Combinable neck-down core

Abstract

The invention relates to a combinable neck-down core. A metal neck-down core assembly is cooperatively arranged on a sand mold neck-down core assembly, a round counterbore is formed in the middle of the upper surface of a sand mold neck-down core body, a funnel-shaped through hole is formed in the sand mold neck-down core body, and the round counterbore and the funnel-shaped through hole in the sand mold neck-down core body are coaxially formed. A funnel-shaped riser is fixedly arranged on the lower surface of an annular connecting piece. The inner diameter of the upper portion of the funnel-shaped riser is overlapped with the inner diameter of the annular connecting piece. The annular connecting piece on the metal neck-down core, the lower surface of the funnel-shaped riser and the roundcounterbore and funnel-shaped through hole in the sand mold neck-down core body are attached to one another. The combinable neck-down core has the beneficial effects that the combinable neck-down corehas a heat preservation function so that riser burning is avoided during static pressure modeling, the combinable neck-down core cannot be damaged by high-pressure impact when used on a high-pressuremodeling line, and the combined neck-down core can be universal on a static-pressure modeling line and the high-pressure modeling line.

Description

technical field [0001] The invention relates to an easy-cut sheet, in particular to a combinable easy-cut sheet. Background technique [0002] In order to facilitate the separation of the casting riser and the casting body, prevent the casting body from being damaged when separating the casting riser and the casting body, and at the same time, in order to facilitate the processing of the casting body after casting and reduce the workload of post-casting processing, the casting riser An easy-cut sheet is set between the lower end and the casting cavity. At present, the existing sand-type easy-cut sheet is only suitable for the static pressure molding line, and the metal easy-cut sheet is used on the static pressure molding line. The metal easy-cut sheet does not have the function of heat preservation , the metal easy-cut sheet dissipates heat too quickly, which is easy to cause the riser to live. Use the sand-type easy-cut sheet on the high-pressure molding line. The sand-typ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a combinable easy-cut sheet, which solves the problem that the existing sand-type easy-cut sheet can only be applied to the static pressure molding line, and the metal easy-cut sheet is used on the static pressure molding line. The cutting sheet does not have the function of heat preservation. The metal easy-cutting sheet dissipates heat too quickly, which is easy to cause the riser to live. Use the sand-type easy-cutting sheet on the high-pressure molding line. The sand-type easy-cutting sheet is easily damaged by high-pressure impact. The problem that the sheet cannot be used universally on the corresponding static pressure molding line and high pressure molding line

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