32results about How to "Prevent bridging" patented technology

The invention discloses a screw rod extruder for producing flame-retardant master batches, and belongs to the technical field of extruders, the screw rod extruder comprises a screw rod extruder main body, the upper part of the screw rod extruder main body is fixedly connected with a square pipe, the upper part of the square pipe is fixedly connected with a blanking pipe, the upper side of the blanking pipe is provided with a conical barrel hopper, and the bottom of the conical barrel hopper is provided with a blanking port; a sealing cover is fixedly connected to the upper portion of the conical barrel hopper, a feeding port is formed in the sealing cover, a conical valve assembly is movably connected into the discharging port in a sealed mode, an electric push rod is fixedly connected to the center of the upper portion of the sealing cover, and the output end of the electric push rod movably penetrates through the sealing cover and is connected with the conical valve assembly. When the conical valve assembly ascends to open the discharging port and discharges powder, after the conical valve assembly moves by a certain distance and stops moving, the upper portion of the conical valve assembly can continue to ascend, the powder can be fully discharged, and the phenomenon that the discharging port is blocked or bridged due to the fact that the powder is compacted is avoided.

The utility model relates to nylon production granulating technology field, concretely relates to a granulator for nylon production, include: cutting table, conveying mechanism, cutting mechanism are installed on cutting table in turn along material flow direction, the utility model discloses a kind of granulator for new nylon production, by setting dredging component, by the directional airflow injection of rotary nozzle, in roll cutter operating area construction local cooling field, effectively eliminate the residual thermal stress inside particle, avoid the melting bonding phenomenon between particles due to thermoplastic material characteristics, simultaneously, during the rotation of rotating rod, the abutting block cam structure configured to its surface and the protrusion of the bottom of shaking plate occur periodic contact, the reciprocating vibration of shaking plate is realized by cam-spring composite mechanism, the vibration effect makes the nylon particles accumulated on the surface of shaking plate obtain initial kinetic energy, under the coupling action of gravity and vibration, along the orderly flow of the surface of pre-set inclination angle, effectively prevent bridging and adhesion phenomenon of particle in the process of collecting material.

This utility model belongs to the technical field of three-dimensional dryers, and discloses a storage structure for a detachable three-dimensional dryer. It includes a storage hopper with an open top, and a long, narrow discharge port at the bottom of the hopper. Below the discharge port, the hopper has a material dispersing mechanism, which includes a material dispersing frame mounted directly below the discharge port via a positioning frame. The material dispersing frame has inclined ramps on both sides. Multiple horizontally arranged support frames are provided on the outside of the hopper, with positioning seats at the ends. Corresponding supports are provided on the inner wall of the three-dimensional dryer, and the positioning seats are fixed to the supports with bolts. An anti-bridging mechanism is also provided inside the hopper. This utility model ensures sufficient contact between the material and the hot air inside the three-dimensional dryer, resulting in better drying effect, improved heat utilization of the hot air, and reduced energy consumption.

This disclosure relates to a semiconductor packaging apparatus and a method for manufacturing the same. The semiconductor packaging apparatus includes: a first circuit layer with a first conductive element disposed on its surface; a second circuit layer with a second conductive element disposed on its surface; the first conductive element and the second conductive element are electrically connected via at least two connecting lines. This semiconductor packaging apparatus effectively avoids problems of electrical connection disconnection and bridging between adjacent conductive elements, effectively reducing the risk of electrical connection failure between circuit layers and thus improving product yield.

The application relates to the technical field of valves, in particular to a high-temperature material flow regulating device and a control method thereof, which comprises a device body, a spring hanger fixed on the device body, an inlet and return water system, a control system, a monitoring device and a connecting pipe fixed on a discharge port of the device body. The device is aimed at the problems of poor linearity of traditional gate valves and flap valves, insufficient precision of manual regulation and open-loop control, realizes linear regulation of high-temperature material flow through the curved surface fitting design of a valve head and a valve seat, completely solves the disadvantages of small opening sensitivity and large opening sluggishness, accurately adapts to trace regulation requirements, relies on the monitoring device to collect material level and temperature signals in real time, constructs a closed-loop control through a PLC control system, automatically drives an electric actuator to adjust the position of a valve rod, does not need manual intervention, avoids human judgment errors, eliminates high-temperature scene operation safety hazards, greatly improves flow control precision and stability, and solves the problem of instability of a traditional control loop.

