Precautions for Polishing Injection Molds

Injection mold polishing has two purposes; One is to increase the smoothness of the mold, making the surface of the products produced by the mold smooth, beautiful, and beautiful. The other is that the mold can be easily demolded, and the injection mold factory ensures that the plastic does not stick to the mold and cannot be demolded.

The precautions for polishing injection molds in injection mold factories are as follows:

(1) When starting the processing of a new mold cavity, the surface of the workpiece should be inspected first. The injection mold factory should clean the surface with kerosene to prevent dirt from sticking to the surface of the oilstone and losing its cutting function.

(2) When grinding coarse particles, the order of difficulty should be followed first, especially for some difficult to grind dead corners, which should be studied at a deeper depth first.

(3) Some workpieces can be polished by assembling several workpieces together. First, polish the coarse particles or fire marks of individual workpieces separately, and then polish all workpieces together until smooth.

(4) For workpieces with larger surfaces or sides, use an oilstone to polish out rough lines, and then use a flat steel plate for light transmission inspection to check for any unevenness or reverse warping. If there is reverse warping, it can cause difficulty in demolding or workpiece strain.

(5) In order to prevent the mold workpiece from being inverted or having some joint surfaces that need protection, a saw blade or sandpaper can be used to stick them to the edge, which can achieve the ideal protection effect.

(6) Pull the grinding surface back and forth, and try to flatten the oil stone handle as much as possible. The injection mold should not exceed 25 when leaving the factory; Due to the large slope, the force from top to bottom can easily cause many coarse lines to be ground on the workpiece.

(7) If sandpaper is used to polish the flat surface of the workpiece, the sandpaper used in the injection molding factory should not be larger than the tool area, otherwise it will be ground to areas that should not be ground.

(8) The shape of the grinding tool should be close to the surface shape of the mold, so that the injection mold factory can ensure that the workpiece is not deformed by grinding.

The above points have been completed, and the polished appearance of the injection mold will be very beautiful.