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CN-224224532-U - Dual-material projection photocuring additive manufacturing equipment

CN224224532UCN 224224532 UCN224224532 UCN 224224532UCN-224224532-U

Abstract

The utility model discloses a dual-material projection photocuring additive manufacturing device which comprises a device body, a DLP projection optical machine, a liftable and rotatable printing platform, a resin tank assembly, a cleaning tank assembly and a linear sliding rail. The resin tank assembly comprises two independent resin tanks, and a compressed air input conduit, a multidirectional air nozzle and a cleaning liquid recovery pipeline are arranged in the cleaning tank assembly. The resin tank and the cleaning tank are both arranged on the linear slide rail, so that the automatic station switching is convenient. Through the rotary spin-drying and spray-drying structure of the platform, the cross contamination of materials is effectively reduced, and the printing precision of the dual materials is improved. The device has compact structure and is suitable for additive manufacturing application of high-precision heterostructures.

Inventors

  • YANG ZHENAN

Assignees

  • 上海聚智纵横科技有限公司

Dates

Publication Date
20260512
Application Date
20250815

Claims (10)

  1. 1. A bi-material projection photo-curing additive manufacturing apparatus, comprising: An equipment body (1); A DLP projection optical machine (2) arranged at the bottom of the equipment body (1); The printing platform (3) is arranged at the top of the equipment body (1) and can be lifted along the vertical direction, the printing platform (3) is driven by a Z-axis linear motor (31), and a platform rotation driving mechanism (32) for high-speed rotation is arranged; The printing device comprises a printing platform (3), a resin tank assembly (4) and a cleaning tank assembly (5) which are arranged below the printing platform (3), wherein the resin tank assembly (4) comprises a resin tank A (41) and a resin tank B (42), the resin tank assembly (4) and the cleaning tank assembly (5) are arranged on a linear sliding rail (6) side by side and used for being switched to the lower part of the printing platform (3) according to the need in the printing process, a compressed air input conduit (51) and a multi-directional air nozzle (52) are arranged in the cleaning tank assembly (5) and used for blowing, cleaning and drying the surface of the printing platform (3), and a cleaning liquid recovery pipeline (53) is further arranged in the cleaning tank assembly (5) and used for replacing cleaning liquid; The device also comprises a main control unit (8) electrically connected with the components and used for controlling the lifting and rotation of the printing platform (3), the switching of the resin tank assembly (4) and the cleaning tank assembly (5) and the execution of the cleaning process.
  2. 2. The apparatus according to claim 1, wherein the stage rotation driving mechanism (32) is configured to drive the printing stage (3) to rotate at a speed of 200 rpm to 1500 rpm before material switching to achieve spin-drying of the residual resin on the stage surface.
  3. 3. The apparatus according to claim 1, wherein the linear slide (6) is adapted to guide the movement of the resin bath assembly (4) and the cleaning bath assembly (5) in a horizontal direction, completing the switching between the printing material station and the cleaning station.
  4. 4. The apparatus according to claim 1, characterized in that the multi-directional air nozzle (52) is connected to the compressed air input conduit (51), the multi-directional air nozzle (52) being arranged at a plurality of positions of the cleaning tank assembly (5) for drying the air jet of the printing table (3) in a plurality of directions.
  5. 5. The device according to claim 1, wherein the main control unit (8) is configured to control the Z-axis linear motor (31) to implement a lifting motion of the printing platform (3), and coordinate timing logic of platform rotation, material switching, and cleaning and drying, so as to implement a continuous dual-material printing process.
  6. 6. The apparatus according to claim 1, wherein the printing platform (3) is connected to a platform rotation driving mechanism (32) by a detachable structure for facilitating maintenance, replacement or adaptation of different shaped printing bearing surfaces.
  7. 7. The apparatus of claim 1, wherein the resin tank a (41) and the resin tank B (42) are of a modular structure of the same size, facilitating replacement, interchange or expansion of the number of tanks according to the use requirements.
  8. 8. The apparatus according to claim 1, characterized in that the cleaning tank assembly (5) is provided with a cleaning liquid viewing window or a liquid level indicating structure for checking the liquid level state of the cleaning liquid in real time.
  9. 9. The apparatus according to claim 1, characterized in that the cleaning liquid recovery conduit (53) is provided with a quick connection interface or valve structure facilitating the implementation of cleaning liquid discharge or replacement operations.
  10. 10. The apparatus according to claim 1, wherein the DLP projector (2) comprises an LED light source assembly and an optical lens assembly, and is mounted in a closed cabin at the bottom of the apparatus body (1) to prevent ambient stray light or dust from interfering with printing accuracy.

