Double Bonding Web Splicing Device for Gap-Free Strip Joining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for connecting narrow strips of cardboard or semi-rigid materials by gluing end to end often result in gaps, overlaps, or sharp edges, leading to degradation of the bond and potential separation of the strips, disrupting the continuous feeding in production lines.
Innovation Solution
A method and device that utilize double gluing with two single-sided adhesive tapes applied on both internal and external faces of the strip ends, ensuring precise alignment and pressure application to eliminate gaps and overlaps, enhancing the resistance and durability of the joint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If single-sided adhesive tape is used to connect strip ends, then the connection process is simple, but the joint strength is insufficient and gaps or overlaps occur
Solution Approach 1:
The single adhesive tape is divided into two separate tapes: a first tape applied to the external face and a second tape applied to the internal face. This segmentation allows each tape to independently bond to its respective surface, eliminating gaps and overlaps while maintaining connection simplicity.
Solution Approach 2:
The solution transitions from a single-plane adhesive application to a dual-plane approach by applying adhesive tapes to both the external and internal faces of the strip ends. This dimensional expansion ensures complete surface coverage and eliminates the gap/overlap problem inherent in single-sided bonding.
2Manufacturing precision
If precise alignment is required to avoid gaps and overlaps, then joint quality improves, but the alignment process becomes more complex
Solution Approach 1:
Adhesive tapes are pre-applied to the strip ends before the actual connection operation. This preliminary action ensures that the adhesive is already in position, eliminating the need for precise real-time alignment during the bonding process and reducing operational complexity.
Solution Approach 2:
The adhesive tapes are applied to specific localized areas (external face and internal face) of the strip ends. This localized adhesive application ensures precise bonding zones without requiring complex overall alignment mechanisms, as each tape independently secures its respective surface.
3Ease of manufacture
If adhesive tape is applied to only one face, then the application process is simple, but the connection reliability is reduced due to potential detachment
Solution Approach 1:
The bonding system is segmented into two independent adhesive tapes applied to opposite faces. This segmentation creates redundant bonding paths, where if one bond experiences stress or detachment, the other bond maintains connection reliability without complicating the application process.
Solution Approach 2:
By applying adhesive tapes to both faces beforehand, the system creates a cushioning effect where the dual-adhesive configuration compensates for potential bonding failures. This prior preparation ensures that even if one adhesive bond weakens, the connection remains reliable.
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 method and device ensure a strong, gap-free connection that prevents detachment, tearing, or separation of the strips, maintaining continuous feeding and reducing production costs by reinforcing the joint with overlapping adhesive coverage.
Implementation Method 1
the latter comprises at least one suction opening of a suction cup making it possible to retain by suction the face external of said end applied against the support face
Implementation Method 2
fixing between them of their respective connection ends by means of a single-sided adhesive tape which has an adhesive side which is intended to be applied with pressure on the external faces of the two connecting ends
Data Source
Figure 1a~1c
Figure 1d~1f
Figure 1g~1h
AI summary
The present invention relates to a method for joining strips end-to-end by double gluing, enabling the automatic joining of a connecting end (3) of an upstream strip (1) with a connecting end of a downstream strip (2). It consists of using a cutting head (11, 12), two adhesive tapes, and two support surfaces that move in translation towards each other—namely, a first support surface (9a) of the connecting end (3) of the upstream strip equipped with the first tape and a second support surface (10a) of the second tape—cutting the downstream strip, then moving said surfaces in a joining plane to glue and apply each tape with pressure to one of the external or internal faces of the two respective connecting ends on either side of their adjoining edges.