58results about How to "Shrink evenly" patented technology

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a high-purity aluminum oxide ceramic substrate and a preparation process thereof. The high-purity aluminum oxide ceramic substrate is prepared from the following raw materials in parts by weight: 0.20 to 0.25 part of magnesium oxide, 0.35 to 0.55 part of zirconium oxide, 1.2 to 1.5 parts of dispersing agent, 60 to 65 parts of ethanol, 99.7 to 99.8 parts of aluminum oxide, 12 to 15 parts of adhesive, 6 to 9 parts of plasticizer and 50 to 55 parts of n-butyl alcohol, the adhesive is a mixture of polyvinyl butyral, water glass and modified paraffin. The prepared high-purity aluminum oxide ceramic substrate has excellent chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has better density, mechanical property and thermal stability by mixing various raw material components, and is not easy to break when subjected to bending load.

The invention discloses a low-gram-weight anti-leakage PE (polyethylene) film. The gram weight of the PE film is 26-28g / m < 2 >; the PE film comprises an upper film layer, a middle film layer and a lower film layer which are sequentially distributed from top to bottom, and the upper film layer, the middle film layer and the lower film layer are all obtained by melting, extruding, stretching and curing PE film mixed materials; the PE film mixture is prepared from the following raw materials in percentage by mass: mLLDPE resin, LLDPE resin, LDPE resin and nanoscale calcium carbonate, and the addition amount of the nanoscale calcium carbonate is 45-48%. According to the low-gram-weight anti-leakage PE film, on the premise that low gram weight is ensured, the low-gram-weight anti-leakage PE film has air permeability, anti-leakage performance, appropriate contractibility, high tensile strength and high elongation at break, and the defects in the prior art are overcome.

The utility model relates to a CNC (Computer Numerical Control) positioning jig based on pneumatic driving, which comprises a box body, the inside of the box body is a sealed cavity, a thin film sheet is arranged in the center of the top of the box body, a positioning plate is arranged in the center of the thin film sheet, the thin film sheet and the positioning plate are made of elastic materials, and an elastic chuck is arranged on the positioning plate. The side face and the bottom of the box body communicate with a positive pressure pipeline and a negative pressure pipeline correspondingly, and pressure maintaining valves are installed on the positive pressure pipeline and the negative pressure pipeline correspondingly. According to the utility model, gas is filled into the box body by utilizing the positive pressure pipeline, so that a film sheet can be uniformly expanded outwards to drive the elastic chuck to uniformly expand, a workpiece can be uniformly supported, the positioning precision of the workpiece is improved, and the machining precision of CNC is further improved; gas in the box body is exhausted through the negative pressure pipeline, so that the film piece can be evenly expanded inwards to drive the elastic chuck to evenly contract, the contraction force of the elastic chuck is controlled by controlling the gas displacement through the pressure stabilizing valve, the outer wall of a workpiece is prevented from being damaged, and the workpiece can be evenly and firmly clamped.

The utility model discloses a wire harness sleeve thermal shrinkage machine, which performs thermal shrinkage on a thermal shrinkage sleeve of a wire harness, and comprises a mounting plate, an adjusting component and a heating component, one end of the adjusting component is connected with the mounting plate, the other end of the adjusting component is connected with the heating component, and the adjusting component at least comprises a rotating joint which can enable the heating component to move relative to the mounting plate; the heating component comprises a bearing body, a heating fan and an air outlet channel, the bearing body is of an annular structure which is at least in a major arc shape, and an air outlet of the air outlet channel is formed in the inner circumferential wall of the annular structure and faces the circle center of the annular structure. According to the wire harness sleeve thermal shrinkage machine disclosed by the invention, the air outlet time, the air outlet heat and the air outlet position of the heating fan are controlled as required, so that the wire harness is accurately positioned, the sleeve sleeved on the wire harness after thermal shrinkage is uniformly shrunk, the surface is smooth and free of wrinkles, the glue outlet amount of the glue sleeve after curing is controllable, and the production efficiency is improved. Therefore, the sleeve is sleeved on the wire harness in a high-quality thermal shrinkage manner, and the quality of the sleeve sleeved on the wire harness in a thermal shrinkage manner is improved.

The invention discloses a flat functional current collector and a preparation method thereof, and relates to the technical field of current collectors. The method specifically comprises the following steps that S1, an organic film and a metal foil are attached to the same release film, and interfaces in the thickness direction are in contact; an intermediate product A is obtained; s2, a metal layer is deposited on the face, away from the release film, of the intermediate product A, and an intermediate product B is obtained; and S3, removing the release film in the intermediate product B, and depositing a metal layer on the surface again to obtain the functional current collector. A continuous conducting layer can exist in the edge area of the functional current collector prepared by the method, and a tab is not required to be reserved or welded like a traditional current collector, so that the structural smoothness of the current collector is kept.

A device for manufacturing a solid high-edge polyethylene steel wire composite rib on the outer wall of a pipeline comprises a solid composite rib manufacturing mechanism and a solid composite rib bending and bonding mechanism. The equipment for manufacturing the solid high-edge polyethylene steel wire composite rib on the outer wall of the pipeline has the beneficial effects that the solid composite rib with a steel wire can be machined, the solid composite rib is spirally wound and welded to the periphery of the pipeline through the bending and bonding mechanism, the solid composite rib is not prone to deformation, and the solid high-edge polyethylene steel wire composite rib is manufactured. And the overall strength of the pipeline can be effectively improved. According to the technology for manufacturing the solid high-edge polyethylene steel wire composite rib on the outer wall of the pipeline, after a parison with a steel wire is extruded, slow cooling and curing are conducted through an air cooling mold, then rapid cooling and curing are conducted through a water cooling mold, the solid composite rib can be shrunk in a more balanced mode, and the flatness of the composite rib is kept; the bending bonding mechanism can adjust the bending degree of the solid composite rib according to pipes of different diameter types, so that the solid composite rib is welded to the periphery of the pipeline in a matched and spiral winding mode.

The present invention relates to the field of resource recycling and environmental protection production, and specifically to a dust removal device used in the process of recycling waste circuit boards, comprising an artificial processing frame, a dust collector is arranged on one side of the artificial processing frame, and a dust suction pipe is plugged and connected to the output end of the dust collector. The present invention can flexibly adjust the opening size of the dust cover according to waste circuit boards of different sizes by setting a first adjustment component, and can ensure that the dust cover can completely cover the surface of the waste circuit board as much as possible regardless of whether it is a larger or smaller size of the waste circuit board, thereby improving the adaptability of the dust removal device and meeting the dust removal requirements of circuit boards of various sizes in the process of recycling waste circuit boards. The present invention can realize the synchronous relative movement of two sliders by setting a driving component, and ensure that the expansion or contraction of the left and right sides of the dustproof elastic cloth is uniform, so that the opening size of the dust cover can be adjusted more accurately and quickly, thereby improving the convenience and efficiency of adjustment.

The invention discloses automobile stamping part assembling equipment, and relates to the technical field of assembling equipment, the automobile stamping part assembling equipment comprises a second U-shaped frame, a second servo motor is fixedly mounted on the second U-shaped frame, a second rotating shaft is fixedly mounted at the upper end of the second servo motor through an output shaft, and a first clamping rotating plate is fixedly mounted at the upper end of the second rotating shaft; according to the stamping part cleaning device, through the arrangement of the cleaning water tank, the water tank support, the air blower and the heating assembly, the stamping part cleaning device can effectively remove oil stains and impurities on stamping parts, the purity of a welding pool is guaranteed, and therefore the welding quality is improved; the welding strength of the outer plate and the inner plate of the engine cover is ensured, meanwhile, an oxide layer, rust and the like on the surface of a stamping part can be removed through cleaning, the cleaned metal surface is smoother, fusion during welding is facilitated, a welding seam is more uniform and compact, and the quality of a welding joint is improved.

The utility model relates to the technical field of optical detection, and particularly discloses an aperture off-axis total reflection type infrared optical system, which comprises an optical element and a lens cone, and the optical element comprises a primary lens, a secondary lens, a third lens and a detector. Incident light from a target is reflected by the primary mirror and then forms a primary image plane between the primary mirror and the secondary mirror, and then the incident light is reflected by the secondary mirror and the third mirror in sequence and reaches the focal plane of the detector without blocking to form a target image. The entrance pupil is arranged in front of the primary mirror; the primary mirror and the secondary mirror are eccentrically arranged in the Y-axis direction and are obliquely arranged around the X-axis. And the third mirror is eccentrically arranged in the Y-axis direction. The utility model has the advantages of compact structure, high efficiency, easy heat elimination, and good imaging quality.

The vacuum pump convenient to install comprises a T-shaped installation groove seat and a hollow block, the hollow block is connected to the lower side of the outer side wall of the T-shaped installation groove seat in a sleeved mode, and positioning grooves are formed in the upper sides of the front side and the rear side of the left side wall and the right side wall of an inner cavity of the T-shaped installation groove seat. A positioning groove is formed in the middle of the top of the vacuum pump body, a positioning block is slidably connected to the lower side of the inner cavity wall of the positioning groove, a mounting plate is fixedly connected between the inner side walls of the positioning block, a vacuum pump body is fixedly connected to the middle of the top of the mounting plate, and a fixing groove is formed in the middle of the bottom of the mounting plate. According to the vacuum pump, the vacuum pump body can be conveniently mounted and dismounted, daily maintenance is facilitated, damping can be conducted on the vacuum pump body when the vacuum pump body works, and therefore the influence of long-time vibration on use of the vacuum pump body is avoided.

This utility model discloses a bottle outer packaging wrinkle removal machine, including a frame and a box mounted on the top of the frame. The box has an inlet and an outlet at both ends. A transport mechanism is installed inside the box, including a conveyor belt horizontally arranged along the length of the box. One end of the conveyor belt extends beyond the inlet, and the other end extends beyond the outlet. Several high-temperature steam nozzles are arranged along the length of the conveyor belt on both sides and above it. A partition net is installed above the conveyor belt, and an inverted V-shaped gas collecting hood is installed above the partition net, with both ends extending to the inner sidewall of the box. This utility model reduces the flow rate of high-temperature steam through the partition net, improving the wrinkle removal effect of the high-temperature steam; the gas collecting hood cools the high-temperature steam into water droplets and further guides the water droplets to the outside of the conveyor belt, preventing water droplets from dripping onto the conveyor belt and interfering with the bottle wrinkle removal process.

This invention relates to the field of AC power transmission technology, and discloses an end-sealing assembly and method for insulating bushings used in ultra-high voltage AC power transmission. The assembly includes a mounting block, on which two double-slide linear drive modules are fixedly mounted. Two heat shrink tubing opening components and two heat drying components are respectively mounted on the two double-slide linear drive modules. The heat shrink tubing opening component includes a first hot air blower, and two first strip-shaped shape memory alloy tubes that can open and close vertically are mounted on the side of the first hot air blower. The heat drying component includes a swing mechanism, on which a second strip-shaped shape memory alloy tube is mounted. This invention solves the problems of uneven heating and subsequent uneven shrinkage of heat shrink tubing in traditional AC power transmission insulating bushings due to limited hot air coverage and poor operational stability during heating.

The invention discloses a cloth roller and a cloth rolling machine, and relates to the technical field of textile machinery. The cloth roller comprises a roller body, bearings are arranged on the two sides of the roller body, and the end of the roller body and the outer rings of the bearings are fixed through annular plates. Movable blocks are arranged on the outer sides of the bearings, the movable blocks and inner rings of the bearings are fixed through fixing rods, and a rotating shaft is movably connected between the inner rings of the two bearings on the two sides; an air inducing piece and a driving piece are arranged on a shaft body of the rotating shaft on at least one side. The cloth roller is provided with the roller, the movable block, the bearing, the rotating shaft and the driving piece, under driving of the driving piece, the rotating direction of the rotating shaft is opposite to the rotating direction of the roller, the central axis of the roller coincides with the central axis of the rotating shaft, the torque of the rotating shaft can offset part of the torque of the roller, and extra eccentric force generated by the cloth roller in the winding process is reduced; and the rotation stability of the cloth roller and the structural stability of the machine are improved.

