The basic method of rubber seal lamination molding_Rubber Seal_Rubber Seal Manufacturer

The basic method of rubber seal compression molding The rubber seal molding method basically includes four steps: mixing, pre-forming, sintering, and cooling. Preforming is to add the rubber seals seal powder uniformly into the mold, and pressurize it into a dense preform (i.e. blank) at room temperature; sintering is to heat the preform above the melting point, and cooling is the process of reducing the sintering temperature to room temperature . Some rubber seals seals are made by pressing once above the melting point temperature. This molding die is called a hot pressing die, and the corresponding PTFE die is called a cold pressing die. When molding rubber seals, attention should be paid to the influence of compression ratio (4-6 for PTFE) and molding shrinkage (generally 2.6-4.5% for PTFE) on the product. The raw material is preferably a suspension polymerized resin, and the soft and fine powder with a particle size of 20-500 microns is the best. During the pressing process, it is necessary to 'deflate', the pre-forming pressure is 17-35 MPa, and the holding time depends on the thickness of the blank. For example, a blank with a thickness of 100 mm should be held for 15 minutes.
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