公开(公告)号：US3914368A

公开(公告)日：1975-10-21

申请号：US46370574

申请日：1974-04-24

Applicant: COMBUSTION ENG

Inventor： HARKNESS RICHARD ERNEST

IPC: B07B1/46 ,  B29C33/00 ,  B29C39/00 ,  B29C70/68 ,  B29C70/70 ,  B29D28/00 ,  B29D3/02

CPC classification number: B07B1/4618 ,  B29C33/0033 ,  B29C39/00 ,  B29C70/688 ,  B29C70/70 ,  B29D28/005 ,  B29K2105/206 ,  B29K2705/00 ,  B29L2031/737

Abstract: A method of making plastic screen where a plurality of pegs are vertically positioned within an open topped mold by passing a peg through each opening of a positioning screen member located above the mold, and a castable liquid plastic is then poured into the mold. The bottom ends of the pegs are tapered, so that the holes or openings in the finished plastic screen are flared. Metal reinforced plastic screen is made in the same manner, only a peg is positioned within each opening of a metal screen, whose openings are the same size as, and are in alignment with, the openings of the positioning screen member, the metal screen being positioned closely adjacent the mold bottom or base, and the liquid plastic is poured into the mold to a height above the metal screen. The pegs are smaller than the metal screen openings, so that no metal is exposed in the finished article.

Abstract translation: 一种制造塑料筛的方法，其中多个钉通过使钉穿过位于模具上方的定位筛构件的每个开口而垂直定位在开顶模具内，然后将浇注液体塑料倒入模具中。 销钉的底端是锥形的，使得成品塑料屏幕中的孔或孔开口。 金属增强塑料屏以相同的方式制成，只有一个钉位于金属丝网的每个开口内，开口尺寸与定位筛件的开口尺寸相同，并且与定位筛件的开口对齐，金属筛网为 定位成靠近模具底部或底部，并且将液体塑料倒入模具中高于金属屏幕的高度。 钉子比金属筛孔小，因此在成品中不会露出金属。