The guide post is usually installed on the fixed plate of the mold, while the guide sleeve is installed on the movable plate or ejector plate of the mold. According to relevant public information, the guide post and guide sleeve in the mold are mainly used for positioning and guiding the mold. Guide post refers to the cylindrical parts installed in the mold, usually made of high-quality alloy steel, and guide sleeve refers to the cylindrical sleeve installed in the mold, usually made of copper, to protect the surfaces of guide post and die hole. In the mold, a plurality of guide posts and guide sleeves are usually installed. The guide post is usually installed on the fixed plate of the mold, while the guide sleeve is installed on the movable plate or ejector plate of the mold. The number and arrangement of guide posts and guide sleeves depend on the structure and technological requirements of the die. The function of guide post and guide sleeve is to ensure the positioning and guidance of the mold during the movement, thus ensuring the accuracy and stability of the mold. The selection of guide post and guide sleeve should be reasonably designed and selected according to the size, weight and service conditions of the die.