5results about How to "Consistent shape and size" patented technology

The invention relates to the technical field of high-performance composite materials, and provides a frequency band magnetic control adjustable one-dimensional nanotube composite wave-absorbing material and a preparation method thereof.The material is composed of a one-dimensional tubular ferroferric oxide matrix and manganous-manganic oxide wrapping the outer side of the matrix, and directional arrangement is conducted through magnetic control rotation. The preparation method comprises the following steps: preparing an iron oxyhydroxide precursor through a hydrothermal synthesis method; the preparation method comprises the following steps: reducing an iron oxyhydroxide precursor by a liquid-phase pyrolysis method, and coating a manganous-manganic oxide shell layer in situ at the same time, so as to obtain a nanotube ferroferric oxide / manganous-manganic oxide composite material; and carrying out orientation arrangement on the nanotube-shaped ferroferric oxide / manganous-manganic oxide composite material through magnetic field control. According to the preparation method and the structural design, the yield, the uniformity, the magnetic performance, the electromagnetic wave absorption efficiency, the multi-band electromagnetic loss enhancement and the like of the material are remarkably improved.

This utility model discloses a glue-free self-locking handle packaging box, including a box body and a box bottom. The box bottom is located at one end of the box body and also includes a first cover, a second cover, a first locking plate, and a second locking plate. The first cover, second cover, first locking plate, and second locking plate are distributed around the perimeter of the box body. A first handle is attached to the first cover, and a second handle is attached to the second cover. A first locking opening is provided on the first cover, and a second locking opening is provided on the second cover. When the box is sealed, the first cover and the second cover are in the same plane, and the first handle and the second handle are parallel, close together, and tightly fitted. This packaging box has the following advantages: after sealing, the force is borne by the first and second locking plates. Compared to point contact, surface contact has a larger force-bearing surface, preventing the box from stretching and cracking, and making it less prone to tearing.

The utility model discloses hinge parts, including first pressure plate, with the side pin shaft that connects with first pressure plate to the swing arm, second pressure plate and first elastic piece that set up in turn in side pin shaft and along side pin shaft slidably, swing arm is rotatable relative to second pressure plate, and the boss and the crater that cooperate with boss are equipped on second pressure plate and swing arm respectively, and the shape of first pressure plate and second pressure plate is consistent. The utility model discloses novel structure, and the shape of first pressure plate and second pressure plate is consistent, reduces the spare parts category, does not need to deliberately distinguish first pressure plate and second pressure plate in the assembly process, can effectively improve the assembly efficiency of hinge parts, reduces the assembly and production cost of hinge parts.