Plastic Injection Mold, Injection Mold Maker, Mold Parts, JinHong Plastic Mold Factory

    There are various forms of ejection systems for injection molds, which are related to the shape, structure, and plastic properties of the product. Generally, there are structural diagrams of ejector systems such as ejector pins, ejector tubes, push plates, ejector blocks, and pneumatic composite ejectors. Its design principles are as follows:

    1\ When selecting the parting surface, try to keep the product on the side with the release mechanism.

    2\The ejection force and position balance ensure that the product is not deformed or burst.

    3\ The thimble must be located where it does not affect the appearance and function of the product.

    4\ Try to use standard parts as safe and reliable as possible, which is beneficial to manufacture and replacement.

    5\The ejection position should be set at a place with high resistance, not too close to the insert or core. For box-shaped and other deep cavity molds, the side resistance is the largest, and the top and side surfaces should be ejected at the same time to avoid product deformation and bursting.

    6\ When there are thin and deep stiffeners, the top rod is generally set at the bottom.

    7\ At the product inlet, avoid setting thimbles to avoid rupture.

    8\ For thin meat products, set a thimble on the runner to take out the product.

    9\ The fit between the thimble and the thimble hole is generally a clearance fit. If it is too loose, it may cause burrs, and if it is too tight, it may cause jamming. In order to facilitate processing and assembly and reduce the friction surface, generally, a matching length of 10~15mm is reserved on the movable die, and the remaining part is reamed by 0.5~1.0mm to form escape holes.