Heating Device Airflow for Uniform Semi-Finished Product Heating
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Solution Overview
Problem
Existing heating devices for producing molded parts are inefficient in terms of energy usage and result in inhomogeneous temperature distribution, leading to higher production costs and suboptimal heating outcomes.
Innovation Solution
A method and device that utilize an airflow counteracting thermal convection within the heating device, regulated by temperature differences and controlled using ventilators or compressed air, to maintain a constant interior temperature and achieve homogeneous heating of semi-finished products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a closed housing with radiant heaters is used for heating semi-finished products, then energy efficiency is improved, but inhomogeneous temperature distribution and excessive heating of the housing interior occur
Solution Approach 1:
A reflective shielding element is introduced as an intermediary between the radiant heater and the housing interior. This shielding element reflects thermal radiation away from the housing walls, preventing excessive heating of the housing interior while maintaining effective heating of the semi-finished product. The shielding element acts as a mediator that directs thermal energy selectively toward the product rather than uniformly heating the entire housing space.
Solution Approach 2:
The heating system is designed to provide localized heating quality differentiation. The radiant heater delivers concentrated thermal energy to the semi-finished product with high intensity, while the reflective shielding element creates a zone of reduced thermal exposure for the housing interior. This local quality control ensures that different regions (product vs. housing) receive appropriate temperature treatments.
2Power
If radiant heaters are used in a closed housing, then heating effectiveness is improved, but inhomogeneous temperature distribution arises inside the housing
Solution Approach 1:
The reflective shielding element serves as a mediator that redistributes thermal radiation patterns within the housing. It reflects excess radiation away from certain areas and directs it toward others, creating a more uniform temperature distribution across the housing interior while preserving the high heating effectiveness needed for the semi-finished product.
Solution Approach 2:
The system employs dynamic control of the reflective shielding element to adapt to different heating requirements. By adjusting the position or orientation of the shielding element, the system can dynamically optimize both heating effectiveness and temperature uniformity for different product types, sizes, and material properties.
3Speed
If the housing interior is strongly heated during operation, then rapid heating of semi-finished products is achieved, but energy loss increases and temperature control becomes difficult
Solution Approach 1:
The reflective shielding element acts as a thermal mediator that directs radiant energy preferentially toward the semi-finished product rather than allowing uniform dispersion throughout the housing. This maintains rapid heating speed for the product while reducing overall energy consumption by minimizing unnecessary heating of the housing interior and air spaces.
Solution Approach 2:
The system changes the thermal radiation parameters within the housing by introducing the reflective shielding element. This modifies the radiation pattern, intensity distribution, and thermal field characteristics to achieve faster product heating with reduced total energy input and improved temperature control capability.
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 enables energy-efficient and uniform heating of semi-finished products, reducing production costs and ensuring consistent temperature distribution across the entire surface, thereby improving the quality of molded parts.
Implementation Method 1
an airflow that counteracts the thermal convection is generated inside of the housing, in particular an airflow directed essentially from the top down inside of the housing
Implementation Method 2
The semi-finished product is exposed to the thermal radiation generated by the radiant heaters and heated
Data Source
AI summary
The invention relates to a method for producing molded parts, wherein semifinished product is heated in a heating device and is subsequently fed to a shaping machine. The heating device has a closed housing having a door or has a separately closable opening. The heating device optionally has a dividable housing, in the case of which the housing components can be moved away from each other in order to form an opening and can be moved toward each other in order to form a closed housing. One or more radiant heaters, in particular infrared radiant heaters, are provided in the interior of the housing. Semifinished product is introduced into the interior of the housing and radiant heat produced by the radiant heaters is applied thereto, said semifinished product is heated, and said semifinished product is subsequently removed from the housing. Thermal convection, which is directed substantially upward in the housing, is produced in the interior of the housing. According to the invention, an air flow counteracting the thermal convention, in particular an air flow directed substantially downward in the interior of the housing, is produced in the interior of the housing.