Famsun MY265 User manual

MY265
Single Screw Extruder
Operation Manual
Prior to use, please read through this operation manual
carefully and keep it properly for reference in future.

Foreword
1. First of all, thank you for your purchace of FAMSUN MY series single screw extruder.
2. This Operation Manual is an important technical document for safe and correct operation of MY MY265
Single-Screw Extruder.
3. Prior to operation, please read this operation manual carefully and get to know the safety instructions,
performances, requirements for installation and operation etc. of this extruder in order to adroitly operate
and use this machine, therefore to create more benefits.
4. This machine must be operated in accordance with this Manual. Improper operation or breach of the
operation regulations will cause severe loss.
5. Following are Safety-Alert Symbols and signal words in this Manual.
6. Prior to use, please read through these marks for attention points, especially the marks for safety
attention ones.
7. Operation and maintenance personnel should read Operation Manual carefully before they carry out
the operation and maintenance of the equipment.
8. Keep the Manual in a place near the machine, so as to look it up at any moment.
9. Please operate and maintain this machine with thorough understanding of this Operation Manual.
10. Please contact our Company to purchase a new Operation Manual for this machine if the Manual is
missing or damaged.
11. If the machine is transferred to the third party, please pass this Manual along with the machine.
12. Attention, Following are some explanations about its usage and the warranty of this machine.
①Application: Extrusion of powdery and granular materials.
②Warranty item: Extruder body
③Warranty period: within 1 year after purchase of the equipment, except wearing parts.
[Note]:
(1)FAMSUN Co., Ltd. reserves the copyright of this document and related contents. The recipient of
this Manual shall recognize the copyright and shall not provide the document wholly or partially to
the third party without FAMSUN’s authorization in writing beforehand, and shall not use it for other
purpose.
(2) No further notification shall be given should the relative technologies and the parameters change.
(3) The foreign language version of this Operation Manual is translated based on the Chinese version
of this Operation Manual of FAMSUN Co., Ltd, therefore, in case of divergence, the Chinese
version of this Operation Manual shall govern.

CONTENTS
1 Safety instructions........................................................................................................................1
1.1 Environment conditions ............................................................................................................1
1.2 Description of warning signs ....................................................................................................1
1.3 Describtion of safety signs........................................................................................................2
1.4 Special instructions ...................................................................................................................7
1.5 Safety instructions in transportation, storage and installation ..................................................7
1.6 Safety instructions in operation, inspection and maintenance ..................................................8
1.7 Personal protection....................................................................................................................9
1.8 Explosion Protection: Precautions against Dust Explosion and Fire Hazard..........................11
1.9 Other safety precautions (environmental protection measurements)......................................12
2 General description ....................................................................................................................13
2.1 Application and adaptability ...................................................................................................13
2.2 Main components and working principle................................................................................13
2.2.1 Main components.................................................................................................................13
2.2.2 Working process...................................................................................................................13
2.3 Introduction to components of the equipment ........................................................................14
2.3.1 Feeding bin...........................................................................................................................14
2.3.2 Feeder...................................................................................................................................15
2.3.3 Conditioner...........................................................................................................................16
2.3.4 Principal machine of the extruder ........................................................................................18
2.3.5 Pipeline support....................................................................................................................19
2.4 Functions and features.............................................................................................................23
3 Specifications of the extruder.....................................................................................................24
3.1 Basic specifications.................................................................................................................24
3.1.1 Model description.................................................................................................................24
3.1.2 Main technical parameters ...................................................................................................24
3.2 Working conditions.................................................................................................................24
4 Transportation and installation...................................................................................................26
4.1 Transportation.........................................................................................................................26
4.2 Installation of the equipment...................................................................................................28
4.2.1 Installation of the extruder ...................................................................................................28
4.2.2 Installation of the bridge-breaking feeding bin and feeder ..................................................29
4.2.3 Installation of the conditioner ..............................................................................................29

