1850 results about "Molten metal" patented technology

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 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 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 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 invention discloses a smelting process monitoring system of a medium-frequency electric furnace and a process guidance method of the smelting process monitoring system. The system comprises an edge acquisition terminal and a cloud platform, the edge acquisition terminal comprises an intermediate frequency voltage transmitter used for acquiring a voltage signal at the output side of the intermediate frequency electric control cabinet and converting the voltage signal into a first analog signal; the intermediate-frequency current transmitter is used for collecting a current signal at the output side of the intermediate-frequency electric control cabinet and converting the current signal into a second analog signal; the analog quantity conversion module is used for converting the first analog signal and the second analog signal into digital signals; the intelligent thermodetector is used for measuring the temperature of the molten metal in real time and sending temperature data; the cloud platform is used for receiving and processing the digital signal and the temperature data and storing high-frequency sampling data; identifying a smelting stage through an LSTM network; power control is optimized on the basis of a Transform model and a GAN model; and integrating an expert knowledge base and providing process guidance. According to the system, comprehensive digitization and real-time accurate sensing of the smelting process are achieved; and the timeliness and scientificity of decision making are improved.

The invention relates to the technical field of rare earth metal hydrometallurgy, in particular to a rare earth molten salt electrolysis truss type multifunctional metal output system and a control method.The system comprises a main body supporting and moving frame, an integrated function execution module set, a bottom cleaning function module, an electrolytic bath station unit and an intelligent control system; wherein the integrated function execution module group, the bottom cleaning function module, the electrolytic tank station unit and the intelligent control system are respectively arranged in the main body support and motion frame, and the main body support and motion frame is arranged in a gantry truss structure; the four functions of pot lifting, casting, cooling and bottom cleaning in rare earth electrolysis are integrated on the integrated bearing platform of the same gantry truss type rack, and through multi-sensing information fusion and intelligent control, the system can automatically complete the whole process operation of crucible extraction, molten metal casting, cooling forming and electrolytic bath bottom cleaning; and the exposure of workers in high-temperature and high-risk environments is obviously reduced, and the production safety and efficiency are improved.

The invention relates to a casting method for a low-pressure alloy casting of a riser-free sand mold. The casting method comprises the steps that molten alloy is injected into a casting cavity through a plurality of flow gates in the bottom of the casting cavity in a low-pressure mode for mold filling; during mold filling, the variable-diameter air outlet needle arranged above the casting cavity is used for exhausting air; after mold filling is completed, stepped pressurization and pressure maintaining are conducted on the molten metal in the casting mold cavity; and when the casting is solidified, the thick and large part at the top of the casting cavity is cooled in an accelerated manner, so that the casting is solidified from bottom to top and from the thin-wall area to the thick-wall area. Through bottom multi-pouring-gate mold filling and top variable-diameter gas outlet needle gas exhausting, splashing is prevented. And step pressurization and pressure maintaining are carried out after mold filling, and a thick-wall area is forcibly fed. During solidification, solidification is formed from bottom to top and from thin to thick. A riser is replaced with pouring gate feeding, precise exhaust and solidification control are combined, the feeding and exhaust problems of riser-free casting are solved, riser cutting and polishing are avoided, and meanwhile it is guaranteed that a casting is compact and high in quality.

The invention relates to the technical field of casting molds, and discloses an automobile planet carrier casting mold which comprises a mold plate arranged between an upper mold and a lower mold, an upper sand mold, a lower sand mold, a sand core and a sprue are installed on the mold plate, and the sand core is located between the upper sand mold and the lower sand mold and used for blocking cavity communication of the upper sand mold and the lower sand mold; guide columns corresponding to the upper and lower dies are mounted on the upper and lower end faces of the template, and are inserted into guide holes of the upper and lower dies, so that accurate die assembly is realized. Through combination of the upper sand mold, the lower sand mold and the sand core, the mold can mold an upper casting and a lower casting at the same time by using the sand core to block communication of the mold cavity, the production efficiency is greatly improved, the thickness of the sand core is set to be 0.8 times of the wall thickness of the casting, shrinkage porosity linearity caused by a hot spot in the casting can be avoided, and meanwhile, the production efficiency is improved. The pouring gate supplies liquid to the upper sand mold and the lower sand mold through the residue filter, impurities in molten metal are removed through the filtering assembly, the shrinkage porosity defect caused by the impurities is reduced, and therefore the qualification rate of castings is increased.

