JP2007098378A - Filter and drying furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lint-free, inexpensive filter having simple structure and good durability, and a drying furnace equipped with said filter. <P>SOLUTION: Among filters for collecting various sorts of dust, the above filter is composed of nonwoven fabrics or laminates of nonwoven fabrics and woven fabrics and has at least one end thereof welded or fused. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a filter for capturing various types of dust collection. It is mainly used for drying ovens for drying painted surfaces of automobiles or vehicles.

  Various types of dust collecting filters have been improved according to the purpose of use. For example, as an air filter, a pleated knitted fabric composed of a knitted structure having a continuous loop structure is used as an air filter forming frame. An air filter molded body formed by welding is disclosed in Japanese Patent Application Laid-Open No. 2003-71215.

  Further, for example, as an air cleaning filter, an air-permeable sheet in which an adsorbent such as activated carbon is accommodated in a cell of a honeycomb-shaped core material, and a thermoplastic resin adheres to both surfaces of the honeycomb-shaped core material on the surface of the nonwoven fabric. Japanese Patent Laid-Open No. 10-137529 discloses a technique of welding a material with the thermoplastic resin.

  JP 2003-71215 A   Japanese Patent Laid-Open No. 10-137529

  As for the brush piece of the conventional washing brush for car wash machines, for example, a technique having various characteristics as described above is disclosed. However, in the technique disclosed in Japanese Patent Laid-Open No. 2003-71215, a pleated knitted fabric is used. However, the knitted fabric has a problem that it cannot be accurately captured when the dust collection that needs to be captured is extremely fine. Further, when the knitting yarn is unwound, there is a problem that yarn waste is generated and falls off.

  In the technique disclosed in JP-A-10-137529, a non-woven fabric is used. However, in order to weld it to other materials, a breathable sheet material having a thermoplastic resin adhered to the surface of the non-woven fabric is used. ing. Therefore, there is a problem that the manufacture of the breathable sheet material is complicated and the cost is increased. Moreover, there was a problem that lint such as a thermoplastic resin constituting the nonwoven fabric was generated and dropped from the end of the nonwoven fabric.

  The present invention has been made to solve the above-described problems, and aims to provide a low-cost, simple structure, and high durability filter without causing lint and dropping off. Yes. Moreover, it aims at providing the drying furnace which mounts the said filter.

  In order to solve the above-mentioned problems, the present invention is a filter formed of a nonwoven fabric or a laminate of a nonwoven fabric and a woven fabric, and at least one end thereof is welded or cut off. It has been done.

  Further, the second solving means is that the filter is formed by welding end portions of a plurality of the nonwoven fabrics of the same material or a laminate of the nonwoven fabric and the fabric, or the nonwoven fabric, or the nonwoven fabric and the fabric. A frame portion made of the same material is welded to the laminate.

  According to a third solution, the fusing portion of the filter is formed by melting and deforming by cutting with a cutter, electricity, light, electromagnetic waves, heat, high-pressure fluid, ultrasonic waves, high-frequency waves, or vibration. .

  The fourth solving means includes a driving source for producing hot air, and a jetting means for blowing the hot air onto the surface to be dried, and a drying device on which the filters of the first to third solving means are mounted. It is a furnace.

  The operation of the first solving means is as follows. That is, using a non-woven fabric for the filter, for example, heating or pressing a tool such as an iron against the end face of the non-woven fabric formed in a flat plate shape, a disk shape, a block shape, etc. By heating and welding in the vicinity, the thermoplastic resin in the non-woven fabric is melted and deformed at the ends, and the ends are joined together. Therefore, the hot air that has entered the filter does not leak from the end. In addition, it is possible to improve the durability of the filter without generation of lint or the like such as thermoplastic resin in the nonwoven fabric. Further, it is possible to suppress the shape deformation with respect to the external pressing force. Further, the end portions can be fixed in a state where a certain gap is maintained between the resins. Even when fixed in the above state, it has the same effect as when integrally bonded. Also, when blown, it has the same effect as welding.

