Veneer: A veneer is a
thin sheet of wood used in the manufacture of boards. It is usually sliced from
log.
Methods
of producing veneers
(i).Slicing Method: The method of using
slicing blade to cut off thin leaves from a particular log. Eg
.jpg)
(ii).
Reeling method: This is the method
of peeling log in a continuous rotary fashion mounted on a machine. The log is
usually soften through steaming first. Eg
.jpg)
(iii).Eccentric or Sawing Method: In this method the log is cut into quarters. It is
this quarter that is then sliced to veneer. Eg
.jpg)
Manufactured Boards
Manufactured boards are man- made boards made from multiple veneers, using adhesives, sawdust, etc. In Nigeria, the size of common boards is 2440 by 1220mm.
Types of Manufactured Boards
(i). Plywood: These are boards made from multiple veneers glued together with adhesives. The veneers are usually arranged so that the grains criss-cross each other. Eg.
(ii). Block boards: This board looks like a flush door. The inner part of this board contains a strip of timbers forming the core and covered with two layers of veneers. Eg
(iii). Laminated boards: These are boards used for high class veneer furniture. It contains a thinner strip of timber forming the core and glued together. The surface is glossy. Eg
(iv). Particle boards: These are boards made from wood chippings glued together and compressed under heat. It is used for paneling and kitchen furniture work.eg
(v). Hard boards: These boards are made from the combination of wood waste (sawdust in Nigeria) and bonded together under high temperature and compression.
Manufactured boards are man- made boards made from multiple veneers, using adhesives, sawdust, etc. In Nigeria, the size of common boards is 2440 by 1220mm.
Types of Manufactured Boards
(i). Plywood: These are boards made from multiple veneers glued together with adhesives. The veneers are usually arranged so that the grains criss-cross each other. Eg.
(ii). Block boards: This board looks like a flush door. The inner part of this board contains a strip of timbers forming the core and covered with two layers of veneers. Eg
(iii). Laminated boards: These are boards used for high class veneer furniture. It contains a thinner strip of timber forming the core and glued together. The surface is glossy. Eg
(iv). Particle boards: These are boards made from wood chippings glued together and compressed under heat. It is used for paneling and kitchen furniture work.eg
(v). Hard boards: These boards are made from the combination of wood waste (sawdust in Nigeria) and bonded together under high temperature and compression.
Advantages
of Manufactured Boards
(i). Using a manufactured board produces various large flat sheets of timber.
(ii). Manufactured boards do not check nor warp.
(iii). Manufactured boards can be worked on easily.
(i). Using a manufactured board produces various large flat sheets of timber.
(ii). Manufactured boards do not check nor warp.
(iii). Manufactured boards can be worked on easily.
A sample of Veneer
.jpg)
Different Types of Boards.
Class Work.
(i) What
is a veneer?
(ii) Explain 3 methods used for producing
veneers.
(iii).Write
short notes on how to produce 3 types of manufactured boards.
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