Quality requirements for compressed air for injection molding machines and solutions for Granklin air compressors

1. The core quality requirements of injection molding machines for compressed air

1. Low or no oil demand

• Industry sensitivity: When injection molding machines are used to produce food packaging, medical equipment, high-precision electronic components and other products, oil in the compressed air may cause product pollution and affect safety and compliance.
• standard basis: According to ISO 8573-1 standard, the injection molding industry usually requires compressed air oil content to reachLevel 1 standard (≤0.01 mg/m³), some high-end applications need to be close toGrade 0 (oil-free)。
• risk control: Oil may block pneumatic valves, corrode metal parts, and even cause product surface defects, increasing the rejection rate.

2. dryness requirements

• moisture control: Moisture in compressed air will form bubbles, causing surface defects (such as crazing, shrinkage holes) of injection molded parts and accelerating equipment corrosion.
• national standards:”GB/T 13277.1-2023″ stipulates that the dew point temperature of compressed air used for injection molding machines must be ≤-40℃(Water vapor content ≤127.34 ppmv) to ensure extreme dryness.
• process affects: Moisture may also affect the fluidity of the plastic melt, resulting in uneven filling or size deviations.

3. Particulate matter and cleanliness

• Impurity prevention and control: Impurities such as dust and metal particles in the compressed air may scratch the mold, block the nozzle, or even mix into the plastic to form flaws.
• standard requirements: ISO 8573-1 classifies particulate matter strictly, injection molding machines usually need to meet the requirements ofLevel 1 (particles with diameter ≥0.1μm ≤20,000 pieces/m³)。
• equipment protection: Clean compressed air extends the life of pneumatic components and reduces maintenance frequency.

4. pressure stability

• process requirements: The injection molding machine needs to stabilize the air pressure to control the melt injection speed and pressure. Pressure fluctuations may cause product size deviation or flash.
• control precision: High-quality air compressors need to achieve pressure fluctuations ≤±0.02MPaEnsure consistency in the injection molding process.
• Energy efficiency correlation: Stabilizing the pressure can avoid frequent start and stop of air compressors and reduce energy consumption.

2. Technical advantages of Granklin water-lubricated oilless air compressor

1. Zero oil pollution design

• Water lubrication technology: Adopt a single screw and star wheel structure, and replace traditional lubricating oil with water to completely prevent oil from entering compressed air.
• quality assurance: The oil content of the discharged gas approaches to0 mg/m³, combined with post-processing, can be directly used for highly sensitive injection molding scenes.

2. Post-processing configurationEfficient filtration and drying system

• Five-level filtration：
  • Pre-filtration (5μm) → activated carbon filtration (peculiar smell) → bacterial filtration (0.01μm) → dryer (dew point-40℃) → terminal filtration.
• drying performance: Ensure that the compressed air dew point temperature is ≤ ≤-40℃, far exceeding industry standards.
• microbial control: The bacterial filtration unit effectively blocks microorganisms and ensures a sterile production environment.

3. Stable gas supply and intelligent control

• constant voltage technology: Adopt frequency conversion regulation and Internet of Things monitoring to achieve pressure fluctuations ≤±0.01MPa, accurately match the needs of injection molding machines.
• energy-saving advantages: Permanent magnet frequency conversion technology automatically adjusts the speed according to the air consumption, reducing energy consumption by 15%-20%, and the long-term use cost is lower.
• remote management: Built-in IoT system to monitor pressure, temperature, humidity and other parameters in real time, and support remote fault diagnosis and parameter adjustment.

4. low maintenance

• Oil-free design: Eliminate the replacement of consumables such as oil filters and oil dispensers, and reduce annual maintenance costs by more than 30%.

3. The practical application value of Granklin air compressor in the injection molding industry

1. product quality improvement

• Zero oil pollution: Avoid surface defects or performance degradation of plastic parts caused by oil content and improve the yield.
• Dry guarantee: Stable and dry compressed air ensures uniform filling of the melt and reduces defects such as shrinkage cavities and bubbles.
• Cleaner Production: Low-particulate air protects molds and nozzles, extending equipment life.

2. Compliance and security

• industry certification: Comply with ISO 8573-1, GB/T 13277.1 and other domestic and foreign standards, helping enterprises pass certification in food, medical and other industries.
• risk prevention and control: Oil-free design eliminates fire hazards, and dry air avoids short circuits in electrical components and ensures production safety.
• Environmental Protection and energy saving: The water lubrication system has no oil emissions and meets the goals of green manufacturing and carbon neutrality.

3. Long-term cost-effectiveness

• energy consumption is reduced by: The combination of frequency conversion technology and high-efficiency motors saves energy by 15%-20% compared with traditional air compressors.
• Simplified maintenance: Eliminate oil system maintenance, reduce downtime, and improve equipment utilization.
• return on investment: Although the initial cost is slightly higher, the long-term operating cost is low, and the comprehensive cost advantage is significant.

IV. Summary

Injection molding machines have extremely strict quality requirements for compressed air, involving core indicators such as low oil/no oil, extreme dryness, high cleanliness and pressure stability. Granklin water-lubricated oilless air compressors perfectly meet these needs through innovative water lubrication technology and intelligent control, while providing long-term value of low maintenance, long life and high energy efficiency. Choosing Granklin air compressor is not only about choosing high-quality compressed air, but also about choosing reliable, safe and environmentally friendly production solutions.