JP3029241B2 - Abrasive sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding structure of various abrasive cloths, and more particularly to an easy and reliable bonding of an abrasive sheet provided with a paper base material having fine abrasive grains. The present invention relates to an inexpensive provision of an abrasive belt provided with fine abrasive grains.

[0002]

2. Description of the Related Art Abrasive belts are applied with an abrasive such as fused alumina, silicon carbide, garnet or the like to a cloth substrate using an adhesive in order to cope with various sanding processes. What is attached and adhered is used.

[0003] In the case of forming an abrasive belt by joining an abrasive sheet using a cloth as a base material, a so-called cloth file, endlessly, abrasive grains on one joint surface of the cloth file are removed with a diamond grindstone. In addition to creating a bonding margin, the bonding margin from which the abrasive grains have been removed and the bonding margin on the back side (the side without abrasive grains) at the other cloth file end to be joined to the bonding margin In addition, a plowing process is performed to reduce the thickness at the bonding margin, and an adhesive is applied to the bonding margin, and is fixed and dried in a pressed state using a hot press.

[0004]

However, in such a method for joining a cloth file, it is difficult to process the joining surface of the cloth file and it requires a lot of work, so that the production of the polishing sheet is expensive. Nevertheless, there has been a problem that the thickness of the cloth at the joint portion cannot always be adjusted uniformly.

[0005] Further, since the base material of the polishing sheet that can be produced by inserting the bonding end portion is a cloth, the abrasive grains provided on the cloth surface as the base material depend on the roughness of the cloth fibers as the base material. Due to restrictions, it was difficult to produce an abrasive sheet using fine abrasive grains.

The present invention has been proposed to solve the disadvantages of the conventional polishing sheet, and it is easy to manufacture and process the polishing sheet with uniform characteristics. Bonding and production of abrasive sheets with various abrasive grains at low cost,
An object of the present invention is to provide an abrasive belt having uniform characteristics at a low production cost.

[0007]

In order to achieve the above object, an abrasive sheet according to the present invention comprises an abrasive sheet according to claim 1 and a paper substrate provided with an abrasive 3 on one surface. 1, at least a raised portion 2b is made of a thermoplastic resin material, and at least a raised portion 2b is formed.
The polishing sheet A is formed by attaching the cloth base material 2 so that the b portion is provided on the outside, and the other end of the polishing sheet A is attached to one end of the polishing sheet A so that the raised surface 2b of the polishing sheet A is continuous. Abutting or abutting the side ends of the polishing sheets A, A such that the respective brushed surfaces 2b, 2b sides of the separately prepared abrasive sheets A, A are continuous, and each of the abutting ends a, a The polishing sheet A has a configuration in which a tape B made of a thermoplastic resin material or a tape B containing a thermoplastic resin material is attached and welded so as to extend over each raised surface 2b.

[0008] Next, the polishing sheet according to the second aspect of the present invention is the polishing sheet according to the first aspect of the present invention, wherein the opposing side ends of the polishing sheet A have a raised surface 2b on the polishing sheet A. The tape B is attached and welded over the two raised surfaces of the respective side edges of the polishing sheets A, A at the butting ends a, a. It is configured as an abrasive belt.

The polishing sheet according to the third aspect of the present invention is the polishing sheet according to the first aspect of the present invention, wherein the raised material 2b provided on the cloth substrate 2 has a hooking function. .

Next, the polishing sheet according to the fourth aspect of the present invention is the polishing sheet according to the first aspect of the present invention,
The tape B used for joining the end of the polishing sheet A is configured as a mesh woven fabric.

Further, the polishing sheet according to the fifth aspect of the present invention is the polishing sheet according to the first aspect of the present invention, wherein the thickness of the tape B attached to and attached to the side end of the polishing sheet A is set. The height dimension is set to be smaller than the dimension of the raised brush 2b in the polishing sheet A.

Still further, the polishing sheet according to the invention of claim 6 is the polishing sheet according to the invention of claim 1,
The welding is performed as ultrasonic welding.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail.

FIGS. 1 to 4 show an abrasive sheet according to a typical embodiment and a typical configuration example of the abrasive sheet. FIG. 1 shows an abrasive sheet cut for an abrasive belt. FIG. 2 shows a state in which the cut abrasive sheet is joined with a tape B in a plan view and a perspective view in FIG. 3 and 4, the polishing sheets A,
FIG. 3 shows the state before A is joined by using the tape B, and FIG. 4 shows the joined state as an enlarged cross section of a main part.

First, a typical abrasive sheet according to the present embodiment has a structure in which at least a raised portion 2b is made of a thermoplastic resin material with respect to the other surface of the paper substrate 1 provided with the abrasive material 3 on one surface. And a polishing sheet A having a cloth substrate 2 adhered so as to be provided with at least a raised portion 2b on the outside, and the polishing sheet A is attached to one end of the polishing sheet A so that the raised surface 2b of the polishing sheet A is continuous. Abrasive sheet A
Or the other ends of the polishing sheets A, A are respectively prepared so that the side faces of the brushed sheets 2b, 2b of the separately prepared polishing sheets A, A are connected to each other. , A, a tape B made of a thermoplastic resin material or a tape B containing a thermoplastic resin material is attached and welded so as to extend over each raised surface 2b of each polishing sheet A.

With such a configuration, the polishing sheet A
Both ends, or the respective joining ends of the abrasive sheets A, A can be easily and reliably joined by the tape B in a butt state, and the tape B used for this joining is
The raised material 2b on the cloth base material 2 is welded so as to be crushed and crushed. In particular, since the paper base material 1 of the abrasive sheet A is joined in abutting state, there is no step on the formed sanding surface, and the configuration of the abrasive sheet provided with a grindstone having a fine particle size is improved. It is possible.

Next, in the polishing sheet having the above-mentioned structure, the opposite side ends of the polishing sheet A are endlessly butted with the brushed surface 2b of the polishing sheet A inside. Another typical example is that the polishing sheet is formed as a polishing belt in which a tape B is attached and welded so as to extend over the brushed surface 2b at each side end of the polishing sheets A at the butt ends a. This is one of the preferred embodiments.

With this configuration, the raised brush 2b
An abrasive belt provided with an inner surface and an abrasive material 3 on the outer surface side with the paper substrate 1 as an attachment surface can be easily, reliably, and without any difference in the abrasive surface at each joint. Can be provided in a state.

Further, in the polishing sheet having the above-mentioned configuration, the raised sheet 2b provided on the cloth substrate 2 is provided with a hooking function. And

[0020] With this configuration, the polishing sheet A provided in each polishing apparatus can be securely fixed to the pad surface of the polishing apparatus in a close contact state.

Next, in the polishing sheet having the above structure, the tape B used for joining the ends of the polishing sheet A is
The configuration made of a mesh woven fabric is one of the other typical embodiments.

With this configuration, a part of the raised portion 2b of the cloth base material 2 enters the space formed by the mesh of the tape B or melts out so as to escape from the space, thereby ensuring the mutual contact between the abrasive sheets. It functions so as to avoid excessive fastening and bulkiness of the overlapping dimension on the joining surface of the tape B.

Further, in the polishing sheet having the above-mentioned structure, the thickness of the tape B attached to and welded to the side end portion of the polishing sheet A is set to the raised brush 2b in the polishing sheet A.
The configuration is smaller than the size.

With this configuration, when the polishing sheet A is used, the joining portion of the polishing sheet A
It is possible to provide a substantially uniform polished surface in use, without protruding in a stepped manner on the polished surface side.

Further, in the polishing sheet having the above-described structure, the welding is performed by ultrasonic welding, which is still another typical embodiment.

With this configuration, when joining the abrasive sheets, problems such as deterioration of the quality of the abrasive sheets due to heating do not occur.

The polishing sheet A constructed here comprises a knitted or woven cloth main body 2a and a cloth substrate 2 having at least one surface provided with a raised 2b, and a cloth substrate 2 and, in particular, raised 2b on the cloth substrate 2. So that one side is protruded from one side.
And a paper substrate 1 provided with abrasives 3... 3 on the other side.

The paper substrate 1 used here is prepared as a material having characteristics corresponding to the abrasive sheet to be constituted, particularly the use of the abrasive sheet, the type, shape, particle size, etc. of the abrasive used. An abrasive material 3 such as fused alumina, silicon carbide, garnet or the like is fixed on one side by an adhesive 4 in an attached state. Therefore, the paper base material 1 used here is not limited to a so-called cellulose paper, but may be any paper material such as a cellulose paper reinforced by a synthetic resin material, a composite paper made of a plurality of materials, and a synthetic paper made of a synthetic resin. It may be configured.

Next, the other surface of the paper substrate 1
That is, the cloth base material 2 to be attached and welded to the side where the polishing material 3 is not provided is a knit having characteristics corresponding to the use of the polishing sheet A to be constituted, one surface of the woven cloth main body 2a, or It is prepared as one provided with brushed 2b on both sides.

Here, the raising 2b provided on the cloth substrate 2 is
At the time of knitting and weaving the cloth body 2a, it is knitted or woven out on one side or both sides in a loop shape, and this is left in a loop shape or in a state where the loop shape is cut, or
The knitted or woven cloth main body 2a is constructed by inserting or weaving a brushed yarn into one or both sides in a loop-like or straight-like manner into a knitted or woven cloth body.

