A rubber injection molding mold

Abstract

The utility model relates to a kind of rubber injection molding mould, it includes: lower mould component, the lower mould component includes lower mounting plate, lower mould plate fixed in the top of the lower mounting plate and lower punch integrally connected in the top of the lower mould plate;Upper mould component, the upper mould component includes the upper mounting plate of being set in the upper of the lower mounting plate, upper mould plate fixed in the bottom of the upper mounting plate and the upper forming cavity of being cooperated with the lower punch and being opened in the bottom of the upper mould plate;Side forming component, the side forming component is set between the upper mounting plate and lower mounting plate.The utility model rubber injection molding mould is installed side forming component between upper mould component and lower mould component, when mould is closed, the cooperation of extrusion part and abutting portion is used, side forming component is pushed inwards to form the sidewall of product;When mould is opened, side forming component is opened by the reset function of spring, avoid interference when mould is opened, shorten the time of mould opening, improve the efficiency of injection molding.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a rubber injection molding mold. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and replacements, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes.

[0003] Injection molds are typically of a top-and-bottom opening structure. Molten plastic is injected into the cavity to form the mold, and after cooling, the molded product is ejected. Figure 1 The rubber part shown has outwardly protruding buckle structures on both sides. Traditional top-and-bottom opening molds cannot form side structures due to the restriction of the mold opening direction. Therefore, it is necessary to add horizontal side forming blocks inside the mold. After the mold is closed, the side forming blocks are used to form the side wall structure of the product.

[0004] Currently, the side molding block cannot be opened simultaneously with the mold. When opening the mold, the side molding block needs to be pulled out first, and then the upper and lower molds need to be opened, which prolongs the mold opening time and reduces the efficiency of injection molding. Utility Model Content

[0005] This invention provides a rubber injection molding die in which the side molding block is automatically ejected when the die is opened, which shortens the die opening time and improves the efficiency of injection molding.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a rubber injection molding die, comprising:

[0007] The lower mold assembly includes a lower mounting plate, a lower template fixed to the top of the lower mounting plate, and a lower punch integrally connected to the top of the lower template.

[0008] The upper mold assembly includes an upper mounting plate that is vertically and flexibly disposed above the lower mounting plate, an upper template fixed to the bottom of the upper mounting plate, and an upper molding cavity formed at the bottom of the upper template and cooperating with the lower punch. The lower punch and the upper molding cavity are closed to form an injection molding cavity.

[0009] A side molding assembly is disposed between the upper mounting plate and the lower mounting plate. After the upper mold plate and the lower mold plate are closed, the side molding assembly slides to both sides of the injection cavity.

[0010] An ejector assembly is installed at the bottom of the lower mold assembly and is used to eject the formed product.

[0011] Optimally, the side molding assembly includes a slide plate slidably connected to the top of the lower mounting plate, a side molding block mounted inside the slide plate and cooperating with the injection molding cavity, a side molding cavity formed inside the side molding block, and a pushing mechanism for pushing the slide plate to slide.

[0012] Optimally, the pushing mechanism includes a protrusion integrally connected to the bottom of the upper mounting plate, a pressing part inclinedly disposed at the bottom of the protrusion, an abutting part inclinedly disposed on the outside of the slide plate and cooperating with the pressing part, a second spring groove formed on the inside of the slide plate, and a second spring disposed in the second spring groove, the second spring abutting between the lower template and the slide plate.

[0013] Optimally, the lower mold assembly further includes a cold slug well penetrating the lower mold plate, a main runner opened on the top of the lower mold plate and located on both sides of the cold slug well, and a secondary runner opened on both sides of the main runner, the secondary runner being connected to the injection cavity.

[0014] Optimally, the upper mold assembly further includes a feed post passing through the inner side of the upper mold plate and a feed channel passing through the feed post and connected to the cold sluice well, wherein the diameter of the feed channel gradually increases from top to bottom.

[0015] Optimally, the push rod assembly includes a lifting plate that is vertically mounted on the bottom of the lower mounting plate, a second push rod fixed to the top of the lifting plate and passing through the lower mounting plate and the lower punch, and a third push rod fixed to the top of the lifting plate and passing through the cold slug well.

