41results about How to "Easy flow control" patented technology

The invention relates to the technical field of annealing furnaces, in particular to a swirl injection type energy-saving annealing furnace. The device comprises outer shell plates and an air duct, the outer shell plates are spliced to form a hearth, the air duct is arranged in the outer shell plates to form an air path for convective circulation, the air duct is connected with a circulating fan, and air in the air duct and an inner cavity of the hearth is driven by the circulating fan to actively convectively circulate. The air direction of air convection circulation of the air channel faces the side face and the lower portion of the workpiece needing annealing, and a heat preservation layer is attached to the inner surface of the outer shell plate. The shell plate is used for supporting a main body structure of the furnace body, the air duct is used for achieving circulation convection of air flow, the annealing efficiency and the annealing quality of the metal coiled materials are improved through circulation convection of high-temperature air flow, the heat preservation layer is used for storing internal heat, reducing energy leakage and effectively reducing loss, and the circulation fan is used for providing power for circulation convection of the air flow.

The invention discloses a high-flux testing device for accurately testing the dynamic erosion corrosion performance of a material, which comprises a testing kettle, a rotating system, a liquid circulating system and a liquid collecting tank, the rotating system comprises a motor and a rotating blade, and the rotating blade is provided with a sample; the invention further discloses a testing method for high-flux accurate testing of the dynamic erosion corrosion performance of the material. The method comprises the step of injecting the corrosion solution to scour a sample. The rotation system is arranged to realize rotation of the sample, the test kettle and the liquid circulation system matched with the test kettle are arranged to realize erosion of the corrosion solution to the sample, the flow rate is controllable, the corrosion solution can be reused, and a plurality of samples can be subjected to long-time erosion corrosion test in the same environment and under different test conditions. The corrosion performance of the material under the same corrosion environment, different operation states and different temperatures is accurately obtained, so that the function of accurately testing the dynamic erosion corrosion performance at high flux is realized, and the testing device has the characteristics of high safety coefficient, convenience in operation and the like.

The invention discloses a test device and method for measuring residual gas of a coal sample based on a GC double-column method. The device comprises a high-purity hydrogen steel cylinder, a high-purity helium steel cylinder, a vacuum pump containing a vacuum gauge, a computer, and a liquid sealing coal sample tank, a sleeve type gas storage device and a gas chromatograph which are connected in sequence, a first heating thermocouple, an electromagnetic valve and a spherical grinding machine are arranged in the lower layer of the liquid sealing coal sample tank; a pressure gauge, a thermometer and a first flow sensor which are used for measuring gas are arranged at an outlet of the capacity-controllable sleeve type gas storage device; the gas chromatograph is provided with a sampling device, a double chromatographic column device, a double thermal conductivity detector, a second flow sensor and a temperature sensor which are connected in sequence; and a heating device is also arranged in the box body. According to the invention, double gas chromatographic columns and double thermal conductivity detectors are selected, the separation effect and detection effect of each component gas are more excellent, and the subsequently measured wave peak value and wave width are more accurate.

The invention provides a method for generating a pattern or an image on a cake by using an AI model, and the method at least comprises the following steps: providing a UI module for a user to input keywords and descriptions; generating an image of a black and white vector according to the input content by using an AI-based image module; processing the 2D image into a digital instruction through an image converter module; sending the digital instruction to a laser patterning module; and applying a pattern to the biscuit surface using a laser patterning module.

