800 results about "Sprue" patented technology

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.

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.

A method of casting metal parts such as valve seat inserts comprises pouring molten metal into a gating system of a mold plate stack wherein mold plates are located between a cover mold and a bottom mold, the gating system including a casting header, down-sprue, at least one distribution runner, at least one up-sprue, runners and gates in fluid communication with mold cavities configured to form metal parts, and the gating system including at least one internal passage in the cover mold in fluid communication with the up-sprue and the down-sprue. During filling of the mold cavities with the molten metal, air trapped in the mold plate stack is expelled to surrounding atmospheric air via the up-sprue, the internal passage and an upper end of the down-sprue. The molten metal is solidified to form cast metal parts interconnected by solidified metal in the down-sprue, distribution runner, runners and gates, up-sprue and internal passage.

The invention belongs to the technical field of casting, and particularly relates to a pouring device and method capable of dynamically adjusting the position, flow and flow direction of a pouring gate, the pouring device comprises a pouring ladle, a casting mold and a pouring pipe, the upper end of the pouring pipe is arranged on the pouring ladle, and the lower end of the pouring pipe is inserted into a cavity in the casting mold; the multi-degree-of-freedom movement mechanism is connected with the pouring pipe and is used for regulating and controlling the position of the pouring pipe; the sprue opening and closing assembly is used for controlling the opening and closing state of the sprue; the lateral flow outlet opening and closing assembly is used for controlling the opening and closing state of the lateral flow outlet; according to the pouring device and method, the design difficulty of a pouring system and the casting mold preparation difficulty are simplified, the process yield of castings is increased, the mold filling state, the mold filling capacity and the solidification feeding effect of molten metal are optimized, and the casting quality is improved. And the quality of the casting is improved, the flexibility and controllability of the production process are improved, and fusion with other technologies is facilitated.

The utility model belongs to the technical field of dies, and discloses an automatic water gap cutting die. The automatic water gap cutting mold comprises an upper mold, a lower mold, a runner plate and a linkage mechanism. And the upper mold and the lower mold are closed to jointly form a mold cavity for molding a plastic product. The runner plate is arranged on the lower mold in a sliding mode, the runner plate and the upper mold jointly form a glue supply runner after the upper mold and the lower mold are assembled, injection molding materials can be guided into the mold cavity through the glue supply runner, and a water gap is formed in the runner plate. The upper mold is in transmission connection with the runner plate through the linkage mechanism, so that the upper mold can drive the runner plate to slide through the linkage mechanism during mold opening, and the runner plate is separated from the mold cavity to cut off the water gap. When the mold is opened, the upper mold drives the runner plate to slide through the linkage mechanism to cut off the water gap, other special jigs or manual cutting is not needed, the water gap is cut off through the acting force of mold opening, the production efficiency of plastic products is improved, meanwhile, the cutting-off positions of the water gap are consistent, the consistency of the plastic products is high, and the percent of pass of the plastic products is higher.

The invention relates to the technical field of injection molding, in particular to an injection mold which comprises a front mold plate, a front mold core, a rear mold plate, a rear mold core, a rear mold slide seat, a stripper plate, an upper fixing plate, an ejector plate and a sprue needle which are connected with the ejector plate and the rear mold core respectively, and the sprue needle is provided with a sprue demolding part; the upper fixing plate is provided with a main runner, the stripper plate, the front mold plate, the front mold core and the rear mold slide seat are provided with branch runners, the rear mold core is provided with a sprue, the main runner, the branch runners and the sprue are communicated, the sprue is divided into a needle connecting part, a true water gap part and a false water gap part, and the true water gap part and the false water gap part are communicated with each other. And the true nozzle part and the false nozzle part are symmetrically arranged relative to the needle connecting part in a balanced manner. By means of the pouring gate demolding part, the contact area between the pouring gate needle and the material head is reduced, the phenomenon of bouncing off is not prone to occurring, the gravity center of the material head is balanced and the phenomenon of bouncing off is not prone to occurring due to the fact that the real water gap part and the fake water gap part are symmetrically arranged in a balanced mode.

