CN217752597U - Helical gear injection mold - Google Patents
Helical gear injection mold Download PDFInfo
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- CN217752597U CN217752597U CN202221730458.9U CN202221730458U CN217752597U CN 217752597 U CN217752597 U CN 217752597U CN 202221730458 U CN202221730458 U CN 202221730458U CN 217752597 U CN217752597 U CN 217752597U
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Abstract
The utility model discloses a helical gear injection mold, including the last mold core mechanism that has the injecting glue runner and the lower mold mechanism of mutually supporting, lower mold mechanism includes from last to the lower bolster that distributes in proper order down, lower die carrier plate and die holder, be equipped with at least two first mold core subassemblies in the lower bolster and first mold core subassembly cooperation are with the second mold core subassembly that forms the injection molding die cavity, first mold core subassembly is including locating the mold core section of thick bamboo that the cover was located in the lower bolster and locating the fixed core in the mold core section of thick bamboo inner chamber, second mold core subassembly includes actuating mechanism, the removal passageway, the removal guide block, return pole and removal core, be equipped with the thimble that can push out the work piece in the die holder, actuating mechanism drive removal guide block is far away from the mold core section of thick bamboo, and the work piece is in the ejecting process of thimble, the work piece drives the horizontal rotation of mold core section of thick bamboo and thus makes the work piece deviate from the injection molding die cavity; after the workpiece is demoulded, the driving mechanism drives the movable guide block to be close to the die core cylinder and pushes the die core cylinder to return by using the return rod, so that the workpiece is demoulded conveniently, and the die structure is optimized.
Description
Technical Field
The utility model belongs to the technical field of the injection molding processing, concretely relates to helical gear injection mold.
Background
The plastic helical gear is widely applied in modern industry, and compared with a metal helical gear, the plastic helical gear has the advantages of light weight, low running noise, good self-lubricating property and the like. The plastic helical gear is mainly formed by injection molding of a mold and has the characteristics of high efficiency and low cost.
However, due to the special structure of helical teeth such as a plastic helical gear, the problem of difficult demoulding exists in the practical production, and in the prior art, an oil cylinder is usually adopted to demould the helical gear, and a screw is rotated by a rack driving gear to drive a workpiece to rotate and eject for demoulding. However, such a demolding method has a complicated structure, high cost, and increased failure conditions, which affects production efficiency.
SUMMERY OF THE UTILITY MODEL
To the injection mold in the past that prior art exists, the demolding design is complicated, and the trouble influences production efficiency's technical problem more easily, the utility model provides a helical gear injection mold.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a helical gear injection mold comprises an upper mold mechanism with an injection runner and a lower mold mechanism matched with the upper mold mechanism and arranged below the upper mold mechanism, wherein the lower mold mechanism comprises a lower mold plate, a lower mold bearing plate and a lower mold base which are sequentially distributed from top to bottom, and at least two first mold core assemblies and a second mold core assembly which can be matched with the two first mold core assemblies to form an injection molding cavity are arranged in the lower mold plate;
the first mold core component comprises a mold core barrel and a fixed core, the mold core barrel is arranged in the lower template in a sleeved mode, the fixed core is arranged in an inner cavity of the mold core barrel, the mold core barrel can horizontally rotate in the lower template, the mold core barrel is provided with a fixed portion connected with the second mold core component, an inclined tooth forming groove adjacent to the fixed portion is formed in the inner wall of the mold core barrel, and the fixed core is provided with a plurality of material ejecting cavities vertically penetrating through the fixed core;
the second mold core component comprises a moving channel arranged in the lower template, a driving mechanism positioned on one side of the moving channel and connected with the lower template, a moving guide block connected with the output end of the driving mechanism, a moving core arranged on the moving guide block and respectively connected with two mold core barrels, and two return rods respectively arranged on one side of the moving core and respectively connected with the moving guide block, wherein the moving core is provided with a moving forming groove matched with the inclined tooth forming groove, the moving forming groove and the inclined tooth forming groove are matched with each other to form an injection molding cavity, and the fixed cores are distributed in the injection molding cavity;
the lower die base is internally provided with an ejector pin capable of moving back and forth in the ejector cavity, before the ejector pin ejects a workpiece, the driving mechanism drives the movable guide block to be away from the die core cylinder, and in the process that the workpiece is ejected by the ejector pin, the workpiece drives the die core cylinder to rotate horizontally, so that the workpiece is ejected from the injection molding cavity; and after the workpiece is demoulded, the driving mechanism drives the movable guide block to be close to the mold core barrel and pushes the mold core barrel to return by using the return rod.
