If done correctly, injection Pet Preform for injection preforms may be a finishing touch to the success of injection molded parts or products. Whether it's mirror polishing of technical grade products or finding the right texture and method to get the perfect look of a consumer product, the final step in the mold making process is certainly not the least important. The complexity and challenges of mold polishing have allowed this sentiment to return, so this article aims to provide more information about the polishing of injection molds – beyond basic knowledge.
Take advantage of common types of mold finishes
As we review the most common types of injection mold finishes, we will examine some of their ideal uses and share more information about each.
Stone polishing: The roughest polishing level is usually achieved by applying polished stone to the mold to remove the roughest and most visible processing marks. There are many grades of stone finishes that we will talk about later. Stone finishes are available for consumer products. Despite its more irregular nature, it is generally not suitable for tighter tolerance applications.
Paper finishes: Paper finishes are smoother and more reflective than stone finishes and are achieved by applying standard sandpaper abrasives in one direction to the mold. Paper finishes provide a smoother texture for consumer products while still maintaining a matte finish. Paper finishing is also an intermediate step in mirror finishing.
Mirror finish: Highly reflective, almost completely smooth finish, resulting in the same smooth texture of the molded part. Industrial parts and other applications that require very tight tolerances and low friction often require mirror finish. The time and effort required to achieve mirror polishing by mold polishing is often prohibitive unless the workpiece is required for functional reasons.
Mold polishing and parts introduction
Mold finish has a large impact on the ease with which parts are ejected from the cavity after cooling. Interestingly, an overly smooth surface can cause as many problems as excessive roughness. An excessively rough finish (defined here as a rougher finish than a stone finish) presents significant difficulty in rubbing too much for clean parts. As with any uneven surface that is in close contact during exercise, the risk of further wear of the part is high in this case.
For highly smooth mold finishes, such as mirror finishes, the lack of texture makes a product more likely to "stick" into the mold. In any case, the stuck parts are usually damaged by thimbles or other abnormal conditions and take longer to process. Therefore, the best practice for China Plastic Cap Manufacturers is to determine and adhere to the minimum level of completion required by you or your customers, which still meets the requirements of the project.