Patent ID: 6508297
Filing Date: 2003-01-21
Classification: B22C

Abstract:
A mote molding machine comprising:a molding chamber in which a portion of sand is introduced, said chamber bounded by a movable wall having a first pattern plate and an extractor rammer having a second pattern plate, said second pattern plate having at least one deep depression, said first and second pattern plates forming a mote mold from said portion of sand when said portion of sand is compacted between said first and second pattern plates; a support plate positioned between said extractor rammer and said second pattern plate; an ejection plate positioned between said support plate and said second pattern plate and including guide elements associated with said second pattern plate for guiding movement of said ejection plate relative to said second pattern plate, said ejection plate further including at least one hold down plate positioned opposite said at least one deep depression in said second pattern plate for aiding in the compacting of sand in said at least one deep depression; and at least one pneumatic pusher housed in said extractor rammer and attached to said extraction plate for movement of said extraction plate relative to said support plate; wherein said second pattern plate further includes at least one stop for controlling movement of said ejection plate relative to said second pattern plate; wherein during a compacting stroke, said extractor rammer causes said ejection plate to move toward said second pattern plate and said at least one hold down plate to compress said portion of said sand in said at least one deep depression and to form said mote mold in said molding chamber, said compacting stroke occurring until said ejection plate contacts said at least one stop; and wherein during an ejection stroke, said extractor rammer causes said ejection plate to bear against said at least one stop and cause said mote mold to separate from said second pattern plate.