Design & Manufacture 3G (OIP)

By Group H (2013):

Uvarajan M Velayutham; Tong Jing Kai; Jeremy Seah; Wang Cong; Vaizhnavi Chelvaraja

Accuhaler is being used as a means to deliver the dry powder medication required to prevent COPD (Chronic Obstructive Pulmonary Disease).

The current design being manufactured by Glaxo Wellcome Ptd Ltd, UK is:

Very complex to manufacture

Expensive

Cannot be reused.

DESIGNS PTE LTD

4 steps process,

hmmm….

Design: Based on correction tape

cartridge replacement method. The

3 gears within drives the

mechanism

Description: This design consist of

7 main parts. The critical parts will

consist in the cartridge which the

user disposes and replaces every

month.

Evaluation: The wastage of

material when replacing cartridge

is only reduced. User-friendly in

terms of replacing new medication.

Design: The original concept of using the

round magazine was streamlined into a

sleeker storage unit. The main working

principle still remains.

Description: 5 main parts with the critical

parts are the cutter and the top cover.

Evaluation: The cutter design on this

concept is not easy to manufacture and the

product was assembly unfriendly. Further

exploration has to be made if this design

was to be chosen.

≈ 95mm

For the mouth piece size, the team decided to take references

of the straw diameter size from Macdonald’s (as the minimum

range) and the current Accuhaler mouthpiece dimensions (as

the maximum range). (Top)

Tried holding prototype (left) among ourselves and found

it to be comfortable to hold

Design for EmbeddedCarbon Recycled materials will be used for packaging

Design for Recyclability majority of the product will be using the same

material making it easier to recycle

Design for Transport Efficiency Smaller product packaging allows more

products to be packed on pallets

Design for longevity By allowing the product to be reused we will be

decreasing the products thrown away after use

Criteria for the material selection: Medical grade approved Adequate supply of raw material Low cost for mass manufacture to be affordable Able to maintain the physical and chemical properties when the

product under 100+ degree steam environment for the disinfection & sterilization purpose, and able to serve the function under -0 degree environment for outdoor conditions.

Light weight with high yield strength

To accommodate injection molding, the part was split into 2 half.

The figure above

shows that the

prototype is

approximately the

length of a pen.

Fill time for half

the product is

1.03secs. Cooling

time is 98secs. The

clamp open time is

5secs. The cycle time

is 102secs.

Air traps are

found around the

corners of the part

but not major.

The quality prediction

is 66.3% high and 33.7%

medium. The team

suspects this is due to the

thicker region around the

yellow parts. There may

be quality problems

Weld lines are seen

scattered around the part.

However, these are only

formed in the indents

which forms the grip for

the cover.

The drop test carried out on the storage tube.

It can be seen that the thin regions of the part

at the bottom of the part is the contact plane for

the drop test.

It is still in the green zone which is below the

material’s failure limit.

Ulrich, K. T., & Eppinger, S. D. (2008). Product design and development. (4th ed., p. 211). New York: McGraw-Hill/Irwin.

Seretide 100, 250, 500 accuhaler. (2013, May 21). Retrieved from

http://www.medicines.org.uk/EMC/medicine/2317/SPC/Seretide 100, 250, 500 Accuhaler/

McDonald’s Corporation. 2012. McDonald’s 2012 Annual Report. [online] Available at:

http://www.aboutmcdonalds.com/content/dam/AboutMcDonalds/Investors/Investor%202013/2012%20Annual%20Repo

rt%20Final.pdf [Accessed: 9 Jul 2013].

Wedzicha JA et al. The prevention of chronic obstructive pulmonary disease exacerbations by salmeterol/fluticasone

propionate or tiotropium bromide. Am J Respir Crit Care Med 2008; 177:19–26

Uk spring stockist. (n.d.). Retrieved from http://www.springmasters.com/stocksprings.html

spring materials (round wire). (2011). Retrieved from http://springipedia.com/material-spring-materials.asp

Lee, C. (2009, June 09). Improving snapfit design (part 4). Retrieved from

http://articles.ides.com/design/2009/0608_snapfit4.asp

Boothroyd, G. (1983). Design for assembly handbook.

Fda approved plastic materials. (n.d.). Retrieved from http://www.professionalplastics.com/FDAApprovedPlasticMaterials

(2012). Single-cavity versus multi-cavity molding dispelling the myths. Newsboy, Retrieved from

http://www.boymachines.com/newsBOY22012.pdf