The present invention relates to the field of vacuum evaporation technology, and specifically to a coating steam vertical gas distribution device and a method of using the same, including a vacuum coating chamber and a gas distribution mechanism, the gas distribution mechanism is a vertical gas distribution mechanism, the upper part of a movable bracket is installed on both sides of the vertical gas distribution mechanism, a coating chamber sealing surface is provided on one side of the vacuum coating chamber connected to the vertical gas distribution mechanism, the vertical gas distribution mechanism is connected to the vacuum coating chamber through a gas distribution chamber flange to form a complete section of vacuum coating process equipment, the side of the vacuum coating chamber is provided with a coating chamber side connection flange, and multiple vacuum coating process equipment sections are connected through the coating chamber side connection flange to form various forms of equipment layout. The vertical gas distribution mechanism of the present invention realizes the change of the vertical upward steam flow form of the horizontal evaporator to the steam flow form that the horizontal evaporator can spray horizontally from side to side, solving the problem that the horizontal evaporator cannot spray sideways and distribute gas uniformly and can be adjusted up and down for the vertical substrate in the evaporation process.

The utility model discloses a pressure stabilizing control valve with a double-cavity structure, which comprises a valve body, two sides of the valve body are fixedly connected with connecting pipes, the inside of the valve body is fixedly connected with a partition plate, the inside of the partition plate is fixedly connected with a water through ring, and the top end of the valve body is movably connected with a mounting cylinder. According to the pressure stabilizing control valve of the double-cavity structure, the positioning base is arranged, a positioning bolt is rotated to be separated from the interior of a threaded hole after being used for a long time, then a positioning disc can be pulled to detach the mounting barrel from the top end of the valve body, and then a spring in the mounting barrel can be detached to be rapidly replaced; the situation that the pressure stability is affected by fatigue due to long-time work of the spring is prevented, after completion, the mounting cylinder is inserted into the positioning base, meanwhile, the positioning disc is attached to the top end of the positioning base, the positioning bolt penetrates through the positioning disc and then is rotated into the threaded hole, and therefore the mounting cylinder is positioned through the positioning disc, and the problem that the pressure value is not stable enough after long-time work is solved.

The utility model relates to the technical field of building water supply and drainage, and discloses a building water supply and drainage structure capable of switching water supply pipeline paths, which comprises a lower shell, the top of the lower shell is fixedly connected with an upper shell, the interior of the lower shell is fixedly connected with a main flow pipeline, one end of the main flow pipeline is fixedly connected with a branch flow pipeline, and the branch flow pipeline is fixedly connected with a water supply pipeline. And switching devices are fixedly connected to the two ends of the shunting pipeline. The device is fixedly installed by arranging the lower shell and the upper shell, the main flow pipeline is a main pipeline in a water supply system and is used for conveying water from a water source, the switching device is installed on the main flow pipeline and can control the communication state of at least one of the first branch pipeline and the second branch pipeline, and the rotating valve adjusts opening and closing. The first branch pipeline and the two pipelines are connected to the main pipeline in parallel and connected with the main pipeline respectively, and the first branch pipeline and the two pipelines can convey water to different areas or places with different purposes.

The invention discloses a gas raw material supply module and gas reaction equipment, and the gas raw material supply module is characterized in that a gas generator is connected with an inlet of a mass flow controller through a pressure regulating valve; a mass flow controller outlet is connected with a first one-way valve inlet; a first one-way valve outlet is used as a raw material supply module supply port; the outlet of the back pressure valve is connected with the inlet of the discharging module; the pressure regulating valve is matched with the back pressure valve, so that the pressure of gas entering the reaction module and the pressure of a product entering the discharging module reach specified pressure. By means of the structural design, switching feeding, switching reaction and switching discharging of different reactants are achieved. By matching with corresponding operation procedures, on the premise of saving cost, ensuring safety production and not increasing equipment volume, five hydrogenation reactions can be continuously carried out at most in single feeding, the reactions are automatically switched, and each group of reaction conditions are mutually independent. The device can continuously work for 7 * 24 hours, and the production efficiency is remarkably improved compared with existing equipment.

