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.

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.

Structure of Main Working Components on Paddle Mixer

The mixing machine consists of rotor, machine body, machine housing, speed reducer, upper cover, liquid application device, access doors, etc. The rotor is installed on the machine body through the two bearings (with pedestal) at the shaft ends. It is driven by the output hollow shaft of the reducing motor. A discharge gate is installed at the bottom of machine housing, whose opening or closing is controlled by pneumatic cylinders according to the mixing cycle. The access doors for cleaning and maintenance are on the upper part of machine housing. There are two feeding inlets on the top cover of the mixer for adding major materials and additives separately. The air-return mechanism is installed between top cover and the machine bottom.

① Rotor
The rotor on the paddle mixer consists of a main shaft, four paddle assemblies (each of which is made up by a group of big and small paddles of different angles and welded to the stay bar and bar bottom cover ), end covers and stainless steel sheets.

② Bearing and shaft end seal
The rotor is supported and installed on the machine body through the bearings at the shaft ends, and the seal at shaft ends is guaranteed by transparent cover, seal packing as well as gland.

③ Discharge gates and the control
The discharge gate of the feed mixer is connected to the shaft of discharge gate by the gate support arm, while the driven rocking lever (rocker arm) is connected to the shaft of discharge gate by key. The cylinder hinge is connected to the driving rocking lever which, on the other hand, is connected to the driven rocking lever through a connecting rod. When opening the gate, the piston of cylinder is retracted to drive the driving rocking lever rotate counterclockwise, while the driving rocking lever drive the driven rocking lever rotate clockwise through the connecting rod, so as to open the discharge gate. When closing the gate, the piston of cylinder is pushed to drive the driving rocking lever rotate clockwise, then the driven rocking lever rotate counterclockwise, till the three holes that on the driving rocking lever, the connecting rod and the drives rocking lever sight alignment, the gate is closed.

④ Sealing of discharge gate
There are sealing members surrounding the discharge gate frame at lower part of the housing. When the gate is closed tightly, the side of the discharge gate clings tightly to the silica strip on the sealing member, and the discharge gate is sealed by the compact silica strip to prevent material in the mixer from leakage.

⑤ Liquid application device (if optioned)
The liquid application system is installed above the top cover and consists of pipe and nozzles etc. Several nozzles are evenly distributed on the pipe. The liquid application system can be able to move up and down for easily cleaning and replacing nozzles. Muyang mixing machines are all with full equipments and the standard application amount is 2% for one pipe, please note in the contract if you have different requirement. When adopting the atomizing spraying nozzle, liquid will be sprayed out from nozzle in a segment shape through the compound effect of atomization and compressed air.

⑥ Protection device
Interlock safety device should be installed on the cleaning gate to ensure the motor cannot be started when the cleaning gate is opened, so as to prevent accident during working.

⑦ Air-sac blowing device (if selected)
Whether to switch on/off the nozzles for supplying compressed air on the pipeline is controlled by two pulse solenoid valve which are controlled by pulse controller. The compressed air spraying onto the rotor and trough continuously through the series nozzle on the pipeline inner the chamber, which will clean material residues away the mixer so as to minimize material residues in the mixer.

⑧ Air-return mechanism
The air-return mechanism is a filter pocket with a skeleton that used to connect the mixing chamber with ambient air. When feeding material into the mixer, the compressed air in the mixing chamber is released through the air-return mechanism into ambient air and balance the pressure in the chamber; when discharging, air pressure in the chamber is decreased, and ambient air is induced into the mixing chamber, and balances the pressure in there as well. Generally, it is unnecessary for the feeding machine to install the air-return mechanism if the opening on the top cover is connected to the exhausted system during feed mill installation.

Important Explanations on Muyang Machine

1. Documents
This Operation Manual and/or List of Spare Parts shall be provided to your working personnel in charge of operating and managing the equipment manufactured by Jiangsu Muyang Group. Therefore, it is very important to deliver these documents to them.

2. Acceptance of the goods
A check on appearance should be made immediately when the mixing machine is transported to the destination. If it is sure there is any damage caused during transport, a necessary claim procedure must be taken according to the supply contract. The repair expense shall be borne by relevant risk undertaker.

3. Storage
The equipment including grinding machine, mixing machine, extruder, pelleting machine, cannot be installed in predetermined place immediately, must be stored in a weatherproof place with facilities against external infringement in original packages. Any loss arising from storage shall be conducted as per the Contract.

4. Installation
The equipment and parts manufactured by Jiangsu Muyang Group shall be installed only by the trained technical personnel based on installation specifications provided together with the equipment.

5. Structure
If several structures are introduced in the documents provided, only the structures specified in Supply Contract shall be effective. We reserve the right of improvement before delivery.

6. Startup and commissioning
Startup and commissioning shall only be done by trained personnel. The operators shall know the instructions and operation regulations in provided documents before startup. Lubricating oil shall be filled before startup, such as oil for variable speed devices.

7. Accident prevention
The accident prevention rules in related documents must be well known and strictly obeyed. Jiangsu Muyang Group devotes to manufacturing machinery equipment according to the latest National Safety Standards and European Safety Standards (CE Certification Standards). Customers shall tell us the local safety rules before manufacturing. Additional expenses there from shall be borne by customers.

8. Maintenance/cleaning
Only professional persons can carry out maintenance and shall well know relevant stipulations in the documents provided by us. These stipulations are helpful for keeping the equipment in good condition, reducing wear and prolonging the service life. Cleaning shall be done according to relevant legal stipulations and explanations in the documents provided by us.

9. Quality guarantee
We are responsible for the quality guarantee specified in the Contract, but the precondition is: the real spare parts manufactured by Jiangsu Muyang Group shall be certainly used. Any losses caused by using the spare parts from other manufacturers shall not be borne by our Group. Any losses caused by improper operation or disobeying our operation regulations or wrong operation by untrained personnel shall not be compensated by our Group.

10. Education duty
The leaders of an enterprise owning the equipment from Jiangsu Muyang Group shall have the duty to allow the operators to know the operating instructions, and shall point out where the especial dangers are during operating these machines.

Operation Principle on MPJH Series Food Mixer

The rotor of the mixing machine is equipped with two paddles on each paddle-carrier rod, forming two circles of paddles (4 big paddles at special angles in the outer circle and 4 small paddles at special angles in the inner circle). The outer big paddles drive the materials to turn over leftward and rightward in the fast-flow zone and move in continuous circulars in the trough in all directions, keeping materials mixed evenly and rapidly under a strong convective mixing action; the small paddles also greatly increase the convective mixing at the slow-flow zone. In addition, the two circles of paddles can increase actions like diffusion, shearing and impacting mixing between material particles, so as to obtain fast mixing with high homogeneity.



Muyang MPJH series double-circle paddle food mixer consists of a rotor, a machine body, a reducing motor, a pneumatic discharging gate system, etc. The Overall structure is shown in following picture:

1. Top cover
2. Rotor
3. Machine body
4. Pneumatic device for discharge gates
5. Pneumatic control element
6. Motor and chain driving device
7. Access door