TWM452808U - Air pre-heating type coating device - Google Patents

Description

Air preheating coating device

This creation has a technical field of spray processing, especially a spray device for spray processing.

In the prior art, there is a screw, and the external thread portion of the screw is sprayed with a material having anti-loose, anti-leakage or anti-corrosion effect. In the current coating processing method, the screw to be processed is first heated and preheated. At the same time, the powdered coating is sprayed with compressed air on the threaded portion of the screw workpiece, and the heated workpiece is melted to evenly coat the externally threaded portion and form a coating layer through the coating layer. Provides a combination of screws and interconnected objects to achieve a stable combination to prevent the screws from loosening naturally, to prevent liquid from leaking from the screw joints, or to prevent the screws from rusting.

However, in the actual operation of the above coating method, since the small screw workpiece has a small volume and less heat storage, the contact of the compressed air to the surface of the screw workpiece causes a sudden drop in the temperature of the screw workpiece, so that the paint cannot be heated and melted to form a coating layer, and cannot be The desired adhesion is achieved, so the current coating method has the disadvantage of being difficult to machine small screws, and needs to be improved.

In view of the shortcomings of the prior art coating processing method that the coating cannot be reliably melted, the present invention has an air preheating coating device which can preheat the compressed air and the coating to achieve the purpose of the coating being able to be surely melted.

In order to achieve the above-mentioned creative purpose, the technique of the air preheating coating device of the present invention is utilized. The method includes: providing a compressed air tube, a paint container and a heating device; the compressed air tube is a hollow tube body, the two ends of which are respectively an input end and an output end, wherein the input end is connected to the air pressure source, The output end is provided with a nozzle; the paint container has a paint inlet and a paint outlet, and the paint outlet communicates with the inside of the compressed air pipe, and the heating device is disposed on the compressed air pipe.

In the air preheating coating device, the compressed air tube is provided with a venturi, and the paint outlet of the paint container is connected to the venturi.

The air preheating coating device, wherein the paint container is a funnel-shaped tube, and an inner diameter of the paint inlet of the paint container is larger than an inner diameter of the paint outlet.

The air preheating coating device, wherein the heating device is installed inside a compressed air tube.

The air preheating coating device, wherein the heating device is a heating wire, the heating wire is spiral and disposed on an outer wall surface of the compressed air pipe along a long axial direction of the compressed air pipe.

In the air preheating coating device, a temperature controller is disposed on the heating device, and a temperature sensor is disposed on the nozzle, and the temperature controller and the temperature sensor are electrically connected to each other.

The air preheating coating device, wherein a flow regulating valve is disposed on the compressed air pipe.

By the use of the above technical means, since the heating device can preheat the compressed air and the paint to be sprayed, the heated compressed air contacts the workpiece, so that the temperature of the preheated workpiece is slowed down, and the workpiece can be reliably heated. By the predetermined temperature, and the coating is surely melted to form a coating layer, the present invention can effectively solve the shortcomings of the small screw spraying process, and has considerable practicability.

10‧‧‧Compressed air tube

100‧‧‧ input

101‧‧‧ Output

102‧‧‧ venturi tube

11‧‧‧Nozzles

110‧‧‧ openings

12‧‧‧Thermometer

20‧‧‧ paint containers

21‧‧‧ paint entrance

22‧‧‧ Paint exports

30‧‧‧ heating device

31‧‧‧Flow adjustment valve

40‧‧‧Workpiece

41‧‧‧Spots to be sprayed

Figure 1 is a perspective view of the creation of the present invention.

Figure 2 is a schematic side view of the creation of the present invention.

FIG. 3 is a schematic view of an embodiment of the work applied to the workpiece to be processed.

The present invention is an air preheating coating device, as shown in FIGS. 1 and 2, which includes a compressed air tube 10, a paint container 20, and a heating device 30.

The compressed air tube 10 is a hollow tube body, and the two ends thereof are respectively an input end 100 and an output end 101. The tube body between the input end 100 and the output end 101 forms a venturi 102. The cross-sectional area of the tube at both ends of the tube 102 is large and the cross-sectional area of the tube at the center is small. The input end 100 is connected to a gas pressure source (not shown), and the output end 101 is provided with a nozzle 11 having An opening 110, the size and shape of the opening 110 can be designed according to the screw to be processed, and a temperature sensor 12 is disposed on the wall surface of the opening 110. The temperature sensor 12 is prior art, and the temperature sensor 12 is The temperature of the compressed air ejected from the nozzle 11 can be sensed. In the preferred embodiment of the present invention, the compressed air tube 10 is a metal copper tube body, and a flow regulating valve 31 is further disposed on the compressed air tube 10.

The paint container 20 is a hollow tube body. The tube body is provided with a paint inlet 21 and a paint outlet 22. The paint outlet 22 is connected to the venturi 102 and communicates with the compressed air tube 10, and the paint outlet 22 and the compressed air The tube 10 is internally connected. In the preferred embodiment of the present invention, the paint container 20 is a narrow, narrow tube having a funnel shape, and the inner diameter of the paint inlet 21 is larger than the inner diameter of the paint outlet 22.