This invention discloses a feeding device for the production of hydroxyapatite powder, aiming to solve the problems of uneven feeding, clogging, and dust pollution caused by the poor flowability and easy agglomeration of this type of powder. The device includes a frame, a feeding channel, a crushing device and a dust removal assembly located within the channel. The crushing device includes a fixed rod and a movable crushing shovel driven by a drive assembly, effectively preventing material bridging and agglomeration through active, reciprocating crushing action. The dust removal assembly includes a suction chamber, a filter screen, and a cleaning roller brush. When the crushing shovel moves, this mechanism can be periodically actuated, driving the cleaning roller brush to automatically clean the dust accumulated on the filter screen. This invention cleverly combines active crushing with a mechanically linked self-cleaning dust removal function, eliminating the need for an additional power source for the cleaning function. Its compact structure enables uniform, stable, and dust-free feeding, effectively improving production efficiency and environmental quality.

The utility model provides a production device that can improve the flowability of silicon carbide fine powder relates to silicon carbide production technical field, the utility model discloses a hopper, the hopper is installed at the feed inlet of silicon carbide fine powder processing equipment, the stirring device sets up inside the hopper, wherein the stirring device can be stirred to the silicon carbide fine powder in the hopper, the stirring device includes motor, the motor is installed in the circular arc surface of hopper, the motor has the gear with the help of speed reducer fixed connection, the circular arc surface of hopper is rotatably connected with the gear ring, wherein the gear ring and the gear are interlocked, two the cleaning plate sets up inside the hopper, wherein the cleaning plate and the inner wall of hopper mutually fit, the utility model is through the first stirring board of stirring device setting vertical rotation in the hopper, has reached the effect of loosening to the silicon carbide fine powder, avoids the silicon carbide fine powder in the hopper to appear the bridging phenomenon, thereby influences the normal unloading condition of silicon carbide fine powder to take place.

The utility model discloses an anti-blocking and anti-hanging blanking groove device which comprises a blanking groove body, the top of the blanking groove body is connected with a feeding hopper, the bottom of the blanking groove body is connected with a discharging groove, and a discharging groove is formed in the blanking groove body. The anti-blocking assembly is arranged between the discharging groove and the discharging groove body, and the anti-blocking assembly comprises an equipment box, a gear motor, a driving rod, a cam and a movable plate; and the material hanging prevention assembly is arranged in the discharging groove body, and the material hanging prevention assembly comprises a heating cavity, a heater, an equipment cavity and an air extracting pump. According to the utility model, through the arrangement of the anti-blocking component, the area of the discharge port area is dynamically changed, the caked materials are extruded and sheared, the crushing capacity is enhanced, the materials are prevented from bridging, through the arrangement of the anti-wall-hanging component, the materials are kept dry, the flowability of the materials is improved, and the adhered materials are continuously stripped in cooperation with a wall-adhering airflow layer blown out by the flat nozzle.

This invention relates to the field of rare earth electrolysis processes, specifically to an oxide feeding control system and its control method, comprising: an oxide feeding device and a control module. The oxide feeding device includes a first hopper and a second hopper located below the first hopper. A control valve is installed between the first and second hoppers. A feeding mechanism is installed below the second hopper, and a loss-in-weight detection scale is installed at the bottom of the second hopper. The control valve includes a valve body, a drive motor, and a transmission component. A valve core is connected to the end of the transmission component. A spring is installed on the side wall of the valve body located below the valve core. A first vibration sensor is provided at one end of the spring near the side wall. The control module is electrically connected to the drive motor, the loss-in-weight detection scale, the first vibration sensor, and the second vibration sensor. When the second hopper is filled to more than 70% of the target weight, the speed of the motor auger is reduced. This invention reduces the impact on the sensors to an acceptable range, thereby achieving precise control.