The utility model relates to the field of automatic uncovering of reaction tubes, and discloses an automatic uncovering device for PCR reaction tubes. According to the washing machine, a cover is fixedly connected to the lower portion of the pressing connecting pipe, a pressing column is installed in the cover, a strong spring is arranged on the periphery of the pressing column, a detergent storage bin is arranged below the cover, and a washing machine outflow opening is connected to the lower portion of the detergent storage bin; when the washing machine is used, the washing liquid flows into the washing liquid storage bin, after the outflow amount is appropriate, pressing is stopped, the washing liquid can stop flowing out, the outflow amount of the washing liquid can be conveniently controlled, the remaining washing liquid can be placed in the washing liquid storage bin and then flows into the transmission column through the washing machine outflow opening, the washing liquid can better flow into the sponge ball, and therefore the washing liquid can be better cleaned. The sponge ball can be more sufficiently and averagely adsorbed to the detergent, so that the interior of the reaction tube can be better and comprehensively cleaned, and the use convenience is improved.

The precise flow adjusting device comprises a shell (1) and a screw rod (4), an infusion tube (6) penetrates through the shell (1), an elastic piece (8) is arranged at the end, located in the shell (1), of the screw rod (4), the infusion tube (6) is clamped between the elastic piece (8) and the bottom face (2) of the shell (1), and the length of the portion, making contact with the infusion tube (6), of the elastic piece (8) is larger than the diameter of the screw rod (4). Pressure of the screw (4) is applied to the infusion tube (6) through the elastic piece (8), and compared with the mode that the pressure of the screw (4) is directly applied to the infusion tube (6) through the end of the screw (4), the length of the deformation part of the infusion tube (6) is greatly increased, the violent change of the cross section area of the stressed part of the infusion tube (6) is reduced, the change is smoother, and the infusion tube (6) is more stable. Therefore, adaptability to viscous liquid, environment temperature and vibration is improved, uncontrolled changes of liquid flow in the infusion tube (6) are reduced, and the purpose of precise flow adjustment is achieved.

The utility model discloses a grinding and canning device for musk T production, and relates to the technical field of canning devices, the grinding and canning device comprises a processing table, the lower end of the processing table is fixedly connected with a supporting frame, and a lifting table is arranged on the inner side of the processing table. According to the grinding and canning device for musk T production, a material can is conveyed to the lifting table, the lifting air cylinder pushes the lifting table to move upwards, the can opening and the butt joint are in butt joint, the can opening and the sealing gasket are attached, the sealing effect during filling is guaranteed, powdery materials are prevented from leaking into the working environment, meanwhile, during discharging, the sealing effect is good, and the working efficiency is improved. The driving motor is used for driving the transmission rod to rotate, the spiral blade rotates to push powder to be discharged from the discharging pipe, the discharging flow speed is conveniently controlled, a junction box is matched, the canning device is externally connected with a grounding device, static electricity accumulation is avoided, the transmission rod synchronously drives the scraper to rotate, the inner wall of the storage tank is cleaned, the powder is prevented from being adsorbed on the inner wall, and the service life of the storage tank is prolonged. Therefore, the practicability is improved.

The utility model discloses an aluminum alloy casting machine adopting a direct-current electromagnetic power mold filling system. The aluminum alloy casting machine comprises a vertical aluminum alloy casting machine, an aluminum alloy holding furnace and the direct-current electromagnetic power mold filling system, the direct-current electromagnetic power mold filling system is mounted on the aluminum alloy holding furnace; the vertical aluminum alloy casting machine is communicated with the aluminum alloy holding furnace through the direct-current electromagnetic power mold filling system; the direct-current electromagnetic power mold filling system comprises a direct-current electromagnetic power mold filling control system, an electrode, a ceramic tube and a riser tube; the ceramic tube is mounted at an outlet of a soup adding chamber of the heat preservation furnace, and the other end of the ceramic tube is communicated with the liquid rising tube; the liquid rising pipe can be located at the position aligned with a molten aluminum inlet in the mold. The direct-current electromagnetic power mold filling system is controlled by a direct-current electromagnetic power mold filling control system to start, the direct-current electromagnetic power mold filling control system is electrically connected with the electrodes, and the electrodes and the ceramic tube are fixed and sealed into a whole.

