Patent ID: 8414813
Filing Date: 2013-04-09
Classification: B29C,B29K

Abstract:
1. A method of making multi-component plastic molded parts, using an apparatus which includes two outer platens with first half-molds, and a middle platen with second half-molds of different types interacting with the first half-molds such as to define cavities in two parting planes for injection of a plastic melt and/or a PUR mixture, the method comprising the steps of: in a first cycle a) closing and locking a first half-mold with a second half-mold of a first type facing the first half-mold to form first cavities in the two parting planes, b) injecting a first plastic melt or PUR mixture into the first cavities and producing preforms in the respective first cavities formed in the two parting planes, c) opening the respective first cavities formed by the first half-molds and the second half-molds of the first type, d) retaining the preforms in the respective first half-molds, in a subsequent cycle e) moving second half-molds of a second type different from the first type into the two parting planes so as to face the respective first half-molds with the retained preforms, f) closing and locking the first half-molds with the facing second half-mold of the second type to form second cavities in the two parting planes, g) injecting a second plastic melt or a PUR mixture into the second cavities and producing overmolded preforms, h) opening the respective second cavities formed by the first half-molds and the second half-molds of the second type, i) retaining the overmolded preforms in the respective first half-molds, and removing an overmolded preform from the respective first half-molds when the overmolded preform represents a finished multi-component plastic molded part.