14results about How to "Wide thickness range" patented technology

The present invention discloses a flexible circuit board containing a transparent cover film and a preparation method thereof, comprising a transparent composite PI substrate and a transparent cover film formed on at least one side of the transparent composite PI substrate; the transparent composite PI substrate comprises a first copper foil layer, a first UV-resistant transparent polyimide layer, a first UV-resistant transparent adhesive layer and a second copper foil layer from top to bottom; the transparent cover film comprises a second UV-resistant transparent adhesive layer and a second UV-resistant transparent polyimide layer; the glass transition temperature of the first UV-resistant transparent polyimide layer and the glass transition temperature of the second UV-resistant transparent polyimide layer are both greater than 320°C. The circuit board of the present invention has extremely high transmittance, extremely low haze, resistance to QUV irradiation, high Tg, high deflection, low rebound force, voltage resistance and low CTE.

The utility model discloses spraying and humidifying equipment for corrugated boards, which relates to the technical field of corrugated paper production and comprises a processing box and a water tank fixedly arranged at the bottom end of the processing box through a collecting hopper, and further comprises a conveying unit and a spraying unit which are arranged on the processing box, and vertical strip-shaped through grooves are respectively formed in two opposite side surfaces of the processing box; the conveying unit comprises a rectangular frame plate, a transverse lead screw, a supporting plate, a rotating shaft, a vertical roller, a rotating motor and a transverse roller, and the rectangular frame plate is fixedly arranged on the surface of one side of the treatment box; the spraying unit comprises a conveying pump, a water conveying pipe, a vertical mist spraying plate, a supporting frame plate and a filter plate. According to the corrugated board conveying device, the rotating motor operates to drive one rotating shaft to rotate, one vertical roller rotates actively, the other vertical roller rotates along with the rotating shaft to push a corrugated board to enable the corrugated board to pass through the interior of a processing box, and the corrugated board conveying device can be matched with the corrugated board to be vertically placed, conveyed, sprayed and humidified and is wide in adaptive corrugated board thickness range.

The utility model relates to the field of pressing beam lifting, in particular to a lifting device and an edge grinding machine. The lifting mechanism comprises a bearing frame, a lifting power mechanism and a transmission assembly, the lifting power mechanism and the transmission assembly are installed on the bearing frame, the lifting power mechanism is connected with the transmission assembly, and the transmission assembly is connected with the rotating arm mechanism. The lifting power mechanism drives the transmission assembly so as to drive the rotating arm mechanism to ascend and descend. According to the utility model, the machinable range is expanded under the condition that the original stress is ensured.

This invention discloses a single-tooth electromagnetic bandgap resonant cavity for testing dielectric properties in the thickness direction, belonging to the technical field of dielectric property testing for microwave and millimeter-wave materials. The single-tooth electromagnetic bandgap resonant cavity constructed by this method uses the TE test mode. 10n The electric field direction within the cavity is perpendicular to the material thickness direction, enabling the testing of dielectric properties along the Z-axis. This cavity allows for multi-frequency testing, meeting testing requirements within the 2.5GHz to 110GHz frequency range. With a quality factor greater than 3000, it offers higher testing accuracy when measuring dielectric loss. Compared to a double-tooth electromagnetic bandgap resonant cavity, a single-tooth electromagnetic bandgap resonant cavity is simpler, solving the positioning difficulties caused by the need for strict symmetry in the electromagnetic bandgap structure between the two half-cavities, while also reducing manufacturing costs. Furthermore, one side of the single-tooth electromagnetic bandgap resonant cavity is a smooth metal plate, making sample insertion through the gap more convenient.

The utility model discloses a presser foot driving mechanism which comprises a presser foot lever, a driving source, a connecting rod assembly and a machine head shell. A mounting shaft for positioning a presser foot lever is arranged at a corresponding position of a machine head shell, the mounting shaft forms a lever fulcrum of the presser foot lever, an eccentric shaft part eccentrically arranged on the mounting shaft is arranged at the fulcrum of the mounting shaft, and the presser foot lever is provided with a fulcrum hole matched with the eccentric shaft part. The eccentric shaft part on the mounting shaft can be located at different heights by rotating and adjusting the angle of the mounting shaft, so that the presser foot lever matched with the eccentric shaft part is driven to be located at different heights, that is, the presser foot lever can rotate along with the mounting shaft to adjust the height of the presser foot lever, and therefore the presser foot has a wider height adjusting range relatively; the presser foot driving mechanism is simple in structure, a large height adjusting range of the presser foot can be achieved and increased through simple adjustment of the installation shaft, and compared with an existing presser foot structure, the presser foot driving mechanism can better adapt to a relatively large cloth thickness range.

