6706 l2u214 powerpoint_1

Level 2 Diploma in Bench Joinery

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Explain characteristics of timber-based manufactured boards

Unit 214: Manufacture bench joinery products

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Manufactured boardsAims of session

• Identify commonly used man made boards

• State the standard board sizes

• State typical uses of specific boards

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Why man made boards? Why not natural timbers?• Stability

• Strength properties

• Availability of natural resources

• Time required to manufacture products from wide boards in natural timbers

• Workability of some natural timbers

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What design requirements/functional qualities do we need from MMBS? • Stability

• Structural properties

• Surface finishing / appearance

• Water resistant?

• Fire resistant

• Workability

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Commonly used man made boards - Particle Boards (chipboard)Made from young spruce, pine & fir trees, saw mill & machining waste, & synthetic adhesive

Chipboards• Chipboard (interior)• Moisture resistant (green)• Fire resistant (pink)

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Commonly used man made boards - Fibre boards Hardboards

• HardboardOil laminated Hardboard (MR)Pre-decoratedSurface laminatedEmbossed (textured)Pegboard (perforated)

Medium Density Fibreboard

(medite) www.willamette-europe.comMDF (internal/standard)Moisture resistant ExteriorFire resistant High Density

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Commonly used man made boards - MDF & Americahttp://www.lhc.org.uk/members/pubs/factsht/46fact.htm

Rumours that medium density fibre board (MDF) is banned in the USA are untrue. Emissions of formaldehyde from board products are, however, regulated in the USA and Germany, and are expected to be regulated throughout the European Community (EC) in the future.

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Commonly used man made boards - Orientated Strand board (OSB)http://www.josbdone.co.uk/how_its_made.php

• OSB/1 General purpose boards, and boards for interior fitments (including furniture) for use in dry conditions

• OSB/2 Load-bearing boards for use in dry conditions

• OSB/3 Load-bearing boards for use in humid conditions

• OSB/4 Heavy duty load-bearing boards for use in humid conditions

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Commonly used man made boards - PlywoodPlywood is normally constructed of odd number of thin veneers glued together with the grain laid at right angles to the adjoining

This ensures the outer veneers are in the same direction

Fixing close to the edge is possible without breakoutVarious timbers are used in the manufacture of ply including, Beech, Douglas fir, Gaboon, Parana pine, Birch etc.

Level 2 Diploma in Bench Joinery

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Plywood - Types/ grades

• Interior

• Exterior (WBP weather & boil proof)

• Marine

• Sheathing (shuttering plywood)

• Sheathing (Unsanded)

• Good two sides (sanded)

• Good one side (sanded one side)

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Other plywoods

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Task 1We have discussed particle boards, Ply and OSB. Can you discover one more type of manufacture board?

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Manufacturing plywood

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Manufacturing plywood

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Task 2Discover the manufacturing process of the other man-made boards discussed.

- Provide a description of each process

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Any questions?