Three-dimensional printer and printing method and three-dimensional printing head

A three-dimensional printer and three-dimensional printing technology, which is applied in the printing field of printers, can solve the problems of not very smooth surface of printed objects, uneven shrinkage of molded objects, warping of three-dimensional printed objects, etc. Effect

Active Publication Date: 2015-09-02
PRINT RITE UNICORN IMAGE PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a 3D printer using ABS material requires the heating temperature of the print head to reach 220°C, while a 3D printer using PLA material requires the heating temperature of the print head to reach 205°C, which requires a lot of heat to melt the material, resulting in overheating. A lot of energy is wasted, and the temperature of the print head is too high and it is easy to cause burns
In addition, when the 3D printer extrudes an object, the printing speed is very slow because the high-temperature molten wire needs to be gradually cooled and solidified.
In addition, due to the wire drawing effect produced by the printing wire on the surface of the printed object, the surface of the printed object will not be very smooth
Moreover, for objects molded by high-temperature molten materials, there are internal stresses caused by molecular orientation and temperature difference inside the object, which leads to uneven shrinkage of the molded object and large dimensional deviation, which eventually causes warping and deformation of the 3D printed object And other issues

Method used

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  • Three-dimensional printer and printing method and three-dimensional printing head
  • Three-dimensional printer and printing method and three-dimensional printing head

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0027] The three-dimensional printing head of this embodiment includes a material volume chamber 10 , a screw 20 , a motor 30 , a feeding device 40 , a printing nozzle 50 , a heater 60 , a supercritical fluid supply system 70 and a flow control device 80 .

[0028] The screw 20 is arranged inside the material volume chamber 10 , and the diameter of the screw 20 is slightly smaller than the inner wall of the material volume chamber 10 . There is a motor 30 at the upper end of the screw 20, and the motor 30 can drive the screw 20 to rotate clockwise or counterclockwise. A feeding device 40 is arranged on the right side of the upstream area of ​​the material volume chamber 10, and the feeding device 40 communicates with the material volume chamber 10, and the operator or robot adds powdery or fragmented polylactic acid to the feeding device 40 (PLA) material. A printing nozzle 50 is detachably arranged at the lower end of the material volume chamber 10 . Between the feeding dev...

no. 2 example

[0031] The three-dimensional printing head of this embodiment includes a material volume chamber 100, a screw 200, a motor 300, a feeding device 400, a printing nozzle 500, a heater, a supercritical fluid supply system 700, and a flow control device 800. The structural features and connections of these components The relationship has been described in detail in the first embodiment and will not be repeated here.

[0032]The three-dimensional printing head of this embodiment further includes a control system 900 , and a density sensor 510 is provided at a position adjacent to the printing nozzle 500 . A temperature sensor 110 is provided at a position where the connecting pipe 710 of the supercritical fluid supply system 700 communicates with the material volume chamber 100 . The control system 900 is electrically connected to the fluid supply system 700 , the density sensor 510 , the flow control device 800 , and the temperature sensor 110 .

[0033] The density value of the ...

no. 3 example

[0036] The three-dimensional printer of this embodiment includes a material volume chamber, the screw is arranged in the material volume chamber, the motor is connected to the screw, the feeding device is connected to the material volume chamber, the printing nozzle is arranged at the end of the material volume chamber, and the printing platform is used to accept the For the molten material produced by the printing nozzle, the heater is arranged on the material volume chamber, and is located between the feeding device and the printing nozzle, and the supercritical fluid supply system communicates with the material volume chamber.

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Abstract

The invention relates to a three-dimensional printer, a three-dimensional printing head and a printing method. The three-dimensional printing head comprises a material volume cavity, wherein a screw rod is arranged in the material volume cavity, a motor is connected with the screw rod, a material supply device is communicated with the material volume cavity, a printing nozzle is arranged on the end part of the material volume cavity, a heater is arranged on the material volume cavity and positioned between the material supply device and the printing nozzle, and a supercritical fluid supply system is communicated with the material volume cavity. A molten printing material is mixed with supercritical fluid to generate a single-phase molten mixture under the mixing and stirring effect of the screw rod, and a uniform microporous bubble formation effect is formed, so that the density value of a printing object can be reduced, the size deviation of the three-dimensional printing object can be alleviated, the flatness and straightness of the three-dimensional printing object can be improved by more than 50 percent, the temperature for printing the molten printing material is effectively lowered, the energy is saved, and the operation personnel is prevented from being scalded.

Description

technical field [0001] The invention belongs to the field of three-dimensional printers, and in particular relates to a three-dimensional printer for three-dimensional molding by screw extrusion, a three-dimensional printing head and a printing method of the printer. Background technique [0002] Rapid prototyping technology can be used in the forming process of three-dimensional (3D) printing to realize the manufacture of three-dimensional objects through the conversion process of computer data. Generally, 3D printing rapid prototyping technologies mainly include three types: Stereolithography, Laminated Object Manufacturing and Selective Deposition Modeling (SDM). Fused deposition modeling (FDM) is a technical process belonging to selective deposition modeling (SDM). At this stage, FDM 3D printers usually use thermoplastic polymer materials to be extruded from the printing nozzle in a molten state, solidified to form a thin layer of contour shape, and then stacked layer b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00B33Y30/00
Inventor 宋道权
Owner PRINT RITE UNICORN IMAGE PROD CO LTD
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