The utility model relates to the technical field of injection molds, in particular to an injection mold cooling system which comprises a base, a sliding rod is fixedly connected to the base, a bottom plate is slidably arranged on the sliding rod, a lower mold is arranged on the bottom plate, a hydraulic rod used for pushing the bottom plate to move along the sliding rod is arranged on the base, and a top plate is fixedly connected to the top of the sliding rod. An upper mold is arranged on the top plate, the upper mold and the lower mold are respectively provided with a forming cavity, a sprue bush is mounted on the top plate, the sprue bush is communicated with the forming cavity of the upper mold, a plurality of heat conduction pipes are inserted into the upper mold and the lower mold at intervals, one end of each heat conduction pipe is processed to form a large-head end, and the other end of each heat conduction pipe is processed to form a small-head end. Cooling cavities are formed in the top plate and the bottom plate, the large-head ends are located in the cooling cavities, the top plate and the bottom plate are jointly connected with a circulating assembly, and the effects that the cooling speed of plastic parts in the injection mold is increased, and the injection molding work efficiency is improved are achieved.

The utility model relates to an automatic product taking and water gap separating jig for injection molding, which is connected to a manipulator clamp and comprises a clamp main plate connected to the lower end of the manipulator clamp and provided with an open slot for allowing a water gap of a product to penetrate through; the punching mechanism is arranged at the lower end of the clamp main plate and used for punching a water gap of the product; the positioning mechanism is arranged at the lower end of the clamp main plate, and the positioning mechanism is used for positioning and fixing the punching mechanism; the fixing mechanism is arranged at the upper end of the clamp main plate, and the fixing mechanism is used for clamping and releasing a water gap of a product; and the clamping mechanism is arranged at the lower end of the clamp main plate, is adjacent to the positioning mechanism and is used for clamping and releasing the product. By the adoption of the structure, automatic clamping of products and separation of water gaps are completed, the water gaps are automatically classified and collected, and the production efficiency of the products is improved.

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 the technical field of flow guide shell pouring, in particular to a novel casting pouring process method of a flow guide shell for a deep-well pump, which comprises the following steps: acquiring molten iron liquid level temperature data, pressure data and an infrared image; a first ladle of molten iron is injected from a bottom straight pouring gate according to a first injection parameter, flows into a bottom transverse pouring gate, then enters a bottom inner pouring gate and flows into a flow guide shell cavity for the deep-well pump; evaluating whether the liquid level heat loss of the first ladle of molten iron is qualified, and adjusting a first pouring parameter; when the first ladle of molten iron reaches the preset temperature measuring point, a second ladle of molten iron is injected into a top sprue according to a second injection parameter, and the second ladle of molten iron enters the top sprue and then sequentially flows through a top cross gate and a top ingate to enter a special feeding head; whether a feeding channel of the special feeding head is blocked or not is evaluated, and the second preset pouring rate is adjusted; and whether heat distribution on the surface of the cavity is uniform or not is determined based on the heat dispersion deviation characteristic value, and the second preset pouring temperature is adjusted. The casting stability of the guide shell for the deep-well pump is improved.

The invention discloses a preparation method of a TiAl alloy casting containing return scraps, the TiAl alloy return scraps used in the preparation method are casting sprues, patches and skull which are cut off in subsequent processing, and the preparation method comprises the following specific implementation steps: carrying out ultrasonic cleaning and surface treatment on the return scraps to remove a surface oxide layer; a new material with the target weight of 50% is used for smelting during primary smelting to obtain a primary ingot, a return material is placed below the turned primary ingot before secondary smelting, and then the primary ingot is smelted and poured into a preheated mold to form a casting, so that recycling of a TiAl alloy raw material is realized, the raw material cost is reduced by 50%, the preparation cost is reduced by 33%, and the production efficiency is improved. And the power consumption and the equipment loss are reduced, so that the purposes of energy conservation and emission reduction are achieved. The impurity element control of the cast ingot produced by the method is equivalent to that of alloy produced by conventional raw materials, and is convenient and fast compared with a preparation process by directly utilizing the raw materials. And the poured casting is uniform in component, compact in structure and high in purity.

