JP2006315169A - Backup pad for supporting abrasive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the labor for replacing abrasive by eliminating the need for aligning a hole position in fitting the abrasive having a dust sucking hole to a backup pad for supporting the abrasive. <P>SOLUTION: This backup pad for supporting the abrasive includes: a base material having a second principal surface opposite to a first principal surface and having at least one dust sucking hole penetrating the first principal surface and the second principal surface; and a ventilating member joined to the first principal surface of the base material and having a plurality of holes extending from the fitting surface to which the abrasive is fitted toward the first principal surface of the base material. The ventilating member causes powder dust to flow out from the fitting surface to the second principal surface of the base material in cooperation with the base material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an abrasive backup pad for supporting a sheet-like abrasive (abrasive cloth) having holes for dust absorption.

  The abrasive backup pad used by being attached to the dust-absorbing sander has about 6 to 10 dust-absorbing holes with a diameter of about 10 mm. In use, the abrasive material in which dust suction holes are similarly formed is mounted on the abrasive pad mounting surface of the backup pad so that the holes overlap.

  The mounting of the abrasive material requires work for attaching the abrasive material while visually checking the positions of the holes in the pad and the abrasive material and aligning the holes. On the other hand, if the hole position of the abrasive is deviated from the hole position of the backup pad, the hole area becomes narrow, and sufficient dust absorption efficiency cannot be obtained. Therefore, when the type of abrasive is changed and the hole position and hole shape for dust absorption are changed, it is necessary to change the pad accordingly, and the replacement of the abrasive requires complicated work.

  In order to improve such a problem, for example, in Patent Document 1, a dust absorbing hole of an abrasive backup pad is used as an annular groove to reduce labor for meeting the hole position. However, when the hole positions of the abrasive are not formed on the same circumference, the hole positions are not aligned with the annular groove, and the solution of the problem is insufficient.

Patent Document 2 proposes that the hole size of the backup pad is made larger than the hole size of the abrasive to facilitate alignment. Also, when using an abrasive whose hole positions are not aligned, it is necessary to change the pad accordingly, and the replacement work is complicated.
Special table 2002-529264 Japanese Utility Model Publication No. 57-28870

  The present invention solves the above-mentioned conventional problems, and the object of the present invention is to eliminate the need to align the hole position when attaching an abrasive having a dust-absorbing hole to the backup pad for supporting the abrasive, and polishing. The purpose is to reduce the labor of replacing materials.

  The backup pad for supporting an abrasive according to the present invention has a second main surface opposite to the first main surface, and a base material having at least one dust absorption hole penetrating the first main surface and the second main surface; Abrasive material supporting member having an attachment surface to which the abrasive material is attached and a plurality of holes extending from the attachment surface toward the first main surface surface of the base material and bonded to the first main surface of the base material. It is a backup pad. Here, the ventilation member cooperates with the base material to cause dust to flow out from the mounting surface of the abrasive to the second main surface of the base material.

  In the abrasive pad backup pad according to the present invention, the total area of the openings on the mounting surface of the ventilation member may be 15% or more with respect to the total area of the abrasive contact surface.

  It is possible to attach an abrasive material with holes for dust absorption to any position of the pad, and it is not necessary to align the hole positions when attaching the dust-absorbing abrasive material to the backup pad for supporting the abrasive material.

  The backup pad for supporting an abrasive according to an embodiment of the present invention includes a base material and a ventilation member having an abrasive mounting surface installed on the base material as main components. A base material has the 1st main surface (main surface) which is a mounting surface of a ventilation member, and the 2nd main surface which is a sander mounting surface. Hereinafter, the term “main surface” simply refers to the first main surface. FIG. 1 is a view showing an example of a sander mounting surface and a side surface of a sheet-like base material (base sheet material). A sander mounting bolt 2 is attached to the center portion of the base material 1, and six dust suction holes 3, 3 ',... Penetrating to the main surface are provided.

  The structure of the base material is sufficient as long as it can suck polishing dust from the main surface side when sucked from the sander mounting surface and can be supported on the main surface such as a ventilation member described later. It is not limited to the example. For example, the number of dust suction holes may be increased or decreased. That is, the number of dust suction holes may be one, or a large number of dust suction holes may be gathered to form an opening structure or a mesh structure.

