Barecore
sengon wood for barecore
Barecore is intermediate product in the modern woodworking industry. Barecore
is a wood panel made from pieces of wood that is glued and laminated together. Barecore in the woodworking industry is widely
used to make panels for finish product such as: furniture, cabinets, flooring or other
woods panel products. Barecore is an ideal core substrate for the
plywood or wood veneer panel. Barecore
is another alternative to replace the m.d.f. or particle board in the
woodworking industry. Wood veneer from the exotic
wood such as can be laid on the barecore in the one side or both side to make
wood veneer plywood. The other
material such as: decorative paper, vinyl or melamine also can be attached on the barecore panel to make engineered panel. If needed, the layer of slice wood also can be used
to make wood panel with more wood looked appearance. Compared with the m.d.f. or particle board the barecore has some advantages.
It is stronger, light and more wood looked. With the right
process and selection of wood
materials the barecore is cheap and stable. The barecore
with thicker size is also can be used to make wood component.
Sengon wood to make barecore
Although barecore can be made from pieces of wood from the wastes from other woodworking industry, but most barecore factories produce its product with special wood. The Sengon wood is the most used to make barecore. Sengon which is inexpensive, light, and easy to be handled, is very ideal to make barecore. The sengon wood is has very short life time. With a suitable climate and the right plantation system, the timber can be harvested at 5 year age. The culvitation of the senogn wood is easy make the wood is abundant. Some areas in Indonesia such as: Magelang, Temanggung and Wonosobo are the well known as sourced of the sengon timber. In this area there are many sengon barecore or plywood and industries as well as the sengon plantation.
The process to make barecore is very simple. The woodpieces in the similar sizes are laminated and glued together to form wide and big panels. The size of the barecore is usually the similar size with plywood, m.d.f. or particle board although any other special size are also can be produced. As other woodworking product, the drying of the wood is very important. The wood pieces must be completely dry before laminated. The m.c. timber 8% is recomended. The gluing process and the environtment condition may bring the mc or the barecore product to about 10 %. But the higher moisture content is should be avoided since the risk of the wood movement.
The drying
process for the wood for barecore can be done quickly. The wood for barecore does not require very good quality such as wood
for furniture industry or other woodworking industries. Some small defects such
as cracked or warped that is not be
accepted at the wood furniture industry is not problem in the barecore product. Barecore
only requires small sizes wood pieces
that are dry. If the sengon wood is used, then drying
time can be done
within 5 days or even less, very short time compared
with the other wood-drying
process for hardwood.
The gluing process are other important thing to be considered. The glue will
emit the gas in its drying process. The gas emition
will affect the barecore panel quality. Some states require certain VOC
limitation for their
product. And to fullfill that we need the proper glue. The gluing
process can be done with hot press
and cold press and both each provide its advantages
and disadvantages.
The laminated wood panel needs the sanding process to make
flat and even surface barecore panel. The wide belt sander sanding machine
is used to do the sanding process. After a flat surface is obtained then the barecore should be stacked
and wrapped to keep its moisture content. The barecore panel at the open surface will tend to absorb
water from its surrounding air
and risk to get problem since the wood swelling and shrinking. See the our previous article: wood moisture on the plywood
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