DE2921135A1 - Cutting glass panes which are reinforced by wire inserts - where pane is scored, locally heated to melt wires, and then fractured along score - Google Patents

Abstract

One surface of the glass is scored along the cutting line; and then induction heating is used to melt the wires locally underneath the scored line. A bending load is next applied so the glass fractures along the scored line. When the pane has thick wire inserts, the glass is pref. fractured along the scored line prior to induction heating and melting of the wires. An inductor is pref. moved over the scored line to heat and melt the wires. Used, esp. for cutting glass strip reinforced by wires into suitable lengths.

Description

Process for cutting glass panes with

a wire insert The invention relates to a method for severing of glass panes with a wire insert by cutting along the glass surface a cutting line, separating the wires lying below the cutting line and then Breaking of the superficially cut wire glass pane.

For cutting wire glass panes along a cutting line is it is known to cut the slices superficially with a glass cutter, against the cutting line from the back of the glass to press a lever so that the glass breaks, and then the broken wire glass structure by means of a mechanical vibrator to vibrate until the wire insert breaks through mechanical overstretching.

Because of the cumbersome nature of this procedure, it has already been suggested the exposed wires of the wire insert after cutting the glass, which leads to a gap in the glass surface, to be electrochemically cut. However, the method has the disadvantage that the one to be cut Wire has a relatively large series resistor with a relatively small resistance in the Working gap represents, so that the working flow largely through the inhomogeneous Material properties of the wire insert is determined. The process works here not very reliable.

To improve the properties of the separation points and to avoid them A method of the type specified in the introduction is proposed for their post-processing, which is characterized by the fact that the wires under the interface are inductively heated and be melted.

It is expedient to proceed in such a way that the glass panes after their superficial incision using a glass cutter with their interface be brought into the field of an inducing inductor so that the under the Interface located wires are inductively heated and melted. Thereafter the wired glass can be broken in the usual way.

The method according to the invention can be carried out in the manner that the wires located under the interface are common in their entirety or melted successively one after the other with the inductor moved relatively against the glass pane will.

The attached drawing explains a preferred embodiment of the method according to the invention.

In Fig. 1 is an apparatus for performing the method according to the invention shown schematically in a side view.

Fig. 2 explains the structure of an associated inductor for heating the wire inlays.

In Fig. 1, 1 denotes a pane of glass which is to be cut along a straight line of intersection 2 by means of a Glas schneiders superficially is cut. Those located under the cutting line 2, perpendicular to the cutting line Device 2 extending wire inserts 3 are after the cutting line has been made 2 brought into the high-frequency alternating field of an inductor 4, the inducing, heat conductor 5 through which high-frequency current flows, with its inducing conductor part 6 is arranged parallel to the wires of the wire insert 3. He is given with Speed in the direction of arrow 7 along section line 2 at a close coupling distance transported to the surface of the glass and inductively heats the wire inserts * 3, which are thereby melted.

After the melting process, the back of the glass is along the Cutting line 2 is pressed against a stop that moves the glass along the cutting line breaks.

It has proven to be useful for glasses with thicker wire inlays proved to break the glass before the inductive melting of the wire inserts.

Fig. 2 shows the inductor 4 in a plan view, with 7 the High-frequency power connections of the inductor, with 8 connection nozzles for supply of cooling water to the hollow inductor conductor 5 are designated.

The arrangement for performing the method according to the invention can also be made such that several of the criss-cross wire inserts are heated inductively in the glass body at the same time. Depending on the circumstances and Dimensions of the glass surface to be cut, it is possible to include individual parts or all of the wire inlays at the points to be separated at the same time to melt.

In addition to its simplicity, the method also has the advantage speed and cleanliness. It is preferred for cutting off partial lengths from a wired glass ribbon used.

3 claims 1 drawing Blank page

Claims (3)

Claims 1. A method for cutting glass panes with a Wire insert by cutting into the glass surface along a cutting line, separating of the wires lying below the cutting line and subsequent breaking of the superficial ones cut wire glass pane, characterized in that the wires under the Interface are inductively heated and melted. 2. The method according to claim 1, characterized in that the wire glass pane (i) before the inductive heating and melting of the wires (3) is broken. 3. The method according to claim 1 or 2, characterized in that the wire inlays (3) of the wire glass pane located under the cutting line (2) by means of heated and melted along the cutting line movably mounted inductor (4) will.