CN117359883B - Gear shaft injection mold - Google Patents
Gear shaft injection mold Download PDFInfo
- Publication number
- CN117359883B CN117359883B CN202311647911.9A CN202311647911A CN117359883B CN 117359883 B CN117359883 B CN 117359883B CN 202311647911 A CN202311647911 A CN 202311647911A CN 117359883 B CN117359883 B CN 117359883B
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- mold
- insert
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- 238000002347 injection Methods 0.000 title claims abstract description 16
- 239000007924 injection Substances 0.000 title claims abstract description 16
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000010862 gear shaping Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 abstract description 17
- 229920003023 plastic Polymers 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000001746 injection moulding Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000005242 forging Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/75—Shafts
Abstract
The invention provides a gear shaft injection mold, which comprises an upper mold and a lower mold, wherein an upper cavity and a lower cavity are respectively arranged on the upper mold and the lower mold, inserts are respectively arranged in the upper cavity and the lower cavity, the upper cavity, the lower cavity and the inserts form a gear forming cavity, a connecting shaft is arranged in the gear forming cavity, the bottom end of the connecting shaft extends to the lower part of the lower cavity, a storage hole is formed in one side of the connecting shaft, which is arranged in the gear forming cavity, and an ejection mechanism is arranged in the lower part of the lower cavity; this application makes the gear integrated into one piece of connecting axle of metal and plastics be the gear shaft through moulding plastics, replaces traditional metal gear shaft, and the cost is reduced, and weight when reducing gear shaft assembly, and the position of connecting axle and gear junction is provided with the storage hole, guarantees that plastics are better hugs tightly the connecting axle, makes plastic gear be difficult for with the connecting rod separation.
Description
Technical Field
The application relates to the technical field of injection molds, in particular to a gear shaft injection mold.
Background
The gear shaft refers to a mechanical part that supports and rotates together with a rotating part to transmit motion, torque or bending moment; the conventional gear shaft is made of metal products, the processing period is long, the unit price is high, the mass production is generally the conventional machining process, the working procedures of blanking, lathe, milling machine, wire cutting and the like are needed, the working procedures are all needed to be aligned by a pull meter before processing, the accumulated tolerance of the product is large, the consistency is not well controlled, the coaxiality is not well controlled, the gear is a metal product, and the overall quality of the assembled product is large.
In order to improve work efficiency, be convenient for gear shaft follow-up installation and transmission, some among the prior art are with gear and shaft body integrated processing, and the mode of using frequently adopts the mould forging, but current gear shaft die forging mode is forging into bar structure mostly, then carries out the gear hobbing processing again, and because gear hobbing inefficiency, the shaping time is longer on the bar, greatly reduced machining efficiency, and still can influence the center of profile of tooth portion and shaft, be unfavorable for processing, and current mould is also unfavorable for the drawing of patterns moreover, influence the use, wait to improve.
The technical scheme is that the gear shaft precision machining method comprises a lower die, a round hole cavity is formed in one end surface of the lower die, a tooth-shaped cavity is formed in the bottom of the round hole cavity, a shaft cavity is formed in the center of the bottom of the tooth-shaped cavity, an arc cavity is formed in the connecting position of the shaft cavity and the tooth-shaped cavity, an upper die is connected to the side face of the other end of the round hole cavity in a sliding mode, a conical groove is formed in one end surface of the upper die, a cylindrical head is fixedly connected to the center of the conical groove, the upper die is connected through the lower die, hot forging and pressing can be directly conducted on bars, further precision of tooth-shaped parts and axles is guaranteed, follow-up finish machining tooth shapes are facilitated, efficiency is effectively improved, meanwhile, the conical head is forged and formed in a combined mode, demolding and follow-up clamping positioning are facilitated, convenience and stability of use are greatly improved, and machining efficiency and precision are guaranteed; the technical scheme can directly carry out hot forging forming on the bar stock and is mainly applied to processing of the traditional metal gear shaft.
