Room temperature vulcanizing high-strength seamless large-scale rubber air sac and production technology thereof

Abstract

A room temperature vulcanizing high-strength seamless large-scale rubber air sac and a production technology relate to a rubber product and the production technology, wherein the room temperature vulcanizing high-strength seamless large-scale rubber air sac comprises an ethylene-propylene-diene monomer (EPDM) outer wrapping rubber fabric with excellent weather resistance, a frame layer which is formed by four layers of continuous high-strength canvases which are staggered to one another by 90 degrees and are arranged with 45 degrees, and an inner rubber layer which is formed by room temperature vulcanizing chloroprene and natural blend. The production technology has the process flows of: a, crude rubber plastication, matching, mixing and piece feeding; b, high-strength canvas gumming and coating; c, being formed on a mould, wherein each layer needs to be rolled by a mechanical roller; d, room temperature vulcanization; e, outer wrapping rubber fabric adhering; and f, hot vulcanizationof an opening edge. The invention can meet the once forming and room temperature vulcanizing of high-temperature and high-strength large-scale seamless rubber products, and the critical requirement of needing a large-scale vulcanizing tank can be eliminated; and the produced large-scale rubber air sac has high compressive strength (the working pressure reaches over 0.8 MPa), and the rubber air sac is mainly used for hoisting pneumatic peltate gate-shaped dams and weights.

Description

technical field [0001] The invention relates to a rubber product and its production process, in particular to a room temperature vulcanized high-strength seamless large rubber airbag and its production process. It is especially suitable for the lifting of pneumatic shield gate dams and heavy objects. Background technique [0002] High-strength rubber products are mostly reinforced by skeleton materials. And heat vulcanization by means of integral molding and pressure. However, large-scale rubber products, especially closed products, are difficult to be produced by thermal vulcanization with integral molding and overall pressure, because the process requires a large flat vulcanizer or vulcanization tank. A typical large-scale rubber product is a rubber dam. The preparation process is to first prepare a vulcanized rubber film, and then use a heat sealing machine to heat-press the vulcanized rubber film to form a rubber dam, that is, a rubber dam with seams. The process is c...

AI Technical Summary

Problems solved by technology

This kind of product has low strength, such as: a 2-meter-high inflatable rubber dam, the operating pressure is 0.02MPa, which is far from meeting the lifting purposes of pneumatic shield gate dams and heavy objects. U.S. Patent (US5713699) discloses a A kind of "overflow shield gate system and its inflatable bag", the core technology is reinforced rubber dam bag (pressure resistance can reach 0.5MPa)

It successfully solves the shortcomings of the existing rubber dams. The main shortcomings of the rubber dam are: ①The service life is short for 15 years (not resistant to aging); and wooden sticks and other stabbing and sliding); ③Low pressure resistance (0.02MPa); ④Easy to paralyze the overall project; ⑤Construction and use are cumbersome

[0003] However, the "bottle diameter" of its large-scale application is complex manufacturing process, demanding production equipment and cost. For example, to make a 5×4m airbag requires a 5-meter-diameter vulcanization tank, and more importantly, in the vulcanization process Without the pressurization of the water cloth, the rubber layers of the dam body are prone to foaming and delamination, and the scrap rate is high

Images