A sand casting core making process

Abstract

The invention discloses a sand casting core-making process in the technical field of sand core manufacturing. The specific steps of the process are as follows: Step 1: Stir and mix the casting sand and binder evenly and thoroughly; Casting sand is injected into the mold. Step 3: Start the compaction device to compact the casting sand in the mold. Step 4: After the compaction is completed, take out the sand core and dry it; by setting the rotating disc, the two-way rack drives the rotating disc when it moves up and down Synchronous movement, the rotating disc will rotate along the inner threaded pipe while moving up and down, so as to drive the compaction hammer to rotate while moving up and down. The casting sand has a certain impact force and plays the role of compaction. When the compaction hammer is lowered, it rotates and twists and compacts the casting sand falling into the mold. On the one hand, the casting sand is compacted, and on the other hand, the casting sand is Squeeze all around to ensure that the casting sand can fill the corners of the mold.

Description

technical field [0001] The invention relates to the technical field of sand core manufacturing, in particular to a sand casting core making process. Background technique [0002] The cores used in sand casting are generally dry cores. According to the binder used in the core, the core is divided into clay sand core, oil sand core and resin sand core. The oil sand core is made of core sand with dry oil or semi-dry oil as the binder. The core is widely used. The viscosity of the oil is low, the fluidity of the mixed core sand is good, and it is easy to compact when making the core. However, the strength of the newly made core is very low, and it is generally accepted by a profiling core plate, and then baked in an oven for several hours to oxidize the oil with air to harden it. [0003] In the invention case of a sand casting core making process disclosed in the prior art, the Chinese patent application number of the invention patent is CN202010132142.9, a sand casting core...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a sand casting core-making process to solve the above-mentioned background technology. During the production process of the special-shaped sand core, the casting sand is not easy to fill into various positions of the mold, resulting in voids in the mold after compaction. , so that the produced sand core is incomplete and cannot be used for sand casting

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