Furthermore, the lower template is provided with two installation cavities distributed at intervals, the installation cavities are distributed on one side of the moving channel, a first through groove for the moving core to move and adjacent to the installation cavity is formed between the installation cavities and the moving channel, and a second through groove for the return rod to move back and forth is further formed in one side of the installation cavity.
Further, the fixed part is installed in the installation cavity, the fixed part include with a first horizontal plane that the inner chamber of mold core section of thick bamboo borders on, with the perpendicular that first horizontal plane is connected, with the perpendicular connect distribute in the second horizontal plane of skewed tooth shaping groove one side, with inclined plane that the second horizontal plane is connected, with the perpendicular connect distribute in the third horizontal plane of skewed tooth shaping groove opposite side and with the arc surface that the third horizontal plane is connected, the second horizontal plane with third horizontal plane top surface is in same straight line.
Further, the helical tooth forming groove is provided with a vertical surface adjacent to the circular arc surface.
Furthermore, the movable core horizontally moves back and forth in the first through groove and is connected with the fixing part, the movable forming grooves are distributed at the end part of the connecting end of the movable core, one side of each movable forming groove is provided with an abutting part abutted against the vertical surface, the other side of each movable forming groove is provided with a pointed convex part, and the pointed convex parts are clamped in a clamping cavity formed by the second horizontal surface and the inclined surface; an L-shaped connecting part which is abutted against the vertical surface and the first horizontal surface is arranged below the movable forming groove, one end of the L-shaped connecting part is abutted against the pointed convex part, and the other end of the L-shaped connecting part is provided with an arc-shaped recess for accommodating the die core barrel part.
Furthermore, guide blocks located on two sides of the moving channel are arranged in the moving channel, and guide grooves matched with the guide blocks are formed in the positions, corresponding to the guide blocks, of the moving guide blocks.
Further, the driving mechanism is connected to the outer portion of the lower template through a bolt.
Furthermore, the return rod horizontally moves back and forth in the second through grooves, and two guide bearings which are arranged at intervals are mounted on one side of each second through groove and are used for being in contact with and guiding the return rod.
Furthermore, the lower die holder comprises a bottom plate, side plates arranged on two sides of the bottom plate, ejector plates arranged between the side plates and ejector pin bearing plates distributed above the ejector plates, the ejector pins are vertically connected to the ejector pin bearing plates, and the ejector plates are in threaded connection with the ejector pin bearing plates.
Furthermore, a plurality of self-resetting springs are arranged between the thimble bearing plate and the lower die bearing plate.
To sum up, the beneficial effects of the utility model are that: on one hand, the device is specially designed according to the shape of a processed workpiece, and the precision of a finished product is guaranteed to be higher. On the other hand, thereby come the cooperation through rotatory core section of thick bamboo and mobilizable removal core and put into the injection molding die cavity with fixed core, accomplish the back of moulding plastics, it keeps away from to drive the removal core through actuating mechanism, utilize the thimble to push out the work piece perpendicularly in the liftout intracavity this moment, because of work piece self is the skewed tooth structure, can drive rotatory model = core section of thick bamboo and work piece and break away from, the demolding smoothly, such drawing of patterns mode, moreover, the steam generator is simple in structure, the simple operation, no longer need many and complicated gear or rack structure, help promoting work efficiency.
Drawings
Fig. 1 is a schematic structural view of the helical gear injection mold provided by the utility model.
Fig. 2 is a schematic view of the three-dimensional structure of the middle and lower templates of the present invention.
Fig. 3 is a schematic view of the injection mold cavity of fig. 2 after processing.
Fig. 4 is a partially enlarged view of a portion a in fig. 3.
Fig. 5 is a schematic view of the construction of the die cartridge of fig. 2 with and without a fixed core assembled.
Fig. 6 is a schematic structural view of the middle fixing core of the present invention not connected with the mold core cylinder and connected with the mold core cylinder.
Fig. 7 is a schematic perspective view of the middle movable guide block of the present invention.
FIG. 8 is a schematic view of the manufactured cost structure of the injection mold.
In the drawing, 100-upper die mechanism, 110-first upper die plate, 111-glue injection opening, 120-second upper die plate, 130-third upper die plate, 200-lower die mechanism, 210-lower die plate, 211-guide bearing, 212-guide block, 220-lower die carrier plate, 230-lower die holder, 231-bottom plate, 232-side plate, 233-ejector plate, 234-ejector plate, 2340-self-reset spring, 300-first die core assembly, 310-die core barrel, 311-skewed tooth forming groove, 3110-vertical surface, 312-first horizontal surface, 313-vertical surface, 314-second horizontal surface, 315-sloped surface, 316-third horizontal surface, 317-arc surface, 320-fixed core, 321-ejector cavity, 400-second die core assembly, 410-moving channel, 420-driving mechanism, 430-moving guide block, 440-moving core convex part, 441-moving forming groove, 442-abutting part, 443-tip, 444-L-shaped recess, 445-arc-shaped recess, 446-arc-shaped guide groove, 446-return rod 500-return rod.
Detailed Description
The present invention will be further described with reference to the following specific drawings.
As shown in fig. 1 and 2, the utility model provides a helical gear injection mold, including last mold mechanism 100 that has the injecting glue runner and with last mold mechanism 100 mutually support and locate the lower mold mechanism 200 of last mold mechanism 100 below. The upper die mechanism 100 includes a first upper die plate 110, a second upper die plate 120, and a third upper die plate 130 sequentially arranged from top to bottom, and the top surface of the first upper die plate 110 is provided with a glue injection port 111 for injecting the fusing material into the glue injection flow channel. After the upper die mechanism 100 and the lower die mechanism 200 are assembled, the third upper die plate 130 is connected with the lower die mechanism 200, at least two connecting columns are arranged on the third upper die plate 130, and a glue injection runner communicated with the glue injection port 111 is arranged in each connecting column. The lower mold mechanism 200 includes a lower mold plate 210, a lower mold carrier plate 220 and a lower mold base 230 which are sequentially distributed from top to bottom, at least two first mold core assemblies 300 and a second mold core assembly 400 which can be matched with the two first mold core assemblies 300 to form an injection molding cavity are arranged in the lower mold plate 210, wherein the injection molding cavity corresponds to an outlet of the glue injection runner on the connecting column.
As shown in fig. 5 and 6, the first mold core assembly 300 includes a mold core cylinder 310 disposed in the lower mold plate 210 and a fixing core 320 disposed in an inner cavity of the mold core cylinder 310, the mold core cylinder 310 can horizontally rotate in the lower mold plate 210, and after mold closing, the mold core cylinder 310 abuts against the connecting column. The core barrel 310 is provided with a fixing part connected with the second core assembly 400, the inner wall of the core barrel 310 is provided with a helical tooth forming groove 311 adjacent to the fixing part, and the fixing core 320 is provided with a plurality of material ejecting cavities 321 vertically penetrating through the fixing core 320. The second mold core assembly 400 includes a moving channel 410 disposed in the lower mold plate 210, a driving mechanism 420 located at one side of the moving channel 410 and connected to the lower mold plate 210, a moving guide 430 connected to an output end of the driving mechanism 420, a moving core 440 fixedly disposed on the moving guide 430 and respectively abutted to the two mold core barrels 310, and two return rods 450 respectively disposed at one side of the moving core 440 and respectively connected to the moving guide 430, wherein the moving core 440 is provided with a moving forming groove 441 matched with the helical tooth forming groove 311. The two are matched with each other to form an injection molding cavity, and the fixed cores 320 are distributed in the injection molding cavity.
