Molded antistatic multi-vee belt and method of making same

Abstract

The present application relates to a kind of moulding antistatic multi-ribbed belt and its manufacturing method, comprising the following steps: S1, the raw materials of rubber, textile material, string and conductive wire are inspected, and unqualified product is rejected;S2, the wedge surface conductive canvas layer of embedded conductive wire is manufactured;S3, the mixing rubber of back rubber, adhesive and wedge tooth rubber is prepared;S4, the band cylinder is formed by sequentially coating each layer structure on forming drum;S5, the band cylinder is placed into mould and vulcanized, and wedge tooth is formed once;S6, the band cylinder after vulcanization is cut, detected and packaged.The beneficial effects of the present application are: by embedding conductive wire in wedge canvas to form conductive path, static electricity can be quickly discharged, and hidden troubles such as static adsorption and signal interference are solved;Conductive wire structure is set outside rubber base material, without filling conductive carbon black in rubber compound, without affecting the original physical properties of rubber compound, and the bending performance of belt is improved.

Description

Technical Field

[0001] This invention relates to the field of wedge belt technology, specifically to a molded antistatic multi-wedge belt and its manufacturing method. Background Technology

[0002] During high-speed operation, the continuous friction between the drive belt and the metal pulley easily generates static charge. Static electricity can not only interfere with the signal transmission of the engine's precision sensors, leading to misjudgments by the electronic control system, but also poses a safety hazard of igniting fuel vapors. Therefore, antistatic performance has become one of the core indicators of modern automotive drive belts.

[0003] In the existing technology, the mainstream solution to achieve the antistatic function of transmission belts is to fill the rubber compound with conductive carbon black. However, the dispersion of conductive carbon black in the rubber matrix is ​​difficult to control precisely, resulting in large fluctuations in the surface resistance of the belt and uneven antistatic effect. At the same time, filling with conductive carbon black will significantly increase the hardness of the rubber compound, causing a significant decrease in the belt's flexural performance, making it prone to fatigue cracks under repeated bending conditions. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application proposes a molding antistatic multi-wedge belt and its manufacturing method. By embedding conductive wires within the wedge-shaped canvas to form a conductive path, triboelectric static charge can be quickly discharged, solving potential problems such as electrostatic adsorption and signal interference. The conductive wire structure is located outside the rubber substrate, eliminating the need to fill the rubber compound with conductive carbon black, thus not affecting the original physical properties of the rubber compound and improving the belt's flexibility.

[0005] The following is the technical solution of the present invention: a method for manufacturing a molded antistatic multi-wedge tape, comprising the following steps:

[0006] S1. Inspect raw materials such as rubber, textile materials, ropes and conductive wires, and remove unqualified products;

[0007] S2. Manufacturing a wedge-shaped conductive canvas layer with embedded conductive wires;

[0008] S3. Prepare the compound of back rubber, adhesive and wedge rubber;

[0009] S4. Layers of structure are sequentially wrapped around the forming drum to form a belt tube;

[0010] S5. Place the strip into the mold for vulcanization to form the wedge teeth in one step;

[0011] S6. Cut, inspect, and package the vulcanized strip.

[0012] As a preferred embodiment of the present invention, S2 includes the following steps:

[0013] S201. Using a warp knitting machine, conductive filaments are continuously woven into nylon fibers along the weft direction of the canvas to form a canvas base.

[0014] S202. Control the weft spacing of the conductive wires according to the required surface resistance of the canvas.

[0015] S203. Perform constant tension heat setting treatment on the woven canvas;

[0016] S204. Immerse the canvas in a dyeing vat for dyeing and then perform gradient drying.

[0017] In a preferred embodiment of the present invention, in S202, the weft spacing of the conductive wires is controlled based on surface resistance, as expressed below:

[0018]

[0019] In the above formula, The surface resistance of the canvas. ρ is the linear resistivity of the conductive wire. The effective distance between electrodes. This represents the latitudinal spacing between adjacent conductive wires. This represents the number of conductive wires.

[0020] As a preferred embodiment of the present invention, in S204, two-stage gradient drying is performed: the first stage drying temperature is 100°C to 120°C and the time is 20s to 30s; the second stage drying temperature is 140°C to 160°C and the time is 30s to 40s.

[0021] As a preferred embodiment of the present invention, in S5, a staged gradient temperature and pressure vulcanization process is performed, including:

[0022] In the first stage, the internal expansion drum pressure is increased to 0.3MPa to 0.5MPa, the mold temperature is increased to 140℃ to 160℃, and the heat and pressure holding time is 50s to 100s.

[0023] In the second stage, the internal expansion drum pressure is increased to 0.8MPa to 1.5MPa, the mold temperature is increased to 170℃ to 190℃, and the heat and pressure holding time is 300s to 600s.

[0024] The third stage involves cooling and depressurizing until the pressure is below 0.2 MPa and the temperature is below 100℃.

[0025] A molded antistatic multi-wedge tape includes: a back rubber knurled layer, a back canvas layer, an adhesive layer, a cord skeleton layer, a wedge tooth rubber layer, and a wedge surface conductive canvas layer that are vulcanized and bonded together from the outside to the inside.

[0026] The wedge-shaped conductive canvas layer is made of warp-knitted nylon canvas, and the warp-knitted nylon canvas has continuously arranged conductive filaments embedded in it, forming a continuous conductive network.

[0027] The outer surface of the rubber knurled layer on the back is provided with evenly distributed hemispherical dot-like protrusions, which form heat dissipation channels between the protrusions.

[0028] As a preferred embodiment of the present invention, the knurled rubber layer on the back is made of ethylene propylene diene monomer (EPDM) rubber with a Shore A hardness of 80SHA to 86SHA, a tensile strength ≥10MPa, and an elongation at break ≥200%.

[0029] The thickness of the knurled rubber layer on the back is 0.5mm to 1.2mm, the height of the hemispherical dot-like protrusions is 0.3mm to 0.8mm, and the spacing between the protrusions is 1.0mm to 2.0mm.

[0030] As a preferred embodiment of the present invention, the cord skeleton layer is made of high-modulus polyester cord or aramid cord, with a cord diameter of 0.65mm to 1.1mm and a breaking strength ≥400N; the cords are evenly distributed along the circumference of the drum, with a distribution density of 20 to 26 cords / 25mm.

[0031] As a preferred embodiment of the present invention, the wedge-shaped conductive canvas layer is made of cotton yarn and spandex, with a thickness of 1.00 mm to 1.50 mm;

[0032] The conductive wire is made of nylon-based composite zinc material with a linear density of 50D. The conductive wire is continuously arranged along the weft direction of the canvas with a weft spacing of 0.4mm to 0.6mm and an embedding depth of one-third to one-half of the canvas thickness.

[0033] The beneficial effects of this invention are: by embedding conductive wires inside the wedge-shaped canvas to form a conductive path, triboelectric static charge can be quickly discharged, solving the hidden dangers of electrostatic adsorption and signal interference; the conductive wire structure is set outside the rubber substrate, eliminating the need to fill the rubber with conductive carbon black, thus not affecting the original physical properties of the rubber and improving the belt's flexural performance; the wedge tooth structure is formed by vulcanization molding, resulting in high meshing precision with the pulley and improving transmission stability. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the wedge band structure of the present invention;

[0035] Figure 2 This is a flowchart illustrating the manufacturing steps of the wedge belt of the present invention;

[0036] In the diagram: 1. Knurled rubber layer on the back; 2. Canvas layer on the back; 3. Adhesive layer; 4. Cord skeleton layer; 5. Wedge-tooth rubber layer; 6. Wedge-face conductive canvas layer. Detailed Implementation

[0037] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1

[0039] like Figure 1 As shown, a molded antistatic multi-wedge tape comprises, from the outside to the inside, a back rubber knurled layer 1, a back canvas layer 2, an adhesive layer 3, a cord skeleton layer 4, a wedge tooth rubber layer 5, and a wedge surface conductive canvas layer 6, which are vulcanized and bonded together in sequence.

