At present, in the plastic product manufacturing industry, the extruder production line with the extruder as the core equipment is mainly used for production. During the production process, there will still be some quality problems in the plastic products. We need to analyze the product quality problems to be better.to resume production and obtain quality plastic boards or sheets. As a manufacturer with many years of experience in manufacturing plastic extruders and equipment required for corresponding production lines, the author has prepared the following information for you:

1. The longitudinal thickness dimension error of the plastic board is large

①The temperature control of the extruder barrel is unstable, resulting in an unstable flow rate of molten material.

②The screw speed of the plastic extruder is not stable, It is impossible to guarantee the smooth extrusion amount of molten material.

③The roller speed in the three-roller calendar is not stable.

④The running speed of the tractor is not smooth, sometimes fast and sometimes slow.

2. The transverse thickness of the board size error is large

①The temperature control of the specific parts of the molding die at the head of the extruder is unreasonable.

②The specific melt cavity design(or processing)is not reasonable so the melt flow distribution is uneven.

③The lip gap adjustment is not reasonable, the gap is not uniform, and the middle gap should be slightly less than the gap on both sides.

④Three roller gap adjustment error is large.

⑤The selection or processing of the height of the three rollers is unreasonable, and the height of the roll surface should be appropriately changed.

3. The board surface has horizontal lines

①The screw speed of the extruder is unstable, and the amount of extruded melt is not uniform.

②The temperature control of the extruder barrel is unstable, and the flow rate of molten material changes.

③The speed of the three rollers is not smooth or there are scratches on the roller surface.

④The traction speed is not smooth or the traction roller compression force is not enough, the product operation is not smooth.

4. The board surface has longitudinal lines

①The screen changer at the head of the extruder is broken.

②There are scratches on the lip surface of the mold.

③There are foreign bodies or decomposed materials in the mold body.

5. The board surface is rough and matt

①Three roller-working faces rough or sticky.

②The working temperature of the three rollers is low.

③The lip surface of the mold is not smooth.

④The screen changer is broken.

The above is the basic analysis of the quality problems of the extrusion molding production board or sheet of the extruder production line. If you have more needs, welcome to inquire or visit the factory, we will provide you with professional equipment procurement advice and technical guidance.