151results about How to "Reduce manufacturing production costs" patented technology

The invention discloses a high-efficiency hydrogenation catalyst and a method for preparing the high-efficiency hydrogenation catalyst. The high-efficiency hydrogenation catalyst comprises the following components by weight: 5-30% of active metal, 0-20% of auxiliary metal and 40-85% of carrier. The active metal is copper or copper oxide; the auxiliary metal is the composition of one or more than two of the sodium, aluminum, nickel, zinc, cobalt, manganese, cerium, lanthanum and strontium; and the carrier the silicon dioxide of silica sol or the aluminum oxide of pseudo-boehmite or aluminum salt. The high-efficiency hydrogenation catalyst is prepared by adopting the impregnation or precipitation method, and the urea is used as the precipitating agent. Compared with the prior art, the catalyst prepared under the condition that the content of the active metal and the auxiliary metal is low has high catalytic activity and long life. In addition, the catalyst has low preparation and production cost and can be universally used for preparing methyl glycolate, ethylene glycol and ethanol by catalytic hydrogenation and preparing 1,2-glycol from glycerin by hydrogenation.

The invention discloses a multi-hole superfine denier polyamide 6 POY / FDY interlacing composite fiber, its preparation method and its device. The invention is characterized in that a current FDY production device is used, a raw material polyamide 6 is sliced and dried, an additive is on-line added, the sliced polyamide 6 is subjected to screw extrusion and melt extrusion, strand which is subjected to annealing and circular-blow wind cooling solidification is divided in to two beams, one beam of the strand is subjected to oiling, pre-networking, stretching and thermosetting to obtain FDY; another beam of the strand is subjected to oiling and then is input to a first godet roller, and then subjected to pre-networking and input to a second godet roller to obtain POY, then simultaneously input in an interlacing nozzle for compositing, a process of winding formation is carried out to prepare the multi-hole superfine denier polyamide 6 POY / FDY interlacing composite fiber. According to the fiber molecular structure performance design and the fiber form control, a process optimization scheme is determined to obtain the composite silk fiber with differential linear density, differential elongation and differential shrinkage, the fiber has the advantages of moisture absorption, breathability, good drapability, high color rendering, good comfortableness and the like.

The invention discloses a vending mechanism of a vending machine. The vending mechanism comprises a goods taking unit and a goods delivering unit. The goods taking unit comprises a lifting platform and a goods taking device comprising a base plate, a worm motor fixing plate, a front damper and a friction wheel. The friction wheel is arranged at one end of the base plate through friction wheel fixing plates; friction wheel transmission shafts, intermediate shafts, push rods and transmission shafts are inserted to the friction wheel fixing plates, and a friction wheel clamping device and an optoelectronic switch are arranged under the base plate; a friction wheel rotating driving device, a damper control device and a goods sensing driving device are arranged on the worm motor fixing plate; and the goods delivering unit is a rotary goods bucket. By the adoption of the lifting platform, a motor is not needed to be arranged in a goods aisle, manufacturing cost of products is effectively reduced, aisle failure rate is reduced, and the rotary goods bucket can bring convenience to manufacture and installation of a warehouse, and is reliable in performance.

The invention relates to a wireless router with a built-in user management function, a system and a networking method thereof. The functions of user authentication and access authority control are provided and the access control can be performed in time and flow manners. The wireless router comprises a local area network Ethernet interface, a wide area network Ethernet interface, a wireless network module, an account data storage and an account authentication managing module, wherein the account data storage is used for storing information of an access user of a wireless network; the account authentication managing module is used for propelling a log-in page to the user after the user is connected to the wireless network and calling the information of the access user of the wireless network to authenticate the user identity; the account authentication managing module is respectively connected to the wireless network module, the account data storage and the wide area network Ethernet interface; the local area network Ethernet interface is connected to the wide area network Ethernet interface; the information of the access user of the wireless network comprises user name, account level, access authority expiry date and residual flow; and the account authentication managing module works in a mainly used mode or a subordinate mode.

