Quick demoulding structure of soft rubber mould and mould thereof

Abstract

The utility model discloses a rapid demolding structure of a soft rubber mold and the mold thereof, belongs to the field of injection molds, is used for soft rubber injection molding, and comprises a push rod fixing seat with a fixing seat inner cavity; a push rod is arranged in a fixing seat inner cavity of the push rod fixing seat, and the outer wall of the push rod is attached to the inner wall of the fixing seat inner cavity in a sliding mode. One or more air passages are arranged on the inner wall of the inner cavity of the fixed seat; two ends of the air passages are respectively communicated with the end surfaces of the push rod fixed seat corresponding to the bottom end outlet and the top end outlet of the inner cavity; the bottom end of the push rod extends out of an inner cavity of the fixing base and is connected with a limiting block which is connected with a spring. The top end of the push rod extends out of the inner cavity of the fixing base and is provided with an injection molding body, and a step structure lapped to the top end outlet end face of the inner cavity is formed in the joint position of the injection molding body and the push rod. The demolding convenience of the soft rubber product after injection molding can be improved, and the injection molding efficiency of the soft rubber product can be improved without a complex demolding tool or an auxiliary device.

Description

Technical Field

[0001] This application belongs to the field of injection molds. Specifically, it particularly relates to a rapid demolding structure for soft rubber molds used in soft rubber injection production and its mold. Background Art

[0002] After the soft rubber sleeve is injection-molded, since its formed structure adheres to the injection mold, it cannot be automatically separated. This leads to problems such as low demolding efficiency and large product deformation during the demolding of the soft rubber sleeve after injection molding. In response to the above technical problems, the patent document with the Chinese patent publication number CN115256838A discloses an automatic separation device for injection-molded rubber sleeves, and specifically discloses the following technical solution: including a machine plate, a fixing unit, and a pushing block combined with the injection-molded soft rubber to be separated; a first pulling unit is arranged on one side of the pushing block fixing unit. The first pulling unit includes a first base, a first driving mechanism, and a first mechanical claw. The lower end of the first base is fixed on the machine plate, and the upper end is provided with a first inclined surface structure, and the first inclined surface structure is inclined towards the side of the pushing block fixing unit. The first driving mechanism is connected to the first mechanical claw and is arranged obliquely along the inclined direction of the first inclined surface structure. The first mechanical claw points to the first edge of the injection-molded soft rubber; the second pulling unit structure is the same as the first pulling unit. The jacking unit includes a third driving mechanism and at least one jacking rod. The lower end of the jacking rod is connected to the third driving mechanism, and the upper end of the jacking rod points to the lower side of the injection-molded soft rubber. The third driving mechanism can drive the jacking rod to jack up the injection-molded soft rubber. The present invention can ensure product consistency and high production efficiency.

[0003] However, for the technical solution disclosed in the above prior art, it uses mechanical structures such as the first pulling unit and the second pulling unit to clamp the injection-molded soft rubber, and realizes the separation of the injection-molded soft rubber with the cooperation of the jacking unit. Not only is the structure relatively complex, but the cooperation and operation accuracy requirements of each execution unit are relatively high, which is extremely likely to cause an increase in manufacturing costs. Summary of the Invention

[0004] The purpose of this application is to provide a rapid demolding structure for a soft rubber mold and its soft rubber mold, which can improve the convenience of demolding the soft rubber product after injection molding, and can help improve the injection molding efficiency of the soft rubber product without complex demolding tools or auxiliary devices.

[0005] To achieve the above object, this application is realized through the following technical solutions:

[0006] A rapid demolding structure for a soft rubber mold described in this application includes a push rod fixing seat. The push rod fixing seat has a fixing seat inner cavity that penetrates the push rod fixing seat. The fixing seat inner cavity has an inner cavity bottom outlet and an inner cavity top outlet. A push rod is arranged in the fixing seat inner cavity of the push rod fixing seat. Both ends of the push rod extend out from the inner cavity bottom outlet and the inner cavity top outlet respectively. The outer wall of the push rod fits and slides with the inner wall of the fixing seat inner cavity. One or more air channels are arranged on the inner wall of the fixing seat inner cavity. Both ends of the air channel penetrate the corresponding push rod fixing seat end faces at the inner cavity bottom outlet and the inner cavity top outlet respectively. The bottom end of the push rod is connected to a limit block, and the limit block is connected to a spring. The top end of the push rod is provided with an injection molded body, and a step structure that overlaps the end face of the inner cavity top outlet is formed at the connection position between the injection molded body and the push rod.

