simple description:This machine is suitable for cleaning and dewatering plastic flakes and granular materials. Its characteristics are as follows:
High degree of dehydration, low power consumption, fast efficiency and highly automated procedures, greatly reducingLabor intensity.Dehumidification dryer
This machine is suitable for cleaning and dewatering plastic flakes and granular materials. Its characteristics are as follows: High degree of dehydration, low power consumption, fast efficiency and highly automated procedures, greatly reducing Labor intensity. Dehydration clean, you can wash away the fine sand and other small debris in the plastic. Advanced production technology, easy to clean, low noise, safe to use, universal use! Made of stainless steel, strong and durable, it is an ideal advanced equipment necessary for enterprises. The equipment produced and sold by our company not only has beautiful appearance, complete system functions, but also simple operation, low energy consumption, advanced technology and complete equipment. Therefore, it can compete in the domestic and foreign markets without any disadvantage. So what is the difference between plastic dehumidifying dryer and ordinary dryer? Under what circumstances is the plastic desiccant dryer produced?
To understand this problem, we must first talk about ordinary dryers. Ordinary dryers use electric heating to heat hot air to dry materials inside the space at a high temperature, so as to evaporate water from the materials. The incoming air heated by the electric heating is the air in the environment. This is what we usually call a hot air dryer.
Therefore, under current weather conditions, incomplete drying of materials will occur. Because electric heating must first heat the incoming air, but the incoming air contains high moisture, how can the material be dried thoroughly? (Mainly reflected in materials with high moisture absorption rate, similar to nylon).
In view of the above situation, firstly, the ambient air is drawn in to remove the moisture in the air at a low dew point, and then relatively dry air is used to heat the material into the dryer to dry the material.
Therefore, the difference between these two dryers is that the moisture content of the inlet air used for drying is different. One has processed the inlet air moisture, and the other has not processed the inlet air moisture.
The parameters of the plastic pellet dryer are different depending on the product, particle size or powder, and the drying and dehumidifying time parameters of the predetermined material are also different. For general, you can check the following comparison table.
plastic granule dryer Equipment principle
Main classification The use of dehumidification dryers can be divided into stand-alone type and centralized type. Stand-alone dehumidification dryers usually include a dryer host, a drying barrel, and a suction machine. The use of a single machine is suitable for a small amount of various drying, and its advantages are good drying efficiency and convenient and fast material change. The centralized dryer includes a dryer host and several drying barrels. Each drying barrel has an independent heating controller, which can dry several different materials at the same time, and cooperates with an air volume regulating valve to control the air volume of each drying barrel. working principle 1. The cycle 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 low-temperature and high-pressure gas → intercept flow through capillary tubes → become low-temperature and low-pressure liquid → evaporate and absorb heat through the evaporator → Return to the compressor to become 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. 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.
plastic pellet 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 pellet material dryer application
1. Dehumidification at room temperature, pressure and humidity (T5 crystallization-38 months; R45%~95%) Environment: generally adopt freezing dehumidification methods (the most primitive methods are wind, sun, fire roasting and lime). 2. Low temperature, normal pressure and humidity, low temperature, normal pressure and low humidity environment: generally use regenerative adsorption rotor for dehumidification. 3. High temperature, normal pressure, normal humidity and high temperature, normal pressure and low humidity environment: Generally, a combination of water cooling and freezing (or wheel dehumidification) is used. Fourth, high-pressure air dehumidification and drying: generally use air dryer filters, special freeze dryers (cold dryers), or use dissolved drying towers. With the widespread use of engineering plastics, plastic pellet Dehumidifying dryers have gradually replaced traditional hot air dryers.
This is a device used to dehumidifying plastic resin to achieve drying. For example,
POM,ABS,TPE,PAL,ABS,CAB,EVA(2),EVOH,LM(4),LCP,PA11,PA6.46.6,PAI,PAR,PBT,
PC,PC/ABS,PC/PBT,PE.HDEPE,LDPE black3%,PE.HDEPE.LDPE black40%,PEEK,PE(1),
PEN,PES,PET,PETG,PI,PMMA,POM,PP,PPO,PPS,PS,[GPPS.EPS.HIPS],PSU,PIT,PUR,
PVC,SAN,SB,TPE,TPE,TPO,TPU,
Material
Initial Moisture Content
Drying Time
Drying temp.
