Movable Heat-Sealing Devices for Continuous Packaging
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Solution Overview
Problem
Existing packaging machines face limitations in productivity due to reciprocating motion of heat-sealing devices, which stress mechanical components and require packs to stop for heat-sealing, and are inflexible in adapting to different formats and speeds, leading to increased costs and structural complexity.
Innovation Solution
A packaging assembly with heat-sealing devices that can move independently along two directions, allowing for reconfiguration of trajectories and continuous operation, using motorized belts and a control unit to program motion sequences, enabling adaptation to various formats and speeds while maintaining structural simplicity and low costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reciprocating motion is used for heat-sealing devices, then heat-sealing function is achieved, but productivity is reduced due to continuous accelerations and decelerations stressing mechanical components
Solution Approach 1:
The patent applies dynamics by making the heat-sealing devices movable along a predefined path rather than stationary. The devices move continuously without reciprocating, eliminating repeated accelerations and decelerations that stress mechanical components. This dynamic positioning allows the heat-sealing units to follow packs through the tunnel while maintaining continuous motion, thereby improving both reliability and productivity.
2Reliability
If reciprocating motion is used for heat-sealing devices, then heat-sealing is possible, but continuous operation is excluded as packs must stop for heat-sealing
Solution Approach 1:
The patent implements continuity of useful action by enabling heat-sealing to occur during continuous pack movement through the tunnel. The movable heat-sealing devices follow the packs along the predefined path and perform sealing operations without requiring packs to stop. This eliminates idle time and enables continuous operation while maintaining complete heat-sealing of all packs.
3Productivity
If annular path with mechanical guides is used for heat-sealing devices, then continuous operation is achieved, but adaptability to different formats and speeds is lost
Solution Approach 1:
The patent applies dynamics by making the heat-sealing devices movable along a predefined path rather than constrained to fixed mechanical guides. This allows the trajectory to be dynamically adjusted for different pack formats and speeds without requiring physical reconfiguration of the machine structure, thereby maintaining both continuous operation and adaptability.
Solution Approach 2:
The patent implements parameter changes by allowing the predefined path parameters (such as position, speed, and trajectory) to be modified according to different pack formats and processing requirements. This enables the heat-sealing devices to adapt to various operating conditions while maintaining continuous motion through the tunnel.
4Productivity
If number of heat-sealing device pairs is increased to achieve higher speeds, then productivity increases, but machine cost and structural complexity increase
Solution Approach 1:
The patent applies universality by designing movable heat-sealing devices that can serve multiple packs sequentially along the tunnel path. Instead of having separate heat-sealing devices for each pack position, the same devices move through the tunnel and service multiple packs in sequence, thereby achieving high productivity with fewer devices and reduced structural complexity.
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
The solution enables high productivity, flexibility in handling different formats and speeds, and reduces mechanical stress, achieving efficient and adaptable heat-sealing without the need for extensive machine reconfiguration or increased costs.
Implementation Method 1
a heat-sealing assembly acts which is constituted by a pair of heat-sealing devices, which can perform a translational motion along a direction that is substantially transverse with respect to the advancement direction of the pack being processed. The two devices become active once the pack has passed beyond them, in order to close behind such pack the two folded and open flaps of the film by means of the devices
Data Source
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Figure 5~6
AI summary
A packaging assembly (1), comprising movement means (2) arranged along a predefined path (3) for an element to be packaged (4) by means of a film (5) made of polymeric material that arrives from a feeder (6). The packaging assembly (1) comprises a station (7) for folding the film (5) onto the element (4), downstream of which there is a unit (8) for heat-sealing the folded flaps of the film (5); the heat-sealing unit (8) comprises at least one pair of heat-sealing elements (9), which are arranged on opposite sides with respect to he predefined path (3) and are functionally associated with respective actuation and control assemblies (10). The heat-sealing elements (9) act, during the heat-sealing step, each along at least two mutually independent directions, performing heat-sealing on the elements to be packaged (4) even in motion.