Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a forming machine for warp and weft superimposed non-woven composite fabric, comprising a machine frame (1), a warp frame (2), a warp delivery apparatus (3), a rotating-type weft-laying apparatus (4), a sizing apparatus (5), a drying apparatus (6), and a rolling apparatus (7), wherein the weft-laying apparatus (4) comprises a rotating shaft (8), a weft bobbin mounting plate (9) and a yarn insertion tube mounting plate (10) mounted on the rotating shaft (8), and two weft selvage threads (11) respectively provided axially on the two sides of the rotating shaft (8). Weft bobbins (9-1) are mounted on the weft bobbin mounting plate (9), yarn insertion tubes (10-1) are mounted on the yarn insertion tube mounting plate (10), and the weft selvage threads (11) are located on the inside of yarn output ends of the yarn insertion tubes (10-1). The rotation of the rotating shaft (8) is driven by a drive mechanism, and the weft selvage threads (11) move in the transverse direction of the machine frame (1). When the rotating shaft (8) rotates, the weft (9-1-1) is laid between the two weft selvage threads (11) to form a weft layer (9-2). A warp layer (2-2) and the weft layer (9-2) are superimposed and pass successively through the sizing apparatus (5) for sizing and the drying apparatus (6) for drying, to then be rolled by the rolling apparatus (7) into rolled fabric. The forming machine has a high weft-laying speed, can prepare composite fabric of three or four layers superimposed together, has a simple structure, has a high yarn utilization rate, and occupies little floor space.
A: A grinding device, comprising a rack (1), rotating mechanism sets (3), fixing assemblies (7), and tool bases (9). Two mounting bases (2) are arranged on the rack (1), and each of the plurality of rotating mechanism sets (3) comprises a first rotating mechanism (4) and a second rotating mechanism (5); the first rotating mechanism (4) and the second rotating mechanism (5) are correspondingly and fixedly installed on the two mounting bases (2), and the first rotating mechanism (4) and the second rotating mechanism (5) are driven by driving mechanisms (6) to rotate; each fixing assembly (7) is fixedly mounted on one of the first rotating mechanism (4) and the second rotating mechanism (5), is driven by one of the first rotating mechanism (4) and the second rotating mechanism (5) to rotate, and is mounted with a grinding piece (8); and each tool base (9) is fixedly mounted on the other one of the first rotating mechanism (4) and the second rotating mechanism (5) and is driven by the other one of the first rotating mechanism (4) and the second rotating mechanism (5) to rotate, and a grinding part (10) for grinding the corresponding grinding piece (8) is provided on each tool base (9). The grinding device can simultaneously grind a plurality of grinding pieces, and has the advantages of high production efficiency and good interchangeability of the grinding pieces.
B: Disclosed is a coaxiality detection apparatus used for quickly clamping a product and positioning and detecting coaxiality of the product, and comprising a rotary shaft (1), a positioning apparatus (2), a rotating apparatus (3), a machine frame (4), a cylinder shaft (5), a clamping mechanism (6) used for clamping the cylinder shaft, a product clamping apparatus (7), a clamping sleeve (8), measuring seats (9), and dial indicators (10), wherein a sheathing apparatus (33) on the machine frame (4) is sheathed on the rotary shaft (1) and fixed to the rotary shaft (1) via the positioning apparatus (2); the cylinder shaft (5) is embedded in a hollow cavity (20) of the rotary shaft (1), and passes through the clamping mechanism (6); the product clamping apparatus (7) is also mounted in the hollow cavity (20) of the rotary shaft (1), connected to the cylinder shaft (5), and closely gripped at an open groove (41) of the shaft (5); the clamping sleeve (8) is mounted on an outer surface of a flange of the rotary shaft (1) and clamped with the product clamping apparatus (7); and the two dial indicators (10) on the two measuring seats (9) are respectively perpendicular to and coaxial with a reference centre of the rotary shaft (1). The coaxiality detection apparatus can achieve fast clamping, fast detection and accurate positioning, improving working efficiency.
C: Adhesive-free artificial turf comprises a base fabric (1) and grass tufts (2) woven thereon. Each of the grass tufts (2) comprises 2-16 turf fibers. The base fabric (1) comprises warp yarns (11) and weft yarns (10). The warp yarns (11) comprise first warp yarns and second warp yarns separated by a space therebetween. The first warp yarns comprise 1-6 first warp lines (110), and the second warp yarns comprise 4-7 second warp lines (111). Middle portions of the grass tufts (2) are woven and interlaced with the 1-4 weft yarns (10) along an extension direction of the warp yarns (11), and two ends of the grass tufts (2) respectively extend out of the base fabric (1) on the same side. Any two adjacent grass tufts (2) in a row of grass tufts (2) extending along an extension direction of the weft yarns (10) on the base fabric (1) are separated by a space having a width of 3-5 warp yarns (11). Any two adjacent grass tufts (2) in a column of grass tufts (2) extending along the extension direction of the warp yarns (11) on the base fabric (1) are separated by a space having a width of 4-7 weft yarns (10). A space between any two adjacent rows of grass tufts on the base fabric (1) has a width of 1-2 weft yarns (10). The adhesive-free artificial turf has advantages of favorable breathability and drainage, and strong adhesiveness.
D: Disclosed is a cylindrical combination machine, comprising: a rack (1), wherein a woollen material loading stage (2) is arranged at a front end of the rack (1); an upper traction sizing press roll (3) and a lower traction sizing press roll (4) fitting with the upper traction sizing press roll (3) are arranged on the rack (1) at a rear end of the woollen material loading stage (2); a vertical adjusting device (5) connected to the upper traction sizing press roll (3) is arranged on the rack (1) at an upper end of the upper traction sizing press roll (3); a front sizing device (6) fitting with the upper traction sizing press roll (3) is arranged on the rack (1) at a front end of the upper traction sizing press roll (3); a rear sizing device (7) fitting with the lower traction sizing press roll (4) is arranged on the rack (1) at a rear end of the lower traction sizing press roll (4); a cylinder (9) is arranged obliquely upwards at a rear end of the rack (1) by means of a support (8); a tapered feeding channel (10) is arranged in the cylinder (9); and a tapered clamping rod (11) is arranged at an upper end of the tapered feeding channel (10) in a penetrating manner.
Answer: D