JPH09271713A - Method of melt sticking coating powder on core material and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save whorkhours and processes and to prevent fastening traces of a holder or the like by mounting a core material on one surface of a conveying body whose the other surface not contacted with the core material is cooled and heating coating powder applied and adhering to the surface of the core material to subject it to melt sticking. SOLUTION: After metal parts are heated in a preheat oven 16, coating powder is stuck to them by a suitable amount in a fluidized immersion tank 44a. Next, the metal parts pass through a discharge port 52a and a chute 58a and enter a melt cure oven 60a and are mounted on a steel belt. The steel belt is cooled by a cooling wind sent from a cooling fan 92a through a blast port 94a on the side of the back surface thereof on which metallic part is not mounted. The covering powder stuck on the surface opposite to an electric heater 66a is melted by an electric heater 66a to coat the surface with it. Since the back surface of the steel belt is cooled, the coating powder is not melt stuck to the belt. A holder is not used, and so fastening traces thereof are not produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method and an apparatus for fusing a coating powder on a core material, and more particularly to a method and an apparatus for coating a metal part with plastic powder.

[0002]

2. Description of the Related Art Conventionally, when a metal part is coated with a plastic powder, the metal part is preheated in a preheat oven and then placed in a fluidized immersion tank filled with the plastic powder and vibrating and flowing to form a plastic part on the metal part. Apply the powder once. After that, in order to cover it, the metal parts that come out of the fluid immersion tank are temporarily placed in a saucer, etc., and a person sandwiches the metal parts in a holder and heats the metal parts sandwiched in the holder in an oven, but the metal parts and the holder come into contact with each other. When the plastic material in the area where it is melted is melted, the metal part and the holder will be welded, so the plastic powder other than the contact part between the holder and the metal part is heated and melted in the furnace,
After taking out and cooling, it was removed from the holder, another part was re-sandwiched with the holder, and then heated.

[0003]

However, in the conventional method, in order to melt and adhere the metal parts to which the plastic powder adheres, the metal parts coming out of the fluidized dipping tank are temporarily stored in a saucer or the like, so that the manual operation is manually performed. Since it was necessary to pinch the holder, there were many work processes.

Further, although the metal parts sandwiched between the holders are heated in the oven furnace, when the plastic material in the portion where the metal parts and the holder are in contact with each other is melted, the holder and the metal parts are welded to each other. Occurs in the furnace after heating and adhering the plastic powder in the area other than the contact area between the holder and the metal parts, then taking it out of the oven to cool it, remove the metal parts from the holder, and re-pinch the other parts with the holder. , Had to reheat.

Moreover, the plastic coating on the contact portion between the holder and the metal component is likely to become thin during heating due to the clamping force of the holder and cause defective coating.
The scissors left traces of scissors, which was a cause of aesthetically impaired appearance.

Therefore, according to the present invention, a core material such as a metal part is coated with a coating powder such as a plastic material.
A core material that can facilitate work, save work time and processes, and can satisfactorily coat a core material such as a metal part with a plastic material or the like without leaving scissor marks on the holder or the like. A coating method and apparatus for fusing coating powder.

[0007]

A coating method for fusing a coating powder onto a core material according to claim 1 comprises preheating the core material in a preheating furnace,
Put the preheated core material in the tank that is filled with the coating powder and vibrates and flows to adhere the coating powder to the surface of the core material, and then heat the coating powder attached to the core material. A coating method for fusing a coating powder on the surface of a core material, wherein, when heating the coating powder adhered to the core material, one side of the carrier body that is not in contact with the core material is cooled while the other side of the carrier body is cooled. Is a coating method in which the coating powder on the surface of the core material placed on the surface is heated to fuse the coating powder to the surface of the core material, and the coating powder is fused to the core material.

