Method for producing blackboard and whiteboard made from enamel in super strength, and glaze of enamel

A technology for enamel glaze and a manufacturing method, applied in the field of stationery, can solve the problems of inability to ensure dimensional stability, thermal deformation of thin steel plates, brittle and toughness of enamel, etc., and achieve the effects of strong hardness, low cost and good adhesion effect.

Inactive Publication Date: 2004-08-11
王强
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Problems solved by technology

Therefore, the problem is that the enamel film on the thin steel plate will cause a large degree of thermal deformation of the thin steel plate when it is fired, and the stability of the required size of the pr

Method used

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  • Method for producing blackboard and whiteboard made from enamel in super strength, and glaze of enamel
  • Method for producing blackboard and whiteboard made from enamel in super strength, and glaze of enamel

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[0011] Examples:

[0012] In the present invention, the enameling temperature of the base glaze and the top glaze should differ by more than 80°C. Because the process of enamel enameling is the process of melting and releasing. If the enamel firing temperature of the base glaze and the top glaze is too low, it is easy to produce pinholes and bubbles when the top glaze is fired.

[0013] 1. Bottom glaze manufacturing and enameling process

[0014] Weigh the chemical raw materials according to the formula listed in Figure 1, and pulverize and mix them thoroughly. When the heating temperature of the rotary furnace reaches 1200°C, the mixture is poured into the furnace, and the furnace body continues to be heated, rotated and stirred. The mixture is fully reacted and melted to form a melt. After wire drawing, knot testing, bending, etc., the molten material is poured into cold water and cooled to form a crushed glass-like crystal, which is the base glaze raw material.

[0015] In addi...

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Abstract

A process for preparing the super-strength enamelled black (or white) board includes such steps as praying the priming enamel, sintering at 680-740 deg.c for 3 min, spraying surficial enamel and sintering at 560-640 deg.C for 3-4 min. Its enamel contains Al2O3, B2O3, CaF2, Na2O or Li2O, BaO or PbO or CaO, and SiO2 or TiO2. Its advantages are super strength and high antiwear performance.

Description

Technical field: [0001] The invention relates to the technical field of stationery, in particular to a method for manufacturing super-strength enamel blackboards and whiteboards and enamel glazes. Background technique: [0002] At present, the teaching blackboards used in domestic education circles are generally glass frosted blackboards. This kind of glass blackboards has unsolvable defects such as large dust, high reflectivity, and easy breakage. In addition, resin blackboards and metal magnetic blackboards that have been used in recent years have solved the defects of glass blackboards, but because the board surface uses organic coatings, the abrasion resistance of the board surface is poor, which affects the service life of the blackboard. This is also a waste of resources. Chinese Patent No.: 98112246 discloses a patent of invention entitled "Magnetic Resin Composite Sheet and Clean Blackboard Manufacturing Method", which is exactly a kind of resin blackboard. In rece...

Claims

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Application Information

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IPC IPC(8): B43L1/06C03C8/06C03C8/22C04B28/02
CPCC03C8/06C04B28/02
Inventor 王强熊天英
Owner 王强
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