JPH0459070A - Device for coating latticed substrate with adhesive - Google Patents

Abstract

PURPOSE:To uniformly coat a substrate with an adhesive and to prevent the contamination of the surroundings by providing a high-viscosity adhesive bath, a conveyor member, a member for successively and forcedly dipping the substrates in the bath and a member for blowing off the adhesive. CONSTITUTION:Two high-pressure air pipelines 162 are provided above a guide 156. Plural downward jet nozzles 164 are staggeringly furnished to each pipeline 162, and high-speed air is continuously blown against a substrate 12 passing the guide 156 from the nozzles. The substrates 12 are pulled by a pin conveyor 34, advanced on the surface of an adhesive bath and forcedly dipped in the bath in succession by a rotary bar 152. The dipping is carried out in the direction of the open lattice of the substrate 12 and practically in parallel, and hence a thick adhesive layer is rapidly formed over the whole surface of the substrate 12 without frothing. High-speed air is then blown against the substrate 12, and the excess adhesive filming the lattice of the substrate 12 is removed. A high-viscosity adhesive is used in this way.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to an adhesive coating device for a grid-like substrate, and more particularly to a deodorizing filter for near conditioners comprising a filter substrate and activated carbon particles adhered to the filter substrate. The present invention relates to an apparatus for applying an adhesive to the lattice-shaped substrate in the manufacturing system.

[Prior Art] In Japanese Patent Application No. 258,748, the applicant has proposed a filter consisting of a lattice-shaped filter base and gas adsorbent (mainly activated carbon) particles adhered to the filter base. . This filter has a thickness of about 15 mm on the base.
Hereinafter, the planar area of one cell of the lattice of the above substrate = approximately 0.20-
Approximately [], 335 cm2 Dimensions of the above gas adsorbent particles - approx.
It is characterized by satisfying the following conditions: 0 - about BO mesh, the amount of gas adsorbent particles used per unit area of the plane of the substrate - about 400 about 2000 g/m2, and the aperture ratio of the filter - about 50 - about 80%. .

In summary, this filter differs from conventional filters by the relatively large size of the activated carbon (gas adsorbent) particles and by the small thickness of the filter.

Therefore, special consideration, which is different from conventional products, is required regarding handling of the filter base, impregnation of activated carbon, etc. In particular, it is essential that the adhesive liquid used has a high viscosity (approximately 10 to 50 poise).

Adhesive coating devices for substrates used in conventional manufacturing systems for this kind of filters have a structure in which the adhesive is sprayed onto the substrate by spraying.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional spray-type coating device, even if the highly viscous adhesive targeted by the present invention is used, it is difficult to form a well-dispersed adhesive mist. The problem arises that it is difficult to apply the adhesive uniformly over the entire surface of the substrate. There is also the problem that spray-type coating devices contaminate the surrounding environment.

The present invention has been made based on this viewpoint, and an object of the present invention is to provide an adhesive coating device that can uniformly apply an adhesive over the entire surface of a substrate and does not contaminate the surrounding environment.

[Means for Solving the Problems] In order to achieve the above object, in the coating device of the present invention, a bath of a high viscosity adhesive and a stretched lattice-shaped filter substrate are advanced along the liquid surface of the bath. a pushing member that forcibly immerses the substrate in the adhesive bath in order;
The present invention is characterized by comprising a blowing member that blows air onto the substrate after immersion in order to remove excess adhesive.

In a preferred embodiment, the pushing member is a rotating bar, and the adhesive has an initial viscosity of about 10 to 50 poise,
The speed of the air is about 30 to 250 m/sec.

[Function] According to the device according to the present invention having the above configuration, the filter base is forcibly immersed in a bath of high viscosity adhesive by the pushing member (rotary bar). The above dipping is performed generally parallel to the opening direction of the lattice of the substrate, and a thick, highly viscous adhesive layer is formed over the entire substrate without forming bubbles.

After the adhesive is applied, the excess adhesive that forms a film on the grid of the base is removed by air from a blowing member.

[Example] Filter Structure and Materials FIG. 2 is a plan view showing an example of a deodorizing filter 0 processed by the apparatus according to the present invention. This filter consists of a grid-like filter base 12 and gas adsorbent particles 14 adhered to the filter base 12.

