208 results about "Melt temperature" patented technology

A screen making machine includes a table, welder assembly, and actuation assembly. The welder assembly includes: a hot air nozzle, a pump, and a roller. The actuation system moves the welder assembly along the frame. Hot air from the nozzle elevates the temperature of the mesh and adjacent frame to an elevated temperature above a melt temperature of the surfaces of the mesh and frame. The roller presses the melted mesh surface against the melted frame surface, to melt fuse them together.

The invention relates to a copper cable insulation layer extrusion molding method and system based on dynamic temperature control, and belongs to the technical field of copper cable production. The method comprises the steps that the surface temperature of a copper core before the copper core enters an extrusion die head and the melt temperature of a plurality of independent temperature control sections divided by the extrusion die head in the material advancing direction are obtained in real time; meanwhile, feedback adjusting quantity is calculated based on the temperature difference between the melt temperature and the preset target melt temperature, the feed-forward compensation quantity and the feedback adjusting quantity are superposed to obtain comprehensive adjusting quantity of the heating power of each section, and real-time closed-loop adjustment is conducted on the heating power of each section of the extrusion die head according to the comprehensive adjusting quantity; and the flow and the temperature of the cooling medium are adaptively adjusted according to the temperature gradient of the surface temperature along the axial direction, and non-uniform gradient cooling is carried out on the insulating layer. The copper cable insulation layer extrusion molding method and system based on dynamic temperature control at least solve the problems of poor thickness uniformity of an insulation layer, large internal residual stress and unstable adhesive force with a copper core in the prior art.

The invention belongs to the technical field of material processing, and discloses a magnesium alloy casting semi-solid injection molding method and application, and the method comprises the following steps: checking and adjusting a semi-solid injection machine, a casting mold and other equipment to be in a normal state, and placing magnesium alloy particles in a designated area of a hopper; putting a long nozzle of the semi-solid injection platform into the center of a mold sprue; setting the temperature of each section of a mold temperature controller, a charging barrel and a nozzle; preserving heat for a period of time after the temperature of the charging barrel reaches a set value, so that the temperature of materials in the charging barrel is uniform; setting the injection rate, the cooling time, the material return distance and the melt pressure of the semi-solid injection machine; and after a release agent is quantitatively sprayed to the mold, a semi-solid injection program is started, and a casting is obtained. The AS41B magnesium alloy particles with good heat resistance are adopted as the raw material, the semi-solid injection molding method is combined, a melting furnace is not needed, only heating to the semi-solid state is needed, the melt temperature is low, energy is saved, the service life of a mold is prolonged, protective gas is not needed, and the manufactured casting is good in mechanical property and high in heat resistance.

The invention discloses a method for step-by-step impurity removal in crude copper fire refining, and belongs to the technical field of metallurgical technologies. The method comprises the following steps: (1) removing As and Sb in an oxidation stage: heating and melting crude copper, blowing oxygen, and adding an impurity remover to remove As and Sb impurities in the crude copper; (2) removing Pb and Ni in an oxidation stage: after the impurity removal agent is added in the step (1) for reaction, adding a composite impurity removal agent, continuously blowing oxygen, stopping blowing oxygen until the oxygen content in the melt is 0.6-0.8% by mass, and slagging off to remove Pb and Ni impurities; and (3) deoxidation in a reduction stage: after slagging-off in the step (2), adjusting the temperature of the melt to a reduction temperature, adding high-sulfur pulverized coal in twice, and removing oxygen in the melt to complete impurity removal. According to the method, the impurity removal agent and the impurity removal process are optimized, and the impurity removal effect of the crude copper is remarkably improved through the synergistic effect.

The invention discloses a high-toughness PPR pipe machining device which comprises an extrusion system, a pulsation mixing system, a melt online monitoring device, a sizing cooling system, a traction device and a winding device. The extrusion system is used for melting and conveying raw materials, and the pulsation mixing system is used for deeply mixing a melt by utilizing a periodic disturbance structure, so that a toughening agent and a copolymerization component are more uniformly dispersed in the melt. The melt on-line monitoring device can detect the temperature, pressure and dispersity of the melt in real time, so that the extrusion process is monitorable. The sizing cooling system adopts a subsection cooling mode of rapid cooling, constant-temperature slow release and low-temperature shaping, and stable shape control is achieved through vacuum sizing. The traction device and the winding device are used for keeping the production rhythm stable and achieving continuous winding of the formed pipe. According to the invention, the melt mixing quality can be improved, the cooling internal stress is reduced, and the toughness and dimensional stability of the PPR pipe are improved.

The invention discloses a modified plastic processing temperature adaptive control method, and relates to the technical field of high polymer material processing control, and the method comprises the following steps: collecting the same frequency mapping of power grid disturbance and melt temperature response, capturing the transient power fluctuation of a heating unit with millisecond-level time precision by adopting a phase comb sampling technology, and constructing a power pulse fingerprint database; a parameter space for discriminating a pseudo-steady state is established based on a power pulse fingerprint database, a short-time power pulse signal and a stable signal are classified by using a phase lag and entropy increase dual-threshold method, and a pseudo-steady state confidence index is generated. According to the method, the power pulsation fingerprint database and the electrothermal coupling model are constructed, pseudo-steady-state temperature control abnormity is accurately recognized, reverse energy regulation and control are achieved in combination with a sensitivity track and a thermal write-back mechanism, the melt temperature stability is improved, the product warping rate is effectively reduced, and the size consistency and the mechanical property are remarkably optimized.

The invention relates to the technical field of PE lamination production control, and discloses a distributed control system for a high-speed PE lamination production line. A base material state monitoring module of the system collects surface tension parameters and thickness distribution data of a base material in real time, and a dynamic base material state matrix is generated in combination with the operation speed of the base material; the temperature field coordination module is used for matching a preset melt temperature gradient curve according to thickness distribution data in the dynamic base material state matrix and generating a partition temperature regulation and control instruction set; the extrusion pressure balance module analyzes the pressure fluctuation historical record of each extrusion section based on the partition temperature regulation and control instruction set, calculates the pressure compensation amount of adjacent sections and generates a pressure balance parameter table; the film layer fusion control module receives the compensation amount data, adjusts the rotating speed difference of the double-screw extruder and the opening degree parameter of a die head in combination with the real-time melt casting speed, and outputs a film layer fusion quality index; and the distributed execution module decomposes the film fusion quality index into independent control instructions and synchronously issues the independent control instructions to each execution unit.

The invention relates to the technical field related to process parameter management, in particular to a multi-modal data driven foamed aluminum process parameter optimization method and system, and the method comprises the steps: obtaining a foamed aluminum process parameter set, and configuring a process feature vector; according to the porosity standard deviation, the density uniformity index and the modified compressive strength variable coefficient of the foamed aluminum finished product, a melt temperature regulation and control subsequence and a foaming agent adding subsequence are determined, a control instruction set is generated in combination with a process feature vector, and synchronous issuing is performed by using an industrial Internet of Things gateway. The technical problems that foamed aluminum technological parameter optimization mostly depends on single parameter adjustment, the matching degree of parameter adjustment and finished product quality characteristics is low, and foamed aluminum production stability is limited are solved, collaborative optimization of melt temperature adjustment, foaming agent adding and mold pressure adjustment is achieved, a control instruction set is generated, and the production efficiency is improved. Therefore, the porosity standard deviation of the foamed aluminum finished product is reduced, the density uniformity index is improved, and the technical effects of process stability and finished product quality consistency are improved.

The invention relates to the technical field of robot control, and particularly discloses a cable coating robot control method and system capable of gaining along with speed, and the method comprises the steps: detecting the cable traction speed, the extruder screw torque, the actual coating melt temperature and the die head pressure in real time; determining a compensation gain based on the extruder screw torque, the actual temperature of the coating melt and the calibration basic gain; determining an output gain based on the cable traction speed-gain segmentation mapping function; calculating a final gain based on the absolute deviation between the die head pressure and the set pressure and the output gain; controlling the output flow of the extruder based on the final gain and the cable traction speed; according to the invention, precise regulation and control of the output flow of the extruder are realized, and the stability and consistency of the cable coating process are ensured, so that the cable coating quality is improved, the material waste is reduced, and the production efficiency is improved.

