How is oil contamination formed on molded products?
For the surface treatment of injection molded products such as painting and chrome-plating, it is necessary to clean the surface and remove the oil. If the oil on the surface is not completely removed, many undesirable defects will occur during the secondary processing, which will affect the product quality. So, where does the oil contamination come from?
Oil stains on molded products mainly come from the molding process, when the product is removed and the oil inside the mold comes into contact with the product. The common reasons for oil stains include 1. Release agent; 2. Lubricants; 3. Injection molding machines. Mold release agents are used to facilitate the demolding mold of the product from the mold and to avoid other processing defects due to the difficulty in product release. Lubricating oil is mainly used to reduce friction between the guide pin and gears. Injection molding machines use oil products during maintenance.
For the solutions of oil contamination, the first step is to start with the injection molding process. Apply the right amount of lubricant to the mold when the mold is assembling. If there is too much lubricant it will easily leak into the cavity, The use of mold release agents should also be appropriate. You can add a draft angle to the product to facilitate the demolding. For the products stained with oil, we can use a specific oil cleaning agent, with the help of ultrasonic cleaning equipment for the oil treatment of molded products.
