CN111805920A - Omnibearing conductive polyurethane foam and preparation method thereof - Google Patents
Omnibearing conductive polyurethane foam and preparation method thereof Download PDFInfo
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- CN111805920A CN111805920A CN202010619814.9A CN202010619814A CN111805920A CN 111805920 A CN111805920 A CN 111805920A CN 202010619814 A CN202010619814 A CN 202010619814A CN 111805920 A CN111805920 A CN 111805920A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
- B29C65/522—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by spraying, e.g. by flame spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0278—Arrangement or mounting of spray heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
- B29C66/7314—Electrical and dielectric properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
- B65H18/10—Mechanisms in which power is applied to web-roll spindle
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses an omnibearing conductive polyurethane foam and a preparation method thereof, and the specific method comprises the following steps: firstly, preparing foam, namely cutting foam sponge with polyurethane as a main component into sheets; step two, preparing conductive cloth, namely placing the polyurethane fiber grid cloth in a vacuum chamber, and plating a copper layer on the grid cloth through multi-arc ion plating to form the conductive cloth; step three, cleaning foam; and step four, spraying glue and pasting cloth on the foam, and spraying liquid glue and pasting conductive cloth on the cut foam by using a glue spraying and pasting device. The polyurethane foam has the characteristics of strong conductivity, high flexibility, high extrudability, good shielding effect and the like, and has extremely high cost performance; the cloth rolling mechanism of the glue spraying and cloth pasting device can be disassembled, the replaceability of the conductive cloth is ensured, the device is convenient for mass production of all-dimensional conductive polyurethane cotton with different sizes, and the device has the advantages of convenience in operation, firmness in bonding of the conductive cloth, time saving, labor saving and the like.
Description
Technical Field
The invention belongs to the field of conductive foam, and particularly relates to omnibearing conductive polyurethane foam and a preparation method thereof.
Background
The conductive foam is a three-dimensional net-shaped functional material integrating the functions of electric conduction and electromagnetic shielding, and is widely applied to the field of conductive materials due to the characteristics of long conductive effective period, good electric shielding effect, surface resistance value which can be set according to actual application and the like. At present, the conductive sponge produced by adopting the preparation methods of chemical plating vacuum plating, ion sputtering, vapor deposition, conductive adhesive coating and the like also has the defects of easy shedding of a coating, poor plating permeability, unstable surface resistance caused by uneven coating, poor fireproof and moisture-proof properties, brittleness, easy powder falling, poor rebound resilience, short service life and the like, and is difficult to adapt to the requirements of modern electronic products on quality.
The conductive foam is prepared by wrapping a sponge with a conductive cloth, performing a series of treatments to make the conductive cloth have good surface conductivity, and can be easily fixed on a device to be shielded by an adhesive tape, and has the advantages of different section shapes, installation methods, UL grades and shielding materials with shielding effects. The foam cotton needs to be sprayed and pasted when the conductive foam cotton is produced, the existing glue spraying and pasting device is low in applicability, the production speed of the conductive foam cotton is reduced, and at the present time of rapid development of electronic technology, the conductive foam cotton has good conductivity, a plating layer is not easy to fall off, and the requirement of an ultrathin electromagnetic shielding material can be met, so that the inevitable requirement of conductive sponge development is met.
Disclosure of Invention
The invention aims to provide an all-dimensional conductive polyurethane foam and a preparation method thereof.
