direction close to the fixing portion 11, the protrusion 3211 further rotates the rotating rod 321 to drive the push block 31 to move towards a direction away from the hook-shaped notch, and then the push rod 32 can drive the push block 31 to move towards a direction away from the hook-shaped notch for a longer distance, so that the push rod 32 can have a larger size along an opening direction of the push groove 21, and the push block 31 can make a longer pushing distance of an injection molding product, so; tip fixedly connected with push pedal 312 that ejector pad 31 is close to hook type breach 2, the radian in push pedal 312 and hook type breach 2 is the same, push away groove 22 has been seted up to the internal surface of hook type breach 2, when push pedal 312 is located and pushes away the groove 22, the surface that push pedal 312 kept away from ejector pad 31 flushes with the surface of hook type breach 2, when the body of rod 1 is not ejecting, push pedal 312 just is located and pushes away the groove 22, the surface that push pedal 312 kept away from ejector pad 31 flushes with the surface of hook type breach 2, it is comparatively level and smooth to form the surface at the position of moulding plastics of similar hook shape after the cooling solidification, it separates with the hook type breach relatively when being promoted by ejector pad 31, thereby injection moulding product is easy to separate with the.
The implementation principle of the embodiment is as follows: the body of rod 1 slides in the mounting hole 41 of the back mould 4 of mould and sets up, when moulding plastics, the one end that fixed part 11 was kept away from to the body of rod 1 flushes with the surface of back mould 4 orientation front mould, whole hook-shaped breach 2 is filled to the melting plastic, form similar hook shape after the cooling solidification, at the die sinking in-process, the thimble slides in mounting hole 41, it is ejecting with the shaping product, the shaping product of hook-shaped breach department is for moulding plastics the sample toward 4 moving direction tensile forces of back mould, avoid the sample to fly to the front mould in the twinkling of an eye, the front mould face is bruised.
Simultaneously, slide out gradually in mounting hole 41 along with the thimble, dwang 321 breaks away from mounting hole 41, then the one end of dwang 321 is promoted by elastic component 33 and is kept away from the body of rod 1 gradually, thereby dwang 321 is driven and rotates by elastic component 33, dwang 321 rotates and drives slide bar 322 and rotate, slide bar 322 slides with dwang 321 relatively simultaneously, slide bar 322 keeps away from the tip of elastic component 33 and drives ejector pad 31 and remove to the direction that is close to hook type breach 2 along promoting groove 21, thereby ejector pad 31 can release the product that forms in hook type breach 2, make the product of moulding plastics whereabouts by self gravity and ejector pad 31's thrust combined action, make the product of moulding plastics break away from with the thimble and change and break away from with the thimble.
After the injection product is pushed out, the ejector pin moves towards the direction opposite to the self-ejection direction, when the part of the push rod 32 far away from the fixed part 11 firstly contacts the inner wall of the mounting hole 41, the push rod 32 continues to move and gradually bears the pressure of the mounting hole 41, the end part of the push rod 32 far away from the fixed part 11 gradually moves towards the direction close to the rod body 1, so that the push rod 32 rotates around the rotation axis of the push rod 32, the push rod 32 rotates to drive the push block 31 to gradually move towards the direction far away from the configuration notch along the push groove 21 until the push rod 32 completely falls into the placing groove, at the moment, the elastic element 33 is compressed, the push block 31 moves out of the hook-shaped notch, the effect that the push block 31 is automatically pushed out when the ejector pin is ejected out, and the.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides an injection mold thimble, includes the body of rod (1), the one end fixedly connected with fixed part (11) of the body of rod (1), its characterized in that: hook-shaped breach (2) have been seted up to the circumference face of the body of rod (1), the tip of the body of rod (1) is provided with pushes away material subassembly (3), it includes ejector pad (31) to push away material subassembly (3), push rod (32) and elastic component (33), push rod (32) include dwang (321) and slide bar (322), push away groove (21) have been seted up to the bottom of hook-shaped breach, ejector pad (31) slide in push away groove (21) and set up, the top and the slide bar (322) of ejector pad (31) rotate to be connected, and the axis of rotation of slide bar (322) is perpendicular to the axis of the body of rod (1), slide bar (322) are inserted and are located the one end of dwang (321) and with dwang (321) sliding connection, the middle part position of dwang (321) is articulated with the body of rod (1), the articulated axis of dwang (321) is parallel with the axis of rotation of slide bar (322), the articulated axis of dwang (321) is located the one, the standing groove has been seted up to one side that the body of rod (1) deviates from hook type breach (2), and push rod (32) are located the standing groove, and the one end that fixed part (11) were kept away from in push rod (32) can be followed the side that the body of rod (1) stretched out the standing groove beyond, spring and body of rod (1) fixed connection, and the tip fixed connection of fixed part (11) is kept away from with dwang (321) to the one end of spring, and the spring is located between hook type breach (2) and dwang (321).
2. The ejector pin of the injection mold according to claim 1, wherein: and all transition positions of the hook-shaped notch (2) are set by round corners.
3. The ejector pin of the injection mold according to claim 1, wherein: the width of the hook-shaped notch (2) is one third to one half of the diameter of the rod body (1).
4. The ejector pin of the injection mold according to claim 1, wherein: the push block (31) is fixedly connected with a sliding strip (311), and the rod body (1) is provided with a sliding groove (12) matched with the sliding strip (311).
5. The ejector pin of the injection mold according to claim 1, wherein: the one end of fixed part (11) and the one side fixedly connected with arch (3211) of keeping away from elastic component (33) are kept away from in dwang (321), arch (3211) is close to the outer wall of push rod (32) along the direction that is close to fixed part (11) gradually.
6. The ejector pin of the injection mold according to claim 1, wherein: the end part of the push block (31) close to the hook-shaped notch (2) is fixedly connected with a push plate (312), and the radian of the push plate (312) is the same as that of the hook-shaped notch (2).
7. The ejector pin of the injection mold according to claim 6, wherein: the inner surface of the hook-shaped notch (2) is provided with a push groove (22), and when the push plate (312) is positioned in the push groove (22), the surface of the push plate (312) far away from the push block (31) is flush with the surface of the hook-shaped notch (2).
8. The ejector pin of the injection mold according to claim 1, wherein: the elastic member (33) is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921310432.7U CN210501248U (en) | 2019-08-13 | 2019-08-13 | Injection mold thimble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921310432.7U CN210501248U (en) | 2019-08-13 | 2019-08-13 | Injection mold thimble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210501248U true CN210501248U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921310432.7U Active CN210501248U (en) | 2019-08-13 | 2019-08-13 | Injection mold thimble |
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| CN (1) | CN210501248U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115556309A (en) * | 2022-09-16 | 2023-01-03 | 温州意华接插件股份有限公司 | Barb plastic part mold and demolding method thereof |
-
2019
- 2019-08-13 CN CN201921310432.7U patent/CN210501248U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115556309A (en) * | 2022-09-16 | 2023-01-03 | 温州意华接插件股份有限公司 | Barb plastic part mold and demolding method thereof |
| CN115556309B (en) * | 2022-09-16 | 2024-04-09 | 温州意华接插件股份有限公司 | Barb plastic part mold and demolding method thereof |
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