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10208results about "Foundry patterns" patented technology

Sand mold 3D printer

The sand mold 3D printer relates to the technical field of casting molding, and comprises a box body, a workbench is arranged in the box body, a moving avoiding mechanism is arranged at the top of the box body, and cleaning and material collecting mechanisms used for cleaning a printing head are arranged on the front side and the rear side of the workbench correspondingly. The sanding device and the printing head respectively adopt two mutually independent and vertical driving parts as power, after the sanding device performs unidirectional sanding, the printing head performs continuous printing from front to back, after printing, the printing head moves to the position of the rear cleaning and receiving mechanism for avoiding, and then the sanding device performs reverse sanding, so that the printing efficiency is improved. The printing head conducts reverse continuous printing from back to front, two-way sanding and two-way printing are achieved, the sanding device and the printing head are free of idle stroke, the printing efficiency is high, when the printing head conducts avoiding, the pressure driving assembly drives the automatic cleaning assembly to scrape and clean glue liquid and gravel remaining at the bottom of the printing head, and therefore the printing efficiency is improved. And the bottom of the scraping plate is cleaned through the cleaning mechanism.
Owner:ASTAR INTELLIGENT MFG (JIANGSU) CO LTD

Raw materials of near-zero shrinkage silicon-based ceramic core and preparation method of near-zero shrinkage silicon-based ceramic core

ActiveCN119320268ANear zero shrinkage achievedHigh dimensional accuracyFoundry mouldsFoundry coresRefractorySlurry
The invention discloses a raw material of a near-zero shrinkage silicon-based ceramic core and a preparation method thereof, the raw material of the ceramic core comprises refractory material powder, zirconium silicate powder and metal zirconium powder, and the refractory material powder, the zirconium silicate powder and the metal zirconium powder are mixed according to the proportion to form the raw material of the ceramic core; ceramic core raw materials are added into liquid paraffin to form ceramic core slurry, the ceramic core slurry is used for obtaining a ceramic core biscuit through a hot-pressing injection molding method, and the ceramic core biscuit is subjected to powder burying sintering to obtain the ceramic core. Volume shrinkage generated in the sintering process of the ceramic core is made up through in-situ synthesis oxidation expansion of the metal zirconium powder, meanwhile, shrinkage of the ceramic core can be made up through generated zirconium dioxide due to the phase change effect, near-zero shrinkage of the silicon-based ceramic core in the sintering process is achieved under the dual effects of in-situ oxidation and the phase change effect, and the silicon-based ceramic core has the good sintering performance. Meanwhile, the generated zirconium dioxide improves the room-temperature bending strength and the high-temperature bending strength of the ceramic core.
Owner:SHANGHAI UNIV

Magnesium alloy heterogeneous flow integral coordination pouring process

The invention relates to the technical field of alloy pouring processes, in particular to a magnesium alloy heterogeneous flow overall coordination pouring process which comprises the steps of conducting pouring numerical simulation through simulation software, optimizing pouring design and determining a composite flow guide structure, a mold temperature control scheme and an alloy component regulation and control strategy. Magnesium alloy smelting and refining are conducted; preheating the mold by using an intelligent temperature control system; during the period, the intelligent temperature control system monitors and adjusts the temperature of the mold, and the online alloy adding system and the impurity adsorption filtering device keep the components of the melt uniform and pure; and after pouring is completed, controlling the mold temperature according to a preset cooling curve to slowly and uniformly solidify the melt. The design of the bionic branch-shaped flow dividing structure, the dynamic adjustable flow guide plate and the like reduces casting defects, and the casting forming quality is improved. And on-line alloy adding and impurity adsorption filtering ensure that melt components are stable, and the casting performance is improved.
Owner:巢湖宜安云海科技有限公司

Combined pump body shell casting mold and using method thereof

The invention relates to the technical field of machine shell casting, and discloses a combined pump body machine shell casting mold and a using method thereof.The combined pump body machine shell casting mold comprises a base, a telescopic rod is fixedly connected to the top of the base, and a mounting plate is fixedly connected to the end, away from the base, of the telescopic rod; when the first piston block moves upwards, the first piston block drives the second piston block to move upwards along the inner wall of the hydraulic cylinder through the fixing rod, so that a solution in the hydraulic cylinder enters the first hydraulic telescopic rod, and the first hydraulic telescopic rod extends outwards; a first hydraulic telescopic rod drives a cross-shaped blocking plate to slide downwards along the inner wall of a second fixing plate through a pulling frame, high-pressure gas in an exhaust groove can be sprayed out through a gap between the cross-shaped blocking plate and the second fixing plate, the high-pressure gas acts on the bottom of a shell, and gas demolding is replaced with the high-pressure gas; and the pressure on the outer wall during demolding of the shell is effectively reduced.
Owner:JIANGSU XINHAI SCI & TECH DEV CO LTD

Equipment for casting numerical control machine tool base

The numerical control machine tool base casting machining equipment comprises a forming mold and a casting ladle mechanism, and the forming mold comprises a mold body, a buckling mechanism, an exhaust mechanism and an air extraction mechanism; the casting ladle mechanism comprises a hoisting mechanism, a casting ladle body and a casting ladle driving mechanism. On the basis that casting machining is not affected, gas generated by thermal decomposition of organic matter in coated sand can be effectively and efficiently exhausted, and therefore the defects of air holes, pits and the like of castings are prevented; and the controllability of casting construction can be improved, so that the safety risk of casting construction is reduced.
Owner:LONGYAN UNIV +1

Preparation method of ceramic core for titanium alloy graphite mold casting

The invention provides a preparation method of a ceramic core for titanium alloy graphite mold casting. The preparation method comprises the following steps: step 1, designing a wood mold; step 2, wood pattern mold processing; thirdly, paint spraying is conducted on the wood pattern mold; fourthly, a release agent is sprayed to the wood mold; step 5, forming a wood module and sealing wax; sixthly, grouting and sand spraying are conducted on the working face of the wood pattern mold to prepare a contact face layer and a reinforcing layer; step 7, demolding; and step 8, roasting. The wood mold is adopted as the mold, the wood mold has the advantages of being low in preparation cost, reusable, certain in strength and the like, the production efficiency can be improved when multiple pairs of wood molds are used at the same time, and the precision of the ceramic mold core is ensured due to the fact that the wood mold does not deform due to gravity and self-weight and avoids shrinkage deformation. The core cleaning efficiency of the prepared ceramic core is improved, cold shut and flow marks of a casting after core removal can be obviously improved, the surface roughness reaches Ra6.3 microns, and the requirement for titanium alloy precision casting can be met.
Owner:LUOYANG SUNRUI TI PRECISION CASTING

Non-riser casting process for ductile iron

The invention discloses a ductile iron dead-head-free casting process which comprises the following steps: S1, a casting mold modeling step: filling cavities of an upper half casting mold and a lower half casting mold with dry mold sand before casting, and arranging a pouring system in the cavities of the upper half casting mold and the lower half casting mold; s2, nodular cast iron smelting, wherein raw materials of nodular cast iron are put into a cupola furnace to be smelted; step S3, spheroidizing and in-ladle inoculation treatment: performing spheroidizing by adopting a dam type flushing method, putting a spheroidizing agent into a ladle pit, tamping, covering the spheroidizing agent with a thin layer of silicon iron and cast iron scraps, performing in-ladle inoculation through an inoculant, and removing scum on the surface of the molten iron after the molten iron reacts stably; s4, pouring is conducted, specifically, the molten iron is poured into a sprue, and stream inoculation is conducted by adding an inoculant in the pouring process; and S5, cooling forming is conducted, specifically, after the casting is cooled and solidified, the casting is taken out, and a sand layer on the surface of the casting is taken out.
Owner:HUZHOU DINGSHENG MASCH CO LTD

Process for improving appearance quality of casting by using sand isolation chilling block

The invention belongs to the technical field of casting, and particularly relates to a process for improving the appearance quality of a casting by using a sand-isolating chilling block, which comprises the following steps: step 1, during molding or core making, firstly paving a layer of molding sand between risers or in a hot spot area; step 2, fixing the chilling block by using molding sand or supporting nails to ensure that the position of the chilling block is stable; 3, sand is discharged to wrap the chilling block, and it is ensured that a sand layer is firm through compaction operation; 4, after the molten steel is poured, heat of the molten steel is conducted to the chilling block through the sand layer, the local cooling speed of the casting is increased, and sequential solidification is achieved; and 5, after pouring, heat preservation is conducted till box opening is conducted, and an intact casting is formed. According to the invention, a layer of molding sand with a specific thickness is placed between the external chilling block and the mold, so that the external chilling block is converted into the sand insulation chilling block, and in order to ensure that the chilling block achieves the effect of process design requirements and can effectively play a chilling role on a casting, the thickness and size of the chilling block and the thickness of a sand insulation layer can be properly adjusted according to the size of a hot spot of the casting.
Owner:ANHUI YINGLIU INTELLIGENT MANUFACTURING GROUP CO LTD