The heating device 30 is a heating wire which is spirally disposed on the outer wall surface of the compressed air pipe 10 along the long axis of the compressed air pipe 10. The heating device 30 can be heated by the heating wire to improve the compression. The temperature of the air passing through the air tube 10 and the inside thereof; in the specific embodiment of the present invention, a further thermostat (not shown) is disposed on the heating device 30, the temperature controller and the heating device The 30 and the temperature sensor 12 are electrically connected.

In the actual use of the air preheating coating device of the present invention, please refer to FIG. 2 and FIG. 3, the nozzle 11 faces the portion 41 to be painted of a workpiece 40 to be processed, in a specific embodiment of the present creation. The workpiece 40 is a screw, and the portion to be painted 41 is a threaded portion of the screw. First, the workpiece 40 to be processed is heated and preheated, and the surface temperature of the workpiece 40 is heated to be higher than the melting point temperature of the coating. The air pressure source outputs compressed air to the compressed air tube 10, and the compressed air is input from the input end 100 through the venturi. 102 flows toward the output end 101, and the powdery solid coating is introduced into the paint container 20 from the paint inlet 21, and the paint is input into the interior of the venturi 102. When the compressed air passes through the venturi 102, the powder paint can be sucked. The heating device 30 can heat the air passing through the compressed air pipe 10 and the internal space thereof. Therefore, the heating device 30 can pre-dry and heat the compressed air and the paint. When the compressed air is sprayed from the nozzle 11, the powder paint can be sprayed on the workpiece at the same time. 40, on the sprayed portion 41, since the compressed air and the paint are preheated before spraying, providing compressed air to contact the workpiece 40 does not cause a sudden drop in the temperature of the workpiece 40, and the surface temperature of the portion to be sprayed 41 is still higher than that of the paint. a melting point temperature, so that the coating material can be heated and melted to uniformly coat the surface of the portion to be painted 41 to form a coating layer; the temperature sensor 12 can sense the nozzle 11 The temperature of the area around the opening 110, when the sensed temperature drops to a certain extent, the temperature sensor 12 can activate the temperature controller, the temperature controller increases the heating temperature of the heating device 30 to a certain extent, then closes to maintain the temperature The temperature of the compressed air and the paint passing through the internal space of the compressed air pipe 10. By the above technical means, the workpiece 40 can be heated to a predetermined temperature so that the coating is surely melted to form a coating layer, thereby improving the adhesion of the coating.

In the redesign of the present invention, the heating device can also be disposed in a compressed air tube. In the structural design of the heating device in the compressed air tube, the compressed air tube does not need to use a copper tube, and the material of the tube body can be glass, If the metal or polymer material is a metal pipe body, the outer wall surface of the pipe is covered with a heat insulating material or a heat insulating film to form an insulation.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to limit the present invention, and any technique familiar to the art. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the technical content disclosed above, but the content of the present invention is not deviated from the present invention. Technical simplifications Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present technical solution.

10‧‧‧Compressed air tube

100‧‧‧ input

101‧‧‧ Output

11‧‧‧Nozzles

110‧‧‧ openings

12‧‧‧Thermometer

20‧‧‧ paint containers

21‧‧‧ paint entrance

30‧‧‧ heating device

31‧‧‧ thermostat

Claims (8)

An air preheating coating device comprises a compressed air tube, a paint container and a heating device; the compressed air tube is a hollow tube body, the two ends of which are respectively an input end and an output end, wherein the input end is provided A gas pressure source is connected, and the output end is provided with a nozzle; the paint container has a paint inlet and a paint outlet, and the paint outlet communicates with the inside of the compressed air pipe, and the heating device is disposed on the compressed air pipe. The air preheating coating apparatus of claim 1, wherein the compressed air tube is provided with a venturi, and the paint outlet of the paint container is in communication with the venturi. The air preheating coating apparatus according to claim 2, wherein the paint container is a funnel-shaped tube, and an inner diameter of the paint inlet of the paint container is larger than an inner diameter of the paint outlet. The air preheating coating apparatus according to any one of claims 1 to 3, wherein the heating apparatus is installed inside the compressed air tube. The air preheating coating apparatus according to any one of claims 1 to 3, wherein the heating device is a heating wire, the heating wire is spiral and disposed in the compressed air tube along a long axial direction of the compressed air pipe. On the outer wall. The air preheating coating device according to claim 4, wherein a temperature controller is disposed on the heating device, and a temperature sensor is disposed on the nozzle, and the temperature controller and the temperature sensor are electrically connected to each other. The air preheating coating device according to claim 5, wherein a temperature controller is disposed on the heating device, and a temperature sensor is disposed on the nozzle, and the temperature controller and the temperature sensor are electrically connected to each other. The air preheating coating apparatus according to claim 5, wherein a flow regulating valve is provided on the compressed air pipe.