Conductive foam strip automatic assembly system and method

Abstract

The present invention discloses an automatic assembly system and method for conductive foam strips. The conductive foam strips include conductive cloth and foam strips, and include a coating mechanism, a molding mechanism, a traction mechanism, a pasting mechanism, and a cutting mechanism in the order of assembly. The tension state of the conductive foam strips is monitored in real time by a position sensor between a first traction part and a second traction part to adjust the traction speed of the first traction part, thereby ensuring that the surface of the conductive foam strips is smooth and wrinkle-free, and further improving the quality of the conductive foam strips. The heating part in the molding mechanism can completely melt the glue on the conductive cloth, so that the conductive cloth and the foam strips are tightly pasted together, and the generation of gaps between the conductive cloth and the foam strips is eliminated. By arranging anti-skid parts on the surfaces of the first transmission member and the second transmission member, the conductive foam is prevented from slipping due to low friction between the conductive foam and the surfaces of the first transmission member and the second transmission member.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and in particular to an automatic assembly system and method for conductive foam strips. Background Art

[0002] In some precision electronic products, it is necessary to use conductive cloth to wrap structural components such as foam core strips. In the existing processing method, the conductive cloth and foam core strips are processed separately. The conductive cloth is rolled up on the material tape in pieces, and the foam core strips are cut into segmented individuals, which are then manually assembled using jigs. Obviously, this assembly method is inefficient, and due to the small size of some components, manual assembly is more troublesome, which is prone to defects such as unstable product quality.

[0003] In addition, when the conductive foam strip is used in electronic products, it is affixed with double-sided tape. After the foam core strip is wrapped with conductive cloth and then attached with double-sided tape, the previously wrapped conductive foam strip will bend and wrinkle, and the double-sided tape cannot be attached well. Summary of the invention

[0004] In order to overcome the above disadvantages, the object of the present invention is to provide a conductive foam strip automatic assembly system and method.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: an automatic assembly system for conductive foam strips, the conductive foam strips include conductive cloth and foam strips, and in the order of assembly, they include a coating mechanism, a molding mechanism, a traction mechanism, a pasting mechanism and a cutting mechanism, wherein: the coating mechanism includes a guide tube and a cavity, the guide tube includes a notch; the cavity includes a portion for accommodating the foam strip and the conductive cloth, and the side wall of the cavity is used to fold the two folded edges of the conductive cloth; the molding mechanism includes a heating part and a cooling part, the heating part is used to heat the conductive cloth to achieve The temperature is set to make the conductive cloth sticky; the cooling part cools down the heated foam strip; the pasting mechanism includes a material tray and a pasting mold, the material tray is used to store the material roll, the double-sided adhesive material is peeled off from the material roll and pasted to the surface of the conductive foam strip; the pasting mold is provided with a groove, the groove can accommodate the conductive foam strip and the double-sided adhesive material after pasting; the traction mechanism clamps and pulls the conductive foam strip forward to complete the coating and pasting of the conductive foam strip; the cutting mechanism cuts the conductive foam strip into the required size under the action of the traction mechanism.

[0006] A limit block is set on the coating tool. By adjusting the position of the limit block, the size of the limit groove can be adjusted to adapt to conductive cloths of different sizes and optimize the structure. When necessary, the limit block can also apply a certain pressing force to the surface of the conductive cloth to ensure the stability of the conductive cloth forming process.

[0007] The heating part includes a heating upper plate and a heating lower plate. The heating lower plate is provided with a groove, which can accommodate the conductive foam strip. The heating upper plate or the heating lower plate is provided with a heating wire, which can heat the conductive cloth. The heating part can completely melt the glue on the conductive cloth, so that the conductive cloth and the foam strip are tightly attached together, eliminating the generation of gaps between the conductive cloth and the foam strip.

[0008] The cooling part includes a cooling upper plate and a cooling lower plate. The cooling lower plate is provided with a groove, which can accommodate the conductive foam strip. The cooling upper plate or the cooling lower plate is provided with a coolant channel, which can cool the conductive foam strip. Timely cooling can make the conductive foam strip quickly take shape, avoiding excessive heating, so that the hot melt adhesive will overflow the surface of the conductive cloth.

