JPH01315329A - Method for preventing coating base from sticking to coating pan, and its coating device - Google Patents

Abstract

PURPOSE:To prevent small particles, etc., from being generated on the inner wall of coating pan and on the buffle plate during the coating of sugar coat in the coating pan by carrying out the temp. control of the coating pan part where the coating base is apt to stick and grow. CONSTITUTION:The rotatable coating pan 10 disposed with baffle plated 11 is provided with the means 15 adjusting the temp. of inner wall and the means 11a cooling baffle plates 11. And, the temp. of the coating part where the coating base is apt to stick and grow during the coating of sugar coat in the rotated coating pan 10 is controlled to prevent the coating base from sticking and growing. As a result, the base agent of coating liquid is eliminated from sticking to the pan wall and the baffle plates. Consequently, the small particles, etc., generated by the sticking of the base agent are prevented from generating, and the projected tablets generated by sticking of these particles, etc., are prevented from generating.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a method for preventing a coating base from adhering and growing on the inner wall of a coating pan used for coating tablets, confectionery, etc., and a coating method. Regarding equipment.

[Conventional techniques and coating pans are generally used to coat tablets, confectionery, or similar products with sugar coatings to facilitate smooth transfer, coat the coating base evenly and uniformly on the product, and improve appearance. In order to prevent the ventilation portion of the coating pan from being blocked, a buckle plate is disposed inside the coating pan (see, for example, Japanese Patent Publication No. 60-25181).

[Problem to be solved by the invention] However, each time the sugar coating is coated, the coating base adheres to the inner wall of the coating pan and the baffle plate and grows, and when the number of coatings exceeds the limit, the inner wall and The base material adhered to the buckle plate forms a thick layer, and due to frictional impact with the product, it falls off the pan wall and becomes small particles. These small particles are extremely likely to adhere to the product in the coating pan, and repeated coatings will cause
There was a problem in that it adhered to the product and formed large, medium, and small protrusions, impairing the appearance of the sugar-coated product and significantly reducing its quality.

In addition, in order to eliminate the negative effects of small particles generated during coating, if signs of small particle generation are observed, the operator should temporarily stop the coating process and sift out the small particles contained in the product from the coating pan. It is necessary to periodically wash off the coating base that has adhered to the walls of the coating pan and the baffle plate after taking it out. However, this operation is very cumbersome, especially in the case of a coating pan equipped with a baffle plate, which not only makes the inside of the pan complicated and troublesome to clean, but also makes it difficult to know when to clean, and the process may stop temporarily. However, there were also problems in that time was wasted and work became complicated.

The purpose of the present invention is to provide a method for preventing the adhesion of a coating base that does not generate small particles on the inner wall of a coating pan or a baffle plate, in order to produce sugar-coated products that do not generate protrusions and do not impair the appearance or quality. Furthermore, it is an object of the present invention to provide a coating apparatus that prevents a coating base from adhering to a coating pan.

[Means for Solving the Problem] In order to achieve the above object, in the method for preventing adhesion of a coating base in a coating pan of the present invention,
During sugar coating in the coating pan, the temperature of the part of the coating pan where the coating base adheres and grows is controlled.

The coating pan portions to which the coating base adheres and grows are the inner walls and baffle plates of the coating pan, and cooling is effective for temperature control.

In addition, as a coating device, a rotatable coating pan equipped with a baffle plate is suitable, and the inner wall of this coating pan is configured to be able to adjust the temperature, and the baffle plate is configured to be able to cool it. has been done.

[Function] According to the method for preventing the adhesion of a coating base in a coating pan configured as described above, when a tablet or the like to be a product is placed in a coating pan and coated with sugar coating, the coating base adheres and grows. By controlling the temperature of the pan part, such as the inner wall of the pan or the baffle plate, especially by cooling, the temperature-adjusted part, such as the inner wall of the pan or the baffle plate as a whole, becomes deliquescent and the coating base no longer adheres to it. .

Furthermore, since the coating apparatus is configured to be able to adjust the temperature of the baffle plate and the inner wall of the coating pan, it is possible to adjust the temperature to the environment where the apparatus is installed. Furthermore, by heating the inner wall of the coating pan, it is possible to increase the temperature of the tablets, assist in the evaporation of water in the sugar coating layer, prevent changes in the color tone of the tablets, and shorten the coating cycle. Moreover, since it is possible to prevent the coating base from adhering to and growing on the inner wall of the coating pan and the baffle plate, cleaning of the inner wall of the coating pan and the baffle plate can be omitted or reduced.

[Example] An example of the present invention will be described below based on the drawings. Note that the members, arrangement, etc. described below do not limit the present invention, and can be variously modified within the scope of the spirit of the present invention.

