Rotational molding machine

Details Rotational molding machine Rotational molding machine

1996-12-02

1998-09-15

Ryan, Patrick

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

Including support or guide means for disassembled element

264311, 411432, 425233, 425435, B29C 3908

Patent

active

058075895

ABSTRACT:
A screw with replaceable threads is particularly useful to releasably join the spiders of rotational molding machines. The screw comprises a master bolt that passes through a first spider, and a tip that is removably assembled to the master bolt. The tip is threaded to selectively engage and disengage a receiver on the second spider. When the tip is assembled to the master bolt, the screw is captured in the first spider. When the tip has worn through use, it can be replaced without disturbing the master bolt. Similarly, when the tip seizes to the receiver, the tip and receiver are replaceable as a unit without disturbing the master bolt.

REFERENCES:
patent: 3119298 (1964-01-01), Brown
patent: 4022099 (1977-05-01), Ballantyne
patent: 4238537 (1980-12-01), Kerr
patent: 4931008 (1990-06-01), Morrison
patent: 5118236 (1992-06-01), Rodriguez, II et al.

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