The invention relates to the technical field of workpiece residual root grinding, and discloses an abrasive belt grinding and deburring machine for residual roots of a casting head of a turbine shell of a gas compressor, which comprises a grinding and deburring machine main body and a grinding and deburring mechanism fixed at the rear end of the top of the other side of the grinding and deburring machine main body, a first stand column is fixedly installed on one side of the top of the grinding and deburring mechanism, and a second stand column is fixedly installed on the other side of the top of the grinding and deburring mechanism. When the residual root of the casting head of the turbine shell of the gas compressor is ground, if the cross section of the residual root is large and smooth, the bending adjusting plate is rotated to be in a vertical state, the maximum cross section of the first grinding abrasive belt makes contact with the residual root for grinding, and if the residual root is a curved surface or an inclined surface, the bending adjusting plate is rotated to be adjusted to a proper angle, so that the residual root is ground. And then, after a locking bolt penetrates through an arc through groove to lock the bending adjusting plate, the first grinding abrasive belt is located at a proper angle to grind the residual root of the casting head of the turbine shell of the gas compressor.

The invention relates to a valve casting pouring gate water jet cutting method based on machine vision. A valve casting pouring gate water jet cutting device based on machine vision comprises a mechanical arm automatic feeding device, a multi-angle pouring gate cutting displacement clamp, a cutting part recognition device and a three-axis water jet cutting machine tool. A valve casting is fixed on a special tray and is fixed in a standardized posture, namely, a first round pipe body is erected in a V-shaped erecting groove of the tray, a first runner section is erected on a second supporting plate, and the upper end flange face of a second connecting flange is horizontal, so that the valve casting is kept stable on the tray; and the 3D camera is more accurate in shooting and posture recognition. The machine vision automatically recognizes a to-be-cut part, an accurate cutting path is intelligently generated to be matched with water cutting equipment, the cutting precision and efficiency are remarkably improved, automation of the whole process from machine vision recognition automatic feeding, machine recognition multi-angle automatic overturning and cutting after clamping to quality inspection and discharging is achieved, and the production efficiency is remarkably improved.

The invention discloses non-quenched and tempered steel for an automobile piston and a production process of the non-quenched and tempered steel. The steel comprises the following chemical components in percentage by weight: 0.37%-0.40% of C, 0.60%-0.75% of Si, 1.40%-1.50% of Mn, less than or equal to 0.025% of P, 0.020%-0.040% of S, 0.10%-0.20% of Cr, 0.012%-0.025% of Alt, 0.08%-0.13% of V, 0.015%-0.030% of Ti, less than or equal to 0.05% of Mo, less than or equal to 0.10% of Ni, less than or equal to 0.10% of Cu, 0.015%-0.020% of N and the balance of Fe and inevitable impurities, and the ratio of Alt to N is 0.6-1.0. The RH-LF process is innovatively developed, and stable control over the nitrogen content, zero blockage of a water gap and reduction of bending deformation of steel are achieved in cooperation with the manganese nitride alloy, nitrogen control through bottom blowing of nitrogen, the Ca alloying process and the rolling heat preservation process.

The high-quality casting device for producing a thick aluminum part includes: a mold having a movable mold and a fixed mold coming into close contact with each other to form a cavity; a platen having a movable platen on which the movable mold is mounted and a fixed platen on which the fixed mold is mounted; an upper tie bar and a lower tie bar connected to the platen; a high-pressure squeeze platen connected to the upper tie bar and the lower tie bar; a squeeze pressurizer located on the high-pressure squeeze platen to pressurize a molten metal filled into the cavity; a sprue adapted to pour the molten metal into the cavity of the mold; a pouring ladle attached to the mold to pour the molten metal into the sprue; and a casting extractor located on one side of the mold to extract the casting solidified inside the cavity.

The invention relates to a box type sand core type pouring system which comprises a sand box, a pouring system and a sand core box, and the pouring system comprises a first mold, a plurality of second molds, a cavity and a sprue; after sand is put into the sand core box to be solidified, the sand box is opened, and the first mold and the second mold are pulled out, so that channels, left on the sand box and the sand core box, of the first mold and the second mold form a transverse pouring gate and an inner pouring gate respectively; enabling the molten iron to sequentially pass through a straight pouring gate, an inner pouring gate and a transverse pouring gate to enter a cavity, and completing the molding of a casting; by optimizing the design of the pouring channel, uniform distribution of molten metal is achieved, the defects, such as air holes and shrinkage porosity, in a casting are reduced, and the overall quality of the casting is improved. By optimizing the design of the pouring channel, the hardness deviation of the plate surface is obviously reduced to be at least HB10, the sand inclusion and falling defects of the plate surface are eliminated, the use of consumables such as a ceramic tube, a rubber bottom and tube sticking glue is reduced, the production cost is greatly reduced, and the production efficiency is improved.