4.2.4 Installation of the pipeline system........................................................................................31
4.2.5 Installation of belt pulley and V-belt ...................................................................................35
4.3 Electric installation..................................................................................................................36
5 Operations..................................................................................................................................61
5.1 Operation procedure of startup (auto-control mode) ..............................................................61
5.2 Shutdown operation ................................................................................................................65
5.3 Emergency stop and restart procedure....................................................................................66
6 Repair and maintenance.............................................................................................................67
6.1 Precautions for repair and maintenance..................................................................................67
6.2 Daily inspection and periodical inspection .............................................................................68
6.2.1 List of daily inspection items...............................................................................................68
6.2.2 List of periodical inspection items.......................................................................................69
6.3 Maintenance of mechanical parts............................................................................................70
6.4 Replacement of circulating lubricant ......................................................................................71
6.4.1 Specification of lubricant.....................................................................................................71
6.4.2 Oil drain and refill................................................................................................................71
6.5 Other lubrication points...........................................................................................................71
6.6 Adjustment items and method.................................................................................................72
6.6.1 Adjustment of configuration ................................................................................................72
6.6.2 Removal and installation of taper sleeve .............................................................................73
6.6.3 Replacement of bearing pedestal seals.................................................................................73
6.7 Malfunction and troubleshooting............................................................................................77
6.8 Tools for repair and maintenance............................................................................................78
6.9 Long-term out-of-service ........................................................................................................79
6.10 Exploded diagram of various parts .......................................................................................79
6.10.1 Feeding bin.........................................................................................................................79
6.10.2 Feeder.................................................................................................................................80
6.10.3 Upper-pass conditioner ......................................................................................................83
6.10.4 Lower-pass conditioner......................................................................................................84
6.10.5 Seal plate assembly of conditioner.....................................................................................87
6.10.6 Steam and water addition pipeline of upper conditioner ...................................................88
6.10.7 Steam pipeline of lower-pass conditioner..........................................................................89
6.10.8 Steam distribution pipeline ................................................................................................90
6.10.9Main motor and drive mechanism.......................................................................................90

6.10.10 Main bearing and accessories...........................................................................................91
6.10.11 Extruder barrel .................................................................................................................91
6.10.12 Screw assembly (seven-section configuration)................................................................92
6.10.13 Screw head assembly (six-section configuration)............................................................93
6.10.14 Extruder heads..................................................................................................................93
6.10.15 Lubricant oil way .............................................................................................................94
6.10.16 Cutting device ..................................................................................................................95
6.10.17 Cutting rotor.....................................................................................................................95
6.10.18 Steam pipeline system......................................................................................................96
6.10.19 Water pipeline system......................................................................................................97
6.10.20 Discharge device..............................................................................................................98
6.10.21Glass tube flow-meter .......................................................................................................99
6.10.22 By-pass.............................................................................................................................99
6.10.23 Pipeline by principal machine........................................................................................100
6.11 Spare parts...........................................................................................................................101
6.11 .1 Spare parts.......................................................................................................................101
6.11.2 Spare parts list..................................................................................................................102
6.11.3 Order form of spare parts.................................................................................................118
7 Appendix..................................................................................................................................119
7.1 List of documents with shipment..........................................................................................119
7.2 Contact information ..............................................................................................................119
7.3 FAMSUN MY 265 extruder (list of operation manuals) ......................................................120

