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Briefly describe the manufacturing process of polytetrafluoroethylene ptfe corrugated pipe

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Briefly describe the manufacturing process of polytetrafluoroethylene ptfe corrugated pipe

  • Categories:Industry news
  • Author:FEP tube lady
  • Origin:FEP tube lady
  • Time of issue:2008-09-17 15:21
  • Views:

Briefly describe the manufacturing process of polytetrafluoroethylene ptfe corrugated pipe

  • Categories:Industry news
  • Author:FEP tube lady
  • Origin:FEP tube lady
  • Time of issue:2008-09-17 15:21
  • Views:

  1. Introduction to PTFE bellows

  Teflon bellows are also called PTFE bellows, Teflon bellows, Teflon bellows, Teflon bellows, Teflon bellows, and Defluon bellows. The PTFE corrugated pipe is made by special inflation molding. The PTFE pipe is heated to a certain temperature in a certain mold, and a certain internal pressure is given to the pipe to expand the pipe laterally (inflate) and then cool and shape it. be made of.

  characteristic:

  1. High temperature resistance of 260 degrees, acid and alkali resistance, pressure resistance;

  2. High transparency: the refractive index is low among all plastics;

  3. Aging resistance: it can be exposed to ozone and sunlight for a long time without aging;

  4. Corrosion resistance: It can withstand the action of all strong acids, strong oxidants, strong reducing agents and various organic solvents except molten alkali metals, fluorinated media and those above 300°.

  5. The production process can be flanged and flanged;

  6. The corrugated shapes are U-shaped and straight pipes, and other shapes can be customized according to drawings;

  7. Common colors: translucent, transparent, milky white tube.

  2. Specification and model of PTFE pipe

  Outer diameter (unit: mm) other specifications can be customized:

  Metric system: outer diameter 6mm 8mm 10mm 16mm 20mm 25mm 38mm 60mm and so on.

  British system: 1/8 inch 1/4 inch 3/8 inch 1/2 inch 3/4 inch 1 inch.

  

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Figure 1 Source of PTFE bellows: Miss Teflon tube

  3. Answers to common questions about PTFE bellows

  1. PTFE bellows forming machine technology:

  A bellows forming machine includes a base, a lower mold belt, a hydraulic rod, and a fixed tube. The bottom of the base is provided with a shock-absorbing pad, and the base is inlaid with a shock-absorbing layer, and a lifting device is fixed on the base, and the lift A support plate is connected to the device, a connecting rod is fixed on the support plate, and a lower conveying device is connected to the connecting rod. The lower mold belt is connected to the lower conveying device, and the lower mold belt is connected to the mold. The rod is fixed on the support plate, and the hydraulic rod is connected with a connecting plate, the upper conveying device is connected to the connecting plate, and the connecting piece is fixed on the upper conveying device, the upper mold belt is connected to the connecting piece, and the upper mold Both ends of the belt are connected with bolts, the fixed pipe is fixed on the upper conveying device, and a nut is arranged on the fixed pipe. The shock-absorbing pad is fixed on the bottom of the base, and the shape of the shock-absorbing pad is wavy. Both the lower mold belt and the upper mold belt are connected with molds, and the lower mold belt and the upper mold belt are installed in parallel. The connecting piece includes a sleeve, a protruding rod, a spring, and a threaded hole. The sleeve is provided with a protruding rod, and the bottom of the protruding rod is connected with a spring, and the inside of the protruding rod is provided with a threaded hole. There is a threaded connection between the upper mold belt and the upper conveying device, and the width of the upper mold belt is smaller than the width of the upper conveying device.

  2. Teflon bellows seal:

  At present, most of the applications on the market are filled with PTFE sealing surface. When encountering strong corrosive media with particles, the sealing surface wears quickly and causes mechanical seal failure; and with the diversification of the pump application range of the supporting host, it is often applicable. In particle-containing media, the requirements for mechanical seals have also increased. At present, bellows mechanical seal devices on the market all use bellows as a means of transmitting torque, which makes the products insufficient in terms of high temperature resistance. SUMMARY OF THE INVENTION The purpose of the present utility model is to overcome the defects of the prior art, and provide a high temperature resistant, strong corrosion and abrasion resistance that changes the PTFE bellows transmission into a PTFE bellows and screw pin dual transmission structure PTFE bellows mechanical seal device.

  3. Turning of PTFE bellows:

  The material of the PTFE bellows is elastic, the structure is stretchable, the turning process is difficult to clip, and it is not easy to ensure the accuracy of the corrugation size. For this reason, a specific bellows turning process is determined, and the elastic chuck and through holes are designed for the elastic blank. Set of fixtures, use fixed-size tools to ensure the corrugated size, so that the processing accuracy of the bellows meets the design requirements, the sealing performance is stable and reliable, and the service life is long. It has been widely used in chemical pump mechanical seals. This process method is simple and efficient, practical and reliable, and is suitable for other The processing of plastic elastic thin-walled parts has a good reference.

  Fourth, the manufacturing process of PTFE bellows

  It is made by special inflation molding. It is made by heating the PTFE pipe to a certain temperature in a certain mold, and giving a certain internal pressure inside the pipe to expand (inflate) the pipe laterally and then cooling and shaping it. This bellows has the inherent properties of PTFE, and also has high flexibility and elasticity. According to the corrugated shape, there are three types: V type, U type and Ω type. As a connector for corrosion-resistant pipelines, it plays a role in absorbing the change in the length of the pipeline caused by thermal expansion and contraction, and has the role of staggered connection for connecting rigid and brittle pipelines. In order to improve performance, the bellows can also be reinforced with metal rings, metal sleeves, rubber, etc.

  5. Uses of PTFE bellows

  1. It can be used as tubular reactor and exchanger in special occasions;

  2. It can be used as the feeding and discharging pipe of tank truck, storage tank, container and reaction kettle;

  3. It can be used to replace graphite, ceramic, glass and other pipes with lower mechanical strength;

  4. It can be used for pipe misalignment connection or used to balance pipe displacement and dimensional changes caused by weather or other reasons or to eliminate high-frequency mechanical vibration.

  Shenzhen DanKai Technology Co., Ltd. (ShenZhen DanKai Technology Co.,ltd.), whose predecessor was Dongguan Dandi Insulation Material Co., Ltd. Fluoroplastic Material Factory, which was established in 1998, specializes in FEP, PFA, PTFE and other fluoroplastic pipes. R&D, production and sales of rod, sheet and film products and other insulating materials. The company has a senior R&D team with international standards and a production line of fluorine plastic products imported from abroad. Some fluoroplastic products have passed ISO9001, SGS, FDA certification, and have been fully affirmed by domestic and foreign cooperative customers such as Huawei, Foxconn, Midea, ZTE, Intel, and AirTAC. The main products of the company are: ①Tubes: Ptfe tube, Fep tube, Pfa tube, Pvdf tube; ②Heat shrinkable tube: Ptfe heat shrinkable tube, Fep heat shrinkable tube, Pfa heat shrinkable tube, Pvdf heat shrinkable tube; ③Plate rod Membrane: Ptfe board and rod film, Fep board and rod film, Pfa board and rod film, Pvdf board and rod film; ④Insulation materials: silica gel, PE, PVC, UPE, etc.; ⑤Special category: PFA imported connector, spiral tube, spring tube , Rotary cut tube, welding rod, tee, straight-through, gasket, joint, taper rod, flared tube, sealing tube, braided tube, bellows, etc. At the same time, fluorine plastic products of various specifications can be customized and processed according to customer requirements.

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