Further, here, the raised brush 2 formed on the cloth base material 2 is used.
b is formed in a loop shape or a shape in which the top portion of the loop shape is cut open, and is preferably configured to function as a female means in the planar fastener.

The cloth substrate 2 thus configured has one surface side integrally fixed to the paper substrate 1 via an adhesive, and has one side bonded to the paper substrate 1. The raised side 2b is provided in a protruding state on the opposite side.

The cloth base material 2 is knitted using a thermoplastic resin fiber, woven fabric, or knitted containing a thermoplastic resin fiber,
A typical example is a woven fabric or a knitted or woven fabric in which all or at least a part of the raised brush 2b is made of a thermoplastic resin fiber.

Further, the raising 2 provided on the cloth substrate 2
b is configured such that the protrusion dimension thereof is larger than the thickness dimension of the tape B, and when the tape B is bonded to the cloth base material 2, the surface of the adhesive tape B is It is preferable to adopt a configuration in which the surface of the adhesive tape B does not protrude from the tip of the raised brush 2b, ie, flush with or inward from the tip of each raised brush 2b.

Adhesion of the polishing sheet A having such a structure,
Tape B used for bonding is knitted with thermoplastic resin, woven cloth, knitted including thermoplastic resin fiber, woven cloth, plastic sheet made of thermoplastic resin material, film, knitted with thermoplastic resin monofilament, A woven mesh or a knitted or woven mesh containing a thermoplastic resin monofilament can be used.

In bonding the polishing sheet A, first, the polishing sheet A prepared as described above is cut into a shape suitable for a polishing apparatus to be bonded, in this case, a tape shape. At the same time, in the production of the polishing belt, both ends in the longitudinal direction are cut and cut in one V-shape over the width direction, and the other is cut into the concave notch. It is cut into a convex V-shape that fits well, and is configured as butt ends a, a that are closely adhered to each other and joined.

The polishing sheet A thus prepared is bent endlessly, that is, in an annular shape so that the raised surface 2b faces inside, and the butted ends a, a
Match with the close contact. In joining the respective joining end portions of the polishing sheet A, the respective side ends are brought into close contact with each other from the side without overlapping the polishing sheets A with each other.

Thus, each side end, especially the butting end a,
a in a state of abutting, and this butt end a,
a so as to completely cover the polishing sheet A, the tape B is applied so as to cover both the surfaces of the raised brushes 2b on the respective joining side surfaces of the polishing sheet A, and the tape B is ultrasonically processed to form the cloth base. Weld to material 2.

In this welding process, the tape B used for welding the abrasive sheet A is cut so as to match the width of the abrasive sheet A so as to join the abrasive sheet A. In addition, an abrasive belt can be formed.

Here, the polishing sheet A using the tape B
In the joining of, other than the welding by the ultrasonic processing,
For example, it may be performed by a method such as hot welding such as hot welding. In addition, the tape B used for joining the polishing sheet A, prior to joining the polishing sheet A,
Cutting may be prepared so as to match the width dimension of the polishing sheet A.

By forming the joining end of the abrasive sheet A as the butted ends a, a of the above-described configuration, the abrasive sheet A can be aligned in series with the center line, that is, accurately, without any lateral displacement. Can be bonded and bonded as a band-like material. For example, it is configured as a butt end orthogonal to the length direction of the polishing sheet A or a butt end inclined in the length direction of the polishing sheet A. There may be.

In the illustrated example, a so-called loop-shaped joining structure is shown in which both ends of one polishing sheet A are joined ends to be joined to each other. , A, and the respective polishing sheets A may be configured to form a continuous polishing sheet A by bringing the joining ends into abutting state with each other.

[0043]

The abrasive sheet according to the present invention has a characteristic configuration as described above, in particular, at least a raised portion 2b is formed on the other side of the paper substrate 1 provided with the abrasive 3 on one side. The abrasive sheet A is made of a thermoplastic resin, and is provided with at least the raised portion 2b on the outside and the cloth base material 2 bonded thereto.
The other end of the polishing sheet A is abutted against one end of the polishing sheet A so that the surfaces of the raised brushes 2b are continuous, or the respective raised brushes 2b in each of the separately prepared polishing sheets A, A
Attaching the side ends of the abrasive sheets A, A so that the 2b surface side is continuous, and a tape B made of a thermoplastic resin so as to extend over each raised surface 2b of each abrasive sheet A at the abutting ends a, a, or Since the tape B containing a thermoplastic resin is attached and welded,
Both ends of the abrasive sheet A or the respective joining ends of the abrasive sheets A and A can be easily and reliably joined by the tape B in a butt state, and the tape B used for this joining is made of a cloth base material. 2 is characterized in that the raised portion 2b is crushed and welded. Further, since the paper base material 1 of the polishing sheet A is joined in abutting state, no step is formed on the sanding surface, and the polishing sheet is provided with abrasive grains having a fine particle diameter. Is made possible.