Energy-saving furnace roller automatic cooling mold opening casting equipment

The invention relates to the technical field of casting equipment, and discloses energy-saving furnace roller automatic cooling mold opening casting equipment which comprises an upper mold, a lower mold, an upper locking assembly, a lower locking assembly and a jacking assembly. After casting is completed, cooling liquid is continuously input into the water inlet, the outlet of the lower die cooling cavity is blocked by the sealing column, the cooling liquid is gradually accumulated in the closed lower die cooling cavity, the liquid pressure is gradually increased in a stable and controllable trend, and along with continuous increase of the pressure, the sealing plate is subjected to thrust from bottom to top, so that the sealing effect is improved. When the sealing column moves to the limiting plate, the sealing column is pushed to move upwards, in the process, the liquid pressure is not instantly exploded but is gradually increased, damage of impact force to the mold is effectively avoided, after the sealing column moves to the limiting plate, the rising pressure can push the upper mold to stably rise, and automatic mold opening is achieved. According to the mode that the liquid pressure gradually rises to complete mold opening, an additional power device is not needed, the maintenance difficulty is lowered, and meanwhile a large amount of energy consumption is saved.
Owner:JIANGSU HUAYE TECH

Vacuum pouring device for precisely casting mold shell

The utility model relates to the technical field of mold shell pouring equipment, in particular to a precision casting mold shell vacuum pouring device which comprises a pouring seat, a bottom plate is arranged at the bottom of the pouring seat, a vibration mechanism is arranged between the bottom plate and the pouring seat, and a fixing column, a sealing groove and a mold groove are arranged at the top of the pouring seat. A top plate is fixedly mounted at the top end of each fixing column, a movable plate is arranged on the outer side of each fixing column in an attached and sleeving mode, an upper mold plate and an annular protruding block are fixedly mounted at the bottom of each movable plate, a pressure suction pipe is arranged at the top of each movable plate in a sealed and penetrating mode, and a sealing pressure spring is fixedly mounted on the inner wall of the bottom end of each sealing groove; according to the vacuum pouring device for the precision casting mold shell, by means of the structural design in the vibration mechanism, flowing and distribution of a mixture in the pouring process are facilitated, formation of air holes and shrinkage cavities in the mold shell is reduced, and the density and the surface quality of a casting are improved.
Owner:FUJIAN SHENGXING FOUNDRY CO LTD

High-strength alloy material based on rail transit vehicle and processing technology of high-strength alloy material

The invention relates to the technical field of alloy materials, in particular to a high-strength alloy material based on a rail transit vehicle and a processing technology of the high-strength alloy material. Raw materials are smelted and cast to obtain a cast ingot; the cast ingot is sequentially subjected to solution treatment and aging treatment, and an alloy material is obtained; uniformly mixing the compound, mica powder, a curing agent and an epoxy diluent, adding epoxy resin, a defoaming agent and a flatting agent, and performing ultrasonic treatment to obtain a corrosion-resistant coating; the high-strength alloy material is obtained by sequentially grinding, polishing, cleaning and drying the surface of an alloy material, coating a corrosion-resistant coating, and curing to form a corrosion-resistant coating. The prepared high-strength alloy material has excellent mechanical properties, corrosion resistance and hydrophobicity, and is suitable for application requirements of rail transit vehicles.
Owner:JIANGSU JIAERMA ELECTRIC CO LTD

Nickel-based alloy composite board and preparation method thereof

The invention relates to a nickel-based alloy composite plate and a preparation method thereof, and belongs to the technical field of alloy preparation. The alloy reinforcing agent is prepared under the sintering condition of high-temperature reducing gas protection by mixing the lanthanum element and the nanometer aluminum oxide, the granularity can be refined in the smelting process by adding the alloy reinforcing agent, and the wear resistance, hardness, strength and oxidation resistance of the alloy are effectively improved. Nickel is used as a matrix, an alloy reinforcing agent and elements such as molybdenum, copper, boron and hafnium are added, meanwhile, a mixture of potassium chloride and magnesium fluoride is used as a fluxing agent, uniform mixing and reaction of alloy components are promoted, and the nickel-based alloy smelted through step-by-step heating in vacuum has high hardness and strength and good abrasion resistance, corrosion resistance and high temperature resistance; and the stainless steel substrate and the nickel-based alloy plate are tightly combined through welding treatment, and the nickel-based alloy composite plate is suitable for manufacturing a vacuum chamber.
Owner:SHANGHAI SHUNFENG MACHINERY MFG

