Common Faults and Quick Repair Methods of Tableware Packaging Machines Revealed

Importance and Impact of Faults in Tableware Packaging Machines

In today's rapidly developing catering industry, tableware packaging machines plays a vital role. It not only significantly improves packaging efficiency and meets the requirements of large-scale production, but also effectively ensures the sanitary safety of tableware and provides health protection for consumers. At the same time, exquisite packaging is also an important means of brand promotion, which helps to enhance brand image and market competitiveness.

However, tableware packaging machines will inevitably encounter various malfunctions in the process of use. These malfunctions not only lead to significant reductions in productivity and increased production costs, but can also affect packaging quality, which can impact customer experience and negatively impact businesses. Therefore, it is of great significance to the stable operation and sustainable development of enterprises to repair the malfunction of tableware packaging machine faults quickly and accurately, shorten downtime, reduce the loss and ensure food safety.

2.1 Film Conveying System Faults

Fault Phenomena

Thin film delivery system is a key component of the tableware packaging machine. The main faults are film misalignment, breakage, poor film feeding and so on. Film misalignment leads to uneven packaging, which affects aesthetics; film breakage interrupts production, which increases material waste; and poor film holding, which leads to loose packaging, which affects product quality.

Cause Analysis

The main causes of these faults include inconsistent guide groove with the the longitudinal sealing roller centerline, excessive or insufficient longitudinal sealing roller pressure, edge burr or uneven thickness of the film. Inconsistency between the guide groove and the center line of the longitudinal sealed drum can lead to uneven forces on the film during transport, which can lead to bias during transport. Inappropriate pressure on the longitudinal sealed drum can affect film clamping; excessive pressure can lead to film breakage, while insufficient pressure can lead to poor clamping; and uneven burr on the edges or thickness of the film can also affect normal transport and clamping.

Quick fixes

To solve the problem that the guide groove does not accord with the center line of the longitudinal sealing roller centerline, adjust the longitudinal sealing roller pressure knob to ensure correct clamping and correct the center line of the guide groove. Replace the guide groove if necessary. For burrs or uneven film thickness, trim the film edges and check the shearing device to make sure they work properly.

2.2 Sealing System Failure

Fault symptoms

Common forms of seal system failures include incomplete sealing, misaligned sealing lines, seal crease, etc. Incomplete sealing can lead to tableware contamination during transport and storage, affecting food safety; misaligned sealing lines can affect the appearance and quality of packaging; and wrinkles in the seal can make packaging unsafe.

Cause Analysis

The main cause of sealing system failures is insufficient or too high temperature of horizontal sealing knife, uneven sealing pressure and incorrect positioning of hot rod. Inappropriate horizontal sealing knife temperature will affect sealing fusion effect, too low temperature will make the film can not fully fuse, and too high temperature will cause the film to scorch. Uneven sealing pressure can lead to misaligned sealing lines or incomplete sealing. anti-scalding rod positioning will affect the flatness of the seal.

Quick fixes

Checking the horizontal sealing knife temperature is key to solve the problem of sealing temperature. Infrared thermometers can be used to check to make sure the temperature is in the appropriate range. Adjust the horizontal sealing roller pressure adjustment knob, pay attention to push and pull knob coordination, ensure uniform sealing pressure. At the same time, adjust the anti-scalding rod so that it is flush with the edge of the blade to ensure the flatness of the sealing area.

2.3 Cutting System Failure

Failure Phenomena

The main faults of cutting system are continuous cutting and uneven cutting. Continuous cuts will hinder the normal separation of the packaging bags and the subsequent production process; uneven cutting will affect the appearance and quality of the bag.

Cause Analysis

Excessive clearance between moving blade and stationary blade, blade clutch malfunction, blade wear or damage are common causes of cutting system failure. Excessive clearance between the moving blade and stationary blade leads to incomplete cutting, which leads to continuous cutting; clutch failure of the blade, which affects the normal operation of the blade; wear or damage of the blade, which worsens the cutting effect, which leads to uneven cutting.

Quick fixes

Adjust the blade distance to 0.01mm using a tentacle gauge to ensure an appropriate gap between the moving blade and stationary blade. For blade clutch malfunction, please replace clutch plate or repair positioning key. If the blade is badly worn or damaged, the blade should be polished or replaced in a timely manner.

3.1 Thermal seal temperature anomaly.

Fault Phenomenon

Heat seal Abnormal temperature mainly manifests that the heat cannot be heated or temperature is out of control. Failure to heat the seal will affect normal process and production schedule; uncontrolled temperature will lead to high or low sealing temperature, affecting the quality of the seal.

Cause Analysis

The main causes of thermal seal temperature anomaly are open circuit, temperature controller fault or thermocouple short circuit in heating element or fuse. The opening in the heating element or fuse will prevent the heat seal from receiving sufficient heat; a fault in the temperature controller will affect temperature control and cause the temperature to lose control; and a short circuit in the thermocouple will lead to inaccurate temperature detection and affect the normal operation of the temperature controller.

Quick fixes

Check the input/output voltage of the power supply for voltage abnormality. If the heating element opens or the fuse explodes, replace the heating element or fuse immediately. If temperature controller fails or the the thermocouple short-circuit, replace temperature controller or reconnect the thermocouple wires.

3.2 Abnormal Motor Operation of motor.

Fault Phenomena

Common performance of motor operation abnormality includes paper feeder motor shutdown and feeble drawing bag motor. Stopping paper feeding motor will affect the forming and transmission of the bag, so that packaging bags bag can not feed the paper properly, leading to the production interruptions.

