Device and method for trimming a float glass strip that has a normal or structured surface

Patent metadata

Field	Value
Publication number	US-9169150-B2
Application number	US-201214005968-A
Country	US
Kind code	B2
Filing date	Apr 2, 2012
Priority date	Apr 6, 2011
Publication date	Oct 27, 2015
Grant date	Oct 27, 2015

Abstract

The invention relates to a device and a method for trimming a float glass strip that has a normal or structured surface, comprising the following features: a) a cutting slide having a lower running rail and a cutting slide having an upper running rail for a bottom cut for a structured surface or a top cut for a normal surface, wherein both running rails are arranged at an acute angle to the running direction of the glass strip and this angled position can be adjusted; b) a number of counter pressure rollers for the lower cutting slide; c) a hold-down apparatus ( 6 ) having a breaking roller ( 20 ) and a front hold-down roller ( 21 ) for a bottom cut; d) a hold-down apparatus ( 15 ) having a breaking roller ( 14 ) and a rear hold-down roller ( 18 ) for a top cut; e) apparatuses ( 10, 11, 12 ) for measuring the advance speed of the glass strip ( 11 ) and the current length of the glass strip.

First claim

The invention claimed is:

1. A device for cutting to length a float glass strip having a normal or structured surface, having the following features:
a) i) a lower cutting carriage ( 4 ) having a lower running rail ( 3 ) below a plurality of conveying rollers ( 2 ) adapted for supporting a glass strip ( 11 ), said lower cutting carriage ( 4 ) for making an undercut in the case of a structured surface, and
ii) an upper cutting carriage ( 7 ) having an upper running rail ( 5 ) above the plurality of conveying rollers ( 2 ), said upper cutting carriage 7 for making an overcut in the case of a normal surface, wherein the lower and upper running rails ( 3 , 5 ) are arranged obliquely at acute angles in relation to the conveying direction of the glass strip ( 11 ) and each inclination is adjustable,

b) a number of counterpressure rollers ( 8 ) above the conveying rollers, adapted to oppose a force exerted by the lower cutting carriage ( 4 ) when making an undercut in the glass strip ( 11 ),
c) a first hold-down unit ( 6 ) having a first fracture roller ( 20 ) and a front hold-down roller ( 21 ) for breaking the glass strip ( 11 ) along an undercut produced by the lower cutting carriage ( 4 ),
d) a second hold-down unit ( 15 ) having a second fracture roller ( 14 ) and a rear hold-down roller ( 18 ) for an overcut produced by the upper cutting carriage ( 7 ), and
e) units ( 10 , 11 , 12 ) for measuring the advancing speed of the glass strip ( 11 ) and its current length.

2. The device as claimed in claim 1 , wherein pressure wheels ( 8 , 18 , 21 ) which come into contact with the structured surface of a glass strip ( 11 ) are inflatable, wherein an air pressure of the pressure wheels is ( 8 , 18 , 21 ) automatically adjusted to the depth of the roughness of the structure.

3. The device as claimed in claim 1 , wherein the adjustment of the inclination of the lower and upper running rails ( 3 , 5 ) takes place depending on the advancing speed of the glass strip ( 11 ).

4. The device as claimed in claim 1 , wherein the hold-down unit ( 6 ) and/or the fracture roller ( 14 ) and/or the hold-down unit ( 15 ) in each case have position adjustments ( 22 , 19 , 16 ) which are adjusted depending on a thickness of the glass strip ( 11 ) and/or the composition of the molten glass and/or the type of structure of the surface of the glass strip ( 11 ) as parameters.

5. The device as claimed in claim 4 , wherein the mentioned parameters in part or collectively are detected by corresponding sensors of a measuring bridge positioned upstream of the upper and lower running rails ( 5 , 3 ) and by means of set point values, which are based on experience values or calculated values, are used for the automatic fine adjustment.

6. The device as claimed in claim 1 , wherein the counterpressure rollers ( 8 ) are configured in the manner of pneumatic vehicle tires, the air pressure being automatically adjusted to the depth of the roughness of the structure.

7. The device as claimed in claim 1 , further comprising a measuring unit ( 12 ) for detecting whether the glass strip ( 11 ) is structured or unstructured, wherein (A) when the glass strip ( 11 ) is structured, the lower cutting carriage ( 4 ) and the first hold-down unit ( 6 ) is activated, and (B) when the glass strip ( 11 ) is unstructured, the upper cutting carriage ( 7 ) and the second hold-down unit ( 15 ) are activated.

8. The device as claimed in claim 1 , wherein each inclination is independently adjustable.

Assignees

• Niewiera Wolfgang
• Grenzebach Maschb Gmbh

Inventors

• Niewiera Wolfgang

Classifications

• H10F77/707

  of the substrates or of layers on substrates, e.g. textured ITO layer on a glass substrate · CPC title

• C03B33/0235 Primary

  Ribbons · CPC title

• C03B33/03 Primary

  Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations · CPC title

• C03B33/033

  Apparatus for opening score lines in glass sheets · CPC title

• C03B33/037

  Controlling or regulating · CPC title