Fluid raw material feeding and preheating device for production and processing of injection molding machine

Abstract

The invention belongs to the technical field of preheating equipment, and discloses a fluid raw material feeding and preheating device for production and processing of an injection molding machine. The fluid raw material feeding and preheating device comprises a feeding pipe, wherein the outer surface of the feeding pipe is fixedly sleeved with a heat preservation pipe, the inner surface of the feeding pipe is fixedly connected with a fixing rod, and the inner end of the fixing rod is fixedly connected with an inner pipe. A flowing liquid raw material exchanges heat with the inner pipe from the inside, flowing heat exchange air is poured into the heat preservation pipe through a fixed pipe, waste heat air obtained after heat exchange is fed into the heat preservation pipe to conduct heat preservation treatment on the outer side of the feeding pipe, efficient preheating and temperature rising of the liquid raw material are achieved from the inside, the radiation distance in the actual radiation heat exchange process is reduced, heat attenuation waste is reduced, efficient preheating and temperature rising are achieved, meanwhile, waste heat is effectively utilized for conducting heat preservation treatment on the feeding pipe, efficient utilization of heat emitted by the heating pipe is improved, the preheating effect of liquid raw materials is greatly improved, the later machining effect of the injection molding machine is improved, and the use effect is good.

Description

technical field [0001] The invention belongs to the technical field of preheating equipment, in particular to a fluid raw material feeding and preheating device for injection molding machine production and processing. Background technique [0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using plastic molding molds. Divided into vertical, horizontal, all-electric. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and make it inject and fill the mold cavity. The liquid raw material of the injection molding machine needs to maintain a certain amount of heat during the transportation process. Usually, preheating equipment is used to preheat the feed pipe. [0003] The existing fluid raw material feeding and preheating device for injection molding machine produ...

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Problems solved by technology

[0003] The existing fluid raw material feeding and preheating device for injection molding machine production and processing usually adopts the method of preheating the insulation sleeve to wrap the feed pipe outside, and the feeding is realized by installing a heating pipe in the insulation sleeve. The temperature rise on the outside of the tube radiates to the inside through heat, and finally realizes the preheating of the raw material when the feeding tube is fed, increasing the heat of the liquid raw material entering. However, in actual use, the heating position of the heating tube is located outside the feeding tube, and the external air Compared with the temperature, the internal heat transfer effect of the actual circulating liquid raw material is poor, and the heat exchange time between the liquid raw material and the fixed external heat source is short during the flow process, and the relative heat transfer is small, which makes the preheating effect poor and the use effect is not good.

[0004] On the other hand, in the existing fluid raw material feeding and preheating device for injection molding machine production and processing, during preheating, the liquid in the inner and outer layers is relatively stable during the flow of the liquid raw material, and the central part and the outer liquid raw material usually flow according to a stable trajectory. The uniformity of heat exchange with the heat source is poor, and the liquid raw material that flows in at low temperature and is preheated has a certain viscosity with the inner wall of the feeding pipe, which makes the flow rate of the liquid and the raw material decay greatly during the flow process, and the actual feeding effect is not good. Affects the feeding effect of raw materials, and the relatively viscous liquid is far away, which makes the free-flowing agitation and mixing effect worse. The effect of preheating the inner and outer layers of the actual liquid raw materials is significantly different, and the use effect is not good.

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