The ejector sleeve is a hollow ejector pin. Rectangular ejector pin holes are usually machined by wire cutting, and the pins need to be quenched to make it sufficiently strong and wear resistant.Ĭons: Difficult machining, easy to wear, and high cost There are certain limitations on ejector location.Įjector blade (Rectangular Ejector): When the finished product features a smaller space and a deeper rib, which makes it hard to arrange the round ejector pin, the flat-top rectangular ejector pin is used instead, which is usually located at the bottom of the rib of the finished product. Round Ejector Pin: As the most common and simple ejector, a round ejector pin and the hole are easy to machine, so they are widely applied as standard parts. Product ejector force is greater than the holding force that is caused by product shrinkage. Usually, the end surface of the ejector pin is 0.05-0.1mm lower or higher than mold cavity surface. For simple and large products, the ejector stroke The ejector stroke is usually 5-10mmĪfter the product is released from the mold. Transparent products, attention should be paid to the selection of ejector Hidden surface or non-decorative surface of the product. In order to avoid ejector marks thatĪffect the appearance of a product, the ejector system should be located on the With great rigidity, such as the rib, flange, and wall edge of the shell-shaped Part where the product is able to withstand the maximum force, i.e., the part To protect the product from deformation,Ĭracking, or perforation caused by ejection, the ejectors should act on the Air Ejection Ejection System design principles
Ejector Block 5.Stripper Plate 6.Lifter 7. Round Ejector Pin 2.Ejector blade(Rectangular Ejector ) 3.Ejector SleeveĤ. So, this is where the ejection system – which falls into the following categories – comes in:ġ. Product ejection cannot be neglected, and during the ejection process, the product should be protected from deformation, ejector marks, cracking and other damages. After a product solidifies in the mold, an effective method is needed to eject it from the mold. Product ejection is the last step in the plastic injection molding process.
0 kommentar(er)
