Working principle of waste plastic granulator

The main cylinder of the single-screw waste plastic granulator adopts electric heating, and the water cooling automatically controls the barrel temperature. The screw core can be cooled by water (oil) to control the screw temperature. The machine head is equipped with a pressure sensor that tests the melt temperature and melts pressure. The hob granulator, the granulation auxiliary machine, and the rotary blade are driven by the AC speed regulating motor, the frequency conversion speed regulation, the centrifugal dewatering machine, the bedroom vibrating screen, the air supply storage barrel and the like.

     Carbon powder, magnetic powder granulation, cable insulation materials, sheath materials, low-smoke halogen-free flame-retardant PVC cable materials and preparation of various silane cross-linking materials, etc., small models are mainly used for scientific research and teaching.

    The difference between the working principle of waste plastic granulator: single screw granulator: the pulverized material or the film material passes through the feeding port, and under the action of the rotating screw, it is twisted into a lump and rolls along the screw groove, due to the shearing of the screw, compression, and agitation, the material is further mixed and plasticized, the temperature and pressure are gradually increased, showing a viscous flow state, passing through the machine head with a certain pressure and temperature, and then being drawn through the die to obtain the desired shape. Products.

    Twin-screw granulator: the production process material is sent to the double-cone feeder through the automatic hoist, the cone double will force the material to be evenly added to the main screw, and the material is compressed and sheared and externally heated by the screw. Under the action, the material is mixed and plasticized.

    Scope of waste plastic granulator: Twin-screw granulator is mainly used for filling, blending, modification, addition, chlorination, polypropylene and superabsorbent resin processing of rubber and engineering resins; degradable masterbatch, Polyamide polycondensation, extrusion of polyurethane polyaddition reaction; granulation of carbon powder, magnetic powder, insulating material for cable, sheath material, low-smoke halogen-free flame-retardant PVC cable material, preparation of various silane cross-linking materials, etc. Small models are mainly used for research and teaching.

How to specifically clean the plastic granulator metho

Plastic granulators are widely used in the processing of various raw materials. Another insulating plastic pellet machine capable of handling many types of intensively mixed thermoplastic materials, accepting larger impurities 30% to 40%, plastic trash cans not softening or melting polymer materials, it can contain other non-polymerization Things such as paper, glass, metal, dirt, and more.

Plastic granulators are made up of more than 60% of the material consisting of polyolefins, which are involved in contaminants (impurities) during softening or melting treatment. The material currently uses various types of waste plastics. The extruder of plastic particles can produce a cross-section of a variable cross-section with a constant cross-section and the size is 15.2cmX15.2cm.

The mixed mold is molded in plastic and the plastic pellets can be treated with a mixture of 50% to 70% thermoplastic. The plastic granulator mixes the friction (low melting point) partially melted and automatically adjusts the scraper to remove the molten material from the plastic machine. The pellet extruder dies into a predetermined amount, a roll-shaped container, and then sends a news device, optionally having a series of compression dies.

Before use, it is possible to pulverize the waste during the molding of the plastic ball. Plastic granulators are machines that process plastics. Heat treatment is generally required, which causes the machine to be prone to congestion. At this time we need to clean the plastic granulator. The following is a detailed explanation of the specific cleaning methods for plastic granulators.

The plastic granulator is vacuumed. Repeat several times. Until the cavity contains vinyl chloride; the air duct of the blower is placed in the cavity for ventilation. Close the relevant valves on the plastic granulator (monomer feed valve, nitrogen valve, single gas recovery valve, non-ion water feed valve, disconnect the air supply of the automatic opening and closing valve of the feed port. Cut off the power of the plastic granulator. In the whole process of cleaning operations, we should carefully monitor and timely transfer the tools and ensure the safety of the personnel in the kettle. If abnormal conditions are found, we should promptly assist in handling or contacting.

Plastic extruder control system

The control system of the plastic extruder includes a heating system, a cooling system, and a process parameter measuring system, and is mainly composed of an electric appliance, a meter and an actuator (ie, a control panel and a console). Its main function is: control and adjust the drag motor of the main and auxiliary machines, output the speed and power according to the process requirements, and enable the main and auxiliary machines to coordinate work; detect and adjust the temperature, pressure and flow of the plastic in the extruder; Control or automatic control of the entire unit.

