Paper towel dispenser

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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
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 [[Image:| 100x100px]]
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 [[Image:| 100x100px]]
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 Holds housings together Fractured text text text text text text text text text
03 Front Housing Tab Secures housing clip Fractured text text text text text text text text text
04 Rear Housing Holds mechanical components Fractured text text text text text text text text text
05 Paper Towel Holding Arm Holds paper towel roll Bent text text text text text text text text
08 Screw Anchor Holds screw in wall Fractured text text text text text text text text text
09 Paper Guide Tube Guides paper towel to cutting cylinder Failed text text text text text text text text text
10 Spring (uneven hooks)Holds 09 in place Broken text text text text text text text text text
11 Spring (even hooks) Holds lever to spindle housing Broken text text text text text text text text text
13 Red Screw Cap Hides screw in turning wheel Fractured text text text text text text text text text
14 Locking Spring Hides screw in turning wheel Broken text text text text text text text text text
15 SRed Turning Wheel Turns main spindle Failed text text text text text text text text text
16 Guide clips for 09 Guides paper on 09 text text text text text text text text text
18 Guide clips for 09Connects spring to spindle text text text text text text text text text
19 Spring Connector text Connects two springs to lever arm text text text text text text text text
20 Rounded Spring Guide Angles spring to desired measurement text text text text text text text text text
21 Thin Paper GuidetextGuides paper out of device text text text text text text text text
22 Front Spindle Housing Final housing before paper leaves device text text text text text text text text text
23 Spindle Housing Back Back of spindle housing text text text text text text text text text

DFE Analysis


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