3973 results about "Molten metal" patented technology

A power generator is described that provides at least one of electrical and thermal power comprising (i) at least one reaction cell for reactions involving atomic hydrogen products identifiable by unique analytical and spectroscopic signatures, (ii) a molten metal injection system comprising at least one pump such as an electromagnetic pump that provides a molten metal stream to the reaction cell and at least one reservoir that receives the molten metal stream, and (iii) an ignition system comprising an electrical power source that provides low-voltage, high-current electrical energy to the at least one steam of molten metal to ignite a plasma to initiate rapid kinetics of the reaction and an energy gain. In some embodiments, the power generator may comprise: (v) a source of H2 and O2 supplied to the plasma, (vi) a molten metal recovery system, and (vii) a power converter capable of (a) converting the high-power light output from a blackbody radiator of the cell into electricity using concentrator thermophotovoltaic cells with plasma light recycling or (b) converting the energetic plasma into electricity using a magnetohydrodynamic converter.

The invention provides a low-speed and ultrahigh-pressure die-casting process method for automobile part die-casting, and relates to the field of automobile part manufacturing. The method includes the following steps that firstly, a mold is prepared, secondly, molten metal is prepared, thirdly, a casting is cooled and demolded, and fifthly, follow-up treatment is conducted. The defects that in the high-speed mold filling process of a common high-pressure casting technology, gas is likely to be involved in the molten metal, and consequently air holes, shrinkage porosity and the like are generated in the casting are overcome; and when key parts such as automobile engine cylinder bodies and hubs are produced, air hole defects possibly cause the problems of air leakage of engines, insufficient hub strength and the like. And meanwhile, for parts with thin walls and complex structures, uniform filling of molten metal in a mold is difficult to ensure by a traditional die-casting process, the defects of cold shut, insufficient pouring and the like are easy to occur, and the qualified rate and the production efficiency of products are reduced.

The embodiment of the invention provides a synthesis method and application of lithium sulfide. The synthesis method of the lithium sulfide comprises the following steps: providing a sulfur source and a lithium source; performing first treatment on the sulfur source to obtain sulfur vapor; performing second treatment on the lithium source to obtain molten metal lithium; and in an inert atmosphere, introducing the sulfur vapor into the molten metal lithium, and reacting to generate lithium sulfide. According to the synthesis method and application of the lithium sulfide provided by the embodiment of the invention, the sulfur source is converted into the sulfur vapor, the lithium source is converted into the molten metal lithium, and the gas-liquid out-phase reaction is carried out in the inert atmosphere, so that the reaction efficiency and the purity are improved, the process is simplified, the cost is reduced, and the high-purity requirement can be met; the purity can be improved through raw material pretreatment of sulfur steam and molten metal lithium, and the strict requirement of a solid-state battery for high-purity lithium sulfide is met.

The invention discloses a die-casting process parameter adjusting method and device, electronic equipment and a storage medium. The method comprises the steps that a current die in the die casting process is obtained, whether the current die is replaced or not is detected, and a die replacement detection result is obtained; according to the die replacement detection result, whether die-casting process parameters are adjusted or not is judged; when the die casting interruption is monitored, acquiring interruption duration; according to the interruption duration, whether the die-casting process parameters are adjusted or not is judged; the real-time molten metal temperature is obtained; according to the real-time molten metal temperature, whether the die-casting process parameters are adjusted or not is judged; the real-time ladle casting frequency of the current casting is obtained; according to the real-time ladle casting times, whether the die-casting process parameters are adjusted or not is judged; and die-casting at least one casting by adopting the die-casting process parameters. According to the embodiment of the invention, the stability and production efficiency of die-casting products can be improved.

