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Different materials with different properties, they have different processing characteristics, Mold Temperature on the quality of the workpiece sheet liquidity, contraction rate, injection molding cycle is Plastic Processing factors that must be controlled. Research shows that 24% of the waste caused by inappropriate mold temperature. Therefore, from injection molding, blow molding to extrusion of various Plastic Process is widely used in the field of mold temperature control system has to be mold heated to operating temperature, mold temperature and to maintain a certain degree of accuracy range. However, if mold control system design, improper use, not only can improve the efficiency of the product shape, stability, product quality and lower defect rate, but also resulted in the improvement of other equipment automation meaningless. Correctly select the appropriate mold temperature control system can take into account the following aspects. Determine the requirements of plastic processing mold temperature Requirements of various plastic materials, the processing molding temperature, mold temperature is different. "All kinds of plastic processing mold thermometer" gives some of the major plastics processing required mold temperature. OK Mold temperature The heat transfer media type Mold temperature control system works is, pump-driven heat transfer medium (usually water or oil) with built-in heater and cooler from the tank to reach die, then die back from the water tank. Controller based temperature sensor measuring the thermal fluid temperature, and / or die internal temperature, adjust the temperature of hot fluid to regulate temperature of the mold. Used heat transfer medium according to the type of mold temperature for the water-type mold temperature, mold temperature pressurized water or oil-type mold temperature. General type mold temperature control water temperature lower, oil type mold temperature control of the higher temperature range. Water type mold temperature operating temperature was 90 , mold temperature pressurized water reactor operating temperature is 160 ~ 180 , mold temperature controller for oil-type operating temperature 150 occasions, maximum working temperature of 350 . On the heat transfer medium itself, with water as heat transfer medium Economy Environmental protection Even if a leak can also be directly discharged, will not pollute the environment, but the water tends to tank, flow corrosion and scaling, so in addition to doing anti-corrosive pretreatment, the rust is in use even on a regular basis. To conducting oil as heat transfer medium, the thermal conductivity of water only 1 / 3, the relatively high cost, easy to coke. Specific application environment is chosen mold temperature factors to be considered. If oil temperature machine processing in the optical lens is limited, because the oil heat evaporation will affect the quality of optical lenses. Temperature control accuracy Make the injection process in the mold temperature is kept almost constant, the key is to control the balance between heat conduction within the mold. Internal mold caused by the thermoplastic heat transfer by heat conduction to the mold, the heat conduction to the mold part of thermal radiation through a direct loss in the air and partly with the mold temperature of heat exchange, transfer to the heat transfer medium (water or oil). Mold temperature control to achieve, there are hot fluid temperature based on mold temperature control, mold temperature on mold temperature control, and joint mold temperature control in several ways. Users should be selected according to study mold temperature operation to achieve, choose to meet their precision temperature control products. Mold temperature based on thermal fluid temperature control, temperature control panel display and the mold temperature is not uniform, due to injection period, injection speed, melt temperature and environmental temperature does not get compensation, the mold is relatively large temperature fluctuations. Hot fluid temperature model based on temperature control to meet most requirements, but also the most common method. Mold temperature on mold temperature control, the internal temperature sensor installed in the mold, the control panel settings, the temperature of the mold temperature line for high precision temperature control of the situation. Joint control over synthesis method for high-precision plastic processing. In the joint control, temperature sensors placed in position in the mold must be considered mold shape, structure and location of the cooling channel will be placed in the processing of cases where the quality of play a decisive role. Present, most mold temperature control using PID technology, the various factors affecting mold temperature compensation. Matching process in the mold temperature, the heating power and the media cycle of pressure and flow are also to be taken into account. Calculation of heating energy Which: The energy required to heat mold P (kW) W Mold weight (kg) C mold specific heat (kcal / kg ) T1 required mold temperature ( ) T2 start production mold temperature ( ) S safety factor, value of 1.5 ~ 2 T die from the start of production to achieve the required temperature and time (h) Media pressure cycle required Finer mold, the greater the pressure needed, and be coupled with impedance of flow. P = 0.1 × H × P pressure (kg/cm2) H head height (m) heat transfer medium heat. Water = 1; oil = 0.7 ~ 0.9 Media circulation flow required Gas flow rate and the better heat transfer. L media needed to flow loop (L / min) Q die or be moved out of the heat (kcal / h) C heat transfer medium heat. Water = 1; oil = 0.7 ~ 0.9 T cycle of media and out of the mold temperature ( ) share of the media cycle Typically, mold temperature controller professional pump manufacturer will provide its product characteristics and mold temperature models feature comparison, these are choices mold temperature reference. Yan State to explain the product. Identified the need to reach the temperature range: "all kinds of plastic processing mold thermometer" to mention some of the major plastics processing mold temperature required, the user needs according to processing requirements, identified the need to reach the temperature range. Heat transfer medium of choice: Control temperature range generally lower water temperature, oil temperature, the higher temperature range machine control. The mold temperature, the additional use of water as heat transfer medium should be chosen YBM-D Series; such as using oil or water as heat transfer media, you should choose YBM-I type. Under the "Model Menu" in the maximum heating time allowed to choose the most suitable model. Such as: mold weight 120kg, mold temperature needs to be achieved within 25 minutes 120 , YBM-1IH (high temperature) is the best choice; Mold weight 120kg, mold temperature needs to be achieved within 10 minutes 120 , YBM-2IH (high temperature) is the best choice; Mold weight 120kg, mold temperature needs to reach in 25 minutes 80 , YBM-1D or YBM-1I The e-commerce company in China offers quality products such as cheap wifi enabled phones , China wifi enabled mobiles, and more. For more , please visit mobile phone with wifi today!
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