Daily maintenance and care of extruder

(1) Daily maintenance is a regular routine work that does not occupy the
equipment operation time and is usually completed during the startup period. The
focus is on cleaning the machine, lubricating the moving parts, tightening the
loose threaded parts, and timely checking and adjusting the motor, control
instruments, working parts and pipelines.

(2) Regular maintenance is generally carried out after the extruder has been
running continuously for 2500-5000 hours and then stopped. The machine needs to
be disassembled for inspection, measurement, and identification of the wear of
the main parts, and the parts that have reached the specified wear limit are
replaced and the damaged parts are repaired.

(3) It is not allowed to run the machine empty to avoid the screw and machine
barrel from rolling.

(4) If an abnormal sound occurs during the operation of the extruder, it
should be stopped immediately for inspection or repair.

(5) Prevent metal or other debris from falling into the hopper to avoid
damaging the screw and barrel. To prevent iron debris from entering the barrel,
a magnetic attraction component or a magnetic frame can be installed at the
material feeding port where the material enters the barrel. To prevent debris
from falling into the barrel, the material must be screened in advance.

(6) Pay attention to the cleanliness of the production environment. Do not
allow garbage and impurities to mix into the material to block the filter plate,
affect the product output, quality and increase the resistance of the machine
head.

(7) When the extruder needs to be stopped for a long time, anti-rust grease
should be applied to the working surfaces of the screw, machine cylinder,
machine head, etc. Small screws should be hung in the air or placed in a special
wooden box, and leveled with wooden blocks to prevent the screw from deformation
or damage.

(8) Regularly calibrate the temperature control instrument to check the
correctness of its adjustment and the sensitivity of control.

(9) The maintenance of the reducer of the extruder is the same as that of the
general standard reducer. It is mainly to check the wear and failure of gears,
bearings, etc. The reducer should use the lubricating oil specified in the
machine manual and add oil according to the specified oil level. Too little oil
will not lubricate and reduce the service life of parts; too much oil will cause
high heat, high energy consumption, and easy deterioration of oil, which will
also make the lubrication ineffective and cause damage to parts. The sealing
gasket (ring) should be replaced in time at the oil leakage part of the reducer
to ensure the amount of lubricating oil.

(10) The inner wall of the cooling water pipe attached to the extruder is
prone to scale and the outer surface is prone to corrosion and rust. Careful
inspection should be carried out during maintenance. Excessive scale will block
the pipe and fail to achieve the cooling effect. Severe rust will cause water
leakage. Therefore, descaling and anti-corrosion cooling measures must be taken
during maintenance.

(11) For the DC motor that drives the screw, the brush wear and contact
should be checked in particular. The insulation resistance value of the motor
should also be measured regularly to see if it is above the specified value. In
addition, check whether the connecting wires and other parts are rusted, and
take protective measures.

(12) Designate a person to be responsible for equipment maintenance. And
record each maintenance and repair in detail and include it in the factory
equipment management file.

www.jinhanmachinery.com
Jinghan Machinery (Dongguan) Co., Ltd.

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