27results about How to "Improve degassing effect" patented technology

The invention relates to a method and device for pressure centrifugal casting of a copper alloy cast ring, and belongs to the technical field of metal centrifugal casting. The method for pressure centrifugal casting of the copper alloy cast ring comprises the following steps that S1, pressure reduction smelting is conducted, specifically, a packaged vacuum smelting chamber is subjected to air exhaust and pressure reduction to be in a pressure vacuum state, and a mother alloy cast ingot is molten in the pressure vacuum state to form a melt; s2, centrifugal casting is conducted, specifically, the melt flows into a centrifugal casting mold of a vacuum centrifugal casting chamber, and the melt rotates under the centrifugal effect; and S3, pressurizing and solidifying: after the overflowing of the melt is completed, keeping rotation, opening an air charging device to introduce protective gas into the heat preserving furnace for pressurizing, and keeping the air pressure constant until the melt is completely solidified. According to the method for casting the copper alloy cast ring, composition segregation and the percentage of defective parts are reduced to a large extent, the turning amount is greatly reduced, the comprehensive yield and the production efficiency of the copper alloy are improved, meanwhile, material loss is reduced, and the production cost is reduced.

The invention relates to the technical field of extremely high vacuum acquisition, in particular to a process for reducing the surface air output rate of ferrite. The process comprises the steps of S1, pretreatment, S2, high-temperature degassing and S3, aftertreatment. Wherein the step S2 of high-temperature degassing comprises the following steps: placing the ferrite in a degassing furnace; vacuumizing the degassing furnace; starting a heating system of the degassing furnace, heating the ferrite to 500-600 DEG C at the heating rate of 1-2 DEG C / min, preserving heat for 0.5-1 hour, heating to 850-900 DEG C at the heating rate of 1-2 DEG C / min, preserving heat for 1-2 hours, cooling to 300-500 DEG C at the cooling rate of 1-2 DEG C / min, closing the heating system, and cooling the ferrite along with the furnace. According to the process, the surface gas outlet rate of the ferrite can be effectively reduced, the ferrite can be used for an extremely high vacuum system of 10 <-10 > Pa, and meanwhile, the situation that the ferrite is cracked and damaged in the degassing process can be avoided.

The invention discloses a casting device for a mine car balance suspension shaft shell, and belongs to the field of metal casting. Comprising a base, an X-axis moving part connected to one side of the base, a Z-axis moving part fixedly connected to one side of the moving end of the X-axis moving part, a tilting part fixedly connected to one side of the moving end of the Z-axis moving part, and a supporting frame fixedly connected to one side of the rotating end of the tilting part. The mounting plate is connected to one side of the base and is used for fixing a mold; the mold splitting and closing part is used for realizing mold closing and mold splitting; the first Venturi mixing part can mix inert gas and a degassing agent discharged from the first discharging pipe, the inert gas and the degassing agent are fed into the first porous spray head through a hollow pipeline, and the mixture is sprayed out of the first porous spray head at the bottom of a steel ladle so that the degassing agent can chemically react with gas (especially hydrogen) in molten metal. And dissolved gases such as hydrogen and nitrogen in molten metal are effectively removed, the metal quality is improved, the solubility of the gases is reduced, and the gases are separated out and discharged.

A crucible loading device includes an outer frame comprising a weighing sensor mounting platform and a set of weighing sensor mounting platform support legs; a material cylinder and a set of weighing mechanisms; a feeding pipe; a crucible conveying mechanism connecting bracket located below the weighing sensor mounting platform; a crucible feeding mechanism located on the upper part of the crucible conveying mechanism connecting bracket; a crucible feeding pipe fixing plate opening and closing drive mechanism located on the upper rear side of the crucible conveying mechanism connecting bracket; a degassing screw mechanism, a valve plate connecting plate, an assembled dust suction hood, a set of feeding opening and closing valve plates, and a set of feeding opening and closing valve plate actuation mechanisms; a stirring screw drive mechanism located in the center of the material cylinder cover; and a stirring screw. The device is characterized by further including a degassing actuator, a dust suction actuator, and a cylinder cavity material loosening and stirring mechanism. The degassing actuator is located on the material cylinder cover. The degassing screw mechanism includes upper and lower degassing screws and upper and lower degassing screw filter sleeves. This allows for convenient and quick removal of the stirring screw from the bottom, ensuring effective degassing of the material.