[0009] The traction mechanism includes a first traction part and a second traction part. The first traction part is arranged behind the covering mechanism and is used to pull the foam strip and the conductive cloth through the covering mechanism. The second traction part is arranged behind the pasting mechanism and is used to pull the conductive foam strip through the pasting mechanism. The first traction part and the second traction part can be lifted and lowered by a lifting member.

[0010] The device also includes a speed regulating device, which is disposed between the first traction part and the second traction part and is used to adjust the traction speed of the first traction part. The speed regulating device includes a position sensor, which is triggered when the conductive foam strip contacts the position sensor, and controls the speed regulating device to reduce the transmission speed, thereby ensuring that the surface of the conductive foam strip is flat and wrinkle-free, further improving the quality of the conductive foam strip.

[0011] The pasting mechanism includes a unwinding material tray, a rewinding material tray and a distance sensor. The distance sensor is close to one side of the pasting mold. After a set of double-sided adhesive materials is peeled off, the distance sensor can start the rewinding and stripping tray to continue unwinding the material.

[0012] The second traction part is provided with an anti-skid piece, which contacts and provides friction to the conductive foam strip, so that it is conveyed forward, thereby increasing the clamping force on the conductive foam and preventing the conductive foam from slipping due to the small friction between the conductive foam and the conveyor belt.

[0013] It also includes a circuit control mechanism, which can control the start and stop of the forming mechanism, the traction mechanism and the cutting mechanism.

[0014] A conductive foam strip automatic assembly method is implemented using the conductive foam strip automatic assembly system described above, the method comprising:

[0015] At room temperature, a layer of conductive cloth is wrapped around the outside of the conductive foam strip;

[0016] The conductive foam strip wrapped with conductive cloth is heated to melt the colloid on the conductive cloth and bond it to the conductive foam strip. The heating temperature range is 100±10℃;

[0017] Cool down the shaped conductive foam strips, the cooling temperature range is 20±10℃;

[0018] A double-sided adhesive material is pasted on the surface of the conductive foam strip and then shaped;

[0019] Automatically cut the conductive foam strips into required sizes.

[0020] The beneficial effects of the present invention are:

[0021] By using a position sensor between the first traction part and the second traction part, the tension state of the conductive foam strip is monitored in real time to adjust the traction speed of the first traction part, thereby ensuring that the surface of the conductive foam strip is flat and wrinkle-free, and further improving the quality of the conductive foam strip. The heating part in the molding mechanism can completely melt the glue on the conductive cloth, so that the conductive cloth and the foam strip are tightly adhered together, eliminating the generation of gaps between the conductive cloth and the foam strip. By setting anti-slip parts on the surfaces of the first transmission part and the second transmission part, the conductive foam is prevented from slipping due to the small friction between the surfaces of the first transmission part and the second transmission part. By setting the lifting part, the distance between the first transmission part and the second transmission part can be changed, conductive foams of different thicknesses can be used, the clamping force on the conductive foam can be adjusted, and the applicable range of the second traction part can be increased. By setting a distance sensor on the pasting mechanism to link with the driving part, when the peeling point of the double-sided tape gradually approaches the distance sensor, the distance sensor transmits a signal to the driving part, so that the winding material disk rotates to separate more double-sided tape. While the winding material disk rotates, it can pull the unwinding material disk to rotate synchronously through the base tape, which can improve the feeding efficiency of the double-sided adhesive material. By setting a limit block on the outer surface of the edge of the guide tube of the coating tool, a limit groove for the conductive cloth to pass through is formed between the limit block and the inner surface of the guide tube. By adjusting the position of the limit block, the size of the limit groove can be adjusted to adapt to conductive cloths of different sizes, and the structure is optimized; and the limit block can also apply a certain pressing force to the surface of the conductive cloth to ensure the stability of the conductive cloth forming process, fundamentally improving the flatness of the surface of the conductive foam strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of an automatic assembly system for conductive foam strips according to an embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of a covering mechanism according to an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a coating tool according to an embodiment of the present invention;

