Handheld Pneumatic Compaction Device for Composite Laminates
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Solution Overview
Problem
Current compaction techniques for composite materials, such as Carbon Fiber Reinforced Polymer (CFRP) parts, are time-consuming and labor-intensive due to the need for sealing vacuum bags, which hampers efficient processing of small laminates.
Innovation Solution
A handheld pneumatic and/or electromagnetic compaction device that grips a mandrel using magnetic forces and applies pneumatic pressure to compact laminates without a vacuum bag, maintaining static equilibrium between gripping and compressive forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If vacuum bag sealing is used for compaction, then compaction pressure can be applied to the laminate, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
The patent extracts and eliminates the vacuum bag sealing step from the traditional compaction process. Instead of using a vacuum bag that requires time-consuming sealing operations, the invention applies compaction pressure directly to the laminate through a simplified mechanism, removing the problematic sealing step entirely while maintaining effective compaction.
Solution Approach 2:
The compaction process is segmented into discrete, quickly-executable steps. Rather than a continuous vacuum sealing process, the invention uses separate, rapid positioning and pressing actions that can be performed in quick succession, significantly reducing the overall time required for the compaction operation.
2Stress or pressure
If vacuum bag sealing is used for compaction, then the laminate can be compacted, but the process becomes labor-intensive
Solution Approach 1:
The patent removes the complex vacuum bag sealing operation from the process, replacing it with a simple direct-pressure application method. This extraction of the problematic sealing step dramatically simplifies the operational procedure, making the compaction process less labor-intensive and easier to perform.
Solution Approach 2:
Instead of using suction (vacuum) to achieve compaction, the invention inverts the approach by applying direct positive pressure to the laminate. This inversion eliminates the need for sealing operations and creates a simpler, more straightforward pressing action that is easier to perform.
3Stress or pressure
If traditional vacuum bag method is used, then compaction can be achieved, but it is not suitable for complex geometries
Solution Approach 1:
The patent applies local quality by using a pressure application mechanism that can be customized or adjusted for different geometric regions of the laminate. The pressing surface or tooling can be shaped to match specific geometric features, allowing effective compaction of complex geometries that would be difficult to accommodate with a universal vacuum bag approach.
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 labor and time required for compacting small laminates, enabling faster and more efficient processing of composite parts by eliminating the need for vacuum bag sealing and allowing for compacting of complex geometries.
Implementation Method 1
grip a mandrel or other forming tool via the application of magnetic force
Implementation Method 2
shape a laminate onto the mandrel by applying pneumatic pressure to the laminate
Data Source
AI summary
Systems and methods are provided for compacting laminates. One embodiment is a method for compacting a laminate onto a surface of a forming tool. The method includes placing the laminate onto the forming tool, disposing a compaction device over the laminate, gripping the compaction device to the forming tool, compacting the laminate with a pressure foot of the compaction device, and removing the compaction device from the forming tool.