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ABS polymer dryer parameter
ABS-Dehumidifying dryer
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Plastic
material |
Dryer |
Density
(kg/dm3) |
Drying time（h) |
Drying temperature
(℃) |
Atmospheric flow(m3/kg） |
Moulding moisture content(%) |
Initial moisture contnt(%） |
| ABS |
√ |
0.55 |
2-3 |
85 |
2 |
<0.020 |
< 0.2 |
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ABS polymer dryer Equipment principle
ABS-Dehumidifying dryer
Dehumidification and drying part: The hot and humid air coming back from the drying barrel is cooled and blown into the honeycomb runner. The moisture in the air is adsorbed by the runner and then desorbed by the regenerated heated air. The two airflows act on the runner at the same time, and with the rotation of the runner, the moisture in the air is continuously adsorbed and desorbed by the regeneration air to be discharged, forming stable low dew point air, which is heated to The drying temperature of the plastic is blown into the drying barrel to form a closed cycle to dry the raw materials.
Suction part: Suction is sucked into the dry bucket from the storage bucket or other storage silo container. When the reed switch of the vacuum hopper detects that there is no material, the suction motor runs to generate a vacuum in the vacuum hopper. The raw materials in the storage bucket are sucked into the vacuum hopper due to the air pressure difference. When the suction time is completed, the suction motor stops running, and the raw materials fall into the drying bucket due to their own weight. The dried raw materials are drawn from the drying material barrel to the electric eye hopper installed in the plastic molding machine. 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.
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ABS polymer dryer application
ABS-Dehumidifying dryer
1.ABS dehumidification, drying and feeding combinations are all equipped with honeycomb runners, which can obtain stable and stable first dew point dry air. The shape is divided into two types: semi-open and fully sealed;
2. Suitable for factory plastic materials with strong hygroscopicity such as PA, PC, PBT, PRT, etc.;
3. It integrates three functions of dehumidification, drying and two-stage feeding, and can choose three-stage feeding function;
4. The heat preservation type drying barrel adopts the design of lower blowing pipe and is equipped with a cyclone exhaust device to prevent heat loss, ensure temperature and improve drying efficiency;
5. All machines are equipped with a feeding system with closed loops to prevent the dried raw materials from being damp again due to contact with outside air;
6. This series of dehumidification system adopts double cooler structure to ensure lower return air temperature and dew point;
7. The feeding system is equipped with a shutoff valve to ensure that there is no residual raw material in the material pipe;
8. The machine is equipped with microcomputer control as standard equipment, and PLC control and LCD touch man-machine interface can be purchased, the operation is centralized and convenient, and the whole machine can be controlled to run automatically;
9. Optional dew point meter to monitor the dew point at any time. 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,
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,
Dehumidifier dryerand other plastic resins must be dehumidified and dried during the production process to improve the quality of the finished product.
ABS polymer 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.
ABS polymer 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.
ABS polymer dryer Precautions
ABS-Dehumidifying dryer
9 reasons why the desiccant dryer cannot dry materials normally:
(1) The waste heat flue gas whose temperature is less than 350℃ can not be used as the heat source to dry materials;
(2) The phenomenon that the particle size of the material becomes larger during the drying process cannot be solved, which greatly affects the material effect.
(3) Common problems such as large heat loss, low thermal efficiency, high coal consumption, difficulty in controlling the moisture in the discharged material, and low relative output;
(4) Can not adapt to the drying of materials containing crystal water (such as the drying of dihydrate gypsum into hemihydrate gypsum), and cannot adapt to the drying of high moisture materials;
(5) The dryer system does not use an automatic microcomputer detection and control system, and can not accurately control the material, wind, coal, etc. in time, which causes the drying system to fail to function.
(6) The air filter in the dehumidifier dryer is blocked, which leads to poor ventilation. It is difficult for the indoor humid air to flow through the evaporator in large quantities, which affects the dehumidification effect of the dehumidifier. At this time, it is necessary to check and clean the air. Filter, wait until it is dry before reinstalling it.
(7) There are obstacles blocking the air outlet of the desiccant dryer, which affects the air flow, thereby reducing the dehumidification effect. At this time, it is necessary to remove the obstacles at the air outlet of the dehumidifier or move the position of the desiccant dryer to ensure the desiccant dryer Work in a good environment to achieve a drying effect.
(8) Insufficient refrigerant in the dehumidifier dryer will directly lead to insufficient cooling capacity and reduce the dehumidification effect. At this time, it is necessary to supplement the refrigerant to increase the cooling capacity of the dehumidifier.
(9) The humidity setting of the dehumidifier dryer, because most dehumidifiers are controlled automatically. If you find that the dehumidifier is not effective and often stops working, you can check the humidity setting. It may be the set humidity Too high, resulting in unsatisfactory dehumidification, just adjust the humidity value.
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