Method and injection-molding nozzle for producing injection-molded parts from plastic

Abstract

In a method and an injection-molding nozzle for producing injection-molded parts from plastic with an injection mold, the plastic melt in the form of at least one ribbon-like strand of melt is injected through a nozzle slit into a cavity of the injection mold before the injection-molded part is demolded once the plastic melt has solidified. The plastic melt is exposed to heat in the region of the sprue during solidifying in the cavity and the sprue is torn off during demolding of the injection-molded part along the nozzle slit in the region of the sprue as a result of the temperature gradient between the solidified injection-molded part and the plastic melt.

What is claimed is: 
     
         1 . A method for producing injection-molded parts from plastic with an injection mold, wherein the plastic melt in the form of at least one ribbon-like strand of melt is injected through a nozzle slit ( 2 ) into a cavity ( 15 ) of the injection mold-before the injection-molded part is demolded once the plastic melt has solidified, wherein the plastic melt is exposed to heat in the region of the sprue during solidifying in the cavity ( 15 ) and wherein the sprue is torn off during demolding of the injection-molded part along the nozzle slit ( 2 ) in the region of the sprue as a result of the temperature gradient between the solidified injection-molded part and the plastic melt.