A clamping device for direct extrusion casting mold

Abstract

The invention discloses a die locking device for directly extruding a casting die. The die locking device comprises an upper die locking ring and a lower die locking ring, wherein the upper die locking ring is arranged at the outer part of a right side die in a sleeving way, the lower die locking ring is arranged at the outer part of a left side die in the sleeving way, an annular inner surface of the upper die locking ring and the lower die locking ring is in a consistent angle with a conical surface of a mould assembling position of the left side die and the right side die, the left side die and the right side die can be mutually matched during mould assembling, and a self locking angle can be formed. When the left side die and the right side die are in the mould assembling in advance, the lower die locking ring moves to a side die lower mould assembling position under the driving of a lower die locking ring driving cylinder and is subjected to self locking, and the upper die locking ring moves to a side die upper mould assembling position under the driving of an upper die plate and is subjected to the self locking; a side die is locked after the upper die locking ring and the lower die locking ring reach the mould assembling position, a sealed cavity is formed by the upper die locking ring, the lower die locking ring, the side die, an upper die and a lower die together, and die assembling and mold filling are realized; after the mold filling, the upper die moves downwards for pressurizing, a connecting screw rod on the upper die locking ring returns to an upper die plate hole, movement separation of the upper die locking ring and the upper die is realized, and a die locking force during an extruding process is provided by the upper die locking ring and the lower die locking ring together.

Description

technical field [0001] The invention relates to the field of squeeze casting, in particular to a clamping device for a direct squeeze casting mold. Background technique [0002] Squeeze casting refers to forming and crystallizing and solidifying the liquid or semi-solid metal poured into the mold cavity under high mechanical pressure, so as to obtain high-quality parts with fine grains, dense internal structure and high surface finish. A forming method. At present, squeeze casting products both at home and abroad have a tendency to be large-scale, complex and lightweight. [0003] Due to the characteristics of large volume, complex shape structure, uneven wall thickness, and local forming difficulties, large and complex parts have the following characteristics and requirements when they are produced by direct extrusion casting forming process: [0004] (1) For the direct squeeze casting forming process of large and complex parts, in order to obtain a shaped casting with ex...

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Problems solved by technology

[0007] Chinese patent 201210396426.4 uses a floating direct extrusion casting mold to realize the direct extrusion casting forming production of large aluminum alloy wheels. Extrusion of molten metal in the mold cavity, but the moving coil structure of the mold has strict requirements on the shape of extrusion castings, and is not suitable for parts with complex shape structures; Chinese patent 200510035694. Interlocking and releasing the interlocking of molds, so as to increase the clamping force of the mold and realize the mold closing and pouring process, but when realizing the closing and pouring, the interlocked molds need to be raised and lowered as a whole, and the molten metal will be in contact with the air for a long time , affecting the quality of molten metal, and its action process is more complicated, which requires higher mold manufacturing; Chinese utility model patent 93203245.1 realizes the extrusion of aluminum alloy wheels by designing molds with multiple diagonal tie rod mechanisms on vertical extrusion casting equipment Die casting production, the inclined tie rod designed in the mold is mainly used for mold clamping, mold opening and material ejection, but this device cannot increase the clamping force during squeeze casting production, nor can it realize mold closing and pouring

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