This invention relates to the field of vacuum melting technology, and in particular to a vacuum melting furnace for copper alloys and its ultrasonic-assisted melting method, comprising the following steps: placing copper alloy raw materials into a crucible and drawing a vacuum, then filling with argon gas to a slightly positive pressure; performing induction heating to a temperature 50-120°C above the melting point to obtain a melt; lowering an ultrasonic probe into the melt for continuous ultrasonic treatment; reducing the induction heating temperature to 20-60°C above the melting point and continuing ultrasonic treatment; induction heating to the melt temperature being the pouring temperature, performing pulsed ultrasonic treatment, and pouring the melt into an ingot mold; allowing the melt in the ingot mold to continue cooling with the furnace, then removing the vacuum and opening the furnace to obtain a copper alloy ingot. This invention, using the above steps, reduces gas content, increases ingot density, effectively removes non-metallic impurities, improves copper alloy purity, refines grains, and reduces secondary oxidation and gas entrapment during pouring.

Methods of three-dimensional printing can include iteratively applying a polymer build material as individual layers to a powder bed, where the polymer build material includes from about 80 wt % to 100 wt % polymer build particles, and based on a three-dimensional object model, selectively applying a binder agent including an aqueous liquid vehicle and polymer binder particles onto the individual layers of the polymer build material. The polymer binder particles have or are capable of having a melting temperature lower than a melting temperature of the polymer build particles. The methods can include exposing the powder bed to heat at a temperature less than a melting point of the polymer build particles but greater than a melting temperature of the polymer binder particles. The heat causes the polymer binder particles to melt to adhere the polymer build particles together to form a three-dimensional object.

The invention relates to an overmolded composite structure. The invention relates to a composite material comprising: i) a first component (C1) comprising at least one fibrous material and a matrix resin component comprising at least one polyamide having a number average molecular weight Mn between 3,000 and 35,000 g / mol, preferably between 5,000 and 20,000 g / mol, preferably between 5,000 and 15,000 g / mol, preferably between 5,000 and 10,000 g / mol, and i) a second component (C1) comprising at least one fibrous material and a matrix resin component comprising at least one polyamide having a number average molecular weight Mn between 3,000 and 35,000 g / mol, preferably between 5,000 and 10,000 g / mol; and a melt viscosity, measured in capillary rheology, of between 0.05 and 1000 Pa.s, preferably between 0.1 and 1000 Pa.s, preferably between 0.3 and 1000 Pa.s, preferably between 0.3 and 500 Pa.s, more preferably between 0.3 and 250 Pa.s, e.g. Between 0.3 and 100 Pa.s, even more preferably between 0.3 and 50 Pa.s, more preferably between 0.3 and 25 Pa.s, measured at a shear rate of 1800 s-1 at Tf + 50 DEG C (Tf is the melting temperature of the at least one polyamide), even more preferably between 0.3 and 10 Pa.s, preferably between 0.3 and 5 Pa.s; and ii) a second component (C2) comprising an overmolded resin component, the first component C1 having at least one surface S, and the component C2 being adhered to the component C1 over at least a portion of the surface S.

Embodiments relate to a multilayer structure including an adhesive layer and, in direct contact therewith, a layer forming a support film, in which the adhesive layer includes a polyolefin A and a functionalized polyolefin and has a melting temperature of between 80° C. and 120° C., and in which the support film includes a polyamide graft polymer and has a flow temperature of greater than 160° C. Embodiments also relate to a process for manufacturing same, to the use of such a multilayer structure for manufacturing photovoltaic modules and to a process for manufacturing such modules, and also to these photovoltaic modules per se.

