A lower sand box of a horizontal boxless molding machine

Abstract

The invention discloses a sand discharging box of a horizontal boxless moulding machine. The sand discharging box of the horizontal boxless moulding machine comprises a sand discharging box bottom plate (5), a sand discharging box frame (6) and a horizontal boxless moulding machine base frame (18), wherein a profiling dowel plate (15) is arranged below the sand discharging box frame (6); a plurality of mutually parallel profiling dowels (12) are vertically and fixedly installed on the upper surface of the profiling dowel plate (15); and the length of the profiling dowels (12) is determined by the outline of a mould, and the upper ends of all the profiling dowels (12) form the shape adaptive to the outline of the mould. By means of the technical scheme, due to the profiling structure of the ends of the dowels of the sand box, the sand mould compression ratio of all the parts inside the sand box is consistent, the compression force is relatively uniform, and therefore the quality of a sand mould formed in an extrusion mode is guaranteed and improved.

Description

technical field [0001] The invention belongs to the technical field of metal casting process equipment. More specifically, the present invention relates to the technology of structural design of molding machine flasks for metal casting. Background technique [0002] In the metal casting molding machine, because the horizontal boxless molding technology has the advantages of high efficiency and less pollution, it is gradually being popularized and applied. However, due to the limitation of the structural principle, the modeling effect for the model with a large height difference is poor. [0003] The structure and shape of the current horizontal boxless molding machine are roughly similar, such as Figure 1 to Figure 3 shown. Among them, the bottom plate of the sand box used by the horizontal boxless molding machine is generally flat, such as figure 2 shown. [0004] Its specific structure and working method are: [0005] Such as figure 2 As shown, an upper flask bott...

AI Technical Summary

Problems solved by technology

[0009] When the sand mold is compressed, the general compression ratio must be about 30% to be compacted, but when the height difference of the model is large, after a certain stroke of compression of the planar sand box bottom plate, the sand mold compression ratio of the deep concave part will be higher than that of the convex part. much lower, resulting in poor build quality and even failure

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