Uniform ventilation wall device for cooling three rolls in extrusion process of diffusion plate

Abstract

The invention discloses a uniform ventilation wall device for cooling three rolls in the extrusion process of a diffusion plate. The uniform ventilation wall device comprises a cooling air pipe. The two ends of the cooling air pipe are connected with air compression pumps, a plurality of air holes are formed in the upper wall of the cooling air pipe, and compressed air penetrating through the air holes is vertically upward. The distance between the adjacent air holes is not larger than 5 mm, the cross sectional areas of the air holes are gradually decreased from the air hole in the middle of the cooling air pipe to the air holes in the two ends of the cooling air pipe, and the cross sectional areas of the adjacent air holes differ by 0.0135 mm<2>. The cooling air pipe is eccentrically sleeved with a stainless steel pipe, and the cooling air pipe is close to the upper wall of the stainless steel pipe. The two ends of the stainless steel pipe are sealed, and a cutting opening with the width ranging from 0.30 mm to 0.40 mm is cut in the lower wall of the stainless steel pipe in the axial direction of the stainless steel pipe. A ventilation wall formed by the device is uniform in overall air pressure, and in the extrusion production process of the diffusion plate cooled through the device, the quality defects of warping, roll grain and the like are overcome.

Description

technical field [0001] Embodiments of the present invention relate to the field of diffuser plate processing machinery, and more specifically, embodiments of the present invention relate to a uniform wind wall device for cooling three rolls of diffuser plate extrusion. Background technique [0002] The diffusion plate is one of the core components of the LCD display backlight module, and its quality directly affects the light transmittance, uniformity, shading, and structural stability and firmness of the backlight module. The diffusion plate is made by adding organic / inorganic diffusion particles inside the diffusion plate base material (PS) and adjusting the surface microstructure (double matte surface), so that the LED array point light source is incident on the diffuser particles and the surface microstructure of the diffusion plate. The light is fully scattered and refracted, so as to obtain a soft and uniform surface light source. On the one hand, it must have high li...

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Problems solved by technology

[0004] The present invention overcomes the deficiencies of the prior art, and provides a uniform wind wall device for three-roll cooling of diffuser plate extrusion, in order to solve quality problems such as warping and roll marks that are easy to occur during the production of diffuser plates.

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