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Mold temperature controller(MTC), also known as mold temperature machine, was originally used in the temperature control industry of injection molds. Later, with the development of the machinery industry, mold temperature controllers were used more and more widely. Now mold temperature controllers are generally divided into water mold temperature controllers and oil mold temperature controllers. If the selected mold temperature controller matches the temperature requirements of product molding, it can greatly improve the quality of the product and reduce the operating cost of the product.   So how to choose a mold temperature controller that matches your process requirements? Before making a purchase, consider the following important factors to ensure your system fits your production needs. Selecting the Right Mold Temperature Controller Selecting the right mold temperature controller requires evaluating your process needs. Consider the heat transfer medium, cooling method, and the required temperature range for your application. Assess the mold size and heat capacity, pump flow and pressure, and the capabilities of the control system. Don’t forget safety features and balance the purchase cost versus operating cost. Addressing these factors ensures consistent mold temperature, reliable performance, and long-term efficiency. 1. Heat transfer medium: thermal oil / water. Water mold temperature controller: Water-type mold temperature controller uses water as a heat transfer medium and is suitable for occasions where the temperature control requirement does not exceed 200°C. Its advantages are high heat transfer efficiency, environmental friendliness, and relatively low cost. Oil mold temperature controller: Oil-type mold temperature controller uses oil as a heat transfer medium and is suitable for high-temperature occasions. The temperature control range can reach 350°C. Oil type mold temperature controllers are suitable for industries with high temperature control requirements, such as the hot pressing mold industry.   2. Cooling method: direct cooling / indirect cooling Direct cooling: Direct cooling is suitable for applications that require rapid cooling, such as certain plastic processing processes. This method can quickly reduce the temperature of the heat transfer medium and improve production efficiency. Indirect cooling: Indirect cooling uses a cooling circuit separated from the main circuit. It is suitable for applications that require more precise temperature control, such as precision mold processing. With an independent cooling circuit, temperature changes can be controlled more finely.   3. Temperature control range: low temperature application / high temperature application Low temperature application: Taking the plastics industry as an example, due to its relatively low temperature requirements, water mold temperature controllers(MTCs) can meet the requirements. The temperature control accuracy of water temperature controllers is roughly ±1℃, which is sufficient to meet the needs of most industrial application scenarios. High temperature application: In the case of high temperature applications, such as rubber pressing or metal casting, where high temperature control is required, oil mold temperature controllers(MTCs) are suitable. Oil type mold temperature controllers can not only achieve a wider temperature control range, but also perform better in thermal stability.   4. Mold size and heat capacity Large molds often require mold temperature controllers(MTCs) to have sufficient heating or cooling power to quickly reach and maintain the required temperature. Molds with large heat capacity require more energy during heating or cooling. For example, a large automotive parts injection mold has a much larger heat capacity than a small plastic toy mold, so a more powerful mold temperature controller(MTC) needs to be selected. The heat capacity can be estimated by calculating the volume of the mold and the specific heat capacity of the material, thereby determining the appropriate mold temperature controller(MTC) power.   5. Pump flow and pressure The flow of the circulation pump determines the circulation speed of the heat transfer medium (such as water or heat transfer oil) between the mold and the mold temperature controller(MTC). Insufficient flow will cause uneven mold temperature and affect product quality. Generally speaking, the flow rate is determined according to the size and complexity of the mold. For small molds, a circulation pump flow of 10-30L/min may be sufficient, while a large and complex mold may require a flow of more than 50L/min. The pressure of the mold temperature controller(MTC) must be able to overcome the resistance of the pipeline and the resistance inside the mold to ensure the smooth circulation of the heat transfer medium. If the pressure is not enough, local overheating or overcooling may occur. When selecting a mold temperature controller(MTC), consider the impact of factors such as the mold's pipeline length, pipe diameter, and number of elbows on the pressure. To meet the needs of different molds.   6. Control system Hengde mold temperature controller(MTC) adopts imported microcomputer control mode. According to customer requirements, PLC control and RS485 communication function can be selected to achieve automatic management.   