Mould pressing mould for processing rubber and plastic sealing element

Abstract

The utility model relates to the technical field of rubber and plastic sealing element processing equipment, in particular to a mould pressing mould for processing rubber and plastic sealing elements, which comprises a base, a support is fixedly mounted on the upper side of the base, a mounting plate is fixedly connected to the upper side of the support, a pressing component is connected to the mounting plate, an upper mould is fixedly mounted on the lower side of the pressing component, and a lower mould is fixedly mounted on the lower side of the upper mould. An upper die is horizontally and slidably mounted on the upper side of the base, a lower die is horizontally and slidably mounted on the upper side of the base, the upper die and the lower die are both of hollow cuboid structures, a plurality of first-stage mounting openings are formed in the lower surface of the upper die, lower pressing blocks are slidably mounted in the first-stage mounting openings, and spring rods are arranged between the lower pressing blocks and the top wall of the upper die; a plurality of secondary mounting ports are formed in the upper surface of the lower die, pressure-bearing blocks are slidably mounted in the secondary mounting ports, and spring rods are arranged between the pressure-bearing blocks and the bottom wall of the lower die. The mold is convenient to separate from the rubber and plastic sealing element subjected to mold pressing, and the effect of convenient demolding is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber and plastic sealing component processing equipment, in particular to a compression mold for rubber and plastic sealing component processing. Background Art

[0002] Rubber and plastic seals are key components used in mechanical equipment and pipelines to prevent leakage, isolate media, and seal fluids or gases. These seals are made of rubber, plastic, or rubber-plastic composite materials, and have excellent elasticity, chemical resistance, and temperature resistance. They are widely used in the automotive, industrial equipment, aerospace, petrochemical, and other fields. When processing rubber and plastic seals, compression molds are required.

[0003] Chinese utility model patent CN220841139U discloses a rubber and plastic seal molding die, including a base, a processing block is fixedly connected to the top of the base, a limit assembly is installed on the top of the base, a gantry is fixedly connected to the outside of the base, an upper mold assembly is installed on the inner top wall of the gantry, the limit assembly includes a limit groove opened on the top of the processing block, a lower mold body is inserted into the inner side of the limit groove, the top of the lower mold body is provided with evenly distributed lower mold grooves, the top of the base is provided with an installation groove, the bottom of the installation groove is rotatably connected to a rotating rod through a bearing, and a worm gear is fixedly connected to the outside of the rotating rod. The rubber and plastic seal molding die can effectively improve the convenience of mold replacement, allowing staff to quickly and conveniently disassemble and replace the upper and lower molds, effectively improving the practicality of the rubber and plastic seal molding die.

[0004] However, the device still has some problems. The upper pressing module is driven by the upper mold body to be inserted into the inner side of the corresponding lower mold groove. After cooling and forming, the driving mechanism is started to drive the upper mold body to rise, and the rubber-plastic seal can be taken out. In actual use, the rubber has a certain adhesion. When the rubber parts are pressed down for cooling and forming and taken out, they will adhere to the mold, and a demolding tool or a demolding air gun is needed to assist in demolding, which makes the demolding operation more cumbersome and affects production efficiency. Utility Model Content

[0005] The utility model aims to provide a molding die for processing rubber and plastic sealing parts to solve the problems raised in the above-mentioned background technology.

[0006] The technical solution of the utility model is:

[0007] A molding die for processing rubber and plastic seals, comprising a base, a bracket fixedly installed on the upper side of the base, a mounting plate fixedly connected to the upper side of the bracket, a pressing assembly connected to the mounting plate, an upper mold fixedly installed on the lower side of the pressing assembly, a lower mold horizontally slidably installed on the upper side of the base, the upper mold and the lower mold are both hollow rectangular structures, a plurality of primary mounting openings are provided on the lower surface of the upper mold, a plurality of primary mounting openings are slidably installed with pressing blocks in the plurality of primary mounting openings, the pressing blocks are sealed with the primary mounting openings, a spring rod is arranged between the pressing block and the top wall of the upper mold, a plurality of secondary mounting openings are provided on the upper surface of the lower mold, a plurality of secondary mounting openings are slidably installed with pressure blocks in the plurality of secondary mounting openings, the pressure blocks are sealed with the secondary mounting openings, a circular convex block is arranged on the upper surface of the pressure block, and a spring rod is arranged between the pressure block and the bottom wall of the lower mold;