This invention discloses a loss-in-weight scale for improving weighing accuracy; relating to the field of loss-in-weight scale technology, it includes a support frame, a tank, and a tank cover. Multiple equidistant pressure sensors are installed on the periphery of the top surface of the support frame. A quantitative transmission mechanism is provided at the lower end of the tank, and a balancing component is installed on the upper end of the tank cover. This invention significantly improves weighing accuracy through the symmetrical arrangement of pressure sensors and a stable force transmission structure. Multiple equidistant pressure sensors installed on the periphery of the top surface of the support frame are rigidly connected to the tank through a positioning plate, ensuring that the weight of the tank is evenly transmitted to each sensor, avoiding detection deviations caused by single-point force. Simultaneously, the fixing effect of the positioning plate reduces interference from tank shaking to the sensors, making the weight signal more stable. The quantitative transmission mechanism of this invention achieves stable material transport through the synergistic effect of stirring and double-headed spiral pushing. By optimizing the material diversion and guiding structure, residue inside the tank and transport deviations are reduced, further improving measurement accuracy.

The utility model relates to the technical field of injection molding machines, and particularly discloses an injection molding raw material feeding system which comprises a supporting frame and a quantitative storage bin arranged on the outer wall of the supporting frame in a sliding and sleeving mode, a plurality of independent feeding bins are evenly distributed on the circumference of the top of the quantitative storage bin, and the bottoms of all the feeding bins are connected with a feeding barrel through discharging pipes. The open end of the feeding cylinder communicates with a feeding cylinder, the top of the quantitative storage bin communicates with a plurality of material guiding cylinders, and the outer wall of the lower end of the feeding cylinder is sleeved with the material guiding cylinders. A baffle used for opening and closing the open end of the feeding barrel is arranged in the feeding barrel, and an electric telescopic rod used for driving the baffle to move is arranged on the outer wall of the feeding barrel. Gravity sensors which are uniformly distributed on the circumference are arranged on the support frame and are fixedly connected with the quantitative storage bin through a connecting frame; and through precise quantitative feeding, intelligent anti-blocking homogenization and high-stability structural design, automatic and efficient matching of multiple raw materials is achieved, and the injection molding production quality and efficiency are remarkably improved.

This utility model discloses a spray desulfurization device and a shaking furnace for use in a shaking furnace. The desulfurization device includes a spray gun and a mixing hopper. The spray gun is connected to the mixing hopper through a spray pipe. The spray gun includes a spray section and a connecting section. The top end of the spray section is connected to the bottom end of the connecting section, and a nozzle is connected to the bottom end of the spray section. A rack is provided on the connecting section, and a drive gear is meshed on the rack. The drive gear is connected to a first drive motor. An annular gas distribution pipe is provided inside the mixing hopper, and a gasification pipe is provided on the annular gas distribution pipe. The annular gas distribution pipe is connected to an external gas source through a gas supply pipe. A feed pipe is provided on the mixing hopper. In this utility model, after the desulfurizing agent is put into the mixing hopper, the carrier gas is sprayed out from the gasification pipe, so that the desulfurizing agent is fluidized for spraying and feeding, improving the uniformity of feeding. During feeding, the rack is driven to rise and fall by the first drive motor, so that the desulfurizing agent is sprayed and released at different depths in the shaking furnace, expanding the reaction area and avoiding the desulfurizing agent being concentrated only on the surface of the shaking furnace or at a fixed depth, thereby improving the desulfurization efficiency.

The utility model discloses an automatic castable batching device, and belongs to the technical field of castable production equipment. The automatic castable batching device comprises a bottom plate, an electronic weighing table is installed at the top end of the bottom plate, a material collecting barrel is installed at the top end of the electronic weighing table, a plurality of material storage barrels are arranged on the outer side of the material collecting barrel, a discharging pipe is installed at the bottom end of each material storage barrel, a conveying pipe is installed at the bottom end of each discharging pipe, and a pair of supporting seats is installed at the bottom end of each conveying pipe. A transverse plate is installed at the bottom end of the supporting seat, a pair of supporting frames are installed at the bottom end of the transverse plate, the bottom ends of the supporting frames are fixedly connected with the top end of the bottom plate, a conveying shaft is rotationally connected to the inner side of the conveying pipe, the outer side of the conveying shaft is sleeved with a spiral blade, one end of the conveying pipe extends to the top end of the storage barrel, and an anti-blocking mechanism is arranged in the storage barrel. The auxiliary discharging device can effectively achieve the auxiliary discharging function, prevents materials from being accumulated and blocked in the hopper, and has high practical value.

