Plastic inspection well seat hot runner cascade type sequential injection molding device and machining method

Abstract

The invention discloses a plastic inspection well seat hot runner cascade type sequential injection molding device which comprises a mold core fixing plate, a fixed mold plate bottom plate and a mold cavity fixing plate, the mold cavity fixing plate is connected with a control system, the upper end of the mold cavity fixing plate is fixedly connected with the fixed mold plate bottom plate, and the lower end of the mold cavity fixing plate is arranged on the surface of the mold core fixing plate in a matched mode; the mold core fixing plate is fixedly connected with the mold core plate, multiple layers of pressure and temperature sensors are arranged on the inner wall of the mold core plate, the mold cavity plate is arranged outside the mold core plate, a forming cavity is reserved between the mold core plate and the mold cavity plate, and the mold cavity plate and the mold cavity fixing plate are clamped and fixed. A plurality of outer side sub-runners are arranged on the periphery of the mold cavity plate, outer side sub-runner main runner holes are formed in the outer side sub-runners, the problems that cold joints are generated in the injection molding process of an injection molding device, and plastic solution filling is insufficient can be solved, the distribution direction of polymer fibers is improved, and the consistency of the distribution direction of the fibers is kept.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to a plastic inspection well seat hot runner cascade sequential injection molding device and a processing method thereof. Background technique [0002] Large-scale plastic inspection wells are generally composed of cylindrical well covers, well chambers and well bases. Among them, the well base is composed of well base base and outer support holes (the number of support holes is more than 1), and the mass of the well base is tens to hundreds of kilograms. The outer diameter is 1-1.5 meters, and the height is 1-2 meters. The well base needs to bear the pressure load of the vehicles on the road and the earthwork around the well base. The compressive strength, service life and product quality of the well base have high requirements. Injection molding Molding is its main processing method. Due to the large size and complex structure of the well block and injection mold, there ...

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Problems solved by technology

[0002] Large-scale plastic inspection wells are generally composed of cylindrical well covers, well chambers and well bases. Among them, the well base is composed of well base base and outer support holes (the number of support holes is more than 1), and the mass of the well base is tens to hundreds of kilograms. The outer diameter is 1-1.5 meters, and the height is 1-2 meters. The well base needs to bear the pressure load of the vehicles on the road and the earthwork around the well base. The compressive strength, service life and product quality of the well base have high requirements. Injection molding Molding is its main processing method. Due to the large size and complex structure of the well block and injection mold, there are key technical problems that are difficult to overcome in injection molding: 1. It is impossible to effectively eliminate the formation of relatively large plastic melt during the long-distance flow of the mold cavity. Larger and longer cold joints, which greatly reduce the compressive strength and tensile strength of the inspection well; 2. The irregular and disorderly formation of plastic melt in the mold cavity The distribution direction of polymer fibers has a great influence on product quality and service life

Chinese Patent Application No. ZL201710086676.0 "Plastic Inspection Well Block Injection Mold Laminated Hot Runner Pouring Device", this invention reduces the flow distance of the melt in the mold cavity, which is conducive to the rapid filling of the mold cavity with the plastic melt, but , this patent is similar to the patent application number CN202111057637.0 "A Large-Scale Plastic Inspection Well Storage Type Hot Runner Injection Molding Device". The hot runner gates of the two injection molds are injected at the same time. The outflowing plastic melt forms irregular and chaotic polymer fiber distribution directions in the flow of the mold cavity, which has a great impact on product quality and service life; and the distance between the gates is large, the melt flowing out from each gate The temperature of the frontal cold front is low, and a large number of cold seams are easily formed on the frontal cold front of the melt

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