[0025] Figure 4 It is a structural schematic diagram of a forming mechanism according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic structural diagram of a first traction part according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a position sensor according to an embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of a second traction part according to an embodiment of the present invention;

[0029] Figure 8 This is a structural schematic diagram of a pasting mold according to an embodiment of the present invention;

[0030] Fig. 9 It is a schematic diagram of the positions of the second adjusting member and the cam member according to an embodiment of the present invention;

[0031] Fig.10 This is a schematic diagram of the structure of a distance sensor and an unwinding tray according to an embodiment of the present invention;

[0032] Fig.11 This is a schematic diagram of the position of the double-sided adhesive material and the pasting mechanism according to an embodiment of the present invention;

[0033] Fig.12 It is a structural schematic diagram of a cutting mechanism according to an embodiment of the present invention.

[0034] In the figure: 1, covering mechanism; 1011, guide tube; 1012, chamber; 1013, limit block;

[0035] Forming mechanism; 201, heating part; 2011, heating upper plate; 2012, heating lower plate; 202, cooling part; 2021, cooling upper plate; 2022, cooling lower plate; 203, adjusting handle; traction mechanism; 301, first traction part; 3011, upper pulley; 3012, lower pulley; 3013, first adjusting member; 302, second traction part; 3021, anti-slip member; 3022, first transmission member; 3023, second transmission member; 3024, lifting member; 401, unwinding material tray; 402, winding material tray; 403, pasting mold; 4031, second adjusting member; 4032, pasting entrance; 4033, cam member; 404, distance sensor; 405, guide block; 406, driving member;

[0036] 5. Cutting mechanism; 6. Position sensor; 7. Circuit control mechanism; 8. Double-sided adhesive material; 801. Base tape; 802. Double-sided tape. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See attached Figure 1 To Attachment Figure 3 As shown, in this embodiment, an automatic assembly system for a conductive foam strip includes a conductive cloth and a foam strip, and includes a coating mechanism 1, a molding mechanism 2, a traction mechanism 3, a pasting mechanism and a cutting mechanism 5 in the order of assembly, wherein: the coating mechanism 1 includes a guide tube 1011 and a cavity 1012, and the guide tube 1011 includes a notch; the cavity 1012 is used to accommodate the foam strip and the conductive cloth, and the side wall of the cavity 1012 is used to fold the two folded edges of the conductive cloth;

[0041] See attached Figure 3 As shown, at least one stopper 1013 is provided on the outer surface of the edge portion of the curved guide tube 1011 after being bent, and a stopper groove for the conductive cloth to pass through is formed between each stopper 1013 and the inner surface of the curved guide tube 1011. In this embodiment, preferably, the stopper 1013 is in a shape matching with the curved guide tube 1011 on one surface facing the curved guide tube 1011. Through the above-mentioned setting, during the operation of the conductive cloth, the conductive cloth can always be ensured to fit the inner surface of the curved guide tube 1011, thereby ensuring the accuracy of the conductive cloth being folded and the stability of the operation.

[0042] In some embodiments, the stopper 1013 is made of elastic material, and the stopper 1013 can slide along the forming direction of the conductive cloth. Through the above-mentioned setting, by adjusting the position of the stopper 1013, the size of the stopper groove can be adjusted to adapt to conductive cloths of different sizes and optimize the structure; and when necessary, the stopper 1013 can also apply a certain pressing force to the surface of the conductive cloth to ensure the stability of the conductive cloth forming process.

[0043] See attached Figure 4 As shown, the molding mechanism 2 includes a heating part 201 and a cooling part 202. The first traction part 301 is started to pass the foam strip covered with the conductive cloth through the heating part 201. The heating part 201 is used to heat the conductive cloth to a set temperature, melt the hot melt adhesive on the conductive cloth, and make the conductive cloth sticky. After being squeezed by the heating part 201, the conductive cloth and the foam strip are fully adhered together, thereby producing conductive foam; the cooling part 202 cools the heated foam strip.