The application relates to the technical field of die casting equipment, and particularly discloses an energy-saving die casting machine, which comprises a mold locking column frame and a barrel, the barrel is arranged on the mold locking column frame, a die cavity is coaxially arranged in the middle part of the barrel, a die assembly is arranged in the die cavity and can slide in the die cavity to press the metal liquid into a mold, a sprue is arranged on the barrel and connected with the die cavity, a bushing part is connected to the inside of the sprue, and annular parts are coaxially arranged on the two ends of the bushing part and outside the barrel, the energy-saving die casting machine can protect the sprue by the bushing part when the metal liquid is poured, the annular parts can block the metal liquid at the two ends of the sprue, the metal liquid can only slide in the area between the two annular parts, and when the die rod pushes the hammer head to press the metal liquid, the arc-shaped plate rotates around the barrel between the two annular parts to gather and push the sliding metal liquid to the sprue.

The invention discloses a forging method and a forging device for a thin-wall wind power main shaft with an ultra-large inner hole, and belongs to the technical field of wind power main shaft manufacturing. The invention discloses a forging method for a thin-wall wind power main shaft with an ultra-large inner hole. The forging method comprises the following steps that firstly, chamfering, water gap removing, upsetting and drawing-out are conducted, and then blanking is conducted; step 2, upsetting to a certain height by using an upsetting drain plate, punching, chambering by using a saddle, coining and distributing; thirdly, shaft bodies are formed and subjected to heat preservation, all shafts in the middle are drawn out to the process size through a profiling core rod, and finally the two small shafts are reserved in advance for hole shrinkage; fourthly, the inner hole of the small shaft end is shrunk to the process size, the flange is upset to the process size through a special tool, and finishing is conducted; by means of the profiling core rod, the shaft hole can be conveniently machined, the follow-up machining time is shortened, waste of workpieces can be reduced, the nozzles are arranged on the inner wall of the protection plate, the working face of the anvil block can be purged in the forging process, gathering of oxidized chippings on the anvil block is reduced, and the forging efficiency is improved.

The invention belongs to the technical field of injection molds. The problems that in the prior art, an automatic sprue shearing structure of an existing injection mold is large in occupied space, poor in sprue shearing quality and long in shearing action beat are solved. The automatic sprue shearing structure of the injection mold comprises a rotating shaft which is vertically and rotatably arranged on a movable mold, a branch runner which is communicated with a cavity and a main runner is formed between the upper end face of the rotating shaft and a fixed mold, a spiral groove is formed in the outer side wall of the rotating shaft, and a steel ball fixing ring is fixedly connected to the movable mold. The rotating shaft is inserted in a steel ball fixing ring, a steel ball is embedded in the steel ball fixing ring, the steel ball is embedded in a spiral groove of the rotating shaft, the movable mold comprises a first movable mold plate and a second movable mold plate which are sequentially arranged from top to bottom, and when the first movable mold plate moves relative to the second movable mold plate, the first movable mold plate is fixed; the rotating shaft can move in the vertical direction and can be pushed by the steel balls to rotate by a certain angle. The pouring gate shearing device has the advantages of compact structure, good pouring gate shearing quality and short shearing action beat.

The utility model relates to the technical field of casting pouring gate cutting, in particular to a casting pouring gate cutting device which comprises a bottom plate, a collecting box used for collecting and cutting a casting pouring gate is arranged on the upper portion of the bottom plate, and first sliding grooves vertically penetrating through a mounting plate are formed in the two sides of the mounting plate. A clamping plate used for clamping a casting is slidably arranged in the first sliding groove, a support is fixedly mounted on the upper portion of the mounting plate, and a cutting mechanism used for cutting a pouring gate of the casting is arranged on the upper portion of the support. A plurality of first electric telescopic rods simultaneously push the push plate to move relatively, so that gaps among a plurality of castings placed on the mounting plate are gradually reduced, the castings are ensured to be in the central position of the positioning plate, and when a second electric telescopic rod pulls a clamping plate to move, the pouring gate ends of the castings are attached to the positioning plate, so that the casting quality is improved. And non-uniform cutting during casting pouring gate cutting is avoided, multiple castings can be conveniently cut at the same time, and the cutting efficiency is improved.

