230results about How to "Warm up evenly" patented technology

The invention provides a preheating method and device suitable for powder laying type additive manufacturing, and belongs to the technical field of additive manufacturing. A movable type plane heating plate capable of covering a whole powder bed is arranged over the powder bed, the mounting height of the plane heating plate is slightly larger than a powder laying device, in the powder laying process, the powder bed and parts are preheated, after powder laying is finished, a plane light source is closed and put away, and the phenomenon that in the machining process, the plane heating plate blocks a high-energy beam is avoided. In the heating process, a temperature measuring sensor is used for monitoring the temperature of the powder bed in real time, a control system is adopted to implement feedback control over preheating of the powder bed according to the temperature monitoring result, full-breadth covering type heating is adopted, and the powder bed and formed parts are subject to high-temperature, efficient and unifier preheating. The invention further provides the device achieving the above method. The method is wide in application material and high in expansibility and is particularly suitable for powder laying type additive manufacturing of multiple large-breadth high-energy beams.

The invention discloses a plate warm electro-hydraulic high-speed impact-quasi static hydraulic composite forming device and a plate forming method achieved by adopting the device and relates to the field of metal material processing forming to solve the problems that forming of plates and complex parts is difficult, film attaching is poor, and deformation is not even. A vacuum pump is used for pumping out gas in a female die cavity; a fluid injection device is adopted for injecting high-temperature-resisting liquid to a liquid chamber; a heating device is used for heating the female die cavity, the high-temperature-resisting liquid in the liquid chamber is heated, preheating on a to-be-processed plate is completed, and heat preservation is conducted on the to-be-processed plate; an electromagnetic forming system is used for conducting discharging forming on the to-be-processed plate; high-pressure warm liquid is slowly injected into the liquid chamber under the quasi static condition, and quasi static hydraulic forming is conducted on the to-be-processed plate; and the high-pressure warm liquid in the liquid chamber is cooled to the room temperature within a period of time, waste liquid is recycled, an electro-hydraulic forming die is opened, and the to-be-processed plate is taken away. The device and the method are used for forming plates.

The invention discloses a preheating device for a chemical vapor deposition furnace. Air flow plates which are arranged in parallel so as to increase air processes and prolong heating time, and beams are arranged simultaneously so as to improve heat radiation capacity; therefore, the aims of fully and uniformly preheating organic air can be fulfilled. An outlet is provided with disturbance holes which are positioned on the same circumference; and a certain included angle is formed between the axial direction of the disturbance holes and a horizontal plane; after preheated air enters the disturbance holes, the preheated air is forced to be sprayed along the axial direction of the disturbance holes to form strong rotation air flow under the collision action of disturbance walls, and organic air which is decomposed in advance forms macromolecules under the actions of centrifugal force and polymerization along with the rising of the rotation air flow; and the macromolecules preferentially enter the bottom of a stock column under the double actions of inertia force and centrifugal force, so axial back mixing probability is reduced, the macromolecules are diffused and deposited in a prefabrication body to achieve the effect of densifying the bottom, the air which is not decomposed rises continuously to ensure that top pressure and air pressure are reduced, and finally the aims of densifying the whole carbon disc stock column can be fulfilled.

A heat pressing method for polyethylene plant fiber composite material relates to a method for manufacturing plant fiber material. The invention solves the problems that only fibril can be applied, plant format is narrower, straw is liable to thermolysis and charring and the mechanical properties of plant manufactured by pre-heat pressing are poor in the production of WPC in the manner of extraction. The method of the invention has the steps that: PE plastic fiber is mixed with crushed plant aggregates to obtain mixture that is paved into a plate base; the plate base is pre heated under a pressure of 1 to 3 MPa and at a temperature of 170 to 190 CEG D; the plate base is kept under a pressure of 4 to 6 MPa for 8 to 15mins; and at last, the plate base is cooled to 70 to 80 CEG D under a pressure of 3 to 6 MPa; and after pressure relief, the plank is obtained. The flexural strength of the plank manufactured in the method of the invention is 20 MPa. The invention adopts the polyethylene in fiber configuration and the crushed aggregates of the plant and the fiber is evenly mixed and has high productivity. In addition, the crushed aggregates of the plant and the fiber can be prevented from being deteriorated and darkened due to high temperature.

The invention discloses a winding preheating and start-up method of a permanent magnetic synchronous motor. The motor comprises a stator three-phase winding, a rotor and a frequency converter. The winding preheating method comprises the following steps of: (1) maintaining the F direction of the resultant magnetic field of the stator three-phase winding unchanged by the frequency converter, and outputting torque by the frequency converter to draw the rotor to rotate so as to make the magnetic field direction of the rotor parallel to the F direction of the resultant magnetic field of the statorthree-phase winding, so that the rotor is positioned; and (2) after the rotor is positioned, outputting current by the frequency converter to preheat the stator three-phase winding. According to the permanent magnetic synchronous motor winding preheating method disclosed by the invention, on the premise of not increasing an external auxiliary preheating device, the positioned preheating of the motor winding at a low-temperature environment is realized, so that the motor is ensured to be started-up at appropriate winding temperature, the probability of start-up failure of the motor is reduced,overshoot current at the time of start-up is eliminated, the motor is well protected, the reliability of the motor is improved and the service life of the motor is prolonged.

