Reinforced Thin-Shell Molds Using Composite Materials
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional process for forming polymeric resin molds using rapid prototyping is costly due to the high material usage and long fabrication time, as solid molds require substantial material and the shelling process is time-consuming and expensive, while hollowing out molds to reduce material usage can compromise structural integrity.
Innovation Solution
A method involving the use of a rapid-prototyping process to create a polymeric resin shell, introducing a reinforcing material into the shell, and curing it to enhance structural rigidity, thereby reducing material usage and fabrication time while maintaining mold strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid forms are used to ensure structural rigidity and strength, then mold strength is improved, but material usage and fabrication time increase
Solution Approach 1:
The patent applies composite materials by combining a polymeric resin shell (formed by rapid prototyping) with a reinforcing material (such as metal or ceramic) to create a hybrid mold structure. The shell provides the basic mold geometry while the reinforcing material provides the necessary structural rigidity and strength, allowing the mold to withstand molding pressures without requiring excessive polymeric resin material.
Solution Approach 2:
The patent applies local quality by providing reinforcement only where structurally necessary within the mold. Rather than making the entire mold solid, the reinforcing material is strategically placed in specific regions to provide localized strength and rigidity, reducing overall material usage while maintaining adequate mold performance.
2Strength
If solid forms are used to ensure structural rigidity and strength, then mold strength is improved, but fabrication time increases
Solution Approach 1:
The patent applies composite materials by combining a polymeric resin shell (formed by rapid prototyping) with a reinforcing material (such as metal or ceramic) to create a hybrid mold structure. The shell provides the basic mold geometry while the reinforcing material provides the necessary structural rigidity and strength, allowing the mold to withstand molding pressures without requiring excessive polymeric resin material.
Solution Approach 2:
The patent applies segmentation by dividing the mold into two distinct components: a rapidly fabricated polymeric resin shell and a separately introduced reinforcing material. This segmentation allows each component to be optimized independently - the shell for rapid prototyping and the reinforcing material for structural integrity - thereby reducing overall fabrication time compared to creating a single solid form.
3Quantity of substance
If material is removed to reduce costs, then material usage is reduced, but structural integrity degrades
Solution Approach 1:
The patent applies composite materials by combining a polymeric resin shell (formed by rapid prototyping) with a reinforcing material (such as metal or ceramic) to create a hybrid mold structure. The shell provides the basic mold geometry while the reinforcing material provides the necessary structural rigidity and strength, allowing the mold to withstand molding pressures without requiring excessive polymeric resin material.
Solution Approach 2:
The patent applies flexible shells and thin films by using a thin-walled polymeric resin shell that is subsequently reinforced. The shell acts as a flexible form that can be rapidly fabricated, then the reinforcing material is introduced to provide the necessary structural integrity, allowing material reduction while maintaining strength.
4Quantity of substance
If shelling process is used to reduce material usage, then material costs are reduced, but production time and costs increase
Solution Approach 1:
The patent applies preliminary action by forming the polymeric resin shell in its final configuration during the rapid prototyping process, eliminating the need for subsequent shelling operations. The shell is created with the correct geometry and thickness in one step, and the reinforcing material is then introduced, avoiding the time-consuming separate shelling process required in conventional methods.
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 allows for the creation of molds with sufficient strength and rigidity while minimizing polymeric resin material usage and fabrication time, thus reducing costs and improving efficiency in the molding process.
Implementation Method 1
The completed molds may be hollowed out or 'shelled' before they are cured
Implementation Method 2
introducing a reinforcing material into the shell
Implementation Method 3
curing the shell
Data Source
AI summary
A method and a system for forming a polymeric resin mold for molding plastic items, wherein the method includes: (a) using a rapid-prototyping process to create a polymeric resin shell having a configuration in the form of the mold; (b) introducing a reinforcing material into the shell; and (c) curing the shell. The system includes a rapid-prototyping apparatus that creates a plurality of the polymeric resin shells on a platform; a reinforcing material introduction apparatus that introduces a reinforcing material into each of the shells while the shells are on the platform to form a plurality of uncured molds on the platform; and a curing apparatus that cures the shells while they are on the platform.