Inductor Design for Vulcanizing Presses Reducing Heat Transmission
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Solution Overview
Problem
Vulcanizing presses using electromagnetic induction for tire manufacturing face issues with high heat transmission to the armature, leading to costly materials and noise/wear due to magnetic field interactions and asymmetric thermal expansion, causing inductor movement and increased maintenance costs.
Innovation Solution
The design incorporates an inductor with reduced surface area connecting elements and air spaces between the inductor soles and the component, along with elongated legs to minimize heat transfer and stabilize the inductor, using aramid connecting elements to absorb vibrations and reduce noise and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the inductor is placed in contact with the component to effectively complete the magnetic field loop, then heating efficiency is improved, but heat transmission to the armature increases and noise/wear worsen
Solution Approach 1:
The patent introduces non-conductive spacers as intermediary elements between the inductor armature and the component being heated. These spacers maintain the magnetic field loop effectiveness while preventing direct thermal contact, thus reducing heat transmission to the armature and its coil.
Solution Approach 2:
The patent segments the contact interface by introducing discrete spacer elements at specific locations rather than continuous contact. This segmentation allows the magnetic field to remain effective while creating thermal barriers at critical heat transmission points.
2Use of energy by moving object
If the inductor is placed in contact with the component to complete the magnetic field loop, then heating efficiency is improved, but noise and wear increase due to magnetic forces
Solution Approach 1:
The non-conductive spacers act as mediators that prevent direct mechanical contact between the inductor armature and the component. This eliminates the noise and wear caused by magnetic attraction and repulsion forces while maintaining the electromagnetic heating function.
Solution Approach 2:
The spacers provide beforehand cushioning by pre-positioning the inductor at an optimal distance from the component. This prevents direct impact and mechanical stress caused by alternating magnetic forces, reducing noise and wear before they can occur.
3Area of stationary object
If the armature follows the shape of the component with planar soles in contact, then heating coverage is improved, but asymmetric thermal expansion causes movement and noise
Solution Approach 1:
The patent segments the continuous contact surface into discrete contact points using spacers. This segmentation allows the armature to maintain heating coverage while reducing the constraints that cause noise and movement during thermal expansion.
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 configuration reduces noise levels below 70 decibels, minimizes wear, and extends the lifespan of components by allowing for independent replacement of connecting elements, while maintaining effective heating efficiency.
Implementation Method 1
heat the vulcanizing press using electromagnetic induction
Implementation Method 2
under the effect of the variable magnetic field and of the magnetic hysteresis of the components that are to be heated
Implementation Method 3
the space between the sole and the component limits the area of contact between the two... the noise and wearing of the surfaces of the armature that are in contact with the component are thus limited
Data Source
AI summary
The vulcanizing press for curing green tire blanks having:a component,at least one inductor comprising an armature having two free ends exhibiting soles which are able to close an electromagnetic loop through the component, andfor each sole, at least one connecting element connecting the sole to the component and forming between the two of them at least one space, the connecting element or elements associated with the sole occupying in total less than half of a length of the sole.