T extile Machinery Exhibits at 1969 Tokyo International Trade F air April 17-May 6, 1969 Latest products from Japan and 22 other countries were on show at the Tokyo International Trade Fair'69 held at Harumi, Tokyo. One would have expected displays of numerous new textile machines designed to help the textile industry to cope with the labor shortage and rising cost. Actually, new textile machines on display were very limited in number and variety. Exhibits & Exhibitors Conversion of Fibers into Finished Yarns (Spinning Machinery) (1) High-speed Comber, Model MFC-4 Mitsubishi Heavy Industries, Ltd., Hirosh ima (2) Super Drafter, Model PD III 3 Okuma Machinery Works, Ltd., Nagoya (Texturing Machines) (3) Fuji-Loft FL-84 Fuji Light Machinery Co., Ltd., Fuji- Yoshida (4) ST-6 Type False Twister Mitsubishi Heavy Industries, Ltd., Hiroshima II. Conversion of Yarns into Fabrics (Knitting Machines) (1) Full-Automatic Flat Knitting Machine Type MJF-183 Mitsuboshi Seisakusho Ltd., Tokyo (2) Automatic Flat Knitting Machine Type MA-7 ....... Mitsuboshi Seisakusho Ltd., Tokyo III. Dyeing and Finishing (1) Splashed Pattern Dyeing Machine ......................... Sawamura Kagaku Kikai Kogyo Co., Ltd., Yokohama (2) V2 Washer Hirano Kinzoku Co., Ltd., Osaka IV. Manufacture and Maintenance of Textiles for End Uses (Sewing Machines) (1) High-speed, single-needle lock stitch sewing machine with automatic thread cutter, Model DD-L 555-2 ...., Tokyo Juki Industrial Co., Ltd., Tokyo. (2) High-speed, single-needle lock stitch sweing machine with automatic thread cutter, Model DB-2-B755-100 ., Brother Industries, Ltd., Nagoya (3) Super high-speed two-needle sewing machine DV-1200 Yamato Sewing Machine Mfg. Co., Ltd., Toyonaka-shi, Osaka. (4) Ultra-sonic Welding Button Holder JUS-1 Tokyo Juki Industrial Co., Ltd., Tokyo. (5) Single-needle, lock stitch bar-tacking machine, Model LK3-B827 Brother Industries, Ltd., Nagoya V. Testing and Measurment (1) Cycle Changer and High-cycle Induction Motor Kosoku Electric Co., Ltd., Tokyo (2) Automatic Recording Titrator Hirama Rika Kenkujo, Ltd., Kawasaki-shi. Vol. 15, No. 4 (1969) 141 I. Conversion of Fibers into Finished Yarns (Spinning Machinery) Further progress of the Japanese spinning industry, which has reached a high level of fiber-processing tech- nique, depends upon the developments of new spinning methods and improvements in the existing ones with a view to high speed and automation of processes. It was disappointing, therefore, to find only two machines on view. They were, however, designed exactly for high speed, labor-saving, high efficiency and easy operation. (1) High-Speed Camber, Model MFC-4 (Mitsubishi Heavy Industries, Ltd., Hiroshima) Fig. 2 Driving mechanism of detaching roller This machine basically resembles previous models, MFC-1 and MFC-3. Its features include a special device 3. A new type of cleaner is used. It is driven by the to overcome the problems arising from high-speed ope- relative motions of the nip and top comb. It has cleaning ration (see Fig. 1). This machine is capable of speeds up- plates on both sides of the top comb to clean it. to 185 nips/min and can take worsted, jute and synthetic 4. Time table (Fig. 3) fibers. A disk table on the cam shaft indicates clearly the timing of the adjustments of various parts: top comb feed, space gauge, circular brush, cylinder comb, and doffer gauge. Fig. 1 High-Speed Comber, Model MFC-1 Main specifications : Working width, 490mm; Number of nips, 185 nips/min; Adjustable range of space gauge, Fig. 3 Time table 20-30mm; Amount of feeding, 300g/min (standard); Sliver delivery speed, about 12m/min for delivery of 20g (2) Super Drafter, Model PDIII 2 CW and Can Changer /min); Output, 15kg/hr or more of merino wool or 17kg/hr (Okuma Machinery Works, Ltd., Nagoya) or more of mixed breed; Floor space needed, ball creel This drafter is a 6-delivery, high-speed intersecting gill, (8 balls x 3 stairs),..about 1.9 ii x about 3.9m, cans creel designed to take long staple fibers, wool and synthetic (cans dia. 4060 x 12W)...about 1.9m x about 3.4m, lap (see Fig. 4). Its 72 fallers, intended as a last unit of the creel (3-lap horizontal arrangement).. about 1.9m x about gilling process in prespinning, can process slivers as fine as 3.8m, and weight, about 2,000kg. 1.0 - 3.0 g/m. The drafter is capable of draft 5 - 12 times 1. The driving mechanism of the detaching roller is higher than the conventional draft. Its special false a unique one having planetary gears. With the aid of these twister facilitates sliver-collecting and does away with the gears, the grain of slivers spun can be freely varied during diffiicultly of collecting fine slivers from the front rollers operation. In short, the machine can run at high speed, into the can with the aid of a coiler alone. The false twist- feeds slivers uniformly, and reduces power consumption, ing device differs from the conventional rubbing system, vibrations and noise. is simple in mechanism and needs no maintenance. 