05 Safety
05.1 Scope
This safety section applies to all MPE i-Series tray sealing machines, including but not limited to:
Unless otherwise stated, the procedures and safety rules described here apply to all variants within the i-Series range.
Where machine-specific differences exist, these will be described in the relevant machine sections of this manual.
All personnel interacting with the machine must read and understand this section before operating, cleaning, or maintaining the equipment.
05.2 Intended use
The i-Series tray sealer is designed for:
Heat-sealing trays with lidding film
Packaging food products
Industrial production environments
The machine must only be used with:
Approved trays
Approved lidding films
Correct tooling for the tray format
Use of the machine outside of these conditions may lead to equipment damage or unsafe operation.
05.3 Personnel responsibilities
Only trained personnel are permitted to operate or service the machine.
Personnel are classified as follows:
Operators
Operators are responsible for:
Running the machine during production
Loading trays and film
Monitoring alarms and machine status
Performing basic cleaning tasks
Operators must not:
Modify machine parameters
Remove guards
Perform maintenance work
Maintenance Engineers
Authorised engineers may:
Maintain mechanical components
Replace machine parts
Adjust sensors
Access engineering parameters
Only authorised engineers should perform maintenance work.
Electrical Engineers
Electrical work must only be performed by qualified personnel authorised by the site engineering manager.
Electrical tasks include:
Electrical fault diagnosis
Servo drive configuration
PLC diagnostics
Safety circuit inspection
05.4 Mandatory safety rules
The following safety rules must be followed at all times.
Failure to comply may result in serious injury or machine damage.
⚠ WARNING Do not operate the machine unless properly trained.
Do not maintain the machine unless authorised by your engineering manager.
Do not bypass guard switches or safety devices.
Do not operate the machine with guards removed or open.
Do not reach into the machine while it is running.
Do not place tools or foreign objects inside the machine.
Do not modify sensors or parameters without OEM approval.
Do not operate the machine if safety devices appear damaged or faulty.
If any safety device is not functioning correctly, the machine must be isolated and reported immediately.
05.5 Emergency stop system
Emergency stop devices are located around the machine.
These include:
Emergency stop button on the HMI control pod
Additional emergency stops on machine frames
Guard interlock switches
Activating an emergency stop will immediately:
Stop all servo motion
Disable drive outputs
Remove power from motion systems
Prevent machine restart
The emergency stop system is part of the machine's safety-rated control system.
The machine will remain in a safe state until reset.
05.6 Guard interlock system
The machine is fitted with safety guards to prevent access to hazardous areas.
Opening a safety guard will:
Immediately stop machine motion
Disable drives
Generate a safety alarm
The machine cannot restart until:
Guards are closed
Safety reset is performed
⚠ WARNING Never operate the machine with guards removed.
05.7 Safety reset procedure
After an emergency stop or guard opening, the safety system must be reset.
Machine variants may differ slightly; however, the typical reset procedure is as follows.
Identify and remove the cause of the stop.
Ensure all guards are closed.
Reset all emergency stop buttons.
Press the blue System Reset button near the HMI.
Acknowledge alarms on the HMI.
Wait for the machine axes to complete homing.
Once the safety system is reset, normal operation can resume.
05.8 Lock out / tag out (LOTO)
Before performing maintenance, cleaning, or tooling changes, the machine must be isolated.
Isolation procedures must follow the site's Lock Out / Tag Out (LOTO) procedure.
Minimum isolation steps:
Turn the main electrical isolator to OFF.
Apply a lock and identification tag.
Verify electrical isolation.
Isolate gas supply (if installed).
Isolate vacuum supply (if installed).
Vent any stored pressure.
No work may begin until isolation is verified.
05.9 Mechanical hazards
The machine contains moving mechanical components that may present hazards.
These include:
Transfer arms
Sealing tool movement
Conveyor belts
Film drive rollers
Servo-driven mechanisms
These components can create:
Crush hazards
Pinch points
Entrapment risks
⚠ WARNING Never place hands inside the machine while it is operational.
05.10 Tooling hazards
Tooling assemblies may present additional hazards.
Heavy Tooling
Some tooling sets are heavy and must be handled carefully.
Where necessary:
Use lifting aids
Use two-person lifts
Hot Surfaces
🔥 HOT SURFACE Sealing tools operate at elevated temperatures.
After production stops, tooling may remain hot for several minutes.
Always wear heat-resistant gloves when handling tooling.
Cutting Blades
✂ SHARP BLADE Tooling includes sharp cutting blades used to trim film.
When handling tooling:
Avoid contact with blade edges
Wear cut-resistant gloves
05.11 Cleaning hazards
Cleaning must only be performed when the machine is safely isolated.
Before cleaning:
Stop the machine
Isolate electrical supply
Allow tooling to cool
During cleaning:
Do not jet wash the machine
Use minimal water
Protect sensors and motors
Avoid electrical panels
Do not use abrasive cleaning products on:
Clear guarding
Touchscreen displays
Painted surfaces
05.12 Electrical hazards
⚡ ELECTRICAL HAZARD The machine operates using high-voltage electrical systems.
Electrical panels contain:
High voltage supplies
Servo drives
Control electronics
Electrical panels must only be opened by qualified electrical engineers.
Never open electrical cabinets while the machine is energised unless trained and authorised.
05.13 Restart verification
Before restarting the machine after maintenance or cleaning, the following checks must be completed.
Safety Checks
Guards installed and latched
Emergency stops reset
No loose tools inside the machine
Mechanical Checks
Tooling installed correctly
Fasteners secured
Conveyors correctly fitted
Operational Checks
Film correctly threaded
Sensors clear
No product debris inside the machine
A dry cycle should be run before returning to production.
05.14 Documentation and records
The following documentation must be maintained and accessible:
Site risk assessment
Lock Out / Tag Out procedures
Machine electrical schematics
Machine pneumatic diagrams
Machine maintenance records
Operators and engineers must ensure all work performed on the machine is recorded in accordance with site procedures.
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