The invention relates to a working temperature control device for a high-power power electronic device, consisting of a circulated water cooling device. A heater is arranged in the circulation loop, a2-position 3-way electromagnetic valve controls the switching between the heater and the radiator, a temperature sensor of the controller is arranged at a water outlet of the water cooling plate of the power electronic device, and the output end of the controller is connected with the 2-position 3-way electromagnetic valve. The working temperature control device has the advantages of high heat transfer efficiency, even pre-heating, short pre-heating time, high efficiency and reduced energy consumption.

The invention discloses a multicolor vertical injection molding machine for a center rotating tower and an injection molding method. The injection molding machine comprises a rack, a lower die plate,an upper die plate, a die locking plate, guide pillars, the center rotating tower, a material injection device and a center rotating tower stripping device. The center rotating tower is internally provided with positioning grooves used for positioning insert seats so that the insert seats can be installed conveniently. A hopper basket in the material injection device is provided with heating plates which are intersected longitudinally and transversely so that materials can be evenly heated. The material injection effect can be better by controlling the temperature of a material cylinder. The material cylinder is provided with a material nozzle. A needle valve and pneumatic control are adopted so that material control can be more reliable. Reliable stripping of finished products can be achieved through the stripping device. By means of the injection molding method, die locking is adopted for achieving die opening and die assembling; the center rotating tower is used for achieving multicolor material injection forming; and the center rotating tower stripping device is used for achieving stripping.

The invention discloses a steam sterilizing device of rare precious medicinal materials such as cordyceps, comprising a sterilizing bin and a cooling bin which are respectively provided with a sterilizing bin feeding opening, a sterilizing bin discharge opening, a cooling bin feeding opening and a cooling bin discharge opening; the cooling bin feeding opening is connected with the sterilizing bin discharge opening; a gas exhaust opening is arranged at the upper part of the sterilizing bin; a hot blast air inlet is arranged at the lower part of the sterilizing bin; high-temperature or overheat sterilizing steam enters the sterilizing bin through a pulse control valve via the hot blast air inlet; and the cooling bin is provided with the cooling bin air inlet and the cooling bin air outlet. The invention solves the problems that the steam sterilizing device in the prior art uniformly and thoroughly sterilizes by rotating a stirrer during sterilization but influences the medicinal value of a material to be sterilized caused by being damaged and provides a steam sterilizing device of the rare precious medicinal material, which can effectively ensure that the material is not damaged and the medicinal value of the material cannot be reduced.

The invention provides a 3D printing head with follow-up pressurization and heating. The strength of a printing piece can be simply and effectively improved. A printing head body, an axial driving mechanism and a heating unit of the 3D printing head with follow-up pressurization and heating are separately relatively fixed to a Z-axis linear module. A pressurization plate is positioned under the printing head body and is fixedly connected with the output end of the axial driving mechanism, and can vertically reciprocate under the action of the axial driving mechanism. A central coaxial throughhole is formed in the position, corresponding to the printing head body, of the pressurization plate to avoid interference with the printing head body. The heating unit surrounds the bottom of the printing head body and keeps a distance from the pressurization plate. According to the 3D printing head with follow-up pressurization and heating, a vibration (pressurization) and heating mechanism which follows the printing head to move overall is designed at the position of the printing head, the synchronized heating mechanism can preheat a printed layer, and the mutual combination of adjacent interlayer materials is promoted; and on the basis, the pressurizing plate flattens and compacts the printed layer, so that the interlayer combination strength is further improved.

The invention discloses an automatic brazing device of connection between copper and stainless steel. The automatic brazing device of the connection between the copper and the stainless steel comprises an operating platform and is characterized by further comprising a high-frequency induction welding machine, a sealing box and a brazing clamp. The high-frequency induction welding machine and the sealing box are arranged on the operating platform, argon is aerated into the sealing box, the brazing clamp is arranged in the sealing box, and a welding joint of the high-frequency induction welding machine stretches to a welding post on the brazing clamp inside the sealing box. The problems that in the prior art, when the copper and the stainless steel are welded, the stainless steel is relatively fast in temperature rising and the copper is relatively slow in temperature rising due to the fact that temperature sensing coefficients have a big difference, therefore, in the process of welding, the copper and the stainless steel are heated for same time, but the reached temperature is different so that the welding effect is relatively poor, and the product quality is influenced are solved. The automatic brazing device of the copper and the stainless steel is simple in structure, convenient to use and has relatively good welding quality.

