Blow Molded Plastic Pipe End With Locked-In Support Ring
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Solution Overview
Problem
Plastic blow molded pipes face issues with maintaining a secure connection to support rings, especially under high humidity and temperature conditions, where the pipes expand and risk losing the support ring due to lack of defined axial position and preload, leading to potential leaks.
Innovation Solution
The blow molded pipe section is molded through a support ring with a defined alignment, forming undercuts and using chamfers for enhanced engagement, ensuring the support ring remains securely positioned and immovable during expansion and contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If support sleeves or support rings are inserted into the pipe end to prevent deformation during clamping, then the pipe end deformation is prevented and leaktightness is ensured, but the support sleeve may fall out of the pipe end when stored in high humidity and temperature environments due to pipe expansion
Solution Approach 1:
The support ring is inserted into the pipe end before the blow molding process, establishing its position in advance. The pipe end is then molded around the support ring, creating undercuts that permanently secure it. This preliminary placement ensures the support ring remains positioned even when the pipe expands due to moisture absorption during storage.
Solution Approach 2:
The support ring is nested within the pipe end structure during the blow molding process. The pipe wall is formed around the support ring, creating an integrated structure where the support ring is embedded in the pipe end. This nesting ensures the support ring cannot fall out during storage or handling.
2Stability of the object's composition
If preload, locking catches, or ribbing are added to the support sleeve to prevent it from falling out during pipe expansion, then the support sleeve position is maintained, but these elements have a negative effect during clamping when pressed into the pipe inner surface
Solution Approach 1:
The support ring features localized engagement elements (undercuts formed by the blow molding process) at specific positions rather than continuous ribbing or preload mechanisms. These undercuts are strategically positioned to secure the support ring axially while leaving the outer surface smooth and uniform, preventing damage to the hose during clamping operations.
3Ease of manufacture
If the support ring is inserted without defined axial position, then insertion is simple, but assembly errors occur and the support ring position is not reliably defined
Solution Approach 1:
The support ring is inserted into the pipe end before the blow molding process begins. The blow molding tool then forms the pipe end around the support ring, automatically defining its axial position through the molding process itself. This eliminates the need for precise pre-positioning while ensuring consistent positioning through the molding operation.
Solution Approach 2:
The blow molding process itself serves to position and secure the support ring. The parison is inflated around the support ring, and the cooling and ejection process automatically establishes the support ring's final position within the pipe end, eliminating the need for separate positioning mechanisms or operations.
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 solution provides a reliable, leak-proof connection by maintaining the support ring's position and preventing damage to hoses, even under varying environmental conditions, while ensuring secure seating and anchoring during the blow molding process.
Implementation Method 1
the diameter of the pipe section, which increases from the inside outward during the blowing of the parison
Data Source
AI summary
The invention relates to a plastics pipeline comprising at least one pipeline end (1) and at least one support ring (2). It was the underlying object of the invention to improve a plastics pipeline of the type described at the outset in such a way that the support sleeve or the support ring (2) remains firmly connected to the pipeline even in the event of the plastics pipeline being stored in the presence of high air humidity and temperature. This object is achieved by virtue of the fact that the blow molded pipe section (1) runs through the support ring (2) and, as viewed radially, is pressed from the inside outward against the support ring (2), wherein the pipe section (1) engages around the support ring (2), such that the support ring (2), with its outer surface, and the pipe section (1), with its outer surface, are substantially in alignment.