[0016] Optimally, it also includes a first spring groove formed at the bottom of the lower mounting plate, a guide rod fixed to the top of the lifting plate, and a first spring sleeved on the guide rod, the first spring being located between the lifting plate and the lower mounting plate.

[0017] Ideally, it also includes a guide sleeve embedded in the lower mounting plate and a guide post fixed to the bottom of the upper mounting plate and cooperating with the guide sleeve.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] This utility model of rubber injection molding die installs a side molding component between the upper mold assembly and the lower mold assembly. When the upper mold assembly and the lower mold assembly are closed, the side molding component is pushed inward by the cooperation of the extrusion part and the abutment part to form the side wall structure of the product. When the mold is opened, the side molding component is pushed open by the reset function of the spring, which avoids interference during mold opening, shortens the mold opening time, and improves the efficiency of injection molding. Attached Figure Description

[0020] Figure 1 This is a structural diagram of an injection-molded product;

[0021] Figure 2 This is a schematic diagram of the structure of this utility model;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 This is a cross-sectional view of the present invention;

[0024] Figure 5 This is a cross-sectional view of the present invention;

[0025] Figure 6 This is a cross-sectional view of the present invention;

[0026] Figure 7 This is a cross-sectional view of the present invention;

[0027] Figure 8 This is a partial cross-sectional view of the present invention after mold assembly;

[0028] Figure 9 This is a schematic diagram of the bottom structure of the mounting plate of this utility model;

[0029] Figure 10 This is a schematic diagram of the structure of the lower mounting plate of this utility model;

[0030] Figure 11 This utility model Figure 10 Top view;

[0031] Figure 12 This is a schematic diagram of the molding block on the side after the mold is closed according to this utility model;

[0032] Figure 13 This utility model Figure 12 Enlarged view of point A in the middle;

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Base plate; 2. Support plate; 3. First top plate; 4. Second top plate; 5. Lower mounting plate; 6. First slot; 7. First through slot; 8. First spring slot; 9. Guide hole; 10. Guide rod; 11. First locking plate; 13. First spring; 14. Second slot; 15. Second through slot; 16. Second push rod; 17. Second locking plate; 18. Third slot; 19. Third through slot; 20. Third push rod; 21. Third locking plate; 22. Guide sleeve; 24. Top plate; 25. 16. Upper mounting plate; 27. Guide post; 28. Feed post; 29. ​​Feed runner; 30. Upper mold cavity; 31. Upper mold plate; 32. Upper forming cavity; 33. Protrusion; 34. Extrusion section; 35. Lower mold cavity; 36. Lower mold plate; 37. Cold slug well; 38. Main runner; 39. Secondary runner; 40. Slide plate; 41. Slide groove; 42. Slider; 43. Abutment part; 44. Side forming block; 45. Side forming cavity; 46. Second spring groove; 47. Second spring. Detailed Implementation

[0035] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0036] like Figure 2-7 The diagram shows a schematic of the rubber injection molding die of this utility model. The die mainly includes a lower mold assembly, an upper mold assembly, and a side molding assembly. During the closing process of the lower mold assembly and the upper mold assembly, the side molding assembly moves inward, thereby injection molding a side-side structure (such as...). Figure 1 The injection molded part shown.

[0037] The base plate 1 is a rectangular metal plate, which is fastened to the injection molding machine mounting platform with screws. A vertical through hole is opened in the middle of the base plate 1. A lifting cylinder is fixed at the bottom of the injection molding machine mounting platform. The piston rod of the lifting cylinder passes through the through hole on the base plate 1 and is fixed to the first top plate 3. When the product is injected, the lifting cylinder drives the piston rod to rise vertically, which drives the first top plate 3 to lift the product and achieve demolding.

[0038] There are two support plates 2, fixed to the top of the base plate 1 on both sides and spaced apart. The lower mounting plate 5 is fixed to the top of the support plate 2 and is used to install the lower template 35. Figure 4 As shown, the long screw passes through the base plate 1, the support plate 2 and the lower mounting plate 5 in sequence, thereby fixing the base plate 1, the support plate 2 and the lower mounting plate 5 together.

