Method for processing special-shaped PTFE supporting piece for filter

Abstract

A method for processing a special-shaped PTFE supporting piece for a filter comprises the following processing steps of 1) weighing, wherein powdery or granulous PTFE resin materials of piece weight of a product are weighed; 2) rough pressing, wherein the weighed PTFE resin materials are added to a rough pressing mould cavity for mould pressing, the pressure of the mould pressing is 2-5Kg, pressure is kept for 3-5 seconds, and the rough pressing is carried out at indoor temperature; 3) sintering, wherein a billet after rough pressing is placed in a sintering furnace to be sintered, sintering temperature is 360-375 DEG C, sintering time is 6 hours, and the billet is naturally cooled to the indoor temperature; 4) fine pressing, wherein the sintered billet is placed in a fine pressing mould cavity for fine pressing forming, the pressure of the fine pressing is 3-5Kg, dwell time is 2-3 seconds, and the fine pressing is carried out at the indoor temperature; 5) burr removing. Products processed through the method are high in precision, high in quality and high in qualification rate, processing is simple, and the products are suitable for batch production and processing.

Description

technical field [0001] The invention relates to a processing method of special-shaped PTFE for filters, that is, a polytetrafluoroethylene support. Background technique [0002] According to the national "Twelfth Five-Year Plan", the new generation of information technology is listed as one of the seven strategic emerging industries in the "Twelfth Five-Year Plan", which is an important direction for the future national strategic development. As the main industry involved in the new generation of information technology, the communication industry will receive strong support in the future development and realize the leapfrog development of the industry. Due to the good development trend of the communication industry, the demand for filters will also continue to grow, and the demand for related components has a huge market space. [0003] At present, there are many types of special-shaped PTFE (polytetrafluoroethylene) supports for filters. Because they play the role of suppo...

AI Technical Summary

Problems solved by technology

Using conventional mechanical processing methods (such as mechanical center, CNC milling machine) processing, the single product processing time is longer, resulting in increased production costs, and due to the complexity of the processing technology, product circulation between multiple processes is prone to product bump damage, There are potential quality risks

The length of the process, the complexity of the processing technology and the flow between multiple processes will directly increase the production cost of the product and affect the quality of the product

The melting point of PTFE for injection molding is 300-312°C. The products produced generally have shrinkage and deformation that do not meet the size requirements and bubbles, which can neither be accurately controlled nor affect the work of the parts in the filter. stability

For products with strict control of size requirements, the rate of defective products produced by one-time injection molding is relatively high, which also increases the production cost of the product virtually.