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During the pressing production process of copper-clad laminates, several stages—such as heating, temperature maintenance, and cooling—are essential due to process requirements. Each stage demands that the temperature of the heat-transfer medium be adjusted accordingly. However, during the cooling phase, the heat energy from the medium is completely lost, leading to significant waste.

To enhance energy efficiency, reduce consumption, and improve the economic performance of our company, we have independently developed this energy-saving equipment. By leveraging the principle that increasing the flow rate of liquid within a specially modified, sealed container can prevent cold-and-hot neutralization, the system enables real-time, continuous exchange between hot and cold media. During the design phase of the thermal oil system, we carefully integrated the technical requirements provided by our clients, ensuring a balance among safety, reliability, energy conservation, and minimized equipment investment. Drawing on years of practical engineering experience and validated operational parameters, we created an energy-efficient thermal oil system—and equipped it with its dedicated control system and actuator components. This resulted in the innovative LS-S Energy-Saving Device.

Our company has repeatedly upgraded steam heating systems to more energy-efficient heat-transfer oil systems tailored to our customers' specific needs. Although this upgrade requires customers to invest in additional equipment, the cost is typically recouped within one or two years through significant energy savings. By improving energy efficiency, we help reduce customers' product costs, enabling them to save money—and ultimately contributing to national energy conservation efforts as well.

 

Advantages of the heat transfer oil energy-saving system:

High thermal efficiency, saving energy: There are two commonly used heating mediums for press machines: steam and thermal oil. Steam loses about 20% of its total heat during the heating process—this is due to the difference in enthalpy between water and steam at the same pressure. In contrast, thermal oil remains entirely contained within the piping system as it circulates, ensuring no heat loss through leakage except for the amount transferred to the press machine itself.

The equipment features low operating pressure and is safe and reliable. : Since steam temperature and pressure are directly proportional—meaning higher temperatures require higher pressures—to meet the heating demands of the compressor, typical boiler pressures must exceed 13 kg/cm². In contrast, when using thermal oil for heating, there’s no need for such high pressure; instead, only the pressure required to ensure adequate flow of thermal oil through the piping system is necessary, which usually ranges from 4 to 6 kg/cm².

Uniform heating temperature: Since the temperature of steam is determined by pressure, any differences in location result in variations in both pressure and, consequently, temperature. Therefore, in a press heated by steam, the temperature difference between the top and bottom layers tends to be greater compared to one heated with thermal oil. Additionally, steam heating introduces condensation water, which creates uneven steam flow across different areas of the heating plates, further contributing to temperature inconsistencies. As a result, steam heating inherently exhibits greater temperature non-uniformity than heating with thermal oil.

Economic benefits:

In the current market economy, the copper-clad laminate industry is actively exploring ways to reduce production costs and enhance product quality. Among these efforts, converting steam-heated presses to heat-transfer oil heating has proven to be a highly effective approach. Over the years, our company has successfully upgraded steam-powered presses for numerous foreign enterprises across China, gaining extensive hands-on experience in every stage—from design and manufacturing to installation and commissioning. As a result, we’ve established ourselves as a leading, specialized firm in the field of press line renovations nationwide.

Here's a comparison of the benefits resulting from the press machine upgrade:

 

Steam heating		Hot kerosene heating
Energy conservation	Thermal efficiency is low, and heat loss is significant.	Compared to steam heating, it can save about 50% of energy.
	The boiler has significant capacity requirements.	Compared to steam heating, the boiler's capacity requirement can be reduced by half.
	Steam is converted back into normal-pressure hot water and then discharged through a steam trap.	The heat transfer oil is circulated repeatedly, with no heat loss or leakage other than the heat exchanged with the thermal press.
Production	The press has long heating and cooling cycles per batch, resulting in lower productivity.	Temperature control is stable, with short heating and cooling times, significantly boosting press utilization and increasing the output of each machine by 10% to 30%.
	Additionally, steam heating: Due to the presence of condensate, temperature differences exist at various points on the heating plate.	Each layer heats evenly, ensuring high product quality.
Quality	The product defect rate is relatively high.	Product quality rate reaches 99%
	There are many human factors involved in the production process, leading to inconsistent product quality.	Heat transfer oil heating enables fully automatic control of the compressor system, ensuring stable product quality.
	Users have filed numerous complaints about product quality.	Customer complaints about product quality have decreased by 90%.
Cost	Steam pressure requirements are high; to meet the heating needs of the press, boiler pressure typically needs to be above 13 kg/cm².	The pressure required for the flow of heat transfer oil in the pipeline is typically 4–6 kg/cm², which keeps the equipment’s pressure resistance requirements low and ensures high safety.
	Higher costs	Thanks to energy conservation, high productivity, and consistent quality, product costs have been significantly reduced.

