arm thai roto profit 2010
TRANSCRIPT
-
8/6/2019 ARM Thai Roto Profit 2010
1/39
Presented by: Gary Lategan
ARM Thai 2010Technical Seminar
Roto Profit!Roto Profit!
-
8/6/2019 ARM Thai Roto Profit 2010
2/39
Additives
Impact
Modifier
UV
Internal
release
Thermal
Stability
A2A1
The Rotomoulding Process
Polymer
Type
MFI
Grind
Particle size
ShapeShot Weight
P1 P2 P3
Moulds
Type
Thickness
Position
Rotation
SpeedsShielding
Air Movers
M1 M2 M3
Heating
Burner
Air Flow
Transfer
Distribution
MFI
PIAT
H1 H2
Cooling
Fast
Even
Cooling
Remove
InsertsHot
Demoulding
C1 C2 C3
Post Moulding
Storing
Jigging
Machining
Colour
TestingAssembly
J1 J1 J1
Moulded Part
-
8/6/2019 ARM Thai Roto Profit 2010
3/39
Why do we need todo testing?
Because it will help you!Make a quality partAnd
SAVE Money
-
8/6/2019 ARM Thai Roto Profit 2010
4/39
Material Specification SheetUV or NON UV Stabilisation
PIAT
-
8/6/2019 ARM Thai Roto Profit 2010
5/39
ARMO Dry Flow Funnel Test
Flow TestBulk Density Test
-
8/6/2019 ARM Thai Roto Profit 2010
6/39
Grind Quality
Sieve screen AnalysisParticle size
Particle size distribution
Particle shape
-
8/6/2019 ARM Thai Roto Profit 2010
7/39
Colour TestingPigment Test - Dry Blend
Colour Dispersion -Compound
Colour Match After 24hours
Light Box or Torch Test
-
8/6/2019 ARM Thai Roto Profit 2010
8/39
Compound Material
What pigment and What %Check for light penetration
And colour dispersion
-
8/6/2019 ARM Thai Roto Profit 2010
9/39
Visual Test
Inside Surface
Outside SurfaceSection view or
shaving
-
8/6/2019 ARM Thai Roto Profit 2010
10/39
Measure, Control & Improve
Drop Dart TestsMinus 40 Freezer
Temperature Monitoring
-
8/6/2019 ARM Thai Roto Profit 2010
11/39
Measure, Control & Improve
SmellShrinkageWarpage
-
8/6/2019 ARM Thai Roto Profit 2010
12/39
Other important checks
Vent TubeParting line
Release AgentCheck &
Calibrate Scale
-
8/6/2019 ARM Thai Roto Profit 2010
13/39
The right mould
Type of material
And Thickness
Frame
Clamps
Rotation Speeds
-
8/6/2019 ARM Thai Roto Profit 2010
14/39
The right mould
Position on the spider
Method of attaching
Quick release the mould
Hinges, Hinges, Hinges
-
8/6/2019 ARM Thai Roto Profit 2010
15/39
-
8/6/2019 ARM Thai Roto Profit 2010
16/39
How many moulds on a frame
What is the weight of the polymerVs
Weight of the mould, frame and arm
Are we heating polymer or metal!
The right mould
-
8/6/2019 ARM Thai Roto Profit 2010
17/39
Type of mould
Mould wall thickness
Inserts & Parting Line
Release Agent - Internal
The right mould
-
8/6/2019 ARM Thai Roto Profit 2010
18/39
The right mould
Selection of mould for product
Mould design
Mould clamping
Mould positioning
Type of mould to use
-
8/6/2019 ARM Thai Roto Profit 2010
19/39
The right machine
In my opinion it must be
3 station
Now what is it you wish to mould?
Carousel or
Rock and Roll Oven
-
8/6/2019 ARM Thai Roto Profit 2010
20/39
The right machine
Other important features!
Temperature Control
Pressure or Internal Cooling
Try to work without platforms
-
8/6/2019 ARM Thai Roto Profit 2010
21/39
So what have you done differently!
Today
Last week
Last year
Or are you happy to continue doingit the same for the rest of your life!
-
8/6/2019 ARM Thai Roto Profit 2010
22/39
Temperature
Monitoring and Control
Gives you the freedom to:
Experiment every cycle!
Make Real Time adjustment!
