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PEEK material annealing method

A technology of annealing and composite materials, which is applied in the field of composite materials, can solve the problems of large heat and uneven distribution of annealing temperature, and achieve the effects of fast heating and cooling speed, better annealing effect, and improved performance

Inactive Publication Date: 2019-02-15
NANJING COMPTECH COMPOSITES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The annealing method is generally to immerse the product in hot water or in hot air circulation, but the annealing temperature distribution in the hot air is not uniform enough, and the heat required for annealing in hot water to heat up or cool down is too large

Method used

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  • PEEK material annealing method

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Embodiment 1

[0012] A PEEK material annealing method, the steps are: extrude the PEEK material into a rod or tube, and then place it in a metal tube for annealing. The metal tube is preferably a seamless steel tube, which has low manufacturing cost, is not easy to deform, and can be used repeatedly. Others can also be used. Metal pipes, such as seamless aluminum pipes, copper pipes, etc. The length of the metal tube is greater than or equal to the length of the PEEK rod or the PEEK tube, the inner diameter of the metal tube is slightly larger than the outer diameter of the PEEK rod or the PEEK tube, and the annealing step is to heat up the PEEK rod or the PEEK tube in the metal tube and the tube to 180~260℃, the heating rate is 8~30℃ / h; constant temperature insulation, the time is 0.5~2h according to the wall thickness of the product; then it is lowered to 150℃~room temperature and taken out, the cooling rate is 2~12℃ / h.

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Abstract

The invention discloses a PEEK material annealing method which comprises the following steps: extruding PEEK material into rodlike or tubular, and then placing the extruded PEEK material in a metal tube for annealing. According to the PEEK material annealing method, a PEEK rod or a PEEK tube is placed in the metal tube for annealing, and the performance of the PEEK rod or the PEEK tube after annealing can be effectively improved; and the metal tube is high in warming and cooling speed and easy to control and can save energy.

Description

technical field [0001] The invention relates to a PEEK material annealing method and belongs to the technical field of composite materials. Background technique [0002] PEEK products are in the thin-thick junction, if the thick part cools down slowly, and the thin part cools down quickly, then uneven shrinkage will occur at the joint, resulting in stress concentration. This phenomenon is more obvious around the metal inserts. If the annealing treatment is not performed, cracks, even cracks or deformation will occur at the stress concentration part after a period of time. Therefore, PEEK products need to be annealed during the preparation process to eliminate internal stress, improve the crystallinity of the product, thereby improving its strength and chemical resistance, and finally obtain the best dimensional stability. The annealing method is generally to immerse the product in hot water or in hot air circulation, but the annealing temperature distribution in the hot ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C71/02B29K71/00
CPCB29C71/02B29C2071/022B29K2071/00
Inventor 杨文光靳予孙克原王孝刚夏炎陈朝曦林丰焦小东陈佩民徐小曼刘雪梅
Owner NANJING COMPTECH COMPOSITES CORP