Pultrusion Forming Device with Segmented Heating Zones
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Solution Overview
Problem
Current methods for manufacturing fiber-reinforced composite profiles are inefficient and do not consistently produce high-quality products due to limitations in temperature control and shaping processes.
Innovation Solution
A forming device with a pultrusion system that features adjustable tool parts with changing cross-sectional contours, a heating unit with temperature control, and a control unit to manage the heating and movement of the semifinished product, allowing for continuous transformation from an initial to a nominal profile cross-section, with optional vibration for frictional heating and multiple heating zones for precise temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pultrusion methods are used, then production can proceed with simple equipment, but manufacturing precision and product quality are insufficient
Solution Approach 1:
The forming device is divided into multiple independent heating zones (first heating zone, second heating zone, third heating zone) with distinct temperature control systems. Each zone can be adjusted independently to optimize the thermal processing at different stages of the pultrusion process, thereby improving manufacturing precision without requiring an overly complex integrated system.
Solution Approach 2:
The forming device incorporates adjustable tool parts with cross-sectional contours that can be modified to match different desired profile shapes. The gap between tool parts is continuously variable along the longitudinal direction, allowing dynamic adaptation to different product requirements. This dynamic adjustability enables high manufacturing precision while maintaining reasonable device complexity through modular design.
2Reliability
If temperature control is not optimized, then the process is simpler, but product quality and consistency deteriorate
Solution Approach 1:
The temperature control system is segmented into multiple independent heating zones, each with its own temperature control. This segmentation allows precise thermal management at different stages of the pultrusion process (heating, forming, cooling), ensuring consistent product quality while keeping each control unit relatively simple and manageable.
Solution Approach 2:
The patent implements temperature monitoring and control systems that regulate the thermal state of the semifinished product throughout the forming process. By monitoring temperature and adjusting heating accordingly, the system maintains reliable and consistent product quality without requiring excessively complex control mechanisms.
3Manufacturing precision
If the forming process is simplified, then device complexity is reduced, but manufacturing precision and defect reduction are compromised
Solution Approach 1:
The forming device features tool parts with cross-sectional contours that continuously change along the longitudinal direction, enabling the transformation of the semifinished product from an initial profile to a desired nominal profile. This dynamic contour design achieves high manufacturing precision while maintaining a relatively streamlined device structure through continuous rather than discrete adjustments.
Solution Approach 2:
Different sections of the forming device have locally optimized characteristics - the first heating zone prepares the material, the second heating zone performs main forming, and the third heating zone completes the process. Each local section is designed with specific properties suited to its function, achieving overall high precision without requiring the entire device to be maximally complex.
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 enables cost-efficient and high-quality production of fiber-reinforced profiles by ensuring continuous temperature control and precise shaping, reducing defects and improving the efficiency of the pultrusion process.
Implementation Method 1
a heating unit (51) that is arranged downstream of said intake region referred to said feed direction in order to heat the semifinished product (2) that is situated in said intake region (E)
Implementation Method 2
vibrating a supporting part in the intake region of the forming device in such a way that the semifinished product is transformed into a formable state due to the frictional heat generated between the supporting part and the semifinished product
Data Source
AI summary
Methods and apparatus for manufacturing a profiled semifinished fiber-reinforced composite (FRC) product from a semifinished product of dry fiber or prepreg material that is moved through a forming device in its longitudinal direction (L), where the semifinished product is moved between the facing forming contours of tool parts in the longitudinal direction of a forming device on a carrier foil and the forming contours of the cross sections of the tool parts continuously change from a cross-sectional contour in the entry region to a forming contour in the outlet region, where a supporting part in the intake region of the forming device is set in vibration in such a way that the semifinished product is transformed into a ductile state due to the frictional heat generated between the supporting part and the semifinished product, and where the speed of the movement of the semifinished product is controlled in dependence on the temperature of the semifinished product.