Using Lasagna to Make Cost-Saving Molds

Building a one-off prototype is usually pretty straightforward. Find some perfboard and start soldering, weld up some scrap metal, or break out the 3D printer. But if you’re going to do a production run of a product then things need to have a little more polish. In [Eric Strebel]’s case this means saving on weight and material by converting a solid molded part into something that is hollow, with the help of some lasagna.

What [Eric] walks us through in this video is how to build a weep mold. First, the solid part is cast in silicone. Using the cast, some “sheet clay” is applied to the inside which will eventually form the void for the new part’s walls. The clay needs to be flush with the top of the mold, though, and a trick to accomplish this task is to freeze the mold (next to the lasagna) which allows the clay to be scraped without deforming.

From there, the second half of the mold is poured in, using special channels that allow the resin to “weep” out of the mold (hence the name). This two-part process creates a much more efficient part with thin walls, rather than the expensive solid prototype part.

[Eric] is no stranger around these parts, either. He’s an industrial designer with many tips and tricks of the profession, including a method for building a machining tool out of a drill press and a vise as well as some tips for how to get the most out of a low-volume production run of a product you might be producing.

7 thoughts on “Using Lasagna to Make Cost-Saving Molds

  1. Throw-away joke in the video is the most interesting thing you got out of this, thus making it the headline? Click-bait aside, that does a disservice to the clean work and explanations done by the video creator.

    1. Transforming a Solid master part into a Thin Walled Hollow cast part, Lasagna Trick & Eclipse Bonus
      Eric Strebel
      Published on Jan 10, 2018
      This video is about Mold Making: Molding a solid part to a thin walled hollow part. Check out the Lasagna Trick I use and the Bonus Eclipse footage at the end.

      His own words, his own description…so who exactly are you trolling?

  2. Eric] is no stranger around these parts, either. He’s an industrial designer with many tips and tricks of the profession, including a method for building a machining tool out of a drill press and a vise.. Am I mistaken r was that not the one where 99% of the comments were do that and people will just call you lefty or cyclops or both?

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