Although the foundry workers, such as more and more attention to study high-pressure, automatic, microseismic, blowing fire and other more advanced extrusion molding method, the real wind-driven shock-type molding machine is still widely used with, for different batches of medium and small castings production, they are still regarded as practical, reliable, economical casting machine, but the real shock-type molding machine for inherent defects (such as runout problems), but also continue to conduct research and improvement. Shengchang technical staff of the molding machine Rocker made a careful analysis of the phenomenon and put forward effective measures:
    First, the swing phenomenon reasons:
    Real shock-type molding machine fatal flaw is the deviation issue, the workers call it the swing. From the face of it, should be called Rocker molding machine, from the outcome point of view, should be called sand deviation. Molding machine table is due to the real process in shock lose their balance, resulting in sand in the sand box of the horizontal displacement, the lack of local sand compaction. If the earthquake actually occurs only during the vertical movement of the shock strength, rather than a horizontal direction of the runout force, then the department will naturally the same as other parts of sand to get proper compaction, on the contrary, if the actual process of the earthquake in, and the two forces exist, in addition to sand up and down the vertical compaction, there are horizontal movement, then the department will be the virtual sand. Now, let us analyze the main reason is present in the general under the direction of table movement is vertical, and repeated; stop supply of compressed air lift table a table while the exhaust a natural fall, this cycle in order to achieve the real purpose of the earthquake. workbench path does not appear to swing, but the real shock piston and shock the real question between the cylinder gap is too large, the movement will not table a vertical line, so that a cycle of wheat in shock, the point of movement points, movement in the vertical direction the distance, movement in the horizontal direction distance is. as the real shock molding machine cylinder amplitude, known as the swing bench swing. There is no doubt, real sand in the earthquake process, resulting in vertical movement and horizontal movement of the ratio is less than one. with this relationship, we can predict the molding machine for sand size swing shift caused by Ang.
   Second, the swing measures to explore the phenomenon:
   Since the molding machine's swing depends on the molding machine cylinder wall wear, then, do not shake from time to investigate what the real molding machine cylinder causes of increased wear and tear, according to the force of the earthquake analysis of solid cylinder, there are two reasons .1, shape real shock machine cylinder assembly tolerance is the maximum gap of 33 lines 0.355 as the real shock rely mainly on piston ring-cylinder sealing, air leakage, as long as the situation allows, ask gap could still be bigger volume 2, because the layout does not look like the board type are symmetrical appearance in the plate are often partial to one side of the position, as long as this phenomenon often, cylinder wall wear and tear will become even in here, we must remind you that, is to educate workers to overcome the habit of operating methods, often exchange template position, reducing the local cylinder cylinder wall wear.