Investment mold structure for making internal undercut with rubber sleeve

Abstract

The invention discloses an investment mold structure for making an internal undercut with a rubber sleeve. The investment mold structure comprises a mold body; the mold body is composed of an upper mold and a lower mold and is correspondingly provided with penetrating fixed guide sleeves at four corners; the rubber sleeve is arranged between the upper mold and the lower mold; the two ends of the rubber sleeve are respectively provided with a right pulling core and a left pulling core; the left pulling core is correspondingly provided with a binding post; the right pulling core is correspondingly provided with a connecting trough; and the left pulling core and the right pulling core are fixed on the mold body through the threaded connection of the binding post and the connecting trough. According to the investment mold structure for making the internal undercut with the rubber sleeve provided by the invention, the design of three risers is adopted, and the three risers are respectivelylocated at the two ends and the middle, so that air holes are avoided due to the collection of internal air at the middle to affect the product quality, and the pouring efficiency is improved; the pulling cores on both sides adopt the design of thread and cushion pad, so that the firmness of the whole mold is greatly improved and the product accuracy is improved; and at the same time, the rubber sleeve is provided with a through hole for facilitating the hand grip deformation, so that the demolding efficiency can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of mold casting, in particular to an investment mold structure using rubber sleeves to make internal undercuts. Background technique [0002] Investment casting, also known as lost wax casting, includes processes such as wax pressing, wax repairing, tree formation, dipping, melting wax, casting molten metal and post-processing. Lost wax casting is to use wax to make a wax mold of the part to be cast, and then coat the wax mold with mud, which is the mud mold. After the clay mold dries, it is placed in hot water to melt the inner wax mold. Take out the clay mold that has melted the wax mold and bake it into a pottery mold. Once roasted. Generally, when the mud mold is made, the sprue is left, and then the molten metal is poured into the sprue, and after cooling, the required parts are made. [0003] The existing Chinese patent CN 110815722 A provides an investment mold structure using rubber sleeves to ma...

AI Technical Summary

Problems solved by technology

[0005] (2) The left and right cores are connected in a non-fixed way, which is easy to fall off, resulting in unstable overall structure and insufficient connection precision

[0006] (3) There is a connected inner ring inside the rubber sleeve, but it is difficult to pinch it tightly by hand, and there is still a problem that it is difficult to take it out, and it is not easy to demould

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