CN210966982U - Powder metallurgy injection molding mould - Google Patents
Powder metallurgy injection molding mould Download PDFInfo
- Publication number
- CN210966982U CN210966982U CN201921897109.4U CN201921897109U CN210966982U CN 210966982 U CN210966982 U CN 210966982U CN 201921897109 U CN201921897109 U CN 201921897109U CN 210966982 U CN210966982 U CN 210966982U
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- plate
- movable mould
- fixed
- movable
- die
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 15
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 7
- 238000000465 moulding Methods 0.000 claims description 11
- 238000013037 co-molding Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a powder metallurgy injection moulding mould, include: the fixed die assembly comprises a fixed die plate, and the fixed die plate is provided with an integrally formed fixed die core for stamping; and the movable mold assembly comprises a second movable mold core plate and a first movable mold core plate accommodated in the second movable mold plate, the first movable mold core plate and the second movable mold core plate are respectively provided with a tooth-shaped groove and a circular groove corresponding to the fixed mold core, and the movable mold core and an ejector pin sleeved on the outer side of the movable mold core extend into the grooves and are tightly matched with the fixed mold core to form a product cavity. The utility model discloses a through each other realize the smart location with the movable mould subassembly for concentric circles's cover half, guarantee the axiality of profile of tooth and hole, facility bikini advances gluey mouth in the cover half benevolence, controls the circularity out of round deflection of injection moulding process, and the thimble design both can be used for forming the product chamber simultaneously and also can be used as ejecting ejector sleeve ejecting with the product, has realized the multi-functional application of simple part, has simplified the design.
Description
Technical Field
The utility model relates to a sun gear and planetary gear's forming die belongs to the mould field.
Background
The mould is various moulds and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. In short, a mold is a tool for molding an article, which is composed of various parts, and different molds are composed of different parts, and it is accomplished by the processing of the outer shape of the article mainly by the change of the physical state of the molded material. The sun gear belongs to a basic component of an epicyclic gear train, and in the planetary gear train, an outer gear serving as a central gear is called as a sun gear; the planetary gears are gear systems which can rotate around the rotating shafts of the planetary gears like fixed-axis gears, and the rotating shafts of the planetary gears rotate around the axes of other gears along with a planet carrier, but molds for molding tooth-thickness inserts in the market are generally difficult to mold well and cannot be positioned accurately, so that the coaxiality of the tooth form and an inner hole of a product cannot be guaranteed, the out-of-roundness deformation amount is large in the injection molding process, the machined gears are easy to cause abrasion of parts, the working efficiency is reduced, and the potential safety hazard is increased.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model aims to provide a novel gear mould for industrial production.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a powder metallurgy injection molding die for co-molding a sun gear and a planetary gear, comprising:
the fixed die assembly comprises a fixed die base plate, a first connecting plate and a second connecting plate which are sequentially fixed below the fixed die base plate, wherein the second connecting plate is internally recessed to form a first groove part;
the movable mould assembly comprises a movable mould base, movable mould pads vertically arranged on two sides of the movable mould base correspondingly, and a movable mould base plate arranged on the movable mould pads, wherein the movable mould base, the movable mould pads and the movable mould base plate jointly enclose a containing space, the movable mould assembly further comprises a jacking device arranged in the containing space, the jacking device comprises a thimble, the movable mould base plate is inwards sunken from one side to form a second groove part, the movable mould assembly further comprises a movable mould core plate contained in the second groove part, the movable mould core plate comprises a first movable mould core plate and a second movable mould core plate, the second movable mould core plate is inwards sunken from one side to form a third groove part, the first movable mould core plate is contained in the third groove part, the first movable mould core plate and the second movable mould core plate are respectively provided with a tooth-shaped groove and a circular groove corresponding to the fixed mould core, the movable mould assembly further comprises a movable mould core, the thimble is sleeved on the outer side of the movable mould core, one, the runner is provided with a three-point type runner at one end close to the movable die core, and the three-point type runner is positioned in the fixed die core;
the guide assembly comprises a guide pillar fixed on the movable die base plate and a guide sleeve sleeved on the guide pillar and fixed on the first connecting plate and/or the second connecting plate.
Furthermore, a flow dividing valve for dividing the sprue runner is arranged in the second connecting plate, and the flow dividing valve is provided with at least two flow dividing supporting points which are respectively matched with the corresponding die cores.
Further, the flow dividing valve is connected with the first connecting plate through screws and is fixed on the fixed die base plate.
Furthermore, the jacking device further comprises a thimble base plate and a thimble base plate fixedly arranged on the thimble base plate, and the thimble is arranged on the thimble base plate.
