JP3800610B2 - Abrasive - Google Patents

Description

  The present invention relates to an abrasive used for surface finishing of a workpiece, and can be applied to a wide range of fields ranging from metals, ceramics, plastics, or composites thereof. It is suitable for taking out.

  Conventionally, various methods for grinding, polishing, or finishing a workpiece surface have been provided, but it has been necessary to select which method is used according to the purpose of finishing or the like and the material and shape of the workpiece. That is, for example, in the case of a casting, polishing is necessary after rough finishing, while in the case of a precision part, there is also a purpose of finishing the surface smoothly. In addition, the method of grinding or the like differs depending on whether the workpiece material is metal or ceramic.

  In this way, conventionally, depending on the purpose of the workpiece material, finishing, etc., abrasive materials and grinding methods have to be used properly, and the equipment used must be changed each time. Naturally took time and effort.

  Furthermore, it has been difficult to efficiently finish a workpiece having a complicated surface shape by any of the conventional methods. In particular, industrial molds and dental prostheses have complex irregular surfaces, and it takes time and effort to polish the surface. Furthermore, since a large amount of abrasive dust is generated during work even in the environment, it has a great problem in terms of hygiene for the operator. As described above, regarding grinding or polishing, in many fields, basic problems such as poor workability and poor work environment have not been fundamentally solved.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and aims to provide an abrasive that can finish a complex surface in a short time and maintain a good working environment. is there.

In order to achieve the above-described object, the present invention uses a means in which an artificial composition such as a synthetic resin foam or rubber is used as a core, and a polishing powder layer is provided on the surface of the core using a non-curable adhesive as a binder . It was. The abrasive is used for grinding, polishing, buffing, mirror finishing (hereinafter simply referred to as finishing, etc.) of the workpiece surface with abrasive powder. This is done by spraying. Here, the “core” refers to a granular carrier for supporting the abrasive powder layer, and a material capable of adhering the abrasive powder is required due to its affinity with the binder. However, the size, shape, specific gravity, hardness and the like are changed as appropriate.

  In the second aspect of the present invention, means for providing a polishing powder layer formed by kneading polishing powder and a binder on the core surface is used. This means is also common to the means of claim 1 in that an abrasive powder layer is formed on the core surface. However, the means of claim 1 applies a binder to the core surface, and then polishes the abrasive powder by, for example, coating the abrasive powder. In contrast to forming a layer, the claim 2 is different in the method of forming the abrasive powder layer in that the abrasive powder and binder previously kneaded are adhered to the core surface to form the abrasive powder layer. . According to the second aspect, a uniform polishing powder layer can be formed on the core surface with good workability. Note that, even with the abrasive material by the means, the work surface is finished by spraying, and the definitions of the core and the abrasive powder are the same as those in the first aspect.

According to the fourth aspect of the present invention, the means of providing abrasive powder in multiple layers on the core surface in each of the above means is selectively used. By the way, when the abrasive of the present invention is used, the abrasive powder layer may peel from the core surface depending on the adhesive strength of the binder. Therefore, since the abrasive material once used becomes a part or all of the polishing powder layer missing, it cannot be used for the next finishing or the like unless the polishing powder layer is formed again. Therefore, by making the polishing powder layer into multiple layers as in the above means, even if one of the layers is peeled off, the lower polishing powder layer is exposed, so each time the polishing powder layer is re-formed. Even if not, it is possible to use an abrasive material corresponding to at least the number of layers.

  In the present invention, the “binder” refers to one having an adhesive force or an adhesive force that can attach at least abrasive powder to the core surface. Of these, when a binder that cures with time is used, the abrasive powder cannot be reattached to the core surface unless it has re-wetting properties such as polyvinyl alcohol. Therefore, in claim 4, a non-curable adhesive is used as the binder. Here, the pressure-sensitive adhesive does not mean only a so-called pressure-sensitive adhesive used in a gum tape or the like, has the above-mentioned adhesion strength, is not cured with time, and even if the abrasive powder peels off. It is defined as maintaining adhesive strength (adhesive strength). Specifically, rubber glue is disclosed as an example. And according to the said adhesive, polishing powder can be again made to adhere with respect to the core surface of the abrasive material which once used and the polishing powder peeled off (re-forming of a polishing powder layer). However, the adhesive strength of the adhesive is adjusted according to the purpose of finishing, the spraying speed of the abrasive of the present invention, and the like.

  As described above in detail, the abrasive material of the present invention is a simple configuration in which a polishing powder layer is provided on the core surface, but the workpiece surface can be finished in a desired mode only by changing the spraying amount or spraying speed. In addition, if the core and polishing powder are changed, it can be finished more precisely.

  Furthermore, in the configuration in which the abrasive powder layer is provided in multiple layers, even if the abrasive powder layer is peeled off in the finishing operation, the workpiece can be finished with the lower abrasive powder layer, so that the same abrasive is continuously used. Can be used.

  Furthermore, in the case of using an adhesive as a binder, since the adhesiveness is maintained for a long time, the abrasive powder is again applied to the abrasive from which the abrasive powder has been peeled off without being newly applied. Can be attached.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view conceptually showing an abrasive material 10 according to the present invention. The abrasive material 10 is elastic, for example, a synthetic resin foam material, and any of the internal passages are On the core 1 manufactured by cutting a porous body having continuous pores 1a communicating with the outside into a size of about 100 μm to 5 mm, a polishing powder layer 2 made of polishing powder of about 25 μm or less is formed in multiple layers using a binder. Do it. And in order to finish the workpiece | work surface using the said abrasive material 10, it is performed by the method of spraying the abrasive material 10 with respect to the workpiece | work surface from a diagonal with a suitable spraying apparatus, an injection apparatus, etc.

