SJ25/30 single screw Extruder small Laboratory Extruder

One of the most notable features of the SJ25 laboratory extruder is its ability to offer precise control over several key parameters in the extrusion process, such as temperature, screw speed, and pressure. This precision allows researchers to fine-tune their material formulations and extrusion conditions to achieve optimal results, making it an ideal choice for experimental purposes.

The machine is equipped with advanced digital controllers that allow users to monitor and adjust each heating zone along the barrel. The precise temperature control ensures that the polymer is consistently heated to the correct processing temperature, reducing the risk of material degradation during extrusion. Furthermore, adjustable screw speeds and torque control provide the flexibility to process different materials and achieve specific material properties.

The SJ25 laboratory extruder is designed to occupy minimal space, making it an excellent solution for laboratories or facilities with limited room. Despite its compact size, the machine is equipped with all the necessary components for high-quality extrusion, such as a well-engineered barrel, a powerful motor, and an efficient heating system.

The extruder’s small footprint ensures that it fits easily into a laboratory setting without compromising on performance. It also makes the machine highly portable, which is beneficial when the machine needs to be moved between different workstations or departments.

The SJ25 laboratory extruder is capable of processing a wide range of thermoplastic materials, including PVC, PE, PP, PS, PET, and other engineering plastics. This makes it a versatile tool for a variety of applications, from material testing to small-scale production. The extruder can handle materials in pellet, powder, or regrind form, which gives users the flexibility to experiment with different feedstock types.

Whether used for basic research or complex material development, the SJ25 extruder is versatile enough to meet the needs of various industries, including automotive, packaging, and medical applications.

The SJ25 laboratory extruder supports interchangeable dies, allowing users to produce different profiles such as pipes, sheets, films, and rods. This die-swapping capability is especially useful for testing various product designs or producing samples for product evaluation. The ability to quickly change dies ensures that the extruder is adaptable to different projects without the need for multiple machines.

Custom profiles and geometries can be created depending on the research or production needs. This feature is particularly beneficial when working with novel or custom materials that require unique extrusions.

Once the material is extruded and shaped, it needs to be cooled and solidified quickly to maintain its desired dimensions. The SJ25 laboratory extruder is equipped with an efficient cooling system that rapidly cools the extruded material, preventing deformation and ensuring dimensional accuracy.

Depending on the material being processed, the cooling system may include air cooling or water bath cooling. The cooling rate can be adjusted to suit the requirements of the specific material, enabling users to control the solidification process to achieve the desired mechanical properties in the final product.

The extrusion process begins when raw material, typically in pellet form, is fed into the hopper. The material is then conveyed into the barrel through a rotating screw. The screw, which is equipped with a special design to ensure optimal material flow, compresses and melts the polymer as it moves along the barrel.

The feeding system ensures that the material is consistently supplied into the barrel, avoiding blockages or irregular flow. This is crucial for maintaining a steady extrusion rate and ensuring that the material is processed efficiently.

Once inside the barrel, the material is heated to its desired processing temperature. The SJ25 laboratory extruder has multiple heating zones along the barrel, each of which is controlled independently to ensure even and precise temperature distribution. The digital controllers allow the operator to set the ideal temperature for each zone based on the material being processed.

The screw, which rotates and moves the material along the barrel, provides the mechanical energy needed to melt the polymer. The rotation of the screw also ensures that the material is adequately mixed, resulting in a uniform melt. This step is essential for producing high-quality extrusions and avoiding defects in the final product.

Once the polymer is melted and thoroughly mixed, it is forced through the die, which shapes the material into the desired profile. The SJ25 laboratory extruder can be equipped with a variety of dies to produce different shapes, including pipes, sheets, films, and rods.

The die is a critical component of the extruder, as it directly determines the final dimensions and surface finish of the extruded material. The ability to change dies allows users to create a variety of profiles for testing or production purposes. The extrusion speed can be adjusted based on the material and profile being produced.

After the material exits the die, it is quickly cooled to solidify its shape. The SJ25 laboratory extruder features an efficient cooling system that helps to rapidly cool the extruded material, preventing warping and ensuring the material retains its dimensional integrity.

The cooling system may include air or water cooling, depending on the type of material being processed. The cooling process can be controlled to suit the specific requirements of different polymers, ensuring the extruded product maintains the desired mechanical properties.

Once the material is cooled and solidified, it is cut into the desired length for testing, analysis, or further processing. The SJ25 laboratory extruder is typically equipped with an integrated cutting system that ensures precise and uniform cutting of the extruded material.

The cutting system is essential for preparing test samples, which can then be used for mechanical testing or product evaluation. The ability to produce consistently sized samples is vital for ensuring that the material meets the necessary specifications.