[0007] As one of the preferred technical solutions of this application, the connection position between the limit block and the push rod is fixed by a limit pin.

[0008] As one of the preferred technical solutions of this application, the push rod fixing seat is respectively provided with a fixing seat bottom limit and a fixing seat top limit.

[0009] As one of the preferred technical solutions of this application, the top end face of the injection molded body has a ejector rod protruding from the end face.

[0010] A soft rubber mold equipped with the rapid demolding structure of the soft rubber mold includes a fixed mold and a moving mold. The fixed mold is slidably connected to the moving mold guide rod on the moving mold through a fixed mold guide hole. A moving mold linkage rod is arranged on the end face where the moving mold contacts the fixed mold in the mold closing process. The moving mold linkage rod drives two injection cores to approach each other during the mold closing process and form an injection cavity for the soft rubber product after the mold is closed. An injection molded body is arranged at the fixed mold between the two injection cores. The injection molded body is located in the injection cavity formed by the injection cores after the mold is closed. The injection molded body is connected to a push rod. The push rod passes through the fixed seat limit block through the push rod fixing seat. The fixed seat limit block is located at the mold closing end face of the fixed mold. The push rod fixing seat is fixed in the fixed seat limit block. After passing through the push rod fixing seat, the push rod extends into the spring accommodation cavity of the fixed mold. A spring is placed in the spring accommodation cavity. The spring is connected to the bottom end of the push rod through a limit block and a limit pin. The spring accommodation cavity is communicated with the fixed mold intake air channel of the fixed mold. The fixed mold intake air channel is connected with a fixed mold intake pipe at the inlet end. The fixed mold intake pipe is fixed on the fixed mold. The moving mold is provided with a runner splitting block at the mold closing end face. The runner splitting block is communicated with the injection runner on the moving mold.

[0011] As one of the preferred technical solutions of this application, the fixed mold is respectively provided with sliding limit blocks on both sides of the mold closing end face. The sliding limit blocks on both sides of the fixed mold form a slideway for the core linkage block to slide. The core linkage block is connected to the corresponding injection core. A core linkage hole that cooperates with the moving mold linkage rod is also machined on the core linkage block.

[0012] As one of the preferred technical solutions of the present application, a limit pin is provided at the connection position between the limit block and the push rod. The push rod fixing seat is connected through the bottom limit of the fixing seat, the top limit of the fixing seat and the fixing seat limit block. The bottom end of the push rod fixing seat is located in the spring accommodating cavity, and the top end of the push rod fixing seat is located at the mold closing end face position of the fixed mold and is covered by the injection molded core after mold closing.

[0013] As one of the preferred technical solutions of the present application, a shunt fixing rod is installed on the fixing seat limit block of the fixed mold. The top end of the shunt fixing rod passes through the fixing seat limit block and the injection molded core after mold closing and extends into the injection runner.

[0014] Compared with the prior art, the beneficial effects of the present application are:

[0015] By improving the rapid demolding structure of the soft rubber mold, the present application realizes the rapid separation of the soft rubber product from the injection molded body after injection molding, which is convenient for the operator to demold the soft rubber, and there is no need for complex demolding machinery or auxiliary mechanical structures, which helps to improve the demolding efficiency and quality and is convenient for the injection molding operation of the soft rubber product. Description of the Drawings

[0016] Figure 1 is the three-dimensional Figure 1 .

[0017] Figure 2 is the front view of the rapid demolding structure of the soft rubber mold described in the present application (including the soft rubber product after injection molding).

