Sand mold and sand core inner movable block drafting device

Abstract

The invention relates to a sand mold and sand core internal movable block draft apparatus, which comprises a support frame, a lever rotation mechanism and a sliding block lifting mechanism, wherein the support frame comprises a guide rod and a support plate with an inner threaded through hole, the support plate is fixed on the top end of the guide rod, the lever rotation mechanism comprises a manual crank and a rotation screw, the manual crank is arranged on the upper end of the rotation screw, the external threads of the threaded section of the rotation screw are matched with the inner threads of the support plate, the sliding block lifting mechanism comprises a sliding block sleeved on the guide rod and a pressure adjustment device for being placed between the sliding block and the sand mold or sand core, and the bottom surface of the sliding block is provided with a downward projecting projection block. The sand mold and sand core internal movable block draft apparatus has the following beneficial effects that: force applying on the mold moveable block is uniform, drafting is stable, the sand mold, the sand core and the mold are not damaged, and quality requirements of the movable block drafting process are met; the labor is saved, and manual operation is easily achieved; and the movable block draft apparatus has advantages of high production efficiency, less investment, and no requirement of assistance of assisted staffs.

Description

technical field [0001] The invention relates to a sand mold and a sand core inner movable block drafting device. Background technique [0002] The movable block structure of the casting mold is widely used in sand casting. For some movable blocks with special structures, the friction resistance of the draft is often large. Mold damage. [0003] At present, most of the drafting devices of sand casting molds are designed for sandboxes or formwork molds, and there are few devices that can smoothly and easily extract mold blocks. The drafting methods (including special devices or equipment) of existing sand casting mold loose blocks mainly contain the following types: manual pulling loose blocks method, screw rod pulling loose block method, driving pulling loose block method and so on. [0004] The manual drafting method is a method in which the operator uses his own hands to grab the movable block inside the core. It is only suitable for the movable block with simple structur...

AI Technical Summary

Problems solved by technology

Its advantage is that the drafting tool is simple, but the disadvantage is that it is easy to damage the type, core and mold, and requires the operator to have certain drafting skills

[0006] The method of pulling loose blocks by driving is that the drawing process of the loose blocks inside the mold and core cannot be completed by ordinary methods. A series of lifting devices or equipment such as driving, hanging chains, and hooks must be used to complete the working method.

Its advantages are large drafting force, no need to shake the movable block vigorously during drafting, and the drafting process is stable. The disadvantages are low work efficiency, requirements for the drafting direction (vertical upward), high equipment cost, and high energy consumption. , in addition, it is necessary for the driver to cooperate with the operation

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