  The base material is preferably formed of a rigid material. This is because the driving force of the sander is efficiently transmitted to the abrasive. As the material of the base material, plastic, fiber reinforced plastic, metal or the like is used. Examples of the plastic include thermoplastic resins: polyethylene, polypropylene, polystyrene, acrylonitrile / styrene resin, ABS resin, methacrylic resin, vinyl chloride, polyamide, polyacetal, ultrahigh molecular weight polyethylene, polyethylene terephthalate, polybutylene terephthalate, polymethylpentene, and polycarbonate. , Modified polyphenylene ether, polyphenylene sulfide, polyether ether ketone, polytetrafluoroethylene, polyetherimide, polyarylate, polysulfone, polyethersulfone, polyamideimide, etc., thermosetting resins: phenol resin, urea resin, melamine resin, Examples include unsaturated polyester resins, alkyd resins, epoxy resins, diallyl phthalate resins, and the like. Examples of the reinforcing fiber of the fiber reinforced plastic include glass fibers, carbon fibers, aramid fibers, metal fibers and other long fibers, short fibers and the like, which are used for reinforcing the above-mentioned plastics. These plastics may be added with antioxidants, various pigments, ultraviolet absorbers, fillers and the like in order to increase durability and strength. Examples of the metal include stainless steel, aluminum alloy, and magnesium alloy.

  What is necessary is just to determine suitably the shape and dimension of a base material according to a use. For example, a disk shape or a rectangular sheet shape is common. This also applies to the sheet material described below.

  FIG. 2 is a diagram illustrating an example of the abrasive mounting surface and side surfaces of the ventilation member. The ventilation member shown in the figure is in the form of a sheet or plate, and the abrasive mounting surface has an opening structure 20. The opening structure is a collection of a plurality of separated holes. A preferred opening structure is a structure in which a large number of through holes are assembled. The shape of the through hole is not limited as long as it has a function of allowing the polishing residue to pass through without hindrance. For example, in addition to the circular through hole 21 shown in FIG. 2A and the square through hole 22 shown in FIG. 2B, a polygon such as a triangle and a hexagon, a rectangle, a diamond, a star, and an ellipse It may be a shape or the like.

  The size, number, and arrangement of the through holes are determined so as to realize an aperture ratio that can support the abrasive during the polishing operation and allows the polishing residue to pass through without any hindrance. These preferable values and modes are appropriately determined in consideration of the material of the ventilation member.

  The ratio of the total opening area of the abrasive mounting surface of the ventilation member to the total area of the abrasive contact surface is not limited, but is preferably 15% or more, more preferably 20% or more, and even more preferably 25% or more. If the ratio is 15% or more, when attaching a sheet-like abrasive having holes for sucking dust, even if the hole positions are not particularly aligned, a good dust suction force is more reliably maintained. The “total area of the abrasive contact surface” refers to the total area of contact between the backup pad and the abrasive when the abrasive is attached to the ventilation member. Therefore, when there is an annular base or annular wall as described later around the abrasive mounting surface of the ventilation member, not only the area of the abrasive mounting surface but also the area of the annular base or annular wall in contact with the abrasive is included. It is.

  FIG. 3 is a diagram showing another example of the abrasive mounting surface and side surfaces of the ventilation member. The abrasive mounting surface shown in FIG. 3A has a corrugated mesh structure 31. The abrasive mounting surface shown in FIG. 3B has a lattice-type mesh structure 32. The mesh structure is composed of a plurality of through holes and is included in the opening structure.

  The opening structure of the ventilation member is not limited to the above example, as long as it can pass the polishing residue and can attach the abrasive. The ventilation member may have, for example, an opening structure composed of an irregular through hole such as a nonwoven fabric. 4A to 4F and FIGS. 5A to 5D are plan views showing examples of the opening structure of the ventilation member. In each structural example, a plurality of openings 41 and 51 are gathered in the abrasive mounting surfaces 40 and 50.