The electrical control of the extrusion unit is roughly divided into two parts: transmission control and temperature control, which realizes the control of the extrusion process including temperature, pressure, screw revolution, screw cooling, barrel cooling, product cooling, and outer diameter, and traction speed. , neatly arranging the line and ensuring constant tension take-up control from the empty plate to the full plate on the take-up reel.

1. Temperature control of the extruder main unit

The plastic extrusion of the wire and cable insulation and the sheath is based on the deformation characteristics of the thermoplastic, making it in a viscous flow state. In addition to the external heating of the screw and the barrel, it is transferred to the plastic to melt and extrude. It also considers the heat generated by the screw when extruding the plastic. Therefore, the temperature of the main unit should be considered from the whole, considering the heating and opening of the heater. Close, it is necessary to consider the factors of the extrusion head of the screw to cool, and to have effective cooling facilities. It is required to correctly and reasonably determine the position and installation method of the thermocouple of the measuring component, and accurately reflect the actual temperature of each segment of the host from the reading of the temperature control meter. And the accuracy of the temperature control instrument is required to cooperate with the system so that the fluctuation stability of the whole host temperature control system reaches the extrusion temperature requirements of various plastics.

2. Pressure control of the extruder

In order to reflect the extrusion of the machine head, it is necessary to check the head pressure during extrusion. Since the domestic extruder does not have a head pressure sensor, it is generally used to measure the thrust of the screw after extrusion, instead of the head pressure measurement, the screw load table (Electrometer or voltmeter) correctly reflects the extrusion pressure. The fluctuation of extrusion pressure is also one of the important factors causing the instability of extrusion quality. The fluctuation of extrusion pressure is closely related to the extrusion temperature, the use of the cooling device, and the length of continuous operation time. When an abnormal phenomenon occurs, the rapid elimination that can be eliminated, the reorganization of production must be decisively stopped, not only can avoid the increase of waste, but also prevent accidents. By detecting the pressure gauge reading, it is possible to know the pressure state of the plastic during extrusion, and generally, take the back pressure limit value alarm control.

3. Control of screw speed

The adjustment and stability of the screw speed is one of the important process requirements of the main drive. The screw speed directly determines the amount of glue and the extrusion speed. The normal production always wants to achieve the highest speed and achieve high output. When the extruder requires the screw speed from starting to the required working speed, the available speed range is large. . Moreover, the stability of the rotational speed is required to be high, because the fluctuation of the rotational speed will cause the fluctuation of the extrusion amount and affect the extrusion quality so that the change of the outer diameter of the cable will occur if the traction linear velocity does not change. Similarly, if the linear velocity of the traction device fluctuates greatly, the outer diameter of the cable will change. The speed of the screw and the traction wire can be reflected by the corresponding instrument on the console. The extrusion should be closely observed to ensure high quality and high yield.

4. Control of the outer diameter

As mentioned above, in order to ensure the size of the outer diameter of the product cable, in addition to the dimensional tolerance of the control core (core), the extrusion temperature, the screw speed, the linear speed of the traction device, etc. should be controlled, and the outer diameter The measurement control comprehensively reflects the accuracy and level of the above control. In the extrusion unit equipment, especially the high-speed extrusion production line, the online outer diameter detector should be used to detect the outer diameter of the cable at any time, and the over-range signal is fed back to adjust the speed of the traction or screw to correct the outer diameter. Very bad.

5. Tension control required for winding

In order to ensure the wire take-up at different line speeds, the constant tension requirement from the empty plate to the full plate operation, it is desirable to have the wire tension adjusting mechanism for the wire receiving device or to electrically consider the winding of the constant linear speed system and the constant tension system. and many more.

6. Electrical automation control of the whole machine

This is the process control requirement for high-speed extrusion production line, mainly: start-up temperature interlocking; working pressure protection and interlocking; proportional synchronous control of extrusion and traction two major components; synchronous control of take-up and traction; On-line detection and feedback control of the outer diameter; control of the single machine and the whole machine tracking of the components according to various needs.

