Rubber and metal piece rubber coating compression molding mold

Abstract

The utility model relates to a rubber and metal piece rubber coating compression molding forming die which comprises a bottom plate. The lower die assembly comprises a lower die plate movably arranged at the top of the bottom plate, a discharging groove formed in the top of the lower die plate, a lower cavity formed in the top of the lower die plate and coaxial with the discharging groove, and a lower runner formed in the top of the lower die plate and communicated with the lower cavity. The upper die assembly comprises an upper die plate arranged above the bottom plate in a liftable mode, a feeding groove formed in the bottom of the upper die plate and matched with the discharging groove, an upper cavity formed in the bottom of the upper die plate and matched with the lower cavity, and an upper runner formed in the bottom of the upper die plate and matched with the lower runner. By arranging the upper die assembly and the lower die assembly, the rubber is integrally formed on the peripheral surface of the metal column, so that the subsequent manual assembly step is omitted, and the production efficiency and the qualified rate of finished products are further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold technical field, concretely relates to a rubber and metal piece rubber coating die forming die. BACKGROUND

[0002] After injection mold product processing forming, need to the product is assembled.For the rubber wheel this kind of product, in order to be applicable to office automation's occasion (such as scanner, laser printer, bill printer etc.), generally will be penetrated two even more rubber wheel (such as the shaft of printer will be set two rubber wheel, main purpose is to ensure the stable transmission of printing paper and reduce friction).

[0003] In prior art, the assembly of rubber wheel and metal column is still manually completed by an operator, that is, the rubber wheel is assembled by manually picking up the metal column and then setting the rubber wheel, which has the problem of low efficiency, needs a large amount of manual labor and wastes cost, and the manual assembly cannot guarantee the consistency of the rubber wheel setting position and has the problem of rework. UTILITY MODEL CONTENTS

[0004] The utility model provides a rubber and metal piece rubber coating die forming die, solve the defect that manual assembly has low efficiency and high cost.

[0005] To achieve the above object, the utility model adopts the technical scheme of a rubber and metal piece rubber coating die forming die, which comprises:

[0006] A bottom plate;

[0007] A lower die assembly, which comprises a lower die plate movably arranged on the top of the bottom plate, a lower discharge groove formed on the top of the lower die plate, a lower cavity formed on the top of the lower die plate and coaxially arranged with the lower discharge groove, and a lower runner formed on the top of the lower die plate and in communication with the lower cavity;

[0008] An upper die assembly, which comprises an upper die plate liftably arranged above the bottom plate, an upper discharge groove formed on the bottom of the upper die plate and matched with the lower discharge groove, an upper cavity formed on the bottom of the upper die plate and matched with the lower cavity, and an upper runner formed on the bottom of the upper die plate and matched with the lower runner, and the metal piece is placed in the upper discharge groove and the lower discharge groove.

[0009] Optimally, it further comprises a feeding assembly embedded in the upper die plate and in communication with the upper runner, and an ejection assembly arranged on the side of the bottom plate away from the upper die assembly.

[0010] Optimally, the lower runner comprises a lower main runner formed on the top of the lower die plate, a lower auxiliary runner formed on the top of the lower die plate and in communication with the lower main runner and the lower cavity, and lower cold material wells formed at both ends of the lower main runner.

[0011] Optimally, the lower die assembly further comprises an ejection plate elastically arranged at the bottom of the lower die plate, a first ejection hole opened at the bottom of the lower main runner and penetrating the lower die plate, a second ejection hole opened at the bottom of the lower cavity and penetrating the lower die plate, and a first ejector rod and a second ejector rod fixed at the top of the ejection plate, the first ejector rod penetrating the first ejection hole, and the second ejector rod penetrating the second ejection hole.

[0012] Optimally, the upper runner comprises an upper main runner opened at the bottom of the upper die plate, an upper sub-runner opened at the bottom of the upper die plate and communicating with the upper main runner and the upper cavity, and upper cold material wells formed at both ends of the upper main runner.

[0013] Optimally, the feeding assembly comprises a mounting column embedded in the upper die plate, a mounting block integrally connected at the top of the mounting column, a feeding groove opened at the top of the mounting block, and a feeding channel penetrating the mounting column and communicating with the feeding groove and the upper main runner, the feeding channel gradually expands in diameter from top to bottom.

[0014] Optimally, the ejection assembly comprises a lifting groove penetrating the bottom plate, and a lifting plate arranged in the lifting groove in a liftable manner, the lifting plate cooperates with the ejection plate.

