▼This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing

Please leave comments using the talk page. The course runs in the Fall semester. It is not open edit.

▼Preliminary Student Design Warning

This page is a preliminary student design and has not been vetted. Care should be taken to read critically and weigh the evidence. Remember non-tested and vetted designs should not be relied on, especially in matters of health and safety.

• To be practical this must be scaled up
• Increase support in mech-stressed regions
• Reduce plastic on non-mech stressed components
• Ergo handle needed

OSAT Potato Ricer (Extruder)

Project developed by Caaukee (talk) 13:30, 5 December 2016 (PST)

File:Ricer1 2.JPG

Abstract

1. This design is a 3D printed potato ricer. Potato ricers work by extruding cooked potato (or possibly other starch rich foods) through small holes. This creates a lighter fluffier finished product than conventional mashing. This works by trapping air along with the potato during extrusion. The design is appropriate technology because commercially available equivalents range in price from $15-$30 USD. The availability of this design to be 3D printed could help raise the quality of life in developing countries by supplying a low cost food processing device. The design has been prototype, tested, and redesigned several times to ensure it can handle the significant pressure and bending forces during the extrusion process while not using excessive material.
2. Picture of completed Ricer (See Right)

   

3. Video of Ricer in use

Bill of Materials

1. All printed parts
2. 1 Ricer Bowl
3. 3 Pins
4. 1 Arm
5. 1 Connecting Rod
6. 1 Piston
   1. Ricer STL and OSCAD Files

Tools needed

1. MOST Delta RepRap or similar RepRap 3-D printer

Technical Specifications and Assembly Instructions

1. Print all parts at desired scale (0.75-1) recommended. Infill of 20% minimum with 2mm shell thickness required. Assemble all parts to form system shown in pictures. Some sanding of pins and reaming of holes may be required to allow insertion.

Boil potatoes 25 min, remove skins. Put potato meat into bowl of ricer, and depress lever with significant force. Place a bowl under ricer to collect the riced potatoes. Mix in with desired seasoning, milk, and butter. Lightly stir the mix until uniform.

1. 100% flow
2. 210 Degrees C
3. 70mm/s
4. 15-25% infill
5. Print time 9 hours
6. Assembly time 5 min

Cost savings

1. Cost estimate $2.00 PLA filament for full scale
2. Commercially available ricer $31.57
3. $31.57 - $2.00 = $29.57 savings or 93.4%