Container Clamping Force Control for Thin-Walled Bottle Stability
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Solution Overview
Problem
Existing methods for applying equipment characteristics to thin-walled containers, such as blow-molded plastic or PET bottles, often result in container damage due to sudden and high clamping forces before the containers are sufficiently stabilized by internal pressure.
Innovation Solution
A method and apparatus for applying equipment characteristics to empty thin-walled containers using a container treatment machine with a controlled clamping force that increases in phases, allowing pre-tensioning by gas pressure, where the clamping force is managed by a control valve and actuation element to stabilize the container before applying labels or prints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high pressure gas is used to stabilize thin-walled containers before applying equipment characteristics, then container stability is improved, but high clamping force is required which can damage unstable containers
Solution Approach 1:
The patent applies preliminary action by introducing gas pressure into the container before applying full clamping force. The control valve opens to allow gas to enter and stabilize the container walls, creating internal support that enables subsequent application of higher clamping forces without damage. This sequence of stabilizing first, then clamping, resolves the contradiction between needing stability and avoiding damage from high force.
2Stability of the object's composition
If container clamping force is increased suddenly to stabilize containers, then stabilization is achieved faster, but container damage occurs before gas pressure stabilizes the container
Solution Approach 1:
The control valve mechanism performs preliminary action by opening before the centering element fully engages with the container. This allows gas pressure to build up and stabilize the container walls in advance, preventing damage when the full clamping force is subsequently applied. The timing sequence ensures stabilization occurs before high force is applied.
Solution Approach 2:
The gas pressure acts as a cushioning medium that prepares the container for upcoming clamping forces. By introducing this protective pressure advance, the system creates a buffer that prevents sudden force from damaging the container, allowing faster stabilization while maintaining integrity.
3Stability of the object's composition
If control valve opens early to allow gas pressure entry, then container stabilization is improved, but clamping force must be carefully controlled to prevent damage
Solution Approach 1:
The system employs dynamic control where the control valve timing is coordinated with the centering element movement. The valve opens at a specific moment during the clamping sequence, allowing gas pressure to enter dynamically rather than statically. This dynamic timing approach enables pre-tensioning without requiring overly complex control mechanisms.
Solution Approach 2:
The control valve remains open during the gas pressure stabilization phase, maintaining continuous gas flow to ensure adequate pre-tensioning. This continuous action ensures the container is properly stabilized throughout the critical period before full clamping is applied, achieving reliability without excessive complexity.
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
This approach ensures gentle and reliable treatment of thin-walled containers by gradually increasing the clamping force, preventing damage and ensuring stability before applying labels or prints, thereby improving the operating reliability of the process.
Implementation Method 1
Gas pressure stabilizes the containers by pre-tensioning them. The high pressure gas supports the walls so that the bottles are neither deformed nor destroyed by the container clamping force
Implementation Method 2
The container treatment machine has treatment positions on a circumferential transport element that rotates about a vertical machine axis. The containers on the treatment positions are clamped between a container support and a centering cone of a centering element by a container clamping force that acts between the container and the centering cone
Data Source
AI summary
A container treatment machine has treatment positions provided on a circumferential transport element rotating about a vertical machine axis. Each has a container carrier, a centering element, an aggregate, a control valve, and an actuation element. The treatment position clamps empty containers with a clamping force between the carrier and the cone. The actuation element generates the container clamping force. The control valve controls flow through the channel. Containers lying in a sealed position against the centering cone are loaded with pressure medium that travels through the channel to generate a container-stabilizing internal pressure. The control valve, which is in the centering element, causes container pre-tensioning by being opened by a container clamping force that acts between the centering cone and the container to pretension the container.