Chopper role is to Astoria from top of the cylinder acess batt intact peeled off to form a fleece. Stripping action areas on the carding machine is mainly refers to the role of the cutters and the Astoria area between the terms.
Chopper by chopper swing arm and blade chopped composed. Swing arm is eccentric, in order to maintain the balance of the high-speed operation. Chopper arm 6 to 8. Cut with a saw blade is serrated. Chopper speed is generally 500 to 1000 times / min. Between the blade and cut the tip of Astoria gauge of 0.25 to 0.3 mm. Chopper swing of about 40 mm, swing position can be adjusted.
First, the chopper mechanism stripping effect
Chopper work as shown in Figure 53. Chopper speed swing. Every twist once, from Astoria to surface stripping a length of fleece, but each time the knife cut the fleece stripping length is not equal to the size of the stroke, but with a surface speed of Astoria, chopper level, effective stroke size, cut knife working properly or not state and clothing have a relationship.
Chopper in the valid reason for stripping stroke fleece, the main thing is to fleece a knife cut the impact force. Chopper placed to 500-1000 times per minute, so each time the chopper combat role fleece for a very short time. Fleece stress situation shown in Figure 54.
Reaches the lowest point in the chopper and start back up without stripping hair net, fleece is relying on its own by the chopper and I have the kinetic energy of the hair curtain traction tension, automatic off from doffer surface. Further stripping knife cut fleece and also hold the friction force between the fleece fibers about.
Second, the relationship between the speed of the chopper and Astoria
When the husband speed constant, the chopper must choose the correct speed compatible. If the chopper is too slow, it can not quickly peeled off the fleece. If the chopper speed is too high, there is no need in addition to outside, but also prone to machine accidents. Therefore chopper speed and doffer speed must be matched.