The utility model discloses a degassing device and a sedimentation tank thereof, and belongs to the technical field of sewage treatment.The degassing device comprises a top layer degassing structure and a bottom layer degassing structure which are arranged in a layered mode, the top layer degassing structure comprises a top layer gas-collecting hood and a top layer exhaust pipe arranged at the top of the top layer gas-collecting hood, and the bottom layer degassing structure comprises a bottom layer exhaust pipe arranged at the bottom of the bottom layer gas-collecting hood. The bottom-layer degassing structure comprises a bottom-layer gas-collecting hood and a bottom-layer exhaust pipe arranged at the top of the bottom-layer gas-collecting hood, an exhaust port of the top-layer exhaust pipe and an exhaust port of the bottom-layer exhaust pipe are both higher than the sewage liquid level, and the top-layer gas-collecting hood is located above the bottom-layer gas-collecting hood; and the top-layer gas-collecting hoods and the bottom-layer gas-collecting hoods are arranged in a staggered manner in the horizontal direction. According to the utility model, the top-layer degassing structure and the bottom-layer degassing structure are arranged in a layered manner, and the top-layer gas collecting hoods and the bottom-layer gas collecting hoods are arranged in a staggered manner in the horizontal direction, so that multi-stage degassing of sewage can be realized, the degassing effect is improved, and the precipitation effect is further improved.

The invention discloses a modified organic silicon defoaming agent as well as a preparation method and application thereof, and belongs to the field of papermaking defoaming agents. The preparation method comprises the following steps: firstly, carrying out addition reaction on hydrogen-containing silicone oil, alkyne and enol to obtain an alkyne modified organic silicon defoaming agent intermediate; performing high-temperature phase inversion emulsification on the alkyne modified organic silicon defoaming agent, docosanol, octadecanol and an emulsifier to obtain the alkyne modified organic silicon defoaming agent. The modified organic silicon defoaming agent obtained by the preparation method disclosed by the invention is applied to a papermaking section, not only can quickly eliminate foams on the surface of a system, but also can remove small bubbles attached to the surfaces of fine fibers in pulp, so that the gas content of a paper machine system is reduced, the operation efficiency of a paper machine is improved, and the modified organic silicon defoaming agent has the characteristics of no toxicity, no harm, simple process and the like.

The application discloses a degassing device for aluminum water processing in a reflection furnace, and relates to the technical field of degassing devices. The degassing device comprises a moving part, a gas storage tank arranged on the moving part, a transmission pipe arranged on the gas storage tank, a control valve arranged on the gas storage tank and used for controlling gas to enter the transmission pipe, and the transmission pipe extends into a reaction furnace. A shunt pipe is arranged on a side of the transmission pipe away from the gas storage tank and is connected to the transmission pipe. A plurality of jet heads are arranged on the shunt pipe at intervals and are connected to the shunt pipe. The degassing device can improve the hydrogen removal effect in aluminum liquid.

