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Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers

A polytetrafluoroethylene and microwave sintering technology, applied in the direction of drawing spinning, artificial filament heat treatment, etc., can solve the problems of uneven thermal shrinkage of fibers, slow heating speed, high energy consumption, and achieve uniform temperature distribution and temperature rise. The effect of fast speed and high production efficiency

Active Publication Date: 2014-01-29
XIAMEN BARON FLUORIDE MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional sintering device not only has a slow heating rate and high energy consumption, but also often breaks due to uneven thermal shrinkage of the fibers during the sintering process due to uneven heating

Method used

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  • Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers
  • Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers
  • Microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers

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Embodiment 1

[0017] The present invention includes a microwave heating system, a sintering device 3 , a temperature measurement system and a control system 13 , a transmission system and an exhaust system 1 . Wherein, the microwave heating system includes a microwave heating chamber and a microwave generator, and the microwave generator is an existing technology. The microwave heating chamber includes a microwave heating chamber bottom 14, a microwave heating chamber side 10 and a microwave heating chamber top 12, and the There are fiber inlet and outlet ports 18, and the top 12 of the microwave heating cavity is provided with an exhaust hole with an aperture smaller than the microwave wavelength. The microwave generator is composed of 3 to 5 magnetrons with adjustable heating power, and its frequency is 915MHZ, or 2450MHZ are all available; the temperature measurement system is composed of infrared temperature measurement instruments, which are existing technologies and are located at the ...

Embodiment 2

[0020] During work, the linear velocity of the main drive wheel 4 can be set to be 3 to 4 times that of the slave drive wheel 9 . The polytetrafluoroethylene fiber guide port 18 is introduced, and after passing through the guide port 18 and the sintering tank 6 of the sintering device, winding from the rotating wheel 9, and then introduced by another guide port 18, and passing through another sintering tank 7 and then winding the main Rotate wheel 4 and lead to drafting process. Set the microwave heating temperature to 380°C and the heating rate to 60°C / min, start the microwave heating system to start heating the medium (15, 16, 17), and start the main drive wheel 4 and exhaust system 1 at the same time to make the PTFE Vinyl fibers are sintered slowly through the sintering tanks (6, 7) and stretched 3 to 4 times. Correspondingly, the temperature measurement system and the control system 13 installed on the top of the cavity simultaneously measure the temperature of the outer ...

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Abstract

The invention discloses a microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers, which comprises a microwave heating system, a sintering device, a temperature measuring system, a control system and an exhaust system. The microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers is characterized in that a left area and a right area at the top of the microwave heating cavity are provided with exhaust pores with aperture smaller than wavelength of microwave, and a microwave generator comprises magnetrons with adjustable heating power. The temperature measuring system comprises an infrared temperature measuring instrument, and the control system is connected with the infrared temperature measuring instrument and the microwave generator. The sintering device comprises a two sintering tank disposed side by side and a filling medium, and the filling medium is disposed between the two sintering tanks disposed side by side and outside the two sintering tanks. A driven steering wheel and a drive steering wheel are arranged on the left and the right of the outer side of the microwave heating cavity respectively. An exhaust cover covers the exhaust pores and in joint with the exhaust pores. The microwave sintering and drafting device for pasty polytetrafluoroethylene extruded fibers is simple in operation, stable in heating temperature and high in sintering efficiency, and strength and ductility of sintered fibers are high.

Description

technical field [0001] The invention relates to a fiber sintering and drawing device, in particular to a microwave sintering and drawing device for pasty polytetrafluoroethylene extruded fibers. Background technique [0002] Polytetrafluoroethylene (PTFE) is a polymer with high crystallinity and high melting point. Its melt viscosity is extremely high, and it is difficult to flow even when it reaches the melting point. Therefore, it cannot be processed by ordinary plastics, such as casting, extrusion, and injection. etc., can only prefabricate polytetrafluoroethylene into a prefabricated body of a certain shape, and use a method similar to powder metallurgy to sinter and draw it. [0003] The preparation method of polytetrafluoroethylene (PTFE) fiber is not only the film splitting method and the carrier spinning method, but also the paste extrusion method is widely used. The PTFE powder is uniformly mixed with the oil agent and then extruded through the extrusion touch head...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D10/02D01D5/12
Inventor 周丕严王朝阳刘忠良
Owner XIAMEN BARON FLUORIDE MATERIALS TECH
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