IBM CYCLE TIME · ZQ MACHINE PARAMETERS · COOLING DWELL · PP HDPE PCTG · KOREA EVER-POWER
IBM Cycle Time Optimisation:
ZQ Machine Parameters for PP, HDPE and PCTG
IBM cycle time directly determines IBM container output per machine-hour and is the primary driver of IBM production cost per unit. Understanding the five primary ZQ IBM cycle time components — injection fill, injection dwell, blow inflation and dwell, station index, and strip — and how each is optimised for PP, HDPE and PCTG materials on Korea Ever-Power ZQ machines is essential for IBM production engineering and programme cost modelling.
PP • HDPE • PCTG Dwell Time
ZQ40 • ZQ60 • ZQ80 • ZQ110 Output
KOREA EVER-POWER · ANSAN-SI, GYEONGGI-DO · TEMMUZ 2026
IBM CYCLE TIME · ZQ MACHINE COMPONENT SUMMARY
TOTAL IBM CYCLE
4.0s – 25s
Total IBM cycle time range on Korea Ever-Power ZQ machines: 4.0 seconds (ZQ dry cycle minimum, all-electric ZQ60HE) to 25+ seconds (large HDPE industrial container at ZQ135 with thick wall and extended blow dwell). Standard PP cosmetic IBM: 5–8 seconds. Standard HDPE lubricant 1L: 7–10 seconds. PCTG pharmaceutical vial: 5–7 seconds. Wide-mouth supplement jar PP: 8–14 seconds
DOMINANT COMPONENT
Üflemeli Duraklama
Blow station dwell (cooling dwell) is the IBM cycle time dominant component for most IBM container formats: 40–70% of total ZQ IBM cycle time is blow dwell cooling. Reducing blow dwell without compromising IBM bottle dimensional stability (wall solidification at blow station) is the primary lever for IBM cycle time optimisation on Korea Ever-Power ZQ programmes. Primary tool: lower ZQ blow mould cooling water temperature (from standard 15°C to 10–12°C) to increase blow station heat flux
SECONDARY LEVER
Injection Fill
Injection fill + dwell (Station 1 time) is the second-largest IBM cycle component (typically 25–45% of total cycle in thin-wall PP IBM). Optimised by: faster injection fill speed (within acceptable PP shear rate for flash-free fill); minimum injection holding pressure dwell (only until gate freeze); and optimal barrel temperature for fast fill without degradation. ZQ injection time target: 1.5–3.5 seconds for standard PP IBM, 2.5–5.0 seconds for HDPE IBM
ZQ MACHINE FACTOR
Index Time
ZQ station-to-station index time (mechanical rotation of the ZQ machine platen and core rod assembly from Station 1 to Station 2 to Station 3) contributes 0.8–2.0 seconds per IBM cycle (fixed ZQ machine mechanical parameter, not adjustable). ZQ60HE all-electric servo index achieves 0.5–0.8 second index versus 1.0–1.5 seconds for hydraulic ZQ standard. Index time saving of 0.5s × 3 stations = 1.5s total per cycle on ZQ60HE vs ZQ60 hydraulic
BÖLÜM 01
IBM Cycle Time Components: Anatomy of ZQ Machine Production Cycle
Every Korea Ever-Power ZQ IBM machine production cycle consists of five sequential time components that sum to the total IBM cycle time determining containers per hour output. Each component has a minimum time floor set by physics (polymer fill dynamics, heat transfer) and machine mechanics (ZQ actuator speed), and an optimum value that balances IBM container quality against production throughput. IBM cycle time optimisation is the process of reducing each component toward its physical minimum without compromising IBM container dimensional, wall or surface quality at production conditions.