This utility model discloses a contamination-proof sealed capsule / tablet dispensing device, relating to the field of capsule / tablet dispensing technology. The utility model includes an operating table, a feeding assembly, and a conveying assembly. The operating table includes a sealing cover, an inlet / outlet, a baffle curtain, a fan, and four ultraviolet lamps. The feeding assembly includes a storage bin, a bin lid, a slot, a sealing ring, a first fixing block, a second fixing block, a threaded rod, and a knob. By setting the sealing cover and bin lid, specifically, capsules or tablets to be dispensed are added to the storage bin, then the bin lid is closed. Rotating the knob causes the threaded rod to screw into the first and second fixing blocks, pressing the sealing ring into the slot, thus sealing the bin lid. Then, the fan and ultraviolet lamps are activated. The fan forms an air curtain at the inlet / outlet, which, together with the baffle curtain, prevents dust from entering. The ultraviolet lamps sterilize the inside of the sealing cover, ensuring high cleanliness during the drug dispensing process and solving the problem of drug contamination easily caused by the dispensing path in existing dispensing devices.

The utility model discloses a feeding and discharging system of a vacuum drier. The feeding and discharging system comprises a liquid ring vacuum pump, the liquid ring vacuum pump is communicated with a feeding header pipe and a discharging header pipe, the feeding header pipe is communicated with the top of the feeding balance stirring tank through a feeding emptying branch pipe, and the feeding header pipe is communicated with the top of the raw material tank through a feeding balance pipe; and the discharging header pipe is communicated with the top of the discharging balance stirring tank through a discharging emptying branch pipe and is communicated with the vacuum double-paddle drying machine through a discharging balance pipe. The system has the advantages that by controlling the opening and closing sequence of the valves in the system and designing vacuum pressure balance in the system, stable feeding and discharging processes are realized, material leakage and waste are reduced, and meanwhile, the safety of the production process is ensured. According to production requirements, the size of material particles can be accurately controlled by adjusting the rotating speed of the discharging crusher, different process requirements are met, and the product quality is improved.

The cable sheath extrusion molding feeding equipment comprises a mounting seat, a rack, a mixing tank, a cover body, a feeding pipe, a driving motor and the like, the rack is arranged on the upper portion of the mounting seat, the mixing tank is arranged on the upper portion in the rack, the mixing tank is integrally in a big-end-up cone shape, the cover body is arranged on the top of the mixing tank in a closed mode, and the feeding pipe is arranged on the cover body. The bottom of the cover body is connected and communicated with a discharging pipe, at least one feeding pipe is arranged on the cover body and communicated with the internal space of the mixing tank, and a driving motor is arranged at the top of the cover body. Through the mixing tank and the storage hopper, particle raw materials can be premixed in the feeding stage, the storage hopper receives the premixed raw materials discharged by the mixing tank and temporarily stores the premixed raw materials, and meanwhile, the premixed raw materials are orderly conveyed from the mixing tank to the storage hopper and then to an external plastic extruding machine in cooperation with the material passing valve set, the conveying pipe, the spiral conveying piece and the like in the discharging pipe; and the problem of material breakage caused by traditional manual mixed material transfer is effectively avoided, and the continuous extrusion molding process is guaranteed.

