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What problems commonly occur with plastic extruders?

Time：

2019-10-30

Have you ever considered the practical effectiveness of plastic extruders? In our daily lives, these machines deliver high efficiency and impressive performance. But did you know they’re also widely used in many settings—such as assembly lines—to significantly boost productivity and reduce workers’ hours. That said, during operation, some malfunctions can arise. When faced with such issues, it’s important to have effective troubleshooting strategies. Here’s an overview: 1. Unstable main motor current. 2. Excessively high starting current for the main unit. Common causes include insufficient preheating time for the extruder (material…).

Have you ever considered the practical benefits of plastic extruders? In our daily lives, these machines deliver high efficiency and impressive results. But did you know they’re also widely used in many settings—such as assembly lines—to significantly boost productivity and reduce workers’ hours? That said, like any piece of equipment, they can encounter malfunctions during operation. When such issues arise, it’s important to have effective troubleshooting strategies in place. Let us walk you through some common solutions.

1. The host current is unstable.

2. The drive motor’s inrush current is excessively high. Common causes of this fault include insufficient preheating time for the extruder (resulting in incomplete plasticization of the material and increased screw‑rotational resistance) or a malfunctioning heater in a particular section.

　　3. The main motor emits abnormal noises; the possible causes of this fault include: damage to the motor bearings or failure of a specific thyristor in the motor’s silicon-controlled rectifier circuit.

　　4. Excessive rise in the main motor bearing temperature is typically caused by inadequate bearing lubrication or severe bearing wear.

　　Solution

　　1. Solutions for excessive starting current in the host include:

　　A. Start up the extruder strictly in accordance with the startup procedure.

B. Inspect the heater’s operating condition and replace any damaged heaters.

　　2. The methods for resolving abnormal noises from the main motor are:

　　A. Replace the main motor bearing;

B. Inspect the thyristor rectifier circuit and replace the thyristor components as needed.

3. Solutions for excessive bearing temperature rise in the main motor include:

A. Inspect and add bearing lubricant;

B. Inspect the motor bearings for proper operation and replace them as needed.