Plastic crystallization Dryer 1. It can be equipped with a dehumidifier to directly perform dehumidification operations; 2. Optional vacuum hopper, suction machine, magnetic base, suction box for conveying operations; 3. Optional screw feeder, which can stably and uniformly convey uncrystallized granular raw materials and PET flakes. In industrial production, many engineering raw materials need to use a crystal dryer for drying. It is important to choose a high-quality crystal dryer.
Plastic crystallization Dryer Equipment principle
Plastic crystallization Dryer The principle of crystallization dryer: The closed cycle drying crystallization machine is used to continuously crystallize amorphous phased materials, and crystallize PET raw materials or recycled materials that have not yet been phased into crystalline raw materials that can be directly dehumidified and dried. The system includes high-temperature heating devices, heat preservation barrels, and constant speed The heavy-duty drive mixing assembly. When the uncrystallized PET raw materials or crushed enter the hopper, they are crystallized and stirred at the same time to prevent the raw materials from agglomerating and reduce the product defect rate. The crystallized plastic can be transported from the bottom of the hopper to the storage barrel or directly transported to the drying barrel for use after drying. 1. The crystal dehumidification dryer has low energy consumption, thin material layer, low spindle speed, low power required by the material supply system and low power consumption. Drying by conduction heat has high thermal efficiency and low energy consumption. 2. The crystal dehumidification dryer is easy to control and has strong applicability. The drying process can be optimized by adjusting the thickness of the material layer, the spindle speed, the number of rake arms, and the size of the rake leaf. Each layer of the drying plate can be individually fed with heating or cooling media to heat or cool the materials, and the temperature of the materials can be controlled accurately and easily. The residence time of the material can be precisely adjusted. The material flows in a single direction, no back-mixing phenomenon, uniform drying, stable quality, and no mixing is required. 3. The crystallization dehumidification dryer has a good operating environment, recyclable solvents, and dust emission meets the requirements Atmospheric pressure type: Due to the low air velocity in the equipment and the high humidity inside the equipment, it is difficult for dust to float to the top of the equipment, so the tail gas from the top temperature exhaust port contains almost no dust. Closed type: equipped with party solvent recovery device, which can easily recover the organic solvent in the wet gas. The solvent recovery device is simple and the recovery rate is low. For materials that are flammable, explosive, toxic and easily oxidized, nitrogen can be used as a moisture-carrying gas for half-circulation to ensure safe operation. It is especially suitable for drying flammable, explosive and toxic materials. Fourth, the crystal dehumidification dryer is easy to install, and has a small footprint. The dryer is integrated from the factory and transported as a whole. It only needs to be hoisted in place, and the installation and positioning are very easy. Due to the vertical arrangement and vertical installation of the drying plate layer, even if the drying area is large, the floor space is small. 5. The crystal dehumidification dryer is easy to operate, and it is easy to drive and stop the dryer. After the feeding is stopped, the raking leaves of the conveying material can quickly empty the material in the dryer. Through the special large-size inspection door mirror, the inside of the equipment can be carefully cleaned and observed. can dry to a moisture content below 0.02%, and solves the shortcomings of poor transparency, sprue sticking, bubbles, silver bars, cracks, poor dimensional stability, internal stress, and insufficient product physical strength.
Dehumidification and drying feeding equipment series are composed of: non-heat dehumidification dryer, heat preservation type drying barrel and all stainless steel suction machine. The suction machine can transport the raw materials from the drying barrel to the forming machine, and can also transport the raw materials from the storage barrel to the drying barrel. According to customer needs, a kind of raw material can be delivered to two molding machines, vacuum motors and safety filter dust collectors are installed inside the machine. According to the production needs of different products, we can provide a powder-removing suction machine to separate the powder in the raw material and capture it. This device has a compact structure and is suitable for the production of precision injection products using engineering plastics such as connectors, precision gears, mobile phone communications, digital cameras and product size requirements, so that the moisture content of the raw materials after wet and dry is low and stable, which can meet strict requirements Technical and quality requirements.
Most engineering plastics are hygroscopic. When the plastic is taken out from the moisture-proof sealed packaging bag and exposed to the atmosphere, it will begin to absorb moisture from the atmosphere.
If it is a conventional hot-air barrel dryer, it is Humid external air can dry the plastic, so it cannot prevent the plastic from continuing to absorb moisture.