The coating method of fusing the coating powder to the core material according to claim 2 preheats the metal part to be coated in a preheating furnace, and then fills the plastic powder in a fluidized immersion tank which is vibrating and flowing, It is a coating method in which preheated metal parts are put and plastic powder is attached to this surface, and then the plastic powder is fused to the metal parts by heating in a heating furnace, and the metal parts are sent from the preheating furnace to the fluidized dipping tank. The metal part to which the plastic powder is adhered in the fluidized dipping tank is placed on the surface of the steel belt that conveys the metal part, and while the lower surface of the steel belt is cooled, the metal part is conveyed and heated in the heating furnace. A coating method for fusing a coating powder to a core material according to claim 1, wherein the plastic which is not in contact with the steel belt is heated and fused to the metal component.

The coating method of fusing the coating powder to the core material of claim 3 is to invert the metal component after melting and fusing the plastic powder by heating the metal component to which the plastic powder adheres in a heating furnace. The plastic powder is melted and fused on the entire surface of the metal part by heating again in the heating furnace of the same method, and the coating powder is fused to the core material according to claim 2.

According to a fourth aspect of the present invention, there is provided a coating device for fusing a coating powder to a core material, wherein a preheating furnace for preheating the core material and a coating powder for coating the core material are vibrated and flowed, and the core is preheated in the preheating furnace. Material and put the coating powder on the surface of the core material in a fluidized dipping tank, and heat the coating powder deposited on the surface of the core material in the fluidized dipping tank to fuse the coating powder to the surface of the core material In a coating apparatus for fusing the coating powder to the core material, which comprises a heating furnace for coating the core material, the core material to which the coating powder is attached is guided from the preheating furnace to the fluidization immersion tank between the preheating furnace and the fluidization immersion tank. A guide body is formed for the purpose of transporting the coating powder while heating the coating powder in a heating furnace, heating the coating powder adhered to the surface of the core material placed on the surface of the transport material in contact with the core material,
And the other surface, which is not in direct contact with the core material, is cooled, and the surface in contact with the carrier is kept at a temperature at which the coating powder does not melt and harden and is formed so as to be heated. It is a coating device for fusing.

In the coating apparatus for fusing the coating powder to the core material according to claim 5, the metal parts to be coated are preheated in a preheating furnace and preheated in a fluidized immersion tank filled with plastic powder and vibrating and flowing. A coating device for putting a metal part and depositing plastic powder on the surface, and then heating the plastic powder in a heating furnace to coat the plastic powder, wherein the plastic powder is heated in the preheating furnace between the preheating furnace and the fluidized dipping tank. A chute is formed to send the adhered metal parts to the fluidized dipping tank, and the lower surface of the steel belt is cooled in the heating furnace.The metal parts coated with the plastic powder are placed on the steel belt and transported and heated. A coating device for fusion-bonding the coating powder to the core material according to claim 4.

The coating device for fusing the coating powder to the core material according to claim 6 is the coating device according to claim 5, wherein at least two or more heating furnaces are formed, and the metal is heated in the previous heating furnace. After the plastic powder is attached to the parts, the metal parts are inverted and sent to the subsequent heating furnace again, and a reversing device is provided. By heating in the front and rear heating furnaces, the entire surface of the metal parts is coated with the plastic powder. A coating device for fusing a coating powder to the core material according to claim 5.

[0013]

According to the present invention, the core material such as the metal parts to which the coating powder such as the plastic powder adheres is the surface of the core material placed on the steel belt while cooling the lower surface of the carrier such as the steel belt. The coating powder of 1 is heated in a heating furnace.
Therefore, the coating powder in the portion not in contact with the carrier such as the steel belt is heated at a temperature higher than the melting point,
The coating powder that is not in contact with the carrier such as a steel belt does not melt and harden because the surface temperature of the carrier is kept lower than the melting point of the coating powder. As a result, it is not necessary for a person to pinch the core material such as the metal part with the holder to coat the core material such as the metal part with the coating powder such as the plastic material. And the process can be omitted. In addition, it is possible to prevent poor coverage of the plastic material etc. sandwiched between the holders, and it is possible to satisfactorily coat the core material such as metal parts with the plastic material etc. without leaving scissors marks. The plastic material and the like can be satisfactorily coated on the surface and in appearance.

