Better Touch Better Business
Contact Sales at CSSSLD.
Changshu smoothly da plastic products factory about four questions of the common modified plastics
by：CSSSLD
2021-01-23
Modified plastics twin-screw extruder is the main production equipment and production technology of common process is: the ingredients of a mixing extrusion & ndash;
Brace a cooling every grain of packing.
Appearance defects is a modified plastics products quality problems, most of the tao, a quality of raw materials and production process, production equipment, production environment and other factors.
Common problems are long, even grain, black spots, discoloration, vacuum, iron filings, plasticizing, carbide, etc.
The changshu da plastic products factory to talk about the problem that common smoothly!
1, galley
2 times greater than normal particles are considered to be the length of the strip. Reasons mainly include the boot brace or broken, material direction is not linear, dicing machine wear or a gap, etc.
solutions:
A. Normal production when adjusting the direction of the article is expected to enter the pelletizing machine and adjust the length of the water;
B. Article break when yan cover should be adjusted source process;
C. Pay attention to the inspection apricot pelletizing motor knife, timely replacement of damaged knife;
D. For the strip should use proper vibrating screen, sieving process.
2, even a grain of
two or more particles together side by side called even granule. Reasons mainly include the brace length of article is broken, the water is insufficient, etc.
solutions:
A. Extrusion brace when the article selects the width of the right guide wheel, separate together the material;
B. Adjust the appropriate length of cooling water, that is, at reducing even grain;
C. For the even grain can use mesh sieve sieve.
3, black spots
black spot particles in particle surface or exists. Caused the main reason for the black spots are: cleaning machine is not clean; Raw material of black spots; Screw carbide: environmental pollution.
solutions:
A. Production in the process of cleaning machine, not clean, to clear the machine;
B. Strengthen the incoming inspection, especially filling paste or flame retardant is easier to appear black spots, impurity phenomenon;
C. Pay attention to control adjusting screw barrel temperature and material in the screw tubes inside the residence time, prevent the processing temperature is too high;
D. Pay attention to the surrounding environment health, the isolation between different color products machine manufacturing, protection is necessary.
4, color change
show the product color all of a sudden change in the process of production, appear off color. Discoloration main causes uneven mixing; Cleaning machine is not clean; The temperature is too high; Shear is too strong.
solutions:
A. In strict accordance with the mixing process, to ensure that the mixing uniformity;
B. Cleaning machine to finish the year after inspection locations, ensure clean machine clean;
C. Extrusion temperature control to prevent the toner high temperature decomposition;
D. Choose the appropriate screw combination, avoid too strong shear.
1, galley
2 times greater than normal particles are considered to be the length of the strip. Reasons mainly include the boot brace or broken, material direction is not linear, dicing machine wear or a gap, etc.
solutions:
A. Normal production when adjusting the direction of the article is expected to enter the pelletizing machine and adjust the length of the water;
B. Article break when yan cover should be adjusted source process;
C. Pay attention to the inspection apricot pelletizing motor knife, timely replacement of damaged knife;
D. For the strip should use proper vibrating screen, sieving process.
2, even a grain of
two or more particles together side by side called even granule. Reasons mainly include the brace length of article is broken, the water is insufficient, etc.
solutions:
A. Extrusion brace when the article selects the width of the right guide wheel, separate together the material;
B. Adjust the appropriate length of cooling water, that is, at reducing even grain;
C. For the even grain can use mesh sieve sieve.
3, black spots
black spot particles in particle surface or exists. Caused the main reason for the black spots are: cleaning machine is not clean; Raw material of black spots; Screw carbide: environmental pollution.
solutions:
A. Production in the process of cleaning machine, not clean, to clear the machine;
B. Strengthen the incoming inspection, especially filling paste or flame retardant is easier to appear black spots, impurity phenomenon;
C. Pay attention to control adjusting screw barrel temperature and material in the screw tubes inside the residence time, prevent the processing temperature is too high;
D. Pay attention to the surrounding environment health, the isolation between different color products machine manufacturing, protection is necessary.
4, color change
show the product color all of a sudden change in the process of production, appear off color. Discoloration main causes uneven mixing; Cleaning machine is not clean; The temperature is too high; Shear is too strong.
solutions:
A. In strict accordance with the mixing process, to ensure that the mixing uniformity;
B. Cleaning machine to finish the year after inspection locations, ensure clean machine clean;
C. Extrusion temperature control to prevent the toner high temperature decomposition;
D. Choose the appropriate screw combination, avoid too strong shear.
Custom message
