Compact Bag-Making Machine with Single Frame and Two-Spindle Winder
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Solution Overview
Problem
Existing bag-making machines are bulky and costly to manufacture, with discrete input, sealing, and output sections that are difficult to galvanize due to their size, and winders require three spindles to achieve desired cycle rates and machine speed, leading to potential interference during the winding process.
Innovation Solution
A compact bag-making machine design with a single common frame for input, drum, and output sections, featuring an adjustable drum with rotating plates to change seal bar distance and a winder with a two-spindle turret that allows for center and surface winding without interference, using collapsible spindles for easy roll removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discrete sections (input, sealing, output) are supported by separate frames, then each section can be independently designed and assembled, but the overall machine size increases and manufacturing cost increases
Solution Approach 1:
The patent combines the input section, drum section, and output section onto a single common frame structure. This merging eliminates the need for multiple separate frames, reducing the overall machine footprint and manufacturing cost while maintaining the functional independence of each section through modular component design.
2Reliability
If frames are painted or coated after assembly, then corrosion protection is provided, but the coating process becomes complex and costly for large structures
Solution Approach 1:
The frame is designed to be galvanized or coated before assembly into the final machine structure. This preliminary coating action allows the entire frame to be protected in a single, efficient process rather than requiring complex multi-step coating of assembled sections, reducing manufacturing complexity while ensuring comprehensive corrosion protection.
3Productivity
If three spindles are used in the winder turret, then the desired cycle rate and machine speed are achieved, but the push off position can interfere with subsequent winding operations
Solution Approach 1:
The patent repositions the push-off location to a different spatial dimension or orientation relative to the winding spindles. Instead of having the push-off position vertically above the winding positions where it could fall and interfere, the push-off is positioned in a location where removed rolls do not interfere with subsequent winding operations, maintaining both high productivity and operational reliability.
4Adaptability or versatility
If the drum diameter is adjusted using threaded rods, then bag size can be changed, but the adjustment mechanism becomes complex
Solution Approach 1:
The patent employs threaded rods as adjustment mechanisms to change the drum diameter and hence bag size. The threaded rod mechanism allows for precise parameter changes in drum positioning while maintaining a relatively simple structural implementation, achieving adaptability without excessive 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 compact machine design allows for economic manufacturing and efficient bag production with reduced ESD risks, while the winder's design ensures tight and efficient winding without interfering with roll removal, eliminating the need for a third spindle position.
Implementation Method 1
The seals bars are heated and create the seals forming the bags from the web
Implementation Method 2
The web is held against the drum (and the seals bars) by a Teflon coated blanket
Implementation Method 3
The side frames are each single metal plates that are galvanized
Data Source
AI summary
A machine for making bags is disclosed and includes input, drum, and output sections. The drum section has at least one seal bar on a drum. The sections are mounted to side frames that are single metal plates. The frames are not coated after being formed and/or are comprised of at least one of galvanized steel, galvannealed steel, stainless steel or aluminum. The drum is comprised of first and second plates, and opposing third and fourth plates. The first plate is rotatable with respect to the second plate, and the third plate is rotatable with respect to the fourth plate. The distance from the seal bars to the center of the drum is responsive to the rotation of the plates. The first plate has a plurality of non-radial grooves, and the second plate has a plurality of radial slots, with fixtures in the slots and grooves. The fixtures are connected to seal bars. The non-radial grooves are curved and/or spiraled. The plates are comprised of zinc plated steel and/or are discs. The winder includes a rotatable turret with a center and surface wind position, and a center wind only position. When one spindle is in the center and surface wind position, the other spindle is in the center wind only position. A push off palm mounted in a push off position. The spindle is collapsible.