Embossing System Vibration Control for Glue Distribution
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Solution Overview
Problem
Existing embossing systems face issues with inadequate temperature control for the cliche roller, leading to overheating due to insufficient or incorrect glue distribution, which can damage the roller and is not detected in real time.
Innovation Solution
A vibration-based control mechanism that compares the cliche roller's vibrations during operation to a reference model created in a testing phase, using a sensor to detect and convert vibrations into electrical signals for real-time monitoring and generating alarms or controlling the system to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If temperature control systems are used to monitor the cliche roller, then the roller temperature can be maintained, but the control is delayed and detection occurs only after overheating has already occurred
Solution Approach 1:
The vibration sensor detects abnormal vibrations in the cliche roller before overheating occurs, allowing preliminary action to be taken to prevent damage. The system monitors glue distribution issues through vibration changes and triggers warnings before the temperature reaches dangerous levels, thus avoiding the delayed detection problem of traditional temperature control systems.
2Reliability
If vibration sensors are used to detect glue distribution issues, then real-time monitoring is achieved, but the system complexity increases
Solution Approach 1:
The vibration sensor acts as an intermediary that indirectly monitors glue distribution by detecting vibrations caused by improper glue application. Instead of directly measuring glue quantity or temperature, the system uses vibration as a mediator to detect issues, simplifying the overall monitoring approach while maintaining real-time capability.
3Manufacturing precision
If the anilox roller and cliche roller rotate at different speeds to distribute glue correctly, then glue distribution is improved, but friction and heat generation increase causing overheating
Solution Approach 1:
The vibration sensor provides continuous feedback on the operational state of the cliche roller. When abnormal vibrations indicate improper glue distribution or excessive friction, the system can adjust operating parameters to prevent overheating, thus maintaining both accurate glue distribution and acceptable temperature levels.
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
Enables rapid and efficient control to ensure correct glue distribution, significantly reducing the risk of cliche roller damage and maintaining optimal operating conditions.
Implementation Method 1
a vibration sensor apt to produce electrical signals having amplitude and / or frequency related to the vibrations at which said cliche roller is instantaneously subject
Data Source
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Figure 3~5
AI summary
An embossing system comprising: an embossing unit with at least one embossing roller (Gl; G2) arranged to emboss a web of paper (VI; V2) intended to be joined with a further web (V2, VI) by gluing; and a gluing unit associated with the embossing unit, with a tank (T) containing the glue used to perform said gluing and a glue dispensing device (GD) comprising a cliche roller (CR) adapted to distribute by contact the glue contained in the tank (T) on one of said webs (VI, V2) while the embossing is performed, said cliche roller (CR) rotating with a pre-fixed angular velocity around an axis (x) parallel to said at least one embossing roller (Gl; G2). The system further comprises: a sensor (2) apt to produce electrical signals having amplitude and / or frequency related to the vibrations at whom said cliche roll (CR) is instantaneously subject, while the same rotates around said axis (x); a control unit (1) that during operation of the system receives instantaneous data of the amplitude and / or frequency of the signals produced by said sensor (2) and compares them with reference data contained in a file (DB) previously acquired by testing the embossing unit and the gluing unit in conditions of regular and respectively non-regular distribution of the glue on the cliche roller (CR), said reference data being constituted by a first set of amplitude and / or frequency data representative of normal vibrations and a second set of amplitude and / or frequency data representative of abnormal vibrations respectively, the control unit (1) being programmed to generate an alarm signal if at least an instantaneous datum of amplitude and / or frequency of the signals produced by said sensor (2) corresponds to at least a datum of amplitude and / or frequency of the second set.