The technical problems to be solved by the invention are as follows:
in the prior art, the foam inner core material used by the conductive foam has general performance, does not have excellent elasticity and flexibility, has poor bonding performance, is not high temperature resistant and aging resistant, and the plating layer on the conductive cloth is easy to fall off, has poor conductive effect, and the production equipment used in the production process has complicated operation steps, wastes time and labor.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of omnibearing conductive polyurethane foam comprises the following steps:
firstly, preparing foam, namely cutting foamed sponge taking polyurethane as a main component into sheets, wherein the thickness of the foam is 1-10 mm;
step two, preparing conductive cloth, namely firstly installing a target material corresponding to a plating layer in a plating area in a vacuum chamber, wherein the target material is a copper rod, and placing the polyurethane fiber lattice cloth in the vacuum chamber; secondly, vacuumizing the vacuum chamber to a background vacuum degree, filling inert gas, and controlling and maintaining the pressure in the vacuum chamber at a preset pressure; further conveying the polyurethane fiber grid cloth to pass through a plating area, starting a multi-arc power supply, and plating a copper layer on the grid cloth through multi-arc ion plating to form conductive cloth; finally, a nickel-plated layer target is arranged in a plating area in the vacuum chamber, so that the outer layer of the conductive cloth is coated with a nickel protective layer;
step three, cleaning the foam, and removing dust and impurities on the foam;
and step four, spraying adhesive and pasting the cloth on the foam, and spraying hot melt adhesive and pasting the conductive cloth on the cut foam by using an adhesive and pasting device to enable the foam to have an all-dimensional conductive function.
The glue spraying and cloth sticking device comprises an operation table, wherein supporting legs are fixedly connected at four corners of the lower surface of the operation table, mounting tables are symmetrically arranged at the front end and the rear end of the upper surface of the operation table, the mounting tables are welded on two sides of the upper surface of the operation table, the mounting tables are 5cm in height, a smooth plastic pad covers an area between the two mounting tables, and polyurethane cotton can slide on the upper surface of the plastic pad under the action of external force;
the mounting table is characterized in that the glue spraying mechanisms are symmetrically mounted at the front end of the mounting table, the cloth rolling mechanism is mounted at the rear end of the mounting table, the transition mechanism is arranged at one end, away from the glue spraying mechanism, of the mounting table, and the winding mechanisms are fixedly arranged on the two supporting legs, away from the glue spraying mechanism.
The glue spraying mechanism is symmetrically distributed on the two mounting tables, the glue spraying mechanism comprises a glue conveying pipe, one end of the glue conveying pipe is connected with a driving mechanism, the other end of the glue conveying pipe is connected with a glue spraying head, the glue spraying head comprises a storage cylinder and a heating cylinder, the storage cylinder is communicated with the glue conveying pipe, the heating cylinder is positioned on the outer side of the storage cylinder and used for heating liquid glue conveyed by the glue conveying pipe, the liquid glue is prevented from being solidified due to large temperature difference, long time and the like, the glue spraying head is blocked, the heating cylinder is a hollow cylindrical cylinder, three glue spraying plates are fixedly connected to the outer side cylinder wall of the heating cylinder, one end of each glue spraying plate penetrates through the heating cylinder and the cylinder wall of the storage cylinder and extends into the storage cylinder, the glue spraying plates are positioned on the same plane, the included angle between every two glue spraying plates is 120 degrees, heating blocks are mounted at the upper end and the lower end of each glue feeding, shunt tubes one side is equipped with a plurality of trompils, and the welding has the glue spraying pipe in the trompil, and the glue spraying pipe communicates with each other with the shunt tubes, and has seted up a plurality of glue spraying holes on the surface of one side of every glue spraying pipe, and through setting up glue spraying head on spouting mucilage binding putting, has reached and has spouted gluey quick, even and the wide effect of covering, and the heating block distributes respectively in the upper and lower both ends of advancing the rubber tube, makes liquid glue can not influence because of the cooling and spouts gluey effect in transportation process.
