Core machine ration sand adding method and device

Abstract

The invention discloses a core machine ration sand adding method and device. The ration sand adding method comprises the following steps of additionally arranging a sand adding moving mechanism between a sand adding butterfly valve and a sand spraying cavity which are arranged below a sand storing hopper, and arranging a sand position height sensor; during the adding of sand, filling the sand in a sand storing hopper by utilizing a sand mixing system, moving the sand adding moving mechanism to a sand adding position, and communicating an outlet of the sand adding butterfly valve and the sand spraying cavity; detecting the sand position height in the sand spraying cavity by utilizing the sand position height sensor, judging whether the sand needs to be added, if so, switching on the sand adding butterfly valve, meanwhile, detecting whether the sand position in the sand spraying cavity achieves the setting height by utilizing the sand position height sensor, if so, closing the sand adding butterfly valve, shifting out the sand adding moving mechanism, and finishing the sand adding. The core machine ration sand adding method and device provided by the invention have the advantages that the ration sand adding is realized, a proportion problem of sand quantity to airflow in the sand spraying cavity of a core machine is solved, the service life of a core box is prolonged, the device and the method are used for manufacturing a complex sand core, meanwhile, the method is simple, a sand adding device structure does not need to be changed, and the realization is easy.

Description

technical field [0001] The invention relates to metal casting equipment, in particular to a method for quantitatively adding sand to a core making machine and a sand adding device. Background technique [0002] Sand casting is a casting method in which molding sand is compacted into a mold, and is widely used in the production of cast iron and steel castings. Among them, the manufacture of sand core is an important process in sand casting. Sand cores are generally produced by a core making machine through a core box. The core making machine usually includes a frame, a sand feeding device, a sand shooting mechanism, an air blowing hood and a core box lifting mechanism. Among them, the sand feeding device generally includes a sand storage bucket and a sand feeding butterfly valve arranged above the injection cavity. Butterfly valve enters the sand adding cylinder. [0003] The existing fixed shooter type core making machine realizes adding sand by controlling the opening or...

AI Technical Summary

Problems solved by technology

However, this device is electronically called as a transition device for adding sand, and a reverse mechanism needs to be installed. At the same time, two butterfly valves for adding sand need to be installed, which has a complicated structure; the reverse mechanism is easily polluted by molding sand and fails to operate; The setting of the mechanism and the exposure of the sand-filling channel may easily lead to leakage or contamination of the molding sand; and, since the molding sand in the sand-shooting chamber may not necessarily be exhausted, adding sand by weighing the sand-filling method may lead to Sand spill

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