[0040] In this embodiment, the knurled rubber layer 1 on the back is made of ethylene propylene diene monomer (EPDM) rubber with a Shore A hardness of 80SHA to 86SHA, a tensile strength ≥10MPa, and an elongation at break ≥200%. The thickness of the knurled rubber layer 1 is 0.5mm to 1.2mm, and its surface is provided with uniformly distributed hemispherical dot-shaped protrusions with a protrusion height of 0.3mm to 0.8mm and a protrusion spacing of 1.0mm to 2.0mm. The knurled rubber layer 1 on the back is vulcanized and bonded to the back canvas layer 2, with the outer side serving as the working surface for the belt drive. The knurled rubber layer 1 on the back protects the internal rope skeleton and enables the belt drive function on the back; the dot-shaped protrusions absorb vibrations from the pulley system, and the gaps between the protrusions form heat dissipation channels, reducing operating temperature and extending the service life of the rubber.

[0041] In this embodiment, the back canvas layer 2 is made of nylon 66 elastic canvas with a warp tensile strength ≥2000N / 5cm, a weft tensile strength ≥1500N / 5cm, and a thickness of 0.20mm to 0.35mm. The back canvas layer 2 is vulcanized and bonded to the back rubber knurled layer 1, and the inner side is vulcanized and bonded to the adhesive layer 3. The back canvas layer 2 is used to improve the lateral tear resistance of the belt, suppress lateral deformation, protect the rope skeleton, and prevent the rope from peeling off from the rubber layer.

[0042] In this embodiment, the adhesive layer 3 is EPDM adhesive with a Shore A hardness of 60HA to 75HA. The adhesive completely encapsulates the rope skeleton layer 44 to eliminate the interfacial tension between the rope and the rubber layer, preventing the rope from pulling out and the layers from peeling off during belt operation.

[0043] In this embodiment, the cord skeleton layer 4 is a high-modulus polyester cord or aramid cord with a diameter of 0.65mm to 1.1mm and a breaking strength ≥400N. The cords are evenly distributed along the circumference of the belt drum, with a density of 20 to 26 cords / 25mm. The cord skeleton layer 4 is completely enclosed within the adhesive layer 3 and is bonded to the inner and outer layers by vulcanization with the adhesive. The cord skeleton layer 4 serves as the load-bearing skeleton of the belt, bearing the tensile tension during transmission.

[0044] In this embodiment, the wedge-tooth rubber layer 5 is made of EPDM rubber with a Shore A hardness of 70HA to 80HA, exhibiting good heat aging resistance. The wedge-tooth rubber layer 5 is formed into a standard multi-wedge tooth shape through one-time molding, and is vulcanized and bonded to the wedge-surface conductive canvas layer 6. The other side is vulcanized and bonded to the adhesive layer 3, forming a stable wedge-shaped transmission structure to ensure the meshing accuracy with the pulley, while also providing a buffering and shock absorption function.

[0045] In this embodiment, the wedge-shaped conductive canvas layer 6 is made of cotton yarn and spandex, with a thickness of 1.00 mm to 1.50 mm, a warp tensile strength ≥2200 N / 5 cm, and a weft tensile strength ≥1800 N / 5 cm. Conductive wires are oriented and embedded within the warp-knitted structure of the canvas. These conductive wires are made of nylon-based zinc composite material with a linear density of 50 D, continuously arranged along the weft direction of the canvas with a weft spacing of 0.4 mm to 0.6 mm, and an embedding depth of one-third to one-half the canvas thickness. One side of the wedge-shaped conductive canvas layer 6 is the main drive surface of the belt, directly contacting the pulley; the other side is vulcanized and bonded to the wedge tooth rubber layer 5. The wedge-shaped conductive canvas layer 6 serves as the main drive surface, transmitting power through contact with the pulley. Simultaneously, the continuous conductive network formed by the internal conductive wires discharges static charges generated by friction, and prevents direct friction and wear between the rubber and the pulley, thus preventing wedge tooth deformation or cracking and improving belt lifespan.

