Method for die-cutting foam

Abstract

The invention relates to a method for die-cutting foam. The method comprises the following steps that a first protective film is attached to a second protective film; the second protective film is primarily punched; the second protective film is attached to protective film waste after primary punching to be separated from the second protective film; then the foam, double faced adhesive tape and afirst release film are sequentially attached to the second protective film; an inner frame is obtained through secondary punching on the first release film and the foam, and the first release film onthe surface of the inner frame and the inner frame waste obtained after secondary punching are removed; the first release film on an intermediate product is completely removed, a complete second release film is attached to the surface of the foam, an outer frame is obtained through tertiary punching on the second release film, the foam and the second protective film, all waste on the appearance ofthe product is removed, and the second release film on the product is removed; and the outer frame is larger than the inner frame in size. Compared with the prior art, the method has the advantages of high processing precision, no product deformation, no arching of the protective films and the like.

Description

technical field [0001] The invention relates to the technical field of die-cutting, in particular to a method for die-cutting foam. Background technique [0002] For electronic products, a large amount of cushioning materials will be used in the application process. These cushioning materials are mostly foamed foam (referred to as: foam) in the die-cutting industry. Due to differences in assembly methods and product shapes, this As a result, the proportion of abnormalities in the die-cutting process is as high as 30%. The existing die-cutting process is divided into two times of punching. First, the protective film is pasted on the non-leaving surface of the release film, and then glue and foam are pasted on the release surface. The sticky pull-down of the protective film removes the foam waste in the inner frame, and then sticks the protective film on the front and back of the release film; then punches out the shape of the outer frame and the inside of the product twice, ...

AI Technical Summary

Problems solved by technology

At present, the problems of this process are as follows: the waste of the foam inner frame is attached to the release film in the first step, and the waste is discharged by the protective film. The adhesive of the protective film and the release film are not strong, which makes it difficult to discharge the foam waste. , not easy to discharge, affecting the follow-up process; and during the second punching, the knife is punched from the surface of the protective film, because the foam has an internal hollow structure, the protective film on the foam is easy to be squeezed and wrinkled by the knife die; the waste of foam Difficulty in discharging and extrusion and wrinkling of the protective film will further cause the waste of the inner frame of the foam to be displaced due to waste discharge, resulting in unqualified product size or high size error; After the film, the weak adhesion between the foam and the protective film will also cause the protective film to arch, resulting in unqualified products

The unqualified rate of products processed by the current process is too high, which cannot meet the production demand

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