JP4037974B2 - Coating apparatus and coating method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coating apparatus and method, and more particularly to a technique effective when applied to coating with chocolate or sugar coating liquid.
[0002]
[Prior art]
Conventionally, chocolate-coated foods such as almond chocolate, barley chocolate, and raisin chocolate generally contain a processed object such as almonds in a substantially spherical hollow bread, rotate the bread, and supply chocolate paste there. It was manufactured. In this case, during the coating process, cold air of around 15 ° C. is fed to the object to be processed, and the chocolate supplied into the bread is solidified on the object surface to form a coating layer.
[0003]
Here, in such a coating process, since the bread itself is also cooled by the cold air feeding, a coating substance such as chocolate is solidified and adhered to the inner wall. For this reason, it is necessary to clean the inside of the bread appropriately.For example, in chocolate coating, when the amount of chocolate attached to the inner wall of the bread increases, hot air is fed into the bread to soften and scrape the attached chocolate. It was.
[0004]
In sugar-coated tablets and the like, a coating process is performed by adding a sugar-coating liquid mainly composed of syrup obtained by dissolving sucrose in water and then drying it several tens of times, and stacking the coating layers. Yes. Also in this case, since the sugar coating liquid adheres to the inside of the bread, the next treatment is performed by appropriately cleaning the same.
[0005]
[Problems to be solved by the invention]
In this case, in the conventional chocolate coating using a small bread, the above-mentioned cleaning in the bread is only required to be scraped off with a spatula for about 10 minutes once a day, and because it does not adhere too thickly, it is relatively easy and short. Can be done in time. However, when the coating process is performed using a large drum instead of the conventional pan, the scraping operation in the large drum requires a considerable number of man-hours, and cleaning may take time. This is very inefficient when the coating operation is completed once in about one hour, and the processing using the large drum has a processing capacity ten times as high as that of the operation using the conventional pan. There was a problem that cleaning work became a bottleneck in the work process. In particular, when coating a low-melting-point substance such as chocolate, chocolate easily adheres to the inner wall with pan cooling, and an improvement thereof has been desired.
[0006]
Also, in the case of sugar coating treatment, it is desirable that the coating substance does not adhere to the bread as much as possible from the viewpoint of work efficiency and finished product.
[0007]
An object of the present invention is to provide a coating apparatus and method in which a coating substance such as chocolate is difficult to adhere to a processing container.
[0008]
[Means for Solving the Problems]
A coating apparatus according to the present invention includes a hollow processing container that is rotatably arranged around a rotation shaft, a coating substance supply unit that supplies a coating substance to an object to be processed contained in the processing container, A first air duct that is provided inside the processing container and blows a temperature-controlled processing gas to the processing container; and a temperature of the processing gas that is provided inside the processing container and is ejected from the first air duct. The second air duct that blows the processing gas controlled to a different temperature onto the workpiece, the processing container that is blown with the processing gas from the first air duct, and the processing gas from the second air duct It is characterized in that a predetermined temperature difference is provided between the object to be sprayed and the object to be processed is coated.
[0009]
And this makes it possible to perform the coating process in a state where the temperature of the object to be processed and the rotating container is different. For example, by setting the temperature of the rotating container higher than the object to be processed, Even when the object to be processed is coated with a low melting point substance, the adhesion of the coating substance to the inside of the processing container can be reduced. Therefore, the cleaning operation of the processing container can be greatly reduced, and the coating process can be performed efficiently.
[0010]
In this case, hot air is blown from the first air duct to the processing container, cold air is blown from the second air duct to the object to be processed, and a temperature difference within 10 ° C. is generated between the processing container and the object to be processed. The processing container may be heated with hot air and the object to be processed may be cooled with cold air .
[0011]
In addition, the coating substance may be chocolate or an oleaginous substance. At this time, the temperature difference between the processing container and the object to be processed may be 0.5 to 5 ° C.
