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Ca I R

POLITECNICO DI MILANO Scuola del Design Design & Engineering

FINAL PROJECT WORK A.A. 2017/2018 DE1

GROUP 10 Edgar Esteban Nikoletta Papadogianni Andrea Giada Simioni Gabriele Viganò


CONTEXT

PROBLEM

WHAT IS IT

CAUSES

PRESSURE ULCERS

LOCALIZED DAMAGE TO THE SKIN AND UNDERLINE TISSUE

INTERFACE PRESSURE, SHEAR, FRICTION


USER ANALYSIS

FRACTURE

HIGH RISK PREGNANCY

OLD PEOPLE

COMMON POINT: LOW RISK ULCERS INCIDENCE

LOW

MEDIUM

VERY HIGH

HIGH


MARKET ANALYSIS

LOW TECH

HIGH TECH

BED STRUCTURE

DESIGN OPPORTUNITY


BRIEF

NEEDS

OBJECTIVES

CONSTRAINTS

TEMPORARY USE

POSITION ADAPTABILITY

SKIN PROTECTION

PRESSURE CHANGES

BETTER BLOOD CIRCULATION

BODY WEIGHT REDISTRIBUTION

LOW COST


CONCEPT EVOLUTION


PRODUCT DETAILS


DIMENSIONS AND PERCENTILE 95th PERCENTILE

5th PERCENTILE


STORYBOARD

POSITION

SECURE

CONNECT


STORYBOARD

SWITCH ON

MANUALLY SET

CUSTOMIZATION


USER INTERACTION SURFACE INFLATION


USER INTERACTION POSITION SETTING


USER INTERACTION CUSTOMIZE INFLATION

CUSTOMIZE INFLATION STATIC MODE

SETTING OF THE MODES

ALTERNATING/STATIC MODE

INFLATABLE CUSHIONS SELECTION


USER INTERACTION CUSTOMIZE INFLATION ALTERNATING MODE

LEFT SHOULDER


USER INTERACTION CUSTOMIZE INFLATION ALTERNATING MODE

BACK AREA


USER INTERACTION CUSTOMIZE INFLATION ALTERNATING MODE

RIGHT SHOULDER


USER INTERACTION CUSTOMIZE INFLATION ALTERNATING MODE

LUMBAR AREA


USER INTERACTION CUSTOMIZE INFLATION ALTERNATING MODE

BUTTOCKS AREA


USER INTERACTION CUSTOMIZE INFLATION ALTERNATING MODE

HEELS AREA


HOW IT WORKS

ALTERNATING MODE

60%

100%

STATIC MODE

max:100% med: 75% min: 50%


FLUID CIRCUIT

elbow 90 o

snap connection

valve

safety valve

filter

pump

6-ways manifeld

air reservoir/environment


PUMP SELECTION Criteria 1: Pdesign = 0.1 bar Criteria 2: Vdesign = 24.4 L Criteria 3: Compactness

MAGNET DRIVE GEAR PUMP FG400

Flow rate = 206,25 l/h

tfull inflation = 7.1 min


MATTRESS ASSEMBLY

TUBULAR STRUCTURE

CARBON STEEL


MATTRESS ASSEMBLY

BELTS SUPPORT


MATTRESS ASSEMBLY

INFERIOR FOAM

POLYURETHANE FOAM


MATTRESS ASSEMBLY

INFLATABLE CUSHIONS

FLEXIBLE PVC


MATTRESS ASSEMBLY

SUPERIOR FOAM

POLYURETHANE FOAM


MATTRESS ASSEMBLY

FABRIC COVER

POLYESTER


FEM ANALYSIS Framework Critical component: back element

Displacement analysis

dmax

≤

Length (mm) 3000 (mm)

≤ 0.24 (mm)

Von Mises analysis

F.S. = 17.14

>2


CONTROL UNIT ASSEMBLY

EXTERIOR SHELLS


CONTROL UNIT ASSEMBLY

PUMP/VALVES/TUBES


CONTROL UNIT ASSEMBLY

CONTROLLER CASE BUTTONS

AIR FILTER


CONTROL UNIT ASSEMBLY

MOUNTING OF THE SHELLS


CONTROL UNIT ASSEMBLY

BACK SHELL


PRODUCTION PROCESSES THERMOFORMING THERMOSEALING

INJECTION MOLDING


COLORS AND POSITIONS


Ca I R THANK YOU!

c-AIR project - Altiulcers Mattress  
c-AIR project - Altiulcers Mattress  
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