The activity of this week is to design a mold and make a composite material using the mold.
STEP 1: DESIGN MOLD
For this activity use the Autocad program to mold; As you can see is a chopping board shaped like a guitar.
The design was made in SUDA ROUTER using the POCKETING function with a depth of 6mm, necessary to make a layer of resin - a layer of fiberglass and another layer of resin..
The design was drawn in rinoceros and G code was generated to execute in the SUDA CNC, as shown in the following figures:
STEP 2: MACHINING MOLD
The machine was configured with the following parameters:
PARAMETERS
Toolpath: pocketing
Deep: 10 mm
speed: 1000rpm
Milling Process (Video)
STEP 3: PREPARING MOLD AND COMPOSITES
In this case we will use glass fiber with resin and its activators cobalt and peroxide. The following figure shows the materials and equipment used.
The following image shows the procedure for making the product.It is necessary to use the gloves at all times (when working with fiberglass).
The quantities for 45 grams of resin are: 15 drops of cobalt and 8 drops of peroxide. To obtain a drying time of approximately 4 hours.
STEP 4: PRESENTATION OF FINAL PRODUCT
After 4 hours of drying the product is as shown in the figure.
CONSIDER
The manufacturer's sheet is presented for correct use and safety measures:
OBSERVATION AND CONCLUSION
OBSERVATION
- Always the cobalt is mixed first and after the peroxide.
- Lubricate the wooden mold with mold release wax to prevent it from sticking
- Peroxide and cobalt should never be mixed at the same time, because it has a strong chemical reaction
- To obtain more thickness another layer of fiber and another of resin is added.
CONCLUSION
- It was obtained a better result with 15 drops of cobalt and 8 drops of peroxide..
- The chopping board thickness was 5.5 mm and had good rigidity and hardness.
- The proportion found was verified after several tests
- The proportion found is scalable for other quantities with a linear trend.