1
1 Safety instructions
1.1 Environment conditions
Please install the equipment according to the following conditions for safe operations.
(1)Please install the equipment indoors according to following conditions:
．Ambient temperature range (-10～+40℃)
．Relative humidity range: 30～85%
．Altitude: less than1000m
．Make indoor clean and vented
．Ensure the equipment far away from the corrosive gas, inflammable and explosive gas as well as
steamy wet environment
(2) Power source: 220v/1ph/50Hz and 380v/3ph/50Hz or refer to the motor nameplate; Compressed
air pressure ≧0.6Mpa.
(3)To facilitate use, operation, maintenance and inspection of the machine, adequate clearances
around it shall be required.
The scaled diagram for installation, please refer to Fig.4-6.
(4) Please place the equipment level.
(5)The vibration by other complicated environmental conditions may not exceed12 mm·s-1.
1.2 Description of warning signs
(1) In order to well understand this Operation Manual, the safety warning signs are classified as
following.
(2) These warning signs have been set up according to the operating regulations and safety
precautions for the equipment. In order to avoid dangerous accidents, this Operation Manual also
includes detailed preventive measures. Please operate the equipment according to the instructions
based on sufficient understanding of the contents indicated by the warning signs.
Table 1-1 Description of warning signs
This sign warns: In order to avoid death and serious injury accidents, please
be sure to operate the equipment according to relevant stipulations of safety
instructions.
This sign warns: In order to avoid potential dangerous accidents and serious
injuries, please operate the equipment according to relevant stipulations of
safety instructions.

2
1.3 Describtion of safety signs
(1)Relevant safety signs are posted at the corresponding dangerous positions of the equipment to
personal safety.
(2)All the safety signs are indicated in Fig.1-1～Fig.1-12. On basis of good understanding of these
safety signs, install, adjust, operate, maintain and inspect the equipment according to the contents
indicated by these signs.
(3)Please place these safety signs near the equipment. Do not damage or cover the signs.
(4) When these safety signs have fallen off or been damaged, please replace them with new ones.
(5)If you want to order new signs, please kindly contact us.
Table 1-2 Safety signs used for this extruder
No.
Designation
Ordering code
Contents
1
Beware of electric shock
COMM65010010
Do not open the junction box until the power
supply is switched off
2
Beware of injury by
mechanical movement
COMM65010008
Do not open the access door when the machine
is in running and until it has been completely
stopped
3
Check the lubricant level
COMM65010023
Be sure to check the oil level of tank
4
prevent scald (high
temperature)
COMM65010007
Do not touch the machine with bare hand when it
is normally working
5
Do not remove the guard
COMM65010007
Do not remove the guard when the machine is in
running
6
No climbing
COMM65010013
Do not climb or stand on the equipment
7
Wear protective gloves
COMM65010015
Wear protective gloves when inspecting and
repairing the equipment
8
Maintenance to follow the
operation manual
COMM65010016
Maintenance according to Operation manual
9
Rotation direction of
double shafts
COMM65010006
Sign for rotation direction of double- shaft
10
Right-hand direction
COMM65010002
Right-hand direction sign
11
Left-hand direction
COMM65010001
Left-hand direction sign
12
Clockwise direction
COMM65010005
Instruction sign: Clockwise direction
This sign warns: In order to avoid minor and potential moderate injuries,
please operate the equipment according to relevant stipulations of safety
instructions.

3
Fig.1-1 Beware of electric shock Fig.1-2 Beware of injuries by mechanical movement
Fig.1-3 Check lubricant level Fig.1-4 Prevent scald (high temperature)
Fig.1-5 Do not remove the guard shield Fig.1-6 Do not climb or stand on the equipment
Fig.1-7Wearing protective gloves Fig.1-8 Maitenance to follow the Operation Manual

4
Fig.1-9 Double-shaft direction Fig.1-10 Right-hand direction sign
Fig.1.11 Left-hand direction sign Fig.1.12 Clockwise direction
The MY265 Extruder set can be divided into 4 elements: a feed bin, a feeder, a conditioner and a
principal machine. The required safety signs are posted on the corresponding positions of these four
elements, for detail see Fig.1-13～Fig.1-16.The arrow indicated in each box in picture refers to the
corresponding posted position and the number in the box represents contents in Table 1-2.
Fig.1-13 Posted positions of safety signs on principal machine

5
Fig.1-14 Posted positions of safety signs on the conditioner
Fig.1-15 Posted positions of safety signs on the feeder
4
1
5, 6, 11
5
5
6, 7, 8
2, 4
2, 4
2, 4
1
4
9
1
2
6
5, 12