The cloth rolling mechanism comprises two supporting blocks fixedly arranged on the upper surface of the mounting table, the supporting blocks are rectangular cylinders, the lower ends of the supporting blocks are welded on the upper surface of the mounting table and are vertically placed, arc-shaped grooves are formed in the upper end surfaces of the supporting blocks, a first supporting cylinder and a second supporting cylinder are installed in the arc-shaped grooves, the first supporting cylinder and the second supporting cylinder are the same in size, the second supporting cylinder comprises a first limiting ring and a second limiting ring, the diameters of the first limiting ring and the second limiting ring are larger than that of a cylinder cavity in the second supporting cylinder, the cylinder cavity is matched with the arc-shaped grooves in the upper end of the supporting blocks in size, the second supporting cylinder can be taken out from the arc-shaped grooves in the upper end of the supporting blocks, and; the support rod is fixedly arranged in the second support cylinder, the conductive cloth roller is sleeved in the middle of the support rod and can rotate on the support rod, cloth blocking discs are fixedly arranged at the front end and the rear end of the conductive cloth roller, the diameter of each cloth blocking disc is larger than that of the conductive cloth roller, a limiting block is arranged on one side, away from the conductive cloth roller, of each cloth blocking disc, the limiting block is in threaded connection with the support rod, and the limiting block is used for fixing the conductive cloth roller to slide along the support rod when the conductive cloth roller rotates, so that the accuracy of a subsequent cloth sticking process is guaranteed;
the transition mechanism is positioned on the left side of the operating platform and comprises two first L-shaped connecting rods, one end of each first L-shaped connecting rod is welded on the upper surface of the operating platform, the other end of each first L-shaped connecting rod is fixedly connected with a first sliding rod, two ends of each first sliding rod are fixedly connected with the corresponding first L-shaped connecting rods, a transition roller is sleeved on each first sliding rod and can rotate on the corresponding first sliding rod, two ends of each transition roller are fixedly provided with first limiting parts, so that the transition rollers cannot move along the corresponding first sliding rods in the rotating process, and the arrangement of the transition mechanism facilitates the subsequent winding work of polyurethane cotton after glue spraying and cloth pasting;
the winding mechanism is positioned at the lower left of the transition mechanism and comprises two second L-shaped connecting rods, one ends of the second L-shaped connecting rods are fixedly connected to one side surfaces of two supporting legs at the left of the lower end of the operating platform, the other ends of the second L-shaped connecting rods are fixedly connected with second sliding rods, winding drums are sleeved on the second sliding rods, driving motors are connected to the outer portions of the winding drums, and second limiting parts are arranged at two ends of the winding drums; the second limiting part is arranged to prevent the winding drum from moving along the second sliding rod in the rotating process, so that the winding effect is guaranteed.
The central shafts of the conductive cloth roller, the transition roller and the winding roller are in the same vertical plane and are parallel and aligned.
The invention discloses an all-directional conductive polyurethane foam which is prepared by the preparation method.
The working principle of the glue spraying and cloth sticking device is as follows:
polyurethane foam is flatly laid on a plastic pad, one end of the polyurethane foam is pulled to enable the polyurethane foam to penetrate through the upper surface of a transition mechanism to be fixed on the surface of a winding drum of a winding mechanism, the winding drum rotates under the driving action of a driving motor, the winding drum in rotation drives the polyurethane foam to move, the upper surface of the polyurethane foam in the moving process is subjected to glue spraying treatment through a glue spraying mechanism, then conductive cloth on a cloth winding mechanism is pasted on the upper surface of the polyurethane foam, the conductive cloth drum is driven to rotate along with the rotation of the winding drum, and the process of pasting and covering the conductive cloth on the upper surface of the polyurethane foam is realized.
The invention has the beneficial effects that:
the polyurethane foam as a raw material has excellent elasticity and flexibility, good bonding performance, high temperature resistance and aging resistance, and can ensure good conduction contact area; the polyurethane fiber lattice cloth has the advantages of high resilience, high deformation resistance, high heat resistance, high acid resistance and the like, has a conductive function after being electroplated with metal, and is wrapped on the polyurethane cotton to form the all-dimensional conductive polyurethane cotton; the cloth rolling mechanism of the glue spraying and cloth pasting device can be disassembled, the replaceability of the conductive cloth is ensured, the device is convenient for mass production of all-dimensional conductive polyurethane cotton with different sizes, and the device has the advantages of convenience in operation, firmness in bonding of the conductive cloth, time saving, labor saving and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a device for spraying adhesive and pasting cloth according to the present invention;
