Flat Bottom Bag Machine Adjustable Scoring Pinching Mechanism
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Solution Overview
Problem
Existing machines for producing flat bottom bags are inflexible and require laborious adjustments to change bag formats, leading to difficulties in anticipating and adjusting bag characteristics during operation, resulting in reduced efficiency and increased downtime.
Innovation Solution
A machine with adjustable scoring and pinching mechanisms, including planetary gear systems and adjustment means, allows for synchronous adjustment of fold line positions and distances during operation without stopping the machine, enabling rapid format changes and improved production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the machine is designed for a single bag format with fixed scoring and pinching means, then manufacturing precision is maintained, but adaptability to different bag formats deteriorates
Solution Approach 1:
The patent implements adjustable scoring means (first and second scoring means) and adjustable pinching means (front pinching means and lateral pinching means) that can be repositioned along the drum circumference. This dynamic positioning capability allows the machine to adapt to different bag formats by modifying the angular positions of these components, thereby achieving versatility without requiring a completely different machine design for each format.
Solution Approach 2:
The drum-based manufacturing machine is designed with multi-functional scoring and pinching means that can serve multiple bag formats through adjustment. The same physical components (scoring means, pinching means) can be repositioned to create different fold lines and bag geometries, making a single machine universal for producing various flat bottom bag formats rather than requiring dedicated machines for each format.
2Ease of operation
If the machine operates at high production rate with automated operations, then productivity is improved, but the ability to adjust bag characteristics in real-time deteriorates
Solution Approach 1:
The adjustment mechanisms are designed to be pre-positioned and pre-calibrated during setup, allowing for quick modifications during operation. The scoring means and pinching means can be adjusted to new positions without requiring complex real-time calculations or multiple trial runs, as the adjustment system is prepared in advance to accommodate different bag formats and characteristics.
3Productivity
If adjustments are made while the machine is stopped to change bag format, then manufacturing precision is maintained, but productivity deteriorates due to downtime
Solution Approach 1:
The machine incorporates dynamic adjustment capabilities that allow scoring means and pinching means to be repositioned while the drum is rotating or immediately before/after production cycles. This enables format changes without complete machine shutdown, maintaining continuous production flow while achieving precise fold line positions through the adjustable mechanisms.
Data Source
AI summary
A machine for manufacturing flat bottom bags includes a drum for carrying along at least one blank having a flattened tubular shape in an advancing direction, a first scoring apparatus upstream of the drum for marking on the blank a first folding line which is transverse with respect to the advancing direction, a front gripper on the drum that grips a front edge of the blank on the drum, in an opening step, and and carries along the blank, a first lateral gripping means on the drum that grip the lateral edges of the blank in the region of the first folding line.