[0008] The spring rod comprises a telescopic rod and a spring, the telescopic rod comprises a rod seat and a movable rod slidably connected to the rod seat, the rod seat is fixedly arranged, the telescopic end of the movable rod is connected to a lower pressure block or a pressure bearing block, the spring is sleeved on the movable rod, one end of the spring is connected to the rod seat, and the other end is connected to the lower pressure block or the pressure bearing block;

[0009] A pneumatic component is fixedly installed on one side of the base, and the pneumatic component can respectively introduce gas into the upper mold and the lower mold to drive the lower pressure block and the pressure bearing block to stretch the spring rod respectively and slide to the outside of the primary installation port and the secondary installation port respectively.

[0010] The pneumatic assembly includes an air box, a piston is slidably installed in the air box, an air inlet and a gas outlet are respectively opened on the upper side of the air box, a primary one-way valve is fixedly installed in the air inlet, an injection unit is installed in the gas outlet, the injection unit includes a shunt pipe, the shunt pipe is fixedly installed in the gas outlet, a secondary one-way valve is installed in the shunt pipe, a lower hose and an upper hose are respectively connected to one side of the shunt pipe, the other end of the lower hose is fixedly installed on the lower mold and communicated with the lower mold, and the other end of the upper hose is fixedly installed on the upper mold and communicated with the upper mold.

[0011] An L-shaped rod is sealingly and slidably mounted on the upper side of the air box, and the bottom end of the L-shaped rod is fixedly connected to the upper side of the piston.

[0012] The pressing assembly includes a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to the upper side of the upper mold, a secondary rack is fixedly installed on one side of the upper mold, the other end of the L-shaped rod is fixedly installed on one side of the secondary rack, a primary avoidance groove is opened on the upper side of the base, the secondary rack is slidably arranged in the primary avoidance groove, a slide groove is horizontally opened on the upper side of the base, a primary rack is slidably installed in the slide groove, and the primary rack is connected to the bottom of the lower mold, a rotating groove is opened on the inner wall of the primary avoidance groove, a gear is rotatably installed in the rotating groove, the gear is respectively meshed with the secondary rack and the primary rack, and a reset unit is fixedly installed on the upper side of the primary rack.

[0013] The reset unit includes a slider, which is fixedly installed on the upper side of the primary rack, a sliding groove is provided on the lower side of the lower mold, a sliding rod is fixedly installed on the inner wall of the sliding groove, the slider is slidably installed on the surface of the sliding rod, two reset springs are sleeved and installed on the surface of the sliding rod, and the two reset springs are respectively arranged at both ends of the slider, two stabilizing blocks are fixedly installed on the lower side of the lower mold, and two stabilizing grooves are provided on the upper side of the base, the two stabilizing blocks are correspondingly slidably installed in the two stabilizing grooves, and limit blocks are fixedly installed in the two stabilizing grooves.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the utility model, the upper mold is driven downward by the output end of the hydraulic cylinder to gradually approach the lower mold, and the raw material in the lower mold is molded. In the process of the upper mold moving downward, the secondary rack is driven to move downward, the secondary rack drives the L-shaped rod to move downward, and the L-shaped rod drives the piston to move downward, and the external gas is sucked into the air box through the primary one-way valve at the air inlet. When the molding is completed, the output end of the hydraulic cylinder drives the upper mold to move upward, and the upper mold drives the secondary rack to reset. While the secondary rack is reset, the piston is driven upward by the L-shaped rod to squeeze the air sucked in the air box. At this time, the air begins to be transported to the lower hose and the upper hose through the shunt pipe, and is respectively transported to the lower mold and the upper mold. When the air is transported to the lower mold, the pressure block of the lower mold is subjected to the pressure of the internal gas, and begins to move upward to push out the molded rubber and plastic seal and use the ejected air pressure to perform secondary demolding on it. When the air is transported to the upper mold, the lower pressing block of the upper mold is subjected to the pressure of the internal gas and moves downward, which is convenient for separation from the molded rubber and plastic seal, thereby achieving the effect of demolding it.

