How to distinguish ejector pin and sleeves in plastic mould?

 In the classification of mold accessories, we often put the ejector pin and sleeves together. In fact, they are two different accessories, which cooperate with each other and have their own characteristics.

First of all, in terms of appearance, the spigot is hollow, the thimble is solid, and generally speaking, the thimble is harder than the spinneret. Secondly, their functions are different: the sleeve is covered on the inner needle and can be moved up and down. The inner needle is fixed on the mold bottom plate, and the sleeve is installed on the ejector plate. When ejecting, the sleeve moves up with the ejector plate. At this time, because the inner needle is fixed on the mold bottom plate, it does not move, so the sleeve pushes out the upper product wrapped in the inner needle.

The matching use of ejector pin and sleeves is called thimble sleeve assembly, which is one of the plastic mold accessories. The thimble sleeve is the thimble in the spinneret assembly. It can be divided into straight spigot, stepped spigot and so on. The thimble sleeve is a kind of metal rod used to eject rubber products from the rubber position. In the high-speed operation of the mold constantly ejects the product, and the telescopic movement of the sleeve is used for wear or processing out of tolerance. The sleeve is a kind of metal accessory of ejecting device with round through hole or blind hole on the product, and the rubber position must be equipped with a ejection device. It consists of a sleeve and a needle. The sleeve is installed on the ejector plate, and the sleeve needle is installed on the bottom plate. After the mold is opened, the rubber position wrapped on the sleeve needle is pushed out by the sleeve.

The types of ejector pin for precision plastic mold parts plant Yize include: flat ejector pin, dome ejector pin, supporting needle, standard ejector pin, non-standard ejector pin, etc
Plastic mold thimbles are made of SKH51, SKD61, SKD11, 65Mn, etc
The toughness of SKH51 thimble is better than that of SKD61; SKD61 thimble can withstand 1600 high temperature; the wear resistance of SKD61 thimble can be greatly improved after nitriding treatment; 65Mn thimble is easy to break because of its poor quality, and most plastic molds have not been equipped with and used with 65Mn thimble.

yizali2LL

The above article from YIZE official website (http://www.yizemould.com/)

The original address:(http://www.yizemould.com/newsshow-49-155-1.html), reproduced please specify.