Furthermore, the fixed die core, the movable die core, the thimble, the circular groove and the tooth-shaped groove are concentric circles.
Furthermore, the jacking device also comprises a resetting device which is arranged on the thimble base plate and penetrates through the thimble base plate.
Further, the reset device comprises a reset rod and a reset spring sleeved on the reset rod.
Furthermore, an ejector rod is fixed on the first connecting plate towards the movable die assembly.
Further, the forming die also comprises a fixed assembly fixedly connected with the fixed die assembly and the movable die assembly.
Further, the fixing assembly comprises a fixing strip and a fixing hole arranged on the fixing strip.
The beneficial effects of the utility model reside in that:
the utility model relates to a powder metallurgy injection moulding mould, the product is two types of metal (material: 17-4 stainless steel) gears: sun teeth 2 and planet teeth 6, and the two products are produced in a common mode; the die adopts a tooth-shaped position integral tooth thickness insert, and realizes precise positioning by adopting a fixed die assembly and a movable die assembly which are concentric circles with each other, so that the coaxiality of the tooth shape and an inner hole is ensured to be less than 0.005 mm; meanwhile, the mould adopts a shunt valve to control the injection type, and a three-point type glue inlet is arranged in the fixed mould core to control the roundness out-of-round deformation amount in the injection molding process, so that the injection molding efficiency is improved; moreover, the ejector pin design of the die can be used for forming a product cavity and ejecting a product out of an ejection push pipe after die opening, so that multifunctional application of simple parts is realized, and the design is simplified; the die testing and the subsequent sintering process verify that the tooth profile precision and the coaxiality of the finished product meet and exceed the requirements of a drawing, and the mass production is stable.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a whole view of the present invention.
Fig. 2 is a partial first perspective view of the mold.
Fig. 3 is a schematic diagram of the gate, the splitter valve, the second connecting plate and the fixed mold plate.
FIG. 4 is a schematic perspective view of a three-point gate
Fig. 5 is a perspective view of the combination of the cavity insert and the core insert.
Fig. 6 is a perspective view of the movable mold core plate.
Fig. 7 is a perspective view of the jacking device.
FIG. 8 is a schematic view of the ejector pin, the moving mold core, and the product.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
A powder metallurgy injection molding die is used for co-molding production of a sun gear and a planetary gear. As shown in fig. 1 to 8, the forming die comprises a fixed die component 1, a movable die component 2, a fixed component 3 and a guide component 4, wherein the fixed die component 1 is opposite to the movable die component 2 and is used for being matched with a tooth-shaped cavity, and the guide component 4 is used for guiding the relative positions of the movable die component 2 and the fixed die component 1, so that no deviation is ensured to ensure the quality of a product profile. When this forming die need put in storage, can fix cover half subassembly 1 and movable mould subassembly 2 through fixed subassembly 3 for both are closed each other, can avoid the inside original paper of mould to receive the damage when guaranteeing the assembly precision of mould.
Specifically, the fixed mold assembly 1 comprises a fixed mold base plate 11, a first connecting plate 12 and a second connecting plate 13 which are sequentially fixed below the fixed mold base plate 11, a first groove portion 131 is formed in one side of the second connecting plate 13 in a concave mode, and the fixed mold assembly 1 further comprises a fixed mold plate 14 which is contained in the first groove portion 131 and fixedly connected with the second connecting plate 13. A positioning ring 15 penetrating through the fixed mold base plate 11 is arranged on one side of the fixed mold base plate 11, a sprue channel 16 corresponding to the positioning ring 15 is arranged on the first connecting plate 12 and the second connecting plate 13, the positioning ring 15 corresponds to a gun platform on an injection molding machine in position and is used for guiding the gun platform to enable the injection molding machine to accurately inject materials into a mold, and the sprue channel 16 is used for guiding the injected materials to enter the mold.
The fixed mold plate 14 is integrally formed with 2 first fixed mold cores 141 for punch-forming the sun gear 271 and 6 second fixed mold cores 142 for punch-forming the planet gear 272 (in other embodiments, the number of the sun gear fixed mold cores and the planet gear fixed mold cores may be arbitrarily changed, and is not limited thereto). The first connecting plate 12 is provided with 4 ejector rods 18 which are uniformly distributed on four corners of the first connecting plate. The other side of the second connecting plate 13 is recessed inwards, a shunt valve 19 for shunting the sprue channel 16 is accommodated in the recessed position, the shunt valve 19 is fixed on the fixed die base plate 11 through 6 groups of long screws 191, the shunt valve 19 is provided with 8 shunting pivots, each shunting channel 192 corresponds to and is matched with all the fixed die cores in sequence, and branches of the shunting channels 192 flowing into the fixed die cores are uniformly shunted into three micro channels to penetrate through the fixed die cores.