  4A and 4B exemplify the opening structure of the ventilation member, where FIG. 4A is a structure including a row of parallel octagonal holes, FIG. 4B is a structure combining hexagonal holes and a lattice, and FIG. 4C is a radial hexagonal hole. (D) represents a structure composed of circular holes having different dimensions, (e) represents a structure composed of a plurality of concentric holes, and (f) represents a structure composed of a plurality of wavy holes. FIG. 5 illustrates a rectangular sheet-like abrasive, (a) is a structure composed of parallel hexagonal holes, (b) is a structure in which elongated holes are arranged alternately, and (c) is a plurality of wavy holes. (D) shows the structure which consists of a parallel square hole row | line | column.

The ventilation member may be formed of a material having sufficient strength to support the abrasive and realize the polishing function. Examples of the material of the ventilation member include thermoplastic resins: polyethylene, polypropylene, polystyrene, acrylonitrile / styrene resin, ABS resin, methacrylic resin, vinyl chloride, polyamide, polyacetal, ultrahigh molecular weight polyethylene, polyethylene terephthalate, polybutylene terephthalate, and polymethyl. Pentene, polycarbonate, modified polyphenylene ether, polyphenylene sulfide, polyether ether ketone, polytetrafluoroethylene, polyetherimide, polyarylate, polysulfone, polyethersulfone, polyamideimide, etc., thermosetting resins: phenolic resin, urea resin, Synthetic resins such as melamine resin, unsaturated polyester resin, alkyd resin, epoxy resin, diallyl phthalate resin, or elastomer Mer: Natural or synthetic rubber elastomers with elasticity such as polyurethane, natural rubber, polybutadiene, polyisoprene, EPDM polymer, polyvinyl chloride (PVC), polychloroprene, nitrile rubber, silicone rubber, fluoro rubber or styrene / butadiene copolymer One or more are used. The ventilation member is composed of one or more of a molded product made of these materials, a foamed material having open cells or closed cells, a non-woven fabric made of natural fiber or thermoplastic resin, and an opening is formed in these members. In addition, antioxidants, various pigments, ultraviolet absorbers, fillers, and the like may be added to these ventilation members in order to increase durability, strength, and the like.
The abrasive may be directly attached to the ventilation member, but may be indirectly attached via a synthetic sheet.

  As shown in the example of FIG. 6 or FIG. 7 to be described later, the ventilation member 4 is supported on the main surface of the base material 1 to constitute an abrasive support backup pad.

  In a preferred embodiment, the ventilation member is supported by the support structure so as to be substantially parallel to the main surface at a distance from the main surface. Then, a space is formed between the base material and the ventilation member, and the space communicates the opening structure of the ventilation member with the dust suction hole of the base material.

  As a result, the polishing dust generated by the polishing operation is sucked from the dust absorption hole of the abrasive material, and after passing through the opening structure, it can move freely toward any dust absorption hole of the base material. , The dust absorption efficiency is improved. A space (cavity pocket) that communicates the dust-absorbing hole of the base material with the opening structure and serves as a ventilation channel is referred to as a dust pocket in this specification.

  For example, the dust pocket allows at least two holes constituting the opening structure of the ventilation member to communicate with at least one dust suction hole of the base material. Preferably, the dust pocket communicates substantially all holes constituting the opening structure of the ventilation member with at least one dust suction hole of the base material. Here, substantially all holes refer to those in which air conduction is maintained in a state where the backup pad for supporting an abrasive is completed. That is, the purpose is to remove holes that are blocked by contact with a structural material or a binder for supporting the ventilation member.

  The dust pocket may be divided into a plurality of spaces. However, preferably, the dust pocket forms one space, and all the holes constituting the opening structure of the ventilation member are communicated with any one dust suction hole of the base material.

  FIG. 6 is a cross-sectional view of an abrasive support backup pad according to an embodiment of the present invention. This backup pad for supporting an abrasive material has a base material 1 and a ventilation member 4. The base material 1 has dust-absorbing holes 3, 3 ′,..., And the ventilation member 4 has an opening structure composed of holes 11, 11 ′,.