[0044] The pasting mechanism includes a stripping plate and a pasting mold 403. The stripping plate is used to store the material roll. The double-sided adhesive material 8 is peeled off from the material roll and pasted to the surface of the conductive foam strip. The pasting mold 403 is provided with a groove, which can accommodate the conductive foam strip and the double-sided adhesive material 8 after pasting. The traction mechanism 3 clamps and pulls the conductive foam strip to convey it forward to complete the coating and pasting of the conductive foam strip. See the attached Figure 1 As shown, the cutting mechanism 5 cuts the conductive foam strip into required sizes under the action of the second traction part 302 .

[0045] See attached Figure 4 As shown, in some embodiments, the heating part 201 includes a heating upper plate 2011 and a heating lower plate 2012. The heating lower plate 2012 is provided with a groove, which can accommodate the conductive foam strip. The heating upper plate 2011 and / or the heating lower plate 2012 are provided with a heating wire, which can heat the conductive cloth. The heating wire is arranged in an arc shape, which can increase the heating contact area. Because the conductive cloth is coated with a conductive hot melt adhesive system, conductive particles are added to the hot melt adhesive, which is not sticky at room temperature and is activated by high temperature 100±10°C during operation. The position of the heating upper plate 2011 and / or the heating lower plate 2012 can be adjusted by adjusting the handle 203, so that it is convenient to produce conductive foams of different thicknesses according to production needs.

[0046] See attached Figure 4As shown, in some embodiments, the cooling unit 202 includes a cooling upper plate 2021 and a cooling lower plate 2022. The cooling lower plate 2022 is provided with a groove, which can accommodate the conductive foam strip. The cooling upper plate 2021 and / or the cooling lower plate 2022 are provided with a coolant channel to cool the conductive foam strip. Timely cooling can make the conductive foam strip quickly formed, avoid excessive heating, so that the hot melt adhesive will overflow the surface of the conductive cloth, wrap it in all directions, and then pass through the cooling device at 20℃±10℃ for shaping and cutting, thereby improving the quality of the conductive foam strip.

[0047] See attached Figure 5 and attached Figure 7 As shown, in some embodiments, the traction mechanism 3 includes a first traction part 301 and a second traction part 302. The first traction part 301 is arranged behind the coating mechanism 1, and is used to pull the foam strip and the conductive cloth through the coating mechanism 1. The second traction part 302 is arranged behind the pasting mechanism, and is used to pull the conductive foam strip through the pasting mechanism. The first traction part 301 and the second traction part 302 can be lifted and lowered by a lifting member 3024.

[0048] See attached Figure 5 As shown, the first traction part 301 includes an upper pulley 3011 and a lower pulley 3012, which are symmetrically arranged up and down and can be driven by two different driving motors. When speed regulation is required, the speed of the driving motor can be controlled.

[0049] In some embodiments, a speed regulating device is further included. The speed regulating device is disposed between the first traction part 301 and the second traction part 302 and is used to adjust the traction speed of the first traction part 301. The speed regulating device includes a position sensor 6. When the conductive foam strip contacts the position sensor 6, the speed regulating device is triggered and controls the speed regulating device to reduce the transmission speed. Figure 6 As shown, a position sensor 6 is provided between the first traction part 301 and the second traction part 302 to monitor the tension state of the conductive foam strip in real time to adjust the traction speed of the first traction part 301, thereby ensuring that the surface of the conductive foam strip is smooth and wrinkle-free, and further improving the quality of the conductive foam strip.

[0050] The specific working principle of the above-mentioned position sensor 6 is: the position sensor 6 is arranged between the first traction part 301 and the second traction part 302, and is located directly below the conductive foam strip. When the conductive foam strip is in a taut state, the conductive foam strip is away from the position sensor 6, and the position sensor 6 has no signal output; when the speed of the first traction part 301 is greater than the speed of the second traction part 302, the conductive foam strip between the first traction part 301 and the second traction part 302 is in a drooping state, wrinkles appear on the surface of the conductive foam strip, and the conductive foam strip gradually approaches the position sensor 6. At this time, the position sensor 6 is triggered, and the optical signal is converted into an electrical signal. The speed of the first traction part 301 is reduced by the speed regulating device, and the conductive foam strip is restored to a taut state, thereby ensuring the flatness of the surface of the conductive foam strip.

[0051] See attached Figure 8 To Attachment Fig.10 As shown, in some embodiments, the pasting mechanism includes a discharge material tray 401, a reeling material tray 402 and a distance sensor 404. The double-sided adhesive material 8 is placed on the discharge material tray 401. The double-sided adhesive material 8 includes a base tape 801 and a double-sided tape 802 attached to the base tape 801. The reeling material tray 402 is used to collect the base tape 801. After the double-sided tape 802 is peeled off from the base tape 801, it enters the pasting mold 403 and is pasted on the surface of the conductive foam strip. The second traction part 302 drives the conductive foam strip to move, thereby driving the double-sided tape 802 to be peeled off from the base tape 801. The distance sensor 404 is close to one side of the pasting mold 403. After a group of double-sided adhesive materials 8 are peeled off, when the peeling point of the double-sided tape 802 gradually approaches the distance sensor 404, the distance sensor 404 can start the reeling material tray 402 to rotate, and the reeling material tray 402 continues to collect the base tape 801, while releasing more double-sided tape 802 for use.

[0052] See attached Figure 7 As shown, in some embodiments, the second traction part 302 is provided with an anti-slip member 3021, and the anti-slip member 3021 contacts and provides friction to the conductive foam strip to transport it forward. Since the conductive foam itself is light and soft, there is a phenomenon of the conductive foam slipping when the second traction part 302 transports the conductive foam. The distance between the first transmission member 3022 and the second transmission member 3023 can be adjusted to increase the clamping force on the conductive foam to prevent the conductive foam from slipping, but at the same time, the conductive foam will be deformed due to being squeezed. The present application sets an anti-slip member 3021 on the surface of the first transmission member 3022 and the second transmission member 3023, and while contacting the conductive foam, the conductive foam is transported forward. The setting of the anti-slip member 3021 prevents the conductive foam from slipping due to the small friction between the conductive foam and the conveyor belt.

[0053] See attached Figure 7As shown, in some embodiments, the anti-slip member 3021 is a double-sided adhesive, one side of the double-sided adhesive is attached to the first transmission member 3022 and the second transmission member 3023, and the other side is used to adhere to the conductive foam, ensuring that the conductive foam moves synchronously with the conveyor belt due to the adhesion of the double-sided adhesive. When the conductive foam is transmitted to the discharge end of the second traction part 302, the double-sided adhesive moves synchronously with the transmission member under the action of the transmission member, and is separated from the conductive foam at this time, and the conductive foam is transmitted to the next station.

[0054] See attached Figure 7 As shown, the first transmission member 3022 is arranged above the second transmission member 3023, and the first transmission member 3022 can be lifted and lowered in the up and down directions by the lifting member 3024 to adjust the distance between the first transmission member 3022 and the second transmission member 3023, and can transport conductive foams of different heights and sizes. The lifting member 3024 includes a driving motor and a guide rod, one end of the guide rod is connected to the first transmission member 3022, and the other end passes through the second transmission member 3023 and is connected to the driving motor. Under the action of the driving motor, the guide rod drives the first transmission member 3022 to lift and lower in the up and down directions.

[0055] See attached Figure 8 As shown, the pasting mold 403 is provided with a pasting entrance 4032, and the conductive foam strip and the double-sided tape 802 enter the pasting mold 403 from the pasting entrance 4032, thereby completing the attachment of the double-sided tape 802 to the surface of the conductive foam strip. The pasting mold 403 also includes a second adjusting member 4031 below it, which is used to adjust the height of the pasting mold 403, and can be specifically a rotatable cam structure.

[0056] See attached Fig. 9 As shown, since the cam member 4033 adopts a rolling friction pair, it has better durability and stability when bearing a certain load. Compared with other transmission devices, the cam member 4033 is small in size and light in weight, which makes it possible to reduce the weight of the pasting mold 403 within the limited space of the pasting mold 403.