Deodorizing filter 0 has an aperture ratio (in a plane parallel to the paper plane of FIG. 2) of about 50 to about 80%, and this value is obtained as a result of complying with various conditions described below. Also, the thickness of filter 0 (in the direction perpendicular to the paper surface of Fig. 2) is 1
It is 5 nv or less, preferably about 3 nun or more.

This filter 0 has gas adsorbent particles 1 as shown in FIG.
It differs from conventional filters in that the dimensions of filter 4 are relatively large and the thickness of filter 0 is small. These characteristics are
As a deodorizing filter for near conditioners, it is the key to meeting the requirements of low pressure loss, appropriate deodorizing ability, and long life.

The base 12 is made of a thin material such as paper, aluminum, or plastic. When paper is used as a material, it can be impregnated with phenol resin or the like to strengthen the paper. Further, the base body 12 can also be subjected to a non-combustible treatment. The thickness of the base 12 is substantially the same as that of the present filter 10, so it is approximately 1
It is preferably 5n+m or less, preferably 3n+m or more. This thickness is determined because the present filter 0 is finally housed in the casing of the near conditioner.

In the illustrated example, the pattern shape of the lattice of the base body 12 is a hexagonal so-called honeycomb shape, but the pattern shape can be any shape such as a rectangle or a triangle. However, the planar area of one cell 16 of the grid (second
) is approximately 0.20-
It will be about 0.35 cm2. This value essentially means the density of the partition wall 18 for supporting the gas adsorbent particles 14.

The gas adsorbent particles 14 are made of activated carbon, but it is also possible to use a type of impregnated activated carbon or the like. Further, in order to deal with indoor CO generation sources such as oil stoves, a catalyst capable of catalytically oxidizing CO can be used in combination with a deodorizer. This catalyst is a gold/oxide catalyst that does not become inactive even in the presence of moisture (disclosed in JP-A-60-238148, etc.)
is desirable. The size of the gas adsorbent particles 14 is about 20 to about B.
Lomé Soche, the amount of gas adsorbent particles 14 used per planar unit area of the substrate 12 is about 400 to about 2 [100 g /
m2.

As the binder for adhering the gas adsorbent particles 14 to the substrate 12, an adhesive is preferably used to prevent the particles from falling off. Known adhesives such as acrylic, natural rubber, synthetic rubber, and silicone adhesives can be used, but in order to strongly adhere to the filter base so that the activated carbon does not fall off, it is necessary to use a highly concentrated adhesive. agent is used and the layer thickness is required to be thick to some extent. Therefore,
The adhesive fluid used has a high viscosity (approximately 10 to 50 poise) and the method of application must be such that a large layer thickness is obtained.

Overall view of manufacturing system FIG. 3 is a plan view showing an entire example of a manufacturing system for a near conditioner deodorizing filter incorporating the coating device according to the present invention.

An introduction part is formed at the entrance of the system for introducing the filter base in an unexpanded state, that is, the filter base in which the lattice is collapsed, into the system.

With this system, unexpanded material blocks can be introduced and processed as they are, making it possible to reduce the labor and costs involved in transporting and storing materials.

In the introduction section, there is a free roller conveyor (introduction machine) 22.2
3 are arranged, which successively introduce the substrate 12 in a direction parallel to the plane of the paper of FIG. A spreading machine 24 is installed in the middle of the conveyors 22, 23, which spreads the substrates, ie, opens the grid, by the action of moisture and heat. A pin conveyor 26 is disposed following the conveyor 23, and this conveys the substrate by hooking pins on a grid of the expanded substrate.

Following the conveyor 26, a dipping machine 28 is disposed for supplying a high viscosity adhesive to the stretched substrate. Soaking machine 28
The substrate 1 is coated with a high viscosity (approximately 10 to 50 poise) adhesive.
2 is forcibly immersed to form a thick adhesive layer over the entire area of the substrate. At this time, since the adhesive has a high viscosity, it is thought that a film is often applied within the grid.

Therefore, if the filter is allowed to dry as it is, it will cause an increase in pressure loss, a decrease in deodorizing performance, and a shortened service life of the finished filter. In order to avoid this, in this system, a blower 32 for removing excess adhesive with air is disposed after the dipping machine 28. Since the adhesive has a high viscosity, the air velocity hitting the adhesive is quite high (approximately 30 to 250 m/sec).
) is desirable.

