Die-pressing membrane filter plate and molding method thereof

Abstract

The invention relates to a die-pressing membrane filter plate made by directly molding a membrane on a filter plate core surface by die pressing and a molding method. The die-pressing membrane filter plate comprises two filter plate cores arranged in a double-mold frame, wherein degradable mold cores are arranged on tympanic membrane faces of the filter plate cores; plastic balls are arranged on the tympanic membrane faces of the two filter plate cores; and then, left and right molds are combined with a middle mold, and after cooling, two single-sided plastic membrane filter plates are obtained; the two single-sided plastic membrane filter plates are turned over and placed into the double-mold frame; degradable mold cores are arranged on the tympanic membrane faces of the filter plate cores; the plastic balls are arranged on the faces of the tympanic membrane faces of the filter plate cores; and the left and right molds are combined with the middle mold, and after cooling two double-sided plastic membrane filter plates are obtained.

Description

technical field [0001] The invention relates to a molded diaphragm filter plate in which a diaphragm is directly molded on the core surface of the filter plate and a molding method, belonging to the field of diaphragm filter plate manufacturing. Background technique [0002] 1. Injection molding process of filter plate core: the patent number is 200410037113.5, the name is "new plastic filter plate core or plate forming process", the new plastic filter plate core or plate forming process, hot runner plastic filter plate core forming mold or hot runner plate The hot runner opening of the forming mold is located on the upper or bottom or side of the hot runner plastic filter plate core forming mold or the hot runner plate forming mold. The outlet of the injection molding mechanism of the injection molding machine is aligned with the hot runner opening, and the plastic raw material is heated and plasticized by the injection molding mechanism. Finally, the discharge port is inje...

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Problems solved by technology

Although the above two patents have made detailed descriptions on the structure and manufacturing process of the filter plate core and the diaphragm, as well as the assembly structure and assembly process between the diaphragm and the filter plate core, the cooperation between the filter plate core and the embedded diaphragm must be Use CNC machine tools to process slots and chamfers; second, the assembly size between the diaphragm and the filter plate core requires high precision, high processing costs, and time-consuming labor. Even so, when the diaphragm and the filter plate core are assembled, due to other Influenced by many factors such as material, temperature, process, and processing accuracy, it is difficult to achieve precise assembly between the diaphragm and the filter plate core, which directly affects the quality stability of the product; third, in addition to the injection-molded diaphragm, the existing diaphragm is affected by Due to the limitation of the tolerance of the heating, melting and pressing of the diaphragm and the filter plate core, the cavity thickness of the diaphragm cannot be consistent, which makes the space of the diaphragm filter cavity different in size, and it is easy to cause unequal pressure difference between the filter chambers, breakage of the diaphragm filter plate core, and The lifespan is shortened; the fourth is that the current flat structure diaphragm, when the material in the filter chamber is not full, especially when the tympanic membrane is squeezed when it is rare, it will be ruptured due to excessive stretching of the membrane; fifth, the diaphragm is formed by injection molding, and the diaphragm itself The density does not meet the requirements, and bubbles and cavities are easily generated inside the diaphragm, which directly affects the yield and service life of the diaphragm

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