Laizhou Dingtai Machinery Co., Ltd.

　　The reasons why shot blasting of ductile iron castings is not clean mainly include the following aspects:

　　Inappropriate shot blasting material: There are many types of shot blasting materials, and different types of shot blasting materials are suitable for different types of workpiece materials and rust removal requirements. If the shot blasting material is not suitable, it will lead to poor rust removal effect.

　　Improper setting of shot blasting machine parameters: The parameter settings of the shot blasting machine include shot blasting amount, shot blasting speed, shot blasting angle, etc. If the parameters are not set properly, the shot blasting material will not have enough force, and the oxide layer, dirt, etc. on the surface of the workpiece cannot be removed.

　　Equipment damage or defects: Damage or defects in the shot blasting machine equipment will also lead to unclean rust removal. For example, damage to the inner lining of the shot blasting machine, wear and tear of the separator screen, and wear and tear of the shot blasting wheel will all affect the rust removal effect of the shot blasting machine.

　　The shot blasting fan-shaped throwing angle is not aligned with the workpiece to be cleaned: If the throwing angle of the shot blasting is not aligned with the workpiece to be cleaned, it will lead to incomplete cleaning.

　　Poor quality shot blasting: Impurities mixed in the shot blasting or too much waste sand and dust will affect the normal operation and cleaning effect of the shot blasting.

　　Wear and tear of equipment parts: Excessive wear and tear of parts such as the shot blasting directional sleeve window and the shot blasting wheel will cause uneven distribution of shot blasting, affecting the cleaning effect.

　　Methods to solve the problem of unclean shot blasting of ductile iron castings include:

　　Select suitable shot blasting material: Select suitable shot blasting material according to the workpiece material and rust removal requirements. For cast iron parts and forgings that are more difficult to remove rust, it is recommended to use high-hardness shot blasting materials such as steel sand and steel shot.

　　Adjust shot blasting machine parameters: Adjust the shot blasting amount, shot blasting speed, shot blasting angle, and other parameters according to the specific situation of the shot blasting machine equipment and rust removal requirements. Generally speaking, the larger the shot blasting amount and speed, the greater the shot blasting force, and the better the rust removal effect.

　　Regularly maintain equipment: Regularly maintain and maintain the shot blasting machine equipment, and promptly replace damaged shot blasting wheels, plates, separator screens, and other accessories to maintain the equipment in good condition.

　　Check and replace worn parts: Regularly check the condition of parts such as the shot blasting directional sleeve window and the shot blasting wheel, and promptly replace worn parts to ensure uniform distribution of shot blasting.

　　Optimize workpiece placement: Ensure that the workpiece is reasonably placed in the shot blasting chamber to avoid mutual occlusion and affect the coverage of the shot blasting.

　　Clean up dust inside equipment: Regularly clean up dust and debris inside the shot blasting machine to prevent them from interfering with the normal operation and cleaning effect of the shot blasting.