Method for moulding a flush profiled bead on a glazing member and moulding device for said method

Abstract

The invention relates to a method for moulding a profiled bead on the edge of a window (1), in which a plastic material constituting said profiled bead is introduced into a moulding cavity (2), said moulding cavity (2) being delimited partly by said window (1) and partly by walls of a mould (3) comprising at least a fixed mould part (30) and a movable mould part (32) that is movable relative to the fixed mould part (30), said mould parts cooperating in the closed state of the mould with said window (1) to form said moulding cavity (2), said moulding cavity (2) comprising a contact between a part of the mould (30, 32) and a rim (14) of said window (2) and a part of the mould (30, 32) comprising at least one seal (4) situated close to said contact and outside said moulding cavity (2), said seal (4), when viewed in cross section, having a total width (1) that is in contact with said window (1) when said mould (3) is closed and a total thickness (e), characterised in that said seal (4) has, when said mould (3) is open, a ratio of width (l) to thickness (e) of between 1.5 and 25.0, including these values, or indeed of between 2.0 and 25.0, including these values, or indeed between 4.0 and 25.0, including these values.

Description

technical field [0001] The invention relates to the field of insert injection molding of components in order to produce glazing. [0002] The invention relates more particularly to the formation of glazing, and especially vehicle glazing, by insert injection molding on the edges of windows to produce profiles. [0003] The present invention relates more particularly to a method and a device for molding a profiled strip at the edge of a window, in which method the plastic material forming said profiled strip is introduced into a molding cavity by injection, said mold The cavity is delimited partly by the window and partly by the walls of the mould, the mold comprising at least: a fixed mold part and a movable mold part movable relative to the fixed mold part, when the mold is in a closed state, the mold part and the said window cooperates to form said molding cavity, said molding cavity comprising contact between a mold part and an edge corner of said window; and a mold part c...

AI Technical Summary

Problems solved by technology

This method and this device have significant disadvantages, namely, often need to carry out the redressing operation manually by the operator, because the outer skin of profiled strip then often presents defects in the area corresponding to the presence of the seal in the molding cavity, thereby increasing manufacturing cost

[0007] attached figure 1 The method and apparatus shown in make it possible to avoid this reworking operation, but are not entirely satisfactory since pressurized injection into the molding cavity often breaks the window, especially when the window is a laminated window

[0008] In particular, the unavoidable contact between the mold parts, usually made of metal alloys, and the window can sometimes crack the window

Images