[0057] See attached Fig.10 and attached Fig.11 As shown, the double-sided adhesive material 8 is placed on the unwinding material tray 401, and the double-sided tape 802 is peeled off from the base tape 801 and enters the pasting mold 403 to be pasted with the surface of the conductive foam strip. As the reel 402 continues to rewind the base tape 801, more double-sided tape 802 is released from the unwinding material tray 401 for use by the pasting mold 403.

[0058] See attached Fig.11As shown, the winding material tray 402 also includes a driving member 406, which is used to drive the winding material tray 402 to rotate. The distance sensor 404 is linked with the driving member 406. When the peeling point of the double-sided tape 802 gradually approaches the distance sensor 404, the distance sensor 404 transmits a signal to the driving member 406 to rotate the winding material tray 402 to separate more double-sided tape 802. While the winding material tray 402 rotates, it can pull the unwinding material tray 401 through the base tape 801 to rotate synchronously.

[0059] See attached Fig.11 As shown, the pasting mechanism also includes two guide blocks 405, which are arranged above the distance sensor 404, one of the guide blocks 405 is fixed, and the other guide block 405 can swing in the horizontal plane. The distance between the two guide blocks 405 can be adjusted to accommodate the passage of double-sided tapes 802 of different widths. The two guide blocks 405 can avoid deviation during winding, thereby improving the stability of the pasting of the double-sided adhesive material 8.

[0060] See attached Fig.11 As shown, the specific working principle of the pasting mechanism is as follows: after the double-sided tape 802 is peeled off from the base tape 801, it enters the pasting mold 403 and is pasted to the surface of the conductive foam strip, and the second traction part 302 drives the conductive foam strip to move, thereby driving the double-sided tape 802 to be peeled off from the base tape 801. After the double-sided adhesive material 8 is peeled off, the peeling point of the double-sided tape 802 gradually approaches the distance sensor 404. When the distance sensor 404 senses that the double-sided tape 802 is within a certain distance range, the distance sensor 404 can start the winding material tray 402 to rotate, and the winding material tray 402 continues to rewind the base tape 801, and the unwinding material tray 401 releases more double-sided tape 802. The point where the double-sided tape 802 is peeled off from the base tape 801 also gradually moves away from the distance sensor 404 as the base tape 801 is collected, and the winding material tray 402 stops winding.

[0061] See attached Fig.12 As shown, under the traction of the traction mechanism 3, automatic cutting can be performed, and the cutting length or cutting interval can be set, for example, the pause time is 1-3s, or it can be connected with the cutting equipment to cut into the required special shape. The whole process consumes less human resources, which can reduce material waste and increase material utilization.

[0062] See attached Figure 1 As shown, in some embodiments, a circuit control mechanism 7 is also included, which can control the start and stop of the forming mechanism 2, the traction mechanism 3 and the cutting mechanism 5.

[0063] The present invention also protects a conductive foam strip automatic assembly method, which is implemented by using any of the above conductive foam strip automatic assembly systems, and the method comprises:

[0064] Wrapping: Under normal temperature, wrap a layer of conductive cloth on the outside of the conductive foam strip;

[0065] In this step, the coating tool includes a guide tube 1011 and a cavity 1012, wherein the guide tube 1011 includes a notch; the cavity 1012 is used to accommodate the foam strip and the conductive cloth, and the side wall of the cavity 1012 is used to fold the two folded edges of the conductive cloth; at least one limit block 1013 is provided on the outer surface of the edge portion of the curved guide tube 1011 after being bent, and a limit groove for the conductive cloth to pass through is formed between each limit block 1013 and the inner surface of the curved guide tube 1011. In this embodiment, preferably, the limit block 1013 faces a surface of the curved guide tube 1011 and is in a shape matching with the curved guide tube 1011. Through the above-mentioned setting, during the operation of the conductive cloth, it can always be ensured that the conductive cloth is in contact with the inner surface of the curved guide tube 1011, thereby ensuring the accuracy of the conductive cloth being folded and the stability of the operation.

