A shrink tube mold

Abstract

The invention relates to a tube shrinkage mold. The tube shrinkage mold comprises a bottom plate, a support, a forming mold, a mold release mechanism and a pressing mechanism. The support comprises at least three struts and a top plate. The lower ends of the struts are fixed to a bottom plate, and the upper ends of the struts are connected with the top plate. A through hole is formed in the center of the top plate. The tube shrinkage mold is characterized in that a vertical hole is formed in the center of the forming mold, all points on the upper section of the vertical hole are equal in hole diameter, and a first conical hole with the upper portion smaller than the lower portion is formed in the lower section of the vertical hole. The pressing mechanism comprises an upper pressing plate and a lower pressing plate, and cushion plates are arranged below the upper pressing plate. The lower sides of the two cushion plates are placed on the lower pressing plate. A cross arm plate is arranged between the two cushion plates, first rod holes and ejector rods are arranged on the upper pressing plate, and the lower ends of the ejector rods are arranged on the cross arm plate. The lower pressing plate is arranged on the mold. Two guide rods are arranged between the lower pressing plate and the top plate, and the upper ends of the two guide rods are connected to the lower surface of the lower pressing plate. Second rod holes are formed in the top plate. The lower ends of the two guide rods stretch into the second rod holes in a sliding mode. Through the tube shrinkage mold, the production cost can be reduced, and the production efficiency can be improved; the tube shrinkage mold is suitable for reduction of the diameter of the ends of metal tubes.

Description

technical field [0001] The invention relates to a mold. Specifically, it is a shrinking die used to reduce the diameter of the end of a metal pipe. Background technique [0002] In some special occasions, the diameter of one or both ends of the metal pipe is required to be smaller than its middle section. At present, the method for reducing the diameter of the metal tube end is to use a traditional shrinking die to hot-extrude one end of the metal tube with the same diameter at each point in the longitudinal direction. Wherein the pipe shrinking mold comprises a base plate, a top plate, a molding die, a demoulding mechanism and a pressing mechanism, a lower die is fixed in the middle of the upper surface of the base plate, a vertical center hole is arranged on the lower die, and the diameters of each point in the lower section of the center hole are equal, The upper part of the center hole is a tapered hole with a small bottom and a big top, and the diameter of the upper p...

AI Technical Summary

Problems solved by technology

Although the above mold can be used to reduce the caliber of the metal pipe, it requires two oil cylinders, the pressing oil cylinder and the demoulding oil cylinder. Many oil cylinders are required, and the equipment investment is large, which makes the production cost high.

And because there is no positioning plate between the upper mold and the lower mold to prevent the deformation of the shrunk metal tube, the shrunk metal tube is easily bent and deformed during the shrinking process. In this way, a shaping mold is required, which not only requires many process steps, but also reduces production efficiency.

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