Automatic core ejecting device of core making machine

Abstract

The invention belongs to the technical field of tooling design in foundry enterprises, and mainly relates to an automatic core ejecting device of a core making machine. The automatic core ejecting device comprises a press plate and a core ejecting plate, which are arranged in parallel, wherein the press plate is provided with at least two first return guide rod holes and at least one first core ejecting rod hole, the core ejecting plate is provided with second return guide rod holes corresponding to the first return guide rod holes, and further provided with a second core ejecting rod hole corresponding to the first core ejecting rod hole, return guide rods are arranged in the first return guide rod holes and the second return guide rod holes, core ejecting rods are arranged in the first core ejecting rod hole and the second core ejecting rod hole, compression bosses are arranged on the return guide rods, return bosses are arranged on the core ejecting rods and located on one side of the core ejecting plate, the compression bosses are located on the other side of the core ejecting plate, and a spring is mounted on one end of each core ejecting rod in a sleeving manner and compressed between each return boss and the press plate. The automatic core ejecting device of the core making machine has the advantages that the core ejecting device is prevented from being independently arranged outside a core box of the core making machine, the die space is saved, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of tooling design in foundry enterprises, and mainly relates to an automatic core-jacking device of a core-making machine. Background technique [0002] At present, the core making machine itself does not have a matching core ejector mechanism. In the prior art, when the left and right core boxes are opened, the core rod is used to fix the sand core on the base, and then the core rod is manually held to take out the core. When this kind of tooling design structure produces sand cores with larger cross-sections, the sand cores can still be taken out smoothly due to their better strength. However, when producing sand cores with small cross-sections, such as cylinder oil channel sand cores, the minimum cross-section reaches ∮15mm. Since the slender sand cores are not strong enough, it is difficult to overcome the friction of the core box only by the strength of the core rod. It is very easy to cause the sand c...

AI Technical Summary

Problems solved by technology

However, when producing sand cores with small cross-sections, such as cylinder oil channel sand cores, the minimum cross-section reaches ∮15mm. Due to the insufficient strength of the slender sand cores, it is difficult to overcome the friction of the core box only by the strength of the core rod. It is easy to cause the sand core to break, the defective rate is high, and the production efficiency is low

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