  In addition, the action of the second solving means is that the end portions of a plurality of nonwoven fabrics of the same material or a laminate of the nonwoven fabric and the fabric are welded to each other, or the nonwoven fabric or the laminate of the nonwoven fabric and the fabric is laminated. A frame of the same material is welded to the body. Therefore, the nonwoven fabric, the laminate of the nonwoven fabric and the fabric, and the thermoplastic resin of the same material constituting the frame portion are melted and fixed to each other. Therefore, it is possible to weld with extremely high strength compared to welding of different materials. Therefore, it is possible to provide a filter using a large-area nonwoven fabric or a laminate of a nonwoven fabric and a woven fabric by welding a plurality of flat nonwoven fabrics of the same material or a laminate of the nonwoven fabric and the woven fabric. Further, even when a nonwoven fabric of the same material or a laminate of a nonwoven fabric and a fabric and a frame portion are welded, the nonwoven fabric is not detached from the frame because it can be welded with extremely high strength.

  Further, the action of the third solution means that the filter is blown by a cutter, electricity, light, electromagnetic waves, heat, high-pressure fluid, ultrasonic waves, high-frequency waves, or vibrations. In the fusing part at that time, the nonwoven fabric is melted and deformed by heat generated by the various means. Therefore, it is possible to manufacture a filter having an accurate shape that does not fall off due to generation of lint such as thermoplastic resin in the nonwoven fabric only by fusing.

  In addition, the fourth solution means includes a drive source for producing hot air and a jet means for blowing hot air onto the surface to be dried, and the filters of the first to third solution means are provided with a drying furnace. It is mounted on. The filter of the first to third solution means that the lint such as thermoplastic resin in the nonwoven fabric does not fall off and can be prevented from being deformed and the durability can be improved. A drying furnace having high durability and high durability can be manufactured.

  As described above, the filter and the drying furnace of the present invention have a high durability that can suppress the deformation of the filter for a long period of time without generating lint such as thermoplastic resin in the nonwoven fabric from the filter and falling off. A filter and a drying furnace having properties can be provided.

  The first invention is a filter for capturing various types of dust collection, wherein the filter is formed of a nonwoven fabric or a laminate of a nonwoven fabric and a fabric, and at least one end thereof is welded or cut off. It is formed. Therefore, when the welded or cut end portions are heated, the thermoplastic resin in the nonwoven fabric or in the laminated body of the nonwoven fabric and the woven fabric is melted and deformed and integrally joined. Therefore, the hot air that has entered the filter does not leak from the end. In addition, it is possible to improve the durability of the filter without causing lint of thermoplastic resin or the like in the nonwoven fabric or in the laminate of the nonwoven fabric and the fabric, and dropping off. Further, it is possible to suppress the shape deformation with respect to the external pressing force. Further, the end portions can be fixed in a state where a certain gap is maintained between the resins. Even when fixed in the above state, it has the same effect as when integrally bonded. Also, when blown, it has the same effect as welding. For example, when the shape of the filter is a rectangular flat plate, by welding or cutting four end faces on the outer periphery, lint does not occur and fall off from the end, and shape deformation is greatly suppressed. I can do things. Furthermore, when shape deformation is further suppressed, a method of welding a part of the upper surface or the bottom surface other than the four end surfaces can be employed.

  A second invention is the filter according to the first invention, wherein the filter is formed by welding end portions of a plurality of the nonwoven fabrics of the same material, or a laminate of the nonwoven fabrics and the fabrics, or A frame portion of the same material is welded to a nonwoven fabric or a laminate of a nonwoven fabric and a fabric. In the case of the same material, the non-woven fabric, the laminate of the non-woven fabric and the woven fabric, and the thermoplastic resin constituting the frame are melted and deformed to adhere to each other. Therefore, it is welded with extremely high strength compared to welding of different materials. it can. For example, when a plurality of flat-plate nonwoven fabrics of the same material or a laminate of nonwoven fabric and woven fabric are welded, a filter using a large-area nonwoven fabric or a laminate of nonwoven fabric and woven fabric can be provided. Also, when welding the same material non-woven fabric and frame, or non-woven fabric and woven fabric laminate and frame, it can be welded with extremely high strength, so that the non-woven fabric or non-woven fabric and woven fabric laminate must be detached from the frame. There is no. Further, when a nonwoven fabric or a laminate of a nonwoven fabric and a woven fabric is temporarily fixed and welded to the frame portion, the nonwoven fabric or a laminate of the nonwoven fabric and the woven fabric can be fixed to the frame only by a simple and rapid operation.

