The jaw plate of the crusher is the main part of the jaw crusher. Jaw plate used by different specifications of the crusher are also different. As the main vulnerable parts of the crusher, the jaw plate of the crusher often needs to be replaced regularly. Most of them are sand casting, but because sand casting is prone to problems such as steel penetration and sand sticking, which will lead to problems such as low productivity and high scrap rate, many manufacturers will not accept such orders. Die casting is used to complete the production of castings. Shanvim will explain how the lost foam casting crusher jaw plate is completed.
Standards for lost foam casting:
The casting of lost foam will directly affect the quality of the product. Therefore, in order to avoid cracks in the later stage, the rounded corners of each transition cannot be ignored. The wall thickness of the jaw plate of the crusher is relatively uniform, so the step casting method is usually used in the lost foam casting, which can make the product solidify at the same time. Generally, experienced enterprises will properly place the slag collecting riser to strengthen the exhaust.
Paint selection:
Next, Shanvim will talk to you about how to choose paint. The lost foam coating should use water-based coatings with high refractoriness and anti-scouring alkalinity. At the same time, the thickness of the coating should be appropriately increased according to the thickness of the casting. The general thickness is 1.2mm-1.6mm, and the tooth surface should also be slightly thicker to avoid occurrence of infiltration steel phenomenon.
Drying and holding time of lost foam:
After the production of the lost foam is completed, the gray product should be fully dried. The crisp sound when knocking proves that it has been dried. The finer tooth shape should also be polished with mixed magnesia when packing to avoid the appearance of steel penetration. The sand mold should be fully shaken. The holding time should be extended as much as possible, and the casting should not be hammered when cleaning, so as to avoid micro cracks, which will cause cracks in the casting during heat treatment or use. During the heat treatment, the temperature should also be raised slowly. After the uniform temperature, the heating rate can be increased appropriately.
Selection of crusher tooth plate material:
The existing crusher jaw plates on the market are usually made of 13ZGMn13 material, which has surface hardening under the action of impact load, forming a wear-resistant surface while maintaining the original toughness of the inner metal, but in the long run , Only by finding materials with high wear resistance can the service life of the jaw plate be extended.
Shanvim as a global supplier of crusher wearing parts, we manufacture cone crusher wearing parts for different brands of crushers. We have more than 20 years of history in the field of CRUSHER WEAR PARTS. Since 2010, we have exported to America, Europe, Africa and other countries in the world.
Post time: Dec-28-2022