Mold and mold vent

Details Mold and mold vent Mold and mold vent

B - Operations, Transporting

29

C

18/675

B29C 33/10 (2006.01) B29C 44/34 (2006.01)

Patent

CA 1323156

ABSTRACT OF THE DISCLOSURE Vents for molds can be improved if, in place of a single relatively large vent opening, there is used a vent which has a plurality of relatively smaller vent openings in which the cumulative cross-sectional area of the relatively smaller vent openings are approximately the same as that of the relatively larger vent opening it replaces. It was also found that the vents have a more efficient self-cleaning capability if the ratio of the depth of each vent opening to the cross-sectional diameter of the vent opening is about 1 or less. D-15,931 -49-

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