[0016] 2. In the utility model, the upper die is driven downward by the output end of the hydraulic cylinder to gradually approach the lower die. In the process of the upper die moving downward, the secondary rack is driven downward, the secondary rack drives the gear to rotate, the gear drives the primary rack to move, the primary rack drives the slider to move, and the slider drives the lower die to move into the base and gradually align with the upper die through the action of two return springs. When the upper and lower dies are aligned, the upper die continues to move downward. At this time, the lower die is stopped by the limiting action of the limit block and begins to squeeze and stretch the two return springs respectively until the upper die is completely molded with the lower die. When the molding is completed, the output end of the hydraulic cylinder is pulled upward, driving the upper die to stretch upward, and the upper die drives the secondary rack to reset. At this time, the lower die is first reset by the two return springs, and as the upper die continues to rise, it begins to move away from the base at the same time, thereby achieving the effect of facilitating loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the partial cutaway structure of the utility model. Figure 1 ;

[0020] Figure 3 This is a partial structural diagram of the utility model. Figure 1 ;

[0021] Figure 4 This is a partial structural diagram of the utility model. Figure 2 ;

[0022] Figure 5 This is a partial structural diagram of the utility model. Figure 3 ;

[0023] Figure 6 This is a schematic diagram of the partial cutaway structure of the utility model. Figure 2 ;

[0024] Figure 7 yes Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0025] Description of reference numerals:

[0026] 1. Base; 2. Bracket; 3. Hydraulic cylinder; 4. Upper die; 5. Lower die; 6. Primary rack; 7. Gear; 8. Secondary rack; 9. Mounting plate; 10. Pressure block; 11. Spring rod; 111. Telescopic rod; 112. Spring; 12. Lower pressure block; 13. Air box; 14. Piston; 15. L-shaped rod; 16. Primary one-way valve; 17. Diverter pipe; 18. Lower hose; 19. Upper hose; 20. Slider; 21. Sliding rod; 22. Return spring; 23. Limit block; 24. Stabilizer. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0028] Figure 1 to Figure 7 It is the best embodiment of the utility model, and the following Figure 1 ~Attached Figure 7 The utility model is further described.

[0029] like Figure 1 to Figure 7 As shown, a molding die for processing rubber and plastic seals comprises a base 1, a bracket 2 is fixedly mounted on the upper side of the base 1, a mounting plate 9 is fixedly connected to the upper side of the bracket 2, a pressing assembly is connected to the mounting plate 9, an upper mold 4 is fixedly mounted on the lower side of the pressing assembly, a lower mold 5 is horizontally slidably mounted on the upper side of the base 1, both the upper mold 4 and the lower mold 5 are hollow rectangular structures, a plurality of primary mounting openings are provided on the lower surface of the upper mold 4, a plurality of primary mounting openings are slidably mounted with pressing blocks 12 in the plurality of primary mounting openings, the pressing blocks 12 are sealingly matched with the primary mounting openings, a spring rod 11 is arranged between the pressing block 12 and the top wall of the upper mold 4, a plurality of secondary mounting openings are provided on the upper surface of the lower mold 5, a plurality of secondary mounting openings are slidably mounted with pressure blocks 10 in the plurality of secondary mounting openings, the pressure blocks 10 are sealingly matched with the secondary mounting openings, and a circular protrusion is arranged on the upper surface of the pressure blocks 10. The lower pressing block 12 protrudes from the lower side of the upper mold 4 and cooperates with the lower mold 5 for molding. The pressure block 10 is recessed in the secondary installation opening and cooperates with the lower pressing block 12 to extrude the rubber and plastic material to form a sealing ring.

[0030] The size, quantity and arrangement of the primary and secondary mounting openings of the upper die 4 and the lower die 5 are corresponding to each other, so as to ensure that multiple products can be molded out at the same time.

[0031] A spring rod 11 is arranged between the pressure block 10 and the bottom wall of the lower mold 5, and the spring rod 11 includes a telescopic rod 111 and a spring 112. The telescopic rod 111 includes a rod seat and a movable rod slidably connected to the rod seat. The rod seat is fixedly arranged, and the telescopic end of the movable rod is connected to the lower pressure block 12 or the pressure block 10. The spring 112 is sleeved on the movable rod, and one end of the spring 112 is connected to the rod seat, and the other end is connected to the lower pressure block 12 or the pressure block 10.