7. Safety Check whether the mold temperature controller(MTC) has perfect safety functions, such as overheat protection, leakage protection, overload protection, etc. For industrial occasions with dangerous environments such as flammable and explosive gases, steam, dust, etc., such as chemical, oil and gas, pharmaceutical and other industries, when purchasing a mold temperature controller(MTC), you also need to consider the explosion-proof function and choose Hengde's explosion-proof mold temperature controller(MTC).   8. Purchase cost / operating cost Compare the prices of mold temperature controllers of different brands and functions. Under the premise of meeting the application requirements, choose the most cost-effective mold temperature controllers(MTCs). At the same time, the operating cost of the mold temperature controller(MTC), including energy consumption, maintenance costs, etc., should also be considered. When purchasing a mold temperature controller(MTC), it is important to choose a manufacturer that offers comprehensive warranty coverage and reliable after-sales support, including timely technical assistance and accessible maintenance services. For more guidance on selecting the right manufacturer, check out our blog: How To Choose A Mold Temperature Controller Manufacturer?   Summary Table: Key Factors for Choosing a Mold Temperature Controller (MTC) Factor Options / Considerations Key Notes Heat Transfer Medium Thermal oil / Water Water Mold Temperature Controller(MTC): ≤200°C, high efficiency, eco-friendly, lower cost. Oil Mold Temperature Controller(MTC): up to 350°C, suitable for high-temp applications. Cooling Method Direct / Indirect Direct: fast cooling, improves efficiency. Indirect: precise temperature control, fine adjustments. Temperature Control Range Low-temp / High-temp Low-temp: plastics, water MTC ±1°C accuracy. High-temp: rubber, metal casting, oil MTC, wider range & better stability. Mold Size & Heat Capacity Small / Large molds Larger molds require more heating/cooling power; calculate mold volume × material specific heat to estimate required power. Pump Flow & Pressure Flow rate & system pressure Ensure sufficient flow for even temperature; pump must overcome pipeline & mold resistance. Control System Microcomputer / PLC / RS485 Automatic control, communication functions, and customer customization options. Safety Overheat, leakage, overload, explosion-proof Critical in industrial or hazardous environments; choose explosion-proof models if needed. Cost Purchase cost & operating cost Consider initial investment, energy consumption, maintenance, warranty, and after-sales support.   For more questions about the purchase of mold temperature controllers(MTCs), please visit Hengde's website (www.hengdechiller.com). Choose Hengde, Choose Perfect Mold Temperature Controllers!

Industrial chillers are widely used in industrial refrigeration equipment. Their maintenance is very important to ensure their normal operation and extend their service life. The specific maintenance measures and cycles are as follows:   Daily maintenance of the industrial chillers Wipe the outer shell of the chiller regularly to check for signs of damage, deformation or corrosion. Check whether there are blockages at the inlet and outlet of the chiller, such as dust, debris, etc. If there is a blockage, it should be cleaned in time to ensure good ventilation. Check whether the pipe connection of the chiller is firm and whether there is damage, deformation, or leakage on the appearance. Especially for pipe joints, valves and other parts, ensure good sealing. If there is a problem, the pipe should be replaced in time to prevent leakage or affect the cooling effect. Check the operating status of the chiller, such as whether the compressor, water pump and fan have noise and abnormal sounds. Check the outlet water temperature and return water temperature of the chiller to ensure that the temperature is within the set range. Check the pressure of the system, including the refrigerant pressure and water pressure, to ensure smooth water circulation.   Regular maintenance of the industrial chillers For some important parts of the chiller, special attention should be paid during maintenance: 1. Condenser of the chiller The condenser of the water cooled chiller is prone to scaling, and the condenser of the air cooled chiller is prone to dust accumulation. These two factors will not only affect the heat dissipation effect of the chiller, resulting in a decrease in cooling capacity, but will also affect the increase in the power of the chiller and easily damage the compressor of the chiller. Therefore, the condenser must be cleaned regularly, and the specific maintenance time should be determined according to the actual use environment of the customer.   2. Compressor of the chiller After the compressor of the chiller has been running for 1,000 hours, check whether the compressor refrigeration oil is normal; whether the current is normal during operation; and whether there is any abnormal sound during operation.   After the machine has been used for a certain period of time, due to various factors, the pressure switch needs to be tested to see whether it can alarm high and low pressures. For the electric control box, the dust inside should be blown clean regularly, and the screws should be checked for looseness to avoid damage to the machine.   Attached is the regular maintenance schedule for common parts of Hengde chillers Item Maintenance Period Clean the condenser 3 months Check the chilled water pump 3 months Check the wires (corner insulation)  1 month Check the cooling water supply (water-cooled) 1 week Check various safety protection devices 1 month Check the operating current of the compressor and water pump 3 months   Choose Hengde, Choose Perfect Industrial Chillers!