After passing through this heating furnace, it is cooled and
After fusing the coating powder, flip the core material such as metal parts,
If the coated powder portion that was in contact with the carrier of the previous heating furnace is continuously heated again in the heating furnace, and if it is cooled after passing through the furnace, the plastic material etc. The whole coating powder is melted, fused and hardened. Thereby, the work can be further facilitated, and the work time and process can be saved.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings.

[0016]

1 is a side view solution diagram showing an embodiment of the present invention, and FIG. 2 is a plan view solution diagram of the example shown in FIG.

The coating device 10 shown in FIGS. 1 and 2 is a device for coating the metal component 12 by melting plastic powder, that is, coating powder 14, in the metal component 12 as a core material.

The coating apparatus 10 includes a preheating oven 16 which is a preheating furnace for preheating the metal component 12. The preheat oven 16 includes a net belt conveyor 18 on which the metal component 12 is placed and conveyed, and a housing 2 formed so as to cover the periphery of the net belt conveyor 18.
0 and a plurality of electric heaters 22 that are formed side by side in the traveling direction of the net belt conveyor 18 above the inside of the housing 20.
including.

Next, the net belt conveyor 18 will be described with reference to FIGS. 3 is a plan view showing the net belt conveyor 18, and FIG.
FIG. 4 is a sectional view solution diagram in a section IV-IV of the example shown in FIG. 3. The net belt conveyor 18 has a housing 20 at one end thereof.
The net belt conveyor 18 has a belt 26 formed in a net shape as its name suggests. The net belt conveyor 18 is the belt 2
6 is inserted into the roller chain with attachment 28,
The attachment roller chain 28 is driven by a drive motor 30 and is configured to rotate on a rail 32 fixed in the longitudinal direction of the casing 20 along the rail 32.

This is to prevent the belt 26 from meandering or warping due to the thermal stress applied during heating.
Further, by forming the belt 26 in a net shape, the entire metal component 12 is heated by the air convection generated inside the housing 20, and only one surface of the metal component 12 facing the electric heater 22 is heated by the radiant heat. It is possible to prevent heating. In consideration of heating by the electric heater 22, the belt 26 is preferably formed of a metal material having high heat resistance, such as stainless steel.

As described above, in the preheat oven 16, the metal component 12 placed on the upper surface of the belt 26 in the charging unit 24 is heated by the electric heater 22 while being conveyed to the net belt conveyor 18, and reaches a predetermined temperature. It is configured to be heated. The metal component 12 heated by the electric heater 22 is attached to the front housing 20 in the traveling direction of the net belt conveyor 18.
Chute 34a and chute 34 formed in the lower part of the
It is configured to drop to b.

The chute 34a and the chute 34b are
The belts 26 are arranged symmetrically with respect to the center of the belt 26 in the width direction. The chute 34a is composed of a slope portion 36a and a funnel portion 38a, and the upper end portion of the slope portion 36a is fixed to the housing 20 so as to be arranged near the front end of the net belt conveyor 18, and the funnel portion 38a. The lower opening is connected to the core material inlet 42a of the fluidized dipping tank 40a. As a result, the net belt conveyor 18
The metal component 12 that has fallen further falls down the slope portion 36a and falls inside the funnel portion 38a, so that the metal component 12 is reliably introduced into the core material introduction port 42a of the fluidized immersion tank 40a.

Further, since the chute 34b has the same structure as the chute 34a, the metal part 12 dropped from the net belt conveyor 18 is surely fluidized and dipped by sliding down the slope part 36b and falling inside the funnel part 38b. It is charged into the core material charging port 42b of the tank 40b.

