JPH1057740A - Filter and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a filter used for an air filter, etc., having rigidity capable of absorbing the dimensional variation of products and low in cost. SOLUTION: This filter is provided with a frame part 7 which is provided on four peripheries of a folded filter medium 3 and which consists of paper material whose section is formed into a frame, and a projecting part 11 formed by allowing a foamed elastic filler 9 charged inside the frame part 7 to project toward the outside of the frame part 7. The frame part 7 so adhered to four peripheries of the folded filter medium 3 through the foamed elastic filler 9, allowing suitable rigidity to be obtained by the frame part 7 of paper material to lessen the deformation, and also absorb the dimensional variation of products and prevent unfiltered fluid from flowing into the device by the projecting part 11 of the foamed elastic filler 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter used for filtering a fluid such as an air conditioner and an air purifier, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, this type of filter has been disclosed in
One described in Japanese Patent Publication No. 14095 is known.

Hereinafter, the filter will be described with reference to FIGS. 9 and 10. FIG. As shown in the figure, a foldable filter medium 101 and a dense / dense 2 having elasticity in the thickness direction are provided.
A filter 104 is formed by bonding an outer frame 102 made of a nonwoven fabric having a layer structure with an adhesive 103 having rigidity at normal temperature.

[0004]

In such a conventional filter 104, when an adhesive 103 made of a hot-melt resin is used, the filter material 101 and the outer frame 102 made of a nonwoven fabric having the adhesive 103 applied to the surface are used. Since it is heated and melted and adhered, it may be difficult to completely seal and a gap may be formed between the filter medium 101 and the outer frame 102. Since the outer frame 102 is formed of a non-woven fabric, the rigidity is small, the shape is easily deformed, and the air is cleaned. Unfiltered fluid flowed into the device when incorporated into the device.

Further, since the sealing between the outer frame 102 and the device in which the filter 104 is incorporated is ensured by the elasticity of the nonwoven fabric forming the outer frame 102, gaps are likely to occur due to variations in materials and product dimensions. there were.

[0006] Further, a heating step for heating and melting the adhesive 103 is required, and there is a problem that the manufacturing cost in the manufacturing process is increased. Therefore, it is necessary to obtain a filter which can absorb variations in product dimensions and has a low manufacturing cost. Has been requested.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a filter having rigidity, capable of absorbing variations in product dimensions, and having a low manufacturing cost, and a method of manufacturing the filter.

[0008]

In order to achieve the above object, a filter according to the present invention has a frame portion formed of a paper material having a cross section formed in a frame shape provided on four circumferences of a fold filter material, and the frame portion. A foamed elastic filler filled in the inner surface of the frame portion is formed on the outer surface of the frame portion, and the frame portion is adhered to the four circumferences of the fold filter medium via the foamed elastic filler material. is there.

According to the present invention, the filter can be made rigid by the frame portions provided on the four circumferences of the fold filter material, and the unfiltered fluid flows into the device when the device is assembled into the device by the protrusion. A filter that can be prevented is obtained.

The filter manufacturing method according to the present invention also includes a fold folding step of forming a fold filter material, a frame forming step of forming a frame by a paper material, and a frame inserting step of inserting the frame into a jig. A filling step of filling the foamed elastic filler, a bonding step of bonding the frame portion to the four circumferences of the fold filter material via the filled foamed elastic filler, and a releasing step of separating from the jig after the bonding. It is manufactured by

According to the present invention, it is possible to provide a method of manufacturing a filter which does not require a heating step of heating and melting the adhesive, thereby reducing the manufacturing cost.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a pleated filter medium comprising a frame portion made of a paper material having a cross section formed in a frame shape, and a foamed elastic filler filled on the inner surface of the frame portion. A protrusion is formed on the outer surface of the frame, and the frame is adhered to four folds of the fold filter material via the foamed elastic filler, and cardboard paper or the like is used as a paper material. Compared to the case of using an outer frame made of a nonwoven fabric, the rigidity of the filter is improved, and the elasticity of the protruding portion can absorb variations in the filter product method. This has the effect of preventing the formation of a gap through which the unfiltered fluid passes between the device and the filter, thereby improving the filtration efficiency.

[0013] Further, a flat filter medium is folded to form ridges and valleys alternately to form a fold-fold filter medium, and a rectangular paper material is formed by folding a rectangular cross-section into a frame shape.
A frame portion forming step of forming a longitudinal direction opening to form a frame portion, a frame portion inserting step of inserting a frame portion into a jig to fill the inner surface of the frame portion with a filler, and inserting the jig into the jig Filling the inner surface of the frame portion with the foamed elastic filler, forming a protruding portion on the outer surface of the frame portion, and forming the protruding portion of the filled foamed elastic filler in four rounds of the fold filter medium in a state where foaming has started. It is manufactured by a bonding step of bonding the frame portion with the foamed elastic filler, and a release step of separating from the jig after bonding.
As in the case of using a hot melt resin as the adhesive, there is no need for a heating step of heating and melting the filter medium and the outer frame made of non-woven fabric coated with an adhesive on the surface, thereby simplifying the manufacturing process and reducing the manufacturing cost. Also has the effect of being cheaper.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0015]

