Method of making metal molds

Abstract

The invention discloses a metal mold and a manufacturing method thereof and a metal mold casting apparatus. The metal mold is arranged on the metal mold casting apparatus and comprises a first half mold and a second half mold which are processed from low-carbon structural steel with a uniform metallic structure. The first half mold and the second half mold are respectively provided with, in correspondence, a cavity used for formation of the shape of a casting during casting, a cast gate, a runner, fixed supporting feet which can be fixedly connected to the metal mold casting apparatus and joint surfaces which fit each other during closing of the first half mold and the second half mold, wherein the cavity is a concave cavity matching with the shape of the external surface of the casting and accommodates a sand core used for defining the interior surface shape and wall thickness of the casting, and a positioning part used for positioning the relative position between the sand core and the cavity is arranged above the cavity. The metal mold prepared by using the manufacturing method provided by the invention can shorten casting time, realizes rapid filling and formation and improves yield.

Description

technical field [0001] The invention relates to the field of metal casting, in particular to a metal mold, a manufacturing method thereof, and metal casting equipment. Background technique [0002] Metal mold casting technology is a technology that has gradually emerged in recent years and is more and more widely used. It has high production efficiency, small production site area, low technical requirements for operators, easy to form mechanized assembly lines, and is suitable for large-scale batch production. [0003] The structure of the existing casting machine is relatively complicated, which is mainly reflected in the fact that the entire mechanical action is controlled by hydraulic and electric, and each machine is equipped with a hydraulic workstation with a large volume. In the past, it was mostly used for non-ferrous metal casting with lower temperature. It is used for casting high-temperature cast iron castings. The operating temperature and ambient temperature ar...

AI Technical Summary

Problems solved by technology

Used for high-temperature cast iron castings, high operating temperature and ambient temperature, resulting in high hydraulic oil temperature, easy damage to electrical accessories, high equipment failure rate, high hydraulic pipes are easily burned by splashed high-temperature molten iron

The hydraulic transmission is slow and the production efficiency is low

[0004] In addition, the metal mold with the existing structural form is used to produce thin-walled gray cast iron pipe fittings. Since molten iron is easy to cool and solidify during the casting process, the traditional horizontal casting method of castings in the cavity is often prone to incomplete filling of molten iron. When the cavity is solidified, there is a phenomenon that the molten iron solidifies quickly and the casting is insufficiently poured and the molding is difficult, resulting in waste products

[0005] In addition, in the existing traditional sand casting process, when casting pipe fittings, due to the yield of the molding sand, when the molten iron is pouring and filling the mold, under the action of gravity and the expansion and contraction of the molten iron solidification, the size of the casting varies in a large range. In order to ensure that the pipe fittings The minimum wall thickness requirement often increases the casting allowance of the casting size, which increases the casting cost

[0006] In addition, the heat-resistant billet processing metal mold materials currently used in metal molds are expensive and prone to thermal cracks, short service life, and high production costs. This restricts the promotion and application of metal mold casting technology.

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