A rubber gasket embossing device

Abstract

This utility model discloses a rubber gasket embossing device, including a rectangular lower mold base and an upper mold base. Vertical guide rods are fixedly installed at the four upper corners of the lower mold base, passing through and slidably connecting to the upper mold base. A rectangular top plate is fixedly installed between the top ends of the guide rods. A rectangular heat medium cavity is provided in the mold base, used for filling with heat-conducting oil and containing an electric heating element. A cover plate for sealing the heat medium cavity is installed on the upper side of the upper mold base. Several protruding punches are screwed to the bottom of the heat medium cavity. Several mounting grooves are provided on the lower mold base, each corresponding to a screwed-on die cylinder. A sliding support plate is provided in the die cylinder, and a spring is provided at the lower part of the support plate. The heat-conducting oil is heated by the electric heating element, and the heat-conducting oil is used as the heat medium to heat each punch. During the hot pressing process, the high temperature enhances the movement of the rubber molecular chains, while the high pressure forces the molecular chains to align oriented along the molding cavity, which helps maintain the shape of the embossed gasket.

Description

Technical Field

[0001] This utility model relates to the field of rubber gasket technology, specifically to a rubber gasket embossing device. Background Technology

[0002] A rubber gasket is a ring-shaped sealing component made of rubber, typically formed by molding or injection molding. It possesses good elasticity and wear resistance. Rubber gaskets are widely used in various mechanical equipment, pipes, and pipe joints to prevent leakage of liquids, gases, and dust. They can fill gaps between joints and have a certain degree of resilience, ensuring the reliability and stability of the seal. Imprinting concentric circular patterns on rubber gaskets can improve their shock absorption and sealing performance. A search revealed Chinese invention patent CN113400633B, which discloses a rubber gasket embossing device. This device first embosses the rubber gasket, then holds it under pressure during its rebound deformation, thus disrupting the gasket's shape memory and solving the problem of the patterns fading or disappearing. However, this solution also has the following drawbacks: cold pressing of rubber materials at room temperature is not conducive to maintaining their shape memory; therefore, the embossing effect of the device is limited. Utility Model Content

[0003] The purpose of this invention is to provide a rubber gasket embossing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a rubber gasket embossing device, comprising a rectangular lower mold base and an upper mold base. Vertical guide rods are fixedly installed at the four upper corners of the lower mold base, passing through and slidably connecting to the upper mold base. A rectangular top plate is fixedly installed between the top ends of the guide rods. A rectangular heat medium cavity is provided in the mold base, used for filling with heat-conducting oil and containing an electric heating tube. A cover plate for sealing the heat medium cavity is installed on the upper side of the upper mold base. Several protruding punches are screwed to the bottom of the heat medium cavity. Each punch is a hollow rotating structure with embossed protrusions at its bottom. Several mounting slots are provided on the lower mold base, each corresponding to a screwed-on concave mold cylinder. The punches and concave mold cylinders correspond one-to-one vertically. A sliding support plate is provided in the concave mold cylinder, and a spring providing thrust is provided at the lower part of the support plate.

[0005] Preferably, a through screw is screwed into the middle of the top plate, the lower end of the screw is rotatably connected to the cover plate, and a handwheel is fixedly installed at the upper end of the screw.

[0006] Preferably, the upper end of the die cylinder is provided with a hexagonal flange, and two guide grooves are symmetrically arranged on the inner wall of the die cylinder, extending upward from the bottom of the die cylinder.

[0007] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses an electric heating tube to heat the heat-conducting oil, and uses the heat-conducting oil as a heat medium to heat each punch core. During the hot pressing process, the high temperature enhances the movement of the rubber molecular chains, and the high pressure forces the molecular chains to align in the direction along the molding cavity, which is beneficial to maintaining the shape of the gasket after embossing. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is a schematic diagram of the three-dimensional structure of the mating of the punch core and the die cylinder;

[0010] Figure 3 This is a cross-sectional view of the mating structure of the punch core and the die cylinder.