[0018] Figure 3 is Figure 2 the cross-sectional view at the position and direction shown by A-A in

[0019] Figure 4 is the three-dimensional Figure 1 .

[0020] Figure 5 is the three-dimensional Figure 2 .

[0021] Figure 6 is the three-dimensional view of the fixed mold in the present application.

[0022] Figure 7 is the front view of the fixed mold in the present application.

[0023] Figure 8 is Figure 7 the cross-sectional view at the position and direction shown by B-B in

[0024] Figure 9Yes Figure 7 A cross-sectional view taken at the position and in the direction shown by C-C in the figure.

[0025] Figure 10 This is a perspective view of the moving mold in the present application.

[0026] Figure 11 This is the front view of the moving mold in the present application.

[0027] Figure 12 Yes Figure 11 A cross-sectional view taken at the position and in the direction shown by D-D in the figure.

[0028] In the figure: 1. Spring; 2. Limit block; 3. Limit pin; 4. Push rod fixing seat; 5. Push rod; 6. Blowing gap; 7. Air passage; 8. Soft rubber product; 9. Fixed mold; 10. Moving mold; 11. Fixed mold inlet pipe; 12. Fixed mold inlet passage; 13. Injection molding core; 14. Moving mold linkage rod; 15. Bottom limit of the fixing seat; 16. Top limit of the fixing seat; 17. Sliding limit block; 18. Injection molding body; 19. Spring accommodation cavity; 20. Fixing seat limit block; 21. Moving mold guide rod; 22. Injection molding runner; 23. Runner splitting block; 24. Core linkage hole; 25. Ejector rod; 26. Fixed mold guide hole; 27. Core linkage block; 28. Splitting fixing rod. Detailed implementation manners

[0029] The technical solution of the present application will be further described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment 1

[0031] As Figures 1 to 5 shown, a rapid demolding structure for a soft rubber mold includes a push rod fixing seat 4. A fixing seat inner cavity penetrating the push rod fixing seat 4 is provided in the push rod fixing seat 4. The fixing seat inner cavity forms an inner cavity bottom end outlet at the bottom end of the push rod fixing seat 4 and an inner cavity top end outlet at the top end of the push rod fixing seat 4. The push rod fixing seat 4 is slidably connected to the push rod 5 through the fixing seat inner cavity, and the outer wall of the push rod 5 is in contact with and slides on the inner wall of the fixing seat inner cavity. A linear groove formed air passage 7 is machined on the fixing seat inner cavity of the push rod fixing seat 4, and both ends of the air passage 7 communicate with the corresponding bottom end and top end of the push rod fixing seat 4 respectively.

[0032] Both ends of the push rod 5 extend out of the fixing seat inner cavity respectively. A limit block 2 is connected to the bottom end of the push rod 5. A step structure is formed at the connection position between the limit block 2 and the push rod 5, and the limit block 2 is connected to the spring 1. In order to achieve the detachable connection between the limit block 2 and the push rod 5, pin holes are machined on both the limit block 2 and the push rod 5, and they are connected through a limit pin 3.

[0033] The top end of the push rod 5 is connected with an injection molded body 18. A stepped structure is formed at the connection position between the injection molded body 18 and the push rod 5, and this stepped structure overlaps with the top end face of the push rod fixing seat 4.

[0034] On the outer walls of the push rod fixing seat 4 near the bottom end and near the top end respectively, a fixing seat bottom limit 15 and a fixing seat top limit 16 are machined. The fixing seat bottom limit 15 and the push rod fixing seat 4 form a stepped structure to facilitate cooperation with the fixing seat limit block 20. The fixing seat top limit 16 is an annular groove machined on the outer wall of the push rod fixing seat 4 for cooperating with two injection molded cores 13. The top end face of the injection molded body 18 has a ejector rod 25 formed by protruding from the end face structure.