FIG. 2 is a schematic structural view of a cloth winding mechanism;
FIG. 3 is a schematic structural view of a glue spraying mechanism;
FIG. 4 is a schematic structural view of a glue-spraying plate;
FIG. 5 is a partial schematic view of the support table;
fig. 6 is a structural schematic diagram of the second support cylinder.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a support table; 11. supporting legs; 12. a plastic pad; 13. an installation table; 2. a glue spraying mechanism; 21. a rubber delivery pipe; 22. a storage cylinder; 23. a heating cylinder; 24. spraying a glue plate; 241. feeding a rubber tube; 242. a heating block; 243. a shunt tube; 244. a glue spraying pipe; 245. spraying glue holes; 3. a cloth rolling mechanism; 31. a support bar; 32. a first support cylinder; 33. a second support cylinder; 34. a conductive cloth roller; 35. a cloth blocking disc; 36. a limiting block; 4. a support block; 5. a transition mechanism; 51. a first L-shaped link; 52. a transition drum; 53. a first slide bar; 6. a winding mechanism; 61. a second L-shaped link; 62. a second slide bar; 63. and (6) winding the roll.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a preparation method of omnibearing conductive polyurethane foam, which comprises the following steps:
firstly, preparing foam, namely cutting foamed sponge taking polyurethane as a main component into sheets, wherein the thickness of the foam is 5 mm;
step two, preparing conductive cloth, namely firstly installing a target material corresponding to a plating layer in a plating area in a vacuum chamber, wherein the target material is a copper rod, and placing the polyurethane fiber lattice cloth in the vacuum chamber; secondly, vacuumizing the vacuum chamber to a background vacuum degree, filling inert gas, and controlling and maintaining the pressure in the vacuum chamber at a preset pressure; further conveying the polyurethane fiber grid cloth to pass through a plating area, starting a multi-arc power supply, and plating a copper layer on the grid cloth through multi-arc ion plating to form conductive cloth; finally, a nickel-plated layer target is arranged in a plating area in the vacuum chamber, so that the outer layer of the conductive cloth is coated with a nickel protective layer;
step three, cleaning the foam, and removing dust and impurities on the foam;
and step four, spraying adhesive and pasting the cloth on the foam, and spraying hot melt adhesive and pasting the conductive cloth on the cut foam by using an adhesive and pasting device to enable the foam to have an all-dimensional conductive function.
The adhesive spraying and cloth sticking device is shown in figures 1-6 and comprises an operating table 1, wherein supporting legs 11 are fixedly connected at four corners of the lower surface of the operating table 1, mounting tables 13 are symmetrically arranged at the front end and the rear end of the upper surface of the operating table 1, the mounting tables 13 are welded on two sides of the upper surface of the operating table 1, the mounting tables 13 are 5cm high, a smooth plastic mat 12 covers the area between the two mounting tables 13, and polyurethane cotton can slide on the upper surface of the plastic mat 12 under the action of external force;
the front end of the mounting table 13 is symmetrically provided with the glue spraying mechanism 2, the rear end is provided with the cloth rolling mechanism 3, one end of the mounting table 13 far away from the glue spraying mechanism 2 is provided with the transition mechanism 5, and two supporting legs 11 far away from the glue spraying mechanism 2 are fixedly provided with the rolling mechanisms 6;
the glue spraying mechanisms 2 are symmetrically distributed on the two mounting tables 13, each glue spraying mechanism 2 comprises a glue conveying pipe 21, one end of each glue conveying pipe 21 is connected with a driving mechanism, the other end of each glue conveying pipe 21 is connected with a glue spraying head, each glue spraying head comprises a storage cylinder 22 and a heating cylinder 23, the storage cylinder 22 is communicated with the glue conveying pipes 21, the heating cylinder 23 is located on the outer side of the storage cylinder 22, the heating cylinder 23 is used for heating liquid glue conveyed by the glue conveying pipes 21 to prevent the liquid glue from solidifying due to large temperature difference, long time and the like to block the glue spraying heads, the heating cylinder 23 is a hollow cylindrical cylinder, the outer cylinder wall of the heating cylinder 23 is fixedly connected with three glue spraying plates 24, one ends of the glue spraying plates 24 penetrate through the heating cylinder 23 and the cylinder wall of the storage cylinder 22 to extend into the storage cylinder 22, the glue spraying plates 24 are located on the same plane, the included angle between every two glue spraying plates 24 is 120 degrees, each glue spraying plate 24 comprises, inside advancing rubber tube 241 one end intercommunication storage cylinder 22, other end intercommunication shunt tubes 243, shunt tubes 243 one side is equipped with a plurality of trompils, the welding has glue spraying pipe 244 in the trompil, glue spraying pipe 244 communicates with each other with shunt tubes 243, and a side of every glue spraying pipe 244 has seted up a plurality of glue spraying holes 245 on the surface, glue spraying head through setting up on glue spraying device 2, reached glue spraying fast, even and the wide effect of covering area, heating block 242 distributes respectively in the upper and lower both ends of advancing rubber tube 241, make liquid glue can not influence because of the cooling and spout gluey effect in transportation process.
