128 results about "Extrusion coating" patented technology

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

The invention discloses an ultra-flexible cable for a high-voltage charging pile and a preparation method of the ultra-flexible cable, and aims to solve the problems that an existing cable for the high-voltage charging pile is insufficient in flexibility, short in bending-resistant service life and poor in signal stability under high voltage. The cable comprises a conductor, an insulating layer, a shielding layer, a signal line group and a sheath layer, the conductor is made of superfine oxygen-free copper wires through layered different-direction back-twist bunch stranding and compound stranding, and a flexible aramid fiber core is arranged in the center of the conductor. The insulating layer is of a TPU / TPE double-layer co-extrusion structure; the shielding layer adopts a composite structure of a semi-conductive elastomer extruded layer and a superfine silver-plated copper wire braid layer; the signal line groups are symmetrically arranged in a star shape; and the sheath layer is made of a nano modified TPEE material. The preparation method focuses on optimization of conductor stranding, double-layer co-extrusion, annealing treatment and tension control processes; the bending radius of the cable is less than or equal to 3D, the bending service life is long, the cable can bear 1000VDC high voltage and large current transmission, and the cable has excellent shielding effectiveness, wear resistance and weather resistance, and is suitable for high-frequency mobile scenes such as electric vehicle alternating current and direct current charging guns.

The application discloses a cable extruder with waste material sorting structure, which comprises a guide frame, an extrusion coating die arranged on one side of the guide frame, an extrusion feeding mechanism arranged above the guide frame and used for feeding coating cable core raw materials to the extrusion coating die, a traction machine arranged on the one side of the guide frame and used for guiding cable feeding, a visual detection system arranged on the side of the traction machine away from the guide frame and used for detecting cable quality, a material sorting tank arranged on the side of the traction machine away from the guide frame, the material sorting tank comprising a waste tank and a finished product tank, a water tank arranged between the guide frame and the traction machine, and a linear module, the water tank being movably arranged above the material sorting tank through the linear module, and a cutting mechanism arranged on the side of the water tank away from the traction machine and used for cutting the cable.

The invention provides a slit extrusion coating head and a method for preparing an HIPE (High Impact Polyethylene) foam material by using the same, the slit extrusion coating head comprises an upper die lip and a lower die lip, the upper die lip and the lower die lip are arranged in parallel and form an extrusion slit, and the roughness of the upper die lip and the roughness of the lower die lip are different. The slit extrusion coating head provided by the invention can be used for preparing the HIPE foam material with the gradient aperture through single-time extrusion, multi-layer compounding is not needed, the process is simple, and the cost is greatly reduced; the HIPE foam material with gradient aperture prepared by using the slit extrusion coating head provided by the invention can avoid the problem of interlayer separation existing in a multi-layer composite process.

The utility model discloses a slit extrusion die head mechanism, and mainly relates to the technical field of extrusion coating. Comprising a die head body, positioning carrier rollers and guide carrier rollers, an extrusion slit is formed in one side of the die head body, the positioning carrier rollers are arranged in parallel relative to the extrusion slit, positioning plates are arranged at the two ends of each positioning carrier roller respectively, adjusting seats are fixed to the sides, away from the die head body, of the positioning plates, and the sides, away from the die head body, of the adjusting seats are mounting surfaces. The die head comprises a die head body, a mounting face is arranged on the die head body, the mounting face is an inclined face inclining in the direction away from the die head body from bottom to top, an inserting groove extending in the length direction of the mounting face is formed in the mounting face, a sliding block sliding in the inserting groove and capable of being locked is arranged in the inserting groove, a moving block is fixed to the outer end of the sliding block, and shaft seats are arranged at the two ends of the guide carrier roller. And the shaft seat is fixed at the outer end of the moving block. The device has the beneficial effects that the tension and the running direction of a base material after coating can be better controlled, so that the coating stability is ensured.

Lignin pellets comprising fused lignin are described herein. The lignin pellets may further comprise a processing aid, and / or a surfactant, and / or a chemical modifying agent, and / or a compatibilizer and / or a thermoplastic polymer. An extrusion process for producing the lignin pellets and their use in the manufacture of lignin thermoplastic blend products, polyols, polyphenols, polyaromatics and polyurethanes is also disclosed herein. The extruded lignin pellet may be dry-blended with additional thermoplastic and / or additive and then directly processed using processes such as injection molding, compression molding, extrusion, extrusion coating, blowing, thermoforming, stamping, foaming, fiber drawing, calendering or rolling.

The forms described herein include polymer blends comprising at least 90% by weight of low-density polyethylene (LDPE) polymer; and from 1% to 10% by weight of ethylene acrylate copolymer. The ethylene acrylate copolymer is the polymerized reaction product of: at least 50% by weight of ethylene, based on the total weight of monomers present in the ethylene acrylate copolymer; from 2% to 40% by weight of alkyl acrylate, based on the total weight of monomers present in the ethylene acrylate copolymer; and from 0% to 20% by weight of monocarboxylic acid monomer, based on the total weight of monomers present in the ethylene acrylate copolymer.

The invention relates to thermoplastic molding compositions based on semi-aromatic polyesters, which are particularly suitable for extrusion coating processes, in particular on paper substrates. The invention also relates to molded articles and films comprising the thermoplastic molding, in particular to coated articles. In another aspect, the invention relates to methods for producing thermoplastic molding compositions and to extrusion methods using these thermoplastic molding compositions. The invention also relates to a packaging material comprising a coated article coated with a thermoplastic molding composition according to the invention.

The utility model relates to the technical field of pit and fissure sealing agent smearing, and particularly discloses a pit and fissure sealing agent extrusion coating device which comprises a main body, the main body is arranged to be a hollow cylindrical shell, and friction blocks are continuously arranged on the surface of the main body; a sliding rod is embedded in one side of the surface of the body, one side of the sliding rod is inserted into the body and connected with a rubber block, and one side of the sliding rod is connected with a connecting block. According to the extrusion coating device for the pit and ditch sealing agent, the plugging block and the connecting rope are arranged, the plugging block is pulled outwards so that the plugging block can be taken out from the interior of the feeding port, at the moment, the pit and ditch sealing agent can be added according to the discharging port, feeding of the pit and ditch sealing agent is facilitated, and the use convenience of the device is improved; when the friction block extrudes the pit and groove sealing agent, the pit and groove sealing agent flows to the outlet pipe more smoothly, residues of the sealing agent in the main body are reduced, the utilization rate of the sealing agent is increased, and waste is avoided.

The invention discloses a self-repairing anti-twisting shielding composite cable, and relates to the technical field of cables, the self-repairing anti-twisting shielding composite cable comprises a conductor, an insulating layer, a shielding layer and an outer sheath which are sequentially sleeved from inside to outside, and the insulating layer and / or the outer sheath are / is obtained by extruding a self-repairing polyurethane elastomer; the self-repairing polyurethane elastomer is prepared from the following components in parts by weight: 100 parts of soft-segment polyol, 40 to 80 parts of isophorone diisocyanate, 12 to 20 parts of a chain extender containing disulfide bonds and 5 to 12 parts of a chain extender containing ureido, and the soft-segment polyol is selected from at least one of polytetrahydrofuran ether glycol and amino-terminated polydimethylsiloxane. The self-repairing anti-twisting shielding composite cable is high in self-repairing capacity, excellent in anti-twisting performance and stable in shielding performance.

The application discloses a cross-linking vulcanization process for new energy cable production and relates to the technical field of new energy cable production.The process comprises the preparation and pretreatment of raw materials, the extrusion coating of a conductor to form an insulation layer, the cutting of the cable, a hot vulcanization reaction, cooling and shaping, post-treatment and detection; the process is good in sealing, so that gaseous by-products generated during the cross-linking of peroxides cannot escape, the cross-linking is relatively uniform, and proper pressure ensures that the insulation layer is in close contact with the mold, so that the cross-linking degree is consistent, the conductor of the cable is not damaged, the sealing state in the placement hole can be switched, or the cable is fixed in a fixed sleeve, the ends of two cable sections are fixed in the fixed sleeve, the cable head and the cable tail are fixed by the fixed sleeve, the cable is prevented from being deformed during the process, the insulation skin of the cable in the placement hole is ensured, and efficient and stable cross-linking reaction of the new energy cable can be realized.