[0035] Embodiment 2

[0036] As Figures 6 to 12 shown, a mold equipped with the soft rubber mold rapid demolding structure described in Embodiment 1 includes a stationary mold 9 and a moving mold 10. The stationary mold 9 is installed on the workbench of the injection molding machine, and the moving mold 10 is installed at the injection end of the injection molding machine. On the end face of the stationary mold 9 that is closed with the moving mold 10, a stationary mold guide hole 26 is machined, and the stationary mold guide hole 26 penetrates through the sliding limit blocks 17 on both sides of the end face of the stationary mold 9 for closing the mold.

[0037] The sliding limit blocks 17 form slideways on both sides of the end face of the stationary mold 9 for limiting the sliding of the core linkage block 27. A core linkage hole 24 is machined on the core linkage block 27, and injection molded cores 13 are respectively connected to the core linkage block 27. The injection molded cores 13 corresponding to the core linkage block 27 can form an injection cavity after closing the mold, and the injection molded body 18 is accommodated in the injection cavity.

[0038] The core linkage hole 24 is an inclined hole, which can cooperate with the moving mold linkage rod 14 on the moving mold 10 to realize the mutual approach and separation of the two parts of the injection molded cores 13 during the mold closing and mold opening processes of the stationary mold 9 and the moving mold 10, facilitating injection molding and demolding after injection molding.

[0039] In this application, a fixed mold intake pipe 11 is further installed on the fixed mold 9. The fixed mold intake pipe 11 is communicated with a fixed mold intake channel 12 inside the fixed mold 9. The fixed mold intake channel 12 is communicated with a spring accommodation cavity 19 inside the fixed mold 9. The spring accommodation cavity 19 is communicated with a placement groove of the fixed seat limit block 20. A spring 1 and a limit block 2 are placed inside the spring accommodation cavity 19. A push rod fixed seat 4 is installed inside the fixed seat limit block 20 through a fixed seat bottom limit 15. The top end face of the fixed seat limit block 20 is flush with the bottom end face of a fixed seat top limit 16 of the push rod fixed seat 4. The fixed seat top limit 16, a part of the push rod fixed seat 4 above it, and an injection molded body 18 connected to the push rod 5 are all located inside an injection cavity formed after the injection core 13 is closed. There is a gap for forming a soft rubber product 8 between the inner wall of the injection cavity formed by the injection molded body 18 and the injection core 13.

[0040] The top end face of the injection molded body 18 or the top end face of a core linkage block 27 provided thereon extends out of the injection core 13.

[0041] The moving mold 10 has a moving mold guide rod 21 corresponding to a fixed mold guide hole 26. The moving mold guide rod 21 is inserted into the moving mold guide rod 21 and moves relative to the moving mold guide rod 21. The moving mold 10 is respectively provided with moving mold linkage rods 14 on both sides of the closing end face with the fixed mold 9. The moving mold linkage rods 14 cooperate with core linkage holes 24 to drive the two parts of the injection core 13 to move relative to each other. The fixed mold 9 is provided with a runner splitting block 23 at a position corresponding to the injection core 13 after closing. The runner splitting block 23 is communicated with an injection runner 22 on the moving mold 10 to facilitate conveying the molten injection material to a plurality of injection cavities on the injection core 13. The fixed mold 9 is provided with a splitting fixed rod 28 at a position corresponding to the injection runner 22. The bottom end of the splitting fixed rod 28 is located in the fixed seat limit block 20, and passes through the injection core 13 after closing and enters the injection runner 22.

[0042] Based on the above embodiments, the following paragraphs are used to continue to describe in detail the technical features involved and the functions and roles played by these technical features in this technical solution, so as to help those skilled in the art fully understand the technical solution and reproduce it.

