| 摘要 |
<p>A strainer (1) is described, which is preferably intended for use in a filter valve (35). The strainer (1) is composed of a metal wire basket (2) and an annular support (3) extending around the basket opening (6). A cross rib (4) extends diametrically within the annular support (3). The support (3) and the cross rib (4) are produced in one piece of plastic, which is moulded together with the edge area (5) of the wire basket (2) during moulding. The strainer may be produced by moulding when a split core is used with two mould halves (20, 21) arranged inside the strainer and co-operating with a third mould part (22) for the formation of the moulding tracks (23, 24). Prior to moulding the wire basket is positioned in the mould. When unmoulding, the two halves of the split mould are displaced at an acute angle (30). This is possible when at least part of the opposite sides (7, 8) of the cross rib (4) extends at an acute angle corresponding to the angle of displacement of the mould halves. <IMAGE></p> |
