![]() ![]() When the melting point of PEEK is reduced to 343 ° C, the PEEK that should be in the molten stage will be It will rapidly solidify and become cold material. The polymer in the molten state is brought into contact with the mold with a lower temperature during production, and the temperature of the front part in the molten state will decrease rapidly due to heat transfer. Mold cold wells were not specified or removed during production. There are two main reasons for the cold material problem: The gate marks are removed by machining after molding to ensure that the front surface is flat and the thickness size meets the design requirements. Appearance defects were analyzed from the aspects of man, machine, material, method and environment, and corresponding measures were taken, and good results were obtained. In the molding process of this product, the main difficulty is that the product has appearance defects, including cold material, silver streaks, pores and weld marks, etc., and there are gate marks in the front and middle feed. Product diameter 110mm, thickness 15mm, with M6×1 steel inserts. Pictured below is a black PEEK with insert valve part, injection molded using Victrex PEEK 450G. The author takes an aviation cabin adjustment and environmental control valve part as an example, and discusses the defects and process optimization of PEEK injection molding process.īelow is an example of analysis of forming defects of PEEK product. ![]() However, PEEK injection molded parts also have various defects, including cold spots, silver streaks, pores, weld lines, warpage, etc. PEEK material has extremely high performance in many aspects, and its injection molding parts also have great development prospects. After molding, the screw should be quickly cleaned with PE wax, and the PEEK material should not be allowed to stay in the screw. When setting the screw speed, the speed should not be too fast, and the injection pressure should be 100 ~130MPa injection speed 40~80. The molding temperature of this material is too high, and the damage to the screw is serious. The molding temperature of PEEK is 320 degrees ~ 390 degrees, the baking temperature is 160~1855H~8H, and the mold temperature is 140~180. PEEK resins can also withstand up to 3000 cycles of autoclaving at 134☌, a feature that makes them useful in the production of sterilization-critical, reusable surgical and dental equipment. ![]() and air conditioning systems are widely used. made of PEEK resin are used in the transmission and braking of automobiles. As a raw material for the manufacture of engine inner covers, various parts such as bearings, gaskets, seals, clutch gear rings, etc. In the automotive industry, PEEK resin has good friction resistance and mechanical properties. PEEK resin was first used in the aerospace field, replacing aluminum and other metal materials to manufacture various aircraft parts. PEEK has the advantages of high mechanical strength, high temperature resistance, impact resistance, flame retardant, acid and alkali resistance, hard texture, long service life, etc., and has a large number of applications in the automotive industry, aerospace, medical equipment and other fields. Polyetheretherketone (PEEK) is a high polymer composed of repeating units containing one ketone bond and two ether bonds in the main chain structure, and is a special engineering plastic. Due to the relatively high price of PEEK material, it is relatively difficult to form, and it has become one of the areas that many injection molding companies focus on. It can be manufactured and processed into various mechanical parts, such as automobile gears, oil screens, shift start disk Aircraft engine parts, automatic washing machine runners, medical equipment parts, etc. PEEK polyetheretherketone is a special engineering plastic with excellent properties such as high temperature resistance, self-lubrication, easy processing and high mechanical strength. Today we want to have a simply talking of PEEK material. ![]()
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