[0012]
Still further, cold air is blown from the first air duct to the processing container, hot air is blown from the second air duct to the object to be processed, and a temperature difference within 10 ° C. is generated between the processing container and the object to be processed. The processing container may be cooled with cold air and the object to be processed may be heated with warm air.
[0013]
In addition, the coating apparatus may be a ventilation type coating apparatus configured to allow gas to flow between the inside and the outside of the processing container.
[0014]
On the other hand, in the coating method of the present invention, an object to be processed is accommodated in a hollow processing container rotatably arranged around a rotation axis, and a coating substance is supplied into the processing container to rotate the processing container. A coating method for performing a coating process on the object to be processed by spraying a temperature-controlled processing gas from a first air duct provided inside the processing container to the processing container. A processing gas controlled to a temperature different from the temperature of the processing gas from the first air duct is blown to the object to be processed from the second air duct provided inside, and the processing gas from the first air duct is discharged. coating to the object to be processed with a predetermined temperature difference between the and the processing container to be sprayed, with an object to be processed the processing gas is blown from the second blower duct It is characterized by performing a physical.
[0015]
Thus, for example, by setting the temperature of the rotating container higher than that of the object to be processed, even when a low melting point substance such as chocolate is coated on the object to be processed, the coating substance is placed inside the processing container. Adhesion can be reduced. Therefore, the cleaning operation of the processing container can be greatly reduced, and the coating process can be performed efficiently.
[0016]
In this case, the temperature difference between the processing container and the object to be processed may be within 10 ° C., and the temperature of the processing container is set to be higher than the temperature of the object to be processed by a predetermined temperature. Processing may be performed. Furthermore, a temperature difference may be provided between the processing container and the processing object by heating the processing container with hot air and cooling the processing object with cold air.
[0017]
In addition, the coating substance may be chocolate or an oleaginous substance. In this case, the temperature difference between the processing container and the object to be processed may be 0.5 to 5 ° C.
[0018]
Furthermore, the temperature of the processing container may be lower than the temperature of the object to be processed by a predetermined temperature, and the coating process may be performed. The processing container is cooled by cold air and the object to be processed is heated by hot air. Thus, a temperature difference may be provided between the processing container and the object to be processed. In this case, the coating substance may be a sugar coating liquid such as syrup.
[0019]
In addition, the chocolate said here is the concept containing the fats and oils containing cacao butter like so-called white chocolate in addition to the chocolate containing cacao mass.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 are explanatory views of a coating apparatus according to an embodiment of the present invention. FIG. 1 is a view of the coating apparatus viewed from the side, FIG. 2 is a view of the coating apparatus viewed from the front, and FIG. Each state is shown from the direction. 4 and 5 are explanatory views showing the configuration in the rotating container of the coating apparatus of FIG.
[0021]
The coating apparatus 1 is an apparatus generally referred to as a pan coating apparatus, and performs desired processing such as granulation, coating, drying, and mixing of an object to be processed by rotation of a rotating container and processing gas and coating substance passing therethrough. Is configured to do. The coating apparatus 1 according to the present invention reduces the adhesion of coating substances such as chocolate and sugar coating liquid to the inner wall of the rotating container 3 by setting the rotating container 3 and the workpiece 2 to different temperatures. As a result, the man-hours for cleaning work are reduced and the efficiency of the coating process is improved.
[0022]
Here, the coating apparatus 1 of Embodiment 1 assumes the apparatus which coats the to-be-processed objects 2, such as an almond and a raisin, for example, chocolate, a yoghurt-flavored fats and oils, etc., and accommodates the to-be-processed object 2. FIG. It has a rotating container (coating pan) 3 which is a horizontal drum-shaped processing container. The rotating container 3 includes a hollow main body portion 4 having a polygonal or cylindrical cross-sectional shape, and end wall portions 5 provided on both ends of the main body portion 4 in the axial direction. In FIG. 4, the upper line of the layer 2 of the workpiece 2 indicates the position of the workpiece layer after the coating process, and the lower line indicates the position of the workpiece layer before the process.