Things to be aware of when operating plastic extruders

For many people who have not known plastic extruders, the operation of plastic extruders is very mysterious, and there are many people who already have, or who are using plastic extruders, the correct operating specifications for plastic extruders. I understand, today I will talk about the precautions in the use of plastic pelletizing extruders.
Operators should pay attention to the use of plastic extruders:

1. The plastic extruder operator should memorize the operation requirements and operation sequence in the manual of the plastic extruder.

2. Before driving, check whether the screws and nuts of each connection part of the equipment are firm; whether the lubrication parts are filled with sufficient lubricating oil; whether the amount of lubricating oil in the fuel tank is within the specified oil level indicator.

3. Check that the hopper is clean and free of any foreign matter.

4. Check whether the raw materials meet the quality requirements; if the quality of the raw materials is qualified, feed the hopper and fill it up.

5. Verify that the structure of the screw meets the production process requirements.

6. After confirming that the barrel is clean and free of any foreign matter, install the filter, manifold, and molding die.

7. According to the requirements of raw material plasticizing process conditions, adjust the temperature of the automatic control instrument on the control box.

8. The heating system is started, and the barrel and mold are heated to heat up. When the temperature required by the process is reached, the heating is constant for more than 1.5 hours to ensure uniform temperature at each part.

9. The manual V-belt part of the car should be flexible, easy and without blockage.

10. Start the lubricating oil pump, check whether the lubricating oil pipeline is unobstructed and whether the lubricating oil supply position is accurate.

11. After the lubricating oil is supplied for 3 minutes, adjust the main motor speed knob to zero position; the low-speed start screw rotates the main motor. At the same time, observe the swing of the main motor ammeter pointer, which should be within the specified load range. Note: The shorter the screw running time, the better, the maximum should not exceed 3min to avoid scratching the screw and barrel.

12. Open the hopper feed gate and feed less and evenly and slowly.

13. Start the cooling unit. Open the cooling water supply system. Start the traction device.

14. Check the plasticizing quality of the melt extruded from the die mouth (if necessary, adjust the process temperature), and install the sizing sleeve when the melt is completely plasticized. If the tube blank extruded from the die mouth is skewed, the gap between the die and the mandrel should be adjusted immediately. When adjusting, first loosen the adjusting screw on the thin side of the tube blank (the bending side of the tube blank), and then tighten the adjusting screw on the thick side of the blank wall until the tube blank runs straight out. Note: When adjusting the gap between the die and the mandrel or observing the quality of the melt plasticization, the operator should not face the die mouth to prevent the melt from decomposing and scalding the operator.

15. After the tube blank extrusion adjustment is normal, the tube blank introduces a sizing sleeve, a human water tank, and a traction machine, and the traction speed is appropriately adjusted to match the extrusion speed of the tube blank from the die mouth.

16. Cut the tube product and take a sample. Check the quality and size of the pipe products in accordance with the quality requirements of the production regulations.

17. After checking the quality of the pipe products, there is no abnormality in the working sound of the equipment, and the current load is normal, which can increase the working speed of the screw to the normal production speed.

After the extrusion production is transferred to normal work, the operator should always pay attention to observe the following work conditions:

·Whether the load current of the drive motor for screw rotation is normal and is within the rated value range;

· Whether the sound of each moving work part is abnormal;

·Whether the temperature rise of each bearing part is normal, the highest temperature rise should not exceed 55 °C;

• Whether there is leakage in the lubricating oil or cooling water pipeline, and whether the working flow pressure is within the specified value.

18. When there is a sudden power outage or abnormal accident during work, stop the emergency (press the emergency stop button) and turn each speed adjustment knob to zero.

If the parking time is long, the raw materials in the barrel are polyolefin-based materials (polyethylene, polypropylene, etc.), which do not need to be removed. If it is a PVC material, it must be removed in time: use a special tool to remove the screw and clean the residual material on the barrel, screw and forming mold.

Note: When cleaning the residual material, use a copper knife, brush or bamboo tool to scrape the material. It is not allowed to use steel knives and boring tools to clean the residual material. It is not allowed to use the fire barbecue screw to remove material. After cleaning, apply anti-rust oil and assemble it on the equipment.
When troubleshooting or restoring power, first heat up the barrel and mold. When the temperature of the process is reached, the temperature is 1.5h or more. It is easy and flexible to use the manual disk to turn the V-belt. At this time, the main motor can be started at a low speed and work in the normal driving sequence.

