Shoe Upper Decoration Molding with Indirect Infrared Heating
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Solution Overview
Problem
Existing hot pressing machines for shoe upper decoration suffer from direct heat transmission to the shoe mould, leading to deformation and reduced efficiency, due to the use of contact heaters.
Innovation Solution
A device employing suspended indirect heating with upper and lower silica gel sheets separated from infrared heaters, along with lateral air suction and positive pressure to form shoe upper decorations without direct contact, preventing deformation and improving molding quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If contact heaters are used in the hot pressing machine, then heating efficiency is improved, but the shoe upper decoration deforms due to direct heat transmission
Solution Approach 1:
The patent introduces an air layer as an intermediary medium between the heater and the shoe upper decoration. This air gap prevents direct thermal contact, acting as a thermal barrier that mediates heat transfer. The heater warms the air, which then indirectly heats the decoration through convection and radiation, avoiding direct heat transmission that causes deformation.
Solution Approach 2:
The patent extracts the direct thermal contact between the heater and the shoe upper decoration by introducing a suspended heating structure. The heater is separated from the decoration surface, removing the harmful direct heat transmission while maintaining the beneficial heating effect through indirect thermal transfer mechanisms.
2Speed
If direct heating is applied to the shoe upper, then heating speed is improved, but softening and deformation of decorative patterns occur
Solution Approach 1:
The air layer serves as a buffer that slows down direct heat transmission while maintaining heating effectiveness. This intermediary allows heat to be transferred more gradually through convection and radiation, preventing sudden thermal shocks that cause softening and deformation of the decorative patterns.
Solution Approach 2:
The patent changes the thermal transfer parameters by introducing a suspended heating structure with controlled air gaps. This modifies the heat transfer mechanism from direct conduction to indirect convection and radiation, altering the temperature distribution profile to prevent localized overheating that causes pattern deformation.
3Use of energy by moving object
If contact heating is used, then energy transfer is efficient, but non-conforming products increase
Solution Approach 1:
The air gap acts as a controllable intermediary that allows energy transfer while preventing harmful direct contact. This mediator enables uniform energy distribution across the decoration surface through convection currents and infrared radiation, reducing hot spots and ensuring consistent heating that produces conforming products.
Solution Approach 2:
The patent replaces direct mechanical thermal contact with a field-based heating approach using infrared radiation and convection. This substitution eliminates the mechanical contact that causes deformation while maintaining effective energy transfer through electromagnetic and fluid dynamic fields.
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 solution effectively prevents deformation and enhances molding efficiency by using indirect heating and lateral air suction, reducing the likelihood of non-conforming products and improving the overall quality of shoe upper decorations.
Implementation Method 1
The heater is an infrared heater
Implementation Method 2
capable of being connected to or disconnected from the upper mould, and including two lower mould members
Implementation Method 3
a step of air blowing including applying pressure, by a positive pressure air source, to the upper silica gel sheet
Data Source
AI summary
A method and a device for forming shoe upper decoration essentially include a machine, an upper mould and a lower mould. The upper and lower silica gel sheets are separated from the upper and lower heaters by a distance, which provides a suspended indirect heating mode to prevent the upper of the shoe from being deformed by the direct heating of the heat source, and to achieve the purpose of reducing the possibility of non-conforming products.