Sealing Element Projection Positioning
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Solution Overview
Problem
The production of sealing elements, particularly composite ones with an extruded profile section and molded parts, faces challenges in precise placement and alignment during processing to meet specified dimensions, leading to inconsistencies in the final product.
Innovation Solution
Incorporating a transverse projection on the extruded profile section allows for precise positioning relative to punching and injection molding tools, using this projection to guide the section during processing and ensuring accurate assembly on a workpiece carrier, with optional use of sensors for precise distance measurement and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the extruded profile section is manually positioned during processing, then the processing can be completed, but the positioning precision is insufficient leading to dimensional inconsistencies
Solution Approach 1:
The extruded profile section is equipped with a projection that automatically engages with the punching tool and injection molding tool, enabling self-positioning without external intervention. This self-service mechanism ensures consistent positioning precision while simplifying the overall processing procedure.
Solution Approach 2:
The projection is pre-formed on the extruded profile section during extrusion, preparing the positioning feature in advance. This preliminary action eliminates the need for complex positioning operations during subsequent processing steps, thereby improving manufacturing precision without increasing device complexity.
2Manufacturing precision
If the extruded profile section is repositioned multiple times during processing, then all operations can be performed, but positioning accuracy deteriorates
Solution Approach 1:
The processing operations are segmented into distinct steps (punching, injection molding) that all reference the same projection feature. This segmentation allows each operation to be performed independently while maintaining consistent positioning, thereby preserving dimensional accuracy without compromising processing efficiency.
Solution Approach 2:
The projection serves as a permanent self-positioning feature that remains effective throughout all processing steps. This eliminates the need for repositioning operations, maintaining both high dimensional accuracy and processing efficiency simultaneously.
3Manufacturing precision
If no positioning feature is provided on the extruded profile section, then the processing setup is simpler, but the alignment accuracy with tools is insufficient
Solution Approach 1:
The projection on the extruded profile section provides automatic self-positioning and self-alignment with the punching and injection molding tools. This self-service feature achieves high alignment accuracy while maintaining setup simplicity, as the projection naturally guides the tools into correct positions without complex fixtures or adjustment mechanisms.
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 method ensures precise alignment and assembly of sealing elements, enhancing the consistency and accuracy of the final product by allowing for controlled positioning and material connection between the projection and the extruded profile section, resulting in improved manufacturing efficiency and product quality.
Implementation Method 1
A projection made of plastic is expediently molded onto the extruded profile section, the injection molding producing a sufficiently strong material connection between the projection and the extruded profile section.
Data Source
Figure 1(a)~2(b)
Figure 3
AI summary
The invention relates to a method for producing a sealing element for forming a seal on a vehicle body, in particular a vehicle door; in said method, a profiled strip section (6) is subjected to punching, and/or an additional element portion of the sealing element is molded onto a profiled strip section. According to the invention, the profiled strip section (6) is provided with a projection (7) that extends transversely to the longitudinal direction of the strip, and said projection (7) is used for positioning the profiled strip section (6) relative to a punching die (8, 9) or injection mold in the longitudinal direction of the strip.