A conveying mechanism for carbon dioxide polyurethane foaming machine

Abstract

The invention provides a conveying mechanism for a carbon dioxide polyurethane foaming machine, and belongs to the technical field of preparation of polyurethane foam materials. The conveying mechanism for the carbon dioxide polyurethane foaming machine is simple in structure and is provided with an aluminum block which has a flow guiding effect, and therefore, a driving cylinder is conveniently connected with a reversing valve; the conveying mechanism is provided with a heating device which comprises a temperature sensor and a heating wire, and when the temperature sensor detects that the temperature of the aluminum block is lower than a set value, the heating wire starts to work and heats; the driving cylinder drives a transverse plate to move vertically, and meanwhile drives a first piston rod, a second piston rod and a third piston rod to move vertically, so that an isocyanate metering pump, a combined polyether metering pump and a carbon dioxide metering pump discharge materials simultaneously, and the ratio of isocyanate to combined polyether to carbon dioxide is controlled favorably; and a sliding block is arranged on the third piston rod, and can move on a second connecting rod, therefore, the stroke of up-down movement of the third piston rod is changed, and the flow of the carbon dioxide is changed.

Description

technical field [0001] The invention belongs to the technical field of polyurethane foam material preparation, and in particular relates to a conveying mechanism for a carbon dioxide polyurethane foaming machine. Background technique [0002] Polyurethane (abbreviated as PU in English) is a high molecular polymer produced by the copolymerization reaction of isocyanate and combined polyether. Foaming machine, also known as foam generator, is a device that can make a certain concentration of chemical raw materials into foam and condense into solid. The foaming machine is the core component of polyurethane foam processing equipment. The foaming machine uniformly mixes isocyanate, combined polyether and foaming agent in a certain proportion, and sprays them out under high pressure. The foam, so that its volume increases rapidly, after a period of time, the mixed raw materials exposed to the air condense into a solid (polyurethane foam) with a large amount of foam. At present, ...

AI Technical Summary

Problems solved by technology

After the cylinder exhaust hole is frozen, the cylinder exhaust will not be smooth, causing the cylinder to fail to work

Normally, the cylinder and the reversing valve cooperate with each other to control the linear reciprocating movement of the piston in the cylinder, but because the cylinder and the reversing valve are connected through conduits, the wiring is complicated and laborious

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