Therefore, the metal part 1 is attached to the charging portion 24 so as to match the interval between the slope portion 36a and the slope portion 36b.
By arranging the core materials such as 2 in two rows and charging them, not only a single type but also two types can be preheated without being mixed and introduced into the fluidized-bed tank 40a and the fluidized-bed tank 40b.

Next, the fluidized-bed bath 40a and the fluidized-bed bath 40b will be described with reference to FIGS. 5 is a plan schematic diagram showing the fluidized dipping tank 40a, FIG. 6 is a side schematic diagram in the example shown in FIG. 5, and FIG. 7 is a cross sectional schematic diagram taken along the line VII-VII in FIG. , FIG. 8 is a sectional schematic view in a section IIX-IIX of FIG. 4. Fluid immersion tank 40a and fluidized immersion tank 40
b is similar to the chute 34a and the chute 34b,
The belts 26 are arranged symmetrically with respect to the center of the belt 26 in the width direction. The fluidized dipping tank 40a is for adhering the coating powder 14 to the surface of the metal component 12, and is a cylindrical tank 44a for storing the coating powder 14 and the charging of the metal component 12 formed in the upper opening of the tank 44a. A core material input port 42a,
A coating powder charging port 46a, which is a charging port for the coating powder 14 formed in the opening on the opposite side in the diametrical direction, is formed.

A vibrating support 50a having a vibration motor 48a for periodically vibrating the tank 44a is fixed to the lower portion of the tank 44a so that the tank 44a vibrates periodically by the action of the vibration motor 48a. Is formed in.

Then, the tank 44a is coated by utilizing this vibration for fluidizing the coating powder 14 by a combination of various movements of the tank 44a which is periodically vibrated along three orthogonal axes, for example. The powder 14 is made to flow, and the metal part 12 to which the coating powder 14 is attached is discharged from the outlet 52.
A guide 54a that guides toward a is formed, and this guide 54a is formed from the core material input port 42a to the coating powder input port 46a.
It is formed with a gradient such that it gradually increases toward a and further toward the discharge port 52a.

Between the end of the guide 54a and the discharge port 52a, a coating powder separating plate 56a made of a perforated plate for separating the excess coating powder 14 of the coating powder 14 adhering to the metal part 12 is formed. Has been done. Coated powder separating plate 5
The coating powder 14 separated by 6a is put into the tank 44a again and circulated again.

The metal part 12 is a preheat oven 16
The coating powder 14 is heated to a predetermined temperature in the fluid immersion tank 44a, and a proper amount of the coating powder 14 is attached to the surface.
2 is sent from a discharge port 52a to a melt cure oven 60a which is a heating furnace for heating and melting the coating powder 14 through a chute 58a formed in a slope shape.

Also in the fluidized-bed tank 40b, as in the fluidized-bed tank 40a, the surface of the metal part 12 heated to a predetermined temperature in the preheat oven 16 is coated with the coating powder 1
4 is attached in an appropriate amount, and then the metal part 12 is discharged to the outlet 52.
chute 58b discharged from b and formed in a slope shape
Then, the coating powder 14 is sent to a melt cure oven 60a which is a heating furnace for heating and melting the coating powder 14.

Subsequently, the melt cure oven 60a and the melt cure oven 60b will be described mainly with reference to FIGS. 9 is a perspective view showing the melt cure oven 60a, FIG. 10 is an exploded perspective view of the example shown in FIG. 9, and FIG. 11 is a cross section XI-X of FIG.
It is a sectional view solution figure in I. Melt cure oven 6
Reference numeral 0a denotes a steel belt conveyor 62a, which is a conveying device for the metal component 12, extending forward from the chute 58a and the chute 58b, and a steel belt conveyor 62.
In the width direction above the inside of the housing 64a, the housing 64a is formed in a long rectangular tube shape in which an opening through which the steel belt conveyor 62a protrudes is formed so as to cover the periphery of a. A plurality of electric heaters 66a are formed side by side in the traveling direction of 62a.

