Container Internal Spraying With Servo-Driven Hollow Shaft Motion

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Solution Overview

Problem

Existing container cleaning machines lack flexibility in adapting to the geometries of different container types and durations of internal spraying.

Innovation Solution

A container cleaning machine with a spraying device comprising a hollow shaft and servomotors that allows independent movement and rotation of spray nozzles relative to the container basket, enabling flexible adaptation to container geometries and extended spraying duration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the hollow shaft is fixed relative to the container basket, then the device structure is simple, but the spraying cannot be adapted to different container geometries and durations

Engineering Contradiction:

Improveadaptability to container geometriesVSAvoiddevice structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The hollow shaft is made movable relative to the container basket through a servomotor-driven linear module, allowing dynamic adjustment of the shaft's position and the spray nozzles' orientation to adapt to different container geometries and spraying durations, resolving the contradiction between adaptability and structural simplicity

Inventive Principle:

Principle #15Dynamics

2Duration of action of moving object

If the hollow shaft is moved independently of the container basket, then the spraying duration can be increased, but the device complexity increases

Engineering Contradiction:

Improvespraying durationVSAvoiddevice structure

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

The servomotor-driven linear module enables independent movement of the hollow shaft relative to the container basket, allowing the spray nozzles to follow the containers throughout the spraying process and extend the effective spraying duration without excessively complicating the device structure

Inventive Principle:

Principle #15Dynamics

3Area of stationary object

If the hollow shaft is rotated about its longitudinal axis, then the spray coverage area is increased, but the device complexity increases

Engineering Contradiction:

Improvespray coverage areaVSAvoiddevice structure

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The servomotor enables rotation of the hollow shaft about its longitudinal axis, allowing the row of spray nozzles to cover a larger solid angle and apply spray medium more comprehensively across the container interior, resolving the contradiction between coverage area and structural complexity

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP4194112B1Injection device and method for internal injection of containers

Publication Date: 2025.08.13 KRONES AG

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AI summary

Spraying device (1) and method for internally spraying containers (2) arranged upside down in container cells (3) of a container basket (4) of a container cleaning machine moving in a direction of travel (5), with a spray medium (14). The spraying device comprises a hollow shaft (6) with at least one series of multiple spray nozzles (7) along the hollow shaft; a supply device (8) for supplying the hollow shaft with the spray medium; and at least one servo motor for moving the hollow shaft in the container cleaning machine relative to and independently of the container basket. The method comprises: supplying the hollow shaft with the spray medium by means of the supply device and moving the hollow shaft in the container cleaning machine relative to and independently of the container basket by means of the at least one servo motor.