Modular Foaming Apparatus with Transfer-Closing Carousel
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Solution Overview
Problem
Current methods for foaming and conveying objects, such as refrigerator doors, are structurally complex and inefficient, leading to low productivity, frequent machine downtime, and inability to adapt to diverse geometrical configurations, which limits versatility and productivity in meeting the increasing demand for varied models and shapes.
Innovation Solution
A modular apparatus with separate conveying modules and transfer-closing carousel units allows for independent operation, enabling flexible adaptation to different geometrical configurations, simultaneous opening/closing and transfer operations, and real-time variation of foamed objects without downtime, using lighter and simpler mould structures with opposing rollers for clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tough press structures are used to withstand high foam pressure, then the structural strength is improved, but the device complexity and weight increase significantly
Solution Approach 1:
The press structure is divided into a movable press part and a fixed support part. The movable press part applies force locally to the mould while the fixed support part provides stability. This segmentation allows the press to withstand high foam pressures without requiring the entire structure to be overly complex or heavy.
Solution Approach 2:
The press applies excessive clamping force beyond what is strictly necessary to contain the foam expansion. This ensures that even as the foam expands and pushes against the mould, the clamping force remains sufficient to maintain structural integrity and prevent deformation, while allowing the press structure itself to be simpler.
2Ease of operation
If the drum carousel operates in indexed manner with frequent stops and restarts, then the operational control is improved, but the productivity decreases due to low accelerations and mechanical stress
Solution Approach 1:
The conveyor system is segmented into multiple independent modules (first conveying module, second conveying module, third conveying module) that can operate semi-independently. This allows different sections to be optimized for different functions (loading, foaming, unloading) and reduces the mechanical stress associated with frequent stopping and starting of a single large drum carousel.
Solution Approach 2:
The system transitions from a static indexed drum carousel to a more dynamic modular conveyor system where modules can be adjusted and reconfigured. The movable press part can dynamically adjust its position and applying force during the foaming process, allowing for faster cycle times and improved productivity while maintaining operational control.
3Ease of operation
If operators perform unloading and loading operations in sequence with drum rotation, then the operational procedure is simplified, but the production time increases due to sequential operations
Solution Approach 1:
The operational sequence is segmented across different modules and locations. The first conveying module handles unloading operations while the second module performs foaming operations and the third module handles loading operations. These can occur in parallel rather than strictly sequentially, reducing overall production cycle time while maintaining procedural simplicity through dedicated functional zones.
Solution Approach 2:
The system is designed to maintain continuous operation where possible. While the movable press part requires stopping to apply clamping force, the conveyor modules can continue moving materials through the system. The modular design allows overlapping of operations (unloading, foaming, loading) to occur with minimal interruption, reducing the time loss associated with sequential operations.
4Productivity
If the apparatus uses modular conveying modules that can operate independently, then the productivity and versatility are improved, but the device complexity increases
Solution Approach 1:
The apparatus is divided into modular conveying modules (first, second, and third modules) that can be configured in different arrangements and operate semi-independently. Each module performs a specific function (unloading, foaming, loading) and can be optimized individually. This segmentation enables high productivity through parallel operations while managing complexity by standardizing module designs and interfaces.
Solution Approach 2:
The modular conveying modules are designed with universal characteristics that allow them to perform multiple functions or be adapted for different production requirements. The movable press part can work with different mould configurations, and the conveyor modules can be arranged in various configurations depending on production volume and product type. This universality improves productivity across different applications while avoiding the need for entirely separate systems for each function.
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 significantly reduces production time, enhances versatility and productivity, allows for flexible adaptation to various shapes, and minimizes machine downtime, while reducing mechanical complexity and weight, enabling faster operation and efficient foaming processes.
Implementation Method 1
the polyurethane foam is poured... Whilst the foam, expanding, fills the respective cavities
Implementation Method 2
the foam polymerisation step occurs whilst the drum carousel rotates
Data Source
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AI summary
A method is disclosed for foaming objects (2) inside moulding units (4) that are conveyed along an advancement path (P) by means of distinct and separate conveying modules (MT1, MT2) that define a first portion (T1) and a second portion (T2) of path (P). In the first portion (T1) the steps occur of advancing moulding units (4) in an open position, extracting already moulded objects (2), preparing moulding units (4) for the subsequent foaming cycles of further objects (2), dispensing of the reactive mixture. Along the second portion (T2) of path (P) the moulding units (4) are advanced in the closed position while a polymerisation and shape-stabilisation process of said foamed objects (2) occurs. The mixture dispensing step is followed by a closing and transferring step, in which each moulding unit (4) is closed whilst, simultaneously, it is transferred from the first portion (T1) to the second portion (T2) of path (P) by a transfer-closing carousel unit (UCT). At the end of the polymerisation and shape-stabilisation process that occurs in the second portion (T2) of path, an opening and transfer step is provided, in which each moulding unit (4) is opened whilst, simultaneously, it is transferred from the second portion (T2) to the first portion (T1) of path by an opening-transfer carousel unit (UAT). The corresponding apparatus for implementing this method is also disclosed.