JPH029475A - Coating and drying device for inner surface of cup-shaped container - Google Patents

Abstract

PURPOSE:To form a resin coat at a speed corresponding to a production pace by placing rotary cups where cup-shaped containers for instant noodle are set and held in parallel and in a circle on the periphery of a rotor and sending the containers into a drying furnace after the injection of a coating agent on the inner surface of the containers while these containers are set and held in the rotary cups which rotate at high speed. CONSTITUTION:A number of rotary cups 2 in which cup-shaped containers 1 are set and held are placed in parallel and in a circle on the periphery of a rotor 5 which rotates vertically in a semi-circular drying furnace 4. In front of the drying furnace 4, a rotary drive device 24 which rotates a wheel 8, at high speed, installed on the rotating shaft 3 of each rotary cup 2 and a coating device 25 which ejects a coating agent to the inner surface of the container 1 are installed. Under this design, the container 1 is set in the rotary cup, and the wheel 8 which comes in contact with the rotary drive device 24 at a coating position, and the rotary cup 2 rotate at high speed. At the same time, the whole surface of the container is coated instantaneously. After this, the rotary cups 2 pass through the drying furnace 4 slowly and the containers 1 are automatically removed at a specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inner surface coating drying device for applying a coating agent to the inner surface of a cup-shaped container and drying the applied coating agent.

[Conventional technology]

For example, the Styrofoam cup-shaped container used to store instant noodles has a slight air permeability, so even if it is sealed, the quality of the dry noodles that are fried in vegetable oil will deteriorate due to oxidation and the moisture absorption of the ingredients. It was not possible to maintain the shelf life of instant noodles for a long time.

For this reason, the inner surface of cup-shaped containers containing instant noodles destined for overseas shipments, which take long periods of time to be transported by sea, are coated with a resin film to extend their shelf life longer than those for domestic consumption.

In addition, instant noodles stored in cup-shaped containers whose inner surfaces are coated with a resin film not only have a long shelf life;
The taste immediately after production is maintained for a long period of time, and the quality of the product is significantly improved.

(Problems to be Solved by the Invention) However, since instant noodles are extremely inexpensive, simply coating the inner surface of the container with a resin film will have an impact on the product price.

Moreover, the cost of instant noodle containers is being reduced through mass production, but coating equipment that applies resin liquid to the inner surfaces of the cup-shaped containers that are produced one after another at a speed that corresponds to the production tact, and the applied resin In the current situation where there is no drying equipment that can dry the liquid quickly and smoothly, the process of coating the inner surface of the container with the resin liquid takes time and reduces productivity, which not only increases the cost of the container. , which will directly impact the product price of instant noodles, making them extremely expensive.

Therefore, even though it is known that it is desirable to coat the inner surface of a cup-shaped container for storing instant noodles with a resin film, it is not possible to use the container for instant noodles for the domestic market, where price competition is fierce, and the production volume is limited. It is used only for instant noodles sold overseas, where there are few products.

Therefore, the technical problem of the present invention is to quickly apply a coating agent such as a resin liquid to the inner surface of a cup-shaped container, and at the same time quickly send the cup-shaped container coated with the coating agent into a drying oven without any delay. The object of the present invention is to solve this problem and make it possible to coat the inner surface of a cup-shaped container with a resin film or the like without reducing productivity.

[Means for solving problems]

In order to achieve this object, the apparatus for coating and drying the inner surface of a cup-shaped container according to the present invention has a plurality of rotary cups that fit and hold the cup-shaped container with its opening facing outward. The rotor is arranged in parallel with the central axis of the rotor, which is rotated so as to pass through the rotor, and is arranged in an annular shape along the periphery of the rotor. A rotary drive device that contacts a wheel attached to the rotating shaft of each rotating cup to rotate the wheel at high speed before the cup is sent into the drying oven as the rotor rotates; The present invention is characterized in that it is provided with a coating machine that sprays a coating agent toward the inner surface of a cup-shaped container that is inserted and held in a rotating cup that is rotated at high speed.

[Effect]

According to the present invention, a rotating cup into which a cup-shaped container is inserted and held is rotated at high speed by a rotational drive device that contacts wheels attached to a rotating shaft of the rotating cup, and the cup rotates at high speed integrally with the rotating cup. A coating agent is sprayed toward the inner surface of the mold container.

As a result, the sprayed coating agent is instantaneously and uniformly applied over the entire inner surface of the cup-shaped container.

Further, the cup-shaped container whose inner surface has been coated is smoothly and promptly fed into the drying oven while being inserted and held in the rotary cup as the rotor rotates.

Therefore, the inner surface of the cup-shaped container can be coated with a resin film or the like without reducing the productivity of the cup-shaped container.

