B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/42 (2006.01) B29C 33/30 (2006.01) B29C 35/16 (2006.01) B29C 49/04 (2006.01) B29C 49/48 (2006.01)
Patent
CA 2471535
A mold assembly (10) for blow molding plastic articles (4) is provided having an upper mold member (12), a lower mold member (14) and a lower support member (16). The lower mold member (14) is preferably a relatively lightweight plate having a generally centrally located molding cavity (30) matingly matched with an upper molding cavity (20) in the upper mold member (12). The lower mold member (14) is moved horizontally and optionally vertically beneath an extrusion head (H) as a molten parison (P) is extruded. The lower mold member(14) is then transported to, and positioned within, the lower support member (16). The upper mold member (12) is then closed over the lower mold member (14) and lower support (16) to close the mold assembly (10). The molten parison (P) is then expanded in the mold cavity (20,30). After the molding operation, the plastic part (4) may be removed and the lower mold member (14) may be cooled by immersion in a cooling fluid. The apparatus to move the lower mold member (14) during extrusion of the parison (P) and to the molding station may be a robotic arm (R). The lower mold member (14) is relatively lightweight so that it may be efficiently moved by the robot arm (R) while the necessary structural support is provided by the lower support member (16).
L'invention porte sur un moule (10) d'extrusion-soufflage d'articles (4) en plastique comportant une coquille sup~rieure (12), une coquille inf~rieure (14) et un support inf~rieur (16). La coquille inf~rieure (14), consiste de pr~f~rence en une plaque relativement l~gre pr~sentant une cavit~ (30) de moulage sensiblement centrale appari~e ~ une cavit~ (20) de moulage m~nag~e dans la coquille sup~rieure (12). On d~place horizontalement et facultativement verticalement la coquille inf~rieure (14) sous la tÚte d'extrusion (H) lors de l'extrusion d'une paraison (P) en fusion. On transporte ensuite, puis positionne, la coquille inf~rieure (14) dans le support inf~rieur (16). Puis on amne la coquille sup~rieure (12) sur la coquille inf~rieure (14) et sur le support inf~rieur (16) pour refermer le moule (10). Puis on extrude la paraison ~ l'int~rieur de la cavit~ de moulage (20,30). Aprs l'op~ration de moulage, on peut extraire la pice (4) de plastique et refroidir la coquille inf~rieure (14) par immersion dans un fluide ad hoc. L'appareil d~pla×ant la coquille inf~rieure (14) pendant l'extrusion de la paraison (P) peut Útre le bras (R) d'un robot. La coquille inf~rieure (14), relativement l~gre, peut facilement Útre d~plac~e par le bras (R) du robot, alors que le support (16) apporte la r~sistance structurelle n~cessaire.
Elgner Roger
Sadr Changize
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Salflex Polymers Ltd.
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