The application discloses a kind of aluminum scandium alloy target material component detection method and application thereof, belong to alloy detection technical field.The detection method includes the following steps: aluminum scandium alloy target material is placed in suspension smelting furnace, and with 200~300kw / min Speed regulation power to 350~550kw is melted, after alloy melt is fully melted 20s~50s inside test and record corresponding melt temperature, and with aluminum scandium alloy target material theoretical melting point is compared, obtains aluminum scandium alloy target material component information;The detection method provided by the application can be nondestructive, quickly, low-cost to obtain the component information in aluminum scandium alloy target material;And the aluminum scandium alloy target material component detection method of the application can be applied to actual aluminum scandium target blank production process, so as to help quickly, accurately, efficiently and low-cost to produce specific scandium content aluminum scandium target blank;Meanwhile, the detection method provided by the application is simple to operate, and can be beneficial to practical production.

The present invention relates to a method of manufacturing a wrinkle-free fabric and a composite structure comprising a wrinkle-free fabric with an adhesive and a preform comprising a wrinkle-free fabric with an adhesive. The method of manufacturing the wrinkle-free fabric comprises providing a plurality of continuous fiber layers held together by stitching threads; and applying an adhesive between adjacent layers of the plurality of continuous fiber layers and on outer layers of the plurality of continuous fiber layers, wherein the activation temperature of the adhesive is lower than the melting temperature of the stitching threads.

A method for reducing or eliminating Si contained in an aluminum alloy including: holding the aluminum alloy and Sn at a melt temperature at which the aluminum alloy and Sn are melted; lowering the melt temperature, and holding the aluminum alloy and Sn at a Si crystallization temperature at which solid Si is crystallized while maintaining a molten state of Sn and Al, and separating the solid Si; and further lowering the temperature and holding the aluminum alloy and Sn at an Al crystallization temperature at which Al is crystallized and Sn is in the molten state, to separate and recover solid Al.

The invention relates to a system and a method for manufacturing a large corrugated part from a thermoplastic laminate. Systems and methods for manufacturing parts are disclosed herein. An example method includes heating a consolidated laminate to a heating temperature below a melting temperature of a thermoplastic resin to form a heated consolidated laminate, the consolidated laminate including a plurality of plies, each ply made of fibers embedded in the thermoplastic resin. The method further includes forcing the heated consolidated laminate against the contoured forming surface of the mold until the shape of the heated consolidated laminate corresponds to the contoured shape of the contoured forming surface of the mold.

The invention relates to a copper microsphere and a preparation method and application thereof. The preparation method of the copper microspheres comprises the following steps that mixed powder containing copper oxide powder and graphite powder is subjected to first heat treatment in a reducing atmosphere, the copper oxide powder in the mixed powder is reduced into copper powder, and mixed copper powder is obtained; the mixed copper powder is subjected to second heat treatment, copper powder in the mixed copper powder is molten, and copper liquid is obtained; the molten copper is rapidly cooled to the temperature below the copper melting temperature, the molten copper is solidified into copper microspheres, the graphite powder is removed, and the copper microspheres are obtained; wherein the extremely fast cooling time is less than or equal to 5 ms. According to the preparation method, the sphericity degree of the copper microspheres can be effectively improved.

The application discloses a ZrN coating and a preparation method and application thereof, and belongs to the technical field of coating. The preparation method comprises the following steps: S1, depositing a PVD nitride coating on the surface of a metal-based substrate; S2, zirconium infiltration treatment: the furnace pressure in a vacuum furnace is extracted to be less than or equal to 200 Pa, then heating to completely melt a zirconium-based amorphous blank into a melt, then hot-dipping the PVD nitride coating into the zirconium-based amorphous melt, keeping warm for a period of time, then taking out, and preparing a ZrN coating; wherein, in the step S1, the thickness of the PVD nitride coating is 1-10 microns; in the step S2, the temperature of the zirconium-based amorphous melt is 1000-1500 DEG C, and the keeping warm time is 0.5-10 hours. The ZrN coating prepared by the application has a thickness of more than 2 microns, and the ZrN coating has excellent hardness, wear resistance, corrosion resistance and conductivity, and can be used as a fuel cell bipolar plate protective coating and a medical instrument coating.

