JPH046499B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a polishing sheet for polishing ceramics, glass, jewelry, etc. by fixing it to an endless belt or a rotating body.

[Conventional technology]

Conventionally, this type of abrasive sheet has been made by bonding abrasive grains such as diamond to a base material such as cloth or polyester film using a resin adhesive, or by electrodepositing abrasive grains onto the surface of a metal foil base material by electroplating. etc. are known.

[Problem that the invention seeks to solve]

The conventional polishing sheet described above has the following problems.

(1) The former type of abrasive sheet, in which abrasive grains are fixed to cloth or polyester film by adhesive means, is not suitable for mass production, and the density of the abrasive grains is not uniform, and the retention of the abrasive grains to the base material is weak, resulting in a lack of durability. There was a problem in that the abrasive grains easily peeled off from the base material and fell off due to frictional heat, resulting in low polishing efficiency.

(2) In addition, the latter abrasive sheet with abrasive grains fixed to a metal foil base material by electrodeposition, especially when this sheet is attempted to be formed into an endless belt,
Since the base material is metal foil, it has poor flexibility and pliability, and therefore the turning radius at both ends must be increased to make the turning curved surface larger, resulting in an increase in size and cost. Additionally, the base material tends to accumulate heat, causing grinding burns.

The present invention was developed to solve the above problems, and has excellent flexibility and flexibility, as well as strong holding power of the abrasive grains to the base material, high polishing efficiency, high durability, and excellent heat resistance. The purpose of the present invention is to provide a method of manufacturing an abrasive sheet that is suitable for mass production.

[Means for solving problems]

As a specific means to solve the above problems, copper foil is fixed to a flexible, heat-resistant non-conductive film base material, and a pattern is printed on the surface of the copper foil using a predetermined masking agent. After applying the coating, the copper foil is immersed in a predetermined plating bath containing ultra-hard abrasive grains to eutectoid the abrasive grains, and then the pattern-printed area is peeled off and the exposed copper foil directly under the pattern-printed area is removed. This feature is characterized in that it removes.

[Effect]

According to the manufacturing method of the polishing sheet having the above structure, abrasive grains are eutectoided to the copper foil fixed to the film base material except for the pattern-printed part, and the copper foil in the pattern-printed part is etched etc. Since the film is removed, only abrasive grain surfaces are formed at predetermined intervals on the film base material, so the flexibility and softness of the film itself is not impaired, and the film base material is Improves heat dissipation.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIGS. 1A to 1B show the steps until an abrasive sheet is manufactured by the manufacturing method of the present invention. In FIG. 1A, first, a conductive metal foil such as copper is coated on a film base material 1 made of a film base material 1 that is non-conductive, flexible, pliable, heat resistant, and strong in tensile strength, such as polyimide, polyamide, polyester, etc. 2 is fixed by means of adhesion, vapor deposition, coating, plating, or the like.

Next, as shown in FIG. 1B, pattern printing 3 is applied to the surface of the metal foil 2 in a desired shape depending on the use of the polishing sheet. This pattern printing 3 is for masking the surface of the metal foil 2 to form a non-plated part, and as a masking agent, for example, a plating resist, a UV paint, a laminate film, etc. are used. Film base material 1 with pattern printing 3
After removing oil, dirt, etc. from the surface by a predetermined pretreatment, the material is placed in a plating tank (not shown) and electroplated. This electric plating can be applied to any plating bath such as nickel, chrome, copper, or zinc.
A solution prepared by adding a predetermined amount of ultra-hard abrasive grains to an anionic or cationic surfactant as a dispersant is used. Also, the abrasive grains include diamond,
Alumina (Al ₂ O ₃ ), boron nitride (BN), cubic boron nitride (CBN), titanium carbide (TiC), carborundum (SiC) and other superhard abrasive grains are used. When the base material 1 is immersed in the plating bath as described above and a current is applied at a predetermined current density for a predetermined period of time, abrasive grains 4 are deposited on the surface of the metal foil 2 which has not been subjected to masking treatment, as shown in FIG. 1C. , and are electrodeposited together with the plating 5. At this time, in order to prevent agglomeration of the abrasive grains 4 and equalize the precipitation density, a stirring device or the like may be used in combination to further enhance the dispersion effect.