[0015] Optimally, the lower die assembly further comprises a drag plate fixed at the bottom of the lower die plate in a spaced manner, a guide hole penetrating the lower die plate, a guide rod fixed at the top of the ejection plate and penetrating the guide hole, a spring sleeved on the guide rod, and a positioning hole opened at the top of the lower die plate, the spring abuts between the lower die plate and the ejection plate, and the ejection plate abuts at the top of the drag plate.

[0016] Optimally, the upper die assembly further comprises a positioning column fixed at the bottom of the upper die plate and cooperating with the positioning hole, and a guide portion obliquely arranged at the bottom of the positioning column.

[0017] Thanks to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:

[0018] The rubber and metal part rubber coating mold forming die sets the upper die assembly and the lower die assembly, places the metal column to be rubber coated and formed in the lower die assembly, injects the molten rubber into the cavity after the mold is closed, thereby integrally forming the rubber on the outer circumferential surface of the metal column, so as to omit the subsequent manual assembly step, and further improve the production efficiency and the qualified rate of finished products. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The product structure after the rubber and metal part are formed is shown in the figure.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the present invention from another angle;

[0022] Figure 4 This is the left view of the present invention;

[0023] Figure 5 This is a partial structural schematic diagram of the present invention;

[0024] Figure 6 This utility model Figure 5 The main view;

[0025] Figure 7 This is a schematic diagram of the lower mold assembly of this utility model;

[0026] Figure 8 This is a schematic diagram of the upper mold assembly of this utility model;

[0027] Figure 9 This is a schematic diagram of the feeding assembly of this utility model;

[0028] Figure 10 This utility model Figure 9 A sectional view;

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Base plate; 2. First slide rail; 3. First slider; 4. Push cylinder; 5. Connecting plate; 6. Lifting groove; 7. Lifting cylinder; 8. Lifting plate; 11. Lower mold support plate; 12. Lower mold upright plate; 13. Lower template; 14. Positioning hole; 15. Material discharge groove; 16. Lower cavity; 17. Lower main runner; 18. Lower secondary runner; 19. Lower cold slug well; 20. First ejector hole; 21. Second ejector hole; 22. Ejector plate; 23. First ejector rod; 24. Second ejector rod 25. Guide hole; 26. Guide rod; 27. Spring; 28. Upper template; 29. ​​Positioning post; 30. Guide part; 31. Feeding trough; 32. Upper cavity; 33. Upper main flow channel; 34. Upper secondary flow channel; 35. Upper cold material well; 36. Through groove; 37. Mounting groove; 38. Mounting block; 39. Mounting post; 40. Feeding trough; 41. Feeding channel; 42. Gantry frame; 43. Second slide rail; 44. Second slider; 45. Lifting cylinder; 46. Clearance groove. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0032] like Figures 2-4As shown in the structure diagram of the rubber and metal piece encapsulation die forming die of the utility model, the forming die is usually used for forming Figure 1 As shown in the product, the rubber is integrally injection molded on the metal column to omit the subsequent manual assembly step, thereby improving the production efficiency and the qualified rate of finished products. The bottom plate 1 is fixed on the top of the support frame (the support frame is welded into a frame structure by aluminum profiles, mainly plays a supporting role, and the bottom plate 1 is fixed on the top of the support frame by screw fastening or welding, and the support frame of the frame structure can avoid the jacking cylinder 7).

[0033] The first sliding rail 2 is fixed on the top of the bottom plate 1 by screw fastening, the fixing direction of the first sliding rail 2 is parallel to the length direction of the bottom plate 1, and the first sliding block 3 is slidingly installed on the first sliding rail 2. The lower die assembly is fixed on the first sliding block 3, the push cylinder 4 drives the lower die assembly to move to the lower side of the upper die assembly along the sliding rail, and the injection molding of the rubber and the metal column is completed by the upper die assembly and the lower die assembly; after the molding is completed, the push cylinder 4 moves the lower die assembly out to the feeding station, and the operator takes out the molded product, and the metal column to be injection molded can be placed in the lower die assembly.

