JPH07136577A - Formation of powder coating film - Google Patents

Abstract

PURPOSE:To firmly form a powder coating film excellent in characteristics by forming an adhesive layer on a part, vibrating a mixture of the part, powder, etc., to form a powder coating film on the surface of the part and then heat- treating the substance forming the adhesive layer to cure or remove the substance. CONSTITUTION:An adhesive layer is firstly formed on every kind of part, when a powder is deposited on the surface of the part to form the powder coating film. For example, the part W placed on a net basket t1 is dipped in a liq. material in a tank t2 and dried to form an adhesive layer on the part W. A mixture of the part, powder and film forming medium is then vibrated or agitated to form a powder coating film on the part surface. For example, the mixture T contg. the part W is placed in a vessel C set on a vibrator V, and the vessel is vibrated to form a powder coating film on the part W. The substance constituting the adhesive layer is then heat-treated and cured or removed. For example, the part W is conveyed by a belt conveyor h3 in a heat-treating passage h2 provided with a heater h1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder film forming method for forming a film by depositing powder on the surface of various parts or articles used in various industrial fields.

[0002]

2. Description of the Related Art Conventionally, as a method for depositing powder on the surfaces of various parts or articles (hereinafter, simply referred to as "parts") used in various industrial fields to form a film, preheating is performed. Disperse powder on parts and attach them by powder mist,
After that, a powder coating method in which the powder is melted to form a film, and the powder is brought into contact with a part to which tackiness has been given in advance, and vibration is applied to the part to adhere the powder to form a film. Method, spray the powder with a suitable resin medium to the parts by spraying to form a film, and then cure the resin to form a film by spray coating method or immerse the parts in a liquid in which charged powder is suspended Then, by applying a voltage to the component from an external power source, the charged powder is attracted to the component, the component is covered with the powder, and then the powder is melted to form a film. Various powder film forming methods are known.

[0003]

In the above-mentioned conventional method for forming a powder film, since the powder is simply melted and cured in a state of being attached to a component, the film is formed. Because the binding force of powder to parts and the binding force of powder particles are weak, the coating film is easily peeled off. Also, because the binding force of powder particles is weak, the coating film has pores (bore) that reach the surface of the component. ) Exists, and therefore the corrosion resistance of the parts is reduced, or when a film is applied so as to have the function of insulating property, conductive property, etc., such a function cannot be sufficiently fulfilled. There was a problem.

The object of the present invention is to solve the problems of the conventional methods for forming a powder film as described above, and to form a powder film having improved performance such as corrosion resistance and surface smoothness. It is to provide a method for forming a powder film.

[0005]

In order to achieve the above object, the present invention provides a step of forming an adhesive layer on a part on which a powder film is formed, a part on which an adhesive layer is formed, a powder and a film. A powder film forming step of forming a powder film on the surface of a component on which an adhesive layer is formed by subjecting a mixture composed of a forming medium or the like to vibration or stirring treatment, and for curing or removing the substance forming the adhesive layer Final heat treatment step, a method of forming a powder film, a step of forming an adhesive layer on a part on which a powder film is formed, a part formed with an adhesive layer, and a mixture of powder and a film forming medium. Alternatively, a powder film forming step of forming a powder film on the surface of the part on which the adhesive layer is formed by performing a stirring process, heating the part on which the powder film is formed, and partially or completely removing the powder. Intermediate heat treatment step of melting or softening, Powder film formation consisting of a powder agglomeration step of colliding particles with molten or softened powder to agglomerate the powder at a high density and a final heat treatment step for curing or removing the substance constituting the adhesive layer The method and the step of forming an adhesive layer on the part on which the powder coating is formed, the adhesive layer is formed by subjecting the mixture including the part on which the adhesive layer is formed, the powder and the film forming medium to vibration or stirring. A powder film forming step of forming a powder film on the surface of the formed part, and then an intermediate heat treatment step of heating the part on which the powder film is formed to melt or soften a part or all of the powder A powder coating that re-forms a powder coating on the surface of a component by subjecting a mixture of a component, powder and a film-forming medium, in which some or all of the powder is melted or softened, to vibration or stirring. Predetermined forming process After a few practice,
The present invention relates to a method for forming a powder film, which carries out a final heat treatment step for curing or removing a substance forming an adhesive layer.

Examples of the present invention will be described below, but the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

The essential steps constituting the powder film forming method of the present invention are (a) a step of forming an adhesive layer for adhering powder on the surface of a component on which the powder film is formed (hereinafter, simply (Also referred to as "adhesive layer forming step"), (b) a powder coating is formed on the surface of the component by subjecting a mixture of the component on which the adhesive layer is formed, powder, film-forming medium, etc. to vibration or stirring. (Hereinafter, also simply referred to as "powder coating forming step"), (c) A component on which a powder coating is formed mainly for curing the resin or the like used for forming the adhesive layer. Process of heat treatment (hereinafter simply referred to as "final heat treatment process")
Also called. ).

Further, as an additional step for further improving various performances of the powder coating by appropriately adding to the above-mentioned indispensable steps, (d) peeling of the powder coating or powder In order to prevent the above, the heat treatment is applied to the part on which the powder coating is formed in the powder coating forming step (b) described above to melt or soften a part or all of the powder, and The step of strengthening the bonding force (hereinafter, also simply referred to as "intermediate heat treatment step"), (e) The intermediate heat treatment step of (d) above makes a part or all of the powder into a molten or softened part. There is a step of colliding particles to agglomerate and densify the powder (hereinafter, also simply referred to as “powder aggregating step”).

The respective steps (a) to (e) described above will be described below. First, the essential steps (a) to (e) are to be described.
(C) will be described.

(A) Adhesive Layer Forming Step In the powder film forming method of the present invention, first, an adhesive layer having an adhesive force necessary for powder adhesion must be formed on a predetermined surface of a component. The adhesive layer can be formed of an uncured resin or other liquid or semi-liquid substance, but it is preferable to use an uncured resin such as epoxy or phenol and various monomers. Further, the substance forming these adhesive layers is preferably cured by heating, but it does not necessarily have to be cured,
It may be a substance that evaporates when heated. Also,
When the component or the surface layer of the component is a resin, the surface of the resin may be dissolved with a solvent to form an adhesive layer. In addition,
For convenience, in the following description of the embodiments of the present invention,
Mainly, the case where a resin that is cured by heating is used is shown.

The adhesive layer having an adhesive force formed on the surface of the component can be formed by simultaneously subjecting the component, the powder, and the film-forming medium described later to the substance for forming the adhesive layer to vibrate or stir. However, it is also possible to previously form an adhesive layer on the surface of the component. When an adhesive layer is formed on the surface of the part in advance, the vibration or stirring process is
It is applied to parts, powders, film-forming media and the like on which an adhesive layer is formed. Further, the thickness of the adhesive layer is appropriately set depending on the thickness of the film to be formed, the material of the powder or the film forming medium, and the like. For the sake of convenience, in the description of the embodiments of the present invention to be described later, the case where a component having an adhesive layer formed in advance is used is shown.