The utility model discloses a leather surface cleaning device which comprises a lower bottom plate, cleaning frames are fixedly installed on the two sides of the middle of the upper surface of the lower bottom plate, a first-stage rotating shaft is rotatably installed between the two cleaning frames through a bearing, a fixed cleaning rubber roller is fixedly installed on the first-stage rotating shaft, and guide grooves are formed in the outer surfaces of the upper portions of the two cleaning frames. The guide grooves are longitudinal groove bodies, ball screws are rotatably mounted in the two guide grooves through bearings, threaded seats are arranged on the outer surfaces of the two ball screws in a sleeving manner, the threaded seats are in threaded connection with the ball screws, a second-stage rotating shaft is rotatably mounted between the two threaded seats through bearings, and a movable cleaning rubber roller is fixedly mounted on the second-stage rotating shaft; compared with the prior art, the cleaning device can have the actual use effect of double-sided synchronous cleaning, secondary turnover cleaning of leather is not needed, and therefore the cleaning efficiency of the leather cleaning device can be greatly improved, the overall speed of leather processing production is improved, and the leather cleaning device has good practicability.

The invention provides a nuclear-grade zirconium and zirconium alloy plate welding method, a coiled material and a strip, and the nuclear-grade zirconium and zirconium alloy plate welding method comprises the steps that after the first end face of a first plate and the second end face of a second plate are assembled and fixed, argon tungsten-arc welding is conducted; the first plate and the second plate are nuclear-grade zirconium and zirconium alloy plates, and the thickness difference value of the first plate and the second plate is within + / -10%; the welding current of argon tungsten-arc welding, the average thickness of the first plate and the second plate and the welding speed meet the formula # imgabs0 #, wherein I is the welding current; h is the average thickness of the first plate and the second plate; v is the welding speed; p is a constant. According to the nuclear-grade zirconium and zirconium alloy plate welding method, the tungsten electrode argon arc self-fluxing welding technology is adopted, and nuclear and zirconium alloy coiled materials with excellent weld joint quality can be produced by limiting the relation among the welding current, the plate thickness and the welding speed.

The invention belongs to the technical field of fabric spinning, and particularly relates to smooth and soft elastic yarn and a preparation method and application thereof. Skin short fibers of the yarn are one or more of natural fibers and chemical fibers in a blending mode, and the skin short fibers are made into rough yarn through a pre-spinning process. Yarn cores of the yarns are composite yarns of two or more of polyester fibers, modified polyester fibers, polyamide, spandex and polyolefin. The yarn core participates in core-spun production after being reversely twisted, the yarn is soft, the skin core is not prone to slipping when the whole yarn is woven, the yarn is smooth in surface and soft in hand feeling, fibers on the surface of the yarn are spirally arranged, and the yarn has the style similar to a mooring rope. The woven fabric is smooth and clean in cloth cover, soft in touch, comfortable and elastic, not prone to wrinkling when worn, capable of being worn without ironing after being washed, wide in fabric thickness range, suitable for being worn in four seasons of business and life of people, capable of meeting multiple requirements of comfortable body and face of people, and high-grade, comfortable and elastic.

The invention is suitable for the technical field of laser welding, and provides a multiple laser spot welding method which gradually melts a laser spot welding molten pool by sequentially emitting a plurality of laser beams with different pulse waveforms at a welding position. Comprising the following steps: emitting a first pulse laser beam (peak + constant) to melt the surface of a welding base material; when the molten pool is about to be cooled, a second pulse laser beam (slow rising, constant and slow falling) is emitted, and the radiation position is the same as that of the first pulse laser beam, so that the upper-layer welding base metal laser spot welding molten pool is expanded; and according to the second pulse laser beam setting, the Nth pulse laser beam is emitted until the lap joint face is melted, and the heat conduction type laser welding spot (the depth-to-width ratio is smaller than 1) with the maximum lap joint area is formed. Compared with conventional laser single spot welding, the method has the advantages that the area of a lap joint area is increased, the welding quality is improved, and the advantages of small size, good accessibility and the like of single spot welding are reserved. The welding deformation is reduced, the equipment is simplified, the cost is reduced, the flexibility is high, and the application prospect is wide.

