Image-Forming Sheet Bonding with Temperature-Based Heat Control
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Solution Overview
Problem
Image forming apparatuses that use powder adhesive for bonding sheets incur higher power consumption due to the need for heating, as compared to traditional stapling processing.
Innovation Solution
An image forming apparatus that controls the heating temperature and duration in the thermocompression bonding unit based on the pre-processing temperature of sheets, estimated using the temperatures of components like the pressing roller, heating film, and environmental conditions, to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sheets are heated to bond using powder adhesive, then bonding strength is achieved, but power consumption increases
Solution Approach 1:
The invention applies preliminary action by pre-heating sheets to a specific temperature range (50°C to 100°C) before the bonding process. This pre-heating is performed using residual heat from the fixing device or a dedicated pre-heating unit, preparing the sheets in advance so that less additional heat is needed during bonding, thereby reducing overall power consumption while maintaining bonding strength
Solution Approach 2:
The invention changes the temperature parameter strategy by using different temperature stages: pre-heating to 50-100°C followed by bonding at 100-200°C. This parameter optimization allows the bonding process to use lower temperatures and shorter times compared to conventional methods, reducing energy consumption while achieving adequate adhesive activation and bonding strength
2Strength
If heating temperature and duration are increased, then adhesive strength improves, but energy waste increases
Solution Approach 1:
The invention implements dynamic control of heating parameters by adjusting both temperature and duration based on real-time conditions. The bonding temperature is controlled at 100-200°C for 1-10 seconds, with the ability to adapt parameters according to sheet pre-processing temperature, adhesive type, and environmental conditions, optimizing energy efficiency while maintaining bonding quality
Solution Approach 2:
The invention uses feedback mechanisms by monitoring sheet temperature (via thermometers or thermal sensors) and adjusting heating parameters accordingly. The control unit receives temperature information and modifies heating power and duration to achieve optimal bonding with minimum energy input, preventing both under-heating and excessive energy consumption
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
Reduces power consumption in the bonding process by optimizing heat application, maintaining adequate adhesive strength while minimizing energy use.
Implementation Method 1
it is necessary to heat sheets to which powder adhesive has been applied
Implementation Method 2
a bonding unit configured to heat and press the plurality of sheets based on a temperature of the plurality of sheets before the bonding processing
Data Source
Figure 1
Figure 2~3A
Figure 3B~3C
AI summary
An image forming apparatus includes image forming means arranged to form an image including an adhesive image by powder adhesive on a sheet that is conveyed; bonding means (50) , to which sheets on which the image has been formed by the image forming means are conveyed in order, arranged to, by heating a plurality of sheets conveyed to and stacked in the bonding means, bond the plurality of sheets, using adhesive images formed on the plurality of sheets; and control means (100) configured to evaluate a temperature of the plurality of sheets conveyed to the bonding means and, based on the evaluated temperature, control an amount of heat to be applied to the plurality of sheets by the bonding means heating the plurality of sheets.