[0043] See Figures 1 to 12For the structure shown, the push rod fixing seat 4 described in the present application can be a tubular structure. A fixing seat inner cavity is coaxially machined at the central axis position of the push rod fixing seat 4, and the fixing seat inner cavity penetrates through the push rod fixing seat 4. That is, the push rod fixing seat 4 is slidably connected to the push rod 5 through the fixing seat inner cavity, and both ends of the push rod 5 extend out of the push rod fixing seat 4 and are respectively connected to the limit block 2 and the injection molded body 18. Among them, the injection molded body 18 can cooperate with the injection cavity formed by the injection core 13 after mold clamping, facilitating the subsequent injection and molding of the soft rubber product 8. The limit block 2 can facilitate the limitation of the push rod 5 in the push rod fixing seat 4 and the connection between the push rod 5 and the spring 1. Specifically, the outer diameter of the limit block 2 is larger than that of the push rod 5, and a stepped structure is formed at the connection position between the two. The limit block 2 and the push rod 5 adopt a detachable connection method, such as a limit pin 3, which is convenient for replacement and maintenance.

[0044] In terms of installation and cooperation, a stepped structure (which can be understood as the bottom end of the injection molded body 18) is formed at the connection position between the injection molded body 18 and the push rod 5. This stepped structure facilitates the lap with the top end face of the push rod fixing seat 4 and also facilitates the formation of the outlet of the air duct 7 at this position.

[0045] In the present application, the air duct 7 is located on the inner wall of the fixing seat inner cavity of the push rod fixing seat 4, and can be one or more. When there are multiple air ducts 7, they can be evenly distributed in the fixing seat inner cavity.

[0046] The bottom end of the air duct 7 penetrates through the bottom end of the push rod fixing seat 4 to facilitate the inflow of air, and the top end of the air duct 7 penetrates through the top end of the push rod fixing seat 4 to facilitate the outflow of air and the entry into the blowing gap 6 between the bottom end of the injection molded body 18 and the top end of the push rod fixing seat 4.

[0047] The injection molded body 18 can be processed with an integral ejector rod 25 on the top end face. The ejector rod 25 can be subjected to the force from the moving mold 10 during mold clamping, and then the bottom end of the injection molded body 18 described in the above paragraph is attached to the top end of the push rod fixing seat 4. During mold opening, the force from the moving mold 10 acting on the ejector rod 25 disappears, and under the reset action of the spring 1, the bottom end of the injection molded body 18 is separated from the top end of the push rod fixing seat 4 to form a blowing gap 6 for the air flow in the air duct 7 to flow out.

[0048] In the present application, the spring 1 is located in the spring accommodation cavity 19. The spring accommodation cavity 19 is located inside the stationary mold 9 and communicates with the stationary mold intake passage 12. The stationary mold intake passage 12 is connected to the supply pipeline through the stationary mold intake pipe 11 located outside the stationary mold 9. In this way, the air flow sent by the supply pipeline can enter the spring accommodation cavity 19 through the stationary mold intake passage 12, and then enter the air duct 7 through the spring accommodation cavity 19, and enter the fitting gap between the injection molded body 18 and the push rod fixing seat 4 through the air duct 7.

[0049] Above the spring accommodation cavity 19 of the stationary mold 9, a fixed seat limit block 20 is further installed. Inside the fixed seat limit block 20, a fixed seat bottom limit 15 is installed through a stepped groove, and the installation limit of the push rod fixed seat 4 is achieved through the fixed seat bottom limit 15. A sealing ring installation groove and a sealing ring are provided at a position close to the fixed seat bottom limit 15. The sealing ring can achieve good airtightness through the installation of the through hole of the fixed seat limit block 20, preventing air flow from entering between the push rod fixed seat 4 and the through hole of the fixed seat limit block 20.

[0050] In this application, the push rod fixed seat 4 includes a fixed seat top limit 16 that extends out of the fixed seat limit block 20 at the top and enters the mold closing end face, and can be covered by the injection cavity formed by the injection core 13 after mold closing. That is to say, the injection cavity formed by the injection core 13 can not only accommodate the injection molded body 18, but also cooperate with the fixed seat top limit 16, so that the top end and part of the outer wall of the push rod fixed seat 4 (including the outer wall of part of the fixed seat top limit 16) are accommodated in the injection cavity to achieve the sealing and limitation of the bottom of the injection cavity, making the injection cavity meet the injection conditions.