The invention relates to a single-mode optical fiber with low attenuation and large effective area. The single-mode optical fiber comprises a core layer and a wrapping layer, and is characterized in that the core layer comprises a sunken inner core layer and an outer core layer, the radius r1 of the sunken inner core layer is 2.2 - 3.5 microns, delta n1 is 0. 08% - 0. 20%, the radius r2 of the outer core layer is 5 -6.5 microns, delta n2 is 0.20%-0.32%, the wrapping layer wraps outside the core layer, the wrapping layer sequentially comprises an inner wrapping layer, a sunken wrapping layer and an outer wrapping layer from inside to outside, the radius r3 of the inner wrapping layer is 9 -13 microns, delta n3 is -0.06% -0.06%, the radius r4 of the sunken wrapping layer is 11-18 microns, and the delta n4 is -0.60%- -0.35%; and the outer wrapping layer is a pure silicon dioxide glass layer. A sunken structure of the central core layer is arranged, so that the internal energy distributionof an optical fiber is changed from the typical gaussian distribution to the non-gaussian distribution, and the effective area of the optical fiber is effectively increased on the basis that the cut-off wavelength and the dispersion performance of the optical fiber are ensured. The optical fiber is low in attenuation and large in effective area. The optical fiber is low in manufacturing cost andhas relatively good bending loss and dispersion performance.

The invention relates to a method for preparing an aluminum nitride single crystal material, comprising the following steps: preparing a III-nitride nucleation layer on a substrate; preparing a III-nitride crystallization layer on the III-nitride nucleation layer; preparing a stress covariation layer on the III-nitride crystallization layer; preparing a III-nitride self-decomposing decoupling layer on the stress covariation layer; preparing a first III-nitride template layer on the III-nitride self-decomposing decoupling layer; preparing a second III-nitride template layer on the first III-nitride template layer; preparing an aluminum nitride thick-film monocrystalline material layer on the second III-nitride template layer; and preparing an aluminum nitride single crystal wafer substrate material by adopting an intermediate process. The method can be used for providing low-cost large-size aluminum nitride single crystal wafer substrate material to study and produce ultraviolet and deep-ultraviolet semiconductor optoelectronic devices, thereby having very good practical value and marketing prospect.

The invention relates to a right-angle screwing connection structure of a plastic steel window frame and an installing method of the right-angle screwing connection structure. The right-angle screwing connection structure comprises a first plastic steel sectional material, a second plastic steel sectional material and a connecting element, wherein the first plastic steel sectional material and the second plastic steel sectional material are mutually vertical, the connecting element comprises an outer sheathing element, an inner embedding element and a steel inserting element, and the first plastic steel sectional material and the second plastic steel sectional material are fixedly and vertically connected into a whole through the connecting element. The right-angle screwing connection structure of the plastic steel window frame has the advantages that the connecting element is adopted at a connecting part of the window frame for realizing the combination and connection, the traditional welding mode is completely replaced, on one hand, the occurrence of aggregation is eliminated, the appearance effect of the plastic steel window frame is beautified, on the other hand, the plastic steel window frame can be combined and dismounted, in a special application scene, the plastic steel window frame can be dismounted for replacing the occupied physical space, and the transportation, the loading and the unloading are convenient. Meanwhile, the right-angle screwing connection structure of the plastic steel window frame has the advantages that the installation is convenient, the processing process is simple, the manufacturing and production cost is low, the effect is good, obvious social benefits and economic benefits are realized, and the right-angle screwing connection structure of the plastic steel window frame is worth of being popularized and applied.