[0023]
Ventilation portions 6 through which a processing gas such as hot air or cold air circulates are provided at several places or around the periphery of the main body portion 4. In addition, hot air (for example, about 40 to 50 ° C.) supplied from a first air supply pipe (not shown) is first applied to the rotating container 3 as a heating means in the rotating container 3 to control the temperature of the rotating container 3. A first air duct (first temperature adjusting means) 8 is provided. Further, as the cooling means in the rotating container 3, cold air (for example, about 15 to 20 ° C.) supplied from the second air supply pipe 9 is supplied to the workpiece 2 in the rotating container 3 and the temperature is controlled. A second air duct (second temperature adjusting means) 10 is provided. In addition, an exhaust duct 11 is disposed on the outer peripheral side of the main body portion 4 so as to cover each ventilation portion 6. Then, the processing gas introduced into the rotary container 3 by the first air duct 8 and the second air duct 10 is discharged to the exhaust duct 11 through the ventilation portion 6.
[0024]
In this case, the 1st ventilation duct 8 and the 2nd ventilation duct 10 are arrange | positioned along with the approximate center upper part of the rotation container 3, as shown in FIG. And from the 1st ventilation duct 8, a hot air blows off toward the arrow A direction of FIG. 4, This hot air is discharged | emitted from the ventilation part 6 of the rotation container 3 to the exhaust duct 11. As shown in FIG. In addition, the second air duct 10 blows cold air in the direction of arrow B toward the object to be processed 2, and the cold air passes through the layer of the object to be processed 2 from the vent 6 to the exhaust duct 11. Is discharged.
[0025]
On the other hand, the rotating container 3 rotates in the direction indicated by the arrow X to perform the coating process. For this reason, in the rotating container 3, the part heated by the hot air from the first air duct 8 is then rotated to a position where the workpiece 2 exists and contacts the workpiece 2. At this time, cold air is supplied to the object to be processed 2, and at this time, the temperature of the hot air is adjusted so that a temperature difference of about 10 ° C. or less is generated between the object to be processed 2 and the inner surface of the rotary container 3. ing. In this case, the temperature difference between the rotating container 3 and the object to be processed 2 varies depending on the type of the coating substance, but when the object 2 is coated with chocolate, a temperature difference of 0.5 to 5 ° C. It is preferable to do.
[0026]
In addition, since the hot air from the 1st ventilation duct 8 is discharged | emitted immediately after heating the rotation container 3 by passing the ventilation part 6, the air inside the rotation container 3 is hardly heated by this hot air. Therefore, a cool atmosphere by cold air is maintained in the rotating container 3.
[0027]
The exhaust duct 11 is further connected to an exhaust jacket 23 having a first exhaust port 12 and a second exhaust port 13. The first exhaust port 12 and the second exhaust port 13 communicate with the exhaust duct 11 at a predetermined timing as the rotating container 3 rotates. That is, the exhaust duct 11 and the first exhaust port 12 containing hot air, and the exhaust duct 11 and the second exhaust port 13 containing cold air communicate with each other when the rotary container 3 reaches a specific rotational position. Each exhaust port 12 and 13 is provided. As a result, the hot air is discharged from the first exhaust pipe (not shown) and the cold air is discharged from the second exhaust pipe 14 to the outside of the apparatus through different systems. Therefore, even when the exhaust gas is circulated and used, cold and warm air is not mixed and an excessive burden is not imposed on the cooling device for cold air.
[0028]
Furthermore, several spray guns (coating substance supply means) 15 having a heat retaining function are installed inside the rotating container 3, and the chocolate paste is sprayed onto the workpiece 2 from here in the form of a mist. In this case, hot water is circulated and supplied into the spray gun 15 so that a low melting point substance such as chocolate does not solidify inside. For example, when spraying a chocolate paste of 32 to 36 ° C., hot water of 40 to 45 ° C. is always supplied to prevent the chocolate from solidifying during a work pause or during a spray interval. Thereby, not only the malfunction due to the solidification of the coating substance can be prevented, but also a predetermined amount of the coating substance can be reliably supplied to the object to be processed 2 and the quality of the product can be stabilized. It becomes possible.
[0029]
Further, in the rotary container 3, the coating substance is sprayed as high as possible by the spray gun 15. In other words, after the coating material is applied, the workpiece 2 spreads while being kneaded and rubbed, and is cooled by cold air when it spreads to some extent, so that the coating material is solidified. In addition, as shown in FIG. 4, the baffle 22 is installed in the rotating container 3, so that the undulation and meandering of the workpiece 2 in the rotating container 3 can be suppressed.
[0030]
On the other hand, rotating shafts 17a and 17b supported by bearings 16a and 16b are coaxially attached to both ends of the rotating container 3, and the rotating container 3 is installed to be rotatable around the rotating shafts 17a and 17b. ing. The rotating shaft 17b is driven by a motor 18 via a chain 19. In this case, the first air supply pipe and the first air duct 8, the second air supply pipe 9, the second air duct 10 and the second exhaust pipe 14 are fixed, and the rotary container 3 and the exhaust duct 11 are rotated by the motor 18. The In addition, in FIG. 1, an opening 20 that is used for charging the granular material, discharging the product, and the like is provided in a substantially central portion of the left end wall 5, and on the outside of the opening 20. An inspection lid 21 that can be opened and closed is provided.
[0031]
Next, the coating process in the coating apparatus according to the present invention will be described taking the production of almond chocolate as an example. Here, first, almonds are put into the rotating container 3 as the object 2 to be processed, and the motor 18 is driven to move the rotating container 3 in the arrow X direction (forward direction, see FIG. 4) through the chain 19 and the rotating shaft 17b. Rotate to Thereby, in the rotating container 3, as shown in FIG. 4, the almond is mainly lifted in the rotational direction along the main body portion 4 and a part of the end wall portion 5, and falls inwardly. Done. And a chocolate film is solidified and formed on an almond by spraying cold air from the second air duct 10 while spraying a chocolate paste from the spray gun 15, and an almond chocolate is manufactured.
[0032]
Here, in the coating apparatus 1 according to the present invention, during the coating process, the rotary container 3 is heated by hot air of about 50 ° C. blown from the first air duct 8, while the almond is fed from the second air duct 10. Cool air of about 20 ° C. is blown and cooled. At this time, the rotating container 3 is set so that the heated portion rotates to a position where the almond rolls, and is 1 to 2 ° C. higher than the almond when it contacts the almond. Since the temperature of the rotating container 3 decreases due to contact with the almonds, if the temperature difference at the beginning of the contact is about 2 ° C., the temperature is about 1 ° C. near the center of the almond layer, and is slightly higher at the contact end portion. Become. However, these changes can be appropriately adjusted according to the temperature difference at the beginning of contact, and the above-mentioned numerical values are just examples, and the present invention is not limited thereto.
[0033]
In this case, chocolate has the property of adhering to lower temperatures. For this reason, the chocolate in the rotating container 3 adheres to the almond side, which is cooler, and hardly adheres to the inner wall surface of the rotating container 3. Moreover, what adhered to the inner wall of the rotating container 3 will also adhere to that side when the colder almond contacts. Therefore, almost no chocolate adheres to the inner surface of the main barrel portion of the rotating container 3, and the scraping work is greatly reduced. On the other hand, in the conventional coating apparatus, since the object to be processed and the processing container have substantially the same temperature, the chocolate adheres to the inner surface of the rotating container as well as the almond, and the scraping operation as described above is required.
[0034]
Conventionally, in sugar coating such as tablets or film coating, hot air of about 60 to 80 ° C. is supplied to the object to be processed to dry the surface of the object to be coated. At that time, the temperature of the object to be treated is lowered by the latent heat of vaporization accompanying the drying of the coating agent, so that the inside of the object to be treated layer is 30 ° C., whereas the exhaust is about 40 ° C. There is a natural temperature difference between the two. However, in a chocolate coating or the like that takes a form in which the coating is not dried by evaporation but is cooled and hardened, there is no latent heat of vaporization, so there is no temperature difference between the object to be processed and the processing container. That is, the coating apparatus 1 according to the present invention, unlike the natural temperature difference that occurs in coating such as sugar coating, actively causes a temperature difference in the coating process without the latent heat of vaporization, so that the coating material having a low melting point can be obtained. The adhesion to the processing container is reduced.