  According to a third aspect of the present invention, in the filter according to the first to second aspects, the fusing part of the filter is melted and deformed by cutting with a cutter, electricity, light, electromagnetic waves, heat, high-pressure fluid, ultrasonic waves, high frequency, or vibration. It is formed with the nonwoven fabric which did. Therefore, the non-woven fabric is melted and deformed in the melted portion by heat generated by the various means. For this reason, the resins are fixed to each other only by fusing, so that lint and the like do not occur and fall off. Moreover, since it is not necessary to perform welding as a separate process after fusing, a filter having an accurate shape can be quickly manufactured.

  A fourth invention is a drying furnace provided with a heat driving source for producing hot air and jetting means for jetting hot air to the surface to be dried, and on which a filter according to the first to third inventions is mounted. is there. Since the filter according to the first to third inventions has the operations and effects as described above, it is possible to manufacture a drying furnace with high drying performance and durability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

  A first embodiment is shown in FIGS. FIG. 1 is a perspective view of the filter of the present invention as viewed from the front side. In FIG. 1, 1 is a filter, 2 is a nonwoven fabric, 3 is a filament, 4 is an end surface, 5 is a corner, 6 is a top surface, 7 is a bottom surface, and 8 is a welded portion. FIG. 2A is a cross-sectional view of FIG. (B), (C), (D), and (E) of FIG. 2 are cross-sectional views of other embodiments. In FIG. 2B, 11 is a filter, and 48 is a welded portion. In FIG. 2C, 9 is a fusing part and 21 is a filter. In FIG. 2D, 18 is a welded portion, and 31 is a filter. In FIG. 2E, 9 is a fusing part, 28 is a welding part, and 41 is a filter. FIG. 3 is a perspective view of a filter according to another embodiment as viewed from the front side. In FIG. 3, 10 is a frame, 38 is a welded portion, and 51 is a filter.

  As shown in FIGS. 1 and 2A, the filter 1 of the present invention is formed in a flat plate shape and is formed of a nonwoven fabric 2 composed of a plurality of filaments 3. The filament 3 is formed of a thermoplastic resin. For example, polyesters such as polyethylene terephthalate and polybutylene terephthalate, nylons such as polyamide 6 and polyamide 66, polyolefins such as polyethylene and polypropylene, urethane, acrylic, vinyl chloride, silicon, fluorine, etc. Have been used. Moreover, the manufacturing method of the nonwoven fabric 2 pressurizes the filament 3 with a hot roll and bonds between the filaments 3, a chemical bond method that bonds between the filaments 3 using an adhesive called a binder, etc. Any method can be adopted. Furthermore, the filament 3 may be used by mixing natural fibers such as cotton, silk, hemp, etc. in addition to the thermoplastic resin, and mixing with the thermoplastic resin.

  A weld 8 is formed on the end face 4. The welded portion 8 brings the heated iron or the like into contact with the end surface 4 or heats the end surface 4 in the vicinity of the end surface 4 in a non-contact manner, whereby the filament 3 on the end surface 4 of the nonwoven fabric 2 is melted and deformed. They are joined together. Therefore, the warm air that has entered the filter 1 does not leak from the end face 4. Further, the filament 1 of the nonwoven fabric 2 does not fall off due to occurrence of yarn waste and the filter 1 is improved in durability. Moreover, the welding part 8 can also be fixed in a state where a constant gap is maintained between the filaments 3. For this reason, the filament 3 does not fall off, and the yarn 3 of the filament 3 does not fall off due to the occurrence. Further, since the filaments 3 are fixed in a state where a constant gap is maintained, the mechanical strength of the welded portion 8 increases while the shape of the filter 1 is maintained. For this reason, it is possible to suppress the deformation of the shape against the external pressing force. In addition to the above, the method for forming the welded portion 8 is, for example, a method such as electricity, light, electromagnetic wave, heat, high-pressure fluid, ultrasonic wave, high frequency, or vibration, as long as the nonwoven fabric 2 can be melted and deformed. You can choose. As for the fixed state of the welded portion 8, as described above, the melted filament 3 is integrated so as to form an end face 4 without a gap, and the distance between the filaments 3 is constant. You may fix in the state holding the space | gap. Furthermore, the formation part of the welding part 8 can form the corner part 5, the upper surface 6, the bottom face 7, etc. other than the end surface 4 as needed.

