Low Price Rubber Open Mill / Rubber Mixing Mill Customized To Different Sizes

Product Specification

Low Price Rubber open mill / Rubber Mixing mill Can Be Customized To Different Sizes
 

Machine Introduction

 

The rubber mixing mill with a roller diameter of 450mm is a common rubber processing equipment. The following is a detailed introduction about it:

1. Basic structure:
- Roller: It is the core component of the mixing mill. 450mm refers to the diameter of the working part of the roller. The roller usually adopts a hollow structure to facilitate heating or cooling operations. The surface of the roller has been specially treated with high hardness and wear resistance to ensure that it can maintain a good working condition during long-term use.
- Frame: It is used to support and fix other components such as rollers and transmission devices to ensure the overall stability of the mixing mill. The frame is generally made of welded steel structure with high strength and rigidity.
- Transmission device: It is responsible for transmitting the power of the motor to the roller so that it can rotate at different speeds. Common transmission methods include gear transmission, chain transmission, etc., among which gear transmission has the advantages of high transmission efficiency and smooth operation.
- Distance adjustment device: The distance between the two rollers can be adjusted to meet different rubber processing requirements. The distance adjustment device usually adopts worm gear adjustment or hydraulic adjustment, which is labor-saving, convenient and reliable.
- Safety brake device: When an emergency occurs, the roller can be braked quickly to ensure the safety of the operator. For example, after pressing the emergency stop button, the mixing mill can stop running immediately.
- Heating and cooling device: used to control the temperature of the roller to meet the temperature requirements during rubber processing. The heating methods include electric heating, steam heating, etc., and the cooling method usually uses water cooling.
 

2. Working principle: When the mixing mill is working, the two rollers rotate relative to each other at different linear speeds. The raw rubber or rubber material is placed on the top of the roller. Due to the friction and adhesion of the roller surface and the bonding force between the materials, the rubber material is pulled into the roller gap. In the roller gap, the rubber material is subjected to strong shearing and extrusion, causing it to deform, thereby increasing the interface between the components and achieving distributed mixing. Through repeated mixing operations, the macromolecular chains inside the rubber are broken, and the various components in the formula can be mixed evenly to achieve the expected melt plasticization and mixing state.
 

3. Performance parameters:
- Roller linear speed: The linear speed of the front roller is generally around 18-25m/min, and the equipment produced by different manufacturers may vary. The linear speed of the roller will affect the mixing effect and production efficiency of rubber.
- Speed ​​ratio: The speed ratio of the front and rear rollers is usually around 1:1.27. The speed ratio is set to make the rubber receive better shearing effect between the rollers and improve the quality of mixing.
- One-time feeding amount: The one-time feeding amount is generally between 25-50kg. The specific feeding amount needs to be determined according to the type, formula and processing requirements of the rubber.
- Driving motor power: The power of the driving motor is usually between 45-75kW. The power determines the working capacity and production efficiency of the mixing mill.
 

4. Use:
- Rubber plasticization: reduce the molecular weight of raw rubber, increase its plasticity, and make it easier to process and shape.
- Rubber mixing: evenly disperse various rubber compounding agents (such as carbon black, sulfur, accelerators, etc.) into the rubber to improve the performance of the rubber.
- Hot refining of rubber: heating the plasticized or mixed rubber to increase its temperature evenly, improve the fluidity of the rubber, and prepare for subsequent processing.
- Rubber sheeting: pressing the refined rubber into a certain thickness of rubber sheet to facilitate subsequent molding.
 

5. Advantages:
- Simple operation: the structure is relatively simple, and the operator can master the operation method after a certain training.
- Strong applicability: it can be applied to rubber processing of different types and formulas, and can meet the various needs of rubber product manufacturers.
- Easy to observe: the open structure allows the operator to directly observe the rubber refining process, find problems in time and make adjustments.
 

6. Disadvantages:
- High labor intensity: the operator needs to manually add materials, turn over rubber and other operations, which has a high labor intensity.
- Poor working environment: during the rubber refining process, the rubber will produce a certain amount of dust and exhaust gas, which has a certain impact on the health of the operator.
- Relatively low production efficiency: compared with other rubber processing equipment such as internal mixers, the production efficiency of open mixers is relatively low.

Technical Parameters:
 

Safety operating procedures for rubber mixing mill:
 

I. Preparation before starting

1. Check whether all parts of the equipment are normal, such as whether the roller surface is damaged, whether the transmission device is flexible, whether the safety brake device is effective, etc.

2. Check whether the electrical system is normal and whether the display of each instrument is accurate.

3. Clean up the debris around the equipment to ensure that the working area is clean.

4. Adjust the roller spacing according to the process requirements.

5. Wear personal protective equipment, such as safety helmets, work clothes, gloves, etc.

II. Start-up operation

1. Before starting the main motor, make sure that there is no one and no obstacles around the equipment.

2. Start the main motor slowly and observe whether the equipment is running normally and whether there are any abnormal sounds and vibrations.

3. After the equipment runs smoothly, add rubber raw materials according to the process requirements.

III. During operation

1. The operator should stand in a safe position and it is strictly forbidden to put hands or other parts of the body into the roller gap.

2. When adding materials, they should be even and appropriate to avoid overloading the equipment due to excessive addition at one time.
3. Observe the mixing of rubber at any time. If any abnormality is found, the machine should be stopped in time for processing.
4. Maintenance, adjustment and other operations are strictly prohibited during the operation of the equipment.
5. In case of emergency, the emergency stop button should be pressed immediately to stop the operation of the equipment.

IV. Shutdown operation

1. After the mixing is completed, stop adding materials first, and then stop the main motor after all the rubber on the roller is discharged.
2. Turn off the electrical system and clean the equipment and work area.
3. Perform daily maintenance on the equipment, such as refueling, cleaning, etc.

V. Other precautions

1. Untrained personnel are not allowed to operate the equipment.
2. During the operation of the equipment, it is strictly prohibited for unrelated personnel to approach.
3. Regularly inspect and maintain the equipment to ensure that the equipment is in good working condition.
4. Strictly abide by the operating procedures and safety regulations of the equipment to prevent illegal operations.