ZQ IBM CYCLE TIME · FIVE COMPONENTS AND TYPICAL VALUES
1. Injection Fill
PP: 0.8–2.5s (MFR 15–25 g/10min, 220–235°C). HDPE: 1.5–4.0s (MFR 0.3–1.0 g/10min, 200–220°C). PCTG: 1.0–2.0s (MFR 8–15 g/10min, 245–260°C). Fill time scales with preform volume and polymer viscosity. Minimum limited by gate flash and short-shot risk
2. Injection Packing Dwell
0.5–2.0s all polymers. Holding pressure phase after injection fill: compensates for PP/HDPE/PCTG volumetric shrinkage as melt solidifies in injection cavity. Duration determined by gate freeze time (after gate freezes, further packing has no effect on preform). Minimum: 0.5s (thin gate, high MFR PP); maximum: 2.0s (thick gate, low MFR HDPE)
3. Blow Inflation + Dwell
PP: 2.0–8.0s (thin-wall cosmetic 2.0–4.0s; wide-mouth supplement jar 6.0–8.0s). HDPE: 4.0–15.0s (1L lubricant 4.0–7.0s; 5L industrial 10–15s). PCTG: 3.0–6.0s. Blow dwell = dominant cycle component. Determined by wall thickness and thermal conductivity of polymer and mould cooling capacity
4. Station Index
ZQ standard hydraulic: 1.0–1.5s per rotation (core rod assembly rotates from Station 1→2→3 and back). ZQ60HE all-electric servo: 0.5–0.8s per index (servo motor faster response). 3-station ZQ: 3 indexes per cycle (S1→S2, S2→S3, S3→S1). Total index: 3.0–4.5s hydraulic; 1.5–2.4s electric. Fixed mechanical parameter, not process-adjustable
5. Strip + Eject
0.5–1.5s. IBM bottle stripped from core rod at Station 3 (strip station): core rod retracts while IBM bottle retained on blow mould or by stripper plate, then ejected to output conveyor. Duration set by ZQ strip mechanism speed (hydraulic or servo actuator). Minimum: 0.5s (thin-wall light PP IBM bottle on ZQ40 all-electric); maximum: 1.5s (heavy HDPE pail on ZQ135)
BÖLÜM 02
Blow Station Dwell Optimisation: Cooling Water and Mould Temperature
Cooling Water Temperature: Primary Blow Dwell Lever
ZQ IBM blow mould cooling water temperature is the primary control variable for blow station dwell time optimisation because cooling water temperature directly determines the thermal driving force for IBM bottle wall heat extraction at the blow station. IBM blow mould heat flux (Q) at the blow cavity wall: Q = k × (T_wall − T_coolant) / thickness, where k = mould steel thermal conductivity (H13: 25–28 W/m·K), T_wall = IBM bottle wall contact temperature, T_coolant = cooling water temperature, thickness = H13 mould wall thickness between cooling channel and cavity surface. Reducing cooling water temperature from 18°C to 12°C increases temperature driving force (T_wall − T_coolant) by 6°C (from approximately 170°C to 176°C driving force for PP IBM at 188°C wall contact temperature) — increasing heat flux by approximately 3.5% per °C reduction. For a PP IBM cosmetic bottle at 0.8mm body wall with 3.0 second blow dwell at 18°C coolant: reducing to 12°C reduces minimum dwell to approximately 2.5 seconds (−0.5s, 17% blow dwell reduction) — equivalent to 17% ZQ cycle time reduction if blow dwell was the controlling station time. Cooling water temperature minimum: Korea Ever-Power standard ZQ blow mould cooling water temperature floor is 10°C — below 10°C, risk of moisture condensation on ZQ blow mould cavity external surfaces in Korean summer humidity (RH 70–90% July-August) which can cause rust on H13 mould exterior and moisture droplets falling into IBM bottle cavity at blow station. ZQ blow mould cooling water flow rate: adequate flow rate to maintain turbulent flow in ZQ blow mould cooling channels (Reynolds number >10,000) is required for effective heat transfer — Korea Ever-Power specifies minimum 5 L/min per cooling circuit for ZQ standard IBM blow mould channels.
Minimum Blow Dwell: Quality Constraint
The minimum IBM blow station dwell time is set by the IBM bottle quality constraint — the minimum time the IBM bottle wall must remain against the chilled blow mould cavity surface before the IBM bottle is sufficiently solidified to withstand strip station ejection without dimensional deformation (warpage, wall collapse, base sink). Minimum blow dwell validation at Korea Ever-Power ZQ: progressive dwell reduction test. Starting from conservative dwell (e.g. 4.0s for 500ml PP cosmetic IBM on ZQ60), reduce blow dwell in 0.2-second steps, measuring IBM bottle at each step: body OD roundness (IBM bottle body OD measured at 4 positions, roundness target ≤0.5mm variation); base flatness (IBM bottle base placed on flat surface, gap under base ≤0.3mm pass); body OD change over 2 hours post-ejection (IBM bottle body OD measured at 30 min, 1 hr, 2 hr post-ejection: ≤0.2mm change between 30 min and 2 hr indicates adequate blow station solidification; >0.5mm change indicates under-cooled IBM bottle at strip station). Minimum acceptable blow dwell: the shortest dwell at which IBM bottle body roundness, base flatness and dimensional stability all pass the above criteria, with an additional 0.3–0.5 second safety margin added for production variation. Korea Ever-Power establishes minimum blow dwell per container format during ZQ T1/T2 trial and documents it in the ZQ IBM machine production setup sheet as a non-adjustable process parameter during commercial production.
