Method for rapping of V method casting well base well cover and special device

Abstract

The invention discloses a method for rapping of a V method casting well base well cover and a special device. The method comprises a first step of moving a casting mold to the working position of a mechanical hand; a second step of descending the mechanical hand to enable a mechanical hand box supporting mechanism to be matched with a sand box lifting mechanism; a third step of keeping the mechanical hand fixed in situ, disconnecting an air spring with compressed air, retracting the air spring, enabling the working plane of a moving plain jolter to descend along with the air spring, driving a die to descend together; a fourth step of separating the die and a sand box; a fifth step of utilizing the mechanical hand to lift the casting mold to enter a next process after the rapping is finished, enabling the moving plain jolter to return to a laminating station, and entering a next process. Compared with the prior art, the rapping method enables rapping to be more convenient; and due to the fact of original tiny deviation of the air spring in each direction horizontally, the rapping method not only is favorable for demolding, but also is favorable for protecting an EVA film of the casting mold and greatly reduces the damage to a facial film.

Description

technical field [0001] The invention relates to a mold-drawing method, in particular to a mold-drawing method for a V-method cast manhole cover and a special device thereof. Background technique [0002] Common sand casting methods mainly include ejector-type and flip-type. [0003] The ejector pin is suitable for sand molds with simple shape and small height. Such as figure 1 As shown, after the molding is completed in a certain way, the cylinder moves, and the four corners of the sand box are pushed up through the four ejector pins, while the template remains in the original position, thereby realizing mold removal. [0004] Flip the mold, such as figure 2 As shown, it is mainly suitable for sand molds with deep hanging sand or sand tables in the cavity. The principle of the flip-type lifting mold is that after the molding is completed in a certain way, such as figure 1 As shown in .3, the formwork fixed on the overturning plate and the sand box placed on it rotate c...

AI Technical Summary

Problems solved by technology

[0006] Generally speaking, for some molds with many deep cavities or ribs, it is difficult to remove the mold due to the friction between the mold and the EVA film during the mold removal, and the film is damaged after the mold is removed. After the mold is removed, the cavity needs to be observed manually. On the surface, workers need to use transparent glue to repair the damaged position, which increases the workload of workers and reduces the production efficiency.

Especially for manhole covers and well bases with many ribs and deep structures, since the manipulator can only have a degree of freedom in the vertical direction when the mold is pulled out, and there is no degree of freedom after positioning in the left and right directions, a small error when pulling the mold is very large. It is easy to cause damage to the EVA film

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