Thermoforming Aid With Curl-Resistant Element
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Solution Overview
Problem
Very thin thermoformable sheets used in thermoforming machines tend to curl, making their proper placement on the platen difficult and time-consuming, which affects the precision and efficiency of the thermoforming process.
Innovation Solution
The introduction of thermoforming aids comprising a thermoformable sheet and a curl-resistant element, where the curl-resistant element prevents curling by maintaining surface contact with the sheet and providing temporary adhesion to the platen, allowing for easier and faster sheet placement, and can be manufactured using lamination processes without adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a very thin thermoformable sheet is used, then the precision of the impression is improved, but the sheet curls making placement difficult and time-consuming
Solution Approach 1:
A release liner is introduced as an intermediary carrier that holds the thin thermoformable sheet in a flat state during placement. The liner acts as a mediator between the operator and the curling sheet, enabling easy positioning without direct handling of the unstable thin sheet. After placement, the liner is released and removed, leaving the sheet properly positioned for thermoforming.
2Manufacturing precision
If a very thin thermoformable sheet is used, then the precision of the impression is improved, but the time required for placement increases
Solution Approach 1:
The thin thermoformable sheet is pre-mounted onto a release liner before the thermoforming process begins. This preliminary action of attaching the sheet to the stable liner eliminates the time-consuming adjustments and repositioning that would otherwise be needed during the actual placement step, significantly reducing total placement time while maintaining precision.
3Ease of operation
If the sheet thickness is increased, then the ease of handling is improved, but the precision of the impression deteriorates
Solution Approach 1:
The invention utilizes the properties of thin films by mounting the thin thermoformable sheet onto a more stable release liner. The liner provides the structural support and handling stability of a thicker material, while the thin sheet itself maintains its ability to form precise impressions. This combination allows the system to enjoy the handling ease of thicker materials without sacrificing the precision benefits of thin sheets.
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
The use of thermoforming aids enables easier and quicker placement of thin sheets on thermoforming machines, improving the precision and efficiency of the thermoforming process by preventing curling and ensuring proper sheet positioning, thereby enhancing the quality of the formed impressions.
Implementation Method 1
providing temporary adhesion to the platen
Implementation Method 2
manufactured using lamination processes without adhesives
Data Source
AI summary
A thermoforming aid for use in creating a thermoformed impression of an object such as a dental arch. The thermoforming aid has a thermoformable sheet which has inherent tendency to curl when unsupported, and a curl-resistant element which prevents the thermoformable sheet from curling. The thermoforming aid makes a person's task of placing a sheet of thermoformable material, especially a very thin sheet having an inherent tendency to curl, in proper position in a thermoforming machine less difficult and time-consuming.