The single screw extruder is mainly used for extruding soft and hard polyvinyl chloride, polyethylene, and other thermoplastic. It can be a variety of plastic products such as bubble sheets, extruded pipes, press plates, ribbons, etc. process and can also be used for melting granulation. The plastic extruder is characterized by advanced design, high quality, good plasticization, and low energy consumption. It uses an evolutionary drive and is characterized by low noise development, stable operation, great durability, and long service life.
What are the relevant parameters of a single screw extruder?
What are the properties of a single screw extruder?
For which materials can a single screw extruder be used?
The relevant parameters of the insertion extruder are arranged from left to right: the first field is the plastic machine code as S; the second box is the extruder code as J; the third field is the code for the different construction firms of the extruder. The three bars are combined, the plastic extruder is SJ; the ventilated plastic extruder is SJP; the plastic foam extruder is SJF; the extruder with plastic input is SJW; the plastic shoe extruder is SJE; The cascade plastic extruder is SJJ; the double-screw extruder is SJS; the conical double-screw extruder is SJSF; the multi-screw extruder is SJD. The fourth box is for auxiliary machinery with the code name F; in the case of an extruder unit with the code name E. The fifth parameter refers to the snail diameter and the ratio of length to snail diameter. The sixth field refers to the product's pattern sequences, which in the order of letters A, B, C... is arranged and the sample number is not given in the first sample.
(1) The material support of the inlet extruder is mainly based on friction, which limits the conveyance performance of the inlet extruder. The addition of powder, paste, fiberglass, and inorganic fillers is difficult.
(2) If the head pressure of the inlet extruder is high, the counter current increases, which reduces the productivity of the inlet extruder.
(3) Injected exhaust gas extruder material has a low surface regeneration effect in the suction zone, so the suction effect of the inlet extruder is poor.
(4) Injection extruder is used for certain processes, such as polymer dyeing, heat-resistant powder processing, etc. not suitable. The single screw extruder is a high-speed and high-yield extrusion based on a high level.
single screw extruder series, single screw extruders can be used for the processing of PP, PE, PS, ABS, PMMA, PVC, and other thermoplastic tubes, plates, plates, rods, profile materials, and plastic granulation products. For different raw materials and product specifications, the screw assumes different length-diameter ratios and compression ratios, and the flow assumes different structures. Choose the right cylinder, screw, and drive mechanism to meet the processing requirements of high-quality products.
The use of single screw extruders is becoming increasingly widespread. Nanjing JlEYA has been concentrating on single screw extruders for several years. They will make every effort to meet the needs of users.
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
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.
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.
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.
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.
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 single screw extruder is a special reduction power device designed for plastic and rubber single screw extruder equipment. The reducer is matched with the motor. The gear parts are made of high-strength alloy steel. The gears are processed by carburizing, quenching, and high-precision gear grinding. The gear accuracy is level 6, and the tooth surface hardness is HRC58-62.
What is the principle of single screw extruder?
What is the current industry development of single screw extruder?
What should I pay attention to when using single screw extruder?
The single screw extruder is generally divided into three sections in effective length. The effective length of the three sections is determined according to the diameter of the screw and the pitch and depth of the screw, which are generally divided into one-third of each; the last thread of the single screw extruder has been called the conveying section. It is required that it cannot be plasticized, but it must be preheated and compressed;
The second section of the single screw extruder is called the compression section. At this time, the volume of the screw groove gradually decreases, and the temperature must reach the degree of plasticization of the material. The compression produced here is from the conveying section three, and here it is compressed to one. Some machines also have Change, the plasticized material enters the third stage;
The third section of the single screw extruder is the metering section, where the material maintains the plasticizing temperature to supply the machine head, which is generally slightly higher than the plasticizing temperature.
In single screw extruder equipment, the plastic extruder is normally referred to as the main machine and the following equipment, the plastic extruder, is referred to as the auxiliary machine. After more than 100 years of development, the plastic extruder has been derived from the original single-screw extruder, a variety of models such as double-screw, multi-screw and even non-screw models have been derived. The plastic extruder (host) can be used with different plastic moulding machines such as tube, foil, holding material, monofilament, flat wire, strapping, extruding network, plate material, profile material, pelleting, cable coating, etc. are used. Suitable for different plastic extrusion production lines for the production of different plastic products. Therefore, plastic extrusion machines are today and in the future one of the most common models in the plastics processing industry.
What should I pay attention to when using single screw extruder?
(1) The material convey way of the single screw extruder mainly relies on friction, which limits its feeding performance. And it is difficult to add the powder, paste, glass fiber and inorganic fillers, so pay attention to the material used.
(2) When the pressure of the single screw extruder head is high, the reverse flow will increase and the productivity will decrease. Therefore, always pay attention to the pressure of the equipment.
(3) The surface renewal effect of the single screw extruder material in the exhaust zone is small, so the exhaust effect is poor.
(4) single screw extruder is not suitable for certain processes, such as polymer coloring, thermosetting powder processing, etc.
The single screw extruder has achieved an irreplaceable position in industrial production. Nanjing JlEYA is committed to providing various bending and rolling machines of high quality for all customers from all over the world.
Nanjing JIEYA attend Chinaplas 2021 held in Shenzhen. We sincerely welcome your visiting.
Our booth no.: 7Q25
Time: April 13-16, 2021
Address: Shenzhen World Exhibition Center
Look forward to meet you at there.
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