Booklet Pressing Plate Control for Uniform Adhesive Bonding
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Solution Overview
Problem
Existing booklet creating apparatuses face issues with plastic deformation of pressing plates when handling multiple sheet sizes, leading to uneven heat distribution and impaired adhesive bonding, particularly when processing small-size papers.
Innovation Solution
A booklet creating apparatus with a heating-and-pressing unit that includes a controller to adjust temperature and pressure based on sheet size, ensuring uniform adhesive bonding by minimizing plastic deformation of the pressing plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the heating-and-pressing unit is designed to handle maximum size sheets, then large-size paper processing capability is improved, but pressing plate deformation occurs when processing small-size paper
Solution Approach 1:
The pressing plate is designed with elastic deformation capability, allowing it to dynamically adapt its shape based on the sheet size being processed. The plate elastically deforms to match the smaller surface area of small-size sheets while maintaining contact with the heating entity, preventing gaps and ensuring uniform heat distribution across different sheet dimensions.
2Manufacturing precision
If uniform pressing force is applied to large-size sheets, then heat distribution is improved, but plastic deformation occurs at edge portions of small-size sheets
Solution Approach 1:
The pressing force distribution is made non-uniform based on the sheet size being processed. For small-size sheets, the pressing force is concentrated on the active pressing area that matches the sheet dimensions, while edge regions experience reduced or zero force. This local adaptation prevents plastic deformation at sheet edges while maintaining sufficient pressure for adhesive bonding in the bonding region.
3Strength
If high temperature is applied for adhesive bonding, then bonding strength is improved, but pressing plate deformation increases
Solution Approach 1:
The pressing temperature is dynamically adjusted based on the sheet size being processed. For small-size sheets, the temperature is reduced to prevent excessive thermal expansion and plastic deformation of the pressing plate, while still maintaining sufficient heat for adhesive bonding. For larger sheets, higher temperatures can be applied as the plate maintains better dimensional stability.
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 apparatus maintains good adhesive bonding properties across various sheet sizes by controlling temperature and pressure, preventing gaps and ensuring consistent heat transfer during the bonding process.
Implementation Method 1
The heating entity is configured to heat the pressing plate at a predetermined temperature
Implementation Method 2
The pressing mechanism is configured to apply pressure to the sheets sandwiched between the pressing plate and the receiving member
Data Source
AI summary
A booklet creating apparatus includes a heating-and-pressing unit and a controller. The heating-and-pressing unit heats and presses adhesive layer in a state in which plural sheets, with the adhesive layer formed thereon, are stacked. The controller performs control in such a way as to make a predetermined temperature and/or pressure lower when heating and pressing sheets of minimum size than when heating and pressing sheets of maximum size.