The utility model discloses a lead electrolysis quantitative casting device which comprises a heat preservation box connected with a backflow pipe and a conveying pipe, one end of the bottom of the heat preservation box is connected with a rotary working table, the other end of the heat preservation box is provided with a casting mechanism, and the casting mechanism comprises a casting opening formed in the bottom of the heat preservation box. A plunger air cylinder is installed at the top end of the heat preservation box, a piston rod is vertically inserted into the plunger air cylinder, the end of the piston rod is in butt joint with the sprue gate, a casting cup communicated with the sprue gate is installed at the bottom of the heat preservation box, a lead outlet pipe is movably connected to the casting cup, and the other end of the lead outlet pipe is connected with the heat preservation box through a lifting mechanism. A temperature sensor and a liquid level sensor are installed in the heat preservation box. According to the utility model, by arranging the sprue gate, the plunger cylinder, the casting cup and the lead outlet pipe, not only can heat loss be reduced, but also the quality of lead ingots can be improved, and by arranging the lifting mechanism, the height of the lead outlet pipe can be conveniently adjusted.

A main body of the degradable blood flow guiding device is a hollow tubular support formed by winding and weaving a plurality of strands of wires in a staggered mode, after the degradable blood flow guiding device is placed in a blood vessel tumor carrying section, blood flow can flow through a hollow inner cavity, part of blood flows into an aneurysm from a support grid, the inflow amount of the blood is limited due to the fact that the support covers the position of a tumor opening, and therefore the blood flow guiding device can be used for guiding blood flow. In particular, the impact of blood on aneurysm can be relieved, and the wire is made of zinc alloy and a small amount of nickel-titanium alloy; through the mode that zinc alloy and a small amount of nickel-titanium alloy are mixed, overall degradability is achieved, long-term medicine taking is not needed, and stimulation to the blood vessel wall due to long-term implantation is greatly reduced. In addition, a film layer is further arranged on the guide device and used for further optimizing flow direction control, and the treatment effect is improved.

A device for controlling liquid flow comprises a clamp body, a through hole is formed in the center of the clamp body, a groove is formed in the radial direction from the center of the through hole to the outer edge of the clamp body, the first end and the second end of the clamp body are formed on the two sides of the groove, and the clamp body is arranged in a spiral line mode from the second end to the first end. The flow adjusting mechanism comprises a buckle and a plurality of clamping grooves, the buckle is arranged at the first end, the clamping grooves are arranged inwards along the second end, and the buckle and the clamping grooves can be connected in a clamped mode. Due to the fact that the second end and the first end are arranged in a spiral line mode, when the first end and the second end are extruded, the axial distance between the first end and the second end is increased, the first end circumferentially moves relative to the second end, when the first end reaches the proper clamping groove position, force applied to the first end and the second end is released, the first end and the second end are reset, and the buckle is clamped into the corresponding clamping groove to be fixed. The infusion flow rate can be conveniently controlled by adjusting the position relation between the buckle and the clamping groove, and one-hand operation is facilitated.

The invention discloses a carbon dioxide molten salt electrolysis experimental device, comprising a carbon dioxide gas cylinder, a sealed electrolysis device and a gas collection device, wherein the sealed electrolysis device comprises a high temperature resistant stainless steel crucible, a graphite electrolytic cell, an anode, a cathode and a direct current power supply, wherein the high temperature resistant stainless steel crucible comprises a crucible body and a crucible cover, wherein the crucible cover is sealed and closed on the crucible body, wherein a graphite electrolytic cell is arranged in the crucible body, an air inlet joint and an air outlet joint are arranged on the crucible cover, wherein the outlet of the carbon dioxide gas cylinder is connected to the air inlet joint via a vent pipe, an extension pipe extending downwardly and connected to the air inlet joint is arranged at the bottom of the crucible cover, a direct current power supply is arranged above the crucible cover, an anode and a cathode are connected to the direct current power supply via a guide rod on the one hand, and are suspended through the crucible cover and extended into the molten salt electrolyte via a guide rod seal on the other hand, a gas collecting hood for covering the anode is arranged in the crucible body, and an exhaust pipe is arranged on the top of the gas collecting hood. The invention has the advantages of simple structure, easy assembly, good air tightness, and can effectively collect high purity oxygen.