The utility model discloses a low-pressure casting device for a direct mold filling flywheel casing, and belongs to the technical field of casting of automobile parts. A low-pressure casting device for a direct mold filling flywheel casing comprises a mold piece composed of a lower mold, a side mold and an upper mold, a mold core is arranged in the mold, a mold cavity is formed among the mold core, the lower mold, the side mold and the upper mold, and the low-pressure casting device further comprises a transition connecting device arranged on the lower mold. The transition connecting device is provided with a liquid inlet, a transition cavity and at least two groups of sprue gates, and the transition cavity is communicated with the mold cavity through the sprue gates; according to the utility model, through the arrangement of the transition connecting device, a pouring channel is omitted, a product is directly molded by pouring, solution materials in the pouring gate are saved, and the yield of the product is improved.

The utility model discloses a steel casting machining sprue cutting device which comprises a workbench, a motor is fixedly installed at one end of the workbench, a reciprocating lead screw is fixedly installed at the output end of the motor, and an extension plate is fixedly installed at one end of a movable plate. And a cleaning assembly for cleaning the end face of the workbench is movably mounted in the workbench. According to the casting sprue cutting device, by arranging the placing plate, the rack, the rotating rod, the push plate and the like, when a worker uses the casting sprue cutting device to cut a casting sprue, the worker only needs to place a workpiece to be cut in a fixing groove in the placing plate, the cutting device and the motor are started, and then the workpiece can be automatically cut; and in addition, when the movable plate moves downwards, the rotating rod is driven to rotate integrally, so that the push plate can push the pouring cups left on the end face of the workbench and the pouring cups and waste chips generated by cutting into the screen.

At least one of an outer ring and an inner ring of the insulating bearing is arranged to be an insulating ferrule, the insulating ferrule comprises a body, and the body further comprises a roller path, a bearing body and a bearing body, an axial end face; and a radial outer peripheral surface disposed opposite to the raceway in the radial direction. A material removal portion is included on a surface of the body, and an insulating layer is overmolded on the body and molded into the material removal portion. The invention further provides a manufacturing method of the insulating bearing. The manufacturing method comprises the step that a sprue of an injection molding machine for overmolding the insulating layer is arranged to enable a weld line of the overmolded insulating layer to avoid a main stress bearing area of the insulating ferrule and / or to be formed at the position, with the maximum thickness, of the insulating layer. The invention provides an insulating bearing and a manufacturing method thereof for solving the problem of electric corrosion of a bearing used in a high-pressure environment. Good electrical insulation of the bearing is achieved, the insulation layer can be further prevented from moving in the axial direction and / or the circumferential direction, the electrical performance of the insulation layer and the whole bearing is greatly improved, and the service life of the insulation layer and the whole bearing is greatly prolonged.

A discharging device for mold production comprises a discharging mechanism arranged above one end of a mold cavity, the discharging mechanism comprises a horizontally-arranged main material pipe, a vertically-arranged pouring cup is arranged at the top end of the main material pipe, the lower end of the pouring cup is communicated with the main material pipe, and the two ends of the main material pipe are sealed; a plurality of first risers which are uniformly arranged at intervals in the length direction of the main material pipe are arranged on the left side of the main material pipe, branch material pipes are communicated between the first risers and the main material pipe, and discharging holes are formed in the bottom ends of the first risers; the die further comprises a second riser arranged above the other end of the die cavity, openings are formed in the bottom end and the top end of the second riser, a vertically-arranged breather pipe is fixed to the top end of the second riser, the bottom end of the breather pipe is communicated with the second riser, and the top end of the breather pipe is open. The device is simple in structure and convenient to use.

The utility model relates to the technical field of shearing and polishing of feed ports, and discloses an injection molding feed port shearing and polishing device which comprises a supporting plate, a shearing assembly, a polishing assembly, a fixing structure, a horizontal moving structure and a clamping assembly. The shearing assembly is fixed to one side of the rear portion of the supporting plate, and the grinding assembly is fixed to the rear portion of the supporting plate and located beside the first shearing assembly. The fixing structure and the clamping assembly are arranged above the horizontal moving structure, an injection molding product to be polished is fixed through the fixing structure, the shearing assembly is used for shearing a material opening of the injection molding product, the clamping assembly is used for clamping the sheared material opening, and the horizontal moving structure is used for driving the fixing structure and the clamping assembly to move horizontally. Through cooperation of shearing and polishing, a sprue of an injection molding part is sheared and polished to be flat, the injection molding machining efficiency can be improved, and the appearance and quality of the injection molding part can be improved.