  FIG. 7 is a cross-sectional view of an abrasive support backup pad according to another embodiment of the present invention. This backup pad for supporting an abrasive has a base material 1 having an annular base integrally formed on the outer peripheral portion, a rigid sheet material 8 and a ventilation member 4 passed over the annular base. The base material 1 has dust-absorbing holes 3, 3 ′,..., And the ventilation member 4 and the rigid sheet material 8 have an opening structure composed of matching holes 11, 11 ′,. .

  The ventilation member 4 is supported by the annular base of the base material 1 and the rigid sheet material 8 so as to be substantially parallel to the main surface at a distance from the main surface. Adjacent to the main surface of the base material 1, a dust pocket 7 is formed for communicating the dust suction hole and the opening structure.

On the surface of the base material 1 or the rigid sheet material 8, ribs (not shown) may be formed in order to increase the rigidity. Further, in order to support the rigid sheet material 8 against the pressure during the polishing operation, a pier may be provided on the main surface of the base material 1. FIGS. 8A to 8E are plan views illustrating the shape and arrangement of piers. In each example, a plurality of bridge piers 81 are erected on the main surface 80 of the base material. 8A shows a straight wall radial shape, FIG. 8B shows a cylindrical circumferential shape, FIG. 8C shows a curved wall radial shape, FIG. 8D shows a prismatic circular shape, and FIG. 8E shows a curved pier circumferential pier arrangement. ing.
Furthermore, the dust absorption effect may be further enhanced by providing through holes 12, 12 ′,... On the side wall of the backup pad for supporting the abrasive.

  The pier may be formed of, for example, the same material as the base material, the rigid sheet material, or the ventilation member, or may be integrally formed with the base material or the rigid sheet material. The physical properties such as elasticity and strength of the pier may be adjusted as appropriate, and the pier may be formed of a rigid material such as metal.

  FIG. 9 is a cross-sectional view of an abrasive support backup pad according to another embodiment of the present invention. This backup pad for supporting an abrasive material includes a base material 1, an annular base 9, a rigid sheet material 8 and an air-permeable member 4 that are passed over the annular base 9. The base material 1 has dust-absorbing holes 3, 3 ′,..., And the ventilation member and the rigid sheet material have an opening structure composed of matching holes 11, 11 ′,.

  The ventilation member 4 is supported by the annular base 9 and the rigid sheet material 8 so as to be substantially parallel to the main surface at a distance from the main surface. Adjacent to the main surface of the base material 1, a dust pocket 7 is formed for communicating the dust suction hole and the opening structure.

  In the embodiment shown in FIGS. 7 and 9, the support structure includes a bridge pier and a bridge girder, the bridge pier is an annular platform 9, and the bridge girder is a rigid sheet material 8. The rigid sheet material 8 only needs to have a diameter dimension equal to or larger than the inner diameter dimension of the annular base. The thickness of the rigid sheet material 8 is determined so that the ventilation member 4 can be appropriately supported in consideration of the strength of the material.

  The annular table 9 may have any shape such as a cylindrical shape or a trapezoidal shape as long as the rigid sheet material 8 is held. The annular platform may be formed of the same material as the pier, for example. The physical properties such as elasticity and strength of the annular table may be adjusted as appropriate.

  The material of the rigid sheet material 8 is, for example, a thermoplastic resin: polyethylene, polypropylene, polystyrene, acrylonitrile / styrene resin, ABS resin, methacrylic resin, vinyl chloride, in addition to metals such as stainless steel, aluminum alloy, and magnesium alloy. Polyamide, polyacetal, ultra high molecular weight polyethylene, polyethylene terephthalate, polybutylene terephthalate, polymethylpentene, polycarbonate, modified polyphenylene ether, polyphenylene sulfide, polyether ether ketone, polytetrafluoroethylene, polyetherimide, polyarylate, polysulfone, polyether Thermosetting resins such as sulfone and polyamideimide: phenolic resin, urea resin, melamine resin, unsaturated polyester resin, resin Kid resin, epoxy resin, diallyl phthalate resin, etc. and synthetic resins such as fiber reinforced resin in which these resins are reinforced with long fibers such as glass fibers, carbon fibers, aramid fibers, metal fibers, short fibers, etc., or elastomer: polyurethane, One or more natural or synthetic rubber elastomers such as natural rubber, polybutadiene, polyisoprene, EPDM polymer, polyvinyl chloride (PVC), polychloroprene, nitrile rubber, silicone rubber, fluororubber or styrene / butadiene copolymer are used. In order to increase durability, strength, etc., antioxidants, various pigments, ultraviolet absorbers, fillers and the like may be added.

