Automatic aligning device for iron-type sand shooting hole cleaning ejection rods

Abstract

The invention discloses an automatic aligning device for iron-type sand shooting hole cleaning ejection rods. The device comprises ejection rods. The device is characterized by also comprising a front ejection rod plate, a rear ejection rod plate and a spring, wherein the front ejection rod plate and the rear ejection rod plate are arranged in parallel; a strut is arranged between the front ejection rod plate and the rear ejection rod plate; a bolt penetrates through the rear ejection rod plate, the strut and the front ejection rod plate to fix the front ejection rod plate and the rear ejection rod plate; the front ejection rod plate is provided with a plurality of ejection rod holes, an ejection rod is arranged in each ejection rod hole, the ejection rods correspond to iron-type upper sand shooting holes one by one, the diameter of each ejection rod hole is greater than that of the main body of each ejection rod and smaller than that of the tail of each ejection rod, and a gap is reserved between each ejection rod hole and each ejection rod; a spring pit is formed in the tail of each ejection rod, a spring is arranged in each spring pit, one end of each spring is fixed in the spring pit, and the other end of each spring is in contact with the rear ejection rod plate; and the head of each ejection rod is conical. The device can prevent the ejection rods from being bent or broken in the iron-type sand-lined casting production process, and can meet the mechanized production requirement of iron-type sand-lined casting.

Description

technical field [0001] The invention relates to a device for automatically aligning ejector pins for cleaning iron-type sand shooting holes. Background technique [0002] Sand-covered iron casting is one of the special castings. The casting mold is formed by covering the inner cavity of a metal mold with a thin layer of coated sand. The metal mold is called an iron mold. In the production process of sand-covered iron mold casting, the sand-coated layer on the iron mold is covered by the sand-shooting molding machine on the inner cavity of the iron mold through the sand-shooting holes of the iron mold. After the molten iron is poured, a considerable part of the residual sand remains in the iron mold without collapsing on the sand shooting hole of the iron mold. In this way, when the next iron mold is sand-covered, the residual sand must be removed. The cleaning of the sand shooting hole is mainly to make the sand shooting hole and the inner cavity of the iron mold unimpeded...

AI Technical Summary

Problems solved by technology

However, in the actual production process, there are many sand shooting holes on each pair of iron molds. When processing the sand shooting holes, the positions of the sand shooting holes of each iron mold may be slightly different. The 1' thread of the ejector rod is fixed on the ejector rod On the plate 3', if there is a deviation between the position of the iron-type sand shooting hole 2' and the position of the ejector rod 1', the ejector rod 1' touches the iron-type sand shooting hole 2' when it is pressed down, and the ejector rod 1' is easy to press under the action of pressure. Bending or breaking of the top will cause production to be stopped and the replacement of the ejector pin will be affected, and it is also uneconomical

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