Matters Needing Attention During The Polishing Process Of The Mold Surface
1. When a new cavity begins to be processed, the surface of the workpiece should be inspected first, and the surface should be cleaned with kerosene so that the surface of the oilstone does not stick to dirt and the function of cutting is lost.
2. When grinding rough lines, it should be carried out in the order of difficulty and easyness. Especially some dead corners that are difficult to study, the deep bottom must be studied first, and finally the side and the big plane.
3. Some workpieces may have multiple pieces assembled together to grind light. It is necessary to separately study the rough or fire pattern of a single workpiece, and then all the workpieces are ground and smoothed.
4. For workpieces with large planes or side planes, use oil stone to grind coarse lines and then use straight steel sheets for light transmission inspection to check whether there are any uneven or inverted buckles. If there is a reverse buckle, the workpiece will be caused. Difficulty in demoulding or strained parts.
5. In order to prevent the mold workpiece from being inverted or having some bonding surfaces to be protected, it can be pasted with a saw blade or sanded on the side, so that the ideal protection effect can be obtained.
6. The plane of the grinding mold is pulled back and forth, and the handle of the oil stone is pulled as far as possible, not to exceed 25°. Because the inclination is too large, the force is rushed from the top to the bottom, which easily leads to the development of many rough lines on the workpiece.
7. If the plane of the workpiece is polished with copper or bamboo pressed sandpaper, the sandpaper should not be larger than the tool area, otherwise it will be researched where it should not be studied.
8. Try not to use the grinding machine to repair the mold surface. Because the parting surface of the grinding wheel head is rough and the waves are uneven, if necessary, the grinding wheel head must be repaired to the concentricity balance.
9. The shape of the tool to be ground should be close to the surface shape of the mold to ensure that the workpiece is not deformed by grinding.