The invention discloses an internal-heated integrated evaporation boat with an aluminum oxide porous structure buffering layer. Surface coatings of the evaporation boat totally comprise two layers. The inner layer is the Al2O3 buffering layer of a loose porous structure, and the outer layer is the compact low-porosity corrosion-resistantAl2O3 coating. Firstly, through a rotary-coating steeping technique, the Al2O3 buffering layer with the thickness being 0.1-0.3 mm is prepared on the surface of a matrix; and then through a plasma spraying technology, the Al2O3 corrosion-resistantlayer with the thickness being 0.5-1 mm is sprayed and prepared on the evaporation boat with the buffering layer. According to the composite technique, the evaporation boat with the Al2O3 coatings of different microstructures is prepared; in service, the buffering layer of the porous structure can achieve the stress relieving effect and can further prevent the problem of matrix oxidization caused by later spraying; and the compact low-porosity Al2O3 coating brings excellent corrosion resistance into play and can be widely applied to the technical field of vacuum evaporation metal thin films.

The invention relates to a single-mode optical fiber with low attenuation and large effective area. The single-mode optical fiber comprises a core layer and a wrapping layer, and is characterized in that the radius r1 of the core layer is 5.4-6.5 microns, the relative refractive index difference delta n1 is 0. 18% -0.32%, the core layer is wrapped by the wrapping layer, and the wrapping layer sequentially comprises, from inside to outside, an inner wrapping layer, a sunken wrapping layer and an outer wrapping layer, the radius r2 of the inner wrapping layer is 9 -13 microns, and the relative refractive index difference delta n2 is -0.10%-0.10%, the radius r3 of the sunken wrapping layer is 10.5-15 microns, and the relative refractive index difference delta n3 is -0.60% - -0.35%; and the outer wrapping layer is a pure silicon dioxide glass layer. The viscosity of the core wrapping layer is optimized by adopting alkali metal, so that the attenuation performance of the optical fiber is improved. Meanwhile, the waveguide structure of the core wrapping layer is reasonably designed, so that the optical fiber has a large effective area. The method is simple in process and convenient for preparing a large-size optical fiber prefabricated rod. The outer wrapping layer of the outermost layer adopts pure silicon dioxide, so that the proportion of the fluorine-doped glass in the optical fiber is reduced, so that the production cost of the optical fiber is reduced.

The invention relates to a low-attenuation and large-effective-area single-mode optical fiber, which comprises a core layer and a cladding layer. The low-attenuation and large-effective-area single-mode optical fiber is characterized in that a radius r1 of the core layer ranges from 5.2 to 6.5 microns; a relative refractive index delta n1 of the core layer ranges from 0.20 to 0.30%; the exterior of the core layer is sequentially wrapped by an internal cladding layer, a pure silicon dioxide internal cladding layer, a recessed cladding layer and an external cladding layer from the inside to the outside; a radius r2 of the internal cladding layer ranges from 8 to 10.5 microns, and a relative refractive index delta n2 ranges from -0.10 to 0.05%; a radius r3 of the pure silicon dioxide internal cladding layer ranges from 9.5 to 14 microns, and a relative refractive index delta n3 ranges from -0.03 to 0.03%; a radius r4 of the recessed cladding layer ranges from 13 o 18 microns, and a relative refractive index delta n4 ranges from -0.50 to -0.25%; and the external cladding layer is a pure silicon dioxide glass layer. The low-attenuation and large-effective-area single-mode optical fiber adopts a core cladding layer design co-doped with germanium, fluorine and alkali metal, and optimizes the viscosity so as to reduce attenuation performance of the optical fiber; and the core cladding waveguide structure is reasonably designed, so that the optical fiber has large effective area; and the viscosity matching and stress matching inside the optical fiber are balanced by means of the pure silicon dioxide glass, thereby further reducing attenuation.

The invention discloses a cable support. The cable support comprises a body and supporting arms, wherein the supporting arms are connected with the body in a rotating mode. A fixed supporting arm structure in the traditional technology is changed into the rotatable structure, and therefore the angle of the supporting arms can be freely adjusted, and installation of a cable can be completed in various use environments. It is not needed to specially design or manufacture a support suitable for specific environments; the cable support is suitable for mass production, various types of customization are avoided, and therefore the manufacturing and production cost can be greatly lowered; the cable support facilitates packaging and transportation, the supporting arms can be folded in the packaging and transportation processes, and therefore the occupied space is reduced, the transportation cost is lowered, and packaging is easier.

