187 results about "Viscous material" patented technology

The invention relates to the technical field of material weighing, in particular to a viscous material weighing control method and system. The method comprises the following steps: acquiring material weight data, valve opening data and valve response time which are acquired when the current viscous material is discharged by using a discharging valve; on the basis of the material weight data and the valve opening degree data, the material instantaneous flow rate and the material dynamic flow parameters are determined; based on the material instantaneous flow, the material dynamic flow parameters, the valve response time and the preset material weight, the material outflow amount after the valve is closed is determined; and based on the material outflow amount and the preset material weight, a control result for closing the discharging valve is determined. The objective of the invention is to solve the problems that the blanking amount of materials is difficult to accurately control and the blanking precision of the materials is low when the materials are weighed in the prior art.

The utility model discloses a combined belt conveyor wet-type cleaning device with water mist assistance, which is applied to a belt conveyor body, vertical rods are symmetrically arranged at the top of the belt conveyor body, adjusting mechanisms are arranged on one sides of the vertical rods, a concave frame is arranged between the adjusting mechanisms, a conveying mechanism is arranged in an inner cavity of the concave frame, and the conveying mechanism is connected with the belt conveyor body. A conveying mechanism is arranged on the front surface of the vertical rod, a cleaning mechanism is arranged below the conveying mechanism, a spraying mechanism is arranged in the middle of the front surface of the vertical rod, and the multiple mechanisms such as the adjusting mechanism, the conveying mechanism, the cleaning mechanism, the spraying mechanism, the supplying and conveying mechanism and the scraping mechanism are matched in an assisting mode; the cleaning efficiency is remarkably improved, the combined cleaning structure enables the cleaning efficiency to be improved to 99% or above, the residue amount is smaller than 50 g / m < 2 >, the efficiency is far higher than 85% of a traditional cleaning device, adaptability is high, various viscous materials (such as wet coal and ore pulp) can be treated, and the problem that the traditional cleaning device cannot thoroughly clean the high-humidity and high-viscosity materials is solved.

A filling method is disclosed in which a robot arm moves a discharge port to a first position in a first recessed portion, and at the first position, a discharge of the viscous material is started. After the discharge of the viscous material is started, the discharge of the viscous material is stopped. In a state where the discharge of the viscous material is stopped, the robot arm moves the discharge port above the first recessed portion. In a state where the discharge of the viscous material is stopped, the robot arm moves the discharge port to a second position in the first recessed portion by moving the discharge port in the horizontal direction and then moving the discharge port downward along the vertical direction, or by moving the discharge port obliquely downward. At the second position, the discharge of the viscous material from the discharge port is started.

The utility model provides a pipeline filter for viscous materials, which comprises a filter shell, two ends of the filter shell are respectively provided with a feed port and a discharge port, the feed port and the discharge port are correspondingly provided with a feed flange, a discharge flange and a filter element support, the pipeline filter comprises a filter element outer cylinder, the side surface of the filter element outer cylinder is provided with holes, and the holes are communicated with the filter element outer cylinder. A supporting flange is arranged at one end of the filter element outer cylinder, the other end of the filter element outer cylinder forms a closed end, the closed end of the filter element support is inserted into the filter element outer cylinder through a feeding flange, and the supporting flange is connected with the feeding flange through a bolt; the filter element comprises a filter element framework and a filter screen, the filter element framework comprises two oppositely arranged rings, a plurality of supporting ribs are arranged between the two rings, the supporting ribs are arranged in the circumferential direction of the two rings, the filter screen is arranged in a space defined by the supporting ribs and attached to the supporting ribs, and the filter element is inserted into the filter element outer cylinder through the supporting flange. The filter screen is supported by the filter screen framework, deformation of the filter screen can be reduced, the filter element framework and the filter screen are directly taken out when the filter element is replaced, and replacement is convenient.

The invention discloses a compressed air ore washing vibrating screen, and relates to the technical field of ore washing screening. The compressed air ore washing vibrating screen comprises a fixing seat, the outer wall of the fixing seat is fixedly connected with a vibrating mechanism, the vibrating mechanism comprises a mounting seat, a vibrating component and a first spring, the mounting seat is fixedly connected with the outer wall of the fixing seat, the outer wall of the vibrating component is fixedly connected with the outer wall of the mounting seat, and the first spring is fixedly connected with the mounting seat. The first spring is fixedly connected between the mounting seat and the fixed seat, the top of the mounting seat is fixedly connected with the rotating plate, and the top of the rotating plate is rotatably connected with a V-shaped rod. According to the compressed air ore washing vibrating screen, by arranging the rotatable V-shaped rod and the inclined mounting base, ore can roll along with shaking of the V-shaped rod in the screening process, retention and caking of viscous materials at the screen holes are reduced, and meanwhile, the materials can be guided to rapidly slide into a second recycling box through the inclined angle design of the V-shaped rod.