 

System Settings:

The thermal oil heating automatic monitoring system is divided into two main components: one is the thermal oil heating oil circuit system, and the other is the thermal oil heating automatic monitoring system.

1. Thermal Oil Heating System: Depending on the specific process requirements of each plant, this system can be configured in various ways. Some equipment may even be shared among multiple presses. The system primarily includes the following components:

1.1 Thermal Oil Boiler System: Provides the heat source for heating purposes;

1.2 Thermal Oil Tank: Serving as a thermal energy storage area, it helps regulate the press's varying heat source demands during heating startup and holding periods. Additionally, it minimizes fluctuations in the thermal oil temperature during heating, ensuring consistent product quality.

1.3 Cold Oil Tank and Cooler: Serves as a cold source for cooling the press. Depending on the process requirements for varying cooling rates, you can either equip just a cooler or combine a cold oil tank with a cooler.

1.4 Accumulator: Serving as a temporary storage for hot and cold oil during heating and cooling processes, it helps reduce the system's demand for heating and cooling when temperatures rise or fall, thereby saving energy.

1.5 Valve Components: Primarily include heating and cooling three-way control valves and three-way diaphragm valves, which serve as the elements that create different oil circuit pathways.

1.6 Area Circulation Pump: It serves as the power source that drives the heat transfer oil through the compressor circuit.

2. Thermal Oil Heating Automatic Monitoring System This system can be configured in various ways depending on the level of automation in the factory's presses, but it primarily consists of the following components:

2.1 Electrical Control Cabinet;

2.2 Intelligent Pressure, Temperature, and Vacuum Controllers;

2.3 Programmable Logic Controller and Touchscreen Terminal Interface;

2.4 Monitoring computers and the corresponding software;

System features:

1. Monitoring Function:

1.1 Real-Time Monitoring Section: Includes system monitoring, process curve monitoring, and alarm monitoring. It enables real-time monitoring (or printing) and recording of the press’s set process curves, as well as real-time process curves for pressure, temperature, and vacuum. The system can dynamically display individual process parameters, feedback data, and over 30 temperature-pressure-vacuum curves. Additionally, it provides a live display of current furnace product information.

1.2 Data Analysis and Processing Section: Capable of storing 8 years of historical data, this section allows users to query and print product-related data, alarm events, and historical records for each batch—either monthly or daily. It also supports analysis of over 30 types of continuous temperature, pressure, and vacuum curves, as well as real-time data comparison between two batches of products.

1.3 Information Input Section: When product raw materials or varieties need to be changed, enter the relevant product information. The control system features a process curve-setting function, allowing users to create, store, and transmit up to 19 pressure-temperature process curves (each with 30 segments), along with associated instrument parameters.

1.4 System Management Section: Includes password management and data management features for system administrators, process engineers, and operators.

2 Touchscreen Operating System Features

2.1 Press Lifting, Lowering, and Pressure Control: Features both automatic and manual operation modes, with dynamic display of the hydraulic system’s operational status. The automatic mode handles the press’s pressing process automatically, while the manual mode is designed for debugging and troubleshooting, allowing users to set pressure levels, run times, and even configure step-wise positioning for automatic temperature control.

2.2 Temperature Control: Automatic and Manual Settings— When operating in automatic mode, the system automatically manages the entire temperature control process. The manual mode is designed for debugging and troubleshooting; when activated, it allows users to manually step through different temperature settings as needed.

2.3 The cage loading and unloading control system features both automatic and manual functions, with dynamic display of the cage’s operational status. In automatic mode, the system seamlessly completes the entire press machine’s loading and unloading process. Manual mode is designed for debugging and troubleshooting, allowing operators to perform actions such as advancing, retracting, lifting, lowering, and stopping the loading and unloading cages.

Custom-designed, non-standard thermal oil energy-saving systems tailored to meet diverse process requirements based on user needs.