The invention belongs to the technical field of aluminum alloy casting, and relates to a gap type pouring system and method for a ZL205A alloy cylindrical casting. According to the diameter of the barrel-shaped ZL205A alloy casting, a certain number of gap type pouring gates are arranged on the outer side, vertical barrels of the gap type pouring gates are located on pouring gate pieces connected with cross-shaped annular transverse pouring gates, pouring gates for anti-gravity pouring are arranged on cross-shaped cross points of the transverse pouring gates, annular dead heads are correspondingly arranged at the top end of the barrel-shaped ZL205A alloy casting, and the cross-shaped annular dead heads are arranged at the top end of the barrel-shaped ZL205A alloy casting. The dead heads are connected with all the gap pouring gates, a chilling block is arranged between the two gap pouring gates corresponding to the outer side of the cylindrical ZL205A alloy casting, a chilling block is arranged at the bottom of the bottom end flange, a chilling block is also arranged at the bottom of the top end annular flange, and a gap pouring system is formed. According to the method, anti-gravity pouring molten metal is comprehensively utilized for stable mold filling, sequential solidification feeding is conducted under the gravity, the deformability of a casting mold is improved, and control over looseness, cracks and segregation defects of the ZL205A alloy cylindrical casting is achieved.

Disclosed in the present application are a dual-sided laser synchronous welding heat source model establishment method, a dual-sided laser synchronous welding heat source simulation method, a dual-sided laser synchronous welding system, and a medium. Firstly, combined heat sources each comprising a Gaussian cylindrical heat source attenuation model and a Gaussian surface heat source correction model are established, and a dual-sided laser synchronous welding heat source model is established by means of a rotating coordinate system; a three-dimensional geometric model and a three-dimensional mesh model of a T-joint are established; and the consistency between simulated molten metal morphology and an actual weld shape is used as a criterion for determining whether parameter settings of the dual-sided laser synchronous welding heat source model are rational, so as to obtain an optimal finite element simulation heat source model. By establishing two heat sources each obtained by combining a Gaussian cylindrical heat source attenuation model and a Gaussian surface heat source correction model, and symmetrically applying the two heat sources to two sides of a T-joint to act on the interior and surface of a weld, the present invention realizes the accurate simulation of a weld penetration zone in a T-shaped thin-plate weldment, and thus enables the prediction of residual stress and welding deformation during a design phase, thereby optimizing the welding process, improving the welding quality and efficiency, and reducing material waste and production costs.

The invention discloses a rapid development method and system for a high-performance nodular cast iron material based on electronic metallurgy, and relates to the technical field of electronic metallurgy, and the rapid development method comprises the steps that a high-performance nodular cast iron raw material is smelted through multi-stage electron beams, and uniform molten metal is obtained; monitoring the chemical components and temperature change of the molten metal in real time, and dynamically adjusting the addition of the spheroidizing agent; the pouring speed and pressure of the molten metal subjected to spheroidizing treatment are intelligently controlled, and casting pouring is conducted; the internal stress change of the casting is monitored in real time through an embedded stress sensor, and the casting cooling process is adjusted; the cooled casting is subjected to surface treatment, heat treatment and machining; component detection and performance testing are conducted on the casting obtained after treatment and machining are completed; through the multi-stage electron beam melting technology, accurate control over the temperature and chemical components of the molten metal is achieved, and the uniformity and stability of the molten metal are ensured.

The invention discloses a crankshaft marking machine, which relates to the technical field of marking machines and comprises a supporting seat, a mounting assembly is arranged at the top of the supporting seat, a rotating assembly for transferring a crankshaft is arranged on the mounting assembly, a supporting plate is fixedly connected to the top of one side of the supporting seat, and a laser marking machine for marking the crankshaft is arranged at the top of the supporting plate. A cleaning assembly for collecting sweeps generated in the marking process is arranged on one side of the laser marking machine. According to the crankshaft marking machine, under the elastic acting force of a third damping spring, an arc-shaped clamping block can be tightly attached to the surface of a crankshaft, stable clamping is achieved, the stability of the crankshaft in the marking process is guaranteed through the clamping mode, marking quality reduction caused by vibration or shaking is reduced, and marking reliability and safety are further improved; and the crankshaft can be effectively vibrated through reciprocating knocking of the knocking rod, so that tiny sweeps or molten metal particles generated in the laser marking process fall off from the marking groove, and a marking area is kept clean.

