Binding Machine Notching Tool for Clean Spine Adhesive Grooves
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Solution Overview
Problem
Existing notching devices in bookbinding machines tend to tear paper during the engraving process, leading to incomplete adhesive penetration, insufficient sealing, and the presence of protruding material, which results in corrugations on the cover.
Innovation Solution
A notching device with engraving tools featuring a cutting edge that includes a first cutting portion for making notches and second cutting portions to trim excess material, aligned and parallel to the upper face, ensuring complete removal of torn paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the front face of the engraving tool is inclined towards the upper surface of the plate to facilitate entry into the back of the block, then the tool can easily enter the block, but the tool tends to tear the paper resulting in excess material protruding from the back
Solution Approach 1:
The cutting edge is divided into multiple segments: a first segment with an inclined front face for easy entry, and a second segment with a perpendicular face for clean cutting. This segmentation allows each segment to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different portions of the cutting edge have different geometric properties tailored to specific functions: the first portion has an inclined face for penetration, while the second portion has a perpendicular face for precise cutting. This local differentiation resolves the contradiction between ease of entry and cutting precision.
2Productivity
If the engraving tool has a sharp profile to remove chips continuously, then the cutting action is effective, but the sharp profile is not conformed to avoid tearing of the paper
Solution Approach 1:
The cutting edge is segmented into a first portion for initial engagement and a second portion for final cutting. The second portion has a perpendicular face that provides a clean cutting action to prevent paper tearing while maintaining effective chip removal.
Solution Approach 2:
The geometry of the cutting edge is changed from a uniformly sharp profile to a multi-faceted profile with different angles. The perpendicular face of the second portion changes the cutting parameter to prevent paper tearing while maintaining productivity.
3Strength
If the notching device creates notches to increase adhesive contact surface area, then the bonding strength is improved, but torn paper and excess material remain embedded in the glue causing corrugations on the cover
Solution Approach 1:
The cutting edge has different local qualities: the first portion creates the notch geometry for adhesive retention, while the second portion with its perpendicular face ensures clean edges without paper tearing. This local differentiation eliminates harmful factors while maintaining bonding strength.
Solution Approach 2:
The design converts the potential harm of paper tearing into a benefit by using the perpendicular face of the second portion to prevent tearing at the critical edges, ensuring that only clean-cut notches are created that will not generate harmful embedded material.
Data Source
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AI summary
A notching device (1) for binding machines (2), suitable for automatically creating on the back (D) of blocks (B) of sheets (5) a plurality of notches (T) intended to collect an adhesive for gluing a cover. The notching device (1) comprises a plate (8) defining a main axis (V) and having an upper face (9) facing the back (D) to be engraved and one or more engraving tools (13) which can be anchored to the upper face (9) to make notches (T) on the back (D) by rotating the plate (8). Each engraving tool (13) comprises a body (14) with an end (15) provided with a cutting edge (16) which comprises a first cutting portion (18) having a shape complementary to the notch (T) to be made and second cutting portions (19A, 19B) adjacent to and placed on the sides of the first portion (18) to trim the back (D) and remove the excess material generated by the first portion (18), and wherein the second cutting portions (19A, 19B) are substantially aligned and parallel to the upper face (9).