(B) Powder Film Forming Step The component on which the adhesive layer is formed is put into a vibrating device or a stirrer filled with a film forming medium composed of powder and particles, etc. A powder film will be formed. With parts, powder, etc. on which the above-mentioned adhesive layer is formed,
The film-forming medium that is subjected to vibration or stirring treatment strikes the powder adhering to the adhesive layer on the surface of the component, presses or presses the powder into the adhesive layer, and more firmly adheres the powder to the adhesive layer. A substance which has a function and which pushes the powder adhering to the adhesive layer to push the substance forming the adhesive layer below the powder onto the surface of the powder, and further the substance forming the extruded adhesive layer. Has a function of adhering the powder to the surface of the component in a multi-layered manner and with high density, and further, when the film forming medium to which the powder adheres collides with the component,
The powder adhered to the film-forming medium is transferred to the part, which is a kind of transfer work, and has the function of promoting strong adhesion of the powder to the surface of the part. Even if the film forming medium hits the powder adhered to the adhesive layer, the adhesion of the powder to the parts stops when the adhesive layer below the powder is no longer extruded onto the surface, that is, the powder film The formation will be completed.

The adhesion of powder to the surface of a component by a kind of transfer operation in which the powder adhering to the film-forming medium is transferred to the component is caused by a large number of film-forming media as will be described later. Since they collide with the surface of the component evenly, a uniform powder adhesion layer is formed on the surface of the component, and therefore a uniform film can be formed on the component.

The film-forming medium described above will be described below. The film-forming medium has a function of generating a striking force to mediate the formation of a film. However, the film-forming medium itself is essentially a component of the film. I won't.

It is important that the film-forming medium be substantially smaller in size than the part and substantially larger in size than the powder. A film-forming medium that is larger than the part cannot hit the surface of the part uniformly, and if it is smaller than the powder, the film-forming medium itself is trapped in the formed powder film. It is not preferable. However,
A film-forming medium larger than the component may be contained as long as the volume ratio of the entire film-forming medium is 70% or less.

When the striking force is concentrated to some extent, press-fitting or pressing of the powder into the adhesive layer is promoted. For example, when a spherical film-forming medium is used, its diameter should be 0.3 mm or more. It is more preferably 0.5 mm or more. When using a film-forming medium having another shape, it is preferable to comply with this. Also, "the film-forming medium is smaller than the part" means that, when each of the film-forming media is replaced by a sphere of the same volume, the diameter is smaller than the largest of the parts delivered. Is. However, when it is necessary to form a film on a deep recess or a sharp corner inner surface, a film forming medium having a diameter of about 0.1 mm may be used. In this case, it is desirable that the film-forming medium is made of a material having a density as high as possible so that the film-forming medium is not captured by the adhesive layer. . Furthermore, if the average size of the powder satisfies the above-mentioned requirements, a desired striking force can be generated. That is, even if some of the particles forming the film-forming medium are smaller than the powder, if the film-forming medium has an average size larger than the powder, a desired striking force can be generated. However, since a film-forming medium finer than these powders may be incorporated in the film, it is desirable that the medium is not included as much as possible.

Further, it is important that the material of the film forming medium described above satisfies the following requirements. That is, it is important that there is no large change in shape that can be visually recognized by observing the film forming medium after the powder film is formed, and that the elastic deformation is not extremely large in the process of forming the powder film. It is not preferable to manufacture the film forming medium with a material such as soft rubber. Further, although some wear due to long-term use is unavoidable, it is important that cracking, chipping, sudden wear, etc. do not occur. If a film-forming medium of a material that does not meet these requirements is used, the film-forming medium will undergo plastic deformation or extremely large elastic deformation such as soft rubber due to collision with parts. Therefore, the impact force applied to the parts is insufficient and the desired powder film is not formed. Also, if cracking, chipping, or sudden wear occurs, the service life of the film-forming medium will be shortened, and the productivity of parts with a powder film will be improved.
It is not preferable in terms of workability or economy.

The film forming medium is iron, carbon steel, other alloy steels, copper and copper alloys, aluminum and aluminum alloys, other various metals and alloys, or Al ₂ O ₃ , SiO _2.
Made of ceramics such as ₂ , TiO ₂ , ZrO ₂ , SiC,
Glass and further hard plastic can be used. Further, a hard rubber can be used as long as a sufficient striking force is applied at the time of forming the powder film.
The size, material and the like of these film forming media can be appropriately selected according to the shape and size of the parts, the material of the powder used and the like. Furthermore, a film forming medium having a plurality of sizes and materials may be mixed and used, or the film forming medium may be subjected to a surface treatment or a surface film for use. Further, a composite film forming medium composed of a plurality of the above materials may be used.

In order to alleviate and average the striking force, and to suppress the homogeneity of the formed powder film and the variation in film thickness,
A soft film-forming medium such as wood powder, soft rubber, and soft plastic may be appropriately mixed with the hard film-forming medium, but such a soft film-forming medium has a volume of the entire film-forming medium used. It is preferably 50% or less of the ratio. Since these soft film-forming media alone cannot generate an effective striking force, they are used together with the hard film-forming media. It is also possible to form a film of a cured resin, an uncured resin or a volatile liquid on the surface of the film forming medium. Such a coating once promotes the uniform adhesion of the powder to the surface of the film-forming medium, and then removes the powder from the surface of the film-forming medium during vibration or stirring to adhere the powder to the parts. Let Through such a process, the powder adheres to the surface of the component more uniformly.

The above-mentioned film-forming medium is spherical, elliptical,
A cube, a triangular prism, a cylinder, a cone, a triangular pyramid, a quadrangular pyramid, a rhombohedron, an irregular shape, and other various shapes can be used, and the film-forming media having these shapes can be used alone or in an appropriate mixture. You can also do it.

(C) Final heat treatment step One purpose of the step of performing the final heat treatment on the part on which the powder coating is formed is to cure or remove the liquid substance remaining in the powder coating used for forming the adhesive layer. However, another purpose is to increase the binding force between the powders forming the powder coating or between the powder coating and the component by thermal diffusion.

The heat treatment temperature is preferably not higher than the melting point of the powder and is about ⅓ or higher of the melting point. Since the heat treatment temperature must be lower than the melting point of the component, the heat treatment step is applied to the component made of a substance having a melting point higher than the heat treatment temperature. Also,
Such heat treatment can be performed in the atmosphere, but when the powder is a substance having low rust resistance, it is preferably performed in vacuum or in an inert gas.