  The core 1 functions as a carrier that supports the abrasive powder through a binder having affinity with the core 1, and the material thereof may be an artificial composition such as rubber in addition to the synthetic resin foam, Can adopt a natural composition such as corn. In addition, the smaller the size of the core 1, the smaller the energy of collision with the workpiece, so that the abrasive powder layer 2 is less likely to peel from the core 1. Furthermore, a soft core with a small specific gravity is suitable for mirror finishing and polishing, and a hard core with a large specific gravity is suitable for grinding. As described above, the material, size, and the like of the core 1 are selected in accordance with the purpose of the workpiece material and finishing.

  On the other hand, the binder is preferably (1) adhesive performance lasting for a long time, (2) high adhesive strength, (3) good operability, and (4) good environmental characteristics. For example, rubber glue is applicable to satisfy all of these conditions. Under the condition (1), the abrasive powder 2 can be adhered to the core 1 multiple times. In other words, the core 1 can be reused. Specifically, a non-curable pressure-sensitive adhesive is applicable, but a rewet adhesive may be used. Under the condition (2), inadvertent peeling of the abrasive powder layer 2 can be prevented. However, if the adhesive force is too large, the adhesive may be inconvenient, such as dust adhering to the abrasive material, and the abrasive material may adhere to the injection device, which causes troublesome maintenance. It is adjusted according to the speed or the purpose of finishing. The adhesive strength can be adjusted by selecting the binder itself from a specific one, diluting with water, mixing with other agents, or the like, but other means may be used. Here, what is necessary as a binder is that at least the abrasive powder layer 2 can adhere to the core surface, and that the abrasive powder layer 2 has adhesiveness or tackiness that does not peel off when sprayed. On the other hand, under the condition (3), the abrasive powder layer 2 can be formed on the core surface with good workability. The condition (4) does not adversely affect the workers.

  Here, the polishing powder layer 2 may be a single layer, but it is also significant that the polishing powder layer 2 is formed in multiple layers as in the present embodiment. There are the following two methods for forming the polishing powder layer 2 in multiple layers. First, a method of forming the abrasive powder layer 2 by applying a binder to the surface of the core 1 and then applying the abrasive powder thereon. Secondly, a method of forming a polishing powder layer 2 by kneading a binder and polishing powder in advance and attaching it to the core surface. With any of these methods, the abrasive powder layer 2 can be formed on the core surface. However, if the second method is used, the abrasive powder layer 2 is uniformly formed on the core surface with good workability. be able to. When the polishing powder layer 2 is formed in multiple layers, in the first method, the polishing powder layer 2 is formed in the order of binder, polishing powder, binder and polishing powder from the core surface. On the other hand, when the abrasive powder layer 2 is formed in multiple layers by the second method, the kneaded product of the binder and the abrasive powder is adhered to the work surface in several steps. Thus, when the abrasive powder layer 2 is provided in multiple layers, it is not necessary to attach the abrasive powder 2 every time it is used, and the same abrasive 10 can be used multiple times.

  The work surface grinding process by the abrasive 10 is shown in FIG. First, the abrasive 10 is sprayed obliquely onto the work surface W using a spraying apparatus as appropriate (see FIG. 2A). The abrasive 10 collides with the workpiece surface W and is plastically deformed, and starts grinding the workpiece surface W (see FIG. 2B). Subsequently, the abrasive material 10 slides on the workpiece surface W while being deformed, and the workpiece surface W is ground by the polishing powder 2 by the amount S that the abrasive material 10 has moved (see FIG. 2C). Then, the abrasive material 10 repels from the workpiece surface W and finishes the grinding (see FIG. 2D).

  As is clear from the grinding process, according to the abrasive material 10 of the present invention, the finishing effect is almost the same as that of sandpaper polishing by adjusting the spraying amount. On the other hand, even if the spraying speed of the abrasive 10 is adjusted, the finishing condition of the workpiece can be changed. For example, when the work surface is made of a soft material or a brittle material, by reducing the spraying speed of the abrasive 10, excessive grinding can be eliminated and the surface of the work can be finished satisfactorily. That is, the kinetic energy of the abrasive 10 can be adjusted by adjusting the spraying speed of the abrasive 10, and the frictional force of the abrasive 10 on the workpiece surface, that is, the cutting force by the abrasive powder 2 can be adjusted. Furthermore, depending on the surface shape of the workpiece, compressed air may be sprayed simultaneously with the abrasive material 10. This is because when there is a recess on the surface of the workpiece, the abrasive 10 may accumulate in the recess and the grinding efficiency may be reduced. However, since the abrasive 10 has a low specific gravity, the compressed air is blown into the recess to blow the recess. This is because the accumulated abrasive 10 can be quickly removed, and the grinding efficiency can be increased.

Conceptual diagram of the abrasive of the present invention Work surface grinding process with the abrasive material of the present invention

Explanation of symbols

1 Core 1a Continuous pore 2 Polishing powder layer 10 Abrasive material

Claims (4)

An abrasive that is sprayed on the surface of a workpiece, and an abrasive composition is provided with a synthetic resin foam or an artificial composition such as rubber as a core, and a non-curable adhesive as a binder on the surface of the core . Abrasive powder layer that is sprayed on the surface of a workpiece and has an artificial composition such as a synthetic resin foam or rubber as a core, and the surface of the core is kneaded with a binder made of a non-curable adhesive and abrasive powder Abrasive material provided with. The abrasive according to claim 1, wherein the abrasive is sprayed obliquely on the work surface. The abrasive according to claim 1, wherein the abrasive powder layer is provided in multiple layers.

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