[0046] Example 2

[0047] like Figure 2 As shown, a method for manufacturing a molded antistatic multi-wedge tape includes the following steps:

[0048] S1. Inspect raw materials such as rubber, textile materials, ropes and conductive wires, and remove unqualified products;

[0049] S2, Manufacturing a wedge-shaped conductive canvas layer with embedded conductive wires 6;

[0050] S3. Prepare the compound of back rubber, adhesive and wedge rubber;

[0051] S4. Layers of structure are sequentially wrapped around the forming drum to form a belt tube;

[0052] S5. Place the strip into the mold for vulcanization to form the wedge teeth in one step;

[0053] S6. Cut, inspect, and package the vulcanized strip.

[0054] In step S1, the raw materials for rubber, textiles, ropes, and conductive wires are inspected, and unqualified products are removed. This includes the following steps:

[0055] S101. Inspect the Mooney viscosity, ash content, and purity of rubber raw materials.

[0056] The raw materials for rubber are inspected, including EPDM raw rubber, vulcanizing agents, accelerators, reinforcing agents, and softeners. The inspection items include Mooney viscosity, ash content, and purity. The qualified raw materials are selected, and the unqualified raw materials are rejected.

[0057] S102. Inspect the thickness, breaking strength and density of textile materials;

[0058] The textile materials are inspected, including the back canvas and the wedge canvas base. The inspection items include thickness, breaking strength, density, and shrinkage rate. Textile materials that pass the inspection are selected, and those that fail the inspection are rejected.

[0059] S103. Inspect the diameter and breaking strength of the rope;

[0060] The ropes are inspected, and their diameter, breaking strength, elongation at a given load, and twist are tested. Ropes that pass the tests are selected, and those that fail are rejected.

[0061] S104. Inspect the diameter and volume resistivity of the conductive wire.

[0062] The conductive wires are inspected, including their diameter, breaking strength, and volume resistivity. Wires that pass the tests are selected, while those that fail are discarded.

[0063] In step S2, the wedge-shaped conductive canvas layer 6 with embedded conductive wires is manufactured, including the following steps:

[0064] S201. Using a warp knitting machine, conductive filaments are continuously woven into nylon fibers along the weft direction of the canvas to form a canvas base.

[0065] A double-needle bed warp knitting machine is used to simultaneously feed nylon fibers and conductive filaments into the knitting system. The conductive filaments are continuously woven into the nylon fibers along the weft direction of the canvas to form the canvas base.

[0066] During the weaving process, the feeding tension of the conductive wire is 5cN to 15cN. At the same time, the conductivity of the conductive wire is monitored, and if a wire breaks, the machine is stopped.

[0067] S202. Control the weft spacing of the conductive wires according to the required surface resistance of the canvas.

[0068] Based on the surface resistance of the canvas, the spacing of the conductive wires is controlled using the following expression:

[0069]

[0070] In the above formula, The surface resistance of the canvas. ρ is the linear resistivity of the conductive wire. The effective distance between electrodes. This represents the latitudinal spacing between adjacent conductive wires. This represents the number of conductive wires. In this embodiment, The value ranges from 0.0005m to 0.002m.

[0071] S203. Perform constant tension heat setting treatment on the woven canvas;

[0072] The woven canvas is fed into a setting machine for constant tension heat setting treatment. The setting temperature is 160℃ to 180℃, the setting time is 60s to 120s, and the warp tensile tension of the canvas is controlled at 100N / 5cm to 200N / 5cm.

[0073] S204. Immerse the canvas in the dyeing vat for dyeing and then perform gradient drying.

[0074] The heat-set canvas is immersed in a dye vat for dyeing for 10 to 20 seconds.

[0075] After dyeing, the products are sent to a drying oven for two-stage gradient drying. The first stage of drying is at a temperature of 100℃ to 120℃ for 20 to 30 seconds, and the second stage is at a temperature of 140℃ to 160℃ for 30 to 40 seconds.

[0076] In step S3, the compound of back rubber, adhesive, and wedge-tooth rubber is prepared, including the following steps:

[0077] S301. Weigh the raw materials required for each rubber compound;

[0078] Weigh out the raw rubber, vulcanizing agent, accelerator, reinforcing agent, and softener for the back rubber, adhesive, and wedge-tooth rubber respectively. Store the vulcanizing agent and accelerator separately at low temperature and seal them after weighing.

