Introduction
Sand core was invented in Germany in 1935 and is widely used in casting to replicate intricate shapes and internal sections in castings. The sand core is secured to the end of a cantilevered core head or arm that protrudes from the mold and is used to shape the molten die cast alloy ......
Sliding Spigot Structure and Protective Sleeve Function and Manufacturing Materials of Steel Pocket
The steel pocket is a kind of seismic restraint used in the construction of steel structure. It is made by rolling steel plate or thermal plastic deformation. It is mainly used to fix the steel bea......