The cloth rolling mechanism 3 comprises two supporting blocks 4 fixedly arranged on the upper surface of the mounting table 13, the supporting blocks 4 are rectangular cylinders with the lower ends welded on the upper surface of the mounting table 13 and vertically arranged, arc-shaped grooves are formed in the upper end surfaces of the supporting blocks 4, a first supporting cylinder 32 and a second supporting cylinder 33 are installed in the arc-shaped grooves, the first supporting cylinder 32 and the second supporting cylinder 33 are the same in size, the second supporting cylinder 33 comprises a first limiting ring 331 and a second limiting ring 332 at two ends, the diameters of the first limiting ring 331 and the second limiting ring 332 are larger than that of a cylinder cavity 333 inside the second supporting cylinder 33, the cylinder cavity 333 is matched with the arc-shaped grooves in the upper ends of the supporting blocks 4 in size, and the second supporting cylinder 33 can be taken out of the arc-shaped grooves in the upper ends of the supporting blocks 4, so that the conductive; the support rod 31 is fixedly installed inside the second support cylinder 33, the conductive cloth roller 34 is sleeved at the middle position of the support rod 31, the conductive cloth roller 34 can rotate on the support rod 31, the cloth blocking discs 35 are fixedly installed at the front end and the rear end of the conductive cloth roller 34, the diameter of each cloth blocking disc 35 is larger than that of the conductive cloth roller 34, a limiting block 36 is installed on one side, away from the conductive cloth roller 34, of each cloth blocking disc 35, each limiting block 36 is in threaded connection with the support rod 31, and each limiting block 36 is used for fixing the conductive cloth roller 34 to slide along the support rod 31 during rotation movement, so that the accuracy of a subsequent cloth pasting process is guaranteed;
the transition mechanism 5 is located on the left side of the operation platform 1 and comprises two first L-shaped connecting rods 51, one end of each first L-shaped connecting rod 51 is welded on the upper surface of the operation platform 1, the other end of each first L-shaped connecting rod 51 is fixedly connected with a first sliding rod 53, two ends of each first sliding rod 53 are fixedly connected with the corresponding first L-shaped connecting rod 51, a transition roller 52 is sleeved on each first sliding rod 53, the transition roller 52 can rotate on the corresponding first sliding rod 53, first limiting parts are fixedly mounted at two ends of each transition roller 52, the transition rollers 52 cannot move along the corresponding first sliding rods 53 in the rotating process, and the transition mechanism 5 is convenient for rolling of subsequent polyurethane cotton after adhesive tape pasting;
the winding mechanism 6 is positioned at the lower left of the transition mechanism 5, the winding mechanism 6 comprises two second L-shaped connecting rods 61, one end of each second L-shaped connecting rod 61 is fixedly connected to one side surface of each of the two supporting legs 11 on the left side at the lower end of the operating platform 1, the other end of each second L-shaped connecting rod 61 is fixedly connected with a second sliding rod 62, a winding drum 63 is sleeved on each second sliding rod 62, a driving motor is connected to the outside of the winding drum 63, and second limiting parts are arranged at two ends of the winding drum 63; the second limiting member is arranged to prevent the winding drum 63 from moving along the second sliding rod 62 during the rotation process, so as to ensure the winding effect.
The central shafts of the conductive cloth roller 34, the transition roller 52 and the winding roller 63 are in the same vertical plane and are parallel and aligned.
The invention also discloses the omnibearing conductive polyurethane foam which is prepared by the preparation method.
