Muyang Automatic Feeder

This Muyang automatic feeder mainly consists of a box body, a feeding roll, an adjusting plate, a magnetic gate mechanism, an impurity discharging hopper and others, as shown in Fig. 1.

Working principle

The material enters the trough of the feeding roll from top and is brought to the material outlet through a rotary roll and an adjusting plate, therefore, the feeding is continuous and uniform. A plate magnetic separator is mounted near the material outlet and can remove iron impurity from materials.

The feeding amount can be automatically adjusted. The control principle is as follows: A sensor detects the working current of the grinding machine real time, and transmits the signals to the controller of frequency conversion motor of the feeder, and then adjust the opening of the adjusting plate and the rotating speed of the frequency conversion motor through comparison with set current, so as to automatically control the feeding amount.

Installation procedures, methods and attention points

For installing the principal machine of the feeder, flanges are all used for jointing the upper inlet with the gate and the lower outlet with the hammer mill. A soft connection is recommended and the machine body should be kept horizontal. After installation, the feeding roll should be checked whether it rotates in the box body flexibly without any hindrance.

It is recommended to hang the controller onto the wall in the power distribution room for the grinding machine, and the screen is about 1.6m apart from the ground, for the convenience of operation and maintenance.

The current transformer delivered together with the controller should be mounted in the power distribution cabinet for the grinding machinery, and any one of power lines L1, L2 or L3 for the grinding machine should pass through the mutual inducting coil.

Functional Inspection Prior to Test-run

Before leaving the manufacture plant, a perfect test-run has already been conducted to the mixing machine. The initial test run in the user's factory cannot be done until following checks have been conducted. There should be no abnormal contact inside the mixing chamber or between the other accessories. All connecting points must be checked carefully to ensure there is not any looseness. Check the rotors for flexible rotation, and make sure there is not any abnormal sounds resulted from blockage, collision or abrasion etc. Check the rotors for their rotating directions matching with that indicated, for this it may need to start the motor for a short time; meanwhile, check the motor for any change in its rotating direction.



Check whether the emergency stop switch is in good working condition or not, safety switch of the access door As a part of the safety control of the mixing machinery, whether the safety switch of the access door works normally or not is directly related with the safety of the mixer, so the safety switch should be frequently checked for its functioning. Check the discharge gate mechanism for flexible rotation. When opening or closing the gates, there should be no abnormal sounds resulted from blockage, collision or abrasion etc.

Before each commissioning or after each unexpected interruption, the residual materials in the mixer chamber must be emptied. Only when the access door is closed and other related equipment is running, the principal machine of the paddle mixer can be started, and do not feed materials into the mixer until the rotor is running normally. Inch the mixer to check for any abnormal situation. If any, correct it. The temperature rise of bearing should not higher than 35℃ when ideal running for 0.5h, and the lubricating and sealing function still perform well. Check the running condition of the motor, which should be consistent with that required in its instruction. Screws, fasteners and lubricating points should be checked for normal performance after ideal running for 1 hour.

Extruding Chamber and Feeding Device on Muyang PHG135 Extruder

Being an important part of extruder, extruding chamber is composed of main shaft, extruding screw rod, tapered pressure ring, wear ring and extruding sleeve. The extruding screw rod adopts segmental structure, equal diameter and variable pitch form to meet the demand for flexible assemble of different screw rods according to different raw materials. Configure the tapered pressure rings with different diameters to adjust and control the temperature and pressure in the chamber during extruding process. The extruding machine sleeve is composed of a feeding extruding chamber part, two middle extruding chamber parts and a discharging extruding chamber.

The feeding device on the extruding machinery is composed of mixing chamber, screw feeder, retarding mechanism and variable frequency motor. The rotating paddle type rotor prevents the blocking in feeding hopper. Using the infinitely variable speed screw feeder, can adjust the feeding speed flexibly to ensure the normal running of the extruder.

For some extruded fee (except extruded soybean), they must be cut into pellet feed with a certain length. The cutting device is composed of cutting knife and variable transmission. Control the cut length through the rotate speed adjustment of the cutting knife. The variable transmission adopts electromagnetic variable speed motor; the rotate speed can be adjusted in a range of 200-1200 r/M.

