Production method for polypropylene septum

Abstract

The invention relates to a method for preparing a polypropylene diaphragm, namely injection molding. The method comprises the following steps: polypropylene materials are placed into a charging basket of a stirring and drying apparatus, and the temperature is set to be 70 DEG C for dry treatment; after being dried, the polypropylene materials are placed into a screw heating tank of an injection molding machine, and the temperature on both ends of the heating tank is set to be 220 DEG C and the intermediate temperature of the heating tank is set to be 270 DEG C, so that the polypropylene materials are molten; the propelling pressure in a back pressure parameter of a screw cylinder of the injection molding machine is set to be 8.0 MPa, and the molten polypropylene materials are injected into a cavity of a die; and the materials are pressurized for 8 to 19 minutes at the propelling pressure of the cavity of the die, taken out and placed into a forming machine for forming twice, and then taken out. The method shortens the production cycle of the polypropylene diaphragm, saves the energy, reduces the cost, and improves the production efficiency.

Description

technical field [0001] The invention relates to a polypropylene diaphragm filter plate. [0002] The present invention also relates to a method for preparing the diaphragm in the above-mentioned polypropylene diaphragm filter plate. Background technique [0003] Polypropylene diaphragm filter plate is the main filter element on the filter press in the solid-liquid separation industry. The filter cake filtered by the filter press is pressed through the diaphragm chamber of the diaphragm filter plate by high-pressure air or high-pressure water to remove the residue in the filter cake. Filtrate to achieve the effect of filtration. The diaphragm is the main component of the diaphragm filter plate. At present, the diaphragm of the polypropylene diaphragm filter plate produced by various manufacturers is molded by a flat fluidizer. Because the thickness of the polypropylene diaphragm is very thin, and The area of ​​the polypropylene diaphragm is large, and it takes 1-1.5 hours to...

AI Technical Summary

Problems solved by technology

[0003] Polypropylene diaphragm filter plate is the main filter element on the filter press in the solid-liquid separation industry. The filter cake filtered by the filter press is pressed through the diaphragm chamber of the diaphragm filter plate by high-pressure air or high-pressure water to remove the residue in the filter cake. Filtrate to achieve the effect of filtration. The diaphragm is the main component of the diaphragm filter plate. At present, the diaphragm of the polypropylene diaphragm filter plate produced by various manufacturers is molded by a flat fluidizer. Because the thickness of the polypropylene diaphragm is very thin, and The area of ​​the polypropylene diaphragm is large, and it takes 1-1.5 hours to mold a piece of polypropylene diaphragm. The thickness of the polypropylene diaphragm molded with a flat fluidizer is not uniform, and the low yield affects the product quality. Therefore, it is difficult to make a diaphragm filter plate. The cost increases, the production efficiency is low and energy is wasted, which increases the labor intensity of workers, thus affecting production