With the advancement of science and technology in China, the textile industry is transforming from a labor-intensive industry to a technology-intensive industry. Economic development will inevitably lead to an increase in human capital. Therefore, China's textile enterprises are developing in the direction of increasing the degree of automation of single machines and reducing the number of workers for 10,000 spindles. For the roving frame, changing the roving doffing mode and transportation mode is an important way to increase the degree of automation of the roving frame and increase labor productivity.
1, semi-automatic roving method:
After the suspension roving machine entered the Chinese market in the 1980s and the FA series suspension roving machine was developed in China, the roving doffing method has evolved from the traditional doffing doffing to the simple doffing doffing method. It is a semi-automatic roving method. As the wing used by the suspension roving frame is divided into an upper spindle suspension wing and a lower spindle suspension wing, the suspension roving frame is divided into an upper spindle suspension roving frame and a lower spindle suspension roving frame. Due to the different types of spindles, the method of falling roving is also different, which will be introduced separately below.
The semi-automatic doffing method of the upper spindle type roving frame is: when the roving is spun to a set length and the lower rib is raised from the reversing position to the predetermined position, the roving frame automatically stops, and then the lower rib automatically descends to the doffing position. Take out the full bobbin by the operator. After the full bobbin is taken out, the operator presses the long rib up button. When the long rib is raised to the intubation position, the operator inserts the empty bobbin. After the empty bobbin is inserted, the operator presses the long rib up button to make the lower bar Raise to the raw head position, the operator will restart the machine for a new round of spinning.
The semi-automatic doffing method of the lower spindle type roving frame is as follows: when the roving is spun to a set length, the roving frame will stop automatically, and the lower rib will be tilted to tilt the lower rib to 45 ° so that the operator can take the full bobbin. After the full yarn tube is taken out, the operator inserts the empty tube, and then the lower rib is reversed to restore the normal spinning position. After entering the head position, the operator head restarts the machine for a new round of spinning.
At present, the doffing method of domestic hanging spindle roving frames is the semi-automatic doffing method of the upper spindle, which is widely used in textile enterprises.
2, Automatic roving fall:
With the continuous development of computer technology, computer technology is widely used in textile equipment. In order to increase the degree of automation of the single machine and reduce the number of workers in the 10,000 spindles of the textile enterprises, the international advanced roving machine manufacturers have introduced automatic doffing roving machines in the 1990s. The automatic doffing roving machine is based on the suspended roving frame and is equipped with an automatic doffing device for roving. It reduces the labor intensity of operators and improves production efficiency.
The automatic doffing roving machines produced by roving frame manufacturers in Europe and the United States are all lower spindle roving machines. The methods of automatic doffing are different. The representative products are the German zeuze company 670 automatic doffing roving machine, and Marzori, Italy. The company's FT1 automatic doffing roving machine is an automatic doffing roving machine produced by the Spanish company Fleetro-Jet. The following describes their doffing methods.
The automatic doffing method of the 670 type automatic doffing roving frame of the German Zeize Company is: when the roving is spun to a set length and the wing is oriented, the roving frame will stop automatically, the halong will automatically drop, and the roving will be pulled and separated. The track inside the car is automatically docked. The hanging spindle mouth and the empty bobbin are driven by the drag chain and enter the car to align the hanging spindle mouth with the full yarn bobbin. At this time, the hanging spindle mouth and the empty bobbin are arranged next to each other on the towline. The lower rib is raised, so that the hanging spindle mouth is filled with the bobbin. Then, the lower rib is lowered to a certain position, and the drag chain is moved by half a spindle distance to align the empty bobbin with the bobbin shaft. The bobbin is placed on the bobbin shaft, the lower rib is lowered to the spinning position, and the towline runs with the full bobbin to the car, and the track is reset. The roving frame automatically spins and enters a new round of spinning.
This type of structure is characterized by compact structure, simple and elegant appearance.
The automatic doffing method of FT1 type automatic doffing roving machine of Italian Marzori company is: when the roving is spun to a set length, the roving machine will stop automatically, the halong will automatically drop, and the roving will be broken. Then, the lower rib is moved forward to the front of the machine, the lifting platform is lowered with the empty bobbin and the hanging spindle, the hanging nozzle and the empty bobbin are arranged next to each other, and the hanging nozzle and the full bobbin are centered to facilitate the filling Cones. After the full package of yarn is taken, the lifting platform rises to a certain position. After the empty bobbin is moved by half a spindle distance, the empty bobbin is aligned with the bobbin shaft. Then, the lifting platform is lowered a second time and the empty bobbin is placed on the bobbin. On the bobbin, the lifting platform rises to the working position, the lower rib moves back to the working position in the car, the dragon rib rises to the spinning position, and the roving frame automatically spins up, entering a new round of spinning.
Because the lifting platform is in front of the car, the area of the machine is increased, and the structure is not simple enough.
