The matching use of the ejector sleeve and ejector pin is called the cylinder needle component, which is one of the plastic mold accessories. Precision ejector sleeves can be divided into straight sleeves and stepped sleeves.
The precision ejector sleeves is composed of two parts, the sleeve (pipe jacking) and the inner needle. The ejector sleeve is sheathed on the inner needle. It can move up and down. The internal needle is fixed on the mold bottom plate, and the driver ejector sleeve is installed on the ejector plate. When the driver ejector sleeve moves up with the ejector plate when the ejector is ejected, the internal needle is fixed on the mold bottom plate without moving, so the driver ejector sleeve will eject the upper product wrapped in the internal needle.
The sleeve pins are generally made of harder metal than the ejector sleeves, such as SKH51, and the hardness can reach 58-60hrc. The sleeve pin made of high-quality high-speed steel has beautiful metallic luster.Generally, the sleeve pin needs to be sprayed with antirust agent to prevent rusting. In the process of use, if the mould is idle for a long time, attention should be paid to antirust. After nitriding treatment, the driver cylinder needle has the characteristics of wear resistance. It is durable hot-working die steel, and it can withstand high temperature above 1200 ℃.
The previous article also mentioned the methods to prevent the mould ejector sleeve from burning. Yize mold is a professional plastic mould part manufacturer. It provides precision ejector sleeves and other precision mold parts for customers at home and abroad.
Dongguan YIZE MOULD Co.,LTD
Address：3/F, Factory Building, No.62, Jinghai East Road, Shatou District,
Changan Town, Dongguan City, Guangdong Province, China