Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Plural female molds and means to shape parison at each...
Patent
1991-11-25
1993-08-31
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
Plural female molds and means to shape parison at each...
425451, 425540, 425541, B29C 4936, B29C 4956
Patent
active
052407187
ABSTRACT:
A plastic blow molding machine (40) having a wheel (44) rotatable on a base (42) about a horizontal axis (A) includes a plurality of mold stations (90) mounted on the wheel about the rotational axis and having a pair of mold supports (94) movable toward and away from each other in a parallel relationship to the rotational axis at closing and opening stations (114,116). Operating cams (120,124) of the closing and opening stations cooperate with operating cam followers (110) of the mold stations to provide closing and opening mold movement, and locking cam followers (122,126) of the closing and opening stations cooperate with locking cam followers (112) of the mold stations to lock and unlock a lock mechanism (102) that operates directly between the mold supports (94) of each mold station so that there is no loading of the frame (46) of the wheel during the machine operation. The operating cams (120,124) are preferably biased by associated operating gas springs (136,138), and the locking cams (122,126) are likewise preferably biased by locking gas springs (140,142). The wheel (44) includes a frame (46) having a pair of end frame portions (86) and a central frame portion (88). This central frame portion (88) has a pinion (166) mounted thereon and meshed with a pair of racks (170) respectively mounted on the pair of mold supports (94) to center the mold upon closing.
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patent: 4834641 (1989-05-01), Keyser
Kitzmiller Michael C.
Young William C.
Chiesa Richard L.
Plastipak Packaging, Inc.
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