ABS Acrylonitrile Butadiene styrene
0.6%
2~3 H
80℃
PA 6 Polyamide 6
1%
4~6 H
75℃
PA 66 Polyamide 66
1%
4~6 H
75℃
PA 6, 10 Polyamide 6, 106
1%
3~4 H
75℃
PA 11 Polyamide 11
1%
3~4 H
75℃
PA 12 Polyamide 12
1.8%
2~3 H
75℃
PC Polycarbonate
0.36%
2~3 H
120℃
PE Polyethylene
0%
1 H
90℃
PE Polyethylene w/carbon black
0.5%
3~6 H
85℃
PET Polyethylene Terephthalate
0.4%
3~6 H
160℃
PETG Polyethylene Terephthalate Glycol
0.1%
6 H
66℃
PBT Polybuthyleneterephthalate
0.4%
3 H
160℃
PI Polyimide
0.32%
3 H
120℃
PMMA Polymethylmethacrylate
0.7%
2~4 H
80℃
PSU Polysulfone
0.22%
3 H
120℃
POM Polyoxymethylene
0.25%
3 H
100℃
PP Polypropylene
0%
1 H
90℃
PPO Polyphenyleneoxide (Norl R)
0.13%
3 H
120℃
PS Polystyrene
0%
1 H
80℃
PUR Polyurethane
0.9%
3 H
90℃
PVC Polyvinyl Chloride
0.4%
1 H
70℃
SAN Styrene Acrylonitrile Copolymer
0.3%
2~3 H
80℃
SB Styrene Hi-impact
0.6%
2 H
80℃
lonomer(SurlynR)
1%
2~8 H
50℃
VPE Crosslinked Polyethylene
2%
6 H
50℃
KODAR PETG 6763
1.8%
4 H
66℃
PES Polyester
0.6%
4 H
75℃
CA Cellulose Acetate
1.3%
2~3 H
75℃
CAB Cellulose Acetate Butyrate
1.3%
2~3 H
75℃
CP Cellulose Propionate
1.3%
2~3 H
75℃
lonomer
1.4%
2~3 H
90℃
Dehumidifier dryerand other plastic resins must be dehumidified and dried during the production process to improve the quality of the finished product.
plastic pellet 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 pellet 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 pellet dryer Precautions
plastic dryers are generally used in industrial production to dehumidify and dry raw materials with strong hygroscopicity to ensure high product forming rates. In the past, companies used traditional hot air blowers. If they encounter wet weather, the hot air blowers can hardly complete the drying purpose. The desiccant dryer came into being to improve the disadvantages of the hot air blower. So what is the difference between a dehumidifying dryer and an ordinary dryer? 1. Traditional hot air blower In order to evaporate the moisture in the material, the traditional hot air blower will use the hot air heated by electric heating to dry the material at high temperature. However, due to weather factors, dry weather and humid weather, the moisture content in the air will be different, and the drying effect will also be different. In traditional hot air blowers, electric heating must first heat the incoming air. If the weather is too humid and the incoming air contains high moisture, it is difficult for the material to dry. 2. Dehumidification dryer The dehumidification dryer effectively improves the shortcomings of ordinary dryers. It first draws in ambient air to remove moisture in the air under low dew point, and then heats the dried air to the dryer to dehumidify and dry the material. The work efficiency is greatly improved, the drying time is reduced, and the drying effect is better. The air pipeline of the desiccant dryer adopts a closed circulation system, which can not be affected by the external weather, and the material can be dried well regardless of whether it is dry or humid. The filter installed in the desiccant dryer can prevent dust leakage from causing pollution in the factory and keep the air environment clean. Generally speaking, the difference between these two dryers is that the moisture content of the inlet air used for drying is different. One has processed the inlet air moisture, and the other has not processed the inlet air moisture. (1) Ensure that the hot air is clean.
(2) Measures should be taken to prevent coke dust and avoid backflow of hot air.
(3) During the drying process of the material, all parts of the equipment in contact with the material must be cleaned and disinfected.
(4) For viscous materials, measures should be taken to minimize sticking.
(5) 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.
(6) The exhaust air temperature is allowed to exceed the requirements to ensure product quality and safety.
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