〔Example〕

Embodiments of the present invention will be specifically described below based on the drawings.

Fig. 1 is a front view showing an example of an inner surface coating/drying device according to the present invention, Fig. 2 is a sectional view taken along the line A-A, and Figs. 3 and 4 are front and plan views showing an enlarged coating machine. It is.

In the inner surface coating drying apparatus shown in this example, rotating cups 2, 2, etc., into which a cup-shaped container 1 made of expanded polystyrene is inserted and held, each rotate their rotating shafts 3 in a vertical direction so as to pass through a drying oven 4. The rotor 5 is arranged parallel to the central axis 6 of the rotor 5, which is rotated by the rotor 5, and arranged in an annular shape along the periphery of the rotor 5.

Further, the rotating shaft 3 of each rotating cup 2 is provided with a wheel 8 that rotates in sliding contact with an annular guide rail 7 arranged concentrically with the rotor 5, and a wheel 8 that rotates through the rotating shaft from the rear end to the tip. A ventilation hole 9 opening into the cup 2 is formed.

The rotor 5 has a drying oven 4 whose upper half is formed in a semicircular shape.
A chain 14 is hung in parallel between a sprocket 10 attached to the rear end of the central shaft 6 housed in the drying oven 4 and protruding outside the drying oven 4, and a sprocket 13 attached to the rotating shaft 12 of the motor 11. It is designed to be rotationally driven.

The drying oven 4 is formed with an inlet 15 and an outlet 16 for the rotary cup 2 that is fed in with the rotation of the rotor 5.
Air supply ports 19R, 19L and an exhaust port 20 are formed for the hot air supplied from the hot air generator 17 by the circulation fan 18, and the hot air introduced from the air supply ports 19R, 19L is fed into the rotary cup 2. Hot air outlets 21, 21, etc. that inject hot air toward the opening of the cup-shaped container 1 inserted and held therein.
is formed.

In addition, air is supplied to the lower half of the rotor 5 from within a ventilation hole 9 formed in the rotating shaft 3 of the rotating cup 2 that has arrived at the supply position X of the cup-shaped container l by slidingly contacting the rear end of the rotating shaft 3. a pressure reducing pipe 22 that sucks air, and a pressure reducing pipe 22 that slides into contact with the rear end of the rotating shaft 3 of the rotating cup 2 that has passed through the drying oven 4 and reached the discharge position Y of the cup-shaped container 1 and blows air into the vent hole 9. pressure pipe 23
and a rotational drive that contacts a wheel 8 attached to the rotating shaft 3 and rotates the wheel 8 at high speed before the rotating cup 2 that has passed through the supply position 1x of the cup-shaped container 1 is sent into the drying oven 4. A coating agent such as a resin liquid is applied toward the inner surface of the cup-shaped container 1 that is inserted and held in the rotating cup 2 that is integrally rotated at high speed with the rotation of the device 24 and the wheel 8 and has arrived at the coating position Z. A coating machine 25 for spraying is provided.

Note that the rotational drive device 24 has a configuration in which a part of the guide rail 7 is cut out by a certain length, and a rotating body is inserted in the cutout.

In addition, the applicator 25 has a total of three airless spray guns 26a, 26b, and 26C, including two spares, arranged radially at intervals of 120 degrees around a rotating shaft 27 that rotates equiangularly. By rotating 27, the spray gun can be advanced to the coating position Z in place of another spray gun that has become clogged with coating material.

Note that the rotating shaft 27 to which the spray guns 26a to 26c are attached also serves as a paint supply pipe that supplies paint to each of the spray guns 26a to 26c.

Further, 28 is a stopper that fixes the spray gun advanced to the coating position Z.

As the rotor 5 rotates, the rotary cup 2 arrives at the supply position X of the cup-shaped container 1, and the pressure reducing pipe 22 slides into airtight contact with the rear end of the ventilation hole 9 formed in the rotary shaft 3. Air is sucked from inside. At this time, when the bottom side of the cup-shaped container 1 is brought close to the opening of the rotating cup 2, the cup-shaped container 1 is automatically sucked into the rotating cup 2 and inserted with the opening facing outward. Retained.

Next, the rotating cup 2 that has inserted and held the cup-shaped container 1 in this way is moved to the coating position Z, and the wheel 8 attached to the rotating shaft 3 contacts the rotational drive device 24, and the wheel 8 is moved to the application position Z. The coating machine 25 sprays a coating agent toward the inner surface of the cup-shaped container 1 which is inserted and held in the rotating cup 2 at high speed, and the coating agent is sprayed onto the inside of the cup-shaped container 1. Instantly and evenly applied over the entire inner surface.

