Packaging Apparatus Cold Hot Glue Forming Wheel
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Solution Overview
Problem
The existing methods for packaging smoking articles in rigid packs with a hinged cover face challenges due to the slow drying time of cold glue, requiring additional hot glue for immediate stability, which complicates the application process with heavy dispensing units and necessitates a drying tunnel, increasing machine length.
Innovation Solution
A method and apparatus that apply cold glue points to package blanks before forming, with a stationary hot glue application station that applies hot glue points during temporary stops of the forming wheel, allowing immediate folding and reducing the need for a drying tunnel, thus shortening the machine layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cold glue is used for packaging, then long-term sealing characteristics are improved, but drying time increases and requires additional drying tunnel
Solution Approach 1:
Cold glue is applied to the package blanks before they enter the forming wheel, allowing the glue to be pre-positioned on the flaps. This preliminary action ensures that when the flaps are folded and joined during package formation, the cold glue is already in place to provide long-term sealing characteristics without requiring extended drying time during the forming process.
2Stability of the object's composition
If hot glue is added for immediate stability, then package stability is improved, but device complexity increases with heavy dispensing units
Solution Approach 1:
The hot glue application function is extracted from the main forming wheel and implemented as a separate, stationary dispensing device positioned adjacent to the forming wheel. This stationary device applies hot glue to the flaps as they pass by during the forming process, providing immediate stability without requiring heavy, moving dispensing units integrated into the forming wheel mechanism.
3Length of stationary object
If hot glue application is implemented, then drying path length is reduced, but folding timing becomes critical and must occur immediately
Solution Approach 1:
The hot glue acts as an intermediary that provides immediate temporary bonding between flaps, allowing them to be held in position during the forming process. This immediate bonding effect reduces the required drying path length while the cold glue provides the long-term sealing. The stationary hot glue dispensing device applies glue at the optimal moment as flaps pass by, eliminating the need for complex timing mechanisms.
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 ensures stable package formation without a drying tunnel, reducing the machine length by 1-1.5 meters while maintaining package quality, and simplifies retrofitting existing machines.
Implementation Method 1
cold glue (vinyl glue) is usually used which has better long-term sealing characteristics
Implementation Method 2
hot glue (hot melt) in addition to the cold glue. The hot glue ensures an immediate grip and allows obtainment of a stable and immediate fixing
Data Source
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AI summary
A method for packaging products (22) in box-shaped packages (24), comprising: - providing a package blank (20) having a longitudinal axis (B) parallel to its prevailing development direction, - applying cold glue (44) on predetermined areas (26, 28, 30, 32, 34, 38, 42) of said package blank (20), - positioning the package blank (20) and a respective product (22) in a respective seat (14) of a forming wheel rotatable in steps about a rotation axis (A), - progressively folding said package blank (20) around the respective product (22) during the stepwise movement of said forming wheel (12) around said rotation axis (A), - applying hot glue (64) on predetermined areas (28, 42) of said partially folded package blank (20) while said package blank (20) is temporarily in a stationary position, and - completing the folding of the package blank (20) around the respective product (22).