【Example】

(Example 1) As shown in FIGS. 1 to 8, the filter 1 is manufactured by bending a flat filter medium made of PP nonwoven fabric or glass fiber to alternately provide peaks and valleys, and using a solid part 2. A fold folding step 4 for forming a fold filter medium 3 held at a certain size, and a paper material made of cardboard paper or the like having a thickness of about 0.5 mm is cut into a rectangular shape, and the opening 5 is punched out in the longitudinal direction. A frame forming step of bending a long piece 6 to be inserted into an edge of the folding filter medium 3 inward so that both ends in the longitudinal direction can be formed so as to be able to be attached to each other and forming a frame 7 having a frame-shaped cross section. 8 and an inner surface of the frame 7 to be filled with a foamed elastic filler 9 in which a polyurethane main agent and polymethylene, polyphenyl, polyisocyanate, etc. are mixed.
The ribs 10 protruded inward so that the openings 5 formed therein fit and the foamed elastic filler 9 that has passed through the openings 5 protrudes from the outer surface of the frame 7 to form the protrusions 11. Jig 1 provided with recess 12 for forming protrusion 11
3, a frame insertion step 14 for inserting the frame 7 into the jig 13 and filling the inner surface of the frame 7 inserted into the jig 13 with the foam elastic filler 9;
Filling step 15 for forming protrusion 11 on the outer surface of frame 7
The jigs 13 are attached to the four folds of the fold filter material 3 in a state where the filled foam elastic filler 9 has begun to foam without dripping.
Is moved so that the inner surface of the frame 7 is brought into contact with the inner surface of the frame 7, and the foaming elastic filler 9 provided on the inner surface of the frame 7 adheres the frame 7 to four folds of the fold filter material 3; After adhering the folds 7 to the filter media 3, the jig 13 is returned to its original position, and the filter 1 is released from the jig 13 to release the manufactured filter 1. Thus, the filter 1 is manufactured.

When the filter 1 manufactured as described above is incorporated in an air cleaning device, a filter housing provided on a suction side of an air flow path 20 formed through a fan motor 19 in a main body 18 of the air cleaning device. The filter 21 is mounted in the portion 21 by utilizing the elasticity of the protruding portion 11 made of the foamed elastic filler 9 formed on the outer periphery of the filter 1, and a front panel 22 is provided on the windward side of the filter 1.

When the air purifier incorporating the filter 1 is operated as described above, the contaminated air sucked from the front panel 22 by the fan motor 19 is removed from the filter housing 21.
The protruding portion 11 is tightly attached to the inner surface, passes through the filter 1 mounted in a state where the gap is closed, and is filtered and discharged by the foldable filter medium 3.

Since the pleated filter medium 3 is held by the frame portion 7 made of cardboard paper or the like having an appropriate thickness, the filter 1 has an appropriate rigidity when incorporated in an apparatus such as an air purifier. The gap is reliably closed by the protruding portion 11 formed by the foamed elastic filler 9 with less deformation and easy installation, preventing the unfiltered fluid from flowing into the device, and causing variations in the product dimensions of the filter 1. However, while being absorbed by the protruding portion 11, recycled paper can be used and the filter can be formed to be lightweight, and the incineration property of the contaminated filter 1 is improved.

Further, since the frame portions 7 provided on the four circumferences of the fold filter material 3 are formed of paper material, the type and other necessary items of the filter 1 must be clearly printed or designed on the frame portions 7. And convenience is improved.

In the first embodiment, the protruding portion 11 of the foamed elastic filler 9 is provided on the outer peripheral position of the frame portion 7 made of a paper material.
It goes without saying that the protruding portion 11 may be pressed to prevent the unfiltered fluid from flowing into a device such as an air cleaning device.

[0021]

As is apparent from the above embodiments, according to the present invention, a filter having rigidity due to paper material, capable of absorbing variations in product dimensions, and capable of preventing unfiltered fluid from flowing into the apparatus. Can be provided.

Further, it is possible to provide a method of manufacturing a filter in which the manufacturing process is simplified and the manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of a filter according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the frame of the filter of the first embodiment is inserted into a jig.

FIG. 3 is a perspective view showing a relationship between a fold filter material, a frame portion, and a jig of the filter of the first embodiment.

FIG. 4 is a cross-sectional view showing a state of the filter of Example 1 at the time of filling with a foamed elastic filler.

FIG. 5 is a cross-sectional view showing a state in which the frame portion of the filter of Example 1 is adhered to a pleated filter medium.

FIG. 6 is a process chart showing the steps of the method for manufacturing a filter of Example 1;

FIG. 7 is a sectional view showing a state in which the filter of the first embodiment is incorporated in an air cleaning device.

FIG. 8 is an enlarged view showing a state when the filter according to the first embodiment is incorporated in an air cleaning device.

FIG. 9 is a perspective view showing a configuration of a conventional filter.

FIG. 10 is a sectional view showing the configuration of the filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter 3 Pleated filter medium 4 Pleated step 5 Opening part 7 Frame part 8 Frame part formation step 9 Foam elastic filler 11 Protruding part 13 Jig 14 Frame part insertion step 15 Filling step 16 Adhesion step 17 Release step

Claims (2)

[Claims] 1. A frame portion made of a paper material having a cross-section formed in a frame shape provided on the four circumferences of a fold filter material, and a foamed elastic filler filled in an inner surface of the frame portion protrudes into an outer surface of the frame portion. A filter comprising a formed protruding portion, and the frame portion bonded to four turns of the pleated filter material via the foamed elastic filler. 2. A fold-folding step in which a flat filter medium is folded to form folds and valleys alternately to form a fold-fold filter medium, a rectangular paper material is folded to form a cross section in a frame shape, and a longitudinal opening is formed. Forming a frame portion to form a frame portion,
A frame part insertion step of inserting a frame part into a jig to fill the inner surface of the frame part with a filler, and filling an inner surface of the frame part inserted with the jig with a foamed elastic filler, and an outer surface of the frame part A filling step of forming a protruding portion, a bonding step of bonding the frame portion to the four folds of the fold filter medium with the filled foamed elastic filler being foamed, and a jig after bonding A method of manufacturing a filter manufactured by a releasing step of separating more.