Analysis of Common Problems in the Use of Sealants The quick stacking door has many functions such as heat preservation and cold preservation, insect and wind prevention, dust insulation and sound insulation. Widely used in underground parking lots, industrial plants, food, textiles, electronics, printing and packaging, automotive assembly, precision machinery, logistics and warehousing and other places. Automatic Stacking Doors,High Speed Security Door,Rapid Stacking Folding Door,Automatic Stacking PVC Door Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.highspeedshutterdoor.com
IV. Analysis of common problems in the use of sealants
With regard to the common problems in the use of sealants, we summarize the following points. In practical applications, you may also encounter other problems. You can also refer to this table for research.
problem
phenomenon
the reason
Possible solutions
Not enough glue
The amount of glue does not meet the process requirements or use requirements
1, the air pressure is small
1, increase the air pressure
2, the nozzle is smaller
2, with a larger nozzle
3, nozzle thimble is not open
3, lift the thimble
Too much glue
The amount of glue exceeds the process requirements or usage requirements
1, large air pressure
1, reduce the air pressure
2, larger nozzle
2, with a smaller nozzle
3, nozzle thimble open too small
3, press the thimble
Trailing
Slightly too much sealant in the lid
Cut off is not appropriate
1. Put the thimble into the nozzle
2, reduce the nozzle hole, increase air pressure
3, increase the "end rotation" of the lid
4, use a harder thimble spring
5, replace the nozzle opening cam
Face noodles
When the glue is injected, the nozzle contacts the sealant on the cover
The nozzle is too low
1, increase the nozzle
Splatter
Sealant splashes out of the ditch
1, the nozzle position is too high
1, reduce the nozzle
2, nozzle spray hole too
2. Switch to a nozzle with a smaller orifice
Lack of coating
Less than one full week or two weeks
1, the nozzle cam lobe
1, increase the lobe
2, the air pressure is too low
2, increase the air pressure
3, cover the end of the slide on the chuck
3, change the lid and chuck with the match
4, press pad stick
4, so that the press pad can rotate freely
overlapping
Over two weeks or two weeks
1, the nozzle cam lobe
1, reduce the convex angle
2, high air pressure
2, reduce the air pressure
Film leak
Part of the trench has not been painted
1, low air pressure
1, increase the air pressure
2, low chuck speed
2, increase the chuck speed
accumulation
Sealant accumulates at the nozzle
(see solution)
1. Put the thimble into the nozzle
2, raise the nozzle (when the face occurs)
3, change the tip angle of the thimble to reduce the contact between thimble and nozzle
Dropping
There is a sealant in the middle of the lid
1, due to the tilt of the lid end off the chuck, hit the nozzle
1, stretch the presser foot to the nozzle
2, the nozzle shuts down
2, take the thimble into the nozzle, or replace
3, nozzle opening cam rough
3, replace the cam
The film thickness is not correct
Inconsistent top and bottom thickness
1, nozzle parts wear or loose
1. Fasten the parts
overflow
Sealant overflows from the ditch
(see solution)
1, reduce the air pressure
2, reduce the chuck speed
3, increase the size of the ditch
4, if the overflow is due to overlap, reduce the cam angle
Out of air bubbles
Air bubbles appear in dry liners
Improper drying process
1, increase or reduce the drying temperature
split
Dry lining appears bubbles
Improper drying process
1, increase the drying temperature, and extend the drying cycle
Thin film
In the "plane" at the film too book
1, poor lubrication
1, try a variety of stretching (calendar) oil or emulsion
2, lack of plastic injection
2, (see the above solution to solve the small amount of coating)
Extrusion
In the seaming, the sealant seeps out from the seam
1, improper drying process
1, increase the drying temperature, extend the drying cycle
2, too much plastic injection
2, (see above to solve the small amount of coating