Mold nitrogen gas springs are innovative elastic components that rely on high-pressure nitrogen gas for their operation. These springs boast compact dimensions, high force capacity, extended stroke lengths, and smooth operation. They simplify mold design, installation, and adjustment while ensuring product quality and extended lifespan. As nitrogen gas springs are employed over time, the need to replace their gas arises. Here, we’ll delve into essential considerations when undergoing gas replacement for these springs.

Conditions and Timing for Gas Replacement

Due to factors like temperature variations, pressure fluctuations, and load changes, the nitrogen gas within these springs can gradually diminish or leak. To maintain their optimal performance, periodic inspections and gas replacements are necessary. Several situations warrant gas replacement:

• When the actual stroke of the nitrogen gas spring is less than 10% of the designed stroke.
• If the actual force exerted by the spring is less than 10% of the intended force.
• When abnormal noises, vibrations, or temperature rises are observed.
• In the presence of leaks, deformities, or damages.
• When mold adjustments or replacements are required.

Steps and Methods for Gas Replacement

Gas replacement is a specialized procedure that demands specific tools and equipment. Follow these steps meticulously:

1. Stop Operations and Secure the Mold: Cease mold operations and position it securely.
2. Extend the Piston Rod: Extend the piston rod fully and secure it in place.
3. Vent the Old Gas: Use a dedicated venting needle to release the old gas within the nitrogen gas spring. Avoid direct exposure to high-pressure gas.
4. Fill with Dry Nitrogen: Attach a specialized inflation needle to a high-pressure, dry nitrogen (N2) source and gradually increase the pressure to the desired level. Adhere to the marked maximum pressure value and avoid rapid inflation.
5. Verify the Gas Quality: Utilize dedicated testing instruments to ensure the newly filled gas meets design requirements and is leak-free.
6. Reinstall and Test: Reinstall the nitrogen gas spring in the mold and perform trial runs and adjustments.

Precautions and Safety Measures

Changing gas in nitrogen gas springs involves high-pressure hazardous materials and necessitates strict adherence to safety protocols. Keep these points in mind:

• Do not perform inflation or venting operations while under load, as it can lead to spring damage or explosions.
• Use only pure, dry nitrogen (N2) gas for inflation. Never introduce flammable, explosive gases, or volatile liquids into the spring, as it can lead to hazardous explosions.
• Inflation should stay within the pressure range specified in the manual, typically between 3.4 MPa to 15 MPa (at 20 degrees Celsius). Exceeding this range can degrade or damage the spring’s performance.
• Always inflate while the piston rod is fully exposed. If not, begin with a pressure of 0.5 MPa until the piston rod is fully visible before further pressurizing.
• Utilize specialized tools and equipment for gas replacement. Avoid using improper tools that could damage the spring or pose hazards.
• Gas replacement should only be carried out under the guidance and supervision of professionals. Do not attempt self-operating or parameter modifications.
• Perform gas replacement in well-ventilated areas. Avoid confined or combustible environments.
• Wear appropriate protective gear such as goggles, gloves, and masks to prevent injuries from high-pressure gas.
• When venting, ensure that all nitrogen gas is fully released before disposal. Properly dispose of discarded nitrogen gas springs in accordance with relevant regulations.

In conclusion, thorough gas replacement for mold nitrogen gas springs requires careful attention to detail and safety. Adhering to recommended protocols safeguards optimal performance and extends their lifespan. For more information and quality mold components, including nitrogen gas springs, please contact us. Our company is committed to integrity, practicality, quality, and service, and we cater to both new and existing clients. We specialize in a range of industrial springs, offering solutions that elevate your success.