[0035]
As described above, according to the coating apparatus and method of the present invention, the two air ducts 8 and 10 are provided in the rotating container 3, thereby setting a temperature difference between the rotating container 3 and the workpiece 2. By doing so, when coating a low-melting-point material such as chocolate, the temperature of the rotating container 3 is set higher than that of the object to be processed 2, thereby reducing the adhesion of the coating substance to the inner surface of the processing container. it can. Accordingly, the man-hours for cleaning the container can be greatly reduced, and the coating process can be performed efficiently. For this reason, in the coating apparatus having a large rotating container, cleaning of the inside of the container, which has been a problem in the past, can be made efficient, and productivity of the coating process can be improved.
[0036]
(Embodiment 2)
Next, as a second embodiment of the present invention, a case where a sugar coating or enteric or sustained release substance is applied to a tablet or food will be described. In addition, since the structure of the apparatus is the same as that of the coating apparatus 1 of Embodiment 1, the detail is abbreviate | omitted.
[0037]
In sugar coating treatment of tablets, as described above, hot air is supplied to the object to be processed to dry the surface of the object to be processed, and there is also a gap between the object to be processed and the processing container. There is a natural temperature difference. However, in the coating apparatus 1, by providing the two air ducts 8 and 10 in the rotating container 3, a temperature difference is positively given to both, and the processing efficiency and adhesion of the coating substance to the rotating container are provided. Is decreasing.
[0038]
In this case, the heating means and the cooling means are opposite to those in the first embodiment, and the first air duct 8 is the cooling means and the second air duct 10 is the heating means. That is, cold air is supplied from the first air duct 8 to cool the rotary container 3, while hot air is supplied from the second air duct 10 to heat the workpiece 2. Thereby, the temperature of the rotating container 3 and the to-be-processed object 2 is controlled by the cold air or the hot air fed from the first air duct 8 or the second air duct 10, and between the rotating container 3 and the object to be processed 2. A temperature difference will occur.
[0039]
Therefore, as an example, a sugar coating process for tablets using the coating apparatus 1 will be described. Here, tablets such as medicines and health foods are accommodated in the rotating container 3 as the object to be processed 2, and the rotating container 3 is rotated in the arrow X direction by the motor 18. As a result, the tablet rolls in the rotating container 3 as described above, and a sugar coating liquid mainly composed of syrup in which white sugar is dissolved in water is sprayed from the spray gun 15.
[0040]
At this time, in the process, hot air of 60 to 80 ° C. is supplied from the second air duct 10, while cold air of about 15 to 20 ° C. is supplied from the first air duct 8 to the rotary container 3. Is done. At this time, the rotating container 3 is set so that the cooled portion is rotated to a position where the tablet rolls, and the temperature is 0.5 to 2 ° C. lower than the tablet when it contacts the tablet. The temperature of the rotating container 3 rises due to contact with the tablet and the flow of hot air. Therefore, if the temperature difference at the beginning of contact is about 2 ° C., it is about 1 ° C. near the center of the tablet layer and slightly higher at the contact end. The temperature is about the same. However, these changes can be appropriately adjusted according to the temperature difference at the beginning of contact, and the above-mentioned numerical values are just examples, and the present invention is not limited thereto.
[0041]
In this case, the moisture in the sugar coating liquid tends to evaporate as it adheres to the tablet having a higher temperature, and the sugar coating liquid sprayed into the rotary container 3 adheres to the tablet side and solidifies by drying. It adheres to the tablet surface and hardly adheres to the inner wall surface of the rotating container 3. Moreover, what adhered to the inner wall of the rotating container 3 will also adhere to the side when a higher temperature tablet contacts. Therefore, the sugar coating liquid hardly adheres to the inner surface of the main body of the rotating container 3, and the scraping work is greatly reduced. On the other hand, in the conventional coating apparatus, since the coating process is performed due to a temperature difference that naturally occurs between the object to be processed and the processing container, the sugar coating liquid easily adheres to the inner surface of the rotating container as well as the tablet. Work is required.