The utility model relates to the technical field of heat dissipation silica gel gasket, and disclose a microstructure heat dissipation silica gel gasket, include: lower heat dissipation silica gel pad, upper heat dissipation silica gel pad, heat dissipation microstructure has lower auxiliary heat dissipation microstructure and multiple group upper auxiliary heat dissipation microstructure, lower auxiliary heat dissipation microstructure sets up on lower heat dissipation silica gel pad, and multiple group upper auxiliary heat dissipation microstructure evenly distributes on upper heat dissipation silica gel pad, and lower auxiliary heat dissipation microstructure and multiple group upper auxiliary heat dissipation microstructure form several heat removal channels, and the heat of electronic component emission can be discharged through the heat removal channel formed in heat dissipation microstructure. The heat dissipation hole of lower heat dissipation silica gel pad, the heat removal cavity of upper heat dissipation silica gel pad and heat dissipation hole are communicated and form heat removal channel, and the gap of efficient filling heating and heat dissipation part is punched through the heat path, and the heat dissipation silica gel strip increases the heat conduction contact area, and the heat conduction silicone grease coating reduces the thermal resistance, and the heat removal groove provides additional heat removal path, and multiple structures cooperate and greatly strengthen heat transfer and heat removal efficiency.

This utility model relates to the field of door and window processing technology, and discloses a deburring device for aluminum alloy doors and windows. It includes a processing plate, with a positioning mechanism fixedly connected to its outer wall for support. An implementation mechanism is slidably connected to the top of the processing plate for processing. The implementation mechanism includes a sliding frame, the outer wall of which is fixed to the bottom of the processing plate. A support frame is slidably connected to the top of the sliding frame, and a fixing plate is fixedly connected to the top of the support frame. A motor is fixedly connected to the outer wall of the fixing plate, and a telescopic plate is rotatably connected to the output end of the motor. A tensioning component is provided on the outer wall of the telescopic plate. In this utility model, by cooperating with a clamping plate with a spring column, plates of different thicknesses can be securely clamped, significantly expanding the range of plate thicknesses that the device can process and improving the versatility of the equipment.

The invention provides a partition wall keel and a partition wall. The partition wall keel comprises a middle structure part and side structure parts located on the two sides of the middle structure part correspondingly. Wherein the middle structure part comprises a middle plate body and two inner connecting plates, the two inner connecting plates are connected with the two ends of the middle plate body respectively and face the two opposite sides of the middle plate body respectively, each inner connecting plate is perpendicular to the middle plate body and forms an L-shaped structure with the middle plate body, and the L-shaped structures are arranged to be used for installing a middle wall plate; when the middle wall plate is installed, the end of the middle wall plate abuts against the L-shaped structure and is fixed to the inner connecting plate of the L-shaped structure. The side structure part on each side comprises an outer connecting plate parallel to the inner connecting plate and a connecting structure connecting the inner connecting plate and the outer connecting plate, and the outer connecting plate is arranged to install an outer wall plate on the outer side surface. According to the scheme, the partition wall has the advantages of being good in sound insulation performance, flexible to build, low in building cost and the like.

The invention discloses a device and a method for testing the shear strength of a composite board. The device comprises a base, a fixed mold and a cutting tool, the base is provided with a die cavity and a cutting tool groove, the cutting tool groove is communicated with the die cavity, and the base is further provided with an operation opening communicated with the die cavity. The fixed die is installed in the die cavity through the operation opening, the fixed die is provided with a cutting tool channel communicated with the cutting tool groove, two clamping mechanisms used for clamping the composite board are arranged in the fixed die, and the two clamping mechanisms are arranged on the two sides of the cutting tool channel respectively. The cutting tool is arranged in the cutting tool groove in a sliding mode, and the cutting tool can press the composite board downwards through the cutting tool channel. According to the shear strength testing device and method for the composite board, the stress of the downward pressure is vertically centered, the accuracy of a shear strength experiment is improved, the test method adopts two-side clamping and shearing of the sample, the sample processing requirement is greatly reduced, the operation is simple and convenient, the efficiency is high, observation can be performed during testing, the structure is simple, and the tested thickness range is wide.