Rapid forming device and system for ultra-high molecular weight polymer and control method of rapid forming system

Abstract

The invention discloses a rapid forming device and system for an ultra-high molecular weight polymer and a control method of the rapid forming system. The rapid forming device comprises a stock bin, afeeding rod, a heating module, an auxiliary heating device and a rolling assembly; a cavity used for containing the ultra-high molecular weight polymer is formed in the stock bin, the feeding rod ismatched with the stock bin and reciprocates in the stock bin in the axial direction of the feeding rod, one end of the feeding rod faces one side of a spray head, and the ultra-high molecular weight polymer in the stock bin is extruded out of the spray head; the heating module forms a heating area of which the temperature is gradually increased from the top of the stock bin to one side of the spray head at the bottom; the auxiliary heating device is used for carrying out secondary heating on the ultra-high molecular weight polymer extruded by the spray head; and the rolling assembly is used for compacting the ultra-high molecular weight polymer extruded by the spray head. According to the rapid forming device and system for the ultra-high molecular weight polymer and the control method ofthe rapid forming system, the ultra-high molecular weight polymer is heated to be in a molten state and subjected to extrusion forming, the adaptive temperature interval span is large, and the environmental adaptability is high.

Description

technical field [0001] The invention belongs to the technical field of polymer material molding, and in particular relates to a rapid prototyping device, system and control method for ultra-high molecular weight polymers. Background technique [0002] 3D printing is a popular concept and a kind of rapid prototyping technology, which was born in the late 1980s. This technology integrates mechanical engineering, material engineering, numerical control technology, laser technology and other technologies, and uses the material accumulation method to manufacture the prototype of parts. The principle is to first model with computer-aided design (CAD) or computer animation modeling software to form a digital model, then decompose the three-dimensional model into two-dimensional cross-sections layer by layer, and accumulate and solidify the printing materials layer by layer through the software and numerical control system. Create physical products. The mainstream methods include ...

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Problems solved by technology

In addition, the fluidity of the polymer in the molten state is extremely poor, the relative position between the particles changes little, there are a lot of pores inside the molded part, and the density is low, which seriously affects the molding quality

[0006] Second, the processing temperature range of ultra-high molecular weight polymers is narrow, and it is more sensitive to laser energy density and sintering position temperature

[0009] Although the above-mentioned prior art has proposed a rapid prototyping method for ultra-high molecular weight polymers, there are still many problems in practical applications. For rapid prototyping, the laser of this method can only provide a temperature difference of 20-30 degrees, and cannot print materials with a large temperature difference. At the same time, the way of powder laying wastes too much material, and in most cases, new and old powders are mixed, which is harmful to molding The quality of the workpiece is affected. In addition, the method of laser sintering powder bed has strict requirements on the ambient temperature, and it needs to be printed in a greenhouse or a closed space, and the method of powder laying cannot print closed structures, and the application occasions are limited.

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