[0042]
As described above, according to the coating apparatus 1 of the present invention, the two air ducts 8 and 10 are provided in the rotating container 3, so that a temperature difference is set between the rotating container 3 and the workpiece 2. As a result, when the sugar coating liquid or the like is coated, the temperature of the rotating container 3 is set lower than that of the object 2 to be processed, so that the coating substance can be reduced from adhering to the inner surface of the processing container. Accordingly, the man-hours for cleaning the container can be greatly reduced, and the coating process can be performed efficiently.
[0043]
As mentioned above, although the coating apparatus which is one embodiment of this invention was demonstrated, it cannot be overemphasized that this invention can be variously changed in the range which is not limited to the said embodiment and does not deviate from the summary.
[0044]
For example, a temperature difference between the rotating container 3 and the object to be processed may be detected by a sensor, and the heating means may be feedback controlled based on the value.
[0045]
Furthermore, the form of the coating apparatus itself is not limited to the above-described ventilation type, and can be applied to a coating apparatus that does not allow a processing gas to flow. In addition, it is possible to adopt a method of heating a conventional pan with warm air, hot water, a heater or the like. Further, not only a configuration in which the ventilation portion 6 is provided in the main body portion 4 and hot air is passed therethrough, but a configuration in which the processing gas is circulated from the front and back of the rotating container 3 may be employed.
[0046]
On the other hand, the object to be treated in the present invention is not limited to the foods such as almonds described above, and can also be applied to pharmaceutical products such as tablets. In addition, the coating substance can be applied to not only chocolate but also oleaginous white chocolate, oleaginous substances such as wax having a low melting point, enteric substances, sustained-release substances, and the like. Furthermore, sugar coating liquids of various specifications such as syrups in which sugar is dissolved in water as well as those to which various medicinal ingredients, flavors, pigments and the like are added can be applied.
[0047]
【The invention's effect】
According to the coating apparatus and method of the present invention, the two air ducts are provided in the rotating container, thereby setting the temperature difference between the rotating container and the object to be processed, thereby performing the coating process. Even when a low melting point material such as chocolate is coated, the adhesion of the coating material to the inside of the processing container can be reduced by setting the temperature of the rotating container higher than that of the object to be processed. Accordingly, the number of man-hours for cleaning the container can be greatly reduced, and the coating process using the rotating container can be performed efficiently. For this reason, even in a coating apparatus having a large rotating container, the efficiency of in-container cleaning, which has been a problem in the past, can be realized, and the productivity of the coating process can be improved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram when a coating apparatus according to an embodiment of the present invention is viewed from a side surface direction.
FIG. 2 is an explanatory diagram when the coating apparatus of FIG. 1 is viewed from the front.
FIG. 3 is an explanatory diagram when the coating apparatus of FIG. 1 is viewed from the back side.
4 is an explanatory diagram showing a configuration inside a rotating container of the coating apparatus of FIG. 1, and is a state in which the rotating container is viewed from the front.
