Flat-Bed Embossing Plate Induction Heating for Faster Tool Warm-Up
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Solution Overview
Problem
Conventional flat embossing machines with electrical resistance heaters require lengthy heating times, leading to increased downtime and energy consumption, and struggle to maintain uniform temperature across all embossing tools, affecting embossing quality and productivity.
Innovation Solution
The implementation of an induction heating device with a ferromagnetic tool plate and alternating magnetic field to directly heat the tool plate and embossing tools, allowing for precise temperature control and reduced heating times, while minimizing unnecessary heating of other machine parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electrical resistance heaters are used to heat embossing tools, then the embossing tools can be heated to operating temperature, but the heating time becomes very long (5-6 hours)
Solution Approach 1:
The patent replaces electrical resistance heating with induction heating technology. The induction heating device generates an alternating magnetic field that directly induces eddy currents in the embossing tools, converting electromagnetic energy directly into heat within the tool itself rather than using thermal conduction from a heating element. This substitution of heating mechanism dramatically reduces heating time from 5-6 hours to a fraction of that time.
Solution Approach 2:
The induction heating process utilizes electromagnetic vibration at high frequency to generate heat. The alternating magnetic field causes rapid oscillation of electrons within the embossing tools, creating intense friction and heat generation within the tool material itself. This vibrational heating mechanism is far more efficient than conventional resistance heating.
2Temperature
If electrical resistance heaters are used, then heating can be achieved, but energy consumption increases and temperature uniformity across tools is difficult to maintain
Solution Approach 1:
The induction heating device can target specific zones of the embossing tools independently through multiple heating zones or adjustable magnetic field distribution. Each area of the tool plate can be heated to the required temperature uniformly and simultaneously, ensuring consistent temperature across all embossing tools without the energy waste associated with heating entire machine components.
Solution Approach 2:
By replacing resistance heating with induction heating, the system achieves superior energy efficiency. The alternating magnetic field directly couples with the conductive embossing tools, transferring energy with minimal loss. This eliminates the inefficient thermal conduction process through air gaps and machine structures, significantly reducing overall energy consumption while improving temperature uniformity.
3Manufacturing precision
If the entire press head is heated by resistance heaters, then heating occurs, but unnecessary heating of machine parts causes thermal expansion and affects stamping accuracy
Solution Approach 1:
The induction heating system extracts and isolates the heating function to only the embossing tools themselves, rather than heating the entire press head. The alternating magnetic field is confined to induce currents specifically in the conductive embossing tools, leaving the surrounding machine structure at ambient temperature. This selective heating prevents unwanted thermal expansion of critical machine components and maintains stamping accuracy.
Solution Approach 2:
The heating effect is localized precisely to the embossing tools through controlled magnetic field generation. The induction heating device creates concentrated electromagnetic energy zones that only affect the intended tools, allowing different parts of the machine to maintain different temperature states - the tools are hot while the press head structure remains cool, preserving dimensional stability and accuracy.
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
This solution significantly reduces heating-up time, enhances temperature control precision, lowers energy consumption, and maintains consistent embossing quality, enabling faster adjustment and changeover times and increased productivity for demanding tasks.
Implementation Method 1
a heating device for heating the at least one embossing tool
Implementation Method 2
The inductor is designed and arranged between the tool plate side and the back of the base plate in such a way that an alternating magnetic field extending beyond the base plate on the tool plate side can be generated for inductive heating
Implementation Method 3
heating the embossing tools to operating temperature using such resistance heaters is very time-consuming. It is not uncommon for several hours, e.g., 5 to 6 hours, to pass between the time the heating device is switched on and reaching the optimal operating temperature. This is primarily because the thermal energy from the heating element of the resistance heater must first be transferred via heat conduction into the tool plate and then, via this, into the embossing tools mounted on the tool plate.
Data Source
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AI summary
The invention relates to a flatbed embossed-printing machine (1) containing: a die plate (20) with a die face (36) for receiving at least one embossing die (23) and a die-plate rear face (35) lying opposite the die face (36), in addition to a main plate (10) comprising a die-plate face (12) facing the die-plate rear face (35) and a main-plate rear face (11) which lies opposite the die-plate face (12) and is used to transfer an embossing force exerted on the die plate (20) between the die-plate face (12) and the main-plate rear face (11); and also an induction heating device (3) for heating the at least one embossing die (23). The induction heating device (3) contains an inductor (16) which is designed and arranged between the die-plate face (12) and the main-plate rear face (11) such that a magnetic alternating field (19) extending beyond the main plate (10) can be generated on the die-plate face (12) in order to inductively heat an inductively heatable die plate (20) on the other side of the die-plate face (12) and outside the main plate (10).