  Further, as shown in FIG. 2B, the welded portion 48 can be formed by pressing and deforming a constant width of the end portion from the upper surface 6 and the bottom surface 7. Since the filament 3 in the nonwoven fabric 2 is melted and deformed and crushed in the welded portion 48, there is no occurrence of lint of the filament 3 and dropping off at all. Further, the hot air entering the filter 11 does not leak from the welded portion 48. You may form the formation part of the welding part 48 in the edge part of a perimeter part. Further, it may be formed in a part of the central portion or the like.

  Further, as shown in FIG. 2C, the fusing portions 9 can be provided on both sides. The fusing part 9 cuts the filament 3 of the nonwoven fabric 2 using a method such as cutter, electricity, light, electromagnetic wave, heat, high pressure fluid, ultrasonic wave, high frequency, or vibration when cutting the filter 21, The filament 3 is formed by being melted and deformed. Therefore, the non-woven fabric is melted and deformed in the fusing part 9 by heat generated by the various means. For this reason, the resins are fixed to each other only by fusing, and the yarn 3 of the filament 3 is not generated and dropped off. Moreover, since it is not necessary to perform welding as a separate process after cutting, a filter having an accurate shape can be manufactured quickly and inexpensively.

  Further, as shown in FIG. 2D, the welded portion 18 can be formed by heating the end portions of the two filters 1 in contact with each other. Since the same material is welded to each other, the welded portion 18 can be welded with an extremely high strength compared to welding of different materials. By using the above-described method, several tens of filters 1 are welded to each other, so that an extremely large area filter can be manufactured.

  Further, as shown in FIG. 2E, the end portions of the two filters 1 may be brought into contact with each other and heated to form the welded portion 28 and the fusing portions 9 on both sides. By using the above-mentioned method, several tens of filters 1 are welded to each other and then cut into a predetermined shape, so that even a large-area filter having a complicated shape can be quickly and easily manufactured.

  Further, as shown in FIG. 3, the filter 51 having the welded portion 38 can be manufactured by welding the frame 10 to the filter 1. The filter 1 and the frame 10 are made of the same material. Since the filter 51 is integrated and fixed, the filter 51 can increase the mechanical strength against the deformation of the shape. Therefore, the filter 51 can have high durability.

  Next, the manufacturing procedure of the nonwoven fabric 2 will be described. First, a filament 3 is obtained by melt spinning a thermoplastic resin such as polyethylene terephthalate, polybutylene terephthalate, polyamide 6, polyamide 66, polyethylene, and polypropylene. A special needle is inserted into the obtained filament 3 to entangle the filament 3 three-dimensionally. As described above, the manufacturing method for three-dimensionally intertwining is generally called needle punching, and the three-dimensionally intertwined filament 3 is called a web. Thereafter, a high-pressure water flow of about 100 kg to 150 kg is applied to the web to bond the filaments 3 to obtain the nonwoven fabric 2. The manufacturing method is generally called a hydroentanglement method. In addition, the manufacturing method of the nonwoven fabric 2 can employ | adopt any method other than the above, if it is a method in which welding or fusing is possible. Moreover, the nonwoven fabric 2 can be used by welding a long sheet made by each manufacturer of the nonwoven fabric after cutting or by fusing.