This application discloses a flow control method, apparatus, storage medium, and electronic device, relating to the field of smart home technology. The flow control method includes: obtaining N parameter values ​​from a set of parameter values, wherein the set of parameter values ​​includes at least two of the following: the number of queries processed by the business unit per time unit, the response time of the business unit, the CPU utilization rate of the target device running the business unit, the memory usage of the business unit, and the time node at which the target device runs the business unit; N is an integer greater than or equal to 2; and performing flow control on the business unit based on the N parameter values. This solution addresses the problem that flow control frameworks cannot effectively control the flow of business units, thus enabling better flow control of business units.

The application discloses a microfluidic device and a method for introducing microparticles into cells. The method comprises injecting a microparticle solution and a cell suspension into an inlet channel, and the microparticle solution and the cell suspension are mixed and flow into a main channel. When flowing through the main channel, gas in a microstructure and mixed liquid in the main channel form a gas-liquid interface at a first gap. A piezoelectric transducer is controlled to be turned on, and the piezoelectric transducer generates sound waves. The sound waves make the gas-liquid interface vibrate and generate acoustic vortices near the gas-liquid interface. The acoustic vortices drive the cells and the microparticles in the mixed liquid to gather and rotate. The cells reversibly deform under stress to generate micropores on the cell membrane. The microparticles enter the cells through the micropores on the cell membrane, and the process of loading the cells with the microparticles is completed. The device and the method disclosed by the application realize higher microparticle loading efficiency and solve the problem of uneven microparticle loading effect while protecting the integrity and functionality of the cells.

The pouring system for continuous rheological extrusion of liquid nonferrous metals includes a melting furnace, a holding furnace, a flow channel docking device, a flow channel device, a continuous rheological extruder, a cooling device, a guide frame and a storage device. The melting furnace and the holding furnace are electromagnetic induction furnaces. The bottom of the crucible is provided with a bottom channel, and the bottom channel is opened and closed by a plunger valve. The bottom channel of the crucible is connected to the flow channel device with a heat preservation function through a flow channel docking device. The melting furnace and the holding furnace, as well as the holding furnace and the continuous rheological extruder, are connected through the flow channel device. The cooling device, the guide frame and the storage device are sequentially arranged after the continuous rheological extruder. The beneficial effect is that the problems of unstable pouring temperature and pouring speed in the continuous rheological extrusion production process are solved, and it has the advantages of being able to refine grains, reduce casting defects, shorten the process, and be energy-efficient; strong adaptability, unlimited product length, good quality; small investment, and low production cost.

The constant-speed drug delivery assembly comprises a drug loading part, a drug dripping part and a pressure stabilizing part which are communicated, the drug loading part is arranged above the drug dripping part and communicated with the drug dripping part, the lower portion of the pressure stabilizing part is installed outside the drug dripping part, and the upper end of the pressure stabilizing part is communicated with the upper portion of the drug loading part; and the lower end parts of the medicine dripping part and the pressure stabilizing part are open. According to the technical scheme, the medicine containing part is used for containing the medicine liquid, the medicine dripping part is used for dripping the medicine liquid, and the ends, back on to the pressure stabilizing part, of the medicine dripping part and the pressure stabilizing part are open, namely, the ends of the medicine dripping part and the pressure stabilizing part are communicated and equal in air pressure, and due to the fact that the other end of the pressure stabilizing part is connected with the upper portion of the medicine containing part, the air pressure at the two ends of the pressure stabilizing part is equal. The air pressure of the medicine dripping end of the medicine dripping part is equal to that of the upper end of the medicine loading part, so that the medicine liquid in the medicine loading part can uniformly drip according to the size of a pipeline at the communicating position of the medicine loading part and the medicine dripping part; in conclusion, the medicine dripping device is simple in structure, and the technical effect of evenly dripping medicine is achieved.