Cause Analysis

The main reasons for abnormal motor operation are short circuit starting capacitance, drive failure, proximity switch or faulty sensor. A short-circuited starting capacitor will make the motor unable to start properly, fault drive will affect the motor speed and torque, misplaced proximity switch or sensor will make the motor unable to receive the correct signal, resulting in the motor not working properly.

Quick fixes

Replace the capacitor or actuators to address a short-circuited starting capacitor or actuators. Adjust the proximity switch to a distance of 3-5mm and clean the sensor lens to ensure the sensor works properly.

3.3 Color Positioning Failure

Fault Phenomena

The failure of color-coded localization is mainly due to the inaccuracy of packaging bag length and misaligned cuts. Inaccurate packaging bag length will affect the product's packaging specifications, resulting in non-conformity to production requirements; misaligned cuts will affect the aesthetic and quality of the packaging.

Cause Analysis

Low sensitivity or incorrect placement of the photoelectric sensor and incorrect setting of length parameters of cloth bag are the main reasons of color label positioning failure. Low sensitivity or incorrect placement of the photoelectric sensor will prevent accurate identification of color markers; incorrect setting of bag length parameters will result in packaging bag not reaching the required length.

Quick fixes

Cleaning the photoelectric head lens, increasing the sensitivity of the photoelectric sensor, adjusting gain to 70%. Reinstall the bag length parameters, calibrate the encoder to ensure that packaging bag length and cutting position are accurate.

4.1 Unstable Feeding

Fault Phenomenon

Unstable feeding mainly characterized by fluctuation of filling volume and drip irrigation. Fluctuations in filling volumes can affect consistency in product quality, resulting in some products being filled too much or too little, wastes materials to trickle out and potentially contaminating equipment and working environments.

Cause Analysis

The main reasons for the unstable feeding are incorrect Misaligned stopcock position, pipe blockage and loosening of feeding rod. The position of stopper does not influence flow control of liquid; the blockage of pipeline hinders normal flow of liquid, which leads to unstable filling volume; and the loosening of loose stopcock lever affects the stopcock's seal of stopper, which leads to dripping.

Quick fixes

Calibrate the stopcock position using dial indicator to ensure accuracy. Use ultrasonic cleaning to remove blockages in pipes. Tighten the stopcock lever screws to ensure proper sealing.

4.2 Sealing Leakage

Fault Phenomenon

Sealing leakage is when liquid seeps out of a seal. Not only is this a waste of liquid, it can also affect product quality and safety.

Cause Analysis

Insufficient sealing temperature or uneven pressure, as well as damage to the lining of the packaging film are the main causes of seal leakage. Insufficient sealing temperature or uneven pressure may prevent the seal from fusing sufficiently, leading to leakage, and damage to the lining of the packaging film may cause liquid to seep directly from the damaged area.

Quick fixes

Increase the sealing temperature to a suitable range to ensure full fusing of the seal. Adjust air pressure to 0.4-0.6 MPa to ensure uniform sealing pressure. If the lining of the packaging film is damaged, the damaged packaging film shall be replaced in a timely manner.

5.1 Daily Maintenance Highlights.

Daily maintenance is an important aspect to ensure the normal operation of the tableware packaging machine. Gears, sprockets and lead screws should be cleaned and lubricated regularly to reduce wear and extend the service life of the equipment. At the same time, check whether the fasteners (nuts, keys, screws) are loose, tighten any loose fasteners in time to prevent equipment malfunctions caused by loosening. In addition, all damaged utensils should be cleaned up to prevent them from interfering with transmission components and affecting normal operation of the equipment.

5.2 Periodic Maintenance Plan

A regular maintenance plan helps to identify and resolve potential equipment problems in a timely manner. The safety of circuit connections, the regularity of sensor sensitivity and the stability of the pneumatic system should be checked monthly. Quarterly calibration shall calibrate mechanical precision (e.g. blade spacing and sealing pressure) and adjust the tension of transmission components. Worn parts (such as heating elements, belts and bearings) should be replaced annually to ensure stable equipment performance.

5.3 Safe Operating Procedures

Safe production is the key to ensuring the safety of people and equipment. Equipment should be grounded reliably to prevent electrocution. Do not explore or touch dangerous areas to avoid accidental injury. Operators must not wear gloves and long-haired personnel must wear safety helmets to ensure safe operation. At the same time, the location of the emergency stop button should be clearly established, and operators should be trained the equipment's operating procedures and emergency response methods.

6.1 Tiered Handling

When repairing tableware packaging machine malfunctions, we should follow the principle of layered treatment: first deal with electrical malfunction, then deal with mechanical malfunction; first solve simple problem, then deal with complex problem. This will improve maintenance efficiency and reduce downtime.

6.2 Data-Driven Approach

The fault is quantified by infrared thermometer and tentacle meter. Through accurate data analysis, find out the root cause of the fault, implement targeted maintenance measures to improve the accuracy and effectiveness of maintenance.

6.3 Prevention First

Through the establishment of routine maintenance, periodic upkeep, annual maintenance system, strengthen preventive maintenance, unnecessary downtime can be reduced by 75%, equipment failure rate reduced, equipment utilization and safe production level.

6.4 Professional Support

For complex faults, the company should contact the manufacturer or professional maintenance team in a timely manner to use their expertise and experience to resolve the equipment malfunction and ensure that the equipment can return to normal operation as soon as possible.