The invention discloses a viscous material filling method which comprises the following steps: a wire breaking stage: after filling is finished, a filling needle stays for a first set time T1, then an ejector pin descends to cut off an outlet of the filling needle, a sealing sleeve ascends to be separated from a container, and meanwhile, the filling needle and the ejector pin ascend to a set position below an inlet of the container and stays for a set time T2. The filling needle stays for the first set time, and the viscous material at the outlet of the filling needle can continuously flow into the container, so that the accuracy of the filling quantity is improved, and the wire drawing is reduced. The ejector pin descends to cut off an outlet of the filling needle, materials in the filling needle are cut off, the sealing sleeve ascends to damage the vacuum environment in the container, meanwhile, the filling needle and the ejector pin ascend, and the good wire breaking effect can be achieved through the combination of the three means that the ejector pin descends to cut off the outlet of the filling needle. The filling needle and the ejector pin ascend to set positions and stay for set duration, so that some very fine drawn wires can be automatically disconnected under the action of gravity, and the situation that laminar flow wind outside a container blows away the fine drawn wires and attaches the fine drawn wires to an inlet of the container, and consequently products are unqualified is avoided.

The utility model discloses an oil and gas storage and transportation tank body cleaning device, which relates to the technical field of oil and gas storage and transportation tanks, and comprises an oil and gas storage and transportation tank body, the top of the oil and gas storage and transportation tank body is provided with a sealing pipeline, and the outer surfaces of the left side and the right side of the oil and gas storage and transportation tank body are respectively provided with a cleaning assembly. An inner cavity of the mounting box is connected with a rotating rod, the outer surface of the rotating rod is movably connected with a moving plate, and the outer surface of the moving plate is slidably connected with the inner cavity of the mounting box. According to the technical scheme, the cleaning assembly is arranged, so that the comprehensiveness and adaptability of cleaning operation are effectively improved. According to the cleaning assembly, the inner wall, the bottom curved surface area and the bottom of the tank body can be evenly cleaned without dead corners, and the cleaning efficiency and quality are remarkably improved; meanwhile, after cleaning is completed, the sweeping assembly can be rapidly separated from the inner wall of the tank body through the adjusting structure, and the adhesion problem caused by residual oil stains or viscous substances is avoided.

The application discloses compressed air ore washing vibrating screen and relates to the technical field of ore washing and screening. The compressed air ore washing vibrating screen comprises a fixing base, the outer wall of the fixing base is fixedly connected with a vibrating mechanism, the vibrating mechanism comprises a mounting base, the mounting base is fixedly connected with the outer wall of the fixing base, a vibrating part, the outer wall of the vibrating part is fixedly connected with the outer wall of the mounting base, a first spring, the first spring is fixedly connected between the mounting base and the fixing base, a rotating plate, the top of the mounting base is fixedly connected with the rotating plate, and the top of the rotating plate is rotatably connected with a V-shaped rod. The compressed air ore washing vibrating screen is provided with the rotatable V-shaped rod and the inclined mounting base, so that the ore can roll along with the shaking of the V-shaped rod during the screening process, the retention and caking of viscous materials at the screen hole are reduced, and meanwhile, the inclination angle of the V-shaped rod can guide the materials to quickly slide to the second recycling box.

The invention relates to the technical field of viscous materials, in particular to a low-temperature-resistant viscous material for a high-altitude damper. Comprising the following components: 30-50 parts of silicone rubber; 50-60 parts of modified silicone rubber; 10 to 30 parts of polar rubber; 20 to 50 parts of modified white carbon black; 10 to 40 parts of high rubber powder; 10 to 20 parts of a crosslinking accelerator; 10 to 50 parts of organic silicon elastomer micro powder; 1 to 3 parts of diphenyl silanediol; 1-5 parts of phenyl silicone oil; 1-5 parts of a damping agent; and 1 to 2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane. The prepared low-temperature-resistant viscous material can keep stable viscosity at an extremely low temperature, improves the adaptability in a wide temperature range, has efficient energy consumption capacity, has small influence on the structure, has excellent weather resistance, and can meet the requirement of low maintenance.