A slew rate enhancement circuit for adjusting a gamma curve including a main output stage, a monitoring stage, an assistant output stage and a gamma curve generating device is provided. The main output stage also generates a first push signal and a first pull signal according to the input voltage, and thereafter the second push signal and second pull signal are level shifted by the monitoring stage. A second push signal and second pull signal will turn on or turn off the assistant output stage to decided whether to output an assistant current to the load or not. The gamma curve generating device receives the assistant current to outputs at least one gamma reference voltage for adjusting a gamma curve. Specially, the improved compact circuit does not increase static operating current for the original operational amplifier and occupy a small chip area.

The invention relates to a single mode fiber with a low damping coefficient. The single mode fiber with the low damping coefficient comprises a core layer and a cladding layer and is characterized in that the radius r1 of the core layer is 3.9-4.6Mum, the relative index of refraction delta1of the core layer is 0.08%-0.24%, the core layer covers an inner cladding layer, an concaving inner cladding layer, an auxiliary outer cladding layer and an outer cladding layer from interior to exterior, wherein the radius r2 of the inner cladding layer is 8-15Mum, the relative index of refraction delta2 of the inner cladding layer is-0.30 %--0.05 %,the radius r3 of the concaving inner cladding layer is 14-20Mum, the relative index of refraction delta3 of the concaving inner cladding layer is -0.6 %--0.2 %, the radius r4 of the auxiliary outer cladding layer is 35-50Mum, and the relative index of refraction delta4 of the auxiliary outer cladding layer ranges from -0.35 % to -0.05 %. The outer cladding layer is a pure silicon dioxide glass layer. The single mode fiber with the low damping coefficient has the advantages that the damping coefficient of a fiber is reduced, and through the reasonable design on the section face of each core and cladding layer of the fiber, the fiber is provided with a MFD equal to or larger than 8.7Mum; the section face of the fiber adopts a multilayer step-pattern concaving cladding structure, the wide cladding structure is used for limiting fundamental mode reveal, and a good improvement function on the bending loss of the fiber is achieved.

The present invention relates to an ultralow attenuation large-effective-area single-mode optical fiber. The ultralow attenuation large-effective-area single-mode optical fiber comprises a core layer and wrapping layers, and is characterized in that a radius R1 of the core layer is 4.5-6.5 [mu]m, [delta]1 of the core layer is -0.05% to 0.10%, the core layer is wrapped from inside to outside in turn by an inner wrapping layer, a first sunken inner wrapping layer, a middle inner wrapping layer, a second sunken inner wrapping layer, an auxiliary outer wrapping layer and an outer wrapping layer, a radius R3 of the inner wrapping layer is 8.5-14 [mu]m, [delta]2 is -0.35% to -0.12%, an radius R3 of the first sunken inner wrapping layer is 13-22[mu]m, [delta]3 is -0.7% to -0.30%, a radius R4 of the middle inner wrapping layer is 14-23[mu]m, [delta]4 is -0.40% to -0.15%, a radius R5 of the second sunken inner wrapping layer is 28-30 [mu]m, [delta]5 is -0.6% to -0.25%, a radius R6 of the auxiliary outer wrapping layer is 35-50[mu]m, [delta]6 is -0.55% to -0.15%, and the outer wrapping layer is a pure silicon dioxide glass layer. The ultralow attenuation large-effective-area single-mode optical fiber is low in attenuation and large in effective area, and has excellent bending loss and dispersion characteristics, and cabling cut-off wavelength is smaller than 1530 nm.

