Powder heating assembly and heating module of rapid prototyping apparatus

Patent metadata

Field	Value
Publication number	US-9937639-B2
Application number	US-201514684779-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 23, 2014
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A powder heating assembly of a rapid prototyping apparatus includes a powder feeder and a heating module. The powder feeder includes an accommodation space and a powder falling port in communication with the accommodation space. The heating module is disposed under the powder feeder, and includes a thermally conductive cap and a heat conduction structure. The powder falling port is capped by the thermally conductive cap. The thermally conductive cap includes a powder exhaust port. The powder exhaust port is in communication with the powder falling port. The heat conduction structure is arranged between the accommodation space of the powder feeder and the thermally conductive cap and includes a heater. The heat generated by the heater is transferred to the construction powder within the powder feeder to preheat the construction powder, remove the moisture contained in the construction powder and dry the construction powder.

First claim

What is claimed is:

1. A powder heating assembly of a rapid prototyping apparatus, the powder heating assembly comprising:
a powder feeder comprising an accommodation space and a powder falling port in communication with the accommodation space, wherein a construction powder is accommodated within the accommodation space;
a heating module disposed under the powder feeder, and comprising a thermally conductive cap and a heat conduction structure, wherein the powder falling port is capped by the thermally conductive cap, the thermally conductive cap comprises a powder exhaust port, and the powder exhaust port is in communication with the powder falling port, wherein the heat conduction structure is arranged between the accommodation space of the powder feeder and the thermally conductive cap and comprises a heater, wherein the heat generated by the heater is transferred to the construction powder within the powder feeder through the heat conduction structure and the thermally conductive cap to preheat the construction powder accommodated within a bottom of the accommodation space, remove the moisture contained in the construction powder and dry the construction powder, wherein after the dried construction powder is ejected out of the powder exhaust port, a powder spreading process is performed.

2. The powder heating assembly according to claim 1 , wherein a stirrer is further disposed within the accommodation space of the powder feeder for stirring the construction powder.

3. The powder heating assembly according to claim 1 , wherein the powder feeder further comprises a powder amount control bar, wherein the powder amount control bar is located at the powder falling port.

4. The powder heating assembly according to claim 3 , wherein the thermally conductive cap further comprises a receiving recess, wherein the powder amount control bar is partially accommodated within the receiving recess.

5. The powder heating assembly according to claim 1 , wherein the heating module further comprises a temperature sensor, wherein the temperature sensor is disposed within the heat conduction structure for sensing and adjusting a heating temperature of the heater.

6. The powder heating assembly according to claim 1 , wherein each of the thermally conductive cap and the heat conduction structure is made of aluminum.

7. A heating module for a powder feeder of a rapid prototyping apparatus, the powder feeder accommodating a construction powder, the heating module comprising:
a thermally conductive cap disposed within the powder feeder, and the powder feeder is capped by the thermally conductive cap, wherein a powder exhaust port is defined by the thermally conductive cap and the powder feeder collaboratively; and
a heat conduction structure disposed within the powder feeder and contacted with the thermally conductive cap, wherein a heater is disposed within the heat conduction structure,
wherein the heat generated by the heater is transferred to the construction powder within the powder feeder through the heat conduction structure and the thermally conductive cap to preheat the construction powder accommodated within a bottom of the accommodation space, remove the moisture contained in the construction powder and dry the construction powder, wherein after the dried construction powder is ejected out of the powder exhaust port, a powder spreading process is performed.

8. The heating module according to claim 7 , wherein the powder feeder further comprises a powder amount control bar, and a receiving recess is located beside the powder exhaust port, wherein the powder amount control bar is partially accommodated within the receiving recess.

9. The heating module according to claim 7 , wherein the heating module further comprises a temperature sensor, wherein the temperature sensor is disposed within the heat conduction structure for sensing and adjusting a heating temperature of the heater.

10. The heating module according to claim 7 , wherein each of the thermally conductive cap and the heat conduction structure is made of aluminum.

Assignees

• Microjet Technology Co Ltd

Inventors

• Chen Chin-Tsung
• Lin Yen-Yu
• Shi Kwo-Yuan

Classifications

• B29C2035/0283

  Thermal pretreatment of the plastics material · CPC title

• F26B25/04

  Agitating, stirring, or scraping devices {(arrangement of doctor blades F26B17/286)} · CPC title

• B29C64/165

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title

• B29B13/021 Primary

  Heat treatment of powders · CPC title

• F26B17/16

  the materials passing down a heated surface {, e.g. fluid-heated closed ducts or other heating elements in contact with the moving stack of material (F26B17/128 takes precedence)} · CPC title