Automatic molding method and equipment for polytetrafluoroethylene thick products

Abstract

The invention discloses a polytetrafluoroethylene thick product automatic molding method, and is characterized in that the method comprises the following steps: 1) arranging a pressing mechanism providing pressure; arranging a polytetrafluoroethylene thick product molding mechanism; arranging a displacement sensing device for detection of a stroke of the pressing mechanism; and arranging a control device for coordinating a pressing process, wherein the control device is electrically connected with the pressing mechanism, the molding mechanism and the displacement sensing device; 2) material packing: adding a premixed polytetrafluoroethylene mixture into a molding mold; and 3) pressing molding: according to information feedback of a pressure device and the displacement sensing device, controlling the pressing mechanism to perform multi-segment pressing molding on the polytetrafluoroethylene mixture in the molding mechanism through the control device. The invention also discloses a polytetrafluoroethylene thick product automatic molding device for implementing the method. With adopting of conditional automatic multi-segment pressing, air in the molding mold can be fully discharged, a blank material is pressed densely and uniformly, and the product quality is more stable.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene thick product forming technology, in particular to a polytetrafluoroethylene thick product automatic forming method and equipment thereof. Background technique [0002] Existing polytetrafluoroethylene guide rail soft belts and guide belts are all made of thick polytetrafluoroethylene blanks by rotary cutting, and the thick polytetrafluoroethylene blanks can be used after cold pressing and sintering. The cold press molding process is similar to powder metallurgy. The mixed PTFE mixture is added to the mold and pressed into shape. Because the billet is large and filled with a lot of materials, the pressing process is extremely demanding, and the uniformity of the billet and whether the exhaust is perfect will directly affect the quality of the billet. Severe cases may even cause the blank to crack and cause the blank to be scrapped. [0003] At present, the existing polytetrafluoroethylene (PTFE) thic...

AI Technical Summary

Problems solved by technology

However, the operation is relatively complicated, the operation of personnel is random, the operation method is not uniform, and the personnel flow is large, which increases the difficulty of personnel training

Such artificial arbitrary suppression, relying on personal operating experience, leads to great differences in quality and high defective rate

Due to the randomness of the operator's operation method, in order to save time and effort, one-time pressing with irregular speed is adopted, which leads to many problems in the product

[0004] Some automatic hydraulic machines on the market are controlled by variable pumps, servo valves and displacement sensors to replace manual operations, but they have high environmental requirements, and PTFE cold-pressing sites often have a lot of powder, which is difficult to meet the requirements of servo valves. Guarantee the stable operation of the servo valve, and the cost of equipment configured in this way is high, the function utilization rate is low, and it is not in line with enterprise benefits

More importantly, although the current hydraulic press is automated, its pressing method is still the traditional one-time pressing. Due to the imperfect pressing method, the production efficiency has been improved, but the production quality still cannot be improved.

[0005] Therefore, it is necessary to develop an automatic forming process that can produce high-quality polytetrafluoroethylene thick products, as well as automatic production equipment that can implement the automatic operation of the method, so as to solve the problem of imperfect existing forming methods, backward equipment, and complicated manual operations. Problems such as defective products and low productivity caused by reasons such as inconsistent personnel operation methods

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