Manufacture method of foaming ball

Abstract

The invention relates to the technical field of manufacture methods of foaming balls, in particular to a method for manufacturing a foaming ball from acrylic-based resin. The method comprises the following steps of (1) injection moulding, wherein the acrylic-based resin and a foaming additive are added into an injection moulding machine, and are extruded through a screw rod; and then an injection moulded foaming ball intermediate is obtained through the steps of mould clamping, adhesive injecting, pressure maintaining, cooling and mould opening; (2) cooling and foaming, wherein the foaming ball intermediate obtained in the step 1 is taken out of a mould, and is placed in cooling water for cooling and foaming so as to obtain the required foaming ball; the foaming additive is gasified into a low molecule organic matter in a heating condition, and is decomposed to generate a large amount of gas, so that molten solid acrylic-based resin contains a great number of bubbles; the foaming ball is enabled to enter a forming mould for forming, and then is placed in cooling water for cooling; the surface of the foaming ball is sized rapidly in the cooling water; and waste heat exists in the internal part of the foaming ball intermediate, and the acrylic-based resin in the inner part is subjected to cooling shrinkage so as to extrude the bubbles therein, and uniform and beautiful bubbles are generated.

Description

technical field [0001] The invention relates to the technical field of preparation methods of foam balls, in particular to a method for making foam balls with acrylic resin. Background technique [0002] Bubble balls are widely used in handicrafts, lighting, decoration, crystal crafts, glass products and accessories. They have a bright appearance and can be made into different colors, sizes and shapes. The size and density of bubbles in the bubble balls vary, resulting in different visual Effect. At present, the preparation method of foamed balls mainly uses acrylic resin as raw material, and then adds foaming agent to make them. The foamed balls produced by the existing technology have poor dimensional stability, shrink easily, the bubbles are not uniform enough, and weld lines are easy to occur; once If it shrinks, the foam ball may be deformed and become an unqualified defective product. Therefore, how to ensure that it does not shrink or keep the size of the shrinkage a...

AI Technical Summary

Problems solved by technology

At present, the preparation method of foamed balls mainly uses acrylic resin as raw material, and then adds foaming agent to make them. The foamed balls produced by the existing technology have poor dimensional stability, shrink easily, the bubbles are not uniform enough, and weld lines are easy to occur; once If it shrinks, the foam ball may be deformed and become an unqualified defective product. Therefore, how to ensure that it does not shrink or keep the size of the shrinkage as small as possible is the difficulty in making foam balls.