B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/34 (2006.01) B29C 47/12 (2006.01)
Patent
CA 2515976
System and apparatus for carrying out a thermoplastic material molding process wherein mutually abutting carriage conveyed clamshell molds are driven along a single track locus having vertically disposed tunnel forming and return region. Thermoplastic material is expressed vertically downwardly from a die nozzle located above the forming tunnel entrance elevation and with a diameter corresponding with but slightly less than the maximum diametric extent of a mold cavity within the mold sequence. Where a given mold cavity portion exhibits a minimum or zero cross dimension, the mold cavity is structured having an adjacent accommodation mold cavity portion of greater cross dimension.
Berns John S.
Cantrell George A.
Cyphert David L.
Minderman Harold M.
Mcfadden Fincham
Modern Machine Corporation
Quality Culvert Inc.
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