Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed a prepreg sizing roll shaft spraying complete machine. The complete machine comprises a main machine base (b1) and a coating mechanism arranged on the main machine base (b1); the complete machine further comprises a feeding structure for performing feeding and an iron powder supply device for absorbing iron powder; a supporting rod (b2) for the installation of the feeding structure is arranged on the main machine base (b1); and the complete machine also comprises an iron powder recycling box (b3) arranged below the iron powder supply device. The prepreg sizing roll shaft spraying complete machine uses automatic control, a very efficient novel roller shaft manufacturing manner is achieved, the finished product yield is high, and the effect is good.
A: An edge sewing machine, comprising a machine base (1) and a machine head (2) arranged on the machine base (1). A machine needle assembly (3) and a machine needle driving mechanism for driving the machine needle assembly (3) to act are arranged on the machine head (2); a swing arm (4) and a swing arm driving mechanism for driving the swing arm (4) to swing are arranged on the machine base (1); a thread hooking device (5) obliquely extending upwards to a position right below the machine needle assembly (3) is arranged on the swing arm (4); a sensing probe (6) configured to sense the outer contours of shoe soles of different sizes so as to control the swing arm (4) to swing along with a topline is further comprised; a limiting controller (7) for limiting the swing angle of the swing arm (4) is arranged on the machine base (1). The edge sewing machine is simple in structure, easy in operation, capable of automatic arm swinging, and high in production efficiency.
B: A semi-automatic production device for traceless hooks, comprising a rack. A conveyor assembly used for conveying materials, a tray set (1000) used for bearing traceless hook fixing pieces (120) and hooks (130), a gluing system used for smearing glue on the traceless hook fixing pieces (120), a sticky film feeding mechanism used for feeding sticky films (110) to the traceless hook fixing pieces (120) smeared with the glue, and a glue pressing and curing device used for curing and bonding the traceless hook fixing pieces (120) and the sticky films (110) with the glue are arranged on the rack. According to the device, a worker only needs to place the traceless hook fixing pieces (120) and the hooks (130) on trays, the traceless hooks can be manufactured by means of a control switch, the labor cost is reduced, and moreover, due to the fact that the traceless hooks are produced in a semi-automatic mode, the finished product yield is high, the condition is good, workers do not need to make direct contact with UV glue and ultraviolet light, the safety of the workers is guaranteed, a plurality of trays can be arranged on a tray set, and the production efficiency is greatly improved.
C: Disclosed is a direct-current, double-support and ultra-fine ring roller grinder, comprising a grinding host, wherein a host shell (1) of the grinding host is arranged on a host base (3); a grinding roller (9) and grinding rings (12, 13) mated with each other are arranged in the host shell (1); the grinding roller is arranged on a grinding roller support (10, 11), and the grinding roller support is arranged on a main shaft (2); a lower end of the main shaft (2) is mounted in a double-support manner through upper and lower bearing positions (4,7) on an upper host cover (6) and the host base (3); a negative-pressure gas port (5) is formed on the host base (3); the grinding rings are directly mounted and connected to the host shell in a non-spaced manner; and the gas port communicates with a graded conveying pipe outside the grinding host. The grinding host of the ring roller grinder uses a structure with feeding from the top and suction from the bottom, which is not restricted by the grading amount of the grading device, and prevents the discharging materials from leaking outside; thus, the grinding efficiency is improved, mechanical collision and abrasion between the grinding roller and the grinding ring are reduced, and the grinding host has a low noise level.
D: An automatic spraying device for insulated cups, comprising a mounting frame (1), a drive rod (2) is provided on the mounting frame (1); a torque motor (3), a lower rotary disc (4) and an upper rotary disc (5) are mounted on the drive rod (2); the upper rotary disc (5) is provided with a plurality of moving devices (6), and a sealing cover (7) and a negative pressure device (8) is connected on each moving device (6); the lower rotary disc (4) is provided with paint bases (9), and a storage cavity (10), a support rod (11) and a flow cavity (12) are provided within each paint base (9); a plurality of outflow holes (13) are provided on the flow cavities (12); a fixed ring plate (14) is provided on the paint bases (9), and a plurality of discharge holes (15) are provided between each fixed ring plate (14) and support rod (11); and one side of the lower rotary disc (4) is provided with a feeding device (16) and a discharging device (17). The device has a simple structure, a good coating effect, and can improve spraying working efficiency.
Answer: D