The invention relates to the technical field of die casting, in particular to a feeding and injection device of a die casting machine. Comprising a charging barrel, a punch, an injection rod, an injection oil cylinder, a charging barrel sealing plate, a liquid inlet pipe and a driving part, the charging barrel is arranged in the fixed plate, the injection oil cylinder is arranged below the fixed plate, a punch is arranged in the charging barrel, a sealing plate is arranged on the side edge of the charging barrel, a guide structure is arranged on the sealing plate and matched with the charging barrel, a driving component is arranged on the bottom side of the sealing plate and fixed to the fixed plate, and the sealing plate moves under the action of the driving component. A charging barrel opening in the side surface of the charging barrel is opened and closed. When the sealing plate is in an open state, molten metal in the liquid inlet pipe begins to enter the charging barrel through the opening, the sealing plate closes the side opening of the charging barrel, the punch presses the molten metal into a mold cavity under the action of the injection oil cylinder, and a die-casting product is obtained after cooling forming. By adopting the opening and closing mode of the sealing plate, the time or the cooling degree of molten metal in the charging barrel is reduced, the feeding precision and efficiency are improved, and the injection period is shortened.

The invention discloses special protective clothing capable of preventing molten metal from splashing and application of the special protective clothing. The special protective clothing comprises a fireproof coat and a fireproof knitted underwear, the fireproof coat is a one-piece fireproof coat, and the fireproof knitted underwear is a fireproof knitted long-sleeve underwear; the fireproof coat is made of an anti-splashing fabric, and the anti-splashing fabric comprises a flame-retardant layer, an aerogel heat insulation layer and a base layer from outside to inside; the flame-retardant layer, the aerogel heat insulation layer and the base layer are bonded into the anti-splashing fabric by adopting a full-thickness puncture sewing process; the fireproof knitted underwear is made of non-combustible fiber, flame-retardant fiber and antistatic fiber blended fabric. The protective clothing has multiple functions, the fireproof coat and the fireproof knitted underwear both have permanent flame-retardant protective performance, can be used independently and can be worn according to different special operation scene requirements, the comprehensive utilization performance of the protective clothing is improved, and the purpose of reducing the use cost is achieved.

A furnace vessel of an arc furnace is loaded with solid metal. Afterward, an energy supply device of the arc furnace feeds electrical energy to electrodes of the arc furnace via a furnace transformer to form arcs between the electrodes and the metal, the arcs melting the metal. Finally, the molten metal is removed from the furnace vessel. The number of electrodes is at least three. For at least two of the electrodes, the energy supply device individually sets the operating frequency (fa, fb) of the relevant electrode. The current (Ic) through the third electrode is defined by the current (Ia, Ib) through the first and the second electrodes. Which of the electrode is the first electrode, which is the second electrode, and which is the third electrode is assigned dynamically.

The invention discloses a die-casting machine injection speed control method and system based on artificial intelligence, and relates to the technical field of die-casting process control. Performing time-space domain feature extraction on the multi-dimensional data by using a deep learning model, and analyzing the filling state, the flowing path and the ideal injection speed of the molten metal based on the time-space domain features; according to the filling state and the flowing path of the molten metal and in combination with the ideal injection speed, a thermal field imbalance area in the mold is recognized; according to the thermal field imbalance area in the die, the operation state of the die-casting machine is adjusted in real time, and die temperature distribution and the flowing speed of molten metal are obtained; adjusting the injection speed of the die-casting machine in real time according to the temperature distribution of the die and the flowing speed of the molten metal; according to the method, the time-space domain features of the multi-dimensional data are extracted through the deep learning model, the filling state and the flowing path of the molten metal are accurately analyzed, the injection speed is adjusted in real time, and the quality consistency of the die casting is remarkably improved.

