https://www.avient.com/sites/default/files/2020-10/luxury-closures-gravi-tech-design-guide-2.0-application-specific.pdf
Base Resin ABS PA PBT PC PE PEEK PP PPS
Barrel Temperatures °F (°C)
Rear Zone 400–475(200–250)
430–500
(220–260)
480–520
(250–270)
480–570
(250–300)
400–445
(200–230)
660–700
(350–475)
400–440
(200–225)
520–600
(270–300)
Center Zone 410–480(205–253)
440–510
(225–265)
483–522
(252–272)
500–580
(260–305)
410–455
(207–237)
670–710
(357–385)
410–450
(205–230)
550–610
(285–310)
Front Zone 420–490(210–257)
450–520
(230–270)
487–527
(254–274)
515–590
(267–310)
420–465
(213–243)
680–720
(363–400)
420–455
(215–235)
570–620
(300–320)
Nozzle 425–500(215–260)
460–530
(235–275)
490–530
(255–275)
530–600
(275–315)
430–475
(220–250)
700–730
(370–395)
430–460
(220–240)
610–620
(320–325)
Melt Temperature 425–515(215–270)
530–580
(276–300)
500–565
(260–300)
530–615
(275–325)
430–495
(220–260)
700–725
(370–385)
430–475
(220–250)
610–635
(320–335)
Mold Temperature 140–200(60–90)
150–200
(65–90)
140–250
(60–120)
160–240
(70–115)
80–140
(25–60)
300–400
(150–200)
80–140
(25–60)
190–300
(90–150)
Drying Parameters
190 (90)
2–4 Hours
0 .01%–0 .15%
180 (80)
4–5 Hours
0 .10%–0 .20%
275 (135)
3–4 Hours
0 .02%–0 .04%
250 (125)
3–4 Hours
0 .02%
160 (70)
2 Hours
300 (150)
3–4 Hours
0 .10%
160 (70)
2 Hours
280 (135)
2–3 Hours
0 .01%–0 .20%
Nozzle Type General Purpose Nylon or ReverseTaper General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose
Injection Velocity1 2 .0–5 .0 in/sec; 50–125 mm/sec
Injection Pressure 2,000–4,000 psi; 13,000–30,000 kpa
Back Pressure 0–50 psi; 0–350 kpa
Screw Speed 25–75 RPM
Cushion 0 .125"–0 .250"; 3 .175 mm–6 .35 mm
Screw Compression Ratio2 2 .0:1–2 .5:1
Design Guide 7
Base Resin ABS PA PBT PC PE PEEK PP PPS
Barrel Temperatures °F (°C)
Rear Zone 400–475(200–250)
430–500
(220–260)
480–520
(250–270)
480–570
(250–300)
400–445
(200–230)
660–700
(350–475)
400–440
(200–225)
520–600
(270–300)
Center Zone 410–480(205–253)
440–510
(225–265)
483–522
(252–272)
500–580
(260–305)
410–455
(207–237)
670–710
(357–385)
410–450
(205–230)
550–610
(285–310)
Front Zone 420–490(210–257)
450–520
(230–270)
487–527
(254–274)
515–590
(267–310)
420–465
(213–243)
680–720
(363–400)
420–455
(215–235)
570–620
(300–320)
Nozzle 425–500(215–260)
460–530
(235–275)
490–530
(255–275)
530–600
(275–315)
430–475
(220–250)
700–730
(370–395)
430–460
(220–240)
610–620
(320–325)
Melt Temperature 425–515(215–270)
530–580
(276–300)
500–565
(260–300)
530–615
(275–325)
430–495
(220–260)
700–725
(370–385)
430–475
(220–250)
610–635
(320–335)
Mold Temperature 140–200(60–90)
150–200
(65–90)
140–250
(60–120)
160–240
(70–115)
80–140
(25–60)
300–400
(150–200)
80–140
(25–60)
190–300
(90–150)
Drying Parameters
190 (90)
2–4 Hours
0 .01%–0 .15%
180 (80)
4–5 Hours
0 .10%–0 .20%
275 (135)
3–4 Hours
0 .02%–0 .04%
250 (125)
3–4 Hours
0 .02%
160 (70)
2 Hours
300 (150)
3–4 Hours
0 .10%
160 (70)
2 Hours
280 (135)
2–3 Hours
0 .01%–0 .20%
Nozzle Type General Purpose Nylon or ReverseTaper General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose
Injection Velocity1 2 .0–5 .0 in/sec; 50–125 mm/sec
Injection Pressure 2,000–4,000 psi; 13,000–30,000 kpa
Back Pressure 0–50 psi; 0–350 kpa
Screw Speed 25–75 RPM
Cushion 0 .125"–0 .250"; 3 .175 mm–6 .35 mm
Screw Compression Ratio2 2 .0:1–2 .5:1
Comments
1 .
Venting Guidelines by Resin
• PC: .001"– .002" depth & .250" width
• PC/PSU: .002"– .003" depth & .250" width
• PES: .003"– .004" depth & .250" width
• PEI: .001"– .003" depth & .250" width
• PP: .001"– .002" depth & .250" width
• ABS: .0015"– .0025" depth & .250" width
• PEEK: .002"–.004" depth & .250" width
FIGURE 40 - Venting Guidelines
Vent Groove
Vent Land
Vent
FIGURE 44 - Venting guidelines
FIGURE 43 - Venting areas
20 Gravi-Tech
CHAPTER 5 | PROCESS OPTIMIZATION
Process optimization ensures a quality process
and minimizes cycle time.
https://www.avient.com/resources/safety-data-sheets?page=5971
PE CANNABIS NAVY 648C
PE VENOM BLUE 315C
PE KALI MIST 717C
https://www.avient.com/resources/safety-data-sheets?page=1514
PG 70998.00 PEARL SI PE
STUDIO PINK PEARL PE
PG 71074.00 RD PE
https://www.avient.com/resources/safety-data-sheets?page=6343
PG 324260.01 PEARL GD PE
PG 324262.01 GN PE
PE SARATOGA BLUE
https://www.avient.com/resources/safety-data-sheets?page=1194
PE COPPER
LT PLUM PRL 5145C PE
LT PLUM 5145C PE
https://www.avient.com/resources/safety-data-sheets?page=2665
HONDA RED PE
KTM ORANGE PE
PE 152 GRN 1702-2
https://www.avient.com/resources/safety-data-sheets?page=1024
PG 33810 GN PE
PG 33809 GN PE
PG 33812 OR PE
https://www.avient.com/resources/safety-data-sheets?page=4564
DK BLUE PE SC
UV BLUE STREAK PE 2
YELLOW PE
https://www.avient.com/resources/safety-data-sheets?page=1480
PG 69716.00 PEARL GD PE
PE 161 Natural
PE 125 Natural
https://www.avient.com/resources/safety-data-sheets?page=987
PG 31755 GD PE
PG 31693 OR PE
PG 31692 OR PE
