Biodegradable Tooling System for Complex Profiles and Integrated Inserts
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Solution Overview
Problem
Current methods for processing biodegradable materials, such as polystyrene foam, lack efficient tools and processes for forming complex profiles and integrating inserts, limiting their application in packaging and transportation.
Innovation Solution
A tooling system comprising a base, press, and mandrel is used to thermoform starch-based biodegradable materials, allowing for the formation of components with predetermined profiles and integrated inserts, such as hot melt adhesives or pre-fabricated items, by applying heat and pressure to create pockets and specific shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional processing methods are used for biodegradable materials, then the materials can be processed with simple tools, but the ability to form complex profiles and integrate inserts is limited
Solution Approach 1:
The tooling system is divided into separate functional components: a base with cavity, a press with heating element, and a mandrel with insert holder. This segmentation allows each component to perform its specific function efficiently while maintaining overall system versatility for forming complex profiles and integrating inserts
Solution Approach 2:
The tooling system is designed to perform multiple functions: heating the biodegradable material, applying pressure to form complex profiles, and simultaneously integrating inserts into the workpiece. The base cavity and press configuration enable versatile shaping capabilities, while the mandrel system provides universal insert integration across different workpiece designs
2Object-affected harmful factors
If starch-based biodegradable materials are used, then environmental sustainability is improved, but the materials require specialized thermoforming processes
Solution Approach 1:
The process utilizes controlled parameter changes by heating the starch-based biodegradable material to specific temperatures that enable thermoforming. The press applies controlled pressure at these elevated temperatures to shape the material, then allows cooling to set the final form. This parameter control makes the material more formable while preserving its biodegradable properties
Solution Approach 2:
The thermoforming process exploits phase transitions of the starch-based material. Heating transforms the material from a rigid state to a more pliable state where it can be shaped, and subsequent cooling reverses this transition to lock in the desired profile. This phase transition approach enables complex shaping while maintaining ease of manufacture through controlled thermal processing
3Adaptability or versatility
If inserts are integrated into the workpiece during forming, then product functionality is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
Inserts are prepared in advance and positioned on the mandrel before the forming process begins. The mandrel acts as a pre-positioning fixture that holds inserts in their final intended locations. When the biodegradable material is pressed onto the mandrel, the inserts are automatically integrated into the workpiece at the correct positions, eliminating the need for separate assembly steps and reducing overall process complexity
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 enables the production of biodegradable components with customized profiles and integrated inserts, enhancing their functionality and suitability for packaging and transportation applications while ensuring environmental sustainability.
Implementation Method 1
The press and the base are heated
Implementation Method 2
The initial workpiece is pressed into the first cavity using the press
Data Source
AI summary
An example tooling system for processing a workpiece includes a base, disposed about an axis. A press is axially aligned with the base. The press defines a pressing surface. A mandrel extends along the axis from the base toward the press. The mandrel is disposed at least partially in a first cavity defined by one of the base or the press. The first cavity defines a profile different from the workpiece and is arranged to receive the workpiece. The mandrel is arranged to be inserted into at least one pocket in the workpiece.