6
Fig.1-16 Posted positions of safety signs on the feed bin
1
2
6, 7, 8

7
1.4 Special instructions
(1)The said equipment operators refer to all personnel who should participate in operation,
inspection and maintenance etc.
(2)The equipment operator must possess satisfactory understanding of the Operation
manual.
(3)The owner has the duty and obligation to educate all operation personnel with the
safety instructions of the Operation Manual for the equipment.
(4) While obeying all the safety instructions herewith, the users must comply with all other
safety regulations and stipulations to prevent accidents.
(5) All related employees should receive safety training. The enterprise management of
user should be in charge of the training and observe the national, local and company’s
other safety regulations.
(6)All the responsibilities for any accidents or damages to the equipment shall not be
borne by manufacturer and commission agent if the equipment is not operated according
to the Operation manual.
(7) Please install, use and operate the equipment correctly. Whoever taking off guard or
signs to destroy its function should be responsible for the safety consequences.
(8)In normal production, high pressure exists in the extrusion barrels and thus the
installation of the extrusion barrels must meet all the requirements to firmly connect the
barrels in theoretical way and practical application. However, accident such as “ejection”
out of the extrusion barrels or discharge device during production may occur due to
improper installation and screw fatigue. Therefore, no one is allowed to stand by the
extrusion barrels when extruder is in running.
(9)Any changes to the equipment shall not affect the functions and safety performances of
the equipment.
(10) Be sure to run the extruder under strict obeying all regulations for prevention of
accidents.
(11) If any accidents occur due to failure in obeying the stipulations of the
Operation Manual and the control system for FAMSUN equipment is not used as per
the conditions mentioned above,FAMSUN will deny any responsibility. If FAMSUN is
required to take such responsibility, we will reserve the right to investigate and affix the
liability of the party who is accountable.
1.5 Safety instructions in transportation, storage and installation
(1) The equipment must be placed and handled by professionals.
(2)Please use designated tools (steel cable, crane, hoist etc.) to lift the equipment
according to designated sequence and method.
(3) Authorized staff only for lift operation.
(4) In order to prevent serious injury accidents, no one is allowed to present under the

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equipment during hoisting.
(5)The capacity of hoisting tools should be more than total weight of the equipment.
(6)When the equipment is stored temporarily, please place the equipment at level and
keep a constant temperature and indoors clean.
(7) For transportation, it is not allowed to damage the equipment by packing. It should be
reported to the manager immediately in case of any machine damage and missing parts
during transportation.
(8)In installation, enough clearance should be allowed for future maintenance and
replacement of the equipment.
(9)Prior to installation, all machine parts must be kept in their original package. The
machine parts and packing boxes should be properly coveredand stored in places
sheltered from rain, sunlight and damp.
(10)The cover plate, protection hood or guard are usually installed and delivered together
with the machine. They can only be disassembled with tools. And the machines required
with the protection devices can never be put into work until such devices have been
properly installed.
1.6 Safety instructions in operation, inspection and maintenance
(1)The operation, inspection, repair and maintenance of the equipment shall be carried
out only by the trained technical personnel according to applicable specifications
provided together with the equipment. Electric installation shall be performed only by
professionals according to relevant electric safety standards.
(2)For maintenance or repairing, the power must be cut off so as to prevent the motor
from unauthorized start.
(3)For operation, installation, repair and maintenance, please be sure to turn off and lock
the main power switch, and place the signboard at the workshop gateway, in front of the
electric control cabinet in the control room and near the extruder respectively, so as to
prevent the motor from accidental tripping.
(4) In operation, a special attention shall be paid to the positions with attached safety
signs.
(5)Do not operate when the safety protection device is off and access door is open. It is
prohibited to open the access door until the machine comes to full stop.
(6)If any trouble occurs in the access door or safety protection device, please repair or
replace them at once.
(7)The safety protection devices can never be dismounted, covered or bypassed at
liberty. They can never be opened until the machine has completely stopped. And the
machine can only be started when these safety protection devices are in good order.
(8)The feeding bin gate, feeder gate, conditioner gate, guard shield, cutting cart guard
shield and others may not be opened or detached, and it is not allowed to remove or