Hengde mold temperature controllers are widely utilized in a diverse range of industries. Such industries encompass plastic & rubber manufacturing, the chemical field, electronic production, food & beverage, the wood board industry, die casting, printing, and many others.   How to maintain it? Hengde mold temperature controller maintenance is mainly divided into daily inspection and regular maintenance.   Daily Inspection: 1. Check the mold temperature controller housing and control panel to keep them clean and dry, and avoid using detergents containing acidic and alkaline substances to wipe stains. When wiping the inside with a rag, pay special attention not to damage the electrical parts. 2. Check whether each component is normal, such as checking whether the temperature display of the mold temperature controller is normal, checking whether the parameter setting of the controller has changed; whether there is leakage at the pipe connection, and check whether there is liquid dripping or moisture at the joint. Observe whether the oil pump, water pump and other running parts have abnormal noise or vibration. The sound should be stable and there is no obvious shaking during normal operation. Check whether the cable is damaged or worn, and replace it in time if necessary.   Regular Maintenance: Perform in-depth maintenance on the mold temperature controller every certain period of operation (according to the requirements of the equipment manual). The following is the maintenance time of each accessory: Item Maintenance Period Maintenance Solenoid valve 1 month (actual operation 600 hours)  Dismantling and cleaning Liquid level switch 1 month (actual operation 600 hours)  Dismantling and cleaning Mold connection hose 2 month (actual operation 1200 hours) Dismantling and cleaning Noise / strange smell / heat Every day No Noise / Vibration Loose terminals 3 months Inspect and tighten Dust and garbage in control cabinet 1 month Clean Electromagnetic contactor (Pump)  3 years Replace Liquid level display tube Every day Check for proper amount Heat transfer oil 6 months Replace PC board  3 years Replace Pump 1 year(Every day)  Confirm noise Pipeline 1 month  Check and confirm no oil leakage   Special Precautions: 1. It is best to clean the equipment return filter once a month. After the test machine is completed, it is best to clean it several times before normal use. 2. Tighten the screws of all electrical parts of the equipment once a month (especially the contactor, because the long-term operation of the mold temperature controller may cause the screws to loosen); 3. Before shutting down, it is recommended to lower the temperature of the water mold temperature controller to below 40℃ and the temperature of the oil mold temperature controller to below 80℃ before shutting down, which can extend the service life of the pump and heating tube. 4. If the customer's equipment pipeline is higher than the oil tank of the Hengde mold temperature controller, the oil tank can be raised, or the inlet and outlet valves can be turned off first, and then shut down to prevent backflow when the circulation pump is not working.   Choose Hengde, Choose Perfect Mold Temperature Controllers!