  The opening structure of the rigid sheet material 8 is not limited as long as it can appropriately support the ventilation member 4 and has an opening ratio that allows the polishing residue to pass through without any hindrance. For example, the shape of the hole may be a lattice shape with a side of 0.5 mm or more, a circular shape with a diameter of 0.5 mm or more, a rectangle, a diamond, a triangle, a quadrangle, a polygon, a star, a circle, an ellipse, or the like. . The opening structure may be a mesh structure.

  In the embodiment of FIG. 9 as well, as in the embodiment shown in FIG. 7, ribs, piers, through holes in the side walls, and the like may be further provided.

  FIG. 10 is a view showing an abrasive attachment surface and an A-A ′ cross section of an abrasive support backup pad according to an embodiment of the present invention. This abrasive material support backup pad has a base material 1 having a dust suction hole, a plurality of bridge piers 6, 6 ′ fixed on the main surface, and a ventilation member 4 supported by the pier. Yes. An annular wall 5 is provided on the outer periphery of the ventilation member 4. A dust pocket 7 is formed between the base material and the ventilation member to communicate the dust suction hole and the opening structure.

  FIG. 11 is a view showing an abrasive attachment surface and a B-B ′ cross section of an abrasive support backup pad according to another embodiment of the present invention. The backup pad for supporting the abrasive is fixed to the base material 1 having a dust absorbing hole, the annular base 9 fixed along the outer peripheral portion of the main surface, the rigid sheet material 8 passed over the annular base, and the rigid sheet material. The ventilation member 4 is provided. An annular wall 5 is provided on the outer periphery of the ventilation member 4.

  FIG. 12 is a view showing an abrasive mounting surface and a C-C ′ cross section of an abrasive support backup pad according to another embodiment of the present invention. In this embodiment, in the backup pad for supporting an abrasive shown in FIG. 11, the rigid sheet material 8 that is a bridge girder is supported by a plurality of columnar bases 10, 10 ',. Thereby, the strength with which the rigid sheet material 8 supports the ventilation member 4 is further improved. At this time, the rigid sheet material 8 made of metal or resin is set regardless of the dimensions of the annular table 9. Further, the annular base 9 may have any shape such as a cylindrical shape or a trapezoidal cross section. What is necessary is just to determine suitably the arrangement pattern, the number, material, etc. of a columnar base.

  The backup pad for supporting an abrasive of the present invention may further have an abrasive fixing member on the abrasive mounting surface. Examples of preferred abrasive fixing members include hook-and-loop fasteners and adhesive materials.

  The present invention will be specifically described by the following examples, but the present invention is not limited thereto.

  Prepare a sheet of glass epoxy resin (FRP) taper with a diameter of 125 mm and a thickness of 1 to 3 mm that is integrally molded with the sander mounting bolt. Six dust suction holes with a diameter of 10 mm around the sander mounting bolt A base material was obtained after emptying. The dust collection holes were arranged as shown in FIG.

  A neoprene rubber ring having an outer diameter of 125 mm, an inner diameter of 100 mm, a thickness of 5 mm and a hardness of Shore A10, and an artificial leather ring having an outer diameter of 125 mm, an inner diameter of 100 mm and a thickness of 1 mm were prepared. An artificial leather ring was bonded to the upper surface of the neoprene rubber ring using a rubber adhesive (“EC-847” manufactured by Sumitomo 3M) to obtain an annular wall.

  A vinyl chloride ventilation member having a corrugated mesh of the form shown in FIG. The thickness of the vinyl chloride sheet formed into a corrugated shape in the ventilation member is about 1.5 mm, the amplitude of the wave is about 5 mm, and the wavelength is about 7 mm. The thickness of the flat vinyl chloride sheet between the two waves is about 1 mm. The dimensions of the ventilation member are 100 mm in diameter and 5 mm in thickness.

