Paper towel dispenser
From DDL Wiki
(→FMEA Analysis) |
(→FMEA Analysis) |
||
Line 157: | Line 157: | ||
*Exposure of internal components | *Exposure of internal components | ||
*Possible injury to customer | *Possible injury to customer | ||
- | || | + | ||7|| |
*Improper usage | *Improper usage | ||
*Improper material | *Improper material | ||
- | || 4 || | + | ||4|| |
*Packaging | *Packaging | ||
*Material Selection | *Material Selection | ||
- | ||2 || | + | ||2|| 56|| |
*Drop test | *Drop test | ||
- | *Select stiffer | + | *Select a stiffer material |
|| Manufacturing | || Manufacturing | ||
Line 185: | Line 185: | ||
* Housing clip exposed | * Housing clip exposed | ||
||2|| | ||2|| | ||
- | * | + | * Improper usage |
||2|| | ||2|| | ||
- | * | + | * Material selection |
- | || | + | ||8||32|| |
* None | * None | ||
|| Assembly | || Assembly | ||
Line 196: | Line 196: | ||
| 04 || Rear Housing ||Holds mechanical components ||Fractures || | | 04 || Rear Housing ||Holds mechanical components ||Fractures || | ||
* Unable to hold mechanical components | * Unable to hold mechanical components | ||
- | || | + | ||7|| |
*Improper usage | *Improper usage | ||
*Improper material | *Improper material | ||
- | || 4 || | + | ||4|| |
*Packaging | *Packaging | ||
*Material Selection | *Material Selection | ||
- | ||9 || | + | ||9|| 252|| |
*Drop test | *Drop test | ||
*Select a stiffer material | *Select a stiffer material | ||
Line 211: | Line 211: | ||
| 05 || Paper Towel Holding Arm ||Holds paper towel roll || Bends || | | 05 || Paper Towel Holding Arm ||Holds paper towel roll || Bends || | ||
* Unable to hold paper towel roll due to misaligned components | * Unable to hold paper towel roll due to misaligned components | ||
- | || | + | ||6|| |
* Improper usage | * Improper usage | ||
* Incorrect Design/Manufacturing | * Incorrect Design/Manufacturing | ||
- | || | + | ||3|| |
* Material selection | * Material selection | ||
* Injection mold design | * Injection mold design | ||
- | ||2|| | + | ||2||36|| |
* Select a reliable material | * Select a reliable material | ||
||Assembly and Manufacturing | ||Assembly and Manufacturing | ||
Line 226: | Line 226: | ||
*Unable to hold mechanical components | *Unable to hold mechanical components | ||
*Possible injury to customer | *Possible injury to customer | ||
- | || | + | ||7|| |
* Improper usage | * Improper usage | ||
* Poor upkeep | * Poor upkeep | ||
- | || | + | ||6|| |
* Material selection | * Material selection | ||
- | ||8|| | + | ||8||336|| |
- | * Select a | + | * Select a reliable material |
|| Reliablity | || Reliablity | ||
Line 263: | Line 263: | ||
* Material selection | * Material selection | ||
* Improperly aligned spring | * Improperly aligned spring | ||
- | || | + | ||4 || 24|| |
* Select a stiffer material | * Select a stiffer material | ||
* Reduce stress on spring | * Reduce stress on spring | ||
Line 277: | Line 277: | ||
||2|| | ||2|| | ||
* Material selection | * Material selection | ||
- | || | + | ||4 || 24|| |
* Select a stiffer material | * Select a stiffer material | ||
* Reduce stress on spring | * Reduce stress on spring | ||
Line 295: | Line 295: | ||
||2|| | ||2|| | ||
*Material selection | *Material selection | ||
- | ||2|| | + | ||2||20|| |
- | * | + | *Select a stiffer material |
|| Assembly and Reliablity | || Assembly and Reliablity | ||
|- | |- | ||
Line 308: | Line 308: | ||
||2|| | ||2|| | ||
*Material selection | *Material selection | ||
- | + | ||3||30|| | |
- | || | + | *Select a stiffer material |
- | * | + | |
|| Assembly and Reliablity | || Assembly and Reliablity | ||
|- | |- | ||
Line 316: | Line 315: | ||
| 20 || Rounded Spring Guide ||Angles spring to desired measurement || Breaks || | | 20 || Rounded Spring Guide ||Angles spring to desired measurement || Breaks || | ||
- | *Unable to adjust spring to desired angle | + | *Unable to adjust spring to a desired angle |
- | || | + | ||3|| |
*Improper usage | *Improper usage | ||
*Incorrect Design/Manufacturing | *Incorrect Design/Manufacturing | ||
- | |||
||2|| | ||2|| | ||
*Material selection | *Material selection | ||
- | + | ||2||12|| | |
- | || | + | None |
- | + | ||
|| Assembly and Reliablity | || Assembly and Reliablity | ||
|- | |- | ||
Line 337: | Line 334: | ||
*Incorrect Design/Manufacturing | *Incorrect Design/Manufacturing | ||
||2|| | ||2|| | ||
- | * | + | * Packaging |
||1||8|| | ||1||8|| | ||
* None | * None |
Revision as of 00:16, 20 September 2009
Contents |
Executive Summary
Stakeholders
There are six major stakeholders with regards to the paper towel dispenser: Manufacturer, retailer, customer, user, society. The main needs for the manufacturer are to reduce cost and create a reliable product. For the retailer, it is being able to sell a quality product. For the customer, it is making sure it is an affordable and reliable machine. For the customer, cleanliness and ease of use are paramount. For the maintenance worker, ease of opening and replacing the paper towel are important. Society plays a role with regards to how the use of paper towel affects the ecosystem and earth in general. Listed below are the stakeholders and their respective needs.