The utility model relates to the technical field of air bags, in particular to a three-layer air bag structure special for a watch, which comprises a first air bag, a second air bag and a third air bag which are sequentially stacked, the first air bag is communicated with the second air bag through a first through hole, the second air bag is communicated with the third air bag through a second through hole, and a first air nozzle is arranged on the first air bag. A first air nozzle is arranged on the first air bag, a second air nozzle is arranged on the second air bag, the first air nozzle is connected with an external air pump for air intake or / and air release, the second air nozzle is connected with an external sensor for pressure detection, and the third air bag is attached to the wrist of a user. According to the utility model, air is fed through the first air nozzle, sequentially passes through the first air bag, the second air bag and the third air bag, finally returns to the second air bag and forms circulating air flow through the second air nozzle, so that the pressure detected by an external sensor is more accurate, and the measurement accuracy and stability of the sensor are improved.

The utility model relates to the technical field of motors, and discloses a rotor assembly, a motor and a household electrical appliance, the rotor assembly comprises a rotating shaft, a plastic package body and an iron core, the plastic package body is connected to the rotating shaft, and the iron core is connected to the plastic package body; wherein the plastic package body is packaged between the rotating shaft and the iron core, the iron core surrounds the rotating shaft, at least one of the two end faces of the plastic package body is provided with a thickness reducing hole in the axial direction of the rotating shaft, and the thickness reducing hole is located between the rotating shaft and the iron core. The thickness reducing holes are formed in the end face of the plastic package body, the wall thickness of the position, between the rotating shaft and the iron core, of the plastic package body is reduced, the wall thickness of all positions of the plastic package body is uniform, shrinkage of all positions is uniform in the injection molding process, and the defects of internal shrinkage cavities, overlarge internal stress, uneven deformation and the like of the plastic package body are overcome; and the structural strength and the dimensional precision of the rotor assembly can be improved.

This utility model belongs to the field of pipeline protection, specifically relating to a heat-shrinkable infrared heating furnace for pipeline outer sheaths. It includes a pair of semi-circular furnace bodies, which are interlocked to form a tubular structure. The furnace bodies are hinged together by a hinge shaft, and the furnace bodies have the freedom to rotate and open / close around the hinge shaft via the extension and retraction of a telescopic cylinder. Each furnace body includes a pair of end plates, an inner protective net disposed between the two end plates, and an outer cover. The inner protective net and the outer cover are coaxially arranged and fixedly connected to the end plates to form a semi-circular cavity. A set of heating tubes is disposed within the cavity, and the heating tubes are arranged sequentially at intervals around the axis of the tubular structure. The distance between the axis of the tubular structure and each heating tube is equal. The hinge shaft and the heating tubes are parallel to the axial direction of the furnace body. This heating furnace can ensure that the heating temperature of each area of ​​the outer sheath is consistent, improving the protective effect of the outer sheath on the pipeline.

The invention provides a ceramic knuckle bearing and a preparation method, and belongs to the technical field of knuckle bearing manufacturing. The knuckle bearing comprises an inner ring and an outer ring, and the maximum sectional area position of the inner ring is located in the spherical cambered surface of the outer ring; the inner ring comprises the following raw materials in parts by weight: 3-6 parts of a monomer, 7-12 parts of a cross-linking agent, 0.1-0.5 part of a dispersing agent, 0.3-0.5 part of an initiator, 0.02-0.04 part of a catalyst and 80-100 parts of aluminum oxide powder; the raw materials of the outer ring comprise 60-70 parts of aluminum oxide powder and white corundum powder, and the mass ratio of the white corundum powder to the aluminum oxide powder is 0.4-1. The inner ring and the outer ring are different in composition and adopt a gel casting method, so that the shrinkage amounts of the inner ring and the outer ring are different in the sintering process, and the inner ring and the outer ring can be naturally separated in the preparation process and cannot be sintered together.

