Sheet Extrusion & In-Line Thermoforming Process

| Barrel Temperature |
|
|
| Feed Zone |
°F* |
400-420 |
| Compression Zone |
°F |
410-430 |
| Metering Zone |
°F |
430-450 |
| Adapter and Screen Changer |
°F |
430-440 |
| Die Temperature |
°F |
450-480 |
| Melt Temperature |
°F |
440-475 |
| Chill Rolls |
|
|
| Top (T) |
°F |
150-160 |
| Center (C) |
°F |
160-175 |
| Bottom (B) |
°F |
140-150 |
| Thermoforming |
|
|
| Top Heater |
°F |
400-430 |
| Bottom Heater |
°F |
400-435 |
| Forming Temperature |
°F |
300-310 |
* To convert temperature from Fahrenheit to Celsius (Temp°F-32)/1.8 = Temp°C
Injection Molding Process
| Melt Temperature |
°F |
450-460 |
| Nozzle |
°F |
440-450 |
| Adapter |
°F |
450-460 |
| Front |
°F |
450-470 |
| Middle |
°F |
440-460 |
| Rear |
°F |
430-450 |
| Hot Runner/Manifold Temperature |
°F |
380-420 |
| First or Boost Stage Injection |
|
|
| Time |
sec |
5-10 (less for smaller parts) |
| Pressure |
psi |
1,200-2.000 (max) |
| Fill Speed: |
|
|
| First 10% of Shot |
in/sec |
1.5 |
| Next 70% of Shot |
in/sec |
2.3 |
| Last 20% of Shot |
in/sec |
1.2 |
| Packing Stage Time |
sec |
4-8 |
| Second or Hold Stage Injection |
|
|
| Time (with a packing stage) |
sec |
6-11 |
| Time (without a packing stage) |
sec |
9-15 |
| Pressure |
psi |
60% of max inj. pressure |
| Cushion |
in |
0.25-0.50 (dependent on shot size) |
| Screw Speed |
rpm |
60-100 |
| Back Pressure |
psi |
50-200 |
| Mold Temperature |
°F |
70-120 (actual surface pyrometer reading) |
| Clamp Pressure |
tons/in2 |
2.2 (a) |
| Drying Conditions |
|
usually not required |
| Purging |
|
Polyethylene (PE), polypropylene (PP) or standard purging compund |
(a) 2.2 tons/in2
of projected mold area. This is dependant on wall thickness, flow distance and flow direction changes.
Before using this product, the user is advised and cautioned to make its own determination and assessment of the safety and suitability of the product for the specific use in question and is further advised against relying on the information contained herein as it may relate to any specific use or application. It is the ultimate responsibility of the user to ensure that the product is suited and the information is applicable to the user’s specific application.
ConocoPhillips Company does not make, and expressly disclaims, all warranties, including warranties of merchantability or fitness for a particular purpose, regardless of whether oral or written, express or implied, or allegedly arising from any usage of any trade or from any course of dealing in connection with the use of the information contained herein or the product itself. The user expressly assumes all risk and liability, whether based in contract, tort or otherwise, in connection with the use of the information contained herein or the product itself. Further, information contained herein is given without reverence to any intellectual property issues, as well as federal, state or local laws which may be encountered in the use thereof. Such questions should be investigated by the user.