[0032] Under normal conditions, the spring rod 11 connected to the top wall of the upper mold 4, the movable rod of the telescopic rod 111 of which is retracted in the rod seat, and the spring 112 thereof relies on the tensioning force to overcome the gravity of the lower pressing block 12 to keep the positions of the lower pressing block 12 and the movable rod unchanged. At this time, the telescopic rod 111 has reached the maximum tightening state, ensuring that the lower pressing block 12 will not move upwards during molding, thereby ensuring the stability during molding;

[0033] Under normal conditions, the spring rod 11 connected to the bottom wall of the lower mold 5, the movable rod of its telescopic rod 111 is retracted in the rod seat, and its spring 112 is in a normal state. The telescopic rod 111 is retracted to the maximum position. During molding, the pressure block 10 will not move.

[0034] A pneumatic component is fixedly installed on one side of the base 1. After the molding is completed, the pneumatic component can respectively introduce gas into the upper mold 4 and the lower mold 5, drive the lower pressing block 12 and the pressure block 10 to respectively stretch the spring rod 11, and slide to the outside of the primary installation port and the secondary installation port respectively, so as to facilitate demolding.

[0035] Specifically, the pneumatic assembly includes an air box 13, in which a piston 14 is slidably installed, and an air inlet and a gas outlet are respectively opened on the upper side of the air box 13, a primary one-way valve 16 is fixedly installed in the air inlet, and an injection unit is installed in the gas outlet, and the injection unit includes a diverter pipe 17, which is fixedly installed in the gas outlet, and a secondary one-way valve is installed in the diverter pipe 17, and one side of the diverter pipe 17 is respectively connected to a lower hose 18 and an upper hose 19, the other end of the lower hose 18 is fixedly installed on the lower mold 5 and communicated with the lower mold 5, and the other end of the upper hose 19 is fixedly installed on the upper mold 4 and communicated with the upper mold 4.

[0036] The primary one-way valve 16 installed at the air inlet on the upper side of the air box 13 has an air flow direction from the outside to the air box 13. The secondary one-way valve installed in the diverter pipe 17 has an air flow direction from the air box 13 to the lower hose 18 and the upper hose 19. The lower hose 18 and the upper hose 19 can be used to inject air into the lower mold 5 and the upper mold 4 respectively, providing power for driving the lower pressure block 12 and the pressure block 10.

[0037] An L-shaped rod 15 is sealingly and slidably mounted on the upper side of the air box 13 , and the bottom end of the L-shaped rod 15 is fixedly connected to the upper side of the piston 14 .

[0038] The pressing assembly includes a hydraulic cylinder 3, the output end of the hydraulic cylinder 3 is fixedly connected to the upper side of the upper mold 4, a secondary rack 8 is fixedly installed on one side of the upper mold 4, the other end of the L-shaped rod 15 is fixedly installed on one side of the secondary rack 8, a primary avoidance groove is opened on the upper side of the base 1, and the secondary rack 8 is slidably set in the primary avoidance groove, a slide groove is horizontally opened on the upper side of the base 1, a primary rack 6 is slidably installed in the slide groove, and the primary rack 6 is connected to the bottom of the lower mold 5, a rotating groove is opened on the inner wall of the primary avoidance groove, a gear 7 is rotatably installed in the rotating groove, the gear 7 is respectively meshed with the secondary rack 8 and the primary rack 6, and a reset unit is fixedly installed on the upper side of the primary rack 6.

[0039] In the above structure, the hydraulic cylinder 3 is the existing technology, which is a complete hydraulic system, and can complete the hydraulic lifting of the upper mold 4. It will not be elaborated here. When the secondary rack 8 moves, it can cooperate with the L-shaped rod 15 to provide lifting power for the piston 14. The slide groove runs through the upper side of the base 1 to prevent the primary rack 6 from moving limited. When the secondary rack 8 moves downward, it will drive the gear 7 to rotate counterclockwise, and the gear 7 will drive the primary rack 6 to move and transport the lower mold 5 through the slider 20.

[0040] The reset unit includes a slider 20, which is fixedly installed on the upper side of the primary rack 6. A sliding groove is provided on the lower side of the lower mold 5. A sliding rod 21 is fixedly installed on the inner wall of the sliding groove. The slider 20 is slidably installed on the surface of the sliding rod 21. Two reset springs 22 are sleeved and installed on the surface of the sliding rod 21. The two reset springs 22 are respectively arranged at both ends of the slider 20. Two stabilizing blocks 24 are fixedly installed on the lower side of the lower mold 5. Two stabilizing grooves are provided on the upper side of the base 1. The two stabilizing blocks 24 are correspondingly slidably installed in the two stabilizing grooves. Limiting blocks 23 are fixedly installed in the two stabilizing grooves.