[0079] S302. Two-stage mixing is carried out using an internal mixer and a two-stage mill.

[0080] The mixture is mixed in one stage using an internal mixer. Raw rubber, reinforcing agent, and softener are added first. The mixing temperature is controlled at 110℃ to 130℃, the mixing time is 8 min to 12 min, and the discharge temperature is ≤135℃.

[0081] After the first stage of mixing, the sheets are cooled and left to stand for 4 to 8 hours before the second stage of open milling. Vulcanizing agent and accelerator are added to the open mill, and the temperature of the open mill rolls is controlled at 40°C to 60°C.

[0082] S303. The compounded rubber is calendered into a sheet of a predetermined thickness using an extruder and a calender.

[0083] The mixed rubber compound is pre-extruded using a cold-feed extruder and then calendered into a sheet of preset thickness using a four-roll calender. During the calendering process, a laser thickness gauge is used to monitor the sheet thickness. If the monitored thickness does not meet the preset requirements, the machine is stopped and the equipment is inspected.

[0084] In step S4, the layers are sequentially coated onto the forming drum to form a belt, including the following steps:

[0085] S401. Install and adjust the forming drum and unwinding equipment;

[0086] Install the forming drum onto the CNC forming machine and adjust the parameters of the forming drum to match the target product.

[0087] Install each film, canvas, and rope onto the corresponding unwinding frame and adjust the unwinding tension.

[0088] S402, sequentially cover the back rubber knurled layer 1, the back canvas layer 2, the adhesive layer 3, the cord skeleton layer 4, the wedge tooth rubber layer 5, and the wedge surface conductive canvas layer 6.

[0089] The following layers are sequentially applied to the molding drum: a back rubber knurled layer 1, a back canvas layer 2, an adhesive layer 3, a cord skeleton layer 4, a wedge-tooth rubber layer 5, and a wedge-surface conductive canvas layer 6.

[0090] S403. Perform circumferential pre-compression and vacuum evacuation on the wrapped tape.

[0091] After the coating is completed, the tape is pre-pressed circumferentially using a silicone roller. The pressing pressure is 0.3MPa to 0.5MPa and the pressing speed is 5m / min to 10m / min. At the same time, the tape is vacuumed to remove residual air between layers.

[0092] In step S5, the strip is placed into the mold for vulcanization to form the wedge teeth in one step, including the following steps:

[0093] S501. Preheat the vulcanizing mold and spray with release agent;

[0094] The vulcanizing mold includes an inner expansion drum and an outer mold sleeve. The inner wall of the outer mold sleeve is machined with wedge-shaped cavities corresponding to the tooth shape of the product. The mold material is 45# steel or mold steel. When using it, the mold is first preheated to 100°C to 120°C with heat transfer oil. Silicon-based water-based release agent is evenly sprayed on the inner surface of the mold.

[0095] S502. Insert the sleeve into the inner expansion drum and close and lock the mold.

[0096] The formed strip is evenly inserted into the inner expansion drum, the mold is closed and the outer mold sleeve is locked, and the coaxiality of the mold is improved by the positioning pin to avoid the product being eccentric or the tooth shape being asymmetrical after vulcanization.

[0097] S503, perform staged gradient temperature and pressure vulcanization;

[0098] A phased, gradient heating and pressurization process is employed to prevent uneven rubber flow that could lead to missing rubber in the toothed section. Specifically, this includes:

[0099] In the preforming stage, i.e. the first stage, compressed air is injected into the internal expansion drum, the pressure rises to 0.3MPa to 0.5MPa, the temperature of the mold heat transfer oil rises to 140℃ to 160℃, and the heat preservation and pressure holding time is 50s to 100s, so that the rubber material is initially softened and flows.

[0100] During the vulcanization and cross-linking stage, i.e. the second stage, the pressure of the inner expansion drum is increased to 0.8MPa to 1.5MPa, the mold temperature is increased to 170℃ to 190℃, and the heat preservation and pressure holding time is 300s to 600s, so that the rubber can be fully vulcanized and cross-linked. At the same time, the rubber material is completely pressed into the cavity through high pressure.

