TYPES OF SIMPLE LEAVES

TYPES OF LEAVES

PARTS OF A LEAF

HOW TO PROCESS WOOD

The process starts with the extraction of the log (raw material) from the forest and ends with the production of planks.

STEPS

1. Cutting

2. Pruning

3. Transport

4. Removing the bark

5. Sawing

6. Drying

7. Planing

STRUCTURE OF A FLOWER

HARDWOOD Vs SOFTWOOD

	HARDWOOD	SOFTWOOD
DEFINITION	Comes from deciduous trees that drop their leaves every year.	Conifer trees have needles, normally do not lose them. Evergreen
EXAMPLES	Examples of hardwood are  teak, walnut, oak, ash, elm, poplar, birch, maple etc.	Examples of softwood trees are pine, spruce, cedar, fir, larch, etc.
COST	Hardwood is typically more expensive than softwood.	Softwood is typically less expensive compared to hardwood.
GROWTH	Hardwood has a slower growth rate.	Softwood has a faster rate of growth.
CHARACTERISTICS	Wide, round crown. Leaves are broad. Its fruit may be: nut, chesnut and berries.	Straight, slender. The crown is narrow. The leaf is a needle. The fruit is a  cone
COLOR	Dark	Light
STRUCTURE	Non - resinous and close grained	Resinous

TYPES OF COMPOUND LEAVES

JOINING PLASTICS

A.  TEMPORARY JOINTS

                    - Nut and bolt


                    - Standard screw


                    - Double ended screw



B.  PERMANENT JOINTS

                                                                                -  Adhesives

                 - Soldering

SHAPING AND FINISHING TECHNIQUES

                 We can use different tools and machines to finish the plastic objects that we have made.

                 Principal techniques are cutting, perforating, trimming and filling.


a. CUTTING
                          - Cutter
                          - Scissors
                          - Steel bit
                          - Coping saw
                          - Power saw (Jig saw)
                          - Power press
                          - Hot metal thread trimmer

b. PERFORATING
                    
                          - Drill bit

c. TRIMMING AND FILLING

                          - File
                          - Rasp

FORMATION TECHNIQUES OF PLASTICS

1. EXTRUSION

2. LAMINATION

3. VACUUM FORMING Vacuum forming

4. MOLDING
            - Injection Molding    Injection molding

            - Blow Molding Blow molding

            - Compression Molding through compression