Polytetrafluoroethylene lining metal mesh molding technology Its products are made of PTFE lining, metal mesh, fluoroplastic welding film (polyfluoroethylene propylene FEP or polytetrafluoroethylene-perfluoropropyl vinyl ether copolymer PFA), It is composed of glass fiber, adhesive and metal shell. The elastic mold makes full use of its elasticity to compress the PTFE powder in the cavity and tightly adhere to the lining wall. It is widely used in severely corrosive occasions such as petroleum, chemical, pesticide, dye, pharmaceutical, military industry, and pipeline system medium or material transportation.
At the same time, it overcomes the inconsistency of the curing reaction (exothermic reaction) speed during the sintering process, which leads to local stress concentration and cracks. Sintering molding process Quartz sand expansion material is used as free compensation to solve the problem of the disparity in linear expansion coefficient between the metal shell and the PTFE lining during the sintering process, and the inconsistency of thermal expansion and contraction causes the PTFE lining to separate from the metal shell. The isobaric forming technology of PTFE lining includes preforming process and sintering forming process.
The PTFE lining isobaric forming technology can be applied to the cavity forming of valves (ball valves, gate valves) with complex geometric shapes and structures, which broadens and improves the use temperature range, corrosion resistance, wear resistance and sealing reliability of similar products.. Preforming process Using elastic molds, the inner and outer walls of the lining of the workpiece cavity are under the condition of equal pressure difference.
Moreover, the thickness of the PTFE lining remains the same, which completely solves the problem of the molding technology of the cavity of the complex-shaped workpiece and PTFE BBQ Mat the problem of inconsistent lining thickness, which leads to local stress concentration and cracks. The PTFE anticorrosive products of diamond mesh metal mesh overcome and improve the technical problems of square mesh metal mesh (or other forms) The three-dimensional rotational molding technology of PTFE lining is to place high-fluidity engineering plastics in a mold to be processed, heat the workpiece, and at the same time make the mold rotate around the rotation axis and the revolution axis, so that the inner surface of the cavity of the workpiece is coated with a The uniform and seamless molten engineering plastics greatly improve the sealing performance, corrosion resistance and service life of fluorine-lined valves. 2
Tags: PTFE BBQ Mat
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