[0101] During the cooling and shaping stage, also known as the third stage, the temperature of the heat transfer oil is gradually reduced while the pressure is slowly released, with the internal pressure dropping below 0.2 MPa and the temperature dropping below 100°C.

[0102] During the vulcanization process, the dimensional accuracy of the wedge teeth is controlled using the following expression:

[0103]

[0104] In the above formula, For wedge tooth size deviation, This refers to the actual height of the wedge teeth after vulcanization. The design height of the wedge teeth is specified. By adjusting the vulcanization pressure, temperature, and holding time, the dimensional deviation of the wedge teeth is ensured to be ≤0.02mm.

[0105] In step S6, the vulcanized strip is cut, inspected, and packaged, including the following steps:

[0106] S601, the sleeve is removed from the mold after cooling;

[0107] After vulcanization, the strip tube is cooled to below 60°C along with the mold before the mold is opened and the product is demolded to avoid thermal shrinkage and deformation caused by high-temperature demolding.

[0108] S602. Cut the wedge strip to the specified width and trim the end face;

[0109] After demolding, the strip is installed on a CNC cutting machine and cut according to the product width. The cutting tool is a carbide disc cutter, and the cutting speed is 50mm / s to 150mm / s. The end face of the cut product is then polished to remove burrs and flash.

[0110] S603. Conduct appearance inspection, dimensional inspection, surface resistance testing, and physical performance sampling inspection, and reject unqualified products;

[0111] Visual inspection is conducted on the product surface. The inspection items include whether there are cracks, bubbles, or exposed lines. If there are no cracks, bubbles, or exposed lines, the product is qualified and proceeds to the next step of inspection. Otherwise, the product is unqualified and is rejected.

[0112] Dimensional inspection is performed using a laser diameter gauge to measure the product dimensions, including circumference, width, wedge tooth height, pitch, etc. If all measured items are within their corresponding standard ranges, the product dimensions are qualified and the next inspection step is performed; otherwise, the product is unqualified and is rejected.

[0113] Surface resistance testing is performed using a four-probe surface resistance tester to test the working surface of each product. There are no fewer than five test points. If the resistance at all test points is within the standard resistance range, the product is qualified and proceeds to the next step of testing. Otherwise, the product is unqualified and is rejected.

[0114] Physical performance testing is conducted. Several products are randomly selected from each batch for testing of interlayer bond strength, cord pull-out force, and flexural fatigue performance. If the interlayer bond strength, cord pull-out force, and flexural fatigue performance of all sampled products meet the corresponding standard range, the products are qualified and the batch is put into storage. If one or more sampled products fail to meet the interlayer bond strength, cord pull-out force, or flexural fatigue performance standards, the batch is sorted to the retesting area.

[0115] In the re-inspection area, each product in the batch will be inspected; qualified products will be put into storage, and unqualified products will be rejected.

[0116] S604. Qualified products shall be packaged with moisture-proof materials and put into storage.

[0117] Products that pass inspection are wrapped with moisture-proof film, labeled with product model, specifications, batch number, production date, etc., and then stored in a cool, dry warehouse with a temperature of 5°C to 35°C and a relative humidity of 30% to 80%.

[0118] This invention creates a conductive path by embedding conductive wires within the wedge-shaped canvas, which can quickly discharge triboelectric static charge and solve potential problems such as electrostatic adsorption and signal interference. The conductive wire structure is located outside the rubber substrate, eliminating the need to fill the rubber compound with conductive carbon black, thus not affecting the original physical properties of the rubber compound and improving the belt's flexural performance. The wedge tooth structure is formed by vulcanization molding, resulting in high meshing precision with the pulley and improving transmission stability.

[0119] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Clearly, those skilled in the art can make various alterations and variations to the invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of equivalents of the invention, the invention is also intended to include these modifications and variations.

Claims

1. A method for manufacturing a molded antistatic multi-wedge tape, characterized in that, Includes the following steps: S1. Inspect raw materials such as rubber, textile materials, ropes and conductive wires, and remove unqualified products; S2. Manufacturing a wedge-shaped conductive canvas layer with embedded conductive wires; S3. Prepare the compound of back rubber, adhesive and wedge rubber; S4. Layers of structure are sequentially wrapped around the forming drum to form a belt tube; S5. Place the strip into the mold for vulcanization to form the wedge teeth in one step; S6. Cut, inspect, and package the vulcanized strip.

