Heat-Sealable Strip Splicing With Buffer and Preparation Roller
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Solution Overview
Problem
Existing splicing units and strip application apparatuses for sealing strips in packaging machines are not economical and easy to manufacture, necessitating improvements for seamless operation without interrupting production.
Innovation Solution
A splicing unit and apparatus for applying a sealing strip to a web of packaging material, featuring a strip splicing device that seamlessly splices new sealing strips to the existing ones, a buffer device to maintain continuous operation, and a preparation roller to stabilize the new strip before splicing, ensuring efficient and uninterrupted production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a splicing unit is designed to splice sealing strips seamlessly without interrupting production, then productivity is improved, but device complexity increases
Solution Approach 1:
The splicing unit is divided into functionally independent modules: a buffer device with buffer rollers for storing excess sealing strip, a splicing device with heating and pressing elements for joining strips, and a cutting device for separating strips. This segmentation allows each module to perform its specific function efficiently while maintaining overall system continuity, resolving the contradiction between productivity and complexity.
Solution Approach 2:
The buffer device accumulates a portion of the sealing strip in advance before splicing is needed, creating a buffer stock that allows the splicing operation to occur without interrupting the continuous feeding of sealing strips to the packaging process. This preliminary action ensures productivity is maintained while enabling the complex splicing function.
2Ease of manufacture
If existing splicing units are used, then sealing strip application can continue, but manufacturing cost and complexity increase
Solution Approach 1:
Instead of attempting to splice sealing strips while they are under tension in the continuous feeding path, the invention inverts the approach by using a buffer device to release strips from a stored position. This allows splicing to occur in a relaxed, controlled state where new strips can be easily joined to the end of used strips, then fed into the packaging process, thereby simplifying manufacturing while ensuring reliable seamless operation.
3Productivity
If the sealing strip is spliced while under tension during continuous operation, then productivity is maintained, but splicing quality and reliability deteriorate
Solution Approach 1:
The buffer device acts as an intermediary between the sealing strip supply and the packaging process. It absorbs the tension and motion variations by storing excess strip and releasing it at a controlled rate, allowing the splicing operation to occur under stable, low-tension conditions while maintaining continuous production throughput. This mediator role resolves the contradiction between productivity and splicing quality.
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 easy and economical manufacturing of splicing units and apparatuses, allowing for continuous operation of packaging machines without interruptions, enhancing the sealing strip application process.
Implementation Method 1
a preparation roller to convey the new strip to a splicing position
Implementation Method 2
a splicing device to splice the new sealing strip to the end of the existing sealing strip
Implementation Method 3
a buffer device to buffer the sealing strip
Data Source
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AI summary
There is described a splicing unit (18) for splicing a new sealing strip (13*) of heat-sealable material to a sealing strip (13) in use when the sealing strip (13) in use is about to exhaust, the splicing unit (18) comprising a sealing device (27) configured to seal the new sealing strip (13*) and the sealing strip (13) in use to one another and an advancement device (31) configured to convey the new sealing strip (13*) along a conveying path (Q*) towards the sealing device (27). The advancement device (31) is provided with a preparation roller (32) configured to accommodate the new sealing strip (13*) in preparation for splicing to the sealing strip (13) in use; the preparation roller (32) comprises a lateral surface (35) and a ridge element (50) protruding from the lateral surface (35), the ridge element (50) comprises ridge portions (36) arranged side by side, and spaced apart from one another so as to define a passage (P) for the new sealing strip (13*).