Week9

Molding and casting

José J. Lazarte R.

Assignment
   Design a 3D mold,...
To make the mold I started designing in 2D using Rhinoceros software, then perform 2D design is separated into separate levels to get a mold in layers, which together should form the mold in 3D.
To see how each layer would be a solid level of each mold considering a thickness of 3mm was built.

Design in 2D model	Separation in 2D model levels	3D Molds considering a thickness of 3mm	Armed with two levels of mold
Armed with 4 levels of mold	Full cast	Interior detail of the mold	Mold and Model

After making the mold 3D implemented, I built the 3D model to compare what would be the final result. To do this i use the 2D drawings and  build the model from it.

   Machine it,...
To make the mold used the laser cutter based configuration parameters for cutting acrylic material according to the following table.

Perform cutting in different parts and fifth plane for support level.

Setting the printing of models for laser cutting.

Configuration parameters for laser cutting.

Results of using laser cut acrylic 3mm thick.

   And cast parts from it.
As material for the model I used ceramic gesso (from local market) according to the directions is faster forge but requires setting keep damp about 24 hours to achieve good consistency.

Below I show the steps followed to obtain the model of the mold, the main problem was presented to me is the formation of bubbles when pouring the material, on the other hand we must be careful to keep it moist so that hardens well otherwise it'll be tends to crumble. Regarding the design, it is better to use not very complex or angled surfaces since they generate great efforts when unmolding. In my case that impresisicon genre in the last level when removed the mold.

Mold levels are fixed by screws, and are filled one by one.	After waiting about 24Hours and moistening every 6 hours, proceed to unmold level by level.	The results of stripping allows us to observe that at the time of pouring the material into the mold air bubbles are generated that prevented the material covered the entire volume.	Unmold second level
Unmold the third level	Unmold the fourth level	Side of the model where all levels are appreciated .	Details imperfections generated by the air bubbles.