Telfon stud bolts contain Teflon coating, the English name is TEFLON, because of the pronunciation, it is usually called Teflon, Teflon, Teflon, Teflon, Teflon, etc. (all of them are TEFLON Transliteration). It can be divided into four types: PTFE, FEP, PFA, and ETFE. PTFE (polytetrafluoroethylene) non-stick coating can be used continuously at a high temperature of 260°C, and the maximum use temperature can reach 290-300°C. It has very low friction coefficient, good wear resistance and excellent chemical stability.
If it is used in a mold, two points are mainly considered: 1. The linear expansion coefficient of Teflon (PTFE) is 10-20 times that of steel, which is larger than most plastics, and its linear expansion coefficient changes with temperature. Very irregular changes. In the application of PTFE, if insufficient attention is paid to this aspect, it is easy to cause losses. Bolt industry: anti-corrosion, anti-salt water, weather resistance, wear-resistant lubrication.
Generally speaking, PTFE (Teflon) products are cold-pressed and hot-molded. First, they need to be pressed. The raw materials are poured into the mold of the molding press to press. The time and pressure vary according to the product; then, it is sintered and placed. High-temperature heating is carried out in the sintering furnace, the time and temperature vary according to the product, and then the required parts are removed with a lathe.
Teflon (PTFE) refers to the plastic deformation (creep) of material products under long-term continuous load, which brings certain restrictions to its application. For example, when PTFE is used as a gasket, the bolts are tightened very tightly for a tight seal, so that when a specific compression stress is exceeded, the gasket will produce "cold flow" (creep) and be crushed. These shortcomings can be overcome by adding appropriate fillers and improving the structure of parts.How to tighten Telfon stud bolts to protect the layer: The most important thing is not to frequently disassemble and bump, so that the overall coating is not damaged.
Ningbo Zhenghai Yongding Fastener Manufacturing Co., Ltd. is one of the bolts factories. If you want to buy good Telfon stud bolts, go to this company.