 

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During the pressing production process of copper-clad laminates, several stages—such as heating, temperature maintenance, and cooling—are essential due to process requirements. Each stage demands that the temperature of the heat-transfer medium be adjusted accordingly. However, during the cooling phase, the heat energy from the medium is completely lost, leading to significant waste.

To enhance energy efficiency, reduce consumption, and improve the economic performance of our company, we have independently developed this energy-saving equipment. By leveraging the principle that increasing the flow rate of liquid within a specially modified, sealed container can prevent cold-and-hot neutralization, the system enables real-time, continuous exchange between hot and cold media. During the design phase of the thermal oil system, we carefully integrated the technical requirements provided by our clients, ensuring a balance among safety, reliability, energy conservation, and minimized equipment investment. Drawing on years of practical engineering experience and validated operational parameters, we created an energy-efficient thermal oil system—and equipped it with its dedicated control system and actuator components. This resulted in the innovative LS-S Energy-Saving Device.

Our company has repeatedly upgraded steam heating systems to more energy-efficient heat-transfer oil systems tailored to our customers' specific needs. Although this upgrade requires customers to invest in additional equipment, the cost is typically recouped within one or two years through significant energy savings. By improving energy efficiency, we help reduce customers' product costs, enabling them to save money—and ultimately contributing to national energy conservation efforts as well.

 

Advantages of the heat transfer oil energy-saving system:

High thermal efficiency, saving energy: There are two commonly used heating mediums for press machines: steam and thermal oil. Steam loses about 20% of its total heat during the heating process—this is due to the difference in enthalpy between water and steam at the same pressure. In contrast, thermal oil remains entirely contained within the piping system as it circulates, ensuring no heat loss through leakage except for the amount transferred to the press machine itself.

The equipment features low operating pressure and is safe and reliable. : Since steam temperature and pressure are directly proportional—meaning higher temperatures require higher pressures—to meet the heating demands of the compressor, typical boiler pressures must exceed 13 kg/cm². In contrast, when using thermal oil for heating, there’s no need for such high pressure; instead, only the pressure required to ensure adequate flow of thermal oil through the piping system is necessary, which usually ranges from 4 to 6 kg/cm².

Uniform heating temperature: Since the temperature of steam is determined by pressure, any differences in location result in variations in both pressure and, consequently, temperature. Therefore, in a press heated by steam, the temperature difference between the top and bottom layers tends to be greater compared to one heated with thermal oil. Additionally, steam heating introduces condensation water, which creates uneven steam flow across different areas of the heating plates, further contributing to temperature inconsistencies. As a result, steam heating inherently exhibits greater temperature non-uniformity than heating with thermal oil.

Economic benefits:

In the current market economy, the copper-clad laminate industry is actively exploring ways to reduce production costs and enhance product quality. Among these efforts, converting steam-heated presses to heat-transfer oil heating has proven to be a highly effective approach. Over the years, our company has successfully upgraded steam-powered presses for numerous foreign enterprises across China, gaining extensive hands-on experience in every stage—from design and manufacturing to installation and commissioning. As a result, we’ve established ourselves as a leading, specialized firm in the field of press line renovations nationwide.

Here's a comparison of the benefits resulting from the press machine upgrade:

 

Steam heating		Hot kerosene heating
Energy conservation	Thermal efficiency is low, and heat loss is significant.	Compared to steam heating, it can save about 50% of energy.
	The boiler has significant capacity requirements.	Compared to steam heating, the boiler's capacity requirement can be reduced by half.
	Steam is converted back into normal-pressure hot water and then discharged through a steam trap.	The heat transfer oil is circulated repeatedly, with no heat loss or leakage other than the heat exchanged with the thermal press.
Production	The press has long heating and cooling cycles per batch, resulting in lower productivity.	Temperature control is stable, with short heating and cooling times, significantly boosting press utilization and increasing the output of each machine by 10% to 30%.
	Additionally, steam heating: Due to the presence of condensate, temperature differences exist at various points on the heating plate.	Each layer heats evenly, ensuring high product quality.
Quality	The product defect rate is relatively high.	Product quality rate reaches 99%
	There are many human factors involved in the production process, leading to inconsistent product quality.	Heat transfer oil heating enables fully automatic control of the compressor system, ensuring stable product quality.
	Users have filed numerous complaints about product quality.	Customer complaints about product quality have decreased by 90%.
Cost	Steam pressure requirements are high; to meet the heating needs of the press, boiler pressure typically needs to be above 13 kg/cm².	The pressure required for the flow of heat transfer oil in the pipeline is typically 4–6 kg/cm², which keeps the equipment’s pressure resistance requirements low and ensures high safety.
	Higher costs	Thanks to energy conservation, high productivity, and consistent quality, product costs have been significantly reduced.

