| 摘要 |
The bellows (6) of a filter cartridge is inserted into an injection-molding die (3) and provided with the plastic frame (24) by an injection-molding process. The surfaces of the die (3) that lie opposite one another are provided, at least at their edge surfaces (15), with sawtooth-like profiles (1, 2; 30, 31). The sawtooth-like profiles engage with one another and hold the individual folds (22, 23; 35, 36) of the bellows (6) in a defined position relative to one another. The bellows (6) is held by the profiles (1, 2; 30, 31) at its face edges (19) over a narrow region (18), and pressed together, forming a seal, for the injection-molding process.
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