Product Name: manufacturing process of cold iron: stamping, forming, forging, machining, casting or welding other names: inside and outside the cold iron insert cooling cold iron nail, chill coil, nail and nail by casting cold iron tin or coated with anti mucosa slurry of low carbon steel wire or process. And can be processed into the shape and size of every kind of. Either a horseshoe nail or a straight nail can be used as a cold iron. In casting, chills are used to control shrinkage and to achieve directional solidification. Cold Tiefang against the wall in the casting mold. The inner cooling iron is pressed into the core or die wall so that a large part of them can be inserted into the cavity so as to achieve the desired result. Edit this section to classify the chill to increase the local cooling rate of the casting. The metal block placed in the inner cavity and work surface is called the cold iron. Cold iron is divided into two categories: internal cooling iron and external cooling iron. A metal chill block placed in a mold cavity that is fused with a casting shall be called an internal cooling iron. In shape (core), the metal block placed on the surface of the shape (core box) is called outer cooling iron. The effect of graphite chill casting, cold iron to improve the riser effect and preventing casting shrinkage, ensure the casting quality plays an important role in EPC process and can use the same common casting cold iron. Cold in the sand water could add; cold could embed or adhesive inside the model in modeling, can also be extended to the cold iron type, fixed in the sand.
The principle of internal and external cold iron is similar to that of common casting. 1. Prevent shrinkage and porosity at the point where the riser is difficult to fill. Two to prevent cracks in the cross section of the wall thickness and sharp changes. Three, with the riser used to strengthen the casting sequence of solidification conditions, expanding the riser feeding distance or range, reducing the number or volume of riser. Four, the use of cold iron to accelerate the cooling of individual hot nodes, so that the entire casting close to the solidification at the same time, can prevent or reduce the deformation of castings, but also improve the yield of the process. Five improve the local metallurgical structure and mechanical properties of castings. For example, the matrix structure is refined to improve the surface hardness and wear resistance of the casting. Six reduce and prevent segregation in heavy wall castings. The role of cold iron is to accelerate the cooling rate of a part of a cast iron during casting. Because of the need of the structure of the cast iron parts caused by uneven wall thickness, some parts are thick, cooling in the cooling process is slow, the thickness of thin part cooling fast, makes the same casting parts of uneven cooling speed.
