Ejection mechanism of plastic mould

Abstract

The invention discloses an ejection mechanism of a plastic mould. The ejection mechanism is characterized by sequentially comprising driving devices, ejector rods which are connected with the driving device, an ejector retainner plate which is fixedly connected with the ejector rod, a return pin and a plurality of centres which are all arranged on the ejector plate fixedly and vertically, and a return spring which is sleeved on the return pin; two ends of the return spring are fixed at the opposite inner sides of the ejector plate and a core plate respectively; a return pin receiving groove is formed on the core plate; a passage through which the centres penetrate is arranged on each of the core plate and a core insert; and the driving device is an oil hydraulic cylinder. The ejection mechanism has beneficial effects that the ejection mechanism is reasonable in design and simple in structure, is arranged on the plastic mould to maintain the original shape of an injection part unchanged during the process of mould unloading so as to guarantee the quality of products; the oil hydraulic cylinder is adopted for driving, so that the ejection distance of the centres is controllable, and the accuracy of the ejection distance is guaranteed, the repeatability is strong, and the quality of the products is guaranteed.

Description

technical field [0001] The invention relates to an ejection mechanism of a plastic mold. Background technique [0002] Plastic molds generally include a male template, a female template, a male mold core and a female mold core. During the molding process, the male template, the male mold core, the female mold core and the female template are closed to form a mold cavity. The injection molding machine injects molten plastic into the mold through the nozzle, and the molten plastic enters the mold cavity through the gating system, and then passes through the protection The pressing stage enters the cooling stage. After the product in the mold cavity is cooled and solidified, the male mold core and male template are separated from the female mold core and female template, and the product is separated from the mold cavity. [0003] With the advancement of science and technology, people have stricter requirements on product appearance quality. In some existing plastic molds, whe...

AI Technical Summary

Problems solved by technology

When some existing plastic molds are opened, the injection molded parts are easily adsorbed on the template or the mold core, causing the injection molded parts to bend and deform, especially some thin-walled parts such as laptop casings

Due to its large length or width and thin wall thickness, its strength is poor. When the mold is opened, the edge of the injection molded product is easily adsorbed on the male template, resulting in deformation of the injection molded part, which affects the quality of the product.

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