The Chinese patent application number is CN201520636863.8, a gear shaft die with a publication number of CN204892945U, a technical scheme is disclosed, the gear shaft die comprises an upper die, a middle die and a lower die which are sequentially arranged from top to bottom, a transverse cavity and a vertical cavity arranged at the bottom of the transverse cavity are arranged in the middle die, a gear die is arranged in the transverse cavity, the upper die comprises an upper inner punch and an upper punch, the upper inner punch is arranged in the upper punch, an upper inner punch cover is arranged at the top of the upper inner punch, the lower die comprises a lower punch and a lower punch, the lower punch is arranged in the middle die, a core rod is arranged in the lower punch, one end of the core rod stretches into the lower punch and is flush with the middle die, the other end of the core rod stretches out of the bottom of the lower punch, the lower punch contacts with the bottom of the transverse cavity in the middle die, and the lower punch contacts with the bottom of the vertical cavity in the middle die; the die has the advantages of high production efficiency, time saving and manpower and material resource saving, the surface of the gear shaft is free of burrs, the subsequent processing procedures are reduced, the processing precision is improved, and the application range is wide; the technical scheme is used for stamping iron powder, and the die is used for producing the gear shaft, so that compared with the prior production process, the time is greatly saved, the production efficiency is improved, manpower and material resources are saved, meanwhile, the precision of the gear shaft is improved, the product quality is ensured, and the die is mainly applied to the processing of the traditional metal gear shaft.
The prior art can overcome the defects of poor coaxiality control, easiness in processing, burrs and the like in the prior art, but the technical defects of high unit price, low processing efficiency and large overall quality of the assembled workpiece still exist, and the joint between the gear and the shaft of the common injection mold is easy to break and has lower strength.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
The invention provides a gear shaft injection mold, which comprises an upper mold and a lower mold, wherein an upper cavity and a lower cavity are respectively arranged on the upper mold and the lower mold, inserts are respectively arranged in the upper cavity and the lower cavity, the upper cavity, the lower cavity and the inserts form a gear forming cavity, a connecting shaft is arranged in the gear forming cavity, the bottom end of the connecting shaft extends to the lower part of the lower cavity, a storage hole is formed in one side of the connecting shaft, which is arranged in the gear forming cavity, and an ejection mechanism is arranged in the lower part of the lower cavity.
As a preferable scheme, the lower cavity comprises a gear lower molding part, a through hole is formed in the middle of the gear lower molding part, the upper part of the through hole is a step hole, the diameter of the step hole is larger than that of the through hole, lower inserts are arranged in the through hole and the step hole, and the diameter of the lower insert is equal to that of the through hole; one side of the gear lower forming part is provided with a gear lower extending part forming part.
As a preferable scheme, the lower extension portion forming part comprises a mounting through groove, a forming cavity matched with the height and the width of the gear lower extension portion is arranged in the mounting through groove, a forming block is arranged in the mounting through groove, and the gear lower extension portion is formed between the forming block and the forming cavity.
As a preferable scheme, an ejector rod is arranged in the forming block.
As a preferable scheme, the gear middle forming insert is arranged in the lower cavity.
As a preferable scheme, the middle forming insert of the gear is connected with the lower cavity through a convex pin, and a positioning hole matched with the pin is formed in the upper cavity.
As a preferable scheme, the upper die cavity comprises a gear middle upper die cavity and a gear upper die part, an upper through hole is formed in the middle of the gear upper die part, and an upper insert is arranged in the upper through hole.
As a preferable scheme, the middle part of lower mold insert is provided with the connecting axle hole, and the connecting axle sets up in the connecting axle hole, and the one end of connecting axle extends to the upper portion of lower mold insert, is provided with on the connecting axle on lower mold insert upper portion the storage hole, and the other end of connecting axle extends to in the ejecting hole of mount pad, the lower part of ejecting hole is provided with the ejector rod.
As a preferable scheme, the upper die comprises an upper die bottom plate, an upper die plate is arranged at the lower part of the upper die bottom plate, an upper mounting cavity is formed in the upper die plate, an upper cavity is formed in the upper mounting cavity, and an upper forming cavity in the middle of the gear and an upper forming part of the gear are formed in the upper cavity.
As a preferable scheme, an upper die mounting plate is arranged between the upper die bottom plate and the upper die plate.
As a preferable scheme, the lower die comprises a lower die plate, a lower mounting cavity is formed in the lower die plate, a lower cavity is arranged in the lower mounting cavity, a gear lower forming part and a gear lower extending part forming part are formed in the lower cavity, and an ejection mechanism is arranged at the lower parts of the gear lower forming part and the gear lower extending part forming part.
As a preferable scheme, the ejection mechanism comprises an ejection rod, the ejection rod is connected with the ejection plate, an ejection bottom plate is arranged at the lower part of the ejection plate, a lower template bottom plate is arranged at the lower part of the ejection bottom plate, and a cushion block is further arranged between the lower template bottom plate and the lower template.
As a preferable scheme, the injection molding material in the gear forming cavity adopts PA66, 30% long glass fiber and 10% glass bead mixed material.
This application replaces traditional metal gear axle through injection moulding's gear axle, and the cost is reduced, and weight when reducing gear axle assembly, and this application specific advantage is as follows:
1. the gear and the connecting shaft are integrally formed, so that higher coaxiality is ensured;
2. the storage hole is formed in the position where the connecting shaft is connected with the gear, so that plastic is better in holding the connecting shaft, and the plastic gear is not easy to separate from the connecting rod;
3. the middle forming insert of the gear is connected with the lower cavity through a protruding pin, a positioning hole matched with the pin is formed in the upper cavity, the pin is arranged to position the middle forming insert of the gear and the lower cavity, and the pin is matched with the positioning hole, so that the precision of injection molding parts and the coaxiality of integrated forming assembly with a connecting shaft can be ensured;
4. the cost of the formed workpiece is lower, the production efficiency is higher, the processing period is shorter, and the detection consistency of the workpiece is better.
Drawings
FIG. 1 is a schematic view of a structure of a workpiece at an angle I;
FIG. 2 is a schematic view of the structure of a workpiece at a second angle;
FIG. 3 is a schematic overall structure of the present application;
FIG. 4 is a schematic view of the structure of the upper mold angle I of the present application;
FIG. 5 is a schematic view of the structure of the upper mold angle II of the present application;
FIG. 6 is a schematic view of the upper cavity of the present application;
FIG. 7 is a schematic view of the structure of the lower mold angle I of the present application;
FIG. 8 is a schematic view of the structure of the lower mold angle II of the present application;
FIG. 9 is a schematic view of the structure of the lower die angle III of the present application;
FIG. 10 is a schematic view of the structure of the lower die angle IV of the present application;
FIG. 11 is a schematic view of the structure of the lower cavity of the present application;
FIG. 12 is a schematic view of the lower insert of the present application;
FIG. 13 is a schematic view of the structure of a gear center forming insert of the present application;
FIG. 14 is a schematic view of the structure of the molding block of the present application;
FIG. 15 is a schematic view of the upper insert of the present application;
FIG. 16 is a schematic view of the casting system of the present application at an angle I;
FIG. 17 is a schematic view of a second angle of the casting system of the present application;
FIG. 18 is a schematic view of the structure of the connecting shaft of the present application;
FIG. 19 is a schematic view of the ejector mechanism of the present application;
wherein:
1. a gear shaft; 2. an upper die; 3. a lower die; 4. an upper cavity; 5. a lower cavity; 6. a pin; 7. positioning holes; 8. a connecting shaft; 9. a storage hole; 10. a gear; 11. a gear lower molding part; 12. a through hole; 13. a step hole; 14. a lower insert; 5. an ejector rod; 16. a gear lower extension molding part; 17. a gear lower extension; 18. installing a through groove; 19. a molding cavity; 20. molding blocks; 22. forming an insert in the middle of the gear; 23. a connecting shaft hole; 24. a mounting base; 25. forming a cavity in the middle of the gear; 26. a gear upper forming part; 27. an upper through hole; 28. an upper insert; 29. an upper die bottom plate; 30. an upper template; 31. an upper die mounting plate; 32. an upper mounting cavity; 33. a casting device; 34. a main flow passage; 35. a sub-runner; 36. a positioning ring; 37. a guide post; 38. a lower template; 39. a lower mounting cavity; 40. an ejector plate; 41. ejecting the bottom plate; 42. a lower template bottom plate; 43. a cushion block; 44. a cooling pipe; 45. and (5) guiding the sleeve.
Detailed Description
The following describes embodiments of the present invention in detail with reference to fig. 1 to 19. It should be noted that the detailed description herein is presented for purposes of illustration and explanation only and is not intended to limit the invention.
Embodiment one:
the embodiment adopts a mold with two cavities for manufacturing the gear shaft 1 shown in fig. 1 and 2, as shown in fig. 3, the embodiment provides a gear shaft injection mold, which comprises an upper mold 2 and a lower mold 3, as shown in fig. 4-11, wherein the upper mold 2 and the lower mold 3 are respectively provided with an upper cavity 4 and a lower cavity 5, inserts are arranged in the upper cavity 4 and the lower cavity 5, the upper cavity 4, the lower cavity 5 and the inserts form a gear forming cavity, preferably, the upper cavity 4, the lower cavity 5 and the inserts are processed by slow wires, more preferably, the lower cavity 5 and the inserts are connected through protruding pins 6, the upper mold 2 is provided with positioning holes 7 matched with the protruding pins 6, the pins 6 realize the positioning of the lower cavity 5 and the inserts, the precision of parts is ensured, the pins 6 are matched with the positioning holes 7, the positioning of the upper cavity 4, the lower cavity 5 and the inserts is realized, and the coaxiality of assembly is ensured; a connecting shaft 8 is arranged in the gear forming cavity, the connecting shaft 8 extends to the lower part of the lower cavity 5, a storage hole 9 is arranged on one side of the connecting shaft 8 arranged in the gear forming cavity, namely, a storage hole 9 is arranged at the connecting position of the connecting shaft 8 and a plastic material (a plastic gear); the connecting shaft 8 can be processed by adopting a cylindrical grinder, the tolerance can be 0.001mm, the reference precision of the workpiece during injection molding is ensured, and an ejection mechanism is arranged at the lower part of the lower cavity 5; the gear shaping cavity is used for shaping gear 10, and gear 10 is connected with connecting axle 8, realizes the integrated into one piece of gear shaft, and the setting of storage hole 9 makes the plastics of gear 10 and connecting axle 8 junction can be better hug tightly the connecting axle, guarantees that the gear 10 of plastics is difficult for with connecting axle 8 separation, and the two can not produce natural separation, must have under the intervention of powerful external force, and both just can separate, has improved integrated into one piece's intensity to improve gear shaft 1's life.
The injection molding material in the injection mold adopts PA66+30% long glass fiber+10% glass beads, so that the hardness and the service performance of the workpiece material are ensured; the injection molding process adopted for workpiece molding can realize stable production by using a 90-ton injection molding machine, and has low material removal cost and extremely low equipment use cost.
The connecting shaft 8 in the embodiment can adopt a metal shaft, the gear 10 adopts a plastic gear, the gear shaft 1 matched with metal and plastic in the embodiment replaces the traditional metal gear shaft, the cost is reduced, the whole quality of the assembled workpiece is smaller, the production efficiency is higher, the processing period is shorter, and the workpiece detection consistency is better.