  On the surface of the vinyl chloride ventilation member on the side in contact with the base material, a pier 6 or 6 'extended from the outer periphery toward the center using a urethane-based sealing material ("urethane body sealer" manufactured by Sumitomo 3M). 10 were formed as shown in Fig. 10. The dimensions of the wall-shaped table were 50 mm in length, 10 mm in width, and 1 mm in height.

  On the support surface of the base material, an annular wall was first adhered using a rubber-based adhesive, and then a ventilation member was adhered to the inside of the annular wall to obtain an abrasive support backup pad.

  An abrasive having six dust-absorbing holes (“DF2 Stick Kit Disc Roll Uni” (DF2 120C UNI) manufactured by Sumitomo 3M)) was attached to the abrasive attachment surface of the obtained backup pad for supporting an abrasive. The opening area of the ventilation member with respect to the entire area of the abrasive contact surface was about 23%. The abrasive mounting surface is mesh-like, and it is not necessary to align the hole position of the abrasive when mounting, and the mounting operation is easy.

  When this abrasive was mounted on a double action sander 3965 manufactured by Sumitomo 3M and the putty (“High Soft Super” manufactured by Sumitomo 3M) was polished for 30 seconds, both the polishing rate and the polishing amount were good.

  A neoprene rubber ring having an outer diameter of 125 mm, an inner diameter of 100 mm, a thickness of 3 mm, and a hardness of Shore A10 was prepared to obtain an annular table.

  Separately, a neoprene rubber ring having an outer diameter of 125 mm, an inner diameter of 100 mm, a thickness of 3 mm, and a hardness of Shore A10, and an artificial leather ring having an outer diameter of 125 mm, an inner diameter of 100 mm, and a thickness of 1 mm were prepared. An artificial leather ring was bonded to the upper surface of the neoprene rubber ring using a rubber adhesive (“EC-847” manufactured by Sumitomo 3M) to obtain an annular wall.

  A ventilation member made of nitrile butadiene rubber (NBR) having a square mesh of the form shown in FIG. The length of one side of the square mesh is about 10 mm, and the thickness of the NBR sheet is about 1.5 mm. The dimensions of the ventilation member are 100 mm in diameter and 3 mm in thickness.

  A stainless steel ventilation member having a diameter of 125 mm and a thickness of 1 mm having a square grid with a side of 10 mm was prepared. On the surface of the NBR ventilation member on the side in contact with the base material, this stainless steel ventilation member is used with a rubber adhesive (“EC-847” manufactured by Sumitomo 3M) so that the assembly hole is not blocked. A mesh laminate was obtained by bonding to the coaxial position.

  On the support surface of the same base material used in Example 1, using a two-pack epoxy resin adhesive (“8106” manufactured by Sumitomo 3M), an annular base was adhered, and then on the annular base, The mesh laminate was bonded using a rubber adhesive (“EC-847” manufactured by Sumitomo 3M).

  Then, an annular wall is bonded onto the outer periphery of the stainless steel ventilation member exposed around the mesh laminate using a rubber adhesive (“EC-847” manufactured by Sumitomo 3M Co.) to support the abrasive. Got a backup pad.

  An abrasive having six dust-absorbing holes (“DF2 Stick Kit Disc Roll Uni” (DF2 120C UNI) manufactured by Sumitomo 3M)) was attached to the abrasive attachment surface of the obtained backup pad for supporting an abrasive. The opening area of the ventilation member with respect to the entire area of the abrasive contact surface was about 36% or more. The abrasive mounting surface is mesh-like, and it is not necessary to align the hole position of the abrasive when mounting, and the mounting operation is easy.

  When this abrasive was mounted on a double action sander 3965 manufactured by Sumitomo 3M and the putty (“High Soft Super” manufactured by Sumitomo 3M) was polished for 30 seconds, both the polishing rate and the polishing amount were good.

  Six stainless steel columns having a diameter of 6 mm and a height of 3 mm were prepared. Using a two-pack epoxy resin adhesive (“8106” manufactured by Sumitomo 3M Ltd.) on the main surface of the same base material used in Example 1, these stainless steel columns are circularly shaped as shown in FIG. Bonded at regular intervals on the circumference.

