Mold-masters (2007) Limited

Engel Austria Gmbh

Mold-master (2007) Limited

Stefan Engleder

Murray Feick

Douglas Brien Ursu

Fabrice Fairy

A method for taking a nozzle of a valve gated runner apparatus includes releasably attaching a valve pin to a movable part of an actuator for moving the valve pin between an open position and a closed position and detaching the valve pin from the actuator by moving the movable part of the actuator towards the open position when the valve pin is immobilized. The valve pin and the movable part valve pin may be releasably attached by a magnetic force. The step of detaching the valve pin from the actuator may be accomplished by overcoming the magnetic force. A valve pin plate can be provided for a plurality of valve pins to be releasably attached to the actuator.

Method of taking a nozzle of a valve gated hot runner apparatus out of service

A magnetic coupling for an injection molding apparatus, such as a hot half or hot runner, includes a first magnetic part for connection to an actuator, a valve pin plate, or the like and a movable second magnetic part for connection to a valve pin. The first magnetic part and the second magnetic part are coupled by a magnetic force. The first magnetic part can be part of the actuator. The second magnetic part can be part of the valve pin. A valve pin plate can be provided for a plurality of valve pins.

Injection molding apparatus having a magnetic valve pin coupling

An injection molding apparatus includes a back plate, a driven pulley connected to the back plate and rotatable with respect to the back plate, a screw connected to the driven pulley to rotate with the driven pulley, a motor having an attached drive pulley, a belt or chain coupling the driven pulley and the drive pulley, a valve pin plate, a nut connected to the valve pin plate and mated with the screw, at least one valve pin connected to the valve pin plate, a manifold fixed with respect to the back plate, and at least one nozzle connected to the manifold. The valve pin extends through the nozzle to control flow of molding material. The screw can be a ball screw and nut can be a ball nut. The screw can have one portion connected to the driven pulley and another portion connected to a mold plate in a rotatable manner. The valve pin plate may be an assembly with an upper plate, a lower plate, and at least one valve pin holder fixed between the upper plate and the lower plate, the valve pin being fastened to the valve pin plate assembly with the valve pin holder. The positions of the screw and nut can be reversed.

Injection molding apparatus with plate actuation of valve pins

Injection molding apparatus having magnetic valve pin coupling

An apparatus for regulating an injection moulding machine comprising a crank lever mechanism for moving the movable mould mounting plate, wherein the crosshead of the crank lever mechanism is driven by a drive device. The regulating apparatus is constructed as a cascade regulator, wherein the follower regulating circuit (inner regulating circuit ()) is a force regulator which compares a force reference value (F) supplied by a guide regulating circuit to a force actual value (F) detected by a force measuring device () at the drive device () and outputs a control parameter or parameters to the drive device (), and wherein the guide regulating circuit (outer regulating circuit ()) is a trajectory follower regulator which in dependence on a stored or generated reference trajectory (x,{dot over (x)},{umlaut over (x)}) for the crosshead ascertains and outputs on the one hand a travel and/or speed actual value (x,{dot over (x)}C) detected by a travel measuring device () at the crosshead () and on the other hand the force reference value (F) for the follower regulating circuit.

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Guelph, Canada

Stefan Engleder