US 11,806,900 B2
Sealing device for use in molded foam pad production
Darren Legh, Wolverhampton (GB); Antony Baxter, Warwickshire (GB); Myriam Molina, Coventry (GB); and Christopher Whiley, Wolverhampton (GB)
Assigned to LEAR CORPORATION, Southfield, MI (US)
Filed by LEAR CORPORATION, Southfield, MI (US)
Filed on Aug. 13, 2020, as Appl. No. 16/992,521.
Prior Publication US 2022/0048220 A1, Feb. 17, 2022
Int. Cl. B29C 33/00 (2006.01); B29C 44/58 (2006.01); B29C 44/02 (2006.01); B29K 105/04 (2006.01)
CPC B29C 33/0038 (2013.01) [B29C 33/0033 (2013.01); B29C 44/02 (2013.01); B29C 44/58 (2013.01); B29K 2105/04 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A mold tool assembly comprising:
a first tool having a protrusion for producing a hole in a foam body;
a second tool configured to cooperate with the first tool to define a foam body cavity for molding the foam body, the second tool defining a protrusion cavity corresponding to the protrusion such that the protrusion of the first tool is aligned with the protrusion cavity of the second tool;
a movable plunger for clearing flash corresponding to and located at least partially within the protrusion cavity in the second tool aligned with the protrusion and positioned such that the movable plunger seals the protrusion cavity from foam entering the protrusion cavity, and movable between a disengaged position when the first and second tools are separated, and an engaged position when the first and second tools are closed; and
an actuator configured to move the movable plunger between the engaged position and the disengaged position,
wherein, in the engaged position during foam fill, the movable plunger contacts the protrusion, and the movable plunger and protrusion form a seal at a contact point such that foam is inhibited from flowing between the movable plunger and the protrusion and a bottom of the movable plunger is aligned with the bottom surface of the second tool, and in the disengaged position, at least a portion of the movable plunger extends below the bottom surface of the second tool.