 

System Settings:

The thermal oil heating automatic monitoring system is divided into two main components: one is the thermal oil heating oil circuit system, and the other is the thermal oil heating automatic monitoring system.

1. Thermal Oil Heating System: Depending on the specific process requirements of each plant, this system can be configured in various ways. Some equipment may even be shared among multiple presses. The system primarily includes the following components:

1.1 Thermal Oil Boiler System: Provides the heat source for heating purposes;

1.2 Thermal Oil Tank: Serving as a thermal energy storage area, it helps regulate the press's varying heat source demands during heating startup and holding periods. Additionally, it minimizes fluctuations in the thermal oil temperature during heating, ensuring consistent product quality.

1.3 Cold Oil Tank and Cooler: Serves as a cold source for cooling the press. Depending on the process requirements for varying cooling rates, you can either equip just a cooler or combine a cold oil tank with a cooler.

1.4 Accumulator: Serving as a temporary storage for hot and cold oil during heating and cooling processes, it helps reduce the system's demand for heating and cooling when temperatures rise or fall, thereby saving energy.

1.5 Valve Components: Primarily include heating and cooling three-way control valves and three-way diaphragm valves, which serve as the elements that create different oil circuit pathways.

1.6 Area Circulation Pump: It serves as the power source that drives the heat transfer oil through the compressor circuit.

2. Thermal Oil Heating Automatic Monitoring System This system can be configured in various ways depending on the level of automation in the factory's presses, but it primarily consists of the following components:

2.1 Electrical Control Cabinet;

2.2 Intelligent Pressure, Temperature, and Vacuum Controllers;

2.3 Programmable Logic Controller and Touchscreen Terminal Interface;

2.4 Monitoring computers and the corresponding software;

System features:

1. Monitoring Function:

1.1 Real-Time Monitoring Section: Includes system monitoring, process curve monitoring, and alarm monitoring. It enables real-time monitoring (or printing) and recording of the press’s set process curves, as well as real-time process curves for pressure, temperature, and vacuum. The system can dynamically display individual process parameters, feedback data, and over 30 temperature-pressure-vacuum curves. Additionally, it provides a live display of current furnace product information.

1.2 Data Analysis and Processing Section: Capable of storing 8 years of historical data, this section allows users to query and print product-related data, alarm events, and historical records for each batch—either monthly or daily. It also supports analysis of over 30 types of continuous temperature, pressure, and vacuum curves, as well as real-time data comparison between two batches of products.

1.3 Information Input Section: When product raw materials or varieties need to be changed, enter the relevant product information. The control system features a process curve-setting function, allowing users to create, store, and transmit up to 19 pressure-temperature process curves (each with 30 segments), along with associated instrument parameters.

1.4 System Management Section: Includes password management and data management features for system administrators, process engineers, and operators.

2 Touchscreen Operating System Features

2.1 Press Lifting, Lowering, and Pressure Control: Features both automatic and manual operation modes, with dynamic display of the hydraulic system’s operational status. The automatic mode handles the press’s pressing process automatically, while the manual mode is designed for debugging and troubleshooting, allowing users to set pressure levels, run times, and even configure step-wise positioning for automatic temperature control.

2.2 Temperature Control: Automatic and Manual Settings— When operating in automatic mode, the system automatically manages the entire temperature control process. The manual mode is designed for debugging and troubleshooting; when activated, it allows users to manually step through different temperature settings as needed.

2.3 The cage loading and unloading control system features both automatic and manual functions, with dynamic display of the cage’s operational status. In automatic mode, the system seamlessly completes the entire press machine’s loading and unloading process. Manual mode is designed for debugging and troubleshooting, allowing operators to perform actions such as advancing, retracting, lifting, lowering, and stopping the loading and unloading cages.

Custom-designed, non-standard thermal oil energy-saving systems tailored to meet diverse process requirements based on user needs.