The invention discloses a molten metal fluidity improving method and system in the V-method casting process, and relates to the technical field of casting, a high-pressure airflow and mechanical brush composite mode is adopted for cleaning a casting mold cavity and preheating the casting mold cavity, and precoated sand is selected for preparing a sand mold through vacuum negative-pressure compaction; a sectional type negative pressure regulation and control strategy is adopted, and the stepped composite pouring gate structure is optimized; degassing the molten metal by argon or nitrogen, controlling the temperature, and adding an inoculant and a flow promoter in proportion; the casting speed is controlled according to the three-section type rate through the casting table with the adjustable inclination angle; arranging an insulated riser at the thick and large part of the casting, maintaining a negative pressure field after casting, and covering an insulating material; dividing cooling areas according to wall thickness, and gradually relieving pressure after cooling to a set temperature; and after shot blasting and flaw detection, recording data and establishing a process parameter-flowability association database. Through mold preheating, negative pressure gradient regulation and control and pouring gate design improvement, the molten metal fluidity is remarkably improved, and the casting quality stability and the production efficiency are greatly improved.

A device that may be a valve or a pinch valve is disclosed. The device includes at least the following components: (1) a flexible sleeve and (2) two end connection ports that are located on opposite ends of the flexible sleeve. The device may also include one or more of the following: an actuator, a body or housing, and a heating element. The flexible sleeve is capable of having the high-temperature material flowed therein and being in direct contact with the flexible sleeve. The high-temperature material is a material at a temperature above 200° C. For example, the high-temperature material may be a molten material in a casting process. A method of using the device is also disclosed. The method involves, at least, the following steps: (1) providing a flexible sleeve, and (2) flowing a high-temperature material into the flexible sleeve. The steps may be part of a casting process involving molten material, such as molten metal or molten metal alloy. The flexible sleeve may be provided as part of a device, such as a valve or pinch valve.

The invention discloses a yielding crystallizer for an electroslag smelting casting three-dimensional variable curved surface casting and an electroslag smelting casting method, and belongs to the field of electroslag smelting casting. The receding crystallizer comprises a crystallizer body formed by combining a plurality of crystallizer blocks, internal molded surfaces of the crystallizer body are combined to form a crystallizer cavity, and the crystallizer cavity is used for containing molten metal and forming a casting with a three-dimensional variable curved surface; the receding structure is arranged on at least one crystallizer sub-block and is configured to allow the crystallizer sub-block to move in the preset direction in the solidification and shrinkage process of the casting so as to avoid shrinkage deformation of the casting; and the slag stopping structures are arranged between the adjacent crystallizer blocks and are used for sealing gaps generated by displacement after the crystallizer blocks are subjected to yielding displacement, so that slag leakage is prevented. The receding crystallizer can automatically receding when hindering deformation of a casting, space needed by metal shrinkage is provided in the electroslag casting process, and the finished product quality of the casting in the complex shape is improved.

The invention provides an anti-gravity casting device and technology for a metal-based composite foam material, the anti-gravity casting device comprises a casting forming system, a melt liquid lifting system and a metal smelting system, the casting forming system comprises an upper furnace chamber, a mold is arranged in the upper furnace chamber, a ceramic hollow ball is arranged in the mold, and the melt liquid lifting system comprises a liquid lifting pipe and a lifting device; the metal smelting system comprises a crucible and a lower furnace chamber, molten metal is arranged in the crucible, the mold and the crucible are communicated through the liquid rising pipe, and the lifting device is connected with the upper furnace chamber and the lower furnace chamber. And the molten metal overcomes the gravity of the molten metal and permeates into the ceramic hollow ball stack from bottom to top, and the metal-based composite foam material with the hollow ball reinforced particles evenly distributed is obtained. According to the casting method, most of residual gas in gaps of the hollow balls can be removed, defects in castings are reduced, and the mechanical property of the composite foam can be improved.

