u/New-Position-1919

I’m curious how other people here feel about collapsible cores in injection molds.

We usually see them used for parts with internal undercuts where a normal core can’t release the part cleanly. In some cases they save space and avoid more complex side actions, but they also seem to bring more concerns about wear, maintenance, and long-term stability.

For people who use collapsible cores often:

• What kind of parts are you mainly using them for?
• Do you think they are worth it compared with sliders or other solutions?
• What problems show up most in production: wear, sticking, flash, cleaning, or something else?
• Any design tips that make them run more reliably?

Would be interested to hear real production experience, especially on cap molds, closures, or other high-volume tools.

For those working with 16+ cavity packaging molds, what usually causes the most trouble for you?

For me it’s usually one of these:

•cavity-to-cavity filling variation

•venting consistency

•gate vestige control

•cooling balance over long production runs

Interested to hear what others run into most often.