ZL-20T 20 Ton Industrial FRP Counter Flow Cooling Tower - Injection Molding
The ZL-20T 16 m³/h flow at 5°C range covers typical injection mold cooling circuits:
Mold cooling water flow: Typical flow rate 4-8 L/min per mold cavity. ZL-20T supports 33-67 cavity molds (or 2-4 large multi-cavity molds) at design flow.
Temperature stability: Mold cooling water at 25-30°C maintained within ±1°C by ZL-20T leaving water temperature control. Critical for cycle time consistency and part quality.
Cooling water quality: Filtered to 50 µm to prevent nozzle clogging in mold cooling channels. ZL-20T integrated strainer removes larger particulates.
Heat load per shot: 200-ton press at 200g shot weight dissipates 15-25 kW during injection cooling. ZL-20T supports 3-4 such presses at peak load.
Annual operating cost: ZL-20T USD 482 fan energy + USD 200 pumping + USD 150 water treatment = USD 832/year per cooling tower serving injection molding line.
Consistent mold cooling water temperature directly affects injection molding cycle time and part quality:
Cycle time impact: ±2°C cooling water variation causes ±3-5% cycle time variation. Maintaining 32°C ±1°C supports tight production scheduling.
Part quality: Cooling water temperature drift causes warping, sink marks, and inconsistent shrinkage. ZL-20T 5°C approach stability minimizes these defects.
Process capability: For Cpk targets 1.33+, cooling water temperature variation must stay below ±1°C. ZL-20T approach stability supports statistical process control requirements.
Production rate: 5% cycle time improvement from stable cooling = approximately USD 50,000/year additional production value for typical mid-size molding facility.
Scrap reduction: Stable cooling reduces part rejection by 10-15%, supporting lean manufacturing goals.
The ZL-20T 70 kW capacity covers typical multi-press plant configurations:
200-ton press + ZL-20T: Single 200-ton press at 30 kW peak heat load. ZL-20T 70 kW capacity supports 2 presses at average load with 100% overhead for peak demand.
350-ton press + ZL-20T: Single 350-ton press at 50 kW peak. ZL-20T covers 1 press with moderate peak load margin.
Multi-press plant (4 presses, 200-300 ton): Total peak load 100-150 kW. 2-3 ZL-20T units in parallel support full plant cooling with N+1 redundancy.
Injection molding facility planning: ZL-20T units scale with production capacity. Standard practice: 1 ZL-20T per 2-3 presses depending on shot weight and cycle time.
Centralized vs distributed cooling: Single ZL-20T serves 2-3 presses at point of use (distributed), or multiple ZL-20T in central plant serve larger facility (centralized). Both configurations supported.
The ZL-20T cooling water chemistry compatible with common mold materials:
P20 tool steel: Standard injection mold material. ZL-20T cooling water at 25-30°C supports P20 with corrosion inhibitor treatment.
H13 hot work steel: High-temperature mold material for engineering plastics. Compatible with ZL-20T standard water treatment regime.
S136 stainless: Corrosion-resistant mold material for PVC and corrosive plastics. ZL-20T SS316L upgrade recommended for these applications.
Beryllium copper mold inserts: High thermal conductivity inserts. Compatible with ZL-20T standard water chemistry.
Cooling channel corrosion: Standard ZL-20T water treatment prevents corrosion in steel mold cooling channels. Annual mold inspection recommended.
For high-end mold applications, ZL-20T SS316L upgrade minimizes cooling system corrosion risk.
The ZL-20T 70 kW heat rejection represents significant thermal energy that can be recovered:
Heat recovery options: ZL-20T heated water (35-40°C leaving water at peak load) can pre-heat facility domestic hot water or feed absorption chillers for combined cooling and heating.
Energy savings: 30% of mold cooling waste heat recoverable at 50% efficiency = 10 kW thermal energy = USD 5,000/year value at commercial gas rates.
Carbon impact: Heat recovery offsets gas consumption, reducing facility Scope 1 emissions by 15 tonnes CO2/year per ZL-20T.
Implementation cost: Heat exchanger piping USD 500-1,000 per ZL-20T installation. Payback 1-2 years for facilities with year-round heating demand.
For plastic processing facilities pursuing circular economy or net-zero emissions, ZL-20T heat recovery is a viable component.
The ZL-20T supports both closed-loop and once-through cooling configurations for injection molding:
Closed-loop (recommended): ZL-20T cools tower water, which circulates through mold cooling circuits. Closed system minimizes water consumption and treatment requirements.
Once-through (legacy): Cooling water drawn from facility source, used once, and discharged. Higher water consumption but no cooling tower requirement.
Hybrid configuration: ZL-20T supplements once-through cooling during peak summer loads. Reduces water consumption by 40% compared to pure once-through.
Water cost comparison: Closed-loop ZL-20T operating cost: USD 832/year energy + water. Once-through cost: USD 5,000-15,000/year water (depending on local rates). Closed-loop is 6-18x more cost-effective.
For injection molding facilities with significant water costs, ZL-20T closed-loop configuration delivers rapid ROI.
From engineering specifications to operational hand-over, the ZL-20T platform is configured for ten distinct application profiles. Explore the other nine below: