Mold-Replicated Additive Manufacturing for Smooth Component Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing additive manufacturing techniques require extensive surface milling or finishing operations to achieve a smooth surface finish, which is time-consuming and inefficient, especially for producing multiple identical parts.
Innovation Solution
The use of a programmable CNC machine with controlled motion along the X, Y, and Z-axes, combined with an articulated application head, allows for the deposition of flowable material onto a mold with a contoured surface, eliminating the need for finishing operations by replicating the mold's surface accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additive manufacturing deposits material in stepped layers to achieve near net shape, then production speed is improved, but surface finish quality deteriorates requiring extensive milling operations
Solution Approach 1:
Instead of depositing material horizontally layer by layer and then milling the surface, the patent inverts the approach by depositing material vertically onto a contoured mold surface. The mold's pre-formed geometry directly imparts the desired surface finish to the deposited material, eliminating the need for subsequent milling operations while maintaining rapid production speeds
Solution Approach 2:
The mold surface is prepared in advance with the precise contoured geometry that corresponds to the desired final part surface. This preliminary action of creating the mold's contoured surface allows the deposited material to automatically acquire the correct surface finish, eliminating the need for post-deposition machining operations
2Manufacturing precision
If surface milling is performed with numerous passes to achieve smooth surface, then surface finish quality is improved, but production time increases significantly
Solution Approach 1:
The patent extracts the surface finishing function from the post-deposition processing stage and transfers it to the deposition stage itself. By incorporating the contoured mold surface into the deposition process, the surface finish is created during material deposition rather than requiring separate milling operations, thereby eliminating time loss
3Manufacturing precision
If extensive finishing operations are performed to achieve smooth surface, then manufacturing precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the surface finishing function into the deposition process by using a contoured mold surface. The mold's geometry directly imparts the desired surface finish to the deposited material, combining what were previously separate operations (deposition and finishing) into a single integrated process, thereby reducing device complexity and cost
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 components with surfaces substantially free of imperfections, reducing production time, effort, and cost, while eliminating the need for additional finishing processes.
Implementation Method 1
the new layer of flowable material may be deposited at a temperature sufficient enough to allow new layer of flowable material to melt and fuse with a previously deposited layer of flowable material
Implementation Method 2
allow new layer of flowable material to melt and fuse with a previously deposited layer of flowable material
Implementation Method 3
The flowable material, while generally hot and pliable, may be deposited upon a substrate (e.g., a mold), pressed down or otherwise flattened to some extent, and leveled to a consistent thickness
Implementation Method 4
an oscillating plate may be used to flatten the bead of flowable material to a desired thickness, thus effecting fusion to the previously deposited layer of flowable material
Data Source
AI summary
An additive manufacturing method for fabricating a component having a surface substantially free of imperfections may include providing a mold having a configuration corresponding to the component, and depositing a material on at least one surface of the mold to fabricate the component having the surface substantially free of imperfections.