Blow Mold Locking State Detection for Continuous Bottle Forming
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Solution Overview
Problem
Existing blow-molding machines experience machine downtime and reduced efficiency due to improperly locked blow molds, leading to unusable plastic preforms and increased manpower requirements.
Innovation Solution
A sensor device is employed to detect the locking state of blow molds, allowing the system to continue production without immediate emergency stops, and a control device manages the supply of plastic preforms to ensure proper locking is maintained, with ejection mechanisms for improperly locked stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an emergency stop is initiated when the blow mold is not properly locked, then machine damage is prevented, but machine availability and efficiency are reduced
Solution Approach 1:
The detection system is segmented into multiple sensor devices positioned at different locations to detect various aspects of the locking mechanism independently, allowing precise identification of locking issues without triggering unnecessary emergency stops
Solution Approach 2:
The sensor devices provide continuous feedback about the locking state to the control device, enabling real-time monitoring and differentiation between actual locking failures and temporary anomalies, allowing the system to respond appropriately without unnecessary production interruptions
2Reliability
If an emergency stop is initiated when the blow mold is not properly locked, then machine damage is prevented, but production process continuity is interrupted
Solution Approach 1:
The sensor devices detect locking state anomalies before they can cause machine damage, allowing the control device to take preliminary actions such as adjusting process parameters or isolating affected stations without interrupting overall production
Solution Approach 2:
When a locking issue is detected at a specific forming station, the system discards only the affected preform or container at that station while continuing production at all other stations, minimizing time loss and recovering maximum production capacity
3Productivity
If the blow mold is not properly locked, then the locking mechanism fails to hold the blow mold closed, but continuous production can be maintained with sensor detection
Solution Approach 1:
Multiple sensor devices provide continuous feedback about the locking state at different critical points, creating a redundant monitoring system that ensures reliable detection of actual locking failures while allowing temporary anomalies without production interruption
Solution Approach 2:
The sensor detection system is applied locally at specific critical positions where locking state is most critical, allowing the system to maintain high reliability at these key points while maintaining overall production continuity through selective monitoring
Data Source
AI summary
An apparatus for forming plastic preforms into plastic containers, including a rotatable carrier on which a plurality of forming stations for forming the plastic preforms into plastic containers are arranged. The forming stations each have application devices for applying a flowable medium to expand the plastic preforms. The forming stations each have blow mold carriers on which blow molds are arranged, within which the plastic preforms are formed into plastic containers. A first movement mechanism is provided for opening and/or closing the blow molds, and wherein a locking mechanism is provided for locking the blow molds together at least temporarily during the expansion process. The apparatus has at least one sensor device which detects a locking state of the locking mechanism of at least one forming station and which outputs at least one signal which is characteristic of said locking state.