The utility model discloses an anti-blocking discharging device, and relates to the technical field of discharging devices. The feeding device comprises a first discharging hopper, the top of the first discharging hopper is connected with a feeding channel, and a material door assembly is arranged in the feeding channel and used for controlling opening and closing of the feeding channel; and the second discharging hopper is communicated with the bottom of the first discharging hopper, a bridge breaking device is arranged in the second discharging hopper, and bridged materials are scattered through the bridge breaking device. By adding the material bridge breaking device, materials about to be bridged in the second discharging hopper can be scattered, the materials are prevented from bridging, then the materials are further loosened through the multiple arch breaking devices, the flowing state of the materials is restored, the materials can be conveniently output from the discharging channel through the auger conveying assembly, and the material conveying efficiency is improved. Through mutual cooperation of the structures, materials with poor fluidity can be smoothly conveyed into the extruder, continuous production is not prone to being affected, and use is better.

The present application relates to sludge treatment technical field, disclose a kind of suitable for river embankment sludge stirring mixing device, including base, the upper side of the base is fixed with stirring cylinder, the inside rotation of the stirring cylinder is connected with stirring assembly one, the upper side of the stirring cylinder is fixed with feed pipe and cylinder cover, the outer wall of the feed pipe is fixed with motor two, one side of the feed pipe is fixed with storage tank, the lower side of the storage tank is fixed with discharging shell, the inside sliding connection of the discharging shell has pusher piston, the lower side sliding connection of the storage tank has guide block. By reciprocating movement of pusher piston, curing agent in storage tank is transported to feed pipe and sludge mixing, and by the action of guide block, curing agent in storage tank is pushed out, so as to solve the problem that in prior art, when adding solid curing agent, it is easy to block, leading to the use range is limited by the state of curing agent, poor adaptability.

The present application belongs to the field of honeycomb forming, and relates to a method for preventing R-angle bridging of a honeycomb sandwich part. The method comprises the following steps: cutting prepreg: cutting honeycomb lower skin prepreg and honeycomb upper skin prepreg into square zigzag shapes with anti-skid belt tethering area; the space between the square zigzags is used for tethering the anti-skid belt; laying the pieces in turn in the order of blank pages, and then carrying out honeycomb cutting, layering, paste vacuum bagging and curing.

This invention relates to the field of plastic recycling technology, and specifically discloses a twin-screw extruder for granulation of recycled waste plastics. The extruder includes a working platform, a first motor fixedly connected to the top of the working platform, a first drive gear fixedly connected to the drive shaft of the first motor, and first driven gears meshing on both sides of the first drive gear. A mounting beam is fixedly connected to the top of the support frame, and an electrostatic separation device is connected through and fixedly to the top of the mounting beam. An extrusion device is connected through and fixedly to the end of the barrel furthest from the first motor. This twin-screw extruder for granulation of recycled waste plastics is equipped with a quantitative feeding device to prevent material accumulation and bridging, thus improving production stability. The electrostatic separation device removes impurities from the material, preventing screw wear caused by impurities and reducing safety hazards.

The utility model belongs to the technical field of extruders, and discloses a feeding device for a polypropylene extruder, which comprises an extruder and a blanking box, a discharge pipe is arranged at the bottom of the blanking box, the discharge pipe is communicated with the extruder, a connecting ring rotatably connected with the discharge pipe is arranged on the inner side of the discharge pipe, and a servo motor is arranged on the outer side of the discharge pipe. The outer side of the connecting ring is sleeved with a gear ring, an output shaft of the servo motor is provided with a gear, the gear is meshed with the gear ring, a moving rod is arranged on the top face of the connecting ring, and the moving rod rotates along with the connecting ring. The servo motor drives the connecting ring to rotate, and the connecting ring drives the moving rod to stir raw materials from the inside, so that the problem of bridging of the polypropylene raw materials in the blanking box is avoided, and the blanking continuity is guaranteed.

