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.

Installation of Extruder

The principal machine of extruder is the heaviest equipment in the whole system, and also considering the main motor, thus it is demanded highly to the bearing capacity of foundation. The extruder cannot be directly put onto foundation during installation, it is required to underlay a frame, which is made of channel steel according to the size of extruder base, at the bottom of equipment base, and use the expansion bolt to fix with foundation. Ensure the plainness of the whole frame when making the base frame, especially the principal machine base and the mo tor base must be at the same plane. This is especially important for the extruding machine with driving device of elastic coupling directly connected with reducing gear box.



Because the main motor and the reducing gear box are directly connected with a drum type coupling, it is necessary to ensure the coaxiality between the output shaft of main motor and the input shaft of the reducing gear box during installation. Comparatively, it is convenient to adjust the position of main motor for adjusting the coaxiality.

The coaxiality between the two shafts can be also ensured by lying channel steel under the extruder.

Muyang Chaoyue SWFP Series Fine-grinding Hammer Mill

"Chaoyue" Series Fine-grinding Hammer mills can be used for grinding various granular feedstuffs, such as corn, sorghum, wheat, crumbled oil meals and etc. They are applicable for grinding granular raw materials in various large- and medium-sized livestock feed mills, alcohol plants, citric acid plants, food factories and cooking oil mills.

With advanced design of water-drop shaped grinding chamber and structural configuration for regrinding, it is good for increasing the machine's capacity. Optimized array of hammers makes the capacity higher. The design for air supplementing in axial direction effectively destroys the circumfluent material layer, it is of the benefit of grinding and screening, and it also do good to bearing cooling. Various accurate detection instruments including dynamic balancing device with high precision ensure much smoother running, lower noise level and more perfect performance.

The rotor on the hammer mill which is capable of both coronation and reversion greatly increases the service life of wearing parts. With the movable full-size access door and interlock device ensure safety and operational convenience. The coupled screen holding-down mechanism makes the screen segments be replaced conveniently and reliably. Equipped with the feeder of either advanced converter impeller type or automatic type, the grinding machinery works more reliably. The gap between hammers and screen can be adjusted to suit the highly efficient grinding of different materials. In order to bring the performance of the hammer mill into a full play, it is recommended that the feeding inlet size shall not be over 8mm and material moisture content shall not be more than 16%.

Safety Points While Operating the Grinding Machine

It is prohibited to open the operating gate until the grinding machine has been fully stopped; the safety mechanism of the access door is equipped with a locking cylinder for prevention of opening and a proximity switch for prevention of starting up after the door is opened. Do connect the electric circuit and air piping as required, ensuring that the cylinder locks the access door when the equipment is running, and the door cannot be opened until the equipment is stopped absolutely, and the equipment cannot be started up when the access door is opened.

It is forbidden to approach the rotating components by finger during running of the grinding machinery. The inspection, maintenance and cleaning work can only be done after the pulverizer rotor has been completely stopped.

If the coupling bolts between the convex cover and the grinding chamber and between the discharge outlet and the air pipe are not removed, do not pull the handle of the manual hydraulic pump so as to avoid any damages of the equipment.

When choosing the grinding machines with a hydraulic opening mechanism, it is a must to ensure there is no leakage at joints of each pipe, to avoid any danger due to pressure loss during operation. Customers should not adjust the guiding counterbalance valve at will, so as to avoid possible dangers.

When using the hydraulic opening mechanism to open the top cover for repair, do not turn the unloading valve of the manual pump at will, so as to avoid personal injury resulted from falling of the top cover.

Before power cut-off, do not open the junction box of the motor, so as to avoid personal injury resulted from electric shock. Set the rotating direction for the motor strictly according to the rotation direction indicating mark, so as to avoid any damages of the equipment.

Prevent tramp metals or other foreign sundries from entering the grinding chamber, so as to avoid any damages to the hammer blades and geared rings.

Introduction on Extruding Principle

Firstly, the materials prepared and pulverized enter the feeding bin for bridge-breaking and are to be processed. When working, the feeder of the extruder continuously feeds the material in bridge-breaking feeding bin to the different diameter cylinder conditioner for conditioning, adds evenly, the continuous and metered steam, water and other liquids into conditioner while material is entering into it.

The material being conditioned for a certain period enters the feeding section of the extruding assembly for extruding, the material is conveyed from the feeding section, and the feeding section on the extruding machinery is mainly used for conveying the material to kneading section and primarily compressing the material; in the kneading section, the material will be gradually ripened or dissolved through strong stirring, mixing and cutting; the pressure and temperature will rise gradually after entering the final ripening section, and the material will be ripened further, the starch will be gelatinized further, the fat and protein will be modified and homogenized to form a non-crystal texture; finally, the material will be extruded and cut into shapes through the discharging assembly.

Three sections of extruding assembly can be adjusted as required by the production. The screw conveys the material to the whole expanding chamber, the mechanical energy of rotating screw will be transformed as heat energy through abrasion between material and parts of the extruder as well as internal abrasion of material. The rotating speed of the extruding screw is adjustable, and therefore, it is possible to adjust the extruding effect during the process according to processing requirement, so as to control the product density and ripeness.

