UNILIFTER ® UNDERCUT RELEASING SYSTEM UniLifter ® Design Guidelines
Design Guidelines 1. General Installation
It is recommended that lifters be installed as shown in Fig. 1 , with T-Gib mounted to top of ejector plate. The appropriate X and Y dimensions are as follows (min. Y dimension prevents mounting screws from interfering with U-Coupling travel):
Y MIN.
Y MIN.
SERIES
X
SERIES
X
.250 .500
.469 .406
.78 .37
1.000
.375
71
10
12mm 11mm
2. Angles Designs using angles from 5 to 10 degrees will typically yield the best results. Angles up to 15 degrees are permissible by using lifter guides in the bottom of the support plate. (Lifter guides to be made by moldmaker). 3. Lifter Guides Lifter guides are recommended for designs with angles of 15 degrees (see 2 above) or whenever less than half of the core blade is bearing in the core insert. 4. Guided Ejection It is recommended that guided ejection be used in all designs. 5. Fit and Finish Recommended clearance for core blade is .001−.0015" (.025−.038 mm) where permissible. Although standard core blades are approximately 10 Rc above P-20 and 10 Rc below hardened tool steel, additional performance can be obtained by treating after finish machining (TiN coating, chrome flash, etc). 6. Locking Angles Locking angles (see Fig. 2 ) may be designed in if required to provide a locking surface to counter against molding pressure. 7. Non-Standard Shapes/Materials L-shaped core blades as shown in Fig. 3 may be machined by removing stock from thicker core blades. Material from the heel area should not be removed. The bearing dimension T-1 should be on the same center as radius R .
CLEARANCE POCKET FOR U-COUPLING
X
TO RADIUS CENTER
Y MIN.
Fig. 1
T AS SUPPLIED
D-M-E SUB COVER DESCRIPTION OF CONTENTS DME VECTORFORM LIFTER SYSTEMS TAKING LIFTER SYSTEMS TO THE NEXT LEVEL Overview ...................................................66-68 Design Guidelines.......................................... 69 Advanced Applications.............................70-71 Component Specifications.......................72-75 Ordering Information .................................... 76 Dual Rod Design Benefits.........................77-78 Table of Contents
BACK ANGLE
LOCKING SURFACE
ANGLE
T1
ANGLE
FRONT ANGLE
HEEL AREA
L-shaped core blades, or blades made from other materials can also be supplied on special order. Contact DME for details.
R
FIGURE 2
FIGURE 3 Fig. 3
Fig. 2
64
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ www.dme.net ■ store.dme.net
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