Coating for casting alloy steel evanescent mode as well as preparation method and application thereof

The invention provides a coating for casting an alloy steel lost foam as well as a preparation method and application of the coating. The coating comprises the following raw materials in parts by weight: 79-89 parts of aggregate, 3-7 parts of a binder, 4-7 parts of a suspending agent, 1.5-3 parts of a surfactant, 1.5-2.5 parts of a defoaming agent and 1-1.5 parts of a preservative, the aggregate is prepared from the following components in percentage by mass: 78 to 82 weight percent of bauxite, 12 to 15 weight percent of mica and 3 to 10 weight percent of quartz powder; the binder is prepared from the following components in percentage by mass: 42 to 50 weight percent of anhydrous aluminum dihydrogen phosphate, 18 to 25 weight percent of white carbon black, 12 to 17 weight percent of ethylene glycol and 8 to 28 weight percent of magnesium oxide; the coating for casting the alloy steel evanescent mode keeps good suspension property, high-temperature air permeability, coating property, high-temperature crack resistance and shedding property of the coating, the surface of a casting is smooth and free of burnt-on sand, less harmful gas is volatilized during firing, and harmful gas generated by burning of a white mold can be absorbed.
Owner:SHANGHAI DISHENG ANTICORROSION NEW MATERIAL TECH CO LTD

Casting core post and socket joint

A casting core assembly has: a first ceramic piece including a projecting post; a second ceramic piece including a socket; and a ceramic filler material between the post and the socket. In transverse section at at least one location one of the post and socket has a configuration of: three circumferentially offset radial peaks of a peak radius (RPMAX, RSMAX); and three radial troughs of a trough radius (RPMIN, RSMIN) not more than 98.0% of the peak radius.
Owner:RTX CORP

Preparation method of low-cost high-performance TiAl alloy engine blade

The invention discloses a preparation method of a low-cost high-performance TiAl alloy engine blade, relates to the technical field of TiAl alloy preparation, and provides a method for preparing the TiAl alloy blade by combining precision casting and vacuum isothermal forging. The process route comprises the steps of prefabricated blank smelting and precision casting, annealing heat treatment, vacuum isothermal forging of a blade final forging piece, heat treatment and blade machining, and compared with a cast blade, the mechanical property is remarkably improved, and the yield is also remarkably increased; compared with a traditional forged blade, the manufacturing cost is greatly reduced due to the fact that the process is greatly shortened; compared with ingot casting / rod casting and high-temperature forging, the method has the advantages that the material utilization rate and the mechanical property are improved, and the manufacturing cost can be reduced; in addition, compared with forging under the atmospheric condition, the problem of severe oxidation does not exist, and the material utilization rate and the mechanical property are obviously improved. Therefore, the method provided by the invention has important commercial value.
Owner:HARBIN INST OF TECH

Sand mold 3D printer for casting

The invention discloses a sand mold 3D printer for casting, which is applied to the technical field of casting molds, and is characterized in that a structural frame is arranged as a support of a structure and is lifted to a horizontal height convenient to use, a sand supply device is used for extracting sand, and the sand is injected into a sand shakeout device; when the sand material is fed, the sand material is guided by the sand material hopper with a larger area, so that the material is not easy to scatter, then the sand material is guided into the sand storage box, and the arranged stirring shaft continuously rotates on the inner side of the sand storage box and is matched with the spiral blade on the outer side of the stirring shaft to continuously stir the sand material, so that the sand material continuously keeps moving; the adhesive spraying device is arranged in the sand hopper and is relatively uniform in the sand hopper, meanwhile, the effect of smashing caked sand is achieved, the situation that the structure is blocked is avoided, and during manufacturing, the molding box moves to the bottom of the structural frame, and then the adhesive spraying device moves along the horizontal guide rail.
Owner:NANTONG TENGGUANG MACHINERY TECHNOLOGY CO LTD