Description

Dual-material projection photocuring additive manufacturing equipment Technical Field The utility model relates to the technical field of additive manufacturing equipment, in particular to dual-material projection photo-curing additive manufacturing equipment. Background With the wide application of 3D printing technology in a plurality of fields such as medical treatment, industrial manufacturing, education and scientific research, projection light curing technology (DLP, digital Light Processing) is one of the mainstream technologies in high-precision additive manufacturing due to the advantages of high forming speed, high printing precision, good surface quality and the like. However, the existing DLP 3D printing apparatus generally supports only a single material for molding, and is difficult to meet the complex model printing requirements of functional diversity and structural heterogeneity. In order to solve the problem, some technical schemes attempt to adopt a multi-nozzle or multi-slot switching mode to realize multi-material printing, but the technical schemes have the defects of complex structure, low switching precision, serious material cross contamination and the like. For example, part of the devices rely on platform lifting and tank body replacement in the material switching process, residual mixing is easy to generate in the feeding and discharging and cleaning stages, the quality of a model interface is affected, the existing platform cleaning mode mainly comprises soaking and manual intervention, the efficiency is low, and the degree of automation is insufficient. In addition, in the high-precision printing process, the treatment of resin residual liquid between material switching directly affects the interface quality and interlayer bonding performance of the model, and if no effective cleaning and spin-drying mechanism is provided, the clear and clear separation of a double-material interface is difficult to ensure. Therefore, it is necessary to provide a dual-material DLP printing apparatus with compact structure, high efficiency of material switching, thorough cleaning and drying, and high positioning accuracy, so as to solve the problems of difficult multi-material printing, serious cross contamination and poor structural compatibility in the prior art. Disclosure of utility model In one possible embodiment, the dual-material projection photocuring additive manufacturing equipment comprises an equipment body 1, a DLP projection optical machine 2 arranged at the bottom of the equipment body 1, a printing platform 3 which is arranged at the top of the equipment body 1 and can be lifted in the vertical direction, wherein the printing platform 3 is driven by a Z-axis linear motor 31 and is provided with a platform rotation driving mechanism 32 for high-speed rotation, a resin tank assembly 4 and a cleaning tank assembly 5 which are arranged below the printing platform 3, the resin tank assembly 4 comprises a resin tank A41 and a resin tank B42, the resin tank assembly 4 and the cleaning tank assembly 5 are arranged on a linear sliding rail 6 side by side and are used for being switched to below the printing platform 3 as required in the printing process, a compressed air input conduit 51 and a multi-directional air nozzle 52 are arranged inside the cleaning tank assembly 5 and are used for cleaning and drying the surface of the printing platform 3, the cleaning tank assembly 5 is further provided with a recovery pipeline 53 for replacing cleaning liquid, and the equipment further comprises a main control unit 8 electrically connected with the components and used for controlling the lifting of the printing platform 3, the resin tank assembly 4 and the cleaning tank assembly 5 to perform the cleaning process. In one possible embodiment, the stage rotation driving mechanism 32 is used to drive the printing stage 3 to rotate at a speed of 200 rpm to 1500 rpm before material switching, so as to achieve spin-drying of the residual resin on the surface of the stage. In one possible embodiment, the linear slide 6 is used to guide the resin tank assembly 4 and the cleaning tank assembly 5 to move in the horizontal direction, so as to complete the rapid switching between the printing material station and the cleaning station. In a possible embodiment, the multi-directional air nozzle 52 is connected to the compressed air input conduit 51, and the multi-directional air nozzle 52 is disposed at a plurality of positions of the cleaning tank assembly 5, and is capable of drying the air stream sprayed from a plurality of directions on the printing platform 3. In one possible implementation, the main control unit 8 is configured to control the Z-axis linear motor 31 to implement lifting motion of the printing platform 3, coordinate timing logic of platform rotation, material switching, and cleaning and drying, and implement a continuous dual-material printing process. In one possible embodiment, the pri