The invention discloses a coaxial composite laser welding method and a welding method of a flat wire motor winding, and relates to the technical field of laser welding, coaxial composite laser beams are adopted to act on the surface of a high-reflection material to form a welding pool, the coaxial composite laser beams comprise an outer ring laser beam and a core laser beam, the outer ring laser beam is a pulse laser beam, and the core laser beam is a core laser beam; the core laser beam is a continuous laser beam, the continuous laser beam forms a main molten pool, the pulse laser beam forms an auxiliary molten pool, and the main molten pool and the auxiliary molten pool have overlapped parts. The continuous laser and the pulse laser are combined, the main molten pool formed by the continuous laser and the auxiliary molten pool formed by the pulse laser are communicated in an overlapped mode, the pulse laser disturbs molten metal in the auxiliary molten pool and drives the molten metal in the main molten pool to achieve the oscillation stirring effect, and the laser energy absorption efficiency of the high-reflection material can be improved; and the energy distribution of the heat source can be optimized by adjusting the energy proportion and the focus point position, the energy state of the heat source is accurately controlled, and zero splashing is achieved.

The invention discloses a treatment method for increasing the boiling speed after self-opening failure of a molten metal pouring nozzle, and belongs to the technical field of metal pouring. The treatment method comprises the steps that S1, after pouring residues are discharged, the inner surface of a container is cleaned; s2, when the risk that melt residues fall into an inner cavity of the seating brick exists in the hoisting process of the container, a protective cover is additionally arranged on the seating brick, and then the seating brick is fully covered; otherwise, directly executing S4; s3, when the container is transferred to the stuffing sand adding position, a water opening protection cover is removed through a sand adding funnel pipe part; s4, a metal wire is put into an inner cavity of the brick cup, and when casting is started through follow-up oxygen burning, the metal wire is burnt in oxygen to enable blockages to be rapidly melted; and S5, stuffing sand is added into the inner cavity of the seating brick through a sand adding funnel, the inner cavity of the seating brick is completely filled with the stuffing sand, the opening of the seating brick and the metal wire are completely covered, and the container is put into use after being treated. According to the invention, the boiling speed after the self-opening failure of the nozzle can be obviously improved, so that the harm of the self-opening failure of the nozzle to the production rhythm and the product quality is reduced.

The invention relates to the technical field of die-casting devices, in particular to a die-casting device and a die-casting method for a high-toughness light-weight aluminum alloy structural member. The upper die, the lower die and the metal tank filled with molten metal are respectively arranged on the die-casting frame; the synchronous transmission mechanism is arranged in the die-casting frame and connected with the upper die, the lower die and the metal tank, and the synchronous transmission mechanism and the horizontal reciprocating conveying mechanism share the same motor for driving; the pretreatment mechanism comprises a heating frame, a release agent spraying frame and an air drying frame. The whole system is driven by one power source, the production cost is effectively reduced, the operation difficulty is reduced, the subsequent maintenance and control work becomes easier, the power source has high universality and easy replaceability due to the adoption of an electric driving mode, and the power source is suitable for large-scale popularization and application. And the maintenance efficiency and the availability of the equipment are greatly improved.

The large valve casting casting device comprises a workbench, a working plate is arranged above the workbench, and the two sides of the top end of the working plate are each provided with a pair of sliding bases. In the prior art, when molten metal in a casting furnace is poured into a pouring opening of a mold, distance control and rotation of a furnace body need to be considered, and once the control of the factors is not accurate, the molten metal in the casting furnace is prone to being sprayed out of the furnace body and the pouring opening of the mold; and on one hand, the valve casting efficiency of the device is reduced, and on the other hand, the problem that workers are scalded easily due to splashing of scattered molten metal is solved. The device has the advantages that the possibility that molten metal in the furnace body is sprayed out of the guide funnel is reduced, it is ensured that more molten metal flows into the guide funnel, the casting efficiency of the device is guaranteed, and meanwhile the safety of using the device by workers can be improved.