An ejector pin capable of moving back and forth in the ejector cavity 321 is arranged in the lower die holder 230, before the ejector pin ejects the workpiece 500, the driving mechanism 420 drives the movable guide block 430 to be away from the die core cylinder 310, and in the process that the workpiece 500 is ejected by the ejector pin, the workpiece 500 drives the die core cylinder 310 to rotate horizontally, so that the workpiece 500 is ejected from the injection molding cavity. When the workpiece is demolded, the driving mechanism 420 drives the movable guide block 430 to approach the core cylinder 310 and push the core cylinder 310 to return by using the return rod 450. As shown in fig. 3 and 4, the fusing material enters the injection molding cavity through the glue injection port 111, after molding and before demolding of the workpiece, after the driving mechanism 420 drives the movable guide block 430 to move away from the mold core cylinder 310, the ejector pin of the injection molding machine enters the lower mold base 230 to jack up the workpiece 500 by using the ejector pin, and the workpiece 500 is vertically jacked up and demolded by the ejector pin. In the demolding process, as the workpiece 500 is provided with helical teeth after being molded, the helical teeth of the workpiece 500 can drive the mold core barrel 310 to rotate horizontally, the workpiece 500 can be separated from the mold core barrel 310 in the rotating process, the mold can be smoothly demolded without the control of various gears or racks, the mold structure is optimized, the occurrence of faults is reduced, and the improvement of the working efficiency is facilitated.
The lower template 210 is provided with two installation cavities distributed at intervals, the installation cavities are distributed on one side of the moving channel 410, and the fixing part is installed in the installation cavities. As shown in fig. 5, the fixing portion includes a first horizontal surface 312 adjacent to the inner cavity of the core barrel 310, a vertical surface 313 connected to the first horizontal surface 312, a second horizontal surface 314 connected to the vertical surface 313 and distributed on one side of the helical tooth forming groove 311, an inclined surface 315 connected to the second horizontal surface 314, a third horizontal surface 316 connected to the vertical surface 313 and distributed on the other side of the helical tooth forming groove 311, and an arc surface 317 connected to the third horizontal surface 316, the helical tooth forming groove 311 has a vertical surface 3110 adjacent to the arc surface 317, and top surfaces of the second horizontal surface 314 and the third horizontal surface 316 are on the same straight line. As shown in fig. 7, a first through groove is formed between the mounting cavity and the moving channel 410, the moving core 440 moves horizontally back and forth in the first through groove and is connected to the fixing portion, the moving molding grooves 441 are distributed at the end of the connecting end of the moving core 440, an abutting portion 442 abutting against the vertical surface 3110 is formed on one side of the moving molding groove 441, a pointed protrusion 443 is formed on the other side of the moving molding groove 441, and the pointed protrusion 443 is clamped in a clamping cavity formed by the second horizontal surface 314 and the inclined surface 315. An L-shaped connecting part 444 abutted against the vertical surface 313 and the first horizontal surface 312 is arranged below the movable molding groove 441, one end of the L-shaped connecting part 444 is abutted against the pointed convex part 443, and the other end is provided with an arc-shaped recess 445 for partially accommodating the die core cylinder 310.
With the above structure, when the fixing portion is connected to the movable core 440, the L-shaped connecting portion 444 abuts against the first horizontal surface 312 of the core barrel 310, the circular arc-shaped recess 445 accommodates the corresponding portion of the core barrel 310 therein, the pointed protrusion 443 is clamped in the clamping cavity formed by the second horizontal surface 314 and the inclined surface 315, the abutting portion 442 on the other side abuts against the vertical surface 3110, and an injection molding cavity matched with the shape of the workpiece 500 is formed after connection, which is specially designed for the shape of the workpiece. The movable forming groove 441 is internally provided with a convex structure, and the movable forming groove 441 is formed in a groove structure on the side wall of the helical gear after injection molding.
The moving channel 410 is internally provided with guide blocks 212 positioned at two sides of the moving channel 410, the corresponding position of the moving guide block 430 is provided with a guide groove 446 matched with the guide blocks 212, and the driving mechanism 420 is connected to the outer part of the lower template 210 through a bolt. The driving mechanism 420 preferably adopts an oil cylinder, so that the movable guide block 430 is driven to move smoothly back and forth, the demolding of the workpiece 500 is facilitated, and the movable guide block 430 is controlled to return smoothly and conveniently, so that the next injection molding is facilitated.
