Techniques of product design are being discussed in this presentation

1. PRODUCT DESIGN
Arooj Zaidi

2. BAMBOO
 Member of grass family
 Comprising of rhizome
 Hollow stem ( partitioned at the nodes) called
cane
 Nodes and internodes

4. BAMBOO & ITS RAPID GROWTH
 Certain species grow more than a metre per day
 Certain species grow more than 3 metre per day
 Reach height of thirty metres and diameters of
35 cm.
 Rapid growth helps in soil erosion
 Renewable source
 Greenery in barren land

5. BAMBOO ASSEMBLY/JOINING
 Ligatures alone can be use
1. Friction tight rope connection
 Traditionally natural materials like bast, strips of bamboo
,hemp, are used as
the rope in connecting bamboo poles. Nowadays, iron wire
and plastic tapes/ropes are also used for friction-tight rope
connection.

6. 
Pros and Cons:
· Pros:
1) It is easy to build and simple for bamboo manufacturing.
2) It can be very strong with sufficient lashing techniques.
3) It can almost serve all the circumstances we need in building with
bamboo.
4) It can drastically reduce the possibility of bamboo cracking because no
notches or holes are in need in making such connections.
5) It is easier for sealing because we can apply epoxy or other materials as
a coating.
· Cons:
1) It will cost more bamboo materials.
2) The choice of rope material is another critical consideration.
3) The rope may be damaged by moisture, rot, insect, etc.
4) It requires some skills in doing lashing work.

7. PLUG-IN/BOLT CONNECTIONS
this can be seen in garden
fences and furniture.
Pros and Cons: Pros:
1) It can provide a prettier appearance
of the connection.
2) It does not need complicated
lashing techniques.
3) The connection can stand huge
forces if use a bolt/metal nail
appropriately.
· Cons:
1) Drilling or making a hole on
bamboo poles can cause cracking and
splitting.
2) Other materials like timber pin/bolt
are needed, which will increase the
cost.
3) The connection may be weak in
tension in the vertical direction owing
to shear problem.
4) It increases the difficulty in
manufacturing, i.e., drilling, making
wedge, etc.

8. POSITIVE FITTING CONNECTIONS
 Positive fitting
bamboo connections
are widely used in
traditional bamboo
buildings and other
products like bamboo
ladders and furniture.

9.  Pros:
1) It will create a prettier appearance for bamboo products.
2) It can be easily combined with other construction techniques,
such as plug-in technique, lashing technique.
3) It is easy for sealing because small gaps can be found on the
surfaces.
· Cons:
1) It requires two bamboo poles in different diameters.
2) Making a hole on bamboo poles will drastically reduce its
strength, and can cause cracking and splitting.
3) It calls for skillful manufacturers and also profession
equipments.

10. PROCESSING

11. CUTTING

12. REMOVAL OF MATTER
 The cutting stroke has a tangible thickness :
cutting by
 Band saws
 Circular saws
 Oscillating saws
 Abrasion
 Water jet
 Laser
 Ultrasound
 flame

13. SAWING
 Angle of attack
 TPI
 Set
 Cutting tool
 Speed of rotation

14. BAND SAW
 Band of toothed steel
 Roughly cut items
 Straight & contoured cuts

15. CIRCULAR SAW
 Cutting tool is toothed disc
 Cut precisely
 Only straight edges no contouring
 Either the saw move or
 workpiece move