The steel belt conveyor 62a has its both ends projected from the opening of the housing 64a, and the rear end in the traveling direction mounts the metal part 12 slid down from the chute 58a and the chute 58b. And the front end in the traveling direction constitutes a cooling zone 70a in which the metal part 12 is not heated by the electric heater 66a.

Incidentally, the chute 58a and the chute 58
b is a loading portion 68a of the steel belt conveyor 62a
Further, the final ends thereof are formed in parallel in the traveling direction of the steel belt conveyor 62a so that the metal parts 12 are placed side by side in two rows.

The steel belt conveyor 62a
Uses a steel belt 72a, which is different from the preheat oven 16 and has a thin steel plate formed in an endless annular shape. The steel belt 72a includes a rotary roller 76a and a drive roller rotatably fixed to the base at appropriate intervals at the front and rear ends of a bottomed box-shaped duct 74a formed along the traveling direction of the steel belt 72a. 78a, and is formed so as to cover the entire upper opening 80a of the duct 74a when passing over the upper part of the duct 74a of the steel belt 72a, rotating in the upper longitudinal direction and the lower longitudinal direction of the duct 74a. It is held between a rim portion 82a formed in the upper opening 80a of the duct 74a and a long strip-shaped pressing plate 84a fixed to the long rim portion 82a by a plurality of screws.
Since the spacer 86a, which is slightly thicker than the thickness of the steel belt 72a, is inserted between the mouth edge portion 82a and the pressing plate 84a near the longitudinal outer edge of the steel belt 72a, the steel belt 72a moves vertically. Is substantially fixed, but is movable in the horizontal direction, the duct 74a
So that it passes from the upper opening 80a to the lower bottom.
The driving roller 7 is driven by the driving motor 88a whose base is fixed.
8a is driven and rotated.

Further, the rotating roller 76a has an extension in the traveling direction which occurs when the steel belt 72a is heated,
In order to prevent the steel belt 72a from meandering or warping, an aligning device 90a is attached to the rotating roller 76a, and the rotary shaft of the rotating roller 76a is moved and adjusted in the traveling direction of the steel belt 72a. ing.

In order to send the cooling air from the cooling fan 92a to the duct 74a, a blower port 94a is formed downstream in the traveling direction of the steel belt 72a, and an exhaust port 96a is formed upstream in the upstream direction. Cooling air is blown from the blower port 94a toward the discharge port 96a to cool the steel belt 72a.

As a result, the metal part 12 on the steel belt 72a to which the coating powder 14 adheres can be coated with the coating powder 14 on the surface facing the electric heater 66a without being fused to the surface of the steel belt 72a. You can Further, since the steel belt 72a is held by the pressing plate 84a, the steel belt 72a does not float up due to the wind pressure generated by the cooling air, so that the metal component 12 does not fall over and is stabilized horizontally. The metal part 12 can be transferred by the transfer, and the melted surface does not fuse with the surface of the steel belt 72a.

The temperature of the steel belt 72a is measured by a temperature sensor 98a provided in the duct 74a on the lower surface of the steel belt 72a, and the temperature of the cooling fan 92a is automatically adjusted according to the set temperature. Is configured. Since there is a difference between the surface temperature and the lower surface temperature of the steel belt 72a, in consideration of this, the cooling air from the cooling fan 92a is used so that the surface temperature is set to a temperature lower than the melting point of the coating powder 14. Must be temperature controlled.

A plurality of electric heaters 66a are arranged in parallel and fixed at a suitable distance in the width direction of the casing 64a with a slight distance from the upper surface of the steel belt conveyor 62a. Then, the metal component 12 which is heated by the electric heater 66a and the coating powder 14 is melted and coated on the metal component 12 is sent forward by the steel belt conveyor 62a and cooled in the cooling zone 70a.
The front end of the steel belt conveyor 62a faces the reversing device 100 so as to be inverted and fed into the melt cure oven 60b.