The utility model discloses an automatic granulator for drainage opening materials, which relates to the technical field of zipper production and processing, and comprises a powder box, a first cutting part, a feeding wheel and a second cutting part, and the first cutting part is fixedly arranged in the powder box; the feeding wheel is rotationally arranged in the powder box and located on one side of the first cutting piece. The second cutting piece is rotatably arranged in the powder box, and the second cutting piece is located below the first cutting piece and the feeding wheel; when the feeding wheel rotates, the water gap material is driven to move from the position between the first cutting piece and the feeding wheel to the second cutting piece, and when the second cutting piece rotates, the first cutting piece is matched to cut off the water gap material. According to the automatic granulator for the drainage opening materials, the drainage opening materials are cut into sections through cooperation of the first cutting piece and the second cutting piece, the cut drainage opening materials are consistent in length, the automation degree of cutting operation is high, and the overall machining efficiency can be improved.

A rotor manufacturing device includes a sprue configured to be connected to a nozzle of an injection device, gates, and a runner portion connecting the sprue and the gates. The runner portion includes flow passages. Each of the flow passages includes two first portions respectively extending from two of the gates, and a second portion connected to the two first portions and extending from the first portions to an upstream side in a flowing direction of the resin material. In each of the flow passages, at least one of the two first portions is connected to one of two first portions of one of the flow passages that is adjacent in the circumferential direction.

The invention relates to the technical field of full mold casting, and provides a lost foam casting method for a thin lower mold insert type casting, which comprises the following steps of: firstly, processing a foam model, and carrying out quantity increasing, hole processing and connecting rib adding on the foam model to prevent the defects of deformation and shrinkage porosity of a shrinkage cavity; then the model is placed on an anti-deformation support which is provided with a check block and has the thickness of 50-100 mm, and deformation generated in the molding sand burying process is avoided; then a bottom pouring type pouring system is arranged, one inner pouring gate is arranged at the thin position of the model, the inner pouring gate keeps away from the drilling position, a straight pouring gate is arranged at the end, and it is guaranteed that molten iron is rapidly and stably filled into the model; then, CAE simulation is carried out, defects are eliminated, positions where shrinkage cavities and shrinkage porosity possibly occur are positioned, sand isolation chillers and inner chillers are arranged, the chilling effect is enhanced, and shrinkage cavities and shrinkage porosity are avoided; then carrying out shower coating operation, drying and then reinforcing; then modeling is conducted, and pouring is conducted after modeling; and then stress relief annealing is carried out, and finally shot blasting is carried out to remove redundant paste.

The utility model belongs to the technical field of ball valve casting, and particularly relates to a ball valve vertical casting system which comprises a base. A rotating assembly is arranged on the side wall of the bottom of the base. The side wall of the top of the rotating assembly is slidably connected with a movable seat. The pair of movable seats is symmetrically arranged at the top of the base; a valve body mold is fixedly connected to the side wall of the top of the movable base. A plurality of open risers are fixedly connected to the side wall of the top of the valve body mold; the middle part of the side wall of the open riser is fixedly connected with an outer pouring gate; by arranging the blind riser, the sprue, the cross gate and the ingate, when molten metal in a valve body mold is solidified and contracted, enough molten metal can be provided for supplement, meanwhile, smooth discharge of gas and inclusions in the casting process of the molten metal is facilitated, the conditions of air holes, inclusions and the like of a cast ball valve are reduced, and the service life of the ball valve is prolonged. Defects such as shrinkage cavities and shrinkage porosity in the ball valve are prevented, sand washing of the ball valve is guaranteed, the upper wall and the lower wall are uniform in thickness, and the quality of the ball valve is improved.

The utility model provides an in-mold inoculation block, and relates to the technical field of casting. The sand mold comprises a block body, a mold cavity is formed in the sand mold, a straight pouring hole used for injecting molten iron into the mold cavity is formed in the cavity wall of the mold cavity, and the block body is arranged on the inner wall of the straight pouring hole. According to the in-mold inoculation device, it can be guaranteed that the molten iron around the in-mold inoculation block is always kept at the high temperature, so that the phenomenon that the in-mold inoculation block is not completely melted is not likely to occur, and then the good inoculation effect on the molten iron in the sand mold is achieved.