[0039] like Figure 10 , 11 As shown, the lower mold cavity 34 is located at the top of the lower mounting plate 5. The lower template 35 is inserted into the lower mold cavity 34 in a matching shape and is fixed in the lower mold cavity 34 of the lower mounting plate 5 by screws (e.g., Figure 5(As shown). The lower punch 36 is integrally formed on the top of the lower mold plate 35. The lower punch 36 mates with the upper molding cavity 31 at the bottom of the upper mold plate 30. After the upper mold plate 30 and the lower mold plate 35 are closed, the lower punch 36 is inserted into the upper molding cavity 31, thereby forming an injection cavity between the two. Molten rubber is injected into the injection cavity and cooled to form... Figure 1 The injection-molded product shown.

[0040] The upper punch 35 has multiple sets of through holes running vertically through it. Ejector pins from the ejector pin assembly pass through these through holes to eject the formed product. Side forming components are located on both sides of the lower mold plate 35. When the upper mold plate 30 and lower mold plate 35 are closed, as... Figure 12 , 13 As shown, the side molding components are pushed inward to both sides of the injection cavity, thereby forming the side structure of the injection molded product (such as...). Figure 1 (As shown).

[0041] like Figure 10 , 11 As shown, the cold slug well 37 vertically penetrates the lower mold plate 35 and the lower mounting plate 5. During injection molding, the molten plastic is injected into the cavity from the feed channel 28. The cold slug well 37 captures and accommodates the low-temperature slug head that has cooled and solidified at the front of the melt flow, preventing it from entering the cavity and affecting product quality. (Because when the molten plastic comes into contact with the low-temperature injection molding machine nozzle or channel wall before injection, the front part will cool and solidify rapidly due to heat dissipation, forming a "cold slug" with high viscosity and poor flowability. If this part of the cold slug is injected into the injection molding cavity, it will block the subsequent flow channels and thus affect the quality of the product.)

[0042] There are two main flow channels 38, located at the top of the lower mold plate 35 and on both sides of the cold sluice gate 37. The secondary flow channels 39 are located at the top of the lower mold plate 35 and are connected to the main flow channels 38. For example... Figure 11 As shown, the molding die is a two-cavity design (meaning two products can be molded in one injection). There are four secondary runners 39, with two runners 39 corresponding to each injection cavity. During actual injection, the molten material flows from both sides of the cold slug well 37 into the main runner 38, and then flows from the secondary runners 39 on both sides into the injection cavity. By setting up the main runner 38 and secondary runners 39, the material inlet is increased, improving injection efficiency, saving filling time, and preventing premature material cooling that could affect injection quality.

[0043] like Figure 4 As shown, the guide sleeve 22 is embedded at the four corners of the lower mounting plate 5, and the guide post 26 is embedded at the bottom of the upper mounting plate 25 and cooperates with the guide sleeve 22. When the upper template 30 and the lower template 35 are closed, the guide post 26 is inserted into the guide sleeve 22 to improve the fit of the mold and avoid positional deviation during mold closing, which could damage the mold.

[0044] like Figure 4 As shown, the upper mounting plate 25 is fixed to the lower surface of the top plate 24 by screws. When the top plate 24 rises and falls, it drives the upper mounting plate 25 to rise and fall synchronously, thereby completing the mold opening or closing (the top plate 24 is mounted on the moving platen of the injection molding machine, and the moving platen is powered by a hydraulic system to move with the top plate 24). Figure 5 , 6 As shown in Figures 7 and 9, the upper mold cavity 29 is opened at the bottom of the upper mounting plate 25, and the upper template 30 is inserted into the upper mold cavity 29 at the bottom of the upper mounting plate 25 in a matching shape. Then, the upper template 30 is fixed in the upper mold cavity 29 at the bottom of the upper mounting plate 25 by means of screw fastening.

[0045] The bottom of the upper mold plate 30 has an upper molding cavity 31 that mates with the lower punch 36. After the upper mold plate 30 and the lower mold plate 35 are closed, the lower punch 36 is inserted into the upper molding cavity 31, thereby forming an injection molding cavity between the two. Molten rubber is injected into the injection molding cavity and cooled to form a molded shape. Figure 1 The injection-molded product shown.

