Microwave hot bending kiln and microwave heating hot bending glass ceramic preparing method

A technology of glass-ceramics and microwave, which is applied in glass molding, glass re-shaping, glass manufacturing equipment, etc., can solve the problems of uneven temperature distribution in the furnace, unstable heat source distribution, long time consumption, etc., and shorten the heating time , the overall quality improvement, and the effect of improving the crystallization efficiency

Pending Publication Date: 2018-07-27
四川一名微晶科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes 6 to 8 hours to complete the hot bending, which takes a long time
On the other hand, due to the unstable distribution of the heat source and the difference in the structure

Method used

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  • Microwave hot bending kiln and microwave heating hot bending glass ceramic preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Hot bending glass-ceramic annealing plate

[0022] Place a glass annealed plate with a specification of 1050mm*1050mm*10mm on a curved body with a diameter of 800mm for hot bending; control the microwave output power to heat the plate to 760°C after 10 minutes, and then keep the plate temperature at 755°C~ Between 765°C, last for 40 minutes, and perform hot bending. After the hot bending is completed, the plate is cooled to 620°C after 10 minutes, kept at a temperature of 5 minutes, and cooled to room temperature after 80 minutes to obtain a glass-ceramic hot bent plate.

[0023] According to the statistics of the process, the production time of the microwave bending kiln of the same specification is reduced from 5 hours and 20 minutes to 2 hours and 30 minutes for one bending production compared with the ordinary heating kiln. Prepare 1m 2 The unit energy consumption of the hot-bending sheet is reduced from 4.8kw*h to 1.65kw*h. Reduce energy consumption up to 66%...

Embodiment 2

[0025] 2. Hot-bent glass-ceramic crystallization plate

[0026] Place a glass crystallization plate with a specification of 1050mm*1050mm*8mm on a curved body with a diameter of 800mm for hot bending; control the microwave output power to heat the plate to 820°C after 15 minutes, and then keep the plate temperature at 815°C ~825℃, last for 40min, and carry out hot bending. After the hot bending is completed, the plate is cooled to 630°C after 10 minutes, kept for 5 minutes, and cooled to room temperature after 80 minutes to obtain a glass-ceramic hot bent plate.

[0027] According to the statistics of the process, the production time of the microwave bending kiln of the same specification is reduced from 5 hours and 20 minutes to 2 hours and 30 minutes for one bending production compared with the ordinary heating kiln. Prepare 1m 2 The unit energy consumption of the hot-bending sheet is reduced from 5.6kw*h to 1.8kw*h. Reduce energy consumption up to 68%.

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Abstract

The invention discloses a microwave heating hot bending glass ceramic preparing method. The m microwave heating hot bending glass ceramic preparing method comprises placing a polished glass ceramic plate in the center of a curved green body, pushing a drawer kiln until the drawer kiln is tightly connected with a main kiln, starting a power supply, adjusting the microwave frequency to 2450 megahertz, and controlling the power of every microwave generator to be 6 kw-8 kw; increasing the temperature of a sample for 10-15 min to 780-850 DEG C; under the power condition of 4 kw-8 kw, heat-preserving the sample at 780-850 DEG C for 30-40 min for hot bending; after hot bending is completed, cooling the sample for 10-15 min until reaching an annealing temperature of 650 DEG C, performing thermal preservation, and then rapidly cooling down the sample for 60-80 min to room temperature. The invention also discloses a microwave hot bending kiln. The microwave heating hot bending glass ceramic preparing method and the microwave hot bending kiln can greatly shorten the heat increasing time, improve the crystallization efficiency and reduce the defective percentage.

Description

technical field [0001] The invention relates to a preparation device and method for glass-ceramic, in particular to a microwave hot-bending kiln and a method for preparing hot-bending glass-ceramic by using microwave heating. Background technique [0002] Microwave heating technology is that the dielectric material generates dielectric polarization under the action of microwave electromagnetic field (energy form). During the polarization process, the polar molecules change from the original random distribution state to the polar arrangement orientation according to the electromagnetic field. Due to the fast changing frequency of the electromagnetic field, the orientation of polar molecules is constantly changing. However, the change frequency of the molecular orientation cannot keep up with the change frequency of the electromagnetic field, causing the polarization intensity vector to lag behind the intensity vector of the electromagnetic field to generate a certain micro-cu...

Claims

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Application Information

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IPC IPC(8): C03B23/023
CPCC03B23/023Y02P40/57
Inventor 秦小平秦刚熊冰峰楼贤春姜小元王刚琳
Owner 四川一名微晶科技股份有限公司
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