[0041] In the above structure, two return springs 22 are installed on the surface of the slide bar 21, which are convenient for stable and fast resetting of the slider 20. By installing the slider 20, the slide bar 21 and the two return springs 22, the upper mold 4 can be continuously lowered while the lower mold 5 is stabilized in the pressing area of ​​the upper mold 4, thereby ensuring the accuracy during mold closing and the molding quality of the rubber-plastic seal. The two stabilizing blocks 24 slide in the stabilizing groove, which can improve the movement stability of the lower mold 5. At the same time, the two limit blocks 23 in the stabilizing groove can also limit the stabilizing blocks 24, thereby limiting the lower mold 5.

[0042] The working principle of the utility model is as follows: first, the rubber and plastic materials to be molded are placed in the secondary installation opening on the lower mold 5 in sequence, and after the placement is completed, the hydraulic cylinder 3 is started, and the output end of the hydraulic cylinder 3 drives the upper mold 4 to move downward so that it gradually approaches the lower mold 5. During the downward movement of the upper mold 4, the secondary rack 8 is driven to move downward, and the secondary rack 8 drives the L-shaped rod 15 to move downward, and the L-shaped rod 15 drives the piston 14 to move downward, and the external gas is sucked into the air box 13 through the primary one-way valve 16 at the air inlet, and the secondary rack 8 drives the gear 7 to rotate, and the gear 7 drives a The first rack 6 moves, and the first rack 6 drives the slider 20 to move, driving the lower mold 5 to move into the base 1 and gradually align with the upper mold 4. The upper mold 4 continues to move downward. At this time, the lower mold 5 drives the two stabilizing blocks 24 to slide in the stabilizing groove. When one side of the stabilizing block 24 is attached to one side of the limiting block 23, it is limited, so that the lower mold 5 stops. The lower mold 5 is aligned with the upper mold 4 in a vertical position. The slider 20 starts to squeeze and stretch the two return springs 22 respectively until the upper mold 4 is completely molded with the lower mold 5, and the rubber and plastic material in the lower mold 5 is molded by the mold closing;

[0043] After complete cooling and shaping, the output end of the hydraulic cylinder 3 is pulled upward, driving the upper mold 4 to move upward, and the upper mold 4 drives the secondary rack 8 to reset. At this time, the lower mold 5 is reset by the slider 20 and the two reset springs 22. As the upper mold 4 continues to rise, the secondary rack 8 resets while driving the piston 14 to move upward through the L-shaped rod 15, squeezing the air sucked into the air box 13. At this time, the air begins to be transported to the lower hose 18 and the upper hose 19 through the shunt pipe 17, and is respectively transported to the lower mold 5 and the upper mold 4. When it is transported to the lower mold 5, the pressure block 10 of the lower mold 5 is subjected to the pressure of the internal gas, and begins to stretch the corresponding spring rod 11 to move upward, ejecting the molded rubber and plastic seal and making The mold is demoulded for the second time by using the air pressure ejected. When the air in the shunt pipe 17 is transported to the upper mold 4, the lower pressing block 12 of the upper mold 4 is subjected to the pressure of the internal gas and begins to stretch the corresponding spring rod 11 downward, so that the rubber-plastic seal that may adhere to the surface of the lower pressing block 12 after molding is demoulded by using the air pressure ejected. In addition, even if the rubber-plastic seal is not adhered to the lower pressing block 12, the action of the lower pressing block 12 facilitates the loosening of the rubber-plastic seal, thereby achieving the effect of demoulding. When the air in the air box 13 is exhausted, the gas pressure in the upper mold 4 and the lower mold 5 disappears, and the lower pressing block 12 and the pressure block 10 are reset respectively by the spring 112 of the spring rod 11, so as to facilitate the next use.

