Cement Block Making Machine in Sri Lanka

To prevent failures of core components of cement brick machines, it is necessary to focus on the four core dimensions of "regular inspection, standardized operation, environmental control, and maintenance", and formulate targeted measures based on the characteristics of core components (such as hydraulic systems, motors, molds, transmission systems, and electrical components) to reduce the risk of failure from the source. The following are specific and practical preventative measures:
1. Hydraulic System (Master Cylinder, Oil Pump, Solenoid Valve, etc.) Failure Prevention
The hydraulic system is the "power heart" of the cement brick machine. Failures are often caused by oil contamination, abnormal pressure, and seal aging. Key control measures for oil and pressure are essential:
Strictly control oil quality and cleanliness.
Regularly test the hydraulic oil's viscosity, water content, and impurity content (recommended every three months). Replace immediately if the oil is turbid, has an odor, or contains excessive impurities.
When refueling, use a filter (with a precision of ≥10μm) to avoid pouring directly into the oil tank. The hydraulic oil tank cap must be tightly sealed to prevent the ingress of dust and moisture (especially in the dusty environment of a brick factory).
Clean the hydraulic oil filter element regularly (every 15 days). Replace the filter element promptly if it becomes clogged. Do not use compressed air to clean the filter element, as this can damage the filter media and allow impurities to enter the system. Stable control of hydraulic pressure and load.
Set the operating pressure strictly according to the equipment manual (e.g., main cylinder pressure should generally not exceed 25 MPa). Overpressure operation is prohibited (overpressure can damage the cylinder liner and seals).
Before each startup, run the hydraulic system at no load for 5-10 minutes (wait until the oil temperature reaches 20-40°C) to avoid high-pressure startup in cold conditions.
If a sudden increase or decrease in pressure occurs during production, immediately stop the machine and check whether the solenoid valve and pressure sensor are functioning properly. Restart the machine after correcting the problem.

Regularly inspect seals and piping.
Inspect the seals (such as O-rings and dust seals) of the main cylinder, oil pump, and solenoid valve every month. Replace any leaks, deformation, or deterioration immediately. (It is recommended to keep spare seals of the same model to avoid downtime.)
Inspect hydraulic piping for loose joints and piping for wear and deformation (especially those near moving parts). Replace any cracks immediately to prevent bursting. 2. Motor and Electrical Component (Motor, Sensor, Controller) Fault Prevention
The motor is the "power source" and the electrical components are the "nerve center." Faults are often caused by overload, poor heat dissipation, and dust and moisture:
Avoid motor overload and poor heat dissipation.
Never start the motor under load (for example, starting the main motor when the brick machine mold has not been reset). Before each startup, check that the mold and transmission components are not stuck.
Clean the motor cooling fan and heat sink regularly (once every 7 days) to prevent dust from covering and causing heat dissipation failure (motor temperatures exceeding 80°C accelerate winding insulation aging).
Check the motor current (using a clamp meter). If the operating current continuously exceeds 110% of the rated current, immediately shut down the machine for inspection (this may be due to mechanical jamming or a short circuit in the motor windings). Protect electrical components from dust and moisture.
Electrical control cabinets should be equipped with dustproof seals. Open the cabinet doors regularly for ventilation (once every three days for 30 minutes) to prevent condensation inside the cabinet (a dehumidifier can be installed, especially in humid southern regions).
Precision components such as pressure sensors and proximity switches should be covered with dust covers and wiped with a dry cloth every 10 days (do not use a wet cloth to prevent short circuits).
Inspect electrical terminals regularly (once every month). If loose or oxidized, sand them and retighten them. Loose terminals can cause poor contact and burn the sensor or controller.

Test the performance of electrical components regularly.
Check the insulation resistance of motor windings every three months (using a megohmmeter; insulation resistance ≥ 0.5 MΩ is acceptable). If the resistance is too low, dry the windings or replace the motor.
Test the accuracy of pressure sensors and limit switches (for example, when the set pressure is 20 MPa, the sensor display error should be ≤ 0.5 MPa). Calibrate or replace any errors that exceed the limit. 3. Failure Prevention for Molds and Molding Components (Molds, Vibrators)

Molds are crucial for molding. Vibrators affect the density of the bricks. Failures are often caused by wear, abnormal vibration, and material adhesion:

Control mold wear and force balance

Before each production run, apply a release agent (such as a mixture of waste engine oil and talcum powder) to the inner wall of the mold cavity to prevent cement slurry from adhering to the mold. Adhesion can lead to uneven force during demolding, causing cracking.

