Slide Products Monthly Sticky Situations Enewsletter

Are You Taking the Time to Start Up Properly?

Safely Starting Up Your Plant

When customers come to us with production issues, we often ask about their startup operations. While often overlooked, the steps a plant takes to activate an injection molding machine plays a large role in production time, mold life and overall efficiency. Lots of time is spent perfecting the molding process, so why not invest the same amount of thought on creating a supportive startup procedure?

Just like shutting down, your plant’s startup method has the ability to make your molding process safer and more efficient. It is important to have a plan that is specific to your plant’s operations and performed routinely every time. This added effort will help to eliminate part defects and minimize downtime in your plastics processing.

The key is preparation

Clean startups are a direct response to careful planning including a proper shutdown. By incorporating standardized procedures in your shutdown, you improve the capability of smooth starts. So, what are some other ways you can prepare prior to the startup event?

Prior to starting up your equipment, it is vital to check that all lines (power, hydraulic, water and oil) are connected and routed properly. Because these machines produce high temperatures and pressures, any out of place component can cause devastating issues. Additionally, confirm that safety guards are in place and that all staff has the appropriate personal protection equipment to decrease the risk of injury.

While not all startup procedures are the same, below are some recommended steps to get equipment up and running smoothly.

  1. Clean the molds with a mold cleaner or mold polish to remove signs of rust preventive sprays, oxidation, staining and other contamination.
  2. Add grease to ejector pins and plates to help prevent galling, seizing and pitting, and to provide maximum lubricity without part marking. Slide recommends a two-part process using both Super Grease on the back 90% of the pin and Heavy-Duty 10% Mold Release on the remaining portion. Super Grease aerosol can be used on the ejector plate for additional lubrication.
  3. Configure the mold in the machine and heat it to its operating temperature levels.
  4. Purge the barrel and screw to remove unwanted resin with the help of a purging compound.
  5. Start the run and slowly increase to the desired speed to begin the molding process.
  6. Keep an eye out for issues when removing parts from the mold and apply mold release formula as necessary.

Following a standardized startup procedure similar to the one above will allow you to maximize your molding process without sacrificing quality or safety. When doing this, consistency in your method is essential. As always, here at Slide we hope to share our knowledge to boost your plastics processing efficiency and profitability one newsletter at a time.

Our customers know they can count on Slide to troubleshoot issues that can affect productivity, including the problems that can be associated with plant shutdowns and startups. For support like that which Slide has been providing our customers for nearly 70 years, contact your local Slide distributor, call us at 1‑800‑323‑6433, email us, or visit our website at

Best Practices for Shutdown & Startup

Slide Startup Procedure Post

Establishing a shutdown and startup protocol based on industry best practices will keep the safety of both staff and equipment at the forefront while saving you time and money. Read More...