Multi-material ceramic photocuring printing system mechanism and rough blank preparation method

Abstract

The invention discloses a multi-material ceramic photocuring printing system mechanism and a rough blank preparation method. The multi-material ceramic photocuring printing system mechanism comprisesa photocuring printing system, forming equipment, stirring equipment, a clamping mechanism and a slicking device. The stirring equipment on the photocuring printing system works for stirring at the temperature of 30-35 DEG C for 1-2 h, the stirring speed is 60-100 r / min, a one-way stirring manner and a two-way stirring manner are combined, the needed constant and proper working temperature duringa polymerization reaction of photosensitive resin is guaranteed, excessive consumption of physical strength during manual stirring is omitted, the stirring quality of slurry is guaranteed, the slurryis more uniform, the action of extruding the slurry by extruding devices is achieved through a negative-pressure pump, the slurry made of different materials is conveyed by different pipelines, the extruding angle of an extruding device set is adjustable, and the acting positions of the extruding device set and the slicking device are harmonized. A temperature sensor is mounted on one side of a silicone rubber heating ring, both the silicone rubber heating ring and the temperature sensor are connected with a digital readout constant-temperature controller, the temperature of the slurry in a forming pond is at 30-35 DEG C, and the speed of the polymerization reaction of the photosensitive resin and the forming rate of rough blanks are increased.

Description

technical field [0001] The invention relates to the technical field of 3D printing and molding manufacturing, in particular to a multi-material ceramic light-curing printing system mechanism and a rough blank preparation method. Background technique [0002] 3D printing proposes a new thinking mode of layered manufacturing and layer-by-layer superposition molding from the principle of forming, that is, computer-aided design (CAD), computer-aided manufacturing (CAM), computer numerical control (CNC), laser, precision servo drive and New materials and other advanced technologies are integrated, and according to the three-dimensional design model of the workpiece formed on the computer, it is sliced ​​in layers to obtain the two-dimensional contour information of the cross-section of each layer. Under control, layers of molding materials are selectively solidified or cut to form individual cross-sectional profiles, which are superimposed step by step into a three-dimensional wo...

AI Technical Summary

Problems solved by technology

Among the above three molding methods, extrusion molding has a simple principle and is easy to realize, especially suitable for ceramic printing with high solid content, but it is difficult to accurately control the extrusion volume of ceramic paste, and the step effect is obvious, resulting in low surface accuracy. The mechanical properties of the blank are poor, and it is not easy to make complex parts

3D printing does not require support, but there are high requirements for the particle size and fluidity of ceramic powder materials. The mechanical properties of the blank are poor, and post-treatments such as debonding and sintering are required, and the surface quality is not good. High, slightly better than extruded

The disadvantage is that the solid phase content of the ceramic powder in light curing is usually not higher than 50%, resulting in a large shrinkage of the blank after post-treatment such as debonding and sintering

The defects of this patent are: the surface and dimensional accuracy of the product formed by extrusion is limited, the extrusion of the slurry is driven by the air source, and the speed control is not good, resulting in uneven extrusion; at the same time, the pressure of the air source pipeline increases. Loss , will also affect the size of the extrusion volume

The defects of this patent are as follows: in the preparation process of the organic adhesive polyurethane acrylate, the intermediate product - NCO has relatively high toxicity, and there are certain safety hazards; the use of hot isostatic pressing equipment to improve the density of the product increases the processing cost and limits In order to popularize and apply; in the manufacture of rough blanks, the point scanning printing process adopted, such as the moving speed of the light spot is only 1mm / min, which greatly limits the improvement of production efficiency

Images