Foam molding and method for producing same
A foam molding, manufacturing method technology, applied in chemical instruments and methods, engine components, machines/engines, etc., can solve the problems of impact resistance, scratch resistance, and application scope limitations, and achieve smooth High performance, excellent mold followability, and excellent rigidity
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no. 1 approach
[0145] The first embodiment is a method including the steps of: expanding and fusing pre-expanded particles containing resin to form a foam body including a foamed layer composed of expanded particles; heating a mold for foam molding The process of disposing the above-mentioned foam body inside the mold for foam molding to a temperature above the glass transition point (Tg) or the melting point of the above-mentioned resin, and preheating the foam body; A step of compressing the foam body to the size of the mold to form a surface layer and a compression-deformed layer; and a step of cooling the mold to solidify the surface layer to obtain the foamed molded body with a design surface of the present invention.
[0146] The second embodiment is a method including the steps of filling pre-expanded particles containing resin in a mold for foam molding, and injecting a heat medium at a temperature at which the pre-expanded particles are fused into the mold. Inside, the process of fo...
no. 2 approach
[0196] [[Manufacturing method of the second embodiment]]
[0197] Next, the second embodiment of the manufacturing method of the foam molding of the present invention (hereinafter referred to as "the manufacturing method of the second embodiment") will be described.
[0198] In the manufacturing method of the second embodiment, the pre-expanded particles are expanded and fused in the mold for foam molding to form a foam, and at the same time, the formation of the compressively deformed layer driven by pressing and the process of heating and cooling are performed simultaneously. Method of surface layer formation. In this method, by providing heating and cooling functions to the inside of the mold for foam molding, and further providing the above-mentioned mold with the compression mechanism shown in the manufacturing method of the first embodiment above, the surface can be formed simultaneously with the molding of the foam molding. layer and compressively deformable layer are ...
Embodiment
[0239] Embodiments of the present invention will be described below through examples. However, the scope of the present invention is not limited by the Examples at all.
[0240] The evaluation methods used in Examples and Comparative Examples will be described below.
[0241] (1) Surface layer thickness
[0242] The foamed molded body was cut in a direction perpendicular to the surface, and the obtained cross section was observed with a microscope (VHX-2000 KEYENCE Corporation). Specifically, get figure 1 An image of such a cross-sectional view. The cross-sectional shape of the foamed particles was observed on the image of the cross-sectional view, and the boundary between the surface layer and the compressively deformed layer was confirmed by the presence or absence of independent cells. The surface layer is a layer in which a plurality of cell structures independent by resin partitions do not exist continuously, and individual cell structures abnormally generated during ...
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Abstract
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