초록 ▼

An automated method for controlling the amount of charge introduced in a mold having a mold cavity and associated overflow assembly by adjusting the amount of charge introduced into the mold cavity in subsequent moldings using a measurement of the amount of excess charge material received by the ove

An automated method for controlling the amount of charge introduced in a mold having a mold cavity and associated overflow assembly by adjusting the amount of charge introduced into the mold cavity in subsequent moldings using a measurement of the amount of excess charge material received by the overflow assembly. The charge is formed so that the fibers therein are randomly oriented in substantially parallel horizontal planes such that they are always substantially parallel to the direction of initial flow into the cavity of the molding unit. Excess charge from the cavity is forced into the charge overflow unit, which is selectively located in an area where surface finish is less critical. The excess charge displaces an overflow pin, which is kept upwardly biased, under molding pressure, to be flush with the lower inside wall of the molding unit cavity. The pin displacement is measured by a sensing transducer. The measurement data is sent to a microprocessor, which progressively sends adjustment signals to the charge forming unit, so that the size of the subsequently cut strips can be efficiently determined.

대표청구항 ▼

[ What is claimed is:] [1.] A method for controlling the amount of charge introduced in a mold having a mold cavity comprising:introducing a first charge of material into said mold cavity;displacing excess charge material from said mold cavity into an overflow assembly;measuring the amount of said e

[ What is claimed is:] [1.] A method for controlling the amount of charge introduced in a mold having a mold cavity comprising:introducing a first charge of material into said mold cavity;displacing excess charge material from said mold cavity into an overflow assembly;measuring the amount of said excess charge material received by said overflow assembly with a sensing device;generating an adjustment signal as a function of said amount of said excess charge material measured by said sensing device; andsending said adjustment signal to a processing device wherein said processing device uses said adjustment signal to adjust an amount of charge material subsequently introduced into the mold.