Paper Towel Manufacturer
- Material cost
- Manufacturing cost
- Assembly
- Transporting
- Standardize/minimize parts
Retailer
- Cost
- Storage
- Reliability
- Usability
- Transporting
Customer
- Cost
- Mounting
- Ease of use
- Reliability
- Aesthetics
- Safety
User
- Ease of use / ergonomics
- Speed of operation
- Aesthetics
- Cleanliness
- Safety
Maintenance Worker
- Ease of towel replacement
- Safety
Society
- Environment
Usability Study
Assembly Pictures
How it Works
Mechanical Analysis
Parts List
DFMA Analysis
Design For Manufacture
Design For Assembly
FMEA Analysis
Part No. | Name | Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recommended Actions | Responsibility |
---|---|---|---|---|---|---|---|---|---|---|---|---|
01 | Front Housing | Protects device from exterior | Fractures |
| 7 |
| 4 |
| 2 | 56 |
| Manufacturing
|
02 | Front Housing Clip | Holds housings together | Bends |
| 4 |
| 2 |
| 6 | 48 |
| Reliablity
|
03 | Front Housing Tab | Secures housing clip | Strips |
| 2 |
| 2 |
| 8 | 32 |
| Assembly
|
04 | Rear Housing | Holds mechanical components | Fractures |
| 7 |
| 4 |
| 9 | 252 |
| Manufacturing |
05 | Paper Towel Holding Arm | Holds paper towel roll | Bends |
| 6 |
| 3 |
| 2 | 36 |
| Assembly and Manufacturing |
08 | Screw Anchor | Holds screw in wall | Fractures |
| 7 |
| 6 |
| 8 | 336 |
| Reliablity |
09 | Paper Guide Tube | Guides paper towel to cutting cylinder | Failed |
| ||||||||
10 | Spring (uneven hooks) | Holds 09 in place | Deformed |
| 3 |
| 2 |
| 5 | 30 |
| Assembly and Reliablity |
11 | Spring (even hooks) | Holds lever to spindle housing | Deformed |
| 3 |
| 2 |
| 4 | 24 |
| Assembly and Reliablity |
14 | Locking Spring | Hides screw in turning wheel | Deformed |
| 3 |
| 2 |
| 4 | 24 |
| Assembly and Reliablity |
16 | Guide clips for 09 | Guides paper on 09 | text | text | ||||||||
18 | Lever Arm | Connects spring to spindle | Breaks |
| 5 |
| 2 |
| 2 | 20 |
| Assembly and Reliablity |
19 | Spring Connector | Connects two springs to lever arm | Breaks |
| 5 |
| 2 |
| 3 | 30 |
| Assembly and Reliablity |
20 | Rounded Spring Guide | Angles spring to desired measurement | Breaks |
| 3 |
| 2 |
| 2 | 12 |
None | Assembly and Reliablity |
21 | Thin Paper Guide | Guides paper out of device | Breaks |
| 4 |
| 2 |
| 1 | 8 |
| Assembly |
22 | Front Spindle Housing | Final housing before paper leaves device | Fractures |
| 2 |
| 2 |
| 1 | 4 |
| Assembly |
23 | Spindle Housing Back | Back of spindle housing | Fractures |
| 2 |
| 2 |
| 1 | 4 |
| Assembly |
24,25 | Spindle Housing (L,R) | Sides of spindle housing | Breaks |
| 5 |
| 1 |
| 1 | 5 |
| Assembly |
29 | White Teeth Guide/Arm | Guides cutting teeth in spindle | Breaks |
| 5 |
| 3 |
| 1 | 15 |
| Assembly and Manufacturing |
30 | Cutting Teeth | Back of spindle housing | Wears/Bends |
| 4 |
| 3 |
| 1 | 12 |
| Assembly |
31,32 | Spindle | Back of spindle housing | Warps/Breaks |
| 5 |
| 1 |
| 1 | 5 |
| Assembly and Manufacturing |
DFE Analysis
Team Member Roles
- Eric Totong:
- Chang Keun Jung:
- James Li-Yang Lee:
- Nishan Kulatilaka: