Introduction and advantages of injection mold two stage ejection structure

Generally, the injection mold only carries out one ejection, but the two-stage ejection structure can carry out two ejections with a time difference inside the mold, so when the molding product cannot be removed from the mold only by relying on one ejection, this structural mechanism is more convenient. Due to the special shape of the finished product of the injection mold, or for the needs of mass production, if the finished product is still in the mold hole after ejection, or it cannot fall off automatically, it needs to add another ejection action. This ejection action design is called double ejection.

Secondary ejection should be forced release, mainly used when the hook can not use the inclined top and slider release. Two stage ejection is not only used for forced release, sometimes in order to better mold production, or to avoid gate strain, two stage ejection is a common way. The so-called two-stage ejection structure refers to the structure that can perform the ejection process twice when ejecting the molded product from the injection mold core.

In the case of injection mold stripper ejection structure, the shape of the molded product is carved on the stripper, which makes it difficult for the molded product to fall freely. Therefore, if the two - stage ejection structure is used, the molding is more likely to fall freely. On the other hand, a runner ejector plate is provided inside the ejector plate, so that the runner can be ejector earlier than the formed product. The tunnel gate can improve the cutting effect and reduce the cutting residue significantly.

In addition, it can also be realized by structural design. When there is assembly at the bottom of the edge of the product, there should not be thimble marks, resulting in uneven surface at the bottom of the product, too deep muscles and bones, easy to stick mold, need to be divided into two sections of ejection, in order to reduce the risk of product defects. The mission of Fanstar is to master the core technology of injection molding production, communicate and analyze the technology before mold production with customers from the production needs of finished products, so that the mold delivery time is short, the life is long, the mass production is fast and the finished product quality is excellent! Have the need of injection molding mold welcome to contact us!