Secondary ejection mechanism for long strip products

Abstract

The invention discloses a secondary ejection mechanism for strip-shaped products, which comprises a lower base plate, a core fixedly connected with the lower base plate, and a first ejector plate and a second ejector plate arranged between the lower base plate and the core , the first ejector plate is driven to move up and down and has primary ejector pins on it, the second ejector plate is arranged above the first ejector plate and has secondary ejector pins on it, in the first ejector plate A rotary block is rotatably arranged on the ejector plate, the inner end of the rotary block is located below the second ejector plate and the outer end can be held against the core to lift the second ejector plate; A spring mechanism for pulling them closer is also arranged between the ejector plate and the second ejector plate. The present invention adopts the method that the first ejector plate is driven and the second ejector plate is linked with the first ejector plate, which can realize the secondary ejection of the product, the overall mechanism is simple and stable, and the driving mechanism for the secondary ejection is saved, reducing the The production cost is reduced, the control is simplified at the same time, the overall control is smooth, and the ejection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mold preparation, in particular to a secondary ejection mechanism for strip-shaped products with simple structure and low cost. Background technique [0002] For a long time, the ejection power of bumper molds has been powered by hydraulic cylinders, because bumper molds are basically designed and processed in the way of secondary ejection structures due to product structure and production needs. In order to meet the requirements of ejection balance. The design of the oil cylinders is arranged according to the symmetrical design, that is to say, the oil cylinders are arranged according to the symmetrical design of two pairs, so four oil cylinders are needed for one ejection of the mold. Adding one ejection requires 4 more oil cylinders. The ejection system of such a set of bumper molds requires 8 oil cylinders. The following steps are included when the mold is ejected, [0003] a. The two sets of oil ...

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Problems solved by technology

[0007] However, the total price of 8 oil cylinders will exceed 100,000, which greatly increases the production cost of the mold. At the same time, when the first ejection stroke is in place, the hydraulic system needs to be blocked to prevent oil leakage.

And only when the first ejection hydraulic system is locked, the low secondary ejection system can work. When the mold returns to its position, the ejector plate ejected for the second time needs to return to the ejector plate ejected for the first time, and then Lock together with the ejector plate ejected for the first time, and then return to the initial state together with the ejector plate ejected for the first time, which makes the control system of the oil cylinder complicated and cumbersome, thus making the production efficiency of the mold low

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