1results about How to "Stable working pressure" patented technology

The utility model provides a kind of extrusion screw structure of film blowing machine, including base, the top of base is fixedly installed with conveying cylinder, the top of conveying cylinder is equipped with the feeding hopper being communicated therewith, the discharge port of conveying cylinder is fixedly installed with filter box, the discharge port of filter box is fixedly installed with discharge nozzle, the inside of filter box is provided with filter assembly, the top of base is fixedly installed with motor located conveying cylinder one end, the bottom of filter box is detachably installed with pollution collection box. The filter assembly of being set, make reciprocating rod when being driven to rotate by conveying screw, reciprocating block drives reciprocating rod and its one end scraping strip to reciprocate sliding simultaneously, so that scraping strip removes impurity on the surface of filter plate, effectively reduce the blockage of filter plate due to impurity accumulation, ensure the smooth flow of plastic melt, maintain the stable working pressure of film blowing machine, to improve the quality and stability of blown film.