Since the production methods (hot process PF and cold process PF) differ by required PF specification, the transmittance is slightly different between them. Both hot process PF glass and cold process PF glass are listed in this catalog. When you order PF, please provide us with your drawing for the product. We will prepare the PF drawing based on your information. We will take into consideration the production methods, the technical requirements as well as applying the following standards.
1. BALL PF (Heat Process PF)
Ball PF weight tolerance, diameter and its tolerance, long and short axis difference is shown in Table 5.
Table5 : diameter and its tolerance, long and short axis difference, weight tolerance.
| volume (mm3) | diameter (mm) | diameter tolerance(mm) | long and short axis difference(mm) | weight tolerance(%) |
|---|---|---|---|---|
| 3.0〜8.0 | 1.8～2.5 | ±0.07 | ≦0.1 | ±1.0 |
| 8.0〜30.0 | 2.5～3.9 | ±0.07～0.10 | ≦0.15 | ±1.0 |
| 30.0〜140.0 | 3.9～6.4 | ±0.10～0.15 | ≦0.20 | ±1.0 |
2. Gob PF (Heat Process PF)
Gob PF diameter and its tolerance, radius curvature, long and short axis difference, Weight tolerance are shown in Table 6-1,6-2.
Table 6-1 Weight tolerance, diameter and its tolerance, long and short axis difference
| volume(mm3) | diameter(mm) | diameter tolerance(mm) | thickness(mm) | thickness torelance(mm) |
|---|---|---|---|---|
| 100～180 | 6.5～8.0 | ±0.10 | 4.5～6.0 | ±0.10 |
| 180〜350 | 8.0～10.0 | ±0.10 | 5.0～7.5 | ±0.10 |
| 350〜530 | 10.0～12.0 | ±0.15 | 6.0～7.5 | ±0.15 |
| 530〜700 | 12.0～14.0 | ±0.15 | 6.0～8.5 | ±0.15 |
| 700〜1000 | 13.5～16.5 | ±0.15 | 7.0～9.0 | ±0.15 |
| 1000〜1800 | 15.5～20.0 | ±0.20 | 7.0～10.0 | ±0.20 |
| 1800〜2300 | 19.0～22.0 | ±0.20 | 8.0～10.5 | ±0.20 |
| 2300～2500 | 21.0～25.0 | ±0.20 | 8.5～11.5 | ±0.20 |
| 2500～3000 | 21.0～26.0 | ±0.25 | 9.0～12.5 | ±0.25 |
| 3000～3500 | 23.0～27.0 | ±0.25 | 9.0～11.5(※1) | ±0.25 |
※1: The thickness becomes thinner according to the outer diameter.
Table 6-2
| volume （mm3） |
radius curvature | long and short axis difference (mm) |
weight tolerance (%) |
|||
|---|---|---|---|---|---|---|
| R1 | tolerance | R2 | tolerance | |||
| 100～180 | 4.0～15.0 | ±2.0 | 4.0～7.0 | ±2.0 | ≦0.1 | ±1.0 |
| 180〜350 | 6.0～20.0 | ±2.0 | 5.0～8.5 | ±2.0 | ≦0.1 | ±1.0 |
| 350〜530 | 8.0～25.0 | ±3.0 | 5.0～15.0 | ±2.5 | ≦0.2 | ±1.0 |
| 530〜700 | 10.0～30.0 | ±2.5～4.0 | 7.0～15.0 | ±3.0 | ≦0.2 | ±1.0 |
| 700〜1000 | 15.0～40.0 | ±3.0～6.0 | 9.0～15.0 | ±3.0 | ≦0.2 | ±1.0 |
| 1000〜1800 | 20.0～60.0 | ±4.0～8.0 | 9.0～20.0 | ±4.0 | ≦0.3 | ±1.0 |
| 1800〜2300 | 40.0～100.0 | ±6.0～10.0 | 11.0～25.0 | ±4.0 | ≦0.3 | ±1.0 |
| 2300～2500 | 60.0～150.0 | ±8.0～15.0 | 13.0～30.0 | ±4.0 | ≦0.3 | ±1.0 |
| 2500～3000 | 60.0～150.0 | ±10.0～15.0 | 13.0～30.0 | ±4.0 | ≦0.3 | ±1.0 |
| 3000～3500 | 60.0～150.0 | ±10.0～20.0 | 20.0～30.0 | ±4.0 | ≦0.3 | ±1.0 |
R1 is (free surface / dull surface), R2 is (mold surface / sharp surface). R2 is below the above lower limit
Please contact us for more information. (Volume: 200 to 1400 mm3)
3. Cold Process PF
Please consult us for the detailed specification.
