B. Automatic oiling system it can supply all points of lubrication or can be com
binned with manual oiling.
The oil in automatic systems can be distributed:
1. Through gravity,
2. Through splash,
3. Through wicking (such as cotton cord) or
All automatic oiling systems require the reservoir to be filled to a certain level with oil.
Wick fed systems range from small reservoirs (the wicking itself may serve as
reservoir) to more substantial cavities. The smaller the reservoir, the more often oil
will need to be added. Larger oil reservoirs of any system type may have marked
indicator levels, so that the operator can verify that enough oil is available in the
reservoir.
(previous topic: oiling sewing machine drawing )
Pressure lubrication systems may have sight windows or bubbles. A flow or splash of
oil seen through these windows or bubbles will indicate that there is likely a good
pressure of oil in the system. Pressure systems may also have adjustment needles or
valves to control the flow of oil to critical points such as the hook race.
Any system can have an oil return mechanism to recirculate oil and to prevent buildup
of oil in pockets from which it may leak or overflow. The oil return mechanisms can
be gravity flow, wicking, or both. Pressure systems may also incorporate a suction
return, operated by the same pump that supplies oil pressure.
Lubrication is necessary for the sewing machine maintenance but at the same time
lubrication may be the cause of oil stains in a garment.
To prevent the oil stains in a garment, an advance technology is used .On the basis
of that technology, we can divide the sewing machines into the following categories:
1. Sewing Machine with Lubrication
2. Semi Dry head Sewing Machine
3. Dry Head Sewing Machine
SEWING MACHINE (SNLS) WITH LUBRICATION:
The needle bar and thread take-up components are lubricated with the minimum
required quantity of oil.
For the hook section, the standard method of lubrication is employed.
SEMI DRY HEAD SEWING MACHINE
With the advanced dry technology of enabling operation without being lubricated, a
frame which does not need lubrication has been developed. It is provided with not
only a high-speed sewing capability, but also a safety feature for preventing oil
stains.
• The needle bar and thread take-up components are not lubricated.
• For the hook section, the standard method of lubrication is employed.
DRY HEAD SEWING MACHINE
As its designation indicates, the dry head type machine ensures convenience of use
by totally preventing the oil from staining the material being sewn. The machine
wholly Contributes to the improved quality of finished products.
The section around the needle bar, the thread take-up lever and the hook are not
lubricated.
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