PSU (Polysulphone) |
General Moulding Notes |
- PSU requires a fairly hot gate area - excessive gate excessive gate cooling may cause gate freeze-off.
- Medium-to-large gate diameters are generally required to minimise gate shear.
- Gate vestige is usually neat, typical height 1/3 - 1/2 of gate diameter.
- Filled polymers may require special wear resistant tips - check with factory.
- Melt = 340 - 390oC, Mould = 120 - 160oC, Flow = Stiff, Residence Time = Short, sg = 1.24
|
Step 2: Click on the code for the tip style that you wish to use. |
Code |
Tip Style |
Suitability |
Comments |
Sprue Tips For Gating On Runners |
SS |
Short Sprue |
No |
|
XS |
Extended Sprue |
No |
|
NS |
Nylon Sprue |
Good |
|
NX |
Nylon extended sprue |
Good |
|
Pin Gate Tips For Gating On Parts |
PP |
Pinpoint |
Fair |
Gate area must be kept hot. |
PX |
Pinpoint Extended |
No |
Gate will freeze-off. |
PT |
Pinpoint thru' flow |
No |
Gate will freeze-off. |
EXT |
Extended Hot Pinpoint |
Fair |
Gives minimal gate pip, no witness ring, high pressure drop. |
RG |
Ring Gate |
Good |
Leaves witness ring on part. |
RT |
Ring Gate thru' flow |
No |
Gate will freeze-off. |
CG |
Collar Gate |
Poor |
Prone to gate freeze-off. Gate area must be kept hot. |
CT |
Collar gate thru' flow |
No |
Gate will freeze-off. |
Valve Gate Tips For Gating On Parts |
VP |
Valve pinpoint gate |
No |
Prone to gate freeze-off. |
VR |
Valve ring gate |
Fair |
Leaves witness ring on part. |
VC |
Valve collar gate |
No |
Prone to gate freeze-off. |
Special Gate Tips For Gating On Parts |
MT |
Multi-Tip |
No |
Not Recommended |
TG |
Tunnel Gate |
No |
Not Recommended |
|
Step 3: Choose Your Bush Size |
Maximum shot weight per bush (Grams) |
- Find the bush size that most closely matches your required shot weight with your choice of tip and click on the shot weight to be taken to the technical data for that range.
- If approaching the maximum for a particular bush size, consider using the next larger size, especially if a long bush is required.
- Polymer grade, viscosity, fillers and part dimensions also affect the choice of bush. If in doubt - ask.
- O = This tip / bushing combination is not currently available.
- X = This selection is not recommended.
|
Code |
Sprue Gate Tips |
Micro |
DS |
PLV187 |
PLV250 |
PLV375 |
PLV625 |
SS |
Short Sprue |
X |
X |
X |
X |
X |
X |
XS |
Extended Sprue |
X |
X |
X |
X |
X |
X |
NS |
Nylon Sprue |
O |
20 |
O |
O |
O |
O |
NX |
Nylon Extended Sprue |
15 |
20 |
30 |
100 |
500 |
1000 |
|
Code |
Pin Gate Tips |
Micro |
DG |
PLV187 |
PLV250 |
PLV375 |
PLV625 |
PP |
Pinpoint |
15 |
30 |
O |
O |
O |
O |
PX |
Pinpoint Extended |
X |
X |
O |
O |
O |
O |
PT |
Pinpoint Thru' Flow |
O |
X |
O |
O |
O |
O |
EXT |
Extended Hot Pinpoint |
5 |
O |
O |
O |
O |
O |
RG |
Ring Gate |
O |
O |
X |
100 |
500 |
1000 |
RT |
Ring Gate Thru' Flow |
O |
O |
O |
X |
X |
X |
CG |
Collar Gate |
O |
O |
X |
X |
X |
X |
CT |
Collar Gate Thru' Flow |
O |
O |
O |
X |
X |
X |
|
Code |
Valve Gate Tips |
Micro |
DVG |
LVG187 |
LVG250 |
LVG375 |
LVG625 |
VP |
Valve Gate Pinpoint |
O |
X |
X |
O |
X |
X |
VR |
Valve Ring Gate |
O |
O |
X |
O |
O |
O |
VC |
Valve Collar Gate |
O |
O |
X |
O |
O |
O |
|
Code |
Multi-Tips |
|
MT32D |
MT45D |
|
|
|
MT |
Multi-tip Pinpoint |
|
X |
X |
|
|
|
|
Code |
Tunnel Gate Tips |
|
DT18 |
DT25 |
DT32A |
DT32C |
|
TG |
Tunnel Gate thru' flow |
|
X |
X |
O |
O |
|
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