The invention discloses a self-adaption clamp suitable for complex hook face machining and a use method of the self-adaption clamp suitable for complex hook face machining. The self-adaption clamp suitable for complex hook face machining comprises a fixing frame, multiple vertical positioning parts and multiple horizontal positioning parts, wherein the fixing frame is provided with a horizontal board, and multiple sliding grooves are evenly formed in the horizontal board; each vertical positioning part comprises a sliding rod and a sucker, and the sliding rods are vertically arranged, and are installed in the multiple sliding grooves; the suckers are connected with the tops of the sliding rods through spherical joints, and are used for adsorbing to-be-positioned complex hook face parts; each horizontal positioning part is located at one side of one corresponding vertical positioning part in a one-to-one corresponding mode, each horizontal positioning part comprises a pneumatic cylinder and a piston, and each pneumatic cylinder is located at one side of one corresponding sliding rod; and the pistons are located between the pneumatic cylinders and the sliding rods, and are used for compressing the sliding rods nearby by adjusting the telescopic lengths of the pistons, so that displacement of the sliding rods in vertical directions is limited. The problems that in existing methods, the clamp production cost is high, the work reliability is low, an application range is small, and the like are solved.

The invention discloses an unilateral cavity free foaming method. A biomass material is arranged in a lower mold; an upper mold extrudes the biomass material in the lower mold for shaping by set time; the upper mold is deviated from the lower mold; the biomass material is foamed in the lower mold to realize unilateral cavity baking foaming; one of the upper mold and the lower mold is connected with a moving mechanism; and the upper mold is deviated from the lower mold under the effect of the moving mechanism after the set time of the upper mold and the lower mold extruding the biomass material. The unilateral cavity free foaming method largely shortens the product drying time, reduces the product original pulp use level, improves the product cell quality and the buffering performance, reduces the raw material use cost and the product production cost, is excellent in actual utility, and is excellent in reference on traditional mold production.

The invention provides a honeycomb ground paper production line device which comprises an automatic sheet-fed device (01), a centering belt conveyor (02), a single-rubber-roller double-station adhesive coating machine (03), an automatic paper folding conveyor device (04) and a compacting machine (05). The honeycomb ground paper production line device is especially used for processing art and craft products. Device combination is simple, alternated and misplaced adhesive coating of adhesive lines of paper is completed by one machine, production efficiency is high, and the manufacture and production cost of the device is low.

The invention relates to the field of conductive thin film materials and provides a ZnO composite transparent conductive thin film based on a flexible substrate and a preparation method thereof. At first, a bottom layer of ZnO, a middle metal layer consisting of method Al and metal Cu and a top layer of ZnO are sputtered on a flexible PET substrate by magnetron sputtering, then a ZnO composite transparent conductive thin film based on the flexible PET substrate is obtained. According to the invention, the ZnO composite transparent conductive thin film based on the flexible substrate ensures high light transmittance and electrical conductivity, and meanwhile, the raw material price is greatly reduced and is easier to obtain, the preparation method has the advantages of simple preparation, good controllability and low requirement for equipment operation, and can be widely used in industry.

The invention discloses a screw locking machine of a multi-axis mechanical arm, and relates to the technical field of screw locking machines. During use, a locking head assembly is moved to the position above a product to be subject to screw locking through a multi-axis mechanical arm mechanism, a Z-axis motor drives a Z-axis lead screw to rotate, and therefore the locking head assembly descends to the position away from the product by the proper distance; a locking air cylinder drives a locking rod to descend, a driving part can drive the locking rod to rotate, and therefore a screw is locked into the product; compared with the prior art, a Z-axis mechanism and a locking mechanism are organically combined with the mechanical arm, the locking rod is arranged at the front end of the mechanical arm in a penetrating manner, the structure is compact, the size is small, the weight is large, the manufacturing and producing cost is greatly reduced, and economic benefits are improved.

The invention discloses a preparation method for an electrode material of a secondary lithium battery with high specific energy, belonging to the field of electrode materials. The preparation method comprises the following steps: putting mixed powder of oat and sesame into a tubular furnace for calcining so as to obtain solid powder 1; drying and crushing the white parts of shaddock peel and carrying out calcining so as to obtain a powdery solid 2; mixing the solid powder 1 with the powdery solid 2, adding potassium hydroxide solid into the obtained mixture and carrying out calcining so as to obtain a calcinate; soaking the calcinate in a hydrochloric acid solution to modify the surface of the calcinate; sealing and soaking the surface modified substance in a carbon disulfide solution with dissolved elemental sulfur; and after soaking, carrying out pumping filtration and drying so as to obtain the electrode material. A lithium-sulfur battery with high specific energy can be prepared from the electrode material prepared in the invention, and the prepared lithium-sulfur battery has high conductivity, high specific energy, a low price, slow capacity fading in discharge cycles, and good cycle performance.

