Hollow mandrel whole sand core casting mold for super long hollow camshaft

A technology of casting molds and camshafts, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of low strength and rigidity, long length, sand inclusion defects in hollow mandrels, etc., to ensure strength and rigidity, and facilitate Exhaust effect

Inactive Publication Date: 2017-06-13
十堰宏兆汽配实业有限公司
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Problems solved by technology

However, it is difficult to cast an ultra-long hollow combined camshaft with a length of more than 60 cm, mainly because in the process of casting the hollow mandrel, the casting mold needs to use a resin sand integral sand core, and in the casting cavity, it is only supported from both

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  • Hollow mandrel whole sand core casting mold for super long hollow camshaft
  • Hollow mandrel whole sand core casting mold for super long hollow camshaft

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[0011] Combine figure 1 , figure 2 As shown, the present invention is further described as follows: Hollow mandrel integral sand core casting mold for ultra-long hollow camshaft, including upper mold (not shown in the figure), lower mold 1, resin sand integral sand core 2, cold iron 3, upper mold The cavity of the mold and the cavity of the lower mold 1 are combined to form a hollow mandrel cavity, the resin integral sand core 2 is placed in the lower mold, the chilled iron 3 is set at the cam position of the hollow mandrel cavity, and one end of the resin sand integral sand core 2 Axial positioning core head 5 and radial positioning core head 4 are provided. The resin sand integral sand core 2 is provided with a central exhaust hole 6, and the resin sand integral sand core 2 is fitted with 4 core supports at certain intervals along the length direction. 3. The material used for the core support is 45 gauge steel with nickel plating. The core support extends 3 supporting arms ...

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Abstract

The present invention proposes a hollow mandrel integral sand core casting mold for an ultra-long hollow camshaft, which includes an upper mold, a lower mold, and a resin sand integral sand core. There are multiple core supports set at certain intervals along the length direction. The core supports protrude 3-5 support arms along the circumferential direction. There is a cold iron. When pouring with the present invention, the resin sand integrated sand core is supported by the core support to ensure strength and rigidity, and will not loosen and break. Further, the core support on the resin sand integral sand core is melted and integrated with the hollow mandrel, thereby ensuring Casting of hollow mandrel; the integral sand core of resin sand is provided with a central vent hole to facilitate the venting of the cavity. The invention changes the positioning mode of the integral sand core in the lower mold cavity, thereby realizing the hollow mandrel casting of the super-long hollow camshaft, and controlling the reject rate within 3%.

Description

technical field [0001] The invention relates to the technical field of engine camshaft manufacturing, in particular to an integral sand core casting mold for an ultra-long hollow camshaft. Background technique [0002] The camshaft is one of the five core parts of the automobile engine. The traditional manufacturing method of the camshaft of the automobile engine mainly adopts the integral casting or integral forging of the camshaft blank, and then cuts it for production. Cast camshafts mainly include chilled cast iron, chilled nodular cast iron, etc., which are the main production forms of automotive camshafts at present. [0003] In the prior art, the mainstream manufacturers of gasoline engines mainly use cast camshafts, which are generally solid type due to technical reasons. The performance of the camshaft is mainly guaranteed by the material of the cam working surface. As long as the connecting shaft has a certain bending strength, it can meet the requirements without...

Claims

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Application Information

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IPC IPC(8): B22C9/24B22C9/02B22C9/10
Inventor 杨善华许连鹏张玉斌
Owner 十堰宏兆汽配实业有限公司
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