A polyurethane foam machine

Abstract

The invention relates to the technical field of foaming machines, in particular to a polyurethane foaming machine. The polyurethane foaming machine comprises a first raw material tank, a second raw material tank, gas inlet mechanisms, charging mechanisms, a stirring mechanism, support fixing rods, a pressurizing mechanism, a mixing mechanism and a temperature control mechanism, first stirring blades which are arranged spirally counterclockwise are arranged on outer side walls of rotating posts, second stirring blades which are arranged spirally clockwise are arranged on outer side walls of therotating posts and located at bottoms of the first stirring blades, and when the rotating posts rotate clockwise, the first stirring blades can be used for continuously and vertically turning over and stirring raw materials to increase the stirring efficiency. The second stirring blades are used for continuously and downwards pressurize and stir raw materials to facilitate discharge of the raw materials. When the temperature of the raw materials is decreased, liquid mercury contacts, springs push pistons to drop, push rods drive sliding pieces on sliding rheostats to drop, the resistance is reduced, and the current is increased, so that the temperature of electric heating plates is increased; otherwise, the temperature of the electric heating plates is decreased, and the temperature in the raw material tanks is kept accurate and constant.

Description

technical field [0001] The invention relates to the technical field of foaming machines, in particular to a polyurethane foaming machine. Background technique [0002] Polyurethane foaming machine is a special equipment for pouring and foaming polyurethane foam. As long as the performance indicators of the polyurethane component raw materials (isocyanate component and polyether polyol component) meet the formulation requirements. This equipment can produce uniform and qualified foam products. It is made of polyether polyols and polyisocyanates in the presence of various chemical additives such as foaming agents, catalysts, and emulsifiers, and foams through chemical reactions to obtain foamed plastics. The polyurethane foaming machine can be used for automotive interior decoration, thermal insulation wall spraying, thermal insulation pipe manufacturing, bicycle and motorcycle seat sponge processing. In the high-pressure foaming machine, the two components A and B are sent...

AI Technical Summary

Problems solved by technology

[0003] In the polyurethane foaming process, two raw materials A and B need to be transported by air pressure in two raw material tanks respectively. The raw materials need to be stirred in the raw material tanks to prevent the deposition and stratification of the raw materials. The traditional stirring method cannot stir unevenly. And it does not have the function of pressurized conveying materials

At the same time, crystallization is easy to occur in the raw material when it is lower than 10°C. The temperature of the raw material must be controlled above 10°C. The traditional method uses a hot and cold water machine to cool down with cooling water. The temperature of the cooling water must be strictly controlled. The temperature control is difficult to be precise and constant

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