Five common failures and solutions for laboratory granulators

　　Pharmaceutical Network Technical Article: Laboratory Granulation Machine is a "pressing" principle of powder-like dry materials into grain equipment, with compact structure, easy installation and maintenance, reliable work performance and so on, often used in the laboratory production tests, can be widely used in pharmaceutical, food, chemical and other industries dry powder granulation It is important for users to understand and understand the common failures and solutions of laboratory granulators
Wear ring wear The role of the wear ring is to protect the drive wheel, to avoid premature wear to extend its service life, and the role is to make the ring mold and drive wheel to do concentric circular motion
In the process of using the laboratory granulation machine, wear ring wear is inevitable, generally manifested as the match surface brightened In this case, a layer of grease can be applied to reduce wear on its surface If the wear is too severe, the wear ring needs to be replaced, otherwise it can lead to the consequences of the rupture of the ring mold, affecting the life of the bearing
Technicians also reminded that the wear ring in the work because of vibration will protrude, the user every time when changing the ring mold needs to be the drive wheel on the ring mold installation position clean, the wear ring knock back into place
The anchor pin is disconnected The user is able to tear the pin off if the screw at one end is tightened at one time when installing the hoop Therefore, the correct installation method is important
Technicians said that when installing the hoop, pay attention to the letter alignment of both ends of the hoop, before installation can be on both sides of the hoop grease, reduce the clamp strap when the equipment starts and stops the wear During installation, a piece with a positioning hole is first installed and the other two pieces are installed When tightening the screws, three screws need to be uniform, gradually tightened, and try to ensure the uniformity of the three gaps After pretensioning with a ratchet wrench, gradually increase the force in turn with the extended handle until tight
Drive health wear transmission keys play the role of positioning In the ring mode start of the moment, the ring mode key slot and the transmission key will occur instantaneous impact, over time, will aggravate the wear of the transmission key, so the user needs to pay attention to timely replacement
It is understood that some users will find the ring mold key slot part of the fracture, its gap is the transmission key wear after wear and not timely replacement result Technicians suggest that, in order to minimize the impact on the transmission key damage, the user before tightening the hoop screw, reversible clockwise rotation ring mold, the transmission key and ring key groove gap reduced to a smaller
"Fish eye" phenomenon The mold mask screws are generally used with elastic gaskets, the role is to ensure that the ring mold is molded deformation with the ring mold to form a relative dislocation, to prevent the screw scuttle
It is worth noting that the user should not tighten the screws too tightly when they unscrew them, as this may cause damage to the screws (broken or worn shoulders), as well as the "fish eye" phenomenon Fisheye phenomenon is due to the selection of high-strength screws directly tightening, in the work, directly the ring mold threaded hole position pulled out of the phenomenon
Grip loose It is understood that the hoop in the processing is after the completion of the whole circle and then cut, installation between each piece of the gap, so it is difficult to ensure that the position of the bolt hole in a line
In this case, users can use a group of spherical gaskets to ensure that the gasket is a spherical fit, gasket and bolts, nuts, gaskets and hugging hoops are flat contact, can further avoid bolt deformation, as well as loose hoops and other problems.