The automatic doffing method of the automatic doffing roving machine produced by Spain's Electro-Jet company is: when the roving is spun to a set length, the roving machine will stop automatically, the lower rib will automatically over-lower, and the roving will be broken. Then Halong Jin moves backward to the back of the machine, and there is a track drag chain above and behind the machine. The towline carries a hanging spindle mouth and an empty bobbin. After centering the spindle mouth and the full bobbin yarn, the lower bar tends to move upward to take the full bobbin. Then, the lower bar is lowered to a certain position. Then, the drag chain moves half a spindle distance to align the empty bobbin. The bobbin shaft, the lower rib is raised, the empty bobbin is placed on the bobbin shaft, the lower rib is lowered and moved forward to the working position in the car, the lower rib is raised to the spinning position, and the roving machine automatically generates a head. A new round of spinning.
The hanging roving frames produced by domestic and Japanese roving frame manufacturers are all spindle-type roving frames. Tianjin Hongda Textile Machinery Co., Ltd. successfully developed the JWF1418 automatic doffing roving machine with independent intellectual property rights in 2002. This machine was successfully exhibited at the Beijing International Textile Machinery Exhibition in 2002. Its automatic doffing method is: After the roving machine is spun to a set length, the roving machine automatically stops, and the Halong tends to automatically lower and pull the roving for the first time. The manipulator enters the car from the front of the machine, grabs the full bobbin, and the lower rib makes the second automatic over-lowering to release the bobbin gear from the full bobbin. The manipulator returns with a full package of yarn from the car to the front of the car, that is, the manipulator takes out the full package of yarn. The lifting platform descends with an empty bobbin and a hanging bobbin, the hanging bobbin and the empty bobbin are arranged next to each other, and the hanging bobbin and the manipulator are centered on the full bobbin yarn, which is convenient for taking the full bobbin yarn. After taking the full package of yarn, the lifting platform rises to a certain position, and after moving the empty tube by half a spindle distance, the empty tube is aligned with the robot, and then the lifting platform is lowered a second time, and the empty tube is placed on the robot. The lifting platform rises to the working position, the manipulator brings the empty bobbin into the machine from the front of the machine, and the lower ribs rise to place the empty bobbin on the bobbin gear. The manipulator retracts from the machine back to the machine, and the lower ribs rise to the At the head position, the roving frame automatically starts to enter a new round of spinning.
JWF1418 automatic doffing roving machine fills the blank of automatic doffing of the spindle roving frame and promotes the technological progress of domestic roving frames.
3. Automatic transportation of roving:
In order to solve the problem of roving damage in the storage and transportation of rovings, and to reduce the number of 10,000-spindle workers in textile enterprises, to achieve an unmanned factory, on the basis of automatic doffing, automatic roving transportation was realized, that is, thickness and fineness were linked.
Automatic transport roving is divided into two forms, one is pull-type automatic transport roving, and the other is electric-powered automatic transport roving. The two types of automatic transport roving are introduced below.
Hand-drawn automatic transport of roving is after the doffing of the roving machine, the full bobbin is transferred to the conveying track via the empty full tube exchange device, and then the full bobbin is automatically transported to the track at the roving storage. When the spinning frame needs When changing the roving, the operator pulls a full package of roving from the roving storage (usually 120), sends it to the spinning frame via the track and the conveyor chain, and the spinning stopper replaces the empty full tube. When the replacement is completed, pull the empty tube to the roving tail yarn cleaning device to automatically clear the tail yarn, and then pull it back to the roving machine for the next automatic doffing.
The electric automatic roving transport is the roving machine automatically doffs the yarn through the full tube exchange device to transfer the full package of yarn to the conveyor towline. The conveyor towline is always running, so that the full package will be transported continuously. Before the spinning frame, when the spinning frame needs to change the roving, the spinning frame stopper removes the full bobbin from the moving track, puts it on the spinning frame, and puts the empty roving tube on the bobbin into the moving track. On this, the thickness and fine coupling are realized.
At present, these two types of automatic roving transport methods are used in the scope of international textile enterprises. Relatively speaking, for Chinese textile enterprises, hand-drawn automatic roving transportation is more suitable for Chinese textile enterprises. This is because the hand-drawn automatic roving method is not restricted by the conveyor chain, and the roving can be transported to each spinning frame. The electric automatic roving conveying chain is constantly moving, so its running trajectory is fixed, that is, the spinning frame corresponding to each roving frame is fixed. The domestic roving process of domestic textile enterprises is changing at any time. The roving variety of each roving frame is not static. For example, the roving varieties of 1 # and 2 # roving frames correspond to 1 # ～ 12 # spinning frames. After a period of time, it was changed to 1 # and 8 # roving frames to produce roving varieties corresponding to l # ～ 12 # spinning frames.
4 Conclusion
(1) At present, the doffing methods of domestic hanging roving frames are semi-automatic doffing and are widely used in textile enterprises. However, with the advancement of technology, domestic roving frame manufacturers have developed automatic doffing systems, which will definitely drive Textile enterprises have formed a demand for this aspect. The automatic doffing roving machine is an upgrade product of the semi-automatic doffing roving machine.
(2) Due to the diversification and uneven level of textile enterprises in China, semi-automatic doffing roving machines and automatic doffing roving machines will coexist for a long time. Semi-automatic doffing roving frame is the mainstream model.
(3) The automatic roving device is generally used in conjunction with the automatic doffing roving machine to create conditions for unmanned spinning. It is a future development direction and has certain market requirements. China's textile enterprises can change from labor-intensive to technology-intensive.