BÖLÜM 03
Injection Station Optimisation: Fill Speed, Barrel Temperature and Gate
Injection Fill Speed Optimisation on ZQ
ZQ IBM injection fill speed (ZQ ram speed in mm/s or injection volume rate in cm³/s) directly controls injection fill time and therefore Station 1 cycle contribution. Optimum fill speed balances: minimum fill time (fastest IBM cycle contribution from Station 1) against quality constraints (no flash at injection cavity parting line from excessive fill pressure; no short-shot in thin preform body sections from inadequate fill speed; no flow marks or splay from excessive shear heating at high fill speed). Korea Ever-Power ZQ injection fill speed optimisation for standard PP IBM: starting at medium fill speed (ZQ ram 30 mm/s), increase to 40–50 mm/s in 5 mm/s steps while monitoring preform weight consistency (target ≤±0.5% weight variation per cavity across 20 consecutive shots) and preform visual quality (no splay marks from excessive shear; no cold-weld seam from very slow fill). Optimum PP IBM fill speed: typically 35–55 mm/s ZQ ram speed for standard PP cosmetic IBM (ZQ40/ZQ60), producing fill time 0.8–1.5 seconds for 10–25g PP preform. HDPE IBM fill speed: lower ZQ ram speed (10–25 mm/s) required for HDPE MFR 0.3–1.0 g/10min (low-MFR HDPE requires slower fill speed to maintain injection cavity pressure below ZQ machine hydraulic system peak limit and prevent mould flash at parting line from pressure spike at fast fill end). HDPE IBM fill time: typically 2.0–4.0 seconds for 50–250g HDPE lubricant preform. Gate size effect on injection fill speed: larger IBM gate (pin gate diameter 1.5–3.0mm for IBM vs injection moulding 0.5–1.5mm) allows faster polymer flow at same injection pressure, enabling faster fill speed without shear heating overload; IBM gate size is designed at injection cavity gate by Korea Ever-Power mould engineering to allow optimum fill speed at production conditions.
Injection Packing Dwell Minimisation
ZQ IBM injection packing dwell (the holding pressure phase after injection fill, also called injection dwell) must be long enough for IBM injection gate to freeze (gate solidifies at ZQ injection cooling time, preventing back-flow of melt from injection cavity), but must not exceed gate freeze time as additional packing dwell beyond gate freeze adds no value to preform quality while consuming ZQ cycle time. Gate freeze time for IBM injection gate on ZQ machines: IBM pin gate (1.5–3.0mm OD) at ZQ injection cavity (mould tool temperature approximately 40–60°C steady-state at Korea Ever-Power Ansan-si production): PP gate freeze time approximately 0.5–1.0 seconds for 1.5–2.5mm gate OD. HDPE gate freeze: 0.8–1.5 seconds. Minimum injection packing dwell therefore: 0.5–1.5 seconds. Korea Ever-Power ZQ packing dwell validation: gate cut test — reduce ZQ packing dwell in 0.1-second steps; if IBM bottle preform shows weight reduction (>0.5% per step) or visual sink mark at gate area, gate has not frozen before packing pressure release. Set ZQ packing dwell = gate freeze time + 0.2 seconds safety margin. Over-setting packing dwell (common conservative practice at IBM producers): many ZQ IBM machine setups use packing dwell 2–3 seconds (conservative), whereas optimised Korea Ever-Power ZQ setup targets 0.7–1.2 seconds packing dwell for standard PP IBM. Saving 1.0–2.0 seconds of unnecessary packing dwell is the second largest IBM cycle time optimisation opportunity after blow dwell reduction.
