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, aspray head arranged at the bottom of the stock bin and a heating module; and the heating module is used for forming heating areas for heating the ultra-high molecular weight polymer in the stock binin the vertical direction of the stock bin, the temperatures of the heating areas are gradually increased from the top of the stock bin to one side of the bottom of the stock bin, and the heating areas are sequentially divided into a first heating area, a second heating area and a third heating area from the top of the stock bin to one side of the bottom of the stock bin. The invention provides the rapid forming device and system for the ultra-high molecular weight polymer and the control method of the rapid forming system. The ultra-high molecular weight polymer is heated to a molten state and subjected to extrusion molding, the rapid forming device and system and the control method have the advantages of being large in adaptive temperature interval span, high in environmental adaptability, capable of saving materials, flexible and variable in printing molding structure and the like; and in addition, by arranging the heating areas in gradient changing, expansion deformation of the ultra-high molecular weight polymer in the molten state is avoided.

Description

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

AI Technical Summary

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.

[0010] Therefore, it is necessary to improve the deficiencies and defects of the prior art, provide a rapid prototyping device, system and control method for ultra-high molecular weight polymers, and use high-temperature melting to heat ultra-high molecular weight polymers to a molten state And extrusion molding, it has the characteristics of large span of temperature range, strong adaptability to the environment, material saving, and flexible and changeable printing structure. The problem of polymer swelling and deformation, which cannot be extruded

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