The dry-way extruder makes use of friction as the only source of the heat energy. It is entirely different from other getting heat energy methods, such as utilizing steam and other preheating device. The main parts of extruding machines are screw rod and extruding chamber, the material sprayed out from the outlet with the help of the heat energy and the high pressure, at this moment, the temperature and pressure has nosedived, the material will expanded due to the abrupt change from the high temperature and pressure to the normal temperature and pressure, the starch structure will be destroyed due to the evaporation of water, the expansion degree is related not only to the starch content but also the temperature, pressure and water content.

Muyang SJHS3 Double-circle Paddle Mixer

Thanks for purchasing Muyang SJHS3 Double-circle Paddle Mixer. This Operation Manual is an important technical document for the safe and correct operation of SJHS2A Double-circle Paddle Mixer. Prior to operation, please read over this operation manual carefully, well know the attention item for safety, different performances, requirements to installation and operation etc. of this mixer so that you able to adroitly operate and use this machine, and create more benefits.

This mixing machine must be operated in accordance with this Manual. Improper operation or breach of the operation regulations will cause severe loss. Prior to use, please read through this Manual and well understand the signal words, especially the DANGER points. Operation and maintenance personal should read carefully this Operation Manual prior to use and then carry out the operation and maintenance of the equipment.

Keep the Manual in a place near the mixing machinery, so as to look up it at any moment. Please operate and maintenance this machine with thoroughly understanding this Operation Manual. Please contact our Company to purchase a new Operation Manual for this machine if there is any omission or damaged of this Manual. If the machine is transferred to the third party, please over this Manual together with the machine. Attention, Following are some explanations about the application and the warranty of this machine.

1. Application: For mixing powdery and specific granular material.
2. Content of Warranty: Mixer body
3. Warranty period: within 1 year after purchase of the equipment, except wearing parts.

Muyang Superb Steel Structure

Specialized technical team: Muyang Steel Structure Co. employs over 100 engineers who specialize in the design of large-size industrial building, civil engineering, public utility buildings, special structure, and special steel structure buildings.

Meticulous product management ensures excellent product and projects. In order to create China's top-class structural steel fabrication line, Muyang has procured full range or capital equipment from Japan, USA, Switzerland, and Germany. This has provided mature fabrication processes and employs highly skilled workforce capable of excellent fabrication and meticulous quality assurance from all details.

Human Resources Management
Based on the people-oriented principle, Muyang has formulated a complete human resources management procedure and has developed an "Employee Development Plan", which is aimed promoting the development of each employee.



Recruitment
In order to maintain continuity of its technical competitive edge, Muyang Steel Structure Co. recruits mature technical staff from all over the world in addition to admitting fresh graduates from prestigious universities each year.

Employee Development
Muyang Business School contributes to the cultivation of specialized technicians, provides trainings targeted at different job requirements, and effectively heightens employee work-related skill and professionalism.

Excellent Performance Management
Since its founding in 1996, Muyang has stuck to its "excellence and efficiency" objective and has developed an effective management procedure.

Ring Die of MUZL 610TW Type Pellet Mill

It is essential to select ring die with correct material quality, structure, and dimension of die holes for improving the efficiency of the pellet mill. The ring die is usually made of forged material of high chrome alloy by vacuum heat treatment after being machined, and it is of good abrasion resistance and corrosion resistance.

Types of die hole structure of the ring die include:

Standard cylindrical holes
Holes with a conic inlet
Special die holes such as square holes, conic holes, and special number of holes

