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文章詳情
瓶胚吹瓶機：Preform Blow Molding Machine
日期：2026-01-14 23:18
瀏覽次數(shù)：17
摘要：瓶胚吹瓶機：Preform Blow Molding Machine
瓶胚吹瓶機：Preform Blow Molding Machine
Preform Blow Molding Machine (ISBM/RSBM) Standard Operating Procedures (SOP)
I. Pre-Startup Preparation (Critical for Safety & Product Quality)
1. Equipment Inspection
- Mechanical System: Check the mold clamping mechanism, guide rails, and stretch rod for debris, wear, or looseness, ensuring the stretch rod operates smoothly (use food-grade lubricant for food packaging applications); clean residual plastic and dust from the mold cavity, and inspect the mold for cracks and surface damage; verify that the feeding conveyor, orientation mechanism, and demolding system are properly aligned, and test manually to ensure no jamming.
- Electrical System: Confirm stable power supply and good grounding, normal display of the control panel (HMI), and intact buttons and indicators; check wiring harnesses, connectors, and sensors (temperature/pressure/position) for no damage or looseness, and ensure the emergency stop button responds sensitively.
- Pneumatic & Hydraulic Systems: Check the air compressor pressure (0.6-0.8MPa), and use soapy water to detect no air leakage in air pipes, valves, and cylinders; for hydraulic clamping systems, verify normal oil level and temperature, and no leakage in hydraulic pipelines.
- Cooling System: Ensure sufficient liquid level in the cooling water tank and normal operation of the water pump, with no blockage in cooling pipelines; set the cooling water temperature (15-25℃ for PET containers) and verify that the flow rate meets requirements.
2. Material Preparation
- PET Preforms: Moisture content ≤0.02% (dried at 140-160℃ for 4-6 hours to prevent hydrolysis); free of scratches, deformation, uneven wall thickness, and other defects, with intact neck threads; the hopper loading capacity shall not exceed 80% to avoid jamming in the feeding system.
- Auxiliary Materials: Prepare high-pressure air filtered to remove oil and water, and confirm the normal operation of the air dryer.
3. Mold Installation & Calibration
Evenly fasten the mold bolts according to the manufacturer's torque standards to ensure precise positioning of the mold and the clamping mechanism; connect the mold's cooling water pipes and confirm no leakage; adjust the clamping force (50-500kN, adjusted according to mold size) to ensure tight mold closure and uniform gap, preventing flash on finished products.
II. Startup & Parameter Setting (Step-by-Step Calibration)
1. Power-On & System Initialization
Turn on the main power supply, control panel, and auxiliary systems (air compressor, cooling water pump, heater) in sequence, and wait for system initialization (1-2 minutes). If the HMI displays fault codes (e.g., "low air pressure", "temperature sensor fault"), troubleshoot and resolve before proceeding.
2. Heating Tunnel Preheating
Set the heating temperature according to the preform material and thickness (70-90℃ for PET preforms, slightly lower temperature at the neck to prevent deformation), configure 3-5 heating zones, and enable PID constant temperature control. After preheating for 20-30 minutes, confirm that the actual temperature matches the set value.
3. Core Parameter Configuration (Critical for Finished Product Quality)
Set the following key items in the HMI according to the container design parameters, with reference ranges as follows:
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Parameter Category
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Specific Settings
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Reference Range for PET Containers
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Heating Parameters
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Temperature of Zones 1-5, Preform Residence Time
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70-90℃; 8-15 seconds (extended for thick preforms)
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|
Stretching Parameters
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Stretch Rod Speed, Stretch Stroke
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50-150mm/s; Finished Product Height - Preform Height
|
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Blow Molding Parameters
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Primary Blowing Pressure, Secondary Blowing Pressure, Blowing Time
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0.8-1.5MPa; 3-4MPa; 1.5-3 seconds
|
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Cooling & Cycle
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Mold Cooling Time, Total Cycle Time
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2-5 seconds (extended for large-capacity products); 3-10 seconds
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