Adjustable Folding Heads for Fast Cardboard Box Wrapping Changeovers
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Solution Overview
Problem
Automated lines for making wrapped cardboard boxes face challenges in flexibility, speed, machine downtime during format changeover, and production of high-quality boxes with minimal creasing or imperfections, particularly when changing box formats.
Innovation Solution
An apparatus and method utilizing a support structure with movable folding heads and columns that can adapt to different box sizes, along with a control unit and actuators to facilitate precise folding operations, eliminating the need for die blocks and enabling flexible production of various box formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a die block is used for wrapping boxes, then the wrapping operation can be performed, but machine downtime increases during format changeover and flexibility decreases
Solution Approach 1:
The wrapping device is designed with adjustable folding elements and a reconfigurable support structure that can adapt to multiple box formats without requiring different die blocks. The device performs multiple functions (folding, tucking, and positioning) using a single integrated mechanism that can be reconfigured programmatically, eliminating the need for physical changeover of die blocks while maintaining versatility across different box sizes and styles.
Solution Approach 2:
The invention employs dynamically adjustable folding elements and a movable support structure that can be repositioned and reconfigured during operation. The folding elements include adjustable fingers and blades that can adapt their position and movement characteristics based on the specific box format being wrapped, allowing the device to transition smoothly between different formats without manual intervention or die block changes.
2Adaptability or versatility
If multiple die blocks are kept for different box formats, then flexibility is improved, but device complexity and stock management problems increase
Solution Approach 1:
The wrapping device consolidates multiple die block functions into a single reconfigurable unit. The adjustable folding elements, movable support structure, and programmable control system work together to provide the versatility of multiple die blocks while reducing the physical inventory and complexity of managing multiple components. The device can be reconfigured through software or simple mechanical adjustments rather than physical assembly changes.
3Adaptability or versatility
If complex changeover processes are used, then adaptability is improved, but machine downtime and loss of time increase
Solution Approach 1:
The device enables rapid format changes through dynamic repositioning of folding elements and support structures. The adjustable components can be moved and reconfigured quickly using motorized actuators or spring-loaded mechanisms, allowing operators to switch between box formats in minutes rather than hours. The programmable control system stores preset configurations for different formats, enabling one-touch changeover that eliminates complex manual adjustment procedures.
Solution Approach 2:
The device prepares for format changes in advance by pre-positioning adjustable components and pre-loading configuration data into the control system. The folding elements and support structures can be pre-adjusted to anticipated box formats, and the control system can pre-load wrapping parameters and folding sequences, minimizing the actual changeover time when a format switch is required.
4Ease of manufacture
If traditional folding mechanisms are used, then the wrapping process is simple, but manufacturing precision and edge quality deteriorate
Solution Approach 1:
The folding mechanism incorporates specialized folding elements with different local characteristics optimized for specific folding tasks. The folding blades and fingers have varying degrees of sharpness, curvature, and pressure distribution tailored to different flap types and box materials. This localized optimization of folding element properties enables precise, clean folds and sharp edges while maintaining overall mechanism simplicity through modular design.
Data Source
AI summary
An apparatus (1) for automatic wrapping of a wrapping blank (3) on lateral walls of a cardboard box (2), the wrapping blank (3) having a base (301) and a plurality of flaps (302, 303, 304, 305) connected thereto, comprises a plurality of folding heads (5) for folding the flaps of the wrapping blank (3) and tucking in their outer portions. Each folding head (5) includes a pair of fingers (502A), positionable inside the box (2) and movable reciprocally towards and away from each other so that the fingers (502A) can be reciprocally moved in sliding contact with the wrapping blank (3) on the internal surface of the lateral wall of the box (2).