When material is extruded to pass through the die holes in the end of the extruding machine chamber, doughy material will be processed to a certain shape. Because of the great push and mix of screw in the machine chamber, a certain pressure and temperature will be formed in material, so that the material will expand greatly when extruded from the die holes or when most of water is evaporated momentarily or lightly expanded because less water is lost. This can be realized through strictly control each operation parameter as required.

During production, material will be greatly expanded and kept in a corresponding shape and dimension depending on structural features of material.

Safety Program for Pellet Mill

The pellet mill gate of is provided with a limit switch (1) and a clamp handle (2). When closing the gate of the pellet mill and bringing along the clamp handle, the contact of the limit switch will be pressed by a clamping plate (3) to give a signal to the control circuit for closing the gate, and then the pellet mill may be start end up. The pellet mill cannot be started up as shown in Fig 0.1.

When there is any hard foreign matter entered the pelletizing chamber or when the material flow rate is too high, the pressure between the press rollers and the ring die will exceed the normal working pressure, and then the friction resistance between the press rollers and the ring die will increase.

1. The rotor will drive the main shaft to rotate since the press rollers are installed on the main shaft and the ring die is installed on the rotor.
2. When the torque of the main shaft reaches a certain design value, the sheer force of the safety pin on the safety pin disk installed on the rear end of the main shaft exceeds the sheer force limit of the safety pin, thus the safety pin is sheared off.
3. At this time, the main shaft is rotating and drives the limit switches to act, thus stopping the motor of pelleting machine.
4. The main shaft must be reset and the safety pin must be installed again before restart.

A by-pass door is provided at feeding inlet of pelletizing chamber of pellet mill, if the speed of feeds into ring die is too fast and the feeds deposited are excessive and the motor load increased exceeds the rated value, the pneumatic device will open automatically the by-pass door, the feeds will be discharged from by-pass door; after the motor load is reset normally, the by-pass door will be closed automatically and the machine will continue to operate, see Fig 0.3.

The magnetic separating device between the discharging outlet of the conditioner and inlet of the pellet mill gate is effective for removing iron impurities mixed in materials to protect the ring die and press rollers from damage.

Muyang "Chaole" SWFL82B Vertical Pulverizer

SWFL82B vertical ultra-fine pulverizer is a new type of equipment for large-, medium- and small-sized feed mill to process various coarse ground materials after preliminary cleaning, magnetic separation and mixing, such as corn, sorghum, rice, wheat, soybean meal, fish and shrimp, so as to obtain the materials in superfine particle size as required. It is especially suitable for micro-grinding or superfine-grinding of feeds for prawn, turtle, eel and young animals.

Features of the product
1. It is characterized by compact structure and small floor space.
2. It is a structure without any sieve, both grinding and grading are put in the same closed space, so that the grading can be finished one time and the energy loss due to over-grinding can be reduced.
3. With a pneumatic opening mechanism, the grinding chamber can be quickly opened and ease of maintenance.
4. The grading system on the grinding machinery is an optimized design with high grading efficiency.
5. The particle size is uniform and adjustable, and the temperature of materials is lower by means of aspiration and pneumatic conveying.
6. The ground particle size of 60-200 mesh is continuously adjustable, so t he special requirements of ultra-fine pulverizer can be fulfilled.
7. A special silencer is equipped, which can greatly reduce noise.
8. Particular anti-bridging feeding device can protect feeding materials from bridging.
9. It runs stably with little vibration.
10. It is provided with temperature and speed indicators which can trace the actual running status of the pulverizer.

Working conditions
1. The ultra-fine pulverizer should be installed in basement or on the ground floor with ambient temperature of -5℃~40 ℃.
2. The ultra-fine pulverizer should be technologically matched with former and back equipment.
3. The working voltage on the grinding machine should be stable with a deviation no more than ±5%.
4. The diameter of materials entering the pulverizer should not exceed 1mm, and the moisture content should not exceed 12%.

Muyang Steel Structure Engineering

Muyang specializes in the cost effective building of Steel Structures for churches, factories, warehouses, hangers, shopping centers and offices. And it offers an in-house detailing and architectural studio enabling itself to assist customers from the early design stages right up to the final construction of the steel structure engineering.

Most construction projects require the use of hundreds of different materials. These range from concrete of all different specifications, structural steel of different specifications, clay, mortar, ceramics, wood, etc. In terms of a load bearing structural frame, they will generally consist of structural steel, concrete, masonry, and/or wood, using an infinite combination of each to produce an efficient structure.

Most commercial and industrial steel structure buildings are primarily constructed using either structural steel or reinforced concrete. When designing a structure, an engineer must decide which, if not both, material is most suitable for the design. There are many factors considered when choosing a construction material. Cost is commonly the controlling element; however, other considerations such as weight, strength, constructability, availability, sustainability, and fire resistance will be taken into account before a final decision is made.

Structural Steel Fabrication has a new productivity champion in the Cutting Fabrication System. Its revolutionary technology brings automated 3D fabrication to processing beams, channels, HSS, angle, plate and bar. Every feature you see on the beam was made in a single pass by Muyang Group.

Muyang Business Scope:
1. Industrial factory building;
2. Multi-storey steel structure workshop, office building, civilian construction;
3. High rise steel structure building (residential houses, office building, etc);
4. Large span steel structure (airport, gymnasium, conference hall, etc);
5. Bridge and road;
Capability: design, manufacturing and installation of steel structure.