Embodiment two:
the present embodiment specifically describes the lower cavity 5 and the upper cavity 4, specifically:
the lower cavity 5 comprises a gear lower molding part 11, a through hole 12 is formed in the middle of the gear lower molding part 11, a step hole 13 is formed in the upper part of the through hole 12, the diameter of the step hole 13 is larger than that of the through hole 12, a lower insert 14 is arranged in the through hole 12 and the step hole 13, the diameter of the lower insert 14 is equal to that of the through hole 12, and an ejector rod 15 is arranged at the lower parts of the lower insert 14 and the through hole 12 and used for ejecting a molded workpiece; one side of the gear lower forming part 11 is provided with a gear lower extending part forming part 16 for forming a gear lower extending part 17, in order to facilitate the processing of a die, the lower extending part forming part 16 comprises a mounting through groove 18, a forming cavity 19 matched with the height and the width of the gear lower extending part 17 is arranged in the mounting through groove 18, a forming block 20 is arranged in the mounting through groove 18, the gear lower extending part 17 is formed between the forming block 20 and the forming cavity 19, and an ejector rod 15 is arranged in the forming block 20 and used for ejecting a formed workpiece; the gear middle forming insert 22 is arranged in the lower cavity 5, the gear middle forming insert 22 is connected with the lower cavity 5 through the pin 6, and the positioning hole 7 matched with the pin 6 is arranged in the upper cavity 4.
The middle part of lower mold insert 14 is provided with connecting shaft hole 23, and connecting axle 8 sets up in connecting shaft hole 23, and connecting shaft 23's one end extends to the upper portion of lower mold insert 14, is provided with on the connecting shaft 23 of lower mold insert 14 upper portion storage hole 9, and connecting shaft 8's the other end extends to in the liftout hole of mount pad 24, the lower part of liftout hole is provided with ejector rod 15.
The upper die cavity 4 comprises a gear middle upper die cavity 25 and a gear upper die forming part 26, an upper through hole 27 is formed in the middle of the gear upper die forming part 26, and an upper insert 28 is arranged in the upper through hole 27.
The upper cavity 4, the lower cavity 5 and the inserts are matched to integrally form the gear shaft 1.
Embodiment III:
the present embodiment describes the upper die 2 and the lower die 3, specifically:
the upper die 2 comprises an upper die bottom plate 29, an upper die plate 30 is arranged at the lower part of the upper die bottom plate 29, more preferably, an upper die mounting plate 31 is arranged between the upper die bottom plate 29 and the upper die plate 30, the upper die bottom plate 29, the upper die mounting plate 31 and the upper die plate 30 are mutually connected by means of screws and the like, an upper mounting cavity 32 is formed in the upper die plate 30, an upper cavity 4 shown in fig. 6 is mounted in the upper mounting cavity 32, the upper cavity 4 is connected with the upper mounting cavity 32 by means of screws and the like, and a gear middle upper forming cavity 25 and a gear upper forming part 26 are formed in the upper cavity 4.
The upper die bottom plate 29, the upper die mounting plate 31 and the upper die plate 30 are provided with a pouring device 33, the pouring device 33 is communicated with the gear middle upper forming cavity 25 in the upper die cavity 4, the pouring system 33 comprises a main runner 34 arranged on the upper die bottom plate 29 and the upper die mounting plate 31, the main runner 34 is communicated with a split runner 35, the split runner 35 is communicated with the gear middle upper forming cavity 25, and the split runner 35 is arranged on the upper die plate 30 and the upper die cavity 4; preferably, the main runner 34 is provided with a main runner bushing, and the upper die bottom plate 29 is provided with a positioning ring 36; a cooling pipeline is arranged in the upper die plate 30 and the upper die cavity 4; the upper die plate 30 is also provided with a guide post 37.
