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Print head and 3D printer

A technology of 3D printers and print heads, which is applied in processing and manufacturing, manufacturing tools, additive manufacturing, etc., can solve problems affecting printing quality and printing nozzle printing, and achieve the effect of improving printing quality

Active Publication Date: 2017-02-01
PRINT RITE UNICORN IMAGE PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the printing process, due to the feeding inertia of the feeding device 05, the above-mentioned printing head continues to supply filaments to the heater 061 after stopping printing. Under the action of the filament thrust, the molding material in a molten state continues to be extruded from the printing nozzle 062 , dripping on the target molded part, affecting the printing quality; in addition, the molding material remaining in the printing nozzle 062 after stopping printing will drip on the molded part with the movement of the printing head, affecting the printing quality
[0006] For a multi-color print head integrating multiple print nozzles, during the printing process, when changing from one print nozzle to another print nozzle, the molding material remaining in the stopped print nozzle will drip with the movement of the print head Falling on the molded parts will affect the printing of the printing nozzles in working state and affect the printing quality

Method used

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  • Print head and 3D printer
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  • Print head and 3D printer

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] See Figure 3 to Figure 4 The print head is composed of a feeding device 15, a heater 161, a cooling device 17, a printing nozzle 162 and a shut-off valve. The shut-off valve is an electronic pressure switch 181 arranged in the discharge pipe of the printing nozzle 162.

[0037] See image 3 When the printing nozzle 162 is in the printing state, the controller of the 3D printer controls the electronic pressure switch 181 to drive the end surface of the valve plate 1811 to rotate to be parallel to the axial direction of the printing nozzle 162, and the molten molding material can pass through the printing nozzle 162. The material tube is printed.

[0038] See Figure 4 When the printing nozzle 162 is in the stopped printing state, the controller of the 3D printer controls the electronic pressure switch 181 to drive the end surface of the valve plate 1811 to rotate to be perpendicular to the axis of the printing nozzle 162, cutting off the feeding port and the output of the pr...

no. 2 example

[0040] As an illustration of the second embodiment of the print head of the present invention, only the differences from the first embodiment of the print head described above will be described below, in which a mechanical pressure switch is used instead of an electronic pressure switch. When the printing nozzle is in the printing state, when the pressure at the mechanical pressure switch increases and reaches a predetermined value, the mechanical pressure switch is turned on, and the molten molding material can pass through the discharge tube of the printing nozzle; when the printing nozzle is in the stop printing state When the pressure at the mechanical pressure switch drops and drops below the predetermined value, the mechanical pressure switch is closed to cut off the passage between the feed port and the discharge port of the printing nozzle.

no. 3 example

[0042] As an explanation of the third embodiment of the print head of the present invention, only the differences from the first embodiment of the above print head will be described below. A pressure sensor is provided in the discharge tube of the printing nozzle. When the pressure sensor detects the printing nozzle When the internal pressure reaches a predetermined value, the controller of the 3D printer controls the pressure switch to turn on; when the sensor detects that the pressure in the printing nozzle drops below the predetermined value, the controller of the 3D printer controls the pressure switch to turn off.

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PUM

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Abstract

The invention relates to a printing head for a three-dimensional printer, which includes a heater and a long cylindrical printing nozzle, and a cut-off valve is arranged on the passage of the printing nozzle. By controlling the opening and closing of the shut-off valve, it can effectively prevent the excess molding material from dripping onto the molded part due to the feeding inertia of the feeding device, which will affect the printing quality, and can also effectively prevent the mold remaining in the channel of the printing nozzle. The material is vibrated and dripped on the molded part during the movement of the printing nozzle, which improves the printing quality. In addition, the present invention also provides a three-dimensional printer including the above printing head.

Description

Technical field [0001] The invention relates to a component of a rapid prototyping device and a rapid prototyping device containing the component, in particular to a printing head used in a fused deposition type rapid prototyping device and a three-dimensional printer containing the printing head. Background technique [0002] A three-dimensional printer is a device based on a digital model that uses materials such as powdered metal or plastic to construct three-dimensional objects by printing layer by layer. One of the three-dimensional printers supplies molding materials to the print head in the form of filaments. The molding materials are heated to a molten state by electric heating in the print head, and the print head will face the substrate according to the print head produced by the controller of the three-dimensional printer. The moving path prints out three-dimensional objects layer by layer. [0003] The background art of the patent document with the publication number C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C67/00B22F3/115
CPCB33Y30/00B29C64/118B29C64/106Y02P10/25B22F12/53B22F12/90B22F12/10B22F12/55B22F12/57B22F12/20
Inventor 苏健强宋道权
Owner PRINT RITE UNICORN IMAGE PROD CO LTD