Team Photo (left to right): Andrea Pedroza, Spencer Davis, Alex Simmions, and Shannon McHatton

The objective for the team, Empire Today, was to find a way to add value to SCRAP Humboldt's donated carpet samples. We created a carpet sample dry mop that would function as an effective dusting device of hardwood, linoleum, and tile flooring. It features 3D printing<ref>3-D printing<ref>of a ball and socket joint that connects a handle with a head comprised of carpet samples. This design will help divert carpet samples from the waste stream. There were other designs and iterations that were considered, but the carpet sample dry mop proved to be the best solution to the problem.

Background[edit | edit source]

SCRAP Humboldt<ref>SCRAP Humboldt<ref>is a creative reuse center in Humboldt County, California. SCRAP Humboldt aims to take materials that can still be used to create new products. SCRAP teamed up with Cal Poly Humboldt students enrolled in Engr 215 Introduction to Design<ref>Engr 215 Introduction to Design<ref>to promote sustainable living by challenging teams of to create projects that were aimed towards diverting usable materials from the waste stream. One of the materials in particular was carpet samples. From this project assignment the Carpet Sample Dry Mop was created.

Problem statement and criteria[edit | edit source]

SCRAP Humboldt has an abundance of donated carpet samples, but no practical use for them. Team Empire Today thought to make a dry mop out the carpet samples. The table below shows the criteria that was important for the dry mop to have, its definition of the criteria, as well as the level of importance.

Criteria Description Weight (1-10)
Functionality Must be able to rotate 360o smoothly. 9
Usability Easy to use. 8
Quality Able to last at least a month. Must survive multiple washes. 7
Durability Able to last at least a year. Must survive multiple washes. 7
Cost Must not be more than $15 or more than a similar products on the market. 6
Sustainability Be made from mostly recycled material. 6
Aesthetics Must be pleasant to look at. 5

Description of final project[edit | edit source]

Our final product is a carpet sample dry mop. It consists of a wooden handle that is attached to our 3D printed ball and socket joint with a pin. This pin firmly connects the handle and the joint. The joint is fixed to a small wooden block with four small screws. The block is stapled to a piece of industrial carpet. A softer wool carpet sample is attached to the bottom of the mop with velcro. The velcro was superglued to the top and bottom edge of the industrial and wool carpet sample. This allowed for quick removal of the carpet head for cleaning.

Costs[edit | edit source]

Material Costs[edit | edit source]

This table illustrates the market cost of the materials we used, and the cost that we actually paid.

Quantity Material Source Our Cost ($) Total ($)
1 Spool of Velcro Fabric Store 2.00 2.00
1 Spool of Thread Fabric Store 1.25 1.25
1 Pole Donated 0.00 3.00
1 3-D Ball Joint HSU 0.00 8.00
2 Carpet Samples SCRAP Humboldt 2.00 2.00
1 Package of Screws Donated 0.00 4.00
1 Wood Donated 0.00 3.00
Total Cost $7.25 $25.25

Maintenance Costs[edit | edit source]

This table shows the cost to keep the mop in great working condition. Over time the velcro will become loose so you will need to rip off the old velcro and superglue the new velcro to the carpet. To clean the carpet, just detach the wool carpet sample from the industrial carpet sample and place it in the washer. After multiple washes you will notice that the carpet wears and starts to unravel. Once it becomes to unraveled to use you will need to replace it. The chart below gives the maintenance item and the cost to replace it.

Maintenance Item Cost ($)
Velcro 2.00
Carpet Samples 2.00
Washing 0.50
Total Cost $4.50

Testing Results[edit | edit source]

Result Description
During our testing we used the carpet sample dry mop on linoleum floors. The floor was dirty and had large pieces of trash, dirt, and dust. The carpet sample dry mop was able to easily clean up the mess on the floor. In addition it was able to navigate smoothly in tight spaces and pick up much of the dust and dirt. During the testing process it was found that the carpet sample dry mop didn't work well when using dusting sprays, although it was able to pick up dust without a dusting spray.

Materials[edit | edit source]

  • Old broom or mop stick (preferably wood)
  • 1/4 in diameter bolt and nut (bolt needs to be 1-3/4 in long)
  • O ring with OD = 1-7/16 in and ID = 1-5/16 in (wall = 1/16 in)
  • 4 screws ( 3/16 in diameter and 3/4 in long)
  • Wooden block (dimensions = 2-3/4 X 1-1/2 X 3/4)
  • Staple gun and staples
  • Carpet Samples (one with soft material for mop head and one with sturdy backing to attach head to the joint)
  • Velcro (1 foot cut into 4 equal sections)
  • Drill
  • Super glue
  • 3D printed ball and socket joint. (Joint: File:Ball and Socket Joint.stl) (Ball: File:Ball and Socket Joint Ball.stl)

How To Build[edit | edit source]

3D Joint

Assemble 3D joint and bound together by inserting the o-ring into the grove on the outside of the semi-sphere.


Drill through pole and than attach pole to the joint, using the bolt and nut.


Attach joint to wooden block using the four screws.


Attach wooden block to a sturdy carpet sample only with staple gun and staples (do not attach softer sample with staples).

Thread Adapter

Super glue Velcro to both carpet samples in the corners.

Thread Foot Valve

Attach the softer sample to the sturdy one using the Velcro only allowing you to remove the sample off easily by undoing the Velcro. Now you are done!

Video[edit | edit source]


Discussion and Next Steps[edit | edit source]

Our challenge was to add value to carpet samples that would normally just go into the waste stream. The carpet sample dry mop does that and so much more. The mop is great for its purpose, but there is always room to get better. To improve the sustainability of the mop, we could use recycled plastics for 3D printing instead of using the commonly used ABS plastic. This would make the mop almost 100% from recycled materials.

Authors[edit | edit source]

References[edit | edit source]

Update October 2016[edit | edit source]

The original carpet samples dry mop (made in 2013) is currently at SCRAP Humboldt. As reported by the current director, Mindy Hiley, the mop is used regularly for cleaning and maintenance at SCRAP Humboldt. Some of the blue paint on the wood pole is worn off because of use, and it has some minor scratches and dust around the mop area also because of regular use. On average the carpet samples are washed every two weeks, and exchange for a new one around every 4-5 months. The 3D printed ball & socket joint still work perfectly, and overall the mop is in great condition & still usable.

FA info icon.svgAngle down icon.svgPage data
Keywords upcycling gallery
Authors Alex Simmons, Spencer Lee Davis, Andrea Pedroza
License CC-BY-SA-3.0
Language English (en)
Related 0 subpages, 8 pages link here
Aliases SCRAP Humboldt crapet sample dry mop
Impact 583 page views
Created April 15, 2013 by
Modified August 22, 2023 by Lonny Grafman
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