Quality Problems in the Extrusion Molding of Extruder Lines to Produce Plates or Sheets

At present, in the plastic product manufacturing industry, it is mainly produced by the extruder line with the extruder as the core equipment. 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 sheets or sheets.

1. The longitudinal thickness dimension error of the plastic sheet in the extruder line is large

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

② The rotational speed of the screw of the plastic extruder machine is unstable, and the extrusion volume of the melt cannot be guaranteed to be stable.

③ The rotation speed of the rollers in the three-roll calender is not stable.

④ The running speed of the tractor is not stable, it is fast and slow.

2. The lateral thickness dimension error of the extruder line plate is large

① The temperature control of each part of the molding die body at the extruder head is unreasonable.

② The design (or processing) of the melt cavity of the mold body is unreasonable, resulting in uneven distribution of the melt flow.

③ The adjustment of the die lip gap is unreasonable, the gap is uneven, and the middle gap should be slightly smaller than the gap on both sides.

④ The adjustment error of the gap between the three rollers is large.

⑤ If the selection or processing of the middle height of the three rolls is unreasonable, the middle height of the roll surface should be appropriately changed.

3. There are horizontal lines on the board of the extruder line

① The screw speed of the extruder is unstable, and the amount of extruded melt is uneven.

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

③ The rotation speed of the three rollers is not stable or the roller surface has scratches.

④ The traction speed is not stable or the pressing force of the traction roller is insufficient, and the product runs not smoothly.

4. There are longitudinal lines on the surface of the extruder line

① The filter screen at the extruder head is broken.

② There are scratches on the die lip surface.

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

5. The surface of the extruder line is rough and dull

① The working surface of the three-roller is rough or sticky.

② The working temperature of the three rollers is low.

③ The die lip surface is not smooth.

④ The filter screen is broken.

Kailite products include two categories of plastic machinery and plastic products, including the manufacture and sales of plastic processing equipment and spare parts, the processing and sales of plastic sheets, plastic pipes, and plastic profiles. Enterprises export products and technologies from business and enterprises need machinery parts Parts, raw and auxiliary materials import business.

With strong technical force, sophisticated production equipment and scientific management, the company has continuously introduced cutting-edge products in the industry, and has established long-term and stable cooperative relations with many universities and research institutes. If necessary, welcome to consult.