This utility model relates to the field of electric wire and cable production technology, and in particular to an extrusion coating device for electric wire and cable. This device allows the electric wire and cable to be coated with different materials sequentially during its movement, thereby forming a multi-layer composite structure in a single processing cycle, effectively improving production efficiency and the bonding strength of the coating layers. The extrusion mold is equipped with a thickness control component, including horizontally movable left and right adjustable die lips, which can precisely adjust the size of the discharge hole, ensuring the uniformity and adjustability of the coating thickness to meet the processing needs of electric wire and cable of different specifications. Furthermore, the design of the conical injection channel and stepped transition surface optimizes the flow distribution of the molten material, reducing turbulence and bubble generation, and improving the coating quality. The combined use of the guide sleeve and positioning component accurately guides the electric wire and cable into the extrusion cavity, preventing deviation and ensuring the symmetry and consistency of the coating layers. The overall structure is compact, easy to operate, suitable for continuous production, and has high practicality and economy.

The utility model provides a high mechanical strength insulation radio frequency coaxial cable, including inner conductor, insulating layer, shielding layer, inner sheath layer, composite armor layer and oversheath layer, the insulating layer is provided outside the inner conductor, the shielding layer wraps the insulating layer, the inner sheath layer is extruded outside the shielding layer, the composite armor layer is provided outside the inner sheath layer, and the outer sheath layer is provided with the outer sheath layer. An outer sheath layer is extruded and formed outside the composite armor layer; the composite armor layer is additionally arranged, so that the mechanical strength of the cable is greatly improved. And the composite armor layer is formed by spirally wound composite armor wires, so that the tensile resistance, the distortion resistance and the external impact resistance are enhanced. The armored wire is combined with the heat capacity layer and the metal wire harness, and the metal wire harness is formed by twisting metal wires with the same diameter, so that the strength and the stability are ensured. And the heat capacity layer is extruded outside the metal wire harness, so that the binding force is enhanced, a tight whole is formed after heating, and the performance is further improved. The cross section of the heat capacity layer is designed to be circular, spiral grooves are naturally formed, cable bending and twisting are facilitated, and flexibility is improved.

The utility model discloses a steel-plastic conversion pipe fitting manufactured by extruding and coating a 3PE anti-corrosion steel pipe, which comprises a 3PE anti-corrosion steel pipe fitting and a PE plastic part, the outer wall of the 3PE anti-corrosion steel pipe fitting is provided with a plurality of conical inverted tooth structures, and the inner wall of the PE plastic part is embedded into the conical inverted tooth structures. The 3PE anti-corrosion steel pipe fitting is arranged on the outer surface of the seamless steel pipe body, a plastic-coated locking ring is arranged at the joint of the PE anti-corrosion steel pipe fitting and the 3PE anti-corrosion steel pipe fitting in a sleeved mode to form a steel-plastic conversion pipe fitting, the plastic-coated locking ring comprises a steel locking ring, and a polypropylene coating layer is arranged on the outer portion of the steel locking ring, and the 3PE anti-corrosion layer is arranged on the outer surface of the seamless steel pipe body, so that the 3PE anti-corrosion steel pipe is stable in anti-corrosion performance. And the plastic-coated locking ring is provided with the polypropylene coating layer, so that the plastic-coated locking ring has good corrosion resistance, the corrosion resistance of the steel-plastic conversion pipe fitting is excellent, and the corrosion speed of a pipeline is slowed down.

The invention relates to the technical field of electrolyte membrane preparation, in particular to extrusion flat plate coating equipment for preparing a solid electrolyte membrane and a preparation method.The extrusion flat plate coating equipment comprises an equipment body, and the equipment body is provided with a slurry supply unit, an extrusion coating unit, a thickness measurement control system, a multi-stage drying unit and a stripping and rolling unit; the slurry supply unit is arranged on one side of the extrusion coating unit, a screw pump of the slurry supply unit is communicated with a coating die head of the extrusion coating unit, the multi-stage drying unit is arranged on the discharging side of the extrusion coating unit, and a thickness measuring probe of the thickness measuring control system is arranged in the multi-stage drying unit. The stripping and winding unit is arranged on the discharging side of the multi-stage drying unit. Continuous, efficient and stable production of the solid electrolyte membrane can be achieved, and the prepared membrane is uniform in thickness, free of defects, high in density and excellent in mechanical performance.

