Extrusion Die Temperature Control for Plastic Profile Wall Thickness
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Solution Overview
Problem
Existing methods for producing plastic profiles, such as window frame profiles with wall hooks, face inefficiencies in material usage due to inadequate geometric control during extrusion, leading to suboptimal material savings.
Innovation Solution
Implementing a temperature control system with a channel of high thermal conductivity, such as copper, within the extrusion tool, allowing for precise curvature-adapted temperature control over an angle of at least 30°, enabling targeted heating or cooling of web-shaped projections to optimize wall thickness and reduce material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If standard extrusion with uniform temperature control is used, then the wall thickness is sufficient for wall hook stability, but the overall profile consumes more plastic material than necessary
Solution Approach 1:
The patent applies local quality by implementing region-specific temperature control in the extrusion die, where different zones (web-shaped projection areas versus other areas) are controlled at different temperatures. This allows the wall thickness to be optimized locally - thinner where strength requirements are lower, and sufficient where wall hooks need stability - thereby reducing overall material consumption while maintaining structural integrity.
Solution Approach 2:
The extrusion die is segmented into multiple temperature control zones, with at least one zone dedicated to controlling the wall thickness of web-shaped projections. This segmentation enables independent temperature management for different profile sections, allowing precise control over material distribution and wall thickness in critical areas versus non-critical areas.
2Loss of substance
If targeted temperature control is applied to wall hook areas, then material savings are achieved, but the geometric requirements of individual web-shaped projections are not sufficiently considered
Solution Approach 1:
The patent enhances local quality by providing at least one dedicated temperature control zone for each web-shaped projection area, allowing the wall thickness and geometry of each projection to be precisely controlled according to its specific geometric requirements. This goes beyond generic regional control and addresses the unique needs of individual projection geometries.
Solution Approach 2:
The temperature control system is designed to be dynamically adjustable, allowing the temperature in each zone to be independently controlled and modified. This enables the extrusion process to adapt to different profile geometries and requirements, optimizing both material usage and geometric precision for various web-shaped projections.
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 allows for precise control of wall thickness, maximizing material savings by ensuring the wall hooks meet strength requirements while minimizing overall plastic material usage, and can be applied to various web-shaped areas of profiles.
Implementation Method 1
the channel transports the heat of the heating medium or the cold of the cooling medium to the inner wall of the extrusion die
Implementation Method 2
Heating the relevant section of the mold reduces the viscosity of the plastic melt locally, thereby increasing the melt flow, which results in a locally increased wall thickness
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a method for producing a plastic profile (2) with at least one web-shaped projection (4), in particular a window or door hollow chamber profile (1), by means of an extrusion process, wherein, in the extrusion process for profile forming, plastic melt is guided through an extrusion die (5), wherein during the extrusion process, the wall thickness of the plastic extrusion profile (2) is selectively and locally influenced by temperature control in at least one temperature control section (6) of the extrusion die (5), wherein the temperature control section (6) is assigned to a single web-shaped projection (4) of the plastic extrusion profile (2), and wherein, for the local influence on the wall thickness per temperature control section (6), at least one temperature control device (7) is provided in the extrusion die (5), by means of which the inner wall of the extrusion die (5) in the temperature control section (6) is selectively heated and/or cooled. can.According to the invention, the temperature control device (7) is designed as a channel (9) through which a heating or cooling medium can flow, which has a curvature in its profile cross-section and is thereby adapted to the end contour of the web-shaped projection (4).