The invention belongs to the technical field of additive manufacturing, and discloses an ODS alloy with dispersively distributed nano oxide and a preparation method of the ODS alloy, and the prepared rare earth nano oxide with a core-shell structure and coated with a metal simple substance improves the wettability of the nano oxide in molten metal, so that the wettability of the nano oxide in molten metal is improved. And meanwhile, rare earth oxide can be prevented from reacting with elements in steel to change chemical components. The size of nano particles in the prepared ODS alloy can be controlled to be 20 nm or below, the nano particles are distributed in a dispersed mode, the number of the nano particles is large, and performance improvement of the ODS alloy is facilitated.

The invention belongs to the technical field of battery resistance welding, particularly relates to an automatic cleaning and recycling device for welding slag in the battery resistance welding process, and aims to solve the problems that the welding slag after splashing and melting is easy to adhere to the surface of a battery to form hard residues after being cooled, so that the welding slag cannot be cleaned and collected easily. A sliding groove fixing frame is fixedly connected to the upper portion of the resistance welding tool table. The control box is arranged below the resistance welding tool table, a limiting rail is slidably connected to the sliding groove fixing frame, and a lifting sliding seat is slidably connected to the interior of the limiting rail; the welding air cylinder is fixedly connected to one side of the limiting rail. The automatic cleaning and recycling device for the welding slag in the battery resistance welding process has the effects that splashing molten metal is blocked, meanwhile, hard residues are prevented from being formed on the surface of a battery module due to cooling of the molten metal, and cleaning and collecting of the welding slag generated in the battery resistance welding process are facilitated.

The invention discloses a high-purity material pulverizing and conveying system, which belongs to the technical field of metal pulverizing and comprises a pulverizing production line, a conveying production line and a material storage tank. The pulverizing production line comprises a high-temperature smelting furnace and a pulverizing crucible; an automatic sealing cover is arranged at the top of the high-temperature smelting furnace, a smelting cavity of the high-temperature smelting furnace is connected with a nitrogen tank through a nitrogen pipe, and melt in the high-temperature smelting furnace is discharged into the powder preparation crucible through a heating type discharging pipe; the conveying production line comprises a powder recycling unit and a vacuum feeding machine. The high-temperature smelting furnace is filled with nitrogen and oxygen is isolated, the problem of oxidation of metal in the smelting process is greatly reduced or avoided, oxide floating and gathering are further avoided, the problem that a discharging pipe is blocked due to material blocking caused by oxide floating is solved, meanwhile, material output is constant through air pressure, and the production efficiency is improved. The discharging mode instead of a traditional mode of using a discharging valve is adopted for discharging, the problem that production is out of control due to the fact that high-temperature metal corrodes a control element of the discharging valve is thoroughly solved, the material output stability is high, and the production quality is improved.

The invention relates to the technical field of metal surface coating preparation, in particular to a high-temperature thermal cycle impact resistant yttrium oxide composite coating on the surface of refractory metal and a preparation method of the yttrium oxide composite coating. The refractory metal composite coating material is composed of a refractory metal matrix and a coating. The coating comprises a bonding layer, a middle layer and a surface layer which are arranged in a contact manner; the bonding layer is composed of the refractory metal and yttrium oxide, and the porosity of the bonding layer is 1%-5%; the middle layer is a pure yttrium oxide layer with the porosity of 5%-10%; the porosity of the surface layer is 1t; 2% of a pure yttrium oxide layer; the melting point of the refractory metal is 2470 DEG C or higher. According to the refractory metal composite coating material and the preparation method and application thereof, the refractory metal coating structure is optimized, the porosity of the coating is further adjusted, the high-temperature molten metal corrosion resistance and the high-temperature thermal shock resistance of the coating are improved, meanwhile, the bonding strength between the coatings is guaranteed, and the service life of the coating is prolonged. The method is expected to be applied to high-melting-point metal smelting equipment.

