Aramid rope core conveyor belt and its manufacturing process

Abstract

This invention discloses an aramid rope core conveyor belt and its manufacturing process, belonging to the field of conveyor belt technology. The manufacturing process includes: surface treatment of the aramid rope with a silane coupling agent, followed by sequential mixing of core rubber and cover rubber; arranging the treated aramid rope at a set interval while maintaining tension, first filling with core rubber to form a base layer, then calendering the cover rubber compound; and finally vulcanizing and shaping using a flat vulcanizing machine. Compared with existing technologies, the unique interface design of this invention enables the conveyor belt to maintain structural integrity under harsh conditions such as high temperature, high load, and repeated flexing, significantly extending its service life and reducing maintenance frequency and operating costs due to interface failure, thus possessing significant industrial application value.

Description

Technical Field

[0001] This invention relates to the field of conveyor belt technology, and in particular to an aramid rope core conveyor belt and its manufacturing process. Background Technology

[0002] Aramid rope core conveyor belts, as an important branch of high-performance conveyor belts, are widely used in heavy-duty transportation fields such as mining and ports due to their excellent properties such as lightweight, high strength, and fatigue resistance. The core technology lies in solving the interfacial adhesion problem between the aramid rope and the rubber matrix, ensuring a long service life under complex working conditions. In recent years, researchers at home and abroad have conducted in-depth explorations in areas such as adhesive system design, interface modification, and structural optimization, promoting continuous progress in this field.

[0003] Among existing technical solutions, researchers have proposed several innovative approaches. Chinese Patent Publication No. CN116333638A uses a cobalt salt compounded with amphiphilic hyperbranched polyester and a silane coupling agent to form an adhesive system. The three-dimensional structure of the hyperbranched polymer enhances the interfacial anchoring effect, maintaining the bonding strength between the steel wire rope and rubber while reducing the amount of cobalt salt required. Chinese Patent Publication No. CN110218533A designs a core adhesive capable of simultaneously bonding metal and fiber materials, achieving cross-material bonding through the synergistic effect of a cobalt boroyl metal adhesive, a methyl methacrylate system between fiber adhesives, and a polar adhesive. Chinese Patent Publication No. CN117681515A focuses on flame retardancy and environmental performance, achieving a balance between flame retardancy and mechanical properties through a blend of chloroprene rubber / chlorinated polyethylene and a molybdenum-based flame retardant. However, these technologies suffer from limitations such as complex formulations leading to difficult process control, and an overemphasis on flame retardancy at the expense of interfacial durability.

[0004] The main problem facing current technological development is that existing solutions are mostly limited to improving single performance aspects or specific application scenarios, failing to systematically address the interface failure challenge of aramid cord conveyor belts under combined stresses of high temperature, high load, and dynamic flexural bending. Functional design often comes at the cost of sacrificing mechanical performance. The industry urgently needs a comprehensive solution that balances strong adhesion, high durability, and process feasibility to overcome the technical bottlenecks in interface synergistic strengthening, long service life, and engineering applications, thereby meeting the growing demand of modern industry for high-performance conveyor belts. Summary of the Invention

[0005] To address the problems of insufficient interfacial bonding strength and poor durability between aramid rope and rubber matrix in existing technologies, this invention aims to provide a high-performance aramid rope core conveyor belt and its preparation process, which utilizes an organometallic complex to construct a multi-layered synergistic bonding system.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] The manufacturing process of an aramid rope core conveyor belt is as follows:

[0008] Step 1: Add silane coupling agent KH550 to an ethanol-water solution to prepare a mixture. Adjust the pH with hydrochloric acid, impregnate the aramid rope, and then dry and cure it. Plasticize natural rubber and styrene-butadiene rubber, then add resorcinol, hexamethylenetetramine, silica, carbon black N330, and paraffin oil in sequence and mix. After discharge, cool to room temperature and let stand. Add sulfur, accelerator CZ, and organometallic complex to the above-mentioned masterbatch and mix. After discharge, press into sheets, cool and let stand to make the core rubber. Put EPDM rubber and EPDM rubber into a mixer, then add carbon black N550, paraffin oil, and antioxidants and mix. After discharge, cool to room temperature and let stand. Add sulfur, accelerator BZ, and accelerator TMTD to the stand-up masterbatch, mix, discharge, press into sheets, cool and let stand to make the cover rubber.

