Bag-Making Machine Clamp Prevents Cutting Shift
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Solution Overview
Problem
Existing bag-making and packaging machines using ultrasonic waves face issues with the distal end of the horn sliding easily, causing the film to be pulled and the cutting position to shift during transverse sealing.
Innovation Solution
A bag-making and packaging machine equipped with a pair of ultrasonic sealing members, a cutting member, and clamps that restrain the bags during transverse sealing, preventing shifting by applying tension in the direction of the bags being lifted up, and optionally utilizing a film conveyance unit to further stabilize the film above the sealing members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic sealing members are used for transverse sealing, then sealing efficiency is improved, but the distal end of the horn slides easily causing cutting position to shift
Solution Approach 1:
The clamp is positioned to clamp the film before the cutting member performs the cutting operation. This preliminary action prevents the film from being pulled upward during cutting, thereby counteracting the potential sliding of the horn distal end and maintaining cutting position accuracy despite the high-speed ultrasonic sealing process
Solution Approach 2:
The clamp acts as an intermediary element between the ultrasonic sealing members and the cutting member. It provides mechanical support to the film at the lower end, preventing upward movement that would otherwise occur during cutting, thus mediating between the sealing and cutting operations to maintain precision
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
Prevents shifting of the cutting position and ensures accurate cutting by maintaining tension and stability during the transverse sealing process, allowing for consistent bag production sizes and preventing bags from hanging down or being lifted during cutting.
Implementation Method 1
a horn and an anvil that comprise a pair transversely seal, by means of ultrasonic waves
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
It is a problem of the present invention to provide a bag-making and packaging machine that can prevent the position at which transversely sealed portions are cut from shifting. In a bag-making and packaging machine (1), tension in a direction in which bags B are lifted up occurs when a cutter (71) cuts transversely sealed portions, but because portions under the transversely sealed portions are restrained by a clamp (73a) and a clamp (73b), the bags B are not lifted up and shifting of the cutting position is prevented. Furthermore, in the bag-making and packaging machine (1), pull-down belt mechanisms (52) restrain a cylindrical film Fc above sealing jaws (56a, 56b), so there is no need to provide clamps above.