The movable mold assembly 2 comprises a movable mold base 21, movable mold pads 22 vertically arranged on two sides of the movable mold base 21 correspondingly, and movable mold pads 23 arranged on the movable mold pads, the movable mold base 21, the movable mold pads 22 and the movable mold pads 23 jointly enclose a containing space, the movable mold assembly further comprises a jacking device 24 arranged in the containing space, the jacking device comprises a thimble 241, the movable mold pads 23 are inwards recessed from one side to form a second groove portion 231, the movable mold assembly 2 further comprises a movable mold core plate 25 contained in the second groove portion 231, the movable mold core plate 25 comprises a first movable mold core plate 251 and a second movable mold core plate 252, the second movable mold core plate 252 is inwards recessed from one side to form a third groove portion 2521, the first movable mold core plate 251 is contained in the third groove portion 2521, the first movable mold core plate 251 and the second movable mold core plate 252 are respectively provided with a tooth-shaped groove 2511 and a circular groove 2522 corresponding to the fixed mold cores 141 and 142, the movable mold assembly 2 further includes a first movable mold core 261 matched with the first fixed mold core 141 and a second movable mold core 262 matched with the second fixed mold core 142, the number of the thimble 241 is 8, the thimble 241 is respectively sleeved outside the movable mold cores 261 and 262, one end of the movable mold cores 261 and 262 and one end of the thimble 241 extend into the corresponding circular recess 2522, and are tightly matched with the fixed mold cores 141 and 142 to form mold cavities of the gear products 271 and 272, one end of the diversion channel 192 close to the movable mold cores 261 and 262 is provided with a three-point gate 194, and the three-point gate 194 is located in the fixed mold cores 141 and 142.
The lifting device 24 further includes a thimble base plate 243, a thimble seat plate 242 fixedly disposed on the thimble base plate 243, the thimble 241 is disposed on the thimble seat plate 243, and the lifting device 24 further includes a reset device 244 disposed on the thimble base plate 243 and passing through the thimble seat plate 242. The reset device 244 is composed of a reset rod 2441 and a reset spring 2442 sleeved on the reset rod 2441. Reset rods 2441 and reset springs 2442 are provided in 4 numbers, and are uniformly distributed on 4 corners of the ejector pin base plate 242, one end of the reset rod 2441 is limited between the ejector pin base plate 242 and the ejector pin base plate 243, and the other end can freely penetrate through the movable die base plate 23 and is aligned with the edge of the movable die base plate 23. The return spring 2442 has a portion extending into the movable die backing plate 23 to limit the position of itself relative to the movable die backing plate 23, and another portion protruding out of the movable die backing plate 23 and abutting against the ejector pin backing plate 242. After the ejector pin 18 of the mold is pushed out by the injection molding machine, the elastic force of the passable return spring 2442 makes the jacking device 24 return, and the product is ejected.
The utility model discloses in, the die cavity that can the complete product of shaping is cooperated to all fixed mould benevolence, movable mould benevolence board, movable mould benevolence and thimble, and they are each other concentric circles, have increased the shaping precision of product, guarantee that the axiality of profile of tooth and hole <0.005 mm.
The shell of the forming die is also provided with a fixed component 3 fixedly connected with the fixed die component 1 and the movable die component 2. The fixing assembly 3 comprises a fixing strip 31, fixing holes 32 are formed in the fixing strip 31, and screws 33 fix the fixing strip 31 on the fixed die assembly 1 and the movable die assembly 2 simultaneously through the fixing holes 32, so that the relative positions of the fixed die assembly 1 and the movable die assembly 2 are guaranteed to be unchanged.
