make the tooling changeover to concept extru-tech limited extrusion tooling technology concept...
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MAKE THE TOOLING CHANGEOVER TO
CONCEPT EXTRU-TECH LIMITEDEXTRUSION TOOLING TECHNOLOGY
CONCEPT EXTRU-TECH LIMITED
TEL: 44 (0)121 520 8252
QUALITY THE KEY TO SUCCESS
CONCEPT SHEATHING, STRIPING & SKINNING CROSSHEADS
CONCEPT
TORPEDO SPIDERS
CONCEPT EXTRU-TECH LTD. UK’s NO.1 HI-TECH MULTI-LAYER DIE MANUFACTURERS.
CET 125 3-LAYER TUBE HEAD
MULTI-PURPOSE TUBE DIE HEAD. FOR SINGLE LAYER TUBE WITH OR WITHOUT STRIPES. FOR TWIN LAYER TUBE WITH OR WITHOUT STRIPES. FOR THREE LAYER TUBE WITH OR WITHOUT STRIPES. CONVERSION TO CROSSHEAD FOR CONDUCTOR OR ROPE
OPTIONAL. DESIGNED TO MEET CUSTOMERS’ SPECIFIC REQUIREMENTS. DESIGNED WITH LATEST SPIRALCAD FLOW SIMULATION
SOFTWARE TO GIVE OPTIMUM OUTPUT AND MATCH MATERIAL RHEOLOGY.
CONCEPT CONCEPT SHEATHINGSHEATHING CROSSHEADCROSSHEAD
40 MM 40 MM TO 75 MMTO 75 MM
STATE OF THE ART STATE OF THE ART TECHNOLOGYTECHNOLOGY
CONCEPTBREAKER PLATES
NO JOB TOO SMALL
TO SCALE - SEE MOBILE PHONE
FLOWPATH FOR CREATIVE 150 SHEATHING & STRIPING
CROSSHEAD
Concept Extru-Tech
DESIGN AND MANUFACTURE CROSSHEADS AND DIES TO
MATCH:PRODUCTION OUTPUT
MATERIAL RHEOLOGY
CET USE COMPUPLAST TECHNOLOGY TO OPTIMISE THE FLOW
OF MELT THROUGH THE DIE
Side Fed DiesSide Fed Dies
The center The center mandrel is mandrel is supported below supported below the entry point the entry point of the material.of the material.
Polymer enters Polymer enters from the side from the side and flows around and flows around the center the center mandrel.mandrel.
Inlet
Exit Land
Body
Mandrel Extension
Mandrel Adapter
Inflation Air
Balancing of flow is Balancing of flow is required to ensure required to ensure
uniform distributionuniform distribution
Material will prefer to take Material will prefer to take the shortest path from the the shortest path from the entrance to the exit.entrance to the exit.
This will result in more This will result in more material flowing along the material flowing along the inlet side.inlet side.
Side Fed Die
Inlet
Outlet
Through Hole
Unwrapped Side Fed Unwrapped Side Fed DieDie
Inlet
Channel
Restriction
Chamber
Outlet
Path ComparisonPath Comparison
Inlet
P1 P2For uniform flow Q1 Q2
Side Fed DieSide Fed DiePotential ProblemsPotential Problems
Weld Line
Thick
Thin
Thickness Variation, Period = 2
SPIRAL MANDREL TECHNOLOGY FOR 3 LAYER
PETROLEUM PIPE
Spiral Mandrel DiesSpiral Mandrel Dies
Commonly used Commonly used for tubular for tubular (blown) film (blown) film production production since 1950’s.since 1950’s.
In more recent In more recent years applied to years applied to pipe and blow pipe and blow molding diesmolding dies
Spiral Mandrel Die & Spiral Mandrel Die & BodyBody
Spiral Mandrel Flow Spiral Mandrel Flow FieldField
MANDREL BODY
DIE INLET
ENTRY PORT
DIE EXIT
INFLATION AIR
Qin
Qs1Qs1
Qs2Qs2
Qs3Qs3
P1 = P2
Flow Path Flow Path ComparisonComparison
Fully 3-D Flow FieldFully 3-D Flow Field
Weld Line Orientation
Spider Die Spiral Die
Design EvaluationDesign EvaluationFlow DistributionFlow Distribution
Good DesignUniform Thickness
Poor DesignPeriodic ThicknessEqual to # of Spirals
Design EvaluationDesign Evaluation
Circumferential Position
ChannelFlow
Channel Position
Slow Initial Leakage
Fast Initial Leakage
FlowVariation
0 60 120 180 240 300 360
Position [°]
-8
-6 -
4 -2
0
2
4
6
Th
ickn
ess
vari
atio
n [
%]
Run 1 Run 2 Simulation
Spiral Mandrel DieComparison with experiment
Potential ProblemPotential ProblemRapid reduction in channel flow will
result in the remainder of the channel having too little material
flow and consequently a high residence time
If sufficient material leaks out prior to the first spiral overlap, then it is quite likely that this will result in a visual defect in the final product.
A type of Port Line
Design EvaluationDesign EvaluationAdditional CriteriaAdditional Criteria
Final DistributionFinal Distribution Velocity/Shear Rate/Shear StressVelocity/Shear Rate/Shear Stress Pressure DropPressure Drop Sensitivity to Material ChangesSensitivity to Material Changes Sensitivity to Process ConditionsSensitivity to Process Conditions Sensitivity to Manufacturing Sensitivity to Manufacturing
TolerancesTolerances
STACKED DIESSTACKED DIES
•Each layer is added sequentially.
•Each distribution module can have the same surface area.
•All layers (except the inner layer) can have the same residence time.
CONCEPT 150 CROSSHEAD
CONCEPT 150 CROSSHEAD
GENERAL ARRANGEMENT
WALL SHEAR STRESS FIELD
150 CROSSHEADTHE
PROCESS OF SIMULATING
FLOW THROUGH
THE DIE SHOWING
THE SHEAR
STRESS
WALL SHEAR RATE FIELD
150 CROSSHEADTHE PROCESS OF
SIMULATING FLOW
THROUGH THE DIE
SHOWING THE SHEAR RATE
PRESSURE FIELD
150 CROSSHEADTHE PROCESS
OF SIMULATING
FLOW THROUGH THE DIE SHOWING
THE PRESSURE DROP
THROUGH THE DIE
AVERAGE RESIDENCE TIME FIELD
150 CROSSHEADTHE PROCESS OF
SIMULATING FLOW
THROUGH THE DIE SHOWING
THE MATERIAL RESIDENCE
TIME
BULK TEMPERATURE
FIELD
150 CROSSHEADTHE PROCESS OF SIMULATING
FLOW THROUGH THE DIE SHOWING
THE TEMPERATURE
VARIATIONS
CONCEPTCONCEPT
GUIDE PINSGUIDE PINS
CET 420 CALIBRATOR
POLYMER FLOW DISTRIBUTOR
CET HAVE SOLUTIONS
TO YOUR PROBLEMS
PROUD OF A HIGHLY SKILLED WORKFORCE
CET CRAFTMANSHIP
CET EXTRUSION TOOLING
SPIRAL MANDREL INNER DIE
PROVIDING YOU WITH QUALITY TOOLS TO
MANUFACTURE YOUR QUALITY
PRODUCTS