Cutting Rate refers to the qty of qualified required glass size after glass cutted before polishing.
The Formula is qualified glass with required size qty x required glass length x required glass width / raw glass sheet length / raw glass sheet width=cutting rate
So at first, we should get a very clear understanding on the standard raw glass sheet size and how many millimetre (mm.) should leave for glass length & width when cutting:
| Glass Thickness (mm) | Standar Raw Glass Sheet Size (mm) | Millimetre should leave for glass L. & W. (mm) |
| 0.25 | 1000×1200 | 0.1-0.3 |
| 0.4 | 1000×1500 | 0.1-0.3 |
| 0.55/0.7/1.1 | 1244.6×1092.2 | 0.1-0.3 |
| 1.0/1.1 | 1500×1900 | 0.1-0.5 |
| above 2.0 | 1830×2440 | 0.5-1.0 |
| 3.0 & above 3.0 | 1830×2400;2440×3660 | 0.5-1.0 |
For example:
| Required Glass Size | 454x131x4mm |
| Standard Raw Glass Sheet Size | 1836x2440mm; 2440x3660mm |
| Millimetre should leave for glass L. & W. (mm) | 0.5mm for each side |
| Raw Glass Sheet Size | 1830 | 2440 | 1830 | 2440 |
| Required glass size with add mm when cutting | 454+0.5+0.5 | 131+0.5+0.5 | 131+0.5+0.5 | 454+0.5+0.5 |
| Qty after raw sheet divided by requried glass size | 4.02 | 18.48 | 13.86 | 5.36 |
| Total qualfied glass qty | 4×18=72pcs | 13×5=65pcs | ||
| Cutting Rate | 72x454x131/1830/2440=95% | 65x454x131/1830/2440=80% | ||
| Raw Glass Sheet Size | 2240 | 3360 | 2240 | 3360 |
| Required glass size with add mm when cutting | 454+0.5+0.5 | 131+0.5+0.5 | 131+0.5+0.5 | 454+0.5+0.5 |
| Qty after raw sheet divided by requried glass size | 4.92 | 25.45 | 16.97 | 7.38 |
| Total qualfied glass qty | 4×25=100pcs | 16×7=112pcs | ||
| Cutting Rate | 100x454x131/2440/3660=66% | 112x454x131/2440/3660=75% | ||
So obviously we got to know, 1830x2440mm raw sheet are first choice when cutting.
Have you got an idea how to count the cutting rate?
Post time: Nov-01-2019