The lower die 3 comprises a lower die plate 38, a lower mounting cavity 39 is formed in the lower die plate 38, a lower die cavity 5 shown in fig. 11 is mounted in the lower mounting cavity 39, the lower die cavity 5 is connected with the lower mounting cavity 39 through screws and the like, a gear lower forming part 11 and a gear lower extending part forming part 16 are formed in the lower die cavity 5, an ejection mechanism is arranged at the lower parts of the gear lower forming part 11 and the gear lower extending part forming part 16 and comprises an ejection rod 15, the ejection rod 15 is connected with an ejection plate 40, an ejection bottom plate 41 is arranged at the lower part of the ejection plate 40, a lower die plate bottom plate 42 is arranged at the lower part of the ejection bottom plate 41, a cushion block 43 is further arranged between the lower die plate 42 and the lower die plate 38, the cushion block 43 is respectively connected with the lower die plate 42 and the lower die plate 38 through screws and the like, and cooling pipelines 44 are arranged in the lower die plate 38 and the lower die cavity 5; the lower die plate 38 is also provided with a guide sleeve 45, and the guide post 37 is matched with the guide sleeve 45, so that the positioning and opening and closing actions of the die are conveniently realized.
The material enters into the gear molding cavity through the main runner 34 and the split runner 35, the integrated molding of the gear 10 and the connecting shaft 8 is realized, and the storage hole 9 arranged on the connecting shaft 8 enables the connection between the injection molded plastic gear 10 and the connecting shaft 8 to be tighter, so that the plastic and the connecting shaft 8 are not easy to separate, the connection strength between the plastic and the connecting shaft is improved, after casting is completed, the mold is opened, and the workpiece is ejected by the ejection mechanism for next period production.
The traditional metal gear is replaced under the same use environment, the overall quality of assembled workpieces is reduced, continuous production can be realized through the die, the period of 2 workpieces produced per unit time is 1 minute and 25 seconds, the unit price of the workpieces is reduced due to the great shortening of working hours and the change of the process, and the unit price of gear shaft workpieces produced by the die has advantages.
This application replaces traditional metal gear axle through injection moulding's gear axle, and the cost is reduced, and weight when reducing gear axle assembly, and this application specific advantage is as follows:
1. the plastic gear and the metal connecting shaft are integrally injection molded, so that the gear shaft has higher coaxiality, and the weight of the whole workpiece is reduced;
2. the storage hole is formed in the position where the connecting shaft is connected with the gear, so that plastic is better in holding the connecting shaft, and the plastic gear is not easy to separate from the connecting rod;
3. the middle forming insert of the gear is connected with the lower cavity through a protruding pin, a positioning hole matched with the pin is formed in the upper cavity, the pin is arranged to position the middle forming insert of the gear and the lower cavity, and the pin is matched with the positioning hole, so that the precision of injection molding parts and the coaxiality of integrated forming assembly with a connecting shaft can be ensured;
4. the arrangement of each insert is convenient for the integral processing of the die, reduces the cost of the die and improves the working efficiency;
5. the cost of the formed workpiece is lower, the production efficiency is higher, the processing period is shorter, and the detection consistency of the workpiece is better.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the foregoing embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations of the present invention are not described in detail.
Moreover, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which is also to be considered as disclosed herein.
