US 11,745,400 B2
Vented mold
Brian Beamish, North York (CA); Stephen T. McGrath, Brampton (CA); and Kevin G. Kangas, Troy, MI (US)
Assigned to Proprietect L.P., Toronto (CA)
Appl. No. 15/756,140
Filed by Proprietect L.P., Toronto (CA)
PCT Filed Aug. 30, 2016, PCT No. PCT/CA2016/051021
§ 371(c)(1), (2) Date Feb. 28, 2018,
PCT Pub. No. WO2017/035644, PCT Pub. Date Mar. 9, 2017.
Claims priority of provisional application 62/212,109, filed on Aug. 31, 2015.
Prior Publication US 2018/0243954 A1, Aug. 30, 2018
Int. Cl. B29C 44/58 (2006.01); B29C 33/10 (2006.01); B29L 31/58 (2006.01); B29K 75/00 (2006.01)
CPC B29C 44/588 (2013.01) [B29C 33/10 (2013.01); B29K 2075/00 (2013.01); B29L 2031/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mold system comprising:
a molded part; and
a first mold element and a second mold element releasingly engagable between an open position and a closed position to define a mold cavity for the molded part in the closed position and a first part line between the first mold element and second mold element;
the first mold element comprising a first mold portion and a second mold portion configured to be separable with respect to one another to define a second part line therebetween disposed interiorly with respect to a periphery of the first part line;
at least one vent disposed in the second part line, the at least one vent comprising an open passageway configured to permit mold material in the mold cavity to enter but not to exit the open passageway to cause at least partial curing of the mold material in the open passageway, the open passageway being free of any obstruction between the mold cavity and an exterior of the mold;
wherein (i) the second part line is positioned to correspond to a B-surface of the molded part, and (ii) the open passageway is configured such that mold material entering the passageway is attached entirely to the B-surface of the molded part; and
wherein the mold comprises the molded part disposed in the mold cavity and molded material attached to the molded part disposed in the at least one vent.