JPS6171932A - Machining method of material - Google Patents

Abstract

PURPOSE:To prevent the surface of the material from being wounded during the production of watch cover glass of the like by applying starchy protective membrane to the surface of a mirror face glass plate before cutting, polishing, etc., and then washing out it. CONSTITUTION:A mirror glass 1 used as an industrial glass plate is formed in such a way that half paste state starchy liquid made of waste rice and water 5 to 20 times the amount of the waste rice is heated, and the starchy protective membrane thus made is sprayed to both of the faces of the mirror face glass 1, or the mirror glass 1 is once soaked in a bath containing the starchy liquid, then pulled up, and dried by air. After that, it is cut in desired size and shape. After the slant is polished, the starchy protective membrane is washed out with hot water of about 50 deg.-100 deg.. Cover glasses for watch having the surface of mirror face glass are thus produced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for processing materials that can be applied to a wide range of applications, such as plate materials for manufacturing watch cover glasses, industrial precision glass, and the like.

BACKGROUND OF THE INVENTION Conventionally, for example, in order to manufacture a cover glass for a watch or the like from an original plate material for processing, the industrial glass is first adjusted in thickness as necessary, then cut to a desired size and cored, and then subjected to bevel polishing, It was complicated and involved many steps, such as polishing the top and bottom surfaces and strengthening treatment.

Problems to be Solved by the Invention With such conventional techniques, during processing processes such as cutting and polishing, the surface of the material may be scratched or cracked by jigs and chips scattered during processing, and as a result, the processed product There were problems in that the yield was as low as 80-50, and processing costs such as polishing were high.

Therefore, an object of the present invention is to provide a method for processing materials such as glass, in which the surface of the material is not damaged during the processing steps.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention applies a starchy protective coating to the surface of a glass, plastic, metal plate, etc., for example, a mirror glass plate, and then coats the mirror glass plate as desired. It is a method for processing materials, which comprises the steps of cutting, centering, polishing, etc. into shapes, and then washing and removing the starchy protective coating.

Cover glass for watches, etc. is manufactured from working glass plate material.Since it is covered with a protective coating, the glass surface will not be scratched.
Processed products can be obtained with a high yield by washing and removing the starchy protective coating with warm water after processing.

EXAMPLE Hereinafter, a watch cover glass manufacturing process will be described as an example of the present invention based on the drawings.

First, as shown in FIG. 1(A), a mirror glass 1 is used as an industrial glass plate, and a starchy protective coating 2 is coated and dried as shown in FIG. 1(B). The starchy protective coating 2 can be made by adding 5 to 20 times as much water to scrap rice and heating it to make semi-viscous heavy water, and then spraying this starchy liquid onto both sides of the mirror glass 10, or by spraying the mirror glass 1 on both sides. It is formed by immersing it in a tank containing a starchy liquid, pulling it up, and then air drying it.

Next, as shown in (0), cut to desired size, center to desired shape, and perform slope polishing.
The starchy protective film was thoroughly washed away with hot water at 0''C; to produce a watch cover glass piece 6 that retained the mirror glass surface as shown in the previous example.

Figure 2 compares the yield of the watch cover glass ■ obtained by the processing method of the present invention and the watch cover glass ■ obtained by the conventional manufacturing method. did not even reach 80% at the reinforcement inspection stage, but the watch cover glass according to the present invention had a yield of over 95cm, and the remaining 5% had pinholes, air bubbles, etc. on the glass plate from the beginning. This is due to the original injury.

The material for forming the protective film may be glass, plastic, metal, etc. The starch to be formed is not limited to rice, but may also be potato, corn, synthetic paste, or a mixture of these. The concentration of the liquid may be adjusted as appropriate depending on the intended use of the processed product. In either case, the product is completed by simply rinsing off the protective coating.

A starchy protective coating is applied to the surface of the material before processing such as cutting and polishing, so the surface of the material is not damaged by flying chips during processing.
Yield is much higher and mass productivity is improved. In addition, since it is possible to use mirror glass, etc., which is initially highly processed, there is no need for polishing, which is the most expensive part of the equipment, and the starchy protective coating can be easily applied and washed away with a simple operation. As a result, processed products can be supplied quickly and at low cost, and can be used for cutting, polishing, etc. of various types of glass and photomask substrates.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating an example of processing glass according to the present invention, and FIG. 2 is a diagram comparing the yield of processed products according to the embodiment of the present invention and a conventional example, taking as an example the production of a cover glass for a watch. . 1...Mirror glass 2...Protective coating 6...Glass piece

Claims (1)

[Claims] Processing of a material, characterized in that a starchy protective coating is applied to the surface of the material, the material is then subjected to processing such as cutting into a desired shape, coring, polishing, etc., and then the starchy protective coating is washed and removed. Method.