Gluing Machine Roller Speed Control for Paper Roll Trailing Edge
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Solution Overview
Problem
Existing log gluing machines are limited by the speed of their upper belt, which restricts the independent adjustment of log feeding and rolling speeds between stations, leading to suboptimal production speed and quality due to the cooperation of constructive elements in both processing and forward movement.
Innovation Solution
A gluing machine design featuring independently motorized rollers and inclined surfaces that allow for separate control of log rotation and forward movement speeds, eliminating the need for common elements between the unwinding and subsequent stations to enable faster processing without compromising quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the upper belt is used to transport logs between stations and process logs at stations, then the machine structure is simplified, but the production speed is limited by the belt speed
Solution Approach 1:
The patent divides the log processing system into independent segments: the upper belt for transport between stations, and independent drive rollers at each station for local processing operations. This segmentation allows each component to operate at its own optimal speed without being constrained by the belt speed, thereby increasing overall production speed while maintaining structural simplicity.
Solution Approach 2:
The patent introduces independently motorized drive rollers that can dynamically adjust their rotation speed to match the specific requirements of each processing station. This dynamic speed control allows the log to be processed at different speeds at different stations, optimizing both production efficiency and processing quality without being limited by the constant speed of the transport belt.
2Manufacturing precision
If the upper belt speed is reduced to allow correct final edge identification during unwinding, then the identification quality is improved, but the forward feeding speed of the log is limited
Solution Approach 1:
The patent employs independently controlled drive rollers that can dynamically adjust their speed during the unwinding process. During the critical identification phase, the rollers slow down to allow proper final edge detection, then immediately accelerate to high speeds for rapid forward feeding. This dynamic speed adjustment resolves the contradiction between identification quality and feeding speed.
Solution Approach 2:
The patent implements periodic speed variation in the drive rollers, alternating between slow rotation during unwinding and identification phases, and fast rotation during forward feeding phases. This periodic action allows the system to sequentially achieve both high identification quality and high production speed without compromise.
3Productivity
If the log is fed forward quickly after final edge identification, then the production efficiency is improved, but the common upper belt cannot support different speeds for different stations
Solution Approach 1:
The patent segments the drive system into independent motorized rollers at each station, allowing each station to operate at its own optimal speed. This enables the log to be processed quickly at stations where high speed is beneficial, while maintaining slower speeds at stations requiring precision, thereby improving overall production efficiency with flexible speed adaptation.
Solution Approach 2:
The independently motorized drive rollers serve multiple functions: they can transport the log forward, rotate the log for unwinding, hold the log stationary for processing, and adjust speed dynamically. This multi-functionality replaces the single-speed upper belt, providing both high production efficiency and speed adaptability across different processing stages.
Data Source
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AI summary
A gluing machine (10) for gluing the final edge (11) of a log (12) successively comprising an introduction group of the logs (12) one after the other into the machine (10), an unwinding group of the log (12) associated with identification means of the final edge (11), an opening group of the final edge (11) from the log (12), a glue transfer group onto the log (12) and a rewinding group of the final edge (11) onto the log (12), in which the unwinding group of the log (12) comprises a pair of rollers (13, 14) arranged one (14) on top of the other (13) to make a passage for the log (12), the pair of rollers (13, 14) being selectively for the feeding and for the retention in rotation of the log (12), at least one inclined surface (15) of free rolling of the log (12) being provided downstream of the pair of rollers (13, 14).