A pin conveyor 34 similar to conveyor 26 is arranged after the blower 32, which transfers the substrate 12 to the pin conveyor of the next dryer 36. Since the configuration is as described above,
In the illustrated system, when using a new block of substrate material, the substrate material is manually introduced from the inlet side until the grid at the tip of the substrate catches the pins of the pin conveyor of the dryer 36.

The dryer 36 heats the substrate 2 to reduce the moisture content of the adhesive applied to the substrate to a predetermined amount.

This gives the adhesive a predetermined viscosity, and
The smell of solvent is blown away.

- In the membrane, the initial moisture content of the adhesive is around 70% by weight, which is reduced to less than 10% by weight, preferably around 3% by weight at the outlet of the dryer 36;

In addition, the thicker the adhesive coating layer, the more likely it is that foaming will occur during the drying process, so drying should be carried out at a moderate temperature (approximately 60 - 60℃).
100° C.) for a long period of time (about 10 to 30 minutes).

After drying, the substrate 12 is cut to size for the finished near conditioner filter. The substrate after the adhesive has dried has considerable strength, so it is possible to cut it accurately. Furthermore, cutting before impregnating activated carbon has the advantage of extending the life of the cutting blade. However, it is also possible to cut the substrate after impregnating the activated carbon.

More specifically, a first cutting machine 38 is installed at the top of the dryer 36, and this cuts the substrate 2 in a direction perpendicularly crossing the longitudinal axis direction from the conveyor 22 to the dryer 36. . Following this, a direction changing mechanism 44 is disposed, and the substrate 12 cut by the cutter 38 is transferred to a roller conveyor 4.
2 to a roller conveyor 46 in a conveying direction perpendicular to this. At the end of the conveyor 46, a second cutting machine 48 is installed.
is installed, which cuts the base body] 2 in a direction perpendicularly transverse to the longitudinal axis direction of the conveyor 46, and makes the base body have the above-mentioned predetermined dimensions.

Following the second cutting machine 48, an impregnating machine 54 is disposed to apply activated carbon to the substrate 12 of a predetermined size via the adhesive. The applicator 54 advances the base body 12 by means of a vibrating conveyor mechanism that constitutes its bottom wall. On the side of the applicator 54,
An activated carbon feeder 52 is provided to feed activated carbon toward the base 12 so as to fall from above onto the impregnation device 54 .

A sieve part 56 is installed at the rear of the impregnation machine 54 to remove a part of the activated carbon.

At the outlet of the applicator 54, a belt conveyor 58 is arranged at right angles to the conveyor 44. At the end of the conveyor 58, there is a friction machine 6 that causes part of the activated carbon to fall off due to frictional action.
2 is installed, and then a vibrating sieve 64 is installed.

There are two types of activated carbon attached to the base 12: those that are firmly fixed to the base and those that are weakly attached. Activated carbon that is weakly attached is susceptible to subsequent contact, vibration, etc. It may fall off easily and contaminate the environment.
It is desirable that they fall off during the manufacturing process. The falling off method includes a method using an impact force such as a vibrating conveyor, a method using a centrifugal force, a method using a friction method such as a brush or a coarse file, etc., and it is possible to arbitrarily select one or more of these methods. . In the illustrated system,
The sieving unit 56 and the sieving machine 64 remove unnecessary activated carbon by the impact force of the vibrating conveyor, and the friction machine 62 uses the rotating friction force of the file.

Following the sieving machine 64, a packaging section 66 in a known manner is arranged. The filter base from which unnecessary activated carbon has been removed is then packaged as a completed near conditioner deodorizing filter in a form suitable for shipping in a bag, cardboard, or a combination thereof. In addition, it is also possible to improve the appearance and quality by surrounding the completed filter with a ventilation material such as a non-woven fabric or a net using a heat seal or the like.

Coating Apparatus FIG. 1 is a schematic side view showing an enlarged main part of the coating apparatus according to the present invention, and FIG. 4 is a plan view thereof.

The dipping machine 28 and the blowing machine 32 have a common casing 142 divided by a partition wall 144, and a high-viscosity adhesive 143 (approximately 10 to 50 poise) is stored on the dipping machine 28 side. Piping 166 and piping 168 are attached to the lower part of the casing 142, respectively, for removing the drain in each divided tank.

