7179 results about "Extrusion" patented technology

An aluminum mullion and method for creation by an extrusion and castellation process for use in a construction section. The aluminum mullion may comprise a first end, a second end having a guide track; a height, and a mullion body positioned between the first end and the second end. The aluminum mullion may be extruded by pushing semi-molten aluminum through a steel die under high pressure to create a monolithic beam shape and then at least one portion of the mullion body is removed by the castellation process. Multiple portions of the mullion body may be removed along the height of the mullion as needed for construction requirements.

The invention relates to the technical field of high polymer material processing, in particular to an insulation board extrusion molding control method and system.The method comprises the steps that 1, multi-dimensional parameters are collected in real time, at least three detection sections are arranged on an outlet section of a die head of an extruding machine in the material flowing direction, and each section synchronously collects the following data; 2, evaluating the rheological state of the melt in real time; 3, dynamically reconstructing a temperature field, dividing the die cavity into an axial independent temperature control section and a circumferential heating unit, and dynamically adjusting the power of the heating unit according to a state judgment result in the step 2; 4, pressure-rotating speed cooperative compensation is carried out; and 5, closed-loop verification is carried out, the density uniformity of the formed plate is detected after the adjustment instruction is executed, and if the density range exceeds the limit, the step 2 is executed again. By accurately controlling the temperature and the concentration of the foaming agent, the feasibility of high-proportion mixing of the reclaimed material is optimized, the quality fluctuation caused by temperature and viscosity fluctuation is reduced, and green manufacturing, energy conservation and consumption reduction are promoted.

The invention is suitable for the field of film manufacturing, and provides a PO film tape casting process which comprises the following steps: S1, raw material pretreatment; s2, mixing the materials; s3, melt extrusion; s4, carrying out tape casting; s5, cooling and shaping; s6, thickness detection and adjustment; s7, carrying out post-treatment; and S8, rolling is conducted. According to the invention, the three-stage gradient cooling process significantly reduces the internal stress of the film, improves the dimensional stability, and reduces the warping shrinkage of subsequent processing; the thickness deviation of the thin film is controlled within + / -0.01 mm through an online thickness detection and automatic adjustment system, so that the product precision is improved; the surface tension of the film is stably improved by the corona post-treatment process, and the application scene is widened; through strict raw material pretreatment, the bubble defect of the film is effectively avoided, and the appearance quality of the product is improved; and a combined process of high-speed mixing and double-screw extrusion is adopted, so that uniform dispersion and full plasticization of the materials are ensured, and the problems of crystal points, stripes and the like are reduced.

The invention discloses a double-PHA barrier system for a paper-based container and a paperboard as well as a preparation method and application of the double-PHA barrier system, and belongs to the technical field of paper-based material surface engineering and green packaging. The system sequentially comprises a paper base material, a water-based PHA dispersion hole sealing layer and a PHA extrusion compact layer from inside to outside. According to the invention, the micron-sized PHA dispersoid without cell debris is utilized, so that an efficient hole sealing effect which is difficult to achieve by a high coating amount in a traditional process can be achieved by only needing an extremely low coating amount, and the pinhole defect of an extrusion layer is eliminated from the source. And in cooperation with the modified PHA extrusion layer with the specific crystallinity, the problem of micro-cracking of a single coating during edge rolling forming is cooperatively solved. According to the system, excellent barrier performance is achieved through a thinner bio-based structure, and meanwhile the system has a wide heat sealing window and excellent repulp recycling performance. Compared with the prior art, on the premise that high performance is guaranteed, the consumption amount of packaging materials and the environmental burden are remarkably reduced.

The invention provides a method for preparing a single-material VMPE recoverable hose through dynamic temperature control multi-layer co-extrusion. The method comprises the steps that infrared temperature measurement modules are installed on all sections of an extruder respectively to construct a dynamic temperature control system; feeding the pretreated raw materials into a corresponding extruder, and adjusting a heating device and a cooling device of a charging barrel of the extruder in real time according to a preset extrusion temperature allowable range through a dynamic temperature control system to obtain a plasticized melt; carrying out bonding treatment on the plasticized melt by utilizing an ultrasonic vibration composite technology to obtain a multi-layer reinforced melt; detecting the thickness of the pipe wall of the multi-layer reinforced melt through a hyperspectral imager and judging whether the thickness of the pipe wall is qualified or not; if not, pipe wall thickness deviation data are fed back to a dynamic temperature control system and an extruder control system to conduct linkage adjustment on extrusion parameters; and if the multi-layer reinforced melt is qualified, cooling shaping and fixed-length cutting treatment are conducted on the multi-layer reinforced melt, the finished recoverable hose is obtained, and the hose forming precision and the recovery performance are effectively improved.

