Graphite mold suitable for electromagnetic heating

Abstract

The invention relates to a graphite mold suitable for electromagnetic heating. The graphite mold comprises an upper mold and a lower mold which are matched with each other, wherein chambers are arranged in the middle of both upper mold and lower mold; an iron-contenting metal sheet is arranged in each chamber; the highest thickness of the iron-contenting metal sheet is 90% of the thickness of each chamber; the chambers of the upper mold and the lower mold are divided into two or four rectangular areas; the area cutting lines in the chambers pass through the central position of the upper mold or lower mold of the mold; the cross section of each iron-contenting metal sheet is of wavy shape; the chambers of the upper mold and the lower mold are arranged as sealing chambers. The graphite mold suitable for electromagnetic heating provided by the invention can heat by adopting an electromagnetic coil; the heating point of the mold is in the mold; the heat consumed by the thermal radiation environment is reduced; the temperature of the mold can be directly increased to the softening temperature of glass; the mold has the advantage of energy conservation.

Description

[0001] Technical field: [0002] The invention belongs to the field of auxiliary equipment in the field of glass processing, and in particular relates to a graphite mold suitable for electromagnetic heating. [0003] Background technique: [0004] The mold improvement in the thermal processing equipment for the outer protective glass of the existing display equipment, most of the display screens of the current new handheld display equipment adopt curved screens on both sides or four-sided curved screens, in order to adapt to the bending of the screen, the protective glass sticker needs The curved surface shape is processed by the hot bending mold, and most of the existing processing methods use the heat radiation emitted by the electric heating tube to heat the mold containing the glass to be processed to the softening temperature of the glass in a sealed space, and use pressure equipment. Press the graphite mold tightly to cool the glass to be processed after it is formed. How...

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Problems solved by technology

[0004] The mold improvement in the thermal processing equipment for the outer protective glass of the existing display equipment, most of the display screens of the current new handheld display equipment adopt curved screens on both sides or four-sided curved screens, in order to adapt to the bending of the screen, the protective glass sticker needs The curved surface shape is processed by the hot bending mold, and most of the existing processing methods use the heat radiation emitted by the electric heating tube to heat the mold containing the glass to be processed to the softening temperature of the glass in a sealed space, and use pressure equipment. Press the graphite mold tightly to cool the glass to be processed after it is formed. However, in the prior art, in order to make the pressure equipment operate normally in the space, it is necessary to continuously pass water to cool the mold during the radiation heating process to ensure the normal fit clearance. , so this heating method consumes a lot of energy, which is not conducive to environmental protection and energy saving

Electromagnetic heating has the advantage of high conversion rate, but since ferrous metals will thermally expand during the heating process, if ferrous metals are placed between the graphite mold and the pressure equipment, the thermal expansion will affect the pressing stroke of the pressure equipment, resulting in die size Unstable, even the graphite mold will be directly pressed and jumped. The prior art has not disclosed the method of using electromagnetic heating for graphite mold to process glass

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