Core jig

Abstract

The invention relates to a core jig which is used for taking out a sand core from a core setting mould and feeding the sand core into a cavity on a pouring line, wherein the sand core comprises a sand core body; a positioning hole is formed at the top of the sand core body; multiple iron nails are inserted into the sand core body; the flat end of each iron nail is positioned at the upper part of the sand core body, and the sharp end of each iron nail penetrates through the lower part of the sand core body; the core jig comprises a frame, a fixing plate, a pushing plate, a driving mechanism and a locating pin; the fixing plate is connected to the frame; the pushing plate is positioned below the fixing plate and can slide up and down relative to the fixing plate; the driving mechanism drives the pushing plate to slide up and down relative to the fixing plate; the locating pin is arranged on the pushing plate and matched with the positioning hole; and the lower part of the pushing plate is provided with an electromagnetic attraction head which absorbs the sand core through the iron nails. The core jig provided by the invention can ensure that the sand core put in the cavity does not float upward without additionally using compaction stone for the sand core in the core setting process, is simple in structure and convenient to operate, and can be widely applied to the mechanical or automatic production line of batch production.

Description

technical field [0001] The invention relates to a core setting fixture. Background technique [0002] The core clamp is generally used to clamp the sand core and transfer the core accurately. At present, the core setting fixture in the prior art mainly includes a clamping part and a moving part for transferring the clamping part to core setting. When operating the core setting fixture, the clamping part first extends into the sand core mold to clamp the sand core, and then transfers the sand core to the cavity through the moving part. However, the core-setting fixture of this type of structure generally has the following defects: during the core-setting process, when the clamping part is pulled out from the sand core, the sand core will float up to a certain extent due to the upward pulling force of the clamping part. It is necessary to press the sand core in the cavity manually or with a compacting stone, which is complicated to operate and low in work efficiency; at the ...

AI Technical Summary

Problems solved by technology

However, the core-setting fixture of this type of structure generally has the following defects: during the core-setting process, when the clamping part is pulled out from the sand core, the sand core will float up to a certain extent due to the upward pulling force of the clamping part. It is necessary to press the sand core in the cavity manually or with a compacting stone, which is complicated to operate and low in work efficiency; at the same time, when the sand core is pressed, improper force will cause the sand core to break, which is the casting. Defects such as sand loss and pores, the accuracy is prone to deviation

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