Resin Support Tape Curing for Precise 3D Layer Alignment
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Solution Overview
Problem
Existing additive manufacturing processes face challenges in efficiently forming complex three-dimensional components with precise control over layer formation and material properties, particularly in tape casting methods where resin adhesion and layer alignment can be inconsistent.
Innovation Solution
The apparatus employs a movable stage and actuator assembly to control the position of resin layers, combined with a radiant energy device for precise curing, and includes features like non-stick coatings and pneumatic actuation zones to manage resin support movement and tension, allowing for the formation of complex components with controlled layer thickness and material composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tape casting process is used to form resin layers, then layer-by-layer construction is enabled, but resin adhesion and layer alignment become inconsistent
Solution Approach 1:
The patent introduces a movable stage that can dynamically adjust its position relative to the resin support tape. The stage is capable of movement in multiple directions (X, Y, and Z axes) to compensate for misalignment and maintain consistent layer positioning. This dynamic adjustment mechanism resolves the contradiction by enabling real-time correction of alignment issues while maintaining reliable resin adhesion through controlled stage movement during the curing process.
Solution Approach 2:
The patent incorporates sensors and control systems that monitor the position of the resin support tape and the stage during the tape casting process. This feedback mechanism allows the system to detect misalignment or tension variations and automatically adjust the stage position or tape feeding rate. The feedback control ensures consistent layer alignment and maintains reliable resin adhesion by continuously adapting to process variations.
2Productivity
If resin support tape is advanced between layers, then fresh resin is provided to buildzone, but layer thickness control becomes difficult
Solution Approach 1:
The patent replaces purely mechanical tape advancement with a coordinated system involving the movable stage and controlled resin deposition. The stage movement is synchronized with the resin deposition rate and the tape feeding mechanism. This substitution of mechanical control with a multi-parameter controlled system allows for precise layer thickness control while maintaining continuous layer formation productivity.
Solution Approach 2:
The patent employs controlled changes in process parameters including the speed of tape advancement, the rate of resin deposition, and the positioning speed of the stage. By dynamically adjusting these parameters in coordination, the system maintains consistent layer thickness while enabling continuous production. The parameter control ensures that fresh resin is provided at the correct rate and position as the tape advances.
3Productivity
If radiant energy is applied to cure resin, then layer formation is completed, but curing uniformity varies across the build zone
Solution Approach 1:
The patent employs a movable stage that can dynamically adjust its position during the curing process. The stage movement allows the radiant energy source to maintain optimal distance and angle relative to the resin layers being cured. This dynamic positioning ensures uniform curing across the entire build zone while maintaining high curing speed, resolving the contradiction between productivity and curing uniformity.
Solution Approach 2:
The patent implements periodic adjustment of the stage position or radiant energy source during the curing process. This periodic action ensures that all areas of the resin layer receive adequate and uniform radiant energy exposure. The periodic movement or adjustment prevents hot spots or uncured regions, achieving uniform curing while maintaining efficient production rates.
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 approach enables the efficient and precise construction of three-dimensional components with improved layer alignment and material properties, enhancing the capability to create complex objects with consistent quality.
Implementation Method 1
Stereolithography (SLA) is a type of additive manufacturing process, which employs a tank of radiant-energy curable photopolymer 'resin' and a curing energy source such as a laser. For each layer, the energy source draws or flashes a radiation image of the cross section of the component onto the surface of the resin. Exposure to the radiation cures and solidifies the pattern in the resin
Implementation Method 2
The apparatus includes features like non-stick coatings and pneumatic actuation zones to manage resin support movement and tension
Implementation Method 3
The apparatus includes features like non-stick coatings and pneumatic actuation zones to manage resin support movement and tension
Data Source
AI summary
An additive manufacturing apparatus includes a resin support configured to support a first resin and a second resin. A support plate includes a window. A stage is configured to hold one or more cured layers of the resin to form a component positioned opposite the support plate. A radiant energy device is positioned on an opposite side of the resin support from the stage and is operable to generate and project radiant energy in a patterned image through the window. An actuator assembly is configured to move the stage in a Z-axis direction and in a Y-axis direction.