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High-flux array type 3D liquid drop printing method

An array-type, high-throughput technology, applied in the field of 3D printing, can solve problems such as difficulty in ensuring simultaneous shedding and uniform size, damage to the spatial arrangement of droplets, and inability to print droplets, etc., to achieve adjustable printing speed, high-pass The effect of volume preparation and positional disorder

Active Publication Date: 2021-10-22
烟台液秀生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in practice, side-by-side array printheads are not very good at printing droplets in a shear-thinning matrix
There are two main problems: one is that due to the certain viscosity of the hydrogel matrix, the side-by-side array printing nozzles will drive the matrix to move as a whole, destroying the spatial arrangement of the droplets.
The second is that when a single droplet is extruded, a local viscosity gradient will be generated around it. When the droplet array is extruded, a local environment that interferes with each other will be generated. It is difficult to ensure that all droplets fall off from the printing nozzle synchronously and have a uniform size.

Method used

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Examples

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Effect test

Embodiment 1

[0042] Example 1: Preparation of a rectangular prism suspended micro-droplet system composed of arrayed droplets.

[0043] Adopt the method of the present invention to prepare suspension droplet, concrete steps are as follows:

[0044] (1) The circuit that controls the feeding of consumables on the traditional fused deposition 3D printer is connected to the syringe pump control system through the serial interface. Select the nested stainless steel needle tube to prepare a 4×4 array printing nozzle with a period interval of 1.5 mm. The inner tube is a stainless steel hollow capillary tube with an inner diameter of 0.3 mm, an outer diameter of 0.6 mm, and a length of 15 mm. The outer tube is a stainless steel hollow capillary tube with an inner diameter of 1.0 mm. , a stainless steel hollow capillary tube with an outer diameter of 1.1mm and a length of 9mm. The harder outer needle tube provides mechanical support for the softer inner needle tube. The needle tube of the printing...

Embodiment 2

[0051] Example 2: Preparation of star-shaped and circular suspended micro-droplet systems composed of arrayed droplets.

[0052] Adopt the method of the present invention to prepare suspension droplet, concrete steps are as follows:

[0053] (1) A fused deposition 3D printer was used to prepare star-shaped and circular array nozzle molds. The inner tube is a stainless steel hollow capillary tube with an inner diameter of 0.3 mm, an outer diameter of 0.6 mm, and a length of 15 mm. The outer tube is a stainless steel hollow capillary tube with an inner diameter of 1.0 mm, an outer diameter of 1.1 mm, and a length of 9 mm as a nested stainless steel needle tube. , fixed at the round hole of the mold and assembled into star-shaped and circular array nozzles.

[0054] (2) The circuit that controls the feeding of consumables on the traditional fused deposition 3D printer is connected to the syringe pump control system through the serial interface. The needle tube of the printing n...

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Abstract

The invention discloses a high-flux array type 3D liquid drop printing method. In order to solve the problems that when suspension liquid drops are prepared in a point-by-point printing manner, the printing rate is low, and time consumed by production is long, array type spray heads are adopted, and the printing rate of liquid drops can be effectively improved by increasing the number of array capillary needle heads; in the printing process, micro vibration is applied to the array type spray heads, the shearing effect between liquid drops and a hydrogel matrix can be actively regulated and controlled, the hydrogel matrix is kept not damaged, the array liquid drops are synchronously and uniformly extruded out, and high-flux stable printing of the suspension liquid drops is achieved; and by combining the arrangement spacing of array through holes of the spray heads and pattern design, the sizes and spatial positions of the liquid drops can be accurately controlled, optimal arrangement of the liquid drops is realized, the oil / water phase proportion is improved, and a three-dimensional model with a specific shape is prepared according to actual requirements. The method is simple and easy to implement, can be used for batch production, and has wide application prospects in the fields of foods, medicines, cosmetics and the like.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a high-throughput array-type 3D droplet printing method. Background technique [0002] 3D droplet printing is a new printing technology based on the combination of traditional fused deposition 3D printing and microfluidic liquid feeding mechanism. 3D droplet printing can obtain suspended droplets by printing liquid in a shear-thinning matrix, which has shown great potential in material design and product development. Taking cosmetics as an example, 3D printing suspended droplets can precisely control the size and spatial position of the droplets, which provides a broad space for product development and design. [0003] However, 3D printing of suspended liquid droplets faces an important problem, that is, the printing speed is too low. Printing a bottle of product can often take several hours, as each droplet requires the needle to move into place and then extrude the liquid...

Claims

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Application Information

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IPC IPC(8): B29C64/112B29C64/209B33Y10/00B33Y30/00
CPCB29C64/112B29C64/209B33Y10/00B33Y30/00
Inventor 黄秀娟陈莉
Owner 烟台液秀生物科技有限公司
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