In recent times, the advancements in shipbuilding technology and the growth of offshore fishing have led to increased focus on marine water chillers. These marine chillers are essential for maintaining the freshness of caught fish, ensuring they remain in good condition until they are unloaded ashore or processed further on the ship.   The operational principle of marine chillers resembles that of their land-based counterparts. A compressor is used to transform low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas. This is then sent to the condenser, where heat is dissipated via a cooling medium, typically seawater, causing the refrigerant gas to condense into a liquid. The liquid refrigerant, after passing through a throttling device to reduce its pressure, enters the evaporator. Here, it absorbs heat from the cooled medium, such as air or water, thereby achieving the refrigeration effect. The cooled medium is then piped to the equipment or system requiring cooling, completing the cooling cycle. Hengde Marine Chillers 40HP Marine Chillers 15HP Marine Chiller 10HP Marine Chillers   The key components of marine chillers include compressors, condensers, evaporators, throttling devices, and control systems. The compressor is the central part of a marine chiller, with common types being piston, reciprocating, screw (semi-closed or open), or scroll compressors. The condenser usually has a shell and tube structure, often made of nickel-copper on the inside, and uses seawater as the cooling medium. To safeguard against seawater corrosion, corrosion-resistant materials like titanium alloy or stainless steel are employed. The evaporator typically has a shell and tube or plate structure and can be made of stainless steel based on customer requirements. Its design must consider the spatial constraints and cooling needs of the ship, aiming for efficient heat exchange, compact size, and light weight.   Hengde, as a specialized manufacturer of marine chillers, has assisted numerous fishing enterprises in resolving fish storage issues. A notable example is the case of a Maldivian customer. Five years ago, a Maldivian marine shipyard contacted us. Their clients reported that the ships in operation lacked refrigeration equipment, resulting in a large number of caught fish perishing due to temperature differences. Consequently, they intended to install marine chillers on all their ships. Since the installation of our marine water chillers, the water temperature has been kept at an appropriate level, ensuring the fish stay fresh. The performance and capabilities of our marine chillers left a profound mark on the customer. They are now constructing a new shipbuilding factory and plan to equip all future ships with Hengde's marine chillers.   Choose Hengde, Choose Perfect Marine Chillers!

During the installation of the mould temperature controller, great care must be taken to avoid any damage to the unit. Adequate space around the mould temperature controller should be allocated in a rational manner to ensure convenient access for its maintenance and servicing. The cooling water system ought to be meticulously designed and installed in strict accordance with the national standard piping system design and construction installation criteria, thereby maximizing the performance of the mold temperature controller.   1. Water Mold Temperature Controllers The heat transfer medium for the water mold temperature controller must be a pristine water source, free from sand, soil, or other contaminants. If groundwater is utilized, it should be softened. The circulating water should be replaced on a regular monthly basis. Water with impurities can readily clog the pipelines and inflict damage on the machine. Unsoftened water is prone to scale formation, which severely impairs the heating and heat transfer efficiencies and diminishes the service life of the heating tubes.   2. Oil Mold Temperature Controllers Prior to operation, it is essential to employ high quality, clean, and heat transfer oil of a unified brand. Brands such as Mobil, Esso, and Total are recommended. The use of inferior heat transfer oil can lead to heater fouling and burnout, pump impeller wear, and a reduction in flow rate, consequently shortening the normal service life of the equipment. The oil mold temperature controller machine should not be moved casually while it is in operation. If the mold temperature controller requires repair, the oil temperature must be lowered to below 80℃ (176℉)  before any repair work can commence. The potential causes of motor overload include power phase loss, pipe blockage, and bearing damage. When the motor is overloaded, the motor overload relay will automatically trip and halt the machine to safeguard the motor. The alarm can be cleared by pressing the "Reset (green button)" switch on the overload relay. Before shutting down the pump, it is necessary to wait until the oil temperature has dropped below 80℃ (176℉)  ; otherwise, its service life will be adversely affected. To achieve a stable control temperature, the cooling water pressure should be maintained within the range of 1 - 3 kg/cm².     In conclusion, correct installation, proper heat transfer medium management, and strict adherence to operational guidelines are vital for the performance and durability of water and oil temperature controllers. Following these instructions and precautions ensures reliable operation, reduces malfunctions, and boosts productivity. Regular maintenance and performance monitoring enhance efficient and sustainable use, protecting the investment in Hengde mold temperature controllers.   Choose Hengde, Choose Perfect Mold Temperature Controller!