Next, in the polishing sheet having the above structure, the opposite side ends of the polishing sheet A are endlessly butted with the raised surface 2b of the polishing sheet A inside. Since the tape B is attached and welded so as to extend over the brushed surface 2b at the side end of each of the abrasive sheets A, A at the butting ends a, a, the brushed belt 2b is formed. An abrasive belt provided with an inner surface and an abrasive material 3 on the outer surface side with the paper substrate 1 as an attachment surface can be easily, reliably, and without any difference in the abrasive surface at each joint. It has features that can be provided in a state.

Further, in the polishing sheet having the above-described configuration, the raised sheet 2b provided on the cloth base material 2 is provided with a hooking function, so that the polishing sheet provided for each polishing apparatus is It has the feature that it can be securely fixed to the pad surface of the device in a close contact state.

Next, in the polishing sheet having the above structure, a tape B used for joining the end of the polishing sheet A is used.
Is made of a mesh-shaped woven cloth, so that a part of the raised 2b in the cloth base material 2
Into the space constituted by the mesh in, or melted out so as to escape from it, and welded to ensure that the abrasive sheets are securely fastened to each other, and the feature that functions to avoid the bulk of the overlapping dimension at the joining surface of the tape B. Have.

Further, in the polishing sheet having the above-described structure, the thickness of the tape B attached to and attached to the side end of the polishing sheet A is set to the raised brush 2b in the polishing sheet A.
Abrasive sheet A
When the polishing sheet A is used, the joining portion of the polishing sheet A does not protrude in a stepped manner on the polishing surface side.
It has the feature that it can be configured to form a substantially uniform polished surface.

Further, in the polishing sheet having the above-mentioned structure, the welding is performed by ultrasonic welding, so that there is no problem such as quality deterioration of the polishing sheet due to heating when joining the polishing sheet. Have.

[Brief description of the drawings]

FIG. 1 is a plan view showing a typical abrasive sheet A prepared for bonding.

FIG. 2 is a perspective view showing one of the joined states.

FIG. 3 is a cross-sectional view of a main part showing one of the joined states.

FIG. 4 is a sectional view of a principal part of the bonded abrasive sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper base material 2 Cloth base material 2a Brushed 3 Abrasive material 4 Adhesive A Abrasive sheet B Tape a Butt end

Continuation of the front page (56) References JP-A-52-1588 (JP, A) JP-A-51-36692 (JP, A) JP-A-53-112935 (JP, A) , U) Fully open 1979-151189 (JP, U) Fully open 1979-3564 (JP, U) Fully open, 64-25547 (JP, U) Japanese Patent Publication 46-23117 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B24D 11/06

Claims (6)

(57) [Claims] 1. A cloth in which at least a raised portion is made of a thermoplastic resin material and at least a raised portion is provided on the outside with respect to the other surface of the paper substrate provided with an abrasive on one surface. A polishing sheet having a base material adhered thereto, butting the other end of the polishing sheet to one end of the polishing sheet so that the brushed surface of the polishing sheet is continuous, or each of the separately prepared polishing sheets A tape made of a thermoplastic resin material or a thermoplastic resin material is provided so that the side edges of the polishing sheet are abutted so that the brushed surface side is continuous, and the respective brushed surfaces of the respective polishing sheets at the abutted ends are laid. An abrasive sheet characterized by being attached and welded with a tape. 2. Opposite side edges of the abrasive sheet are endlessly butted with the raised surface of the abrasive sheet inside, and respective side edges of the abrasive sheet at the abutting end. The polishing sheet according to claim 1, wherein the polishing sheet is a polishing belt to which a tape is attached and welded so as to cover the raised surface of the portion. 3. The polishing sheet according to claim 1, wherein the raised material provided on the cloth substrate has a hooking function. 4. The polishing sheet according to claim 1, wherein the tape used for joining the ends of the polishing sheet is made of a mesh woven cloth. 5. The polishing sheet according to claim 1, wherein the thickness dimension of the tape attached to and welded to the side end of the polishing sheet is smaller than the brushed dimension of the polishing sheet. 6. The polishing sheet according to claim 1, wherein the welding is an ultrasonic welding.