BÖLÜM 04
Polymer-Specific IBM Cycle Strategies: PP, HDPE and PCTG
| POLYMER | KEY CYCLE CONSTRAINT | OPTIMISATION STRATEGY | TYPICAL ZQ OPTIMISED CYCLE |
|---|---|---|---|
| PP homopolymer (MFR 15–25 g/10min) | Blow dwell for wall crystallisation (PP crystallisation onset 125–135°C; must cool below Tg + safety margin before strip). Injection fill fast due to high MFR — injection rarely constrains cycle | Minimise blow dwell: use 10–12°C cooling water. Parallel cooling in ZQ injection station (cool injection cavity with 15–20°C water during injection dwell). Fast fill at 40–55 mm/s ZQ ram. Minimum packing dwell 0.6–0.8 seconds | 500ml PP cosmetic: 5.5–7.0s total cycle. 300ml PP hand sanitiser: 5.0–6.5s. 100ml PP serum: 4.5–5.5s |
| HDPE (MFR 0.3–1.0 g/10min, lubricant/agrochem grade) | Both injection fill (slow-fill low-MFR HDPE: 2–4 seconds) AND blow dwell (thick-wall HDPE lubricant container: 5–15 seconds) constrain cycle. HDPE crystallises at 120–125°C; thicker wall requires proportionally longer cooling | Aggressive blow mould cooling: 10–12°C water. BeCu insert in blow mould base for thick-wall HDPE. Maximise fill speed within hydraulic pressure limit. Select highest feasible HDPE MFR for equivalent ESCR to minimise fill time | 1L HDPE engine oil: 8–12s. 5L HDPE gear oil: 15–22s. 250ml HDPE brake fluid: 6–9s |
| PCTG (MFR 8–15 g/10min, amorphous) | Blow dwell for amorphous solidification below Tg 80°C (no crystallisation transition — PCTG cools continuously through Tg; blow dwell must ensure IBM bottle below Tg + 20°C safety before strip). Higher mould temperature (18–25°C) required vs PP/HDPE to prevent PCTG surface haze | Mould temperature 18–22°C (not lower; haze risk). Thin PCTG IBM wall (0.5–0.8mm) preferred for fast cooling. Fast PCTG injection fill: MFR 8–15 g/10min allows 35–50 mm/s ZQ ram. Barrel temperature 245–260°C (hot fill for low viscosity, faster fill and adequate preform temperature at blow station) | 30ml PCTG serum vial: 4.5–6.0s. 100ml PCTG antiseptic: 5.5–7.0s. 300ml PCTG supplement: 7.0–9.0s |
BÖLÜM 05
IBM Cycle Time Reference Data: ZQ Machine Output by Container Format
| KONTEYNER FORMATI | ZQ MODELİ | ÇÜRÜKLER | OPTIMISED CYCLE (s) | ÇIKIŞ (şişe/saat) |
|---|---|---|---|---|
| 100ml PP hand sanitiser (0.8mm wall) | ZQ40 | 10 | 5.2–5.6s | ~6,400–6,900 |
| 500ml PP cosmetic spray (0.75mm wall) | ZQ60 | 8 | 5.5–7.0s | ~4,100–5,200 |
| 30ml PCTG serum vial (0.6mm wall) | ZQ40 | 10 | 4.8–6.0s | ~6.000–7.500 |
| 1L HDPE engine oil (1.8mm wall) | ZQ80 | 2 | 8.5–12.0s | ~600–850 |
| 2,270ml PP protein powder jar (2.8mm wall) | ZQ110 | 2 | 12–16s | ~450–600 |
| 20L HDPE industrial lubricant pail (3.2mm wall) | ZQ135 | 1 | 20–28s | ~130–180 |
BÖLÜM 06
ZQ60HE All-Electric IBM vs ZQ60 Hydraulic: Cycle Time Comparison
ZQ60HE All-Electric IBM Cycle Advantages
Korea Ever-Power ZQ60HE all-electric IBM machine achieves shorter cycle times than ZQ60 hydraulic for three reasons related to electric servo actuator performance versus hydraulic actuator. Faster station index: ZQ60HE servo motor station index time 0.5–0.8 seconds per index versus ZQ60 hydraulic 1.0–1.5 seconds. For 3-station ZQ IBM, total index time per cycle: ZQ60HE 1.5–2.4 seconds versus ZQ60 hydraulic 3.0–4.5 seconds. Index time saving: 1.5–2.1 seconds per cycle. At 500ml PP cosmetic IBM (ZQ60 optimised cycle 6.0 seconds): ZQ60HE total cycle (4.0s controlled time + 1.5s electric index = 5.5s versus ZQ60 4.0s controlled + 3.0s hydraulic index = 7.0s) — ZQ60HE advantage 1.5 seconds per cycle ≈ 21% faster. Faster injection: ZQ60HE servo injection achieves faster fill speed response (servo motor follows ZQ controller injection speed profile precisely) and shorter injection deceleration at fill end (servo ramps down injection pressure more precisely at fill end, reducing flash risk from overshoot pressure). Servo injection packing: servo motor maintains precisely the programmed holding pressure versus hydraulic pressure proportional valve variation (±2–5% pressure error in hydraulic system versus servo ±0.1–0.3% error), allowing ZQ60HE minimum packing time reduction vs ZQ60 hydraulic. Precision blow valve: ZQ60HE electric blow air valve opens and closes more precisely than hydraulic IBM blow valve, enabling faster blow inflation sequence. Net ZQ60HE cycle time advantage over ZQ60 hydraulic for standard PP cosmetic IBM: 15–25% shorter cycle, producing equivalent output increase at equal cavity count.
