JP2003173906A - Device and method for drying resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method for drying resin by which working hour can be shortened and, in addition, the mottling of a resin film can be prevented at the time of applying a liquid resin to an insulating substrate and drying the resin. <P>SOLUTION: After many insulating substrates 3 are housed in a bag-like housing body 7 having stitches and the liquid resin is adhered to the substrates 30, the resin is dried by blowing drying air upon the substrates 30 housed in the housing body 7, while both ends of a rocking arm 4 are alternately rocked upward and downward in a state where both side sections of the housing body 7 are hung down from both ends of the arm 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin protective film forming process for protecting a resistance film of a ceramic insulator, for example, in a process of manufacturing a resistor with a lead wire, and more particularly to an insulating base material such as a ceramic insulator. The present invention relates to an apparatus and a method for drying a liquid resin applied on top.

[0002]

2. Description of the Related Art In a resistor with a lead wire, a ceramic insulator is coated with a resistance film, and in order to form a protection film for the resistance film, a liquid resin is applied and dried. A film-forming insulator is produced by performing the steps. Conventionally,
In the process of applying liquid resin and drying it, put the ceramic insulator coated with the resistance film in the cage of the wire mesh,
Dip the ceramic insulator together with the basket into a container containing the protective film material (liquid resin), and then pull up the basket. Then, in a state where the liquid resin was adhered on the resistance film of the ceramic insulator, hot air was sent to the basket to dry it.

However, these conventional methods have the following problems. First, there is a problem in that extra resin remains on the ceramic insulator, causing uneven coating. Also, there is a problem that the resin-coated ceramic insulator sticks like a dumpling in the basket. Further, there is a problem that a long drying time is required.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and shortens the working time for applying and drying a liquid resin on an insulating base material,
Another object of the present invention is to provide a resin drying apparatus and method capable of preventing uneven coating of the resin film.

[0005]

SUMMARY OF THE INVENTION A resin drying apparatus according to the present invention is an apparatus for drying a liquid resin applied to an insulating base material, and is capable of containing a large number of the base materials. And a container swinging means for suspending both sides of the container containing a large number of the bases and swinging the container, and drying air is stored in the container. A supply means for spraying a large number of said base materials,
The container swinging means performs drying by the air supply means while alternately moving up and down both sides of the container.

Further, in the method for drying a resin of the present invention, a large number of insulating base materials are contained in a container having a mesh, and after the liquid resin is adhered to the base material, both sides of the container are accommodated. In a state in which the portion is suspended at both ends of the swing arm, the swing arm is alternately moved up and down to swing, and a large number of the bases accommodated in the bag-shaped storage body for drying air. It is characterized in that the material is sprayed and dried.

According to the present invention described above, while the liquid resin is adhered to the base material (ceramic insulator), both sides of the container are alternately moved up and down and rocked, while air for drying is used. By spraying and drying the base material, the base material is sufficiently stirred inside the container, and is dried while moving. This makes it possible to prevent the base materials from adhering to each other and to prevent the base materials from adhering to the inner wall of the container, and it is possible to uniformly form the resin protective film on the base material surface. Further, since the drying can be performed efficiently, the working time can be shortened. In addition, excess resin drops from the mesh of the bag-shaped container and is returned to the lower resin container, so that uneven coating can be prevented and the amount of resin used can be saved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of the apparatus according to the embodiment of the present invention (door open state), and FIG. 2 is a side view of the apparatus (partial sectional view). As shown in these figures, the present apparatus includes a net-shaped bag-like container 7 that can accommodate a large number of resistive substrates (ceramic insulators with a resistive film formed thereon), and It is composed of a swing arm 4, a fan 2 as a means for supplying drying air, a resin container 8, and a housing 13 including a controller 3 and the like. Here, the container 7 is a bag made of a net made of a plastic material such as polyethylene or polyester. Since the net-shaped bag-shaped container 7 has flexibility, it is suitable for uniformly agitating the base materials contained therein without rubbing the base materials contained therein more than necessary and evenly rubbing the base materials.
Both sides of the bag-shaped container (net) 7 are hung from both ends of the swing arm 4 by S-shaped hooks 6, respectively. In the state shown in the figure, a large number of resistance base materials (ceramic insulators with a resistance film formed) 30 are housed, immersed in a resin solution, and a liquid resin is attached to the surface of the base material. The drying stage is shown.

