Water Drain for Injection Molding Machine

3 month ago

9 0 

Ningbo Hengnuo Hydraulic Drive Co.,Ltd

4 year

Product details

Water Drainage System for Injection Molding Machine

Basic Information

- System Name: Injection Molding Machine Water Drainage / Cooling Water Discharge System

- Application: Mainly used for cooling circuit drainage of injection molding machine mold, barrel, hydraulic oil cooler, servo motor and electrical cabinet

- Core Purpose: Discharge cooling circulating water, remove residual water after shutdown, prevent water accumulation, rust, scale blockage, water leakage and mold corrosion, ensure stable cooling effect and long‑term machine operation.

Main Components

1. Drainage Pipes & Hoses: PVC / high‑pressure rubber hoses, stainless steel pipes for high‑temperature parts

2. Drainage Valves: Ball valves, quick‑release water discharge valves, one‑way check valves

3. Water Collecting Manifold: Central water distribution and drainage row for mold cooling water

4. Drainage Pump (optional): Small water pump for forced drainage in complex mold circuits

5. Water Filters: Pre‑filter for cooling water to reduce impurities and scale

6. Fittings: Quick connectors, tees, elbows, seals and pipe clamps

Working Principle

Cooling water circulates through mold cooling channels, barrel cooling jacket and heat exchangers to take away heat; after production stops or mold replacement, open drainage valves to discharge residual water in pipelines and molds, avoid water retention and scale formation, and keep the cooling system unobstructed.

Key Functions

1. Remove residual cooling water to prevent mold rust and water spot defects on products

2. Prevent pipeline blockage caused by scale and sediment accumulation

3. Avoid water leakage into electrical parts causing short‑circuit failure

4. Improve cooling efficiency, stabilize product molding quality

5. Extend service life of mold and machine cooling components

Common Faults & Problems

1. Pipeline blockage: Poor drainage, mold water residue, long cooling time

2. Valve leakage: Water dripping, wet workshop environment, electrical safety risk

3. Scale buildup: Narrow water channels, insufficient cooling effect, product deformation

4. Poor drainage layout: Water accumulation in dead corners, mold corrosion

Installation & Maintenance Requirements

1. Layout with slope design to ensure gravity drainage

2. Install drain valves at the lowest points of mold and cooling pipelines

3. Regularly clean scale and sediment every 1–3 months

4. Replace aging hoses and seals to prevent cracking and leakage

5. Ensure smooth drainage to avoid backflow of cooling water

I. Core Functions

1. Temperature Control

• Absorbs heat from the mold via circulating cooling water to prevent defects such as deformation, shrinkage, or scorching caused by overheating.

• Maintains uniform mold temperature to minimize dimensional variations in molded parts.

2. Drainage & Anti-Clogging

• Rapidly discharges accumulated water from the mold to avoid scale buildup and blockages, reducing equipment failure rates.

• Equipped with check valves or pressure-free plug-and-play designs to prevent water splashing during mold disassembly/assembly, ensuring operational safety.

3. High-Efficiency Cooling

• Turbulent flow design breaks laminar flow limitations, improving cooling efficiency by over 30%.

• Intelligent temperature control systems (e.g., PLC-based) adjust parameters in real time, maintaining temperature deviations within ±5°C to reduce defect rates.

II. System Components

1. Main Water Drain Unit

• Divider/Distributor: Evenly allocates cooling water to multiple mold circuits, supporting configurations like 6-inlet, 6-outlet setups.

• Piping & Connectors: Uses high-pressure, corrosion-resistant materials (e.g., brass, stainless steel) compatible with various mold interface sizes (e.g., G3/8", 1/2" hoses).

• Valves & Flow Regulators: Ball valves or flow control valves enable precise adjustment of water volume per circuit.

2. Auxiliary Components

• Filters: Purify cooling water to prevent impurities from entering mold water channels.

• Temperature Sensors: Monitor water temperature in real time and feed data to the control system.

• Quick Couplings: Facilitate rapid mold changes, reducing downtime (e.g., some systems cut mold change time from 45 minutes to 2 minutes).

III. Technical Features

1. Modular Design

• Supports independent control of multiple circuits for complex mold cooling requirements.

• Compact structure allows installation inside or outside the injection molding machine, saving space.

2. Durability

• High-temperature, high-pressure-resistant materials ensure long-term reliability under continuous operation.

• Corrosion-resistant coatings extend service life (e.g., up to 20 years for some systems).

3. Energy Efficiency & Cost Reduction

• Faster cooling shortens production cycles and boosts output (e.g., one enterprise reduced cooling time from 62s to 45s, increasing monthly production by 30,000 units).

• Intelligent temperature control lowers energy consumption, reducing total costs by RMB 220,000 per kilometer (as seen in a Hangzhou project).

IV. Applications

1. Multi-Variety, Small-Batch Production

• Rapid mold change systems paired with water drains enable multiple mold switches per day (e.g., Suzhou Industrial Park achieved daily switches for three different irregular molds).

2. High-Precision Injection Molding

• Intelligent temperature control and turbulent flow design ensure stable mold temperatures for demanding products like automotive parts and electronic connectors.

3. Large-Scale Injection Molding Machines

• Low-pressure loss design supports high-flow applications (e.g., the 310 series offers 0–30 L/min per circuit).

V. Selection Guidelines

1. Choose Circuit Configuration Based on Mold Complexity

• Simple molds: Single-inlet/single-outlet or dual-inlet/dual-outlet systems.

• Complex molds: 6-inlet/6-outlet or multi-circuit systems for uniform cooling.

2. Verify Flow & Pressure Parameters

• Ensure the system’s maximum flow and pressure match the cooling demands of the injection molding machine.

• Prioritize models with flow regulators for flexible adjustments.

3. Consider Maintenance Convenience

• Select systems with filters and quick couplings for simplified cleaning and mold changes.

• Evaluate anti-leakage designs (e.g., check valve structures) to reduce operational risks.