After the plastic particles are heated and melted, they are injected into the mold. After condensation, the mold is opened and ejected to form the plastic workpiece. It is necessary to cool the mold in the continuous production process, so as to shorten the plastic setting time, improve the dimensional accuracy of the workpiece, molding quality and surface quality.
Frozen water temperature requirements: 6… 18 ℃
Requirements for temperature difference of frozen water: ± 2K or ± 0.5K
The cooling capacity of the chiller is related to the injection volume of the injection molding machine (usually referred to as “Anders”). The larger the injection volume, the greater the cooling capacity required.
The injection molding machine is usually nominal by the “tonnage” of the clamping force, which requires the “tonnage” to be converted into “ampere”, but the “tonnage” and “ampere” do not correspond one by one. The comparison table below is only the conversion relationship under general conditions, with a certain upper and lower deviation.
Extruded pipes, trunking, cables and various plastic profiles.
After the heated melting raw materials are formed by the mold, they are cooled by a frozen water bath, and the water temperature in the frozen water bath must be kept constant.
Due to the high production speed, large cooling capacity units are required.
As the existing frozen water tank is large enough, the unit may not be equipped with water tank.
It mainly produces all kinds of mineral water bottles and water bottles.
Compressed air drying – bottle blowing requires clean and dry compressed air. The water in the compressed air can be removed by using the frozen water provided by the industrial chiller as the cold source.
Mold cooling – cold water can accurately control mold temperature, improve product quality and production efficiency
Compressed air drying and mold cooling can use the same chiller as the cold source
The most common products are few containers, such as yogurt cups
When plastic is extruded by a die heated at a constant frequency, it is very important to maintain a constant temperature. The temperature difference range of chilled water is very high. Therefore, a proportional chilled water valve is needed to accurately adjust the temperature.
Mold opening, mold closing and material injection need to be completed by the hydraulic system. The hydraulic oil absorbs the energy of the hydraulic pump and the temperature rises. Generally, the oil temperature cannot be higher than 60 ℃.
The cooling water temperature is about 27 ℃. Since the required water temperature is different from that of the mold, the electric water valve needs to be separated from the mold cooling circuit or an independent cooling system.
Product application editing voice
The chiller is applied to CNC machine tools, coordinate boring machines, grinding machines, machining centers, modular machine tools and various precision machine tools. It can accurately control the oil temperature, effectively reduce the thermal deformation of the machine tool and improve the machining accuracy of the machine tool.
Product features editing voice
This series of chillers adopt multi machine combined technology to improve the performance of chillers
1. Stable performance: multiple compressors are used in parallel, and each compressor is equipped with an independent refrigeration circuit, that is, the evaporator and condenser are completely independent; All compressors are commanded by a unified microcomputer control system to start and shut down one by one without mutual interference. In addition, all the machines of this brand are made of original genuine products, and the single machine failure rate is very low. Combined with the above reasons, it can ensure that this series of machines have highly stable performance and are the first choice under long-term continuous operation without purchasing other standby machines.
2. Power saving and energy saving: multiple medium and small power compressors are used in parallel, with minimal interference to the power grid during startup and shutdown. With the change of load, the unit will automatically determine the number of startup to ensure that the started compressors are in the best working state, so as to effectively save electric energy.
3. Long service life: the evaporator and condenser are designed reasonably and placed above the compressor. During the whole operation process, most of the lubricating oil always stays in the compressor to ensure good lubrication of the compressor.
Scope of application: plastic products, hardware, chemical industry, electronics, food preservation, laser engraving, vacuum coating, ultrasonic cleaning; High power chillers are widely used in hotels and office buildings for central air conditioning, plastic cooling, food preservation, bath temperature rise and fall, medical storage and other industries.
Post time: Sep-09-2021