113 results about "Melting heat" patented technology

The invention relates to a method and a system for manufacturing a nano modified polyethylene electronic wire in the field of intelligent manufacturing equipment industry. The method comprises the following steps of: extracting temperature fluctuation characteristics from temperature distribution in a plasticizing process, dynamically adjusting parameters of a cooling system by adopting a fuzzy control algorithm aiming at the fluctuation characteristics, and determining temperature consistency in a forming stage; temperature consistency data in the forming stage are obtained, a preset wire diameter tolerance threshold value is combined, if the temperature consistency is lower than the threshold value, the extrusion speed is adjusted through a servo motor, and the optimized wire diameter precision is obtained; melt rheological parameters are extracted from the wire diameter precision data, melt heat conduction uniformity is calculated by adopting a heat conduction model of a nano-modified polyethylene material, and the formation strength of an interface permeation network is determined; and rheological property data are obtained, a real-time cooperative control algorithm is adopted, coupling parameters of melt pressure and temperature are dynamically adjusted, and optimized extrusion molding process parameters are obtained.

The invention discloses a preparation method of a high-modulus Mg-Al-RE alloy with an Al2RE phase uniformly distributed, which comprises the following steps: 1) melting other magnesium alloy components except a high-purity aluminum component into a magnesium liquid state to obtain a molten magnesium liquid; (2) adding high-purity aluminum to the surface of the molten magnesium liquid in the step (1), pressing, stirring and melting to obtain a molten magnesium alloy; and (3) the molten magnesium alloy is rapidly cooled. The aluminum particles are added after the other magnesium alloy raw materials are melted, so that high-modulus Al-RE phase sedimentation of the magnesium alloy raw materials in the melting process is effectively avoided; besides, after the aluminum particles are put, the aluminum particles are slowly pressed down, the melt state is observed all the time, after the whole melt enters the white bright state, the melt is slightly stirred, then a stirring rod is pulled away, rapid water cooling is conducted, the melt heat preservation time is greatly shortened, and therefore sedimentation of a high-modulus Al-RE phase is reduced; and finally, the high-modulus Mg-Al-RE alloy with the high-modulus Al-RE phase uniformly distributed in the gravity direction is obtained.

In a method of using ultrasonic welding for fusion bonding of thermoplastic composites, an energy director is formed in place on a first thermoplastic substrate. The energy director can be protrusions arranged in a grid pattern over the entire weld region. The energy director can have protrusions of varying thicknesses to account for unevenness along the weld interface. Forming the energy director can be carried out by placing thermoplastic film on the first thermoplastic substrate, melting the thermoplastic film, and stamping the thermoplastic film with an energy director stamp. After the energy director is formed, the first thermoplastic substrate is ultrasonically welded to a second thermoplastic substrate with the energy director sandwiched between the first and second thermoplastic substrates.

The embodiment of the invention relates to an overhead line system deicing method and device, equipment and a medium. The method comprises the steps that icing information of a target overhead line system is acquired; wherein the icing information comprises an icing position and an icing thickness; determining ice melting heat corresponding to an ice layer on the target contact net based on the icing thickness, a preset light spot radius and a preset heating temperature, and determining target power based on the ice melting heat; generating a reagent spraying instruction according to the icing position, and sending the reagent spraying instruction to a reagent spraying unit, so that the reagent spraying unit sprays a laser absorption reagent to the icing position; and generating a laser emission instruction according to the target power and the icing position, and sending the laser emission instruction to a laser emission unit, so that the laser emission unit emits deicing laser to the ice layer sprayed with the laser absorption reagent in the icing position at the target power. Therefore, the power of the deicing laser is proper, the laser can be well absorbed by the ice layer, and the deicing efficiency is improved while the damage of the laser to the contact network is reduced.

A polypropylene microsphere and a preparation method therefor, a 3D printing raw material, and a use are provided. The polypropylene microsphere contains 0.2 wt %-10 wt % of a structural unit derived from ethylene and 90 wt %-99.8 wt % of a structural unit derived from propylene. A melting heat absorption curve of the polypropylene microsphere is obtained by means of a differential scanning calorimeter (DSC), and a half-peak width (Wm) of the melting heat absorption curve of the polypropylene microsphere is 4-10° C. The crystallization sequence distribution of the polypropylene microsphere is uniform, and when the polypropylene microsphere is used for 3D printing, 3D printing melting is uniform.

