Secondary mold opening mechanism provided with drag hook

Abstract

The invention relates to the technical field of die-casting formation of metal and discloses a secondary mold opening mechanism provided with a drag hook. The secondary mold opening mechanism provided with the drag hook comprises a movable mold and a fixed mold. The fixed mold and the movable mold are attached, so that a mold cavity is internally formed. A jet hole communicated with the mold cavity is formed in the fixed mold. The movable mold comprises a first movable mold body and a second movable mold body. A core bar connected to the second movable mold body is arranged in the mold cavity. The drag hook is hinged to the first movable mold body. A torsional spring is installed on a hinge shaft of the drag hook. A shoulder corresponding to the hooking end of the drag hook is arranged on second movable mold body. A limiting block is arranged on the portion, below the drag hook, of the fixed mold and attached to the back side of the drag hook. A screw is connected to the second movable mold body in a threaded mode. The other end of the screw is rotatably connected to the fixed mold. A hand wheel is connected to the driving end of the screw. By the adoption of the scheme, secondary mold opening can be more stable and reliable; meanwhile, the structure is extremely simple, and manufacturing, installation and maintenance are convenient.

Description

technical field [0001] The invention relates to the technical field of metal die-casting. Background technique [0002] At present, there are the following types of mold mechanisms for the secondary parting of metal die-casting molding: (1) Spring parting rod fixed distance secondary parting, which is when the die-casting machine is opened and closed. . Due to the action of the spring, the mold is first parted on the auxiliary parting surface of the fixed mold part, the middle plate moves with the movable mold, and the aggregate of the main runner is pulled out accordingly. When the nut of the movable mold part is in contact with the plate in between, the plate in the mold stops moving. The movable mold continues to move backward, and the main parting surface opens; because the casting is tightly wrapped on the core, the condensate of the gating system will be broken at the congealing mouth, and then fall out of the mold at the auxiliary parting surface of the fixed mold p...

AI Technical Summary

Problems solved by technology

The mold mechanism has simple mold structure and low cost, but the mold movement is not safe. Once the spring set in the mold breaks, the parting surface cannot be opened, and the main working parts of the mold will be damaged.

(2) The secondary parting of the pendulum hook parting screw fixed distance, it is when the mold is opened, the movable mold part moves backward, because the pendulum hook fixed on the middle plate pulls the stopper on the support plate, the mold moves from the fixed The auxiliary parting surface of the mold part is opened; after the mold is opened to a certain distance, the pendulum hook swings and unhooks under the action of the pressing block, and at the same time the middle plate stops moving under the restriction of the limit screw, so that the main parting surface is opened. The mold mechanism is solid and reliable, and the pressure transmission is good, but the mold structure is complex, and the mold manufacturing, installation, debugging, and maintenance are very inconvenient.

Images