CN103214170A - Method for toughening 4.0mm toughened glass - Google Patents

Abstract

The invention discloses a method for toughening a piece of 4.0mm toughened glass. The method comprises the following steps of horizontally placing the glass to be processed onto a roller bed, delivering the glass into a passage-type toughening furnace through the roller bed, sequentially conducting heat treatment on the glass at intervals, and cooling the glass through high-pressure air until the surface temperature of the glass reaches 310 to 330 DEG C; placing the glass into 18 to 25 percent potassium nitrate glycerol solution at the temperature of 150 to 160 DEG C to be cooled for 4 to 5 minutes; reheating the glass to the temperature of 260 to 290 DEG C for 4 to 5 minutes; and taking out the glass to be slowly cooled in the air. Through the interval heating and cold treatment, the stress distribution on the surface of the glass is adjusted, and the flatness of the toughened glass is guaranteed; and through treatment of the potassium nitrate glycerol solution, reheating and slow cooling, the toughened degree of the glass surface is increased, the self cracking possibility of the glass in the cooling process is reduced, the yield of finished product of the toughened glass is increased, and the performance index requirement of the toughened glass can be met.

Description

4.0mm the tempering processing method of toughened glass

Technical field

The invention belongs to the glass preparation field, be specifically related to the preparation technology of toughened glass.

Technical background

Toughened glass makes it be widely used owing to have higher mechanical strength, good heatproof acute degeneration, good advantages such as security.It is the steel process of heat-eliminating medium that existing toughened glass production process adopts mostly with the air, makes to be heated glass and to carry out Quench at short notice by a large amount of air and handle, thereby finishes the tempering process.In order to guarantee the performance of toughened glass, the air of very big flow need be provided in very short time usually, especially more obvious when tempering approaches glass, select for use the high-power blower of high blast, big flow to dry simultaneously usually.

At present the mode of glass tempering also has the chemical tempering mode, and chemically toughened glass intensity and physical toughened glass are approaching, but overlong time, the low and production cost height of efficient.

Summary of the invention

The tempering processing method that the purpose of this invention is to provide a kind of 4.0mm toughened glass, glass surface stress are evenly, sinuousness, fragment, degree of the temper all meet the requirements.

Technical solution of the present invention is as follows:

4.0 the tempering processing method of mm toughened glass is characterized in that may further comprise the steps:

(1), just the bath of glass placing flat is delivered in the channel-type annealing furnace by roller-way to roller-way, heat-treat successively by the interval:

First interval: temperature 250-300 ℃, time 3-4 minute; Second interval: temperature 400-450 ℃, time 4-5 minute; The 3rd interval: temperature 250-300 ℃, time 4-5 minute; The 4th interval: temperature 550-600 ℃, time 3-4 minute; The 5th interval: temperature 650-700 ℃, time 5-6 minute;

(2), adopt high-pressure blast to be cooled to 310-330 ℃ of glass surface temperature;

(3), glass was added 150-160 ℃, the cooling of the saltpetre glycerine solution of 18-25% 4-5 minute;

(4), glass is reheated to 260-290 ℃ time 4-5 minute;

(5), take out in the glass air slow cooling but.

The present invention is by adopting by stages heating, deepfreeze, regulate the glass surface stress distribution, guaranteed the planeness of toughened glass, by the saltpetre glycerine solution, reheat, slow cooling handles, increased the degree of the temper of glass surface, reduce the probability that glass is revealed in process of cooling, improved the yield rate of toughened glass, satisfied the performance index requirement of toughened glass.

Embodiment

4.0 the tempering processing method of mm toughened glass comprises and carries out following steps successively:

(1), just the bath of glass placing flat is delivered in the channel-type annealing furnace by roller-way to roller-way, heat-treat successively by the interval:

First interval: temperature 280-300 ℃, time 3-4 minute; Second interval: temperature 430-450 ℃, time 4-5 minute; The 3rd interval: temperature 280-300 ℃, time 4-5 minute; The 4th interval: temperature 580-600 ℃, time 3-4 minute; The 5th interval: temperature 670-700 ℃, time 5-6 minute;

(2), adopt high-pressure blast to be cooled to 320-330 ℃ of glass surface temperature;

(3), glass was added 150-160 ℃, the cooling of 18% saltpetre glycerine solution 5 minutes;

(4), glass is reheated to 280-290 ℃ soaking time 4-5 minute;

(5), take out in the glass air slow cooling but.

The toughened glass that processes is detected, and its sinuousness reaches 0.8 ‰, 55 of 50 * 50mm internal fragments, conformance with standard; Degree of the temper=3.5N/cm, the self-destruction rate is 1 ~ 3 ‰.

Claims (1)

1.4.0 the tempering processing method of mm toughened glass is characterized in that may further comprise the steps:

(1), just the bath of glass placing flat is delivered in the channel-type annealing furnace by roller-way to roller-way, heat-treat successively by the interval:

First interval: temperature 250-300 ℃, time 3-4 minute; Second interval: temperature 400-450 ℃, time 4-5 minute; The 3rd interval: temperature 250-300 ℃, time 4-5 minute; The 4th interval: temperature 550-600 ℃, time 3-4 minute; The 5th interval: temperature 650-700 ℃, time 5-6 minute;

(2), adopt high-pressure blast to be cooled to 310-330 ℃ of glass surface temperature;

(3), glass was added 150-160 ℃, the cooling of the saltpetre glycerine solution of 18-25% 4-5 minute;

(4), glass is reheated to 260-290 ℃ time 4-5 minute;

(5), take out in the glass air slow cooling but.