2. Coiler unit. This machine can substitute the reducer and open gill Large cans (610 mm in out. dia. x 914 in height) can be and, therefore, do away with one process. Not only that, used on this unit. It is equipped with an indicator to slivers can be fed to the bobbiner from the can creel, not indicate the grain of spun slivers and facilitate sliver grain from the ball creel. In this case, the total amount of control. doubling is 10,240. With can changers installed on the 142 Journal of The Textile Machinery Society of Japan Fig. 4 Super draftiner, Model PDIII 3CW Fig. 6 Flow diagram of the changer cases and accouts for 80 % of the total production of arti- ficial yarns. The technique in this type of twisting has reached a high stage of development, but poses calling for further study, such as : (1) Reduction of costs through upping productivity, e.q., development of high-speed spindle bearings, a larger package system, an auto doffer and improvement in other Fig. 5 False twister of the super drafter parts of operation. (2) Improvement of quality of products, e.g., improve- entire frame (we shall describe this phase later), manpower ment of twisting mechanism looking to higher heat-setting is saved by 5O0. efficiency, prevention of soiling in the interior of heaters Main specifications: Fed slivers (g/m), 60-130; Spun and higher accuracy in spindle rotations. slivers (g/m x number of slivers), (1-3) x 6; Spinning (3) Development of artificial yarns suited for final pur- speed (m/min), 80-120 (150); Draft, 5-9 (12); Number of poses and development of techniques to turn out market- fallers, 72; Number of faller drops, 1,600 - 2,200 min; able products. Front roller, triple type 70, 25.4/63.5; Nip gauge, 20-60; Probably because yarns twisted by false twisters are Speed meter, attached; Auto counter, attached; Winding the most versatile of all twisted yarns, exhibits of twisting type, bi-coiler type 3-can winding; Can dimension, `4060 x machines at past fairs were practically limited to false 900 - 1,300h; Can dimension, 406, 610, 900, 10000 x twisters. Exhibits of twisters at the recent fair were limited 900 - 1,300h; Automatic stop motions throughout the to false twisters entered by Fuji Light Machinery and drafter; Main motor, 2.2kW 6p. Mitsubishi Heavy Industries. 3-can can changer Engineers are now working to develop new methods, This drafter is equipped with a 3-can can changer (Fig.6). called "Duotwist" and "Auto Twister," in which several When cans become full, the changer stops automatically threads will be twisted together and heated in the heating by means of a signal from the auto-counter and 3 full unit, so that the twist will be set and the yarn drawn out cans move forward. After slivers are cut from under the without the revolution of the spindle. It is expected the coiler, spare empty cans go to pre-determined places under new methods will make their debut at the next fair. the coiler. New cans are sent in the direction of the arrow (3) Fuji-Loft FL-84 (Fuji Light Machinery Co., Ltd., to serve as spare cans. The length of time for which the Fujiyoshida) machine stops for all this can-changing is only about 25 This machine, which the makers call "electronic twister," seconds. (By Jiro Shimizu, Tokyo Institute of Technologh) has four transistors and two SCRs per spindle for auto- (Texturing Machines) matic control of temperature, etc. to insure stable direct Artificial yarns are now produced by nearly 10 different twisting. It excels in fine-yarn processing and can twist, methods, including false-twisting, push-in, chafing, etc. for instance, 20-d nylon yarn at the amazing speed of 500 False-twisting is employed in an overwhelming majority of meters per minute (equivalent to a twisting speed of 3,200,000 rpm). This machine is an improvement on the An oil-feeding pot is kept in the spindle case to lengthen model shown at the 1967 Tokyo International Trade Fair. the oiling cycle. With the overdrive of the spindle and the The major points of the improvement: increase in heater capacity, the delivery speed can be raised The motor power has been increased from 120 W to 140 to 120 meters per minute. An improvement has been made W to give a take-up speed of 500 m/min. The reeling unit in the shape of traverse cam so that the increased traverse is now equipped with a touch roller to prevent ribbon speed and the high-speed winding can be matched.