6results about How to "Difficult to process" patented technology

The invention relates to the field of matt films, in particular to a scratch-resistant BOPP (biaxially-oriented polypropylene) matt film and a preparation method thereof. The scratch-resistant BOPP matt film comprises an upper surface matt layer, a middle core layer and a lower surface layer which are sequentially arranged, the upper surface matting layer comprises a matting master batch; the matting master batch comprises 28 to 50 weight percent of co-polypropylene, 8 to 14 weight percent of ethylene-octylene block copolymer, 6 to 10 weight percent of micro-crosslinked polypropylene and 30 to 50 weight percent of high-density polyethylene; the ethylene-octylene segmented copolymer comprises a hard segment with low octylene content and high crystallinity, and an amorphous soft segment with high octylene content; the middle core layer comprises homo-polypropylene; the lower surface layer comprises a smooth surface layer or an extinction layer. By utilizing the synergistic effect of the ethylene-octylene block copolymer and the micro-crosslinked polypropylene, the compressive deformation performance, the impact strength, the tensile strength and the yield strength of the co-polypropylene are improved, the indentation of a film surface in a scraping pressure applying stage and the scratches and damages generated in a sliding stage are reduced, the scratch resistance of the upper surface matting layer is improved, and the matting effect is ensured.

The invention provides a forming method of a combined profile structure. The forming method comprises the following steps that S1, primary rolling is conducted, specifically, a primary roller press gradually changes the section of a material belt into a circular tube shape through a pre-pressing roller and a plurality of sets of forming rollers; s2, external welding, wherein the two aligned side edges of the material belt are welded through a welding machine; s3, secondary rolling is conducted, specifically, a secondary rolling machine gradually rolls the section shape of the material belt from a circular tube shape to a flat square tube shape through a plurality of sets of shaping rollers and shape righting rollers; s5, cutting off: cutting off the material belt according to a preset length through a cutting machine; s6, laser welding is conducted, specifically, at least two strip-shaped reinforcing ribs are inserted into an inner hole of the cut-off material strip, the reinforcing ribs are arranged in parallel to the axial direction of the material strip, and the multiple reinforcing ribs are inserted into the flat square tubular structure at intervals in the left-right direction; and then the upper ends and the lower ends of the reinforcing ribs are welded to the upper side wall and the lower side wall of the flat square tubular structure correspondingly through a laser welding machine. The invention further provides a combined profile structure.

The invention discloses an integer slot concentrated full-pitch flat wire winding structure and a flat wire motor, and relates to the technical field of motors. Each branch of each phase of the integral-slot concentrated whole-pitch flat wire winding structure comprises one or more coil units, each coil unit is composed of four coil groups, each of the first coil group and the third coil group comprises a same-layer hairpin, the second coil group comprises N / 2-1 cross-layer hairpins, and each cross-layer hairpin comprises N / 2-1 cross-layer hairpins. The two effective conductors of the cross-layer hairpin are located on the adjacent layers of flat wires in different grooves, the fourth coil assembly is obtained by rotating the second coil assembly by m stator grooves in the circumferential direction, and m is the phase number of the winding motor. According to the invention, the stator adopts an integral pitch winding and is matched with a concentrated winding scheme that the number of slots per pole per phase is 1, so that the motor can obtain the maximum winding coefficient; only N / 2 + 1 types of hairpins are needed, and the types of the hairpins are reduced, so that the purposes of reducing the processing difficulty, the assembly complexity, the manufacturing cost and the maintenance difficulty of the flat wire winding are achieved.

The application discloses an embedded voltage-stabilized heat-dissipation PCB structure with a thermoelectricity synergic regulation layer and a preparation method thereof. The structure comprises at least one PCB inner layer and a chip power supply pad arranged on the inner layer, and a ring-shaped or C-shaped thermoelectric material pattern (ZT>0.5 at room temperature) is embedded in a region corresponding to the chip power supply pad directly below the inner layer. A first end of the thermoelectric material pattern is electrically connected to a power supply layer, and a second end is electrically connected to a grounding layer or a heat-dissipation through hole. The application utilizes the temperature difference during the operation of a chip to drive the thermoelectric material to generate a reverse electromotive force to inhibit power supply ripple, and simultaneously utilizes the Peltier effect to actively pump heat, so that the inner layer is integrated with voltage stabilization and heat dissipation. The power supply ripple can be reduced by 25% to 42% and the surface temperature of the chip can be reduced by 11 DEG C to 14 DEG C by using the PCB structure. The application directly integrates the thermoelectric function in the PCB inner layer, does not occupy the surface layer area, and is suitable for the packaging substrate of high-performance computing chips.

The utility model provides a compression assembly, refrigeration equipment and vehicle, compression assembly includes shell, orbiting scroll and static scroll, orbiting scroll is provided in the shell, orbiting scroll includes first disc body and first tooth, first tooth extends in spiral shape and is provided on the first disc body; the static vortex plate is arranged in the shell and comprises a second plate body and second teeth, the second teeth extend spirally and are arranged on the second plate body, and air suction cavities are formed between the second teeth and the first teeth; the orbiting scroll rotates for a circle relative to the static scroll, and the suction volume of the suction cavity is V; the inner diameter D of the shell, the diameter D1 of the first disc body, the diameter D2 of the second disc body and the volume V meet the following relation that (D * V) * D2 / D1 is larger than or equal to 7313 and smaller than or equal to 9577. By optimizing the inner diameter of the shell, the diameter of the disc body and the air suction volume of the air suction cavity, under the condition that the performance and reliability of the compressor are guaranteed, the diameter of the shell is reduced as much as possible, the displacement of the compressor is increased, and the miniaturization and large-displacement design of the compressor is achieved.

The utility model discloses a double-layer thermal shrinkage film for packaging multi-connected bottles and cans, which comprises an inner thermal shrinkage film, a plurality of bottles and cans form a bottle and can group, two ends of the inner thermal shrinkage film are provided with first holes for the bottle and can group to enter, the inner thermal shrinkage film after being heated and shrunk wraps the bottle and can group, and the first holes are positioned on two sides of the bottle and can group; the two ends of the outer thermal shrinkage film are provided with second holes allowing the bottle and can set to enter, the outer thermal shrinkage film shrunk after being heated wraps the bottle and can set and the inner thermal shrinkage film together, and the second holes are located in the two sides of the bottle and can set; wherein the first hole is covered by the outer thermal shrinkage film, the opening direction of the first hole is perpendicular to the opening direction of the second hole, and the second hole is located at the two ends of the bottle and can set in the length direction. The inner thermal shrinkage film and the outer thermal shrinkage film are wrapped in a vertically staggered mode, inherent holes of the thermal shrinkage films are completely covered, dirt and dust are effectively prevented, the packaging sealing performance and the overall strength are improved, and grabbing and carrying are facilitated.