VECTORFORM LIFTER SYSTEMS Overview
VECTORFORM LIFTER SYSTEMS Design Guidelines
Mold Base Overview
VectorForm Lifter Overview
Locking Angles
LENGTH OF GUIDE ROD: y = C + Hg + h L' = y /cos K ° L = L' + 2 R
The lifter core (supplied by moldmaker) may be a single-piece component or an assembly of several components including a modified Guide Rod.
LOCKING SURFACE
TOP (STATIONARY) CLAMP PLATE
1
2
“A” (CAVITY) PLATE
FRONT ANGLE
3
“B” (CORE) PLATE
4 5
SUPPORT PLATE
This product is no longer available
R This product is no longer available x Hg
EJECTOR BOX SIDE RAIL
EJECTOR RETAINER PLATE HEIGHT EJECTOR BOX HEIGHT
GP
GUIDE PLATE
A ° + a
y
a = 0.5 MIN
C
C
I
GR
GUIDE ROD
A °
K°
BACK ANGLE
BOTTOM CLAMP PLATE HEIGHT
h
J
6
R
BOTTOM CLAMP PLATE
SB
SLIDE BASE
be modified, additional performance can be obtained by treating after finish machining (TiN coating, flash-chrome, etc.). Component installations can be fitted to suit. • Ensure a loose fit on the Holder Bushing and Guide Plate installation. Ensure a precise fit between the lifter core and the Guide Plate. The Holder Bushing will automatically align prior to bolting the bushing to the clamp plate. • Lubrication is not generally required nor recommended. If lubrication is used, it should be low-viscosity. 6. Locking Angles/Component Back-Up • Locking angles may be designed to provide a locking surface to counter against molding pressure. • A block construction using a square lifter core can also allow the resin pressure to be backed up by the core insert. • If the axial load acting on the lifter core exceeds the limit allowed for the slide base pin (used in JB and UB Slide Bases), use a Standard (SB) Slide Base and back the lifter core on the slide by machining a ledge that is perpendicular to the axis of the lifter core. The lifter core must then seat firmly against the angled face of the Slide Base. 7. Non-Standard Shapes/Materials • Lifter core blocks may be machined to any desired shape and size, provided the chosen number and size of the VectorForm Lifter System core standard components will support the lifter core blocks. Lifter core blocks are to be supplied by the moldmaker.
1. General Installation • It is recommended that the VectorForm Lifter System be installed as shown above. • For each given VectorForm set, all components MUST be of the same size. However, separate sets of different sizes may be installed in the same mold. • Actuation of VectorForm Lifter Systems can be accelerated or decelerated by an inclined sliding surface on the ejector plate and ejector retainer plate. 2. Angles • The VectorForm Lifter System may be used with angles ranging from 5° (minimum) to 30° (maximum). • Deep undercuts in the molded part can be obtained by using a larger angle in the lifter core and by increasing the ejector plate stroke. 3. Lifter Core Guidance • The lifter core must have sufficient guidance in the tool. For multiple lifter cores installed in tandem in the tool, additional guidance in the core inserts is recommended. • If resistance in actuation is great, an additional Guide Plate may be placed directly below the core insert. 4. Guided Ejection • Guided ejection is recommended for all designs. 5. Fit and Finish • Standard component dimensions and Rockwell hardness are provided in the component specifications section of this brochure. Should the standard components need to
7
EJECTOR RETAINER PLATE
HB
8
HOLDER BUSHING
EJECTOR PLATE
VectorForm Lifter Operating Sequence
LIFTER CORE TRAVEL = STROKE x TAN OF ANGLE “A”
A°
STROKE
68
69
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ dme@milacron.com ■ www.dme.net ■ store.dme.net
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ www.dme.net ■ store.dme.net
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