A thermal insulation pumping device for molten injection molding liquid

Abstract

The invention discloses a heat preservation pumping device for a molten injection molding liquid. The heat preservation pumping device comprises an injection molding heat preservation barrel, a pump,a heat preservation input inner tube and a heating inner barrel, wherein the bottom end of the injection molding heat preservation barrel is connected with a lower cover through screws; the top end ofthe injection molding heat preservation barrel is fixedly connected with an upper cover; the heat preservation input inner tube is vertically mounted in the injection molding heat preservation barrel; a flow guide tube is mounted in the heat preservation input inner tube; a blocking ring is fixed on the inner wall of the heat preservation input inner tube outside the flow guide tube; a flow guidehole is formed in the bottom side of the flow guide tube; the bottom of the flow guide tube is connected with a fixed seat; the bottom of the fixed seat is connected with an ejector rod; the bottom end of the ejector rod is arranged in a buffer sleeve; a spring I is connected to the lower part of the ejector rod in the buffer sleeve; a liquid outlet is formed in the side surface of the heat preservation input inner tube at the upper side of the buffer sleeve; and the heating inner barrel is mounted in the injection molding heat preservation barrel. The heat preservation pumping device can beautomatically started or stopped, prevents the molten injection molding liquid from backflow, has a good heating effect, extrudes out the molten injection molding liquid in an upper injection moldingcavity conveniently, and is convenient to clean, and the heat preservation pumping effect on the molten injection molding liquid is improved.

Description

technical field [0001] The invention relates to the technical field of injection molding equipment, in particular to a thermal insulation pumping device for molten injection molding liquid. Background technique [0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment for making thermoplastic or thermosetting materials into various shapes of plastic products using plastic molding molds. With the acceleration of modernization, injection molding machines have been widely used in various sectors of the national economy such as construction, packaging, electrical appliances, agriculture, automobiles, transportation, light industry, petrochemical industry, machinery industry, national defense industry, and various fields of people's lives. , showing a very important role. The injection molding machine mainly includes parts such as a feeding mechanism, a barrel, a screw, and a nozzle; most of the existing injec...

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Problems solved by technology

The injection molding machine mainly includes parts such as a feeding mechanism, a barrel, a screw, and a nozzle; most of the existing injection molding machines use the barrel and the screw to convey the molten injection liquid, which cannot transport the molten injection liquid well, not only cannot Control the delivery volume of injection molding liquid, and there will be a large amount of heat loss during the transportation process, and even the molten injection molding liquid will solidify, which cannot be heated well to ensure its flow, and it is easy for the molten injection molding liquid to flow back

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