Paper towel dispenser
From DDL Wiki
(→FMEA Analysis) |
(→FMEA Analysis) |
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| 22 || Front Spindle Housing ||Final housing before paper leaves device || Fractures|| | | 22 || Front Spindle Housing ||Final housing before paper leaves device || Fractures|| | ||
* User dissatisfaction | * User dissatisfaction | ||
- | || | + | ||3|| |
*Improper assemblying | *Improper assemblying | ||
*Improper manufacturing | *Improper manufacturing | ||
||2|| | ||2|| | ||
- | * | + | *Packaging |
- | || | + | *Material selection |
- | * | + | *Mold design |
- | ||Assembly | + | ||6||36|| |
+ | *Select a stiffer material | ||
+ | ||Assembly and Manufacturing | ||
|- | |- | ||
Line 359: | Line 361: | ||
| 23 || Spindle Housing Back ||Back of spindle housing || Fractures || | | 23 || Spindle Housing Back ||Back of spindle housing || Fractures || | ||
* User dissatisfaction | * User dissatisfaction | ||
+ | ||3|| | ||
+ | *Improper assemblying | ||
+ | *Improper manufacturing | ||
||2|| | ||2|| | ||
- | * | + | *Packaging |
- | * | + | *Material selection |
- | + | *Mold design | |
- | * | + | ||6||36|| |
- | || | + | *Select a stiffer material |
- | * | + | ||Assembly and Manufacturing |
- | ||Assembly | + | |
|- | |- | ||
| 24,25 || Spindle Housing (L,R) || Sides of spindle housing || Breaks || | | 24,25 || Spindle Housing (L,R) || Sides of spindle housing || Breaks || | ||
- | |||
* Unable to hold spindle | * Unable to hold spindle | ||
||5|| | ||5|| | ||
- | * | + | *Improper assemblying |
- | || | + | *Improper manufacturing |
- | * | + | ||2|| |
- | || | + | *Packaging |
+ | *Mold design | ||
+ | ||6||60|| | ||
* None | * None | ||
- | ||Assembly | + | ||Assembly and Manufacturing |
|- | |- | ||
Line 385: | Line 390: | ||
| 29 || White Teeth Guide/Arm||Guides cutting teeth in spindle || Breaks || | | 29 || White Teeth Guide/Arm||Guides cutting teeth in spindle || Breaks || | ||
*Malfunctioning of mechanical spindle | *Malfunctioning of mechanical spindle | ||
- | |||
- | |||
- | |||
||3|| | ||3|| | ||
- | * | + | *Improper assemblying |
- | || | + | *Improper manufacturing |
- | * | + | ||3|| |
+ | *Packaging | ||
+ | *Mold design | ||
+ | ||6||36|| | ||
+ | * None | ||
||Assembly and Manufacturing | ||Assembly and Manufacturing | ||
Line 401: | Line 407: | ||
*User dissatisfaction | *User dissatisfaction | ||
||4|| | ||4|| | ||
- | * | + | *Improper manufacturing |
||3|| | ||3|| | ||
- | * | + | * Material selection |
+ | * Teeth design | ||
||1||12|| | ||1||12|| | ||
- | * | + | * Redesign teeth |
- | || | + | || Manufacturing |
|- | |- | ||
Line 412: | Line 419: | ||
| 31,32 || Spindle ||Back of spindle housing || Warps/Breaks|| | | 31,32 || Spindle ||Back of spindle housing || Warps/Breaks|| | ||
- | *Malfunctioning of | + | *Malfunctioning of machinery |
||5|| | ||5|| | ||
- | *Improper | + | *Improper assemblying |
- | * | + | *Improper manufacturing |
- | || | + | ||2|| |
- | * | + | * Material selection |
- | || | + | * Mold design |
+ | ||3||30|| | ||
* None | * None | ||
||Assembly and Manufacturing | ||Assembly and Manufacturing |
Revision as of 00:57, 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, Warped |
| 7 |
| 4 |
| 2 | 56 |
| Reliability
|
02 | Front Housing Clip | Holds housings together | Bends |
| 4 |
| 2 |
| 6 | 48 |
| Assembly and 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 |
| Reliability |
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 |
| Manufacturing 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 | Manufacturing |
21 | Thin Paper Guide | Guides paper out of device | Breaks |
| 4 |
| 3 |
| 1 | 12 |
| Manufacturing |
22 | Front Spindle Housing | Final housing before paper leaves device | Fractures |
| 3 |
| 2 |
| 6 | 36 |
| Assembly and Manufacturing |
23 | Spindle Housing Back | Back of spindle housing | Fractures |
| 3 |
| 2 |
| 6 | 36 |
| Assembly and Manufacturing |
24,25 | Spindle Housing (L,R) | Sides of spindle housing | Breaks |
| 5 |
| 2 |
| 6 | 60 |
| Assembly and Manufacturing |
29 | White Teeth Guide/Arm | Guides cutting teeth in spindle | Breaks |
| 3 |
| 3 |
| 6 | 36 |
| Assembly and Manufacturing |
30 | Cutting Teeth | Back of spindle housing | Wears/Bends |
| 4 |
| 3 |
| 1 | 12 |
| Manufacturing |
31,32 | Spindle | Back of spindle housing | Warps/Breaks |
| 5 |
| 2 |
| 3 | 30 |
| Assembly and Manufacturing |
DFE Analysis
Team Member Roles
- Eric Totong:
- Chang Keun Jung:
- James Li-Yang Lee:
- Nishan Kulatilaka: