SE-4000 Portable Eye Wash Spray Fixture - PowerPoint PPT Presentation

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Title:

SE-4000 Portable Eye Wash Spray Fixture

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Wes Doyle Nate Griffith Matt Jaskot Jason McKnight. Overview. Present the problem. State our goals ... Many parts high assembly labor costs. Significant room ... – PowerPoint PPT presentation

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Title: SE-4000 Portable Eye Wash Spray Fixture


1
SE-4000 Portable Eye WashSpray Fixture
  • The Speakman Company
  • University of Delaware Team
  • Wes Doyle Nate Griffith Matt Jaskot
    Jason McKnight

2
Overview
  • Present the problem
  • State our goals
  • Reveal the project constraints
  • Traverse the design process
  • Reveal the problem solution
  • Validate the problem solution

3
Existing design
  • Complicated and expensive brass valve
  • Many parts high assembly labor costs
  • Significant room for cost reduction in spray arms

4
Current Design Components
5
Sponsors Problem
  • High cost model in a low cost Market
  • Seeks to reposition eyewash at appropriate cost
    level

More Features- Higher Cost
Low Cost Commodity competition
6
Our Task
  • Reduce cost of Spray-Arm Assembly under 15
  • Maintain compliance with ANSI flow requirements

7
Sponsors Wants
  • Utilize existing tank tooling
  • Aesthetic appeal
  • Minimize changes to shipping container
  • One year Return on capital expenditure

8
ANSI Requirements
  • Minimum flow of 0.4 GPM for 15 minutes
  • Hands free operation
  • Nozzles protected from airborne contaminants
  • On to Off in 1 second or less
  • Nozzle at least 6 from nearest obstruction
  • Must not leak operate reliably every time
  • Both eyes flushed simultaneously at safe water
    velocities

9
Design Subsystems
  • 3 Subsystems Spray-Arms perform

- Regulation of flow on/off (valve) - Direction
of flow to users eyes (nozzles) - Attachment
to tank (threaded nut)
Any new design must perform these 3 functions at
low cost - Attachment to tank and flow direction
are relatively easy to do - Focus on flow
regulation
10
Concept generation
  • - Initial ideas for flow regulation

Ball Valve
Linear Valve
Snap-on Nozzle Caps
- Low-cost design easy to prototype quickly,
cheaply
11
Ball Valve Prototype
  • Estimated Cost 30 (ball valve expensive,
    assembly costs)
  • One Attachment Point, Low Strength
  • Ugly.

12
Pull-Off Caps Prototype
  • Estimated Cost Near 15 Target
  • Attached with Bolts / Screws (Stronger)
  • T-Handle Connected to Caps
  • Sharp Metal Edges
  • Plastic Molded Design
  • (it is a safety product)

13
Design changes
14
Design changes
15
Design changes
16
Design changes
17
Design changes
18
Design changes
19
Design changes
20
Design changes
21
Pull-Off Strap Design
  • Angled rubber strap
  • Allows for user to easily grab onto handle
  • Expensive to mold due to complex shape
  • Cheaper, effective alternative?

22
Pull-Off Strap Design
  • Straight rubber strap
  • Less expensive mold
  • Smaller surface area for user to grab onto
  • 6800 Tooling
  • 3.50 Piece price
  • Cheap, ergonomic alternative?...

23
Pull-Off Strap Design
  • Inverted rubber strap
  • Inexpensive
  • Prominent
  • Peeling effect
  • Other alternative?
  • Widen the space between nozzles for more room

24
Rapid prototyping/final design
  • Final Design
  • Rapid Prototyping using Stereolithography

25
Cost
  • Reduced Unit Cost
  • Cheaper materials
  • Fewer parts
  • Easier to assemble

26
Current/Proposed Design Comparison
27
Testing
  • Flow Requirements Met

28
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59
Manufacturing Concerns -Fixture
  • Molding method-Rotomolding
  • Accommodates short
  • production runs
  • Low tooling cost
  • compared to blow
  • molding
  • Tradeoff-High piece price

60
Molding Results
61
Route to finished product
  • Path forward to a marketable product
  • Packaging Customer Assembly?
  • Contour Precision measurements
  • Decals Removing current and replacing
  • Assembly Jigs
  • Handle Manufacturing

62
Now
Before
Future Development
63
THANK YOU
  • Questions?
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