Elastic Plastic Guide Body Sealing Lips Injection Device
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Solution Overview
Problem
Existing needle registers for injection devices used in food products, such as curing devices, face challenges in easy cleaning and maintenance due to complex sealing arrangements and the need for thorough cleaning to prevent contamination.
Innovation Solution
Guide bodies made of elastic plastic materials with integrally formed sealing lips on both inner and outer circumferences, eliminating the need for circumferential grooves and allowing for easier assembly and cleaning, while providing a high sealing effect and stable support for needles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal guide bodies with circumferential grooves and sealing rings are used, then a sealing effect is achieved, but the sealing arrangement becomes complex and difficult to clean
Solution Approach 1:
The patent combines the guide body and sealing function into a single integrated component. The elastic plastic guide body incorporates sealing lips directly on its inner and outer circumferences, eliminating the need for separate sealing rings and grooves. This merging of functions simplifies the sealing arrangement while maintaining effective sealing between the needle and the distribution chamber walls.
Solution Approach 2:
The patent employs an elastic plastic guide body that functions as a flexible sealing element. The material's elasticity allows the guide body to deform and conform to the needle and distribution chamber interfaces, creating effective seals without requiring rigid grooves or separate sealing components. This flexible approach simplifies the overall structure while ensuring reliable sealing.
2Reliability
If circumferential grooves are used in guide bodies for sealing, then sealing is achieved, but cleaning becomes difficult due to shear edges formed by groove edges
Solution Approach 1:
The elastic plastic guide body acts as a flexible sealing element that eliminates the need for circumferential grooves. The sealing lips are formed directly on the smooth outer surface of the guide body, creating no shear edges or crevices where liquid could accumulate. This smooth, grooveless design allows for thorough cleaning and prevents contamination in food processing applications.
Solution Approach 2:
The patent converts the potential harm of complex groove structures into benefit by using the elasticity of the plastic material to achieve sealing without grooves. The elastic deformation of the guide body provides the necessary sealing force while maintaining a smooth surface that is easy to clean, thus converting the complexity issue into a simplification advantage.
3Reliability
If metal guide bodies with grooves are used, then sealing is achieved, but durability is reduced due to shear edges causing wear
Solution Approach 1:
The elastic plastic guide body provides enhanced durability by eliminating rigid grooves and shear edges. The flexible material deforms elastically to maintain sealing contact without creating stress concentration points that would lead to wear or fatigue failure. This results in a longer service life for the guide body while maintaining effective sealing throughout its operational duration.
Solution Approach 2:
The patent changes the material parameter from rigid metal to elastic plastic, fundamentally altering the sealing mechanism. Instead of relying on rigid groove geometry, the sealing is achieved through elastic deformation of the plastic material. This parameter change eliminates the wear issues associated with shear edges while maintaining reliable sealing over an extended period.
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
The solution enhances durability and facilitates thorough cleaning, ensuring a high sealing effect and stable support for needles, while simplifying the sealing arrangement and reducing the risk of contamination, particularly in food-processing applications.
Implementation Method 1
the guide bodies are made of an elastic plastic material and each have an integrally formed sealing lip on the inner and outer circumference
Implementation Method 2
The sealing lip on the outer circumference of the guide body can be conical in such a way that, when the guide body is subjected to axial load, it rests against a shoulder of the bore accommodating the guide body, thereby expanding radially
Data Source
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AI summary
Needle register for injection devices for injecting liquid into food products, comprising a distribution chamber (16) for distributing the liquid onto several parallel, hollow needles (10), each extending through a bore (28) formed in a wall (18, 20) of the distribution chamber (16), and a sealing arrangement comprising guide bodies (22) which are each inserted into one of the bores (28) and surround the needle (10) and which are sealed on one side at the circumference of the needle and on the other side at the inner surface of the bore (28), characterized in that the guide bodies (22) are made of an elastic plastic material and each have a sealing lip (32, 42) integrally molded on the inner and outer circumference.