ZQ60HE vs ZQ60: Output and Economics
The cycle time advantage of ZQ60HE all-electric translates to a measurable output increase at equal mould cavity count and equal production shift hours, reducing IBM container unit production cost. ZQ60HE vs ZQ60 output comparison at 500ml PP cosmetic IBM (8-cavity mould): ZQ60HE cycle 5.5 seconds: 8 × 3,600 / 5.5 = 5,236 bottles/hour. ZQ60 hydraulic cycle 7.0 seconds: 8 × 3,600 / 7.0 = 4,114 bottles/hour. ZQ60HE advantage: 1,122 additional bottles/hour = 27% output increase. At 16 production hours/day, 300 days/year: additional IBM bottles from ZQ60HE vs ZQ60 = 1,122 × 16 × 300 = 5.4 million additional 500ml PP cosmetic IBM bottles/year per machine. ZQ60HE energy efficiency: ZQ60HE all-electric servo motor energy consumption approximately 30–50% lower than ZQ60 hydraulic per IBM cycle (hydraulic ZQ pump runs continuously during production while servo motor runs only during actuator movement) — energy saving KRW 3–6M/year at Korean industrial electricity KRW 120/kWh and 16-hour Korean production day, partially offsetting ZQ60HE capital premium. ZQ60HE capital cost premium: Korea Ever-Power ZQ60HE all-electric IBM machine is priced at a premium versus ZQ60 hydraulic equivalent (typical ZQ60HE premium approximately 15–25% above ZQ60 hydraulic purchase price). Korea Ever-Power provides customer with payback analysis for ZQ60HE vs ZQ60 hydraulic selection decision based on customer’s annual IBM volume and Korean or export market IBM container unit value at programme inquiry stage.
MÜHENDİSLİK SIKÇA SORULAN SORULAR
IBM Cycle Time Optimisation Engineering Questions
Soru 01
Why does IBM cycle time increase when cavity count is increased on the same ZQ machine?
IBM cycle time increase with cavity count increase on the same ZQ machine is a common observation at Korea Ever-Power Ansan-si when ZQ IBM programmes upgrade from lower to higher cavity count moulds, and it results from two interrelated effects that make cycle time a non-linear function of cavity count. First, shot weight and injection fill time: higher cavity count = higher total preform shot weight per ZQ injection cycle (more cavities = more polymer injected per shot). At constant ZQ injection ram speed (mm/s), higher shot weight requires longer injection fill time (fill time ≈ shot weight ÷ injection volume flow rate). If ZQ60 moves from 6-cavity to 8-cavity 500ml PP cosmetic IBM at the same injection ram speed 45 mm/s: shot weight increases by 33% (from 6 preforms to 8 preforms per shot); injection fill time increases proportionally by approximately 33% (from 1.2s to 1.6s). This injection fill time increase adds 0.4 seconds to ZQ cycle time — not a concern if blow dwell (3.5s) remains the controlling station time (parallel station architecture means blow dwell controls if blow dwell > injection fill + packing). Second, blow mould cooling area and temperature distribution: higher cavity count means more IBM bottles in the blow mould simultaneously. If ZQ blow mould cooling water flow rate is not increased proportionally with cavity count (increased cooling load from more IBM bottle wall area), average blow mould cooling water temperature increases (cooling water outlet temperature rises as cooling load increases), reducing heat flux from IBM bottle wall to mould. Increased blow mould temperature from higher cooling load extends minimum blow station dwell for adequate IBM bottle solidification. Example: ZQ60 6-cavity 500ml PP IBM at 12°C cooling inlet / 16°C outlet (adequate cooling with 2.8 second blow dwell minimum). Adding 2 cavities (8-cavity): same cooling water flow rate produces 12°C inlet / 19°C outlet (increased ΔT from higher cooling load) — minimum blow dwell increases to 3.2 seconds from 2.8 seconds (0.4s longer) due to reduced thermal driving force from higher mould temperature. Korea Ever-Power addresses cooling flow increase requirement at cavity count change: ZQ60 cooling water flow rate increased from 6 L/min (6-cavity) to 8 L/min (8-cavity) by adjusting ZQ chiller flow valve, maintaining 12°C inlet / 16°C outlet and preserving 2.8 second minimum blow dwell at 8-cavity as at 6-cavity. Confirming this with IBM bottle post-ejection stability test at new cavity count before commercial production is Korea Ever-Power standard practice.
