The clamp type hopper mixer is widely used in the pharmaceutical industry production process for mixing different components of dry powder and powder, as well as dry powder and particles. This machine has functions such as automatic lifting, mixing, and lowering, and can be equipped with various specifications of hoppers for mixing operations. It is suitable for large and medium-sized pharmaceutical enterprises, and can mix multiple varieties and batches of drugs according to process requirements on a single machine, achieving multi-purpose use.
Common problems and solutions for clamp hopper mixer:
1、 Sealing system issues
1. Hopper leakage
Mainly due to aging sealing strips or insufficient cylinder pressure, it is manifested as material leakage around the discharge door. The solution includes replacing the wear-resistant rubber sealing strip (recommended to check once every quarter) and adjusting the cylinder pressure to the standard value (usually 0.6-0.8MPa).
2. Leakage at the flange connection
The flange gasket is prone to wear after long-term use, and can be improved by installing metal wrapped gaskets and conducting quarterly pressure tests. Pay special attention to the tightening status of the bolts at the connection of the shell.
2、 Mechanical operation failure
1. Bearing overheating
Possible causes include uneven bearing seats, improper lubrication, or motor rotor eccentricity. Immediate shutdown inspection is required to ensure that the lubricating oil accounts for 70% -80% of the bearing space, and to calibrate the concentricity of the equipment.
2. Abnormal vibration
Mostly caused by loose supporting feet or equipment imbalance. Regular checks should be conducted on the tightening of the anchor bolts, and a level should be used to calibrate the equipment (with a permissible deviation of ≤ 0.1mm/m).
3、 Mixed performance issues
1、 物料混合不均
It is related to the low speed of the mixer or the excessive loading capacity of the hopper. Suggest increasing the speed to the rated value (usually 25-35rpm) and controlling the loading amount to not exceed 70% of the volume.
2. Material sticking to the wall
It can be improved by adjusting the agitator speed (increasing by 10% -15%) or increasing the equipment tilt angle (recommended 15 ° -20 °). In severe cases, PTFE coating should be used on the inner wall of the hopper.
4、 Electrical control system
1. Brake failure
After the mixing is completed, the rotating frame cannot stop vertically. It is necessary to check the thickness of the brake friction plate (which must be replaced if it is less than 2mm) and the condition of the hydraulic oil (which should be replaced every 24 months).
2. Sensor false alarm
The malfunction of the positioning sensor can lead to abnormal clamping signals. It should be calibrated regularly with a standard calibration board and the sensor probe should be kept clean.
5、 Preventive maintenance recommendations
Daily inspection: sealing strip status, air pressure system pressure (0.4-0.6MPa), and dust collector filter bag.
Monthly maintenance: Ultrasonic inspection to detect hidden cracks in the hopper, replace the filter element.
Annual overhaul: replace the hydraulic oil comprehensively and check the wear of the transmission chain (if the elongation rate is greater than 3%, it needs to be replaced).