Core-pulling mechanism

Abstract

The invention belongs to the technical field of die casting, and relates to a core-pulling mechanism. The core-pulling mechanism is arranged on a movable die and a fixed die of a die casting machine. A core is arranged between the movable die and the fixed die. A conical die sleeve is arranged in the movable die. The core is located in the conical die sleeve. A plurality of sliding blocks capable of being spliced are arranged between the core and the conical die sleeve. Protrusions capable of pulling lateral holes are arranged on the inner side faces of the sliding blocks. A casting cavity is defined by the fixed die, the core and the sliding blocks. Each sliding block is hinged to an independent linkage rod, the linkage rods are closely attached to the interior of the conical die sleeve, and all the linkage rods are movably connected with a movable push plate arranged on the movable die. The linkage rods are all controlled by the push plate so that consistency can be guaranteed in the lateral hole pulling process of the sliding blocks, synchronous lateral core pulling on a casting is achieved, only one power source (namely, the movable push plate) is arranged, and therefore more energy can be saved.

Description

technical field [0001] The invention belongs to the technical field of die casting. Background technique [0002] In the die-casting production process, when the die-casting has grooves or holes in the direction perpendicular to the mold opening direction, a movable core must be set on the die-casting mold. When the mold is closed, the movable core is inserted into the casting cavity. When the mold is opened, the movable core exits the casting cavity. If the grooves and holes are small and shallow, the casting will have little grip on the core during the condensation process, and the core-pulling action can be completed by using the mechanical core-pulling structure set on the mold when the mold is opened. [0003] The existing movable core moving mechanism is composed of a hydraulic core puller, a core puller seat and a coupling. The piston rod of the hydraulic core puller is fixedly connected with the movable core built in the casting cavity through the coupling. The exp...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned core-pulling process, when it is necessary to core-pulve the lateral holes of the casting, it is necessary to set a corresponding movable core at each lateral core-pulling position, and an independent power mechanism (commonly used feed motor or Cylinder) drives each active core to move, while consuming energy, it is difficult to pull all the movable cores set laterally synchronously, and the asynchronous core pulling of active cores will lead to major quality problems in castings

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