The working principle of the glue spraying and cloth sticking device is as follows:
polyurethane foam is flatly laid on the plastic pad 12, one end of the polyurethane foam is pulled to penetrate through the upper surface of the transition mechanism 5 and be fixed on the surface of the winding drum 63 of the winding mechanism 6, the winding drum 63 rotates under the driving action of the driving motor, the winding drum 63 in rotation drives the polyurethane foam to move, the upper surface of the polyurethane foam in the moving process is subjected to glue spraying treatment through the glue spraying mechanism 2, then the conductive cloth on the cloth rolling mechanism 3 is pasted on the upper surface of the polyurethane foam, the conductive cloth roller 34 is driven to rotate along with the rotation of the winding drum 63, and the process of pasting and covering the conductive cloth on the upper surface of the polyurethane foam is realized.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (7)
1. A preparation method of omnibearing conductive polyurethane foam is characterized by comprising the following steps:
firstly, preparing foam, namely cutting foamed sponge taking polyurethane as a main component into sheets, wherein the thickness of the foam is 1-10 mm;
step two, preparing conductive cloth, namely firstly installing a target material corresponding to a plating layer in a plating area in a vacuum chamber, wherein the target material is a copper rod, and placing the polyurethane fiber lattice cloth in the vacuum chamber; secondly, vacuumizing the vacuum chamber to a background vacuum degree, filling inert gas, and controlling and maintaining the pressure in the vacuum chamber at a preset pressure; further conveying the polyurethane fiber grid cloth to pass through a plating area, starting a multi-arc power supply, and plating a copper layer on the grid cloth through multi-arc ion plating to form conductive cloth; finally, a nickel-plated layer target is arranged in a plating area in the vacuum chamber, so that the outer layer of the conductive cloth is coated with a nickel protective layer;
step three, cleaning the foam, and removing dust and impurities on the foam;
and step four, spraying glue and sticking cloth on the foam, and spraying liquid glue and sticking conductive cloth on the cut foam by using a glue spraying and sticking cloth device to enable the foam to have an all-dimensional conductive function.
2. The preparation method of the omnibearing conductive polyurethane foam according to claim 1, wherein the adhesive spraying and cloth pasting device in the fourth step comprises an operation table (1), wherein supporting legs (11) are fixedly connected to four corners of the lower surface of the operation table (1), mounting tables (13) are symmetrically arranged at the front end and the rear end of the upper surface of the operation table (1), the mounting tables (13) are welded to two sides of the upper surface of the operation table (1), the mounting tables (13) have a height of 5cm, and a smooth plastic pad (12) covers the area between the two mounting tables (13);
the front end of the mounting table (13) is symmetrically provided with the glue spraying mechanism (2), the rear end is provided with the cloth rolling mechanism (3), one end of the mounting table (13) far away from the glue spraying mechanism (2) is provided with the transition mechanism (5), and two supporting legs (11) far away from the glue spraying mechanism (2) are fixedly provided with the rolling mechanism (6);
the glue spraying mechanisms (2) are symmetrically distributed on the two mounting tables (13), each glue spraying mechanism (2) comprises a glue conveying pipe (21), one end of each glue conveying pipe (21) is connected with a driving mechanism, the other end of each glue conveying pipe is connected with a glue spraying head, each glue spraying head comprises a storage cylinder (22) and a heating cylinder (23), each storage cylinder (22) is communicated with each glue conveying pipe (21), each heating cylinder (23) is positioned on the outer side of each storage cylinder (22), each heating cylinder (23) is a hollow cylindrical cylinder, the outer side cylinder wall of each heating cylinder is fixedly connected with three glue spraying plates (24), one end of each glue spraying plate (24) penetrates through the heating cylinder (23) and the cylinder wall of each storage cylinder (22) and extends into each storage cylinder (22), each glue spraying plate (24) is positioned on the same plane, the included angle between every two glue spraying plates (24) is 120 degrees, each glue spraying plate (24) comprises a glue inlet pipe (241), and heating blocks (242) are mounted at the upper, one end of the rubber inlet pipe (241) is communicated with the inside of the storage barrel (22), the other end of the rubber inlet pipe is communicated with the shunt pipe (243), one side of the shunt pipe (243) is provided with a plurality of holes, a rubber spray pipe (244) is welded in each hole, the rubber spray pipe (244) is communicated with the shunt pipe (243), and the surface of one side of each rubber spray pipe (244) is provided with a plurality of rubber spray holes (245);