The utility model provides an efficient degassing system for aerobic granular sludge based on internal circulation degassing, which relates to the field of biological sewage treatment and comprises an aerobic reactor and an internal circulation degassing unit, the aerobic reactor is provided with a water inlet and an effluent weir, and an aerator is arranged inside the aerobic reactor; the internal circulation degassing unit comprises a degassing cylinder and a gas collecting cover arranged above the degassing cylinder, a guide cylinder is arranged in the degassing cylinder, the guide cylinder is opened up and down, the upper part of the guide cylinder is an inlet and is connected with an effluent weir through a guide pipe, a guide sheet is arranged in the guide cylinder, and an inclined baffle fixed on the inner wall of the degassing cylinder is arranged on the outer side of the guide cylinder; a water outlet in the upper part of the degassing cylinder is connected with the water inlet through a circulating pump; the degassing cylinder is communicated with the reactor through the flow guide pipe, the degassed sludge returns to the reactor through the circulating pump to form a closed loop, and through multi-mechanism collaborative degassing, the problem of particle floating caused by bubble adhesion, air bag and floc entrainment can be effectively solved, and the degassing effect is good.

The utility model relates to a heat preservation device and degassing equipment. The heat preservation device comprises a plurality of mounting blocks, a plurality of connecting pieces and a plurality of heat preservation structures. The mounting blocks are hollow, and a heat preservation structure is arranged in each mounting block; each installation block is provided with a connecting piece so that the multiple installation blocks can be connected or separated from one another, the multiple installation blocks are connected with one another to define a hollow structure with a through opening, and the multiple installation blocks are arranged around the through opening. By adopting the heat preservation device and the degassing equipment, when the quartz tube is degassed, the quartz tube can be arranged in the through hole, and the plurality of mounting blocks are arranged between the quartz tube and the inner wall of the muffle furnace, so that a gap between the quartz tube and the muffle furnace is filled. Meanwhile, the heat preservation structure is arranged in each mounting block, and the multiple mounting blocks are arranged around the through opening, so that the multiple mounting blocks are arranged around the quartz tube, heat preservation can be conducted on the quartz tube, excessive heat loss of the quartz tube is avoided, and the good degassing effect is guaranteed.

The utility model discloses a sulfolane refining device which comprises a vacuum degassing tower, an activated carbon filter, a processing bracket, a transfer box, a transfer structure and a stirring and feeding structure, and relates to the technical field of sulfolane production, the activated carbon filter can effectively remove organic matters, peculiar smell, colors and some chemical substances in liquid; the working principle is based on the adsorption capacity of activated carbon and the highly porous surface area, and a large number of attachment points are provided for impurities, so that the high efficiency of filtration is ensured; through automatic conveying devices such as a transfer structure, a transfer box and a stirring L-shaped drainage tube, accurate control and continuous flowing of liquid are achieved, and complexity and errors of manual operation are reduced; a stirring system consisting of a stirring driver, a stirring driving disc, a stirring magnet, a stirring conduction metal rod and the like can realize high-speed rotary stirring of raw material liquid, so that uniform mixing is ensured, and the reaction efficiency is improved.

The invention discloses a device and method for degassing an expansion water tank, comprising a degassing pipe and an expansion water tank, wherein the front end of the degassing pipe extends into the expansion water tank for a certain length, the pipe body of the degassing pipe extending into the expansion water tank serves as an insertion end, and the pipe body exposed outside the expansion water tank serves as a connecting end; the insertion end is provided with a speed regulating and guiding structure. The invention has the advantages of simple structure, easy improvement, low cost, etc.

The utility model belongs to the technical field of tower plate structures, and particularly relates to a multi-stage honeycomb-distributed crude oil vacuum degassing tower plate structure, which comprises a shell, an external vacuum device for forming a vacuum environment inside the shell, and an inner cavity of the shell is sequentially provided with an input pipe, an output pipe, a gas inlet pipe, a gas outlet pipe and a gas outlet pipe from top to bottom, the honeycomb tower plate assembly increases the contact area of crude oil and a vacuum environment. Through the systematic layout of the shell, the input pipe, the honeycomb tower plate assembly, the stirring mechanism and the discharging pipe, a complete crude oil vacuum degassing system is constructed; the external vacuum device enables a vacuum environment to be formed in the shell and provides driving force for degassing; the honeycomb tower plate assembly can increase the contact area between the crude oil and the vacuum environment, so that the crude oil can be better subjected to degassing reaction; the stirring mechanism can crush bubbles in crude oil, so that the mass transfer efficiency is improved; all the parts work cooperatively, and the problems that traditional degassing equipment is low in efficiency and high in energy consumption are effectively solved.

