What should be paid attention to when polishing injection molds?

Injection mold polishing has two purposes; one is to increase the smoothness of the mold, so that the surface of the product produced from the mold is smooth, beautiful and beautiful; .

The matters needing attention in injection mold polishing are as follows:

(1) When a new mold cavity starts to be processed, the surface of the workpiece should be checked first, and the surface should be cleaned with kerosene, so that the oilstone surface will not stick to dirt and lose the cutting function.

(2) Grinding rough lines should be carried out in the order of difficulty first and then easy, especially for some dead corners that are difficult to grind, and the deeper bottom should be ground first.

(3) Some workpieces may have multiple pieces assembled together for polishing. First, the rough pattern or fire pattern of a single workpiece should be ground separately, and then all the workpieces should be ground together until smooth.

(4) For workpieces with large plane or side plane, use whetstone to remove rough grains, and then use a straight steel sheet for light transmission inspection to check whether there is any unevenness or inversion. Difficulty in demolding or part strain.

(5) In order to prevent the attention of the mold workpiece from being inverted or there are some bonding surfaces that need to be protected, it can be pasted with a saw blade or on the edge with sandpaper, so that the ideal protection effect can be obtained.

(6) Pull the mold plane forward and backward, and flatten the handle of the oilstone as much as possible, and do not exceed 25°; because the slope is too large, the force rushes from top to bottom, which will easily lead to a lot of rough lines on the workpiece.

(7) If the plane of the workpiece is polished with a copper sheet or a bamboo sheet pressed against sandpaper, the sandpaper should not be larger than the tool area, otherwise it will grind to the place that should not be ground.

(8) 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 ground and deformed.