19. The sequence of normal stop production operations is as follows.

• Close the supply gate.

· Minimize screw operating speed.

• The screw works until the mold stops without the melt.

· If the extruded material is a polyolefin resin, stop at this time, turn off the heating and cooling system, and wait for the next production; if the barrel is made of polyvinyl chloride resin, immediately remove the mold, screw, and remove all parts. Residual material; after the screw is not cleaned, Xu anti-rust oil, wrapped in a dry and ventilated place. Note: When disassembling the mold and the screw, it is not allowed to directly hit the parts with the heavy hammer. If necessary, the hardwood should be placed on the hit part to avoid damage to the parts.

• Turn off heating, wind, water, and various lubrication systems.

• Cut off the main power supply.

The correct operation method for the production of plastic extruder

The first production sequence of the plastic extruder is as follows:

    1. Clean up the environmental sanitation of all equipment on the plastic extruder production line.

    2. Clean the equipment and clean the equipment.

    3. Check the quality of the lubricating oil in the oil tank of the cabinet and carry out proper treatment (filter or replace according to the quality of the lubricating oil, and increase the amount of lubricating oil).

    4. Clean all lubrication parts and oil pipelines, except for dirt in the oil cup.

    5, inventory, cleaning plastic extruder production tools, placed neatly.

    6. Check whether the oil seal in the inlet and outlet of the barrel is intact; remove the dirt in the hopper and do a good job of sanitation.

    7. Check for looseness of each fastening screw and tighten as appropriate.

    8. Clear the dust inside the control box and the instrument box; check whether the connection of each line is tight; send power test, test

    The insulation resistance of the motor, electric heating device and electronic control parts shall comply with the relevant regulations.

    9. Test whether the bearing, gas, and oil pipelines are unobstructed and check for leaks.

    10, pull the V pulley, the screw should be easy to rotate, no block phenomenon.

    11. Remove the oil stain on the molding die and check that the parts of the mold should be clean and free of rust. Then assembled in

    On the barrel (if you need to add a filter and a manifold, you should first install these two parts in the barrel and then install the mold)

    12. After the mold is installed, the gap between the die and the mandrel should be properly adjusted to achieve uniformity.

    13. Check the quality of the raw materials used for production (Verify whether the grade of the material matches the process requirements, whether the pellets are uniform

    Uniform, whether the material is wet, whether there are impurities, etc.).

    14, the empty running point car trial turn. Start the lubricating oil pump, and then rotate the screw at low speed after 3 minutes of operation.

  Check for abnormalities and turn off the lube pump after everything is normal.

    15. The machine and the mold are heated to heat up. After the process temperature is reached, the heating temperature is not less than

  Ih.

    16. Use a mercury thermometer to detect the temperature of the barrel and the molding die, and correct the temperature of the meter on the control box.

  It is consistent with the temperature of the mercury thermometer.

    17. Check the test feeding device and fill the hopper with raw materials.

    18. Pull the V-belt to rotate again, it should be easy and flexible, without blockage.

    19. Start the lubricating oil pump, work 3..., check if the spray lubricating oil is in place.

   20, low-speed start drive screw rotating motor, observe the voltmeter, ammeter pointer swing is normal,

  After everything is normal, start feeding.

    21, feeding to the barrel, the initial feeding is less and uniform, observe the current meter pointer swing at any time

  In case, it should be within the allowable rating (allowing an instantaneous overload).

    22. When the mold mouth is discharged, the uncompleted plasticized material and the dirt are first removed, and the plasticizing quality of the raw materials is checked.

  Appropriately adjust the process temperature of the barrel and the forming mold as appropriate, and adjust the mouth according to the operating condition of the extruded tube blank

  The gap between the mold and the mandrel until the tube runs straight.

    23, the plastic extruder production line of the auxiliary machine driving (referring to the tractor and cutting machine).

    24, stop the screw rotation, install the sizing sleeve, air block, turn on the compressed air (used when the internal pressure is legal)

  Or turn on the vacuum pump line (used when vacuum sizing).

    25. The low speed start drive screw rotating motor, and the extruded tube blank is introduced into the cooling and cooling water tank.

    26. After the extruded tube blank is cooled and shaped by the water tank, the tube sample is taken and the forming quality of the tube material is measured.

    27. According to the pipe test results, adjust the process temperature, air pressure and vacuum of the barrel and molding die.

  degree. Process conditions such as cooling water and traction speed that affect the quality of pipe forming, so that product quality can be molded

  begging.

    28, after the pipe quality meets the requirements, the working speed of the screw should be gradually increased until the normal operation begins.

  Trumpet products.

    29. After the pipe production and extrusion work enter normal operation, the operator should always inspect and check the temperature of each part of the bearing.

  The degree should not exceed 45 ° C; check the current change of each power supply equipment; whether the sound of each transmission part is normal;

  Whether the pipe operation is stable; whether there is leakage in each of the air supply and water supply pipes.

Prospects for the development of recycled plastic pellets

Recycled plastic granules refer to plastic materials obtained by processing waste plastics by physical or chemical methods such as pretreatment, melt granulation, modification, etc., and then reheating plasticizing and dicing to utilize them. Reuse of plastic. Due to its wide application space and huge cost advantages, it has always been favored by the market.

Recycled plastic pellets have a wide range of applications. In daily life, recycled granules can be used to make various plastic bags, barrels, pots, toys, furniture, stationery and other household appliances and various plastic products. In the garment industry, it can be used to make garments, ties, buttons, and zippers. In terms of building materials, plastic-wood profiles derived from recycled plastic pellets manufacture various building components, plastic doors and windows, and the like. In the chemical industry, it can be used to make reactors, pipes, vessels, pumps, valves, etc., used in chemical production sites that address corrosion and wear. In agriculture, it can be used to make the agricultural film, pumping pipes, agricultural machinery, fertilizer packaging bags, and cement bags. In addition, recycled particles are also widely used in the electrical industry and the telecommunications industry.

Plastic pelletizing machine opening factory notice:

1. Plastic pelletizing machine plant requirements: Take a production line as an example. The workshop is about 30 square meters. It requires water and electricity (must be power), and the material yard is about 30 square meters (waste plastic cleaning and sorting site). If there are multiple production lines at the same time, cleaning and crushing workshops, granulation workshops and finished product warehouses should be set up to facilitate daily management and improve production efficiency.

2, plastic pelletizing machine workers: a production line only 2-4 workers (two shifts). If the scale is produced, the number of workers should be increased appropriately. Workers should have a junior high school or higher education level. It is recommended that investors give priority to hiring laid-off workers because they all have certain skills and organizational disciplines, and they are quick to go and easy to manage.

3, plastic pelletizing machine construction cycle: only 5-7 days.

Precautions before using plastic crusher

1. Before the plastic crusher is started, the drive wheel should be manually moved one or two times to confirm that the movement is flexible and can be started. Wait until the crusher is running normally.

  2. Before stopping the operation, stop the feeding and drain the material in the machine before cutting off the motor power.

  3. In the operation of the plastic crusher, we must pay attention to the temperature of the bearing, so that the bearing maintains a good lubrication state, and pay attention to whether the sound and vibration are abnormal. When an abnormal condition is found, stop it and check if it is caught by an object that is not easily broken or if the machine is damaged.

  4. Keep the feeding of the crusher even and prevent overload. Prevent unbreakable objects such as metal and wood from falling into the machine. When it cannot be broken, the moisture content of the feed should not be too high; when it is broken by the wet method, it is necessary to maintain an appropriate amount of water to prevent clogging due to insufficient flushing and reduce the production capacity.

  5. Check if the particle size of the broken product meets the requirements. If there are too many particles exceeding the specified size, the cause should be found (such as excessive gap of the screen, too wide discharge opening, hammer wear, etc.) and appropriate measures should be taken to eliminate it.

  6. When the crusher stops, check whether the fastening bolts are firm and how worn the wearable parts are. For the tooth crusher, the parking opportunity should also be used to remove the wood sandwiched between the teeth.

  7. Parts that are worn out should be replaced or repaired in time.

  8. The safety device of the crusher should be kept in good condition and must not be saved, and the safety device should be invalidated.

https://www.recycle-plant.com/waste-plastic-pet-bottles-crusher.html

How to choose the waste gas filter for plastic granulator

Exhaust gas and flue gas treatment require different processors. When we buy a plastic gas granulator, what should we pay attention to when we use a special kind of waste gas filter? Here are the points we will use to analyze and serve you. What should you pay attention to when using the Waste Gas filter for the production of recycled pellet granulators?

  First of all, depending on the type, the waste gas filter can be divided into three types: large, medium and small. Different models have different flue gas treatments. We should choose according to the size of our granulator, otherwise, it is difficult. Achieve the desired results. It should be noted that the flue gas processor is not omnipotent, although we can handle 100% accuracy, the accuracy may not be.

  When purchasing the Waste gas filter, you need to check the relevant regulations. If the manufacturer you are working with does not have the relevant qualifications, if you purchase it in time, it will not meet the standard. You should first check the corresponding qualifications. With the continuous reuse of social resources, the reuse of plastics is also highly valued, and the subsequent use and production of plastic granulators have become an indispensable part of modern society.

  Because of his promotion and use, it has largely solved the embarrassing situation that more plastics can be reused so that more plastic social resources can be reused again. Then, after cleaning the unclean plastic, will the screw enter the screw with the actual granulation effect?

  In fact, this does not have to worry, the water and the washed waste plastic together with the screw into the plastic granulator will not affect. The granulator produced by our factory is very unique in the design of the screw. It can be mixed in time without affecting the effect of granulation of plastic particles.

Plastic pellet machine features

Through the plastic pellet machine, all the recycled materials can be produced by sorting, crushing and cleaning without drying, and can be used both wet and dry. Moreover, it is automated from raw material crushing, washing, feeding and pelletizing. The split automatic power distribution system is adapted to ensure the safe and normal operation of the motor.

    The plastic pellet machine has the characteristics of the economy, environmental protection, safety, and aspect. In the past ten years, it has started to develop at a high speed under the rapid economic development of the world. It faces serious energy and environmental challenges and explores the new development path of the plastic granulator. It is imperative.

More about plastic pellet machine

    From its inception to the present, it has saved a lot of resources for society and brought real benefits to thousands of investors. Since the accumulation of waste plastics will take up a lot of space, before the advent of plastic pellet machines, many people choose to burn waste plastics on the spot, which in turn will pollute the atmosphere.

    For users who want to enter the plastic recycling industry, how to choose a professional plastic recycling granulator is crucial. It may be that everyone will think that all plastics can be done with the same machine. Even some factories that make earth equipment claim that one machine can do all the plastic.

    In fact, due to the wide variety of plastics, it is necessary to use different granulators for recycling and granulating different plastics. Only in this way, it is possible to produce plastic granules suitable for reproduction.

More about plastic pellet machine

Plastic granulator removal method

How to disassemble the plastic granulator? In order to avoid unnecessary troubles, Shuliy Machinery provides the following seven points. The main points of the granulator disassembly need to be remembered by the user of the plastic granulator. Everyone should understand the construction principle of the dismantled machine or component and avoid the demolition machine. Pieces.

Plastic granulator blog post

1. The surface soil and oil should be removed before disassembly and should be kept clean during the disassembly process.

2. When disassembling the granulator, use the appropriate tool without slamming it to avoid damage or deformation of the parts.

3. Disassemble as needed, disassemble as little as possible, and do not disassemble.

4. When disassembling the granulator, it is necessary to prepare for the assembly. In order to improve the assembly efficiency and ensure the correctness of the assembly, it is necessary to check and remember the marks when disassembling.

5, the plastic granulator should be dismantled in a reasonable order, usually from the attachment to the main part, from the outside to the inside, the whole machine is first disassembled into the assembly, and then the assembly is disassembled into parts, and the parts are disassembled into parts.

6. After the parts are collected, they should be stored according to the nature of the materials and the precision of the parts.

Plastic granulator blog post

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https://www.recycle-plant.com/plastic-granulator-machine.html

Plastic pellet machine for recycling waste resources

Plastic pelletizers are available in different types depending on the type of plastic. There are also different types depending on the degree of clean contamination. Different pelletizers are also available depending on whether they need to be cleaned. Then, for the current manufacturers, it is more urgent for pure, clean, non-polluting and non-contaminated plastic granulators.

  Of course, if you enter too much water, it will enter the granules together with the granules to a large extent. For reuse, you need to add more defoamers to solve. At the same time, we have reconsidered the need to remove excess water inside the screw, taking into account the problems and failures in this area.

  In which parts of the plastic granulator do you need to use the flue gas processor? Knowing this problem can handle all the generated flue gas and exhaust gas well, and it has reached the requirements of our environmentally friendly air department without causing pressure problems of air pollution.

  The plastic pellet machine is produced with the rebirth and reuse of resources. Without his existence, the discarded plastic bags and woven bags in the society cannot be recycled, and the purpose of better integration of resources cannot be obtained. Another aspect is a waste of resources. It is even more important to fully grasp the link between the granulator and the flue gas treatment. The melting stage of the waste plastic must be used. In this place, high temperature is required, and a gate of the flue gas processor must be used.

  The screw of the twin-screw granulator must be used when it comes out of the particle strip. Here, due to the long route, the amount of smoke is also large, and the vent of the flue gas processor is also responsive. After the pelletizing step, this place is the cooling part of the plastic pellet machine, the flue gas exists for a long time, and the end of the flue gas processor.

plastic pellet machine methods

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Plastic screw extruder work

The screw extruder is one of the most important equipment for plastic molding. It performs solid conveying, compaction, melting, shearing and kneading extrusion of plastic by external power transmission and heat transfer from external heating elements.

Since the birth of the screw extruder, after nearly a hundred years of development, it has developed from a common screw extruder to a new screw extruder. Despite the wide variety of new screw extruders, the plastic extrusion mechanism is basically the same.

The extrusion process of the traditional screw plastic extruder is realized by external heating of the barrel, solid material, and barrel, screw friction and melt shear force. “Coefficient of friction” and “friction”, “viscosity” and “shear stress” are the main factors affecting the performance of traditional screw extruders. Because the factors affecting “friction” and “viscosity” are very complicated, traditional screw extrusion The extrusion process is an unsteady state that is difficult to control and is particularly prominent for some heat-sensitive plastics with poor thermal stability and high viscosity.

Since the 1960s, scholars from all over the world have done a lot of research on the mechanism of screw extrusion, and have made remarkable achievements, but because their research is mostly limited to the traditional plastic extrusion mechanism, mechanical structure, and energy conversion, Has not been able to achieve a major breakthrough. A series of shortcomings such as large volume, high energy consumption, high noise, and difficult product quality has not been fundamentally solved in the conventional screw extruder.

Please pay attention to our website for more details:
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Failure and maintenance of plastic granulator

First, the host current is unstable, resulting in uneven feeding, main motor bearing damage or poor lubrication, no heating. If a certain heater fails or the phase is wrong, the screw adjustment pad is wrong and the components interfere.

Troubleshoot, check the feeder and replace the bearings if necessary. Repair the main motor and replace the heater if necessary. Check if the heaters are working properly, pull out the screw to check the screw for interference, and check the adjustment pad.

Second, the main motor cannot be started: the driving sequence is wrong, should check whether the fuse is burned; the main motor thread has a problem; the interlocking device related to the main motor works.

Re-drive in the correct driving sequence, check the sequence, check the main motor circuit, and check the status of the interlocks associated with the main motor. The oil pump does not turn on and check if the lubricant pump is activated. The motor can't be turned on. After turning off the main power supply and waiting for 5 minutes, the inverter will not start again. Check whether the emergency button is reset.

Third, the machine head is not smooth or blocked: the material is not plasticized, the heater does not work or the plastic has a wide molecular weight distribution. The operating temperature setting is low and unstable. There may be a foreign matter that does not melt easily.

Replace if necessary, check the heater and consult with the craftsman if necessary. Verify the set temperature of each section; increase the temperature setting; clean and check the extrusion system and the machine head.

To correctly understand the working principle of the plastic granulator, the plastic granulator can be properly used and properly maintained.

Please pay attention to our website for more details:
https://www.recycle-plant.com/plastic-granulator-machine.html