Structural parameters When the dryer rotates, the internal materials are constantly flipped up and down, causing the materials to constantly update the surface in contact with the wall, fully utilizing the heat conducted by the wall. At the same time, the residual pressure of the dryer can reach 5333Pa-10000Pa, containing various solvents (including water) in the materials. Under vacuum conditions, it can rapidly vaporize at lower temperatures, achieving the goal of material drying. Dryer body: The inner liner of the dryer is made of SUS304 (stainless steel), the jacket is made of Q23 * (carbon steel), and the insulation shell is made of SUS304 (stainless steel). The inner and outer surfaces are all polished, which not only facilitates flushing and meets the sterile requirements of materials (or drugs), but also facilitates heat conduction and improves drying rate. Transmission part: The dryer is driven by a first stage belt drive, a second stage worm gear reducer (or continuously variable transmission), and a third stage chain drive to rotate at low speed (0-8 revolutions per minute) around the horizontal axis. The machine has buttons for on and off operation.
Rack: Made of welded steel and steel plates, the cylinder body is connected to the left and right shafts and supported on the rack by two double row radial spherical roller bearings.
Vacuum tube: used to extract solvent (or water) vapor evaporated in the cylinder, made of SUS304 material, with a filter installed at the inlet end. When used, it should be covered with industrial polyester flannel to prevent material from being carried out.
Working principle: When drying, the tank is in a vacuum state, and the jacket is heated by hot water (or steam, thermal oil). As the tank rotates at low speed, the material continuously moves up and down inside and outside the tank in a "diamond shaped trajectory" and absorbs and evaporates. The steam is continuously discharged through the vacuum pipeline to achieve the purpose of material drying. At the same time as drying the mixture, the built-in spraying, filtering, crushing and other devices according to customer requirements can achieve its multifunctional operation. 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. PET pellet dryer 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. PET pellet dryer 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.
PET pellet dryer Characteristics of double cone rotary vacuum dryer:
The container rotates, the heating surface of the material is constantly replaced, the drying speed is accelerated, and the product is dried evenly; Indirect heating to prevent material contamination; No dead corners, easy to operate and clean; The optimized sealing method has a good sealing effect and is particularly convenient for maintenance.
Vacuum dryer drying reduces the moisture in the product, and the air in the environment is relatively special, causing the moisture to evaporate. This is usually done by heating to reduce the humidity of the air, but drying in vacuum at low temperatures often occurs quickly. It is also possible to achieve a very high level of drying, which may be desirable in certain situations.
The basic working principle of a vacuum dryer is to use steam, hot water, or thermal oil as the heat source, generate heat through radiation, and the water evaporates quickly. Under normal pressure, water begins to boil at around 100 ℃, but under vacuum conditions, evaporation is prone to high partial pressure, with a boiling point of 100 ℃. For example, when water begins to boil, it is only 70 ℃ and the surface pressure is 0.07m. This series of dryers has higher efficiency and can be used to dry materials such as pharmaceuticals, chemicals, food, heavy and light industrial products, and thermosensitive materials even under low temperature conditions.
One of the advantages of vacuum drying is its energy efficiency. Not requiring too much energy for drying, reducing the storage of dried products, related economic and environmental costs for sales, or other purposes. This process is often faster than other drying methods, reducing processing time, which is an important facility for products to be moved through quickly.
Another advantage of such dry materials is that the drying process is less destructive. Some materials can handle problems at high temperatures, such as leather skin being exposed to heat during the drying process. Vacuum drying often preserves the integrity of the original project without damaging its heat. For food, this may be valuable, while other drying processes can reduce quality and make food less attractive.
The advantage of vacuum drying is that using a vacuum dryer can reduce worker risks. Compared to other types of dryers, it has ventilated gases and particles that force people to wear protective clothing. Using vacuum drying, ventilation does not occur, and workers work safer. It is also possible to recover and dry the precipitated water for further use or collection during research.
PET pellet dryerWith 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. plastic dryer,
Dehumidifying dryer,
Resin dryer,
plastic Dehumidifying dryer
PET 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.
PET 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.