[0046] like Figure 7 As shown, the feed column 27 is vertically inserted into the top plate 24, the upper mounting plate 25 and the upper template 30. The feed channel 28 passes through the feed column 27 and cooperates with the cold material well 37. The diameter of the feed channel 28 gradually expands from top to bottom, which facilitates the flow of the rubber material and avoids blockage of the rubber material at the inlet.

[0047] like Figure 9 , 10 As shown in Figures 12 and 13, the lower template 35 has grooves 41 on both sides, and the slide plate 40 has sliders 42 integrally connected to both sides, which cooperate with the grooves 41. By setting the grooves 41 and sliders 42 that cooperate with each other, the sliding stability of the slide plate 40 is improved. The abutment part 43 is inclinedly arranged on the outside of the slide plate 40. The abutment part 43 cooperates with the extrusion part 33 and pushes the slide plate 40 inward when the mold is closed, thereby pushing the side forming block 44 on the inside of the slide plate 40 to both sides of the injection cavity.

[0048] The protrusion 32 is integrally connected to the bottom of the upper mounting plate 25, and the pressing part 33 is inclinedly disposed on the inner side of the protrusion 32 and cooperates with the abutment part 43. Figure 8 As shown, the second spring groove 46 is formed on the inner side of the slide plate 40, and the second spring 47 is disposed in the second spring groove 46, and the second spring 47 abuts against the lower template 35 and the slide plate 40. Figure 12 , 13 As shown, the side forming block 44 is installed on the inner side of the slide plate 40, and the side forming cavity 45 is formed on the inner side of the side forming block 44 for forming. Figure 1 The side structure of the product shown.

[0049] During the mold closing process of the upper mold plate 30 and the lower mold plate 35, the extrusion part 33 contacts the abutment part 43, thereby pushing the slide plate 40 inward. At this time, the slide plate 40, which slides inward, pushes the side molding block 44 inward to both sides of the injection cavity. The side molding cavity 45 inside the side molding block 44 cooperates with the injection cavity to form the mold. Figure 1 As shown in the product, the second spring 47 is compressed at the same time. When the mold is opened, the second spring 47 resets to the outer side molding block 44 under the reset action, so that the ejector assembly can eject the molded product.

[0050] like Figure 5 As shown, the first spring groove 8 is located at the bottom of the lower mounting plate 5, and the guide hole 9 passes through the lower mounting plate 5 and communicates with the first spring groove 8. The first top plate 3 and the second top plate 4 are fixedly connected by screws. The first top plate 3 is connected to the piston rod of the lifting cylinder. The lifting cylinder drives the first top plate 3 to rise, thereby lifting the injection-molded product. The first slot 6 is located at the bottom of the second top plate 4, and the first through groove 7 passes through the second top plate 4 and communicates with the first slot 6. The first clamping plate 11 is integrally connected to the bottom of the guide rod 10 and is clamped in the first slot 6.

[0051] like Figure 5 As shown, the first clamping plate 11 is engaged in the first clamping groove 6 and simultaneously held by the first top plate 3 and the second top plate 4 to prevent the guide rod 10 from shaking. When the lifting cylinder drives the first top plate 3 to rise, it will drive the guide rod 10 to rise synchronously. By setting the guide hole 9 and the guide rod 10 to cooperate with each other, the stability of the push rod when it is ejected is improved. The first spring 13 is set in the first spring groove 8 and sleeved on the guide rod 10. When the push rod ejects the product, the first spring 13 is compressed. When the lifting cylinder drives the push rod to reset, the first spring 13 assists the guide rod 10 to reset under the action of the guide rod 10.

[0052] like Figure 6 As shown, the second slot 14 is located at the bottom of the second top plate 4, the second through slot 15 passes through the second top plate 4 and is connected to the second slot 14, the second locking plate 17 is engaged in the second slot 14, and the second ejector rod 16 is integrally connected to the top of the second locking plate 17 and extends upward through the lower mounting plate 5, the lower template 35, and the lower punch 36, and is used to eject the molded product after injection molding. Figure 6 As shown, the second card plate 17 is inserted into the second card slot 14 and is held by the first top plate 3 and the second top plate 4, which prevents the second push rod 16 from shaking when it is pushed out.