The invention relates to the technical field of cable processing, and particularly discloses an energy-saving electronic cable winding device. The energy-saving electronic cable winding device comprises a base and a cable roller, wherein a supporting frame and a supporting seat are fixedly arranged on the upper surface of the base; a motor is fixedly arranged on the side wall of one end of the supporting frame; an output shaft of the motor is coaxially and fixedly connected with a driving belt wheel and a rotating shaft; an inner driving gear, a driven belt wheel and an outer driving gear which are coaxially and fixedly connected are rotationally arranged on the side wall of the other end of the supporting frame; a transmission gear and a driven gear are arranged on the supporting frame; the driven gear is coaxially connected with a rotating rod; a threaded groove rod is rotationally arranged between the supporting frame and the supporting seat; the rotating rod is nested in the threaded groove rod in a sliding mode; a sliding block is nested on the threaded groove rod; a rotating roller is arranged on the sliding block; and sliding rods are nested on the two sides of the sliding block on the supporting frame and the supporting seat in a sliding mode. The energy-saving electronic cable winding device has the advantages of being simple in structure, convenient to operate, low inmanufacturing cost, good in regularity, smooth in sliding, good in stability and convenient to popularize and implement.

The invention relates to a multifunctional multi-axis mechanical arm locking screw machine. In the screw locking process, a material collecting head is higher than a locking head assembly, and the locking head assembly can be moved to the position above a product of a screw to be locked through a multi-axis mechanical arm mechanism; and then a Z-axis motor drives a Z-axis screw rod to rotate, so that the locking head assembly descends to the position away from the product by a proper distance, a locking cylinder drives a locking rod to descend, a driving part can drive the locking rod to rotate, and thus the screw can be locked into the product. In the product collecting process, the locking head assembly is higher than the material collecting head, and the material collecting head can take away the product. Compared with the prior art, due to the fact that the Z-axis mechanism and the locking mechanism of the multifunctional multi-axis mechanical arm locking screw machine are organically combined with a mechanical arm, the locking rod penetrates through the front end of the mechanical arm, the structure is compact, the size is small, the weight is low, and manufacturing production cost is greatly reduced. Moreover, the product can be grabbed, carried and assembled, and economic benefits are increased.

The invention relates to a concave-convex dimpled heat transfer extrusion molding device. The device comprises cylinder barrels in staggered arrangement in a cylinder body, a piston rod is arranged in each cylinder barrel, a spring sleeves the piston rod, and an extrusion head is mounted on an end surface of the piston rod in an interference fit manner; a smooth pipe is arranged at the outer side of the extrusion head, and a concave-convex mold is arranged at the outer side of the smooth pipe. When the extrusion molding device is in work, the extrusion head extrudes the smooth pipe, and the extruded smooth pipe forms a cambered dimple; and meanwhile, a spherical boss of the concave-convex mold extrudes the smooth pipe in assistance, the extruded smooth pipe forms an indent dimple. The extrusion molding device disclosed by the invention has the effects that the piston rod is reset by use of the spring, the system structure is simplified, and the comprehensive manufacturing cost is lowered; and the extruded smooth pipe forms a concave-convex dimpled heat transfer pipe which is cambered and indent under the common effect of the extrusion head and the concave-convex mold. The problems of production and processing of the concave-convex heat transfer pipe are solved.

The invention discloses a novel antirust agent for marine machinery, which is prepared from raw material which comprises the following components in parts by weight: 200-400 parts by weight of sodium metasilicate, 8-14 of polymeric alkylol amine, 4-6 of sodium borate, 6-10 of disodium ethylenediamine tetraacetate, 2-6 of sodium citrate. The novel antirust agent for marine machinery provided by the invention, which contains sodium metasilicate as the main ingredient and is cheap and environmental friendly, can form a dense film on the surface of marine machinery and has notable antirust effect, especially under serious marine conditions.