Valve casting forming die

The utility model discloses a valve casting forming mold, which belongs to the field of valve production and comprises a support column, a support plate fixedly connected to the top of the support column, a lower mold arranged at the top of the support plate, a mold closing mechanism arranged above the lower mold, a demolding mechanism arranged at the bottom of the lower mold, a bottom plate and a plurality of side plates, the bottom plate is fixedly connected to the top of the supporting plate, the side plate is slidably connected to the top of the bottom plate, and adjusting mechanisms are arranged on the periphery of the lower mold. The device has the beneficial effects that the adjusting mechanism is arranged and comprises a connecting rod and an extension rod, the ends, close to each other, of the connecting rod and the extension rod are both in a wedge shape, an electric push rod is used for driving a transverse plate to drive an ejector rod to move upwards, and when a valve casting is ejected out, the connecting rod can drive side plates to move in the direction away from each other under driving of the extension rod; the gap between the side plate and the valve casting is enlarged, friction between the side plate and the valve casting is reduced, and the quality of the valve casting is prevented from being affected.
Owner:FUJIAN TIANYUE MASCH CO LTD

Method for preparing ceramic shell for precision casting

A method for preparing a ceramic shell for precision casting. The method comprises: S1, smearing the exterior of a wax pattern with corresponding layers of ceramic shell slurry layer by layer, wherein a ceramic shell to be dried is obtained at a corresponding layer each time after the smearing of the ceramic shell slurry is completed; S2, putting said ceramic shell at each corresponding layer into a vacuum rapid drying system for a vacuum rapid drying treatment, and after the drying of the ceramic shell at the layer is completed, smearing same with a subsequent layer of ceramic shell slurry, wherein during the vacuum rapid drying treatment, image data of the ceramic shell to be dried is first acquired and subjected to model structure analysis so as to obtain the position, orientation and depth of a deep hole in the ceramic shell to be dried, same are sent to a fan set control module, the fan set control module performs fan set control analysis according to the position, orientation and depth of the deep hole in the ceramic shell to be dried and controls the starting and stopping and / or control parameters of each fan set according to an analysis result, and the drying time of all portions of the integral ceramic shell to be dried tends to be identical by means of vacuumizing a vacuum drying chamber and / or restoring the chamber pressure and controlling the starting and stopping and / or control parameters of all the fan sets; and S3, waiting for the completion of the drying of the ceramic shells at all the layers to obtain a ceramic shell for precision casting. On the basis of retaining the inherent advantages of a thick-slurry ceramic shell, the preparation method effectively overcomes problems present in the thick-slurry ceramic shell.
Owner:CAI YAOMING

Symmetrical two-piece hollow-vane assembly joined via brazing along airfoil centerline

A hollow vane assembly including an open body including an interior; at least one cover support structure formed in said open body proximate the interior; a cover brazed to the open body to form at least one flow passage; and the open body and the cover configured as two piece substantially symmetrical halves.
Owner:RTX CORP

Casting method of servo valve body

The invention relates to a marine machinery technology, and discloses a casting method of a servo valve body, which comprises the following steps: step S100, making casting equipment of a casting process through three-dimensional mapping design, casting simulation, optimization design and simulation verification in sequence, respectively placing patches, risers and chilling blocks on two sides of a valve core of a mold and the upper surface of the mold, and casting the valve body of the servo valve; a temperature gradient is formed through the synergistic effect of the patch, the riser and the chilling block so as to control and optimize the solidification process of the casting; s200, a series core frame used for connecting the resin chromite sand layer and the ester-hardened sodium silicate sand layer in series is placed in the mold, then the working faces of the mold and the core are filled with resin chromite sand, and the non-working faces are filled with ester-hardened sodium silicate sand; and S300, molten steel smelting is carried out, and the molten steel is prepared from, by percentage, 0.34%-0.35% of C, 0.45%-0.46% of Si, 0.70%-0.71% of Mn, 0.93%-0.95% of Cr, 0.20%-0.30% of Mo, smaller than or equal to 0.025% of S and smaller than or equal to 0.025% of P. The technical problems that in the prior art, a valve body is poor in performance and quality can be solved.
Owner:CHONGQING CHANGZHENG HEAVY IND

