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Method for manufacturing special-shaped electrical wire sheath using liquid silastic injection molding method

A liquid silicone rubber, injection molding technology, used in the field of injection molding to manufacture thin-walled special-shaped products and rubber products, and can solve problems such as air bubbles and lack of glue.

Active Publication Date: 2009-06-24
SHANGHAI PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for low-viscosity liquid silicone rubber materials and products with complex shapes, this feeding method has major problems, and it is easy to produce waste and defective products such as lack of glue and air bubbles.

Method used

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  • Method for manufacturing special-shaped electrical wire sheath using liquid silastic injection molding method
  • Method for manufacturing special-shaped electrical wire sheath using liquid silastic injection molding method
  • Method for manufacturing special-shaped electrical wire sheath using liquid silastic injection molding method

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Embodiment

[0016] see figure 1 and figure 2 , producing a figure 1 The size of the wire protective sleeve for the electric coffee pot shown is also shown in the figure. It is made of liquid silicone rubber material LSR2660 produced by GE with a viscosity of 250Pa s (20°C), and is produced by injection molding. The injection port [1] Set at one end of the product axis, the size is 0.5mm. The process conditions of injection molding are: vulcanization temperature 150±5℃, clamping force 100~120kg / cm 2 , injection pressure 80kg / cm 2 , injection speed 60mm / s. The products produced in this way do not have the problems of lack of glue and air bubbles, and there is no lack of glue in the circular sheets at both ends, and the appearance of the product has no defects.

[0017] On the contrary, according to the traditional injection molding process, such as image 3 and Figure 4 As shown, the injection port [2] is set in the middle of the product, and its size is 2mm. The injection molding ...

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Abstract

The invention relates to a method for manufacturing an abnormity wire jacket through a liquid silicon rubber injection molding, which is characterized in that during injection molding, a rubber injection port is arranged at the axial end of a product and the size of the rubber injection port is between 0.3 and 0.8 millimeter. During the injection molding, the injection pressure is between 75 and 85 kilometers / centimeters<2>, the mold locking force is between 100 and 120 kilometers / centimeter<2> and the injection speed is between 55 and 65 kilometers / centimeter<2>. The viscosity of the liquid silicon rubber used for the injection molding is between 200 and 300 Pa.s.

Description

technical field [0001] The invention relates to the rubber product industry in the chemical industry field, in particular to a method for manufacturing thin-wall special-shaped products by injection molding using liquid rubber, that is, liquid silicone rubber. Background technique [0002] At present, small household appliances have penetrated into all aspects of people's lives and brought great convenience to people's daily life. At the same time, people are paying more and more attention to the safety and environmental protection problems caused by it. Taking the new electric coffee pot designed abroad as an example, the rubber wire protective cover used in it has extremely high requirements. First of all, in order to ensure that the volume of the coffee pot is not too large, the designers have simplified and combined the size and shape of the accessories, so the shape of the protective cover product is more complicated. Secondly, the requirements for environmental protec...

Claims

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Application Information

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IPC IPC(8): B29C45/27B29C45/76B29K83/00B29L31/00
Inventor 李敏邓治国王春华
Owner SHANGHAI PLASTICS RES INST CO LTD
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