SDM

BRIEF

5 MAIN GOALS OF SDM

• TECHNOLOGY

HOW TO USE SDM TECHNOLOGY AND SKILLS SET UP

• SUSTAINABILITY

REDUCE CARBON EMISSIONS BY REPLACING EXISTING PROCESSES

• PERFORMANCE

NEW FITTING OF SHOES WITH SDM UPPER/BOTTOM PART

• MOM

PRODUCTIVITY IMPROVEMENT FOR MASS PRODUCTION

(SPEED, QUALITY, ETC.)

• ADDITIVE MOM

COMBINE WITH OTHER PROJECTS TO INCREASE THE EFFECT OF SDM

(DIRECT WINDING / VAC PAC)

vs.

IE ANALYSIS

WITH 3DP

Conventional SDM

(Streak LT 2)

SDM CYCLE TIME PER 0.5 PAIR

(0.5 PRS = 1 SET = 10 M/C)

# OF REQUIRED WORKERS

vs.

260

340

36 MIN.

# OF UNIT PROCESS

IE ANALYSIS

vs.

REQUIRED #OF M/C

(1 HEAD, 2,000 PRS, 1 SHIFT)

135

42

CARBON FROM MOM (CO2e kg/pr)

*1 M/C OPERATION @ VIETNAM

3750

vs.

0.3

2.11

TAKEAWAYS

• IE ANALYSIS RESULT IS OUR INITIAL BASELINE TO SET OUR ULTIMATE GOAL LATER.

SUMMARY : COULD REDUCE # OF PROCESS BUT NEED MORE TIME,

MACHINE AND ENERGY.

• CYCLE TIME IS ONE OF THE KEY DRIVERS OF SDM PROJECT. FOCUS ON HOW TO GO FAST WITH EXCELLENT PRINTING QUALITY.

• SDM SHOULD BE AN ENABLER FOR NEW DESIGN VALUES.

TAKEAWAYS

FIT TEST

SDM FEEDBACK

NEW LOOKING

GOOD MIDFOOT CONTAINMENT

LIGHT WEIGHT

FIT TEST

PLASTIC FEELING

STIFF IN FLEX ZONE

CHALLENGES / NEXT STEPS

CHALLENGES / NEXT STEPS

CHALLENGES

1. LONG CYCLE TIME

2. PLASTIC HAND FEEL

3. FUNCTION WITH SDM

NEXT STEPS

TO REDUCE THE CYCLE TIME,

1. OPTIMIZE THE PATTERN PATH

2. INFILL % TEST & PHYSICAL PROPERTY TEST

3. TRY WITH BIGGER NOZZLE

4. PARTIAL APPLICATION FOR ESSENTIAL PART

5. MULTIPLE HEADS IN PRODUCTION

TO IMPROVE PLASTIC FEELING AND GIVE FUNCTION,

1. TEST WITH SOFTER MATERIALS

2. STIFF FLEX ZONE - GIVE LESS DENSITY OF PATTERN AND APPLY GENERATIVE DESIGN

VIDEO

• SIZE : M9T
• CYCLE TIME : 3 HRS 20 MIN. / 0.5 PAIR
• MATERIAL : IU 002

VIDEO

CHALLENGES

1ST TRIAL : EVA FILAMENT PRINTING

1. EVA BLOWING : EVA SERIES, WHICH HAS A SYMPTOM OF THE EVA FILAMENT STICKING AROUND THE NOZZLE AS IT BLOWS IN THE NOZZLE.

2. INCONSISTENT FILAMENT THICKNESS : COMPARED TO THE 2.85MM TPU SERIES, EVA IS SLIGHTLY THICKER, SO THE MATERIAL IS JAMMED FROM THE INPUT PART OF THE EQUIPMENT TO THE COG-SHAPED CONNECTION PART.

CHALLENGES

2ND TRIAL : EVA PELLET PRINTING

DESIGN : FREE INVIGORATION (SCALE DOWN - TO CHECK WOKABILITY

NOZZLE TEMP. : 100 ˚C~110˚C

NOZZLE SIZE: 0.8mm

1. LONG CYCLE TIME

2. NEED BIGGER FUNNEL

3RD TRIAL : DMP

1. AIR BUBBLE AND PRINTING LINE EXPOSURE

2. INTERNAL STUDY IS POSTPONED

UNTIL CS HAS PELLET EXTRUDER

NEXT STEPS

FOR PRODUCTIVITY

1. NEED OPTIMIZED MACHINE CONDITION (SPEED, NOZZLE TEMP., ETC)

2. COLD-SHOT OUTLINE (3D PRINTING WORK) + UNIVERSAL INNER PATCH

FOR FINAL PART QUALITY CONTROL

1. AIR HOLE/ LINE EXPOSURE

INCREASE THE PART DENSITY BY REDUCING NOZZLE DIAMETER

VALIDATE DMP MOLDING CONDITION (TEMP., TIME, ETC.)

NEXT STEPS

PROCESS

1. PRINT TPU AND APILON ON TACO SOCK ON TACO JIG

2. CHANGE TO DROP-IN-MIDSOLE LAST

3. STEAM & COOLING

4. DELASTING & MIDSOLE DROP-IN SOCK

CHALLENGES / NEXT STEPS

CHALLENGES

1. DIRECT PRINTING MOM

2. BONDING ISSUE BETWEEN BASE MATERIAL AND PRINTED PART

NEXT STEPS

1. JIG FIXING WITH TOOL OR SCANNING

2. IMPROVE BONDING WITH FILM MATERIAL OR CHEMICAL APPLICATION

CHALLENGES / NEXT STEPS

CHALLENGE / NEXT STEP 2. BONDING GAP ISSUES

CHALLENGE / NEXT STEP 1. JIG POSITIONING