  A backup pad for supporting an abrasive was obtained in the same manner as in Example 2 except that this base material to which a stainless steel column was bonded was used.

  An abrasive having six dust-absorbing holes (“DF2 Stick Kit Disc Roll Uni” (DF2 120C UNI) manufactured by Sumitomo 3M)) was attached to the abrasive attachment surface of the obtained backup pad for supporting an abrasive. The abrasive mounting surface is mesh-like, and it is not necessary to align the hole position of the abrasive when mounting, and the mounting operation is easy.

  When this abrasive was mounted on a double action sander 3965 manufactured by Sumitomo 3M and the putty (“High Soft Super” manufactured by Sumitomo 3M) was polished for 30 seconds, both the polishing rate and the polishing amount were good.

  FIG. 13 is a view showing an abrasive mounting surface and a D-D ′ cross section of the backup pad for supporting an abrasive obtained in this example. First, six stainless steel pillars 10 having a diameter of 6 mm and a height of 3 mm were prepared. On the main surface of the same base material 1 as that used in Example 1, a two-pack epoxy resin adhesive (manufactured by Sumitomo 3M Sakai "8106" )), These stainless steel columns were bonded at equal intervals on the circumference as shown in FIG.

  A rigid sheet material 8 having the following opening structure formed in a glass fiber reinforced ABS resin having an outer diameter of 110 mm and a thickness of 2 mm, and an annular wall 9 made of glass fiber reinforced ABS resin having an outer diameter of 105 mm and a thickness of 2 mm are prepared. 1 was bonded using a two-pack epoxy resin adhesive (“8106” manufactured by Sumitomo 3M Limited).

  Around the annular wall 9 and the rigid sheet material 8, neoprene rubbers 12 and 13 having a hardness Shore A10 were attached so as to have a diameter of 125 mm.

  A neoprene rubber sheet 14 having an outer diameter of 125 mm, a thickness of 5 mm, and a hardness of Shore A10, and a hook-and-loop fastener 11 (hook member) having an outer diameter of 125 mm were prepared. By using a rubber adhesive (“EC-847” manufactured by Sumitomo 3M Limited) on the upper surface of the neoprene rubber sheet 14, the surface fastener 11 (hook member) was bonded to obtain the ventilation member 15. The ventilation member 15 has the following opening structure. The ventilation member 15 was bonded to the rigid sheet material 8 and the neoprene rubber 13 on the outer periphery of the annular wall using a rubber adhesive (“EC-847” manufactured by Sumitomo 3M) to obtain a dust-absorbing backup pad.

  Opening structure: A regular hexagon inscribed in a circle having a diameter of 4.5 mm is arranged as shown in FIG. 13 within a circumference of 100 mm in diameter from the center to form an opening structure.

An abrasive having six dust-absorbing holes (“DF2 One-touch Uni (O / DF2120UNI)” manufactured by Sumitomo 3M Co., Ltd.) was attached to the abrasive-attaching surface of the obtained dust-absorbing backup pad. The ratio of the opening area of the abrasive mounting sheet material to the total area of the abrasive contact surface was about 30%.
The abrasive mounting surface has an opening structure in which regular hexagons are arranged, and it is not necessary to align the hole positions when mounting, and the mounting work is easy.

  When this abrasive was attached to a double action sander 3965 manufactured by Sumitomo 3M Co., Ltd. and a putty (“High Soft Super” manufactured by Sumitomo 3M Co., Ltd.) was polished for 30 seconds, both the polishing rate and the polishing amount were good.

Reference Example The same base material as in Example 1 was prepared. Artificial leather 125mm in diameter and 1mm in thickness is bonded to a neoprene rubber with a diameter of 125mm, a thickness of 5mm and a hardness of Shore A10 with a rubber adhesive ("EC847" manufactured by Sumitomo 3M), and then absorbs dust at the same position as the base material. Holes were provided and adhered to the base material with a rubber adhesive (“EC847” manufactured by Sumitomo 3M) so that the dust-absorbing holes of the base material were not blocked.