The invention relates to a method for manufacturing a hollow turbine blade (10) for a turbine engine, the hollow blade (10) comprising a pressure side wall (16) and a suction side wall (18), an internal cooling channel (28) passing through the pressure side wall and the suction side wall, the invention relates to a method for manufacturing a blade (10), comprising at least a first moulding stage (PH1, PH '1) using a lost wax casting technique using molten metal, the first moulding stage (PH1, PH' 1) comprising at least one step b) of manufacturing a mould (34) made of a refractory material, the inner wall (36) of the mould being matched to the outer shape of the blade (10) to be manufactured, in which step b) the inner wall (36) of the mould (34) is matched to the outer shape of the blade (10) to be manufactured. A plurality of protrusions (52) are formed on an inner wall (36) of a mold (34) made of refractory material, the plurality of protrusions defining an outlet opening counter-shape (30) of an internal cooling channel (28).

The invention provides an induction melting feeding ultrasonic atomization pulverizing system and method, and belongs to the technical field of metal powder material preparation. The induction melting system is used for melting metal raw materials, generated metal melt is sprayed out through a nozzle and drips on an ultrasonic vibration workbench, inert gas is ionized through a tungsten needle electrode tip in the plasma electric arc melting system, the dripped melt which is not atomized in time and cooled is assisted to continue to be heated, and the molten metal is melted. Under the action of ultrasonic atomization vibration, the melt liquid level is broken to generate a molten pool. And under the action of ultrasonic waves, molten liquid in the molten pool is broken to generate small fog drops, and the fog drops are rapidly cooled under the action of surface tension in the inert gas environment to form the metal spherical powder. Continuous operation of ultrasonic atomization powder preparation can be achieved, the conditions of hollow powder and satellite powder are reduced, and the prepared metal spherical powder has the advantages of being high in sphericity degree (larger than or equal to 0.95), high in compactness (larger than or equal to 99%) and narrow in particle size distribution (smaller than or equal to 60 micrometers).

The invention belongs to the technical field of powder metallurgy, and particularly discloses a centrifugal atomization powder making device and method based on controllable airflow regulation, and the device comprises an atomization cabin, a vacuum control system, a bar driving unit, a plasma gun, a reverse airflow generation assembly, an inert gas supply system and a powder collector. The reverse airflow generation assembly comprises a plurality of nozzles which are uniformly distributed along the circumference of the bulkhead; according to the powder preparation method, molten metal atomization is achieved through electrode bar installation, vacuumizing and inert gas filling, electrode bar plasma melting and bar rotating propelling and reverse airflow jetting. Through the synergistic effect of'centrifugal force + controllable reverse airflow ', the diameter of the atomization cabin is reduced to be less than 2 m, the proportion of special-shaped powder is reduced to be less than 3%, the liquid drop cooling rate is increased by 1.5-2 times, high purity of powder, equipment miniaturization and process greenness are considered, the problems of low cooling efficiency, poor powder quality and the like of traditional centrifugal atomization are solved, and the method is suitable for industrial production. The method is suitable for preparing active metal high-end powder such as titanium alloy.

The utility model relates to a molten metal reaction kettle, 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 the same-quality or high-quality utilization cannot be realized due to the fact that macromolecular organic matters are not thoroughly decomposed in the prior art. Secondary pollution to the environment is caused, and the like. The molten metal reaction kettle comprises a first-stage molten metal reaction kettle, and the first-stage molten metal reaction kettle comprises a feeding port, a first gasifying agent spray gun mounting port and a second gasifying agent spray gun mounting port which are formed in the top of the first-stage molten metal reaction kettle, and a first metal pool arranged in the first-stage molten metal reaction kettle. The same-quality and high-quality reutilization of recyclable and renewable resources such as household garbage, industrial garbage and biomass is realized.

An electromagnetic stirring low-pressure casting pouring system (100) comprises a flask, a sprue (110), a runner (130), a mold cavity (150) and a riser (170) being formed in a core inside the flask, wherein the runner is arranged at a top end of the sprue and is in communication with the sprue, the runner is in communication with the mold cavity, the riser is in communication with the mold cavity, overflow ladles (190) are arranged on two sides of or around the sprue, and top ends of the overflow ladles are in communication with the top of the sprue and are located below the runner, such that molten metal in the sprue overflows to the overflow ladles during pouring, and sequentially flows to the runner, the mold cavity and the riser after the overflow ladles are filled. Also provided is electromagnetic stirring low-pressure casting pouring equipment comprising the pouring system. By means of the present electromagnetic stirring low-pressure casting pouring system, the additionally designed overflow ladles enable the collection of the initial molten metal, which contains a number of impurities, and provide effective filtration of the impurity-laden molten metal, thereby further ensuring the quality and properties of the casting.