A second through groove for the return rod 450 to move back and forth is further formed in one side of the installation cavity, the return rod 450 horizontally moves back and forth in the second through groove, two guide bearings 211 arranged at intervals are mounted on one side of each second through groove, and the guide bearings 211 are used for being in contact with the return rod 450 for guiding. When the return rod 450 is driven by the movable guide block 430 to return to enter the second through groove, the return rod 450 extends into the second through groove, one side of the return rod 450 contacts with the guide bearing 211, and the circumferential wall of the guide bearing 211 is a smooth arc-shaped contact surface, and the guide bearing 211 can rotate, so that the guide direction of the return rod 450 can be smooth. The other side of the return rod 450 is convenient for the rotary mold core barrel 310 to contact and push the rotary mold core barrel 310 to return, the movable core 440 moves close to and is matched and connected with a fixed part on the mold core barrel 310 while returning, the mold core barrel 310 after returning is equivalently fixed under the combined action of the installation cavity, the return rod 450 and the movable core 440, and then the next processing and use can be continued.
The lower die holder 230 includes a bottom plate 231, side plates 232 disposed on two sides of the bottom plate 231, a thimble plate 233 disposed between the two side plates 232, and a thimble bearing plate 234 disposed above the thimble plate 233, the thimble is vertically connected to the thimble bearing plate 234, the thimble plate 233 and the thimble bearing plate 234 are screwed, and a plurality of self-reset springs 2340 are disposed between the thimble bearing plate 234 and the lower die plate 220. After the workpiece 500 is ejected and the mold is removed, the self-reset spring 2340 can drive the ejector pin to reset to wait for the next processing.
The first injection mold is designed according to the shape of the processed workpiece 500, as shown in fig. 8, and ensures higher precision of the finished product. Secondly, thereby come the cooperation through rotatory mold core section of thick bamboo 310 and mobilizable removal core 440 and put into the injection molding die cavity with fixed core 320, accomplish the back of moulding plastics, it keeps away from to drive removal core 440 through actuating mechanism 420, utilize the thimble to push out work piece 500 perpendicularly in liftout chamber 321 this moment, because of work piece 500 self is the skewed tooth structure, can drive rotatory model = core section of thick bamboo and work piece 500 break away from, go out the mould smoothly, such drawing of patterns mode, moreover, the steam generator is simple in structure, the simple operation, no longer need many and complicated gear or rack structure, help promoting work efficiency.
The above are merely embodiments of the present invention, and do not limit the scope of the present invention.
Claims (10)
1. A helical gear injection mold is characterized in that: the mold comprises an upper mold mechanism with a glue injection runner and a lower mold mechanism matched with the upper mold mechanism and arranged below the upper mold mechanism, wherein the lower mold mechanism comprises a lower template, a lower mold bearing plate and a lower mold base which are sequentially distributed from top to bottom, and at least two first mold core assemblies and a second mold core assembly which can be matched with the two first mold core assemblies to form an injection molding cavity are arranged in the lower template;
the first mold core component comprises a mold core barrel and a fixed core, the mold core barrel is arranged in the lower template in a sleeved mode, the fixed core is arranged in an inner cavity of the mold core barrel, the mold core barrel can horizontally rotate in the lower template, the mold core barrel is provided with a fixed part connected with the second mold core component, the inner wall of the mold core barrel is provided with a helical tooth forming groove adjacent to the fixed part, and the fixed core is provided with a plurality of material ejecting cavities vertically penetrating through the fixed core;
the second mold core component comprises a moving channel arranged in the lower template, a driving mechanism positioned on one side of the moving channel and connected with the lower template, a moving guide block connected with the output end of the driving mechanism, a moving core arranged on the moving guide block and respectively connected with two mold core barrels, and two return rods respectively arranged on one side of the moving core and respectively connected with the moving guide block, wherein the moving core is provided with a moving forming groove matched with the inclined tooth forming groove, the moving forming groove and the inclined tooth forming groove are matched with each other to form an injection molding cavity, and the fixed cores are distributed in the injection molding cavity;
the lower die base is internally provided with an ejector pin capable of moving back and forth in the ejector cavity, before the ejector pin ejects a workpiece, the driving mechanism drives the movable guide block to be away from the die core cylinder, and in the process that the workpiece is ejected by the ejector pin, the workpiece drives the die core cylinder to rotate horizontally, so that the workpiece is ejected from the injection molding cavity; and after the workpiece is demoulded, the driving mechanism drives the movable guide block to be close to the mold core barrel and pushes the mold core barrel to return by using the return rod.