An abrasive having six dust-absorbing holes (“DF2 Stick Kit Disc Roll Uni” (DF2 120C UNI) manufactured by Sumitomo 3M Limited) was attached to the abrasive attachment surface of the obtained abrasive backup pad. The ratio of the opening area of the dust suction hole to the total area of the abrasive contact surface was about 4% or less.
When mounting, it was necessary to align the hole position of the abrasive material with the dust absorption hole position of the backup pad.

It is a figure which shows an example of the sander attachment surface and side surface of a base material. It is a figure which shows an example of the abrasives attachment surface and side surface of a ventilation member. It is a figure which shows the other example of the abrasives attachment surface and side surface of a ventilation member. It is a top view which shows the example of the opening structure of a ventilation member. It is a top view which shows the example of the opening structure of a ventilation member. It is sectional drawing of the backup pad for abrasive | polishing material which is one embodiment of this invention. It is sectional drawing of the backup pad for abrasive | polishing material which is the other embodiment of this invention. It is the top view which illustrated the shape and arrangement of a pier. It is sectional drawing of the backup pad for abrasive | polishing material which is the other embodiment of this invention. It is a figure which shows the abrasives attachment surface and A-A 'cross section of the backup pad for abrasives support which is another embodiment of this invention. It is a figure which shows the abrasives attachment surface and B-B 'cross section of the backup pad for abrasives support which is another embodiment of this invention. It is a figure which shows the abrasives attachment surface and C-C 'cross section of the backup pad for abrasives support which is another embodiment of this invention. It is a figure which shows the abrasives attachment surface and D-D 'cross section of the backup pad for abrasives support which is another embodiment of this invention.

Explanation of symbols

1 ... Base material,
2 ... Thunder mounting bolt,
3, 3 '... Dust absorbing hole,
4, 15 ... ventilation member,
5 ... Annular wall,
6, 6 '... pier,
7 ... Dust pocket,
8: Rigid sheet material,
9 ... Annular stand,
10, 10 '... Columnar base.

Claims (13)

A base material having a second main surface facing the first main surface, and having at least one dust-absorbing hole penetrating the first main surface and the second main surface;
An attachment surface which is bonded to the first main surface of the base material and attaches an abrasive; and a ventilation member having a plurality of holes extending from the attachment surface toward the first main surface of the base material;
The ventilation member cooperates with the base material to cause dust to flow out from the mounting surface to the second main surface of the base material.
Backup pad for supporting abrasives.   The abrasive support backup pad according to claim 1, wherein the ventilation member has a plurality of separated ventilation holes defined by a plurality of ventilation walls.   2. The backup pad for supporting an abrasive according to claim 1, wherein the total opening area of the mounting surface of the ventilation member is 15% or more with respect to the total area of the abrasive contact surface.   The backup pad for supporting an abrasive according to claim 1, wherein a hollow pocket is provided between the ventilation member and the base material.   2. The backup pad for supporting an abrasive material according to claim 1, wherein the base material has an annular base around an outer peripheral portion of the first main surface.   The backup pad for supporting an abrasive according to claim 5, further comprising a rigid sheet provided on the annular stage and supporting the ventilation member.   The abrasive pad backup pad according to claim 6, wherein the annular platform has at least one pier that supports the rigid sheet.   The backup pad for supporting an abrasive according to claim 2, wherein the ventilation member has at least 15 separated ventilation holes.   The backup pad for supporting an abrasive according to claim 8, wherein the separated ventilation holes are arranged substantially uniformly in the same plane.   The abrasive support backup according to claim 1, wherein the ventilation member is formed of one or more materials selected from a thermoplastic resin, a thermosetting resin, an elastomer, a natural fiber, or a foamed material thereof. pad.   The backup pad for supporting an abrasive according to claim 1, wherein the ventilation member has a mesh-shaped ventilation hole. The backup pad for supporting an abrasive according to claim 1, wherein the mounting surface has a hook or a loop corresponding to a surface fastener on the abrasive so as to detachably install the abrasive. 2. The backup pad for abrasive support according to claim 1, wherein the attachment surface has a smooth surface attached to an adhesive layer on the abrasive to detachably install the abrasive.

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