| 摘要 |
PURPOSE:To prevent positional deviation and rising of an insert sheet, by a method wherein a surplus part is provided on the insert sheet and after performance of molding by fixing the surplus part on a parting part of a molding tool, and the surplus part is cut off and removed. CONSTITUTION:A wire net 11 is blank-processed a size larger than a product form so that a surplus part 14 is left behind extending over almost the whole circumference of a wire net stretching part of a filter. A space 4 holding the surplus part 14 of the wire net 11 is provided in succession to a cavity 2 and a plurality of needlelike projections 5 for fixing the surplus part 14 and recessed parts corresponding to the projections 5 are provided extending over the whole circumference of the cavity 2. The wire net 11 is stretched strongly in a facial direction under a mold broken state and the surplus part 14 is fixed by inserting respectively into a plurality of the projections 5. Then a mold is clamped, molding is performed by filling a molding material into the cavity 2, the mold is broken, mold release is performed and the surplus part 14 is cut off at a C-C line for removal. |
