Hot runner oil cylinder cooling structure and mounting method thereof

Abstract

The invention discloses a hot runner oil cylinder cooling structure and a mounting method thereof. The hot runner oil cylinder cooling structure comprises an injection molding machine back plate and aconnecting plate which is connected with the injection molding machine back plate and used for arranging a hot runner, wherein the connecting plate is provided with an oil cylinder body hole used forcontaining a hot runner valve needle; a first cooling fin assembly is arranged between the oil cylinder body hole and the side wall of an oil cylinder body; and a second cooling fin assembly is arranged between the top face of the oil cylinder body and the injection molding machine back plate. According to the structure, the oil cylinder body hole in the connecting plate and the space between theoil cylinder body hole and the injection molding machine back plate are fully utilized, the problem of oil cylinder cooling is solved in the narrow space, and the problem of oil cylinder cooling after a water cooling system loses efficacy is solved. The structure that two cooling components are elastically attached is adopted in the second cooling fin assembly, on one hand, heat transfer is achieved, more importantly, the problem of how to arrange the cooling components in the narrow space is solved, and the situation that the oil cylinder is extruded after assembling, and consequently the machining precision of the cooling components is reduced is avoided.

Description

technical field [0001] The invention belongs to the cooling technology of an injection molding structure, and in particular relates to a cooling technology of a hot runner of an injection mold. Background technique [0002] The needle-type hot runner of the injection mold is set on the connection plate connected to the back plate of the injection molding machine, and the valve needle is driven by the oil cylinder to control the opening and closing of the hot nozzle injection. Since the oil cylinder is located above the splitter plate, the oil cylinder is easily damaged due to high temperature radiation, so the hot runner system will be designed to cool the oil cylinder. Currently, water cooling is usually used. A cooling water plate is installed between the oil cylinder and the splitter plate, but due to space constraints, the maximum diameter of the flow channel in the cooling water plate can only be designed to be φ6mm under the requirement of ensuring the strength of the...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a hot runner oil cylinder cooling structure and its installation method for the problem that water cooling is prone to failure

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