Method of molding socket of plastic resin tube

Details Method of molding socket of plastic resin tube Method of molding socket of plastic resin tube

1977-08-24

1979-12-04

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264322, 425DIG218, B29D 2300

Patent

active

041772377

ABSTRACT:
A socket is molded at the edge of a plastic resin tube with a male mold and a female mold wherein the male mold comprises a large diameter part, a tapered part and a small diameter part and the female mold comprises a barrel for surrounding the male mold small diameter part with a gap larger than the thickness of the resin tube and a split stopper for closing the opening of the annular space formed between the male mold small diameter part and barrel. In the operation, the edge of the resin tube is heated to soften it and it is outwardly fitted on the male mold small diameter part and the stopper is contacted at the boundary part between the male mold small diameter part and the tapered part, or on the small diameter part near the boundary, and the barrel is connected to the split stopper to dispose it about the outer part of the male mold small diameter part, and the resin tube is pushed to the direction of the male mold large diameter part to fill the edge of the resin tube in the annular space formed by the male mold small diameter part and the barrel and the stopper so as to increase the thickness, and the barrel connected with the split stopper which is radially opened and the resin tube is pushed to the direction of the large diameter part so as to outwardly fit the edge of the resin tube having the thickness increased part on the male mold large diameter part.
In the other embodiment, the barrel is not split and can be contacted with the split stopper. In this case, after increasing the thickness of the resin tube, the stopper is taken out from the male mold by radially opening it and the barrel is taken out to the direction of the male mold large diameter part.

REFERENCES:
patent: 3899565 (1975-08-01), De Putter

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