3D printing variable supporting stock bin based on photopolymerization

Abstract

The invention discloses a 3D printing variable supporting stock bin based on photopolymerization. The 3D printing variable supporting stock bin comprises a closed-loop feedback type self-adaptive liquid level balancing device, a liquid storage device, a sedimentation device and a double-shaft torsion device. The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing variable supporting stock bin based on photopolymerization. Through the rotatable workbench, the angle of a model in the printing process can be changed, then the model which should be transversely arranged originally is changed to be longitudinally arranged or inclined, the model can be supported by the model which is printed previously, and then the processes of printing and cleaning additional supporting structures are avoided to a great extent; the printing efficiency, the post-processing efficiency and the surface flatness of the model are greatly improved; in order to dynamically adjust the height of the liquid level at an extremely high response speed, the invention provides a closed-loop feedback type self-adaptive liquid level balancing device, and the technical effect of self-adaptively adjusting the height of the liquid level is achieved only through an ingenious mechanical structure under the condition that no sensor and no electric control module exist.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and specifically refers to a 3D printing variable support bin based on photopolymerization. Background technique [0002] 3D printing, also known as additive molding technology, is a technology that generates a three-dimensional physical model through layered printing. At present, there are three main types of raw materials for 3D printing: roll-packed consumables mainly composed of ABS plastics, and resin-based materials. Liquid consumables and metal-based powder consumables. [0003] Among them, liquid consumables such as resin are mainly formed into solid state by UV light irradiation and curing. This technology is also called photopolymerization. Generally, the rotatable laser head is used to control the irradiation trajectory of light. The depth of polymerization is mainly affected by the intensity of light, The influence of irradiation time and irradiation distance; both the illuminati...

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Problems solved by technology

[0003] Among them, liquid consumables such as resin are mainly formed into solid state by UV light irradiation and curing. This technology is also called photopolymerization. Generally, the rotatable laser head is used to control the irradiation trajectory of light. The depth of polymerization is mainly affected by the intensity of light, The influence of irradiation time and irradiation distance; both the illumination intensity and irradiation time can be preset in the system. In contrast, the height of the liquid level will change during the printing process, resulting in fluctuations in the irradiation distance. If it is not adjusted Detection and adjustment are very likely to affect the accuracy and quality of the product. If the liquid level is adjusted according to the current commonly used method of controlling the liquid inlet pump after sensor sensing, it will take a certain amount of time for the pump to start and stabilize, which will greatly affect the feedback adjustment. efficiency

[0004] The current 3D printing adopts the method of printing layer by layer from bottom to top, and the printed model of the lower layer is used as the support of the upper layer. However, if the model has a cantilever or even a drooping structure, it is generally necessary to pre-print the support structure, and then in the post-processing stage. Removal and grinding, not only affects efficiency, but also affects product size and appearance

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