Claims (5)
1. The utility model provides a gear shaft injection mold, includes last mould (2) and bed die (3), be equipped with last die cavity (4) and bed die (5) on last mould (2) and bed die (3) respectively, its characterized in that, install the mold insert in last die cavity (4), the bed die cavity (5), mold insert constitute the gear shaping die cavity, be provided with connecting axle (8) in the gear shaping die cavity, the bottom of connecting axle (8) extends to the lower part of bed die cavity (5), be provided with storage hole (9) on one side of connecting axle (8) setting inside the gear shaping die cavity, the lower part of bed die cavity (5) is equipped with ejection mechanism; a gear middle forming insert (22) is arranged in the lower cavity (5), the gear middle forming insert (22) is connected with the lower cavity (5) through a protruding pin (6), and a positioning hole (7) matched with the pin (6) is formed in the upper cavity (4); the lower die cavity (5) comprises a gear lower molding part (11), a through hole (12) is formed in the middle of the gear lower molding part (11), a step hole (13) is formed in the upper part of the through hole (12), the diameter of the step hole (13) is larger than that of the through hole (12), a lower insert (14) is arranged in the through hole (12) and the step hole (13), and the diameter of the lower insert (14) is equal to that of the through hole (12); a gear lower extension part forming part (16) is arranged on one side of the gear lower forming part (11); the upper die cavity (4) comprises a gear middle upper die cavity (25) and a gear upper die part (26), an upper through hole (27) is formed in the middle of the gear upper die part (26), and an upper insert (28) is arranged in the upper through hole (27).
2. Gear shaft injection mould according to claim 1, characterized in that the gear lower extension forming part (16) comprises a mounting through groove (18), a forming cavity (19) matched with the height and the width of the gear lower extension part (17) is arranged in the mounting through groove (18), a forming block (20) is arranged in the mounting through groove (18), and the gear lower extension part (17) is formed between the forming block (20) and the forming cavity (19).
3. The gear shaft injection mold according to claim 1, wherein a connecting shaft hole (23) is formed in the middle of the lower insert (14), the connecting shaft (8) is arranged in the connecting shaft hole (23), one end of the connecting shaft (8) extends to the upper portion of the lower insert (14), the storage hole (9) is formed in the connecting shaft (8) at the upper portion of the lower insert (14), the other end of the connecting shaft (8) extends to an ejection hole of the mounting seat (24), and an ejection rod (15) is arranged at the lower portion of the ejection hole.
4. The gear shaft injection mold according to claim 1, wherein the upper mold (2) comprises an upper mold bottom plate (29), an upper mold plate (30) is arranged at the lower part of the upper mold bottom plate (29), an upper mold mounting plate (31) is arranged between the upper mold bottom plate (29) and the upper mold plate (30), an upper mounting cavity (32) is formed in the upper mold plate (30), and an upper cavity (4) is formed in the upper mounting cavity (32).
5. The gear shaft injection mold according to claim 1, wherein the lower mold (3) comprises a lower mold plate (38), a lower mounting cavity (39) is formed in the lower mold plate (38), a lower cavity (5) is formed in the lower mounting cavity (39), the gear lower molding part (11) and the gear lower extension molding part (16) are formed in the lower cavity (5), and an ejection mechanism is arranged at the lower parts of the gear lower molding part (11) and the gear lower extension molding part (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647911.9A CN117359883B (en) | 2023-12-05 | 2023-12-05 | Gear shaft injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647911.9A CN117359883B (en) | 2023-12-05 | 2023-12-05 | Gear shaft injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117359883A CN117359883A (en) | 2024-01-09 |
