Butyl Sealing Tape Extrusion Speed Differential Stabilization
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Solution Overview
Problem
Producing butyl sealing tapes with diameters less than 4 mm is challenging due to their low weight, which causes them to adhere poorly to liners and slip off during the manufacturing process.
Innovation Solution
A device with an extrusion unit, liner feed, and transport system where the liner is fed at the same speed as the nozzle unit's delivery speed, and the transport means moves at a higher speed than both, creating a relative speed that stabilizes the liner and prevents slippage, allowing for efficient application and packaging of small-diameter sealing tapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If sealing tapes with diameter less than 4 mm are produced, then the product size is reduced for specific applications, but the tapes slip off the liner during manufacturing due to low weight
Solution Approach 1:
The patent applies dynamics by varying the conveying speed of the liner through different device sections. The liner is conveyed at a first speed during application and at a second, higher speed during transport. This speed variation creates relative motion that presses the sealing tape against the liner, preventing slippage while enabling production of small-diameter tapes with diameter less than 4 mm.
2Reliability
If the liner is conveyed at high speed to prevent slippage, then the stability of small-diameter sealing tapes is improved, but the synchronization with the nozzle unit becomes difficult
Solution Approach 1:
The system dynamically adjusts conveying speeds at different stages. The liner feed device conveys the liner at a first speed that synchronizes with the nozzle unit's dispensing speed during application. Downstream, the transport device conveys the liner at a second, higher speed to stabilize the sealing tape. This dynamic speed variation resolves the contradiction between synchronization requirements and stability needs.
Solution Approach 2:
The conveying system is segmented into distinct sections with different speed characteristics. The liner feed device operates at one speed regime during application, while the transport device operates at a higher speed regime during transport. This segmentation allows each section to be optimized for its specific function without compromising the other.
3Reliability
If the transport means moves faster than the liner feed device, then the sealing tapes are stabilized and slippage is prevented, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic speed control system where the transport means operates at a second speed higher than the first speed of the liner feed device. This speed differential is maintained consistently during operation, creating a relative motion effect that stabilizes the sealing tape on the liner without requiring complex real-time adjustment mechanisms.
Data Source
Figure 1
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Figure 4~5
AI summary
The invention relates to improvements in the technical field of manufacturing sealing tapes, in particular the manufacture of butyl sealing tapes. For this purpose, the device (1) is specifically proposed, comprising the extrusion device (2), a die unit (3), a liner feed device (4), and a transport device (6). The conveying speed of the liner feed device (4) is as high as the discharge speed of the die unit (3), so that a liner fed at the conveying speed can be coated with at least one sealing tape in a continuous pass through the die unit (3).The movement speed of a transport means (7) of the transport device (6), to which the liner equipped with at least one sealing strip is transferred, is greater than the conveying speed of the liner feeding device (4) and greater than the delivery speed of the nozzle unit (3), with which the at least one sealing strip is applied to the liner.