The utility model discloses a filter sieve device suitable for egg powder, which comprises a machine body provided with a blanking hopper, and the blanking hopper is provided with an upper feed port and a lower discharge port; the transverse sliding rails are installed on the machine body and located on the front side and the rear side of the upper feeding opening; the filter screen frame is mounted on the transverse sliding rails through sliding blocks, and a screen is mounted on the filter screen frame; the driving connecting rods are mounted at one end of the filter screen frame through bolt handles, are arranged on the front side and the rear side respectively and correspond to the transverse sliding rails; and the transmission belt wheel assembly is used for driving the driving connecting rod, so that the filter screen frame reciprocates on the transverse sliding rail. The connecting rod is driven by the transmission belt wheel assembly, so that the whole filter screen frame reciprocates on the transverse sliding rail, the amplitude is enlarged, the material dispersion is increased, and the egg powder screening device is more suitable for screening egg powder of viscous materials, simple in structure, convenient to operate and wide in applicability.

Rheometry systems for use with systems including pressurized polymer melt and / or other viscous materials are described. In one embodiment, a rheometer is connected to an associated system having a bent, curved, or bendable tube to allow the rheometer to measure rheological properties at a location that would otherwise be inaccessible to position the rheometer there due to the presence of an obstruction. Embodiments including rigid straight tubes for connecting the rheometer to the associated system are also described. In another embodiment, a flow-through rheometer is connected to an industry standard 1 / 2-20 thermowell orifice, which is commonly used to attach temperature and pressure probes to vessels containing viscous materials, such as extruders or injection molding systems.

The present invention provides a vibration suppression device that can effectively suppress the pressure rise of a viscous material even when a viscous material with relatively high viscosity is flowing at high speed, by ensuring that the viscous material passes sufficiently through the flow path of the relief valve. [Solution] In the vibration suppression device of the present invention, the relative displacement between the first and second parts that occurs in conjunction with the vibration of the object to be suppressed is converted into relative rotation between the outer cylinder 3 and the inner cylinder 4 connected to the screw shaft 2a and nut 2b of the ball screw 2, and the vibration suppression effect is exerted by the shear resistance of the viscous material VB filled in the viscous chamber 5 between the two cylinders 3 and 4. The external relief mechanism 6 is connected to the viscous chamber 5 and has first and second communication passages 31 and 32 that extend to the outside of the outer cylinder 5, a relief valve 33 that opens when the pressure in the viscous chamber 5 reaches a predetermined relief pressure Prf and releases the pressure in the viscous chamber 5 from the first communication passage 31 to the second communication passage 32, and a check valve 34 provided in the second communication passage 32.

The utility model discloses a portable uniform feeder, which belongs to the technical field of material conveying equipment and comprises a material storing, crushing and stirring device and a feeding device. The material storing, crushing and stirring device comprises a stock bin and a crushing and stirring device; the crushing and stirring device comprises an upper-layer stirring blade and a lower-layer stirring blade which are arranged in the stock bin, and a first variable frequency motor arranged outside the stock bin; each of the upper-layer stirring blade and the lower-layer stirring blade comprises a stirring blade shaft sleeve and a plurality of stirring blade bodies uniformly arranged on the stirring blade shaft sleeve; the upper-layer stirring blade body is trapezoidal, and the upper surface and the lower surface of the upper-layer stirring blade body are respectively provided with a plurality of stirring rods; the lower-layer stirring blade body is a curved blade; the feeding device comprises a spiral feeding auger and an adjusting device used for adjusting the material conveying angle of the spiral feeding auger. The utility model is suitable for various production environments requiring uniform and multi-material mixing, caked viscous material crushing and stable feeding, effectively improves the production efficiency, and reduces the production cost.

The utility model discloses mining slurry stirring equipment which comprises a mixing tank, a stirring device and a stirring device, wherein a mounting frame is connected to the lower part of the mixing tank; and the first mixing mechanism is connected to the interior of the mixing tank. A first driving motor drives a mixing frame on a first driving rod and a plurality of mixing rods to turn over materials in the forward direction, a second driving motor drives a first inclined material turning blade and a second inclined material turning blade on a second driving rod to turn over materials in the reverse direction, and due to the arrangement of a first mixing mechanism and a second mixing mechanism, the mixing directions are opposite; stirring is conducted from different angles and directions, the uniform mixing effect is improved, a third driving motor drives a plurality of smashing blades on a third driving rod to work, large or thick materials can be rapidly and effectively smashed, the situation that the materials form large blocks or agglomerates in the mixing process is avoided, the fluidity and the filling effect of slurry are improved, and the production efficiency is improved. Therefore, the overall efficiency and quality of slurry preparation are improved.

