Paper towel dispenser

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| 03 || Front Housing Tab || Secures housing clip || 1 || <1g || Plastic || Injection Molding || [[Image:PTD Front Housing Tab.jpg| 100x100px]]
| 03 || Front Housing Tab || Secures housing clip || 1 || <1g || Plastic || Injection Molding || [[Image:PTD Front Housing Tab.jpg| 100x100px]]
|-   
|-   
-
| 04 || Rear Housing || Holds mechanical components || 1 || 986g || Plastic || Injection Molding || cell 1,8
+
| 04 || Rear Housing || Holds mechanical components || 1 || 986g || Plastic || Injection Molding || [[Image:PTD_Rear_Housing.jpg| 100x100px]]
|-   
|-   
-
| 05 || Paper Towel Holding Arm || Holds paper towel roll || 2 || 40g each || Plastic || Injection Molding || cell 1,8
+
| 05 || Paper Towel Holding Arm || Holds paper towel roll || 2 || 40g each || Plastic || Injection Molding || [[Image:PTD._Paper_Towel_Holding_Arm.jpg| 100x100px]]
|-   
|-   
-
| 06 || Phillips Head Screw (1/8'' x 1/4'' long) || Secures device to rear housing || 1 || 1g || Steel || Machined || cell 1,8
+
| 06 || Phillips Head Screw (1/8'' x 1/4'' long) || Secures device to rear housing || 1 || 1g || Steel || Machined || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 07 || Wall Mounting Screw (1/8'' x 1.25'' long) || Secures housing to wall || 4 || 3.5g each || Steel || Machined || cell 1,8
+
| 07 || Wall Mounting Screw (1/8'' x 1.25'' long) || Secures housing to wall || 4 || 3.5g each || Steel || Machined || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 08 || Screw Anchor || Holds screw in wall || 4 || ~0.25g || Plastic || Injection molding || cell 1,8
+
| 08 || Screw Anchor || Holds screw in wall || 4 || ~0.25g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 09 || Paper Guide Tube || Guides paper towel to cutting cylinder || 1 || 55g || Plastic || Injection molding || cell 1,8
+
| 09 || Paper Guide Tube || Guides paper towel to cutting cylinder || 1 || 55g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 10 || Spring (uneven hooks) || Holds 09 in place || 2 || 2g each || Metal || Extrusion || cell 1,8
+
| 10 || Spring (uneven hooks) || Holds 09 in place || 2 || 2g each || Metal || Extrusion || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 11 || Spring (even hooks) || Holds lever to spindle housing || 2 || 1.5g each || Metal || Extrusion || cell 1,8
+
| 11 || Spring (even hooks) || Holds lever to spindle housing || 2 || 1.5g each || Metal || Extrusion || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 12 || Screw (3/32'' x 5/8'' long) || holds turning wheel and lever to spindle housing || 2 || ~1g each || Metal || Extrusion || cell 1,8
+
| 12 || Screw (3/32'' x 5/8'' long) || holds turning wheel and lever to spindle housing || 2 || ~1g each || Metal || Extrusion || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 13 || Red Screw Cap || Hides screw in turning wheel || 1 || <1g || Plastic || Injection molding || cell 1,8
+
| 13 || Red Screw Cap || Hides screw in turning wheel || 1 || <1g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 14 || Locking Spring || Ensures correct wheel spin direction || 1 || 4g || Steel || Extrusion || cell 1,8
+
| 14 || Locking Spring || Ensures correct wheel spin direction || 1 || 4g || Steel || Extrusion || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 15 || Red Turning Wheel || Turns main spindle || 1 || 30g || Plastic || Injection molding || cell 1,8
+
| 15 || Red Turning Wheel || Turns main spindle || 1 || 30g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 16 || Guide clips for 09 || Guides paper on 09 || 2 || 2.5g each || Plastic || Injection molding || cell 1,8
+
| 16 || Guide clips for 09 || Guides paper on 09 || 2 || 2.5g each || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 17 || Screw (3/32'' x 3/8'' long) || Holds lever assembly together and spindle housing|| 2 || <1g each || Metal || Machined || cell 1,8
+