(D) Intermediate heat treatment step Next, in order to prevent peeling of the powder coating or powder, which is one of additional steps that are appropriately added to the above-mentioned essential steps, if necessary. The intermediate heat treatment step of strengthening the bonding force between the powders by heat-treating the part on which the powder coating is formed by the powder coating forming step (b) to melt or soften a part or all of the powders. Will be described.

As described above, in this step, the parts to which the powder adheres are heated to near or above the melting point of the powder,
By at least partially melting or softening the powder, or in the case of a mixed powder consisting of different types of powder substances, melting or softening at least one type of powder substance, In addition to preventing separation from the film, strengthening the bond between the powders to strengthen the film, and by filling the voids in the film with a molten substance, a high-density powder film with few pores, Further, by smoothing the powder coating, various properties of the powder coating are improved to form a high quality powder coating.

The melting point referred to herein does not have to be a physically well-defined melting point, and may be a temperature above the softening point of the powders and above the temperature at which the powders start to coalesce due to surface tension. . Further, it is not necessary that the entire powder is melted by heating, but only the vicinity of the surface of the powder may be melted and the powders may be united.

Generally, a powder made of a substance having a low melting point has a property of easily adhering to itself by a strong impact. When the powder coating is formed by the method of the present invention using only the powder having a low melting point, the powder coating is thickly formed on the portion of the film forming medium where the hitting frequency is high, and the powder coating is formed on the portion where the hitting frequency is low. If the part is thin and has a hollow portion such as a ring shape, the inner-outer circumference difference of the film thickness is large, or the variation in the film thickness between the parts is large, or The irregularities on the surface of the powder coating become severe. The powder that does not melt by heating suppresses the direct adhesion of the powders to each other regardless of the applied adhesive layer, suppresses the unlimited increase of the film thickness, and the thickness of the adhesive layer to which the film thickness is first applied. Will be decided by. In this way, the variation in the film thickness is reduced and the film thickness can be easily controlled.

By the way, when heat treatment is performed after forming the powder film, if the viscosity of the melted powder is excessively lowered due to overheating, the melted powder may be liquefied or droop, or This causes problems such as deterioration of the surface smoothness. Therefore, preferably, after forming the powder film, the powder substance that does not melt when heated to a predetermined temperature (hereinafter,
It is also simply referred to as "non-melted powder". ) Is mixed with a powder substance that is melted by heating at a predetermined temperature (hereinafter, also simply referred to as “molten powder”), and the powder substance that is melted into a liquid penetrates into the powder coating layer. Then, it is preferable that the molten powder substance is prevented from being liquefied and hanging down, and that a stronger powder film is formed.

Further, the powder substance which is not melted by heating plays a role of a shape stabilizing material of the powder coating layer, impairing the smoothness of the surface of the component, or supporting the component on the bottom surface of the component. It is possible to prevent the support member arranged on the substrate, for example, a net-like trace of the net-like support member. Furthermore,
The powder that does not melt even after heating is dispersed in the powder coating to improve the hardness of the powder coating. As powder materials that do not melt by heating, there are inorganic pigments such as TiO ₂ and red iron oxide that are used in various coatings. Such pigments improve the functions such as appearance and anticorrosion in the powder film after heating. Also exerts. On the other hand, as the powder that melts by heating, epoxy,
Resin powders such as acrylic and polyester, and metal or inorganic powders having a low melting point can be used.

It is important that the powder is harder than the substance forming the adhesive layer formed on the surface of the part, for example, the uncured resin, and as a result, the powder is uncured during the vibration or stirring process. It becomes possible to press into an adhesive layer such as, and a stronger powder film can be formed. As the powder, it is possible to use all kinds of resin powders, metal powders, or inorganic substance powders alone, or to use two or more kinds of them in combination. Further, in order for the powder to be incorporated into the powder film formed on the surface of the component, it is important that the powder is smaller than the film forming medium.

It is preferable to use a flat powder as the above-mentioned non-melted powder. Here, the flat powder (hereinafter,
Simply called "flat powder". ) Is a disk, a flat plate, a curved plate, or the like, which has a substantially flat surface and which is the main constituent surface of the powder. Preferably, the relationship between the distance H between the opposed flat surfaces and the average diameter (diameter when converted into a circle of the same area) D of the flat surfaces is H / D <1.
/ 2, more preferably H / D <1/4, and most preferably H / D <1/6. Such flat powder has the effect of making the film thickness of the powder coating uniform.

The flat powder can be formed by using the above-mentioned metal or the like. As the flat powder,
It is also possible to use a substance that becomes flat by cleavage, such as mica or BN. Flat powder diameter D is 300μ
The thickness is preferably m or less, and if it exceeds this dimension, the uniformity of the film thickness decreases. More preferred dimensions are 150 μm or less, most preferably 70 μm or less. Further, the smaller the diameter D is, the more uniform the film thickness is. However, if the diameter D is too small, the effect of uniform film thickness of the flat powder is reduced.
Is 0.1 μm or more, preferably 1 μm or more.

Further, it is preferable to mix an anti-blocking material into the powder so that the powder does not aggregate.
As the blocking preventing agent having such an action, carbon black, micron-sized synthetic silica, Teflon powder (1 μm or less), zinc stearate powder and the like can be used. By mixing such an anti-blocking agent, it is possible to prevent the powder from agglomerating, so that the agglomerated powder is taken into the powder coating and the thickness of the powder coating becomes uneven. Can be prevented.

The particle size of the powder varies depending on the strength of vibration or stirring, the size of parts, the thickness of the powder film to be formed, the material of the powder, and the like. It is preferable that the particle size is small in the case of powder that is hard and difficult to deform such as ceramics powder, and may be larger than that in the case of metal powder that is rich in ductility, but it is generally in the range of 0.01 to 500 μm. Preferably,
The range of 0.01 to 300 μm is more preferable, and 0.01
More preferably, it is in the range of 100 μm. Generally, the smaller the particle size of the powder, the easier the powder is to be captured by the adhesive layer.
Further, particles having a small particle size are easily pushed by impact between the powders dispersed on the adhesive layer, and therefore, the powders are liable to be pressed and bonded to each other or parts due to plastic deformation. The smaller the particle size, the smaller the impact force, and the smaller the surface roughness of the powder coating. (E) Powder agglomeration step By the intermediate heat treatment step of (d) described above, the particles are made to agglomerate and densify by colliding the particles with a part or part of the powder in a molten or softened state. The process of doing will be described.

The above-mentioned intermediate heat treatment increases the binding force between the powders, but it is not the binding force between the powders and the parts or the state of the final coating in which the powders are tightly bound, so to speak,
The powder is temporarily fixed.

The particles are collided or projected onto such a part in which the powder is temporarily fixed, and the powder film in the temporarily fixed state of the powder is compressed to form the powder film. A powder agglomeration treatment is performed so that the constituent powders become more agglomerated and have a higher density.

In the powder agglomeration process, it is preferable to use a vibration device similar to the vibration device used in the powder film forming process described later. Further, as the particles, particles of various metals, ceramics, glass, or hard plastics are used, like the above-mentioned film forming medium, and the particles are powders in a state where the powders are temporarily fixed. It is necessary to have such a weight, size and strength as to apply a striking force capable of colliding with the film and agglomerating the temporarily fixed powder to make it more dense.

Particles vibrating by the vibrating device collide with the powder coating to give a striking force to the powder coating, and the powder forming the powder coating is more agglomerated and densified. A high-density powder film in which the body is agglomerated is formed.

Further, when the melted or softened powder is hit by the particles, the non-melted powder is more aggregated, the pores (bore) disappear, and the molten powder spreads over the entire powder film. , A homogeneous and strong powder film is formed. Furthermore, since the powder film in the temporarily fixed state is hit evenly by the particles, the surface of the powder film is smoothed and a powder film with a flatter surface can be formed. Become. As described above, the impact force is applied to the powder coating in both the powder coating forming step and the agglomeration step of the temporarily fixed powder, so that a stronger and smoother powder coating is formed. You can In the powder agglomeration process, the powder is agglomerated by heating a little,
Higher density can be further promoted.

The above-described powder agglomeration step is particularly effective when a mixed powder of a molten powder and a non-melted powder is used and the ratio of the non-melted powder is high. That is, in such a case, since the amount of the molten powder as an adhesive medium for adhering the non-melted powders to each other is small, the powder coating of the molten or softened molten powder is hit by the particles. As a result, the molten powder in the molten or softened state is spread to every corner between the non-melted powders, and the non-melted powders mainly constituting the powder film are melted or softened through the melted powders. Adhesion becomes strong, so that a strong powder film is formed, and it is possible to prevent the holes (bore) from remaining in the powder film.

On the other hand, when the ratio of the molten powder is large,
Most of the powder existing around the non-melted powder is a molten powder in a molten or softened state. Since the non-melted powders are sufficiently adhered to each other via the interposition, a strong powder film can be formed.

Next, a concrete means or device for each of the above steps will be described. First, the means for forming the adhesive layer will be described. FIG. 1 shows a so-called soaking method for forming an adhesive layer, which is a component W housed in a net basket t1.
Is immersed in a liquid substance tank t2 containing a liquid substance such as the above-mentioned liquid or semi-liquid resin forming an adhesive layer, and then the net cage t1 is taken out from the liquid substance tank t2. Part W
The liquid substance adhered to is dried naturally or by air blown from a blower to form an adhesive layer on the surface of the component W.

FIG. 2 shows a means for forming a pressure-sensitive adhesive layer by a spray method, in which a component W conveyed by a belt conveyor t3 is put into a net-made rotary drum t4 having a spiral protrusion t4 'provided on its inner wall. A liquid substance is attached to the component W by the liquid substance sprayed from the spray port t5 ′ of the spray device t5 arranged near the entrance in the rotary drum t4 made of a net. The part W to which the liquid substance is attached is the rotary drum t.
No. 4, which is transferred upward along the spiral protrusion t4 ′, and is naturally dried or dried by the air sent from the blower t6, then is carried out from the rotary drum t4 and placed on the belt conveyor t7. . Then, it is conveyed to the powder film forming apparatus described later. Of course, belt conveyor t7
It is also possible to directly supply the component W having the adhesive layer formed thereon, which is carried out from the rotary drum t4, to the powder film forming apparatus provided at the outlet of the rotary drum t4, without arranging.

By the way, the liquid substance tank t2 as described above.
The liquid substance attached to the surface of the part W taken out from
This is one cause of partial accumulation on the surface of the part W, forming a so-called liquid pool, which makes the thickness of the adhesive layer uneven. If the thickness of the adhesive layer is not uniform, the component W
The thickness of the powder film formed on the surface of the is uneven. The means for making the thickness of the adhesive layer uniform will be described below.

In this embodiment of the adhesive layer forming process,
A state in which a liquid substance that forms an adhesive layer is adhered to both the component and the adhesive layer leveling medium to be described later, and then the same adhesive layer leveling medium to which the liquid substance is applied is mixed with the component to which the liquid substance is applied. Then, the component to which the liquid substance is attached and the adhesive layer leveling medium are vibrated or agitated to dry the liquid substance to form the adhesive layer on the component.

Adhesive layer having a liquid substance attached to form a pressure-sensitive adhesive layer and an adhesive layer leveling medium having a liquid substance attached thereto are mixed, and an adhesive having a liquid substance attached thereto is attached to the component having a liquid substance attached thereto. By vibrating or agitating the layer leveling medium, the adhesive layer leveling medium collides with the component and hits the component, so that liquid pools etc. of the liquid substance formed on the surface of the component are removed and dried. The pressure-sensitive adhesive layer in the process or after being dried is beaten by the pressure-sensitive adhesive layer leveling medium to eliminate the unevenness of the thickness of the pressure-sensitive adhesive layer, so that a uniform pressure-sensitive adhesive layer can be formed.

In this step, the reason why the liquid substance is adhered to the adhesive layer leveling medium is that the adhesive layer leveling medium to which the liquid substance is not attached and the part to which the liquid substance is attached are mixed and vibrated or stirred. When applied, the liquid substance attached to the component is transferred to the adhesive layer leveling medium on which the liquid substance is not attached, and the adhesive layer formed on the component becomes thin, or the adhesive layer is removed from the surface of the component. This is because problems such as peeling are caused.

As the adhesive layer leveling medium, the same film forming medium as described above can be used. Regarding the material, size, weight, etc. of the adhesive layer leveling medium, the material and size of the parts can be used. Etc., or the type of liquid substance, etc. can be taken into consideration and can be appropriately selected. Of course, as in the case of the film forming medium, it is possible to mix and use several kinds of media.

Next, a more specific adhesive layer forming means will be described with reference to FIG. 3 which is a process diagram of the above-mentioned adhesive layer forming means. In FIG. 3, t8 is an adhesive layer leveling medium m
Is a gutter-shaped or tubular transfer device having a supply port t8 ′ of the same, and a vibration device t9 is attached to the transfer device t8,
The vibrating device t9 is configured to convey the adhesive layer leveling medium m by vibrating the conveying device t8. Reference numeral t10 denotes a component supply device disposed in the middle of the transfer device t8. The component supply device t10 is arranged so that the component W can be input into the component input port t10 ′ of the transfer device t8. It can be configured by a known component supply device or the like. In addition, the above-mentioned transfer device t8
Can also be constituted by a conveyor such as a belt conveyor.

