CN101948236A

CN101948236A - Corner glass piece toughening treatment process

Info

Publication number: CN101948236A
Application number: CN2010102720193A
Authority: CN
Inventors: 廖仲明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-01
Filing date: 2010-09-01
Publication date: 2011-01-19

Abstract

The invention discloses a corner glass piece toughening treatment process, which comprises the following steps of: heating a glass plate, and shaping by using a corresponding mold; and blowing air to two sides of the formed glass product by using a blowpipe in a corresponding shape to make the glass product immediately cooled to room temperature, and adjusting the aperture of nozzles at a corner and the distance between the nozzles to make the cooling speed of the internal and external bent parts at the corner of the glass consistent with that of the plane part. Through the process, corner glass with a bent angle of 90 degrees or more than 90 degrees and small bend degree R can be subjected to toughening treatment, the forming precision of finished products is high, the appearance quality of the products is excellent, the finished product ratio is high and the granularity is uniform.

Description

Corner type glass workpiece tempering treatment process

Technical field

The present invention relates to the manufacture method of glasswork, especially a kind of corner type glass workpiece tempering treatment process.

Background technology

Toughened glass is since coming out the sixties, because its strength ratio simple glass is high 4～5 times, even be subjected to bigger bump, only can be whole cracked and not broken hurting sb.'s feelings, therefore be subjected to very much people's welcome, now be used widely at the cladding glass of furniture, vehicle glass and floor.

The glass bending tempering technology exists already, at first sheet glass is passed through even heating (electrically heated in stove, blowing hot wind) make glass softening to 4000～5000 ℃, by conducting oneself with dignity or adding squeeze glass bending is become desired shape, dry to glass surface simultaneously by the top and bottom blowing mouth of equal angle of bend then, cooling evenly and rapidly, the surface tension increase reaches the tempering purpose; Glass tempering processing requirement relatively strictness especially must be very even with the blowing cooling, and cooling rate is uneven to produce explosion otherwise can consolidate, so glass tempering treatment process product are suitable for making flat glass or the bigger glass of sinuousness; Existing at present horizontal curved, vertical curved, the curved several hot annealing furnace products of mould, but horizontal curved, the curved steel that vertical curved annealing furnace is done camber glass is no problem; Reach or, reach unanimity at angle of bend, therefore be difficult to accomplish the tempering processing of angle of bend greater than the corner glass of 90 degree owing to be difficult to the speed of cooling of its place, corner position of control and planar section greater than the corner glassy products of 90 degree; Also to reach 90 degree crooked though mould is curved, but crooked corner R is bigger than normal, if must make the smaller product of corner R, then nook stress is excessive, be easy to damage, and yield rate is low, especially severe be that granularity is inhomogeneous behind the tempering, self-destruction rate height (surpassing 2%) does not reach European Union's technological standard.All there is not ripe solution at present at home and abroad.

Summary of the invention

The object of the present invention is to provide a kind of can the processing bent angle 90 degree or spend the corner type glass workpiece tempering treatment process of the corner glass that sinuousness R is little by tempering greater than 90.

For achieving the above object, the technical solution adopted in the present invention is:

A kind of corner type glass workpiece tempering treatment process, its step that adopts is as follows:

A) sheet glass is sent in the pot arch, by many heater air flow pressure switch rods in the pot arch sheet glass is heated, well heater is located at the upper and lower surface of sheet glass, and glass sheet support moves back and forth on running roller, reach design temperature, with the sheet glass hot bending die chamber of coming out of the stove;

B) it is indoor that sheet glass arrives mould, on the predefined curved point of sheet glass heating tube is set sheet glass is carried out local heating, and it is softening to make bending glass sheet place local temperature rapidly increase to glass;

C) soften to when suitable when sheet glass prebuckling point, the pressing plate on prebuckling point presses down, and running roller is being carried glass secretly and is being bent downwardly 90 degree or more; Push rod is close on the point of inflection simultaneously, makes corner perfect more;

D) after bending glass sheet was finished, push rod withdrawed from, and pendulum returns originally on the pressing plate, and running roller is motionless;

E) top and bottom blowing pipe carry, this blowpipe is provided with a plurality of nozzles, by the size of adjustment nook nozzle bore and the spacing between nozzle, makes the speed of cooling of the inside and outside crooked position in place, glass corner position consistent with the speed of cooling at position, plane; The jet size at place, corner position and spacing are different and different with the size and the selected sheet thickness of corner angle; The nozzle diameter at excurvation curved surface place should be smaller, and spacing becomes big, and is opposite; The diameter of the nozzle at interior flexure plane place should be greatly, and spacing should be smaller; The whole gently pendulum that is discharged into again of blowpipe is to prevent to produce the wind spot.

Preferably, the temperature of described steps A is 400～500 degrees centigrade.

Preferably, the heating tube of described step B is a far-infrared heating tube.

Preferably, described running roller is ceramic running roller.

