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Heating tube installation structure for plastic heat seal mold

A technology of mold heating and installation structure, applied in the field of plastic heat sealing molds, can solve the problems of high equipment investment cost and operation process requirements, unreplaceable heating tubes, low heat transfer efficiency, etc., to achieve low comprehensive use cost, avoid replacement and scrap, Long service life effect

Inactive Publication Date: 2013-01-30
SHUANGDENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each of the above-mentioned sealing methods has its advantages and disadvantages: low gluing cost, simple operation, but poor reliability and low production efficiency; ultrasonic welding sealing is reliable, but requires high equipment investment cost and operation process; and heat sealing is based on production efficiency. High quality, good sealing reliability and other advantages are more and more favored and valued by people, and have been widely used in many fields of national production
The advantages and disadvantages of the heating plate of the above two structures are more prominent: the heat transfer between the heating tube and the heating plate of the heating tube pre-buried type is good, the temperature change difference is small when the node switch for controlling the temperature is in operation, and the quality and reliability of the heat sealing component However, once the heating tube is damaged, the heating tube cannot be replaced, causing the entire mold to be scrapped; and after the template is formed, the heat-sealing mold with the heating tube installation method is arranged, because there is a certain gap between the mold heating tube installation hole and the heating tube. The thermal conductivity between the two is poor, and the temperature fluctuates greatly during the heat sealing process. Especially because the two mainly rely on radiation to conduct heat, the heat transfer efficiency is low, and the heating tube usually requires a higher temperature to meet the heat sealing temperature requirements of the mold.

Method used

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  • Heating tube installation structure for plastic heat seal mold
  • Heating tube installation structure for plastic heat seal mold

Examples

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Embodiment 1

[0021] Heat-sealing industrial 2V500Ah lead-acid battery ABS plastic case requires the upper cover and barrel to be completely sealed to ensure that the electrolyte does not leak from the seal. The plastic melting temperature is 270°C ± 15°C. In the heat-sealing mold, the overall dimensions of the template 1 are 500mm×300mm×40mm (length×width×thickness). A total of six heating tubes 3 with a single power of 500W are selected, the diameter of the heating tubes 3 is φ16, and the diameter of the heating tube installation holes 2 is φ20 and they are evenly distributed. The heat conduction powder 4 is filled between the heating tube and the template, and the heat conduction powder 4 is electrical grade magnesium oxide (MgO). The heat conduction powder 4 is roasted before filling, and the heat conduction powder 4 is filled with metal wire after cooling. Set up the asbestos pad 5 that thickness is 3mm at the two ends of heating tube installation hole 2, press porcelain cover 6 again...

Embodiment 2

[0023] Heat-sealing the PP plastic case of the 12V100Ah lead-acid battery used for automobile starting requires that the upper cover and barrel body be completely sealed, and the 6 cells must also be completely sealed. The melting temperature of the plastic is 300°C±15°C. In the heat-sealing mold, the overall dimensions of the template 1 are 800mm×500mm×50mm (length×width×thickness). Select a total of six heating tubes 3 with a single power of 1000W, the diameter of the heating tubes 3 is φ25, and the diameter of the heating tube installation holes 2 is φ30 and they are evenly distributed. The heat conduction powder 4 is filled between the heating tube and the template, and the heat conduction powder 4 is electrical grade magnesium oxide (MgO). The heat conduction powder 4 is roasted before filling, and the heat conduction powder 4 is filled with metal wire after cooling. Set up the asbestos pad 5 that thickness is 5mm on both sides of heating pipe installation hole 2, press ...

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Abstract

The invention provides a heating tube installation structure for a plastic heat seal mold. The thickness of a template is proportional to the tube diameter of a heating tube; certain gaps are formed between the heating tube and a template hole; high-temperature-resistant heat-conducting powder is filled among the gaps; the heat-conducting powder is an electric grade oxide; and asbestos pads are arranged at the two ends of a heating tube installation hole, and are compressed against the template through porcelain bushings. The heat seal mold manufactured by using the structure has the advantages of stable mold surface temperature, long service life of the heating tube, convenience in maintaining and very high application value.

Description

technical field [0001] The invention relates to a plastic heat-sealing mold, in particular to a heating pipe installation structure in the plastic heat-sealing mold. Background technique [0002] The invention of plastic has completely changed human life. Especially since the 20th century, with the continuous development of the chemical industry, a variety of synthetic plastics have emerged, and their excellent performance and low price have made plastics more and more closely related to human beings. [0003] The raw material of plastic is a by-product of petrochemical industry, and the source of material is very wide. Its acid and alkali resistance and strong weather resistance are unmatched by other materials. In the process of industrial production, plastic products are mainly used as containers. In civil products, plastics are widely used as the outer shell of products. At the same time, the sealing method between plastics has also received widespread attention. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/02B29C65/02
Inventor 张明奚仁华
Owner SHUANGDENG GRP