Method for operating a crimping apparatus, and crimping apparatus
Techniques are directed to operating a crimping apparatus, and to a crimping apparatus for crimping a fibre strand having at least two driven rollers and a stuffer box. A nip is formed between the rollers and is sealed off at the end faces of the rollers by press plates. The press plates at the start of the process are temporarily actively pressed against the end faces of the rollers by press actuators, and, once a contact position has been reached, are held in place by generation of a clamping force by clamping actuators. Each press plate, in addition to a press actuator, is thus also associated with a clamping actuator for clamping of the press plate, the press actuators and clamping actuators being controllable by at least one control unit.
1 . A method for operating a crimping device having two driven rollers by way of which a fibre strand is conveyed through a roller gap into a stuffer box and in which the roller gap at end sides of the rollers is sealed by a first compression plate and a second compression plate,
wherein
the first compression plate and the second compression plate at the start of a process are, for a time, actively pressed onto the end sides of the rollers and upon reaching a bearing position are in each case held by a radially acting clamping force, wherein
a compression actuator and a clamping actuator act on a supporting piston which bears on an end side of one of the compression plates.
2 . The method according to claim 1 ,
wherein
each of the compression plates by way of the radially acting clamping force is clamped in such a manner that a respective compression plate remains in the bearing position when the crimping device is in operation.
3 . The method according to claim 1 ,
wherein
each of the compression plates is in each case connected to a respective rotary drive and in the bearing position carries out a superimposed rotation relative to a respective end side of the rollers.
4 . The method according to claim 1 ,
wherein
the first compression plate by way of a pneumatically generated compression force is pressed axially onto first end sides of the rollers and the second compression plate by way of a pneumatically generated compression force is pressed axially onto second end sides of the rollers.
5 . The method according to claim 1 ,
wherein
each of the compression plates is clamped radially in the bearing position and the clamping force is generated hydraulically.
6 . A crimping device for crimping a fibre strand, having at least two driven rollers which therebetween form a roller gap, having a stuffer box that is assigned to the roller gap, and having a first compression plate and a second compression plate which for sealing the roller gap bear on end sides of the rollers, the first compression plate and the second compression plate both having a respective compression actuator for pressing on the compression plates,
wherein
the first compression plate and the second compression plate both additionally have a respective clamping actuator for clamping the compression plates, and in that at least one control apparatus for controlling both the compression actuators and the clamping actuators is provided,
the at least one control apparatus is configured so that the compression plates at the start of a process are briefly actively pressed onto the end sides of the rollers and upon reaching a bearing position are in each case held by a radially acting clamping force, and
one of the compression actuators is configured to act axially and one of the clamping actuators is configured to act radially on a respectively assigned supporting piston which bears on one of the compression plates.
7 . The crimping device according to claim 6 ,
wherein
the compression plates are capable of being pressed to their respective bearing position at the end sides of the rollers by, for a time, activating the compression actuators.
8 . The crimping device according to claim 7 ,
wherein
the compression plates while the crimping device is in operation are capable of being held in the bearing positions by activating the clamping actuators.
9 . The crimping device according to claim 6 ,
wherein
each of the compression plates is in each case additionally assigned one rotary drive, said rotary drives being connected to the at least one control apparatus.
10 . The crimping device according to claim 7 ,
wherein
supporting pistons have in each case one rotatable shaft portion, said shaft portions being connected in a rotationally fixed manner to the compression plates and being coupled to the rotary drives.
11 . The crimping device according to claim 10 ,
wherein
the compression actuators are connected to a compressed-air supply, and the clamping actuators are connected to a hydraulics supply.
12 . The crimping device according to claim 11 ,
wherein
the compression actuators and the clamping actuators are configured so as to be integrated in one housing.
13 . A crimping device for crimping a fibre strand, having at least two driven rollers which therebetween form a roller gap, having a stuffer box that is assigned to the roller gap, and having a first compression plate and a second compression plate which for sealing the roller gap bear on end sides of the rollers, the first compression plate and the second compression plate both having a respective compression actuator for pressing on the compression plates,
wherein
the first compression plate and the second compression plate both additionally have a respective clamping actuator for clamping the compression plates, and in that at least one control apparatus for controlling both the compression actuators and the clamping actuators is provided, and
one of the compression actuators is configured to act axially and one of the clamping actuators is configured to act radially on a respectively assigned supporting piston which bears on one of the compression plates.