1A and 1B show a coating apparatus 1 according to the apparatus invention of the present application used in the method invention of the present application, and the coating apparatus 1 of this example is a rotating coating pan installed obliquely on a base 2. 1O, a baffle plate 11 disposed in the rotating coating pan 1O, a coating liquid injection device 12, a blower device 13 for injecting dry air into the coating pan 10, and a coating pan 1.
0 and a temperature adjustment device 15 for adjusting the temperature of the baffle plate 11. Incidentally, if necessary, an exhaust device 14 for discharging the injected air from the coating pan IO can also be provided.

The rotary coating pan IO of this example is of an onion type, and has an input port 10a for introducing the product to be coated on the front side, and a rotating shaft 3 provided on the base 2 on the rear side.
It is attached to the base 2 and is supported so that the rotation speed can be adjusted by a rotation speed regulator 4 provided on the base 2. The rotating shaft 3 is provided with a shaft sealing device 5 such as a rotary joint rotatably supported at the base end of the cooling pipe 11a communicating with the baffle plate 11. The coating pan 10 is provided with an outlet lea of an air conditioner 16 that blows temperature-controlled air toward the outer wall fob.

The air conditioner 16 is controlled by a temperature control device fi15, which detects the temperature of the baffle plate 11 and the inner wall of the coating pan.
The temperature of the cold water flowing through the cooling pipe 11a and the temperature of the air blown out from the air conditioner 16 are adjusted and controlled based on information from the cooling pipe 11a (not shown).

The baffle plate 11 of this example is the coating pan 10
It is arranged so that it can be twisted in the rotational direction R at two places inside. Inside the baffle plate 11 is the cooling pipe 11a.
The baffle plate 11 is cooled by piping.

The blower device 13 is used to dry the sugar-coated tablets by removing moisture contained in the coating material after pouring the coating into the pan 10, and blows the temperature at a certain temperature depending on the coating conditions. It consists of a temperature/air volume adjustment device 13a and a blow pipe 13b so that air can be sent.
The end of b is placed in the coating pan 10.

The exhaust device 14 is used to expel moist air and the like from the coating pan 10 during the drying operation.

In this example, a spray gun is used as the coating base injection device 12, and this spray gun is connected to the coating base supply device 12b via a tube 12a.

By the device 1 having the above configuration, the baffle plate 1
1, or both the wall of the coating pan 10 and the baffle plate 11, or the temperature control device 15 appropriately controls the temperature depending on the installation environment of the device.

FIGS. 2 to 4 show second to fourth embodiments. In these embodiments, including the embodiment shown in FIG. 1, the same members and the like are denoted by the same reference numerals and their explanations will be omitted.

FIG. 2 shows another example of temperature control of the inner wall of the coating pan 10. In this example, the temperature is controlled by directly sprinkling water at a predetermined temperature on the outer wall fob of the coating pan 10. Watering is performed by detecting the temperature of the baffle plate 11 and the inner wall of the coating pan by a well-known detection means (not shown), and then controlling the water temperature regulating device 22 based on a command from the temperature regulating device 15 that compares this detected information.
This is done by introducing water heated (or cooled) through a tube 23a into a water sprinkler 23 disposed on the outer wall 10b of the coating pan. Further, in this example, one baffle plate is formed. The rest is the same as the embodiment shown in FIG. 1 above.

FIG. 3 is a schematic cross-sectional view showing the temperature control mechanism of the baffle plate 11 and coating pan 30 in an example in which another type of coating pan is used.
In addition to changing the shape of 1, the outer wall 3 of the coating pan 30
A one-section temperature tube 31 is disposed as a jacket at 0b, and this temperature control tube 31 is connected to the temperature control device 15. Cold water or hot water flows through the temperature control pipe 31.

The temperature of water as a temperature regulating medium circulating through the baffle plate 11 and the temperature regulating tube 31 of the coating pan is adjusted by heat exchange with the temperature regulating device 15, respectively. At this time, the water temperature adjustment device 22 is activated so that the temperature inside the temperature adjustment tube 31 can be further increased. Furthermore, without using water, the fins used in the heat exchanger can be brought into contact with the outer wall and connected to an air conditioner or the like. Even with the configuration as in this example, the same effects as in FIG. 1 can be achieved.

FIG. 4 shows another example, and the coating apparatus of this example has a duct chamber 41 that also serves as exhaust air formed at a predetermined location on the outer periphery of a rotatable coating pan 40, and an annular duct chamber 41 is formed on both sides of the coating pan 40. A cover chamber 42 is formed, and the temperature is adjusted from the outer wall of the coating pan to the inner wall of the coating pan by supplying air or water at a predetermined temperature to the cover chamber 42. code 42
A is a tube through which a medium for cooling or heating is conducted, and numeral 43a is a tube through which a medium for cooling the buckle plate 43 is conducted. Further, in this example, a desired number of baffle plates 43 are provided as shown in the figure. Although the duct chamber 41 is fixed in this example, it is constructed integrally with the coating pan 40 and
It is also possible to configure it so that it can rotate together with 0.

