| 摘要 |
A process and a molding unit for the automatic molding, expelling and assembling to one another of at least a pair of plastic handles for a plastic bag, consisting of a male and female handles (A and B) and provided with snap fastening means for closing said bag, characterized by the use of a molding unit comprising: two mold blocks, each having a cavity for removably receiving a mold, respectively said cavities and the molds forming two juxtaposed molding chambers, separated from one another by slidable wall members constituting in combination the countermolds of the two respective molding chambers in operative position thereof, means for moving the mold blocks together with the molds to and from one another, means for slidably moving said slidable wall to and from its closing position, injection means for feeding molded plastic material into both molding chambers shaped to form a female and a male handles (A and B), punch means to form in each male handle (A) each pin of the snap fastening means as well as the respective pin receiving holes, and stripping means for the expulsion from said molding chambers and mutual assembling of each pair of the male and female handles (A and B) to one another.
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