Apparatus for the production of plastic pipes with transverse gr

Details Apparatus for the production of plastic pipes with transverse gr Apparatus for the production of plastic pipes with transverse gr

1982-05-10

1985-01-08

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

264 406, 264508, 425233, 425532, 4253261, B29C 1707

Patent

active

044925514

ABSTRACT:
An apparatus for the production of plastic pipes with transverse grooves comprising half shells each having a mold recess which are arranged on a machine bed driven in a cycle. The half shells are assembled in pairs in a molding path to form a complete mold, the injection head of an extruder being arranged at the beginning of the molding path. Furthermore, the half shells are provided with vacuum channels, each vacuum channel being connected to a respective mold recess. The vacuum channels are joined into vacuum connections formed in the machine bed, and the half shells are provided with cooling channels which join into cooling water inlets and outlets in the machine bed. In order to ensure an exact setting of the half shells during the molding operation, the cooling channels, on the one hand, and the vacuum channels on the other hand, in a given half shell are completely separated from each other.

REFERENCES:
patent: 3473192 (1969-10-01), Martelli
patent: 3776679 (1973-12-01), Hegler
patent: 3919367 (1975-11-01), Maroschak
patent: 3942929 (1976-03-01), Demets
patent: 3950118 (1976-04-01), Adair
patent: 4072453 (1978-02-01), Oltmanns et al.
patent: 4107422 (1978-08-01), Salmon
patent: 4212618 (1980-07-01), Hegler et al.

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