Grain/Wood Plastic Masterbatch Operation Procedure (For Injection Machine)
| Operation Procedure ( Injection Molding ) |
| 1. | Dry grain effect MBs for 2 to 3 hours at 80℃. | |||||||||
| 2. | Activate ( water ) cooling system when you start processing. | |||||||||
| 3. | 1.3 mm < Molding slot point >3mm. Molding slot point better be shaped like "︱" or " ━ " instead | |||||||||
| of "‧". Both sizes and shapes of molding slot point can affect grain effect developments greatly. | ||||||||||
| 4. | Product thickness ≧ 1.3mm. | |||||||||
| 5. | Set Backpressure at " 0 " at first. | |||||||||
| 6. | When and how to do the Adjustments: | |||||||||
| a. | If MBs do not melt properly and thus seeds can been seen, increase 5 to 10 ℃ in the mixing stage. | |||||||||
| Still not working, increase the backpresure mildly. | ||||||||||
| b. | If MBs have melted totally and thus no grain appears, decrease 5 to 10 ℃ in the mixing stage. | |||||||||
| if it doesn't work, decrease the backpresure mildly. | ||||||||||
| c. | If the grain patterns appear densely on certain area, | |||||||||
| speed up the injection which help to spread grain pattern evenly . | ||||||||||
| If there is no grain developed on the molding, shlow down injection speed. | ||||||||||
| d. | Grain patterns won't be stable until 6 to 10 shots, wait for the process results. | |||||||||
| 7. | With satisfactory result, keep the record of parameters for use of mass production. | |||||||||
| 8. | Whatever difficulties happen during the trial, | |||||||||
| present your settings and trial photos to NPC, we will help out. | ||||||||||
| 9. | Below are reference setting for your reference only. As individual moling is different , | |||||||||
| your experience comes first. | ||||||||||
.JPG)
Remark:
(1) For soft plastic, axis speed adjustment is set to low speed and rigid plastic is set to middle or high speed.
(2) After you manage t o get grain effect please be informed that at this stage lower work ing temperature to get wider pattern, higher working temperature to get thinner pattern.
(3) Comparing Working temperature of injection machine with extrusion machine; injection machine setting is lower than extrusion machine simple because material will stay in the barrel longer.
- Actual operation temperature may be varied on the use of materials, machines and moldings.