The present application relates to a kind of Bi-doped rare earth iron garnet body single crystal growth techniques without substrate, comprising the following steps: raw material preparation, melt preparation, melt is cooled to crystal growth temperature, after melt temperature stabilizes, slowly lower the seed crystal rod installed with seed crystal, with melt, seed crystal rotates at a certain speed;During growth, crystal growth is carried out according to the set variable speed cooling curve, and block crystal is obtained after growing for a period of time;Block crystal is pulled out from melt, and slowly cooled to room temperature, and Bi-doped rare earth iron garnet body single crystal is obtained.The present application obtains large-size block single crystal, gets rid of the dependence of existing Faraday optical rotator growth on substrate, and reduces production cost.The present application can obtain Faraday optical rotator which is thinner than existing product thickness at the same wavelength, further reducing the volume.Moreover, multiple surfaces are simultaneously grown, and larger size crystal is obtained.

A nonwoven fabric (NF) comprising a multilayer structure, the multilayer structure comprising: i) at least one meltblown layer (M) comprising meltblown fibers (MBF) comprising a first propylene polymer (PP1) having: a) an amount of 2,1- region defects in the range of 0.0 to 0.1 mol%; and b) a melting temperature T in the range of 155 to 170°C. m ii) at least one spunbond layer comprising spunbond fiber (SBF) comprising a second propylene polymer (PP2) having: a) an amount of 2,1- region defects in the range of 0.4 to 1.5 mol%; and b) a melt temperature T in the range of 145 to 160 °C. m The melting temperature T of the first polypropylene polymer m (PP1) has a higher melting temperature than the first polypropylene polymer (T). m (PP2) at least 5.0°C.

The application provides a PVC film preparation system and method based on industrial intelligent vision. In a stable production process of an extruder, an extruder screw torque signal and a melt temperature signal are collected, and a PVC film surface image sequence is obtained in real time. A black point density change rate per unit area in the PVC film surface image sequence is counted, and an area distribution feature of the black points in the PVC film surface image is extracted. A torque fluctuation amplitude in the screw torque signal and an over-threshold integral quantity of the melt temperature signal are calculated. The area distribution feature, the torque fluctuation amplitude and the over-threshold integral quantity are used to determine the causes of the black points in the PVC film preparation, and a determination result of the causes of the black points is obtained. Based on the black point density change rate and the cause category of the determination result, a parameter adjustment amount is calculated, and a speed adjustment amount and a maintenance time required to reduce the black point density to a target value are output. Based on the above scheme, cause category quantitative determination based on multi-source signal fusion can be realized.

The invention relates to the field of physical foaming. The method includes the following steps: crosslink the foaming matrix to obtain a plurality of crosslinked prefabricated products, add the crosslinked prefabricated products into a reaction reactor filled with polar liquid, add nitrogen for foaming, relieve pressure, and heat for foaming to obtain the foaming materials. In the polar liquid system, the inventor finds that the ratio of the distance between the adjacent crosslinked prefabricated products to the thickness of the prefabricated products as well as the difference between the melting temperature of the polymer and the temperature of the polar liquid need to be controlled to promote the adjacent prefabricated products in full contact with the polar liquid, and prefoaming can be carried out under the condition of low temperature difference, namely, at the low temperature of the polar liquid.

The invention relates to the technical field of recycled plastic injection molding, and discloses a control method and system for plastic flowerpot injection molding, and the system comprises a recycled material recognition module, a recycled material spectrum module, an injection molding recognition module, an adjustment judgment module and a compensation module. The system calculates a mixed melting behavior index by detecting the component proportion of the reclaimed materials, constructs a reclaimed material variation spectrum in combination with historical batches, and recognizes a characteristic stage in the injection molding process. Based on data such as die cavity pressure, melt temperature, back pressure and screw displacement which are collected in real time, a working condition deviation function is calculated, and a matched regulation and control combination is selected through a multi-parameter weighting function to regulate and control actions. And after injection molding is finished, if the deviation integral exceeds the threshold value, the control model is updated, and a compensation action record is generated. According to the invention, the adaptability and quality control precision of the reclaimed material injection molding process are improved, and the problem of unstable molding caused by physical property fluctuation of the reclaimed material is effectively solved.