9
throw them away in the production! Otherwise, it will harm personnel safety. These
devices shall be repaired or replaced immediately when any malfunction occurs.
(9)When the machine is scheduled to stop, make actions to prevent the feed hopper, the
feeder, conditioner, principal machine of the extruder from being started by any
unauthorized start.
(10) Except the maintenance of the equipment, it is not allowed to take the guards off of
sprocket wheels and the two cylinders.
(11) When the safety guards or access gates are opened or the safety devices are
disassembled in order to inspect, adjust, repair and maintain the equipment or replace the
parts, required safety measures must be in place prior to such operations.
(12)When the machine is running, it is strictly forbidden to put fingers near the running,
components.Such work as inspection, maintenance and cleaning etc cannot be done until
the rotor of the extruder has been completely stopped.
(13) In case maintenance and inspection work should be done with a welder or other tools
that can generate sparks, take strict safety precautions against dust explosion and
combustion (see "Explosion protection").
(14)If the parts are damaged, please repair or replace them immediately.
(15)Ensure the safety of the electric system. Before the electric circuit is powdered off, it is
strictly prohibited to open the terminal box to avoid electric shock.
(16)The electric control system of the extruder must comply with following instructions.
Otherwise, the supplier will deny the technical safety responsibility.
①The electric control system of the extruder must be supplied by FAMSUN Co., Ltd.
②The equipment must be checked by an expert from FAMSUN before commissioning.
③The electric control is a part of the safety regulations for accident prevention.
④Prior to commissioning the control system must be tested by an expert from FAMSUN
according to the testing list and a permit will be signed off by the expert.
⑤If the control system for FAMSUN equipment does not go through the conditions above,
FAMSUN will deny any responsibility. If FAMSUN is required to take the responsibility, we
will reserve the right to investigate and affix the liability of the party who is responsible.
1.7 Personal protection
(1) All the mechanical equipment manufactured by FAMSUN Co., Ltd is equipped with
safety devices that are consistent with modern technical frontier and generally effective
safety rules prior to being shipped out so that the customers can use
the machines in accordance with the regulations.
(2) If the operators employed lack of communication skills, the owner has the
responsibility to explain to them clearly where dangers exist and warn them that special
attention should be exercised.

10
(3)In order to ensure safety and health for the workers during production process, it is
required to use personal protection equipment (such as gloves, breathing masks and
safety shoes) during operation.
(4) Please execute the special regulations on accident prevention in the operation manual
provided by FAMSUN.
(5) The enterprises are obligated to execute following regulations to ensure operators'
safety.
①The coupling guards must be mounted at any time and kept in place. It is very
dangerous when they are opened or dismantled to cause casualty accident. This is also
applicable to the preventive device of the robot.
②Keep the safety limit switches in good order. Do not bypass or discard the safety limit
switches.
③The drive motor must be switched off to absolutely stop the machine prior to inspection,
commissioning, repair and maintenance. This can be done through a full-phase cut-off
and lockable switch which is installed near the machine or on the operation desk or the
control panel on site. It is improper only to screw off the fuse wire!
④If the machine needs other energy like pneumatic, hydraulic, steam and hot water
energy, cut off the energy supply or turn off the switch and to release the pressure in the
internal pipeline system of the machine.
⑤As for handling heated or cooled parts and components of the machine, watch for the
danger of burning or scalding, frost-bitting.
⑥If you have pressed the emergency-stop switch to shut down the machine and you want
to reset the switch, it is not permissible to only re-press this button rather to turn on the
main switch to restart the machine.
⑦If some machines are equipped with a partial shutdown system, a special care should
be taken. Read the instruction manuals provided for the machine carefully. In such
machines with a partial shutdown system, temperature will rise because pressure or
vacuum will build up after they have been used for a while.
⑧Cleaning, lubricating and oiling of the machine or its parts and components may be
allowed only when the machine is not in running. If you have to climb on or enter the
machine to do such work, follow the rules positively without exception: surely cut the
power supply of motors and lock the switch with a warning tag attached. Meanwhile
climbing should comply with the related safety regulations.
⑨Be careful: never do sampling from inside of the machine unless there is not any danger.
Usually, take the samples from the pipe under the machine instead of inside of machine.
⑩Clean out the deposited dust, dirt and materials frequently. Keeping the machine clean
can enhance production safety and housekeeping level of workshop, and is also
beneficial to prevent dust explosion.

