DE2921135C3 - Method for cutting glass panes with a wire insert - Google Patents

Description

The invention relates to a method for cutting glass panes with a wire insert Cutting into the glass surface along a cutting line, separating the ones below the cutting line Wires and subsequent breaking of the superficially cut wire glass pane.

To cut wire glass panes along a cutting line, it is known to cut the surface of the panes with a glass cutter, against the cutting line from the rear side. ¹ glass to press a lever so that the glass breaks, and then to set the broken wire glass structure by means of a mechanical vibrator in vibration until the wire insert breaks by mechanical overstretching.

Because of the cumbersome nature of this procedure, it has been suggested to use the exposed wires the wire insert after cutting the glass, which leads to a gap in the glass surface, electrochemically to cut up. However, the method has the disadvantage that the wire to be cut is relatively represents large series resistance with a relatively small resistance in the working gap, so that the Working current is largely determined by the inhomogeneous material properties of the wire insert. The method does not work very reliably.

To improve the properties of the separation points and to avoid their reworking, a Proposed method of the type described in more detail, which is characterized in that the Wires under the interface are inductively heated and melted.

Appropriately, the procedure is as follows,

that the glass slices · after their superficial incision by means of a glass cutter with their Interface to be brought into the field of an inducing inductor so that the under the interface ■ 5 wires are inductively heated and melted. Then the wired glass can be used in the usual way to be broken.

The method according to the invention can be carried out in such a way that the under the crotch point

κι located wires in their entirety together or with the inductor relatively moved against the glass pane are melted successively one after the other.

The 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 schematically in a Side view shown.

F i g. 2 explains the structure of an associated inductor for heating the wire inserts.

In Fig.! 1 denotes a pane of glass that is used for Severing along a straight cutting line 2 is cut superficially by means of a glass cutter. The wire inserts 3, which are located below the cutting line 2 and run perpendicular to the cutting direction 2, become

2ϊ after cutting line 2 into the brought high-frequency alternating field of an inductor 4, the inducing, high-frequency current flowing through it Heating conductor 5 with its inducing conductor part 6 parallel to the wires of the wire insert 3

It is transported at a predetermined speed in the direction of the arrow 7 along the cutting line 2 at a close coupling distance to the surface of the glass and inductively heats the wire inserts 3, which are thereby melted.

Ji After the melting process, the back of the Glass along the cutting line 2 against a stop

pressed, which breaks the glass along the cutting line.

For glasses with thicker wire inlays, this is the case

Occasionally proven to be useful to break the glass before the inductive melting of the wire inlays.

Fig. 2 shows the inductor 4 in a plan view, with 7 the high-frequency power connections of the inductor, with 8 connecting pieces for the supply of Cooling water for 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 and crosswise wire inlays

5C can be inductively heated in the glass body at the same time. Ever Depending on the conditions and dimensions of the glass surface to be cut, it is possible to create individual To melt parts or all of the wire inserts at the points to be separated at the same time.

In addition to its simplicity, the process also has the advantage of speed and cleanliness on. It is preferably used for cutting off partial lengths from a wire glass ribbon.

1 sheet of drawings

Claims (3)

Patent claims: 1. Method for cutting glass panes with a wire insert by cutting the Glass surface along a cutting line, separating the wires below the cutting line and subsequent breaking of the superficially cut wire glass pane, characterized in that 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 (1) before inductive heating and melting of the wires (3) is broken. 3. The method according to claim 1 or 2, characterized in that the under the cutting line (2) located wire inserts (3) of the wire glass pane by means of movably mounted along the cutting line Inductors (4) are heated and melted.