Injection mold factory Precautions for polishing

Injection mould Polishing has two purposes; One is to increase the smoothness of the mold, so that the surface of the product produced by the mold is smooth, beautiful and beautiful. The other is to make the mold easy to demould, so that the plastic will not be stuck to the mold and cannot be detached.

Precautions for injection mold polishing are as follows:

Injection mould

(1) When machining a new mold cavity, first check the surface of the workpiece, clean the surface with kerosene, so that the surface of the oilstone will not be stuck with dirt and lose the cutting function.

(2) The coarse grain shall be grinded in the order of difficulty first and then easy, especially for some dead corners that are difficult to grind, and the deeper bottom shall be grinded first,

(3) Some workpieces may have several pieces put together for polishing. The coarse grain or spark grain of a single workpiece shall be grinded separately first, and then all workpieces shall be grinded together until they are smooth.

(4) For workpieces with large plane or side plane, use an oilstone to grind out the coarse grain, and then use a straight steel sheet for light transmission test to check whether there is any unevenness or undercut. If there is undercut, it will lead to difficulty in demoulding or strain.  

(5) In order to avoid paying attention to the undercut of the die workpiece or the need to protect some bonding surfaces, the saw blade can be used for pasting or sandpaper can be used for pasting on the edge, so as to obtain ideal protection effect.

(6) Pull back and forth to grind the mold plane, and place the handle of dragging the oilstone as flat as possible, not exceeding 25 °; Because the slope is too large, the force is punched from top to bottom, which easily leads to many coarse lines on the workpiece.

(7) If the flat surface of the workpiece is polished with copper or bamboo pieces pressed with sandpaper, the sandpaper should not be larger than the area of the tool, or it will grind to the place that should not be grinded.

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

If the above points are done well, the polishing appearance of the injection mold will be very beautiful.