In order to ensure the quality of precision castings, different inspection methods should be adopted to detect the impermissible defects in time according to the different uses and requirements of castings. The inspection of castings mainly includes the surface quality inspection of castings, the internal quality inspection of castings and the comprehensive appraisal of the quality of castings.

For the investment casting industry, its characteristics are many processes, strong coherence, and many variables in each process. These variables are difficult to detect and control, which may eventually be reflected in the causes of defects. Therefore, the defect control of precision casting quality management may ultimately be reflected in the causes of defects. Therefore, as far as defect control is concerned, the prevention of defects should be put in the first place, and various quality problems should be constantly studied and solved. In order to ensure the quality of the market, we should continue to grasp the quality requirements of consumers or users and provide after-sales service through active market research. Quality management is a comprehensive set of research and development, production inspection and sales services in one of the activities.

According to the results of casting quality inspection, castings are usually divided into three categories: qualified products, repaired products and waste products. Qualified products refer to castings whose appearance quality and intrinsic quality meet the relevant standards or technical conditions for delivery and acceptance; repaired products refer to castings whose appearance quality and intrinsic quality do not fully meet the standards and acceptance conditions, but allow repairing, which can meet the requirements of standards and technical conditions for delivery and acceptance of castings after repairing; rejected products refer to castings whose appearance quality and intrinsic quality are not qualified and which are not allowed to be repaired Castings still fail to meet the standards and technical requirements for delivery and acceptance of precision casting. Waste products are divided into internal waste and external waste. Internal waste refers to waste castings found in foundries or precision casting workshops, while external waste refers to waste castings found after delivery, resulting in much greater economic losses than internal waste. In order to reduce the external waste, it is better to sample the castings produced in batches for experimental heat treatment and rough processing before leaving the factory, and to find potential defects in the factory as far as possible, so as to take necessary remedial measures as soon as possible.

Dongying Hongyu Precision Casting Equipment Co., Ltd. is a professional manufacturer of precision casting equipment. With quality management as guarantee and dedicated service as purpose, the company provides you with a complete set of precision casting equipment (silica sol and sodium silicate process), and can design and manufacture products satisfying customers according to customer requirements. Warmly welcome new and old customers to inquire for guidance and negotiate business.