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A method for seamless welding of ultra-high molecular weight polyethylene sheets

An ultra-high molecular weight, seamless welding technology, which is applied in the field of seamless welding of ultra-high molecular weight polyethylene sheets, can solve problems such as poor fluidity, difficulty, and high viscosity, and achieve uniform color, uniform weld joints, and good welding effects.

Active Publication Date: 2017-06-27
沈金峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the viscosity of ultra-high molecular weight polyethylene (UHMW-PE) in the molten state is as high as 108Pa*s, its fluidity is extremely poor, and its melt index is almost zero, so it is difficult to process it with general mechanical processing methods. It is also very difficult to butt together the plates; there is no efficient and simple method in the prior art that can effectively process the seamless butt joint of UHMWPE plates

Method used

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  • A method for seamless welding of ultra-high molecular weight polyethylene sheets
  • A method for seamless welding of ultra-high molecular weight polyethylene sheets
  • A method for seamless welding of ultra-high molecular weight polyethylene sheets

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Embodiment 1

[0034] Such as Figure 1-4 shown.

[0035] A method for seamless welding of ultra-high molecular weight polyethylene sheets is applied to the processing of two ultra-high molecular weight polyethylene sheets, including the following steps:

[0036] 1) Processing of the docking part; select two ultra-high molecular weight polyethylene sheets of 1500*5000*15mm made by the molding process, and groove the sides of the two UHMWPE sheets 1 with a length of 1500mm to be docked 2; the length of the groove 2 is 1500mm, the width is 10cm, and the slope is 40 degrees;

[0037] 2) Groove docking; two grooves 2 are butted on the hot-press welding equipment, and the groove 2 is filled with ultra-high molecular weight polyethylene plate powder 3 and is 10mm higher than the plate surface; the ultra-high molecular weight polyethylene The mass percentage of the components of the plate powder 3 is 16‰ of additives, 3‰ of color masterbatch, and the balance is ultra-high molecular weight polyeth...

Embodiment 2

[0043] Such as Figure 5-6 shown.

[0044] A method for seamless welding of ultra-high molecular weight polyethylene sheets as described in Example 1, the difference is that the method is applied to cylinder processing, and described step 1) is to use a piece of ultra-high molecular weight polyethylene sheet of 1500*5000*15mm The two sides of the molecular weight polyethylene sheet with a side length of 1500mm are beveled.

Embodiment 3

[0046]The method for seamless welding of ultra-high molecular weight polyethylene sheets as described in embodiment 1 or 2, the difference is that in the step 4), the specific process of cooling and increasing the pressure is to stop heating the butt joint 6 , boost the pressure to 12MPa, and cool with circulating water for 60 minutes. Circulating water cooling not only improves the cooling rate, but also is clean and pollution-free, and the circulating water saves resources.

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Abstract

The invention relates to a method for seamless welding of ultra-high-molecular-weight polyethylene plates. The method realizes seamless welding by filling ultra-high-molecular-weight polyethylene powder into the groove, and the welding effect is good, and two plates can be completely fused together. , to achieve the purpose of a seamless welding; the temperature and pressure raised during the welding process are basically the same as the temperature and pressure raised during the process of pressing the ultra-high molecular weight polyethylene sheet, and the ultra-high pressure added at the groove The molecular weight polyethylene sheet powder is the same as the material used for pressing the sheet, and the appearance and physical properties of the sheet at the docking part are consistent with the ultra-high molecular weight polyethylene sheet that needs to be docked.

Description

technical field [0001] The invention relates to a method for seamless welding of ultra-high molecular weight polyethylene plates, belonging to the technical field of ultra-high molecular weight polyethylene plate processing. Background technique [0002] The English name of ultra-high molecular weight polyethylene is ultra-high molecular weight polyethylene (UHMWPE for short), which is polyethylene with a molecular weight of more than 1 million. UHMWPE has excellent wear resistance, good low temperature impact resistance, self-lubrication, non-toxic, water resistance, chemical resistance, heat resistance is better than general PE, the disadvantage is that heat resistance (heat distortion temperature) is low, Poor formability, outer surface hardness, rigidity, and creep resistance are not as good as general engineering plastics, and the expansion coefficient is too large. Based on the excellent characteristics of ultra-high molecular weight polyethylene sheets, it is widely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C65/02
Inventor 李建华张国伟宋庆凯
Owner 沈金峰
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