The present invention relates to a filter module comprising a membrane (3), an edge structure (2), and an anchoring element (1), wherein the edge structure (2) is arranged over a surface of the membrane (3) in an edge region thereof and is embedded in the anchoring element (1), a difference between melting temperatures of the membrane (3) and the anchoring element (1) is from –25 K to 60 K, and a difference between melting temperatures of the edge structure (2) and the membrane (3) is 15 K or more. Moreover, the present invention relates to a method for producing the filter module as well as the use of the filter module for filtering a fluid medium.

The invention relates to a method for preparing a deposition surface (110) of a draping tool (100) configured for draping a prepreg comprising a thermoplastic polymer matrix, the method comprising the steps of: preparing the deposition surface (110); depositing a thin layer (320) of a thermoplastic polymer onto at least a portion of the prepared deposition surface (110); wherein a melting temperature of the thermoplastic polymer in the thin layer is equal to or greater than a melting temperature of the thermoplastic polymer matrix. The invention also relates to a tool obtained by such a method.

Disclosed herein are low cure powder coating compositions that are curable at a non-limiting temperature of 120 to 125 °C for a non-limiting time period of 5 to 10 minutes. The compositions may include phenolic and / or an amine crosslinking agents having low melting temperatures. The compositions also include low melting epoxy resins.

An illustrative example embodiment of a method of making a concrete expansion joint insert includes moving a material including a resin having a melt temperature through a die having a flow passage that ends in an exit having a selected geometry, increasing a temperature of only a segment of the die near the exit to an elevated temperature that is at least 1.5 times the melt temperature, and increasing the temperature of a portion of the material to an increased temperature above the melt temperature through contact with the segment having the elevated temperature.

A method for producing a 3D item (1) by means of fused deposition modelling of 3D printed material (202) on a receiver item (550), wherein the 3D item (1) comprises a plurality of layers (322) of 3D printed material (202); wherein: (a) the printable material (201) comprises a semi-crystalline polymer; (b) the 3D printable material (201) has (i) a melting temperature range, ranging from a first melting temperature TM1 to a second melting temperature TM2, wherein TM2>TM1, and (ii) a crystallization temperature range, ranging from a second crystallization temperature Tc2 to a first crystallization temperature Tci, wherein TC2>TC1; (c) the 3D printing stage comprises guiding the 3D printable material (201) through a printer nozzle (502) at a nozzle temperature TN; wherein TN>TM2; (d) the method comprises during a first sub-stage of the 3D printing stage: depositing 3D printable material (201) on the receiver item (550) having a first receiver item temperature TB1, to provide n1 first layers (1322) on the receiver item (550); wherein TB1>TM2; (e) the method comprises during a second sub-stage of the 3D printing stage: cooling n12 first layers of the n1 first layers (1322) and selecting a second receiver item temperature TB2 of the receiver item (550), wherein TN2<TB1; and (f) the method comprises during a third sub-stage of the 3D printing stage: depositing 3D printable material (201) on the previously deposited n1 first layers (1322), to provide n2 second layers (2322) thereon.

The invention relates to the field of wood-plastic composite materials, and discloses a preparation method of a carbonized wood fiber composite wall panel, and the wall panel is composed of the following components by weight: 30-60 parts of carbonized wood fiber; 20 to 40 parts of resin powder; 5 to 25 parts of stone powder; 1-8 parts of paraffin wax; 0-3 parts of a lubricant; the carbonized wood fiber is carbonized powder obtained by carrying out heat treatment on natural wood for 3-5 hours at the temperature of 160-180 DEG C and then carrying out cooling and crushing treatment, and the particle size of the carbonized powder is 60-100 meshes; and the resin powder is thermoplastic polymer powder with the melting temperature of 150-170 DEG C, and is selected from polypropylene. By introducing the combination of the carbonized wood fiber and the microcrystalline wax, the waterproofness, the dimensional stability and the processability of the composite material are improved, the environment-friendly material which is high in strength, durable and easy to process is realized, and diversified market requirements are met.