The HRL series air cooled screw type chiller has an extensive range of application in the production of lithium batteries, PV solar energy products, plastics, electronics, chemicals, pharmaceuticals, lasers, and electroplating products.
Refrigeration range: 79400kcal/h~1720000kcal/h;
Temperature range of outlet chilling water: 5℃~20℃
In addition to standard specifications, a variety of special units can be customized as required.
1. Strong adaptability: no need to install a cooling tower, cooling water pump or other equipment, suitable for areas that lack water resources and have poor water quality.
2. Easy installation: convenient installation, short engineering cycle.
3. Space saving: can be installed on the top of building, rooftop and other open space, no need for special machine space.
4. Intelligent control: fully automatic computer control, without need for manual monitoring, can realize remote or centralized management to save management cost.
5. The unit is equipped with reverse protection, motor overload protection, high low voltage protection, low temperature protection and water flow protection and other protection devices.
6. With high quality compressor, condenser, evaporator and other components, the refrigeration capacity is sufficient and the refrigeration efficiency is high.
Why are chillers needed in the process of plastic molding?Conventional model selection method of chillers for injection molding machine
1. Molds act as heat exchangers. Heat transfers from molten plastic into the mold, and then from the mold into the continuous circuiting cooling medium --- cooled water (chilled water). only a small part enters into the air and the die of injection molding machine. It is well known that most of the mold forming time is about cooling and some can account for more than 80% of the plastic molding cycle, therefore, controlling the cooling time to a minimum is absolutely necessary.
2. For example, the molding cycle of a mold usually takes 20 seconds, which can be reduced to 16 seconds, if the water in the original cooling tower is replaced by chilled water generated by the chiller. Therefore, as though configuring chiller increases the cost, it greatly improves the production efficiency of the injection molding machine.
3. The chiller’s refrigerating capacity needed by a mold is related to the specific heat capacity of the molding material, the temperature of the sol, weight, and the temperature at product demolding, and the calculating formula is: Q＝M×C×T×S.
Q: Required refrigerating capacity (unit: kcal/h)
M: The weight of the plastic material required for production per unit time (unit: kg/h)
C: Specific heat of plastic material (unit: kcal/kg.℃ )
T: Temperature difference between the sol-gel temperature and the temperature at product demolding (unit:℃)
S: Safety factor (generally take 1.35-2). When a single machine matches, a small value is generally chosen; when a chiller is matched with multiple injection molding machines, a large value is selected. If the air cooled unit is selected, S should also be selected larger.
Model selection method of chillers in key link of industrial equipment cooling1. Calculate the calorific value from the output loss of the high axis motor (only suitable for the spindle cooling)
Q: calorific value (unit: kW) η: heat loss of spindle (30%)
For example: the calorific value of 10kW spindle motor Q＝10×0.3＝3kW
Q: calorific value (unit: kW) C: specific heat of water C＝1kcal/kg.℃ ρ: density of water ρ＝1000kg /m3/h V: flow rate (unit: m3/h) △T: temperature difference of inlet and outlet water (unit: ℃)
For example: △T＝T2－T1＝5℃V＝2.0m3 /h
Hejin is a plastic industry manufacturer, we manufacture include resin dryers, PET crystallizers, industrial chillers, plastic materials pre-dehumidification system, resin blenders and mixers, also offer all plastic processing individual machines like material hopper, feeders and collectors, we have custom-made service business, according to your need to make all the plastic processing machines and resin equipment for you, we are a leading plastic product manufacturer in China, and experienced by more than 25 years focused on the plastic industry, we are after considering all related then offering good quality plastic products.
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