Device for drawing thermoplastic preforms during the blow moldin

Details Device for drawing thermoplastic preforms during the blow moldin Device for drawing thermoplastic preforms during the blow moldin

1979-08-23

1981-08-18

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

264532, 425154, 425529, B29C 1702, B29C 1707

Patent

active

042843979

ABSTRACT:
Device for the longitudinal drawing of thermoplastic preforms possessing a closed base and an open neck during the blow moulding of these preforms comprising a rod introduced in the preforms through their open neck and arranged so as to exert a controlled axial thrust on the base of the preforms in which the drawing rod is provided with slots and is actuated by a driving sleeve in which it can slide and with which it is rendered integral by means of retractable wedges housed in the slots and held in place by means of calibrated springs.

REFERENCES:
patent: 1899238 (1933-02-01), Kirchhoff
patent: 2001026 (1935-05-01), Kirchhoff
patent: 3859019 (1975-01-01), Wight

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