Method of preparing thermoplastic hard foam

Abstract

The invention relates to a method for manufacturing a thermoplastic hard foaming body. The method comprises the following steps: mixing polyurethane, a foaming agent and a catalyst by a mixing device to produce a hard foaming material; injecting the hard foaming material in a mould; shaking the mould to make the hard foaming material evenly shaped in the mould; keeping the mould on standing to cause the hard foaming material to react in the mould and be shaped according to the shape in the mould; and producing a finished product without a joint close after reacting and shaping. The manufacture method not only has the characteristics of simple formulation and easy coloration and the like, but also can easily control fire resistance, humidity resistance, hardness and corrosion resistance of the manufactured finished product without joint seam.

Description

technical field [0001] The present invention relates to the manufacture method of thermoplastic hard foam, especially refers to a kind of mixing polyurethane, foaming agent and catalyst to obtain hard foam material, and make the hard foam material undergo foaming reaction A method of forming a finished product without seams. Background technique [0002] Due to the rapid progress of science and technology and the continuous improvement of people's requirements for the quality of life, all walks of life have been committed to research and development of newer and more advanced products to produce more convenient effects. And this trend is not limited to the field of high-tech products, even common household items that are closely related to people's lives, through people's complaints about their inconvenience and bad design, have also been improved to greatly increase their convenience and progress. This enables manufacturers to design products with better quality of life an...

AI Technical Summary

Problems solved by technology

However, the formula of this rubber foam material is quite complicated, and the dust or chemical substances produced during the manufacturing process are quite polluting to the environment, and the waste produced is not easy to recycle, and has a tendency to be gradually banned.

In addition, the biggest disadvantage of this rubber foam material is that it is difficult to form it into products with complex shapes in the subsequent processing procedures

[0005] Therefore, no matter the characteristics and production methods of the aforementioned two kinds of foam materials, there are its deficiencies and difficulties in taking into account. Therefore, how to continuously produce foams with both general rubber and Foaming materials with the advantages of plastic foaming materials, in order to effectively utilize the advantages of various foaming materials and expand their application fields, has become an important issue faced by various manufacturers at present.

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