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plastic dryer

What are the specific functions of the three-in-one dehumidifying dryer

source：Plastic pellet dryer
Author：plastic dryer
time：2020年11月10日 09:45:17

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three-in-one dehumidifying dryer integrates three functions: dehumidification, drying and feeding. It is widely used in various plastics, especially engineering plastics with strong hygroscopicity.
The dehumidification, drying and feeding combination combines three functions of dehumidification, drying, and two-stage feeding into one machine, also known as "three machines in one". Especially suitable for engineering plastic materials with strong hygroscopicity, such as PA, PC, PBT, PET, etc. The dew point of the supporting dehumidifier can reach below -40℃
Features:
● Integrate three functions of dehumidification, drying, and two-stage feeding;
● Europeanization dehumidification, drying and feeding combinations are all equipped with honeycomb runners, which can obtain stable and low dew point dry air;
● The stainless steel heat-preserving drying barrel is designed with a lower blower pipe to dry the raw materials evenly and effectively prevent heat loss.
● The feeding system is equipped with a shutoff valve to ensure that there is no residual material in the material pipe;
● The closed loop feeding system can prevent the raw material from being polluted or re-moisture;
● PLC control with LCD touch man-machine interface can be purchased, the operation is centralized and convenient, and the whole machine can be controlled to run automatically.
● Optional dew point detection device.
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working principle: three-in-one dehumidifying dryer

Drying and dehumidifying 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 regeneration heating 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 then desorbed by the regeneration air to be discharged, forming a 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.
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Suction part: Suction is sucked into the dry bucket from the storage bucket or other storage container. When the micro switch of the vacuum hopper detects that there is no material, the suction motor runs to make the vacuum in the vacuum hopper and store it. The raw material in the hopper is sucked into the vacuum hopper due to the air pressure difference. When the suction time is completed, the suction motor stops running.
The raw material will fall into the drying barrel due to its own weight. The dried raw materials are pumped from the drying barrel to be installed in the plastic molding
Inside the machine’s electric eye hopper or other hoppers.
Why use a three-in-one dryer:
Bubbles, silver streaks, cracks, flow marks, poor transparency, etc. The main reason for these poor quality is that the plastic is not sufficiently dried before being molded. Engineering plastics such as PA, PC, PBT, PET, NYLON, etc. absorb moisture For the more flexible raw materials, the traditional dryer cannot completely dry it due to the penetration of water into the plastic pellets. Practice has proved that reducing the dew point of the drying wind to below -40℃ and controlling the heat to blow it over the surface of the moisture-containing plastic particles can reduce its moisture content to below 0.02% before molding. The dehumidification, drying and feeding combination is in a closed cycle. The air is fully dehumidified and heated in the system, and the dry air quickly completely separates the moisture in the plastic pellets to achieve the effect of dehumidification and drying.
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