PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Fabrication method of PTFE gasket
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-11-21
Visits:
PTFE has a place in the sealing material with its unique properties. PTFE gasket is widely used, gasket requirements can be determined according to the use of the situation, can also refer to the national steel flange non
Metal gasket standard HG/T20606-2009, PTFE gasket processing method has a lot of, here is mainly about eight kinds of commonly used production methods:
1. PTFE plate cutting gasket
Using PTFE plate cutting and processing, usually the plate specifications we produce are relatively large, so we can use turning plate or die plate to directly round the gasket, or cut into squares or round blocks, however
After turning into a gasket by a lathe, the thinner gasket can also be made into a punching die, which is directly punched out under the press. With the improvement of processing conditions, many gaskets can be directly placed on the computer engraving machine
Operate. If the diameter of the gasket is large, we can first process it into a round bar, and then weld it to solve;
Figure 1: PTFE gasket Source: Dankai
2. Teflon Tube Turning Gasket
Using PTFE molded tube turning gasket, PTFE tube turning gasket has good surface flatness, large output, accurate precision, and less waste. It is also a relatively economical processing method. The processing disadvantage is that each
Specifications of the gasket are required to match the tube mold;
3. PTFE Rod Turning Gasket
The gasket is turned using a tetrafluoro rod, which is a solid rod. Generally, the lathe used to make gaskets is small, which saves electricity, and many companies have adopted automatic small lathes, which are convenient for processing. This processing method
It is usually suitable for large or small batch gaskets, while large gaskets are not mainly used for material saving considerations;
Figure 2: PTFE gasket Source: Dankai
4. PTFE molded gasket
Using mold direct compression molding, this kind of gasket generally has certain thickness requirements, such as the required thickness is greater than 3mm, the gasket is directly molded and sintered, the density is better, the pressure is good, but the processing speed
Slow, according to the size of the gasket actual amount of PTFE resin powder input, the material is basically no loss, mold processing is simple, suitable for a certain mass production of products;
5. PTFE coated gasket
The use of tetrafluoro material resistant to strong acid, strong alkali, strong oxidant performance, lining rubber, asbestos, graphite and other sandwich, coated with tetrafluoro layer, which is called PTFE coated gasket, this gasket can adapt to strong acid
Alkali, cryogenic fluid, chlorine and other pharmaceutical, food processing industry;
Figure 3: PTFE gasket Source: Dankai
6. PTFE wound gasket
Metal winding composite gasket, which is made of V-shaped or W-shaped stainless steel strip and PTFE, spiral winding, and spot welding at the beginning and end. It is suitable for high temperature and high pressure steam, oil, gas, solvent and other production occasions;
7. PTFE reinforced gasket
The use of filler material mixed with PTFE resin processing of the plate, tube, and then through the fine turning of the gasket or direct molding to obtain composite material gasket, this composite material production of the gasket pressure, resistance.
Creep, wear resistance, high and low temperature resistance, corrosion resistance, improve the performance of PTFE, but also the direction of the development and utilization of PTFE;
8. expanded PTFE elastic pad
The expanded PTFE material EPTFE is cut into a gasket. The expanded PTFE is composed of fine two-way fibers and is a low-density white PTFE. Compared with ordinary PTFE
It is soft, good resilience, superior creep resistance, and has good sealing performance.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, Gasket, Machining, Utilizing, Turning, Material, Direct, Molding
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