The application belongs to the technical field of metal-organic framework material and gas separation membrane preparation, and particularly relates to a preparation method of a halogen-modified high-porosity self-supporting MOF glass membrane, which comprises the following steps: firstly, a high-porosity vitrifiable MOF material with imidazole as a first ligand and a series of halogen benzimidazoles as second ligands is synthesized by a low-temperature solvothermal method; then, halogen MOF powder with high-temperature melting characteristics is pressed into a dense and crack-free disc-shaped precursor by a mechanical cold-pressing method; and finally, the disc-shaped precursor is subjected to high-temperature melting heat treatment under an inert atmosphere, and the heating temperature can ensure that the MOF particles are fully melted and flow, so that the interstitial gaps, defects and grain boundaries among the original particles in the thin sheet are completely eliminated. The application aims to prepare a defect-free, high-selectivity and high-flux MOF glass membrane, and solves the problems of low porosity and limited gas separation performance of the existing MOF glass membrane.

The application discloses a high-efficiency energy-saving door and window glass structure based on graphene heat conduction regulation and a manufacturing method, relates to the field of door and window glasses, and comprises an outer frame plate, an inner frame plate and a controller, the inner frame plate is fixedly connected to the inner wall of the outer frame plate, and the controller is embeddedly installed on the side wall of the outer frame plate, characterized in that the inner frame plate comprises a fixed frame two, outer layer glass, middle layer glass and inner layer glass, and the outer layer glass, the middle layer glass and the inner layer glass are all fixedly connected to the inner wall of the fixed frame two. The graphene nanobelt directional heat conduction film is arranged along the glass normal direction by the magnetic field induced electrophoretic deposition technology, an efficient heat conduction path perpendicular to the glass surface is constructed, cold energy can be quickly conducted out in winter, and heat flow is blocked in summer; indoor heat preservation is enhanced in winter through the graphene film directional heat conduction; in summer, the phase change material is combined with melting heat absorption, indoor heat gain is reduced by more than 30%, and high-efficiency energy saving is realized.

The present invention discloses a chromite wollastonite glass-ceramics and a preparation method thereof, belonging to the technical field of glass-ceramics. The present invention uses furnace slag, cullet and batch as raw materials, and prepares glass-ceramics by a one-step melting heat treatment process. The prepared chromite wollastonite [Ca(FeCr2O4)SiO3] glass-ceramics has excellent properties, and its performance indicators are superior to those of similar glasses. It has high mechanical strength, high hardness, good wear resistance, good chemical corrosion resistance, small thermal expansion coefficient and pays attention to environmental protection. It can adapt to harsh use environments and has good application prospects.

1. The name of the product of this design: Hot Melt Glue Machine (10L). 2. Purpose of the product of this design: used to melt hot melt adhesive and spray adhesive through a hose glue gun. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

To provide a laminated film having improved barrier properties.SOLUTION: There is provided a laminated film comprising a base material layer containing a polyethylene-based polymer and a barrier resin layer, wherein the heat of fusion (ΔH2nd) of the base material layer calculated by the following method is 158.0 J / g or more. (Method) When performing a first differential scanning calorimetry measurement (1st Run) comprising a step of raising a temperature from -50°C to 200°C at a temperature rising rate of 10°C / min, an isothermal step of keeping a temperature at 200°C for 5 minutes, a step of lowering a temperature from 200°C to -50°C at a temperature lowering rate of 10°C / min and a second differential scanning calorimetry measurement (2nd Run) comprising a step of keeping a temperature at -50°C for 5 minutes and a step of raising a temperature from -50°C to 200°C at a temperature rising rate of 10°C / min, in the DSC curve 2 obtained from the second differential scanning calorimetry measurement, the heat of fusion (ΔH2nd) is calculated from the endothermic peak observed in the range of 20°C or more and 160°C or less.SELECTED DRAWING: Figure 1