After the present invention adopts aforesaid method,, make the speed of cooling of the inside and outside crooked position in place, glass corner position consistent with the speed of cooling at position, plane by the size of adjustment nook nozzle bore and the spacing between nozzle; The jet size at place, corner position and spacing are different and different with the size and the selected sheet thickness of corner angle, because the excurvation curved surface rapid heat dissipation at place, corner position, and the heat radiation of interior flexure plane is slow; Therefore, the nozzle diameter at excurvation curved surface place should be smaller, and spacing becomes big, and is opposite; The diameter of the nozzle at interior flexure plane place should be greatly, and spacing should be smaller; So can guarantee that the nook is consistent with planar portions position speed of cooling, make the whole glass workpiece can both the even tempering of stress, avoided glass workpiece nook stress excessive, be easy to damage, and yield rate is low, especially severe be that granularity is inhomogeneous behind the tempering, the problem that the self-destruction rate is high.

Description of drawings

Fig. 1 is process treatment process figure of the present invention.

Among the figure: 1 pot arch, 11 well heaters, 12,23 pressing plates, mould chambers 2,21 heating tubes, 22 pressing plates, 24 push rods, 3 sheet glass, 4 blowpipes, 41 nozzles.

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:

Shown in Figure 1, corner type glass workpiece tempering treatment process of the present invention, its step that adopts is as follows: A) sheet glass 3 is sent in the pot arch 1, heat by the 11 pairs of sheet glass 3 of many heater air flow pressure switch rods in the pot arch 1, well heater 11 is located at the upper and lower surface of sheet glass 3, sheet glass 3 reaches design temperature by moving back and forth on running roller 12, with the sheet glass 3 hot bending die chamber 2 of coming out of the stove; B) sheet glass 3 arrives in the mould chamber 2, on sheet glass 3 predefined curved points 21 pairs of sheet glass of one or more far-infrared heating tube 3 is set and carries out local heating, and it is softening to make sheet glass 3 knee local temperatures rapidly increase to glass; C) soften to when suitable when sheet glass 3 prebucklings point, the pressing plate 22 on prebuckling point presses down, and running roller 23 is being carried glass secretly and is being bent downwardly 90 degree or more; Push rod 24 is close on the point of inflection simultaneously, makes corner perfect more; D) after sheet glass 3 bendings were finished, push rod 24 withdrawed from, and pendulum returns originally on the pressing plate 22, and running roller 23 is motionless; E) top and bottom blowing pipe 4 carries, this blowpipe 4 is provided with a plurality of nozzles 41, and the spacing that size by adjusting nozzle 41 apertures, nook and nozzle are 41 makes the speed of cooling of the inside and outside crooked position in place, sheet glass 3 corner positions consistent with the speed of cooling at position, plane; Nozzle 41 sizes at place, corner position and spacing are different and different with the size and selected sheet glass 3 thickness of corner angle, need further experiment to determine at last; Nozzle 41 diameters at excurvation curved surface place should be smaller, and spacing becomes big, and are opposite; The diameter of the nozzle 41 at interior flexure plane place should be greatly, and spacing should be smaller; The blowpipe 4 whole gently pendulum that are discharged into again are to prevent to produce the wind spot.Above-mentioned running roller 12,23 is ceramic running roller.

After adopting treatment process of the present invention, solved 90 degree or spent the problem of little R corner glass tempering greater than 90, the technological difficulties of corner type glass tempering have thoroughly been solved, corner toughened glass product shaping precision height, product appearance good quality, yield rate height, epigranular reaches European Union's technological standard fully.

Claims

1. a corner type glass workpiece tempering treatment process is characterized in that comprising the steps:

A) sheet glass (3) is sent in the pot arch (1), by the many heater air flow pressure switch rods (11) in the pot arch (1) sheet glass (3) is heated, well heater (11) is located at the upper and lower surface of sheet glass (3), sheet glass (3) is supported on the running roller (12) and moves back and forth, reach design temperature, with sheet glass (3) the hot bending die chamber (2) of coming out of the stove;

B) sheet glass (3) arrives in the mould chamber (2), on the predefined curved point of sheet glass (3) heating tube (21) is set sheet glass (3) is carried out local heating, and it is softening to make sheet glass (3) knee local temperature rapidly increase to glass;

C) soften to when suitable when sheet glass (3) prebuckling point, the pressing plate on prebuckling point (22) presses down, and running roller (23) is being carried glass secretly and is being bent downwardly 90 degree or more; Push rod (24) is close on the point of inflection simultaneously;

D) after sheet glass (3) bending was finished, push rod (24) withdrawed from, and pressing plate (22) is gone up pendulum and returned originally, and running roller (23) is motionless;

E) top and bottom blowing pipe (4) carry, this blowpipe (4) is provided with a plurality of nozzles (41), by the size in adjustment nook nozzle (41) aperture and the spacing between nozzle (41), make the speed of cooling at excurvation four positions in the place, sheet glass (3) corner position consistent with the speed of cooling at position, plane; Nozzle (41) size at place, corner position and spacing are different and different with the size and selected sheet glass (3) thickness of corner angle; Nozzle (41) diameter at excurvation curved surface place should be smaller, and spacing becomes big, and is opposite; The diameter of the nozzle (41) at interior flexure plane place should be greatly, and spacing should be smaller; The whole gently pendulum that is discharged into again of blowpipe (4).

2. corner type glass workpiece tempering treatment process according to claim 1, it is characterized in that: the temperature of described steps A is 400～500 degrees centigrade.

3. corner type glass workpiece tempering treatment process according to claim 1 is characterized in that: the heating tube of described step B (21) is a far-infrared heating tube.

4. corner type glass workpiece tempering treatment process according to claim 1 is characterized in that: described running roller (23) is ceramic running roller.