Reference numeral t11 denotes a spraying device for spraying a liquid substance forming an adhesive layer onto the adhesive layer leveling medium m and the component W transported by the transporting device t8.
The spray port t11 ′ of 11 is arranged near the adhesive layer leveling medium m of the transport device 1 and the discharge port t8 ″ of the component W,
Due to the vibration of the transfer device t8, the liquid substance is evenly sprayed onto the adhesive layer leveling medium m and the parts W that are ejected from the discharge port t8 ″. It is also possible to construct an appropriate flow of the substance and apply this flow to the component W and the adhesive layer leveling medium m.

T12 is a net cylinder t12 'having a mesh of a size that does not allow the component W and the adhesive layer leveling medium m to pass through.
Is a rotary transfer device in which a spiral protrusion t12 ″ is provided on the inner wall of the cylinder and is rotated by an appropriate drive means (not shown). The rotary transfer device t12 is such that the axis of the cylindrical body t12 ′ is inclined upward. The reference numeral t13 denotes a blower provided near the outside of the rotary transport device t12, and the liquid substance attached to the adhesive layer leveling medium m and the component W transported by the rotary transport device t12. In order to dry the air, room temperature air or warm air is blown to the adhesive layer leveling medium m and the component W. The rotary transport device t12.
However, if the adhesive layer leveling medium m and the liquid substance attached to the component W have a sufficient length to naturally dry, the air blower t13 may be omitted. In addition,
The discharge port t8 ″ of the transfer device t8 and the spray port t11 ′ of the spray device 4 described above are the net-shaped cylindrical body t of the rotary transfer device t12.
It is arranged inside the entrance side of 12 '.

An extra liquid substance other than the liquid substance attached to the adhesive layer leveling medium m and the component W, for example, the rotary transport device t.
The liquid substance or the like that drops as drops from the twelve mesh cylinder t12 'is appropriately collected and reused, and the solvent or liquid substance that evaporates is also collected and recycled, and is repeatedly used.

At t14, the component W having the adhesive layer formed thereon, which is carried out from the rotary transport device t12, is accommodated. The component receiver having a mesh that allows the adhesive layer leveling medium m to pass through but does not allow the component W to pass through. The device is configured to vibrate by a suitable vibrating device t15 in order to facilitate sieving of the component W and the adhesive layer leveling medium m. t16 is a component receiving device t14 arranged below the component receiving device t14.
It is a storage box for storing the adhesive layer leveling medium m that has been sieved off by. The adhesive layer leveling medium m collected in the storage box t16 is again subjected to the washing process and the like, and then again conveyed by the transport device t.
It is preferable to be configured so as to be returned to the supply port t8 ′ of No. 8. Reference numeral t17 denotes a powder film forming apparatus having a container C arranged on the above-mentioned vibration device V, and a component receiving device t
The part W on which the adhesive layer formed from 14 is formed is the container C.
It is arranged at a position where it will drop into.

The operation of the adhesive layer forming apparatus configured as described above will be described. Supply port t of the transport device t8
The adhesive layer leveling medium m supplied from 8 ′ is the vibration device t9.
Are successively conveyed by the vibration of the parts W, and the parts W are conveyed by the conveyor t.
8 is inserted into the component input port t10 ′ from the component supply device t10 disposed in the middle of 8 and is appropriately supplied to the transport device t8. The adhesive layer leveling medium m and the component W are mixed on the transport device t8, and the transport device is transported. The sheet is conveyed in the direction of the outlet t8 ″ at t8.

A liquid substance is sprayed onto the adhesive layer leveling medium m and the part W carried out from the discharge port t8 ″ of the transporting device t8 by the spraying device t11, and the adhesive layer leveling medium m and the part W are sprayed.
Liquid substances are evenly attached to the.

The adhesive layer leveling medium m to which the liquid substance is attached and the component W are sent to the rotary transport device t12, and the rotary transport device t12 is rotated to agitate the adhesive layer leveling medium m and the component W. The liquid substance attached to the adhesive layer leveling medium m and the component W is dried. In this step, as the adhesive layer leveling medium m and the part W are agitated, the part W to which the liquid substance adheres is struck by the adhesive layer leveling medium m, so that the liquid substance liquid on the surface of the part W As well as removing the pool, the liquid substance during drying or the adhesive layer after drying is evenly hit by the adhesive layer leveling medium m, so that the non-uniform portion of the liquid substance or the adhesive layer is removed and the adhesive layer becomes uniform. A part W having a smooth adhesive layer having a thickness is obtained.

The part W on which the adhesive layer having a uniform thickness is formed, together with the adhesive layer leveling medium m, is rotated and conveyed by the t12.
Then, it is transferred to the vibrating mesh-made component receiving device t14 for sieving the component W and the adhesive layer leveling medium m, and the adhesive layer leveling medium m is transferred to the mesh of the component receiving device t14. The adhesive layer leveling medium m, which has passed through the eyes and is accommodated in the storage box t16 arranged below and thereafter having the adhesive layer formed,
It is sent to the step of removing the adhesive layer and reused.

On the other hand, the component W on which the adhesive layer leveling medium m is sieved off by the component receiving device t14 and the remaining adhesive layer is formed is the powder and the film forming medium placed on the vibrating device V. The mixture T is put into a container C containing the same, and the powder film forming step is started.

FIG. 4 is a process diagram showing another embodiment of the adhesive layer forming apparatus. In this embodiment, the adhesive layer leveling medium m is used.
And a net basket t18 having a mesh that does not allow the parts W to pass through,
It is placed on a conveyor belt t19 such as a belt conveyor, and the adhesive layer leveling medium feeding device t20 feeds the adhesive layer leveling medium m to the net basket t18, and the component feeding device t21 feeds the component W.

The net basket t18 into which the adhesive layer leveling medium m and the parts W have been put is dipped in the liquid substance tank t22 to adhere the liquid substance to the adhesive layer leveling medium m and the parts W.

Next, the adhesive layer leveling medium m and the component W, to which the liquid substance is adhered, contained in the net basket t18 coming out of the liquid substance tank t22, and the component W are vibrating device t23 arranged in the lower part of the transport band t19. Vibration treatment is performed by the conveyor belt t19 that is vibrated by, and the liquid substance is naturally dried or dried by the blower t24. After that, by an automatic machine such as a robot (not shown), the component W in which the uniform adhesive layer is formed and the adhesive layer leveling medium m housed in the net basket t18 are transferred from the net basket t18 to the net-made component receiving device described above. After being transferred to t14, the adhesive layer leveling medium m passes through the mesh of the component receiving device t14 and is accommodated in the storage box t16 arranged below, and the component W on which the adhesive layer is formed is added. The mixture T of the powder and the film forming medium arranged on the shaking device V is put into a container C and the powder film forming step is started. Similar to the embodiment shown in FIG. 3, the liquid substance, the solvent, or the adhesive layer leveling medium m is recycled and repeatedly used.

