Secondary ejection mechanism

Abstract

The invention discloses a secondary ejection mechanism. The secondary ejection mechanism comprises a lower base plate, mold cores, a first thimble plate and a second thimble, wherein the mold cores are fixedly connected with the lower plate, and the first thimble plate and the second thimble are arranged between the lower base plate and the mold cores; the first thimble plate can move up and down after being driven, first thimbles are arranged on the first thimble plate, the second thimble plate is arranged on the first thimble plate, secondary thimbles are arranged on the second thimble plate, a rotating block is rotatably arranged on the first thimble plate, the inner end of the rotating block is located below the second thimble plate, and the outer end of the rotating block can prop against the mold cores to eject the second thimble plate; a spring mechanism for pulling the first thimble plate and the thimble plate to be close with each other is further arranged between the first thimble plate and the second thimble plate. According to the secondary ejection mechanism, the secondary ejection of a product can be realized by utilizing the first thimble plate to drive and utilizing the linkage between the second thimble plate and the first thimble, and an integral mechanism is simple and is high in stability.

Description

technical field [0001] The invention relates to the technical field of mold preparation, in particular to a secondary ejection mechanism 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 cylinders are respectively...

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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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