The utility model discloses a fishery breeding water treatment device which comprises a degassing tower, a plurality of air chambers, a plurality of oxygen pipes, oxygen supply equipment, a water spraying pipe and a receiving tank, the upper end of the degassing tower is open, the side wall of the degassing tower is provided with an air inlet, and the air chambers are arranged below the degassing tower and communicated with the degassing tower; an oxygen inlet and an oxygen outlet are formed in the side wall of the air chamber; one end of the oxygen pipe is connected with an oxygen outlet of one air chamber, the other end of the oxygen pipe is connected with an oxygen inlet of the other air chamber, and all the air chambers are sequentially communicated through the oxygen pipe; the oxygen supply equipment is connected with the oxygen inlet on the first air chamber in the plurality of air chambers which are sequentially communicated through an oxygen inlet pipe and is used for supplying oxygen to the air chambers; the water spraying pipe is arranged at the top end of the degassing tower and is used for spraying water downwards; the receiving pool is arranged at the lower end of the air chamber and used for receiving water flowing down from the air chamber, and a water outlet is formed in the bottom of the receiving pool and used for draining water. According to the water treatment device for fishery breeding provided by the utility model, the degassing equipment and the oxygenation equipment are longitudinally stacked, so that the occupied area is small, and the degassing and oxygenation effects are good.

The present invention discloses a molten aluminum dehydrogenation device, which relates to the technical field of molten aluminum dehydrogenation, and solves the problem that the injection method of the existing molten aluminum dehydrogenation device during use is difficult to further increase the number of inert gas bubbles, and at the same time, it is difficult to maintain the flow state of the molten aluminum. The molten aluminum dehydrogenation device includes a device barrel, a gas injection structure, a mixing component and a driving component; in the present invention, the inert gas is allowed to enter the interior of a circular cavity through the provided gas injection structure, and then the driving component is used to drive the mixing component, so that the mixing component breaks the high-speed rotating rotor of the inert gas into countless small bubbles, and the small bubbles diffuse and rise in the molten aluminum, thereby removing hydrogen. At the same time, the entire device is shared by a number of circular cavities, and a number of molten aluminum is contained in each of the circular cavities, so that the dehydrogenation treatment of the molten aluminum is more refined, and combined with the stirring effect of the mixing component in the circular cavity, the alloy component in the molten aluminum is more uniform.

The invention relates to the technical field of aluminum alloy materials, in particular to a high-impact-resistance aluminum alloy and a preparation method thereof.The high-impact-resistance aluminum alloy comprises, by mass, 0.03%-0.15% of silicon, 0.03%-0.15% of aluminum, 0.05%-0.15% of silicon, 0.05%-0.15% of silicon, 0.05%-0.15% of silicon, 0.05%-0.15% of silicon, 0.05 4.2%-4.4% of copper; 0.01 to 0.05 percent of chromium; 0.8 to 1.0 percent of magnesium; 0.05 to 0.08% of zinc; 0.7%-0.9% of manganese; 0.15%-0.25% of niobium; 0.01 to 0.05 percent of strontium; 0.08% to 0.12% of zirconium; 0.01 to 0.05 percent of titanium; 0.2 to 0.25 percent of rare earth elements; less than 0.12% of impurity iron; other impurity elements are less than 0.1%; and the balance of aluminum. The rare earth elements comprise cerium, scandium, yttrium and erbium. The prepared aluminum alloy has high strength and high impact resistance at the same time.

