B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/708
B29C 45/72 (2006.01) B29C 35/16 (2006.01) B29C 44/42 (2006.01) B29C 45/17 (2006.01)
Patent
CA 1102985
ABSTRACT OF THE DISCLOSURE Shaped synthetic-resin bodies are made in a separable mold by injecting a flowable mass of a synthetic-resin material into the mold cavity. To precool the mass and cause an initial setting at least of the surface thereof, a liquefied gas, i.e. a low-boiling liquid which is in a gaseous state at room temperature and atmospheric pressure, is introduced between the mass and the walls of the cavity. The coolant is discharged from the cavity through at least one controllable cross-section outlet to regulate the contact time between the coolant and the mass. The initial set precooled body is injected from the mold and is subjected to final cooling and temperature homogenization (tempering), e.g. in a liquid bath.
286349
Borden Ladner Gervais Llp
Hanning Robert
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