The invention discloses a method for improving metallurgical quality of a nickel-based high-temperature alloy large thin-wall complex-structure casting, which comprises the following steps of: preparing a wax mould of the nickel-based high-temperature alloy large thin-wall complex-structure casting by adopting an additive manufacturing technology, and bonding the wax mould with a pouring gate to form a wax mould module; preparing a ceramic shell of the wax mold module; according to the designed alloy components and process, metal elementary substances are put into corresponding areas in a three-chamber vacuum induction melting heating furnace to be smelted, and nickel-based high-temperature alloy melt is obtained; according to the designed partition preheating control mode of the ceramic shell, the ceramic shell is put into a corresponding area in a three-chamber vacuum induction melting heating furnace to be preheated in a partition mode; and the nickel-based high-temperature alloy melt is poured into the ceramic shell, after pouring is completed, the ceramic shell is pulled downwards according to the designed variable-speed pulling technology, and the nickel-based high-temperature alloy large thin-wall complex-structure casting is obtained. According to the method, a plurality of design details are integrated, and the prepared casting has excellent metallurgical quality.

The invention relates to the technical field of steel production, and discloses a method for regulating and controlling residual stress of additive high-strength steel through cooperation of thermal cycle and martensite phase transformation, and the method comprises the following steps: S1, collecting process information; s2, establishing a digital twinborn model according to the process information and predicting a residual stress field; s3, cooperative control parameters are generated through a control algorithm; s4, the heat source output device is controlled to melt the raw materials to form a new layer of geometric structure; and S5, on the basis of the cooperative control parameters, residual stress generated by thermal shrinkage is compensated or counteracted through the volume expansion effect of martensite phase transformation. According to the method, the residual stress is predicted through the digital twinborn model, the control parameters are generated to control non-melting thermal cycle to trigger martensite phase transformation at a precise time-space point, thermal shrinkage stress is compensated through phase transformation volume expansion, and therefore the precision and predictability of stress regulation and control are improved.

To provide a frozen cell thawing device that can avoid the effects of cryoprotectants as much as possible when thawing frozen cells.SOLUTION: Provided is a frozen cell thawing device 11 including: an introduction pipe 25 for guiding a liquid medium 26; a melting unit 15 for holding a container 13 for introducing the medium 26 from the introduction pipe 25 while accommodating frozen cells 12 containing a freezing treatment liquid including a cryoprotectant, and applying melting heat to the frozen cells 12 from the medium in contact with the frozen cells 12; a liquid flow unit 34 for generating relative movement of the medium with respect to the frozen cells 12; and a discharge pipe 32 connected to the container 13 for guiding the discharge of the medium containing the thawed cells. When the thawed cells are dispersed in the medium, the concentration of the cryoprotectant in the medium is maintained at 3 vol.% or less, preferably 1 vol.% or less.SELECTED DRAWING: Figure 1

A tag gas capsule utilizes a thermally based release system to allow the tag gas to flow through a fuel pin and to be detectable upon a leak in the fuel pin. A tag gas capsule is fabricated that has an escape pathway for the tag gas wherein the escape pathway is sealed by a thermally sensitive material. During fabrication, the thermally sensitive material is melted into the tag gas capsule and seals a flow hole in the tag gas capsule. The capsule is then filled with a tag gas and sealed to prevent escape of the tag gas. Once the capsule has been installed into a fuel pin, the capsule can be heated to melt the thermally sensitive material and expose the flow hole. The tag gas can then flow out of the flow hole and into the fuel pin.

System for ensuring a desired defrosting process for vehicle windows with simulation modules (3, 5, 6, 7) for modeling an air conditioning unit, an air conditioning duct, a vehicle interior and a window structure, as well as with an electronic computing unit (1) for carrying out a transient heat transport study of the model formed, wherein - given thermal output-related boundary conditions (MS, T_a, T_i, T_b) are input variables of the electronic processing unit (1), - an ice layer with a defined thickness (d_E) is simulated as part of the window structure and - the electronic computing unit (1) comprises a sub-module (8) for modelling the phase transition from ice to water taking into account the melting heat capacity (Cp (melting)).