The utility model provides a molten aluminum refining degassing pipe. The molten aluminum refining degassing pipe comprises an upper pipe, a lower pipe and a connecting part, the upper end of the lower pipe sleeves the outer side of the upper pipe and is in sliding fit with the outer side surface of the upper pipe; a through hole is formed close to the lower end of the lower pipe; the connecting part comprises a fixed box and a moving part, the fixed box is fixed to the outer side of the upper pipe, an iron sheet is arranged on the upper side face of the fixed box, the moving part is fixed to the outer side wall of the upper end of the lower pipe, and a magnet is arranged on the moving part; the moving part is arranged in the fixed box. According to the utility model, the blowing range is expanded, the uniformity is ensured, and the degassing effect is better. It is ensured that the distance between the through hole and the furnace bottom is 10-15 cm, it is ensured that the blowing position is standard, the blowing precision is improved, and the molten aluminum refining degassing effect is ensured.

The invention belongs to the technical field of preparation of non-ferrous metal materials, and particularly relates to a medium-frequency smelting method for an extrusion ingot for reducing black lines of anodized aluminum. The method comprises the following steps: mixing various components of an aluminum alloy, then smelting at 720-750°C, placing the smelted aluminum alloy in a medium-frequency furnace for refining, wherein the refining comprises refining agent refining and argon refining; the refining agent refining comprises the following steps: adding a refining agent to the smelted aluminum alloy, wherein the medium gas is argon gas, heating the medium-frequency furnace for a period of time, closing the medium-frequency furnace, and standing for a total of at least 10 minutes, and then slagging; after the argon refining is completed, standing for at least 5 minutes, and then slagging; the method can reduce the hydrogen content, improve the effect of the aluminum alloy after anodizing treatment, and especially reduce the phenomenon of black lines of anodized aluminum.

The present invention belongs to the technical field of sewage treatment, and in particular to a phase-change deoxygenation and deammoniation device and method based on sewage treatment. In view of the fact that wastewater is difficult to completely contact with the phase-change deoxygenation wire during the flow of wastewater, thereby affecting the deoxygenation effect during the deoxygenation operation, and further affecting the operation and safety of the equipment, the following scheme is proposed, including a shell, both ends of the shell are provided with end shells, one side outer wall of the two end shells is fixedly connected with a purge pipe, and one end of the two purge pipes is fixedly connected with a purge gas bin. A phase-change deoxygenation and deammoniation device and method based on sewage treatment disclosed by the present invention has the function of increasing the sewage treatment effect. When in use, the device can disturb the wastewater inside the sewage pipe bin to increase the contact effect between the wastewater and the deoxygenation wire body when the wastewater flows, thereby increasing the degassing effect of the deoxygenation wire on oxygen and ammonia gas in the wastewater, and increasing the use effect of the device.

The invention discloses an environment-friendly water-based drilling fluid suitable for tight gas as well as a preparation method and application thereof, and relates to the technical field of oil and gas field drilling, the environment-friendly water-based drilling fluid comprises the following components: bentonite slurry, sodium hydroxide, xanthan gum, a zwitterionic polymer coating agent, a filtrate reducer, a plugging agent, an inhibitor, potassium chloride, a lubricant, a defoaming agent, a viscosity reducer and barite. The preparation cost is low, the wide application of the environment-friendly water-based drilling fluid is promoted, and the environment-friendly treatment agent for the environment-friendly water-based drilling fluid suitable for tight gas is completely environment-friendly; the lubricating oil has excellent rheological filtration property, lubricating property and sedimentation stability; the water-based drilling fluid has the advantages that the water-based drilling fluid has excellent temperature-resistant stability, the fluctuation of the rheological property along with the temperature rise is small, meanwhile, the water-based drilling fluid system has excellent gas cut prevention capability and degassing effect, and the system performance is stable in the continuous methane injection process; the shale inhibitor has excellent inhibition performance and reservoir protection performance, and can effectively inhibit hydration and dispersion of shale.