[0011] In the diagram: 1. Lower mold base; 2. Top plate; 3. Guide rod; 4. Upper mold base; 5. Lead screw; 6. Heat medium cavity; 7. Cover plate; 8. Heating tube; 9. Punch core; 10. Die cylinder; 11. Spring; 12. Support plate; 13. Embossing protrusion; 14. Handwheel. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0013] Please see Figure 1-3 This utility model provides a technical solution: a rubber gasket embossing device, including a rectangular lower mold base 1 and an upper mold base 4. Vertical guide rods 3 are fixedly installed at the four upper corners of the lower mold base 1. The guide rods 3 pass through the upper mold base 4 and are slidably connected to it. A rectangular top plate 2 is fixedly installed between the top ends of the guide rods 3. A through screw rod 5 is screwed into the middle of the top plate 2. The lower end of the screw rod 5 is rotatably connected to the cover plate 7. A handwheel 14 is fixedly installed at the upper end of the screw rod 5. By rotating the handwheel 14, the upper mold base 4 can be moved vertically.

[0014] The upper mold base 4 has a rectangular heat transfer medium cavity 6, which is used to fill heat transfer oil and contains an electric heating element 8. The electric heating element 8 is used to heat the oil to the required temperature. A temperature sensor is installed inside the heat transfer medium cavity 6 to measure the temperature of the internal heat transfer oil. A cover plate 7 is installed on the upper side of the upper mold base 4 to close the heat transfer medium cavity 6. Several punch cores 9 protruding from the bottom are screwed to the bottom of the heat transfer medium cavity 6. The punch cores 9 are hollow rotating structures with embossed protrusions 13 on the bottom. The embossed protrusions 13 are used to form embossing on the gasket. The lower mold base 1 has several mounting slots, each corresponding to a die cylinder 10 screwed to it. The punch cores 9 and die cylinders 10 are one-to-one vertically aligned, and both the punch cores 9 and die cylinders 10 are arranged in a rectangular array. The die cylinder 10 has a sliding support plate 12. A spring 11 is provided at the lower part of the support plate 12 to provide thrust. The washer to be embossed is placed on the support plate 12. The lower the punch core 9 is, the greater the compression of the spring 11, and the greater the squeezing force on the washer. The upper end of the die cylinder 10 has a hexagonal flange for clamping during screwing. Two guide grooves are symmetrically arranged on the inner wall of the die cylinder 10, extending upward from the bottom of the die cylinder 10 to a position near the upper end.

[0015] Working principle: When in use, the upper mold base 4 is lifted by rotating the handwheel 14, and the upper port of the die cylinder 10 is exposed. The gasket is placed into each die cylinder 10 accordingly. The electric heating tube 8 heats the heat transfer oil to the required temperature (the hot pressing temperature is different for different rubber materials). Then, the punch core 9 is pressed down and inserted into the die cylinder 10 along with the upper mold base 4, so that the embossed protrusion 13 at the lower end presses on the gasket, pressing the texture on the surface of the gasket.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rubber gasket embossing device, comprising a rectangular lower mold base (1) and an upper mold base (4), wherein vertical guide rods (3) are fixedly installed at the four upper corners of the lower mold base (1), the guide rods (3) pass through the upper mold base (4) and are slidably connected thereto, and a rectangular top plate (2) is fixedly installed between the top ends of the guide rods (3), characterized in that: The mold base (4) is provided with a rectangular heat medium cavity (6), which is used to fill heat transfer oil and is equipped with an electric heating tube (8). The upper mold base (4) is provided with a cover plate (7) for sealing the heat medium cavity (6). Several punch cores (9) extending from the bottom are screwed to the bottom of the heat medium cavity (6). The punch core (9) is a hollow rotating body structure and has embossed protrusions (13) at the bottom. Several mounting slots are provided on the lower mold base (1). Each mounting slot is screwed with a concave mold cylinder (10). The punch core (9) and the concave mold cylinder (10) are vertically aligned. A support plate (12) that can slide up and down is provided in the concave mold cylinder (10). A spring (11) that provides thrust to the lower part of the support plate (12) is provided.

2. A rubber gasket knurling device as defined in claim 1, wherein: A through screw rod (5) is screwed into the middle of the top plate (2). The lower end of the screw rod (5) is rotatably connected to the cover plate (7). A handwheel (14) is fixedly installed on the upper end of the screw rod (5).

3. A rubber gasket knurling device as defined in claim 1 wherein: The upper end of the die cylinder (10) is provided with a hexagonal flange, and two guide grooves are symmetrically arranged on the inner wall of the die cylinder (10), which extend upward from the bottom of the die cylinder (10).

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