초록 ▼

A method of regulating the hardening or setting time of a plastic mass in a mold of an injection molding machine, wherein during a relative movement between two mold halves in the presence of the pressure of the plastic mass the hardening time of the mass is regulated in the mold cavity as a functio

A method of regulating the hardening or setting time of a plastic mass in a mold of an injection molding machine, wherein during a relative movement between two mold halves in the presence of the pressure of the plastic mass the hardening time of the mass is regulated in the mold cavity as a function of the recuperation or recovery of such relative movement.

대표청구항 ▼

A method of regulating the setting time of a thermosetting plastic mass in a mold of an injection molding machine, which mold is constituted by at least two mold halves defining therebetween a mold parting plane and forming a mold cavity, comprising the steps of injecting a thermosetting plastic mas

A method of regulating the setting time of a thermosetting plastic mass in a mold of an injection molding machine, which mold is constituted by at least two mold halves defining therebetween a mold parting plane and forming a mold cavity, comprising the steps of injecting a thermosetting plastic mass into the mold cavity of the mold, the pressure of the mass in the mold cavity initially causing relative opening movement between the two mold halves, directly sensing the magnitude of a mold gap at the mold parting plane caused by such relative opening movement, and regulating the residence time and therefore the setting time of the thermosetting plastic mass in the mold cavity in response to the sensing of the magnitude of such mold gap and as a function of the recovery of such mold gap due to reclosing of the mold halves caused by the shrinkage of the thermosetting plastic mass as the latter sets.