The speed of the mixing machine should not be too high

Take mixing uniformity as the standard. The pressure is 1. The PTFE resin powder should be taken as needed.3 Process three: maturation In order to disperse the extrusion aid to the surface of the powder particles more fully, the mixture must be sealed and allowed to stand at room temperature (23°C or higher) for 5-15 hours to ensure that the additives fully infiltrate the material, which is beneficial to the resin during processing.

Process 1: Screening and measurement Dispersed PTFE resin for paste extrusion is easy to cause fibrosis under shear pressure, so avoid using all instruments that cause fibrosis.4 Process four: pre-compression The purpose of pre-pressing is to remove the air in the powder that is accompanied by the squeezing auxiliary agent, and to press the paste resin into a blank corresponding to the barrel of the wire pusher, the diameter of which is about 1 PTFE BBQ Grill Mats to 2 mm smaller than the barrel.0～3.0Mpa. 2. It is proved that the pre-forming pressure is too large or too small, which will cause the insulation outer diameter to not meet the process requirements. 

During the screening process, care should be taken not to stain the powder, so as to avoid stains in the final product and reduce the electrical characteristics. The speed of the mixing machine should not be too high, otherwise the material will be attached to the inside of the cylinder wall.2 Process two: mixing Add booster according to process requirements, add coloring agent if there is color requirement. When moving the PTFE resin powder in the silo, handle it gently to avoid violent vibration to prevent the powder from agglomerating. The homogenization. 

Process flow chart 2. For rough pieces that have not been sieved, they should be placed in a clean, airtight, transparent plastic bag, and 1/3 filled.. Pour the polytetrafluoroethylene resin powder into the sieving machine (the mesh number of the sieve is 12).1. At the same time, due to the strong electrostatic attraction of fluoroplastics, attention should be paid to prevent dust intrusion. Then seal it with a lid, and close the lid tightly to prevent the squeezing aid from evaporating. Tie the mouth and vibrate gently to crush the coarse pieces into powder, and then sieve. 

Process Put the mixing barrel on the mixing machine for mixing, the general mixing time is 20min, and the speed of the mixing machine is r/min. Add the mixture into the pre-compression cavity and pressurize it until its volume is 1/3 of the initial volume. After the material is screened full 2/3 of the mixing barrel, stop the sieving, and weigh the mixing barrel on the electronic scale. The pressure on the pressure gauge increases as the radial size of the blank increases.