Additive Energy Director Formation via Molten Material Dispensing
Solution Overview
Problem
Current ultrasonic or vibration welding methods require expensive retooling and mold die replacement for changes in energy director shape or configuration, limiting flexibility in the manufacturing process.
Innovation Solution
A method and system for forming additive energy directors by dispensing molten material onto a substrate at predetermined locations, allowing for flexible placement and modification without retooling, using techniques such as drop-on-demand, spray deposition, or 3D template formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If energy directors are integrally formed on the substrate during molding, then the energy director structure is precise and consistent, but any changes to shape or configuration require expensive retooling and replacement of the mold die
Solution Approach 1:
The energy director is separated from the substrate manufacturing process. Instead of being integrally molded, the energy director is applied as a separate component through screen printing, allowing independent optimization and modification without affecting the substrate mold
Solution Approach 2:
The mold die cavity is used to create a negative impression or template, which then guides the screen printing process to deposit material in the precise geometric configuration needed. This allows the mold die to serve as a reusable template rather than requiring direct retooling for design changes
2Manufacturing precision
If the mold die is precision machined to include energy director features, then the energy director geometry is accurate, but retooling is required for any design changes
Solution Approach 1:
The mold die cavity is prepared in advance as a permanent template that defines the energy director geometry. This preliminary action creates a reusable negative impression that can be used repeatedly without modification, eliminating the need for retooling when producing different energy director designs
Solution Approach 2:
The precise geometry is captured in the mold die cavity as a template, which then copies the desired pattern through the screen printing process. This allows accurate reproduction of energy director geometry without requiring the mold die itself to be retooled for design changes
3Productivity
If traditional molding methods are used to form energy directors, then the process is integrated into substrate production, but flexibility in placement and configuration is limited
Solution Approach 1:
The energy director pattern becomes dynamic and changeable through the screen printing process. Unlike integral molding where the pattern is fixed in the mold, screen printing allows the pattern to be adjusted by changing the screen or printing parameters without changing the fundamental manufacturing process
Solution Approach 2:
A screen or stencil is introduced as an intermediary element between the material source and the substrate. This screen acts as a flexible template that can be easily changed to modify the energy director pattern, decoupling the placement flexibility from the substrate manufacturing process
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
Enables precise control over energy director placement and geometry, improving uniformity and reducing production time by allowing for quick programming changes, eliminating the need for costly mold die adjustments.
Implementation Method 1
dispensing a molten material onto a substrate at a predetermined location; and solidifying the molten material to form at least one additive energy director onto the substrate
Data Source
AI summary
A method of forming additive energy directors according to various exemplary embodiments can include dispensing a molten material onto a substrate at a predetermined location. The method also includes solidifying the molten material to form at least one additive energy director onto the substrate.