The invention relates to the technical field of casting pouring, in particular to a pouring device and technology for improving casting pouring ceramic core deviation, the pouring device comprises a casting ceramic mold shell and a support, a necking opening is formed in the middle of the casting ceramic mold shell, and a ceramic plug is arranged in the casting ceramic mold shell; a conveying assembly, a discharging assembly and a heat preservation assembly are arranged on the upper side of the support, the conveying assembly comprises two first rotating shafts, the two first rotating shafts are rotationally connected to the left side and the right side of the support respectively, and first gears are fixedly connected to the rear ends of the two first rotating shafts; according to the scheme, the pipeline path on the lower side of the necking opening is blocked through the ceramic plug, then the flowing path of molten metal in the ceramic plug is changed through the process mode of blocking the middle column pipe, the flowing direction of the molten metal is shown in the figure 2, and the situation that in the pouring process, due to the fact that the molten metal is high in flowing speed and impact pressure is increased, the ceramic core cannot bear pressure, and the pouring quality is affected is avoided. And the problem of core shift is solved.

The invention provides a sand mold casting automatic pouring device which comprises a steel ladle and a conveying roller assembly, the output end of the conveying roller assembly is connected with one end of a movable frame, the steel ladle is in sliding connection with the inner side wall of the movable frame in the length direction of the movable frame, and a locking mechanism is arranged on the movable frame; under the action of the locking mechanism, the steel ladle stops moving and is locked through the locking mechanism, the steel ladle and the locking mechanism are driven by the driving assembly to slide towards the other end of the movable frame, after the steel ladle slides in place, the overturning air cylinder pushes upwards to drive the movable frame to overturn, and the steel ladle inclines downwards synchronously along with the movable frame. The pouring of molten metal liquid in the steel ladle is realized; the whole process is high in automation degree, direct pouring operation through manual operation is avoided, the whole pouring process is more stable, and the pouring quality can be improved.

The invention discloses a method for preparing a lithium-copper composite negative electrode by utilizing lithium slag and application, and the preparation method of the negative electrode comprises the following steps: adding the lithium slag with certain concentration after removing impurities such as Ca < 2 + >, Mg < 2 + > and Fe < 3 + > through acid treatment into metal lithium in a molten state, and fully stirring until the reaction is complete; and coating the molten metal lithium obtained after the reaction on a current collector to obtain the modified lithium metal negative electrode plate. The prepared lithium-copper composite negative electrode has a lithium-loving 3D frame structure, volume expansion in the circulation process can be inhibited, lithium oxide, lithium aluminum alloy and lithium silicon alloy existing on the 3D frame structure can serve as lithium-loving sites for uniform lithium ion deposition, lithium dendrite growth is inhibited, and long-term stable circulation of the lithium metal negative electrode is promoted.

The invention relates to a gasification method based on molten metal, belongs to the technical field of recycling of recyclable and renewable resources such as household garbage, industrial garbage and biomass, and solves the problem that same-quality or high-quality utilization cannot be realized due to incomplete decomposition of macromolecular organic matters in the prior art. Secondary pollution to the environment is caused, and the like. According to the gasification method based on the molten metal, the molten metal serves as a medium and a heat source, a material containing a high-molecular compound is subjected to a decomposition gasification reaction under the action of a gasification agent, and inorganic mixed gas including CO and H2 is generated. The same-quality and high-quality reutilization of recyclable and renewable resources such as household garbage, industrial garbage and biomass is realized.

The invention relates to the technical field of metal casting, and discloses casting equipment for a GIS conductor and a casting method.The casting equipment for the GIS conductor comprises a mounting frame, a casting motor arranged at the bottom of the mounting frame, a protective cover arranged at the top of the mounting frame, an upper mold arranged in the middle of the mounting frame and a lower mold arranged at the bottom of the upper mold; the injection port is formed in the top of the upper die, the rotating rod is arranged at the bottom of the lower die, the baffle is arranged on one side of the top of the protective cover, and the rotating disc is arranged at the bottom of the rotating rod; the liquid pouring part comprises a driving assembly arranged at the bottom of the baffle. And through automatic pouring of the molten metal, the time and cost of manual operation can be greatly reduced, and therefore the efficiency of the whole production process is improved. And the product quality is guaranteed, it is guaranteed that molten metal is accurately poured into the needed position, and the product quality problem caused by human factors is avoided.

