clamping tonnage VS shot weight
| clamping tonnage(T-吨) | shot weight(g-克) | shot weight(oz-盎司) |
| 10 | 7 | 0.24 |
| 20 | 18 | 0.64 |
| 30 | 31 | 1.1 |
| 40 | 48 | 1.7 |
| 50 | 65 | 2.3 |
| 60 | 85 | 3 |
| 70 | 116 | 4.1 |
| 80 | 128 | 4.5 |
| 90 | 151 | 5.3 |
| 100 | 173 | 6.1 |
| 110 | 199 | 7 |
| 120 | 224 | 7.9 |
| 130 | 250 | 8.8 |
| 140 | 278 | 9.8 |
| 150 | 307 | 10.8 |
| 160 | 335 | 11.8 |
| 180 | 395 | 13.9 |
| 200 | 457 | 16.1 |
| 220 | 523 | 18.4 |
| 250 | 628 | 22.1 |
| 300 | 809 | 28.5 |
| 350 | 1003 | 35.3 |
| 400 | 1210 | 42.6 |
| 450 | 1426 | 50.2 |
| 500 | 1653 | 58.2 |
| 550 | 1889 | 66.5 |
| 600 | 2133 | 75.1 |
| 650 | 2386 | 84 |
| 850 | 3465 | 122 |
| 1000 | 4374 | 154 |
| 1200 | 5623 | 198 |
| 1400 | 6986 | 246 |
| 1600 | 8435 | 297 |
| 1800 | 9940 | 350 |
| 2000 | 11502 | 405 |
Top
Injection Molding Clamping Force Calculation
| Class | Plastic Material | Constant K |
|---|---|---|
| 1 | PS,PE,PP | X1.0 |
| 2 | PA,PBT,PETP | X1.3-1.35 |
| 3 | CA,CAB,CAP,EVA,PEEL,PPVC | X1.35-1.45 |
| 4 | ABS,ASA/AAS,POM | X1.45-1.55 |
| 5 | PMMA,PC/ABS,PC/PBT | X1.55-1.70 |
| 6 | PC,PES,PSU,PEEK,UPVC,PEI | X1.70-1.90 |
chart 1.
A round PC lamp base with 220mm outter diameter,and the wall thickness range from 1.9-2.2mm,the gate is one drop pinpoint gate.What is the clamping force need for this part?
F=Po*K*S
S: S=3.14*22*22/4=380CM^2
P0: L/T=200/1.9=105:1 [200 is the longest distance of melt flowing=220/2+90(runner lenght)]
check the chart 1. above,the 105 points to the pressure about 165,so the Po is 160 bar
K: PC material ‘s constant K is 1.7-1.9,now we choose 1.9 for safe reason,so
F=160*1.9*380=115.5 ton.
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The L/T ratio:
| 1.0mm (thickness) | 1.5mm (thickness) | 2.0mm (thickness) | 2.5mm (thickness) | 3.0mm (thickness) | 3.5mm (thickness) | 4.0mm (thickness) | |
|---|---|---|---|---|---|---|---|
| GPPS | <60 | 60-110 | 110-170 | 170-240 | 240-340 | 340-450 | 450-560 |
| HIPS | <60 | 60-110 | 110-160 | 160-230 | 230-330 | 330-420 | 420-520 |
| PP | <70 | 70-130 | 130-180 | 180-250 | 250-380 | 380-500 | 500-650 |
| PE | <80 | 80-150 | 150-220 | 220-300 | 300-430 | 430-580 | 580-700 |
| POM | <50 | 50-100 | 100-150 | 150-210 | 210-310 | 310-420 | 420-500 |
| ABS | <50 | 50-100 | 100-150 | 150-200 | 200-300 | 300-400 | 400-500 |
| AS | <40 | 40-80 | 80-130 | 130-180 | 180-250 | 250-350 | 350-450 |
| PC | <35 | 35-70 | 70-110 | 110-160 | 160-200 | 200-280 | 280-370 |
Link to this article：clamping tonnage VS shot weight,widget for injection molding calculation
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