| 17 || Screw (3/32'' x 3/8'' long) || Holds lever assembly together and spindle housing|| 2 || <1g each || Metal || Machined || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 18 || Lever Arm || Connects spring to spindle || 1 || 1g || Plastic || Injection molding || cell 1,8
+
| 18 || Lever Arm || Connects spring to spindle || 1 || 1g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 19 || Spring Connector || Connects two springs to lever arm || 1 || <1g || Plastic || Injection molding || cell 1,8
+
| 19 || Spring Connector || Connects two springs to lever arm || 1 || <1g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 20 || Rounded Spring Guide || Angles spring to desired measurement || 1 || <1g || Plastic || Injection molding || cell 1,8
+
| 20 || Rounded Spring Guide || Angles spring to desired measurement || 1 || <1g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 21 || Thin Paper Guide || Guides paper out of device || 1 || 24g || Plastic || Injection molding || cell 1,8
+
| 21 || Thin Paper Guide || Guides paper out of device || 1 || 24g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 22 || Front Spindle Housing || Final housing before paper leaves device || 1 || 132g || Plastic || Injection molding || cell 1,8
+
| 22 || Front Spindle Housing || Final housing before paper leaves device || 1 || 132g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 23 || Spindle Housing Back || Back of spindle housing || 1 || 162g || Plastic || Injection molding || cell 1,8
+
| 23 || Spindle Housing Back || Back of spindle housing || 1 || 162g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 24 || Spindle Housing (L)|| Left of spindle housing || 1 || 105g || Plastic || Injection molding || cell 1,8
+
| 24 || Spindle Housing (L)|| Left of spindle housing || 1 || 105g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 25 || Spindle Housing (R)|| Right of spindle housing || 1 || 105g || Plastic || Injection molding || cell 1,8
+
| 25 || Spindle Housing (R)|| Right of spindle housing || 1 || 105g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 26 || White Spindle Guide || Holds spindle in line || 3 || 2.3g each || Plastic || Injection molding || cell 1,8
+
| 26 || White Spindle Guide || Holds spindle in line || 3 || 2.3g each || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 27 || Screw (3/32'' x 3/8'' long) || Connects spindle halves || 2 || <1g || Metal || Machined || cell 1,8
+
| 27 || Screw (3/32'' x 3/8'' long) || Connects spindle halves || 2 || <1g || Metal || Machined || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 28 || Square nut || For use with 27 || 2 || <1g || Steel || Cast and drilled || cell 1,8
+
| 28 || Square nut || For use with 27 || 2 || <1g || Steel || Cast and drilled || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 29 || White Teeth Guide/Arm || Guides cutting teeth in spindle || 2 || 3g each || Plastic || Injection molding || cell 1,8
+
| 29 || White Teeth Guide/Arm || Guides cutting teeth in spindle || 2 || 3g each || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 30 || Cutting Teeth || Cuts paper towel || 1 || 75g || Steel || Cast, punched and bent || cell 1,8
+
| 30 || Cutting Teeth || Cuts paper towel || 1 || 75g || Steel || Cast, punched and bent || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 31 || Spindle Top || Holds cutting tool || 1 || 125g || Plastic || Injection molding || cell 1,8
+
| 31 || Spindle Top || Holds cutting tool || 1 || 125g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
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| 32 || Spindle Bottom || Holds cutting tool || 1 || 135g || Plastic || Injection molding || cell 1,8
+
| 32 || Spindle Bottom || Holds cutting tool || 1 || 135g || Plastic || Injection molding || [[Image:Example.jpg| 100x100px]]
|-   
|-   
-
| 33 || Metal Key || Helps open housing || 1 || 5g || Steel || Punched || cell 1,8
+
| 33 || Metal Key || Helps open housing || 1 || 5g || Steel || Punched || [[Image:Example.jpg| 100x100px]]
|}
|}

