JPS626952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a coated abrasive paper. The main object of the present invention is to reduce manufacturing costs by eliminating waste of abrasive grains bonded to a base material. Another object of the present invention is to provide a coated abrasive paper that is highly efficient in removing grinding debris.

Conventional coated abrasive paper is produced by uniformly applying adhesive B on the surface of a rolled base material A with a roller, and then scattering abrasive grains C onto the adhesive B, as shown in Figure 1. A band-shaped abrasive cloth material D was prepared by cutting the material into a predetermined shape.

The abrasive cloth E used by being attached to a rotary abrasive tool is mainly circular in shape, and when the abrasive cloth E in a desired shape (for example, circular shape) is cut from the band-shaped abrasive cloth material D, , resulting in parts to be discarded on the outside F and inside G of the abrasive cloth paper, and the parts F,
Since the G abrasive grains cannot be reused, there was a lot of wasted abrasive grains. In particular, diamond abrasive grains, cubic boron nitride abrasive grains, and the like are extremely expensive, and the more parts are discarded without being used, the higher the manufacturing cost of coated abrasive paper becomes.

Furthermore, when observing the abrasive grain layer of the abrasive coated paper E produced by the conventional method under magnification, each abrasive grain C is randomly glued together as shown in Fig. 2, and this abrasive coated paper E
In grinding using grinding, grinding debris gets stuck between the abrasive grains and cannot be discharged, so heavy grinding may generate heat and cause grinding burn.

Furthermore, in the conventional method, adhesive is uniformly applied to the surface of the base material using a roller, and abrasive grains are sprinkled on top of the adhesive, so abrasive grain layers with different grain sizes or layers of different materials are adjacent to each other. It was extremely difficult to produce coated abrasive paper formed in a striped pattern.

In this invention, an adhesive layer corresponding to the shape of the coated abrasive paper is formed by screen printing on the surface of the base material, abrasive grains are sprinkled on the adhesive layer to form an abrasive layer, and then the coated abrasive paper is coated. There is a method in which the abrasive layer is cut according to the shape of the coated abrasive paper, and an abrasive layer corresponding to the shape of the coated abrasive paper is screen printed on the surface of the base material using an adhesive mixed with abrasive grains, and then the coated abrasive paper is cut. This method involves cutting the abrasive layer portion to correspond to the shape of the abrasive layer.

Embodiments of the present invention will be described below based on the drawings.

Example 1 In this example, an adhesive is screen printed on the surface of a substrate, and abrasive grains are sprinkled onto the adhesive before it dries. As shown in Fig. 3, a base material 1 made of woven fabric, kraft paper, etc. is wound up into a roll, one end of the base material 1 is pulled out from the roll, and if necessary, a sheet of a predetermined size is prepared. An adhesive such as glue or synthetic resin is used as ink so that an adhesive layer 2 is formed on the surface of the base material 1 in a shape corresponding to the shape of the final product, the abrasive cloth paper 4. screen print. Before the adhesive dries, abrasive grains 3 of a predetermined material and particle size are sprinkled from above the adhesive layer 2 to form an abrasive grain layer 6, and then the adhesive is dried. The scattered abrasive grains 3 are adhered to the base material 1 only at the adhesive layer 2, and are not adhered to the parts where the adhesive layer 2 is not formed. Therefore, the abrasive grains 3 directly sprinkled onto the base material 1 on which the adhesive layer 2 is not formed are recovered and used again. After the adhesive has dried, size coat adhesive is applied from above the abrasive grain layer 6 if necessary, and after the adhesive is sufficiently cured,
Cut the abrasive cloth paper 4 along its outline.

When the abrasive coated paper 4 produced by the above method is observed under magnification, it can be seen that there are two types of shapes of the adhesive layer 2. One is when the viscosity of the adhesive is high, and the adhesive layer 2 is formed in a substantially rectangular shape within the mesh of the screen. (4th
Figure) The other type is when the viscosity of the adhesive is relatively low, and the adhesive layer penetrates not only into the mesh of the screen but also under the wires that make up the screen, covering almost the entire surface. It is formed to have a uniform thickness (not shown). In the former case, the adhesive layer 2 is not formed in the wire portion of the screen, and a large number of adhesive layers 2 having a substantially rectangular shape are formed with minute gaps corresponding to the thickness of the wire. becomes. When the abrasive grains 3 are sprinkled onto the adhesive layer 2, the abrasive grains 3 are attached and fixed to the adhesive layer 2 as shown in FIG. It becomes 6. When grinding is performed using this coated abrasive paper, the grinding debris generated by the grinding escapes into the minute grooves 5 between the abrasive grain layers 6 and is discharged from the grooves 5, thereby preventing clogging of the abrasive grain layer 6. . In the latter case, where the viscosity of the adhesive is relatively low, the adhesive layer 2 is formed to have a substantially uniform thickness on the surface of the base material 1, so the grooves 5 described above are not formed. However, even in this case, it is possible to form the abrasive grain layer 19 in a striped pattern like the abrasive cloth paper 17 shown in FIG. 8 by arbitrarily selecting the screen printing pattern. In the figure, 18 is a groove for discharging grinding debris, and no abrasive grain layer 19 is formed thereon.

