Particle Foam Molded Body Thermal Conduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing shaped bodies from foamable plastic granulate require separate drying processes due to moisture introduction during foaming, and the mold cavities are not completely sealed, leading to inefficiencies and inhomogeneities in the final product.
Innovation Solution
The method involves transferring heat to the mold cavity through its walls by conduction and/or radiation, eliminating the need for media inside the cavity, and using a closable mold to maintain a dry and sealed environment for foaming, allowing for the production of homogeneous particle foam structures with controlled thermal energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If steam nozzles feed superheated steam into the mold cavity from heating chambers, then the foaming process can be carried out, but moisture is introduced into the molded body requiring separate drying processes
Solution Approach 1:
The invention extracts the harmful moisture introduction by replacing steam injection with alternative heating methods (heating plates or heating elements) that contact the mold cavity walls without introducing media into the cavity, thus achieving foaming temperature control without moisture contamination
Solution Approach 2:
The mold cavity walls serve as an intermediary medium, transferring thermal energy from external heating sources to the particle foam material through the wall structure, avoiding direct contact between heating media and the foam material
2Temperature
If steam nozzles are used for heating during foaming, then heat can be supplied, but inhomogeneities arise in the shaped body due to local steam supply openings
Solution Approach 1:
The invention applies heating uniformly across the entire mold cavity wall surface rather than at localized steam nozzle positions, ensuring even heat distribution and preventing local inhomogeneities in the foamed structure
Solution Approach 2:
The heating function is distributed across multiple heating zones in the mold cavity walls rather than concentrated at single steam nozzle locations, achieving uniform thermal field through segmented heating areas
3Ease of manufacture
If the mold cavity is not completely closed off, then filling with granules is easier, but the particle foam material cannot remain dry during heating
Solution Approach 1:
The invention removes the steam injection system that caused moisture introduction while maintaining cavity closure, allowing the cavity to be sealed during heating without media introduction, thus keeping the foam material dry
Solution Approach 2:
The mold cavity is closed off before the heating process begins, creating a sealed environment that prevents moisture contamination during subsequent heating and foaming operations
4Temperature
If steam is fed into the mold cavity for heating, then foaming can occur, but surface markings arise on the molded part due to steam nozzle contact
Solution Approach 1:
The invention extracts the steam nozzle system that caused surface markings and replaces it with external heating methods (heating plates or elements) that transfer heat through the mold walls without contacting the foam material or leaving surface impressions
Solution Approach 2:
The mold cavity walls act as an intermediary between the heating source and the particle foam material, transferring thermal energy without direct contact, thus preventing surface markings while maintaining effective heating
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 approach ensures the particle foam material remains dry, prevents inhomogeneities, and allows for the production of functionalized particle foam structures with anisotropic properties, enabling the creation of cohesive connections and complex geometries without the need for additional drying or moisture control.
Implementation Method 1
Heat is transferred from the wall to the interior by conduction
Implementation Method 2
Heat is transferred from the wall to the interior by conduction and/or radiation
Implementation Method 3
the granules are foamed by the blowing agent contained therein by means of the thermal energy introduced
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a method for producing a molded body (7) from a particle foam material in a closable mold cavity (6) of a molding tool (1), having the following steps: (a) introducing the particle foam material in the form of granulate (8) into the mold cavity (6) of the molding tool (1), (b) closing the mold cavity (6), and (c) heating the molding tool (1) and the granulate (8) contained therein, whereby the particles of the granulate (8) are connected together. The aim of the invention is to reduce the production complexity and achieve a homogenous and highly valuable molded body. This is achieved in that during step (c), heat energy is introduced into the interior of the mold cavity (6) solely through the wall of the mold cavity (6), wherein the heat energy passes from the wall of the mold cavity (6) into the interior of the mold cavity (6) in a convection-free manner, preferably by means of heat conduction and/or heat radiation.