How to Clean Long, Narrow, Deep and Complex Mold Channels

Internal mold channels can include curved passages, blind channels, long narrow channels, deep-hole channels, multiple parallel cooling circuits, and other complex configurations.

DOUBLE EASY's Mold Channel Cleaning Machine is designed for these types of internal mold-channel structures.

The machine uses DOUBLE EASY's independently developed DBHM Air-Water Hybrid Air-Blast Pulse Technology, which mixes high-speed water flow with high-pressure compressed air to generate high-frequency air-blast shock waves for removing deposits from mold channels.

The system also provides intelligent variable-frequency control, one-way and two-way cleaning, multi-channel cleaning, flow monitoring, individual-channel flow testing, and leak and pressure testing.

What Types of Complex Mold Channels Can the Machine Clean?

Supported channel configurations include:

Curved Channels

Curved channels are included among the mold-channel structures for which the Mold Channel Cleaning Machine is designed.

Blind Channels

Blind channels are also a supported mold-channel configuration.

Long Narrow Channels

Long narrow channels are specifically identified as an application of the DBHM cleaning system.

Deep-Hole Channels

Deep-hole mold channels are also supported.

Multiple Parallel Cooling Circuits

The system is designed for molds containing multiple parallel cooling circuits.

Complex Mold-Channel Configurations

Complex mold-channel configurations are also supported by the Mold Channel Cleaning Machine.

This industry example describes cleaning solutions for complex cooling channels with bends and difficult internal passages.

Why Do Mold Channels Become Restricted or Blocked?

Calcium and magnesium ions in circulating water can precipitate and form hard mineral scale.

Other contaminants can also accumulate inside mold channels, including:

1. Rust particles

2. Production dust

3. Water impurities

4. Other contaminants

Over time, the channels can become narrower, partially blocked, or locally completely blocked.

Deposits on the internal channel walls can also create an insulating layer that reduces mold heat-transfer efficiency.

Mold cooling systems that operate continuously for long periods can be susceptible to contamination and blockage.

Long and Complex Channels in Blow-Molding and Vacuum-Forming Applications

Blow-molding and vacuum-forming applications include:

1. Plastic bottles

2. Chemical plastic drums

3. Large vacuum-formed housings

4. Packaging components

These large molds often contain long and complex cooling channels.

Impurity accumulation and localized blockage in these channels can directly affect forming flatness.

Mold-Channel Conditions in Die-Casting Applications

DOUBLE EASY also serves aluminum-alloy, zinc-alloy, and magnesium-alloy die-casting manufacturers.

Die-casting applications include:

1. Automotive die-cast components

2. 5G communication housings

3. Motor housings

4. New-energy metal components

5. Other precision die-cast parts

Die-casting molds operate at high temperatures, making their internal cooling channels susceptible to:

1. Rust

2. Carbon deposits

3. Scale

These applications have strict requirements for cooling uniformity.

Why Can Traditional Cleaning Methods Be Limited for Deep or Complex Channels?

Several traditional mold-channel cleaning methods can be limited for deep or complex channels.

Manual, Needle and High-Pressure Water-Gun Cleaning

Manual, needle, and high-pressure water-gun cleaning mainly removes contamination near mold-channel openings.

Their limitations include:

1. Cannot effectively remove deep scale or sludge

2. Can damage thin-wall channels

3. Requires longer shutdown time

4. High labor cost

5. Inconsistent cleaning results

6. Difficult to standardize

Ultrasonic Cleaning

Ultrasonic cleaning is suitable for:

1. Mold-surface oil

2. Mold-release agents

3. Surface rust

However, for internal cooling-channel maintenance, limitations include:

1. Cannot effectively access deep enclosed mold channels

2. Limited effectiveness in curved, irregular, long, narrow internal passages

3. Cannot replace dedicated Mold Channel Cleaning Machines for internal cooling-channel maintenance

How DOUBLE EASY DBHM Technology Cleans Mold Channels

The DOUBLE EASY Mold Channel Cleaning Machine uses high-speed, high-pressure DBHM air-water hybrid air-blast pulse technology.

High-speed water flow is mixed with high-pressure compressed air to create high-frequency air-blast shock waves.

