NAMBA October 2021 Web.pub

PROPWASH October 2021 17 Propwash Advertising Rates Classified Ad - $10.00 Business Card - $25.00 1/4 Page - $25.00 1/2 Page - $50.00 Full page - $100.00 These prices are per issue. Multi issue discounts are available. Advertising will be printed in the body of the newsletter in the same color as the text. Please call for quotes for special or two color printing. Should an advertiser choose to supply the Propwash with professionally printed or multi-colored flyers for insertion into the newsletter, the charge will be $50.00, as well as the delivery to the NAMBA office of approximately 1500 flyers. Please call the NAMBA office at (760) 522-9138 for more information or for special advertising requests. At this point you need to think about how the part will fit in the printed mold. There will be fine layer lines creating grooves that will tend to lock the part in place. Printing each mold section on end means the grooves will align with the direction you will be pulling the cured part out of the mold. Below is the actual mold bolted together with M3 screws. I ran out of red so the end was printed in white. However, it’s a lot easier to lay up a part in a dark colored mold. For a production mold I would use a parting agent, like Freecoat that lasts for several parts and doesn’t require cleanup. However, for a one off, wax and PVA are fine and have the advantage that they partly fill the grooves. The final result is below The surface has the mold separation lines and a few grooves, but a little sanding and primer will solve this. Finishing this final part is a lot easier than finishing a plug and mold. My next one-off project was a jet boat. More about it in another article. The mold has fine lines on it as this picture shows. A mold was generated by cutting the above solid model in Fusion 360 into a suitably sized block. This had to be cut into sections to fit my printer. Some legs and flanges were added to the mold sections resulting in the shape below.