Example 2 This example is a further development of the previous example, in which a paste is made by mixing abrasive grains into an adhesive, and the paste is screen printed on the surface of a base material. Abrasive grains are mixed with the same adhesive as in Example 1 and thoroughly stirred to form a paste. By using this paste as ink and screen printing in a shape corresponding to the shape of the abrasive coated paper, an abrasive layer 16 consisting of an adhesive layer 12 and abrasive grains 13 is formed, and the adhesive is sufficiently dried and cured. After that, the abrasive cloth paper 14 is cut along the outline.
(FIG. 6) When the coated abrasive paper 14 manufactured by the above method is observed under magnification, it can be seen that there are two types of shapes of the abrasive grain layer 16 as in the first embodiment.
One of them is when the viscosity of the adhesive is high, and the abrasive grain layer 16 is formed in a substantially rectangular shape within the mesh of the screen (FIG. 7). In this case, the larger the particle size of the abrasive grains, the higher the tendency. The other one is when the viscosity of the adhesive is relatively low, and the abrasive layer 1
6 is formed not only into the mesh of the screen but also under the wires constituting the screen to have a uniform thickness over almost the entire surface. In this case, the smaller the grain size of the abrasive grains, the higher the tendency. In the former case, the abrasive grain layer 1 is
6 is not formed, and a large number of substantially rectangular abrasive grain layers 16 are formed with minute gaps corresponding to the thickness of the strands maintained. When grinding is performed using this abrasive cloth paper, the grinding debris generated by the grinding is removed from the abrasive grain layer 16.
The abrasive grains escape into the fine grooves 15 between them and are discharged from the grooves 15 to prevent clogging of the abrasive grain layer 16. In the latter case, where the viscosity of the adhesive is relatively low, the abrasive layer 16 is attached to the base material 11.
Since the grooves 15 are formed almost uniformly on the surface of the grooves 15, the former grooves 15 are not formed. However, even in this case, it is possible to form the grooves 18 in the abrasive grain layer 19 as shown in FIG. 8 as explained in the first embodiment.

In this Example 2, the following production of the coated abrasive paper is particularly easy.

In the abrasive cloth belt 21 as shown in FIG.
3 and 24 in a striped pattern, or the abrasive grain layers 22, 23, and 24 made of different materials are formed in a striped pattern.

Abrasive paper disk 25 as shown in FIG.
In this step, abrasive grain layers 26, 27, and 28 having different grain sizes or materials are formed in an annular shape.

The mesh of the screen used in the above embodiment is in the range of about 60 to 400 meshes, but is not limited to this range.

Since the present invention has the above configuration, it has the following advantages.

(1) Since the abrasive grains are bonded only to the part that will be used as the coated abrasive paper, the amount of abrasive grains used is significantly reduced compared to the conventional method. In coated abrasive paper using expensive abrasive grains, the effect of saving abrasive grains is significant and helps reduce manufacturing costs.

(2) If an adhesive with relatively high viscosity is used, an approximately rectangular abrasive grain layer corresponding to the mesh of the screen will be formed, and the fine grooves between the abrasive grain layers will help discharge the grinding debris. Grinding burn caused by clogging of grinding debris is eliminated.

(3) When using a screen printing method using an adhesive mixed with abrasive grains, it is extremely easy to form adjacent abrasive grain layers with different grain sizes or different materials in a striped pattern. Since it is carried out, it is possible to reduce the amount of expensive abrasive grains used, and by using it in combination with cheap abrasive grains, it is possible to exhibit the same grinding ability as abrasive coated paper using only expensive abrasive grains.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the manufacturing process using the conventional method, Figure 2
The figure is an enlarged plan view of the abrasive grain layer, Fig. 3 is an explanatory diagram of the manufacturing process of the first embodiment of the present invention, Fig. 4 is an enlarged plan view of the adhesive layer, and Fig. 5 is an enlarged plan view of the abrasive grain layer. , FIG. 6 is an explanatory diagram of the manufacturing process of the second embodiment, FIG. 7 is an enlarged plan view of the abrasive grain layer, and FIGS. 8 to 10 are abrasive coated papers obtained by implementing the present invention. 8 is a plan view, FIG. 9 is a perspective view, and FIG. 10 is a plan view. 1, 11... Base material, 2, 12, 19... Adhesive layer,
3, 13... Abrasive grains, 4, 14, 17... Abrasive cloth paper,
5, 15, 18... Groove, 6, 16, 19, 22, 2
3, 24, 26, 27, 28...abrasive grain layer.

Claims (1)

[Claims] 1. An adhesive layer corresponding to the shape of the abrasive coated paper is formed by screen printing on the surface of the base material, abrasive grains are sprinkled on the adhesive layer to form an abrasive layer, and then the abrasive layer is polished. A method for producing abrasive cloth paper, characterized in that the abrasive layer portion is cut in accordance with the shape of the cloth paper. 2 An abrasive grain layer corresponding to the shape of the abrasive cloth paper is screen printed on the surface of the base material using an adhesive mixed with abrasive grains, and then the abrasive grain layer portion is cut to correspond to the shape of the abrasive cloth paper. A method for producing abrasive cloth paper characterized by: