Concrete trowel: Difference between revisions

This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printingPlease leave comments using the talk page. The course runs in the Fall semester. It is not open edit.Read more...

This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printingPlease leave comments using the talk page. The course runs in the Fall semester. It is not open edit.Read more...

Title of the device or system

Project developed by Ethan Marshall

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Abstract

1. The concrete trowel can be used as a cheaper method for smoothing concrete walls and could be used for smoothing out plaster on walls in developing countries. This trowel would help fulfill the needs of affordable tools for concrete and interior work on houses and buildings in developing countries
2. Picture of completed print using

   

Bill of Materials

CAD files of parts FreeCAD files found here

STL

• File:Masonary handle.stl
• File:Masonary toolbase.stl

Purchased materials

• JB weld

Tools needed for fabrication of the OSAT

1. MOST Delta RepRap

Skills and Knowledge Necessary to Make the OSAT

• N/A

Technical Specifications and Assembly Instructions

- The masonry tool base slicer settings were

• Layer Height: 0.25 mm
• Top/Bottom layer thickness: 0.75 mm
• Shell Thickness: 1.4
• Fill Density: 100%
• Printer Speed: 30 mm/s
• Travel Speed: 50 mm/s

- The masonry handle slicer settings

• Layer Height: 0.25 mm
• Top/Bottom layer thickness: 0.75 mm
• Shell Thickness: 1.4
• Fill Density: 60%
• Printer Speed: 60 mm/s
• Travel Speed: 50 mm/s

- Print times: 2 hr 46 min for the tool base and 59 min for the handle- total time: 3 hr 45 min -Assembly

• JB weld was placed on the short end of the handle and the handle was placed in the middle of the tool base (2 1/16 in from the long side and 4 in from the short side of the tool base)

Common Problems and Solutions

• Include common mistakes/problems to avoid in building your OSAT and how to overcome them

Cost savings

• 70 g of PLA filament were used which was a total cost of $1.12 at $16 for 1 kg of PLA filament
• The JB weld cost $3.00 for 2 oz of JB weld but only about .5 oz was used in assembly which cost about $0.33
• Adding up both costs the total cost is $1.45
• Trowels can range in price from $3.00 to $50
• The cost savings would be $1.55 to 48.55
• The cost savings in percent would be 51% to 97.1%

References

^[1]