A device for conveying viscous material to an applicator has a conveying cylinder in which a double-acting conveying piston is movable to and fro. The conveying cylinder has first and second chambers separated from one another by the conveying piston. Each chamber has a material inlet and outlet. A conveying device is connected to the material inlets for the pressurized introduction of viscous material into the conveying cylinder chambers, and a valve device closes and opens the material inlets and outlets. In a first switching position, the valve device opens the first chamber material inlet and the second chamber material outlet and closes the second chamber material inlet and the first chamber material outlet and, in a second switching position, releases the second chamber material inlet and the first chamber material outlet and closes the first chamber material inlet and the second chamber material outlet.

The invention relates to a nozzle having a piercing projection for safe and efficient release of viscous material from a collapsible tube sealed at a front end and a rear end by tie clips when housed within a dispensing tool. The piercing projection extends from the nozzle interior surface. The piercing projection is arranged to pierce the front end of the collapsible tube along a tear line to form a flap of the collapsible tube to which the front end tie clip remains attached. An upstanding wall extends from the nozzle interior surface to define a retention shelf between the upstanding wall and the nozzle interior surface. The retention shelf is configured to receive and retain therein the flap and the front end tie clip during dispensing to enable unobstructed flow of the viscous material through the dispensing end opening.

The utility model relates to the technical field of material conveying equipment, in particular to a mixing bin with a guide cone, which comprises a bin body, a mixing pipe and the guide cone, the mixing pipe is arranged on the inner wall surface of the bin body, two cavity channels are arranged in the mixing pipe, the guide cone is arranged at the bottom of the bin body, and the guide cone is arranged on the inner wall surface of the bin body. And an adjustable gap is reserved between the feeding hopper and the inner wall of the bin body so as to control the discharging amount. The technical problem that a mixing pipeline is easily blocked by viscous materials in a wall-attached pipe type mixing bin in the prior art is solved.

The invention discloses a bulk mineral aggregate efficient automatic weighing, metering, unloading and loading platform which comprises a hopper frame and an unloading hopper installed on the hopper frame, a weight sensor is arranged on the unloading hopper, a rotary unblocking device is arranged in the unloading hopper, and a hopper door is arranged at the bottom of the unloading hopper. A vehicle recognition device, a positioning radar, a material level detection radar and a vehicle tail recognition light curtain are arranged on the hopper frame, and a controller and a reminding device are further arranged on the hopper frame. Automatic loading can be achieved, the loading capacity can be accurately controlled, overload violation is avoided, and meanwhile the maximum load mass utilization rate of a single vehicle is increased; the actual device mass is synchronously obtained in the loading process, the subsequent weighing link is reduced, and the efficiency of the whole process is improved; and meanwhile, the safety risk accompanied by the operation is also effectively reduced. And particularly, the fluidity of the viscous materials can be effectively improved through the rotary blockage clearing device, so that the requirement of continuous operation is met. The system can be widely applied to multi-scene automatic loading scenes of bulk ores, grains, chemical engineering and the like.

The present application relates to a kind of bulk carrier viscous material's cleaning process, specific steps include: S1, the bulk cargo stored in cargo hold is fed into the conveying belt located in the bottom of cargo hold by hydraulic control switch gate;S2, the material on the cargo hold wall is scraped from top to bottom by grab machine, multiple grab machines are recycled and cooperated with each other, so that the material adhered to the surface of the wall is uniformly transported to the conveying belt of discharge arm;S3, multiple high-pressure gas is circulated and hit to the cargo hold wall;S4, high-pressure water is injected into the cargo hold wall and the bottom of cargo hold, and the residual material on the cargo hold wall and the bottom of cargo hold is flushed;S5, the mixed material in the cargo hold and high-pressure water are pumped to the storage cylinder on deck by high-pressure pump, and solid-liquid separation is carried out in the storage cylinder;S6, multiple cargo hold air dryers are placed in the cargo hold, and the interior of the cargo hold is quickly dried and treated.The present application has the following advantages: the cleaning work of viscous material is quickly and efficiently realized, and the recovery rate of material is improved.

