Panels & Furniture Asia May/June 2020

May / June 2020, Issue 3 | Panels & Furniture Asia WOOD CLINIC | 61
7. Drilling machine
- The setting of log mortises for the louvered door post and
the transom with the drilling machine must be based on the
specifications of the louvered door design drawing. The
operator must also check the accuracy of the mortises
regularly using a special mould to make sure the mortises
are n place.
8. Nail dowels
- Make sure the dowels in the upper, middle and lower
transoms of the louvered door are nailed as well as uniformly
glued and of the same height. Ensure strict control of the
quality of dowels and that the chamfering of both ends of the
dowel is in place to reduce the possibility of pressure
damage to the door post when assembling the louvered
door.
9. Colour matching of the louvered door components
- The color of the components of each louvered door and the
number of slats (tied in a bundle) should be allocated before
assembling the louvered door. It will improve the efficiency
of the louvered door assembly.
Figure 2: It is clear that there are some flaws in the louvered door
where some slats have become arched
4. Fixed length
- When the radial arm saw is used to cut the parts of the
louvered door, the most ideal sequence is to start sawing the
large louvered doors followed by smaller-sized louvered
doors. Make sure the saw blade is kept sharp and at a right
angle. If the linear speed of the saw is too high, it will lead
to rough and fuzzy surfaces. It is recommended to saw
the parts of the louvered door at an appropriate linear speed,
replace the saw blade and the bottom plate regularly to
reduce the burrs, thus reducing the puttying and hand
sanding work required afterwards.
5. Automatic louver slotting machine
- Set the inclination of the automatic louver slotting machine
and the specification of the milling slot according to the
louvered door design drawing. Check to make sure that the
milling cutter of the automatic louver slotting machine is
sharp, the clamping pressure of the fixed doorpost and the
accuracy of the milling slot are in place.
10. Louvered door assembly press
- Skilled workers are required to accurately set the template of
the louvered door assembly press. When arranging
components of the louvered door on the template of the
assembly press, it is necessary to make sure that the centre
lines of the components are on the same horizontal plane
without any dislocation. When assembling and pressing the
doors, the milling slot of the doorpost is often crushed or
the assembled louvered door is distorted if the centerlines
are not aligned.
- Two stages of pressing are required for the louvered door
assembly press. The first stage of pressing is to confirm that
the dowels of the louvered door transom are aligned with the
doorpost mortises, and that there is no misalignment
between the slats and the milling slot. The second stage of
pressing is to make sure that there is no gap between the
post and the transom of the louvered door, and for spilled
glue to be removed. This will be followed by pressure relief to
complete the assembly of the louvered door. It will also
reduce the repair work and improve the efficiency of the
louvered door assembly.
6. Wide-belt sander
- The wide-belt sander can be used to sand the planer tool
marks, burrs, putty and other imperfections on the flat
louvered door post, upper, middle and lower transoms
and the slat; the wide-belt sander can also be used for equal
thickness treatment.
(III) For the Nyatoh wood louvered doors in the finished product
warehouse that are presenting problems such as deformed
doorpost and weak gluing strength, possible causes and
solutions are provided as follows:
1. The door post of the Nyatoh wood louvered door is deformed