[0066] Heating: Heat the conductive foam strip wrapped with conductive cloth to melt the colloid on the conductive cloth and bond it to the conductive foam strip. The heating temperature range is 100±10℃;

[0067] In this step, the heating part 201 includes a heating upper plate 2011 and a heating lower plate 2012. The heating lower plate 2012 is provided with a groove, which can accommodate a conductive foam strip. The heating upper plate 2011 and / or the heating lower plate 2012 are provided with a heating wire, which can heat the conductive cloth. The heating wire is arranged in an arc shape, which can increase the heating contact area. Because the conductive cloth is coated with a conductive hot melt adhesive system, conductive particles are added to the hot melt adhesive, which has no viscosity at room temperature and is activated by a high temperature of 100±10°C during operation.

[0068] Cooling: Cool the conductive foam strips after shaping, the cooling temperature range is 20±10℃;

[0069] Pasting: Pasting double-sided adhesive material 8 on the surface of the conductive foam strip and shaping it;

[0070] In the pasting step, after the double-sided tape 802 is peeled off from the base tape 801, it enters the pasting mold 403 and is pasted on the surface of the conductive foam strip. The second traction part 302 drives the conductive foam strip to move, thereby driving the double-sided tape 802 to be peeled off from the base tape 801. After the double-sided adhesive material 8 is peeled off, the peeling point of the double-sided tape 802 gradually approaches the distance sensor 404. When the distance sensor 404 senses that the double-sided tape 802 is within a certain distance range, the distance sensor 404 can start the winding material tray 402 to rotate, and the winding material tray 402 continues to rewind the base tape 801. The unwinding material tray 401 releases more double-sided tape 802. The point where the double-sided tape 802 is peeled off from the base tape 801 also gradually moves away from the distance sensor 404 as the base tape 801 is collected, and the winding material tray 402 stops winding.

[0071] Cutting: Automatically cut the conductive foam strips into the required size;

[0072] In the cutting step, the time required by the timer is calculated by the running speed of the conductive foam strip and the set length that the conductive foam strip needs to be cut, and the timer is used to calculate the time and cut at a fixed time, thereby realizing the function of cutting the material to a fixed length; the time required for the running length of the material to reach the set length is calculated by the fixed-length mechanism, and it is judged whether the running length of the material reaches the set length according to the timing time. After the material length reaches the set length, the fixed-length mechanism controls the cutting mechanism to cut the material, thereby completing the fixed-length cutting operation of the material.

[0073] Traction: The above steps are completed under traction.

[0074] In the traction step, the traction mechanism 3 includes a first traction part 301 and a second traction part 302. The first traction part 301 is arranged behind the coating mechanism 1, and is used to pull the foam strip and the conductive cloth through the coating mechanism 1. The second traction part 302 is arranged behind the pasting mechanism, and is used to pull the conductive foam strip through the pasting mechanism. The first traction part 301 and the second traction part 302 can be lifted and lowered by the lifting part 3024.

[0075] The first traction part 301 includes an upper pulley 3011 and a lower pulley 3012. The upper pulley 3011 and the lower pulley 3012 are symmetrically arranged up and down and can be driven by two different driving motors. When speed regulation is required, the speed of the driving motor can be controlled.

[0076] The transmission device further includes a speed regulating device, which is disposed between the first traction part 301 and the second traction part 302 and is used to adjust the traction speed of the first traction part 301. The speed regulating device includes a position sensor 6. When the conductive foam strip contacts the position sensor 6, the speed regulating device is triggered and controls the speed regulating device to reduce the transmission speed. Figure 6As shown, a position sensor 6 is provided between the first traction part 301 and the second traction part 302 to monitor the tension state of the conductive foam strip in real time to adjust the traction speed of the first traction part 301, thereby ensuring that the surface of the conductive foam strip is smooth and wrinkle-free, and further improving the quality of the conductive foam strip.