Next, the reversing device 100 will be described with reference to FIGS. 12 is a perspective view showing the reversing device 100, and FIG. 13 is an illustrative view showing a situation in which the metal component 12 is reversed. Reversing device 100
Faces near the end of the steel belt conveyor 62a,
The starting end 100a is formed in an arc-shaped cross section along the shape of the drive roller 78a of the steel belt conveyor 62a,
From a starting end 100a having an arcuate cross section to a straight sliding part 100b
After that, the metal part 12 is placed on the loading portion 68b of the steel belt conveyor 62b of the lower melt cure oven 60b at a relatively slow speed with the front and back of the metal component 12 reversed. In addition, in the width direction center of the downhill part 100b,
A partition plate 100c is formed vertically so that the metal parts 12 arranged in two rows from the melt cure oven 60a and sent in do not mix.

The lower melt cure oven 60b is reversed from the upper melt cure oven 60a in the front and rear of the charging part 68b and the discharge part, and in the front and rear of the rotating roller 76b and the driving roller 78b, and the upper melt cure oven 60b is reversed. Oven 6
0a has substantially the same structure, and the processing step performed in the lower melt cure oven 60b is the same as the melt cure oven 60a except that the heated surfaces of the metal component 12 are opposite. Done.

That is, the metal component 12 charged into the charging section 68b is placed on the steel belt 72b of the steel belt conveyor 62b, and the melt cure oven 60 is loaded.
Move in b. When moving, the surface facing the electric heater 66b is heated by the electric heater 66b and the coating powder 14 is coated on the surface. The surface of the metal component 12 contacting the steel belt 72b is the lower surface of the steel belt 72b. Is cooled by the cooling air blown from the blower port 94b toward the discharge port 96b by the cooling fan 92b, so that it is not fused to the surface of the steel belt 72b. As a result, the entire surface is covered with the coating powder 14.

The temperature of the steel belt 72b is measured by the temperature sensor 98b and the temperature of the cooling fan 92b is automatically adjusted according to the set temperature. Further, the steel belt 72b is adjusted by the aligning device 90b so as not to meander or warp.

In this embodiment, the upper melt cure oven 60a is fixed to the base so that it is located directly above the lower melt cure oven 60b, or the reversing device 10 is used.
The melt cure oven 60a on the upper side and the melt cure oven 60b on the lower side are fixed by shifting in the longitudinal direction.

The metal part 12 whose entire surface is coated with the coating powder 14 is melt-cured in the oven 60b.
Powder 64 in the cooling zone 70b from the housing 64b of
After cooling to a temperature equal to or lower than the melting point of No. 4, two rows of chute 102a and chute 102b formed in a slope shape facing each other are provided, and chute 102a and 102b are provided.
The metal parts 12 falling down are sent to the saucer 104a and the saucer 104b.

Next, a method of coating the metal part 12 with the plastic powder by the coating device 10 will be described.

First, the metal part 12, the material of the plastic powder coating it and the preheat oven 1
6. Set temperatures and the like in the melt cure ovens 60a and 60b will be described. The metal component 12 can be coated as long as it is a metal and has a melting point higher than that of the plastic powder, that is, the coating powder 14, and not only general steel such as SS steel but also shape memory alloy or the like is selected.

If the plastic powder is a resin in a solid state at room temperature, either a thermoplastic resin or a thermosetting resin can be selected. For example, when nylon, which is a typical example of a thermoplastic resin, and epoxy resin, which is a typical example of a thermosetting resin, are selected, the set temperatures and the like are shown in Table 1.

[0049]

[Table 1]

First, the metal parts 12 are placed on the net belt conveyor 18 at regular intervals and preheated in the preheat oven 16. At this time, the preheating temperature must be set according to the heat capacity of the coated metal component, that is, the size of the metal component 12, and the melting point of the plastic material with which the metal component 12 is coated. For that purpose, the atmospheric temperature of the preheat oven 16 is adjusted, or the moving speed of the net belt conveyor 18 is adjusted to change the passage time of the metal component 12 in the preheat oven 16. Further, regarding the shape of the metal component 12, the steel belt conveyor 6
2a and the steel belt conveyor 62b must be selected to have some stability so as not to move freely.