The present invention discloses an underground waterproof system and a construction method thereof, comprising a drainage mechanism, a water storage mechanism and a waterproof mechanism placed under a basement, wherein the drainage mechanism is placed directly above the water storage mechanism and is interconnected with the water storage mechanism; the drainage mechanism comprises a drainage channel and a drainage switch placed on the drainage channel; the water storage mechanism comprises a water reservoir and an overflow channel placed above the water reservoir and connecting the water reservoir and the drainage channel; the waterproof mechanism is placed directly below the water reservoir; the water reservoir is an inverted cone structure; the overflow channel is placed at the top of the water reservoir, and an overflow switch is provided in the overflow channel; the waterproof mechanism is connected with the water reservoir; the drainage channel and the overflow channel are connected by a three-way pipe; the drainage channel is placed on both sides of the overflow channel and is inclined downward relative to the overflow. The present invention has a simple structure, is easy to control the drainage flow and flow rate, has a good drainage effect, and has a high overall strength. It not only improves the waterproof performance but also can ensure the safe use of the first floor of the building. It is highly practical and easy to promote.

The invention relates to the technical field of ultrafiltration membranes, in particular to a bundle tube type external pressure ultrafiltration assembly which comprises a plurality of bundle hollow tubes arranged side by side and further comprises membrane wire integrated bundles, a liquid collecting assembly and a flow dividing assembly, one membrane wire integrated bundle vertically penetrates through each bundle hollow tube, and the liquid collecting assembly and the flow dividing assembly are arranged side by side. The lower end of the bundling hollow pipe extends into the stock solution shunting cavity and is fixedly connected with the shunting assembly; sewage is shunted into the plurality of bundled hollow pipes through the shunting assembly, the sewage is filtered through the membrane wire integrated bundles in each bundled hollow pipe, and the hydraulic conditions of the membrane wire integrated bundles are relatively consistent under the guide action of the bundled hollow pipes, so that the membrane wire integrated bundles are uniform in water permeation, and the surfaces of the membrane wire integrated bundles are not easy to harden and hang mud; the problems of silting and blocking are not easy to occur, the anti-pollution performance of the assembly can be effectively improved, and the problem that silting and blocking are easy to occur among membrane wires in the operation process of the existing external pressure type ultrafiltration membrane is solved.

The utility model relates to the technical field of concrete processing, and discloses a high-efficiency stirring mechanism with a spraying function, the high-efficiency stirring mechanism comprises a stirring barrel and a controller fixedly mounted on the front surface of the stirring barrel, and the outer part of the stirring barrel is provided with a spraying mechanism extending into the stirring barrel; the spraying mechanism comprises a water tank fixedly mounted outside the stirring barrel, a booster pump fixedly mounted at the top of the water tank, a spray head arranged at the top of the stirring barrel and a telescopic device which is arranged outside the stirring barrel and is used for performing lifting adjustment on the spray head. According to the efficient stirring mechanism with the spraying function, a controller starts a downward pressing air cylinder to stretch out and draw back to drive a mounting plate and a mounting pipe to move up and down to extend into the stirring barrel, and the situation that dust and residual water on a spray head are combined, so that caking is generated, and consequently the spray head is blocked is avoided; and a booster pump works to convey water into a mounting pipe through a conveying pipe and a hose, so that dust is conveniently sprayed, the dust removal effect of the spraying mechanism is improved, and the advantage of good spraying effect is achieved.

