Extruder common fault about eleven kinds,the following details of the eleven kinds of failure under extreme exclusion method:First, the main motor bearing temperature rise is too high:1,the cause:(1)bearing lubrication bad.(2)bearing wear serious.2,the cause:(1)Check and add lubricant. Check the motor bearings and replace them if necessary.Second,the head pressure instability:1,the cause:(1)The main motor speed is not uniform.(2)feeding motor speed is not uniform, feed volume fluctuations.2,treatment:(1)Check the main motor control system and bearings.(2)Check the feed system motor and control system.Third,low lubrication oil pressure:1,the cause:(1)Lubricating oil system regulator pressure set value is too low.(2)oil pump failure or suction pipe blockage.2,treatment:(1)Check and adjust the oil pressure regulator valve.(2)check the pump, suction tube.Fourth,the automatic network device is slow or not working1,the cause:(1)low pressure or low oil pressure.(2)Cylinder (or hydraulic station) Leakage (or oil spill).2,treatment:(1)Check the power system of the screen change device.(2)check the cylinder or hydraulic cylinder seal.Fifth,the safety pin or safety is cut off1,the cause:(1)Extrusion system torque is too large(2)The main motor is not connected with the input bearing2, treatment:(1) Check whether the extrusion system has metal and other objects into the jammed screw. At the beginning of the event, check whether the preheating temperature or temperature rise meets the requirements.(2) adjust the main motorSix, the sudden drop in extrusion:1, the cause:(1) failure of the feeding system or no hopper in the hopper.(2) squeeze the system into the hard stuck the screw, so that the material can not pass.2, treatment:(1) Check the material level of the feeding system or hopper.(2) Check the cleaning system.Seven, the host current instability1, the production reasons:(1) feeding is not uniform.(2) the main motor bearing damage or poor lubrication.(3) a section of the heater failure, no heat.(4) screw adjustment pad is wrong, or phase is not right, component interference.2, treatment:(1) check the feeder, troubleshooting.(2) overhaul the main motor, if necessary, change the bearing.(3) Check the heater is working properly, if necessary, replace the heater.(4) Check the adjustment pad, pull out the screw to check whether the screw interference phenomenon.Eight, the main motor can not start1, the cause:(1) the car is wrong.(2) the main motor thread has a problem, fuse wire is burned.(3) The interlocking device associated with the main motor functions2, treatment:(1) Check the program and re-drive in the correct drive sequence.(2) Check the main motor circuit.(3) Check whether the lubricating oil pump is activated and check the status of the interlock device associated with the main motor. The pump does not open and the motor can not be opened.(4) inverter induction power is not finished, turn off the total power to wait 5 minutes after the start.(5) Check if the emergency button is reset.Nine, the nose is poor or blocked1, the cause:(1) a heater does not work, material plastic poor.(2) the operating temperature is set low, or the molecular weight distribution of plastic is wide and unstable.(3) There may be foreign matter that is not easy to melt.2, treatment:(1) Check the heater and replace if necessary.(2) verify the set temperature, if necessary, negotiate with the craftsmen to improve the temperature set value.(3) clean up the extrusion system and head.10,the main power to start the current is too high1, the cause:(1)the heating time is insufficient and the torque is large.(2) a section of the heater does not work.2,treatment:(1) When driving the hand wheel, if not easy, then extend the heating time or check the heat of each section is working properly.Eleven, the main motor abnormal sound:1,the cause:(1) The main motor bearing is damaged.(2)the main motor SCR rectifier line in a thyristor damage.2, treatment:(1)Replace the main motor bearings.(2) check the SCR rectifier circuit, if necessary, replace the thyristor compo

Manufacturing barrels,the current domestic commonly used materials are 45,40Cr and 38CrMoAIA. Imported extruder in the barrel of the manufacturing materials, commonly used alloy steel 34CrAINi and CrMoV9.The yield strength of this material is about 900MPa. After nitriding treatment,the hardness of 1000HV or more,both wear-resistant and good corrosion resistance. Tungsten carbide alloy+nickel alloy cylinder,the use of Material High quality alloy just as the substrate,the hole casting the alloy, to improve the wear resistance of the barrel,Corrosion resistance.

Materials and processesQuality 38CrMoAIAHigh quality duplex stainless steelHigh quality powder metallurgy materialsCold, hot spray hard metal processAdvanced nitriding processCorrosion-resistant, wear-resistant double metal spraying process

Technical indicators:Material selection of high quality 38 chrome molybdenum aluminum(38CrMOALA)quenched and tempered:HB240~280Nitriding hardness:HV≥850Nitriding depth:0.45to 0.80mmNitriding brittleness:≤ twoSurface roughness:Ra0.4Screw Straightness:0.015mmAfter the nitriding surface hard chrome plating:HV ≥ 900Chromium layer thickness:0.03 ~ 0.10mmDouble alloy hardness:HRC56 ~ 65 (alloy with nickel-based alloy)Alloy depth:1.2~3.0mm

1,do not start the machine when the cylinder screw does not reach the pre-set temperature.2,to prevent the metal debris and debris fall into the hopper, if the processing of recycled materials, need to add a magnetic hopper to prevent iron and other into the barrel.3,the use of salivation when the barrel to determine the plastic completely melted, so as not to damage the screw when the drive parts damage.4,the use of new plastic, the cartridge should be more than expected clean.5,when the molten plastic temperature is normal but continue to find the injection products appear black spots or discoloration, should check the screw over plastic head, over the rubber ring, the glue meson wear.6,the product injection molding, try to make the material evenly plastic to reduce the screw to withstand the transmission torque, improve its useful life.