Control Multiple skin and Foaming!Mould New Materials
-
8/6/2019 ARM Thai Roto Profit 2010
23/39
Internal air temperature
0
50
100
150
200
250
0 10 20 30 40 50 60
time (min)
tem
perat
ure(deg
C)
The DNA of Rotational Moulding
Internal air temperature
392oF
212oF
C
A
BD
E
PIAT (Peak Internal Air Temperature)
Roy CrawfordUniversity of WaikatoRoy Crawford
University of Waikato
-
8/6/2019 ARM Thai Roto Profit 2010
24/39
More important, how can we
CONTROLand IMPROVE
what we have MEASURED!To
Improve bottom line profit!
-
8/6/2019 ARM Thai Roto Profit 2010
25/39
0
50
100
150
200
250
300
350
0 5 10 15 20 25 30 35 40 45
Moulding Cycle Time (mins)
Temperatu
re(C)
INTERNAL AIR TEMPERATURE
OVEN TEMPERATURE
OVEN TIME COOLING TIME
392oF
212oF
572oF
350 650375
The Heating Cycle
-
8/6/2019 ARM Thai Roto Profit 2010
26/39
Measure, Control & ImproveThe ideal Burner Performance
High Flame Low FlameThe oven fan speed
Direction of flow shot blast the mouldThe rate at which the mould is heated
NOT the oven
-
8/6/2019 ARM Thai Roto Profit 2010
27/39
Measure, Control & Improve
The correct oven temperatureWhen to stop to thicken upRotation Ratios & Speeds
Achieve optimum PIAT every cycle
-
8/6/2019 ARM Thai Roto Profit 2010
28/39
Internal air temperature
0
50
100
150
200
250
0 10 20 30 40 50 60
time (min)
tem
perature(deg
C)
392oF
212oF
C
A
B
D
E
PIAT (Peak Internal Air Temperature)
The Heating Cycle
This slope should NOT have
a double slope
Build-up rate of plastic should
be about 1mm/minEnd of powder pool.
Heating rate should beabout 30oC/min
-
8/6/2019 ARM Thai Roto Profit 2010
29/39
-
8/6/2019 ARM Thai Roto Profit 2010
30/39
The cooling ratehas a major effect on the mechanicalproperties of the moulded part and
the cycle time!And yet it is the
least controlled phaseof the process !!
The Cooling Cycle
-
8/6/2019 ARM Thai Roto Profit 2010
31/39
0
50
100
150
200
250
300
350
0 5 10 15 20 25 30 35 40 45
Moulding Cycle Time (mins)
Temperature(C)
INTERNAL AIR TEMPERATURE
OVEN TEMPERATURE
OVEN TIME COOLING TIME
392oF
212oF
572oF
850 920 935
The Cooling Cycle
In the cooling stage you create the
structure in the part
-
8/6/2019 ARM Thai Roto Profit 2010
32/39
Measure, Control & Improve
Cool as fast and as even as possiblePosition fans for even cooling
Demould at correct temperature
-
8/6/2019 ARM Thai Roto Profit 2010
33/39
Internal air temperature
0
50
100
150
200
250
0 10 20 30 40 50 60
time (min)
tem
pera
ture(deg
C)
392oF
212oF
C
A
B
D
E
PIAT (Peak Internal Air Temperature)
The Cooling CycleCooling rate should be
about 20oC/min
-
8/6/2019 ARM Thai Roto Profit 2010
34/39
-
8/6/2019 ARM Thai Roto Profit 2010
35/39
Benefits of Temperature Control?Benefits of Temperature Control?
Consistent quality!Consistent quality!
Reduced Scrap!Reduced Scrap!
Improved Output!Improved Output!
Increased Profit!Increased Profit!
-
8/6/2019 ARM Thai Roto Profit 2010
36/39
Moulding with
TEMPERATUREis the
FUTURE!
-
8/6/2019 ARM Thai Roto Profit 2010
37/39
-
8/6/2019 ARM Thai Roto Profit 2010
38/39
TempLoggerTempLoggerTemperature Monitoring and ControlTemperature Monitoring and Control
For more info please contact me
Gary Lategan+27 82 8883180
or visit our website for downloads!
www.rotosolutions.co.za
For more info please contact me
Gary Lategan+27 82 8883180
or visit our website for downloads!
www.rotosolutions.co.za
-
8/6/2019 ARM Thai Roto Profit 2010
39/39
Thanks toSCG & Comos
&Thanks for your attention!
Thanks toSCG & Comos
&Thanks for your attention!
TempLoggerTempLoggerTemperature Monitoring and ControlTemperature Monitoring and Control