Feeding Module for Multi-Segment Rod Cutting with Independent Drum Control
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Solution Overview
Problem
Current manufacturing processes for multi-segment tobacco articles face challenges in maintaining constant cutting speed due to variable rotational speeds of conveying drums, leading to inefficiencies in the cutting process and quality control issues, particularly in rejecting defective rods without affecting the feeding process.
Innovation Solution
A feeding module with a hopper, receiving drum, conveying drum, cutting head, shifting drum, aligning drum, filling sensor, quality control sensor, and rod rejector, allowing for independent control of the receiving drum's speed and enabling constant conveyor drum speed during cutting, along with a replenishing apparatus to maintain consistent feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotational speed of the conveying drum is increased to improve productivity, then the manufacturing efficiency is improved, but the cutting quality deteriorates because the feed speed of articles to be cut becomes variable
Solution Approach 1:
The conveying system is segmented into multiple independent conveying drums (first conveying drum, second conveying drum, third conveying drum) that can operate at different speeds. This allows the cutting drum to rotate at a constant speed for quality cutting while other conveying drums can vary their speed to maintain productivity and handle defective rod rejection.
Solution Approach 2:
The system implements dynamic speed control where the rotational speed of conveying drums can be independently adjusted. The control unit varies the rotational speed of specific conveying drums based on whether defective rods need to be rejected, allowing the cutting process to maintain constant speed while overall productivity is optimized.
2Manufacturing precision
If the rotational speed of the conveying drum is decreased to maintain constant cutting speed, then the cutting quality is maintained, but the productivity deteriorates
Solution Approach 1:
The conveying system is divided into multiple independent conveying drums that can operate at different speeds. This segmentation allows the cutting drum to rotate at a constant speed for quality cutting while other conveying drums can vary their speed to maintain productivity and handle defective rod rejection.
Solution Approach 2:
The system maintains continuous operation by using multiple conveying drums that can independently handle rod feeding. When defective rods need to be rejected, the system continues to operate without interruption by adjusting the speed of specific conveying drums while the cutting drum maintains constant rotation, ensuring continuous productive action.
3Reliability
If the conveying drum speed is varied to reject defective rods, then the quality control is improved, but the cutting process is adversely affected due to speed changes
Solution Approach 1:
The conveying system is segmented into multiple independent conveying drums (first, second, and third conveying drums) that can operate at different speeds. This allows the cutting drum to rotate at a constant speed for quality cutting while other conveying drums can vary their speed to maintain productivity and handle defective rod rejection.
Solution Approach 2:
The system uses intermediate conveying drums as mediators between the rod storage and the cutting drum. These intermediate drums can vary their speed to handle defective rod rejection and maintain productivity, while the cutting drum maintains constant speed through direct driving, isolating the cutting process from speed variations.
4Device complexity
If the rod receiving process is coupled with the rod cutting process on a single drum, then the device complexity is reduced, but the adaptability deteriorates because both processes cannot operate independently
Solution Approach 1:
The system segments the rod receiving and cutting functions onto separate drums. The first conveying drum receives rods from storage, the second conveying drum transports them to the cutting position, and the third conveying drum receives cut segments. This segmentation allows each drum to operate independently at optimized speeds for its specific function.
Solution Approach 2:
The system introduces intermediate conveying drums as mediators between rod storage and the cutting drum. These intermediate drums buffer and transport rods, allowing the cutting drum to operate at a constant optimal speed while the receiving and conveying processes can vary their speeds independently to handle productivity requirements and defective rod rejection.
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
An apparatus (1) for manufacturing multi-segment articles comprising at least two feeding modules (20), the feeding module (20) being adapted to cut a rod (MA, MB, MC, MD) into segments (A, B, C, D) and to feed the segments (A, B, C, D) to an assembling unit (30), the assembling unit (30) being provided with assembling drums (31) and conveying drums (32) for receiving the segments (A, B, C, D) from the feeding modules (20) and forming a segment group (G1), a first wrapping module (40) for feeding a section of a first wrapping material (W1) and wrapping the segment group (G1) supplied from the assembling unit (30) so as to form a multi-segment rod (R), a cutting unit (50) for cutting the formed rod (R) into half multi-segment rods (R1, R2), an additional feeding module (70) for cutting an additional rod (ME) and feeding additional segments (E) between the half multi-segment rods (R1, R2), whereas the additional feeding module (70) comprises a cutting head (74), situated at the conveying drum (73), for cutting the rod into individual segments, and a second wrapping module (80) for feeding a section of a second wrapping material (W2) and wrapping the two half multi-segment rods (R1, R2) and the additional segment (E).