dlp composite extrusion 3d printer

Abstract

DLP composite extrusion 3D printer, including a base, on which a bottom mold forming module and a part to be printed molding module are arranged, the bottom mold forming module and the extrusion molding module share a stage, the bottom mold forming module and the extrusion molding module The extrusion molding module has a switching mechanism for switching the working surface of the carrier from the bottom molding module to the extrusion molding module. The invention has the advantage of realizing the automatic 3D molding of the hollow structure with complex curved surfaces by using the automatic switching of the two printing modules.

Description

technical field [0001] The invention relates to a 3D printing method and a printer capable of accurately forming a hollow structure with complex curved surfaces. Background technique [0002] With the development of biomanufacturing technology, 3D printing technology has become one of the important methods for tissue and organ repair, transplantation, treatment and research of major diseases. Cornea, atrium, glomerulus, ovary, etc. are all hollow structures with complex curved surfaces. The cornea is used as an example to illustrate. [0003] The shortage of corneal transplant donors is a major challenge in the field of blindness treatment in the world. Among them, there are more than 5 million in my country, and at least 100,000 new cases are added every year. Among them, 94.7% of corneal blind patients can be restored by corneal transplantation. Donations can only sustain 5,000 transplants per month. The serious shortage of donors has led to an increasing number of cornea...

AI Technical Summary

Problems solved by technology

Conventional tissue engineering methods mainly have the following problems: 1. The planar membrane structure, whose variable-curvature surface morphology is difficult to accurately control, can only obtain a planar cornea with a certain light transmittance, and cannot provide any refractive power; in clinical applications, Can only provide light to the patient, but cannot provide clear vision

2. Animal corneal exfoliated cell matrix: It is difficult to completely remove toxic reagents during the preparation process, which has a rejection reaction, and its structure cannot completely match the recipient eyeball, resulting in refractive problems

3. The preparation process is complicated and the cycle is long, it is difficult to customize according to the difference in individual shape, and the comfort is poor

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