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Matters needing attention in polishing of injection molds

2019-12-13
Injection mold polishing has two purposes; one is to increase the smoothness of the mold to make the surface of the product smooth, beautiful and beautiful, and the other is to make the mold easy to release, so that the plastic is not stuck on the mold and cannot be removed. .
The matters needing attention in polishing of injection molds are as follows:
(1) When a new mold cavity starts to be processed, the surface of the workpiece should be inspected first, and the surface should be cleaned with kerosene so that the oil stone surface will not adhere to the dirt and lose the cutting function.
(2) The rough lines should be researched in the order of difficulty first and then easy, especially some hard corners that are difficult to study, and deeper bottoms should be studied first.
(3) Some workpieces may be polished together in multiple groups. First, study the rough or fire pattern of a single workpiece separately, and then polish all the workpieces to smooth
(4) For large-scale or side-plane workpieces, use grindstone to remove rough lines, and then use a straight steel sheet for light transmission inspection to check whether there are any irregularities or undercuts. The part is difficult to demold or the part is strained.
(5) In order to avoid paying attention to the undercut of the mold workpiece or some situations where the bonding surface needs to be protected, it can be pasted with a saw blade or pasted on the side with sandpaper, so that the ideal protection effect can be obtained.
(6) Pull the mold surface back and forth, drag the handle of the whetstone as flat as possible, not to exceed 25 °; because the slope is too large, the force punches from the top to the bottom, which can cause a lot of rough lines on the workpiece.
(7) If the surface of the workpiece is polished with copper or bamboo pressed sandpaper, the sandpaper should not be larger than the area of ​​the tool, or it will be ground where it should not be ground.
(8) The shape of the ground tool should be close to the surface shape of the mold, so as to ensure that the workpiece will not be deformed.
If you do the above, the polished appearance of the injection mold will be beautiful.
mould polish, mould problem
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