Netstal-maschinen Ag

Hans Leuzinger

Rudolf Krebser

Caspar Egger

The spraying equipment is arranged at a station provided with means for opening and closing the die, e.g. at a preheating station of a plastic injection molding installation. The equipment comprises a spray arm with nozzles, movable, e.g. hydraulically in horizontal and vertical directions, which arm is connected to a spray medium supply. This supply as well as the drive of the spray arm, is automatically controlled via the computer of the injection molding installation in such a way that with the die open, the spray arm is automatically moved into operating position between the die parts and is manufactured in accordance with the tool data picked up by the computer. After completion of the spraying the arm is retracted into an inoperative position outside the die. Operating personnel is superfluous.

Equipment for spraying the mold surfaces of multi-part dies

An injection molding machine assembly for use with an operating injection machine comprises a tool unit mounting support adjacent the injection machine, a plasticizer and ejection unit mounting support adjacent the mounting support for the tool unit. Each support has associated with it a coupling element for connecting the associated tool unit or plasticizer and ejector into an operative condition or into a standby heating condition, for example. In addition there is a magazine which has at least one additional support for either or both of a tool unit and an ejection and plasticizing unit. An ejector and plasticizer is advantageously provided on a mounting support as well as in a magazine support. In addition a tool unit is provided on the mounting support or in the magazine support. A transport unit is associated with the magazine and tool in the ejector mountings and is movable between them for transporting one or both of a plasticizer and ejector or a tool unit to the mounting support in the operating position as desired. The construction advantageously includes a control for automatically effecting the transportation and the coupling of the units in the operating position adjacent the injection molding machine.

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Netstal, Switzerland

Hans Leuzinger