The cellulose fiber card can't be stopped for a long time, and some typical problems will be encountered when restarting the drive: static electricity entanglement, rust on the bottom of the movable cover, doffing of the doffer triangle area, rusting of the card clothing, and no sliver in the coiler, etc. Production efficiency and quality.
Causes and control measures of typical problems caused by cold-opening of differentiated fiber carding machine
1
Causes and treatment measures of metal card clothing rust
Cause: Cellulose fiber contains oil agent and titanium dioxide, etc. During the normal production process of metal clothing, the fiber is rubbed, and the metal matrix has been fully exposed. If it is not operated for a long time, oxidation will occur.
Impact: 1) Insufficient sharpness affects the carding effect, resulting in an increase in neps; 2) At the same time, the clothing card use cycle will be shortened.
Control measures: For machines with severe rust on the clothing of the cylinder, after the normal driving, the cylinder is reversed and cleaned. For rusty parts, first brushing is recommended. It is recommended to use talc for pre-painting. You can use a thin copper wire brush to handle. Manually turning and brushing the parts, especially the card clothing at the separation point is easy to rust. The rusty drive has lateral cloud spots. ; Manually brushed machine, before the normal production with waste cotton once again, after maturity before production. If there is a rusty card clothing, spray with a rust-removing cleaner, treat it, and then clean it with a copper brush.
2
Causes of rust on movable cover card clothing and treatment measures
Reasons: 1) After the machine is stopped, the steel needles and cover card base cloths are highly hygroscopic after the machine is cooled, which causes rust when it is parked for a long time; 2) After the workshop is stopped, condensation water accumulates and drips. Causes rust; 3) Accumulation of flowers on the card clothing of the cover plate is treated cleanly, and the differentiated fibers have strong hygroscopicity, which causes rust; 4) Some dyeing materials, acid and alkali residues, and long-term parking corrosion and oxidation cause problems.
Effects: The rust of the card clothing on the cover plate is not processed in time, which can cause problems such as needle breakage, needle drop, and poor sharpness, which affect the carding effect and effect; at the same time, the needle drop enters the rear and causes rubber roller damage.
Control measures: 1) Brush the cover with a wire brush to remove accumulated fibers; 2) Idle the cover for 1 to 2 hours, and clean the rusty parts with talcum powder; 3) Use thick cotton for long-term parking Cotton quilt covers.
3
Causes and measures of landing in Xilindorf's triangle
Reasons: 1) The mechanical parts of the triangle area of Doffer Cylinder are parked for a long time, which causes dust collection, oil residue, etc., and hanging flowers when driving cause the air flow in the triangle area to be affected; 2) Some fibers are cooled by the temperature and humidity. As a result of static electricity, the area around the forest and the doffer caused nodding in the triangle.
Impact: Affects production efficiency and cannot drive at high speed.
Control measures: 1) clean up the dust collection and oil agent, the focus is on the cover plate at the bottom of the large leak bottom, the lower cover of the doffer; 2) adjust the distance between the bottom of the large leak bottom entrance and raise the position of the cover of the doffer by 1 mm to 3 mm 3) Control the temperature and humidity of the cold car, and reduce static electricity.
4
Causes and measures of electrostatic entanglement
Reason: If you do not drive for a long time, the workshop is relatively dry, the temperature is relatively low and the temperature is raised slowly, which provides conditions for the generation of static electricity.
Impact: 1) Affect production efficiency and cause quality degradation; 2) The problem of thick flowers around the rollers, cylinders, doffers, and cover plates.
Control measures: 1) Make the return air quickly heat up the workshop to ensure that the temperature is 22 ° C; 2) Increase the humidity in the workshop, and ensure that the relative humidity is 60%, to create conditions to relieve static electricity; 3) Sprinkle hot water in the workshop ( 50 ℃) to ensure the moisture regain in the workshop and quickly eliminate static electricity.
5
Coiled sliver tube without sliver
Cause: If the machine is stopped for a long time, the oil, dust, and wax in the coil will harden and become sticky, causing problems when driving.
Impact: Affect the delivery speed and production efficiency.
Control measures: 1) Clean the cotton wax in the inclined pipe with alcohol to ensure smooth and smooth inside the inclined pipe; 2) Clean the passage with 揩 car cloth to ensure smooth.
Precautions for Differentiated Fiber Carding Machines
1) Under the condition of moisture regain, the clothing has surface rust phenomenon. First open the fan and run it for 2 hours;
2) After spraying the card clothing with rust remover, brush it once with a brush roller, and then lightly coat it with talcum powder; general mechanical parts, coiled beveled channels are wiped with alcohol or warm water;
3) Drive empty car for 4 hours to provide conditions for temperature rise in the workshop; follow-up sliver test is continuously stable within 4 hours to ensure stable quality;
4) Check the electric control box for contact short circuit after being wet;
5) Run slowly and check whether the total air pressure and negative pressure are normal to prevent the CV value from changing;
6) Pay attention to the stable and timely exchange of raw materials during the official resurgence to prevent problems such as large differences;
7) The temperature in the workshop is controlled at 25 ° C, and the relative humidity is controlled at 60%. It is impossible to actively use the return air and spray hot water.
In short, the differential fiber carding machine will stop for a long time, which will cause the card clothing to rust and collect dust. When the machine restarts, there will be a sudden increase in neps, electrostatic entanglement, the bottom of the movable cover will rust, the doffer triangle area will be caught, and the clothing Rust, sliver sliver does not fall, etc., affect production efficiency and quality, take effective measures and correct opening methods to address these problems, can control these problems, and ensure the smooth operation of differentiated fibers.