The utility model provides a servo labor and material machine capable of improving the feeding accuracy of glass raw materials, and relates to the technical field of servo labor and material machines, the servo labor and material machine comprises a vibration auxiliary feeding assembly and a group of first support frames, the vibration auxiliary feeding assembly is arranged on one side of the outer wall of the group of first support frames; the vibration auxiliary feeding assembly comprises a set of second supporting frames, two supporting bases are connected to the tops of the set of second supporting frames through bolts, the vibration auxiliary feeding assembly is arranged, vibration generated by a vibrator can enable materials to be kept in a loose state, and therefore the agglomeration and bridging phenomena are prevented, and the feeding efficiency is improved. According to the feeding device, materials can stably and continuously enter the screw, inaccurate feeding amount caused by feeding interruption or unsmoothness is avoided, friction force between the materials and the wall of the hopper can be overcome through vibration, the materials are made to enter a screw groove of the screw from the feeding port more easily, the materials can enter a feeding machine more rapidly and evenly under the action of gravity and vibration, and the feeding efficiency is improved. Therefore, the feeding stability and precision are improved.

The utility model discloses a calcium-based reaction heat removal device which sequentially comprises a CaO reactor, a settler and a heat recoverer, a reaction area, a first boiler tube and a first overheating heat exchanger are arranged in the CaO reactor; a first fluidizing gas inlet is formed in the bottom of the CaO reactor; a reactor outlet is formed in the top of the CaO reactor; a settler inlet is formed in the top of the settler and is communicated with the reactor outlet; a settling area, a second boiler tube and a first water-cooling coil are arranged in the settler; the water cooling coil pipe is arranged at the downstream of the settlement area; a second fluidizing gas inlet is formed in the bottom of the settler; a heat recoverer inlet is formed in the top of the heat recoverer; the heat recoverer inlet is communicated with the settler outlet; a third boiler tube and a second water-cooling coil are arranged in the heat recoverer; and a fluidizing gas outlet is formed in the side wall of the bottom of the heat recoverer. The calcium-based reaction heat removal device is high in heat recovery rate.

This utility model relates to the technical field of melamine tableware production equipment, and discloses a quantitative feeding device for raw materials in melamine tableware production. The device includes a base plate, a discharge pipe fixedly connected to the top of the base plate via a support block, a spiral feeding rod fixedly connected to the left side of the first drive rod, a discharge port on the left side of the discharge pipe, a load-bearing plate fixedly connected to the top of the base plate, and an annular baffle fixedly connected to the top of the load-bearing plate. In this utility model, by starting the first servo motor, the spiral feeding rod transports the powder raw material along the conveying pipe to the discharge port, where it falls into the load-bearing plate. A weight sensor detects the weight of the powder in the load-bearing plate in real time. Once the set value is reached, the device stops working, completing one quantitative feeding cycle. This utility model uses a controller to open a solenoid valve and simultaneously starts the second servo motor, causing the stirring rod and scraper to rotate, preventing powder bridging, clumping, and adhesion to the walls, ensuring that the powder falls smoothly into the conveying pipe.

The invention discloses a metal powder injection molding device of a linear guide rail pair sliding block, and relates to the technical field of injection molding, the metal powder injection molding device comprises a bottom plate, a conveying cylinder is arranged on the upper portion of the bottom plate, and a driving motor used for driving a spiral conveying rod in the conveying cylinder to rotate is installed at one end of the conveying cylinder; and an injection head is arranged at the other end of the conveying cylinder, one end of the injection head is connected with a formed part mechanism, a feeding port is formed in the upper portion of one end of the conveying cylinder, and an anti-bridging mechanism is installed in the feeding port. According to the metal powder injection molding device of the linear guide rail pair sliding block, a spiral conveying rod in a conveying cylinder is driven by a driving motor to convey materials, and meanwhile an output shaft of the motor drives a rotating shaft arranged in a feeding port to rotate through a driving wheel, a belt and a driven wheel; and the stirring rods distributed on the rotating shaft can continuously stir the materials in the feeding hole, so that the materials are effectively prevented from accumulating in the feeding hole and forming a bridging phenomenon, and the smooth blanking of the materials is ensured.

A method for manufacturing a semiconductor device includes: providing an interlayer dielectric layer, with a core layer formed above the interlayer dielectric layer; etching the core layer to form an opening penetrating the core layer; forming sidewall layers on sidewalls on both sides of the opening along a first direction; forming a fill layer between the sidewall layers to fill the opening, the fill layer being made of a different material than the sidewall layers; etching the core layer and sidewall layers on both sides of the fill layer along the first direction to form a first metal line pattern truncated by the fill layer in the core layer, the first metal line pattern extending along the first direction; and etching the interlayer dielectric layer based on the core layer to form a first trench having a truncated region. This invention enables the achievement of smaller end-to-end truncation dimensions for metal lines.

