Production machine for producing rod-shaped products from an endless strand of a strip adhesively bonded to form a tube
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Solution Overview
Problem
Existing manufacturing machines for producing rod-shaped products from an endless strip glued to a tube face issues with contamination and quality deterioration due to cutting through adhesive seams that have not fully dried, leading to 'black particles' and compromised product quality.
Innovation Solution
A manufacturing machine with a device for applying glue intermittently to create regularly spaced glue-free sections, monitored by a sensor device, allowing for precise adjustment of glue-free section length and position, ensuring the cutting device cuts through these sections instead of the adhesive seam, thereby preventing contamination and improving glue application patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutting device cuts through the continuous adhesive seam, then the products can be cut from the endless strand, but glue particles and abrasive particles adhere to the cutting blade causing contamination and quality deterioration
Solution Approach 1:
The continuous adhesive seam is segmented into discrete adhesive sections separated by adhesive-free sections. This segmentation allows the cutting blade to pass through adhesive-free zones, eliminating particle adhesion while maintaining continuous production capability.
Solution Approach 2:
Adhesive-free sections are extracted from the continuous adhesive seam at regular intervals. These extracted zones serve as clean cutting zones where the blade encounters no adhesive, preventing contamination while the majority of the seam remains adhesive-bonded for structural integrity.
2Strength
If a continuous line of glue is applied to the strip, then strong bonding is achieved, but the glue line cannot dry completely before cutting leading to particle adhesion
Solution Approach 1:
The continuous glue line is segmented into discrete adhesive sections with adhesive-free intervals. This allows exposed adhesive surfaces to dry or cure during the adhesive-free zones before the next cutting operation, eliminating the need for extended drying time while maintaining bond strength.
Solution Approach 2:
The glue application operates periodically rather than continuously, with adhesive sections applied at regular intervals separated by adhesive-free sections. This periodic application rhythm allows sufficient drying/curing time between applications, preventing wet adhesive from being cut.
3Manufacturing precision
If the nozzle is arranged close to the roller to form a glue reservoir, then glue application quality is improved, but glue particles can adhere to the cutting blade
Solution Approach 1:
The glue reservoir function is maintained during adhesive sections but eliminated during adhesive-free sections. The nozzle is periodically retracted or closed during adhesive-free zones, preventing glue particle generation at the cutting location while preserving the reservoir benefit during bonding zones.
4Productivity
If the cutting device cuts through adhesive seams, then products are separated from the endless strand, but black particles contaminate subsequent products
Solution Approach 1:
The adhesive seam is segmented to create dedicated clean cutting zones. Products are separated at these adhesive-free sections where no glue particles are present, ensuring consistent product quality while maintaining high production speed through continuous cutting capability.
Solution Approach 2:
Adhesive-free sections act as intermediary zones between bonded sections. These zones serve as clean transition areas where cutting operations occur without contamination, mediating between the need for strong bonding and clean cutting surfaces.
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
The solution ensures higher product quality by avoiding contamination from glue and abrasive particles, maintaining a clean cutting surface, and allowing for the use of highly viscous glues with improved dimensional accuracy and faster drying, even at high production speeds.
Implementation Method 1
a sensor device (7) which is directed towards the endless strip (2) or the endless strand (9) and generates a signal depending on the passing of a glue-free section (14)
Implementation Method 2
the drying is additionally supported or ensured by a heat source directed at the glue line or at the subsequently produced glue seam
Data Source
Figure 1
Figure 2
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AI summary
The invention relates to a production machine (1) for producing rod-shaped products (3) from an endless strand (9) of an endless strip (2) adhesively bonded to form a tube (2), having an apparatus (15) for applying a line of glue (13) to a strip (2), a format portion (10) in which the endless strip (2) is formed into the endless strand (9) by shaping and adhesive bonding, and a cutting apparatus (4) which cuts the rod-shaped products (3) off the endless strand (9) at a predetermined length, wherein the apparatus (15) for applying the line of glue (13) is formed by an apparatus (15) which applies the glue intermittently, forming glue-free portions (14) that are spaced apart at regular intervals, and a sensor device (7) is provided, which is directed towards the endless strip (2) or the endless strand (9) and generates a signal in conjunction with the passage of a glue-free portion (14), and the apparatus (15) for applying the line of glue (13) is set up to change the length of the glue-free portions (14) in the longitudinal direction of the line of glue (13).