JP2001038601A - Manufacture of pattern-like polishing object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide a pattern-like polishing object composed of a polished part and a unpolished part by polishing a part other than a groove part of a polishing object by agitating a large number of granular abrasives and the polishing object having the groove part. SOLUTION: A large number of granular abrasives and a polishing object having a groove part are agitated to polish a part other than the groove part of the polishing object without contacting the abrasives with the groove part of the polishing object to form a pattern composed of a polished part and a unpolished part. Agitation is performed by stirring the abrasives and the polishing object in a vessel, and 1 performed by vibrating them together with the vessel and rotating or vibrating only the polishing object in the vessel. At this time, the groove part is not polished without colliding the abrasives with the inside of the groove part of the polishing object, and the part other than the groove part is polished by colliding the abrasives with the part other than the groove part of the polishing object to thereby form a pattern polished in a part other than the groove part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a patterned polished product by polishing various molded products having grooves, such as plastic molded products, metal molded products, ceramic molded products, and glass molded products, except for the grooves. About.

[0002]

2. Description of the Related Art Hitherto, as a method of forming a polished pattern other than a groove portion on various molded articles having a groove portion, there have been a sanding method, a brushing method and a shot blasting method.

[0003] The sanding method is a method of polishing the surface of a molded article using an ironsmith file, sandpaper, emery paper, or the like. The brushing method is a method of polishing the surface of a molded product using a steel wire brush, a plastic wire brush, or the like. The shot blast method is a method in which particles of aluminum, glass, ceramics and the like are sprayed on the surface of a molded article and made to collide with each other to polish the surface of the molded article.

[0004]

However, in any of the methods, it is difficult to polish the groove except for the groove in the molded product, so that the groove is masked and covered in advance. It is necessary to peel off the masking after performing the above, which is troublesome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method of manufacturing a patterned polished object which solves the above-mentioned problems and does not require much trouble in polishing a portion other than a groove portion of an object to be polished.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention is configured as follows.

That is, in the method of manufacturing a patterned abrasive according to the present invention, the object to be polished having a large number of granular abrasives and grooves is agitated, and the abrasive is not brought into contact with the grooves of the object to be polished. The remaining portion was polished to form a pattern composed of a polished portion and a non-polished portion.

In the above invention, the size of the abrasive may be larger than the opening width of the groove of the object to be polished.

Further, in the above-mentioned invention, the cross-sectional shape of the groove of the object to be polished may be substantially V-shaped, and the angle may be 135 ° or less.

In the above invention, the cross-sectional shape of the groove of the object to be polished is substantially V-shaped, and the size of the abrasive is adjusted within a range smaller than the opening width of the groove, so that the width of the pattern is reduced. May be adjusted.

Further, in the above invention, the same polished body may be polished a plurality of times with different pattern widths.

In the above invention, the object to be polished may have a multilayer structure.

[0013] In the above invention, the material of the abrasive may be at least one of metal, ceramics, glass and plastic.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the method for producing a patterned abrasive according to the present invention, an object to be polished having a large number of granular abrasives and grooves is agitated and the abrasive is not brought into contact with the grooves of the object to be polished. The pattern other than the groove of the polishing body is polished to form a pattern composed of a polished portion and a non-polished portion.

Fine abrasives are used as the abrasive. As the shape of the abrasive, for example, a sphere, a rugby ball, a rice ball, a cube, a rectangular parallelepiped, a cone, a pyramid, and the like can be used. As the material of the abrasive, metal, ceramics, glass, plastic, or the like can be used.

The size of the abrasive is preferably larger than the opening width of the groove of the object to be polished. If the abrasive is smaller than the opening width of the groove of the object to be polished, the abrasive may penetrate deep into the groove, and may be polished to the bottom of the groove so that a pattern cannot be formed.

The shape of the object to be polished may be rod-like, spherical, box-like, plate-like, cylindrical, or conical having a groove. Materials include resin, metal, glass,
Any material such as ceramic and wood can be used. Specific examples of the object to be polished include, for example, a housing for a mobile phone, a housing for a personal computer, a housing for an audio device, a housing for a video camera, a cosmetic container, tableware, a part for home appliances, a part for office equipment, and the like. Can be

The groove of the object to be polished is a portion formed on one or more surfaces of the object to be polished so as to have a U-shaped, U-shaped or V-shaped cross section. Also, like the angle material, the cross-sectional shape of the polished material itself is U-shaped,
When it is formed in a U-shape, a V-shape, or the like, a portion having a U-shape, a U-shape, a V-shape, or the like in cross section is defined as a groove. Furthermore, as in the case where characters or figures are formed as relief-shaped concave portions or convex portions on the surface of the non-abrasive body, portions having a L-shaped cross section as rising portions around the concave portions or convex portions. Also function as a groove.

When the cross-sectional shape of the groove is substantially V-shaped,
It is preferable that the angle is 135 ° or less. 135 °
If the thickness exceeds, the bottom of the groove will be polished to make pattern formation difficult.