The pressure-sensitive adhesive layer forming apparatus is not limited to the above-described embodiment in which the pressure-sensitive adhesive layer is formed on the component W by continuous processing, but the pressure-sensitive adhesive layer can be formed on the component W by batch processing. . Further, the component W and the adhesive layer leveling medium m are directly placed on the net-like conveyor which is vibrating by an appropriate vibrating device, and the component W and the adhesive layer placed on the net-like conveyor during the transfer. The liquid W is sprayed on the leveling medium m, and the parts W are generated by the vibration of the conveyor.
Also, the liquid substance can be dried by a blower while vibrating the adhesive layer leveling medium m. After that, the component W having the adhesive layer formed thereon and the adhesive layer leveling medium m are transferred to a conveyor having a mesh having a size that allows the adhesive layer leveling medium m to pass through, but does not allow the component W to pass through, and then the adhesive layer leveling medium m is passed. The part W on which the medium m is sieved off and the adhesive layer left on the conveyor is formed
Can also be configured to be placed in a container C, which is placed on the vibrating device V and in which a mixture T of the powder and the film-forming medium is stored.

In addition, the adhesive layer leveling medium m is put together with the component W in the net basket t1 shown in FIG.
2 and then take out the net basket t1 from the liquid substance tank t2, and then vibrate or agitate the adhesive layer leveling medium m and the component W to which the liquid substance adheres to obtain a uniform thickness of the component W. It can also be configured to form a pressure sensitive adhesive layer.

Next, a vibrating device for vibrating a mixture of parts, a powder, a film-forming medium and the like provided with an adhesive layer will be described.

The vibrating device used in the powder film forming step has an adhesive layer formed on the surface of a container C placed on the vibrating device V, as shown in FIG. 5 as an example. A mixture T such as the part W and a film forming medium is put into the container C, and the container C is vibrated by the vibrating device V to form a powder film on the surface of the part W.

The container C is made of a hard material such as hard synthetic resin or metal, and is formed in a bowl shape having an opening c1 in the upper portion as shown in FIG. 5 as an example. The columnar part c reaching the vicinity of the opening c1 by bulging the central part of the bottom c2 of the container C upward.
3 is projected.

In FIG. 5, F is a machine base of the vibrating device V, and a diaphragm v3 is arranged on the machine base F via coil springs v1 and v2, and is projected on the diaphragm v3. The columnar portion c3 of the container C is attached to the upper end of the vertical axis v4. A motor v5 is attached to the lower surface of the diaphragm v3, and a weight v7 is attached to the output shaft v6 of the motor v5.
Are eccentrically attached. Therefore, since the eccentric weight v7 is rotated by rotating the motor v5, the container C is vibrated via the vertical axis v4 attached on the vibration plate v3.

In the above powder film forming step, the powder adhered directly to the component having the adhesive layer formed on the surface or through the film forming medium is hit by the film forming medium to form the adhesive layer. The pressure-sensitive adhesive layer is adhered firmly by pressing or press-fitting and is hit by the film-forming medium, so that the adhesive layer covered with the powder is extruded onto the surface of the powder, and the film-forming medium is further formed on the extruded adhesive layer. The powder adhering to the parts moves to the adhesive layer of the parts when the film forming medium collides with the parts, and the adhesion of the powder to the parts progresses. And
Even if the component is hit by the film-forming medium, when the pressure-sensitive adhesive layer is no longer pushed out to the surface of the powder, the substantial powder adhesion step, that is, the powder film formation is completed.

FIG. 6 shows a vibrating device V having a spiral conduit as the vibrating device V. v8 is the vibration device V
Also, v9 is a bottomed outer cylinder, and the base v8 and the outer cylinder v9 are an appropriate number of coil springs v10.
Are connected by. v11 is a bottom surface v of the bottom of the outer cylinder v9
9'is a vibration motor attached to the vibration motor v
An oscillating body v12 is attached to the output shaft of the shaft 11.

Reference numeral v13 denotes a spiral conduit body, and a discharge conduit v14 extending upward in a substantially straight line is continuously provided from an uppermost spiral conduit v13 'of the spiral conduit body v13.
The outlet v14 ′ of the discharge pipe line v14 forms a discharge port for the component W on which the powder film is formed, the film forming medium, the powder, and the like. Below the outlet v14 ′, a film having a mesh of a size that allows the film forming medium and powders to pass therethrough but does not allow the parts W on which the powder film has been formed to pass therethrough. A reticulated belt conveyor v15 is provided for selecting the parts W on which the powder coating is formed from the forming medium and the powder.

Reference numeral v16 denotes a powder supply conduit extending upward from the lowermost spiral conduit v13 ″ of the spiral conduit main body v13, and the upper end opening v16 ′ of the powder supply conduit v16 is charged with powder or the like. Forming a mouth, v17 is a powder supply pipe line v16
Is a recovery pipe line that is continuously provided in the middle of the above, and the opening v17 ′ at the end of the recovery pipe line v17 is arranged so as to face the outlet v14 ′ of the discharge pipe line v14 and the mesh belt conveyor v15.

Similarly, v18 is a component supply pipeline connected in the middle of the powder supply pipeline v16.
The opening at the end of 18 forms a loading port v18 'for the component W.

The spiral conduit main body v13 and the like as described above are filled with a film forming medium, powder and the like, and the spiral conduit main body v13 and the like drive the above-mentioned vibration motor v11 to generate a vibration motor. It is vibrated by rotating the vibrating body v12 attached to the output shaft of v11.

An adhesive layer is formed on the surface of the spiral pipe main body v13 and the like which are filled with the film forming medium, powder and the like as described above, from the inlet v18 'of the component W of the component supply pipeline v18. Then, the parts W that have been processed are put in. Parts W thrown in
Goes down through the powder supply pipe line v16 to descend the spiral pipe body v
13 reaches the bottom spiral conduit v13 ″ and then rises along the spiral conduit body v13.
The film W is discharged from the outlet v14 ′ of the discharge line v14 onto the mesh belt conveyor v15 together with the film forming medium and the powder, but the part W having the adhesive layer formed on the surface of the part W has the spiral line body v13 and the like. While being transferred, the powder film is formed based on the above-described powder film forming principle.

The parts W on which the powder film is formed, the film forming medium, the powder and the like are carried out from the outlet v14 'of the discharge conduit v14, but cannot pass through the mesh of the mesh belt conveyor v15. The part W on which the powder coating is formed is
The net-like belt conveyor v15 separates the film-forming medium and powder from the film-forming medium and places them on the net-like belt conveyor v15, and then the net-like belt conveyor v15 conveys them to the subsequent processing step. In addition, the film-forming medium and the powder which have passed through the mesh of the mesh belt conveyor v15 are
It enters the opening v17 ′ at the end of the recovery conduit v17 and is returned to the spiral conduit main body v13.

During the continuous operation of continuously performing the powder film forming process on the component W, the powder existing in the spiral pipe main body v13 of the vibrating device V is adhered to the component W as a powder film. The powder is continuously consumed from the upper end opening v16 ′ of the powder supply conduit v16 at a constant speed so that the powder present in the spiral conduit main body v13 and the like is always substantially constant. . In this way, when the powder film is continuously formed on the component W, the thickness and quality of the powder film can be kept constant.

FIG. 7 shows a vibration device V having a stirring plate as the vibration device V. v19 is a vibration device V
The container is placed on the base v20 of the above, and a stirring blade v22 rotated by a motor v21 is arranged in the container v19. Therefore, the component W having the adhesive layer formed thereon, the film forming medium, the powder, and the like are put into the container v19, and then the motor v21 is driven to rotate the stirring blade v22, whereby the powder as described above is obtained. A powder film is formed based on the film formation principle. Next, the heat treatment furnace used in the intermediate heat treatment step and the final heat treatment step will be described. As the heat treatment furnace, an ordinary box-shaped heat treatment furnace can be used to heat-treat the parts on which the powder coating is formed in a so-called batch method. FIG. 8 shows an example of the heat treatment apparatus H. As shown in FIG. 8, the heat treatment apparatus H uses a heat treatment furnace h2 having a heater h1 having an inlet and an outlet arranged on both sides,
By arranging a belt conveyor h3 that conveys the component on which the powder coating is formed in the heat treatment furnace h2, the heat treatment can be continuously performed. Note that h1 ′ is a power source capable of controlling the temperature of the heater h1.

As the heater h1, in addition to the usual resistance heating type, an infrared radiation type heating system can be used. In the latter case, for example, only one side of the part W can be heat-treated first, and then the part W can be turned over and the other side can be heat-treated. In this way, it is possible to prevent the trace of the support member supporting the component W from being attached to the component W during heating due to the gravity of the component W.

Next, the above-mentioned essential steps of the present invention (a) adhesive layer forming step, (b) powder film forming step,
The combination of (c) the final heat treatment step, and (d) the intermediate heat treatment step and (e) the powder agglomeration step, which are appropriately and selectively adopted as needed, will be described.

(1) The first combination consists of only the above-mentioned essential steps. That is, after the adhesive layer is formed on the surface of the component W in the adhesive layer forming step, the component W having the adhesive layer is supplied to a vibrating device containing powder, a film forming medium, etc. Form a body coat. afterwards,
A final heat treatment is applied to the part W on which the powder film is formed to obtain the part W having the hardened powder film. Such a powder film forming method consisting of only essential steps has a small number of treatment steps, and is therefore used for forming a powder film at a low cost, which is easy to prevent the magnets from shedding particles.

(2) The following combinations are (a) adhesive layer forming step + (b) powder film forming step + (d) intermediate heat treatment step +
This is a combination of (e) powder agglomeration process + (c) final heat treatment process. That is, after the adhesive layer is formed on the surface of the component W in the adhesive layer forming step, the component W having the adhesive layer is supplied to a vibrating device containing powder, a film forming medium, etc.
A powder film is formed on. After that, the part W on which the powder film is formed is heated to melt or soften a part or all of the powder, and then the particles similar to the film forming medium vibrating by the vibrating device are melted as described above. Alternatively, the powder coating collides with the softened powder coating to give a striking force to the powder coating, so that the powder is more agglomerated and a higher density powder coating is formed.
After that, the final heat treatment is applied to the part W having the powder film formed thereon to obtain the part W having the hardened powder film.

By adding an intermediate heat treatment step and a powder agglomeration step to the above-mentioned essential steps,
It is possible to form a relatively thin powder film having high corrosion resistance. In addition, defects such as electrical short circuits can be prevented as the electric insulating film, and higher gloss can be obtained when used as a decorative film.

(3) The following combinations are (a) adhesive layer forming step + (b) powder film forming step + (d) intermediate heat treatment step +
It is a combination of (b) powder film forming step + (c) final heat treatment step. In this combination, after the adhesive layer is formed on the surface of the component W in the adhesive layer forming step, the component W having the adhesive layer formed thereon is supplied to a vibrating device containing powder, a film forming medium, etc. A powder film is formed on W. After that, an intermediate heat treatment step of heating the part on which the powder film is formed to melt or soften part or all of the powder, and forming the part, the powder, and the film on which part or all of the powder is melted or softened The powder film forming step of forming a powder film again on the surface of the component by subjecting the mixture composed of the medium or the like to vibration or stirring is performed once or plural times, and finally, the final heat treatment step described above. It is to be implemented.

As described above, by performing the powder film forming treatment twice or more, for example, defects such as pores (bore) generated in the powder film of the first layer are generated in the powder film of the second layer. Due to the effect of being removed by the method, it is possible to form a thick powder film having very few defects, high corrosion resistance, and so on. Further, as an electric insulating film, a decorative film or a film for various other purposes, a higher quality film is formed as compared with the above-mentioned single layer film.

(4) The next combination is (a) adhesive layer forming step + (b) powder film forming step + (d) intermediate heat treatment step + (b) powder film forming step + (d) intermediate heat treatment. Process +
This is a combination of (e) powder agglomeration process + (c) final heat treatment process. In this combination, the intermediate heat treatment is performed after the powder film forming step of (3) described above twice or more, and a part or all of the powder formed by the powder film forming processing of two or more times is melted. Alternatively, the particles that are softened and then vibrated by the vibrating device collide with the molten or softened powder coating to give a striking force to the powder coating, resulting in more agglomeration of the powder. And a powder film with higher density is formed. After that, the final heat treatment is applied to the part W having the powder film formed thereon, and the part W having the hardened powder film is obtained.
Is obtained.

By the powder film forming method with such a combination, it is possible to form a thick powder film further excellent in corrosion resistance. Also, not only as a corrosion resistant film,
The highest quality film can be formed as an electric insulating film, a decorative film or a film for various other purposes.

Although the above-mentioned four combinations are shown as examples of the present invention, the present invention is not limited to such combinations and may be applied to the application of the parts on which the powder film is formed, the use conditions, and the like. Various combinations can be adopted accordingly.

