What should be paid attention to the polishing of injection molds?

Release time:2024-04-23
What should be paid attention to the polishing of injection molds?

Injection mold polishing has two purposes: one is to increase the mold's finish, so that the mold out of the product's surface is smooth, beautiful, beautiful, and the other is to make the mold is easy to release the mold, so that the plastic is not stuck in the mold above the off can not come down.
Injection mold polishing should pay attention to the following matters:
(1) When a new mold cavity to start processing, should first inspect the surface of the workpiece, clean the surface with kerosene, so that the oil stone surface will not stick to the dirt caused by the loss of cutting function;
(2) Grinding roughness should be carried out in the order of first difficult and then easy, especially some difficult to grind the dead center, the deeper bottom should be grinded first;
(3) Part of the workpiece may have more than one combination of pieces put together to grind bright, to first separately grind the individual workpiece rough or sparkling, after all the workpieces put together to grind to smooth;
(4) Large plane or side plane of the workpiece, with oil stone grinding to remove the coarse grain and then use a flat steel plate to do light transmission test, check whether there is uneven or inverted buckle bad situation, such as inverted buckle will lead to the workpiece release difficulties or workpiece strain;
(5) In order to prevent the mold workpiece grinding out the inverted buckle or have some fit surface need to protect the situation, can be used to paste the saw blade or use sandpaper on the side, so that you can get the ideal protection effect;
(6) Grinding mold plane with front and back pull, drag the handle of the oil stone as flat as possible, do not exceed 25 °; because the slope is too large, the force from the top downward, easy to lead to grinding out a lot of coarse grain in the workpiece;
(7) If the flat surface of the workpiece is polished with a copper or bamboo sheet pressed against the sandpaper, the sandpaper should not be larger than the area of the tool, otherwise it will grind to the place where it should not be ground;
(8) The shape of the grinding tool should be close to the same shape as the surface of the mold, so as to ensure that the workpiece is not ground deformation;
If you do the above points, then the injection mold polishing appearance will be very beautiful.

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