What are the types of mixing blades for laboratory kneading machines?

Z-shaped mixing blade

Structural characteristics: The shape of the Z-shaped agitator blade is similar to the letter "Z", and it is usually divided into single Z-shaped and double Z-shaped. Its blades have a certain curvature and angle, which can fit well with the tank wall. This type of stirring blade is generally made of metal material, such as stainless steel, with a smooth surface that helps reduce the resistance of the material during the stirring process.

Working principle and effect: During the rotation process, the Z-shaped stirring blade generates strong shear force on the material. When the stirring blade rotates, it will cut open the aggregates of the material like a cutting tool, dispersing the material and allowing different components of the material to fully contact. For example, when conducting rubber mixing experiments in the laboratory, Z-shaped stirring blades can effectively tear apart the aggregates of rubber raw rubber and various additives (such as vulcanizing agents, accelerators, etc.), allowing the additives to be evenly distributed in the rubber raw rubber. At the same time, the Z-shaped stirring blade also exerts a certain squeezing and flipping effect on the material during rotation, promoting the circulation of the material inside the tank and further enhancing the mixing effect.

S-shaped mixing blade

Structural features: The shape of the S-shaped mixing blade resembles the letter "S", and its blades are usually continuously curved. The size of this stirring blade can be customized according to the size of the laboratory kneading machine tank. It is generally slender, but has sufficient strength to withstand the torque during the stirring process. The surface of the S-shaped agitator blade is also relatively smooth to reduce friction loss on the material.

Working principle and effect: The S-shaped stirring blade mainly produces a rolling effect on the material during rotation. Just like stirring soup in a pot with a spoon, it allows the ingredients to constantly change positions inside the pot. This rolling motion can achieve uniform mixing of materials under relatively mild shear forces. In some experiments that require high structural integrity of materials, such as mixing experiments containing larger particles or fibrous materials, the S-shaped stirring blade can avoid excessive damage to the material structure. For example, in food experiments, using an S-shaped stirrer to mix jam containing fruit pulp particles can evenly distribute the fruit pulp particles in the jam without crushing them too finely.

Dual planetary agitator

Structural features: The dual planetary agitator consists of two agitator blades, which revolve around the central axis inside the tank while also rotating on their own. The structure of this stirring blade is relatively complex, requiring high installation accuracy and transmission system. The blade shape of a dual planetary agitator can take various forms, such as curved blades or blades with special angles, and the blade shape and size of the two agitator blades are usually the same to ensure that they have a balanced effect on the material during motion.

Working principle and effect: The unique motion of the dual planetary agitator allows it to cover every corner of the tank. During the process of revolution and rotation, the two stirring blades cooperate with each other to stir and knead the material in all directions. They can generate shear forces, extrusion forces, and friction forces in multiple directions, allowing materials to be thoroughly mixed and kneaded. When preparing high viscosity materials in the laboratory (such as the synthesis of certain polymer materials), the dual planetary stirring blade can effectively mix various raw materials evenly and form complex flow patterns in the tank, which helps to improve the uniformity and efficiency of the reaction.

Dispersed disc agitator

Structural characteristics: The dispersing disc agitator is usually a flat disc-shaped structure, with some small holes or protruding structures on the disc surface. It is installed on the mixing shaft and functions by high-speed rotation. The diameter of the dispersing disk depends on the kneading machine tank body and actual usage needs. Generally, it is necessary to ensure that it can be stirred in a suitable position inside the tank body without excessive friction with the tank body wall.

Working principle and effect: When the dispersing disc agitator rotates at high speed, it generates strong centrifugal force. This centrifugal force throws the material out towards the tank wall, creating a high-speed circulating flow of the material inside the tank. During this process, the material is subjected to strong shear forces, especially in the area between the edge of the dispersing disk and the tank wall. The mixing paddle of the dispersion plate is mainly used for experiments that require rapid dispersion and fine mixing. For example, in the preparation experiment of cosmetics lotion, it can quickly disperse and mix the oil phase and water phase, making the particle size of lotion smaller and more evenly distributed.

Anchor type agitator

Structural features: The shape of the anchor type mixing blade is similar to an anchor, which is tightly attached to the inner wall of the tank. The propeller blades are usually wide and can cover most of the area near the tank wall. The structure of this stirring blade makes the gap between it and the tank smaller, but it does not come into contact with the tank wall, avoiding friction damage. Anchor type agitator blades are also made of metal materials, and their edges may be specially rounded to reduce scratching of the material.

Working principle and effect: Anchor type agitator blades are mainly used for stirring and mixing high viscosity materials. During the rotation process, it can scrape off the material on the tank wall, preventing the material from accumulating and burning on the wall (if there is a heating process). At the same time, it produces a relatively gentle stirring effect on the material, mainly pushing the material to slowly rotate inside the tank, allowing the material to mix under its own gravity and the push of the stirring blade. When conducting experiments on the preparation of high viscosity ointment in the laboratory, the anchor type stirring blade can slowly and evenly mix the ointment ingredients in the tank, without damaging the texture of the ointment due to excessive shear force. What are the materials for the mixing blade of the laboratory kneading machine