双色硅胶底片成型模具及其方法

Dual-color silica gel negative plate molding mold and method thereof

Abstract

The invention relates to a forming die of a double-colored silica gel negative film and the forming method for the film. The die is composed of an upper die, a lower die, a middle plate and a feed plate. The middle plate is positioned between the upper die and the lower die, and the feed plate is above the upper die; wherein, a primary forming die cavity is formed by closing an upper die cavity and a middle plate cavity for forming the light-transmission components of the silica gel negative film; after the middle plate is moved out, the upper die cavity and the lower die cavity are closed toform a secondary forming cavity; and material is fed into the secondary forming die cavity through a feed sprue of the upper die, so as to form shading components distributed around the light-transmission components. By forming two gel materials of different colors on the dies for two times, the invention makes the gel materials of different colors that solidified in sequence be cemented but not permeate each other, thus ensures the color boundary position of the negative film to be clear, therefore the invention can effectively replace the traditional technologies of single color spray coating and laser cutting or blanking after silica gel oil compression forming after TPU thin film printing, greatly lowers the cost and improves the productivity.
本发明涉及一种双色硅胶底片的成型模具及其成型方法,该模具由上模、下模、中板以及注料板构成,该中板介于上模、下模之间,而注料板设于上模之上方;其中,下模型腔与中板型腔闭合形成第一次成型模腔,用以成型硅胶底片的透光部件;中板移出后,上模型腔与下模型腔闭合形成第二次成型模腔;且由上模的注料口向第二次成型模腔中注料,用以成型分布在透光部件缘边的遮光部件。本发明通过将两种不同颜色的胶料在上述模具中分两次成型,使得先后凝固的不同颜色胶料溶接而不会互相渗透,进而使得底片颜色交界处分界清晰,可有效的替换以往单色喷涂镭射切割或TPU薄膜印刷后与硅胶油压成型后冲切等的传统工艺,大大降低成本及提高生产效率。

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