The ring die should be replaced as following procedures:
1. Ensure the power of the pelleting machine is cut off, the cutting knives are screwed off from ring die and the pelletizing chamber is opened before replacement.
2. Install the lifting device of the ring die to the lifting beam at the top of the machine body, ensure that the eye ring is fixed, and tighten the butterfly bolt to prevent the lifting beam from drawing out entirely.
3. Remove the rotary feeding cone and conic die flange.
4. Regulate the press roller to the place far away from the ring die.
5. Dismount the access door at both sides of the machine body so as to remove fastening bolts of the ring die.
6. Loosen the fastening bolts of the ring die
7. Screw in three top die bolts of ring die, and turn same number of turns by the wrench, thus the ring die can be ejected out of the driving flange.
8. Take out the whole ring die from the driving flange and place it on the press roller.
9. Lift the ring die by lifting device until pushing it wholly out of the pellet mill, scratching the surface of press roller should be avoided during this process.
10. Check whether the scraper on the front support is worn excessively or not after removing the ring die.
Installation of the ring die（see fig.2.4、2.5、2.6、2.7）：





The ring die should be installed as following procedures:
1. Turn off the power, adjust the cutting knives at a required distance to ring die for preventing the ring die.
2. The procedures for ring die assembling are contrary to the disassembling procedures.（for the details see as follows）.
3. Install the lifting device of the ring die to the lifting beam at the top of machine body and ensure that the eye ring is fixed, and then tighten the butterfly bolt to prevent the lifting beam from drawing out entirely.
4. Regulate the press roller to the place far away from the ring die.
5. Remove the access doors from two sides of the pellet mill, and screw the top die bolts into the bolt holes on driving flange of ring die.
6. Clean the end face, conic matching surface and inner surface of the ring die completely, and thoroughly clean the conic matching surface of driving flange of the ring die and end face of rotor.
7. Install the four centering pins to the ring die and then fasten it.
8. Fasten the tackle hook on the screw hole of the ring die and lift the ring die to corresponding installation height.
9. Move the ring die to the driving wheel flange, rotate the rotor to allow the centering pin of the ring die to align with the through hole of the rotor and ensure it is equally installed in the driving wheel flange of the ring die.
10. Fix the ring die with the nut, and then disassembly the lifting device of the ring die.
11. Screw in the other four fastening bolts for ring die and screw down them with centering-pin fastener of ring die by torque wrench on the cross in order. Refer to Fig. 2.8 and Torque List of Ring Die Fasteners for torque value.
12. The ring die must be assembled upright and aligned by dial indicator.
13. Screw the top die bolt slightly until it reaches the ring die.
14. Adjust the clearance between the three press rollers and the ring die properly（please refer to the section 2.3.8.4 for the adjustment of the press roll）.
15. Install cleaned feeding conic pulley fixing ring and rotation feeding cone to the outer end face of the ring die successively.
16. Install the access door at both sides of the pellet mill body.
17. Close the pellet mill gate.
18. Adjust the cutting knives to required distance from the ring die.

The ring dies of pelleting machines can be installed positively and reversely, however, it is suggested to install the ring die reversely in regular for operation such as after producing 1000 tons, so that the surface of the ring die and press rollers can be worn equably. It is recommended to use our fasteners for the ring die and apply lubricating oil or grease on the screws for a longer service life of the ring die when fastening.

Main Structure and Working Principle on Pellet Mill

This machine mainly consists of a feeder, a conditioner and a principal machine of pellet mill (mainly including a main motor, an assembly of rotors, a ring die, press rollers, an assembly of cutting knives, roller adjusting device, a lifting device for the ring die and a lubrication system) (Fig 2.1).



1. Principal machine of the pellet mill
2. Conditioner
3. Feeding auger
4. Driving unit of conditioner
5. Main motor
6. Motor of conditioner
7. Driving unit of feeder
8. Assembly of cutting knife
9. Lubricating system
10. Machine base
11. Rotor
12. Bearing at the rear end
13. Bearing at the front end
14. Inner scraper
15. Ring die
16. Assembly of roller
17. Deflector

The working procedure is shown as follows:

The mixed mash enters the feeding auger from the pelletizing chamber in a proper feeding amount through adjusting the rotating speed of the frequency control motor, and then enters the conditioner. The material will be sufficiently mixed with steam in the conditioner by stirring paddles of the conditioner, and molasses or oil can be added through the feeding inlet for molasses if necessary. The temperature of conditioned compound mash is normally controlled within 65~95℃ and the humidity 14~18% based on different formulas, and finally the material enters the pelletizing chamber and is pelletized to pellets by the press rollers and the ring die.