[0034] As Figures 5-7 As shown, the lower die assembly includes a lower die support plate 11, a lower die vertical plate 12, a lower die plate 13, a positioning hole 14, a lower feeding groove 15, a lower cavity 16, a lower main runner 17, a lower auxiliary runner 18, a lower cold material well 19, a first ejection hole 20, a second ejection hole 21, an ejection plate 22, a first ejector rod 23, a second ejector rod 24, a guide hole 25, a guide rod 26 and a spring 27. The lower die support plate 11 is fixed on the top of the first sliding block 3 by screw fastening, and an avoiding groove 46 is left between the two lower die support plates 11 to provide an avoiding space for the subsequent lifting of the lifting plate 8.

[0035] The lower die vertical plate 12 is fixed on the top of the lower die support plate 11 by screw fastening or welding, and the lower die vertical plate 12 is vertically arranged and perpendicular to the lower die support plate 11. The lower die plate 13 is fixed on the top of the lower die vertical plate 12 by screw fastening, and the lower die plate 13 cooperates with the upper die plate 28, so that the molten rubber is injection molded on the metal column after the mold is closed, thereby omitting the subsequent manual assembly step and improving the production efficiency.

[0036] The positioning hole 14 is formed on the top of the lower die plate 13 and cooperates with the positioning column 29 at the bottom of the upper die plate 28. During the injection molding, the lifting cylinder 45 drives the upper die plate 28 to descend to the top of the lower die plate 13, at this time, the positioning column 29 at the bottom of the upper die plate 28 is inserted into the positioning hole 14 on the top of the lower die plate 13, and the upper die plate 28 is positioned by relying on the cooperation of the positioning column 29 and the positioning hole 14, thereby improving the yield of the injection molded product.

[0037] The material feeding groove 15 is located at the top of the lower mold plate 13. The cross-section of the material feeding groove 15 is semi-circular. The metal column to be injection molded and overmolded is placed inside the material feeding groove 15 (e.g., Figure 7 As shown, in this embodiment, the lower mold plate 13 is a two-cavity mold, that is, two sets of material slots 15 are provided on one lower mold plate 13, which can simultaneously complete the overmolding injection molding of two metal pillars; the number of material slots 15 is not limited to two sets, and can be appropriately increased according to the size of the mold and the needs of production and processing.

[0038] The lower cavity 16 is located at the top of the lower mold plate 13 and is coaxially arranged with the material discharge groove 15. The cross-section of the lower cavity 16 is semi-circular. After the upper mold plate 28 and the lower mold plate 13 are closed, the molten rubber is injected into the runner and finally formed in the upper cavity 32 and the lower cavity 16, thereby integrally injection molding the rubber onto the metal pillar, eliminating the subsequent manual assembly steps and improving production efficiency (e.g., Figure 7 As shown, in this embodiment, two lower cavities 16 are correspondingly provided on a set of feeding grooves 15, which are formed into the shape after injection molding. Figure 1 The product structure shown; the number of lower cavities 16 is not limited to two, and the number of lower cavities 16 can be appropriately increased according to the actual shape of the product.

[0039] The lower main runner 17 is located at the top of the lower mold plate 13 and parallel to the material feed groove 15. The cross-section of the lower main runner 17 is semi-circular for easy mold opening. The lower main runner 17 is located in the middle of the two sets of material feed grooves 15, that is, the distance between the lower main runner 17 and one set of material feed grooves 15 is equal to the distance between the lower main runner 17 and the other set of material feed grooves 15. This ensures the synchronicity of the flow of molten plastic material, thereby improving production efficiency and ensuring the consistency of the molded product (if the lower main runner 17 is close to one set of material feed grooves 15, it will cause the molding speed on both sides to be inconsistent during injection molding, affecting the pass rate of the injection molded product).

[0040] The lower secondary runner 18 is located at the top of the lower mold plate 13 and connects the lower main runner 17 and the lower cavity 16. Molten material flows into the lower cavity 16 through the lower main runner 17 and the lower secondary runner 18 for molding. The lower secondary runner 18 has a semi-circular cross-section for easy mold opening. Since the lower main runner 17 is located in the middle of the two sets of discharge channels 15, the lengths of the lower secondary runners 18 are all the same. When the molten material flows into the lower cavity 16 through the lower secondary runner 18, the flow synchronization is ensured, thereby improving the success rate of injection molding.

[0041] like Figure 7 As shown, the two ends of the lower main channel 17 extend outward and protrude into the lower secondary channel 18, thereby forming a lower cold slug well 19 at both ends of the lower main channel 17. The lower cold slug well 19 is used to store the cold slug head flowing at the very front, so as to avoid injecting it into the lower cavity 16 and affecting the yield.