  The fusing method can be a fusing method using a cutter, electricity, light, electromagnetic waves, heat, high-pressure fluid, ultrasonic wave, high frequency, or vibration, but energy that can melt and deform the filament 3 is generated at the time of fusing. Any method is acceptable. As the type of energy, for example, electric energy, light energy, electromagnetic wave energy, frictional heat, heat energy such as radiant heat, high pressure fluid energy, ultrasonic energy, high frequency energy, or vibration energy can be employed. Moreover, as a kind of cutter, the Thomson type | mold which can apply an electric heat, an electric heating scissor, an electric heating knife, etc. are employable, for example. Moreover, the said method can be employ | adopted timely according to the intended purpose also as a method of forming a welding part. As for the formation state of the filters, as shown in FIGS. 2D and 2E above, a plurality of filters were stacked in addition to forming the large-area filter by welding the end portions to each other. Thereafter, as shown in FIG. 2B, a filter having a large thickness can be formed by pressing and welding a constant width of the end portion from the upper surface and the bottom surface. Further, the welded portion can be welded by pressing, for example, a central portion other than the end portion from the top surface and the bottom surface in addition to the end portion. Furthermore, a filter using a laminate of a nonwoven fabric and a woven fabric is not shown in Example 1, but the method of welding or fusing, the formation state, the action, the effect, etc. are as described in Example 1 above. The same.

Next, Example 2 is shown in FIG. FIG. 4 is a sectional view of a drying furnace in which the filter of the present invention is used. In FIG. 4, 55 is a drying furnace, 56 is a drive source, 57 is a spout, and 58 is a surface to be dried.

  In the drying furnace 55, warm air is generated by a driving source 56. Then, the surface 58 to be dried on the outer surface of the automobile is dried by ejecting the warm air toward the surface 58 to be dried from the ejection port 57 as a jetting means for spraying warm air on the surface 58 to be dried. The filter 1 is attached to the jet outlet 57 and filters dust collected in the warm air produced by the drive source 56. The drying furnace 55 is mainly used for drying the painted surface after painting the outer surface of the automobile.

  Since the drying furnace 55 according to the second embodiment has the above-described configuration, the filament 3 of the non-woven fabric 2 constituting the filter 1 is generated and dropped and adheres to the surface 58 to be dried. There is nothing. The drying furnace 55 can accurately eject hot air, which is not mixed with the filament 3 of the nonwoven fabric 2 constituting the filter 1, to the surface to be dried 58 in addition to dust collection and the like. Therefore, an extremely high performance drying furnace 55 can be provided.

  The present invention is used as a filter for capturing various types of dust collection. It is mainly used for drying ovens for drying painted surfaces of automobiles or vehicles. In addition to the above, it can be used widely and suitably as a filter for various air conditioners, dryers, dehumidifiers, blowers, vacuum cleaners, ventilation fans and the like.

  The perspective view which looked at the filter of the present invention from the front side   (A) Cross-sectional view of FIG. 1 (B), (C), (D), and (E) Cross-sectional views of other embodiments   The perspective view which looked at the filter of other embodiments from the front side   Sectional view of a drying oven in which the filter of the present invention is used

Explanation of symbols

1, 11, 21, 31, 41, 51 Filter 2 Non-woven fabric 3 Filament 4 End face 5 Corner part 6 Top face 7 Bottom face 8, 18, 28, 38, 48 Welding part 9 Fusing part 10 Frame 55 Drying furnace 56 Driving source 57 Jet outlet 58 Surface to be dried

Claims (4)

  In the filter for capturing various dusts, the filter is formed of a nonwoven fabric or a laminate of a nonwoven fabric and a fabric, and is formed by welding or fusing at least one end. Filter.   2. The filter having the configuration according to claim 1, wherein the filter is formed by welding a plurality of nonwoven fabrics of the same material, or end portions of a laminate of a nonwoven fabric and a fabric, or the nonwoven fabric or the nonwoven fabric. A filter characterized in that a frame portion of the same material is welded to a laminate of woven fabric and fabric.   The filter having the configuration according to claim 1 or 2, wherein the fusing part of the filter is formed by being melted and deformed by cutting with a cutter, electricity, light, electromagnetic waves, heat, high-pressure fluid, ultrasonic wave, high frequency, or vibration. A filter characterized by being.   4. A drying furnace equipped with a drive source for producing hot air and jetting means for jetting hot air onto a surface to be dried, and wherein the filter according to claim 1 is mounted.

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