When the method of the present invention is carried out using each of the above-mentioned apparatuses, during sugar coating, the part of the inner wall of the bread where the coating base grows (the inner wall of the bread or the baffle plate in the bread) is cooled, etc. to maintain the temperature. By making the adjustment, the entire cooling part is deliquesced and no base material adheres to it.

The invention will now be explained by way of example in order to make it clearer.

[Example] Using the coating apparatus shown in FIG. 2, coating was performed by controlling the temperature of the outer wall of the coating pan and cooling the baffle plate under the following conditions.

The sample was uncoated tablets weighing 86 kg (one tablet weighing 145 mg).

590,000 tablets), an orange-yellow coating liquid was used, and each tablet was coated with 115 IIg.

For controlling the temperature of the coating pan wall and cooling the buckle plate, the water temperature during cooling was 206C.

The water temperature during heating was 60°C.

As a result of the above, the quality is equivalent to regular products, and the incidence of tablets with small particles (hereinafter referred to as wart tablets) is 0.068.
%, the change in tablet color could be prevented. Furthermore, the coating cycle could be performed in 13 minutes. This is a significant reduction over the 20 minute coating cycle required to maintain the tablet temperature at the required temperature with pan wall cooling alone.

In this way, the effect of cooling the buckle plate completely eliminated the generation of wart particles caused by the baffle plate. In addition, increasing the temperature of the coating pan wall by temperature control increases the tablet temperature that has decreased due to coating pan wall cooling, helps evaporation of moisture in the sugar coating layer, and prevents changes in tablet color, unlike when coating pan wall is only cooled. At the same time, it became possible to shorten the coating cycle.

Next, the results of testing the quality characteristics of the sugar coating described above will be shown.

(1) Visual Inspection Results Table 1 shows the results of visual inspection of 40,000 sugar-coated tablets randomly selected from among 590,000 sugar-coated tablets.

Table 1 As shown above, there were a total of 27 tablets with warts, and the ratio to the selected tablets was 0.0675%.

The above wart tablet incidence rate is based on pan cleaning (pan cleaning 3 to 5 times/1 ot) to prevent wart defects during production using onion type rotary coating equipment.
The incidence of warts is at the same level as when the treatment is performed. Therefore, by using the present method and apparatus, cleaning can be omitted or reduced.

(2) Results of color tone investigation As a result of maintaining the tablet temperature and sufficient moisture transfer in the sugar coating layer, a product with the same color tone as the regular product (comparison amount) was obtained. The results are shown in Table 2.

Table 2 Measurement results using a color difference meter The measurement was performed using a colorimeter made by Tokyo Juishiki Co., Ltd.

[Effects of the Invention] Since the present invention is configured as described above, it produces the effects described below.

By controlling the temperature of the pan walls and baffle plates, the base of the coating solution is prevented from adhering to and growing on the pan walls and baffle plates. Therefore, it is possible to prevent the generation of small particles caused by adhesion of the base, and it is also possible to prevent the formation of protrusion tablets caused by these small particles adhering to the product.

Furthermore, since the coating apparatus is configured such that the baffle plate and the inner wall of the coating pan can be temperature-controlled, the coating apparatus can be adapted to the environmental temperature at the location where the apparatus is installed.

Furthermore, by heating the inner wall of the coating pan,
It is possible to increase the temperature of the tablet, help the evaporation of water in the sugar coating layer, prevent changes in the color tone of the tablet, and shorten the coating cycle.

Furthermore, since it is possible to prevent the coating liquid base from adhering to and growing on the inner wall of the coating pan and the buckle plate, cleaning of the inner wall of the coating pan and the baffle plate can be omitted or reduced.

[Brief explanation of the drawing]

FIG. 1A is a schematic cross-sectional view of a coating apparatus showing a first embodiment of the present invention, FIG. 1B is a schematic diagram of a coating pan viewed from arrow X in FIG. 1A, and FIGS. The figure is a schematic cross-sectional view of a coating apparatus showing second to fourth embodiments. 1...Coating device. 10.30.40...Coating pan, 11.43
...baffle plate. 15... Means for temperature adjustment, means for cooling (temperature control device), 22... Means having temperature control (water temperature control device). Patent applicant: Yamanouchi Pharmaceutical Co., Ltd. Representative patent attorney: Kiyoshi Fujino Small interview: Shozo Nagai Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A coating pan that controls the temperature of a part of the coating pan where a coating base adheres and grows during sugar coating in a rotating coating pan to prevent the coating base from growing. Method for preventing coating base adhesion. 2. A rotatable coating pan equipped with a baffle plate, the coating pan having a means for adjusting the temperature of its inner wall and a means for cooling the baffle plate.