2. The manufacturing method of a molded antistatic multi-wedge tape according to claim 1, characterized in that, S2 includes the following steps: S201. Using a warp knitting machine, conductive filaments are continuously woven into nylon fibers along the weft direction of the canvas to form a canvas base. S202. Control the weft spacing of the conductive wires according to the required surface resistance of the canvas. S203. Perform constant tension heat setting treatment on the woven canvas; S204. Immerse the canvas in a dyeing vat for dyeing and then perform gradient drying.

3. The manufacturing method of a molded antistatic multi-wedge tape according to claim 2, characterized in that, In S202, the weft spacing of the conductive wires is controlled based on surface resistance, as expressed below: In the above formula, The surface resistance of the canvas. ρ is the linear resistivity of the conductive wire. The effective distance between electrodes. This represents the latitudinal spacing between adjacent conductive wires. This represents the number of conductive wires.

4. The manufacturing method of a molded antistatic multi-wedge tape according to claim 2, characterized in that, In S204, two-stage gradient drying is carried out. The first stage drying temperature is 100℃ to 120℃ and the time is 20s to 30s. The second stage drying temperature is 140℃ to 160℃ and the time is 30s to 40s.

5. The manufacturing method of a molded antistatic multi-wedge tape according to claim 1, characterized in that, In S5, a phased gradient temperature and pressure vulcanization process is performed, including: In the first stage, the internal expansion drum pressure is increased to 0.3MPa to 0.5MPa, the mold temperature is increased to 140℃ to 160℃, and the heat and pressure holding time is 50s to 100s. In the second stage, the internal expansion drum pressure is increased to 0.8MPa to 1.5MPa, the mold temperature is increased to 170℃ to 190℃, and the heat and pressure holding time is 300s to 600s. The third stage involves cooling and depressurizing until the pressure is below 0.2 MPa and the temperature is below 100℃.

6. A molded antistatic multi-wedge tape, applicable to the manufacturing method of the molded antistatic multi-wedge tape according to any one of claims 1-5, characterized in that, include: From the outside to the inside, the back rubber knurled layer, the back canvas layer, the adhesive layer, the cord skeleton layer, the wedge-tooth rubber layer, and the wedge-face conductive canvas layer are vulcanized and bonded together as one piece. The wedge-shaped conductive canvas layer is made of warp-knitted nylon canvas, and the warp-knitted nylon canvas has continuously arranged conductive filaments embedded in it, forming a continuous conductive network. The outer surface of the rubber knurled layer on the back is provided with evenly distributed hemispherical dot-like protrusions, which form heat dissipation channels between the protrusions.

7. The molded antistatic multi-wedge tape according to claim 6, characterized in that, The knurled rubber layer on the back is made of EPDM rubber with a Shore A hardness of 80SHA to 86SHA, tensile strength ≥10MPa, and elongation at break ≥200%. The thickness of the knurled rubber layer on the back is 0.5mm to 1.2mm, the height of the hemispherical dot-like protrusions is 0.3mm to 0.8mm, and the spacing between the protrusions is 1.0mm to 2.0mm.

8. The molded antistatic multi-wedge tape according to claim 6, characterized in that, The cord skeleton layer is made of high-modulus polyester cord or aramid cord with a cord diameter of 0.65mm to 1.1mm and a breaking strength of ≥400N. The cords are evenly distributed along the circumference of the drum with a density of 20 to 26 cords / 25mm.

9. A molded antistatic multi-wedge tape according to claim 6, characterized in that, The wedge-shaped conductive canvas layer is made of cotton yarn and spandex, with a thickness of 1.00 mm to 1.50 mm; The conductive wire is made of nylon-based zinc composite material with a linear density of 50D; The conductive wires are continuously arranged along the weft direction of the canvas, with a weft spacing of 0.4 mm to 0.6 mm and an embedding depth of one-third to one-half of the canvas thickness.

Images