the cloth rolling mechanism (3) comprises two supporting blocks (4) fixedly arranged on the upper surface of the mounting table (13), the supporting blocks (4) are rectangular cylinders with lower ends welded on the mounting table (13) and vertically placed, arc-shaped grooves are formed in the upper end faces of the supporting blocks (4), a first supporting cylinder (32) and a second supporting cylinder (33) are installed in the arc-shaped grooves, the first supporting cylinder (32) and the second supporting cylinder (33) are identical in size, the second supporting cylinder (33) comprises a first limiting ring (331) and a second limiting ring (332) at two ends, the diameters of the first limiting ring (331) and the second limiting ring (332) are larger than that of a cylinder cavity (333) in the second supporting cylinder (33), the cylinder cavity (333) is matched with the size of the arc-shaped grooves in the upper ends of the supporting blocks (4), the second supporting cylinder (33) can be taken out of the arc-shaped grooves in the upper ends of the supporting blocks (4), and supporting rods (31) are fixedly installed in the first supporting cylinder (32) and the second supporting cylinder (33, the middle position of bracing piece (31) is cup jointed with electrically conductive cloth cylinder (34), and electrically conductive cloth cylinder (34) can rotate on bracing piece (31), both ends fixed mounting has fender cloth dish (35) around electrically conductive cloth cylinder (34), and keeps off cloth dish (35) diameter and be greater than the diameter of electrically conductive cloth cylinder (34), keeps off cloth dish (35) and keeps away from one side of electrically conductive cloth cylinder (34) and installs stopper (36), stopper (36) and bracing piece (31) threaded connection.
3. The preparation method of the omnibearing conductive polyurethane foam according to claim 2, wherein the transition mechanism (5) is located on the left side of the operating table (1) and comprises two first L-shaped connecting rods (51), one end of each first L-shaped connecting rod (51) is welded to the upper surface of the operating table (1), the other end of each first L-shaped connecting rod (51) is fixedly connected with a first sliding rod (53), the two ends of each first sliding rod (53) are fixedly connected with the corresponding first L-shaped connecting rod (51), a transition roller (52) is sleeved on each first sliding rod (53), the transition roller (52) can rotate on the corresponding first sliding rod (53), and first limiting members are fixedly mounted at the two ends of each transition roller (52).
4. The preparation method of the omnibearing conductive polyurethane foam according to claim 2, wherein the winding mechanism (6) is positioned at the lower left of the transition mechanism (5), the winding mechanism (6) comprises two second L-shaped connecting rods (61), one ends of the second L-shaped connecting rods (61) are fixedly connected to one side surfaces of the two left supporting legs (11) at the lower end of the operating platform (1), the other end of the second L-shaped connecting rod (61) is fixedly connected with a second sliding rod (62), a winding drum (63) is sleeved on the second sliding rod (62), a driving motor is connected to the outside of the winding drum (63), and second limit pieces are arranged at two ends of the winding drum (63).
5. The method for preparing the all-round conductive polyurethane foam as claimed in claim 2, wherein the central axes of the conductive cloth roller (34), the transition roller (52) and the winding roller (63) are in the same vertical plane and are aligned in parallel.
6. The preparation method of the omnibearing conductive polyurethane foam according to claim 1, wherein the working method of the adhesive spraying and cloth sticking device comprises the following steps:
polyurethane cotton is flatly laid on a plastic pad (12), one end of the polyurethane cotton is pulled to penetrate through the upper surface of a transition mechanism (5) and fixed on the surface of a winding drum (63) of a winding mechanism (6), the winding drum (63) rotates under the driving action of a driving motor, the rotating winding drum (63) drives the polyurethane cotton to move, the upper surface of the polyurethane cotton in the moving process is subjected to glue spraying treatment by a glue spraying mechanism (2), then conductive cloth on a cloth winding mechanism (3) is pasted on the upper surface of the polyurethane cotton, the rotation of a conductive cloth roller (34) is driven along with the rotation of the winding drum (63), and the process of pasting and covering the conductive cloth on the upper surface of the polyurethane cotton is realized.
7. An all-round conductive polyurethane foam, characterized by being prepared by the preparation method of claim 1.
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