The invention relates to an automatic guided vehicle for molten metal transfer and a working method, and belongs to the technical field of automatic transportation equipment. The vehicle comprises a mobile vehicle body, and further comprises a bag cover opening and closing device, a butt joint bearing part, a storage battery mounting assembly, a dust removal system, a navigation obstacle avoidance system and a control system which are arranged on the mobile vehicle body, and the bag cover opening and closing device is used for automatically opening or closing a bag cover; the butt joint bearing part is used for bearing an external container; the storage battery mounting assembly is used for locking a storage battery module on the mobile vehicle body in a releasable manner; the dust removal system is arranged close to the butt joint bearing part and is used for collecting smoke dust generated by the molten metal ladle; the navigation obstacle avoidance system is used for path navigation and obstacle detection of the automated guided vehicle; and the control system controls the mobile vehicle body to stop when the navigation obstacle avoidance system detects an obstacle. The automatic guided vehicle is flexible in operation, high in automation degree, safe and reliable.

The invention discloses a coating method and a coating device for coating superfine powder. The coating method comprises the following steps: S1, conveying original powder into gas-powder mixing equipment through a mixing pipeline; s2, a feeding unit in the gas-powder mixing equipment is started, meanwhile, an electric arc heating device is started, and the to-be-coated metal material is instantly melted through the high temperature of an electric arc; s3, the molten metal material to be coated forms atomized mixed liquid in gas-powder mixing equipment, and the atomized mixed liquid is conveyed into a collecting unit through spray holes; and S4, in a collecting unit, enabling the metal particles to be coated in the atomized mixed liquid to form a coated powder air mass, forming a coating or powder through deposition, and finally cooling and separating to obtain the coated ultrafine powder material. By adopting the coating method and the coating device, different types of metal materials or ceramic powder can be prepared, and the prepared coated ultrafine powder particles are controllable in particle size and high in purity, so that the application range of the ultrafine powder can be expanded.

The invention discloses a transmission shell die-casting die convenient to demould, and relates to the technical field of die-casting dies. Comprising a lower mold frame and an upper mold frame, four driving rods are fixed to the bottom of the upper mold frame, a moving groove is formed in the surface of the lower mold frame, a first sliding seat is slidably mounted in the lower mold frame, a knocking assembly is arranged on the side wall of the first sliding seat, and a vibration frame is arranged in the lower mold frame; a plurality of vibration blocks are symmetrically arranged on the side wall of the vibration frame, a rotating shaft is arranged on the side wall of the vibration frame, and a vibration assembly is arranged on the side wall of the rotating shaft; according to the invention, through the arrangement of the vibration frame, the vibration block and the vibration assembly, during die-casting operation, molten fluid in the die body is uniformly vibrated, the flowing speed of molten metal towards the far ends of the two sides of the shell is increased, and solute is promoted to be uniformly filled in the whole area of a complex cavity, so that the formed die has better appearance and longer service life; and the production qualification rate and the product consistency are improved.

The invention relates to the technical field of resonant pouring castings, in particular to a method for improving the homogeneity of castings in all directions based on resonant pouring, which comprises the following steps: preparing a mold / casting mold, setting resonant parameters, pouring molten metal, maintaining resonance and solidifying, and detecting the homogeneity. Through the resonance effect, molten metal mold filling is uniform, the size qualification rate is increased, meanwhile, grain refinement can be promoted, the isotropic performance uniformity and stability of a casting are remarkably improved, the internal defect rate is greatly reduced, the comprehensive yield is increased, and energy consumption and cost are reduced.

