Automatic Seal Cutting with Clamped Positioning and Clean Separation

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Solution Overview

Problem

Existing cutting devices for seals with housings, particularly automatic door seals, are inefficient and unreliable when adapting to non-standard door widths, leading to manual and time-consuming adjustments that can result in contamination and functional issues due to improper cutting methods.

Innovation Solution

A cutting device with clamping assemblies, sensor systems, and a controlled cutting mechanism that allows precise measurement and separation of seal components, ensuring accurate cutting and minimal contamination, suitable for use in manufacturing environments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If seals are shortened manually by technicians on-site, then the sealing function can be adapted to non-standard door widths, but the reliability and consistency of the cutting process deteriorates due to varying technician training and manual errors

Engineering Contradiction:

Improveadaptability to non-standard door widthsVSAvoidreliability of cutting process

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The cutting device enables self-service operation where the seal itself guides the cutting process. The seal's housing is clamped and positioned automatically, and the cutting depth is controlled by the seal's own geometry, eliminating the need for trained technicians to perform precise manual measurements and cuts.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Manual mechanical cutting by technicians is replaced with an automated cutting mechanism. The device uses mechanical clamping assemblies to secure the seal and a controlled cutting assembly to perform the shortening operation, replacing human skill with automated mechanical precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If seals are shortened at the manufacturer, then cutting precision can be maintained, but the loss of time increases due to additional manufacturing steps and delayed delivery

Engineering Contradiction:

Improveprecision of seal cuttingVSAvoidtime for seal shortening

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The cutting device is pre-installed at the manufacturer's facility, allowing seals to be cut to specific lengths before delivery. This preliminary action ensures precision is maintained while enabling just-in-time production, reducing inventory holding times and allowing faster response to custom order requirements.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The cutting device serves multiple functions: it can cut seals to various lengths, perform quality inspections, and prepare seals for different installation scenarios. This multi-functionality consolidates multiple manufacturing steps into one integrated system, reducing overall processing time while maintaining precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If seals are shortened in the door factory manually, then adaptability to specific door dimensions is improved, but productivity deteriorates due to disruption of automated manufacturing processes

Engineering Contradiction:

Improveadaptability to door dimensionsVSAvoidproductivity of door factory

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

Manual cutting operations in the door factory are replaced with an automated cutting device. This substitution maintains the ability to adapt seals to specific door dimensions while eliminating the need for manual intervention, keeping the manufacturing process automated and maintaining high productivity levels.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The cutting operation is segmented as a separate, modular function within the door factory workflow. The cutting device operates independently as a dedicated station, allowing seal shortening to be performed quickly without disrupting the main automated assembly line, thus preserving overall factory productivity.

Inventive Principle:

Principle #1Segmentation

4Manufacturing precision

If aluminum retaining profile is sawed first, then the retaining profile can be shortened accurately, but harmful factors increase as aluminum shavings contaminate the elastomeric sealing profile

Engineering Contradiction:

Improveprecision of retaining profile cuttingVSAvoidcontamination of sealing profile

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The cutting sequence is inverted: instead of cutting the aluminum retaining profile first and then the elastomeric sealing profile, the device cuts the elastomeric profile first while the aluminum profile remains uncut and secure. This reversal prevents aluminum shavings from falling onto and contaminating the elastomeric material, eliminating the harmful contamination effect while maintaining cutting precision.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP3750655B1Cutting device for automatic seals

Publication Date: 2026.01.28 ATHMER

Figure 1
Figure 1a
Figure 1b

AI summary

The invention relates to a cutting device (A), in particular for automatic seals (D), comprising: - a first clamping assembly (31) for clamping a housing (D1) of a seal (D) in the region of its first end, - a second clamping assembly (32) for clamping the housing (D1) of the seal (D) in the region of its second end, - with a saw (5), at least for shortening the housing (D1) of the seal (D1), - wherein the second clamping assembly (32) is linearly displaceable relative to the first clamping assembly (31) and to the saw (5).