Sand casting mold

The invention relates to the field of casting equipment, and discloses a sand mold casting mold which comprises an upper mold body, a lower mold body and a vertical rod used for being matched with the upper mold body to slide, and further comprises a knocking mechanism used for knocking the lower mold body, an oscillating mechanism used for oscillating the upper mold body and a supporting plate fixedly connected with the bottom of the lower mold body. According to the scheme, the vibration mechanism is used for reducing the adhesive force between a formed part and the surface of the mold in a vibration mode, meanwhile, the knocking force generated by the knocking mechanism on the lower mold body is used for promoting tiny distance displacement between the formed part and the lower mold body, and the formed part can be smoothly demolded from the upper mold body and the lower mold body in sequence; therefore, the technical problem that a formed part is not easy to strip from the upper die body and the lower die body of an existing sand casting die is solved.
Owner:CHONGQING NATIONAL INNOVATION INSTITUTE OF LIGHT ALLOYS CO LTD

Casting method of shell

PendingCN119657845ASolve process bottlenecksImprove yieldFoundry mouldsFoundry coresLadleSmelting
The invention discloses a casting method of a shell, which comprises the following steps: a sand mold manufacturing step: placing a shell mold comprising a pouring system and an auxiliary feeding system on a jolt ramming table of resin sand mixing equipment, buckling a matched welding sand box, and filling sand grains mixed with resin and a curing agent into the welding sand box; after full filling, molding, curing and closing the box; molten iron smelting is conducted, specifically, all the components are molten and then continue to be heated for smelting, tapping is conducted after molten iron is killed, melted down and cooled, and the molten iron comprises, by mass, 3.4%-3.8% of C, 2.5%-3.2% of Si, 0.2%-0.4% of Mn, 0.06%-0.11% of S, 0.2%-0.5% of Cu and the balance iron and inevitable impurities; a spheroidizing and pouring step, specifically, molten iron is poured into a spheroidizing ladle, a spheroidizing reaction is performed in a wire feeding spheroidizing mode, after the spheroidizing reaction is completed, the molten iron is poured into a pouring ladle filled with a covering agent and a nucleating agent, pouring is performed, and stream inoculation is performed in the pouring process; and a post-treatment step: cooling and unpacking after pouring is completed, removing a casting head, polishing, and carrying out stress relief annealing.
Owner:CHANGZHOU LANGRUI CASTING +1

Bearing hub casting mold and casting method

PCT designated stage expiredWO2025138772A1Foundry mouldsFoundry coresCasting moldMechanical engineering
A bearing hub casting mold and casting method. The mold comprises part models, risers and a sprue bush, wherein each riser is connected to the top of the part model; the sprue bush is connected to each riser by means of a horizontal runner; and the part models, the risers and the sprue bush are sequentially distributed from bottom to top in a vertical direction. In the bearing hub casting mold, by means of the provision of the riser at the top of each part model, a bearing hub is cast-molded by means of a top-pouring process, and after pouring, there is no isolated liquid-phase region during a solidification process of a casting, and the casting has no shrinkage porosity defect, thereby improving the quality of a bearing hub part.
Owner:HUBEI XINGYUAN TECH CO LTD

Casting production device for corrosion-resistant cast iron cylinder sleeve

The invention discloses a casting production device of a corrosion-resistant cast iron cylinder sleeve, and relates to the technical field of cylinder sleeve casting, the casting production device comprises a bottom frame, a bottom shell is fixed on the top surface of the bottom frame, two sliding grooves are formed in the top surface of the bottom shell, the cylinders are fixed on four edges of the top surface of the bottom frame, and the top shell is fixed on the top of the outer wall of the cylinders. An electric hydraulic rod penetrates through and is fixed to the middle of the top face of the top shell, a sliding shell is fixed to the bottom face of the telescopic end of the electric hydraulic rod, the inner wall of the sliding shell is slidably connected with the outer wall of a cylinder, a round mold is arranged in the middle of the bottom face of the sliding shell, a sand mold block and a U-shaped frame are placed in the middle of the top face of the top shell, and the U-shaped frame is fixed to the bottom end in the bottom shell. The sand mold block is clamped and positioned through the two U-shaped frame plates, so that the problem that the casting effect of the corrosion-resistant cast iron cylinder sleeve is poor due to the fact that the sand mold block deviates on the table top is solved.
Owner:SANMING UNIV