Soru 02
What is the minimum IBM cycle time achievable on Korea Ever-Power ZQ40 for 100ml PP cosmetic bottles?
Korea Ever-Power ZQ40 minimum IBM cycle time for 100ml PP cosmetic IBM bottle (PP homopolymer MFR 20–25 g/10min, 0.7–0.8mm body wall, 24/410 pump neck, standard cylindrical body, 10-cavity mould) at fully optimised ZQ production conditions is approximately 4.5–5.0 seconds. Cycle time breakdown at ZQ40 minimum: injection fill 0.8 seconds (PP MFR 25 g/10min at 230°C barrel, 50 mm/s ZQ40 ram, 10 preforms × 6–8g = 60–80g shot weight, fill time 0.8s at ZQ40 injection capacity); injection packing dwell 0.6 seconds (PP gate freeze at standard 1.5mm gate OD: 0.5s; safety margin 0.1s); station index total (ZQ40 hydraulic 3 stations × 1.0s = 3.0s per cycle; ZQ40HE all-electric 3 stations × 0.5s = 1.5s per cycle): ZQ40 hydraulic 3.0s; ZQ40HE 1.5s; blow dwell 2.0–2.5s (100ml PP IBM bottle 0.7mm wall, 12°C cooling water, Korea Ever-Power validated minimum blow dwell 2.0s at 0.7mm PP body wall and 12°C blow mould); strip + eject 0.5s (light 100ml PP IBM bottle, ZQ40 strip mechanism). ZQ40 hydraulic total minimum: injection (0.8+0.6) + blow (2.0) + index (3.0) + strip (0.5) = 6.9 seconds (cycle time is max of any station time + index + strip: max(1.4s inj, 2.0s blow) + 3.0 index + 0.5 strip = 2.0 + 3.0 + 0.5 = 5.5 seconds). ZQ40HE all-electric total minimum: 2.0 + 1.5 + 0.5 = 4.0 seconds. At 4.0–4.5 seconds cycle time (ZQ40HE) with 10-cavity mould: output 10 × 3,600 / 4.2 = 8,571 bottles/hour. Korea Ever-Power achieves approximately 8,000–9,000 bottles/hour for 100ml PP hand sanitiser IBM at ZQ40 10-cavity all-electric optimised conditions at Ansan-si, confirming against the practical output figure of 6,400–7,200 bottles/hour for the hydraulic ZQ40 equivalent reported in Korea Ever-Power IBM programme output specifications.
Soru 03
Does adding a 4th station to the ZQ IBM machine improve cycle time?
