Mold-drawing method and special device for v-casting manhole cover

Abstract

The invention discloses a mold-drawing method and a special device for V-method casting manhole covers. The method includes the following steps: ①Move the casting mold to the working position of the manipulator; The mechanisms are matched together; ③The manipulator remains in the original position. At this time, the connection between the air spring and the compressed air is disconnected. Box separation. ⑤ After the mold is removed, the manipulator lifts the mold to proceed to the next step, and the mobile vibrating table also returns to the laminating station to proceed to the next step. Compared with the existing ones, the ejection method of the present invention makes the ejection more convenient, and this ejection method is not only helpful for demoulding, but also beneficial for protecting the The molded EVA film greatly reduces the damage of the mask.

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. like 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 cloc...

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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