A rotary bar 152 having four rectangular frames pivoted at 90° intervals is disposed above the adhesive bath, and this is connected to the motor 1.
54, it is continuously driven in the direction of the arrow in FIG. The substrate 12 moves in a bridge between the rollers 146 of the dipper 28, the guides 56 of the blower 32, and the exit rollers 148.

The rotating bar 152 functions as a pusher, thereby forcing the substrate 12 into the adhesive bath.

In the blower 32, two high pressure air pipes 162 are arranged above the guide 156. A plurality of (for example, 14) downward jet nozzles] 64 are attached to the pipe 162 in a staggered arrangement, and from here, high-speed air (about 30 to 250 m/s
ec) or sprayed continuously. As shown in FIGS. 5 and 6, each air nozzle 164 has a structure in which 14 injection ports 168 are formed at the tip of a chamber-shaped main body 166.

A threaded portion 172 is formed at the base of the main body 166, through which the nozzle 64 is connected to a branch pipe 163 attached to the air pipe 162.

In the coating device described above, the base 12 is connected to the pin conveyor 3.
4 (see FIG. 3), they are moved forward on the liquid surface of the adhesive bath, and are forced to be sequentially immersed into the adhesive bath by the rotating bar 152. This dipping is performed generally parallel to the opening direction of the lattice of the substrate 12, so that a thick adhesive layer can be quickly formed over the entire substrate 12 without forming air bubbles. Further, following the immersion, high-speed air is blown against the base 12, thereby causing the base 12 to
The excess adhesive that was covered with a film on the lattice in step 2 is removed.

Although the present invention has been described in detail in accordance with the preferred embodiments shown in the drawings, those skilled in the art to which the present invention pertains will appreciate that various modifications can be made to the above embodiments within the scope of the spirit of the present invention. It will be.

[Effects of the Invention] According to the present invention, after a filter substrate is forcibly immersed in an adhesive bath to apply an adhesive, excess adhesive that forms a film on the grid of the substrate is removed by air. Since the adhesive is blown away, it is possible to use a highly viscous adhesive.

In addition, since the above dipping is performed generally parallel to the opening direction of the lattice of the substrate, even if a high viscosity adhesive is used, no air bubbles will be formed and a thick adhesive layer will be formed over the entire substrate. can be formed quickly.

Furthermore, since it is a dipping type coating device, there is less possibility of contaminating the surrounding environment compared to conventional spray type coating equipment.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an enlarged main part of a coating device according to the present invention. FIG. 2 is a plan view showing an example of a deodorizing filter processed by the apparatus according to the present invention. FIG. 3 is a plan view showing the entirety of an example of a manufacturing system for a deodorizing filter for a near conditioner in which a coating device according to the present invention is installed. FIG. 4 is a schematic plan view showing an enlarged main part of the coating device according to the present invention. FIGS. 5 and 6 are front and side views showing an enlarged view of the air jet nozzle. 22.23... Free roller conveyor, 24... Expanding machine, 26... Pin conveyor, 28... Soaking machine, 3
2... Blowing machine, 36... Dryer, 38... First cutting machine, 44... Direction changing mechanism, 48... Second cutting machine, 52... Activated carbon supply machine, 54...・・Applying machine, 62・
... Friction machine, 64 ... Sieving machine, 66 ... Packing department, 1
42...Casing, 143...Adhesive, 152.
- Rotating bar 164...Air nozzle. Figure = 439

Claims (1)

[Claims] 1. A conveying member that advances a bath of a high viscosity adhesive and a stretched grid-like filter substrate along the liquid surface of the bath, and forcibly moves the substrate sequentially into the adhesive bath. An adhesive coating device for a lattice-shaped substrate 2, characterized in that it is equipped with a pushing member that is immersed in the adhesive, and a blowing member that blows air onto the substrate after being immersed in order to remove excess adhesive. 2. The device of claim 1, wherein said pushing member is a rotating bar. 3. The device of claim 1 or 2, wherein the adhesive has an initial viscosity of about 10 to 50 poise. 4. The apparatus according to any one of claims 1 to 3, wherein the air velocity is about 30 to 250 m/sec.