The invention relates to the technical field of leather manufacturing chemistry and engineering and provides a manufacturing method for aroma type pattern leather. According to the manufacturing method for the aroma type pattern leather, three-dimension geometry patterns are manufactured on the surface of the leather through conventional leather machines and technologies, products high in utilization rate can be manufactured through low-grade raw material leather under the situation that other special equipment does not need to be increased, the utilization rate of the leather is increased, the quality of leather materials is improved, and resource waste is avoided. The manufacturing method for the aroma type pattern leather is simple in process step, convenient to operate and suitable for large-scale production and use.

The invention relates to a cooling heat-insulation device with temperature zones. The cooling heat-insulation device with the temperature zones comprises a heat-insulation box. The heat-insulation boxcomprises a first cabin and a second cabin which communicate with each other through a communication port. The first cabin is provided with a partition structure higher than the communication port and is divided by the partition structure in the height direction into an upper cabin body and a lower cabin body. A mechanism movement opening enabling the upper cabin body to communicate with the lower cabin body is formed in the partition structure. A cooling module is arranged in the arranged in the second cabin in the height direction. The cooling heat-insulation device has the technical effects that a relatively low-temperature storage environment is provided for biological samples, so that the biological activity of the biological sample is guaranteed; and the temperature zones in the heat-insulation box are realized through the first cabin body, the second cabin body and the partition structure, and an automatic system is located in a high-temperature area to make sure that mechanical parts and electrical parts of the automatic system are in the high-temperature area, so that special materials and special lubrication methods are not needed, and the manufacturing cost and the maintenance cost are reduced.

The invention provides a single-shuttle multi-needle overlocking apparatus, comprising a nose. A fixed block in circular shape is fixedly fitted to the lower portion of the nose, more than two vertically slidable sewing needles are fitted to the circular edge of the fixed block, a cam circular in shape is fitted to the upper portion of the fixed block and is fitted coaxially to a fitting block; the lower portion of the nose is provided with a horizontal sewing table, a needle plate is fitted on the sewing table, and the cam abuts and pushes the sewing needles during rotating to pass sequentially through the needle plate; the lower portion of the needle plate is provided with a horizontally fitted rotary shuttle coaxial to the fixed block, a thread hooking tooth of the rotary shuttle can sequentially hook sewing threads passed through a needle hole when rotating with the rotary shuttle. The single-shuttle multi-needle overlocking apparatus enables simpler transmission structure of an overlock machine and greatly reduced processing and assembly difficulty of the overlock machine, and manufacture cost and maintenance cost of the overlock machine can be decreased greatly.

The invention provides a hollow aluminum profile extrusion die and a processing method thereof, and relates to the technical field of aluminum profile production. The hollow aluminum profile extrusiondie comprises an upper die assembly, and the bottom side of the upper die assembly is provided with a lower die assembly. The inner side of the upper die assembly is provided with an outer die core assembly, and the inner side of the outer die core assembly is provided with an inner die core assembly. The hollow aluminum profile extrusion die is characterized in that the upper die assembly comprises an upper die frame; a positioning block is fixedly installed at the bottom end of the upper die frame; a positioning disc is fixedly installed at the upper end of the upper die frame; locking blocks are fixedly installed on the side face of the upper die frame; limiting holes are formed in the surface of the positioning disc at intervals, and limiting magnetic blocks are fixedly installed at the bottom ends of the inner sides of the limiting holes; and the outer die core assembly comprises an outer die core block fixedly installed on the inner side of the upper die frame. According to thehollow aluminum profile extrusion die and the processing method thereof, the extending position of an inner die core block on the outer die core block can be conveniently adjusted, the manufacturing and production requirements suitable for different aluminum profiles can be met, the production applicability of the extrusion die is improved, and the manufacturing and production cost of the aluminumprofiles of different specifications can be better reduced.