The invention relates to the technical field of powder metallurgy, in particular to a preparation process of a graphene composite profile prepared from brass waste, which comprises the following steps: selecting the brass waste containing different components according to the application scene of the graphene composite profile; the brass waste materials are smashed into brass block-shaped smashed materials; the preparation method comprises the following steps: adding 0.001-10% by mass of graphene into the brass block-shaped crushed aggregates, and carrying out wet ball milling to form a first-size mixed powder liquid; carrying out semi-solid rotary shearing and stirring processing on the mixture; and continuously extruding the graphene-brass mixed base material to form a graphene composite profile blank, and carrying out post-process to obtain the graphene composite profile capable of overcoming brass spot, line and surface defects. According to the invention, a powder metallurgy process is combined with a medium-temperature continuous extrusion process, so that the brass waste is efficiently and directly recycled without pollution, and the physical properties and chemical properties such as hardness, strength, conductivity, corrosion resistance and high-temperature creep resistance of the composite material are greatly improved. The invention further correspondingly discloses the graphene composite profile and application.

The invention discloses an electric power distribution method convenient for maintenance. By arranging a second threaded column (21) and an extrusion plate (22), when the second threaded column (21) rotates, the extrusion plate (22) can be driven to rotate, then the extrusion plate (22) can drive a friction pad (27) to rotate, and when the friction pad (27) is connected with the lower surface of the inner wall of a shell (1) in a lap joint mode, a support plate (17) can be fixed; and by arranging a stop block (28), when the back face of a second protection plate (10) is connected with the front face of the stop block (28) in a lap joint mode, a first threaded column (13) can be more conveniently connected with a second threaded sleeve (14), and therefore the second protection plate (10) can be better fixed. The electric power distribution method convenient for maintenance has the advantages that the structure is compact, the design is reasonable, and the practicability is high.

The invention relates to a method for preparing a carbon nanotube reinforced copper-silver-based electrical contact composite material based on a liquid phase atomization method, and belongs to the technical field of electrical contact preparation. The preparation method comprises the following steps: carrying out hot pressed sintering on mixed powder of reinforcement powder, copper powder and silver powder, solidifying the powder to form an Ag-coated CNTs / Cu-Ag composite material block, and then preparing the Ag-coated CNTs reinforced Cu-Ag-based electrical contact composite material through a process route of solid solution, extrusion and aging. The preparation method disclosed by the invention is simple to operate and stable in preparation process, and the mechanical and electrical properties of the prepared composite material can respectively reach 157HV and 103% IACS (International Annealed Copper Standard) and above; according to the method, ablation and damage of the surface of the electrical contact in the working process are relieved, the viscosity of a molten pool is increased, the contact resistance in the electrical contact process can be reduced, the current concentration phenomenon and the temperature rise effect at a contact point can be relieved, the mass loss of an electrical contact material is reduced, the maintenance cost is reduced, and the method has good application prospects in the field of electrical contact materials.

The utility model discloses a galvanized sheet cutting and polishing integrated device which comprises a concave conveying table, a machining table and a machining support, and relates to the technical field of galvanized sheet production. For example, a flexible telescopic cutting knife, limiting and buffering of an arc slide way, precise rotation of a polishing wheel and the like are achieved. Therefore, the system can be kept stable when treating the galvanized sheet, and accurate cutting and grinding effects are achieved; according to the system, the multiple lifting hydraulic push rods, the lifting lead screw modules, the arc sliding blocks and the like are used for multi-axis linkage, the positions of all components can be rapidly and accurately adjusted, and the machining efficiency is improved; through flexible extrusion and extrusion limiting and fixing at the upper end and the lower end, the system can process various galvanized plates with different sizes and shapes, and the material adaptability is high; the whole process including cutting, grinding, moving and the like is completed through a series of automatic mechanical structures, manual intervention is reduced, and the production efficiency is improved.

The invention relates to the technical field of plasma cutting equipment, and discloses metal plate cutting equipment which comprises a bottom frame, a cutting mechanism, a cleaning mechanism and a collecting mechanism, the cleaning mechanism comprises a mounting plate, a polishing plate, an extrusion spring, an abutting plate and a water cooling assembly, and the mounting plate is slidably connected to the bottom frame through the collecting mechanism; a mounting groove is formed in the mounting plate, the extrusion springs are fixedly connected to the bottom and the top in the mounting groove, the abutting plate is fixedly connected to the extrusion springs, the grinding plate is detachably mounted on the abutting plate, the collecting mechanism is used for collecting slag falling during grinding, and the cutting mechanism is used for cutting a metal plate. The cleaning mechanism is arranged to be matched with the collecting mechanism, after the metal plate is cut, slag and burrs on the upper surface and the lower surface of the metal plate are polished, the burrs and the slag on the surface of the metal plate are removed and collected, and therefore the situation that the burrs and the slag remain on the surface of the metal plate, and the subsequent plate machining quality is affected is prevented.

The invention belongs to the technical field of CPVC (chlorinated polyvinyl chloride) pipeline processing, and discloses a CPVC pipeline extrusion die with a composite runner, which comprises an extruder and a die mechanism mounted on the extruder, and further comprises an adjusting assembly arranged in the die mechanism; the bolt assembly is installed on the die mechanism and used for driving the adjusting assembly to move in the axial direction. According to the scheme, after an extruder is stopped firstly, an operator rotates a bolt body to drive a first convex shaft to move downwards in a chute through a U-shaped piece, then a sleeve rod is pushed to move to block the inner end of a first runner, meanwhile, movement of the sleeve rod can drive a mold core rod and a connecting piece to move, and then a mold head cavity communicates with a second runner through a material flowing pipe; and the extruder is operated after the adjustment is finished, so that the downtime of the extruder is shortened, the adjustment efficiency is improved, and the problem that the pipeline extrusion efficiency is reduced due to long-time downtime of equipment when the extrusion die head of the extruder is replaced is solved.

The invention discloses a multi-material 3D printing device based on a photo-thermal coupling effect and a forming method of the multi-material 3D printing device, and relates to the field of additive manufacturing. The light source device is a semicircular convergent photo-thermal emitting device, 360-degree light source irradiation can be achieved, and illumination is uniform. After the slurry is extruded, the ultraviolet curing process can be immediately carried out, and the phenomenon that a printed entity collapses due to the influence of gravity factors caused by untimely light source irradiation can be obviously reduced. By adjusting the frequency and duty ratio of the light source, the temperature and illumination intensity of the slurry in the extrusion device are adjusted, so that the slurry is easier to extrude and form, and the formation of a hyperfine structure is realized; and a multi-axis moving platform is adopted, so that multi-angle complex structural parts can be easily formed. The extrusion device is used as a core, and high integration of the printing device is achieved. The printing efficiency is greatly improved, ultrahigh-precision and ultrahigh-height printing of a complex structure is achieved, and the problems of collapse caused by gravity factors and difficulty in forming a high-precision structural part are solved.

The invention relates to a decorative panel, in particular a floor, ceiling, building or wall panel, and a process and extrusion line for producing such decorative panel. The panel comprises at least one core layer and at least one decorative top layer, wherein at least one core layer comprises at least one structural core component and at least one balancing core component, wherein at least one structural core component comprises at least one mineral filler and at least one first polymeric composition and wherein at least one balancing core component comprises at least one second polymeric composition.

The invention relates to an intelligent control method and system for extrusion forming of an aluminum profile, and the method comprises the following steps: carrying out acoustic emission sensor array measurement and preprocessing on a mold inlet region of the aluminum profile in an extrusion process, and obtaining a preprocessed acoustic emission signal sequence; performing time-frequency domain energy distribution analysis on the acoustic emission spectrum to generate an acoustic emission energy spectrogram; carrying out material flow stability analysis based on the spectrogram to obtain a flow analysis result; if the flow instability degree exceeds the target stability range, multi-constraint optimization calculation is conducted on the main cylinder pressure and the extrusion speed based on the analysis result, and optimization control parameters are obtained; and finally, closed-loop feedback control is performed on the extruder through a distributed PID controller, so that the material flow stability is kept in a target range, intelligent high-precision forming control is realized, and the problem that in the traditional extrusion process, the material flow stability is often influenced by factors such as the extrusion speed, the main cylinder pressure and the mold design is solved. And a flow instability phenomenon is easy to occur.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The present invention relates to a machining die and machining method for a part with a flanged hole. The machining die comprises an upper die holder, a lower die holder, a female die, a blank holder, a material to be subjected to machining, a heating device and a machining device, wherein the heating device is used for heating said material; and the machining device comprises, from left to right in a first direction, a pre-extrusion assembly, a punching assembly, an extrusion assembly and a blanking assembly, the pre-extrusion assembly being used for enabling said material to form a boss, the punching assembly being used for punching said material that has formed the boss, the extrusion assembly being used for enabling said material to reach a preset size, and the blanking assembly being used for stamping and blanking said material that has reached the preset size. Since the entire machining process is completed on one machining die, the operation is convenient; and under the cooperation between the heating device and the machining device, a part with a flanged hole that has a required size can be obtained.

The invention discloses an energy-saving and environment-friendly building brick production device, which relates to the technical field of building brick production, and comprises an equipment unit, a production unit and a control unit, comprising an upper pressing die assembly arranged on a supporting piece and a forming assembly arranged at the bottom of the upper pressing die assembly and used for conducting extrusion forming on bricks. The upper pressing die assembly and the lower pressing die assembly are used for extruding the forming assembly, so that the forming assembly is moved to the bottom of the hopper for feeding, the utilization rate of raw materials is increased, and the problems of waste and residues caused by the fact that the raw materials cannot effectively enter a forming cavity are solved. And through accurate matching of the upper pressing die assembly and the lower pressing die assembly, materials in the forming assembly are evenly extruded into blocks, the quality and consistency of the bricks are ensured, meanwhile, the continuous feeding, stamping, forming and discharging processes are achieved through automatic design of the device, and the production efficiency is effectively improved.

The invention relates to the technical field of cable sheath materials, and provides a high-speed locomotive cable super-cold-resistant sheath material and a preparation method thereof, and the super-cold-resistant sheath material comprises the following raw material components by mass: 60-80 parts of a matrix polymer; 5 to 15 parts of a toughening agent; 3-10 parts of a cold-resistant auxiliary agent; 10 to 20 parts of a flame retardant; 1-5 parts of an antioxidant; 3-10 parts of a nano modified filler; and 1-5 parts of a cross-linking agent. The preparation method comprises the following steps: selecting the raw materials according to the proportion, putting the raw materials into mixing equipment, uniformly mixing to form a primary mixture, and preparing the primary mixture into the composite material through a melt blending process under specific temperature and shearing conditions. The obtained composite material is processed through an extrusion molding process to obtain a sheath material with excellent flexibility, impact resistance and aging resistance, and the problem that an existing material still has embrittlement, cracking or performance reduction in an extremely cold environment is solved.

The utility model provides a pottery clay 3D printing device capable of mixing and conveying raw materials in a fixed proportion, which comprises a rack, a 3D printing device, a 3D printing device and a 3D printing device, wherein the rack comprises an accommodating chamber and a printing chamber which are arranged in an up-down structure; the raw material conveying mechanism comprises a plurality of conveying assemblies arranged above the rack, and the conveying assemblies are used for conveying different raw materials; the mixing and extruding mechanism comprises an extruding assembly which can be transversely and movably arranged in the containing cavity and communicates with the conveying assembly, the extruding assembly comprises a material mixing bin body, a mixing cavity is formed in the material mixing bin body and communicates with the raw material conveying assembly, a stirring assembly is arranged in the mixing cavity, and an extruding head is connected to the lower portion of the material mixing bin body; the printing platform is arranged in the printing cavity in a longitudinal sliding mode and used for bearing 3D printing products, raw materials are directly printed in a printer after being mixed, efficiency can be greatly improved, and the problem that ceramic clay materials are possibly poor in uniformity and stability due to long-term placement or in the transferring process can be solved.

The invention relates to a plate edge sealing treatment device for plane design, which comprises a back plate, a guide assembly, a belt supply assembly and a shearing assembly. The front surface of the back plate is attached to the back surface of a plate, the guide assembly is attached to the front surface of the plate, and an n-shaped lap joint piece is in lap joint with the upper end of the plate; the device is pushed to move from one end of a plate to the other end of the plate, in the moving process, a glue solution stored in a glue solution storage box drips on a glue coating wheel through a glue supply pipe, the glue coating wheel rotates under the action of friction force, the upper end of the plate is evenly coated with the glue solution, the front end of an edge sealing belt is bent backwards under the blocking action of a baffle and the side edge of the plate, and the edge sealing belt is fixed. The edge sealing belt is pressed below the pressing roller, the edge sealing belt is pasted on a plate for edge sealing under the extrusion effect of the pressing roller, after edge sealing is completed, the edge sealing belt is cut off through the shearing assembly, deflection or bubbles cannot occur between the edge sealing belt and the plate, the attractiveness of a finished product is good, and the small-batch edge sealing requirement of a plane designer during home decoration design is met.

The utility model discloses a melt blending extrusion device which comprises a mixing tank and an extrusion assembly, and the extrusion assembly is arranged below the mixing tank; a stirring shaft is arranged in the mixing tank, the first stirring spiral blade is arranged on the stirring shaft, a plurality of rotating shafts are movably connected with the lower part of the stirring shaft in the mixing tank at equal angles, and second stirring spiral blades are arranged on the rotating shafts. In conclusion, the material mixing device overcomes the defects in the prior art, is reasonable in design, can push materials in the middle of the material mixing tank downwards and diffuse the materials outwards, avoids precipitation or layering of the materials in the mixing process, improves the mixing effect, and has high social use value and application prospects.

The invention discloses a multilayer co-extrusion heat-shrinkable film and a preparation method thereof, the film comprises an outer wear-resistant layer, a middle support layer and an inner functional layer, the thickness ratio of each layer is 1: 3: 1-1: 5: 1, the total thickness is 50-150 [mu] m, and the raw materials are prepared according to respective formulas. The preparation method comprises the steps of raw material preparation, melt mixing, die head extrusion, two-way stretching, water-cooling shaping, electronic crosslinking, aging treatment, heating softening and cold and hot shaping. The carbon nanotubes (CNT) and the h-BN nanosheets synergistically hinder crack propagation in the middle layer, so that the crack propagation resistance of the film is remarkably improved, the tensile strength, the thermal shrinkage rate and other properties are also optimized, compared with a traditional film, the comprehensive properties of wear resistance, high strength and high thermal shrinkage rate are achieved through interface collaborative design, meanwhile, the production cost is reduced by 20-30%, and the application prospect is wide. The method is suitable for food packaging, electronic device protection and other fields.

The invention discloses a high-strength modified high-density polyethylene double-wall corrugated pipe and a preparation method thereof, and relates to the technical field of high-density polyethylene double-wall corrugated pipes. The high-strength modified high-density polyethylene double-wall corrugated pipe is prepared from the following components: high-density polyethylene, ultra-high molecular weight polyethylene, reinforcing filler, a compatilizer, an antioxidant and a lubricant. The preparation method comprises the following steps: reinforcing filler surface modification; all the components are subjected to melt blending to prepare the modified composite material; the modified composite material is subjected to extrusion molding to form the double-wall corrugated pipe; and cooling, shaping and cutting. The UHMWPE and the reinforcing filler are introduced, and the compatilizer is combined to improve interface bonding, so that macromolecular chains of the UHMWPE are entangled to form a tough network, the reinforcing filler provides rigid support, and the high-temperature modulus and creep resistance are synergistically improved; high-temperature oxidative degradation is effectively inhibited through the antioxidant, the slow crack growth resistance time is prolonged, and the service life is prolonged.

A silicon carbide source material structure for use in a sublimation system for growing crystalline silicon carbide is provided. The silicon carbide source material structure includes a composite shaped solid. The composite shaped solid may be made by casting, extrusion, 3D printing, graphite conversion, or other suitable process.

The invention relates to the technical field of electric power conductive parts, in particular to a busbar using a conductive extrusion molding material as a shield, which comprises the following steps: S1, selecting a high-voltage insulating conductive material; s2, raw material pretreatment quality detection; s3, carrying out extrusion molding on the high-voltage insulating layer; s4, extruding and coating the conductive shielding layer; s5, carrying out secondary extrusion molding on the double-layer insulation structure; s6, processing the cutting edge of the busbar; s7, bending and forming the busbar; s8, peeling and punching the busbar; and S9, packaging and quality assurance testing. The 70% high-voltage insulating layer (crosslinked polyethylene) is used for providing the excellent dielectric strength of at least 35 kV / mm, electric shock and short circuit accidents are effectively prevented, safe operation of a power system is ensured, the 30% high-purity copper or aluminum alloy conductive shielding layer achieves the electromagnetic shielding effectiveness larger than or equal to 80 dB, electromagnetic interference (EMI) is remarkably inhibited, and the service life of the cable is prolonged. The influence of electromagnetic noise on surrounding equipment is reduced, and the stability and reliability of the system are improved.

The invention discloses an anti-blocking peek extruder, and belongs to the technical field of plastic processing, the anti-blocking peek extruder comprises an extrusion cylinder, a main shaft and a driving mechanism, the right side of the extrusion cylinder is provided with an extrusion nozzle, the left side of the extrusion cylinder is provided with a linkage mechanism, and the extrusion cylinder is internally provided with a centrifugal mechanism and an electromagnetic heating mechanism. Through the synergistic effect of the linkage mechanism and the driving mechanism, dynamic sensing and self-adaptive adjustment of resistance in the extrusion process are achieved, the technical problem that a high-viscosity PEEK material is prone to blockage is effectively solved, the driving mechanism transmits power through meshing of a limiting groove and a limiting strip, heating power is automatically triggered to be increased when the resistance is increased, and the heating efficiency is improved. The melt flowability is ensured; the electromagnetic heating mechanism generates eddy current heating through relative movement of a permanent magnet and a coil, and the heating effect during high-speed extrusion is remarkably improved; the homogenizing mechanism monitors the material compaction degree in real time through a pressure sensor, the feeding speed is intelligently adjusted, and hollowing or overpressure blockage is avoided.

The invention relates to the technical field of non-ferrous metal processing, and particularly provides a preparation method of a high-strength beryllium-containing Al-Mg-Zn-Cu series aluminum alloy profile. The preparation method of the high-strength beryllium-containing Al-Mg-Zn-Cu series aluminum alloy profile comprises the following steps that S1, after alloy raw materials are subjected to smelting treatment and refining treatment, an ingot blank is obtained through casting treatment or spray forming treatment; s2, the ingot blank is subjected to homogenization treatment and extrusion treatment, and an extruded profile is obtained; and S3, the extruded profile is subjected to solid solution quenching treatment and two-stage aging treatment, and the high-strength beryllium-containing Al-Mg-Zn-Cu series aluminum alloy profile is obtained. According to the invention, specific extrusion process parameters are adopted and a two-stage aging heat treatment system is combined, so that the preparation of the low-cost, low-density, high-strength and corrosion-resistant aluminum alloy profile is successfully realized.

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 discloses a PE pipeline hot melting fixing device and method, and particularly relates to the technical field of pipeline construction.The device comprises a fixed frame, a movable frame and a heater, the fixed frame and the movable frame are each provided with a fixing clamp used for fixing a PE pipe, and the heating faces of the two sides of the heater are each provided with a conical supporting and pressing assembly; the conical supporting and pressing assembly is used for extruding the edge of the inner wall of the port of the PE pipe when the port of the PE pipe is heated, so that a notch is formed in the edge of the inner wall of the port of the PE pipe, the hot melting fixing device further comprises an inner supporting cylinder, and the inner supporting cylinder is matched with the inner wall of the PE pipe. The conical supporting and pressing assembly is arranged, so that a notch is formed in the end opening of the PE pipe, the notch can be filled preferentially when follow-up pressing butt joint is carried out and inward extrusion deformation of materials is formed, forming of an inner flanging is avoided as much as possible, and then the problems of flow impact, vibration damage and the like caused by internal protrusions when follow-up pipelines are used are solved.

The invention particularly relates to an aluminum profile straightening machining method with an aluminum bar as a raw material, and relates to the technical field of aluminum profile machining. Extruding and forming; determining a straightening scheme; and precision detection. According to the method, a whole-process quality control system is constructed from raw material pretreatment to post-treatment storage; the straightening scheme depends on characteristic parameterization to accurately adjust pressure, match pressure maintaining and release stress in a targeted mode, and the problem of stress concentration of the special-shaped section is solved. Precision detection covers multi-dimensional form and location tolerances and defects, and data are fully traced, so that support is provided for quality closed-loop management and control; surface protection and storage are standardized through post-treatment, and performance degradation is prevented; the whole process is coordinated, the straightness, the stress uniformity and the size precision of the aluminum profile are greatly improved, and the requirements of the high-end field for high-quality profiles are met.