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Thermal contraction inflation continuous expanding method and expanding device

A heat-shrinkable tube and gas-assisted technology, which is applied in the processing field of radiation-crosslinked heat-shrinkable tubes, can solve problems such as low production efficiency and poor product quality, and achieve the effects of improving production efficiency, small longitudinal shrinkage, and reducing friction

Inactive Publication Date: 2005-12-07
CHINA KINWA HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an inflatable expansion method for heat shrinkable tubes, which overcomes the problems of low production efficiency and poor product quality in the negative pressure expansion processing method, and improves the production quality and processing speed of heat shrinkable tubes

Method used

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  • Thermal contraction inflation continuous expanding method and expanding device
  • Thermal contraction inflation continuous expanding method and expanding device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] according to figure 1 As shown, using the principle of high-pressure gas-assisted forming, heat the heat-shrinkable tube at 80-120°C, feed the material at a speed of 2-10 m / min, and introduce high-pressure gas of 0.03-0.05 Mpar to be inflated and formed by high-pressure gas in the expansion mold. After cooling and shaping treatment at 10-25°C, the expansion production process of the heat-shrinkable tube is completed through heating, expansion, cooling, and traction.

Embodiment 2

[0014] On the platform 1 of the continuous expansion machine, a guide roller 2 for heat-shrinkable tubing is provided, and a traction mechanism 4, a water bath box 6, an oil bath box 7, an expansion mold box 9, and a cooling and setting room 10 are arranged in sequence between them, wherein the motor 3 and The traction guide mechanism 4 is connected to drive the heat-shrinkable tube 11 to feed materials. The water bath box 6 and the oil bath box 7 are provided with heating devices, and the heat-shrinkable tube 11 can be heated in a gradient in the box. Pipe expansion mold 8, both ends are sealed and connected with oil bath box 7 and cooling and shaping room 10 through sizing outlet connector 12, control mechanism 5 controls water bath box 6, oil bath box 7 and traction mechanism 4 through corresponding lines End connection, control the feeding of heat shrinkable tubes, heating of water and oil baths, and gas-assisted molding of high-pressure gases.

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Abstract

The invention provides a method and apparatus of hot contraction pipe gas-buffered continuous expanding. The hot contraction pipe directing roller is arranged on the platform of expanding machine; drawing machine, water-bath case, oil-bath case, expanding mold case and cool shaping case are arranged on the platform in order; control machine is connected with the control ends of water-bath case, oil-bath case and drawing machine by the corresponding wires; hot contraction pipe expanding mold is arranged on expanding mold case with its both ends sealing connected with oil-bath case and cool shaping case by caliber exit piece. It adopts high-pressure gas forming principle and positive pressure gas-filled expanding method to heat plasticity the hot contraction pipe, fills high-pressure gas into expanding mold, then cool shapes it. It finishes the expanding process after heating, expanding, cooling and drawing.

Description

Technical field: [0001] The invention relates to expansion technology and production equipment of heat-shrinkable tubes, discloses a method for continuously expanding heat-shrinkable tubes with air, and also provides an expansion device suitable for the method, belonging to the technical field of radiation-crosslinked heat-shrinkable tube processing. Background technique: [0002] At present, in the expansion process of radiation cross-linked heat-shrinkable tubes, negative pressure expansion processing technology is often used. In the expansion mold, the expansion of the heat-shrinkable tube is realized by evacuating the gas outward. The wall phenomenon is serious, and the longitudinal expansion rate of the processed pipe reaches more than 20%, which is 10% smaller than the actual product. The production speed of this method is also relatively slow, and can only reach about 0.3 m / min. Invention content: [0003] The invention provides an inflatable expansion method for he...

Claims

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Application Information

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IPC IPC(8): B29C51/10
Inventor 徐义全李成维朱徇曼朱晓娜高飞王明志
Owner CHINA KINWA HIGH TECH
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