• PT Youtube
  • PT Facebook
  • PT Linkedin
  • PT Twitter
2/23/2018 | 1 MINUTE READ

New Physical Foaming Process for Injection Molding

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Linde will introduce a new physical foaming process for injection molding and show off CO2-based gas-assist and mold-cooling technologies.

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

At the NPE2018, Linde LLC  is introducingPlastinum foam injection molding, described as a less expensive, more flexible process for lightweighting molded plastic parts than currently available foaming processes. This physical foaming process is particularly suitable for automotive, white-goods, and medical parts manufacturers who are using conventional injection machines and are looking for an alternative to existing chemical and physical foaming methods.  

In the Plastinum foam injection process, plastic pellets are impregnated with carbon dioxide (CO2) in Linde’s new equipment prior to the injection molding machine. This system allows for physical foaming in conventional injection machines without retrofitting for foam, other than adding a shutoff nozzle. What distinguishes this approach from other processes is that pellets are impregnated with gas in a pressurized autoclave and then transported to the machine hopper, which is not pressurized. Thus one autoclave can feed two machines or be moved on a cart from machine to machine. Gas is said to remain in the pellets for 4 to 6 hr at ambient conditions.

In addition to its new foam technology, Linde is also featuring its Plastinum portfolio of CO2 gas technologies including the enhanced gas-assist injection molding (eGAIM) system; spot-cooling technology for injection molds; and inert gas-metering equipment. Also featured is Linde’s automated Cryoclean “CO2 snow” cleaning technology.

Linde’s Plastinum GAIM C (also known as Enhanced Gas Assist Injection Molding - eGAIM) system will be demonstrated at the Yizumi-HPM Corporation booth (W3343) during NPE2018. The eGAIM system can reduce cycle times up to 35 percent compared to nitrogen systems. The patented Plastinum GAIM C system reportedly also produces better surface characteristics and enables more consistent part quality.

Linde also will feature a spot mold cooling demonstration unit at its booth. The Plastinum Temp S-CO2 spot cooling technology is used to internally cool cores as small as 0.025 in. in diameter. It distributes cooling to difficult-to-reach parts, decreasing cycle time up to 50 percent while maintaining or improving part quality, Linde says. It can also be used to eliminate sink marks on Class A surfaces.  

Hand holding a crystal ball

We’d rather send you $15 than rely on our crystal ball…

It’s Capital Spending Survey season and the manufacturing industry is counting on you to participate! Odds are that you received our 5-minute Plastics survey from Plastics Technology in your mail or email. Fill it out and we’ll email you $15 to exchange for your choice of gift card or charitable donation. Are you in the U.S. and not sure you received the survey? Contact us to access it.

Help us inform the industry and everybody benefits.

RELATED CONTENT

  • Measuring the Magic Of Turbulent-Flow Mold Cooling

    For decades molding experts have talked about the importance of achieving turbulent flow in mold-cooling circuits. But what is it about turbulence that makes it so important? What can be measured and demonstrated to have some tangible value to molders? Several months ago, the author’s firm began looking for answers.

  • How to Reduce Sinks

    Modifications to the common core pin can be a simple solution, but don’t expect all resins to behave the same. Gas assist is also worth a try.

  • EXTRUSION: Cooling: The Critical Function in Extrusion

    Figuring out how much cooling your process needs is complicated. But there are ways to approximate.

NPE2018 Exhibitor

Linde LLC

Booth: S24207

View Showroom

Resources