The process is designed to remove:

1. Stubborn mineral scale

2. Thick rust deposits

3. Hardened biological deposits

4. Deposits in hard-to-reach areas

The pulse-blast function is also used to strip scale and rust from internal mold-channel walls.

DOUBLE EASY states that the scale-removal rate can reach more than 99%.

Intelligent Variable-Frequency Adaptive Cleaning

The Mold Channel Cleaning Machine incorporates an intelligent variable-frequency control system.

The system is designed to automatically identify:

1. Mold-channel diameter

2. Blockage severity

3. Deposit type

It then dynamically adjusts:

1. Pulse frequency

2. Water-pressure intensity

without repeated manual adjustment.

Cleaning parameters can be adaptively matched to:

1. Thin-wall precision molds

2. High-pressure die-casting molds

3. Large multi-circuit molds

The system is designed to avoid excessive pressure impact, channel deformation, and corrosion damage.

The system is also intended for high-precision applications including medical, new-energy, and optical molds.

Adjustable Pulse-Cleaning Parameters

The pulse-cleaning system allows operators to adjust:

1. Pulse start duration

2. Pulse stop duration

3. System air pressure

4. Cleaning water pressure

The pulse-blast function is used to help strip scale and rust deposits from internal mold-channel walls.

One-Way and Two-Way Cleaning

The Mold Channel Cleaning Machine supports both one-way and two-way cleaning.

One-way cleaning performs cleaning in a single direction.

Two-way cleaning performs forward and reverse cleaning through the mold channel.

During two-way cleaning, pulse cleaning is performed in both forward and reverse directions.

Integrated functions include forward cleaning, reverse cleaning, one-way cleaning, two-way cleaning, and continuous pulse cleaning.

Cleaning Multiple Mold Channels

The machine comes with nearly ten sets of universal and specialized connectors and can support multiple mold channels simultaneously.

Depending on the machine model, connection configurations include:

1. 5 inlet / 5 outlet

2. 7 inlet / 7 outlet

3. 8 inlet / 8 outlet

Multi-channel cleaning is also one of the Mold Channel Cleaning Machine's functions.

Actual specifications depend on the selected machine model and equipment nameplate.

An injection mold workshop waterway-cleaning case provides practical context for integrating the equipment into routine production.

Flow-Rate Monitoring

Applicable machine configurations use a KEYENCE ultrasonic flowmeter to measure water flow.

The operating interface displays the current system flow rate.

Cleaning records can also show changes in mold-channel flow rate before and after cleaning.

Individual-Channel Flow Testing

The Mold Channel Cleaning Machine provides a dedicated Flow Test function.

Operators can:

1. Select an individual channel

2. Set a target reference flow value

3. Set the test duration

4. Start flow detection

5. View real-time flow changes

6. View the detected flow value after testing

7. Receive an advisory prompt when detected flow falls below the preset reference threshold

Cleaning Records and Before-and-After Flow Comparison

The machine supports:

1. Before-and-after mold-channel flow comparison

2. Cleaning-data storage

3. Traceable maintenance records

4. MES system integration

5. Endoscopic visual inspection

These functions are intended for digital maintenance and quality-audit requirements in:

1. New-energy manufacturing

2. Medical manufacturing

3. Precision-electronics manufacturing

4. Other high-precision manufacturing applications

Leak and Pressure Testing Before Cleaning

Before cleaning, the machine can perform leak and pressure testing on the connected mold channel.

The test result can display:

1. Normal

2. Leak

3. Blockage

The operating procedure specifies a default leak and pressure test duration of approximately 50 seconds.

The leak-test interface also includes:

1. Pressure-drop value

2. Pressure-holding time

3. System air pressure

4. Pressurization time

Operating Pressure Parameters

The equipment supports stable high-pressure operation at 0.8 MPa and is designed for pressure resistance, corrosion resistance, and high-temperature resistance.

Operating-pressure parameters include:

1. Compressed-air supply: 0.5–0.8 MPa

2. Standard cleaning-water pressure: approximately 0.5 MPa

For applicable dual-tank machines in manual cleaning mode, the cleaning-water-pressure setting range is approximately 0.2–0.5 MPa.

Actual equipment specifications depend on the selected model and equipment nameplate.