The container swinging means comprises one motor 11 and
It is composed of a crank mechanism that converts the rotational force of the motor into a linear motion and transmits the linear motion, a swing arm 4, and the like. The crank mechanism includes a motor-side arm 21, a transmission arm 22,
23, etc., the rotational force of the motor 11 is applied to the arm 2
1, 22 and 23 transmit it to the swing arm 4 as a linear motion, and the swing arm 4 alternately moves up and down (swings) about a fulcrum 5 supported by a rotary shaft 24. The bag-shaped container (net) 7 has swing arms 4 on both sides thereof.
Since both ends of the swing arm 4 are suspended, the swing arm 4 swings as the both ends move up and down.

The drying air supply mechanism comprises an exhaust duct 1, a fan 2 and an intake duct 9. Drying air supplied from a drying air generator (not shown) is introduced into the casing 13 of the apparatus through the intake duct 9. Note that the intake duct 9 and the drying air generator may not be used. In this case, the housing 13 may be provided with an air inlet so that the air in the room in which the device of the present invention is installed is taken in as drying air. The fan 2 is arranged in the upper part of the housing 13, and the intake duct 9 (or the air intake port) is arranged in the lower part of the housing 13 because the drying air flows from the bottom to the top and the bag-shaped accommodation is performed. This is so that many ceramic insulators in the body (net) 7 are evenly hit from below. The drying air is dried outside the apparatus through the exhaust duct 1 after drying the liquid resin film attached to the surfaces of the many ceramic insulators in the container 7.
The controller 3 centrally manages the operation of the device and determines the air volume of the exhaust gas by controlling the rotation speed of the fan, for example. Further, the number of vibrations of the swing arm, the operating time of the drying device, the temperature of the drying air, etc. can be set arbitrarily.

FIG. 3 shows the swinging of the swinging arm and the inside of the housing.
It shows the movement of a lot of ceramic insulators. Figure 3
(A) is when the swing arm 4 is horizontal, and a large number of ceramic insulators 30 are distributed substantially horizontally inside the bag-shaped container 7. (B) is when the swing arm 4 is rotated counterclockwise, and a large number of ceramic insulators 30 are distributed in a slanted manner inside the bag-shaped container 7 and are in a stirred state. (C) is the time when the swing arm 4 is rotated in the clockwise direction, and a large number of ceramic insulators 30 are distributed in the bag-shaped container 7 while being inclined in the opposite direction and similarly stirred. Has become.

As described above, the swing arm 4 vertically moves (swings) about the fulcrum 5, so that a large number of inside of the bag-shaped container 7 suspended at both ends of the swing arm 4. The ceramic insulator 30 of is agitated inside the container (bag),
They are hitting each other and rubbing against each other.
Then, while the drying air is supplied, the ceramic insulators collide with each other and rub against each other,
The resin uniformly adheres to the surface of each insulator and is dried. The excess resin falls from the mesh of the container (net) 7 and is stored in the resin container 8.

FIG. 4 shows an embodiment of the swing angle adjusting mechanism. The above-described swing of the swing arm 4 is performed by one motor 11
This is done by converting the rotational force of to a linear motion. Angle adjusting holes 25, 2 are formed in the transmitting arm 22 of the rotational force transmitting mechanism.
6, 27, 28 are provided. The illustrated example is a state in which the angle adjusting hole 26 is used. If the use of the angle adjusting hole 26 is changed and the angle adjusting holes 25, 27, 28 are used, the swing angle can be adjusted according to the work purpose.