The invention provides selective laser melting homogeneous powder and a method for preparing a composite material. The selective laser melting homogeneous powder comprises, by weight, 85%-98.5% of aluminum alloy powder, 0.5%-5% of titanium powder and 1%-10% of high-entropy alloy powder. Putting the weighed powder into a ball milling tank, introducing protective gas to exhaust air, and carrying out high-energy mixing by adopting high-efficiency mixing equipment without adding any grinding ball medium; according to the method, a ball-free mixing process and subsequent processes are cooperated, grains are greatly refined through the in-situ nucleation effect of Ti, a pinning grain boundary exists in an HEA phase, the brittleness temperature interval is reduced through preheating at 150 DEG C, stress concentration is scattered through rotation at 67 DEG C, and the thermal gradient and the stress field in the selective laser melting process are effectively managed; through the synergistic effect of multiple mechanisms, the problem of selective laser melting hot cracks of the aluminum-based composite material is solved; the product does not need any subsequent heat treatment, and the tensile strength of a printed part can stably reach 500 MPa in an As-bump state. The preparation process is simple, the period is short, the cost is low, and the yield is high.

The invention relates to an oriented polyester film and a manufacturing method thereof. The oriented polyester film comprises a polyester resin in which a diol component and a dicarboxylic acid component are polymerized. When analyzed by differential scanning calorimetry (DSC) after the first heat treatment and the second heat treatment, the oriented polyester film exhibits a first melting temperature (Tm1) and a second melting temperature (Tm2), and the ratio (H2 / H1) of the second melting heat (H2) at the second melting temperature (Tm2) to the first melting heat (H1) at the first melting temperature (Tm1) is not less than 0.1. The oriented polyester film according to the present invention can be used as a heat shrink film as a label and / or packaging of a plastic container, and particularly has excellent crystallinity, thereby improving the efficiency of a recovery process of a waste plastic container.

The utility model provides a thermal insulation cylinder for zone melting and a zone melting furnace with the thermal insulation cylinder. The thermal insulation cylinder for zone melting comprises a cylindrical body, a supporting layer is arranged on the outer side of the cylindrical body, an isolating layer is arranged on the inner side of the cylindrical body, and a thermal insulation layer is arranged between the supporting layer and the isolating layer. The device has the beneficial effects that the heat loss is reduced, the heating power requirement is reduced, the heat preservation effect is improved, a uniform temperature gradient is maintained in a melting region, a larger temperature gradient is prevented from being generated between the center and the periphery of the large-diameter single crystal, the thermal stress of the large-diameter single crystal is more uniform, dislocation or edge breakage is reduced, and the production efficiency is improved. And the growth stability and the finished product quality of monocrystalline silicon can be improved.

The utility model belongs to the technical field of thermal link temperature testing, and particularly relates to a thermal link temperature testing machine which comprises a supporting seat, a fixed seat is fixedly mounted on a chassis bottom plate, springs are mounted on the bottom sides of moving plates, a first electrode plate is fixedly mounted on the bottom side of one moving plate, and a second electrode plate is fixedly mounted on the bottom side of the other moving plate. Wherein a first electrode plate is fixedly installed on the bottom wall of one plate groove, a second electrode plate is fixedly installed on the bottom wall of one plate groove, the first electrode plate and the second electrode plate are fixedly connected with an indicating lamp through an internal circuit, a containing base is fixedly installed on the top sides of the multiple sets of movable rods, and a material collecting disc is placed on the containing base. When the thermal link is tested, molten drops on the thermal link drop down to the material collecting disc, so that an internal circuit of the indicating lamp is switched on, the indicating lamp is turned on and sends an electric signal to the display screen, the display screen records the temperature at the moment, the fusing temperature is determined, accurate testing of the thermal link is achieved through the structure, and the accuracy of the fusing temperature testing is improved.

A packaging insert (30) for a product (50) is produced by generating at least one imprint (15) in an unbonded air-laid web (10) made from natural fibers and a thermoplastic polymer binder. The unbonded air-laid web (10) is heated to at least partly melt the thermoplastic polymer binder and bind the natural fibers to form a bonded air-laid blank (20) conserving the at least one imprint (25). The packaging insert (30) is formed by cutting the bonded air-laid blank (20) following heating or by the unbonded air-laid web (10) prior to heating and comprises an imprint (35) configured to accommodate at least a portion of the product (50). The packaging insert (30) has excellent shock absorbing and insulation properties.