11
⑪In case of oil (grease) leakage, clean it up immediately and seal well the place where
leakage occurs. Oil or grease leakage on the floor will easily bring about hazards to the
operators.
⑫During operation, the machine must be equipped with safety devices, which may be
neither removed and abandoned nor reduced in functions. Otherwise, FAMSUN is not
responsible for any accidents resulted wherefrom and reserves the right to ascertain
where the responsibility lies.
1.8 Explosion Protection: Precautions against Dust Explosion and Fire Hazard
(1) General housekeeping
①Keeping the work place with combustible dust free is an important condition for safe production.
②Ensure not to pile bagged or bulk materials between machines.
③In order to reduce dust emission to surrounding areas, keep all conveying devices, air pipes, filter
bags in good condition without any leakage especially pipes and covers of the conveying devices.
④In order to reduce dust explosion hazard, dusts must be cleaned out frequently and effectively
everywhere.
⑤Keep all motors free of deposited dusts.
(2)Regular inspection and maintenance
①Check the safety devices such as speed monitor or the like apparatus regularly, at least once a
week.
②Check and clean the magnetic separator regularly, at least once a day.
③In order to avoid heat generation, it is necessary to regularly check the functions of all main shafts
and bearings, at least once a week, and to fill up with lubricant on regular basis..
(3)Electric apparatus
Regularly check the electric apparatus and articles with special care for the following:
①Do not use any flashlights and other lamps without shielding or explosion-proof glass.
②Do not use any cable extension or electric heater.
③Repair or replace the electric apparatus and equipment immediately if any failure
occurs.
④Do not install the cables directly on the floor.
⑤Cut off the power supply of the machine after work.
⑥Assign an electrician to check the insulation of all the power lines of electric network
according to relevant regulations, at least once a year.
(4)Smoking and welding
①No smoking. Such stipulation is applicable to all workers and staff of the enterprise as
well as guests, customers, outcomers and drivers visiting the factory.
②If the tools such as welding machine or soldering lamp (flame soldering lamp) etc. are

12
required for repair or installation, do as best as possible to arrange the work in a special
workshop or on a designated site.For occasional welding or the like work directly in
production area or warehouse, submit written applications to a correlated supervisor in
advance for written approval. Only can the above mentioned operations be carried out
when special safety measures have been taken, such as laying water soaked canvas or a
special fire-resistant canvas with fire extinguishers standing by. After completion of the
operation, monitor the welding site and the surrounding area for at least 10 hours.
④The torch cutting sparks are very dangerous. They can travel across through the narrow
clearance of walls and drop downstairs or to the next rooms, or even fly off 10m away in
distance. If the sparks drop in dusts, fire accidents may occur at any time.
⑤Welding is prohibited on a running conveyor. If the welding work is a must, shut down
the conveyor first, and then make a thorough cleaning and isolate both sides of the
welding site tightly with materials like mineral wool to avoid connecting with other
conveying devices, silos or tanks. If the chutes or conveying pipes require welding work,
disassemble them or disconnect their lower ends with silo or tank and seal them to avoid
welding sparks entering the conveying pipes or silos.
(5) Beware of static electricity
①To ensure the safety of electric circuits and avoid explosion resulted from spark
discharge.
②The paint coat at the electric connections must be removed.
1.9 Other safety precautions (environmental protection measurements)
If you decide not to use the machine any longer after it is used for a certain number of years
(about 8-10 years), take the actions for environmental protection and parts reutilization.
(1) Drain the liquids inside the machine (like motor oil, gearbox oil, brake oil and coolant
etc.) into special containers and send them to the designated workshop.
(2) Pick up the plastic parts for reutilization.
(3) Sort out the metal parts for special handling.

