Infusion Piercing Part Parallel Vent Channel Design
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Solution Overview
Problem
The existing production methods for puncturing parts in medical infusion systems require complex injection molding tools with slides to achieve the 90° deflection of ventilation ducts, making the process costly and inefficient.
Innovation Solution
A puncturing part design where the second ventilation channel section is aligned parallel to the first section, allowing for a single demolding direction in the injection mold, and a separately manufactured closure part creates a 180° deflection, simplifying the production process and eliminating the need for slides in the injection molding tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second ventilation channel section is deflected by 90° relative to the first channel section, then the ventilation system achieves proper airflow direction, but the injection molding tool requires complex slides and multiple demolding directions
Solution Approach 1:
The housing production is segmented into two separate steps: first producing the housing with parallel channel sections, then adding a separately manufactured closure part that creates the 90° deflection. This segmentation allows the injection mold to use simple parallel geometry while achieving the required functional deflection through assembly.
Solution Approach 2:
The closure part is pre-manufactured separately and then assembled to the housing to create the final 90° deflection geometry. This preliminary preparation of the closure part enables the main housing to be produced with a simple single-direction demold without requiring complex sliding mechanisms during injection molding.
2Shape
If the injection molding tool uses slides to create the 90° deflected channel section, then the housing geometry is achieved, but the production cost and process complexity increase
Solution Approach 1:
The housing is divided into two manufacturing components: the main housing body produced by injection molding with parallel channels, and a separate closure part that provides the 90° deflection. This segmentation eliminates the need for expensive slides in the injection mold while achieving the required geometric deflection through the assembled closure part.
Solution Approach 2:
Instead of creating the 90° deflection directly in the injection mold using complex slides, the invention inverts the approach by producing the housing with simple parallel channels and then adding the deflection geometry through a separately manufactured closure part that is assembled afterward.
3Stability of the object's composition
If the housing is produced in one piece with the deflected channel section, then the structural integrity is maintained, but the demolding process requires multiple directions and slides
Solution Approach 1:
The housing production is segmented into the main housing body and a separate closure part. The main housing is produced efficiently with a simple single-direction demold process, while the closure part is separately manufactured and assembled. This segmentation maintains the structural integrity of the final assembled housing while dramatically improving manufacturing efficiency by eliminating complex slides and multi-directional demolding requirements.
Data Source
Figure 1~2
Figure 3
AI summary
1. Piercing part for a medical infusion system, drip chamber with such a piercing part, and injection mold for manufacturing such a piercing part. 2.1 Such a piercing part with a housing having a piercing mandrel, a fluid channel, and a ventilation channel, the latter having a first channel section running at least largely parallel to the fluid channel and a second channel section deflected towards an outside of the housing, to which an air filter element and a fluid shut-off element are assigned, is known. 2.2 According to the invention, the second channel section is aligned parallel to the first channel section in the housing and is open towards an inside of the housing, and the open area of the channel section is closed by a separately manufactured closure element. 2.3 Use in a medical infusion system