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New technique of wrapping and sulfurizing rubber hose

A new process, the technology of rubber hose, applied in the field of vulcanization process in the production of rubber hose, can solve the problems of not smooth and flat appearance, achieve the effect of smooth and flat appearance, wide application range, and increase equipment investment

Inactive Publication Date: 2005-06-15
上海华瑞橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, this method has simple process, low equipment investment, and good overall compactness of the rubber hose, which can be applied to rubber hoses with general performance requirements. However, after the rubber hose is vulcanized, traces of cloth texture will inevitably be left on the surface, so the appearance is not smooth enough. smooth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The process of the present invention is used for the production of steel wire braided hydraulic rubber hose with an inner diameter of 6-80 mm. The rubber hose is composed of an inner rubber layer, a steel wire reinforcement layer and an outer rubber layer. In the past, the lead-coating process was used for vulcanization, that is, a lead pressing machine was used outside the tube blank After the lead layer is coated, it is vulcanized in a vulcanization tank at 151°C for 60 minutes, and then the lead layer is peeled off to obtain the finished product. Using this process is prone to quality problems such as lead sticking, lead ash, "pearl rice", scratch marks, etc., and the surface of the obtained rubber hose is very greasy, requiring an additional cleaning process. Use a polyester film with a thickness of 30m and whose physical and mechanical properties meet the above requirements. After wrapping with 50% overlap, the vulcanization conditions will remain unchanged, and the...

Embodiment 2

[0024] The new process is used in the production of bridge drilling rubber hose. In the construction process of the bridge, it is necessary to bury the bridge hole-making rubber hose in advance, then cast concrete, and finally pull out the hole-making rubber hose, so that it is used repeatedly until the rubber hose is damaged. Therefore, the flatness and smoothness of the hose surface are important indicators to measure the quality of the hose. This kind of rubber hose is composed of an inner rubber layer, a cloth reinforcement layer and an outer rubber layer, with an outer diameter of more than 70mm. In the past, it was vulcanized by wrapping with cloth. Large and prone to tear damage. Change to a polyester film with a thickness of 40m and whose physical and mechanical properties meet the above requirements. After the wrapping process is lapped by 50%, the original vulcanization process remains unchanged. , reducing the pull-out resistance of the rubber hose when the bridge...

Embodiment 3

[0026] The new process is used in the production of diesel engine pipeline connection rubber hose. This kind of pipeline connection rubber hose is very short, the length is generally not more than 1m, and the pipe diameter is 13-76mm. It is composed of an inner rubber layer, a cloth reinforcement layer and an outer rubber layer. The appearance of the rubber hose obtained by this process is smooth, but the cloth reinforcement layer between the rubber layers is prone to displacement and deformation, which affects the compressive strength of the rubber hose and leads to unstable quality of the finished product. In addition, the compression molding process needs to be equipped with molds and flat vulcanizing machines, and the investment in equipment is relatively large. Use a polyester film with a thickness of 50m and whose physical and mechanical properties meet the above requirements. After wrapping with 50% overlap, it can be vulcanized in a vulcanization tank. The surface of t...

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Abstract

A winding technology for sulfurizing rubber pipe features that the polyester film instead of fabric is used as the external pressing material when the rubber pipe is sulfurized. Said polyester fiml is prepared from poly-terephthalate through drying, fusing while extruding out, bidirectionally drawing and heating treating. The finished rubber pipe has high compactness and smooth external surface.

Description

technical field [0001] The invention relates to a rubber hose manufacturing process in the rubber industry, in particular to a vulcanization process in the production of rubber hoses. Background technique [0002] As we all know, in addition to pure rubber hoses, multi-layer rubber hoses generally composed of inner rubber layer, reinforcement layer and outer rubber layer must use appropriate materials to exert a certain pressure on the outer rubber layer during vulcanization to ensure the tightness between the layers of the rubber hose. Fit to prevent defects such as air bubbles and delamination. Commonly used pressurization methods are: lead-wrapped vulcanization method (also known as molding method) and water-wrapped cloth vulcanization method (see C.W. Evans, translated by Zhao Guangxian, "Rubber Hose Technology", published by Chemical Industry Press, 1983). [0003] The lead-coated vulcanization method is to coat the outer layer of the rubber tube blank with a lead slee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C63/06
Inventor 周国钧王明发范强
Owner 上海华瑞橡胶制品有限公司
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