1. The name of the product of this design: Hot Melt Glue Machine (15L). 2. Purpose of the product of this design: used to melt hot melt adhesive and spray adhesive through a hose glue gun. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The technical problem to be solved by the present invention is to provide a diffusion source powder that can be uniformly adhered to the surface of a rare earth sintered magnet. According to the technical scheme for solving the technical problem, the manufacturing method of the diffusion source powder comprises the steps of preparing a rare earth alloy melt; and a step for forming a plurality of atomized powder particles from the melt heated to a temperature of 1100-1400 DEG C (inclusive) by an atomization method. And the rare earth alloy is R-M-A alloy. R includes at least one rare earth element and includes at least one of Nd and Pr. M is selected from at least one of Cu, Ga, Co and Fe. A represents at least one element selected from the group consisting of Al, Si, Ti, V, Cr, Mn, Co, Ni, Zn, Ge, Zr, Nb, Mo, Ag, and B.

The invention relates to the technical field of monocrystalline silicon manufacturing, in particular to a rapid ending method based on continuous Czochralski (CCz) single crystal, which comprises the following steps: when the length of a crystal bar reaches a set target length or a specified residual material weight, triggering a rapid ending program; in the first stage, the blanking speed of granular silicon of a granular silicon blanking device is reduced from a normal value to 50%-60% of an initial value at a constant speed, the melt heat consumption is reduced, and the radial temperature difference of the melt is reduced; synchronous speed increasing: after material dropping is started, the pulling speed of the crystal bar is increased to 1.6-1.8 times in a step manner, the diameter of the crystal bar is shrunk, and a solid-liquid interface is kept in a flat state; in the second stage, the blanking speed of the granular silicon blanking device is secondarily reduced to 20%-30% of the initial value. According to the technical scheme, heat is released through the heat capacity of the melt, spontaneous overall synchronous rising of the temperature is achieved through the melt heat capacity conservation principle, temperature lag from the edge to the center is eliminated, the temperature response rate is increased, radial temperature gradient decline is achieved, the tail subfissure extension length is reduced, and the ending time is shortened.

The invention belongs to the technical field of resistance heating repair, and discloses a method for in-situ resistance heating repair of a CFRP (carbon fiber reinforced plastic) composite material, and the CFRP composite material with a thermoplastic repair interlayer introduced between layers is prepared according to the preparation method. When interlayer damage occurs to the composite material, Joule heat generated by applying current to the composite material is used for melting the thermoplastic repair interlayer so as to bond interlayer damage cracks, and the service life of the CFRP composite material is prolonged. According to the method disclosed by the invention, thermoplastic repair interlayers (EMAACNT and EMAACNT-COOH) are introduced between layers of the CFRP composite material, and the prepared composite material is respectively named as CFRP / EMAACNT and CFRP / EMAACNT-COOH. When cracks appear between the composite material layers under the action of an external load, Joule heat generated by applying direct current to the composite material is used for melting the thermoplastic repairing interlayer, and then the cracks are bonded again, so that the purpose of repairing is achieved.

The application relates to the technical field of temperature regulation, and particularly discloses an ice-energy heat source ice-stab heat-melting heat pump unit. The ice-stab heat-melting heat pump unit comprises an ice-stab evaporator, a gravity liquid separator, a heat pump compressor, a gas storage separator and a flash expansion device. The ice-stab evaporator comprises an ice-water side shell pipe body and a working medium pipeline unit. The ice-stab evaporator is internally provided with a cavity. The side wall of the ice-stab evaporator is provided with a cold water inlet and an ice-water outlet. The working medium pipeline unit comprises an electrolytic layer ice-stab pipe. The outer wall of the electrolytic layer ice-stab pipe is fixedly provided with a plurality of protrusions. The gravity liquid separator is provided with a first air inlet, a first air outlet, a first liquid outlet and a first liquid inlet. The heat pump compressor is provided with an air suction port, an air exhaust port and a compression port. The cooling condenser is provided with a third air inlet, a second liquid outlet, a hot water return port and a hot water outlet. The gas storage separator is provided with a second air inlet, a second air outlet and an oil discharge port. The ice-stab heat-melting heat pump unit can improve the utilization rate of low-temperature energy.