[0009] Step 2: Arrange the aramid ropes evenly and maintain tension. First, fill the gaps between the aramid ropes with core adhesive. Then, cover the top and bottom of the filled base layer with cover adhesive and compact it to obtain the composite strip blank.

[0010] Step 3: Place the composite belt blank in a flat vulcanizing machine for vulcanization. After vulcanization, trim the edges and cool to obtain the aramid rope core conveyor belt.

[0011] Preferably, the manufacturing process of the aramid cord conveyor belt is as follows, in parts by weight:

[0012] Step 1: Add silane coupling agent KH550 to a 60-75wt% ethanol aqueous solution to prepare a 1-3% (w / w) mixture. Adjust the pH to 4-6 using 0.5-2mol / L hydrochloric acid. Impregnate the aramid rope with this solution, and then dry and cure it at 80-100℃ for 1-5 hours. Plasticize 30-60 parts of natural rubber and 30-70 parts of styrene-butadiene rubber at 70-85℃ for 0.5-3 minutes. Then, sequentially add 1-5 parts of resorcinol, 1-3 parts of hexamethylenetetramine, 5-20 parts of silica, and N330 carbon black. Mix 20-50 parts of EPDM rubber and 5-10 parts of paraffin oil at 75-90℃ for 5-15 minutes to ensure uniform dispersion of fillers. After discharge, spread the masterbatch on an iron plate, cool to room temperature, and let it stand for 2-6 hours. Put the rested masterbatch back into the internal mixer, add 1-5 parts of sulfur, 0.5-2 parts of accelerator CZ, and 0.5-2 parts of organometallic complex, and mix at 70-85℃ for 1-5 minutes. After discharge, press into sheets, cool, and let stand for 1-5 hours to make the core rubber. Put 50-80 parts of EPDM rubber and 20-40 parts of EPDM rubber into the internal mixer, and then add carbon black N550. Mix 20-40 parts of paraffin oil, 5-20 parts of paraffin oil, and 1-3 parts of antioxidant at 100-120℃ for 3-15 minutes. After degassing, spread out and cool to room temperature. Let stand for 1-10 hours. Put the rested cover masterbatch into an internal mixer, add 1-3 parts of sulfur, 0.5-2 parts of accelerator BZ, and 0.1-0.5 parts of accelerator TMTD. Control the temperature at 70-90℃ and mix for 1-5 minutes. Degas and press into sheets. After cooling and standing for 1-5 hours, the cover masterbatch is made.

[0013] Step 2: Arrange the aramid ropes evenly and maintain tension. First, fill the gaps between the aramid ropes with core adhesive. Then, cover the top and bottom of the filled base layer with cover adhesive. Compact the core adhesive with a calender to ensure no air bubbles, and obtain the composite strip blank.

[0014] Step 3: Place the composite belt blank in a flat vulcanizing machine for vulcanization. After vulcanization, trim the edges and cool it to room temperature with water to obtain the aramid rope core conveyor belt.

[0015] In step 2, the aramid ropes are evenly arranged and kept under tension of 200-300N with a spacing of p=8-15mm.

[0016] In step 2, the filling thickness of the core adhesive is consistent with the diameter of the aramid rope.

[0017] In step 3, vulcanization is carried out at a temperature of 140-180℃ and a pressure of 1-2MPa for 20-50 minutes.

[0018] In step 3, the thickness of the aramid rope core conveyor belt is t=17.5-25.5mm, the thickness of the upper cover rubber is t1=6-10mm, the thickness of the lower cover rubber is t2=6-10mm, the width is b=43-76mm, the center distance between the outermost two ends of the aramid rope is b1=32-60mm, and the width of the edge rubber is b2=5.5-8mm.

[0019] The organometallic complex is at least one of cobalt neodecanoate, iron acetylacetone, zinc isooctanoate, cerium naphthenate, nickel dibutyldithiocarbamate, copper stearate, aluminum acetylsalicylate, and lanthanum stearate.

[0020] Preferably, the organometallic complex is composed of cerium naphthenate and nickel dibutyldithiocarbamate in a mass ratio of 0.5-2:0.5-2.

[0021] More preferably, the organometallic complex is composed of cerium naphthenate, nickel dibutyldithiocarbamate, and lanthanum stearate in a mass ratio of 0.5-2:0.5-2:0.1-0.3.