High-precision control method for stainless steel casting

The invention relates to the technical field of precision casting, and discloses a high-precision control method for stainless steel castings, which comprises the following steps: preparing raw materials, recording component characteristics of the raw materials, designing a formula proportion of the raw materials, carrying out pouring process design, and setting a parameter control system in each link of pouring, according to the shape of the needed stainless steel casting, mold design and manufacturing and mold quality control are carried out, grinding tool design parameters are recorded, a stainless steel casting solidification process simulation model is established according to raw material component characteristics, a raw material formula proportion, a designed pouring process and the mold design parameters, and the casting solidification process is simulated in the model. The method comprises the following steps: predicting a defect area in a casting production process, carrying out advanced prevention and optimization treatment on the defect area according to the predicted defect area in the casting production process, strengthening a refining degassing operation in a casting process, further carrying out a metal solution purification step after refining degassing, and demolding the casting, and the mold is cleaned, checked and maintained in time.
Owner:无棣县顺业不锈钢制品有限公司

Special coating for lost foam of motor casing as well as preparation method and application of special coating

The invention belongs to the technical field of motor casing lost foam casting, and particularly relates to a special coating for a motor casing lost foam as well as a preparation method and application thereof. Through a quantitative formula design method, an aggregate proportion calculation formula based on thermal expansion coefficient matching and a grain size distribution correlation formula based on target air permeability, cooperative compounding of quartz powder and bauxite is achieved, and key functional components such as mullite, organic matter fibers and crystalline flake graphite are combined; the unification of high air permeability and excellent crack resistance of the motor shell lost foam coating is realized. The invention further provides a two-time coating gradient drying efficient process matched with the coating, and on the premise that the coating performance is guaranteed, the production efficiency is remarkably improved, and the energy consumption is reduced.
Owner:HEBEI YUEXIN SILICON NEW MATERIALS CO LTD

Manufacturing method of hollow non-straight section composite material part

The invention relates to the technical field of part manufacturing, in particular to a hollow non-straight section composite part which is characterized in that a low-melting-point alloy is used for manufacturing a core mold to serve as a forming inner mold, fiber prepreg is laid on the surface of the core mold and subjected to curing treatment to form a shell structure, finally, the inner mold is removed in a melting mode, and the hollow non-straight section composite part is obtained. According to the hollow non-straight composite material part manufacturing method, the characteristic that materials can be controllably removed is utilized, the mold design is greatly simplified, the manufacturing cost is reduced, and meanwhile the forming freedom degree of a complex geometric structure is improved.
Owner:ZHUHAI LINGHANG COMPOSITE MATERIALS TECH CO LTD

Elevation control and precise regulation and control method for frozen sand mold additive manufacturing in time sequence space

The invention relates to an elevation control and precise regulation and control method for frozen sand mold additive manufacturing in a time sequence space. According to the method, a mathematical model that the thickness of floating sand changes along with time due to moisture heat exchange of the frozen sand mold in air is established, and the thickness of the floating sand of frozen sand molds with different curved surfaces under the parameter conditions of different environment temperatures, time scales, sand mold materials, moisture contents and the like is predicted and fed back; and in the freezing printing process, real-time adhesive and height compensation is carried out on sand molds at different wall thicknesses, and the dimensional precision and geometric precision of the frozen sand molds are protected to a certain extent. According to the method, the problem of dimensional accuracy error caused by floating sand generated by heat exchange in air in the manufacturing and subsequent placing processes of the frozen sand mold is effectively solved, and the dimensional accuracy of the sand mold during casting is ensured.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Intelligent temperature control type casting mold

The invention discloses an intelligent temperature control type casting mold, and relates to the technical field of casting molds. A cooling mechanism is fixedly arranged at the center position of the top face of the bearing base and comprises a cooling frame, and the cooling frame is fixedly installed at the center position of the top face of the bearing base. Wherein preheating mechanisms are fixedly arranged on the left side and the right side of the upper portion of the bearing base correspondingly, each preheating mechanism comprises a preheating frame, and the preheating frames are fixedly installed on the left side and the right side of the top face of the bearing base. According to the intelligent temperature control type casting mold, in the combining process of the upper mold body and the lower mold body, through overturning of the preheating mechanism, the mold cavities on the upper side and the lower side are heated, the situation that the temperature difference between the mold cavities and materials is too large, and the service life is affected is avoided; and cracks caused by rapid cooling are avoided, and the casting forming precision and the temperature control effect are improved.
Owner:TAIYUAN BEST MASCH CASTING CO LTD

Pouring device and technology for improving ceramic core deviation in casting pouring

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.
Owner:JIANGSU SUVAST SPECIAL ALLOY TECH CO LTD