Compliant Transfer Mold for Wet Part Dewatering
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Solution Overview
Problem
Existing pulp molding technologies face challenges in efficiently dewatering wet parts without damaging the transfer molds, leading to increased energy and time consumption during drying, and often require separate wet presses.
Innovation Solution
The development of transfer molds with a compliance level, determined by a processor based on predicted pressures, which allows for controlled force application during dewatering and transfer operations, reducing the risk of damage and enabling efficient dewatering without a separate wet press.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a separate wet press is used for dewatering, then dewatering efficiency is improved, but device complexity and process time increase
Solution Approach 1:
The patent combines the dewatering function into the transfer mold itself, which serves dual purposes: transferring the formed part and dewatering it. The transfer mold includes dewatering channels and working surfaces that actively remove water during the transfer operation, eliminating the need for a separate wet press device and reducing process complexity while maintaining dewatering efficiency
Solution Approach 2:
The transfer mold is designed with multi-functionality, performing both transfer and dewatering operations simultaneously. The mold includes active dewatering features such as channels, grooves, and working surfaces that enable water removal during the transfer process, allowing one component to fulfill multiple functions that previously required separate equipment
2Strength
If rigid transfer molds are used, then structural strength is improved, but risk of damage during dewatering increases
Solution Approach 1:
The transfer mold incorporates flexible or compliant elements such as elastomeric layers, flexible membranes, or compliant working surfaces that can deform under pressure during dewatering operations. These flexible components accommodate pressure variations and prevent damage to both the mold and the formed part, while the overall mold structure maintains sufficient rigidity through its framework and support structures
Solution Approach 2:
The patent employs materials and structures with controlled compliance levels that allow the mold to adapt its rigidity based on operating conditions. The transfer mold may include layers or components with varying degrees of flexibility that enable the structure to be rigid enough for structural support yet compliant enough to prevent damage during the dewatering process by absorbing pressure shocks and variations
3Productivity
If excessive force is applied during dewatering, then dewatering efficiency is improved, but risk of damage to transfer mold increases
Solution Approach 1:
The flexible or compliant working surfaces of the transfer mold allow controlled deformation under dewatering forces, enabling the application of sufficient pressure for effective water removal while preventing excessive force transmission that could damage the mold structure. The flexibility acts as a pressure-regulating mechanism
Solution Approach 2:
The transfer mold design incorporates dynamic compliance that allows the structure to adapt to varying dewatering forces in real-time. The compliant elements enable the mold to flex and deform under load, distributing forces evenly and preventing localized stress concentrations that could lead to damage, while maintaining enough structural integrity to perform effective dewatering
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 efficient dewatering of wet parts, reducing energy and time consumption during drying and minimizing the risk of damage to the transfer molds, while eliminating the need for a separate wet press.
Implementation Method 1
Dewatering the wet part may include removing some of the water contained in the wet part... pressures that the transfer mold is predicted to undergo during use of the transfer mold to dewater the wet part
Implementation Method 2
the transfer molds may include a compliance level, e.g., a compressibility level, an elasticity level, or the like, that may enable the transfer molds to dewater the wet part while the wet part is on the forming tool and while reducing a risk of damage to the transfer molds
Data Source
AI summary
According to examples, a non-transitory computer-readable medium may have stored thereon instructions that may cause a processor to determine a compliance level that the transfer mold is to have when the transfer mold is fabricated, in which the compliance level is to cause the transfer mold to apply a predefined level of force onto the wet part while reducing a risk of damage to the transfer mold caused by the application of the predefined level of force. The instructions may also cause the processor to generate a three-dimensional (3D) model of the transfer mold to have the determined compliance level when the transfer mold is fabricated.