Textured Mold Replication via Vacuum Forming and Electroforming
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Solution Overview
Problem
Manufacturing textured surfaces with intricate patterns for articles at high production rates is challenging due to the difficulty in transferring these patterns from molds to materials effectively.
Innovation Solution
A method involving a film with a textured surface is disposed on a support, vacuum formed, and then electroformed to create a metal mold, which is used to replicate the texture onto various materials, allowing for the production of articles with textured surfaces that can be curved, planar, or a combination of both.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional molding methods are used to transfer intricate textured patterns from molds to articles, then manufacturing precision of the texture can be achieved, but productivity is reduced due to the difficulty in transferring patterns at high production rates
Solution Approach 1:
The process is divided into distinct stages: creating a master textured film, electroforming a mold from it, and then using that mold for high-volume production. This segmentation allows the intricate texture creation to be done once with high precision, while subsequent production can proceed at high speeds through efficient molding operations.
Solution Approach 2:
The textured film is created and electroformed into a mold before the actual production run. This preliminary action establishes the precise texture pattern in advance, allowing the mold to be reused multiple times for high-volume production without repeatedly creating the intricate texture pattern, thereby resolving the contradiction between precision and productivity.
2Shape
If complex textured patterns are manufactured using conventional methods, then the desired surface geometry can be achieved, but the manufacturing process becomes difficult and time-consuming
Solution Approach 1:
The intricate textured pattern is first created on a flexible film, then copied onto a rigid mold through electroforming. This copying process allows complex surface geometries to be captured with high fidelity while simplifying the subsequent manufacturing process, as the electroformed mold can be easily used for repeated production without the difficulties of directly creating complex textures on rigid molds each time.
3Productivity
If high production rates are pursued for textured articles, then productivity increases, but manufacturing precision of the texture pattern deteriorates due to transfer difficulties
Solution Approach 1:
The invention changes the physical state and properties of the mold material through electroforming, creating a rigid mold from a flexible textured film. This parameter change allows the mold to maintain precise texture patterns during high-speed production, as the rigid structure prevents deformation and ensures consistent pattern transfer even at high production rates, resolving the contradiction between productivity and precision.
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 efficient replication of textured surfaces onto articles, facilitating high-volume production of articles with complex surface geometries, suitable for diverse applications including biomedical and industrial uses.
Implementation Method 1
a method of forming a mold comprising disposing a film having a textured surface on a support; where the support has a shape of an article to be manufactured; pressing the film onto the support to cover a surface of the support
Implementation Method 2
disposing a backing on the film; where the support has a shape of an article to be manufactured
Data Source
AI summary
Disclosed herein is a method of forming a mold comprising disposing a film having a textured surface on a support; where the support has a shape of an article to be manufactured; pressing the film onto the support to cover a surface of the support; disposing a backing on the film; separating the support from the backing; and molding a material in the backing. Disclosed herein too is a method comprising contacting a first mandrel with a first mold; where the first mold has a textured surface; texturing a surface of the first mandrel with the first mold; disposing the first mandrel in a die; disposing a first material in the die to contact the first mandrel; imparting a texture from the surface of the first mandrel onto the material to form a second mold; and disposing a texture from the second mold onto a second material; where the second material is different from the first material.