CO LL APS IB LE MINI -CO RE S RT-Series Mini Collapsible Cores
CO LL APS IB LE COR ES DT Series Collapsible Cores
Easily mold parts with closures as small as 13mm The Collapsible Mini-Core broadens the applications of collapsible core molds for closures as small as 13mm. Due to the smaller diameters involved, these Mini- Cores employ three larger collapsing segments combined with three narrow, non-collapsing blades, which are an integral part of the center pin. As a result, up to 80% full threads or undercuts can be molded. The function of the collapsing core also permits threads to stop at any point along the molded length – threads need not run out to the top of the core as with unscrewing molds. If a seal is required in the top of the closure, an undercut can be molded into the part to hold such a seal in place. The collapsing action also permits a longer threaded area to be formed, without adding to the cycle time or requiring long rack and pinion mechanisms. In addition to threads, other configurations such as dimples, cut-outs or protrusions beyond the capabilities of unscrewing molds can be successfully molded. Three standard sizes of Collapsible Mini-Cores are available, for 13-16, 17-20 and 21-24mm closures. Full technical details on core grinding and stripper plate mold construction are included in the Collapsible Core and Collapsible Mini- Core Design & Assembly Guide – contact DME for a copy.
Patent Pending
Dove Tail Core Advantages • Positive mechanically actuated Collapsible Core • Collapse amount: 5% to 7% per side • Eliminates costly Rack and Gear Systems • Enables faster mold cycle times • Patented Quick Lock (optional) helps cut service time • Built-in center cooling channel • Standard and custom sizes available Simplified Mold Design Maximizes Cost Savings
COLLAPSING SEGMENTS (3) NON-COLLAPSING CENTER PIN BLADES (3)
C
Dove Tail Center Pin
A B
Collapsing Segments
Carrier Assembly DT - Series Cores are no longer available Please see DME S-Series Collapsible Cores Typical thread or under cut details to be released by core
ROOT DIAMETER OF THREAD OR UNDERCUT
UNCOLLAPSED
COLLAPSED
H
MOLDED CAP
Split Ring (Optional Quick Lock Plate)
SHUT-OFF
L
The Collapsible Core DT Series provides a more compact and simplified solution to molding challenging internal undercut features such as o-ring grooves, slots and snap-fit designs. Available in four original standard sizes and in customized sizes, the DT Collapsible Core Series eliminates the need for unscrewing mechanisms. Dove Tail Collapsible Cores Enable Application Design Flexibility • All standard DT Series Collapsible Cores offer 360 degree molding of threads or other undercut features • Molded parts are not required to be closed at one end; they may be partially or completely open • DME offers customized DT Cores with pre-machined part detail • A variety of coatings and treatments are available • For an engineering review, email your part drawing or application to dme_mech_eng@milacron.com
COLLAPSING SEGMENTS (3)
NON-COLLAPSING CENTER PIN BLADES (3)
O.A.L. 5.940in (150.88mm)
STRIPPER INSERT IN STRIPPER PLATE
POSITIVE COLLAPSE SLEEVE (INCLUDED)
CORE SLEEVE WITH (3) COLLAPSING SEGMENTS
CENTER PIN WITH (3) NON-COLLAPSING BLADES EJECTOR PLATE ASSEMBLY
CD
L
SL
120˚ (Typ.)
S
COOLING HOLE IN CENTER PIN
BH
Stroke
C
ALIGNMENT FLATS ON CORE SLEEVE AND CENTER PIN
10˚
D
B
BD
SD
BC
ML
A MAX O.D.
B MIN I.D.
H CENTER PIN DIAMETER (AT TOP OF CORE)
WIDTH OF (3) NON-COLLAPSING CENTER OF PIN BLADES (AT TOP OF CORE)
FOR CLOSURE DIAMETER RANGE
L MAX WORKING LENGTH (INCL MOLD SHUT-OFF)
C COLLAPSE PER SIDE AT TOP OF CORE*
CT
Flats for in-press servicing
60˚ grinding center provided on both ends. (Grind to suit.)
T (3)
ITEM NUMBER
OF THREAD OR CONFIG
OF THREAD OR CONFIG
NOTE: All dimensions and tolerances are in millimeters
MM INCH MM INCH MM INCH MM INCH
MM 4.32 4.83 5.08
INCH .850 .850 1.000
MM INCH
MM 1.32 1.45 1.50
D MINIMUM OUTER DIAMETER
B MINIMUM INNER DIAMETER +3˚/SIDE
ML MAXIMUM MOLDING LENGTH
C MAXIMUM COLLAPSE
CD CARRIER DIAMETER
CT CARRIER
L CORE LENGTH
SL SHAFT LENGTH
SD SHAFT DIAMETER
BD COOLING HOLE DIAMETER
BH DISTANCE TO COOLING HOLE
BC MOUNTING SCREW BOLT CIRCLE
T MOUNTING SCREWS
S MAXIMUM COLLAPSE STROKE
CCM0001 13-16 CCM0002 17-20 CCM0003 21-24
.645 16.38 .425 10.80 .300
7.62
.170 .190 .200
21.59 21.59 25.40
.052 .057 .059
ITEM NUMBER
ASSEMBLY THICKNESS ± 0.05
.805 20.45 .560 14.22 .420 10.67 .965 24.51 .710 18.03 .560 14.22
+0.00 - 0.05
+0.1 - 0.0
+0.00 - 0.02
DT18 DT28 DT38 DT48
21 33 42 54
17 25 33 42
22 28 43 50
1.1 1.6 2.1 2.4
53 60 76 98
21 22 28 37
60 67 85
60 60 60 70
16 20 25 30
6 8
6 8
40 47 60 78
M5 x 25 M5 x 25 M6 x 35 M8 x 40
34 38 54 62
NOTES: 1. Cores listed above include core, center pin, positive collapse sleeve, clamping ring and a special, non-bladed center pin arbor required for proper core grinding. 2. Collapsible Mini-Cores with longer molding lengths, special diameters, collapse or number of segments will be quoted on request. For larger diameters (up to 3.535"), see Collapsible Cores.
*To determine maximum dimension of moldable undercut, reduce the amount of collapse per side shown in the table above by .020 per inch of part height requiring collapse.
10 12
10 12
QL QS1
Shaft Length (SL)
104
Shaft Diameter (SD)
B
6
H
+.01 +.03
92
93
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
QS2
QW
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