Operating rules and precautions for the open mill:

1、 Purpose

Standardize equipment operation and maintenance to ensure the normal operation and extended service life of equipment, reduce maintenance costs, and improve production efficiency.

2、 Scope of application

Only applicable to the operation guidance of the open mill equipment produced by Lina Company

3、 Special Responsibilities

The equipment special operators and maintenance personnel designated by the user unit shall not violate regulations and operate the equipment proficiently, and shall supervise unrelated personnel to not approach or tamper with the equipment.

4、 Safety operation rules

1. Preparation before homework

Before opening the open mill, it is necessary to check whether the circuit (current and voltage, etc.), oil circuit (lubrication of reducer, bearings, etc.), water circuit, etc. are normal! Then wear leather wrist protection (gloves are strictly prohibited for work), wear a mask during mixing operations, absolutely avoid waist ties, belts, rubber, etc., and do not wear clothes for operation. Carefully inspect for any debris between the large and small gears and rollers. For the first drive of each shift, the emergency brake device must be tested to check whether the braking is sensitive and reliable (if it is a knee contact device, be sure to get used to touching the knee to the brake device). During normal operation

It is strictly prohibited to use emergency braking devices to shut down the vehicle. When two or more people work together, they must coordinate with each other and confirm that there is no danger before proceeding

drive a car.

⑵ When preheating and heating the roller, it is necessary to control the temperature rise speed, especially in the cold winter in the north. The outside of the roller should be consistent with the room temperature, and the inside of the roller should protrude

When high-temperature steam is introduced, the temperature difference between the inside and outside may be over 120 ℃, causing the roller stress to reach 130.0~I 50.OMPa, which exceeds the U.1=140.0MPa of cast iron. If the rubber material is added too early, under the superposition of lateral pressure, the roller will be very tolerant

Easy to be damaged. For safety reasons, the empty vehicle should be preheated while refueling and lubricating, and the temperature should be raised to or close to the set temperature

When feeding, it is necessary to emphasize to the operator.

Before feeding, the rubber material should also be checked. If there are hard metal impurities mixed, they should be fed into the rubber mixing machine along with the rubber, causing a sudden increase in lateral pressure,

It will cause equipment damage.

2. Key precautions for feeding and rubber mixing operations

Firstly, it is necessary to adjust the roller spacing of the open mill and maintain the balance of the roller spacing. If the adjustment of the distance between the two ends of the roller is not the same, it will cause the roller to be biased and easily damage the equipment. This is strictly prohibited.

⑵ It is customary to add materials from the power input end, but this is actually unreasonable. From the perspective of the bending moment diagram and torque diagram, the feeding should be done at

Speed ratio gear end. Due to the fact that the composite bending moment and torque at the transmission end are greater than those at the speed ratio gear end, it is easier to damage the equipment by first adding a large block of hard rubber material at the transmission end.

⑶ Of course, do not first add large pieces of hard rubber material to the middle section of the roller, where the combined bending moment is greater, reaching 2820 tons/centimeter.

The feeding amount should gradually increase, and the weight of the feeding block should not exceed the specifications in the equipment manual. The feeding sequence should be from small to large. As shown in the picture, adding large pieces of rubber material suddenly to the roller spacing can cause overload and rush out, which not only easily damages the safety gasket, but also, once installed

If the entire gasket fails, it will endanger the roller.

When operating, first cut the knife, then hold the glue with your hand. Do not forcefully pull or tug on the film before cutting it. It is strictly prohibited to throw one hand on the roller

If the rubber material jumps and is not easy to roll, do not press the rubber material with your hand while receiving it under the roller. When pushing materials, you must make half a fist, not allowed

Exceeding the horizontal line at the top of the roller. When measuring the temperature of the roller, the back of the hand must be opposite to the direction of rotation of the roller.

The cutting blade must be placed in a safe place (to prevent the cutting blade from entering the rubber material into the roller), and the cutting blade must be inserted into the lower half of the roller when cutting rubber. The cutting blade must not face the direction of one's own body. When making triangular packages, it is forbidden to operate with a knife. When making rolls, the weight of the film must not exceed the rated weight of the model.

During the operation of the roller, if the hot roller suddenly cools down, that is, when the roller temperature is found to be too high, sudden introduction of cooling water can cause damage to the roller under the combined action of lateral pressure and temperature difference stress. Therefore, cooling should be carried out gradually, preferably with an empty vehicle.

When debris is found in the rubber material or roller during the operation of the roller, or when there is accumulated rubber at the baffle rubber, bearing, etc., the machine must be stopped for processing. If the conveyor belt accumulates glue or malfunctions, it must also be stopped for handling. In case of sudden parking, the power should be cut off in sequence, and the water and steam valves should be closed. It is strictly prohibited to drive under load.

(9) It is prohibited to lean on or stand on the rotating parts of the equipment and the material tray; Do not transport objects above the running roller;

When pulling and pushing vehicles, pay attention to the surrounding conditions to prevent collisions and collisions with people. When loading, prevent overloading and overturning to prevent injury.

3. After the work is completed, turn off the normal switches for operation and heating, then cut off the power, close the water and steam valves, and clean the rubber material.

4. Be careful not to get burned when in contact with high-temperature areas.

5. When the moving parts and surrounding areas are blocked, do not insert your hands or iron rods into them, but use plastic rods to handle them carefully.

6. Stop the operation of the machine as soon as possible when it malfunctions, and do not make any claims on your own. Notify and wait for your company's maintenance personnel

Check and repair.

7. Prevent all factors from causing machine damage and work-related accidents.

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