[0051] At the same time, the top end and outer wall of the push rod fixed seat 4 located in the injection cavity can be covered by the soft rubber product 8, and then the contact position between the push rod fixed seat 4 and the injection molded body 18 is covered, facilitating the subsequent ventilation separation.

[0052] When this application is working, during the mold closing process, a part of the moving mold linkage rod 14 on the moving mold 10 is located outside the core body linkage block 27, and a part is inserted into the core body linkage hole 24. Since both the moving mold linkage rod 14 and the core body linkage hole 24 are obliquely arranged, during the mold closing process, the moving mold linkage rod 14 can drive the core body linkage hole 24 to make the core body linkage block 27 approach each other along the sliding limit block 17, and an injection cavity is formed in the two parts of the injection core 13 after mold closing. At this time, the moving mold 10 after mold closing can contact the ejector rod 25 through the runner splitter block 23, so that the ejector rod 25 that originally protruded from the injection core 13 is pressed back into the injection core 13. The injection molded body 18 and the push rod 5 connected to the ejector rod 25 move downward synchronously. The end face of the injection molded body 18 fits with the end face of the push rod fixed seat 4, and the push rod 5 applies a force to the spring 1 through the limit block 2 at the bottom end. The spring 1 deforms in the spring accommodation cavity 19.

[0053] The injection molding machine feeds the molten plastic through the injection runner 22. The injection runner 22 feeds the molten plastic into the runner splitter block 23. The runner on the runner splitter block 23 feeds the molten plastic into the injection runner of the injection core 13 and then flows to different injection cavities.

[0054] After the injection molding is completed, the fixed mold 9 is separated from the movable mold 10. Driven by the linkage rod 14 of the movable mold, the core body linkage block 27 moves along the sliding limit block 17 and drives different injection cores 13 to move away from each other. The soft rubber product 8 after injection molding adheres to the corresponding injection molded body 18 and is connected in series on the shunt fixing rod 28. Since the ejector rod 25 loses the pressure from the movable mold 10, under the reset action of the spring 1, the push rod 5 and the injection molded body 18 move relative to the push rod fixing seat 4, and a gap is formed again between the end face of the injection molded body 18 and the corresponding end face of the push rod fixing seat 4.

[0055] At this time, gas is introduced into the fixed mold air inlet pipe 11 through an external air supply pipeline. The fixed mold air inlet pipe 11 sends the gas into the spring accommodation cavity 19 through the fixed mold air inlet channel 12. The gas in the spring accommodation cavity 19 is sent to the gap between the end face of the push rod fixing seat 4 and the end face of the injection molded body 18 through the air passage 7 in the push rod fixing seat 4.

[0056] Since this gap has been covered by the soft rubber product 8 formed by injection molding during the injection molding process, the gas entering this gap will move along the space between the soft rubber product 8 and the injection molded body 18, so that part of the gas is filled between the soft rubber product 8 and the injection molded body 18, which is convenient for the soft rubber product 8 to be separated from the injection molded body 18.

[0057] Referring to Figures 1 to 4 of the present application, the injection molded body 18 is a multi-segment smooth curve. After the gas is introduced, obvious air flow gaps can be formed at the bending vertex positions of the multi-segment smooth curve, and then the soft rubber product 8 is enlarged to a smaller size, meeting the separation conditions from the injection molded body 18.

[0058] Finally, although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quick demoulding structure for a soft plastic mold, comprising a push rod fixing seat (4), the push rod fixing seat (4) having a fixing seat inner cavity, the fixing seat inner cavity passing through the push rod fixing seat (4), the fixing seat inner cavity having an inner cavity bottom outlet and an inner cavity top outlet; characterized in that: A push rod (5) is arranged in the inner cavity of the push rod fixing seat (4), and two ends of the push rod (5) extend out from the inner cavity bottom outlet and the inner cavity top outlet respectively, and the outer wall of the push rod (5) slides in contact with the inner wall of the inner cavity of the fixing seat; one or more air channels (7) are arranged on the inner wall of the inner cavity of the fixing seat, and the two ends of the air channels (7) are respectively connected to the end faces of the push rod fixing seat (4) corresponding to the inner cavity bottom outlet and the inner cavity top outlet; the bottom end of the push rod (5) is connected to the limit block (2), and the limit block (2) is connected to the spring (1); the top end of the push rod (5) is provided with an injection molded body (18), and the connection position between the injection molded body (18) and the push rod (5) forms a step structure overlapping the end face of the inner cavity top outlet.

