Induction Heated Non-Metallic Mold for Fast Curing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing compression molding processes are inefficient due to long cycle times and high energy consumption required for heating large metallic molds, which increases costs and reduces productivity.
Innovation Solution
The use of induction heated molds made from non-metallic materials, such as 3D printed polyetherimide, with embedded metallic channels filled with materials like iron filings, which are heated using electromagnetic induction to cure parts more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional heated metallic molds are used in compression molding, then the mold structure is simple and durable, but the heating time is long and energy consumption is high
Solution Approach 1:
The patent replaces traditional thermal conduction heating with electromagnetic induction heating. Induction coils generate an electromagnetic field that directly induces eddy currents in the metallic channels, converting electromagnetic energy directly into heat within the mold structure, eliminating the need for external heated platens and reducing heating time and energy consumption
Solution Approach 2:
The patent divides the mold into two distinct materials: non-metallic mold body for structural integrity and metallic channels for induction heating. This segmentation allows the metallic channels to be selectively heated by induction while the non-metallic body provides insulation and structural support, enabling localized and efficient heating
2Loss of time
If traditional thermal conduction heating is used, then the heating process is simple, but the cycle time is long
Solution Approach 1:
The patent embeds metallic heating channels within the non-metallic mold body, creating a nested structure where the channels are integrated into the mold cavities. This allows the heating elements to be positioned directly within the mold structure, enabling rapid and uniform heat distribution throughout the material being cured
Solution Approach 2:
The patent uses a composite mold structure combining non-metallic materials (for insulation and structural support) with metallic channels (for induction heating). This composite design enables the mold to respond rapidly to induction heating while maintaining structural integrity and thermal insulation
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 method significantly reduces the time, energy, and cost associated with curing parts, as the induction heating system rapidly and uniformly heats the metallic channels, enhancing the efficiency of the compression molding process.
Implementation Method 1
an electro-magnetic field is generated across the tooling using induction coils. The electro magnetic field (EMF) heats a metallic material contained in channels formed in the tooling
Implementation Method 2
The heat is conducted through the platen, into the metallic mold and then into the polymer to cure it
Data Source
AI summary
A method of curing a part in a mold using induction heated tooling is provided. In preferred embodiments, the method comprises placing a material that may be cured with pressure and heat in tooling made from a non-metallic material wherein the tooling includes a mold cavity that forms the part. Creating an electro-magnetic field across the tooling using induction coils. Applying pressure to the tooling and heating a metallic material contained in channels formed in the tooling around the mold cavity of the part.