Korea Ever-Power ZQ IBM machines are available in both 3-station (injection, blow, strip) and 4-station (injection, conditioning/blow 1, blow 2/cooling, strip) configurations. The 4-station ZQ IBM configuration improves cycle time efficiency in specific cases where the IBM bottle requires more blow station time than injection time allows within a 3-station parallel cycle. In 3-station IBM, the controlling station time (minimum cycle time) is max(injection time, blow time). If blow time >> injection time — as it often is for thick-wall IBM containers (HDPE lubricant, PP protein jar) where blow dwell is 3–5× injection fill time — injection station is idle during most of the cycle (waiting for blow station to complete). The 4-station ZQ IBM architecture adds a Station 2 (temperature conditioning or pre-blow) between injection and blow, so the cycle splits the blow station work across two stations: Station 2 does initial blow inflation + 50% of blow dwell; Station 3 does remaining 50% of blow dwell + strip; Station 4 does strip + eject. 4-station benefit: if Station 2 blow dwell = 50% of 3-station blow dwell, then the controlling station time in 4-station = max(injection, 50% blow, strip) — if injection time now equals or exceeds 50% blow time, the cycle time is set by injection (not blow) and the ZQ machine runs at maximum injection-side efficiency. Example: 2,270ml PP protein jar IBM on ZQ110: injection time 2.8s; 3-station blow dwell 12s. 3-station cycle: max(2.8, 12) + index + strip = 12 + 2.0 + 1.0 = 15s. 4-station cycle: 50% blow per station = 6s; max(2.8, 6.0, 1.0) + index = 6.0 + 2.5 = 8.5s — 4-station cycle 8.5s versus 3-station 15s = 43% cycle time reduction for thick-wall PP protein jar IBM on ZQ110 4-station configuration. Korea Ever-Power ZQ110 and ZQ135 IBM machines can be configured as 4-station for wide-mouth jar and thick-wall industrial container IBM programmes where blow dwell dominates the 3-station cycle time. The 4-station IBM also inherently doubles the number of core rods required (each IBM bottle occupies two stations simultaneously in 4-station), increasing IBM mould tooling cost by approximately 30–50% for core rod addition versus 3-station core rod set alone.
Soru 04
How does Korea Ever-Power verify that cycle time reduction does not compromise IBM bottle quality?
Korea Ever-Power Ansan-si IBM cycle time reduction validation protocol confirms that cycle time reduction does not compromise IBM bottle dimensional stability, wall distribution or surface quality through a structured measurement sequence at each cycle time step change. Protocol for blow dwell reduction validation (most common ZQ cycle time optimisation): starting from production baseline dwell (confirmed stable), reduce blow station dwell in 0.2–0.5 second steps. At each step, produce 50 consecutive IBM bottles per cavity at the reduced dwell, then measure: (A) IBM bottle body OD roundness at 2 minutes post-ejection: measured at 4 circumferential positions with digital caliper; target ≤0.5mm variation between 4 positions. IBM bottle failing roundness at a reduced dwell step indicates insufficient wall solidification at blow station for that dwell — IBM bottle distorts after ejection from residual thermal gradient in wall. (B) IBM bottle base flatness at 2 minutes post-ejection: place IBM bottle on flat reference surface, measure maximum gap under bottle base with feeler gauge; target ≤0.3mm gap. Base warpage indicates IBM bottle base not fully solidified at reduced blow dwell. (C) IBM bottle body OD temporal stability at 30 minutes and 2 hours post-ejection: re-measure body OD at 4 positions at 30 min and 2 hr. Body OD change >0.2mm between 30 min and 2 hr measurement indicates significant post-ejection shrinkage from under-solidification at blow station. Pass criterion at each dwell step: all three measurements pass criteria simultaneously for all cavities. The cycle time optimisation dwell limit is the shortest dwell at which all criteria pass, minus 0.2 seconds safety margin. This dwell is set as the production minimum blow dwell and recorded in ZQ machine production setup sheet. Same protocol applied for injection packing dwell reduction: IBM bottle preform weight checked for consistency (±0.5% target) at each packing dwell reduction step.
Soru 05
What is the IBM cycle time impact of colour masterbatch addition versus natural resin on ZQ machines?
