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General knowledge and problems of rubber seal products

Update:20-03-2020
Summary:

There are many types and functions of rubber seals, so […]

There are many types and functions of rubber seals, so the specifications and performance of the seals are also different, but in the production process, the procedures are basically the same. Baker Seals tells you the rubber seal products made from general solid raw rubber. What are the basic daily processes? Such as plasticizing, mixing, calendering, extrusion, molding, vulcanization, these six basic procedures, of course, raw material preparation, finished product finishing, inspection and packaging and other basic process requirements.
1. So, what is the main problem of the processing process of rubber seals?
Such as the process of resolving the contradiction between plasticity and elastic properties, through various technical processes, the elastic rubber seal ring specification material is made into a plasticized plastic compound, and various compounding agents are added to make a semi-finished product. The semi-finished product with plasticity becomes a rubber seal product with high elasticity and good physical and mechanical properties.
2. What is the reason for the defective products in the film pressure process of rubber seals?
Inaccurate dimensions; insufficient amount of rubber; too much rubber, thickening of the speed side; convex and concave marks on the surface; blisters on the surface and inside of the seal due to air; impurities on the surface and inside of the seal; Edge phenomenon, processing, grinding tool structure is unreasonable; rubber has obvious inward shrinkage at the parting point; there are cracks, nicks, and delamination on the surface and inside of the seal ring.
3. What are the factors affecting the viscosity of the rubber seal material?
Rubber molecular chemical structure; the larger the molecular weight, the higher the viscosity; the molecular weight distribution; the effect of temperature on the viscosity of the rubber; the rate of the shearing process; the compressive pressure at the processing temperature; the longer the parking time, the lower the speed; Compounding agent.
4. What is the reason why the rubber seal products after cooling must be parked and matured?
Reduce rubber shrinkage; generate combined rubber to improve the effect; continue to diffuse during parking to uniformly disperse; restore fatigue to the rubber, and mechanical stress on mixing.
5. What are the process characteristics of the rubber seal material?
High elasticity; viscoelasticity; electrical insulation; compounding agent must be added; vulcanization is required, except for thermoplastic elastomers.
6. What is the physical process and mechanical performance of the rubber seal?
Tensile strength; elongation stress; tear strength; elongation; deformation; resilience; hardness.

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