Bag Making Machine Synchronized Ultrasonic and Thermal Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing efficiency of zipper bags is hindered by slow response times in ultrasonic devices used for crushing zipper member ends and potential deviations in the reciprocating cycles of heat-generating and ultrasonic horns, affecting internal airtightness and synchronization of processes.
Innovation Solution
A bag making machine with a conveying unit, side edge sealing device, and ultrasonic device where the heat-generating head and ultrasonic horn head reciprocate at the same cycle via a link member, connected to a rotating device and cam mechanism, ensuring synchronized processes and improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an air cylinder is used to reciprocate the ultrasonic horn, then the ultrasonic horn can be driven, but the response speed is slow and the number of reciprocations per unit time is limited
Solution Approach 1:
The patent replaces the air cylinder (pneumatic system) with a cam mechanism driven by a motor. The cam mechanism converts rotational motion into reciprocating motion of the ultrasonic horn, eliminating the slow response characteristics of pneumatic systems and enabling higher frequency reciprocations that improve manufacturing efficiency
Solution Approach 2:
The cam mechanism is designed to provide periodic reciprocating motion to the ultrasonic horn at optimized frequencies. This periodic action ensures consistent crushing of zipper member ends while operating at higher speeds than air cylinder systems, thereby increasing the number of operations per unit time
2Reliability
If the heat-generating head and ultrasonic horn reciprocate independently, then each process can be performed, but the reciprocating cycles may deviate causing synchronization issues
Solution Approach 1:
The patent combines the driving mechanisms of the heat-generating head and ultrasonic horn into a single cam mechanism system. Both components are driven by the same rotating cam, which ensures they reciprocate in synchronized cycles. This merging of drive systems eliminates synchronization deviations while maintaining manageable device complexity through unified mechanical design
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 configuration enhances the manufacturing efficiency of zipper bags by maintaining internal airtightness and synchronizing processes, reducing the likelihood of gaps and improving productivity.
Implementation Method 1
an ultrasonic device which is disposed on an upstream side of the side edge sealing device in the conveying direction and softens and crushes a part of a zipper member with ultrasonic waves
Implementation Method 2
a side edge sealing device which thermally fuses the films to each other at predetermined intervals in a width direction
Data Source
AI summary
The present invention is a bag making machine (20, 30). The bag making machine (20, 30) includes: a conveying unit (37) which conveys a multi-layer film (S) in which films (13a, 13b) are overlapped; a side edge sealing device (27) which thermally fuses the films (13a, 13b) to each other; and an ultrasonic device (26) which crushes a part of a zipper member (14) disposed between films (13a, 13b). The side edge sealing device (27) includes: a platform (44); and a heat-generating head (45). The ultrasonic device (26) includes: an anvil (41); and an ultrasonic horn head (42). The heating-generating head (45) and the ultrasonic horn head (42) reciprocate at a same cycle via a link member (51).