This utility model relates to the field of coating machine gasket technology, specifically to an extrusion coating gasket, which includes a gasket base, side strips, and adhesive pads. A mounting groove is formed in the middle of the front end of the gasket. Mounting blocks are fixedly connected to both sides of the mounting groove. Side strips are slidably mounted on the mounting blocks, with the front end face of the side strips flush with the front end face of the gasket base. Two adhesive pads are provided, each corresponding to one of the two side strips. The adhesive pads are located between the side strips and the gasket, and behind the side strips. During use, this utility model allows adjustment of the distance between the two side strips in the left-right direction according to actual production needs, thereby changing the coating width. This solves the problem in the prior art where the coating machine needs to be disassembled and the gasket replaced when the coating width changes. By detachably installing spacers in the mounting groove, two electrode sheets can be coated simultaneously on the foil, and the coating width of the two electrode sheets can be equal or unequal.

The utility model belongs to the technical field of pole piece processing, and discloses a die head gasket, a die head and an extrusion coating machine. The die head gasket comprises a gasket body, a flow adjusting module and an opening adjusting module. The gasket body is provided with a discharging opening, and slurry in a die head can flow out of the discharging opening to a die head nozzle. The flow adjusting module is detachably connected to the gasket body and can partially block the slurry from flowing into the inlet of the gasket body so as to adjust the flowing state of the slurry in the gasket body. The opening adjusting module is movably connected to the gasket body and can partially extend out of the discharging opening so as to adjust the opening width of the discharging opening. According to the die head gasket, the flowing uniformity of slurry can be effectively adjusted, all parts can be conveniently detached and replaced so as to meet diversified coating requirements, the flexibility and the operation convenience are improved, and the production cost is reduced.

The utility model discloses an extrusion coating die head. The extrusion coating die head comprises an extrusion coating die head body, an adjusting assembly and a connecting assembly, the extrusion coating die head body comprises an upper die body and a lower die body; the lower die body is connected with the upper die body through a gasket, and a die cavity is formed between the upper die body and the lower die body; the adjusting assembly is arranged on the lower die body; the adjusting assembly comprises a connecting plate, a scraping plate, a fixed seat and an adjusting screw rod; the two connecting plates are symmetrically arranged on the two sides of the lower die body in a sliding mode. The scraping plate is arranged between the two connecting plates and is fixedly connected with the opposite surfaces of the two connecting plates; the fixing base is connected with the lower die body through a connecting assembly. The adjusting screw rod is arranged on the fixed seat in a penetrating manner, and the adjusting screw rod is rotationally connected with one of the connecting plates through a rotating shaft; the extrusion coating die head is simple and reasonable in structure, ingenious in design, capable of rapidly and conveniently adjusting the thickness of a coating material and high in practicability.

This invention discloses a gel-like flange protection and monitoring material, its preparation method, and its application, belonging to the field of industrial flange protection and leakage monitoring technology. The material is a toothpaste-like extrudable colloid, comprising, by weight: 75-88 parts of protective matrix adhesive, 3-12 parts of pH-responsive core-shell microcapsules, 1-3 parts of interface compatibilizer, 2-5 parts of toughening modifier, 0.5-2 parts of anti-aging additive, 1-4 parts of thixotropic modifier, and 0.5-2 parts of anti-corrosion additive. The pH-responsive microcapsules use a compound of methyl red, bromocresol green, and thymol blue as the core material, with a particle size of 20-50 μm and a shell thickness of 2-3 μm. This invention replaces traditional flange covers with an extrusion coating method, eliminating the need for bolt fixing. It is suitable for flanges of various sizes, providing physical protection against impacts, dust, and media splashes. Simultaneously, it rapidly develops color when acidic or alkaline media leak, enabling naked-eye visual monitoring of the leakage location. It is convenient to construct and simple to maintain, and is suitable for flange protection in industries such as chemical, petroleum, water, and energy.

Recyclable, paper-based packaging structures and articles comprise extensible or semi-extensible paper layer with an anisotropy ratio in the range of 0.67 to 1.5 and a polymer extrusion coating layer. Methods for forming same are also provided. The structures and articles have a puncture resistance of 3 lbf or greater. Recyclable, paper-based packaging structures and articles and methods are formed using a polymer extrusion coating layer disposed on one side of an extensible or semi-extensible paper layer having an anisotropy ratio in the range of 0.67 to 1.5. A second polymer extrusion coating layer is disposed on a second side of the paper substrate layer. Advantageously, the paper substrates have a puncture resistance in the range of 3 lbf to 13.5 lbf.