2. A soft plastic mold rapid demoulding structure according to claim 1, characterized in that: The connection position between the limit block (2) and the push rod (5) is fixed by a limit pin (3).

3. The rapid demoulding structure for soft plastic mold according to claim 1, characterized in that: The push rod fixing seat (4) is provided with a fixing seat bottom limiter (15) and a fixing seat top limiter (16) respectively.

4. The rapid demoulding structure for soft plastic mold according to claim 1, characterized in that: The top end surface of the injection molded body (18) has a push rod (25) protruding from the end surface.

5. A soft rubber mold equipped with the soft rubber mold rapid demoulding structure according to any one of claims 1 to 4, comprising a fixed mold (9) and a movable mold (10), wherein the fixed mold (9) is slidably connected to a movable mold guide rod (21) on the movable mold (10) through a fixed mold guide hole (26), and a movable mold linkage rod (14) is provided on the end surface of the movable mold (10) and the fixed mold (9) where the mold is closed, and the movable mold linkage rod (14) drives two injection cores (13) to approach each other during the mold closing process and form an injection cavity for a soft rubber product (8) after the mold is closed, characterized in that: An injection molding body (18) is arranged at the fixed mold (9) between the two injection molding core bodies (13). The injection molding body (18) is located in an injection molding chamber formed by the injection molding core bodies (13) after the mold is closed. The injection molding body (18) is connected to a push rod (5). The push rod (5) passes through a fixed seat limit block (20) through a push rod fixed seat (4). The fixed seat limit block (20) is located at the mold closing end face of the fixed mold (9). The push rod fixed seat (4) is fixed in the fixed seat limit block (20). After the push rod (5) passes through the push rod fixed seat (4), it extends into the spring accommodating chamber of the fixed mold (9). (19), a spring (1) is placed in the spring accommodating chamber (19), and the spring (1) is connected to the bottom end of the push rod (5) through a limit block (2) and a limit pin (3); the spring accommodating chamber (19) is connected to a fixed mold air inlet channel (12) of the fixed mold (9), and the fixed mold air inlet channel (12) is connected to a fixed mold air inlet pipe (11) at the inlet end, and the fixed mold air inlet pipe (11) is fixed on the fixed mold (9); the movable mold (10) is provided with a flow channel diverter block (23) at the mold end surface, and the flow channel diverter block (23) is connected to the injection flow channel (22) on the movable mold (10).

6. The mold according to claim 5, characterized in that: The fixed mold (9) is provided with sliding limit blocks (17) on both sides of the mold end surface. The sliding limit blocks (17) on both sides of the fixed mold (9) form slideways for the core body linkage blocks (27) to slide. The core body linkage blocks (27) are connected to the corresponding injection molding core body (13). The core body linkage blocks (27) are also processed with core body linkage holes (24) that cooperate with the movable mold linkage rod (14).

7. The mold according to claim 6, characterized in that: A limit pin (3) is provided at the connection position between the limit block (2) and the push rod (5); the push rod fixing seat (4) is connected to the fixing seat limit block (20) via a fixing seat bottom limit (15) and a fixing seat top limit (16); the bottom end of the push rod fixing seat (4) is located in the spring accommodating cavity (19); the top end of the push rod fixing seat (4) is located at the mold closing end face position of the fixed mold (9) and is covered by the injection molded core (13) after the mold closing.

8. The soft plastic mold according to claim 7, characterized in that: The fixed seat limit block (20) of the fixed mold (9) is equipped with a diverter fixed rod (28), and the top end of the diverter fixed rod (28) passes through the fixed seat limit block (20) and the injection core (13) after mold closing and then extends into the injection flow channel (22).

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