ISBM Machine Startup and
Commissioning: Korean Guide

1. Why Startup Protocol Determines Korean ISBM Production Quality

Korean ISBM product quality is most vulnerable during startup — the period between machine power-on and steady-state production when every process variable is in transition: temperatures are climbing toward setpoint, thermal gradients are equalising, hydraulic or servo systems are building to operating pressure, and resin in the barrel is progressing from cold and solid to molten and processable. A Korean ISBM machine that has been running stably for 6 hours at nominal setpoints produces consistent bottles. The same machine at minute 18 of startup — before barrel zone temperatures have fully equalised, before the hot runner manifold has stabilised, and before the conditioning station thermal mass has reached steady-state — cannot produce specification-compliant bottles regardless of what the controller’s setpoint display shows.

The commercial consequence of inadequate startup protocol: Korean ISBM operations without structured startup produce 80–200 bottles of non-conforming product per cold-start before the process stabilises. At 2 cold-starts per day (shift changes) × 300 production days/year × 150 sub-specification bottles per startup × Korean K-Beauty PETG scrap cost of KRW 80/bottle: KRW 7.2M/year in startup scrap — before counting the Korean brand quality risk from any of those 150 bottles being released to production count and subsequently failing the brand’s incoming inspection. The full Korean ISBM preventive maintenance framework that startup protocol integrates with is in the Korean ISBM 5-tier maintenance checklist.

2. Pre-Startup Mechanical and Utility Checklist: 10 Minutes That Prevent 4-Hour Stoppages

The pre-startup checklist is performed before the machine is powered on — it verifies that all mechanical, electrical, and utility conditions are safe and correct before any thermal or mechanical startup begins. A defect identified on this checklist costs 10 minutes to correct; the same defect discovered during production costs 2–8 hours of unplanned downtime.

3. Barrel Preheating Sequence: Preventing Thermal Shock and Resin Degradation

Korean ISBM barrel preheating is the most technically critical startup step — and the step most frequently performed incorrectly. The barrel consists of multiple independently heated zones (typically 4–6 zones from hopper throat to nozzle), each with a different thermal mass and different thermal equilibration rate. Applying full setpoint temperature to all zones simultaneously from cold creates steep axial thermal gradients and risks both barrel liner mechanical stress and resin thermal damage if the screw rotates before temperature equilibration is complete.

Korean ISBM barrel preheating 3-stage sequence for PET (adapt proportionally for PETG, Tritan):

1. 1

   Stage 1: 50% setpoint (0–8 minutes)

   Set all barrel zones to 50% of final production setpoint (for PET: target 265°C final → Stage 1: 132°C). Allow 8 minutes for all zones to reach 50% setpoint. This stage brings the cold barrel steel to a uniform intermediate temperature without thermal shock. Do not activate screw rotation during Stage 1.

2. 2

   Stage 2: 80% setpoint (8–15 minutes)

   Advance all zones to 80% of final setpoint (PET: 212°C). Allow 7 minutes for equalisation. At the transition to Stage 2, the hot runner heating can be activated at 60% of hot runner setpoint — the hot runner thermal mass is smaller and responds faster than the barrel.

3. 3

   Stage 3: Full production setpoint (15–20 minutes)

   Advance all barrel zones to full production setpoint. Allow 5 minutes for final zone equilibration. The hot runner should now be at full production setpoint and stable (controller showing < ±1°C zone variation for 2 consecutive minutes). At this point, the barrel has been uniformly at production temperature for a minimum of 2 minutes — the EV servo controller can now activate the screw for purge.

4. Hot Runner Commissioning: Zone Verification Before First Shot

The hot runner is the most thermally sensitive component of the Korean ISBM mould system — and the component whose startup condition most directly determines first-shot preform quality. A hot runner zone that has not reached full thermal equilibrium produces short-shots (incomplete cavity fill) or cold slugs (solidified polymer fragments) in the first production shots that block the gate and cause cavity-specific quality defects that persist for 15–30 shots after the cold slug is cleared.

Hot runner commissioning verification — 4 checks before first shot:

• Zone temperature stability: All hot runner zones within ±1°C of setpoint and stable (not oscillating) for a minimum of 3 consecutive minutes. A zone that is oscillating ±3°C around setpoint has not reached thermal equilibrium — its nozzle tip is cycling between slight under-temperature and slight over-temperature, producing inconsistent gate zone preform weights.
• Duty cycle check: EV servo ISBM platforms with hot runner duty cycle display should show all zones at 30–60% duty cycle at steady-state. A zone at 95–100% duty cycle has not yet reached setpoint (still heating up). A zone at 0–5% duty cycle may have a shorted thermocouple reading above setpoint — verify with the zone temperature versus ambient plausibility.
• Manual purge test: Before activating automatic machine cycles, perform a manual single-injection purge shot. Observe the purge output: all cavities should eject similar-volume polymer strands simultaneously. Any cavity that ejects significantly less polymer (or none) than the others has a gate that has not fully equilibrated — extend the hot runner warm-up time by 5 minutes and re-test before proceeding.
• Colour carry-over check: If the current production run uses a different colour masterbatch from the previous run, include a colour check in the hot runner commissioning — run 5 purge shots and confirm the colour is correct at all cavities before producing counted product. Hot runner manifold dead zones (areas of low flow) can retain previous-colour polymer for 8–15 shots longer than the main flow path.

5. Conditioning Station Warm-Up and Thermal Equilibration Verification

The conditioning station requires separate warm-up management from the barrel and hot runner — its large thermal mass (the insulated oven surrounding multiple heater zones) responds more slowly to setpoint changes than the barrel zones and must be allowed to reach genuine thermal steady-state before production begins. A conditioning station controller displaying the setpoint temperature does not guarantee that the conditioning oven has reached thermal steady-state — it only guarantees that the air temperature at the thermocouple location has reached setpoint.