The invention discloses vacuum die-casting equipment and a die-casting method for producing an engine front cover, and relates to the field of die-casting equipment. In the process that the injection assembly injects molten metal into the cavity, the injection assembly drives the ejection assembly to store force through the transmission assembly, when the cavity is about to be filled with the molten metal, the transmission assembly drives the locking assembly to release limiting of the ejection assembly, and at the moment, the ejection assembly drives the sealing plug to rapidly eject upwards; the sealing plug is arranged in the sealing groove, so that the sealing plug is quickly sealed and clamped in the sealing groove, the vacuumizing guide groove is closed and sealed, through quick closing and sealing of the vacuumizing guide groove, in the process that molten metal is injected into the cavity, the vacuumizing guide groove is in an open state, and the cavity is vacuumized continuously, so that the vacuumizing effect on the cavity is improved, and the production efficiency is improved. And meanwhile, through quick sealing of the vacuumizing guide groove, molten metal can be prevented from entering the vacuumizing guide groove and subsequent vacuumizing equipment.

The utility model provides a production system. The production system is used for producing the porous metal material. The production system comprises a container containing molten metal and comprising an opening; the ventilation device comprises an air channel, the air channel is configured to allow target gas to pass through, and a plurality of through holes are formed in a target area of a target section of the ventilation device; the discharging device comprises a discharging channel extending in the vertical direction.

The invention discloses a die-casting device and a die-casting method for automobile die castings, and particularly relates to the technical field of die casting machining, the die-casting device comprises a die-casting table and a plurality of die-casting molds, a die-casting machine is installed at one end of the die-casting table, and the die-casting machine is used for injecting molten metal into the multiple die-casting molds; the rotation assembly is used for driving the multiple die-casting dies to rotate on the die-casting table and moving the multiple die-casting dies to the position below the die-casting machine. The rotation assembly comprises a mounting frame which is mounted at the top end of the die-casting table and communicates with the interior of the die-casting table, two discharging grooves which are symmetrically formed in the top end of the mounting frame, communicate with the interior of the die-casting table and allow the die-casting die to slide, and a connecting ring rotationally mounted in the die-casting table. According to the die-casting mold disclosed by the invention, through the arrangement of the alternating assembly, a plurality of die-casting molds can be alternately arranged in the mounting frame and the die-casting table, so that when one die-casting mold is used, the other die-casting mold can be sufficiently cooled, and the downtime caused by mold replacement can be effectively reduced.

Disclosed in the present invention is a direct-pressure balance die locking device, which comprises a fixed die plate, a movable die plate and a rear die plate. The movable die plate and the rear die plate are slidingly arranged on a frame and are connected to the fixed die plate by means of a group of pull rods. A direct-pressure balance locking mechanism is arranged between the rear die plate and the movable die plate. The direct-pressure balance locking mechanism comprises a high-pressure oil cylinder assembly and a balance locking assembly which are arranged in a split mode, the high-pressure oil cylinder assembly being arranged on the rear die plate and providing a direct-pressure die locking force, and the balance locking assembly being arranged on the movable die plate so as to provide a radial balance locking supporting force for the high-pressure oil cylinder assembly. The distribution position of the high-pressure oil cylinder assembly on the rear die plate and the connecting positions of the pull rods on the rear die plate are staggered. Also disclosed is a die-casting machine. During a die locking process, the direct-pressure balance die locking device enables die plates to be uniformly stressed and conveniently adjusted, and a small diameter design for cylinders can be achieved while the locking force is kept unchanged, thereby avoiding oil leakage and achieving low cost and wide applications. The present invention can be widely applied to production and processing of metal die-casting for molten metals at a high temperature of 700-800℃.

