The oil temperature deviation of the injection molding machine affects production efficiency and product quality. The reasons include unbalanced heating and cooling systems, environmental factors, etc. Oil temperature deviation will lead to deterioration of product quality, reduced production efficiency and equipment damage. Solutions include repairing or replacing faulty parts, optimizing temperature control systems, improving environmental conditions and introducing advanced technologies. Preventive measures include strict operating procedures, regular training, establishing a monitoring system and continuous improvement.
In the injection molding production process, the injection molding machine is the core equipment, and its operating status directly determines the production efficiency and product quality. Oil temperature deviation is one of the common faults of injection molding machines. It will not only affect the normal operation of the injection molding machine, but also may lead to deterioration of product quality. This article will first give the answer to solve the oil temperature deviation of the injection molding machine, and then analyze its causes and solutions in detail.
Causes and details of oil temperature deviation
The oil temperature deviation of the injection molding machine is mainly caused by the imbalance of the heating and cooling systems. Specific reasons may include:
1. Temperature sensor failure: In the oil temperature control system of the injection molding machine, the temperature sensor is responsible for real-time monitoring of the oil temperature and feedback to the control system. When the temperature sensor fails, it may not accurately measure the oil temperature, causing the control system to receive an erroneous signal and produce an oil temperature deviation.
2. Decreased efficiency of the oil cooler: The oil cooler is an important part of the oil temperature control system of the injection molding machine and is responsible for controlling the oil temperature within the set range. After long-term use, dirt may accumulate inside the oil cooler, resulting in a decrease in cooling efficiency and failure to reduce the oil temperature to the set value in time.
3. Improper setting of oil temperature control parameters: The parameter setting of the oil temperature control system of the injection molding machine directly affects the control accuracy of the oil temperature. If the parameters are set improperly, the oil temperature control may be unstable and produce deviations.
4. Hydraulic system leakage: If there is a leak in the hydraulic system of the injection molding machine, it will cause insufficient hydraulic oil flow, which will affect the control of the oil temperature. Hydraulic system leakage may be caused by aging, damage or improper installation of seals.
5. Hydraulic oil contamination: During long-term use, hydraulic oil may be contaminated by external impurities, moisture, etc., resulting in a decrease in oil performance and affecting the control effect of oil temperature.
Impact of oil temperature deviation
The impact of oil temperature deviation on injection molding machines is multifaceted:
1. Product quality decline: Too high or too low oil temperature will affect the melting and injection process of plastics, resulting in product defects such as bubbles, shrinkage marks, deformation, etc.
2. Reduced production efficiency: Unstable oil temperature will lead to extended injection cycle and reduced production efficiency.
3. Equipment damage: Long-term oil temperature deviation will accelerate equipment wear and shorten service life.
4. Increased energy consumption: In order to maintain a stable oil temperature, it may be necessary to increase the energy consumption of heating or cooling.
Detection method of oil temperature deviation
In order to accurately determine the cause and degree of oil temperature deviation, the following detection methods can be adopted:
1. Temperature measurement: Use a thermometer or infrared thermometer to measure the temperature of various parts of the injection molding machine to find out the area with abnormal temperature.
2. System inspection: Check whether the heating element, cooling water circuit, temperature sensor, etc. are working properly.
3. Data analysis: record and analyze the trend of oil temperature changes over time, as well as the relationship with injection molding cycle, product quality, etc.
Detailed solution
1. Check and replace faulty temperature sensor:
First, check whether the temperature sensor is faulty. This can be determined by comparing the actual oil temperature with the sensor display value. If the sensor is found to be faulty, a new sensor should be replaced in time to ensure accurate oil temperature measurement.
2. Clean or replace the oil cooler:
For the problem of reduced efficiency of the oil cooler, measures such as cleaning or replacing the oil cooler can be taken. When cleaning the oil cooler, a special cleaning agent should be used to thoroughly remove the internal dirt. If the effect is still not ideal after cleaning, it is recommended to replace a new oil cooler.
3. Adjust the oil temperature control parameters:
According to the actual situation of the injection molding machine and production needs, reasonably adjust the oil temperature control parameters. You can refer to the parameter setting suggestions provided by the injection molding machine manufacturer, or find the best parameter combination through actual experiments.
4. Check and repair hydraulic system leaks:
Regularly check the seals and connecting parts of the hydraulic system, and repair them in time if leaks are found. For aging or damaged seals, they should be replaced in time. At the same time, ensure that the installation quality of the hydraulic system meets the requirements to avoid leakage problems caused by improper installation.
5. Regularly replace the hydraulic oil and keep it clean:
In order to prevent the oil temperature deviation caused by hydraulic oil contamination, the hydraulic oil should be replaced regularly and the quality of the new oil should be ensured to meet the requirements. When replacing the hydraulic oil, the oil tank and oil circuit should be thoroughly cleaned to avoid the residual old oil from contaminating the new oil. At the same time, strengthen the daily management of the hydraulic oil to prevent external impurities and moisture from entering the hydraulic system.
Preventive measures and suggestions
1. Strengthen daily inspections and maintenance: Regularly conduct comprehensive inspections and maintenance of the oil temperature control system of the injection molding machine, promptly discover and deal with potential problems, and ensure the normal operation of the system.
2. Improve the skills of operators: Strengthen the training and education of operators to improve their operating skills and their understanding of the oil temperature control system of the injection molding machine. Ensure that operators can master the operation methods and precautions of the oil temperature control system.
3. Establish a complete equipment file: Establish a detailed equipment file for each injection molding machine to record the operating status, maintenance history, and replacement parts of the equipment. This helps to promptly discover potential problems with the equipment and provide strong support for the repair and maintenance of the equipment.
4. Introduce advanced oil temperature control technology: With the continuous development of science and technology, new oil temperature control technologies continue to emerge. The introduction of advanced oil temperature control technology can improve the accuracy and stability of injection molding machine oil temperature control and reduce the probability of oil temperature deviation.
In short, solving the problem of injection molding machine oil temperature deviation requires multiple aspects, including cause analysis, impact assessment, detection methods and solutions. By taking scientific methods and effective measures, stable control of oil temperature can be achieved, and the production efficiency and product quality of injection molding machines can be improved. At the same time, the implementation of preventive measures is also the key to avoid similar problems from happening again.