After the abrasive grains 4 are deposited on the metal foil 2 and temporarily fixed by the plating 5, another plating tank (not shown) is used to deposit the abrasive grains 4 on the surface of the metal foil 2 until a predetermined plating thickness is reached such that the abrasive grains 4 are completely held and fixed on the surface of the metal foil 2. Perform re-plating.

After reaching a predetermined plating thickness, it is then peeled off with a masking agent 3 as shown in FIG. Polishing sheet S
is completed.

Next, an example of use of the polishing sheet S manufactured by the above method will be described below. FIG. 2 shows a case where the abrasive sheet S is cut out into a circular shape and fixed to a rotary disc stand 10 of an electric polisher or the like. In this case, in order to easily replace the abrasive sheet S, for example, Fabric fastener (trade name: Magic Tape) 1 is attached to the base 10 with heat-resistant adhesive.
1A and 11B are desirably attached and removably fixed.

On the other hand, in the case shown in FIG. 3, the abrasive sheet S is cut into strips, which are fixed to the abrasive base material 12 using an adhesive with excellent heat resistance and flexibility, and then both ends are connected to form an endless belt. An example is shown below. For the polishing base material 12, a material having heat resistance, heat dissipation, and flexibility, such as cloth, rubber, or synthetic resin, is used.

The polishing sheet S according to the present invention can of course be applied to all kinds of polishing equipment other than the above-mentioned usage example, and when used, the deposited abrasive grains 5 are arranged at predetermined intervals by pattern printing 3, and the metal foil 2 between them is a film base. Since it is removed from the film base material 1, the flexibility and pliability of the film base material 1 are not lost, and in particular, the endless form of the sheet S is easy, and the radius of the curved surface of both ends can be reduced, allowing for miniaturization. In addition to becoming
It also operates smoothly. Furthermore, since the removed portion of the film base material is directly exposed to the air, heat dissipation is good and heat accumulation in the sheet can be prevented.

In addition, in the above example, the method of depositing abrasive grains on only one side of the film base material was explained, but it is also possible to deposit abrasive grains on both sides simultaneously by the same method, and the polishing sheet manufactured by this method can be In addition to polishing, it can also be used for cutting.

In addition, in the above example, a pattern is printed on the surface of the metal foil using a masking agent to form a non-eutectoid part of the abrasive grains, but depending on the use of the abrasive sheet, a pattern may be printed on the metal foil in advance without pattern printing. In some cases, a predetermined hole is drilled to form a non-eutectoid portion of the abrasive grain.

〔Effect of the invention〕

As explained above, according to the method for manufacturing an abrasive sheet of the present invention, a pattern is printed on a copper foil fixed to a film base material to eutectoid abrasive grains, and then the exposed copper foil directly under the pattern printed area is Since the film is removed, the polishing sheet has excellent flexibility and pliability, and the removed portion of the film base material is exposed to air, which prevents heat accumulation in the sheet, reducing polishing efficiency due to grinding burn, and reducing abrasive grains from the base material. It is possible to prevent falling off and provide an extremely durable abrasive sheet. Furthermore, since the polishing sheet has excellent flexibility and pliability, the sheet can be easily applied in the form of an endless belt, and the operation can be made smoother and more compact than in the past.

[Brief explanation of drawings]

1A to 1E are longitudinal cross-sectional views of main parts explaining the order of the abrasive sheet manufacturing method of the present invention, and FIGS. 2 to 3
The figure shows an application example of the polishing sheet. 1... Film base material, 2... Copper foil, 3... Pattern printing, 4... Abrasive grain, 5... Plating layer.

Claims (1)

[Claims] 1. Copper foil is fixed to a non-conductive film base material with flexibility, heat resistance, and sufficient strength, and a predetermined pattern is printed with a masking agent on the part of the surface of the copper foil that will be removed later. The copper foil is immersed in a predetermined plating bath containing ultra-hard abrasive grains to eutectoid the abrasive grains, and then the pattern printed area is peeled off and the exposed copper foil directly under the pattern printed area is removed. A method for manufacturing an abrasive sheet, characterized by: