high speed pp twin screw extruder- China Factory Suppliers Manufacturers

2022 CIM: Compounding Intelligent Manufacturing Conference is coming.
Nanjing Jieya team warmly welcome your visiting.
Booth no.: E10
Date: 2022.9.14-16
Address: Suzhou, China

See you~

 

In plastic extrusion molding equipment, the plastic extruder is usually called the main machine, while its subsequent equipment plastic extrusion molding machine is called the auxiliary machine. Plastic extruders can produce a variety of plastic products. Therefore, the plastic extrusion molding machine is one of the widely used machines in the plastics processing industry, both now and in the future. So what are the characteristics of plastic extruders? The following is a detailed introduction.

 

Here is the content list:

• Modularity and specialization

• High efficiency and multi-functionalization

• Enlargement and precision

• Intelligent and networked

 

Modularity and specialization

The modular production of plastic extruders can adapt to the special requirements of different users, shorten the research and development cycle of new products, and strive for a larger market share; while specialized production can arrange the production of each system module component of extrusion molding equipment at a fixed point or even for global procurement, which is very beneficial to ensure the quality of the whole period, reduce costs and accelerate the capital turnover.

 

High efficiency and multi-functionalization

The high efficiency of plastic extruders is mainly reflected in the high output, low energy consumption, and low manufacturing cost. In terms of function, the screw plastic extruder has been used not only for extrusion molding and mixing processing of polymer materials but its use has been broadened to food, feed, electrode, explosives, building materials, packaging, pulp, ceramics, and other fields.

 

Enlargement and precision

Achieving the large-scale plastic extruder can reduce the production cost, which is a more obvious advantage in the large twin-screw plastic pelletizing set, film blowing set, pipe extrusion set, etc. National key construction services required for major technical equipment, large-scale ethylene project supporting one of the three key equipment of large extrusion pelletizing unit long-term dependence on imports, so we must accelerate the localization process to meet the development needs of the petrochemical industry.

 

Intelligent and networked

Plastic extruders in developed countries have generally used modern electronic and computer control technology, the entire extrusion process parameters such as melt pressure and temperature, the temperature of each section of the body, the main screw and feeding screw speed, feeding volume, the ratio of various raw materials, motor current and voltage and other parameters for online detection, and the use of microcomputer closed-loop control. This is extremely beneficial to ensure the stability of process conditions and improve the precision of products.

 

If you need to buy a plastic extruder, you can consider our cost-effective products. Nanjing JlEYA is the leading manufacturer extruder manufacturer specializing in a twin-screw extruder, mini twin screw extruder, plastic extruder, and parallel twin-screw extruder in China, which is widely used in compounding, modification, polymerization, devolatilization, reaction, recycling, etc. After 17 years of development, now we have a 20,000 square meters workshop with annual sales of over 300+ sets, export over 60 countries.

 

JIEYA has the most experienced technical core team, with extensive experience in system integration of the development manufacturing, materials processing, application technology, and other fields.

 

underwater pelletizing machine is similar to airflow granulator and water jet granulator. The equipment part mainly covers: plastic granulator, single and twin screw plastic extruder, plastic film blowing machine, bag making machine, printing machine, coating machine, Adhesive tape machine, tape slitting machine, slitting machine, strapping machine.

• What is the problem of uneven pelletizing by the underwater pelletizing machine?

• What is the workflow of the underwater pelletizing machine?

• What is the technological advantages of the underwater pelletizing machine?

What is the problem of uneven pelletizing by the underwater pelletizing machine?

1. underwater pelletizing machine, the machine head is not evenly heated, and the machine head temperature is stable before starting up;

2. The cooling water of the underwater pelletizing machine is boiled prematurely, and the water should be boiled when the machine head starts to discharge;

3. It is also possible that there is a problem with the hot runner design of the machine head, which is caused by uneven pressure.

What is the workflow of the underwater pelletizing machine?

Before being made into final products, most polymers must be blended and then pelletized to become marketable raw materials. The power required by the underwater pelletizing machine is directly proportional to the extrusion volume and exponentially related to the size of the filter screen. There are many different types of pelletizer designs, but all pelletizers have some common places, and they can be divided into two categories: cold pelletizing system and die face hot pelletizing system. The main difference between the two categories is the time arrangement of the pelletizing process. The cold pelletizing system cuts pellets from the solidified polymer at the end of the process; while in the die-face hot pelletizing system, pellets are cut when the molten polymer emerges from the die, and pellets are processed downstream cool down.

What are the technological advantages of the underwater pelletizing machine?

The underwater pelletizing machine treated by standard process has the following significant advantages:

1. The appearance standard of the products produced by the underwater pelletizing machine is exquisite and bright;

   
   

2. The hardness of the wear layer in contact with the material by the underwater pelletizing machine can reach HV 600-800, and the local hardness can reach HV900-1100. The hardness is increased to 2-4 times the original hardness. Compared with the non-standard machine without heat treatment, it is resistant to The wear performance is increased by 3-5 times;

3. The products of the underwater pelletizing machine are not deformed after long-term use, effectively avoiding the screw breaking due to the excessive wear of the barrel, and the stable service life is 2-3 times that of the traditional machine, which greatly reduces the investor's investment in replacement parts;

4. The wear-resistant layer of the barrel screw produced by the underwater pelletizing machine has high hardness, while the base material still retains good toughness and processing performance;

5. The service life of the screw of the underwater pelletizing machine has increased from the hundred-ton level of the ordinary plastic pelletizing machine to the thousand-ton level.

Nanjing JlEYA has focused on the production and development of underwater pelletizing machines for several years, and they have always put the needs of customers as their top priority. Here, you can choose the underwater pelletizing machine that suits your need.

The plastic extruder is a common plastic machinery equipment, in the process of the daily operation of the extruder, the extruder will have a variety of failures, affecting the normal production of plastic machinery, the following we will analyze the extruder failure.

 

Here is the content list:

• Unstable host current

• The main motor can not start

• The head is not discharged smoothly or blocked

• The main electric starting current is too high

• The main motor makes an abnormal sound

 

Unstable host current

1. Production reasons.

(1) Uneven feeding.

(2) The main motor bearing of the plastic extruder is damaged or poorly lubricated.

(3) A section of the heater is out of order and does not heat up.

(4) The screw adjustment pad is not correct, or the phase is not correct, and the component interferes.

2. Treatment methods.

(1) Check the feeder, troubleshooting.

(2) Overhaul the main motor of the plastic extruder, replace the bearings if necessary.

(3) Check whether each heater is working properly, replace the heater if necessary.

(4) Check the adjustment pad, pull out the screw to check whether there is interference with the screw.

 

The main motor can not start

1. Causes.

(1) There is a mistake in the start-up procedure of the plastic extruder.

(2) The main motor thread has a problem, whether the fuse is burned ring.

(3) The main motor-related chain device to function

2. Treatment methods.

(1) Check the program, reboot the machine in the correct boot sequence.

(2) Check the main motor circuit.

(3) Check whether the lube oil pump of the plastic extruder is started and check the status of the chain device associated with the main motor. The oil pump is not on and the motor cannot be turned on.

(4) The inverter induction power has not been discharged. Turn off the main power and wait for 5 minutes before starting again.

(5) Check whether the emergency button is reset.

 

The head is not discharged smoothly or blocked

1. Causes.

(1) A section of the heater does not work, and the material is not plasticized well.

(2) The operating temperature setting is low, or the molecular weight distribution of plastic is wide and unstable.

(3) There may be foreign substances that do not melt easily.

2. Treatment methods.

(1) Check the heater of the plastic extruder and replace it if necessary.

(2) Verify the set temperature of each section, and if necessary, consult with the technician to increase the temperature setting.

(3) Clean and check the extrusion system and the head.

 

The main electric starting current is too high

1. Causes.

(1) Insufficient heating time and high torque.

(2) A section of the heater does not work.

2. Treatment methods.

(1) Apply hand pan machine when starting, if not easy, extend the heating time or check whether each section heater is working properly.

 

The main motor makes an abnormal sound

1. Produced by.

(1) The main motor bearing of the plastic extruder is damaged.

(2) The main motor silicon controlled rectifier line in silicon controlled damage.

2. Treatment methods.

(1) Replace the main motor bearings.

(2) Check the silicon-controlled rectifier circuit, if necessary, replace the silicon-controlled components.

 

Our company's website is https://www.njjyextrusion.com/. If you still have questions, you can contact us on the official website.

The twin screw extruder's standard equipment includes a sturdy base frame dedicated to housing the temperature control unit and oil lubrication system. The equipment features advanced control software for seamless integration into digital factories, ready for Industry 4.0, greatly improving ease of use. The following is a detailed description of the operating procedures of the twin screw extruder.

 

Here is the content list:

l Start up operation

l Stop the machine

l Precautions

 

Start up operation

1.Close the power main gate of the twin screw extruder.

2. Turn on the power at the operation panel: Press and hold the power button clockwise to turn and then release.

3. Set the temperature of each temperature zone: for example, a zone temperature according to the process requirements set the corresponding temperature, press the set button, and then adjust the up and down arrows to the desired temperature, press the set button.

4. Set the feeding rate: according to the process, requirements can be fed rate between 0 ~ 10 to set.

5. Set the host speed of the twin screw extruder: set the host speed between 0~30 according to the process requirements.

6. Add cooling water to the cooling tank.

7. In turn on the fan: press the operation button on the operation panel.

8. When you need to start the operation of the vacuum pump, you can start the vacuum pump.

9. Turn on the cutter switch.

 

Stop the machine

1. Twin screw extruder normal stopping sequence: stop the feeder: close the vacuum line valve, open the vacuum chamber on the cover; gradually reduce the main screw speed; shut down the pelletizer and other auxiliary equipment: off the motor, each external water inlet valve.

2. Twin screw extruder emergency stop: (1) in case of an emergency need to stop the host, you can quickly press the electrical control cabinet red emergency stop button, and the host and the feed speed knob back to zero, and then the total power switch off. After eliminating the fault, you can restart the machine again in normal driving order. (2) encounter equipment automatic protection trip stop: need to set the various parameters knob to zero, and then reset the parameters, press the reset button and start the machine again.

 

Precautions

1. The normal production of the first shift machine, be sure to first check whether the barrel, hopper seal is the original closed kind, such as changes or damage, should check the hopper, the machine inside the Jane there are no foreign objects.

2. Pay attention to the screw to start at a low speed, the air time can not exceed 3min.

3. Must pay attention to check the purity of each batch of material, do not allow any impurities mixed into the material.

4. The beginning of the material to pay attention to the first small amount, evenly added material, while paying attention to observe the current meter (torque meter) pointer changes.

For granular material, use metering to add material. When you first start to feed production, be sure to pay attention to the extruder production work overload phenomenon. After the forming die lip out of the material, and then gradually increase the screw speed as appropriate.

5. Often check the working condition of the motor carbon brush, abnormalities should be replaced or adjusted promptly.

6. The screw cleaning work is not allowed to use steel tools scraping material, the application of copper brush, shovel cleaning.

7. When the process temperature is suspected of displaying problems on the instrument, use mercury temperature, meter actual measurement of the machine Jane, and molding mold degree. Refer to the mercury temperature measured temperature, adjust the calibration instrument to show the temperature.

 

If you still have questions, you can consult our company. Our company's website is https://www.njjyextrusion.com/

The screw can be said to be the heart of the injection molding machine. The quality of the screw determines the quality of the product. The plasticizing screw of the engineering plastic twin screw extruder has the functions of conveying, melting, mixing, compression, metering and exhausting. It plays an important role in the quality of plasticization and is a key factor affecting the quality of plasticization.

• What is the difference between engineering plastic twin screw extruder and single screw extruder?

• What are the characteristics of engineering plastic twin screw extruder?

• What are the structural principles of engineering plastic twin screw extruder?

What is the difference between engineering plastic twin screw extruder and single screw extruder?

1. Price: single screw extruder has simple structure and low price; Engineering plastic twin screen expander is complex and expensive

2. Plasticizing capacity: single screw extruder is suitable for plasticizing and extruding polymers and granular materials. The shear degradation of polymer is small, but the residence time of material in extruder is long; The engineering plastic twin screw extruder has good mixing and plasticizing ability, and the residence time of materials in the extruder is short, which is suitable for powder processing.

3. In terms of processing capacity and energy consumption: the engineering plastic twin screw extruder has large output, fast extrusion speed and low energy consumption per unit output, while the single screw extruder is poor.

4. Operability: the single screw extruder is easy to operate and the process control is simple; The operation of engineering plastic twin screen expander is relatively complex and the process control requirements are high.

What are the characteristics of engineering plastic twin screw extruder?

1. engineering plastic twin screw extruder is divided into parallel and conical according to the relative position of the two axes;

2. engineering plastic twin screw extruder is divided into meshing type and non-meshing type according to the two screw meshing procedures;

3. engineering plastic twin screw extruder is divided into the same direction and the opposite direction according to the rotation direction of the two screws, and there are inward and outward points in the opposite direction;

4. engineering plastic twin screw extruder is divided into high speed and low speed according to the screw rotation speed;

5. engineering plastic twin screw extruder is divided into whole and combination according to the structure of screw and barrel.

