Mold Chiller
Mold Chiller
Multiple domestic manufacturers for bidding. Free publication. Price to be negotiated between winning bidder and buyer.
Information required for inquiry posting:
- Water‑cooled or air‑cooled chiller; 2. Required temperature range; 3. Refrigeration capacity requirement; 4. Purchase quantity
表格
| Type | Heat Dissipation Principle | Main Features | Application Scenarios |
|---|---|---|---|
| Air‑cooled Chiller | Built‑in fan blows across fin‑type condenser to discharge heat into ambient air. | Simple installation, easy relocation, no cooling tower required; relatively lower COP, demanding on site ventilation condition. | Small‑&‑medium‑size injection‑molding workshops, water‑scarce or poor‑water‑quality regions, frequent‑relocation applications. |
| Water‑cooled Chiller | Heat is removed by circulating cooling‑tower water through shell‑and‑tube condenser. | High COP, large refrigeration capacity, stable operation; dependent on matched cooling tower & circulating pump, complicated installation. | Large‑scale injection‑molding workshops, high cooling‑load scenarios, factories with existing stable cooling‑water system. |
Core Technical Specifications
Refrigeration Capacity: Core performance index, unit: kW or kcal/h（1 kW ≈ 860 kcal/h）, represents heat‑removal capability. Oversized capacity wastes energy; undersized capacity fails cooling demand.
Empirical estimation: 1HP water‑cooled chiller for 5‑10 ℃ water temperature can roughly match injection‑molding machine of 80‑ton clamping force. Precise calculation formula：\(Q = W × C × △T × S\) Q: required refrigeration capacity; W: hourly material throughput; C: specific heat capacity of plastic; △T: temperature difference between melt and demolding temperature; S: safety factor.
Common capacity range: 3HP (~6 800 kcal/h) up to 560HP extra‑large units, covering small‑size to super‑large injection‑molding machines.
Temperature Control Range & Accuracy: Determines compliance with process requirements. ‑ Temperature range: standard chiller delivers chilled water 5℃‑35℃. Special processes such as transparent PC parts and PET preforms require low‑temperature models below 5 ℃ (antifreeze fluid needed for sub‑zero operation). ‑ Temperature accuracy: general application ±1℃~±2℃; precision molding & thin‑wall products require PID micro‑computer control with accuracy up to ±0.5 ℃.
Pump Flow & Pressure: Power guarantee for chilled‑water circulation inside mold cooling channels. ‑ Flow rate(L/min): Estimation formula: refrigeration capacity ÷ inlet‑outlet temperature difference ÷ 60. Example: heat load 6480 kcal/h, ΔT=3 ℃, minimum required flow 36 L/min. ‑ Pressure / Head: Regular molds demand 0.1‑0.2 MPa (10‑20 m head). Complex molds with narrow & long cooling channels require high‑pressure pump above 30 m head.
Water Quality & Maintenance: Easily‑ignored but critical factor. ‑ Hard water and improper pH value (optimal pH≈7) cause scaling and corrosion. Scale reduces heat‑exchange efficiency by up to 30 %. ‑ Recommended counter‑measures: equip electronic water softener or regularly apply descaling agent to protect molds and chillers.
Selection Guidelines
- Calculate cooling load first, then select cooling mode: Estimate or compute required refrigeration capacity according to plastic products, then choose air‑cooled or water‑cooled type.
- Match accuracy with product grade: Ordinary daily goods tolerate ±1~±2 ℃ fluctuation; optical and precision‑electronic parts require high‑precision ±0.5 ℃ models.
- Flow‑pressure determined by mold cooling channels: Short‑wide channels prioritize high flow; narrow‑long channels prioritize high pump head. Provide mold parameters to supplier for accurate selection.
- Water‑quality solution shall be considered in procurement plan: Avoid efficiency drop and frequent maintenance caused by scale.
- Verify built‑in safety protections: Phase‑loss / phase‑reversal protection, pump overload protection, compressor overload protection, high‑low pressure protection, anti‑freezing protection for continuous safe production.
Participation Process
Manufacturers: Contact supplier service for supply registration.
Buyers: Click group‑purchase or contact procurement service to submit requirements. The platform filters suppliers from database or releases bidding based on aggregated demands. Buyers select competitive suppliers and sign sales contracts.