FIG. 5 is an explanatory diagram showing a configuration inside the rotating container of the coating apparatus of FIG. 1, and is a state in which the rotating container is viewed from above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coating apparatus 2 Object to be processed 3 Rotating container
4 Main trunk portion 5 End wall portion 6 Ventilation portion 8 First air duct (first temperature adjusting means)
9 Second air supply pipe 10 Second air duct (second temperature adjusting means)
11 exhaust duct 12 first exhaust port 13 second exhaust port 14 second exhaust pipe 15 spray gun (coating substance supply means)
16a, 16b Bearings 17a, 17b Rotating shaft 18 Motor 19 Chain 20 Opening 21 Inspection lid 22 Baffle 23 Exhaust jacket

Claims (16)

A hollow processing vessel disposed rotatably about a rotation axis;
A coating substance supply means for supplying a coating substance to an object to be processed contained in the processing container;
A first air duct that is provided inside the processing vessel and blows a temperature-controlled processing gas to the processing vessel;
A second air duct that is provided inside the processing container and blows a processing gas controlled to a temperature different from the temperature of the processing gas ejected from the first air duct to the workpiece;
A coating process is performed on the processing object by providing a predetermined temperature difference between the processing container to which the processing gas from the first air duct is blown and the processing object to which the processing gas from the second air duct is sprayed. A coating apparatus characterized by performing. 2. The coating apparatus according to claim 1, wherein hot air is blown from the first air duct to the processing container, cold air is sprayed from the second air duct to the object to be processed, and the processing container and the object to be processed are between. A coating apparatus, wherein the processing container is heated with hot air so that a temperature difference within 10 ° C. occurs, and the object to be processed is cooled with cold air . 3. The coating apparatus according to claim 2 , wherein the coating substance is chocolate. 4. The coating apparatus according to claim 2 , wherein the coating substance is an oily substance. Coating and wherein the at coating apparatus according to claim 3 or 4, wherein the temperature difference between the processing object and the processing vessel is 0.5 to 5 ° C.. 2. The coating apparatus according to claim 1, wherein cold air is blown from the first air duct to the processing container, hot air is blown from the second air duct to the object to be processed, and the space between the processing container and the object to be processed. A coating apparatus characterized in that the processing container is cooled with cold air and the object to be processed is heated with hot air so that a temperature difference of 10 ° C. or less occurs. The coating apparatus according to claim 6 , wherein the coating substance is a sugar coating liquid. In the coating apparatus of any one of Claims 1-7, an exhaust duct is arrange | positioned so that the ventilation part formed in the said process container may be covered outside the said process container, The said 1st ventilation duct and the said The coating is characterized in that the processing gas blown from each of the second air ducts is discharged to the exhaust duct through the ventilation portion, and the processing gas can flow between the inside and the outside of the processing container. apparatus. An object to be processed is accommodated in a hollow processing container rotatably disposed around a rotation axis, and a coating substance is supplied into the processing container to rotate the processing container. A coating method for performing a coating process,
A processing gas whose temperature is controlled is blown from the first air duct provided inside the processing container to the processing container, and the processing from the first air duct is performed from the second air duct provided inside the processing container. A processing gas controlled to a temperature different from the temperature of the gas is sprayed on the object to be processed, and the processing gas from which the processing gas from the first air duct is sprayed and the processing gas from the second air duct are sprayed. coating method and performing a coating process on the article to be treated with a predetermined temperature difference between the object to be processed to be. The coating method according to claim 9 , wherein hot air is blown from the first air duct to the processing container, cold air is blown from the second air duct to the object to be processed, and the processing container and the object to be processed are between. A coating method, wherein the processing container is heated with hot air so that a temperature difference within 10 ° C. occurs, and the object to be processed is cooled with cold air . The coating method according to claim 10 , wherein the coating substance is chocolate. The coating method according to claim 10 , wherein the coating substance is an oleaginous substance. The coating method according to claim 11 or 12 , wherein a temperature difference between the processing container and the object to be processed is 0.5 to 5 ° C. 10. The coating method according to claim 9 , wherein cold air is blown from the first air duct to the processing container, hot air is blown from the second air duct to the object to be processed, and the space between the processing container and the object to be processed. The coating method is characterized in that the processing container is cooled with cold air and the object to be processed is heated with warm air so that a temperature difference of 10 ° C. or less is generated. 15. The coating method according to claim 14 , wherein the coating substance is a sugar coating liquid. The coating method according to any one of claims 9 to 15 , wherein an exhaust duct disposed outside the processing container so as to cover a ventilation portion formed in the processing container, A coating method , wherein the processing gas blown from each of the second air ducts is discharged through the ventilation portion .

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