The invention discloses a furnace body structure of an energy-saving type preheating furnace. The furnace body structure comprises a preheating furnace body. A plurality of preheating cavities are formed in the preheating furnace body, and the side walls of each preheating cavity are provided with air inlets. An air return opening is formed in the rear wall of the preheating furnace body. The air inlets are provided with wind shields, and the wind shields can move left and right in guide grooves of the upper inner walls and the lower inner walls of the air inlets. Each preheating cavity is provided with a drawer-type storage box, and each storage box body is further internally provided with a roller. Through holes are evenly distributed in the side walls of the rollers. The two ends of each roller are connected with rotating shafts. One ends of the rotating shafts are connected with inner side bearing pedestals, and each inner side bearing pedestal is coated with a thermal insulation layer. The other ends of the rotating shafts penetrate through drawer panels and are connected with outer bearing pedestals and motors arranged outside the drawer panels. The front face of each drawer panel is provided with a mounting box body. Each mounting box body is further internally provided with a fan. Each drawer panel is made of a thermal insulation material. The furnace body structure is uniform in preheating and long in service life.

The invention discloses a laser welding longitudinal seam joint guiding, preheating and distressing dynamic correction device and method for a thin-walled cylinder, and belongs to the technical fieldof laser welding. The device comprises a supporting mechanism, a longitudinal joint centering and guiding mechanism, double-side self-preheating feeding mechanisms, destressing correction mechanisms and a size detection structure. A blade-shaped guiding body of the device is embedded into the open cylinder, a longitudinal connector is automatically centered and guided, the guiding body is gradually separated from the connector along with opposite movement and enclasping of heating and enclasping wheels on the two sides, centering and guiding of the longitudinal connector are completed, weldingdefects are effectively avoided, the welding quality is improved, and the equipment configuration and investment cost is reduced. Uniform preheating and longitudinal feeding of the cylinder are completed through self-rotation of the heating and enclasping wheels on the two sides; the cylinder is subjected to rolling correction through circumferential high-temperature correction wheels, and meanwhile, the welding residual stress is eliminated; and laser sensors are used for detecting the size of the cylinder in real time, a circumferential shape correcting die is synchronously adjusted, and the problem of welding deformation of the thin-walled cylinder is solved.

The invention discloses a preheating device and method for a heavy oil reservoir. The preheating device includes an upper horizontal injection well and a lower horizontal production well which are arranged on a target position of a heavy oil reservoir to be preheated; an injection pipe of the upper horizontal injection well which is arranged in a vertical section of the upper horizontal injection well and is used for injecting a nanofluid into a horizontal section of the upper horizontal injection well; an electrical heating column of the upper horizontal injection well which is arranged in a horizontal section of the upper horizontal injection well and is used for electrically heating the injected nanofluid; an injection pipe of a lower horizontal production well which is arranged in a vertical section of the lower horizontal production well and is used for injecting a nanofluid into a horizontal section of the lower horizontal production well; an electrical heating column of a lower horizontal production well which is arranged in the horizontal section of the lower horizontal production well and is used for electrically heating the injected nanofluid. The technical scheme can improve the preheating efficiency and evenness of the heavy oil reservoir, can improve the use degree of the horizontal section, can reduce the operation cost and complexity of preheating, and can enlarge the application range of preheating.

The invention discloses a green devulcanizing and reclaiming apparatus with supercritical CO2 and microwave assisted multi-segment twin-screw extrusion, comprising a horizontal barrel; a twin-screw is rotationally mounted in the barrel; the barrel is provided with a feed port at the left upper end of the twin-screw, and the upper end of the barrel is fitted ith a microwave heating device; the middle of the barrel is provided with a gas injection end for supplying supercritical CO2; the rear end of the barrel is provided with a cooling extruder, the tail end of the cooling extruder is fitted with a dicing device, and a discharge port of the dicing device is provided with a product packaging device. The apparatus of the invention has simple structure, uses small floor area, is full-automatically controllable, low in production process energy consumption and green, and the defect that traditional reclaimed rubber production process has high contamination, high energy consumption, intermittence, high labor intensity and unstable product properties is effectively solved.

The invention relates to an anti-counterfeiting label outer surface laminating machine. The laminating machine comprises a base, wherein the left end of the base is provided with a power mechanism, the top surface of the base is provided with an upper pressing roller and a lower pressing roller through a driving shaft, a gap is left between the upper pressing roller and the lower pressing roller to ensure the passage of an anti-counterfeiting label and a membrane, the driving shaft is connected with the power mechanism by a coupling, a driven shaft is arranged above the base by a left side plate and a right side plate, the driven shaft is connected with the power mechanism, a membrane roll is arranged on the periphery of the driven shaft, and the top surface of the base is provided with apre-heating mechanism through two mounting mechanisms. According to the provided anti-counterfeiting label outer surface laminating machine, a gap is left between pre-heating rollers and the membraneroll, the membrane roll temperature is reduced, the inner structure of the membrane is protected, the service life of the membrane is prolonged, the membrane roll is uniformly pre-heated, the pre-heating effect is good, the laminating quality is improved, the membrane is prevented from falling off, the pre-heating hot air flow impact force is small, and the risk of breaking the membrane is reduced.

The invention provides a specific structure of a feed pipe spiral preheating device for molecular distillation equipment. According to the technical scheme, through the structural setting of an internal isolation frame and an external protection pipe, and optimized improvement of the internal isolation frame structure, the route of a heat-conducting medium flowing through the spiral preheating device is optimized, so that the heat-conducting medium can flow through the outer side wall of the feed pipe regularly, and uniform preheating of the whole outer side wall of the feed pipe can be ensured.