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Printing head and three-dimensional printer

A technology of 3D printer and print head, applied in the direction of processing and manufacturing, manufacturing tools, additive manufacturing, etc., can solve the problems affecting printing quality, affecting the printing of printing nozzles, etc., and achieve the effect of improving printing quality

Active Publication Date: 2014-06-25
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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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] see Figure 3 to Figure 4, the printing head is made up of feeding device 15, heater 161, cooling device 17, printing nozzle 162 and cut-off valve, and the cut-off valve is the electronic pressure switch 181 that is located in the discharge pipe of printing nozzle 162.

[0037] see image 3 , when the printing nozzle 162 is in the printing state, the controller of the three-dimensional 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 molding material in the molten state can pass through the outlet of the printing nozzle 162. Tube for printing.

[0038] see Figure 4 , when the printing nozzle 162 is in the stop printing state, the controller of the three-dimensional printer controls the electronic pressure switch 181 to drive the end face of the valve plate 1811 to rotate to be perpendicular to the axial direction of the printing nozz...

no. 2 example

[0040] As a description 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, wherein 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 molding material in the molten state can pass through the discharge pipe of the printing nozzle; when the printing nozzle is in the stop printing state , when the pressure at the mechanical pressure switch drops below a predetermined value, the mechanical pressure switch is turned off, cutting off the channel between the inlet and outlet of the printing nozzle.

no. 3 example

[0042] As a description of the third 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. A pressure sensor is provided in the discharge pipe of the print nozzle. When the pressure sensor detects that the print 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. The printing head comprises a heater and a long-barrel-shaped printing nozzle, wherein a stop valve is arranged on a channel of the printing nozzle. By controlling the stop valve to be switched on and off, the influence on the printing quality caused by that redundant forming materials drops onto formed parts caused by feeding inertia of a feeding device can be effectively prevented, the forming materials remained in the channel of the printing nozzle can be effectively prevented from dropping on the formed parts due to vibration in a moving process of the printing nozzle, and the printing quality is improved. In addition, the invention further provides the three-dimensional printer with the printing head.

Description

technical field [0001] The invention relates to a component of a rapid prototyping device and a rapid prototyping device comprising the component, in particular to a print head for a fused deposition type rapid prototyping device and a three-dimensional printer comprising the print 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 layer-by-layer printing. One of the three-dimensional printers is to supply molding materials to the printing head in the form of filaments. The molding materials are heated to a molten state by means of electric heating in the printing head. The moving path prints out the 3D object layer by layer. [0003] The background technology of the patent document whose notification number is CN1216726C describes a kind of three-dimensional printer that supplies molding materials to the printing head in the form...

Claims

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Application Information

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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
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