Helical Coil Bookbinding Machine with Adjustable Spine Formers
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Solution Overview
Problem
Existing machines for inserting plastic coils into books are limited in accommodating coil diameters between 30 to 50 mm, and lack integrated cutting and crimping capabilities, making them inefficient for handling a wider range of coil sizes and requiring manual tools for end processing.
Innovation Solution
A machine that adjusts spine former angles and pitch spacings to accommodate coils from 6 to 50 mm, using a semi-automatic system with manually adjustable spine formers and a side lay member to guide the coil insertion, and allows for manual cutting and crimping of coil ends, enhancing the range of book thicknesses and coil diameters it can handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing machines are used for coil insertion, then they can handle coils up to 20 mm or 30 mm, but they cannot operate with coils in the range 30 to 50 mm
Solution Approach 1:
The machine incorporates adjustable components including movable spine formers that can be repositioned along the book edge, and adjustable side lay members that can be rotated to different angles. These dynamic adjustments allow the same machine to accommodate coils of varying diameters (6 mm to 50 mm) by changing the geometric relationships between components, thereby extending the coil diameter range without requiring multiple fixed machines.
Solution Approach 2:
The invention changes key geometric parameters of the machine components: the angle of the side lay member can be adjusted from fixed to variable values, and the position of spine formers can be modified along the book edge. By varying these parameters, the machine can adapt to different coil sizes, transforming a machine limited to specific coil diameters into one capable of handling a broad spectrum from 6 mm to 50 mm.
2Productivity
If automated insertion systems are used, then production efficiency is improved, but the cost of the machine increases
Solution Approach 1:
The machine divides the coil insertion process into distinct functional segments: a drive system that rotates the coil, adjustable spine formers that guide the coil through the book holes, and a cutting/crimping device that processes the coil ends. This segmentation allows each component to be optimized independently and enables semi-automation where the drive system and cutting device are automated, while the spine formers remain manually adjustable, achieving a balance between productivity and cost.
Solution Approach 2:
The machine integrates multiple functions into a single device: coil insertion, end cutting, and end crimping are all performed by one machine. The adjustable spine formers serve both as guides for coil insertion and as structural supports for the cutting and crimping operations. This multi-functionality reduces the need for separate machines and lowers overall system complexity while maintaining high productivity.
3Device complexity
If manual insertion methods are used, then machine cost is reduced, but production efficiency decreases
Solution Approach 1:
The machine incorporates a drive system that automatically rotates the coil and feeds it through the book holes without requiring manual manipulation during the insertion process. The adjustable spine formers are designed to self-position and guide the coil as it is fed through, reducing the need for operator intervention. This self-service capability maintains relatively simple machine structure while significantly improving production efficiency compared to fully manual methods.
4Ease of operation
If integrated cutting and crimping devices are added, then coil end processing is automated, but device complexity increases
Solution Approach 1:
The machine combines the cutting and crimping functions into a single integrated device that processes both ends of the coil simultaneously. The cutting device includes blades that can shear the coil ends, and the crimping device includes members that can crimp the cut ends to secure them in place. By merging these functions into one assembly, the machine achieves automated end processing without requiring separate cutting and crimping machines, thereby limiting the increase in device complexity.
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 efficient insertion of coils across a broader diameter range (6 to 50 mm) and allows for manual end processing, improving the machine's versatility and usability in various production settings without the need for complex automation.
Implementation Method 1
the coil is engaged with a drive roller for rotating the helical coil about an axis of the coil parallel to the edge of the platen
Implementation Method 2
each spine former extending across the edge of the book and having an arced surface with an arced shape for shaping the edge of the book into the arced shape
Implementation Method 3
a side lay member so as to form said end into an inclined surface at a lay angle to a line at right angles to the platen so as to incline the holes at the angle to receive the turns of the coil
Data Source
AI summary
A helical coil is inserted into holes at an edge of a book by a machine which is adjustable for different diameters of coil. The face of the book sits on a platen and the coil is driven by a roller while the edge of the book is supported on a plurality of spine formers having an arced surface for shaping the edge of the book and an end of the book is engaged by a side lay member at an angle to incline the holes at the angle to receive the turns of the coil. The flat spine formers are carried on supports which rotate so as to allow the turns of the coil at the pitch angle to pass the spine formers. For different book thickness and coil diameter, the arced shape of the spine formers, the spine former angle and the lay angle are changed manually.