[0077] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic assembly system for conductive foam strips, the conductive foam strips comprising conductive cloth and foam strips, characterized in that: The assembly sequence includes a covering mechanism, a forming mechanism, a pulling mechanism, a pasting mechanism and a cutting mechanism, wherein: the covering mechanism includes a covering tool, the covering tool includes a guide tube and a cavity, the guide tube includes a notch; the cavity includes a portion for accommodating the foam strip and the conductive cloth, the side wall of the cavity is used to fold the two folded edges of the conductive cloth, at least one stop block is provided on the outer surface of the edge of the guide tube, a stop groove for the conductive cloth to pass through is formed between the stop block and the inner surface of the guide tube, and the two side edges of the vertical portion of the guide tube have a bending portion bent toward the inner side of the guide tube; The molding mechanism comprises a heating part and a cooling part, the heating part comprises a heating upper plate and a heating lower plate, the heating lower plate is provided with a groove, the groove can accommodate the conductive foam strip, at least one of the heating upper plate and the heating lower plate is provided with a heating wire, which can heat the conductive cloth; the cooling part comprises a cooling upper plate and a cooling lower plate, the cooling lower plate is provided with a groove, the groove can accommodate the conductive foam strip, the cooling upper plate or the cooling lower plate is provided with a cooling liquid channel, which can cool the conductive foam strip; The pasting mechanism includes a material tray and a pasting mold. The material tray is used to store the material roll. The double-sided adhesive material is peeled off from the material roll and pasted to the surface of the conductive foam strip. The pasting mold is provided with a groove, and the groove can accommodate the conductive foam strip and the double-sided adhesive material after pasting. The material tray includes a reeling material tray and a reeling material tray. The pasting mechanism also includes two guide blocks and a distance sensor. The distance sensor is close to one side of the pasting mold. When the double-sided adhesive material is peeled off, the peeling point of the double-sided tape gradually approaches the distance sensor. When the distance sensor senses that the double-sided tape is within a certain distance range, the distance sensor can start the reeling material tray to rotate, and the reeling material tray continues to reel in the base tape. The unreeling material tray releases more double-sided tape. The point where the double-sided tape is peeled off from the base tape also gradually moves away from the distance sensor as the base tape is collected, and the reeling material tray stops reeling. One of the guide blocks is fixed, and the other can swing in a horizontal plane. The distance between the two guide blocks can be adjusted for the passage of double-sided tapes of different widths. The traction mechanism clamps and pulls the conductive foam strip forward to complete the coating and pasting of the conductive foam strip. The traction mechanism includes a first traction part and a second traction part. The first traction part is arranged behind the coating mechanism and is used to pull the foam strip and the conductive cloth through the coating mechanism. The second traction part is arranged behind the pasting mechanism and is used to pull the conductive foam strip through the pasting mechanism. The first traction part and the second traction part can be lifted and lowered by a lifting member. The second traction part includes at least a rotatable first transmission member and a second transmission member. The first transmission member and the second transmission member are respectively provided with anti-slip members. The anti-slip members contact and provide friction to the conductive foam strip to make it be transported forward. The cutting mechanism cuts the conductive foam strip under the action of the traction mechanism.

2. The conductive foam strip automatic assembly system according to claim 1, characterized in that: It also includes a speed regulating device, which is arranged between the first traction part and the second traction part. The speed regulating device includes a position sensor, which is arranged between the first traction part and the second traction part and is located directly below the conductive foam strip. The position sensor can adjust the traction speed of the first traction part according to the tightness of the conductive foam strip.

3. The conductive foam strip automatic assembly system according to claim 2, characterized in that: The speed regulating device comprises a position sensor, which is triggered when the conductive foam strip contacts the position sensor and controls the speed regulating device to reduce the conveying speed.

4. A method for automatically assembling a conductive foam strip, characterized in that: The method is implemented by using the conductive foam strip automatic assembly system according to any one of claims 1 to 3, and the method comprises: At room temperature, a layer of conductive cloth is wrapped around the outside of the conductive foam strip; The conductive foam strip wrapped with conductive cloth is heated to melt the colloid on the conductive cloth and bond with the conductive foam strip. The heating temperature range is 100±10℃; Cool the shaped conductive foam strips to a temperature range of 20±10℃; A double-sided adhesive material is pasted on the surface of the conductive foam strip and then shaped; Automatically cut the conductive foam strips into required sizes.

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