Method for internally arranging steel wire without exposure in manufacturing process of long and thin sand core

Abstract

The invention discloses a method for arranging a steel wire without exposure in the manufacturing process of a long and thin sand core. The method comprises the following steps: step 1, prefabricating three step-shaped hanging needles according to the actual core manufacturing requirement; and 2, the prefabricated hanging needles are sequentially installed in the core box cavity, the hanging needles have certain offset compared with the steel wires, and therefore the steel wires can be extruded more appropriately according to needs, and the positions of the steel wires are controlled. The method has the beneficial effects that the three hanging needles are arranged in the cavity in the static core box of the sand core in advance in an offset manner, so that a steel wire can be arranged in the center of the cavity of the core box in a suspended and limited manner, the steel wire can be completely wrapped after the sand core is formed, and the steel wire is located in the center of the formed sand core; the exposure of the steel wire after the sand core is formed and the excessive deviation of the steel wire relative to the center of the sand core after the sand core is formed are avoided, the forming quality of the sand core is greatly improved, and the rejection rate during casting machining is further reduced.

Description

technical field [0001] The invention relates to the technical field of casting mold design and core making technology, in particular to a method for embedding steel wires without exposure during the production of slender sand cores. Background technique [0002] In the process of making the casting sand core, in order to ensure that the sand core used for casting has a certain strength and is not easy to break, when manufacturing the sand core, it is necessary to build a steel wire in the center of the sand core, so as to avoid the casting of the casting being scrapped due to the fracture of the sand core. [0003] At present, the method of building steel wire in the sand core is to put the corresponding shape of steel wire directly into the core box for making the sand core, then shoot the sand, solidify, and finally take out the sand core from the core box, and the steel wire is built into the sand core. , using this method to place the steel wire in the sand core, the ste...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned technical defects and application requirements, the present invention proposes a method for built-in steel wires without exposure during the production process of slender sand cores, aiming at solving the problem of the existing methods of built-in steel wires in sand cores, which are easy to expose or offset the steel wires , and the production of castings with exposed or offset sand cores will cause the steel wires to melt and stick to the castings, and the sand cores will break, which will affect the quality of the castings and even cause the castings to be scrapped.

Images