Next, the method for drying the resin of the present invention will be described. First, a large number of, for example, one lot, of ceramic insulators coated with a resistance coating are housed in a bag-shaped housing 7 made of a net made of a plastic material. Then, the bag-shaped container 7 is immersed in the resin liquid, and the liquid resin is attached to the surface of the ceramic insulator. Then, using the S-shaped hooks 6, both sides of the container 7 are hung on both ends of the swing arm 4. Then, the motor 11 is rotated, and the swing arm 4 is swung by the crank mechanisms 21, 22, 23. As a result, as shown in FIG. 3 described above, a large number of ceramic insulators inside the container (bag) 7 are agitated and come into a state of colliding with each other and rubbing against each other. During this period, excess resin falls from the mesh of the container (bag) 7 and is stored in the resin container 8 provided below. Then, by supplying the drying air by the operation of the fan 2 while swinging the container (bag) 7, the drying of the liquid resin adhering to the ceramic insulator proceeds. Then, by supplying drying air at a predetermined temperature for a predetermined time, a good quality resin protective film is formed on the surface of the ceramic insulator.

In the process of forming a resistance film on the ceramic insulator and drying the liquid resin adhered to the surface thereof, the container (net) 7 vibrates about 40 to 60 times per minute, and the swing angle is 30 °. A good quality resin film was obtained by carrying out at about 90 °. However, the swing angle, the number of vibrations, the drying time, the temperature, etc. can be arbitrarily set according to the characteristics of the object to be dried.

It should be noted that the above embodiment describes one mode of the embodiment of the present invention, and it is needless to say that various modified embodiments are possible without departing from the gist of the present invention. That is, the above-described embodiment describes the application example of the step of forming the resistance film on the ceramic insulator and drying the liquid resin adhered to the surface of the ceramic insulator. Of course, the gist can be similarly applied. Further, as described above, the container is preferably a bag made of a plastic net, but a basket-shaped container made of metal or plastic may be used.

[0018]

According to the present invention described above, a large number of ceramic insulators to which a liquid resin is attached are put in a bag-shaped container (net), and both side portions thereof are vertically moved (swinged) alternately. A sufficient stirring effect can be obtained. Therefore, the insulators are not attached to each other and the insulators are not attached to the inner wall of the container, so that a uniform resin protective film can be formed on the insulator surface. Furthermore, since the excess resin falls from the mesh of the container (net) and is returned to the resin container, there is no waste of resin and the manufacturing cost is reduced.

[Brief description of drawings]

FIG. 1 is a front view (door open state) showing a drying device according to an embodiment of the present invention.

FIG. 2 is a side view (partial cross-sectional view) of the drying device shown in FIG.

FIG. 3 is a diagram showing a swinging state of a container (bag),
(A) shows a state where the swing arm is horizontal, (b) shows a state where the swing arm rotates counterclockwise, and (c) shows a state where the swing arm rotates clockwise. There is.

FIG. 4 is a diagram illustrating a swing angle adjusting mechanism.

[Explanation of symbols]

1 exhaust duct 2 fans 3 controller 4 swing arm 5 Support point of swing arm 6 S-shaped hook 7 container (bag) 8 resin containers 9 Air intake duct 11 motor 12 Motor rotation axis 13 housing 14 doors 21 Motor side arm 22,23 Transmission arm 24 rotation axis 25, 26, 27, 28 Angle adjustment holes 30 lots of insulator processed

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F26B 25/06 F26B 25/06 ZF term (reference) 3L113 AA06 AA10 AB02 AC48 AC49 AC63 AC67 BA34 DA10 5E032 BA03 BB01 DA02

Claims (5)

[Claims] 1. An apparatus for drying a liquid resin applied to an insulating base material, comprising: a mesh-containing container capable of containing a large number of the base materials; and a large number of the base materials. A container swinging means for suspending both sides of the container, and swinging the container, and a supply means for blowing drying air to the large number of base materials contained in the container. The resin drying apparatus is characterized in that the container swinging means performs drying by the air supply means while alternately moving up and down both sides of the container. 2. The resin drying apparatus according to claim 1, wherein the container is a bag-shaped container made of a net made of a plastic material. 3. The resin drying apparatus according to claim 1, further comprising a container for storing the dropped liquid resin below the mounting position of the container. 4. The resin drying apparatus according to claim 1, further comprising a mechanism for adjusting an angle at which the container is swung. 5. A plurality of insulating base materials are accommodated in a container having a mesh, and after a liquid resin is attached to the base material, both sides of the container are suspended at both ends of a swing arm. In the lowered state, the both ends of the swing arm are alternately moved up and down to swing, and drying air is blown onto a large number of the base materials contained in the bag-shaped container to perform drying. Characteristic resin drying method.