1. The internal circulation of the dehumidifier: through the operation of the compressor → discharge high-temperature and high-pressure gas through the exhaust port → enter the condenser for cooling → become a low-temperature and high-pressure gas → pass through the capillary tube → become a low-temperature and low-pressure liquid → evaporate and suck through the evaporator Heat → until the compressor becomes a low-temperature and low-pressure gas. So it goes back and forth.
2. The external circulation of the dehumidifier: under normal startup → through the operation of the fan → moist air is sucked in from the air inlet → passes through the evaporator → the evaporator absorbs the moisture in the air on the aluminum sheet → becomes dry air → Pass through the condenser to dissipate heat → blow out from the air outlet.
Plastic crystallization Dryer application
Plastic crystallization Dryer Crystal dryers are widely used in plastics, chemical, pharmaceutical and other industries. They are characterized by fast crystal drying speed, low energy consumption, can maintain the physical properties of raw materials, and high product molding quality, which not only reduces production costs, but also provides enterprises with It is an economical and practical drying equipment with more economic benefits. The following Hengrong Machinery mainly introduces the principle and application of crystallization dryer.
1. High-quality raw material output, complete structure and controller design, mixing hopper to prevent agglomeration, independently designed mixing blades and positioning rods can ensure that the raw materials are often rolled to crush any clumps that may be formed and prevent Agglomeration of raw materials; 2. Automatic continuous operation and automatic detection of the temperature inside the hopper to ensure the output of high-quality crystalline raw materials; 3. Satisfy the use characteristics of different raw materials, which can be directly processed online or stored in batches after processing the crystalline raw materials for future use; 4. The equipment design is safe, convenient to clean, safe and reliable. With the widespread use of engineering plastics, Dehumidifying dryers have gradually replaced traditional hot air dryers.
This is a device used to dehumidifying plastic resin to achieve drying. For example,
PC,PC/ABS,PC/PBT,PE.HDEPE,LDPE black3%,PE.HDEPE.LDPE black40%,PEEK,PE(1),
Dehumidifier dryerand other plastic resins must be dehumidified and dried during the production process to improve the quality of the finished product.
Plastic crystallization Dryer series are mainly designed for high-efficiency dehumidification of engineering plastics with strong hygroscopicity. Using the honeycomb runner with ceramic fiber as the base material, which represents the highest technological achievements of today, as the core component, the dry air provided can easily reach -40℃ dew point, and ideally it can reach -50℃ or even lower dew point , And the dew point temperature is stable, ensuring the high quality and stability of the molded plastic products. The whole series adopts P.LD. temperature control system as standard equipment; also provides PLC control with LCD touch-sensitive human-machine interface and can monitor the dehumidification effect of the machine Dew point meter is optional, the maximum drying air volume of this product can reach 3000m3/hr. The plastic before molding must be dried to an orientation ratio of less than 0.02%, which is completely bad, sprue adhesion, burrs, bubbles, silver bars, flow marks, cracks, dimensional stability and internal stress. Product defects (for example, insufficient physical properties and strength) are caused by sufficient dehumidification of the plastic before molding. Especially for PET, PBT, PA, PC and other high water absorption plastics, drying equipment with an ultra-low dew point of -40°C is required.
Plastic crystallization Dryer can be dried to a volume ratio of less than 0.02%, which solves the shortcomings of short circuit, gate adhesion, bubbles, silver bars, cracks, poor dimensional stability, internal stress and insufficient physical strength of the product. There are a lot more.
Mainly used in plastic products, automobiles, optical discs, experiments, communications, optics, etc.; the rotary honeycomb can reach a low dew point of zero bai for dehumidification and drying at -40°C. In the case of enhanced configuration, the dehumidification dew point can be as high as -50°C. It is a choice for high-precision industries.
Plastic crystallization Dryer Precautions
Plastic crystallization Dryer 1. The dehumidification dryer must ensure that the hot air is clean. 2. Measures should be taken to prevent coke dust and avoid backflow of hot air. 3. For sticky materials, measures should be taken to minimize wall sticking. 4. The exhaust air temperature is not allowed to exceed the requirements to ensure product quality and safety. 5. During the drying process of materials, all parts of the equipment in contact with materials must be easy to clean and sterilize. 6. In order to improve the solubility, instant solubility, and dry products, they should be continuously discharged from the drying chamber quickly and packaged after cooling.