The present invention relates to a polypropylene process powder degassing system, comprising: a reaction discharge line and a powder degassing system connected to the reaction discharge line, wherein the powder degassing system comprises an expansion bag filter, a degassing bin, a steam tank and a drying tank connected in sequence, wherein one end of the reaction discharge line is connected to the reactor, and the other end is connected to the middle of the expansion bag filter, the bottom discharge port of the expansion bag filter is connected to the top feed port of the degassing bin through a first pipeline, the bottom discharge port of the degassing bin is connected to the top feed port of the steam tank through a second pipeline, and the bottom discharge port of the steam tank is connected to the top feed port of the drying tank through a third pipeline. The degassing effect is good, and heavy hydrocarbon impurities such as hydrocarbons, benzenes, aldehydes, and ketones in the product can be effectively removed.

The application relates to the technical field of casting, and discloses a medium-frequency furnace smelting degassing and deslagging device capable of reducing the slag inclusion defects of castings, which comprises a base, a medium-frequency furnace, a first driving motor, a first cleaning mechanism, a transfer mechanism, a second cleaning mechanism, a fan, a speed reduction gear set and a powder dropping mechanism, one end of the base is rotationally connected with the medium-frequency furnace, a fan is arranged above the medium-frequency furnace, the fan is installed on the base, and the other end of the base is provided with the second cleaning mechanism. The application realizes synchronous scraping and stirring by triggering feeding through sliding travel mechanical scraping, the fan drives the first rotating frame to rotate at low speed through the speed reduction gear set, the fan can automatically switch air supply or air exhaust according to the operation stage, the requirements of accelerating the fusion of deslagging agents and smoke exhaust are realized, the triangular column transmits the power of the fan and cooperates with the fan-shaped groove to ensure that the second scraper and the first scraper are accurately positioned through self-cleaning, the whole process is automatically connected, manual intervention is not needed, and the operation strength is reduced.

This invention provides a process for preparing a recycled polypropylene degassing membrane and the recycled polypropylene degassing membrane, comprising the following process steps: S1, mixing and granulation: extruding and granulating polypropylene raw materials with a recycled polypropylene mass ratio of 55wt%-75wt% to obtain raw material particles; S2, melt spinning; S3, cooling and film formation: firstly, passing through an air section with a length of 30-100mm and a temperature of 5-10℃ for outer surface pre-cooling; then, passing the semi-solid membrane fibers sequentially through an air section with a length of 300-1000mm and a temperature of 80-100℃ for heat preservation and cooling, and then through an air section with a length of 300-1000mm and a temperature of 30-50℃ for natural cooling to obtain nascent membrane fibers; S4, corona treatment; S5, stretching and pore formation; S6, heat setting treatment: heat setting the stretched membrane fibers under heat treatment conditions of 120-140℃, heat treatment time of 30-40min, and stretching ratio of 1-3% to obtain finished membrane fibers. This invention uses recycled polypropylene granules as raw material to produce a polypropylene degassing membrane that combines high air permeability, low leaching, and long service life.

The utility model provides a degassing machine for an alloy melting furnace, which aims to solve the problem that the gas removal effect is influenced as part of gas is difficult to discharge due to the fact that a large amount of alloy solution is accumulated together and the gas in the solution is not uniformly distributed during stirring, and comprises a degassing box, a stirring degassing assembly, a gas discharging assembly and a gas discharging assembly, comprising a motor installed above a degassing box, a rotating rod arranged at the output end of the motor and a degassing structure arranged outside the rotating rod, and the bottom end of the rotating rod penetrates through the degassing box and extends to the bottom of the degassing box. Through cooperation of a motor, a rotating rod, a flow guide plate, a leakage groove, a first push plate and a second push plate, by means of work of the motor, the first push plate can stir an alloy solution flowing on the flow guide plate for first exhaust, the exhausted alloy solution can flow downwards from the leakage groove, and the second push plate can stir and exhaust the alloy solution again; and therefore, the effect of discharging the gas in the alloy solution is ensured.

