When operating a high shear mixer, accurately adjusting key parameters such as stirring speed and time according to the characteristics of the material is an important step to ensure the best mixing effect.
1. Adjustment of stirring speed
Understand the characteristics of the material:
Different materials have different viscosities, densities and shear sensitivities. High-viscosity materials require a lower stirring speed to avoid excessive shearing and material damage, while low-viscosity materials can appropriately increase the stirring speed to improve mixing efficiency.
Liquid materials can usually be sheared at a faster stirring speed, while powder materials may require a slower stirring speed to avoid excessive dust.
Choose the appropriate adjustment method:
Modern high shear mixers are usually equipped with frequency converters, which can adjust the speed of the stirring motor by changing the frequency of the power supply, thereby achieving precise adjustment of the stirring speed. This method has the advantages of a wide speed regulation range, high precision and good stability.
For some simple mixers, manual adjustment may be used, such as adjusting the transmission device such as the pulley or sprocket of the stirring motor to change the stirring speed. However, this method has low precision and is not convenient for remote control and automated production.
Some mixers are also equipped with automatic control systems that can automatically adjust the stirring speed according to material viscosity, temperature and other parameters to ensure the stability and consistency of the stirring process.
Adjust and observe gradually:
When adjusting the stirring speed, the speed should be gradually increased or decreased to avoid sudden changes that may cause equipment damage or uneven material mixing.
At the same time, pay attention to the mixing of materials and the operating status of the equipment, and adjust the stirring speed in time to achieve the best mixing effect.
2. Control of stirring time
Determined according to product properties and required emulsification results:
The stirring time of the high shear emulsifier should be determined according to the product properties and the required emulsification results. Generally speaking, the emulsification time of liquid materials is relatively short and can be completed between 5-10 minutes; while materials with a certain viscosity or viscosity require longer stirring.
Continuously adjust according to actual conditions:
During the stirring process, the stirring time needs to be continuously adjusted according to the actual situation to grasp the appropriate emulsification time. Reasonable stirring time can not only improve the stability of the product, but also improve the uniformity and emulsification effect of the product.
3. Other precautions
Safe operation:
When adjusting the stirring speed and time, you must comply with the safety operating procedures to ensure the safety of the operator. Especially when stirring at high speed, you need to pay attention to prevent material splashing or equipment loss of control.
Regular maintenance:
In order to ensure the normal operation and extend the service life of the high shear mixer, the equipment needs to be maintained and serviced regularly. Including checking the wear of the stirring blades, cleaning the residue inside the equipment, checking the connection of the electrical system, etc.
Experimental verification:
For new materials or new processes, it is recommended to determine the optimal stirring speed and time parameters through actual experiments. This can more accurately understand the characteristics of the materials and the performance of the mixer, so as to obtain the best mixing effect.