An aluminum strip coating machine capable of automatically adjusting the coating range and position, comprising a pair of extrusion coating rollers and guide rollers, a detection mechanism above the guide rollers for detecting the width and position of the aluminum strip, two nozzle supports above the extrusion coating rollers and longitudinally distributed along the extrusion coating rollers, a plurality of coating nozzles on each nozzle support and spaced along the length of the nozzle support, the position between the two outermost coating nozzles on the two nozzle supports forming the coating spraying range, the two nozzle supports being able to be linked with the detection mechanism and being able to adjust the position of the two nozzle supports along the longitudinal direction of the extrusion coating rollers and the staggered amplitude between the two nozzle supports according to the width and position of the aluminum strip detected by the detection mechanism, so that the width and position of the coating spraying range are consistent with the aluminum strip. The present application can improve the color difference problem of aluminum strip printing and dyeing, and automatically adjust the coating spraying range, so that the coating spraying range is self-adaptive to the width and position of the feeding aluminum strip.

The present invention relates to paper or paperboard comprising cellulose fibers, said paper or paperboard comprising at least one coating layer formed by extrusion coating of a PP (polypropylene) resin, characterized in that the PP resin comprises at least 50% by weight of a branched PP copolymer having a density in the range of 890-910 kg / m3 (as determined according to ISO 1183), a melting temperature in the range of 155-170° C. (as determined according to ISO 11357-3), and a melt flow rate (230° C. / 2.16 kg) in the range of 10-15 g / 10 min (as determined according to ISO 1133), and wherein the PP resin is applied to the paper or paperboard at a grammage of less than 30 g / m2.

The invention relates to the technical field of battery manufacturing, in particular to a preparation method of a solid electrolyte membrane, and the method comprises the following steps: mixing a binder, a solvent and a solid electrolyte to obtain slurry, carrying out vibration treatment on the slurry to obtain a solid electrolyte membrane to be dried, and promoting the dispersion of the solid electrolyte in the slurry through vibration treatment to obtain the solid electrolyte membrane to be dried. The settling velocity of the slurry in the longitudinal direction can be controlled, so that components in the slurry are uniformly distributed in the transverse direction and the longitudinal direction, and then the to-be-dried solid-state electrolyte membrane is dried to obtain the solid-state electrolyte membrane; the preparation method disclosed by the invention is simple and low in cost, effectively avoids common defects of cracks, foreign matters, scratches, foil exposure and the like caused by scraper or extrusion coating, and improves the high ionic conductivity of the electrolyte membrane and the rate capability of the battery.

The application discloses a plastic composite sheet and a preparation method thereof. The sheet comprises an aluminum foil layer and transition layers arranged on the upper and lower sides of the aluminum foil layer through film coating, and outer surface layers and inner surface layers are arranged on the outer sides of the transition layers. The thickness of the aluminum foil layer is 40-50 microns, accounting for 15-20% of the total thickness of the sheet. The specific mechanical properties and thickness ratio jointly provide the rigid support and overall flexibility required for anti-rebound. The transition layer contains ethylene-vinyl acetate copolymer, maleic anhydride grafted polyethylene and optional reactive interface synergist, which enhances the interfacial bonding strength of the aluminum foil and the polymer layer. The outer surface layer and the inner surface layer adopt a polyethylene blending system with different melt indexes, and an esterification product containing a dynamic disulfide bond can be added to assist energy dissipation. The sheet has a rebound rate of less than or equal to 3% in a simulated pressing test, the interlayer bonding is firm, and the preparation method through stepwise co-extrusion coating is easy to process.