This invention relates to the field of powder conveying equipment technology. It comprises a silo bottom plate, a geared motor, an output shaft, a support sleeve, a skeleton sealing ring, a conical activator, a flange, stirring blades, and a discharge port. The geared motor is installed at the bottom of the silo bottom plate. A hole is formed in the center of the silo bottom plate, and a support sleeve is fixed inside the hole. A skeleton sealing ring is installed between the support sleeve and the silo bottom plate. The output shaft of the geared motor passes through the support sleeve and is rotatably connected to the support sleeve via a bearing. A flange is fixed to the output shaft, and a conical activator is fixed to the flange. Several stirring blades are fixed to the outer circumference of the flange. Several discharge ports are provided on the silo bottom plate. The conical stirring anti-bridging device of this invention, with its conical shape of the conical activator combined with the stirring rotation of the blades, effectively prevents material bridging, exhibiting excellent anti-bridging effect, thus making material conveying in automated conveying equipment such as pneumatic conveyors or screw conveyors smoother.

This invention discloses a silent scrubbing method for exhaust gas from the production of phosphorus-nitrogen flame retardants, belonging to the field of phosphorus-nitrogen flame retardant production. The method includes the following steps: S1, the exhaust gas after dust removal enters the primary scrubbing tower tangentially from the bottom, is scrubbed by the sprayed liquid to form post-primary scrubbing exhaust gas, and exits the primary scrubbing tower tangentially from the top; S2, the post-primary scrubbing exhaust gas enters the secondary scrubbing tower tangentially from the bottom, is scrubbed by the sprayed liquid to form post-secondary scrubbing exhaust gas, and exits the secondary scrubbing tower tangentially from the top. This invention removes ammonium polyphosphate dust entrained in the preceding exhaust gas, improves the ammonia absorption rate in the exhaust gas, and reduces noise.

The application relates to the technical field of component packaging, in particular to a multi-component SMT mounting method based on RDL rewiring, a product and electronic equipment, which comprises the following steps: S1, selecting to-be-mounted components, wherein a component group comprises a first component and a second component; S2, mounting a chip, an independent component and the first component in the component group on initial pads, then performing first plastic packaging to obtain a preliminary component; S3, drilling holes in the positions of the pads where the components are not mounted on the preliminary product, then performing metal deposition and filling on the drilled holes to realize electrical connection, and obtaining an intermediate component with lead-out copper columns; S4, performing RDL rewiring on the surface of the plastic packaging body of the lead-out copper columns of the intermediate component; and S5, welding the second component and performing plastic packaging to obtain a finished component. The application meets the welding requirements of multiple components without changing the original size of the product, and avoids bridging between components caused by insufficient space.

The invention discloses an integrated batching system for neodymium iron boron production, and belongs to the technical field of neodymium iron boron production. The system comprises a plurality of material storage cylinders which are annularly distributed, a material mixing cylinder positioned below the material storage cylinders and a gas storage tank positioned in the center. And the gas storage tank, the material storage barrel and the material mixing barrel are connected through a pipeline to form an inert gas circulation loop. The storage barrel is of a conical barrel structure, a telescopic exhaust pipe is arranged in the center of the storage barrel, and the bottom of the storage barrel is connected with a discharging mechanism. Inert gas enters the material storage barrel from the gas storage pump to form cyclone airflow, so that the materials are effectively prevented from adhering to the wall and bridging; air flow is guided into a hollow auger shaft rod of the discharging mechanism through an exhaust pipe, finally enters the mixing barrel and returns to the air storage tank, and whole-process inert protection is achieved. The system is high in integration level, the problems of oxidation, bonding and bridging of rare earth raw materials in the storage and conveying process are solved, and the batching precision and the product purity are remarkably improved.