Colour masterbatch addition (typically 1–4% loading of PP or HDPE carrier masterbatch at Korea Ever-Power ZQ gravimetric dosing unit) has a generally minor effect on IBM cycle time compared with base resin processing, but there are specific masterbatch types and loading levels that can extend IBM cycle time or require ZQ process adjustment. TiO2 white masterbatch (standard for white PP IBM cosmetic and household chemical bottles: TiO2 loading 2.0–3.0% in PP carrier at 3% masterbatch addition): TiO2 white masterbatch slightly reduces PP IBM injection flow (TiO2 filler increases PP melt viscosity by 5–10% at IBM processing temperature) — minor ZQ fill time increase (<0.1 second at 3% TiO2 masterbatch in standard PP MFR 20 g/10min for 500ml IBM bottle). No IBM blow dwell change from TiO2 white: TiO2 does not affect PP crystallisation temperature or thermal conductivity significantly at 3% loading. Black PP masterbatch (carbon black at 1.0–1.5% in PP carrier): carbon black is a thermal stabiliser at low loading and has negligible IBM cycle time effect. At very high loading (>3% carbon black), slight PP viscosity increase may require minor ZQ barrel temperature adjustment (+3–5°C) to maintain equivalent fill time. Pearlescent or metallic masterbatch (mica flake or aluminium flake at 1–3% in PP carrier for premium cosmetic IBM): mica flake particles (aspect ratio 20:1–50:1, particle size 10–100μm) slightly reduce PP melt flow in IBM injection cavity (aligned mica flakes restrict flow in narrow annular preform body passages). ZQ IBM process adjustment for pearlescent PP: reduce injection fill speed by 10–15% and increase barrel temperature by 3–5°C to maintain complete IBM preform fill without flow marks from mica platelet orientation patterns in preform wall. IBM blow dwell is unaffected by pearlescent masterbatch at standard 1–3% loading. Heat-sensitive masterbatch (organic pigment at high temperature-sensitive concentration): some organic pigments in PP IBM degrade above 240°C, requiring ZQ barrel temperature management (limit barrel peak temperature at Zone 3 nozzle to ≤235°C for heat-sensitive organic red, orange and yellow pigment masterbatch) — this temperature constraint may require slightly longer IBM injection fill time (melt viscosity slightly higher at 235°C vs 240°C) but typically <0.2 second IBM cycle time impact.
Soru 06
How does Korea Ever-Power calculate annual IBM machine capacity utilisation for a new programme?
Korea Ever-Power Ansan-si calculates IBM machine capacity utilisation for new programme commercial production planning using a structured output and efficiency model that accounts for ZQ machine theoretical output, planned downtime and production efficiency factors. Annual IBM machine available time: Korea Ever-Power Ansan-si standard production calendar = 300 production days per year × 16 production hours per day (two 8-hour shifts per day, with 2 hours per day for start-up, warm-up, line changeover and end-of-shift cleaning) = 4,800 machine-hours per year available. This is the maximum available IBM machine time before subtracting planned downtime. Planned downtime deductions: scheduled preventive maintenance (ZQ machine PM: 8 hours/month × 12 months = 96 hours/year); colour and resin changeover (average 2 changes/week × 0.5 hour each × 50 weeks = 50 hours/year); mould change (average 1 change/month × 2 hours = 24 hours/year); public holiday and Korean statutory shutdown (approximately 12 Korean national holidays affecting 2-shift operation = 24 hours/year). Total planned downtime: 96 + 50 + 24 + 24 = 194 hours/year. Net planned production time: 4,800 − 194 = 4,606 hours/year. Production efficiency (OEE performance factor: actual IBM output versus theoretical output during planned production time): Korea Ever-Power ZQ IBM standard OEE performance approximately 85–90% (10–15% unplanned micro-stops, short resin feed interruptions, IBM bottle jam at strip station, quality check holds). Net IBM machine effective production time: 4,606 × 0.87 (OEE midpoint) = 4,007 effective production hours per year. IBM machine annual output calculation: effective production hours (4,007) × ZQ machine output (bottles/hour at optimised cycle) = annual IBM bottle output per ZQ machine. Example for ZQ60 8-cavity PP 500ml cosmetic IBM at 4,500 bottles/hour optimised output: annual output = 4,007 × 4,500 = 18.0 million 500ml PP cosmetic IBM bottles per ZQ60 machine per year. Korea Ever-Power programme capacity utilisation: new programme annual volume requirement / (annual output per ZQ machine). If new programme requires 5 million 500ml PP cosmetic IBM bottles/year: capacity utilisation = 5,000,000 / 18,000,000 = 27.8% of one ZQ60 machine. Korea Ever-Power offers dedicated or shared ZQ IBM machine time based on programme capacity utilisation percentage at Ansan-si programme planning stage.
IBM CYCLE TIME ENGINEERING · KOREA EVER-POWER
Need IBM Cycle Time Optimisation Support?
Korea Ever-Power Ansan-si provides ZQ IBM machine cycle time engineering, blow dwell optimisation and production capacity modelling for all PP, HDPE and PCTG IBM container programmes on ZQ40 through ZQ135.
Editör: Cxm
