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US5580587: Mold changing device in injection molding machine


Filing Information

Inventor(s) Heinz Leonhartsberger · Friedrich Kuhberger · Franz Peirlberger ·
Assignee(s) Engel Maschinenbau Gesellschaft m.b.H. ·
Attorney/Agent(s) Wenderoth, Lind & Ponack ·
Primary Examiner Timothy McMahon ·
Application Number US8233969
Filing date 04/28/1994
Issue date 12/03/1996
Predicted expiration date 04/28/2014
U.S. Classifications 425/183  · 425/185  ·
International Classifications B29C 300  ·
Kind CodeA
International Classifications 425183;185;186;190;195;575 ·
Foreign Priority AT82993 - 04/28/1993 ·
20 Claims, No Drawings


A rubber injection molding machine includes a mold rack, an injection position with lower and upper platens and an operator station. Rolling beams are mounted at opposite sides of the injection position and can be lifted and lowered. Between such beams is a mold carrier which can be moved in the rolling direction of the beams. The mold carrier grasps a clamping pin of a bottom half of the mold.

Independent Claims | See all claims (20)

  1. 1. A vertical injection molding machine having a mold changing device, said machine comprising:an injection station having thereat lower and upper platens to hold therebetween a mold for an injection molding operation;an operator station at a first side of said injection station;a mold storage rack at a second side of said injection station opposite said operator station;a slide plate mounted on said lower platen for movement relative thereto in opposite directions back and forth between said injection station and said operator station during normal molding operations and for selective movement back and forth from said injection station toward said mold storage rack during a mold changing operation;rolling beams mounted on opposite sides of said slide plate for vertical movement between a lowered position, whereat a mold at said injection station is maintained lowered relative to said lower platen, and an upper position, whereat a mold at said injection station is lifted by said rolling beams away from said lower platen; anda mold carrier connected to said slide plate and movable therewith to, when said rolling beams are in said upper position, move a mold lifted by said rolling beams in a direction from said injection station toward said mold storage rack and to move a new mold in a reverse direction, with the molds being rollingly moved along said rolling beams.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US5004413 Manesty Machines Limited Stopforth Apr 1991
US5232716 Kurata Corporation Seto et al. Aug 1993
US5256053 Kabushiki Kaisha Mitsuishi Fukai Tekkosho Haguchi Oct 1993
US5356279 Hemscheidt Maschinentechnik Schwerin GmbH & Co. Fuller et al. Oct 1994
US5358398 GenCorp Inc. Brown et al. Oct 1994
US5362434 Laeis- Bucher GmbH Hauser et al. Nov 1994
US5401157 NOK CORP Kato et al. Mar 1995
US5401158 NISSEI PLASTICS IND CO Kubota et al. Mar 1995

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE3801032KERMI GMBHJul 1989