Mould structure for centering molding process of rotating shaft symmetrical part

Abstract

The invention discloses a mould structure for the centering molding process of a rotating shaft symmetrical part. The mould structure comprises a fixed mould and a movable mould, wherein a cavity is formed between the fixed mould and the movable mould; the fixed mould is positioned in the center position of the cavity and is provided with a sprue bushing communicated with the cavity; the movable mould is positioned in the center position of the cavity and is provided with a secondary squeezing bar interspersed in the fixed mould and connected with external power equipment; the secondary squeezing bar and the sprue bushing are coaxially arranged; and the head part of the secondary squeezing bar is matched with an inner orifice of the sprue bushing to form an internally-tangent pouring gate structure. According to the invention, the innovative mould structure is adopted, and the secondary squeezing bar arranged on the fixed mould is matched with the sprue bushing, so that both the centering squeezing and the interior contact of an pouring gate can be realized, coherent actions of secondary squeezing and material handle shearing can be formed; and accordingly, the production efficiency of molding is improved, and the product quality is improved.

Description

technical field [0001] The invention relates to a mold structure, in particular to a mold structure which is used in the central casting process of a rotary axis symmetric part and has the functions of central extrusion and gate incision. Background technique [0002] Rotary axis symmetric parts are a kind of centrally symmetrical parts with the rotary axis as the symmetrical central axis, such as aluminum alloy wheels. Taking aluminum alloy wheels as an example, they are usually produced by the central casting process, because they have appearance requirements and have a central hole. , since the optimal secondary extrusion area and gate of this type of casting are at the central axis, in order to improve the quality of aluminum alloy wheels, the best method is to use tapered neck type large gate casting and secondary center Extrusion, large gate casting ensures the smoothness of the casting filler and facilitates the settlement of impurities. Secondary central extrusion at...

AI Technical Summary

Problems solved by technology

[0002] Rotary axis symmetric parts are a kind of centrally symmetrical parts with the rotary axis as the symmetrical central axis, such as aluminum alloy wheels. Taking aluminum alloy wheels as an example, they are usually produced by the central casting process, because they have appearance requirements and have a central hole. , since the optimal secondary extrusion area and gate of this type of casting are at the central axis, in order to improve the quality of aluminum alloy wheels, the best method is to use tapered neck type large gate casting and secondary center Extrusion, large gate casting ensures the smoothness of the casting filler and facilitates the settlement of impurities. Secondary central extrusion at an appropriate time can provide pressure feeding for other extension parts while ensuring the appearance and structure of the central hole, preventing shrinkage cavity or shrinkage. Song, etc., but the existing mold structure can not meet the requirements of this large gate center casting process using the tapered neck type, because it cannot carry out effective secondary center extrusion, and after the casting is formed, due to the tapered neck type Therefore, the backwardness of the mold structure prevents the further development and application of the casting process, resulting in the inability to further improve productivity and product quality

Images