A nozzle for an applicator by which a flowable viscous material suitable for forming a liquid applied sound deadener can be distributed, the nozzle comprising: a proximal end releasably coupled to the applicator and having an end side in which a single proximal opening is formed; a distal end opposing the proximal end and having an end side in which a single distal opening is formed; and an interior hollow chamber defined between the proximal end and the distal end and in fluid communication with both the proximal opening and the distal opening, the nozzle being configured such that when being distributed by the nozzle, the flowable viscous material can be supplied from the proximal end to the distal end and discharged out of the distal opening, and the distal opening has a straight edge and a sawtooth-shaped or sine-shaped or wave-shaped edge opposing the straight edge.

To provide a dispenser that can shorten the cycle time of the viscous material coating process. [Solution] The first cylinder 51 has a filling port 52 in front of the discharge nozzle 54. The second cylinder 31 has a supply port 32 from which viscous material is supplied from the liquid storage tank 10, and is connected to the filling port 52 of the first cylinder 51 via a connecting passage 40 connected to a branching section 33. The first plunger 55 fills the filling port 52 with viscous material when retracted and discharges the viscous material from the discharge nozzle 54 when moving forward. The second plunger 35 supplies viscous material from the supply port 32 when retracted and fills the first cylinder 51 with viscous material via the connecting passage 40 when moving forward. The first switching valve 56 blocks the flow path to the discharge nozzle 54 when filling the first cylinder 51 and prevents backflow to the filling port 52 when discharging. The second switching valve 36 blocks the connecting passage 40 when supplying to the second cylinder 31 and prevents backflow to the supply port 32 when filling the first cylinder 51.

The utility model provides a vertical screw feeder belongs to the technical field of feeder, including feeder assembly, feeder assembly includes bottom plate, install the mounting seat on the bottom plate, the top of mounting seat is fixed with spiral feed pipe, the top of spiral feed pipe is linked with the feeding pipe, the surface of spiral feed pipe is fixed with mounting plate, install first drive motor on the bottom plate, the output of first drive motor is installed with first gear wheel. The utility model discloses through the setting of first gear wheel, second gear wheel, third gear wheel and fourth gear wheel, can drive first rotary column and second rotary column synchronous rotation simultaneously to drive shaftless screw conveyor blade synchronous rotation, through the setting of shaftless screw conveyor blade, can make viscous material delivery more smoothly, and shaftless screw conveyor blade operation can be with the operation of pipe wall sticking, can transport the material that sticks on the pipe wall together to water, improved use effect.

The invention discloses a device and method capable of accurately controlling the stacking angle of a two-dimensional material in an ultrahigh vacuum environment. The device comprises an ultra-vacuum cavity one-dimensional linear conveying rod and a rotatable sample frame, the rotatable sample frame comprises a sample table and a driving assembly, and the driving assembly is in transmission connection with the sample table and used for driving the sample table to rotate around the z axis of a three-dimensional coordinate system in the x-y plane of the three-dimensional coordinate system; the one-dimensional linear conveying rods are in sealing fit with the ultra-vacuum cavity, the working end of at least one one-dimensional linear conveying rod is arranged in the ultra-vacuum cavity, the working end of each one-dimensional linear conveying rod can fix a viscous material, the working end of each one-dimensional linear conveying rod points to the sample table, and in addition, the working end of each one-dimensional linear conveying rod is arranged in the sample table. And the working end of the at least one-dimensional linear transmission rod can move along the z axis of the three-dimensional coordinate system. In-situ cleavage and controllable stacking of the two-dimensional material in the ultrahigh vacuum environment can be achieved, by combining with the ultrahigh vacuum high-resolution characterization technology, the sample stacking angle is accurately controlled, meanwhile, pollution of samples in the atmospheric environment is avoided, and the cleanliness of the surfaces of the samples is guaranteed.

The utility model discloses a drainage device, and relates to the technical field of medical instruments for hepatobiliary surgery, in particular to a drainage device which comprises a hose, an unblocking component and a spring, the aperture of the spring is larger than the outer diameter of the hose, and the spring is arranged on the outer side wall of the hose in a sleeved mode. The spring is arranged on the outer side wall of the hose in a sleeving mode, the hose is externally supported through the spring, due to the fact that the spring has certain elasticity and rigidity, the spring can straighten the hose in time and prevent the hose from being excessively bent, the hose wall of the hose is prevented from being attached, a flow channel in the hose is prevented from being blocked or narrowed, and therefore the purpose of normal drainage is achieved. When a flow channel is blocked by viscous materials in the hose, the sliding blockage clearing component is pressed to slide in the length direction of the hose, the blockage clearing component extrudes the hose in the sliding process, and therefore the blocking materials in the hose are extruded and driven out, and the purpose of clearing away the viscous blocking materials in the hose is achieved.