An efficient continuous hydrolysis tower comprises a tower body arranged outside, a feeding pipe arranged at the bottom of one side of the tower body, a backflow pipe arranged at the top of one side of the tower body, a first spraying disc and a second spraying disc which are installed inside the tower body, a water conveying pipe, a control assembly and a circulation assembly. Water conveying pipes connected with an external water pump are arranged at the bottoms of the first spraying disc and the second spraying disc, a control assembly is arranged at the top of the tower body, and a circulating assembly is arranged at the bottom of the inner side of the tower body; the control assembly comprises a mounting plate, a disc, an inner disc and a round hole, the mounting plate is fixed at the top end of the tower body, a driving motor is mounted on one side of the mounting plate, a driving gear is mounted at the top end of the driving motor, a rotating shaft is mounted in the middle of the tower body through a bearing, and a driven gear is mounted at the top end of the rotating shaft. The material hydrolysis efficiency is high, the hydrolysis degree is improved, the hydrolysis uniformity is good, meanwhile, the gas flow rate can be controlled, and use is facilitated.

A machine (1) for emulsifying a food product. The machine conveys a food product from an upstream section past an emulsifier stack to a downstream section by a pressure difference between a pressure in the upstream section and a pressure in the downstream section. To allow improved control of the emulsifying process and potentially allow better flow control of the emulsified food product, the machine further comprises a pressure regulating structure configured to control the pressure difference between the pressure in the upstream section and the pressure in the downstream section.

This utility model discloses a liquid dispensing device for a medical nebulizer, comprising: a connecting sleeve for detachably connecting to the dispensing nozzle of the medical nebulizer; a flexible tube with one end fixedly connected to the connecting sleeve, and the other end for detachably connecting to a medicine bag or medicine bottle; a dispensing connector on the flexible tube for dispensing medication into the flexible tube; an exhaust valve on the flexible tube for venting gas from the medication solution within the flexible tube; a regulator on the flexible tube for initially adjusting the flow rate of the medication solution within the flexible tube; and a regulating valve on the flexible tube for precisely adjusting the flow rate of the medication solution within the flexible tube. This liquid dispensing device has a simple structure, is easy to use, can be quickly connected to the dispensing port of a medical nebulizer, can continuously nebulize, and will not experience interruptions in nebulization or leakage during medication dispensing. The medication flow rate is controllable, reducing the workload of nurses.

The utility model relates to the technical field, in particular to an automobile stamping die with a cold treatment assembly, which comprises an upper die, a lower die, a lower die and a cold treatment assembly. The lower die is arranged under the upper die; wherein a wear-resistant coating is arranged on the contact surface of the upper die and the lower die; a cooling assembly is arranged at the bottom of the lower die; the cooling hose is attached to the bottom face of the lower die, the cooling effect of a simple structure is achieved, the production and use cost is greatly reduced, the cooling hose is arranged on the bottom face of the lower die in a twisted mode, the double-flow-direction effect in a pipeline is achieved through the flow stopping part, the flow direction of the bottom of the lower die is continuously switched, the cooling uniformity is enhanced, and the cooling effect is improved. The flow blocking part is arranged to be the sawtooth-shaped soft sheet, so that the flow speed in the pipeline is controllable, and the number of torsion turns can be adjusted according to the opening and closing frequency of the mold so as to adapt to the cooling effect of the mold.

This invention belongs to the field of solder paste technology and discloses a formulation and preparation method of low-melting-point SMT solder paste, comprising solder alloy powder, a mixed substrate, and flux, wherein the ratio of each component of the solder alloy powder, mixed substrate, and flux is 60:30:10. This invention avoids reducing the mechanical strength of the solder joints, ensures the completion of low-melting-point soldering, and improves the wettability of the solder paste. Simultaneously, by utilizing type A and type B viscosity modifiers to control the viscosity of the mixed substrate and flux respectively, it ensures viscosity quality control during comprehensive mixing. This allows the solder paste to adapt to different process requirements in different application scenarios, improves solder adhesion performance, and provides better flow control, enabling the solder to better adhere to the pad apertures or solder joints during vertical printing or wave soldering. Overall, it improves the soldering performance of low-melting-point SMT solder paste, resulting in good soldering effect and long lifespan.