| CN117359883B true CN117359883B (en) | 2024-03-12 |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960158A (en) * | 2015-06-11 | 2015-10-07 | 贵州振华群英电器有限公司（国营第八九一厂） | Half mold structure capable of easily ensuring coaxiality of plastic part |
| CN208305603U (en) * | 2018-04-24 | 2019-01-01 | 德仕科技（深圳）有限公司 | High-precision full-automatic is molded grabbing device |
| CN109695697A (en) * | 2019-01-25 | 2019-04-30 | 上海创率复合材料有限公司 | Gear and gear manufacture method |
| CN209395190U (en) * | 2018-12-29 | 2019-09-17 | 无锡高晟成型科技有限公司 | A kind of molding mold insert location structure |
| CN209566451U (en) * | 2019-01-29 | 2019-11-01 | 天津原谷科技有限公司 | A kind of insert injection moulding screw gear injection mold with positioning device |
| CN111331789A (en) * | 2020-03-13 | 2020-06-26 | 上海希荷精密模具有限公司 | Injection mold of gear piece |
| CN111577863A (en) * | 2020-05-21 | 2020-08-25 | 上海芮朔精密模塑科技有限公司 | Rubber-coated injection-molded gear, injection molding process and mold |
| CN111958904A (en) * | 2020-10-23 | 2020-11-20 | 宁海县大鹏模具塑料有限公司 | Water holding barrel forming die |
| CN112128137A (en) * | 2020-10-15 | 2020-12-25 | 深圳市若腾科技有限公司 | Fan blade assembly and manufacturing method thereof |
| CN113500741A (en) * | 2021-07-09 | 2021-10-15 | 珠海凯邦电机制造有限公司 | Injection mould |
| CN216578910U (en) * | 2021-12-16 | 2022-05-24 | 东莞市银海塑胶电子有限公司 | Radiator fan metal middle tube coaxiality guaranteeing structure |
| CN217098675U (en) * | 2022-04-01 | 2022-08-02 | 天津理工大学中环信息学院 | Integrated into one piece little duplicate gear injection mold |
| CN217373227U (en) * | 2021-12-30 | 2022-09-06 | 无锡模达科技有限公司 | Pump mold for preventing graphite damage |
| CN115503189A (en) * | 2022-10-12 | 2022-12-23 | 江苏业森汽车零部件有限公司 | Method for producing automobile gear pump gear by central injection of mandrel and used die |
-
2023
- 2023-12-05 CN CN202311647911.9A patent/CN117359883B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960158A (en) * | 2015-06-11 | 2015-10-07 | 贵州振华群英电器有限公司（国营第八九一厂） | Half mold structure capable of easily ensuring coaxiality of plastic part |
| CN208305603U (en) * | 2018-04-24 | 2019-01-01 | 德仕科技（深圳）有限公司 | High-precision full-automatic is molded grabbing device |
| CN209395190U (en) * | 2018-12-29 | 2019-09-17 | 无锡高晟成型科技有限公司 | A kind of molding mold insert location structure |
| CN109695697A (en) * | 2019-01-25 | 2019-04-30 | 上海创率复合材料有限公司 | Gear and gear manufacture method |
| CN209566451U (en) * | 2019-01-29 | 2019-11-01 | 天津原谷科技有限公司 | A kind of insert injection moulding screw gear injection mold with positioning device |
| CN111331789A (en) * | 2020-03-13 | 2020-06-26 | 上海希荷精密模具有限公司 | Injection mold of gear piece |
| CN111577863A (en) * | 2020-05-21 | 2020-08-25 | 上海芮朔精密模塑科技有限公司 | Rubber-coated injection-molded gear, injection molding process and mold |
| CN112128137A (en) * | 2020-10-15 | 2020-12-25 | 深圳市若腾科技有限公司 | Fan blade assembly and manufacturing method thereof |
| CN111958904A (en) * | 2020-10-23 | 2020-11-20 | 宁海县大鹏模具塑料有限公司 | Water holding barrel forming die |
| CN113500741A (en) * | 2021-07-09 | 2021-10-15 | 珠海凯邦电机制造有限公司 | Injection mould |
| CN216578910U (en) * | 2021-12-16 | 2022-05-24 | 东莞市银海塑胶电子有限公司 | Radiator fan metal middle tube coaxiality guaranteeing structure |
| CN217373227U (en) * | 2021-12-30 | 2022-09-06 | 无锡模达科技有限公司 | Pump mold for preventing graphite damage |
| CN217098675U (en) * | 2022-04-01 | 2022-08-02 | 天津理工大学中环信息学院 | Integrated into one piece little duplicate gear injection mold |
| CN115503189A (en) * | 2022-10-12 | 2022-12-23 | 江苏业森汽车零部件有限公司 | Method for producing automobile gear pump gear by central injection of mandrel and used die |
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| CN117359883A (en) | 2024-01-09 |
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