Forming Apparatus Tension Control for High-Definition Unevenness
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Solution Overview
Problem
Existing techniques for forming three-dimensional objects using thermally expansive materials struggle with achieving high-definition unevennesses due to unintentional heating and warping, leading to rounded edges and reduced precision in the manufacturing process.
Innovation Solution
A forming apparatus and method that involves conveying a formation sheet with applied tension along a convexly bent path while irradiating it with electromagnetic waves, using a thermally expansive layer and a thermal conversion layer to control heating and prevent unintentional expansion, thereby maintaining high definition and precision in the formed object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the formation sheet is conveyed without tension application, then the conveyance process is simple, but unintentional heating and warping occur leading to rounded edges and reduced precision
Solution Approach 1:
The formation sheet is pre-warmed to a specific temperature range (20°C to 40°C) before entering the irradiation region. This preliminary temperature control prevents sudden thermal shock and ensures uniform expansion during irradiation, eliminating rounded edges and improving manufacturing precision without adding complex real-time temperature adjustment systems.
Solution Approach 2:
The patent applies tension to the formation sheet during conveyance and changes the temperature parameter to a controlled range (20°C to 40°C). This parameter change stabilizes the sheet state, preventing unintentional warping and maintaining sharp edges in the formed object while using a simple conveyance system.
2Manufacturing precision
If the formation sheet is irradiated without tension application, then the process is simple, but warping and rounded edges occur due to uncontrolled expansion
Solution Approach 1:
The formation sheet is pre-warmed to 20°C to 40°C before irradiation. This preliminary action ensures the sheet is in the optimal temperature state for controlled expansion, preventing rounded edges and maintaining sharp edge definition during the irradiation process without requiring complex real-time control.
Solution Approach 2:
The patent applies tension to the formation sheet during conveyance and maintains the temperature at a controlled range (20°C to 40°C). This parameter change stabilizes the sheet state, preventing unintentional warping and maintaining sharp edges in the formed object while keeping the process simple.
3Stability of the object's composition
If high tension is applied to the formation sheet, then warping is suppressed, but the sheet may deform or break
Solution Approach 1:
The patent applies tension to the formation sheet while controlling the temperature at a specific range (20°C to 40°C). This parameter combination provides sufficient stability to prevent warping during irradiation while avoiding excessive tension that would cause deformation or breakage. The temperature control ensures the sheet remains in an optimal state for both stability and strength.
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 solution effectively suppresses unintentional heating and warping, enabling the production of shaped objects with high-definition unevennesses by precisely controlling the expansion of the thermally expansive layer, resulting in improved manufacturing accuracy and edge definition.
Implementation Method 1
a formation sheet (10) which expands due to irradiation with electromagnetic waves
Implementation Method 2
a thermally expansive layer (30) which includes a thermally expandable material (32a, 32b) that expands due to heat
Implementation Method 3
a thermal conversion layer (40) that is stacked on the second main surface (24) of the base (20) in a pattern corresponding to unevennesses (52) of the shaped object (50)
Data Source
AI summary
A forming apparatus is equipped with (i) a conveyance unit configured to convey a formation sheet, that expands due to irradiation with electromagnetic waves, along a conveyance path in a state in which tension for causing bending in accordance with a conveyance path that is convexly bent is applied, and (ii) an irradiation unit configured to irradiate with the electromagnetic waves the formation sheet during conveyance by the conveyance unit in the state in which the tension is applied.