Vulcanized Elastomer Seal for Metering Roller
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing metering roller devices often fail to maintain dosing masses within a predetermined tolerance range, especially when handling poorly flowing powders, due to inaccuracies in the intake vacuum and the limited durability of sealing elements.
Innovation Solution
A metering roller with a vulcanized elastomer seal on the filter strip provides a tighter seal and consistent negative pressure, ensuring repeatable dosing accuracy and eliminating the need for adhesives, which simplifies assembly and maintains sealing effectiveness over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If self-adhesive foam pads are used as sealing elements, then assembly is simplified, but durability is limited and elasticity is lost over time
Solution Approach 1:
The patent replaces the mechanical adhesive bonding system with a vulcanization chemical process. The elastomer sealing element is vulcanized directly to the filter strip, creating a permanent chemical bond that eliminates the need for adhesive layers and provides long-term durability while maintaining ease of assembly through a straightforward vulcanization process.
Solution Approach 2:
The patent changes the material state and bonding mechanism by using vulcanized elastomer instead of adhesive foam pads. The vulcanization process transforms the elastomer into a cross-linked polymer structure with permanent bonding properties, fundamentally changing the parameter of bond durability from temporary adhesive to permanent chemical connection.
2Reliability
If silicone rings are used as sealing elements, then sealing effectiveness is improved, but assembly complexity increases and positioning aids are required
Solution Approach 1:
The patent extracts and eliminates the need for separate positioning aids and complex assembly fixtures by integrating the sealing element directly into the filter strip structure. The vulcanized elastomer is applied directly to the filter strip surface, removing the requirement for separate positioning mechanisms and simplifying the overall assembly process while maintaining sealing effectiveness.
Solution Approach 2:
The patent merges the sealing element with the filter strip into a single integrated component through vulcanization. This combining of the elastomer seal and filter strip eliminates the need for separate positioning aids and complex assembly procedures, reducing device complexity while preserving sealing performance.
3Productivity
If volumetric dosing is used, then dosing speed is improved, but mass accuracy deteriorates especially for poorly flowing powders
Solution Approach 1:
The patent implements feedback control through the vulcanized elastomer seal that maintains consistent negative pressure in the dosing chamber. The seal ensures repeatable filling degrees by providing stable pressure feedback, which compensates for variations in powder flow characteristics and maintains mass accuracy while preserving volumetric dosing speed.
Solution Approach 2:
The patent changes the pressure control parameter by using a vulcanized elastomer seal that maintains stable negative pressure. This parameter change from variable pressure (with foam pads) to constant pressure (with vulcanized seal) enables consistent mass dosing even with poorly flowing powders, improving manufacturing precision without sacrificing productivity.
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 ensures that dosing masses are consistently within the desired tolerance range, even with poorly flowing powders, and maintains process reliability by avoiding assembly errors and ensuring purity in pharmaceutical and food supplement applications.
Implementation Method 1
a seal (13) that is an elastomer vulcanized onto the filter strip (11)
Implementation Method 2
A pressure channel is arranged in the filter strip, via which a negative pressure can be applied to the metering opening through the filter element
Implementation Method 3
the metering openings being delimited on the inside by means of a filter element
Implementation Method 4
greater accuracy is now achieved by a seal that is an elastomer vulcanized onto the filter strip
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a metering roller for filling a target container (21) with a metered portion of a powdered product (1). The metering roller comprises a roller shell (9), a filter element (8), a filter strip (11), a seal (13), and a clamping core (10). The roller shell (9) is provided with at least one metering opening (7) that completely penetrates the roller shell (9) from its outer surface (22) to its inner surface (23), wherein the metering opening (7) is limited on the inside by the filter element (8). The filter element (8) is pressed against the inner surface (23) of the roller shell (9) by the clamping core (10) via the filter strip (11). The seal (13) is arranged between the filter element (8) and the filter strip (11), wherein the metering opening (7) can be subjected to a vacuum through the filter element (8) via at least one pressure channel (14) in the filter strip (11).The seal (13) seals the connection between the pressure channel (14) and the metering opening (7). The seal (13) is an elastomer vulcanized onto the filter strip (11).