2. The helical gear injection mold according to claim 1, wherein: the lower template is provided with two installation cavities distributed at intervals, the installation cavities are distributed on one side of the moving channel, a first through groove for the moving core to move and adjacent to the installation cavity is formed between the installation cavities and the moving channel, and a second through groove for the return rod to move back and forth is further formed in one side of the installation cavity.
3. The helical gear injection mold according to claim 2, wherein: the fixed part is installed in the installation cavity, the fixed part include with the first horizontal plane that mold core section of thick bamboo inner chamber borders on, with the perpendicular that first horizontal plane is connected, with the perpendicular connect distribute in the second horizontal plane of skewed tooth profiled groove one side, with the inclined plane that the second horizontal plane is connected, with the perpendicular connect distribute in the third horizontal plane of skewed tooth profiled groove opposite side and with the arc surface that the third horizontal plane is connected, the second horizontal plane with third horizontal plane top surface is in on the same straight line.
4. The helical gear injection mold according to claim 3, wherein: the helical tooth forming groove is provided with a vertical surface adjacent to the circular arc surface.
5. The helical gear injection mold according to claim 4, wherein: the movable core moves back and forth horizontally in the first through groove and is connected with the fixed part, the movable forming grooves are distributed at the end part of the connecting end of the movable core, one side of each movable forming groove is provided with an abutting part abutted against the vertical surface, the other side of each movable forming groove is provided with a sharp convex part, and the sharp convex part is clamped in a clamping cavity formed by the second horizontal plane and the inclined plane; an L-shaped connecting part which is abutted against the vertical surface and the first horizontal surface is arranged below the movable forming groove, one end of the L-shaped connecting part is abutted against the pointed convex part, and the other end of the L-shaped connecting part is provided with an arc-shaped recess for accommodating the die core barrel part.
6. The helical gear injection mold according to claim 2, wherein: the movable channel is internally provided with guide blocks positioned at two sides of the movable channel, and the corresponding positions of the movable guide blocks are provided with guide grooves matched with the guide blocks.
7. The helical gear injection mold according to claim 6, wherein: the driving mechanism is connected to the outer portion of the lower template through a bolt.
8. The helical gear injection mold according to claim 6, wherein: the return rod horizontally moves back and forth in the second through grooves, two guide bearings which are arranged at intervals are mounted on one side of each second through groove, and the guide bearings are used for being in contact with the return rod for guiding.
9. The helical gear injection mold according to claim 1, wherein: the lower die holder comprises a bottom plate, side plates arranged on two sides of the bottom plate, ejector plates arranged between the side plates and ejector pin bearing plates distributed above the ejector plates, wherein ejector pins are vertically connected onto the ejector pin bearing plates, and the ejector plates are in threaded connection with the ejector pin bearing plates.
10. The helical gear injection mold according to claim 9, wherein: and a plurality of self-reset springs are arranged between the thimble bearing plate and the lower die bearing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221730458.9U CN217752597U (en) | 2022-07-06 | 2022-07-06 | Helical gear injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221730458.9U CN217752597U (en) | 2022-07-06 | 2022-07-06 | Helical gear injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217752597U true CN217752597U (en) | 2022-11-08 |
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ID=83870962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221730458.9U Active CN217752597U (en) | 2022-07-06 | 2022-07-06 | Helical gear injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217752597U (en) |
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2022
- 2022-07-06 CN CN202221730458.9U patent/CN217752597U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 91 and 104 Rongsheng Road, Changzhou Street, Rongchang District, Chongqing, 404100 Patentee after: Chongqing Meitai Plastic Co.,Ltd. Address before: No. 91, Rongsheng Road, Changzhou Street, Rongchang District, Chongqing 404100 Patentee before: CHONGQING MEITAI PLASTIC CO.,LTD. |
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| CP03 | Change of name, title or address |