Apparatus for changing vertical-axis extrusion dies

Details Apparatus for changing vertical-axis extrusion dies Apparatus for changing vertical-axis extrusion dies

1987-12-23

1988-10-18

Chiesa, Richard L.

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

425191, 425192R, 425532, B29C 4720

Patent

active

047783699

ABSTRACT:
A die changing mechanism for use with a vertical-axis extrusion apparatus that includes a die housing and an extrusion die section, such as an inner section that is secured to the housing by a threaded connection. The apparatus includes a transportable support assembly and a breaker assembly supported by the support assembly and adapted to be positioned in an initial position in rotationally interlocking engagement with the inner die section. The breaker assembly is connected to the support assembly by threaded means, and is adapted for rotational movement relative to the support assembly about a vertical axis corresponding to the screw axis. The pitch of the threads of the threaded means is the same as the pitch of the threads by which the die section is connected to the die housing. When the breaker assembly is positioned in rotationally interlocking engagement with the die section and then rotated in one direction, it unthreads the die section from the housing and simultaneously transfers the weight of the die section to the support assembly.

REFERENCES:
patent: 1947202 (1934-02-01), Homeier
patent: 2449625 (1948-09-01), Stuart, 2nd
patent: 3321805 (1967-05-01), Given
patent: 3561371 (1971-02-01), Kummer
patent: 3680994 (1972-08-01), Longenecker
patent: 4394116 (1983-07-01), Kuenzig et al.
patent: 4432718 (1984-02-01), Wurzer

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