Maschinenfabrik Mueller-weingarten Ag

Maschinenfabrik Muller-weingarten Ag

Rolf Frey

Friedrich Stummer

Wolfgang Lutz

Albert Reinhardt

A method and apparatus for injection molding. The injection molding machine includes a mold formed by a fixed mold half and a movable mold half cooperating with the fixed mold half for defining a mold cavity of the mold and a gate channel leading to the mold cavity. An injection piston is operatively associated with the mold cavity for pressing a melt via the gate channel into the mold cavity. A sensor device detects a melt front of the melt rising upstream of the mold cavity in a conveying direction of the melt at a predetermined detection height. The sensor device includes walls defining a measurement gap disposed at the detection height and extending transversely to the conveying direction of the melt. The measurement gap is at least partially penetrated by a fraction of the melt from the melt front when the melt front rises toward the mold cavity. A measuring device operatively associated with the measurement gap is responsive to a presence of the fraction of the melt in the measurement gap without directly contacting the melt and generates a measurement signal for controlling predetermined parameters of the machine.

Pressure diecasting or injection molding machine

A computer implemented method for determining optimized parameter values for a casting process for use with a diecasting machine, including: storing a plurality of known data sets of individual parameters of a casting cycle for a casting process for an optimization program in a die data memory of a die-casting machine control system; transferring automatically each data set of the plurality of known data sets in succession to the die-casting machine control from the die data memory by means of the optimization program, without external manual intervention, and running a preselected number of casting test cycles with each successive data set; testing sample products produced with one data set in the casting test cycles for quality by metallurgical means to provide at least one measured value; assessing quality of the sample products produced with one data set in the casting test cycles employing an automatic quality control operation to identify optimum parameter data sets from the at least one measured value; and using optimum parameter data sets for one series of measured values for the subsequent production of series-produced parts.

Method for the determination of optimum parameters for a casting

A method for the process control of a pressure diecasting machine, consisting of casting equipment (2) and a casting drive system (1), and an apparatus for carrying out the method are proposed. In order to regulate the movements both of the ram or drive plunger (8) in the pressing cylinder (7) and of the multiplier plunger (17) in the multiplier device (15) in each phase of the casting process, stepless devices (30, 31) measuring displacement and speed to determine the position or movements and also quick-adjustment servo-proportional valves (33 to 36) to regulate the movement both of the ram (8) and of the multiplier plunger (17) are provided.

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Winterbach, Germany

Rolf Frey