Embedded Heat Pipe Casting to Prevent Deformation and Indentation
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Solution Overview
Problem
The existing methods for manufacturing cooling devices using heat pipes face challenges such as pipe damage from high temperatures during casting and indentation formation due to injection pressure, which affect the rigidity and durability of the final product.
Innovation Solution
A method involving a double-structured pipe with a meltable outer layer and a harder inner layer, where a support member is filled inside the pipe to prevent deformation and indentation, and a specific sequence of steps including preprocessing, filling, seating, injecting, cooling, and sealing is employed to ensure the pipe's integrity and airtightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a long hollow tube is used as a heat pipe in casting, then the cooling device can be manufactured, but the pipe may be deformed or destroyed due to limited rigidity during casting
Solution Approach 1:
The patent applies composite materials by combining a pipe made of meltable material with a support member made of non-meltable material. The support member provides structural reinforcement during the casting process, preventing pipe deformation while allowing the pipe material to melt and bond with the housing. This composite structure resolves the contradiction between ease of manufacture and pipe strength during casting.
2Strength
If a support member is filled inside the pipe to prevent deformation, then pipe rigidity is improved, but the support member may generate indentations on the inner wall due to injection pressure
Solution Approach 1:
The patent changes the material parameter of the support member by selecting a material with appropriate hardness characteristics. The support member is made of a material that is softer than the pipe material, allowing it to deform slightly under injection pressure rather than creating hard indentations on the pipe inner wall. This parameter change resolves the contradiction between providing structural support and maintaining surface quality.
3Ease of manufacture
If a meltable material is used for the pipe to enable casting, then the pipe can be integrated with housing, but the pipe may be damaged by high temperature of the melt
Solution Approach 1:
The patent applies preliminary action by pre-positioning the support member inside the pipe before casting. The support member is installed in advance to provide protection and structural integrity during the high-temperature melting and injection process. This preliminary protective measure ensures pipe reliability while still allowing the meltable pipe material to be integrated with the housing through casting.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively prevents pipe damage and indentation, ensuring the production of sturdy and airtight cooling devices with improved rigidity and durability, while maintaining cost-effectiveness by using materials with optimized melting points and hardness.
Implementation Method 1
a predetermined support member is filled inside a pipe to prevent deformation of the pipe by a pressure of a melt being injected
Implementation Method 2
the melt is injected into the cavity to surround the pipe
Implementation Method 3
the injected melt is cooled and a molded product formed by the melt being cooled is withdrawn
Implementation Method 4
the pipe is sealed
Data Source
AI summary
The present invention relates to a method of manufacturing a cooling device using a heat pipe in which, using casting, the heat pipe is embedded inside a housing, and the method includes a filling step in which a predetermined support member is filled inside a pipe to prevent deformation of the pipe by a pressure of a melt being injected into a cavity of a mold that is closeable, a pipe seating step in which the pipe filled with the predetermined support member is seated in the cavity, a melt injecting step in which the melt is injected into the cavity to surround the pipe, a cooling and withdrawing step in which the injected melt is cooled and a molded product is withdrawn, an injecting step in which a working fluid is injected into the pipe through an injection end, and a finishing step in which, after the injecting step, the pipe is sealed.