The invention provides a control operation method for a discharge robot of a rare earth metal electrolytic furnace, which comprises the following steps: the discharge robot acquires the electrolytic state of the electrolytic furnace through a visual sensor, and judges whether the electrolytic state reaches a discharge standard or not; after it is judged that the discharging standard is met, a discharging robot grabs a discharging tool, the discharging tool is preheated, and the discharging tool is moved to the discharging position to prepare for discharging; the discharging robot moves along the planned path, the contact force between the robot and the electrolytic furnace is monitored through a force sensing system, the track of the robot is corrected according to the contact force, and the discharging process is executed; after the discharging process is finished, whether discharging continues or not is judged, and if not, the process is finished. The molten metal discharging standard is judged in real time through the visual sensor, the position of the furnace opening is dynamically calibrated, tool deformation is monitored, flexible control over the tail end is achieved through the force sensor, damage to the furnace body in the digging operation is avoided, manual participation is reduced, and the operation efficiency is greatly improved.

The invention provides a casting and forging composite forming method and die for an aluminum alloy structural part. A certain downward pressing amount is reserved for a male die; the cavity is filled with the metal melt at a certain speed under the pushing of the injection punch; increasing the pressure of the punch and maintaining the pressure (indirect extrusion casting); the pressurizing pin is started to carry out local pressurizing feeding; and the male die moves downwards by a certain distance, high pressure is applied, and closed die forging is conducted on the casting in the semi-solidified state. The mold structure comprises a shell part, a forming part, a flash storage and exhaust part, a pouring system, a temperature adjusting and monitoring system and a demolding system. The extrusion casting process and the closed die forging process are integrated in one set of die and are achieved through the extrusion casting machine, the performance of a final product is better than that of an extrusion casting method, the forming process is easier to achieve compared with forging, meanwhile, the production cost is lower, and the method is particularly suitable for forming machining of high-performance safety parts, structural parts and complex parts.

The present invention relates to a method for molten metal pyrolysis of hydrocarbons to produce hydrogen gas and carbon. Liquid salt is used to separate produced carbon from the molten metal and to facilitate isolation of produced carbon.

The invention discloses a manufacturing method of 925 silver jewelry, which comprises the following steps: S1, preparing alloy components, S2, designing a cast tree structure, S3, casting, and S4, densifying a casting, the alloy components comprise 92.5-93.0% of silver, 1.0-3.0% of platinum, 0.05-0.5% of copper, 1.5-3.5% of zinc, 1.5-3.5% of indium, 0.03-0.3% of tin, 0.05-0.5% of germanium, 0.03-0.3% of rare earth, and 0.003-0.02% of boron. According to the manufacturing method, alloy components are optimized, the casting performance of the alloy components is improved, the casting process is optimized, the feeding capacity of molten metal is improved, shrinkage porosity and air holes are reduced, the initial density of the casting is improved, and subsequent composite treatment is carried out, so that the density from the surface to the shallow surface of the casting is further improved, grains are refined, and the surface roughness is further reduced; and the requirement of high brightness of the jewelry surface is met.

The utility model relates to the technical field of laser cutting, and discloses a thin metal plate laser cutting machine which comprises a laser cutting head, an installation support is installed on the outer wall of the laser cutting head, a small motor is installed at the end, away from the laser cutting head, of the installation support, and a power gear is installed at the output end of the small motor. According to the thin metal plate laser cutting machine, the position, located on the outer side of the laser cutting head, of the surface of a metal plate is polished through rotation of the polishing piece, residual molten metal on the surface of the metal plate is polished through polishing of the polishing piece, and therefore the smooth effect of the surface of the metal plate at the cutting position is improved, and the cutting quality is improved; and through cooperation of an inner adsorption magnet and an outer adsorption magnet, chippings generated by polishing are adsorbed, and the situation that the metal chippings generated by polishing are left on the surface of a plate, additional cleaning work needs to be conducted, and the subsequent laser cutting quality can be affected when the metal chippings are left on a cutting route is prevented.