The extruder is a product that has been completed in a multi-process. It is always used in many scenes and is produced by many manufacturers. Some common-sense knowledge about extruders requires us to learn and understand effectively, which is more conducive to extruder procurement and later use. So what if the extruder fails?

There are several problems with the extruder. This article mainly describes the two phenomena of scorch and plasticization.

1. The phenomenon of scorching

(1) The temperature reflects super high, or the instrument that controls the temperature fails, causing the plastic to be ultra-high temperature and scorched.

(2) The nozzle of the machine head has a large smoke, a strong irritating odor, and a buzzing sound.

(3) Granular scorch on the surface of the plastic.

(4) There are continuous pores at the joints.

2, the cause of the scorch

(1) The temperature control is super high, causing the plastic to burn.

(2) The screw is used for a long time without cleaning, and the scorch is accumulated and extruded with the plastic.

(3) The heating time is too long, and the plastic deposits are heated for a long time, which causes the plastic to deteriorate and burn.

(4) The parking time is too long, there is no cleaning head and screw, which causes the plastic to decompose and burn.

(5) Multiple mold changes or color changes, causing the plastic to decompose and burn.

(6) The head cover is not pressed, and the plastic is aged and decomposed inside.

(7) The instrument that controls the temperature fails, causing scorch after ultra-high temperature.

3, the method of eliminating burnt

(1) Regularly check if the heating system is normal.

(2) Clean the screw or the machine head regularly and thoroughly clean it.

(3) According to the requirements of the process, the heating time should not be too long. If there is any problem with the heating system, it is necessary to find relevant personnel in time to solve it.

(4) Change the mold or change color in a timely and clean manner to prevent mottling or burnt scorching.

(5) After adjusting the mold, the mold cover should be pressed tightly to prevent the glue from entering.

1. Poor plasticization

(1) The surface of the plastic layer has a phenomenon of suede.

(2) The temperature control is low, the meter pointer reflects the low temperature, and the actual measurement temperature is also low.

(3) The surface of the plastic is black, and there are tiny cracks or small particles that are not plasticized.

(4) The plastic glue is not well stitched, and there is a clear trace.

2, the cause of poor plasticization

(1) The temperature control is too low or the control is not suitable.

(2) There are resin particles which are difficult to plasticize in plastics.

(3) The operation method is improper, the screw and traction speed are too fast, and the plastic does not completely reach plasticization.

(4) The plastic mixing is uneven during granulation or the quality of the plastic itself.

3. Methods for eliminating poor plasticization

(1) Control the temperature according to the process regulations, and find that the temperature is low and the temperature should be raised appropriately.

(2) It is necessary to appropriately reduce the speed of the screw and the traction, so that the plastic heating and plasticizing time is increased to improve the plasticizing effect of the plastic.

(3) Using screw cooling water to strengthen the plasticization and compactness of the plastic.

(4) When the mold is selected, the mold sleeve is appropriately smaller to strengthen the pressure of the glue outlet.

What should I do if the extruder malfunctions? Through the above introduction, what do you think about how to solve the extruder failure? In general, there are many reasons for the failure of the extruder. When we find that the extruder is malfunctioning, the first choice is to find the specific cause, and then we can prescribe the right medicine.

Editor in charge: Wang Zhen

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