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CN-121975326-A - High-elasticity silica gel precision sealing piece and production process thereof

CN121975326ACN 121975326 ACN121975326 ACN 121975326ACN-121975326-A

Abstract

The invention discloses a high-elasticity silica gel precision sealing element and a production process thereof, and relates to the field of sealing elements. The invention relates to a high-elasticity silica gel precise sealing piece, which comprises a sealing rubber strip, wherein the sealing rubber strip is integrally molded through injection molding of an injection molding machine, and mainly comprises the following components of 95-105 parts of methyl vinyl silicone rubber, 1.2 parts of dicumyl peroxide, 14-16 parts of nano calcium carbonate, 8 parts of polyether polyol, 3 parts of hydroxyl silicone oil and 0.5 part of anti-aging agent RD.

Inventors

  • SU ZHIGUANG
  • ZHANG FENGYI

Assignees

  • 优普(南通)精密科技有限公司

Dates

Publication Date
20260505
Application Date
20260203

Claims (10)

  1. 1. A highly elastic silicone precision seal, comprising: the sealing rubber strip (203), wherein the sealing rubber strip (203) is integrally formed by injection molding through an injection molding machine; The anti-aging agent comprises, by weight, 95-105 parts of methyl vinyl silicone rubber, 1.2 parts of dicumyl peroxide, 14-16 parts of nano calcium carbonate, 8 parts of polyether polyol, 3 parts of hydroxyl silicone oil and 0.5 part of anti-aging agent RD.
  2. 2. A process for producing a high-elasticity silica gel precision sealing member, which is used for producing the high-elasticity silica gel precision sealing member in claim 1, and is characterized by mainly comprising the following operation steps: step one, mixing, namely weighing 100 parts of methyl vinyl silicone rubber, 1.2 parts of dicumyl peroxide, 15 parts of nano calcium carbonate, 8 parts of polyether polyol, 3 parts of hydroxyl silicone oil and 0.5 part of anti-aging agent RD; mixing raw rubber in an internal mixer at normal temperature, and adding other components for continuous mixing to obtain a mixed rubber; Step two, molding, namely controlling the temperature of a material cylinder of the silica gel injection molding machine in three sections, and demolding to obtain a sealing rubber strip (203); Step three, vulcanization, namely performing primary vulcanization and secondary vulcanization, and cooling to room temperature after the vulcanization is completed; Step four, post-treatment, namely trimming by ultraviolet laser; And fifthly, detecting the air tightness of the sealing rubber strip (203) through a detection table (1), warehousing if the sealing rubber strip is detected to be qualified, marking the defect if the sealing rubber strip is unqualified, and cleaning the equipment after discharging residual liquid.
  3. 3. The production process of the high-elasticity silica gel precise sealing piece according to claim 2, wherein a shell (201) is detachably installed on the detection table (1), a cover plate (202) is installed on the shell (201), placing grooves are formed in the shell (201) and the cover plate (202), the placing grooves are used for placing sealing rubber strips (203), a convex groove is formed in the cover plate (202), the groove is communicated with the placing grooves, a flexible sealing filling layer (204) is installed in the groove, and the bottom of the flexible sealing filling layer (204) is larger than the sealing rubber strips (203) and is used for sealing the groove.
  4. 4. A process for producing a high-elasticity silica gel precise sealing member according to claim 3, characterized in that an equipment cavity (101) is arranged in the detection table (1), a connecting pipe (105) communicated with the shell (201) is arranged in the equipment cavity (101), a water tank (102), a water pump (103) and an air pump (104) are arranged in the equipment cavity (101), the water pump (103) is communicated with the water tank (102), the output ends of the water pump (103) and the air pump (104) are communicated with the connecting pipe (105), and gas and liquid are injected into the shell (201) through the water pump (103) and the air pump (104), so that the sealing performance of the sealing rubber strip (203) is detected.
  5. 5. The process for producing the high-elasticity silica gel precision seal member according to claim 4, wherein the cover plate (202) is internally provided with a pressure sensor (205) for monitoring the pressure change in the housing (201).
  6. 6. The process for producing the high-elasticity silica gel precise sealing element according to claim 5, wherein the detecting table (1) is provided with a mounting plate (501), the mounting plate (501) is provided with a plurality of groups of miniature telescopic cylinders (502), the miniature telescopic cylinders (502) are arranged to be consistent with the shape of the sealing rubber strips (203), the telescopic ends of the miniature telescopic cylinders (502) are fixedly connected with extrusion pressure sensors (503), the extrusion pressure sensors (503) are abutted against the flexible sealing filling layers (204) and are used for extruding the flexible sealing filling layers (204), so that the flexible sealing filling layers (204) deform, the sealing rubber strips (203) in the grooves below are extruded, and the extrusion force of the flexible sealing filling layers (204) on the sealing rubber strips (203) is changed.
  7. 7. The process for producing the high-elasticity silica gel precise sealing element according to claim 6, wherein the detecting table (1) is fixedly connected with a lifting telescopic rod (301), a lifting table (302) is fixedly connected to a telescopic end of the lifting telescopic rod (301), a overlooking camera (303) is mounted on the lifting table (302), and the overlooking camera (303) is used for monitoring the shell (201) in a overlooking mode.
  8. 8. The process for producing the high-elasticity silica gel precise sealing member according to claim 7, wherein a plurality of groups of monitoring cameras (4) are installed on the detection table (1), and the monitoring cameras (4) are used for monitoring the shell (201) through the side surfaces.
  9. 9. The process for producing the high-elasticity silica gel precise sealing member according to claim 7, wherein the lifting table (302) is fixedly connected with a connecting rod (305), and the other end of the connecting rod (305) is fixedly connected with the mounting plate (501).
  10. 10. The process for producing the high-elasticity silica gel precision seal member according to claim 4, wherein a sealing plug (106) is detachably installed at the bottom of the connecting pipe (105) for discharging the liquid remaining in the connecting pipe (105).