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2 General description
2.1 Application and adaptability
MY265 Single-Screw Extruder developed by FAMSUN Co., Ltd (hereafter referred to as
"extruder") is mainly used for processing floating and sinking feed in aquafeed industry
As for a pioneer application in new fields, please consult FAMSUN experts for further
technology support.
2.2 Main components and working principle
2.2.1 Main components
The mechanical equipment of extruder system is mainly composed of feeding bin, feeder,
conditioner, principle machine, and pipeline systemetc. See Fig. 2-1. There is electric control unit
besides the mechanical equipment.
1. Feeding bin 2. Feeder 3.Conditioner 4.Principal machine of the extruder 5.Pipeline system
Fig.2-1 General structure of the extruder
2.2.2 Working process
First of all, the materials prepared, blended and pulverized enter the feeding bin with
bridge-breaking device for further process. Then the materials in bridge-breaking feeding bin are
delivered by the feeder to the double-shaft differential-speed conditioner (DDC) for conditioning
where mixed with injected steady, continuous and metered steam, water, and other liquids.
The materials being conditioned for a certain period of time enter feeding section of the extruder
assembly for being conveyed from the feeding section, mainly used to convey and primarily
compress the materials, to kneading section; in the kneading section, materials will be gradually
cured or dissolved through strong stirring, mixing and shearing; meanwhile pressure and temperature
will further rise at the final curing section. As a result, the materials will be cured more; starch will be
gelatinized further; fat and protein will be denaturalized; and thereafter all get homogenized to form a
non-crystal texture. Finally, such materials will be extruded out and cut into shapes through the
discharging assembly.
1
2
5
4
3

14
2.3 Introduction to components of the equipment
2.3.1 Feeding bin
The feeding bin mainly consists of bin body, agitator, gasket, gear reducer and motor. See Fig.2-2.
1. Bin body 2. Agitator 3.Seal ring 4.Gear motor 5.Motor
Fig.2-2 Feeding bin
When the extruder is running, it is very important to ensure continuous and steady feeding of
materials. If the feeding is inconsistent, the extruder will run unsteadily, and consequently the quality
of expanded products will not be uniform. If feeding is cut off, it may cause blockage of the machine
and thus downtime. Because the raw materials of products for extrusion (especially the products with
small size) have small granularity and bad flowability, the bridging can be easily formed in the bin,
causing inconsistent and intermittent feeding. This bridge-breaking feeding bin is designed
specifically for resolution of such problem. For its main structure, see Fig.2-2.
The bin body is cylindrical and equipped with an agitator at the bottom to ensure continuous and
steady feeding to the next process.The bin has a certain capacity to provide the operator enough time
for troubleshooting in case of flow stop from the previous procedure.
The rotation direction of bridge-breaking feeding bin can be forward or reverse, and the rotation
direction of bridge-breaking tower should be in line with the discharge direction of the feeder.
Feeding
Discharging

15
2.3.2 Feeder
Feeder consists of sealed bearing, trough, screw, access door, chain driving system, variable
frequency connverter motor (or VFD). See Fig.2-3. The feeder is mainly used for quantitative feeding
of materials into the conditioner with variable-frequency controlled motor. The revolution can be
adjusted based on actual production condition. A cleaning door is located at its top part for easy
cleaning.
1. Bearing seal 2.Trough 3.Auger 4.Cleaning door 5.Chain drive 6.Convertor motor
Fig.2-3 Feeder
Parameters of the feeder are shown below: The length of feeder is selectable. If the feeder with
non-standard length is selected, its power will vary according to relevant requirements.
Table 2-1 Main technical parameters
Designation
Type
Motor power
Conveying capacity
Center distance between inlet and outlet
Feeder
TWLL24A
3kW
3～16 T/h
1700mm
Note: Motor power of the feeder changes with its length.
Material feeding
Material discharging