Folding Device U-Shaped Frame Segmentation for Carton Stability
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Solution Overview
Problem
Conventional folding devices for carton blanks experience deformation of side legs due to weight and counterforces, leading to inconsistent folding of cartons.
Innovation Solution
The folding device is redesigned with two U-shaped frames, each with a base leg and side legs, arranged to face each other, and equipped with drive motors for vertical movement, allowing for adjustable side leg length and folding tool placement, enabling synchronized or independent operation of sub-units for various folding modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single U-shaped frame is used in conventional folding devices, then the device structure is simple, but the side legs deform under weight and counterforces leading to inconsistent folding
Solution Approach 1:
The single U-shaped frame is divided into two separate U-shaped frames (first and second folding die sub-units), each capable of independent vertical movement. This segmentation allows each frame to independently support folding tools and apply force to the carton blank, eliminating the deformation problem while maintaining structural simplicity through modular design.
2Adaptability or versatility
If side legs are made longer to increase span, then the frame can accommodate larger cartons, but the side legs deform more under their own weight and counterforces
Solution Approach 1:
By splitting the frame into two independent U-shaped frames, each frame can have shorter side legs that are more stable, while the combined system can still accommodate various carton sizes through the coordinated movement of both frames. The segmentation allows optimization of individual frame dimensions for stability while maintaining overall system versatility.
Solution Approach 2:
The two U-shaped frames are arranged with openings facing each other, creating a symmetric configuration that provides lateral support. This dimensional arrangement allows the frames to work together in a coordinated manner, effectively increasing the stable span without requiring individually longer side legs.
3Stability of the object's composition
If two U-shaped frames are used to improve stability, then side leg deformation is reduced, but the device becomes more complex
Solution Approach 1:
The division into two independent U-shaped frames, each with its own vertical support and drive motor, provides stability through redundancy while maintaining modular simplicity. Each frame is a complete, self-contained unit that can be manufactured and assembled independently, reducing overall system complexity despite having two frames.
Solution Approach 2:
Both U-shaped frames perform the same functions (supporting folding tools, applying force, maintaining stability) and can operate independently or in coordination. This universality allows the system to handle various folding operations and carton formats with the same basic frame design, avoiding the need for specialized components.
4Ease of manufacture
If drive motors are arranged outside the vertical support to facilitate access, then motor installation is easier, but the overall device length increases
Solution Approach 1:
The drive motors are positioned within the longitudinal extent of the vertical supports, nesting the motor assembly within the existing structural footprint. This allows the motors to be installed and maintained with reasonable access while minimizing the overall device length, as the motors occupy space that would otherwise be unused structural volume.
Data Source
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AI summary
The invention relates to a folding device (100) for folding a cardboard blank (102) that does not belong to the folding device (100). The folding device (100) comprises a folding die unit (106) and a folding head unit (104). According to the invention, the folding die unit (106) comprises two folding die sub-units (108), each of which has a substantially U-shaped frame (110). A plurality of folding tools (112) are arranged on each frame (110). Furthermore, a base leg (110a) of the U-shape of each folding die sub-unit (108) is movably mounted up and down in the vertical direction (H) on a separate vertical support (114). The two U-shaped frames (110) are arranged so that the openings (110c) of the respective U-shapes point towards each other.