From 5548a79f9f9d2706f5760460d734b59e5c9a29a1 Mon Sep 17 00:00:00 2001 From: Mitalee Parikh <mitalee.parikh@students.iaac.net> Date: Sun, 31 Oct 2021 22:20:40 +0800 Subject: [PATCH] mc update2 --- docs/Molding & Casting.md | 82 +++++++++++++++++++++------------------ 1 file changed, 44 insertions(+), 38 deletions(-) diff --git a/docs/Molding & Casting.md b/docs/Molding & Casting.md index 3ab4fe5..16d27b4 100644 --- a/docs/Molding & Casting.md +++ b/docs/Molding & Casting.md @@ -1,15 +1,26 @@ -Molding & Casting -======================= - -### Reviewing materials +#Molding & Casting + +###Page Summary +1. Reviewing data sheets for each molding and casting materials +2. Designing a 3D mold +3. Creating Toolpaths +4. Milling +5. Casting parts +6. Comparing casts +7. references +8. Design Files +--- + +1. Reviewing data sheets for each molding and casting materials +--- Materials are available in the lab: -Smooth-on Sorta Clear 37 -Smooth Cast 300 and 305 -EasyMold Silicon Rubber -EasyMold Silicon Putty -Smooth-on mold release agent +* Smooth-on Sorta Clear 37 +* Smooth Cast 300 and 305 +* EasyMold Silicon Rubber +* EasyMold Silicon Putty +* Smooth-on mold release agent -#### [Smooth-on Sorta Clear 37](https://www.smooth-on.com/products/sorta-clear-37/) +**[Smooth-on Sorta Clear 37](https://www.smooth-on.com/products/sorta-clear-37/)** This series of rubbers by Smooth-on are white translucent silicone rubbers that cure at room temperature with negligible shrinkage. They are very versatile because they offer a lot of easy features like: @@ -39,7 +50,7 @@ The webpage for [Sorta Clear 37](https://www.smooth-on.com/products/sorta-clear- Understanding and following this is important to avoid accidents. [Link to Safety Data Sheet](https://www.smooth-on.com/msds/files/BD_DS_Eco_Equ_EZB_EZS_Psy_MS_OOMOO_Reb_ST_SS_Soma_Sol_Sorta.pdf) -#### [Smooth Cast 300](https://www.smooth-on.com/products/smooth-cast-300/) and [Smooth Cast 305](https://www.smooth-on.com/products/smooth-cast-305/) +**[Smooth Cast 300](https://www.smooth-on.com/products/smooth-cast-300/) and [Smooth Cast 305](https://www.smooth-on.com/products/smooth-cast-305/)** This series of liquid plastics by Smooth-on are ultra-low viscosity casting resins that yield bright white and virtually bubble free castings. Some important features they offer are: @@ -98,14 +109,12 @@ The webpage for EasyMold Silicon Rubber also shares its [technical data sheet](h This product comes in both liquid form and aerosol. It can be sprayed onto a mold to help release casts from properly prepared models. [Link to Safety Data Sheet](http://www.smooth-on.com/msds/files/Universal_Mold_Release_Aerosol.pdf) -### Test casts - -For my test casts, I made a quick smaller version of the dodecahedron I make later in the weeks assignment. - -I made a dodecahedron in rhino and then made it's molds. - -###Process +The process of molding and casting goes like this: + +So the first task is to design a mold around the object to be cast. The mold design can be in 1, 2 ore more parts depending on the geometry of the object. +2. Designing a 3D mold +--- First made a pentagon, then rotated it along its side at an angle of 116.565. Polar array on all 5 sides. Mirrored horizontally. Oriented both pieces to match. Put it in a bounding box. Extended the middle @@ -116,8 +125,8 @@ and boolean differenced the previous ones.  -### Toolpaths - +3. Creating Toolpaths +--- I used [FabModules](http://fabmodules.org/) to make the roughing and finishing toolpaths. @@ -142,35 +151,31 @@ First I saved the mold as .stl and then in FabModules... * **Calculate finishing** with above settings and save Here is a gif that shows process for roughing toolpath calculation - -  + This is how the final roughing toolpaths look: - -  + Here is a gif that shows the difference for finishing toolpath -calculation - -  +calculation + This is how the final finishing toolpaths look like: + -  - -### Milling - +4. Milling +--- Will do this step when I'm back in the lab. -### Casting - +5. Casting parts +--- Will do this step when I'm back in the lab. -#### REferences - -Process of making a mold and casting objects: - +6. Comparing casts +--- +7. References +--- Types of endmills:  @@ -183,7 +188,8 @@ Drilling vs Milling: Centering:  -### Files +8. Design Files +--- * [Dodecahedron 3D model](./images/mc/dodecahedron.3dm.zip) * [STL file](./images/mc/dodecahedronCAM.stl.zip) * [roughing.rml](./images/mc/roughing.rml.zip) -- GitLab