https://www.avient.com/sites/default/files/2020-08/eccoh-cpr-product-bulletin.pdf
Additional Criteria
• Total heat release (MJ/m²)
• pHRR (kW/m²)
• Time of Ignition (s)
• Smoke production
• Acidity
• Flaming droplets
This example demonstrates the
need to consider the complete
cable design, as using XLPE for the
insulation layer would not give the
required Euroclass.
https://www.avient.com/sites/default/files/2023-10/31307-Certificate-20SEP2023.pdf
Industrial Valle del Cinca S/N Apartado
Barbastro, Huesca E-22300
Spain
Activity: Design and Manufacture of Specialty Engineered Thermoplastics Activity: Design and Manufacture of Specialty Engineered Thermoplastics
Facility: Avient Corporation - Oricain (Pamplona), Spain
Pol.
https://www.avient.com/sites/default/files/resources/PolyOne%2520Proxy%2520Statement%25202016.pdf
The following chart compares cumulative TSR on our common shares against the cumulative total return of the
S&P 500 Index and the S&P Mid Cap Chemicals Index for the five-year period December 31, 2010 to December 31,
2015, assuming in each case a fixed investment of $100 and reinvestment of all dividends.
Our performance has
exceeded the S&P 500 Index as well as the S&P Mid Cap Chemicals Index.
The $1 million
deduction limit generally does not apply to compensation that satisfies Section 162(m)’s requirements for qualified
performance-based compensation.
https://www.avient.com/sites/default/files/2020-10/2020-gravi-tech-design-guide-.pdf
CHAPTER 3 | PART DESIGN GUIDELINES
Wall Thickness (mm)
C
o
o
li
n
g
T
im
e
(
S
e
c
)
40
35
30
25
20
15
10
5
0
0 1 2 3 4
ABS
PC
Nylon 6/6
Figure 2 - Designing for Wall Thickness Changes
Bad
Better
Recommended
Recommended
Poor
High Stress
Ideal
Figure 3 - Internal and External
Radius Guidelines
.5W Min
Inside Rad + W
Poor
High Volume
FIGURE 1 - Wall thickness vs . cooling
time of various plastics
FIGURE 2 - Designing for
wall thickness changes
FIGURE 3 - Internal and external
radius guidelines
Design Guide 9
RIB DESIGN GUIDELINES
The minimum distance ribs should be spaced is
three times the nominal wall thickness (3W) .
This will
FIGURE 43 - Non-Newtonian Fluid Flow
Low Level of Orientation Frozen Layer
Highly Oriented Laminates Gate
Pressure
Transducer A
Pressure
Transducer B
Hydraulic x 10
Filling Hold Start of
mold shrinkage
Time
Pack
P
re
s
s
u
re
A
B
FIGURE 45 - Non-Newtonian fluid flow
Relative Viscosity = Transfer Position * Fill Time
Shear Rate = 1
Fill time
FIGURE 46 - Pressure vs .
End of Fill
Part Length
Dynamic Pressure
Hydrostatic Pressure
P
re
s
s
u
re
Gate End
Part
FIGURE 61 - Deflection Equations
H
F
WLMax Deflection:
0.002" (0.05mm)
1 =
W • H3
12
_______
bending =
F • L3
48 • E • I
_______
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
FIGURE 60 - Pressure vs Part Length
FIGURE 61 - Deflection equations
FIGURE 62 - For Plate Shaped Parts
FIGURE 63 - For Cylindrical Shaped Parts
Design Guide 49
• M
Moldings
= Combined mass of molded parts
• C
p
= Specific Heat of the material
Step 3 – Heat Removal Rate
• N
lines
= The total number of independent cooling
lines there are in the mold
• t
c
= The cooling time required by the part
(Determined in step 1)
Step 4 – Coolant Volumetric Flow Rate
• ΔT
Max,Coolant
= Change in coolant
Temperature During Molding (1°C)
• ρ
Coolant
= Density of coolant
• CP = Specific heat of coolant
Step 5 – Determine Cooling Line Diameter
• ρ
Coolant
= Density of coolant
• V
Coolant
= Volumetric flow rate of coolant
• μ
Coolant
= Viscosity of coolant
• ΔP
line
= Max pressure drop per line
(Usually equals half of the pump capacity)
• L
Line
= Length of the cooling lines
COOLING LINE SPACING
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
4
π
tc =
h2
1n
π2 • a
•
Tmelt – Tcoolant
Teject – Tcoolant
tc =
D2
1.61n
23.1 • a
Tmelt – Tcoolant
Teject – Tcoolant
a =
k
p * Cp
Qmoldings = mmoldings • Cp • Tme • Cplt – Teject
cooling
nlines
moldings
tccooling
Vcoolant
line
nmax, coolant • Pcoolant • Cp, coolant
Dmax =
4 • Pcoolant • Vcoolant
π • µcoolant • 4000
Dmin =
Pcoolant • Lline • V2coolant5
10π • ∆Pline
2D < H
line
< 5D
H
line
< W
line
< 2H
line
FIGURE 70 - Cooling Line Spacing
FIGURE 64 - Heat Transfer Equation
FIGURE 65 - Total Cooling for Mold
FIGURE 66 - Cooling Required by Each Line
FIGURE 68 - Max Diameter Equation
FIGURE 69 - Min Diameter Equation
FIGURE 67 - Volumetric Flow Rate Equation
50 Gravi-Tech
ADHESIVE ADVANTAGES DISADVANTAGES
Cyanoacrylate
Rapid, one-part process
Various viscosities
Can be paired with primers
for polyolefins
Poor strength
Low stress crack resistance
Low chemical resistance
Epoxy
High strength
Compatible with various
substrates
Tough
Requires mixing
Long cure time
Limited pot life
Exothermic
Hot Melt
Solvent-free
High adhesion
Different chemistries for
different substrates
High temp dispensing
Poor high temp performance
Poor metal adhesion
Light Curing Acrylic
Quick curing
One component
Good environmental resistance
Oxygen sensitive
Light source required
Limited curing configurations
Polyurethane
High cohesive strength
Impact and abrasion resistance
Poor high heat
performance
Requires mixing
Silicone
Room temp curing
Good adhesion
Flexible
Performs well in high temps
Low cohesive strength
Limited curing depth
Solvent sensitive
No-Mix Acrylic
Good peel strength
Fast cure
Adhesion to variety
of substrates
Strong odor
Exothermic
Limited cure depth
Design Guide 51
Bibliography
1 .