[0042] The first ejection hole 20 is arranged at the bottom of the lower main runner 17 and penetrates the lower die plate 13, and is located in the middle of the lower main runner 17. The first ejector rod 23 is arranged in the first ejection hole 20. When the second ejector rod 24 ejects the formed product, the first ejector rod 23 ejects the waste in the lower main runner 17. The first ejection hole 20 can also store the cold head flowing at the front end to avoid affecting the yield by injecting it into the lower cavity 16.

[0043] The second ejection hole 21 is arranged at the bottom of the lower cavity 16 and penetrates the lower die plate 13. The second ejector rod 24 is arranged in the second ejection hole 21. When the ejection plate 22 rises, the first ejector rod 23 and the second ejector rod 24 are synchronously raised. During this period, the formed metal column and rubber are ejected by the second ejector rod 24, and the waste in the lower main runner 17 is ejected by the first ejector rod 23. The second ejection hole 21 can also store the cold head flowing at the front end to avoid affecting the yield by injecting it into the lower cavity 16.

[0044] After the product is ejected, the surface of the rubber part still has waste, which needs to be cut and polished subsequently. The cut waste can be recycled and reused.

[0045] The guide hole 25 vertically penetrates the lower die plate 13. The ejection plate 22 is arranged at the top of the two lower die support plates 11 (the ejection plate 22 is not fixedly connected with the lower die support plate 11. The lower die support plate 11 only supports the ejection plate 22 upward to avoid the ejection plate 22 from falling). The guide rod 26 is fixed at the top of the ejection plate 22 and penetrates the guide hole 25. When the product is ejected, the lifting cylinder 7 drives the lifting plate 8 to rise. The lifting plate 8 moves upward against the ejection plate 22, and then the product is ejected by the first ejector rod 23 and the second ejector rod 24 on the ejection plate 22. The guide rod 26 and the guide hole 25 are arranged to guide the rising ejection plate 22 and improve the stability of the ejection movement.

[0046] The spring 27 is sleeved on the guide rod 26 and located between the lower die plate 13 and the ejection plate 22. When the ejection plate 22 rises to eject the product, the spring 27 is compressed. After the product is ejected, the ejection plate 22 is reset under the action of the spring 27.

[0047] As Figure 5 , 6The upper die assembly is arranged above the base plate 1 and can be lifted and lowered. When the injection molding is performed, the upper die assembly is lowered to the upper die plate 28 and the lower die plate 13, and after the injection molding, the upper die plate 28 is lifted to complete the demolding. The upper die assembly comprises the upper die plate 28, the positioning column 29, the guide part 30, the upper feeding groove 31, the upper cavity 32, the upper main runner 33, the upper auxiliary runner 34, the upper cold material well 35, the through groove 36 and the mounting groove 37. The positioning column 29 is fixed at the bottom of the upper die plate 28, and the positioning column 29 is matched with the positioning hole 14 of the lower die plate 13. When the injection molding is performed, the lifting cylinder 45 drives the upper die plate 28 to be lowered to the top of the lower die plate 13. At this time, the positioning column 29 at the bottom of the upper die plate 28 is inserted into the positioning hole 14 at the top of the lower die plate 13, and the positioning column 29 is matched with the positioning hole 14 to position the lowered upper die plate 28, thereby improving the yield of the injection molded product.

[0048] The guide part 30 is arranged at the bottom of the positioning column 29. When the positioning column 29 is lowered and inserted into the positioning hole 14, the guide part 30 guides the positioning column 29, so that the positioning column 29 is conveniently inserted into the positioning hole 14.

[0049] The upper feeding groove 31 is arranged at the bottom of the upper die plate 28, and the cross section of the upper feeding groove 31 is semicircular. The upper feeding groove 31 is matched with the lower feeding groove 15. When the injection molding is performed, the operator places the metal column to be rubber-coated into the lower feeding groove 15, and the pushing cylinder 4 pushes the lower die assembly to move below the upper die assembly. The lifting cylinder 45 drives the upper die plate 28 to be lowered to the top of the lower die plate 13. At this time, the upper feeding groove 31 and the lower feeding groove 15 hold the metal column together.

[0050] The upper cavity 32 is arranged at the bottom of the upper die plate 28 and is matched with the lower cavity 16. Since the upper cavity 32 and the lower cavity 16 are both semicircular, when the upper die plate 28 is lowered and the lower die plate 13 is matched, the upper cavity 32 and the lower cavity 16 form the entire injection molding cavity, so that the rubber is integrally injection molded on the peripheral surface of the metal column.