After preheating the metal part 12, the chutes 34a and 34b are slid down and dropped into the fluidized dipping tanks 40a and 40b filled with plastic powder and vibrating, and guided in the tanks 44a and 44b, respectively. When vibrating and flowing through 54a and the guide 54b, the plastic powder 14 is melted by the preheating of the metal part 12 and adheres to the surface thereof.

The metal parts 12 are discharged from the fluidized dipping tanks 40a and 40b, and then the chutes 58a and 5 are respectively discharged.
Steel belt 7 of steel belt conveyor 62a sliding in 8b and moving in melt cure oven 60a
2a. In the melt cure oven 60a, the upper portion of the steel belt conveyor 62a is heated by the electric heater 66a and the steel belt 72a is heated.
Is cooled by the cooling air from the cooling fan 92a. The atmospheric temperature in the oven of the melt cure oven 60a and the surface temperature of the steel belt 72a are automatically adjusted by the temperature sensor 98a. Since the temperature of the steel belt 72a is controlled to be lower than the melting point of the plastic material, the plastic coating powder 14 adhering to the metal component 12 is melted and the steel belt 72a and the metal component 12 are fused. Preventing things.

Thereafter, the metal part 12 is placed in the cooling zone 70a.
After cooling with, the grounding surface to the steel belt 72b is reversed by the metal part 12 sliding down the reversing device 100, and the steel belt 72 of the melt cure oven 60b is reversed.
get on b. In the melt-cure oven 60b, the plastic coating powder 14 that has not been melted in the melt-cure oven 60a faces the electric heater 66b and is heated and melted so that the metal component 12 is coated. After the melt coating, the metal part 12 is cooled in the cooling zone 70b,
Down the chute 102a and 102b, the saucer 10
It is discharged to 4a and 104b.

[Brief description of drawings]

FIG. 1 is a side view diagram showing an embodiment of the present invention.

FIG. 2 is a plan solution view of the example shown in FIG.

FIG. 3 is a plan view showing a net belt conveyor.

FIG. 4 is a sectional schematic view in a section IV-IV of the example shown in FIG. 3;

FIG. 5 is a plan view showing a fluidized immersion tank 40a.

FIG. 6 is a side view solution diagram in the example shown in FIG. 5;

FIG. 7 is a schematic cross-sectional view taken along the line VII-VII in FIG.

FIG. 8 is a schematic cross-sectional view taken along the line VIII-VIII in FIG.

FIG. 9 is a perspective view showing a melt cure oven 60a.

FIG. 10 is an exploded perspective view of the example shown in FIG.

FIG. 11 is a schematic sectional view taken along a line XI-XI in FIG. 9.

FIG. 12 is a perspective view showing the reversing device 100.

FIG. 13 is an illustrative view showing a situation in which the metal component 12 is inverted.

[Explanation of symbols]

 10 coating device 12 metal parts 14 coating powder 16 preheat oven 18 net belt conveyor 20 casing 20a opening 22 electric heater 24 charging section 26 belt 28 roller chain with attachment 30 drive motor 32 rails 34a, 34b chute 36a, 36b slope section 38a , 38b Funnel section 40a, 40b Fluidized immersion tank 42a, 42b Core material charging port 44a, 44b Tank 46a, 46b Coating powder charging port 48a, 48b Vibration motor 50a, 50b Vibration support 52a, 52b Discharge port 54a, 54a Guide 56a Coating Powder separating plate 58a, 58b Chute 60a, 60b Melt cure oven 62a, 62b Steel belt conveyor 64a, 64b Housing 66a, 66b Electric heater 68a, 68b Input part 70a, 70b Rejection zone 72a Steel belt 74a Ducts 76a, 76b Rotating rollers 78a, 78b Drive roller 80a Upper opening 82a Rim 84a Holding plate 86a Spacer 88a Drive motor 90a, 90b Aligning device 92a, 92b Cooling fan 94a, 94a Air outlet , 96b Discharge port 98a, 98b Temperature sensor 100 Reversing device 100a Starting end 100b Sliding part 100c Partition plate 102a, 102b Chute 104a, 104b Receiving tray

