Spindle Metering Pump Layout for Direct Applicator Mounting

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Solution Overview

Problem

Existing spindle metering pumps for highly viscous materials suffer from long reaction times and hose ventilation issues due to the physical separation between the applicator and the spindle metering pump, leading to application errors and limited dynamic volume flow changes.

Innovation Solution

Reversing the spatial arrangement of the material inlet and outlet in the spindle metering pump, allowing direct flange mounting of the applicator, eliminating the need for a hose, and incorporating a material pressure regulator to control pump inlet pressure and minimize slip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the applicator is physically separated from the spindle metering pump and connected via a hose, then the pump can be mounted away from the applicator, but this causes long reaction times and hose ventilation issues

Engineering Contradiction:

Improvemounting flexibilityVSAvoidreaction time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent merges the applicator directly with the spindle metering pump by positioning the material outlet at the free end of the pump, allowing the applicator to be mounted directly at the pump outlet without requiring a separate hose connection. This integration eliminates the hose and reduces the reaction time while maintaining mounting flexibility.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If the applicator is physically separated from the spindle metering pump and connected via a hose, then the pump can be mounted away from the applicator, but this causes hose ventilation and application errors

Engineering Contradiction:

Improvemounting flexibilityVSAvoidapplication accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent converts the previously harmful hose ventilation effect into a benefit by eliminating the hose entirely through direct integration. The material outlet is positioned at the free end of the pump, allowing direct connection of the applicator without any intermediate hose, thus converting the harm of hose ventilation into the benefit of hoseless operation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Ease of manufacture

If the material outlet is at the drive end of the pump, then the pump structure is conventional, but the applicator cannot be directly mounted

Engineering Contradiction:

Improvepump structureVSAvoidconnection structure

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent inverts the conventional pump structure by positioning the material outlet at the free end of the pump instead of at the drive end. This inversion allows the applicator to be directly mounted at the material outlet without requiring a hose, simplifying the connection structure while maintaining conventional pump manufacturing.

Inventive Principle:

Principle #13The other way round (Inversion)

4Adaptability or versatility

If a hose is used to connect the pump and applicator, then the system is flexible, but hose breathing causes time delay in volume flow changes

Engineering Contradiction:

Improvesystem flexibilityVSAvoidvolume flow response speed

Core Design Contradiction:

Adaptability or versatilityVSSpeed

Solution Approach 1:

The patent extracts and removes the hose from the system by positioning the material outlet at the free end of the pump, allowing direct mounting of the applicator. This extraction eliminates the hose breathing effect that caused time delays in volume flow changes, significantly improving the response speed while maintaining system flexibility through direct connection.

Inventive Principle:

Principle #2Taking out (Extraction)

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

Enables highly dynamic metering with reduced reaction times, eliminates hose ventilation, and improves dosing accuracy by minimizing pump slip and pressure pulsations, facilitating easier assembly and disassembly on application robots.

Implementation Method 1

The spindle metering pump 1 has a flanged heating module 7 to heat the application material

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

the material inlet 3 of the spindle metering pump 1 is connected via a pipe 4 to a material pressure regulator 6, which regulates the pump inlet pressure at the material inlet 3 of the spindle metering pump 1 to a predetermined setpoint

Methodology Applied

Scientific EffectPressure regulation: Pressure Gradient

Data Source

PatentEP4558731B1Application system with a spindle metering pump and associated operating method

Publication Date: 2026.04.01 DUERR SYST AG

Figure 1A~1B
Figure 2A~2B
Figure 3

AI summary

The invention relates to a spindle metering pump (1) with a material inlet (3) for receiving the application agent to be applied, a material outlet (4) for discharging the application agent to be applied and a rotary drive (2) for rotating the spindle metering pump (1). The invention provides for the material outlet (4) on the spindle metering pump (1) to be arranged further away from the rotary drive (2) than the material inlet (3), so that an applicator can be flanged directly to the spindle metering pump (1).