In a preferred embodiment, there is provided a pipe fitting comprising a coupling body having an open end and a fusible sleeve sized to be received at the open end for engagement of a pipe thereto, the coupling body comprising a sidewall defining an internal bore sized for receiving at least a portion of the pipe with the fusible sleeve interposed between the sidewall and the pipe in an engaged position, the fusible sleeve having a tapered outer surface for frictional engagement with an inner surface of the sidewall, wherein the fusible sleeve comprises a thermoplastic material and an electrically conductive material combined with the thermoplastic material, the electrically conductive material being located to heat or melt the thermoplastic material upon induction heating of the electrically conductive material, thereby joining the coupling body and the pipe in the engaged position.

The present invention relates to an oriented polyester film and a method for producing the same. The oriented polyester film comprises a polyester resin in which a diol component and a dicarboxylic acid component are polymerized, and when analyzed by differential scanning calorimetry (DSC) after a first heat treatment and a second heat treatment, the oriented polyester film exhibits a first melting point (Tm1) and a second melting point (Tm2), and the ratio (H2 / H1) of the second heat of fusion (H2) at the second melting point (Tm2) to the first heat of fusion (H1) at the first melting point (Tm1) is 0.1 or higher. The oriented polyester film according to the present invention can be usefully used as a heat-shrinkable film applied as a label and / or packaging for plastic containers, and in particular, because it has extremely excellent crystallinity, it improves the efficiency of the recycling process for waste plastic containers.

This biaxially-oriented polyolefin film is characterized in that: the proportion S of the melting heat amount in the range of 175-190°C to the melting heat amount in the range of 30-190°C obtained by differential scanning calorimetry is 10-70%; the biaxially-oriented polyolefin film has two layers having different contained amounts of a 4-methyl-1-pentene polymer; when, of the two layers, a layer having a smaller contained amount of the 4-methyl-1-pentene polymer is referred to as a layer A and the other layer having a greater contained amount thereof is referred to as a layer B, the layer B is positioned on at least one surface of the film; and the layer B contains the 4-methyl-1-pentene polymer as the main component. Provided is a biaxially-oriented polyolefin film that can be suitably used even in a high temperature environment in which conventional biaxially-oriented polyolefin films cannot be used as a release film or a process film.

A heat-shrinkable polyester film having an improved recyclability and excellent attachment and appearance is provided. The heat-shrinkable polyester film, having a property (A) in which a clumping fraction of a polyester resin or the like is 1.2% or less, a property (B) in which a melting point is 190° C. to 230° C., a property (C) in which a melting heat quantity is 25 to 45 mJ / mg, and properties (D1) to (D4) in which a thermal shrinkage ratio in a main shrinkage direction measured under thermal shrinkage conditions at 60° C., 70° C., and 80° C. for 10 seconds is 0 to 5%, 25 to 50%, 55 to 85%, and a standard deviation of the value of the thermal shrinkage ratio measured at 95° C. to 100° C. for 10 seconds is 1.5% or less.

The utility model provides a quantitative feeding device for a vacuum die-casting machine and a feeding method of the quantitative feeding device, and belongs to the technical field of feeding devices. The feeding device comprises a vacuum exhaust system, a mold cavity, a melting cup, an alloy melt holding furnace and a punch. According to the feeding method, the principle of dynamic pressure difference and dynamic height difference is utilized, the quantitative weight is set, and precise aluminum alloy die-casting quantitative feeding is achieved in the mode that the pressure difference between the atmosphere and a mold cavity and / or melting cup vacuum and the liquid level height difference between the melting cup and an alloy melt heat preservation furnace are balanced. According to the utility model, the melting cup is communicated with the alloy solution holding furnace through the riser tube, the alloy solution in the melting cup is injected into the mold cavity through the punch, and the liquid suction process is the exhaust process, so that the filling rate can be improved or completely canceled, the quantitative feeding and vacuum exhaust efficiency is greatly improved, the feeding and injection time is shortened, and the production efficiency is improved. The defects caused by temperature drop of conventional alloy feeding are avoided, the production efficiency is improved, and the equipment cost is greatly reduced.