What are the structural principles of engineering plastic twin screw extruder?

For the basic mechanism of the engineering plastic twin screw extruder process, in simple terms, a screw rotates in the barrel and pushes the plastic forward. The screw structure is an inclined surface or slope wound on the center layer, the purpose of which is to increase the pressure in order to overcome the greater resistance. As far as the engineering plastic twin screw extruder is concerned, there are three kinds of resistance that need to be overcome during work: one is friction, which includes the friction of solid particles (feeding) against the barrel wall and the first few revolutions of the screw (feeding zone). There are two kinds of mutual friction forces; the second is the adhesion of the melt on the cylinder wall; the third is the internal logistics resistance of the melt when it is pushed forward.

Nanjing JlEYA has focused on the development and production of engineering plastic twin screw extruders for several years. And it commits to provide perfect service for every customer from all over the world.

Nanjing JIEYA hereby sincerely invited you to attend 2021  China (Hainan) Degradation Exhibition.

Our booth no.: B06

Time: June 23-25

Add: Hainan International Convention and Exhibition Center

We warmly welcome your coming and look forward to cooperate with you ;)

The high efficiency of the single-screw extruderis mainly reflected in high output, low energy consumption, and low manufacturing cost. In terms of function, the plastic extruder has been used not only for extrusion molding and mixing processing of polymer materials but its use has been broadened to food, feed, electrode, building materials, packaging, ceramics, and other fields. So how to operate the single screw extruder? The following is a detailed introduction.

 

Here is the content list:

• Preparation work before starting the machine

• Start-up operation

• Stop operation

 

Preparation work before starting the machine

1. For single-screw extruder extrusion production of materials, should meet the required drying requirements, if necessary, further drying.

2. According to the variety of products, size, select the head specifications, the machine will be installed in the order of the column, installed head flange, die body, mouth die, porous plate, and filter network.

3. Connect the compressed air pipe, install the core mold electric heating rod head heating ring, check the water system.

4. Adjust the gap evenly in all parts of the mouth die and check whether the centerline of the main machine and the auxiliary machine are aligned.

5. Start the single-screw extruder of each running equipment, check whether the operation is normal, and find faults in time to eliminate.

6. Turn on the electric heater, the head, body, and auxiliary machine evenly heated up, to be the temperature of each part than the normal production temperature of about 10 degrees, constant temperature of 30 ~ 60 minutes so that the machine temperature inside and outside the same.

 

Start-up operation

Start-up is an important part of the production, poor control will damage the screw and head, the temperature is too high will cause plastic decomposition, the temperature is too low will damage the screw, barrel, and head. The start-up steps are as follows.

1. Start the machine at low speed, idle, check the screw for any abnormalities and motor, amperage meter current no overload phenomenon, the pressure gauge is normal. Machine idling should not be too long to prevent the screw and barrel-scraping grinding.

2. Gradually add a small amount of material, wait for the material extrusion out of the die, before the normal addition of material. Before the plastic is extruded, no one should be in front of the mouth die to prevent casualties.

3. After the plastic is extruded, it is necessary to lead the extruded material slowly on the cooling and shaping, traction equipment, and start this equipment beforehand. Then, according to the control instrument indication value and the requirements of the extruded products, each link will be properly adjusted until the extrusion operation reaches the normal state.

4. Cutting and sampling, checking whether the appearance meets the requirements, whether the size meets the standard, quickly testing the performance, and then adjusting the extrusion process according to the requirements of quality, so that the products meet the standard requirements.

 

Stop operation

1. Stop feeding, extrude the plastic in the single screw extruder and turn off the power of the barrel and head for the next operation.

2. Shut off the power of the main machine and the auxiliary machines at the same time.

3. Open the head connection flange, clean the porous plate and various parts of the head, when cleaning, should use copper rods, copper pieces, after cleaning, apply a little oil. Screw, barrel clean up, if necessary, the screw from the end of the machine out of the top, clean up after recovery, in general, available for the transition of material cleanup.

4. Extrusion of polyolefin plastics, usually in the extruder full load shutdown (with material shutdown), when the air should be prevented from entering the barrel, so as not to oxidize the material and affect the quality of the product when continuing production. For polyvinyl chloride plastics, can also stop with material, then close the material door, reduce the temperature at the head connection body (flange) 10 ~ 20 degrees, to stop the machine after the material squeeze net.

5. Close the total power and cooling water main valve.

 

If you still have questions, you can consult our company. Our company's website is https://www.njjyextrusion.com/

 

 

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