Revision as of 11:31, 16 September 2009

Contents

Executive Summary

Stakeholders

There are five 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. 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


User

  • Ease of use / ergonomics
  • Speed of operation
  • Aesthetics
  • Cleanliness


Society

  • Environment


Usability Study

Parts List

Part No. Name Function QTY Weight Material Manufacturing Process Image
01 Front Housing Protects device from exterior 1 935g Plastic Injection Molding
02 Front Housing Clip Holds housings together 1 13g Steel Bending, Punching
03 Front Housing Tab Secures housing clip 1 <1g Plastic Injection Molding
04 Rear Housing Holds mechanical components 1 986g Plastic Injection Molding
05 Paper Towel Holding Arm Holds paper towel roll 2 40g each Plastic Injection Molding Image:PTD. Paper Towel Holding Arm.jpg
06 Phillips Head Screw (1/8 x 1/4 long) Secures device to rear housing 1 1g Steel Machined
07 Wall Mounting Screw (1/8 x 1.25 long) Secures housing to wall 4 3.5g each Steel Machined
08 Screw Anchor Holds screw in wall 4 ~0.25g Plastic Injection molding
09 Paper Guide Tube Guides paper towel to cutting cylinder 1 55g Plastic Injection molding
10 Spring (uneven hooks) Holds 09 in place 2 2g each Metal Extrusion
11 Spring (even hooks) Holds lever to spindle housing 2 1.5g each Metal Extrusion
12 Screw (3/32 x 5/8 long) holds turning wheel and lever to spindle housing 2 ~1g each Metal Extrusion
13 Red Screw Cap Hides screw in turning wheel 1 <1g Plastic Injection molding
14 Locking Spring Ensures correct wheel spin direction 1 4g Steel Extrusion
15 Red Turning Wheel Turns main spindle 1 30g Plastic Injection molding
16 Guide clips for 09 Guides paper on 09 2 2.5g each Plastic Injection molding
17 Screw (3/32 x 3/8 long) Holds lever assembly together and spindle housing 2 <1g each Metal Machined
18 Lever Arm Connects spring to spindle 1 1g Plastic Injection molding
19 Spring Connector Connects two springs to lever arm 1 <1g Plastic Injection molding
20 Rounded Spring Guide Angles spring to desired measurement 1 <1g Plastic Injection molding
21 Thin Paper Guide Guides paper out of device 1 24g Plastic Injection molding
22 Front Spindle Housing Final housing before paper leaves device 1 132g Plastic Injection molding
23 Spindle Housing Back Back of spindle housing 1 162g Plastic Injection molding
24 Spindle Housing (L) Left of spindle housing 1 105g Plastic Injection molding
25 Spindle Housing (R) Right of spindle housing 1 105g Plastic Injection molding
26 White Spindle Guide Holds spindle in line 3 2.3g each Plastic Injection molding
27 Screw (3/32 x 3/8 long) Connects spindle halves 2 <1g Metal Machined
28 Square nut For use with 27 2 <1g Steel Cast and drilled
29 White Teeth Guide/Arm Guides cutting teeth in spindle 2 3g each Plastic Injection molding
30 Cutting Teeth Cuts paper towel 1 75g Steel Cast, punched and bent
31 Spindle Top Holds cutting tool 1 125g Plastic Injection molding
32 Spindle Bottom Holds cutting tool 1 135g Plastic Injection molding
33 Metal Key Helps open housing 1 5g Steel Punched

DFMA Analysis


Design For Manufacture

Design For Assembly

FEMA 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 Fractured text text text text text text text text text
02 Front Housing Clip Fractured text text text text text text text text text text
03 Front Housing Tab Fractured text text text text text text text text text text
04 Rear Housing Fractured text text text text text text text text text text
05 Paper Towel Holding Arm text text text text text text text text text text
08 Screw Anchor Fractured text text text text text text text text text text
09 Paper Guide Tube Failed text text text text text text text text text text
10 Spring (uneven hooks) Broken text text text text text text text text text text
11 Spring (even hooks) Broken text text text text text text text text text text
13 Red Screw Cap Fractured text text text text text text text text text text
14 Locking Spring Broken text text text text text text text text text text
15 SRed Turning Wheel Failed text text text text text text text text text text
16 Guide clips for text text text text text text text text text text
18 Guide clips for text text text text text text text text text text
19 Spring Connector text text text text text text text text text text
20 Rounded Spring Guide text text text text text text text text text text
21 Thin Paper Guidetext text text text text text text text text text
22 Front Spindle Housing text text text text text text text text text text
23 Spindle Housing Back text text text text text text text text text text

DFE Analysis


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