Claims

1. A molding die for processing rubber and plastic seals, comprising a base (1), characterized in that: A bracket (2) is fixedly mounted on the upper side of the base (1), a mounting plate (9) is fixedly connected to the upper side of the bracket (2), a pressing assembly is connected to the mounting plate (9), an upper mold (4) is fixedly mounted on the lower side of the pressing assembly, a lower mold (5) is horizontally slidably mounted on the upper side of the base (1), both the upper mold (4) and the lower mold (5) are hollow rectangular parallelepiped structures, a plurality of first-level mounting openings are opened on the lower surface of the upper mold (4), and a plurality of first-level mounting openings are slidably mounted with a lower mold (5). A pressure block (12), the lower pressure block (12) is in sealing cooperation with the primary installation opening, a spring rod (11) is arranged between the lower pressure block (12) and the top wall of the upper mold (4), a plurality of secondary installation openings are provided on the upper surface of the lower mold (5), a pressure block (10) is slidably installed in each of the plurality of secondary installation openings, the pressure block (10) is in sealing cooperation with the secondary installation openings, a circular convex block is arranged on the upper surface of the pressure block (10), and a spring rod (11) is arranged between the pressure block (10) and the bottom wall of the lower mold (5); The spring rod (11) comprises a telescopic rod (111) and a spring (112); the telescopic rod (111) comprises a rod seat and a movable rod slidably connected to the rod seat; the rod seat is fixedly arranged; the telescopic end of the movable rod is connected to a lower pressure block (12) or a pressure block (10); the spring (112) is sleeved on the movable rod; one end of the spring (112) is connected to the rod seat, and the other end is connected to the lower pressure block (12) or the pressure block (10); A pneumatic assembly is fixedly mounted on one side of the base (1), and the pneumatic assembly can respectively introduce gas into the interior of the upper mold (4) and the lower mold (5), thereby driving the lower pressing block (12) and the pressure bearing block (10) to respectively stretch the spring rod (11) and slide toward the outside of the primary installation opening and the secondary installation opening.

2. The molding die for processing rubber and plastic seals according to claim 1, characterized in that: The pneumatic assembly comprises an air box (13), a piston (14) is slidably mounted in the air box (13), an air inlet and an air delivery port are respectively opened on the upper side of the air box (13), a primary check valve (16) is fixedly mounted in the air inlet, an air injection unit is installed in the air delivery port, the air injection unit comprises a shunt pipe (17), the shunt pipe (17) is fixedly mounted in the air delivery port, a secondary check valve is installed in the shunt pipe (17), one side of the shunt pipe (17) is respectively connected to a lower hose (18) and an upper hose (19), the other end of the lower hose (18) is fixedly mounted on the lower mold (5) and communicated with the lower mold (5), and the other end of the upper hose (19) is fixedly mounted on the upper mold (4) and communicated with the upper mold (4).

3. The molding die for processing rubber and plastic seals according to claim 2, characterized in that: An L-shaped rod (15) is sealingly and slidably mounted on the upper side of the air box (13), and the bottom end of the L-shaped rod (15) is fixedly connected to the upper side of the piston (14).

4. The molding die for processing rubber and plastic seals according to claim 3, characterized in that: The pressing assembly comprises a hydraulic cylinder (3), the output end of the hydraulic cylinder (3) is fixedly connected to the upper side of the upper die (4), a secondary rack (8) is fixedly mounted on one side of the upper die (4), the other end of the L-shaped rod (15) is fixedly mounted on one side of the secondary rack (8), a primary avoidance groove is provided on the upper side of the base (1), the secondary rack (8) is slidably arranged in the primary avoidance groove, a sliding groove is horizontally provided on the upper side of the base (1), a primary rack (6) is slidably mounted in the sliding groove, the primary rack (6) is connected to the bottom of the lower die (5), a rotating groove is provided on the inner wall of the primary avoidance groove, a gear (7) is rotatably mounted in the rotating groove, the gear (7) is respectively meshed with the secondary rack (8) and the primary rack (6), and a reset unit is fixedly mounted on the upper side of the primary rack (6).

5. The molding die for processing rubber and plastic seals according to claim 4, characterized in that: The reset unit comprises a slider (20), the slider (20) being fixedly mounted on the upper side of the primary rack (6), the lower side of the lower die (5) being provided with a sliding groove, the inner wall of the sliding groove being fixedly mounted with a sliding rod (21), the slider (20) being slidably mounted on the surface of the sliding rod (21), the surface of the sliding rod (21) being sleeved with two reset springs (22), the two reset springs (22) being respectively arranged at two ends of the slider (20), the lower side of the lower die (5) being fixedly mounted with two stabilizing blocks (24), the upper side of the base (1) being provided with two stabilizing grooves, the two stabilizing blocks (24) being correspondingly slidably mounted in the two stabilizing grooves, and the two stabilizing grooves being fixedly mounted with limit blocks (23).

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