The application provides a double-coating lithium iron phosphate positive electrode sheet, a preparation method and application thereof. The preparation method comprises the following steps: mixing modified large-particle lithium iron phosphate, modified small-particle lithium iron phosphate, a conductive agent, a binder and a solvent to obtain a first slurry and a second slurry; adopting double-layer slot extrusion coating to coat the first slurry on the surface of a current collector and coat the second slurry on the surface of the first slurry; and drying and rolling to obtain the double-coating lithium iron phosphate positive electrode sheet; the modified large-particle lithium iron phosphate is doped with Ti and Nb, and the modified small-particle lithium iron phosphate is doped with Mg and Al. The application adopts a multi-element doped positive electrode material combined with a double-layer coating preparation method to avoid the shortcomings of LFP materials, improve the rate performance, high-temperature performance and cycle performance of LFP, and has the advantages of simple preparation process and easy industrial production. The prepared positive electrode material and the secondary battery using the same have excellent comprehensive performance, and have a wide application prospect in the field of power batteries.

A web processing machine (10) for producing a multilayer web (12), in particular a multilayer packaging web (13), is presented. It comprises a first vacuum coating unit (28) for depositing a film of a first coating material on a web (16) to be processed. Furthermore, it is equipped with an extrusion coating unit (32) for pressing a film of an extrusion material on the web (16). The extrusion coating unit (32) is positioned behind the first vacuum coating unit (28) with respect to the processing direction (20). Furthermore, a method for producing a multilayer web (12) is set forth. Furthermore, a multilayer packaging web (13) is described.

The application provides a lithium battery gravure extrusion high-speed coating integrated machine, and belongs to the technical field of lithium battery manufacturing. The lithium battery foil material sequentially passes through a unwinding system, a gravure double-sided coating system, an extrusion coating system and a winding system to complete coating. Through the design of folding three layers in the extrusion oven, the drying path length is significantly increased in the limited space, and the coating speed is improved. The first drying layer double-sided offset air nozzle forms convection + outer eight / inner eight air nozzle cooperation, reduces single-sided heating warping, and solves the problems that the coating is prone to wrinkling and cracking. After the lithium battery foil material passes through the first drying layer, the lithium battery foil material enters a first drying oven conversion mechanism. The first drying oven conversion mechanism adopts an adsorption roller to contact a drying surface. The second drying oven conversion mechanism adopts an air floatation roller to suspend a wet surface. Such a combined design compensates for the mechanical support of the passing roller and avoids the risk of coating damage caused by the wet film sticking to the passing roller.

The application discloses a sustained-release transdermal patch and a preparation process thereof, and particularly relates to the technical field of pharmaceutical preparations. The patch is a five-layer composite structure, and the key lies in that: the adhesive layer and the drug depot layer both contain ion pairs of clonidine and organic acid formed in situ under specific solvent and temperature conditions, and the formation of the ion pairs is confirmed by pH value or infrared spectrum; and specific transdermal penetration enhancers are further compounded, so that programmed controlled release is realized through the cooperation of the two layers. The preparation process adopts the sequence of forming ion pairs first and then mixing, realizes coating precision of ±2μm through slit extrusion coating combined with online thickness measurement closed-loop control, adopts gradient drying process with clear temperature zone, air speed and humidity parameters, and carries out real-time quality control based on the online near-infrared spectrum detection of the pre-established PLS regression model. The process can ensure that the patch realizes near-zero-order constant-speed release within 168h, and has the advantages of stable drug release, uniform content, stable quality and high batch consistency.

The invention relates to the field of 3D printing metal powder / polymer composite wire material forming, in particular to a metal powder composite material extrusion coating mechanical device which comprises an extrusion system, an extrusion system, a film coating system, a film coating system, a film coating system, a film coating system, a film coating system and a film coating system, and the extrusion system comprises an upper extrusion machine body, a lower extrusion machine body, an extrusion opening mold, a screw and a screw supporting plate; the coating system comprises an upper coating machine head, a lower coating machine head, a middle guide sleeve, a choke ring, an inner mouth mold, a mouth mold fixing plate, a distance-adjustable coating plastic part, a locking hose clamp and an adjusting screw; a composite material enters the extrusion system from the feed port and is extruded into filaments from the extrusion port die under the driving of the screw, the composite filaments after filament forming enter the film coating system, at the moment, the upper cavity part in the film coating machine is filled with the molten polymer material, and after the composite filaments make contact with the molten polymer material, the composite filaments are extruded into filaments from the extrusion port die. And co-extruding under the coating action of the coating plastic part to finish the integrated process of extruding and coating.