Thermal spraying system

Patent metadata

Field	Value
Publication number	US-9895709-B2
Application number	US-201615260432-A
Country	US
Kind code	B2
Filing date	Sep 9, 2016
Priority date	Jun 19, 2014
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A thermal spraying system includes a fixing device and a thermal spraying apparatus that are relatively movable. The thermal spraying apparatus includes a hollow pipe, an extrusion die, a transporting device, a helical pipe, a fluid supplying device, and a heater. The hollow pipe defines an accommodating space. The extrusion die is connected with the hollow pipe. The extrusion die has a nozzle. The nozzle is in spatial communication with the accommodating space. The transporting device is used for moving a raw material to pass through the nozzle. The hollow pipe is surrounded by the helical pipe. An end of the helical pipe is connected to the nozzle. The fluid supplying device is connected to another end of the helical pipe. The heater encloses the helical pipe and the hollow pipe for heating the helical pipe and the accommodating space.

First claim

What is claimed is:

1. A thermal spraying system comprising:
a fixing device for fixing an object to be thermally sprayed;
a thermal spraying apparatus for performing a thermal spraying operation to the object to be thermally sprayed, the thermal spraying apparatus comprising:
a hollow pipe defining an accommodating space in the hollow pipe, the accommodating space being configured to accommodate a raw material;
an extrusion die connected with the hollow pipe, the extrusion die having a nozzle, the nozzle being in spatial communication with the accommodating space;
a transporting device for moving the raw material to pass through the nozzle;
a helical pipe surrounding the hollow pipe, an end of the helical pipe being connected to the nozzle;
a fluid supplying device connected to another end of the helical pipe; and
a heater enclosing the helical pipe and the hollow pipe for heating the helical pipe and the accommodating space; and

a motion module for driving a relative motion between the thermal spraying apparatus and the fixing device.

2. The thermal spraying system of claim 1 , wherein the motion module comprises a thermal spraying motion device connected to the thermal spraying apparatus for driving the thermal spraying apparatus to move in at least a first dimension relative to the object to be thermally sprayed.

3. The thermal spraying system of claim 2 , wherein the motion module comprises an object motion device connected to the fixing device for driving the object to be thermally sprayed to move in at least a second dimension relative to the thermal spraying apparatus.

4. The thermal spraying system of claim 3 , wherein the first dimension is linearly independent of the second dimension.

5. The thermal spraying apparatus of claim 1 , further comprising:
at least one raw material supplying device for supplying the raw material,
wherein the nozzle is in spatial communication with the raw material supplying device and the fluid supplying device so that the fluid is able to carry the raw material to be sprayed from the nozzle.

6. The thermal spraying system of claim 5 , wherein a number of the at least one raw material supplying device is plural, and the raw material supplying devices are respectively configured to supply the different raw materials to the nozzle.

7. The thermal spraying system of claim 6 , wherein each of the raw material supplying devices comprises a raw material supplying pipe, the nozzle comprises a first discharge port and a second discharge port, the raw material supplying pipes are respectively in spatial communication with the first discharge port and the second discharge port.

8. The thermal spraying system of claim 7 , wherein the first discharge port surrounds the second discharge port.

9. The thermal spraying system of claim 5 , wherein the thermal spraying apparatus further comprises:
a switching valve connected between the raw material supplying device and the nozzle.

10. The thermal spraying system of claim 9 , wherein the thermal spraying apparatus further comprises:
a synchronous device for controlling the switching valve and the raw material supplying device to be turned on and turned off simultaneously.

11. The thermal spraying system of claim 5 , wherein the raw material supplying device has a raw material supplying pipe connected to the thermal spraying apparatus, the raw material supplying pipe is a flexible pipe.

12. The thermal spraying system of claim 1 , wherein the transporting device comprises a piston, and the thermal spraying apparatus further comprises:
a propulsion passage, the accommodating space being divided into a front part closer to the nozzle and a back part farther from the nozzle by the piston, an end of the propulsion passage being connected to the fluid supplying device, another end of the propulsion passage being in spatial communication with the back part so that fluid provided by the fluid supplying device is able to push the piston to move toward the nozzle.

13. The thermal spraying system of claim 1 , wherein the transporting device comprises a piston, and the thermal spraying apparatus further comprises:
a pressure controller for controlling a pressure of the fluid provided by the fluid supplying device so that the closer the piston is to the nozzle, the lower pressure the fluid has.

14. The thermal spraying system of claim 1 , wherein the transporting device comprises a piston, and the accommodating space is divided into a front part closer to the nozzle and a back part farther from the nozzle by the piston, the piston has an air passage in the piston, the air passage is in spatial communication with the front part and an outside of the thermal spraying apparatus.

15. The thermal spraying system of claim 1 , wherein the transporting device comprises a piston, and the thermal spraying apparatus further comprises:
a pushrod connected to the piston and extending outside the accommodating space.

16. The thermal spraying system of claim 1 , wherein the transporting device comprises a piston, and the thermal spraying system further comprises:
a piston control device for controlling the piston to push the raw material at a constant speed.

17. The thermal spraying system of claim 16 , wherein the transporting device comprises a piston, and the thermal spraying system further comprises:
a pushrod connected to the piston, the piston control device comprising a stepper motor, an output shaft of the stepper motor being connected to the pushrod so as to control the piston to move in the accommodating space at a constant speed by the pushrod.

18. The thermal spraying system of claim 1 , further comprising:
a temperature controller electrically connected to the heater for controlling a temperature of the heater.

19. The thermal spraying system of claim 1 , further comprising:
a heat-insulating element enclosing the heater, the helical pipe, and the hollow pipe.

20. A thermal spraying system comprising:
a fixing device for fixing an object to be thermally sprayed;
at least one raw material supplying device for supplying a raw material;
a fluid supplying device for supplying a fluid;
a thermal spraying apparatus for performing a thermal spraying operation to the object to be thermally sprayed, the thermal spraying apparatus comprising:
an extrusion die connected to the raw material supplying device, the extrusion die having a nozzle, the nozzle being in spatial communication with the raw material supplying device and the fluid supplying device so that the fluid is able to carry the raw material to be sprayed from the nozzle;
a heater;
a helical pipe surrounding the heater and being in spatial communication with the nozzle and the fluid supplying device so that the fluid from the fluid supplying device flows to the nozzle via the helical pipe and the fluid is heated by utilizing the heater; and

a motion module for driving a relative motion between the thermal spraying apparatus and the fixing device.

Assignees

• Taiwan Textile Res Inst

Inventors

• Peng Chao Chun
• Kuo Ming Chih

Classifications

• B05B9/0838

  supply being effected by follower in container, e.g. membrane or floating piston, or by deformation of container · CPC title

• B05B7/1693

  with means for heating the material to be sprayed or an atomizing fluid in a supply hose or the like · CPC title

• B05B7/1646

  the material to be sprayed and the atomising fluid being heated by the same source of heat, without transfer of heat between atomising fluid and material to be sprayed · CPC title

• B05B7/18

  the material having originally the shape of a wire, rod or the like {(B05B7/203, B05B7/224 take precedence)} · CPC title

• B05B7/2497

  several liquids from different sources being supplied to the discharge device · CPC title