[0053] like Figure 7As shown, the third slot 18 is opened at the bottom of the second top plate 4, the third through slot 19 passes through the second top plate 4 and is connected to the third slot 18, the third plate 21 is engaged in the third slot 18, and the third ejector rod 20 is integrally connected to the top of the third plate 21 and extends upward through the lower mounting plate 5 and is placed in the cold slug well 37. During injection molding, it is used to seal the cold slug well 37 to prevent material leakage downward. When the product is ejected, the product is ejected by the second ejector rod 16 and the cold slug head in the cold slug well 37 is ejected by the third ejector rod 20 to facilitate the next injection molding.

[0054] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rubber injection molding die, characterized in that, It includes: The lower mold assembly includes a lower mounting plate (5), a lower template (35) fixed to the top of the lower mounting plate (5), and a lower punch (36) integrally connected to the top of the lower template (35). The upper mold assembly includes an upper mounting plate (25) that is vertically mounted above the lower mounting plate (5), an upper template (30) fixed to the bottom of the upper mounting plate (25), and an upper molding cavity (31) opened at the bottom of the upper template (30) and cooperating with the lower punch (36). The lower punch (36) and the upper molding cavity (31) are closed to form an injection molding cavity. Side forming assembly, the side forming assembly is disposed between the upper mounting plate (25) and the lower mounting plate (5), and after the upper template (30) and the lower template (35) are closed, the side forming assembly slides to both sides of the injection cavity; An ejector assembly is installed at the bottom of the lower mold assembly and is used to eject the formed product.

2. The rubber injection molding die according to claim 1, characterized in that: The side molding assembly includes a slide plate (40) slidably connected to the top of the lower mounting plate (5), a side molding block (44) installed inside the slide plate (40) and cooperating with the injection molding cavity, a side molding cavity (45) formed inside the side molding block (44), and a pushing mechanism for pushing the slide plate (40) to slide.

3. A rubber injection molding die according to claim 2, characterized in that: The pushing mechanism includes a protrusion (32) integrally connected to the bottom of the upper mounting plate (25), a pressing part (33) inclinedly disposed at the bottom of the protrusion (32), an abutting part (43) inclinedly disposed on the outside of the slide plate (40) and cooperating with the pressing part (33), a second spring groove (46) opened on the inside of the slide plate (40), and a second spring (47) disposed in the second spring groove (46), the second spring (47) abutting between the lower template (35) and the slide plate (40).

4. A rubber injection molding die according to claim 1, characterized in that: The lower mold assembly also includes a cold slug well (37) penetrating the lower mold plate (35), a main flow channel (38) opened on the top of the lower mold plate (35) and located on both sides of the cold slug well (37), and a secondary flow channel (39) opened on both sides of the main flow channel (38), wherein the secondary flow channel (39) is connected to the injection cavity.

5. A rubber injection molding die according to claim 4, characterized in that: The upper mold assembly also includes a feed column (27) passing through the inner side of the upper mold plate (30) and a feed channel (28) passing through the feed column (27) and connected to the cold sluice well (37), wherein the diameter of the feed channel (28) gradually increases from top to bottom.

6. A rubber injection molding die according to claim 4, characterized in that: The push rod assembly includes a lifting plate that is vertically mounted on the bottom of the lower mounting plate (5), a second push rod (16) fixed to the top of the lifting plate and passing through the lower mounting plate (5) and the lower punch (36), and a third push rod (20) fixed to the top of the lifting plate and passing through the cold sluice (37).

7. A rubber injection molding die according to claim 6, characterized in that: It also includes a first spring groove (8) formed at the bottom of the lower mounting plate (5), a guide rod (10) fixed to the top of the lifting plate, and a first spring (13) sleeved on the guide rod (10), the first spring (13) being located between the lifting plate and the lower mounting plate (5).

8. A rubber injection molding die according to claim 1, characterized in that: It also includes a guide sleeve (22) embedded in the lower mounting plate (5) and a guide post (26) fixed to the bottom of the upper mounting plate (25) and cooperating with the guide sleeve (22).

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