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9 points for attention in mold polishing

Update:29-05-2020
Summary:

1) When a new mold cavity starts to be processed, the s […]

1) When a new mold cavity starts to be processed, the surface of the work piece should be inspected first, and the surface should be cleaned with kerosene so that the oil stone surface will not stick to dirt and lose its cutting function.

2) When researching coarse grains, the order of difficulty is to be followed by difficulty. Especially for the dead corners that are difficult to research, the deeper bottom should be researched first, and finally the side and the large plane.

3) Some workpieces may have multiple pieces grouped together to grind them. First, coarse grains or fire patterns of individual workpieces should be separately studied, and then all the pieces should be pieced together and smoothed.

4) Workpieces with large planes or side planes should be roughened with whetstone and then inspected with straight steel sheets to check whether there are any irregularities or undercuts. If undercuts will cause parts Difficult demoulding or strained parts.

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5) In order to prevent the mold parts from developing undercuts or there are some surfaces that need to be protected, you can use a saw blade to paste or use sandpaper to affix the edge, so that you can get the ideal protection effect.

6) Grind the mold surface by pulling it back and forth, and drag the handle of the whetstone as flat as possible, not to exceed 25 °, because the slope is too large, the force is rushed from the top to the bottom, it is easy to cause a lot of rough lines to be developed on the workpiece.

7) If the surface of the workpiece is polished with copper or bamboo pressed against sandpaper, the sandpaper should not be larger than the tool area, otherwise it will be ground to the ground where it should not be ground.

8) Try not to use the grinding machine to repair the parting surface. The parting surface trimmed by the grinding wheel head is rough and has uneven waves. If necessary, the grinding head must be glued to a concentricity balance.

9) The shape of the grinding tool should be close to the surface shape of the mold, so as to ensure that the workpiece is not deformed by grinding.

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