mold actions collapsible cores & minicores The RT Series Collapsible Cores are available in sizes to fit most inside detail applications. Whether molding threads or complex details, these cores can simplify design and production. Collapsible Cores allow for smaller molds to run faster cycles with less moving parts. Made from premium tool steels and heat treated using proprietary heat treating methods. Standard diameters range from 13mm to 105mm Mold Closed Part Ejected Cylinders push the stripper plate forward, ejecting the molded part. Mold Open Ejector plate and stripper plate move forward, and the Collapsible Core is collapsed. Progressive can provide Collapsible Cores with details machined complete. Contact Engineering via [email protected] for an application review and quotation. US Patent No. 4,919,608 Canadian Patent No. 1,330,479 MiniCore® is a registered trademark of Roehr Tool Corp.

collapsible cores & minicores Description of Components and Basic Operation Both styles of the Collapsible Cores (Standard and MiniCores®) are three-part assemblies, designed for simplicity of installation, reliability in operation, and long life. The three parts include a Collapsible Core, a Positive Collapse Sleeve, and a Center Pin. Collapsible Core m A-2 Collapsible Core • Designed to collapse independently when the center pin is withdrawn. • The fit between segments is controlled to permit flash-free molding. Positive Collapse Sleeve Positive Collapse Sleeve m 52100 h 54-57 HRC • Designed...

mold actions collapsible cores rt series Center Pin Diameter (At top of Collapsible Core) Maximum Outer Diameter Minimum Inner Diameter catalog number Max. Molded Length (Including Mold Shut-Off) Collapse per Side at Top of Core** (Range Shown) Length of Collapsible Core catalog number For Closure Diameter Range Maximum Outer Diameter Minimum Inner Diameter Center Pin Dia. (At top of Collapsible Core) Width of (3) Non-Collapsing Center Pin Blades (At Top of Core) Max. Molded Length (Including Mold Shut-Off) Collapse per Side at Top of Core

collapsible cores design guidelines Collapsible Core Selection To determine if a standard collapsible core can be used in your application, follow these steps using all dimensions in inches, referring to the charts on page C-16: 1. Determine the Part Major Diameter (A) and find the closest number in the chart column “A” on the following page that is larger than this diameter. Note the Core size(s) referenced. 2. Determine the Part Minor Diameter (B) and find the closest number in the chart column “B” that is smaller than the diameter. If both variables are listed in the same line, this is the...