The guiding assembly 4 includes a guiding post 41 and a guiding sleeve 42 sleeved on the guiding post 41. The number of the guide pillars 41 is 4, the guide pillars are uniformly distributed on 4 corners of the fixed die assembly 1 and the movable die assembly 2, one end of each guide pillar 41 is just limited by the corresponding movable die pad 22, namely, one movable die pad 22 is limited by 2 guide pillars, and one end of each guide pillar can freely extend into the fixed die base plate 11. The guide sleeve 42 is correspondingly matched with the guide post 41 and is uniformly distributed on 4 corners of the first connecting plate and the second connecting plate. When the mold is opened, the guide post 41 is separated from the guide sleeve 42, namely, the movable mold component 1 is far away from the fixed mold component 2, when the mold is closed, the guide post 41 penetrates into the guide sleeve 42, and the movable mold component 1 and the fixed mold component 2 form a cavity for forming a gear.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A powder metallurgy injection molding die for co-molding a sun gear and a planetary gear, comprising:
the fixed die assembly comprises a fixed die base plate, a first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are sequentially fixed below the fixed die base plate, the second connecting plate is internally recessed to form a first groove part, the fixed die assembly also comprises a fixed die plate which is accommodated in the first groove part and is fixedly connected with the second connecting plate, one side of the fixed die base plate is provided with a positioning ring which penetrates through the fixed die base plate, the first connecting plate and the second connecting plate are provided with sprue runners corresponding to the positioning ring, the fixed die plate is integrally provided with at least two fixed die cores for punch forming, and the sprue runners are uniformly dispersed into three runners which penetrate through the fixed die cores;
the movable mould component comprises a movable mould base, movable mould pad feet vertically arranged on two sides of the movable mould base correspondingly, and a movable mould base plate arranged on the movable mould pad feet, wherein the movable mould base, the movable mould pad feet and the movable mould base plate are jointly enclosed to form an accommodating space, the movable mould component further comprises a jacking device arranged in the accommodating space, the jacking device comprises a thimble, the movable mould base plate is inwards recessed from one side to form a second groove part, the movable mould component further comprises a movable mould core plate accommodated in the second groove part, the movable mould core plate comprises a first movable mould core plate and a second movable mould core plate, the second movable mould core plate is inwards recessed from one side to form a third groove part, the first movable mould core plate is accommodated in the third groove part, and the first movable mould core plate and the second movable mould core plate are respectively provided with a tooth-shaped groove and a circular groove corresponding to the mould core, the movable mould component also comprises a movable mould core, the thimble is sleeved on the outer side of the movable mould core, one end of the movable mould core and one end of the thimble extend into the circular groove and are closely matched with the fixed mould core to form a cavity of a gear product, one end of the sprue runner, which is close to the movable mould core, is provided with a three-point type sprue, and the three-point type sprue is positioned in the fixed mould core;
the guide assembly comprises a guide pillar fixed on the movable die base plate and a guide sleeve sleeved on the guide pillar and fixed on the first connecting plate and/or the second connecting plate.
2. The molding die of claim 1, wherein said lifting device further comprises a thimble base plate, and a thimble pad plate fixedly disposed on said thimble base plate, said thimble being disposed on said thimble pad plate.
3. The molding mold according to claim 1, wherein a flow dividing valve for dividing the sprue channel is disposed in the second connecting plate, and the flow dividing valve has at least two flow dividing fulcrums respectively adapted to the cavity blocks.
4. The molding die as claimed in claim 3, wherein said flow divider is connected to said first connecting plate by screws and fixed to said stationary die holder plate.
5. The molding die of claim 1, wherein the core insert, the pin, and the circular groove and the tooth-shaped groove are concentric circles.
6. The molding die of claim 2, wherein said lifting means further comprises a return means disposed on said ejector retainer plate and passing through said ejector retainer plate.
7. The molding die of claim 6, wherein the return device comprises a return rod and a return spring sleeved on the return rod.
8. The molding die of claim 1, wherein an ejector pin is fixed from said first connecting plate toward said movable die assembly.
9. The molding die of claim 1, further comprising a stationary assembly fixedly connecting the stationary die assembly and the movable die assembly.
10. The molding die of claim 9, wherein said securing assembly includes a securing strip and a securing hole disposed on said securing strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897109.4U CN210966982U (en) | 2019-11-06 | 2019-11-06 | Powder metallurgy injection molding mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897109.4U CN210966982U (en) | 2019-11-06 | 2019-11-06 | Powder metallurgy injection molding mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210966982U true CN210966982U (en) | 2020-07-10 |
Family
ID=71440847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921897109.4U Expired - Fee Related CN210966982U (en) | 2019-11-06 | 2019-11-06 | Powder metallurgy injection molding mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210966982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021774A (en) * | 2021-03-05 | 2021-06-25 | 苏州宥安骏精密科技有限公司 | Mould structure suitable for micro-injection molding machine |
-
2019
- 2019-11-06 CN CN201921897109.4U patent/CN210966982U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021774A (en) * | 2021-03-05 | 2021-06-25 | 苏州宥安骏精密科技有限公司 | Mould structure suitable for micro-injection molding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200710 |