In stirring the abrasive and the object to be polished,
It is preferable that the polishing material and the object to be polished be charged into a container. The container is preferably made of plastic, metal, ceramic, rubber, or the like. At the time of feeding, care should be taken not to mix foreign substances.

The stirring may be performed by stirring the abrasive and the object to be polished in the container in the container, or by vibrating the container as a whole, or rotating or vibrating only the object to be polished in the container.

The amount of the abrasive is 20 to 8 times the container volume.
It is preferably 0%. The reason is that the polishing requires a flow of the abrasive during stirring and an impact force between the abrasive and the object to be polished, and the abrasive does not flow when the ratio exceeds 80%. Also, if it is less than 20%, the polishing efficiency is low.

At this time, the grooves are not polished by preventing the abrasive from colliding with the inside of the grooves of the object to be polished, and the parts other than the grooves are polished by colliding the abrasive with the parts other than the grooves of the object to be polished. A polished pattern can be formed.

When the cross-sectional shape of the groove of the object to be polished is substantially V-shaped, the width of the pattern can be adjusted by adjusting the size of the abrasive within a range smaller than the opening width of the groove. it can.

That is, if the size of the abrasive is larger than the opening width of the groove, the abrasive cannot collide with the inside of the groove. However, if the size of the abrasive is smaller than the opening width of the groove, the abrasive can collide with the inside of the groove. At this time, the sectional shape of the groove is substantially V
In the case of the letter shape, the width of the groove becomes smaller as approaching the bottom of the groove, so that the smaller the size of the abrasive with respect to the opening width of the groove, the closer the bottom of the groove can be polished. Conversely, if the size of the abrasive is smaller than the opening width of the groove but not so small as to reach the bottom of the groove, only the vicinity of the opening of the groove can be polished. In this way, by adjusting the size of the abrasive within a range smaller than the opening width of the groove, the collision point of the abrasive in the groove can be arbitrarily adjusted, and the width of the pattern in the groove can be arbitrarily adjusted. Will be able to do that.

In the above method, the same object to be polished can be polished a plurality of times with different pattern widths. For example, the first polishing is performed using a small abrasive that can be polished to the bottom of the groove, and then the second polishing is performed using a large abrasive that can be polished only near the opening of the groove. , The groove portion is a bottom portion of the groove portion that is not polished by any of the first and second times;
A pattern having a side surface portion of the groove portion polished only by the first time and a portion polished by both the first time and the second time can be formed.

The object to be polished may have a multilayer structure. For example, a molded article having a groove may be made of metal, and a coating film of a paint may be formed on the entire surface. By stirring such a non-abrasive body with an abrasive, a portion other than the groove portion is polished to give a metallic luster, and the groove portion can obtain a patterned polished material having a colored pattern with the remaining coating film.

[0028]

EXAMPLE A large number of alumina balls having a diameter of 3 mm were prepared as abrasives. The object to be polished is a molded article made of plastic, aluminum, or a magnesium alloy, and is a plate-like object having a shape of 150 × 100 × 3 mm having an opening width of 1 mm, a depth of 0.5 mm, and a length of 80 mm. Each having a groove and having a V-shaped cross section at an angle of 90 ° was prepared.

Next, 1 kg of the abrasive and the object to be polished were placed in a container, and the container was vibrated to perform polishing.

When the surface of the molded article was polished as described above, the groove of the polished body was not polished, and a pattern could be formed.

[0031]

The method for producing a patterned abrasive according to the present invention employs the above-described configuration, and has the following effects.

That is, the object to be polished having a large number of granular abrasives and grooves is agitated, so that the abrasive is not brought into contact with the grooves of the object to be polished to polish other parts of the object to be polished.
Since a pattern composed of a polished portion and a non-polished portion is formed, a patterned polished product can be easily obtained without any trouble such as a masking process.

Claims (7)

[Claims] An object to be polished having a large number of granular abrasives and grooves is agitated, and an abrasive is not brought into contact with the grooves of the object to be polished to polish the parts other than the grooves of the object to be polished, and the polished part is not polished. A method for producing a patterned polished object, comprising forming a pattern composed of a polished portion. 2. The method according to claim 1, wherein the size of the abrasive is larger than the opening width of the groove of the object to be polished. 3. The method according to claim 1, wherein the cross-sectional shape of the groove of the object to be polished is substantially V-shaped, and the angle is 135 ° or less. 4. The pattern width is adjusted by adjusting the size of the abrasive within a range smaller than the opening width of the groove portion, wherein the cross-sectional shape of the groove portion of the object to be polished is substantially V-shaped. 2. The method for producing a patterned abrasive according to item 1. 5. The method for producing a patterned polished object according to claim 4, wherein the same polished body is polished a plurality of times with different pattern widths. 6. The object to be polished has a multilayer structure.
The method for producing a patterned abrasive according to any one of the above. 7. The material of the abrasive is metal, ceramics,
The method for producing a patterned abrasive according to claim 1, which is at least one of glass and plastic.