JPS62107954A - Plastic polishing material - Google Patents

Abstract

PURPOSE:To permit the certain and simplified polishing by using the polishing material which is insoluble into water and can be made plastic by heating and easily shaped to a desired form and solidifies through cooling. CONSTITUTION:The abrasive material applied onto an abrasive plate 1 is constituted of combining at least one kind of inorganic superfine particles such as cerium oxide, etc. commonly used and mixing plastic bonder. The plastic binder is insoluble into water and possesses adhesive force, and formed by solidifying and shaping the inorganic superfine abrasive grains into pellet form, and can be made plastic by heating a little and can be shaped to a desired form, and a workpiece can be made free from the outside appearance trouble of flaws and sand trace, etc. When the polishing material is made plastic by heating and extended by the pushing by a surface plate 2, said material is attached onto the polishing plate 1, and a desired curved surface is formed, and said curved surface is fixed through cooling. Through frictional heat is generated in polishing, cooling is performed, and plasticization does not occur, since the water for polishing in which abrasive grains are mixed is allowed to flow. Therefore, a prescribed surface precision is generated in a short time.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The material according to the present invention belongs to the field of polishing materials such as glass and ceramics, and is plasticized so that the surface of the polishing material has the finished shape of the object to be polished. It is used by sliding in close contact with the object to be polished.

(Prior art) Polishing as used in the present invention refers to the final finishing step 1 of polishing an object to be polished, that is, the polishing of an object whose surface has been processed by grinding to improve its dimensions and surface accuracy. GE is the term used to refer to the process of polishing.The sub-key polishing process includes a pitch polishing method and a polishing sheet method.The pitch polishing method uses a thin polishing plate with a concave surface of 1 minute as shown in Figure 1. After pouring heated and melted asphalt, tar pitch, etc. (hereinafter referred to as "pitch 0"), a fixed plate 2 having a required curved surface is pushed into the concave surface of the polishing plate 1 in a fitted manner to form the required curved surface on the pitch surface. .

Next, as shown in FIG. 2, four parts of the object to be polished are attached to the curved surface of a base plate 3 having a required curved surface with an adhesive 5, which is paired with the polishing plate 1 and has a required curved surface. is erected and rotated with a shaft, the polishing plate 1 is fitted and held over the base plate 3, and a polishing liquid mixed with abrasive grains is poured onto the object to be polished 4 to polish the surface to a predetermined precision. This polishing method produces a polished surface with good gloss and clean Newton rings, but the pitch itself has no abrasive power and polishing takes a very long time, and the hardness of the pitch must be selected depending on the material of the object to be polished. Not,
It required considerable skill. In experiments in which abrasive particles were mixed with pitch material, the ability of the pitch to retain abrasive particles was low and polishing time could not be shortened. The polishing sheet method uses a polishing sheet made of polyurethane, nonwoven fabric, felt, etc. mixed with abrasive grains.The sheet is cut to match the inner diameter of the polishing surface 1 and the curvature of the concave surface, and is pasted on the concave surface of the polishing surface 1 with adhesive. After the abrasive sheet is attached, a ruler 2 having a desired curved surface is pushed in to form a desired curved surface on the surface of the abrasive sheet. Plates 6 and 2 correspond to the polishing surface 1 to which the polishing sheet is pasted, and to which the object to be polished 4 is pasted.
The object to be polished is polished to a predetermined precision using the same method as described above. This polishing method is 10-20% compared to pitch polishing.
Polishing is fast, surface accuracy is improved, and the T-Newton ring is stable, but the process of attaching the abrasive sheet to the polishing surface 1 and the process of forming the required curvature on the surface are difficult.
The polishing sheet is hard and does not fit well with the polishing surface 1, and it takes too much time to achieve the required surface accuracy, and it may cause scratches on the polishing surface.
There are many defects in appearance such as grains and poor gloss, which often requires refinishing.

