Application method of linear motor in ultrathin float glass production

Abstract

The invention belongs to the technical field of glass production, and relates to an application method of a linear motor in ultrathin float glass production. The application method of the linear motors in the ultrathin float glass production comprises the following steps: symmetrically mounting a pair of linear motors with power matched with the glass production drawing amount at a narrow sectionof a tin bath, wherein the configured power of the linear motor is related to the pulling amount, and the W power is equal to 1 / 4-1 / 5 A of the pulling amount; the two linear motors are located on thetwo sides of the glass plate in the width direction respectively. The front ends of the linear motors extend into the tin bath and are positioned above the glass plate; wherein the extending length Lis equal to KA (1 + delta / 2); the height h between the lower end surface of the linear motor and the glass plate is 1 / 2-1 / 3 of the height of the molten tin bath breast wall; wherein the current of thelinear motor is related to the thickness of the produced glass, and I<motor> = I<basic current>(1 + delta / 3). The application method reduces the temperature difference of the transverse tin liquid, reduces the temperature difference of the glass plate floating on the tin liquid surface, and achieves the balance of the transverse temperature difference of the glass plate.

Description

technical field [0001] The invention belongs to the technical field of glass production, and in particular relates to a method for using a linear motor in the production of ultra-thin float glass. Background technique [0002] In the production process of ultra-thin float glass, especially 1.1mm~0.55 mm electronic glass, the thinner the glass thickness, the greater the thickness difference between the edge and the middle along the width direction of the glass plate, and the greater the lateral temperature difference, resulting in After the ultra-thin glass plate enters the narrow section of the tin bath, an unbalanced temperature drop occurs at the edge and the middle, which causes the internal stress of the glass plate to be unbalanced. This glass deformation caused by permanent stress cannot be completely dissipated after annealing, thus Make ultra-thin glass products produce defects such as optical deformation, warping, and ripples. [0003] The tin liquid in the high te...

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Problems solved by technology

[0002] In the production process of ultra-thin float glass, especially 1.1mm~0.55 mm electronic glass, the thinner the glass thickness, the greater the thickness difference between the edge and the middle along the width direction of the glass plate, and the greater the lateral temperature difference, resulting in After the ultra-thin glass plate enters the narrow section of the tin bath, an unbalanced temperature drop occurs at the edge and the middle, which causes the internal stress of the glass plate to be unbalanced. This glass deformation caused by permanent stress cannot be completely dissipated after annealing, thus Make ultra-thin glass products produce defects such as optical deformation, warping, and ripples

[0003] The tin liquid in the high temperature area of ​​the tin bath flows to the end of the tin bath, and the tin liquid at the colder end flows back to the hot end of the tin bath. The temperature of the molten tin in this area is uneven, and the uneven temperature of the molten tin causes uneven heating of this part of the glass, resulting in stress caused by uneven stretching of the glass ribbon, resulting in defects such as optical deformation, warping, and ripples in the glass product.

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