Regularly inspect the mold cutting edge and cavity for wear and deformation (once every 10 days). If wear is severe (e.g., cavity dimensional deviation exceeds 2mm), repair or replace immediately with welded parts. (It is recommended to keep one or two sets of frequently used molds on hand for rotational use to extend their lifespan.)

When adjusting mold pressure, ensure balanced force between the upper and lower molds (control the amplitude of the lower mold within 2-4mm). Avoid excessive pressure on one side (which can cause mold cracking and brick deformation). Maintain stable vibrator operation.
Regularly check the lubrication of the vibrator bearings (once every month) and add high-temperature grease (such as lithium-based grease, suitable for temperatures between -20°C and 120°C) to prevent dry grinding and bearing burnout.
Check the bolts connecting the vibrator to the mold for tightness (once every three days). Loose bolts can cause vibration offset and increase mold wear.
If the vibration sound is abnormal (such as unusual noise or weak vibration), immediately stop the machine and check whether the eccentric weight is loose or the bearing is damaged. Restart the machine after correcting the problem. IV. Transmission System (Gear, Chain, Belt) Trouble Prevention
The transmission system is the "link" of power transmission. Failures are often caused by insufficient lubrication, improper tensioning, and wear:
Ensure adequate lubrication.
Replace the gearbox oil every six months (select the viscosity according to the manual, such as 220# industrial gear oil). Thoroughly clean impurities inside the gearbox before replacement.
Add lubricant (such as 46# machine oil) to the chain drive every two days to prevent dry friction that can cause chain wear and breakage.
Do not add lubricant while the transmission components are in operation to prevent hands or tools from becoming entangled.
Adjust Tension and Alignment.
Check belt tension regularly (every seven days): Press the center of the belt with your finger. Adequate tension is acceptable if it deflects 10-15mm. Too loose can cause slippage (resulting in insufficient power transmission), while too tight can break the belt and wear the bearings.
Check the alignment of the gears and chain. If gear meshing is misaligned or the chain is running, immediately adjust the transmission components to prevent unilateral wear. Regularly check for wear.
Every month, check gear teeth for pitting or broken teeth, and chain links for deformation or binding. Replace any problems promptly (keep spare gears and chains of the same model to minimize downtime).
V. General Preventive Measures: Standardized Operation and Regular Maintenance
Establish Standardized Operating Procedures (SOPs).
Operators are prohibited from arbitrarily adjusting equipment parameters (such as pressure and vibration frequency). New employees must undergo training and pass assessment before taking up their posts.
If any abnormalities occur during production (such as unusual noises or poor brick quality), immediately shut down the machine and report it to maintenance personnel. "Running with problems" is prohibited (minor problems can lead to major failures, such as minor leaks that remain untreated, resulting in the failure of the cylinder).
Establish an equipment maintenance log.
Record the time and content of each maintenance (such as changing hydraulic oil or cleaning filters), the responsible person, and the troubleshooting history (such as the problem symptoms and the corrective action) to facilitate tracing the root cause of the problem.
Determine a "major maintenance" plan based on the equipment's lifespan (e.g., a complete disassembly and inspection after one year of use, replacing aging components). Improve the equipment operating environment.
Brick factories are dusty and humid. Therefore, dust covers should be installed around the brick machines (especially covering the hydraulic system and electrical control cabinet). The ground should be regularly sprinkled with water to reduce dust (to prevent dust from entering the equipment).
During winter temperatures, if the equipment is parked outdoors, drain the hydraulic system fluid (or add antifreeze) to prevent freezing and rupture of the pipes. During summer temperatures, install cooling fans on the motor and hydraulic oil tank to prevent excessive oil and motor temperatures.
These measures can reduce the failure rate of core components in cement brick machines by over 60% and extend component life. (For example, timely hydraulic oil changes can extend cylinder life by 2-3 years, and proper mold maintenance can reduce mold replacement frequency by 30%), ultimately reducing downtime and improving production efficiency.