Transversal Sealing Tabs for Stable Pourable Package Formation
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Solution Overview
Problem
Existing package forming apparatuses and packaging machines for pourable products, such as Tetra Brik Aseptic packages, require improvements in precision and stability, particularly in the transversal sealing and cutting processes to ensure consistent package formation.
Innovation Solution
The package forming apparatus incorporates a system of operative devices with movable interaction tabs controlled by an actuation device, utilizing guide surfaces and rollers to ensure precise transversal sealing and cutting, and a conveying mechanism to maintain tube alignment, enhancing the operation's stability and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional sealing and cutting mechanisms are used, then the basic package formation function is achieved, but the precision and stability of transversal sealing and cutting are insufficient
Solution Approach 1:
The patent employs dynamic interaction tabs that can move between a first limit position (detached from tube) and a second limit position (interacting with tube). This dynamic positioning system allows the sealing and cutting elements to precisely engage with the tube only when needed, improving both the precision of transversal sealing/cutting and the stability of package formation by eliminating unwanted contact during non-operational phases
Solution Approach 2:
The operative device is divided into separate functional groups: interaction tabs for positioning, sealing elements for transversal sealing, and cutting elements for cutting. This segmentation allows each component to be optimized independently for its specific function, with the interaction tabs providing precise positioning while the sealing and cutting elements focus on their respective operations, thereby improving overall manufacturing precision and reliability
2Reliability
If interaction tabs continuously contact the tube, then positioning stability is improved, but wear increases
Solution Approach 1:
The interaction tabs are designed to dynamically switch between contacting and non-contacting states with the tube. They contact the tube only during the specific phase when positioning for sealing and cutting is required, and remain detached during other phases. This reduces cumulative wear on the interaction tabs while maintaining positioning stability during critical operations
Solution Approach 2:
The interaction tabs engage with the tube periodically during the package formation cycle (specifically during transversal sealing and cutting operations) and disengage during other phases. This periodic contact pattern reduces wear compared to continuous contact while ensuring positioning stability is maintained during the periodic engagement phases when it is most needed
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 design improves the precision and stability of package formation, ensuring consistent pattern registration and reduced wear, leading to higher-quality packages with improved operational efficiency.
Implementation Method 1
During its movement, the actuation body slides on the first guide surface and the second guide surface
Data Source
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AI summary
There is described a package forming apparatus (10) comprising one operative device (23) having a first operative group (24) and a second operative group (25) configured to at least transversally seal a tube (4) . One of the respective first operative group (24) and the respective second operative group (25) comprises a pair (26) of movable interaction tabs (27) configured to interact, in use, with the tube (4) from opposite sides thereof and being configured to move with respect to one another. The operative device (23) also comprises an actuation device (28) operatively coupled to the pair (26) of interaction tabs (27) and comprising an actuation body (29) configured to linearly move along a movement direction (D) and to modify the relative position of the interaction tabs (27) of the pair (26) of interaction tabs (27) during movement along the movement direction (D), a first guide surface (30) and a second guide surface (31) spaced apart from one another and configured to guide the linear movement of the actuation body (29), one or more first rollers (32) coupled to the first guide surface (30) and the actuation body (29) and/or one or more second rollers (33) coupled to the second guide surface (31) and the actuation body (29).