[0051] The upper main runner 33 is arranged at the bottom of the upper die plate 28 and is matched with the lower main runner 17. The upper auxiliary runner 34 is arranged at the bottom of the upper die plate 28 and is used to communicate the upper main runner 33 and the upper cavity 32. The upper cold material well 35 is formed at both ends of the upper main runner 33 and is used to store the cold material head at the front end, so as to avoid the cold material head from being injected into the lower cavity 16 and affecting the yield (after the upper die plate 28 and the lower die plate 13 are matched, the upper cavity 32 and the lower cavity 16 form the cavity, the upper main runner 33 and the lower main runner 17 form the main runner, the upper auxiliary runner 34 and the lower auxiliary runner 18 form the auxiliary runner, and the upper cold material well 35 and the lower cold material well 19 form the cold material well).

[0052] The installation groove 37 is arranged on the top of the upper die plate 28, the through groove 36 is arranged on the bottom of the installation groove 37 and is connected with the upper main runner 33, and the feeding assembly is embedded in the installation groove 37 and the through groove 36, so that the molten material is conveniently injected into the main runner.

[0053] As shown in Figure 9 , 10 , the installation column 39 is integrally connected to the bottom of the installation block 38, the installation block 38 is fixed in the installation groove 37 by screw fastening, and the installation column 39 is inserted in the through groove 36. The feeding groove 40 is arranged on the top of the installation block 38, the feeding groove 40 is in the shape of a bowl, and the molten material is conveniently injected. The feeding channel 41 penetrates through the installation column 39 and is connected with the feeding groove 40 and the main runner, and the feeding channel 41 is gradually expanded in diameter from top to bottom, on the one hand, facilitating the downward flow of the molten material, and on the other hand, facilitating the separation of the upper die plate 28 when the mold is opened.

[0054] As shown in Figures 1-3 , the gantry 42 is erected on the top of the bottom plate 1 by welding, the second sliding rail 43 is fixed on the inner side of the gantry 42 by screw fastening and is vertically arranged, and the second sliding block 44 is slidingly installed on the second sliding rail 43. The upper die plate 28 is fixed on the inner side of the second sliding block 44 by welding, and the stability of the lifting of the upper die plate 28 is improved by arranging the second sliding rail 43 and the second sliding block 44.

[0055] The cylinder body of the lifting cylinder 45 is fixed on the gantry 42 by screw fastening, the piston rod of the lifting cylinder 45 penetrates through the gantry 42 and is connected with the upper die plate 28 through a floating joint, and the upper die plate 28 is lifted by the lifting cylinder 45.

[0056] The connecting plate 5 is fixed on the same side of the two lower die supporting plates 11 by welding, the cylinder body of the pushing cylinder 4 is fixed on the bottom plate 1 by screw fastening, the piston rod of the pushing cylinder 4 is connected with the connecting plate 5 through a floating joint, and the lower die assembly is slidingly driven by the pushing cylinder 4.

[0057] The jacking groove 6 vertically penetrates through the bottom plate 1, the cylinder body of the jacking cylinder 7 is fixed on the bottom of the bottom plate 1 by screw fastening, the jacking plate 8 is fixedly connected to the piston rod of the jacking cylinder 7, and the jacking plate 8 is lifted by the jacking cylinder 7. When the jacking plate 8 rises, the ejection plate 22 is lifted by the jacking plate 8, and then the first ejection rod 23 and the second ejection rod 24 eject the formed product.

[0058] The top of the bottom plate 1 is fixed with a fan by screw fastening, the fan faces the lower die assembly, and the cooling of the product is accelerated during the mold closing and injection molding, and the production cycle is shortened.

[0059] The molding process of the rubber and metal part rubber coating mold pressing forming mold is shown as follows:

[0060] First operation workers will be placed in the lower die slot 15 of the lower die plate 13 metal column to be coated injection molding, push the cylinder 4 to push the lower die assembly moves to the lower of the upper die assembly, lift cylinder 45 driven by the upper die plate 28 down to the lower die plate 13 (the upper die plate 28 bottom positioning column 29 inserted into the positioning hole 14 of the lower die plate 13) is attached; the molten glue into the feed slot 40, the molten material along the feed channel 41, the main runner and the sub runner into the cavity into the molding, molding after lift cylinder 45 driven by the upper die plate 28 rises open mold, push the cylinder 4 will be moved to the lower die assembly feeding station, finally by the lift cylinder 7 driven by the lifting plate 8, the lifting plate 8 against the ejection plate 22 rises, by the first ejector rod 23 and the second ejector rod 24 after the molding products are ejected, the spring 27 is compressed, the product is ejected, the auxiliary ejection plate 22 is reset under the action of the spring 27.