Material requirements for double cone rotary vacuum dryer:
A. Drug materials that come into direct contact with material components should be corrosion-resistant, non absorbent, and not react with drugs, and the documentation of the materials should be provided. B. Stainless steel plates should comply with the provisions of GB/T4237. 2. Requirements for structure and appearance: A. The inner surface and working part of the device should be flat, smooth, without dead corners, and easy to disinfect and clean when in direct contact with the material. B. Lubricating seals and transmission components should have no leakage. C. The driving components and outer surface of the box of the SZG series double cone rotary vacuum dryer should be coated with stainless steel. Afterwards, the coating surface should be smooth, even, and free from obvious visual defects and other violations. 3. Performance requirements: A. The operation system of the SZG series double cone rotary vacuum dryer should be sensitive and reliable; The mechanical transmission should have no blockage or abnormal noise, and the tank should rotate smoothly; The vacuum straw is coaxial with the main body, and there is improper shaking phenomenon.
B. The operating noise level should not exceed 85 decibels.
4. Safety requirements:
A. The insulation resistance of the electrical system should comply with 19.4 and GB5226.1-2002. B. The voltage electrical system should comply with the provisions of 19.3 in GB5226.1-2002. C. The electrical system, warning signs, and project codes should comply with the provisions of GB5226.1-2002 in Chapter 7. D. The relevant regulations of GB150-1998 implemented by the Design, Manufacturing, Testing Equipment and Containers Department are the Safety Technical Supervision Regulations for Pressure Vessels. The mechanical transmission components should have sufficient strength and gear rigidity, and necessary protective measures should be taken to ensure the safety of operators.
PET pellet dryer operation process guide:
1. PET pellet dryer Purpose
Properly operate and maintain the Dehumidifying dryer and standardize the operation of the PET pellet dryer to ensure the baking quality of raw materials, increase the service life of the machine, and protect the safety of operators.
2. PET pellet dryer Scope It is applicable to the operation of all desiccant dryers in our factory.
3. Definition None
4. Operational Responsibilities The feeder in the injection molding department uses the dehumidifier and dryer correctly in accordance with this operating instruction to protect the dehumidifier from damage and normal operation, and ensure that the machine is clean and tidy.
5. PET pellet dryer Content
5. 1 Put all the current disconnect switches in the control box to the "ON" position, press the RUN/STOP key on the control panel, the indicator light will light up to start operation, and press RUN/STOP again during operation. ] Key, the indicator light flashes slowly, cooling operation, it will shut down after 5 minutes of operation.
5. 2 Setting of drying temperature: Press the mode switch【MOKE CHANGE】key twice, at this time the drying temperature setting display shows the symbol of C unit, press
5. 3 One-time conveying operation: press the LOADRI RUN/STOP] key of conveying 1 and the material is sent from the storage bin to the drying barrel. At this time, the indicator light flashes quickly, and when conveying 1 is pressed again, the operation will start. /Stop【LOADRI RUN/STOP】key,PET pellet dryer the indicator light flashes slowly until it stops, when the indicator light does not flash, it means that the bucket is full.
5. 4 Secondary conveying material operation: press the LOADRI RUN/STOP button of conveying 2 to send the material from the drying barrel to the machine storage hopper. At this time, the indicator light flashes quickly PET pellet dryer. When conveying 2 is pressed again Run/stop] LOADRI RUN/STOP] key, the indicator light flashes slowly until it stops, when the indicator light does not flash, it means that the bucket is full.
5. 5 The three-time conveying operation is the same as the second-time feeding operation mode, but the key is the conveying 3 run/stop]LOADRI step RUN/STOP] key.
5. 6 When Dehumidifying dryer is automatically operated to transport materials from the storage box to the drying cylinder and from the drying cylinder to the hopper of the forming machine, the conveying must be opened first
5. 8 Maintenance and maintenance of desiccant dryer:
5.8.1 PET pellet dryer delivery 1-3 Filters and dryer filters must be cleaned once every shift.
5.8.2 When the machine is maintained and repaired, all current switches in the control box must be set to the "OFF" position.
5.8.3 The material in the PET pellet dryer can only be used by the random molding machine (except for special circumstances).
5.8.4 When conveying 2 (transporting 3) is in operation, pay attention to opening the drying cylinder unloading valve about half to prevent the remaining material in the conveying pipe from blocking the conveying pipe and affecting feeding when the conveying 2 (conveying 3) stops.
5.8.5 The machine will generate high temperature during operation. Please take care to prevent burns. Do not touch the operation panel with wet hands, otherwise electric shock may occur. Note: The PET material of Hexing Parts must be produced with this machine, and other materials must be produced with a dehumidifying dryer according to the physical property table.
6. Reference file "Dehumidifying dryer operation manual"
7. Relevant records Dehumidifying dryer drying material record sheet Dehumidifying dryer maintenance check sheet
Practice has proved that reducing the dew point of the drying wind to below -40°C while controlling the du heat to blow over the surface of the wet plastic particles can reduce the moisture content of it to below 0.02% before molding. The PET pellet dryer is used The air is fully dehumidified and heated in a closed circulation system, and the dry air quickly completely separates the moisture in the plastic particles to achieve the effect of dehumidification and drying.
So, do users know when they cannot use the machine?
Under what circumstances cannot be used PET pellet dryer:
1. PET pellet dryer,dehumidifier dryer There is a damaged line;
2. PET pellet dryer To prevent electric shock, do not run the machine on a wet floor or after the machine is exposed to rain;
3.PET pellet dryer If the machine is damaged or disassembled, it should not be overhauled and installed by professional maintenance personnel;
4. During the operation of the machine, at least 1m of surrounding space is required. Please protect this device and flammable materials at least 3m away;
5.PET pellet dryer Avoid vibration and magnetic influence in the work area.
6.PET pellet dryer When the ambient temperature is lower than 15℃, the water droplets attached to the surface of the evaporator will freeze to weaken the effect of the dehumidifier. If the ambient temperature exceeds 40℃, the pressure in the system will increase and the compressor will be overloaded. The protector should cut off the circuit, otherwise the compressor motor will be damaged. So the best temperature range of dehumidifier is 15℃～40℃. If the humidity in the air is below 30%, it will be too dry and uncomfortable, so a reliable humidity controller will control it to maintain the range of 50% to 60%. When using, close the doors and windows as much as possible, so that the indoor dehumidification effect is good.
The body of the desiccant dryer must be placed flat, not tilted or turned sideways, to avoid machine failure or abnormal noise.
7. The water storage in the Dehumidifying dryer is too full. In order to avoid overflowing and contaminating the ground, when the machine body must be moved during operation, please unplug the power cord first, and then pour out the water in the water storage bucket. Clean the air filter regularly (about once every two weeks) to maintain the dehumidification and dust removal efficiency and life of the machine. Clean the air filter and wash it with water below 40℃; it is better to clean it with detergent. After washing off the dust, rinse it with water, dry it and put it back into the body.
8.PET pellet dryer When cleaning the body, wipe it lightly with a damp cloth; avoid directly splashing water for cleaning, so as not to damage the electrical insulation. Adhesives on the surface of the body can be cleaned with soap and water. Avoid spraying with gasoline, petroleum spirit, solvents or spray insecticides to avoid peeling paint or discoloration. Do not use thin rods or iron wires to dig out the inside of the machine to avoid malfunction or danger. Please unplug the power cord to maintain the life of the machine when it is out of power, not used for a long time, or when traveling!
Precautions when using PET pellet dryer:
First, please carry out electrical construction in accordance with the "Electrical Equipment Standards", "Inside Wiring Regulations" and this operating manual.
Second, please do not use power sources other than those specified. plastic dryer,
Dehumidifying dryer,
resin dryer,
plastic Dehumidifying dryer
Third, please complete the specified grounding works. (Yellow power cord)
Fourth, please fasten the connectors and connection terminals of the machine body and measuring instrument wires.
Fifth, the power supply must be cut off before the line inspection, and the voltage must be measured with a multimeter after 10 minutes to ensure safety before proceeding with the inspection.
Sixth, do not open the control box door at will during the power-on process.
Seventh, do not touch the machine body, control unit, and other accessories with wet hands.
Eighth, please do not damage the wires, do not put pressure on the wires, do not place heavy objects on the wires, and do not clamp the wires. It may cause electric shock.
Ninth, please professional and technical personnel for wiring and inspection.
Tenth, when you need to disassemble the machine for inspection and cleaning, please cut off the power and compressed air source first.
This is the manufacturer of PET pellet dryer pellet dryer http://global.wto-btb.com Information provided
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+8613669807274
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Tel: +8613669807274
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