(Problems to be Solved by the Invention) In view of the above, the present invention adopts an abrasive material that does not dissolve in water, can be easily formed into a desired shape by plasticizing with heat, and solidifies by cooling. This is an attempt to solve conventional problems.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an abrasive material to be attached to a polishing surface made of fine abrasive grains and a plastic binder.
gJ will achieve that purpose. That is, the fine abrasive grains include one or more types of abrasive grains such as cerium oxide, zirconium oxide, nitric oxide, alumina, etc., which are commonly used as abrasives, or inorganic ultrafine particles having equivalent performance. Adopt a combination.

A plastic binder is insoluble in water and has adhesive strength, and can solidify the above-mentioned inorganic ultrafine abrasive grains into a pellet shape.It can also be plasticized and molded into a desired shape with a slight addition, and can be attached to the object to be polished. As long as it does not leave any appearance defects such as scratches or grains,
An organic plastic binder consisting of petroleum resin, styrene-butadiene rubber, and a heat stabilizer and hardening agent is employed. The above-mentioned inorganic ultrafine abrasive grains and organic plastic binder are mixed in approximately equal amounts, and the sheet is adhered to the polished surface by heat, easily formed into a predetermined curved surface using a straightener, and solidified by cooling. It is used by grinding against a plate to which the object to be polished is attached.

(Function) As described above, the abrasive material of the present invention is plasticized by 1 air, and when pressed with a machine, it stretches and adheres to the polished surface to form a desired curved surface, and the curved surface is fixed by cooling. Frictional heat is generated during polishing, but since the polishing water mixed with abrasive grains is washed away, it is cooled and does not become plasticized.

According to experiments, the performance comparison results when the number of polished Newton rings was kept within a certain number were as shown in the table below.

The table below shows other performance comparisons between the abrasive sheet material and the abrasive material of the present invention, which is superior to the pitch abrasive material.

As shown in Table 82, this invention creates a polished surface by heating, plasticizing, cooling, and fixing, so the shape of the object to be polished can be accurately and quickly transferred without requiring any skill, making it suitable for pitch polishing and polishing. Achieves the desired surface accuracy in a shorter time than with sheets. Due to the manufacturing process, the sheet has holes for removing air bubbles, which can cause clogging during polishing, but with this invention, there is no clogging, so the surface stability is good, and once the required surface accuracy is achieved, the surface of the object to be polished will be fine. As long as the curvature is not extremely out of order, a fairly consistent Newton's ring will be obtained every time, and the number of surface corrections will be small. In addition, since the surface is softer than that of an abrasive sheet, adhesion is good, and therefore the object to be polished has excellent gloss and is free from appearance defects such as scratches and grains, improving IIE yield.

Since this invented product has thermoplasticity, scraps can be reused.

(Example λ) To explain this invention in detail with reference to Examples, inorganic ultrafine abrasive particles include 40 to 50 weights of cerium oxide, 15 to 25 weights of petroleum resin, 6 to 8 weights of styrene-butadiene rubber, dextrin, and 20 to 50 pounds of pentaerythritol. 25 weight and then put into a mold and heated and melted to form pellets.The pellets are placed in a polishing dish and used.

(Effects of the Invention) As described, the abrasive material according to the present invention compensates for the drawbacks of conventional magnetic layer materials of this type and has various advantages, so it can achieve reliable and simplified polishing, which has been a problem in the polishing world. It brings about.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a polishing tool in which the abrasive material of the present invention is used, and Fig. 2 is a sectional view showing the use of the abrasive material. 4 is the object to be polished. P# Permission applicant IFIik Tomiji j: EW knob yu 2: Soku 3: f3 plate 4: Nuclestone Narimono ta: Azusa 1 agent Otsu: Noodles Figure 1 Figure 2!

Claims (1)

[Claims] A plastic abrasive material consisting of fine abrasive grains and a plastic binder, which is characterized by being shaped into a desired curvature surface and solidified after plasticization.