Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1984-04-09
1987-09-15
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
249 59, 249101, 249144, 249184, 264334, 425542, B29C 4536
Patent
active
046938613
ABSTRACT:
A mold and process for integrally forming a modular helical shaped device such as a screw conveyor is disclosed. The mold has a center operating axis (26) and includes a first section (20A) which forms a portion of the axial member (33). The first section (20A) also forms one of the helical surfaces (36A) disposed around the center axis (26) which has an amount of rotation no greater than 360 degrees. In a similar manner, a second section (20B) is adapted for reciprocating movement along the center axis (26) between an open and closed position with respect to section (20A). The second section (20B) forms the other one of the helical shaped flight members (41). Thus, the two mold sections define a substantially enclosed cavity having an elongated axial portion and a helical shaped flight portion with a selected cross-section that forms the helical shaped device. In a preferred embodiment, there is also included a center rod member (62) which is coaxial with the axial cavity (34A) and operates so that when withdrawn from the cavity it provides an aperture in the resulting axial member (33) of the helical shaped device. In addition, the mold and technique may be used to form helical shaped devices having more than one flight member so long as each flight member does not overlap another flight member.
REFERENCES:
patent: 349233 (1886-09-01), Nelson
patent: 375931 (1888-01-01), Gunckel
patent: 455384 (1891-07-01), Birkholz
patent: 525194 (1894-08-01), Dyson et al.
patent: 546879 (1895-09-01), Dyson et al.
patent: 1090956 (1914-03-01), Zinteck
patent: 1867573 (1932-07-01), Leach
patent: 2133019 (1938-10-01), Campbell
patent: 2492915 (1949-12-01), Carlson
patent: 2864128 (1958-12-01), Heisler et al.
patent: 3461949 (1969-08-01), Nilson
patent: 3584092 (1971-06-01), Alexandris
patent: 3648826 (1972-03-01), Brooks
patent: 3664212 (1972-05-01), Hehl
patent: 3705644 (1972-12-01), Kawchitch
patent: 3891367 (1975-06-01), Signora
patent: 3905416 (1975-09-01), Hammer
patent: 3926401 (1975-12-01), Northup
patent: 4059249 (1977-11-01), Galer
patent: 4079475 (1978-03-01), Thompson
patent: 4107257 (1978-08-01), Swin, Sr.
patent: 4139176 (1979-02-01), Wundsch
patent: 4188178 (1980-02-01), Anscher
patent: 4243199 (1981-01-01), Hill
Housel James C.
Kesterson J. C.
The Laitram Corporation
Woo Jay H.
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