[0061] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A rubber-metal overmolding mold, characterized in that, It includes: the bottom plate (1); the lower mold assembly, which includes the lower mold plate (13) movably arranged on the top of the bottom plate (1), the lower discharge groove (15) opened on the top of the lower mold plate (13), the lower cavity (16) opened on the top of the lower mold plate (13) and coaxially arranged with the lower discharge groove (15), and the lower runner which is opened on the top of the lower mold plate (13) and communicates with the lower cavity (16); the upper mold assembly, which includes the upper mold plate (28) arranged above the bottom plate (1), the upper discharge groove (31) opened on the bottom of the upper mold plate (28) and matched with the lower discharge groove (15), the upper cavity (32) opened on the bottom of the upper mold plate (28) and matched with the lower cavity (16), and the upper runner opened on the bottom of the upper mold plate (28) and matched with the lower runner, and the metal piece is placed in the upper discharge groove (31) and the lower discharge groove (15).

2. The rubber-to-metal encapsulation press molding die of claim 1, wherein: It also includes the feeding assembly embedded in the upper mold plate (28) and communicating with the upper runner, and the ejection assembly arranged on the side of the bottom plate (1) away from the upper mold assembly.

3. The rubber-to-metal encapsulation press molding die of claim 2, wherein: The lower runner includes the lower main runner (17) opened on the top of the lower mold plate (13), the lower auxiliary runner (18) opened on the top of the lower mold plate (13) and communicating the lower main runner (17) and the lower cavity (16), and the lower cold well (19) formed at both ends of the lower main runner (17).

4. The rubber-to-metal encapsulation press molding die of claim 3, wherein: The lower mold assembly further includes the ejection plate (22) elastically arranged on the bottom of the lower mold plate (13), the first ejection hole (20) opened on the bottom of the lower main runner (17) and penetrating the lower mold plate (13), the second ejection hole (21) opened on the bottom of the lower cavity (16) and penetrating the lower mold plate (13), and the first ejector rod (23) and the second ejector rod (24) fixed on the top of the ejection plate (22), the first ejector rod (23) penetrating the first ejection hole (20), and the second ejector rod (24) penetrating the second ejection hole (21).

5. The rubber-to-metal encapsulation press molding die of claim 2, wherein: The upper runner includes the upper main runner (33) opened on the bottom of the upper mold plate (28), the upper auxiliary runner (34) opened on the bottom of the upper mold plate (28) and communicating the upper main runner (33) and the upper cavity (32), and the upper cold well (35) formed at both ends of the upper main runner (33).

6. The rubber-to-metal encapsulation press molding die of claim 5, wherein: The feeding assembly includes the mounting column (39) embedded in the upper mold plate (28), the mounting block (38) integrally connected on the top of the mounting column (39), the feeding groove (40) opened on the top of the mounting block (38), and the feeding channel (41) penetrating the mounting column (39) and communicating the feeding groove (40) and the upper main runner (33), the feeding channel (41) gradually expands in diameter from top to bottom.

7. The rubber-to-metal encapsulation press molding die of claim 4, wherein: The ejection assembly includes the jacking groove (6) penetrating the bottom plate (1) and the jacking plate (8) arranged in the jacking groove (6) in a liftable manner, and the jacking plate (8) is matched with the ejection plate (22).

8. The rubber-to-metal encapsulation press molding die of claim 4, wherein: The lower die assembly further comprises a drag plate fixed at the bottom of the lower die plate (13), a guide hole (25) penetrating through the lower die plate (13), a guide rod (26) fixed at the top of the ejection plate (22) and penetrating through the guide hole (25), a spring (27) sleeved on the guide rod (26) and abutting between the lower die plate (13) and the ejection plate (22), and a positioning hole (14) opened at the top of the lower die plate (13), the top of the ejection plate (22) abutting the top of the drag plate.

9. The rubber-to-metal encapsulation press molding die of claim 8, wherein: The upper die assembly further comprises a positioning column (29) fixed at the bottom of the upper die plate (28) and matched with the positioning hole (14), and a guide portion (30) obliquely arranged at the bottom of the positioning column (29).

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