Stratasys P750K, Руководство пользователя

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Handling Printed Models
7–4
DOC08010 Rev. A (DRAFT 1)
Post-Printing Treatment for Models Printed with Objet VeroClear
Models ȱ made ȱ with ȱ Objet ȱ VeroClear ȱ (RGD810) ȱ have ȱ a ȱ slight ȱ yellow ȱ tint ȱ
when ȱ removed ȱ from ȱ the ȱ printer. ȱ This ȱ is ȱ especially ȱ true ȱ for ȱ models ȱ printed ȱ
with ȱ a ȱ glossy ȱ finish. ȱ The ȱ yellow ȱ tint ȱ fades ȱ naturally ȱ over ȱ time, ȱ but ȱ you ȱ can ȱ
greatly ȱ accelerate ȱ this ȱ process ȱ by ȱ using ȱ a ȱ suitable ȱ photobleaching ȱ
treatment.
As ȱ a ȱ rule, ȱ best ȱ clarity ȱ is ȱ achieved ȱ when ȱ parts ȱ are ȱ printed ȱ with ȱ a ȱ matte ȱ
finish, ȱ and ȱ treated ȱ as ȱ explained ȱ below.
Photobleaching ȱ models ȱ involves ȱ exposing ȱ them ȱ to ȱ light. ȱ To ȱ achieve ȱ highly ȱ
controlled ȱ and ȱ predictable ȱ results, ȱ a ȱ professional ȱ illumination ȱ chamber ȱ is ȱ
recommended. ȱ However, ȱ adequate ȱ results ȱ may ȱ be ȱ obtained ȱ using ȱ ordinary ȱ
desk ȱ lamps ȱ fitted ȱ with ȱ suitable ȱ fluorescent ȱ elements.
Photo-
Bleaching
Instructions
Follow ȱ these ȱ instructions ȱ for ȱ photobleaching ȱ printed ȱ models.
•
The ȱ fluorescent ȱ lamps ȱ should ȱ be ȱ rated ȱ 45W, ȱ 6500K.
•
When ȱ using ȱ desk ȱ lamps, ȱ place ȱ the ȱ models ȱ in ȱ a ȱ container ȱ lined ȱ with ȱ
aluminum ȱ foil. ȱ Use ȱ at ȱ least ȱ two ȱ lamps, ȱ more ȱ when ȱ treating ȱ models ȱ in ȱ a ȱ
large ȱ container.
•
Arrange ȱ the ȱ models ȱ with ȱ enough ȱ space ȱ between ȱ them ȱ to ȱ allow ȱ light ȱ to ȱ
reach ȱ all ȱ sides ȱ of ȱ each ȱ model.
•
Verify ȱ that ȱ the ȱ ambient ȱ temperature ȱ around ȱ the ȱ models ȱ is ȱ
approximately ȱ 40 ºC ȱ (104 ºF). ȱ Higher ȱ temperatures ȱ may ȱ cause ȱ model ȱ
distortion; ȱ lower ȱ temperatures ȱ may ȱ not ȱ produce ȱ satisfactory ȱ results. ȱ
When ȱ using ȱ desk ȱ lamps, ȱ you ȱ can ȱ achieve ȱ the ȱ required ȱ temperature ȱ by ȱ
positioning ȱ the ȱ lamps ȱ approximately ȱ 10 ȱ cm ȱ (4 ȱ in.) ȱ above ȱ the ȱ models.
•
Inspect ȱ the ȱ models ȱ after ȱ six ȱ hours ȱ of ȱ treatment. ȱ
ˆ
For ȱ parts ȱ with ȱ a ȱ matte ȱ finish, ȱ this ȱ should ȱ be ȱ enough. ȱ Polish ȱ and ȱ
lacquer ȱ the ȱ parts.
ˆ
For ȱ parts ȱ with ȱ a ȱ glossy ȱ finish, ȱ continue ȱ the ȱ photobleaching ȱ
treatment ȱ for ȱ up ȱ to ȱ 18 ȱ hours ȱ more.
In ȱ Stratasys ȱ laboratories, ȱ there ȱ was ȱ a ȱ tint ȱ reduction ȱ of ȱ approximately ȱ
70% ȱ within ȱ six ȱ hours. ȱ After ȱ 24 ȱ hours, ȱ tint ȱ was ȱ reduced ȱ by ȱ
approximately ȱ 90%.
Figure 7-2: Illumination chamber Figure 7-3: Desk lamps
More information about this treatment is available in the application note
VeroClear RGD810 Model Material .