Cleaning Without Mold Disassembly

The Mold Channel Cleaning Machine supports cleaning without mold disassembly and without stopping production.

The mold does not need to be dismantled, and cleaning can be performed without interrupting factory production schedules.

The system is designed to reduce the time and production losses associated with traditional mold disassembly and cleaning.

Cleaning Media for Mold Channels

DOUBLE EASY uses a neutral, environmentally friendly cleaning medium with:

1. Non-corrosive characteristics

2. No heavy-metal contamination

3. Easier waste-liquid handling

4. Cleaning-solution recycling

For serious blockage or first-time cleaning after extended mold use, a dedicated solid-powder cleaning agent can be used.

The instructions state that strong-acid cleaning agents should be avoided because long-term use may damage the water tank and internal machine components.

Mild citric-acid detergent is mentioned as an alternative.

Water Supply Requirements

The machine should use clean municipal water.

Cleaning-agent guidance includes:

1. Reclaimed water should not be used.

2. Groundwater should not be used.

For cleaning-agent applications, the solid cleaning agent can be placed in a nylon filter bag to accelerate dissolution.

One bottle of cleaning agent can clean 2–3 sets of molds.

Blow-Dry and Drainage After Cleaning

The Mold Channel Cleaning Machine provides a compressed-air blow-dry function for discharging residual water from the mold and connected piping after cleaning.

The system allows configuration of:

1. Drainage duration

2. Number of drainage cycles

3. Drainage interval

Precision and High-End Manufacturing Applications

Precision and high-end applications include:

1. Medical device molds

2. Optical lens molds

3. New-energy plastic components

4. Battery housings

5. Charging-pile components

6. Precision electronic components

These products require extremely high precision.

Even small differences in mold cooling temperature can result in batch defects, creating stringent requirements for:

1. Mold-channel cleanliness

2. Temperature-control stability

Mold-Channel Cleaning and Cooling Performance

Deep mold-channel cleaning removes:

1. Stubborn scale

2. Rust

3. Sludge

4. Biological deposits

and restores channel flow.

Restoring heat-transfer performance and more uniform mold cooling can help address:

1. Warpage

2. Shrinkage

3. Bubbles

4. Cracking

Improved cooling efficiency can shorten cooling-cycle time and increase production output.

Improved heat transfer can reduce the operating load on chillers and mold temperature controllers.

Preventive Maintenance for Mold Channels

Mold-channel maintenance is shifting from repairs after product defects or complete blockage toward routine preventive cleaning.

Periodic cleaning is increasingly being incorporated into standardized mold-maintenance programs.

Regular mold-channel cleaning can help reduce risks including:

1. Corrosion

2. Thermal cracking

3. Channel perforation

4. Premature aging

5. Major repairs

6. Mold replacement

FAQ

Can the DOUBLE EASY Mold Channel Cleaning Machine clean long, narrow mold channels?

Yes. Long narrow channels are specifically listed among the mold-channel configurations for which the machine is designed.

Can the machine clean blind and deep-hole channels?

Yes. The machine is designed for both blind channels and deep-hole channels.

Can the system clean multiple cooling circuits?

The machine is designed for multiple parallel cooling circuits and large multi-circuit molds. It can also support multiple mold channels simultaneously depending on the machine configuration.

Can multiple mold channels be connected at the same time?

Yes. The equipment can support multiple mold channels simultaneously, depending on the machine configuration.

Why is ultrasonic cleaning limited for complex internal channels?

Ultrasonic cleaning cannot effectively access deep enclosed mold channels and has limited effectiveness in curved, irregular, long, narrow internal passages.

Can the machine automatically adapt its cleaning parameters?

The system is designed to identify mold-channel diameter, blockage severity, and deposit type and dynamically adjust pulse frequency and water-pressure intensity.

Can an individual mold channel be tested?

Yes. The Flow Test function allows operators to select an individual channel, set a target reference flow value and test duration, observe real-time flow changes, and view the detected flow value after testing.

Can the mold remain assembled during cleaning?

Yes. The machine supports cleaning without mold disassembly and without stopping production.

Related Product and Application Resources

Review Product information and machine models.

Explore Mold waterway cleaning solutions and application resources.