Next, as an example, (a) adhesive layer forming step + (b) powder film forming step + (d) intermediate heat treatment step + (b) powder film forming, which is a combination of the above-mentioned (4). Process + (d) Intermediate heat treatment process + (e) Powder agglomeration process +
(C) A powder film forming apparatus to which the final heat treatment step is connected will be described with reference to FIG. The process up to the step of forming the adhesive layer is the same as the device described with reference to FIG.

In FIG. 9, a vibrating device V1 having a spiral conduit shown in FIG. 6 is used in place of the vibrating device V for vibrating the container C shown in FIG. The component W on which the powder film has been formed by the vibrating device V1 is discharged from the vibrating device V1 and then selected from the powder and the film forming medium by the mesh belt conveyor v23 and conveyed to the intermediate heat treatment device Hi. In FIG. 9, the mesh belt conveyor v23 also serves as the belt conveyor of the intermediate heat treatment apparatus Hi.

The part W having the powder film formed thereon, which was placed on the mesh belt conveyor v23, was manufactured by the intermediate heat treatment apparatus Hi.
The heater h4 heats the powder until a part or all of the powder is melted or softened, and then the connecting conveyor v
After passing through 24, the powder is agglomerated by being put into a vibrating device V2 having a spiral pipe line in which particles similar to those of the film forming medium are stored. In addition, h4 'is a power supply of the heater h4.

Thereafter, the parts W which have been subjected to the powder agglomeration treatment by the vibrating device V2 are sorted out from the particles by the reticulated belt conveyor v25 and are conveyed to the final heat treatment device Hf. As with the mesh belt conveyor v23 described above, the mesh belt conveyor v25 is the final heat treatment device Hf.
Also used as a belt conveyor.

The part W having the powder film formed thereon, which is placed on the mesh belt conveyor v25, is the final heat treatment device Hf.
The heater h5 of No. 3 hardens or removes the resin and the like present in the powder coating to form the final component W on which the powder coating is formed.
Becomes In addition, h5 'is a power source of the heater h5.
Then, the final part W is stored in an appropriate storage box B.

[0092]

Since the present invention is constructed as described above, it has the following effects.

A strong powder coating can be formed on the surface of the component by combining the steps of the adhesive layer forming step, the powder coating forming step, and the final heat treatment step.

By adding an intermediate heat treatment step and a powder agglomeration step to the adhesive layer forming step, powder film forming step and final heat treatment step, it is possible to form a thin powder film having high corrosion resistance.

After the adhesion layer forming step and the powder film forming step, an appropriate number of intermediate heat treatment steps and powder film forming steps are added again to further enhance the corrosion resistance and to obtain a desired thickness. It is possible to form a powder film having

After the adhesive layer forming step and the powder film forming step, an appropriate number of intermediate heat treating steps and powder film forming steps are added again, and further, an intermediate heat treating step and a powder agglomerating step are added. This makes it possible to form a powder film having a high corrosion resistance and a desired thickness.

By performing the powder film forming treatment twice or more, for example, defects such as pores (bores) generated in the first layer powder film are removed by the second layer powder film. Due to such effects, it is possible to form a thick powder film having excellent corrosion resistance. Further, a higher quality film is formed as an electric insulating film, a decorative film or a film for various other purposes.

[Brief description of drawings]

FIG. 1 is a schematic view of an adhesive layer forming apparatus as an example used for carrying out the method of the present invention.

FIG. 2 is a schematic view of another adhesive layer forming apparatus used for carrying out the method of the present invention.

FIG. 3 is a process drawing of another adhesive layer forming apparatus used for carrying out the method of the present invention.

FIG. 4 is a process drawing of still another adhesive layer forming apparatus used for carrying out the method of the present invention.

FIG. 5 is a front view including a partial cross section of an example of a vibration device used for carrying out the method of the present invention.

FIG. 6 is a front view including a partial cross section of another vibration device used for carrying out the method of the present invention.

FIG. 7 is a front view including a partial cross section of still another vibrating device used for carrying out the method of the present invention.

FIG. 8 is a schematic view of a heat treatment apparatus used for carrying out the method of the present invention.

FIG. 9 is a process drawing showing an example of a powder film forming apparatus used for carrying out the method of the present invention.

[Explanation of symbols]

 C ・ ・ ・ ・ Container Hf ・ ・ ・ Final heat treatment device Hi ・ ・ ・ Intermediate heat treatment device V ・ ・ ・ ・ Vibration device W ・ ・ ・ ・ Parts

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Nagata 1 Elie Part 2 No. 401, Intermetalix Co., Ltd. 22-22 Matsumuro Ouegamicho, Nishikyo-ku, Kyoto City, Kyoto Prefecture

Claims (4)

[Claims] 1. A step of forming an adhesive layer on a part on which a powder film is formed, and an adhesion by vibrating or stirring a mixture of the part on which the adhesive layer is formed, powder and a film forming medium. A method for forming a powder film, comprising: a powder film forming step of forming a powder film on the surface of a part on which a layer is formed; and a final heat treatment step of hardening or removing a substance forming an adhesive layer. . 2. A step of forming an adhesive layer on a part on which a powder film is formed, and a step of vibrating or stirring a mixture of the part on which the adhesive layer is formed, powder and a film forming medium. A powder film forming step of forming a powder film on the surface of the part on which the layer has been formed, an intermediate heat treatment step of heating the part on which the powder film is formed and melting or softening a part or all of the powder, It is characterized by comprising a powder aggregating step of causing particles to collide with the molten or softened powder to agglomerate the powder at a high density and a final heat treatment step for curing or removing a substance constituting the adhesive layer. And a method for forming a powder film. 3. A step of forming an adhesive layer on a part on which a powder film is formed, and an adhesive by vibrating or stirring a mixture of the part on which the adhesive layer is formed, powder and a film forming medium. A powder film forming step of forming a powder film on the surface of a part on which a layer is formed, and then an intermediate heat treatment for heating a part on which the powder film is formed to melt or soften a part or all of the powder. Powder that re-forms a powder film on the surface of a component by subjecting a mixture of parts, powder and film-forming medium, etc., in which a part and all of the powder has been melted or softened, to vibration or stirring. A method for forming a powder film, which comprises performing a body film forming step a predetermined number of times and then performing a final heat treatment step for curing or removing a substance forming the adhesive layer. 4. An intermediate heat treatment step of heating a part on which a powder film is formed to melt or soften part or all of the powder, and a part or powder in which part or all of the powder is melted or softened. After performing a powder film forming step of forming a powder film again on the surface of the component by vibrating or stirring the mixture composed of the body and the film forming medium and the like a predetermined number of times,
The part on which the powder film is formed is heated again to perform an intermediate heat treatment step of melting or softening a part or all of the powder, and the particles are collided with the melted or softened powder to form the powder. The powder film forming method according to claim 3, further comprising a powder aggregating step of aggregating at a high density.