This application provides a device for preventing material misalignment in a binary packaging valve of a color mixing machine and its usage method. The device includes a tank, a bag assembly disposed within the tank, a valve body disposed on the bag assembly, a discharge assembly disposed on the valve body, and a discharge component disposed between the valve body and the discharge assembly. The discharge assembly includes a valve seat disposed on the tank and a discharge nozzle disposed on the valve seat. The discharge component includes a first spring disposed between the discharge nozzle and the valve body. This device drives the discharge nozzle to approach the valve body and compress the first spring. The spring's elasticity, combined with the material's inertia, actively discharges residual material from the discharge nozzle, effectively preventing viscous material residue from adhering to the valve wall and solidifying, thus preventing material misalignment. It avoids the drawbacks of cumbersome, inefficient, and unstable manual cleaning procedures, improves the adaptability of the binary packaging valve to high-viscosity materials, and ensures the accuracy of material proportioning in the color mixing machine. It has the advantages of simple structure, high raw material utilization, convenient operation, and ease of promotion and implementation.

The utility model relates to the technical field of mixing devices, and discloses a mixing device capable of metering in a time-sharing manner and discharging in batches for stirring viscous materials, which comprises a bottom plate, the middle part of the upper surface of the bottom plate is fixedly connected with a mixing furnace, and the upper end of the outer wall of the mixing furnace is fixedly connected with a storage plate. When the mixing device for stirring the viscous materials is used, main materials are poured into the mixing furnace from the first feeding frame, the plc control panel is electrically connected with the first electromagnetic control valve, the second electromagnetic control valve and the servo motor so as to control on-off of the mixing furnace, and other needed materials are poured into the material storage barrels respectively, so that the mixing furnace is used for stirring the viscous materials. The first electromagnetic control valves can be sequentially and respectively opened according to requirements, materials in the material storage barrel are extracted through the feeding pipe of the metering pump along with the circulating pipe and are conveyed into the mixing furnace through the discharging pipe, and the flow and proportion of the materials can be accurately controlled according to the requirements through the metering pump.

The invention relates to a nozzle having a piercing projection for safe and efficient release of viscous material from a collapsible tube sealed at a front end and a rear end by tie clips when housed within a dispensing tool. The piercing projection extends from the nozzle interior surface. The piercing projection is arranged to pierce the front end of the collapsible tube along a tear line to form a flap of the collapsible tube to which the front end tie clip remains attached. An upstanding wall extends from the nozzle interior surface to define a retention shelf between the upstanding wall and the nozzle interior surface. The retention shelf is configured to receive and retain therein the flap and the front end tie clip during dispensing to enable unobstructed flow of the viscous material through the dispensing end opening.

The invention provides a filling method, a non-transitory storage medium storing a filling program, and a robot system. The filling method can uniformly and rapidly fill a first recess with an appropriate amount of viscous material. A filling method is characterized in that a robot arm moves a discharge port to a first position in a first recess, starts discharge of a viscous material from the discharge port at the first position, stops discharge of the viscous material after start of discharge of the viscous material, and stops discharge of the viscous material in a state where discharge of the viscous material is stopped. The robot arm moves the ejection port above the first recess in a state where the ejection of the viscous material is stopped, moves the ejection port in the horizontal direction, then descends in the vertical direction or moves obliquely downward to move to a second position within the first recess in a state where the ejection of the viscous material is stopped, and starts the ejection of the viscous material from the ejection port at the second position.

A double-roller sand making machine with a self-cleaning function comprises a rack of the double-roller sand making machine, a first roller wheel and a second roller wheel which are meshed with each other are installed in the rack, and self-cleaning devices are arranged on the side edges of the first roller wheel and the second roller wheel. The self-cleaning device comprises a water pump, the water pump is connected with a water spraying pipe through a pipeline, spraying holes are formed in the pipe wall of the water spraying pipe, and the water spraying pipe is parallel to the first roller and the second roller. The self-cleaning device is used for cleaning viscous materials adhered to the side edges of the first roller and the second roller, so that the viscous materials are prevented from adhering to the first roller and the second roller, and the sand making performance of the double-roller sand making machine is prevented from being influenced.