The invention discloses flexible transparent epoxy resin as well as a preparation method and application thereof.The preparation method comprises the following steps: firstly, adding an amino silane coupling agent into an epoxy resin monomer at normal temperature, and uniformly stirring to obtain a mixed solution; then heating the mixed solution for reaction, and after the reaction is finished, carrying out vacuum treatment on the reaction solution to obtain a precursor solution; and finally, carrying out curing treatment on the precursor solution to prepare the flexible transparent epoxy resin. The preparation method is simple in process and reasonable in design, and the obtained flexible epoxy resin has good mechanical strength, thermal stability and transparency.

The invention relates to the technical field of mixed-flow pumps, and particularly discloses a vertical two-way mixed-flow pump flow guide device which comprises a mixed-flow pump body, a water outlet flow guide device is arranged above the mixed-flow pump body, a water inlet flow guide device is arranged below the mixed-flow pump body, and the water inlet flow guide device comprises a flow guide cone. A cover plate is arranged on the upper side of the flow guide cone, a plurality of reserved holes are evenly formed in the circumferential side of the flow guide cone, and a water inlet horn corresponding to the water inlet flow guide device is arranged on the lower portion of the mixed-flow pump body. Water flow is optimized through the box culvert type water inlet flow channel and the water inlet flow guiding device, it is ensured that the two-way water inlet flow state is uniform and smooth, bad flow states are reduced, the operation stability of the mixed-flow pump is improved, kinetic energy loss is reduced through the two-way elbow water outlet flow guiding device, a diffusion pipe is prolonged, the water outlet effect and efficiency are improved, meanwhile turbulent flow and vibration are avoided, and the flow guiding device is simple in structure and low in cost. The construction difficulty is low, installation and maintenance are convenient, and the overall construction and production cost is reduced.

The invention relates to the technical field of optical fiber communication equipment, in particular to an intelligent temperature control heat shrink tube heating device and method for 12-core optical fiber splicing, and the device comprises a supporting and fixing module, a magnetic type heating execution module, an intelligent temperature control module, an induction triggering module, a portable power supply module and a protective portable module. The supporting and fixing module comprises a shell, a bottom plate, a supporting rod and a switch fixing plate; the bottom plate is fixed in the shell, the supporting rod is vertically fixed to the top of the bottom plate, and the body is fixed to the top of the bottom plate and embedded into the lower magnet. The switch fixing plate is fixed on one side of the bottom plate; the disassembly and assembly time of the magnetic heating assembly is less than or equal to 10 seconds, tool assistance is not needed, and the cleaning and maintenance efficiency of the heating plate is improved by 80%; the replaceable lining is adaptive to heat shrink tubes with different outer diameters, the universality is high, the 12-core independent heating channel and PID precise temperature control are adopted, the temperature deviation is smaller than or equal to 0.8 DEG C, the heat shrink tubes shrink uniformly, the connection loss dispersion is reduced to be within + / -0.01 dB, and the transmission stability is greatly improved.

The utility model relates to a high-strength glass fiber reinforced plastic plate, which belongs to the technical field of glass fiber reinforced plastic plates and comprises at least one fiber reinforced layer, two outermost fiber reinforced layers are provided with surface felt layers with the same number, and two outermost surface felt layers are provided with gel coat layers with the same thickness. And the fiber reinforced layer and the surface felt layer are integrally infiltrated by resin. The method has the effects that the warping phenomenon of the glass fiber reinforced plastic plate is reduced, and the flatness of the glass fiber reinforced plastic plate is improved.

This invention discloses a fully automatic feeding, positioning, and heat-shrink packaging machine for grinding wheels, comprising a frame assembly (1), an automatic feeding module (2), an adaptive positioning module (3), a film sealing and cutting module (4), an adjustable speed heat-shrink module (5), a finished product discharge module (6), and an electrical control system (7). The automatic feeding module (2), adaptive positioning module (3), film sealing and cutting module (4), adjustable speed heat-shrink module (5), and finished product discharge module (6) are sequentially installed on the frame assembly (1) along the conveying direction. The electrical control system (7) is electrically connected to each module to achieve coordinated operation of each module. Through modular integrated design, adaptive precise positioning, stepless speed-adjustable heat shrinking, and intelligent collaborative control, the machine achieves fully automated packaging of grinding wheels from feeding to discharging without human intervention, significantly improving packaging accuracy, production efficiency, and product qualification rate.

This invention relates to a method for preparing superconducting targets using reaction sintering. The invention provides three reaction sintering processes for preparing superconducting targets, which can rapidly advance densification at ambient pressure and lower peak temperatures, avoiding the problems of excessive precipitation of Ba / Cu-rich liquid phase and insufficient densification caused by high temperature or high pressure. This achieves the preparation of high-density superconducting targets without Ba / Cu liquid phase precipitation and volatilization, and less prone to cracking, thereby improving the critical current density and other properties of the superconducting targets. Specifically, the low-temperature synthesis-pulverization process can prepare targets with higher density and better critical current density and other properties; the low-temperature synthesis-jaw crushing process can prepare high-density targets with a higher yield, better supporting mass production; and the low-temperature negative pressure synthesis-pressureless sintering process balances high density and yield, while eliminating high-pressure tooling, simplifying the sintering process, and reducing equipment wear.

The present invention discloses a cloth winding roller and a cloth winding machine, and relates to the technical field of textile machinery. A cloth winding roller comprises a roller, bearings are arranged on both sides of the roller, and the end of the roller is fixed to the outer ring of the bearing by an annular plate; a movable block is arranged on the outer side of the bearing, and the movable block is fixed to the inner ring of the bearing by a fixing rod, and a rotating shaft is movably connected between the two inner rings of the bearings on both sides; an air inducing member and a driving member are arranged on the shaft body of at least one side of the rotating shaft. The present invention is provided with a roller, a movable block, a bearing, a rotating shaft and a driving member. When driven by the driving member, the rotation direction of the rotating shaft is opposite to the rotation direction of the roller, and the central axis of the roller and the rotating shaft coincide, so that the rotating shaft torque can offset a part of the torque of the roller, thereby reducing the extra eccentric force generated by the cloth winding roller during the winding process, and improving the rotation stability of the cloth winding roller and the structural stability of the machine.

The utility model provides a motor end cover die-casting die, and relates to the technical field of die-casting dies, the motor end cover die-casting die comprises an upper die base, a lower die base and two die feet, the lower end of the upper die base is provided with an upper die cavity, the upper end of the lower die base is provided with a lower die cavity, the upper end of the lower die base is provided with a feeding channel, and the upper end of the lower die base is provided with a plurality of cinder ladles; a cooling water path is embedded in the lower die holder; the feeding channel and the injection molding cavity are independent, so that aluminum alloy cannot directly scour the upper mold cavity and the lower mold cavity during die-casting injection, and erosion to the upper mold cavity and the lower mold cavity is reduced; the cinder ladle is separated from the injection molding cavity, so that the flatness of the injection molding cavity is ensured, the processing requirement can be met, the processing cost is reduced, and the competitiveness is improved; by arranging the cooling water channel, it is guaranteed that the injection molding cavity is heated evenly, and aluminum alloy can shrink evenly and does not deform when cooled and solidified, so that it is guaranteed that a motor end cover casting meets the machining requirement, good sealing performance is achieved, and machining procedures are saved.

The present invention provides automated textile conveying, storage and packaging equipment, and relates to the technical field of textile processing, comprising: an assembly seat, wherein two groups of alignment needles are fixedly arranged on the top front side of the assembly seat in cooperation with a bracket; a guide die seat, wherein the guide die seat is fixedly arranged on the top rear side of the assembly seat; a cross slot is provided on the top of the guide die seat, wherein the length of the front slot of the cross slot is greater than the length of the rear slot of the cross slot; two groups of sliding through slots are provided on the front parts of both sides of the guide die seat, and according to the pressing plate and the forward push plate of each embodiment of the present invention, a two-stage folding function is provided, wherein the pressing plate enters the cross slot, and during the descending process of the cross slot, the middle of the textile cloth is pressed downward for the first folding, and the electric cylinder B is started to push the spring plate forward to fold the textile forward for the second stage, and one end of the cloth is pushed out, and the cloth is directly pulled out manually to complete the automatic folding, thereby solving the problem that the existing packaging device lacks the second-stage automatic folding function.

