Production technology for casting thin-wall cookware through using precoated sand hot box method

Abstract

The invention discloses a production technology for casting a thin-wall cookware through using a precoated sand hot box method, and relates to the technical field of casting technologies of thin-wall cookware. The production technology comprises the steps of: 1, manufacturing a hot box die according to the shape of the cookware, wherein a negative pressure pumping structure is arranged on the die; and mounting the hot box die on a core shooter; 2, shooting precoated sand into the hot box die, and curing the precoated sand in the hot box die for forming by electrically heating; 3, splicing the die, and removing a die plate in the middle, and then closing the die; 4, pouring molten iron while the negative pressure is pumped after the die is closed; and 5, cooling a casting, and splicing the die to obtain the thin-wall cookware. According to the production technology, the process of pumping the negative pressure is carried out through the core shooter, and the pouring is synchronously carried out at the same time, so that the die does not needed to be removed for pumping the negative pressure and pouring, the formation of the cookware is sped up, and the operation steps are decreased, and therefore, the working efficiency is improved, and benefits are provided for casting the thin-wall cookware.

Description

technical field [0001] The invention relates to the technical field of casting technology of thin-walled castings, in particular to a production process for casting thin-walled cookware by a sand-coated hot core box method. Background technique [0002] Cast iron cookware is a utensil used to process food raw materials into edible items by cooking, steaming, boiling, frying and other means in daily life. Cast iron cookware is mostly cast by traditional casting methods. The process of traditional casting cookware is roughly the following steps: first, make a mold according to the appearance of the cookware; then, solidify the molding sand in the mold; second, pour the mold with molding sand; finally, The molded cooker is obtained after the mold is split. The following problems exist in the above process: (1) Generally, clay sand is used as molding sand. The clay sand has low strength and unstable size, and it is difficult to guarantee the shape, size and quality of the cast ...

AI Technical Summary

Problems solved by technology

The following problems exist in the above process: (1) Generally, clay sand is used as molding sand. The clay sand has low strength and unstable size, and it is difficult to guarantee the shape, size and quality of the cast iron cookware produced.

(2) Clay sand has low refractoriness, which is easy to cause defects such as sticky sand and sand holes

(3) The production process of manual clay sand is dusty, the working conditions of workers are poor, and the production efficiency is low

(5) Pouring without negative pressure, thin-walled castings are difficult to form

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