Latch and Hinge Design Review PREMCO Machine Co. Customer: Craig McDonald By: Kyle Westmoreland, Louie Mysse, Luke Rust, Vinnie DiBlasi

Design Requirements LatchHinge PREMCO Competitor

Musts Hinge Hinge Must have be reversible for left or right side attachment. Must have be reversible for left or right side attachment. Must carry a minimum load of 300 lb. per pair. Must carry a minimum load of 300 lb. per pair. Must meet 4 or 3 hole pattern of competitors. Must meet 4 or 3 hole pattern of competitors. Must have countersunk holes for ¼ in. screws. Must have countersunk holes for ¼ in. screws. Must reach offset height from flush to 1 ¾ in. Must reach offset height from flush to 1 ¾ in. Must be aesthetically to PREMCO. Must be aesthetically to PREMCO. Latch Latch Must have self closing action. Must have self closing action. Must meet hole footprint of competitors. Must meet hole footprint of competitors. Must be available with or without cylinder lock. Must be available with or without cylinder lock. Must have countersunk holes for ¼ in. screws., Must have countersunk holes for ¼ in. screws., Must have strike that ranges from flush to 2 ½ in. offset. Must have strike that ranges from flush to 2 ½ in. offset. Must have inside safety release mechanism. Must have inside safety release mechanism. Must be aesthetically to PREMCO. Must be aesthetically to PREMCO.

Shoulds Hinge Hinge Should reach offsets of 1 7/8 and 2 in. Should reach offsets of 1 7/8 and 2 in. Should be available with or without spring kit. Should be available with or without spring kit. Blades should be able to be lifted off of hinge. Blades should be able to be lifted off of hinge. Should be able to be cam, or non cam lift design. Should be able to be cam, or non cam lift design. Should use nylar bushings. Should use nylar bushings.

One Piece Insert Hinge Highlights Highlights Adjustable Inserts Adjustable Inserts Low Molding Costs Low Molding Costs 2 Blade Design 2 Blade Design

Two Piece Insert Hinge Highlights Highlights Adjustable Inserts Adjustable Inserts Low Molding Costs Low Molding Costs 2 Blade Design 2 Blade Design

Shim Hinge Highlights Highlights 2 Blade Design 2 Blade Design Shim Variability Shim Variability More Rigid Hinge Base More Rigid Hinge Base

Hinge Selection Insert Hinge Insert Hinge Pros Pros Single Base Single Base 2 Blades 2 Blades Internalized Spring Internalized Spring Cons Cons Large Insert Large Insert Longer Hinge Base Longer Hinge Base Shim Hinge Shim Hinge Pros Pros Internalized Spring Internalized Spring Simple Internal Mechanism Simple Internal Mechanism Cons Cons Longer Bolts Longer Bolts Difficult Reinstallation Difficult Reinstallation

Latch Design Mini PREMCO Highlights Mini PREMCO Highlights Sleek Design Sleek Design Few Moving Internal Parts Few Moving Internal Parts No Catching Objects No Catching Objects

Latch Design Conclusions Pros Pros Streamline Design Streamline Design Handle Flush with Door Handle Flush with Door Few Internal Parts Few Internal Parts Safety Release Mechanism Safety Release Mechanism Cons Cons Too Similar to Competitor Too Similar to Competitor

Development Needs Stress and Fatigue Analysis on Nylon Material Stress and Fatigue Analysis on Nylon Material Spring Material and Dimensions Spring Material and Dimensions Test Stand Design and Loading Test Stand Design and Loading DFMEA of Modeled Prototype DFMEA of Modeled Prototype Locking Mechanism for Latch Locking Mechanism for Latch Insert Hinge Design Restraint Insert Hinge Design Restraint

Milestones Summer 2005 Summer 2005 Finalize System Level Design Drawings…7/29/05 Finalize System Level Design Drawings…7/29/05 Build Prototype Test Stand……………....8/05/05 Build Prototype Test Stand……………....8/05/05 Final Design Review……………………..8/04/05 Final Design Review……………………..8/04/05 Fall 2005 Fall 2005 Detailed Drawing Design Review………..9/15/05 Detailed Drawing Design Review………..9/15/05 Detailed Drawing Package……………….9/30/05 Detailed Drawing Package……………….9/30/05 Prototype………………………………...10/7/05 Prototype………………………………...10/7/05