Patent DE-102011012559-A1 (DE)
Title: Coupling for a tool to an actuator rod of an ejection device for a molding tool in an injection casting machine, comprises a stud bolt in a sleeve-like housing with a locking plunger pressure-loaded to it, and control- and coupling bolts
Inventor: KAEHNY ERNST
IPC: B22D17/20
Filed: 2011-02-26
Abstract: The coupling (1) for a tool to an actuator rod of an ejection device for a molding tool in an injection casting machine, comprises a stud bolt (4) in a sleeve-like housing with a locking plunger (11) pressure-loaded and arranged to it, where the stud bolt connects itself axially to a threaded pin rod (6) lead-out from the housing and the locking plunger is formed with locking unit, and control- and coupling bolts (10) connected with an ejector-/shaping plate bundle of the molding tool and lying-opposite to the locking unit. The control- and coupling bolts are engaged-in with the locking unit. The coupling (1) for a tool to an actuator rod of an ejection device for a molding tool in an injection casting machine, comprises a stud bolt (4) in a sleeve-like housing with a locking plunger (11) pressure-loaded and arranged to it, where the stud bolt connects itself axially to a threaded pin rod (6) lead-out from the housing and the locking plunger is formed with a locking unit, and control- and coupling bolts (10) connected with an ejector-/shaping plate bundle of the molding tool and lying-opposite to the locking unit. The control- and coupling bolts are engaged-in and engaged-out with the locking unit over a contoured head bolt. The control- and coupling bolts and the stud bolt are lockable with one another and against each other in an engagement position in a shear- and tensile-resistant manner. The locking unit is formed as locking pin protruding towards the locking plunger axially in direction to the control- and coupling bolts. The locking pin is assigned to freely pivotably mounted rocker lever, which is formed with a groove recess turned towards the stud bolt and with a contour recess adapted to the bolt head and turned towards the control- and coupling bolts. A pressure spring supported in an end flange of the stud bolt impinges the locking plunger in the direction of the rocker lever. The housing is provided with only a compressed air connection for adjusting the locking plunger against the force of the pressure spring. The threaded pin rod is floatably arranged in a threaded ring screwed in the housing. A cylinder pin concentrically arranged to the stud bolt in the threaded ring engages in an end flange of the threaded pin rod for radial rotation prevention of the threaded ring. The rocker lever mounted on a pin are formed with a ball lock, which is arranged to a ball standing under spring pressure in the rocker lever, where the ball is assigned to trough-like recesses provided in a pivot path of the rocker lever in a reception body. The ball snaps into the recesses during reaching the outwardly pivoted unlocking position of a pivot lever. The locking plunger is aligned with an inner sealing ring against the stud bolt and with an outer sealing ring against the inner surface of a housing chamber receiving it, where further sealing ring is arranged to a disk plugged on the locking bolt of the locking plunger and closed forwardly from a reception.