Claims (6)

[Claims] 1. A preheated core material is preheated in a preheating furnace, and the preheated core material is placed in a fluidized immersion tank which is filled with coating powder for coating the core material and is vibrating and flowing. A coating method of adhering and then heating the coating powder attached to the core material to fuse the coating powder to the surface of the core material, the method comprising: heating the coating powder attached to the core material; While cooling one surface of the carrier that does not come into contact with the carrier, the coating powder on the surface of the core material placed on the other surface of the carrier is heated to fuse the coating powder to the surface of the core material. A coating method of fusing coating powder. 2. A metal part to be coated is preheated in a preheating furnace, and then the preheated metal part is placed in a fluidized immersion tank filled with plastic powder and vibrating and flowing, and the plastic powder is adhered to the surface of the metal part. And then heating in a heating furnace to fuse the plastic powder to the metal parts, wherein the metal parts are fed from the preheating furnace into the fluidized dipping tank, and the metal to which the plastic powder is attached in the fluidized dipping tank. Parts
Place on the surface of the steel belt that conveys the metal parts, convey the metal parts while cooling the lower surface of the steel belt and heat them in the heating furnace, and heat the plastic that does not contact the steel belt to fuse it to the metal parts. A coating method for fusing a coating powder to the core material according to claim 1. 3. A metal part to which plastic powder adheres is heated in a heating furnace to melt and fuse the plastic powder, and then the metal part is inverted and heated again in the heating furnace of the same method. The coating method of fusing a coating powder to a core material according to claim 2, wherein the plastic powder is fused and fused on the entire surface of the metal component. 4. A preheating furnace for preheating a core material, and a coating powder for covering the core material is filled and vibrated to flow, and the core material preheated in the preheating furnace is put in to deposit the coating powder on the surface of the core material. A core material is provided, which comprises a fluidized dipping tank and a heating furnace that heats the coating powder adhered to the surface of the core material in the fluidized immersion tank to fuse the coating powder to the surface of the core material to coat the core material. In a coating device for fusing powder, a guide is formed between the preheating furnace and the fluidized dipping tank to guide the core material to which the coating powder adheres from the preheating furnace to the fluidized dipping tank. The carrier that heats and transports the core heats the coating powder adhering to the surface of the core material placed on the surface of the carrier that contacts the core material, and the other surface that is not in direct contact with the core material. The temperature at which the coating powder does not melt and harden on the surface in contact with the carrier To keep, is formed so as to heat, the coating apparatus of fusing the coated powder into the core material. 5. A metal part to be coated is preheated in a preheating furnace, the preheated metal part is placed in a fluidized immersion tank filled with plastic powder and vibrating and flowing, and the plastic powder is adhered to the surface thereof. Next, a coating device for heating in a heating furnace to coat the plastic powder, wherein between the preheating furnace and the fluidized dipping tank, the metal parts to which the plastic powder is attached in the preheating furnace are sent to the fluidized dipping tank. The core material according to claim 4, wherein a chute is formed, and in a heating furnace, a metal part coated with plastic powder is placed on a steel belt whose lower surface is cooled and is conveyed and heated. A coating device for fusing powder. 6. The coating apparatus according to claim 5, wherein at least two heating furnaces are formed, and the plastic powder is adhered to the metal parts heated in the previous heating furnace, and then the metal parts are inverted. 6. A reversing device for feeding again into the subsequent heating furnace is provided, and by heating in the front and rear heating furnaces, the entire surface of the metal part is coated with the plastic powder.
A coating device for fusing a coating powder to the core material according to 1.