This utility model discloses an environmentally friendly adhesive centrifugal degassing device, including a protective box. A turntable is installed in the middle of the protective box, and a servo motor is installed in the middle of the bottom of the protective box. A centrifugal frame is fixed on the upper end of the turntable, and the centrifugal frame has inclined structures at both ends. The beneficial effects are: this utility model, by setting four sets of protective support mechanisms composed of limiting rods, limiting seats, and limiting wheels on the outside of the rotating cylinder, ensures the rotation performance of the rotating cylinder during centrifugal degassing. It also provides auxiliary support to the rotating cylinder, preventing uneven wear at the connection between the cylinder and the centrifugal frame due to uneven force caused by the cylinder being suspended in the air. This ensures the stability of the cylinder during rotation, resulting in not only good degassing effect but also long service life and strong functionality, exhibiting high performance.

The vacuum degassing device comprises a box body, an opening is formed in the top face of the box body, a lifting heating device is installed at the opening in a matched mode, a negative pressure detection device is arranged on the box body beside the opening, a horizontal flow groove is formed in the back position of the box body, and meanwhile a first gate plate and a second gate plate which are spaced and provided with encoders are installed on the flow groove; a dust removal device and a vacuum generation device are installed on one side of the box body, a liquid level detection device is further installed on one side of the box body, a rocker arm is installed on the other side of the box body through a supporting frame, the end of the rocker arm is fixed to the middle of the top face of the door cover, the front end face of the box body is open, and the opening and the door cover are sealed through a sealing device. A baffle is fixed to the middle of the bottom inside the box body, a distance is reserved between the top face of the baffle and the inner top face of the box body, graphite spinors are installed on the two sides of the baffle respectively, and spinor driving devices of the graphite spinors are arranged on the bottom face of the box body. And the degassing effect is improved, and the quality of aluminum processing products is improved.

The utility model relates to the technical field of casting equipment, and provides a spinning liquid copper water casting device for semi-continuous casting, which comprises a casting pipe, a tee joint, a threaded hole, a cavity and a through hole, one end of the casting pipe is provided with a threaded head, the threaded hole is arranged in the center of the tee joint, and the cavity is arranged in the through hole. A threaded hole is formed in the tee joint, a threaded head on the casting pipe is in threaded connection with the threaded hole, the casting pipe is hollow, the cavity is formed in the tee joint, and the through hole is formed in the face, facing the casting pipe, of the tee joint; the cavity is formed in the tee joint, the four arc-shaped through holes are evenly formed in the tee joint, molten copper enters the cavity from the casting pipe and flows out of the cavity in the tee joint towards the four arc-shaped through holes, and the molten copper flowing out of the through holes slightly spins in a crystallizer cavity and is subjected to flow dividing treatment through the four through holes; the impact force is weakened when the molten copper is discharged, so that the discharging process is stable, and the stability of the molten copper discharging process is beneficial to uniform distribution of the molten copper.

The present invention addresses the problem of providing an electromagnetic wave shielding sheet, a printed wiring board with the electromagnetic wave shielding sheet, and an electronic device that do not peel off during press working and have excellent transmission characteristics, shielding properties, and degassing properties. An electromagnetic wave shielding sheet in which a protective layer, a conductive layer, and an adhesive layer are laminated in this order, the conductive layer comprising a metal filler and an adhesive, the electromagnetic wave shielding sheet having a peel force of 50-2500 [gf / 25 mm] when cohesive failure occurs in the conductive layer when a peel test is performed at a peel angle of 180 DEG and a peel speed of 300 mm / min between the protective layer and the adhesive layer, and the electromagnetic wave shielding sheet having an electromagnetic wave shielding effect, in the peeling test, the cohesive failure rate of the conductive layer is 10% or more.