Description

High-elasticity silica gel precision sealing piece and production process thereof Technical Field The invention belongs to the technical field of sealing elements, and particularly relates to a high-elasticity silica gel precision sealing element and a production process thereof. Background With the rapid development of the new energy automobile industry, the performance requirements of the battery pack liquid cooling channel on the sealing rubber strip are increasingly severe, so that the battery pack liquid cooling channel not only needs to have high elasticity, ageing resistance and accurate dimensional accuracy, but also needs to keep excellent air tightness under dynamic pressure working conditions, and the battery safety, especially the customized special-shaped sealing piece, is prevented from being influenced by leakage of cooling liquid. On the one hand, the injection molding process parameter is controlled widely, the material temperature, pressure and pressure maintaining parameter are set according to experiences, the density of the adhesive tape is uneven, hidden holes are easily formed at the joint of the reinforcing ribs and the main body, and the adhesive tape is difficult to find through conventional detection after molding, on the other hand, the air tightness detection link is poor in suitability, the conventional detection is carried out by adopting a uniform pressure extrusion mode, the stress difference of different areas (such as a core stress area, an edge transition area and a reinforcing rib joint area) of an injection molding integrated adhesive tape in actual installation cannot be simulated, the detection gear is fixed, the complex structural measuring points of the injection molding adhesive tape are difficult to be covered on the whole, and hidden leakage defects are easy to judge. Therefore, the development of the high-elasticity silica gel precise sealing piece and the production process which are high in adaptability, accurate and comprehensive in detection and capable of simulating actual working conditions becomes a problem to be solved in industry. Disclosure of Invention The technical problem underlying the present invention is to overcome the disadvantages of the prior art by providing a seal which overcomes or at least partially solves the above-mentioned problems. In order to solve the technical problems, the basic conception of the technical scheme adopted by the invention is that the high-elasticity silica gel precision sealing piece comprises: The sealing rubber strip is integrally formed by injection molding of an injection molding machine; The anti-aging agent comprises, by weight, 95-105 parts of methyl vinyl silicone rubber, 1.2 parts of dicumyl peroxide, 14-16 parts of nano calcium carbonate, 8 parts of polyether polyol, 3 parts of hydroxyl silicone oil and 0.5 part of anti-aging agent RD. A production process of a high-elasticity silica gel precise sealing piece is used for producing the high-elasticity silica gel precise sealing piece and mainly comprises the following operation steps: Firstly, mixing 100 parts of methyl vinyl silicone rubber, 1.2 parts of dicumyl peroxide, 15 parts of nano calcium carbonate, 8 parts of polyether polyol, 3 parts of hydroxyl silicone oil and 0.5 part of antioxidant RD, wherein raw rubber is firstly put into an internal mixer to be mixed for 5min at the normal temperature of 30r/min, the rest of components are added to be mixed for 10min, the temperature is kept at 80 ℃ to be mixed for 8min, the mixture is exhausted, and the mixture is parked at the room temperature for 2h to obtain a mixed rubber; step two, molding, namely controlling the temperature of a charging barrel of a silica gel injection molding machine in three sections, preheating a mold at 110 ℃, maintaining the injection pressure at 8MPa and the pressure for 5MPa/8min, performing vacuum auxiliary molding, and demolding at 60 ℃ to obtain a sealing rubber strip; Step three, vulcanizing, namely performing primary vulcanization at 160 ℃ for 12min, performing secondary vulcanization at 200 ℃ for 4h after cooling to 120 ℃, and cooling to room temperature along with a box; Step four, post-treatment, namely trimming by ultraviolet laser, drying for 2 hours at 50 ℃ and 50% RH, and carrying out dust-free cooling to obtain a primary detection size and a sealing surface; step five, detecting, namely assembling a shell and an adhesive tape on a detection platform, pressurizing and extruding a filling layer by a miniature telescopic cylinder, injecting air, injecting a gas-liquid mixture, monitoring a camera and a pressure sensor in a linkage manner, warehousing qualified and unqualified marking defects, and cleaning equipment after discharging residual liquid. Further, the detachable shell that installs on the detection platform, install the apron on the shell, all be provided with the standing groove on casing and the apron, the standing groove is used for placing joint str