Conditioning station warm-up sequence:

1. Activate conditioning station heating at machine power-on (simultaneously with barrel Stage 1 preheating). The conditioning station can safely ramp directly to 60% of production setpoint from cold — its lower operating temperature range (85–165°C versus barrel’s 265–285°C) does not require staged ramp-up.
2. Advance to full conditioning setpoint when barrel reaches Stage 2 (approximately 8 minutes after start). The 12 minutes between conditioning full-setpoint activation and the first production shot (barrel Stage 2 + Stage 3 + purge) provides adequate conditioning station equilibration time.
3. Verify conditioning equilibration before first production shot: observe the conditioning controller’s zone temperature display for 2 consecutive minutes — all zones must be within ±1°C of setpoint without oscillation. If any zone is still approaching setpoint, delay first production shot by 3 minutes and re-verify.
4. Production-quality verification (not just temperature): run the first 3 production shots and measure bottle weight and haze. Weight within ±0.5g of production baseline confirms adequate conditioning. For Korean K-Beauty PETG, haze within ±0.3% of baseline confirms conditioning equilibration — temperature display alone does not.

6. First-Shot Qualification Protocol: From Purge to Production Release

The first-shot qualification protocol bridges the gap between machine warm-up completion and production count release. It consists of a defined number of purge shots (to clear any degraded resin from the startup transition) followed by qualification shots (measured and evaluated against the production baseline) that confirm the machine has reached steady-state before the first production-count bottle is made.

Korean pharmaceutical and K-Beauty brand GMP suppliers must retain startup qualification records for 2 years (Korean KFDA primary packaging requirement) — the qualification record is the evidence that production-count bottles were not released until after the machine had passed the documented first-shot qualification criteria.

7. Production Recipe Documentation and Version Control

Korean ISBM production recipes — the complete set of machine parameter setpoints that define a specific product format’s production conditions — are the most important documents in Korean ISBM quality management. A recipe that is incorrect, outdated, or loaded onto the wrong mould causes immediate production quality failure. Korean ISBM recipe management must address three risks: incorrect recipe loaded, correct recipe at wrong version, and approved recipe parameters changed without authorisation.

Korean ISBM recipe document structure — minimum required parameters per product format:

• Recipe identity fields: Product name, bottle specification code, mould serial number, recipe version number (e.g. v2.3), approval date, and approving technician name. These fields ensure the operator can verify recipe-to-mould match before production begins.
• Injection parameters: Barrel zone setpoints (all zones), injection speed profile, hold pressure, hold time, screw back pressure, screw rotation speed, shot size.
• Conditioning parameters: All conditioning zone setpoints, conditioning dwell time, seasonal adjustment flags (summer/winter variants if applicable).
• Blow parameters: Pre-blow pressure and trigger position, high-blow pressure and timing, blow dwell time, exhaust timing, stretch rod speed and end-point position.
• Quality acceptance criteria: Bottle weight target and ±tolerance, neck OD target and tolerance, haze target (for PETG/crystal PET), top-load target (if specified by Korean brand), and first-shot qualification acceptance limits.

Korean ISBM recipe version control: any change to a production recipe — even a single parameter — requires a new version number, the date of change, the reason for change, and the name of the authorised process technician who approved the change. This version control creates an audit trail that Korean pharmaceutical brand GMP auditors review during annual supplier qualification — and that Korean ISBM process engineers use to identify which parameter change caused a quality drift event when reviewing historical production records.

8. New Machine Commissioning Handover and Operator Certification

New Korean ISBM machine commissioning — when a freshly delivered machine is being set up for the first time at a Korean production facility — requires a structured handover protocol between the Korean Ever-Power commissioning engineer and the Korean production team. This handover defines the knowledge transfer that equips Korean operators to run the machine independently, troubleshoot common issues, and maintain production quality without requiring engineering support for routine startup and quality management.

Korean Ever-Power new machine commissioning handover structure:

1. Machine installation verification (Day 1): Mechanical installation inspection, utility connection verification, safety system testing, EV servo axis calibration verification, and baseline measurement (all servo positions confirmed against machine specification sheet).
2. First production run with commissioning engineer present (Day 1–2): Running the agreed initial product format through the full cold-start startup protocol, first-shot qualification, and minimum 4 continuous hours of production at specified cycle time. Bottle measurements (weight, neck OD, haze, top-load) documented as the qualification baseline for all future production.
3. Operator training — startup and operation (Day 2–3): Korean-language training on the startup checklist, barrel preheating sequence, hot runner commissioning, conditioning verification, and first-shot qualification protocol. Korean operators perform the full startup sequence independently under engineer observation before certification.
4. Alarm code reference card creation (Day 3): Korean Ever-Power engineer documents all alarm codes relevant to the installed machine configuration in Korean language, with the recommended operator response for each alarm category. This card is laminated and mounted at the machine control station — the essential quick-reference for operators encountering production stops.
5. Remote diagnostics activation and test (Day 3–4): Ethernet remote access configuration, connection test with Korean Ever-Power Korean service desk, and demonstration of remote parameter review and alarm history access. The complete Korean ISBM platform capabilities across the Korean Ever-Power 4-Station ISBM Machine Range include remote diagnostics as standard on all EV servo platforms.
6. Operator certification assessment (Day 4): Each Korean ISBM operator independently performs: full startup protocol from cold machine (timed; target ≤ 50 minutes), first-shot qualification (with measurement), one simulated production stop response (alarm presented, operator identifies and responds correctly), and shift handover record completion. Operators who complete all four tasks within specification are certified for independent operation and issued a machine-specific operator certification card.

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