The anti-deformation casting technology comprises the following steps that S1, a mold is pretreated, specifically, a, a thick-wall area and a thin-wall area are recognized according to a casting three-dimensional model, and a high-heat-conduction material insert is embedded into the mold corresponding to the thick-wall area; a low-heat-conduction material insert is embedded into the mold corresponding to the thin-wall area; b, a casting mold is preheated to 180-250 DEG C, and an anti-burnt-on sand coating is evenly sprayed on the inner surface of the mold; s2, low-pressure mold filling pouring is conducted, specifically, molten metal liquid is injected into a mold in a low-pressure mold filling mode; s3, solidification and vibration aging treatment, wherein the thick-wall area of the casting is solidified to 50%-70%; and S4, demolding treatment is conducted, specifically, the casting is demolded, and the casting is transferred into an argon protection heat preservation furnace after demolding. Through the synergistic effect of differential cooling control, stepped pressurization solidification and directional vibration aging, micro plastic deformation can occur in the casting, residual stress is homogenized, the dimensional stability of the gray iron casting is further improved, and deformation of the gray iron casting is reduced.

An exhaust device for a vacuum die-casting mold includes a bushing, an ejection pin, and an exhaust pin. The bushing defines a sliding slot extending along an axial direction thereof. The ejection pin includes a head portion and an extension pin portion slidably inserted into the sliding slot. The extension pin portion cooperates with the bushing to define at least one exhaust groove extending along the axial direction in the sliding slot. The exhaust pin includes a head portion and a pin body portion. The head portion defines at least one vent groove extending along a radial direction thereof. The pin body portion defines at least one groove extending along an axial direction thereof. The head portion is pushed by molten metal and gas, and the at least one groove allows only gas to pass therethrough without allowing molten metal to pass therethrough. The passing gas is then exhausted to the outside through the at least one vent groove and the at least one exhaust groove, thereby avoiding the formation of pores on a die-cast product.

The utility model provides a sealing metal sheet, a battery monomer and a battery, and relates to the technical field of batteries. The sealing metal sheet is used for sealing a liquid injection hole of a battery monomer, the sealing metal sheet comprises a body, the body is provided with a first surface which is configured to deviate from the interior of the battery monomer, and the first surface is provided with a sinking table. By arranging the sinking table, the molten metal material which does not flow into the space between the sealing metal sheet and the cover plate can be guided to flow into the sinking table, so that the molten metal material is prevented from being accumulated at the periphery of the sealing metal sheet, the surface flatness of the sealing metal sheet after welding can be improved, and the welding stress is reduced. Thus, the structural uniformity of the sealing metal sheet can be improved, the stress state of the sealing metal sheet can be improved, and finally the welding quality between the sealing metal sheet and the cover plate can be improved.

The utility model discloses a full-automatic molten metal transferring and pouring system which comprises a track arranged between an electric furnace and a pouring chamber, the track comprises a first track arranged in front of the electric furnace, a second track arranged in front of the pouring chamber and a third track communicated with the first track and the second track, a transferring dumping car is arranged on the first track, and a transferring dumping car is arranged on the second track. A pouring truck is arranged on the second track, a transfer truck is arranged on the third track, molten metal in the electric furnace is transferred into a steel ladle of the transfer dumping truck, and the steel ladle is transferred between the transfer dumping truck and the pouring truck through the transfer truck. According to the system, full-automatic industrial processes such as molten metal receiving, transferring, pouring and liquid returning are achieved, personnel participation is reduced, and the safety of the whole technological process is improved.

The invention discloses a multi-sliding-block die structure for a box shell die casting and a die casting method thereof.The die structure comprises four sliding blocks which are located on the four side faces of the die structure correspondingly and used for achieving four-side touch-through forming; the interior of at least one sliding block is cut to form an inclined small sliding block, and the small sliding block and the sliding block form a nested core-pulling structure which is used for forming a reverse groove or hole rib structure on the side face; the feeding hole is formed in the upper die and is used for injecting molten metal from the upper part; and an inductor is configured and used for controlling the small sliding block to exit before the sliding block in the demolding process, so that graded demolding is realized. The problem that a traditional single sliding block cannot process a groove / hole forming an included angle with the main demolding direction or forming a reverse direction with the main demolding direction is solved, and demolding with deeper features is completed while lateral core pulling is achieved through the nested small sliding block; and the small sliding block is tightly matched with the sliding block, so that the size precision and the surface quality of formed fine structures such as reverse grooves and thin ribs are ensured.