Casting technology: the application of casting theory and system knowledge of the production of cast technology and methods. Including casting process, pouring system, feeding system, vents, chilling system, special casting process and so on.
Casting process design includes: casting process design, casting the design of the map, the design of cast assembly drawings and the production process cards.
Pressure is applied to the molding sand in the flask by means of pressure or hydraulic pressure through the indenter or pattern to tighten the molding sand. Its pressure is generally 0.25 ~ 0.4 MPa. This molding machine, so that away from the pressure surface of the sand compactness is poor. In the early 1950s, a high-pressure molding machine appeared, with a pressure of 0.7 MPa or more on the sand surface. The pressure head of high-pressure molding machine is divided into flat pressure head, forming pressure head and multi-contact pressure head and other structural forms. Which is the most widely used high-pressure multi-contact molding machine. High-pressure multi-contact molding machine head is divided into many small blocks can move up and down ─ ─ contact, through the hydraulic cylinder can get a lot of pressure. Compaction, the contact according to the following model height (ie, the pressure sand layer thickness) to apply the appropriate pressure, so that the sand type to obtain a high degree of uniformity and hardness. This type of molding machine is equipped with microseismic shock mechanism, to adapt to the complex shape of the shape. High-pressure multi-contact molding machine used four column structure, a single station and duplex station. In order to meet the production of small and medium volume castings, this molding machine with a template replacement device, replace the template, the molding machine without downtime. The use of high-pressure multi-contact modeling, sand casting can be poured thin-walled, accurate size, smooth surface castings.