Horizontal production process of polyurethane rubber roller

Abstract

The invention belongs to the technical field of rubber chemical industry, and in particular relates to a horizontal production process of a polyurethane rubber roller. The invention aims to provide a horizontal production process of a large polyurethane rubber roller for improving the integral physical properties of the rubber roller. The horizontal production process of the large polyurethane rubber roller comprises the processing steps of: dissolving and mixing raw materials, synthesizing prepolymer, pretreating a rubber roller pouring mold, pouring and forming, vulcanizing and grinding, wherein in the pretreating step of the rubber roller pouring mold, the rubber roller pouring mold is horizontally placed and heated to 80-85 DEG C; and the temperature in the pouring and forming step is kept at 80-85 DEG C for pouring and forming. The method provided by the invention improves the pouring mode, and the product has few defects, good appearance quality and excellent integral properties.

Description

technical field [0001] The invention belongs to the technical field of rubber chemical industry, in particular to a horizontal production process of polyurethane rubber rollers. Background technique [0002] At present, with the rapid development of polyurethane raw material synthesis, equipment update, process technology, application research and other projects, ordinary rubber rollers tend to be replaced by new polyurethane rubber rollers (mainly cast polyurethane rubber CPU). The casting process of polyurethane rubber rollers is different from that of ordinary rubber rollers. It is formed by accurately measuring and mixing liquid rubber materials and pouring them into molds to condense. [0003] The production process of traditional polyurethane rubber rollers includes the melting and mixing of raw materials, the synthesis of prepolymers, the treatment of roller cores and molds, casting molding, vulcanization and turning and grinding processing steps. The casting molding ...

AI Technical Summary

Problems solved by technology

[0004] During the whole production process, the pouring machine is fixed, and the frequency of mold movement is relatively frequent, which may easily cause local stress concentration inside the rubber layer, resulting in poor uniformity of physical properties of the rubber roller

In addition, although the vertical pouring method is adopted, although the finished product rate is high, there are many defects: (1) The rubber material at the upper end will shrink and expand under the action of gravity, causing the rubber layer to separate from the roller core; (2) Due to the high center of gravity of the rubber roller , it is easy to cause the eccentricity of the rubber roller, which makes the balance of the rubber roller poor; (3) The heat dissipation of the roller core and the mold is fast during the installation process, and the temperature and the temperature of the rubber material are very different, which is easy to cause the adhesive layer to be weakly bonded, degummed, etc. At the same time, the ambient temperature has a great influence on it, especially in summer and winter; (4) The post-vulcanization treatment process needs to wait for curing, laying flat, and heating in the oven, and many process steps lead to poor production continuity

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