The invention discloses a manufacturing method of a high-temperature-resistant filter capacitor and the capacitor, and relates to the field of capacitor manufacturing, a square plastic shell, a group of metal electrodes and a metallized film are provided, the metallized film is clamped between the group of metal electrodes, and the group of metal electrodes are divided into a positive electrode plate and a negative electrode plate; winding a group of metal electrodes and a metallized film into a core, performing hot pressing process treatment on the core, putting the core into a square plastic shell, and encapsulating the metal electrodes and the metallized film wound in the square plastic shell with epoxy resin to form a finished product capacitor; according to the invention, the internal pressure of the capacitor is uniformly distributed through hot pressing, metal spraying is carried out after the polymerization of the film is ensured, and after processing and assembling, the capacitor core is put into the oven and baked under certain temperature and time conditions, so that the internal and external shrinkage of the capacitor core is ensured to be uniform, and through the optimization of hot pressing, bulk baking and other processes, the performance of the capacitor core is improved. The risk of failure of the capacitor at high temperature is reduced, and the service life is prolonged.

This invention provides a gradient silicon nitride ceramic femoral head prosthesis and its preparation method, relating to the technical fields of clinical medicine and biomaterials. The femoral head prosthesis is prepared from 88-94 parts of silicon nitride powder, 4-12 parts of sintering aid, 5-20 parts of tungsten carbide titanium, and 0-30 parts of pore-forming agent, wherein the pore-forming agent cannot be 0 parts. The gradient silicon nitride ceramic femoral head prosthesis of this invention retains the advantages of silicon nitride ceramics—low wear, low friction, high strength, high fracture toughness, and good chemical stability—at the interface between the femoral head prosthesis and the liner, while reducing wear on the titanium alloy femoral stem cone caused by the large hardness difference between the femoral head prosthesis and the liner. This reduces the incidence of organ toxicity, periprosthetic osteolysis, and aseptic loosening caused by metal wear debris, improves the survival rate of the femoral head prosthesis and the femoral stem cone, reduces the revision rate of replacement surgery, and saves patients' treatment costs.

The present application relates to the technical field of optical fiber fusion, in particular to a kind of hollow-core optical fiber fusion splicer with variable position cross fan-shaped operation core adjusting mechanism;Including cabinet and the hinge cover of cabinet upper port;The core adjusting mechanism is equipped in the cabinet;The lower presser foot with V-shaped groove at end is moved in position by the core adjusting mechanism;Upper presser foot corresponding with lower presser foot is provided in the inside of cover;The transmission groove is provided in the inside of pedestal in the cabinet;Gear set is transmission connected in the transmission groove;Gear set is driven by driving motor, and is output by eccentric shaft;The present application is lubricated impact to gear set in the process of core adjusting by lubricating assembly, to make gear set more stable in operation after lubrication, on the other hand, the wear of gear set is reduced after the debris on gear set is washed away, the service life of gear set is improved, the service life of core adjusting mechanism is improved, and the overall quality of optical fiber fusion splicer is improved.

This utility model discloses a cooling device for the production of coated wood veneer, including a box body. An electric slide rail is fixedly connected to the top of the inner wall of the box body, and an electric slider is slidably engaged with the outer wall of the electric slide rail. The cooling device also includes a cooling unit disposed inside the box body; a sensing device is disposed on the box body; and a fixing device is disposed below the electric slider. The cooling unit uniformly cools the wood veneer. This utility model relates to the field of cooling technology for the production of coated wood veneer. Through the cooperation of the cooling box, storage box, and refrigerator, when cooling of the wood veneer is required, a circulation pump is first started. The circulation pump draws water from inside the storage box through a distribution pipe into the water drains inside the two cooling boxes. Then, the refrigerator is started, and its two output ends cool the cooling spaces on both sides of the box body separated by an isolation device.