A mold temperature controller (MTC) plays a key role in stabilizing mold temperature and ensuring consistent product quality in injection molding, die-casting, extrusion, hot-pressing, and many other industrial processes. Whether you are using a water mold temperature controller (MTC) or an oil mold temperature controller(MTC), equipment failures can quickly disrupt production and lead to higher scrap rates or machine downtime.   To help operators deal with issues more efficiently, this article summarizes common failure points and practical solutions. Below is the troubleshooting table used by most technicians for quick diagnosis.   Common Problems for Mold Temperature Controllers (MTCs) Common Problems Cause Solutions 1. Unable to start, no fault indicator light. 2P2A Circuit breaker tripped Open the circuit breaker to check the cause. Phase loss Check the power cord. Transformer burnt Replace the transformer. 2. The indicator light for lack of media is on. The cooling water is not turned on or the pressure is insufficient Open the cooling water valve and check the pressure. Pressure switch problem Adjust the pressure switch or replace it. Insufficient heat transfer oil Add heat transfer oil 3. Pump overload light on. System overload Check whether the hot water inlet and outlet valves are open and press the reset button; Clear the scale of the electric heater. The power supply voltage is abnormal or the phase is missing Use a three-phase meter to measure the three-phase voltage; Check whether the power supply terminal is loose and tightened, and press the reset button. 4. The temperature is too high and cannot be cooled. The solenoid valve is blocked Clean the solenoid valve The solenoid valve coil is aging or damaged Parts need to be replaced. 5. Unable to heat or reach a certain temperature and no longer rise Solenoid valve is blocked or damaged Clean the solenoid valve or replace accessories. Heating tube burns out Replace the heating tube. 6. The fault light is on and the alarm does not sound Alarm failure Replace the alarm. Note：If the mold temperature controller is overheating, please see our other article: "Troubleshooting Guide: Mold Temperature Controller Overheating Issues".   Why These Problems Occur Most issues with a mold temperature controller (MTC) come from wear, improper settings, incorrect installation, or unstable cooling/heating supply. For a water mold temperature controller (MTC), cooling-related failures—such as solenoid valve blockage or insufficient water pressure—are more common. For an oil mold temperature controller (MTC), high-temperature components such as thermal oil, coils, and heating tubes require more frequent inspection. Regular cleaning, checking of electrical connections, and monitoring temperature accuracy can effectively prevent most failures. How to Prevent Mold Temperature Controller Problems Here are some effective preventive methods to keep your mold temperature controller (MTC) running smoothly: 1. Maintain stable cooling water pressure Especially important for water mold temperature controllers (MTCs), as insufficient flow will cause overheating. 2. Use high-quality thermal oil For oil mold temperature controllers (MTCs), poor-quality thermal oil can carbonize, leading to blocked pipelines and heater damage. 3. Clean heat exchangers and pipelines regularly Scale buildup reduces heat-transfer efficiency and may trigger overheating alarms. 4. Check electrical components Loose wiring, aging relays, or unstable voltage can cause frequent restarts, alarms, or shutdowns. 5. Ensure correct set temperatures Incorrect setpoints can make the controller continuously heat or cool, increasing wear and error rates. Conclusion A mold temperature controller(MTC) is a key device for precise temperature management. By understanding and addressing these common faults and their corresponding solutions, users can ensure the smooth and efficient operation of mold temperature controllers (MTCs), maximizing their productivity and minimizing downtime.    Whether you are using a water mold temperature controller (MTC) or an oil mold temperature controller (MTC), proper maintenance and timely troubleshooting will significantly improve performance.   If you need support or want a customized temperature control solution, our technical team is ready to help (www.hengdechiller.com).    Choose Hengde, Choose Perfect Mold Temperature Controller! Hengde Water Type Mold Temperature Controllers  Hengde Oil Type Mold Temperature Controllers