Heavy wheel cast bottom mold making core supporting disc, device and process

Abstract

The invention discloses a heavy wheel cast bottom mold making core supporting disc, a heavy wheel cast bottom mold making device and a heavy wheel cast bottom mold making process. The core supporting disc comprises a lifting rod body and a disc body, which are perpendicular to each other, wherein the lifting rod body is a cone with a thin top and thick bottom; the lower end of the lifting rod body is connected with the middle part of the disc body into a whole; and the upper part of the lifting rod body is provided with a transverse through hole. The device has a sand box, a bottom basin, a mold frame, a mold lifting plate and the core supporting disc, wherein a deboss matched with the disc body is formed in the middle of the inside surface of the bottom part of the bottom basin; the disc body is arranged in the deboss; and the upper part of the cylindrical surface of the sand box is provided with two opposite notches which are as high as the through hole in the upper part of the lifting rod. The device also has a wedge rod of which the length is greater than the diameter of the sand box. The process is to make a sand mold by using the core supporting disc and the mold making device. The disc, the device and the process can improve the rate of finished bottom mold considerably, meet needs of production lines and meet needs for batch and mechanical production of large-sized castings.

Description

1. Technical field [0001] The invention relates to the field of heavy-duty wheel casting molding, in particular to a core tray for heavy-duty wheel casting base molding and its molding device and process. 2. Background technology [0002] The nodular cast iron truck wheel produced by our company is one of the key parts of the automobile axle. Its mechanical properties and performance have extremely high requirements. The weight of a single casting can reach 60-90kg, the maximum diameter can reach 500mm, and the height can reach More than 300mm, and the dimensional tolerance of their castings must be guaranteed to be below CT9 level, which requires us to study and discuss the castings carefully, whether it is the molding process or the pouring process. In the past, the molding process of this product was mainly based on clay sand wet-type manual molding. The specific molding method is as follows: [0003] (1), bottom shape [0004] Turn the mouth of the low basin up, and pl...

AI Technical Summary

Problems solved by technology

[0010] However, in the process of trial production and operation, there is an insurmountable problem that has been bothering our technical workers

Because the bottom mold is a hanging mold, and the diameter of the bottom sand mold reaches 500mm, the height reaches 300mm, and the weight is about 300kg. If certain technical measures are not taken, the bottom mold cannot be lifted at all.

Even if the mold is barely lifted, since the sand mold mainly relies on the adhesion force between the sand box and the upper part of the sand mold to support the weight of the entire sand mold, and most of the sand molds are located in the bottom basin, this adhesion force is not enough to support the weight of the entire sand mold, and the upper part is also very easy to be damaged. Vibration causes sand mold to collapse

As a result, the yield of the bottom sand mold is low and cannot meet the needs of the production line, so that such large castings cannot be mechanized

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