A kind of sheet forming die and sheet forming method

Abstract

The invention belongs to the technical field of plastic processing, and relates to an air cooled thin plate forming die and a method for forming a thin plate. The die comprises an upper die and a lower die, an upper hot pressboard and a lower hot pressboard are respectively fixedly connected with an upper template and a lower template; an upper heating tube and a lower heating tube are provided in the upper hot pressboard and the lower hot pressboard; blowing pipes are respectively provided in an blowing thermal insulation board and a lower blowing thermal insulation board, the upper thermal insulation board and the lower blowing thermal insulation board are respectively connected with a swing connecting rod, the initial point of the swing positions is positioned right above the upper hot pressboard and the lower hot pressboard, the terminal point positions are the positions that the upper blowing thermal insulation board and the lower blowing thermal insulation board are completely moved off the initial point, an upper ultrathin checkered plate and a lower ultrathin checkered plate are respectively connected with an upper checkered plate suspension frame and a lower checkered plate suspension frame, the upper ultrathin checkered plate is positioned right above a plastic plate and the lower ultrathin checkered plate is positioned right under the plastic plate. the method for molding the thin plate comprises: drawing the blowing thermal insulation boards, carrying out low-pressure mould matching to a template for heating and fusing a blank rubber sheet; carrying out high pressure mould matching after the blank rubber sheet is heated and fused, forming the product through the checkered plate; opening the template after molding, inserting the blowing thermal insulation boards and cooling the checkered plates and the product.

Description

technical field [0001] The invention belongs to the technical field of plastic processing, and relates to an air-cooled thin plate forming mold and a thin plate forming method. This technology adopts rapid cooling and rapid heating thin plate hot pressing process, which is characterized by cheap processing equipment, fast processing cycle, and can process extra large patterned rubber sheets, such as light guide plates and diffuser plates for LCD TVs. Background technique [0002] Now the thin plates processed in the market, such as small-sized light guide plates and diffuser plates, are mainly formed by injection molding, but for large-sized patterned thin plates, due to the limited flow length of injection molding, hot pressure molding is mainly used, and because Due to the product quality requirements that there should be no watermark on the surface of the product, and that water can only enter through the side, steam heating and water cooling processes and equipment are r...

AI Technical Summary

Problems solved by technology

[0002] Now the thin plates processed in the market, such as small-sized light guide plates and diffuser plates, are mainly formed by injection molding, but for large-sized patterned thin plates, due to the limited flow length of injection molding, hot pressure molding is mainly used, and because The product quality requirements that there should be no watermark on the surface of the product, and the reason that water can only enter through the side, require steam heating and water cooling processes and equipment; and such rapid cooling and rapid heating equipment are more expensive

Since the mold needs to be heated and cooled as a whole, and the volume of this type of mold is often relatively large, it needs a long time of heating and cooling to complete a processing cycle, so the processing cycle is long, therefore, the processing cost is high, and the product is relatively expensive

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