Plastic mold design tip -How the collapsible cores/collapsible mini cores increase your profit?

Collapsible cores are suitable for multi-cavity molds, large quantity and long term production parts. For markets of Medical, Caps and closures, plumbing which need unscrewing, has undercut (boss detail, seal ring, TE cap, CT cap, Threaded collar, Prescription Dosing, Long thread run) etc.

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Collapsible cores can help

  • Mold makers:

No need complicated gear system, no hydraulics, simplified mold,

Smaller mold with higher density cavity

More balanced mold

 

  • Injection producers:

Smaller force,

Faster cycle time,

Less maintenance,

Improved part quality

 

  • Product designers:

Less secondary operations,

Better design for part,

Thinner material (wall)

 

The collapsible cores are consisted by collapsible core, center pin, and collapse sleeve.

Collapsible core and collapsible mini cores

The collapsible core is mounted in the ejector retainer plate; the center pin is mounted in a bottom clamp plate. An extended stripper plate has been incorporated for proper ejection and cylinders are shown installed for the last stage of the required two-stage ejection. Also, vital to the design is the usage of guided ejection.

The molding sequence can easily be followed by starting with the opening of the press: the press opens and the mold parts at the main parting line. When sufficient mold open is achieved, the ejector plate assembly is moved forward by mechanical or hydraulic knockouts of the press. The ejector plate assembly with the collapsing core is moving forward the necessary stroke required to move the core off of the center pin and collapse the core (this is the first stage of ejection).

 

How the collapsible cores increase your profit?

You can get: simplified, smaller molds, faster cycle time, less maintenance, no hydraulics, smaller force, less secondary operations, lower cost, higher profit. Improved part quality (light weight in some cases), can be used in dustless workshop.

 

Taiyou offers standard and custom collapsible cores fabricating service. It is an ISO9001:2015 certificated mold and die component manufacturer, which offers to worldwide plastic mold makers or component distributors.  Contact us for your next collapsible cores project: sales(at)taiyouprecision.com . www.taiyouprecision.com

Check the CMM dimension inspection result below for the collapsible mini cores:

CMM inspection of Collapsible Mini Cores

Tags:  Collapsible Cores, Collapsible Mini Cores, mold components, undercut, unscrewing, mold design

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