That is, if the cup-shaped container 1 is rotated at high speed, uniform coating can be achieved by spraying a small amount of the coating agent for about 0.2 seconds.

In addition, when spraying a small amount of coating agent in short periods of time, the spray guns 26a to 2 of the coating machine 25 are used.
The nozzle 6c is likely to become clogged, but since another spray gun can take the place of the clogged spray gun at any time and advance to the coating position Z, the coating material can be coated without causing poor coating due to a clogged spray gun nozzle. It becomes possible to shorten the injection time to less than the production tact time for cup-shaped containers (2).

Next, the rotary cup 2 that has passed through the coating position Z is transferred to a drying oven 4.
The drying oven 4 is fed through the inlet 15 of the drying oven 4, and the wheels 8 attached to the rotating shaft 3 slide on the guide rails 7 and pass through the drying oven 4 while rotating slowly.

At this time, the cup-shaped container 1 rotates together with the rotating cup 2.
Hot air is blown inward from the hot air outlets 21, 21, etc., and the coating agent applied to the inner surface of the cup-shaped container 1 is efficiently dried in a short time.

When the drying of the cup-shaped container 1 is completed, the rotary cup 2 is sent out from the outlet 16 of the drying oven 4, reaches the discharge position Y of the cup-shaped container 1, and is formed on the rotation shaft 3 of the rotary cup 2. A pressurizing pipe 23 is brought into airtight sliding contact with the rear end of the ventilation hole 9, and compressed air is blown into the rotary power pump 2.

As a result, the cup-shaped container I that has been fitted and held within the rotary cup 2 is automatically taken out of the rotary cup 2.

Then, the rotary cup 2 from which the cup-shaped container 1 has been taken out comes to the supply position X again, inserts and holds the cup-shaped container 1, and thereafter repeats the above-described operation.

Therefore, according to the present invention, the coating agent can be applied to the inner surfaces of cup-shaped containers 1 that are produced one after another in a short time, and at the same time, the cup-shaped containers l coated with the coating agent can be placed in the drying oven 4 without any problems. can be sent to.

Further, since the rotation drive device 24 for rotating the rotary cup 2.2- at high speed does not need to be provided for each rotary cup 2, the equipment cost can be reduced, and at the same time, it can be separated from each rotary cup 2 and installed outside the drying oven 4. Because it is installed, there is no need to worry about it breaking down due to high heat.

Incidentally, if the rotor 5 is rotated vertically as in the embodiment, the installation space of the entire coating/drying apparatus is reduced, and at the same time, hot air leakage from the inside of the drying oven 4 housing the rotor 5 is reduced. Thermal efficiency is greatly improved.

〔Effect of the invention〕

As described above, according to the present invention, the rotating cups that are arranged in an annular manner along the circumference of the rotor and move while drawing an annular trajectory as the rotor rotates are attached to the rotating shaft. The coating material is sprayed toward the inner surface of the cup-shaped container, which is rotated at high speed by a rotary drive device in contact with the wheels, and which is fitted and held in the rotating cup and rotates integrally at high speed. The agent is instantly and uniformly applied over the entire inner surface of the cup-shaped container.

In addition, since the cup-shaped container with the coating agent applied to its inner surface is inserted into the rotary cup and sent into the drying oven as it is, it can be adjusted to suit the production tact of mass-produced cup-shaped containers one after another. It has the very valuable effect of being able to coat the inner surface with a resin film or the like.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of an inner surface coating/drying device according to the present invention, Fig. 2 is a sectional view taken along the line A-A, and Figs. 3 and 4 are front and plan views showing an enlarged coating machine. It is. No.) K Explanation of symbols 1...-Cup-shaped container, 2--Rotating cup, 3--Rotating shaft of rotating cup, 4--Drying oven, 5--Rotor, 6
- Center shaft of rotor, 8... Wheel, 24 - Rotation drive device, 25 - Coating machine. Patent applicant Trinity Industries Co., Ltd.

Claims (1)

[Claims] A large number of rotating cups, which fit and hold cup-shaped containers with their openings facing outward, have their rotational axes parallel to the central axis of a rotor that is rotated to pass through the drying oven. Wheels are arranged in a ring along the circumference of the rotor, and wheels are attached to each of the rotating shafts, and wheels are attached to each of the rotating shafts, and wheels are attached to each of the rotating cups before the rotating cups are sent into the drying oven as the rotor rotates. a rotational drive device that contacts a wheel attached to a rotating shaft and rotates the wheel at high speed;
An inner surface of a cup-shaped container, characterized in that it is equipped with a coating machine that sprays a coating agent toward the inner surface of a cup-shaped container that is inserted and held in a rotating cup that rotates at high speed as the wheel rotates. Coating drying equipment.