[0022] This invention addresses the industry challenge of aramid-rubber interfacial adhesion mechanism through in-depth analysis and a multi-level synergistic strengthening strategy. Its core lies in overcoming the limitations of traditional single adhesion promoters by constructing a progressive synergistic system encompassing molecular-level coordination anchoring, interfacial crosslinking optimization, and three-dimensional network protection. This system systematically solves the problem of easy interfacial failure between aramid ropes and rubber matrices under high temperatures and dynamic loads. Firstly, organometallic complexes are introduced as key functional components. By precisely screening the properties of different metal ions, targeted enhancement and complementarity of interfacial performance are achieved.

[0023] Furthermore, cerium naphthenate provides a strong coordination anchoring basis, utilizing its 4f electron layer characteristics to form coordination bonds with the aramid surface. Simultaneously, nickel dibutyldithiocarbamate is used as an interfacial vulcanization regulator to precisely control the crosslinking kinetics of the aramid-rubber interface region, forming a gradient-transition crosslinking network to disperse stress. Even further, lanthanum stearate is introduced to construct a ternary synergistic system. Through the stronger coordination ability and Lewis acidity of lanthanum ions, it both supplements the anchoring density and catalyzes the crosslinking reaction, forming a multidimensional synergistic effect with the free radical scavenging function of cerium and the network regulation function of nickel.

[0024] This design approach achieves a leapfrog improvement in interfacial durability through a progressive path of single-component basic reinforcement, two-component functional synergy, and ternary system optimization. Experimental data fully validates the effectiveness of this approach, improving adhesive strength retention and flexural life significantly compared to traditional methods. This invention not only provides a method for preparing high-performance aramid cord core conveyor belts but also pioneers a new approach to optimizing the interfacial properties of composite materials through the combination of metal ion characteristics, providing an innovative solution for the long life and high reliability requirements of high-end conveyor belts.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] 1) By constructing a multi-layered synergistic bonding system, the present invention forms a stable chemical bond and physical anchoring effect between the aramid rope and the rubber matrix, which significantly enhances the interfacial bonding force and effectively solves the delamination and rope pull-out phenomena that are common in traditional conveyor belts.

[0027] 2) The unique interface design of this invention enables the conveyor belt to maintain its structural integrity under harsh conditions such as high temperature, high load and repeated bending, which greatly extends its service life and reduces the frequency of maintenance and operating costs caused by interface failure.

[0028] 3) While improving overall performance, this invention cleverly balances material compatibility and process parameters, ensuring that the excellent bonding effect does not depend on harsh preparation conditions, and has good industrialization feasibility and adaptability. Attached Figure Description

[0029] Figure 1 This is a model dimension drawing of the aramid rope core conveyor belt prepared according to the present invention. Detailed Implementation

[0030] Some material parameters and their sources:

[0031] Aramid rope, diameter 5.5mm, 3300DTEX / 2*3*6, twist 50TPM, breaking strength greater than 20000N.

[0032] Silane coupling agent KH550, brand name: Silquest A-1100, brand: Momentive (USA).

[0033] Natural rubber, SMR20 standard rubber, origin: Malaysia.

[0034] Styrene-butadiene rubber, grade: Buna SB 1500, brand: LANXESS.

[0035] Hexamethylenetetramine, grade: H11300, brand: Merck, Germany.

[0036] Silica, grade: Ultrasil VN3, brand: Evonik.

[0037] Carbon black N330, grade: Vulcan 3, brand: Cabot.

[0038] Paraffin oil, grade: FLEXON 660, brand: ESSO.

[0039] Accelerator CZ, brand name: Vulkacit® CZ, brand: LANXESS.

[0040] EPDM rubber, grade: Keltan® 8550C, brand: LANXESS.

[0041] Ethylene propylene diene monomer (EPDM) rubber, grade: VistalonT™ 722, brand: ExxonMobil.

[0042] Carbon black N550, grade: N550, brand: Cabot.

[0043] Antioxidant, brand name: Irganox® 1520 L, brand: BASF.

[0044] Accelerator BZ, product number: Z830889, Shanghai McLean Biochemical Technology Co., Ltd.

[0045] Accelerator TMTD, model: Vulkacit Thiuram / C, brand: LANXESS.

[0046] All other raw materials used in the embodiments and comparative examples of this invention are commercially available products.

[0047] Example 1

[0048] The manufacturing process of an aramid rope core conveyor belt is as follows, in parts by weight:

[0049] Step 1: Add silane coupling agent KH550 to a 70wt% ethanol aqueous solution to prepare a 2% (w / w) mixture. Adjust the pH to 5 using 1mol / L hydrochloric acid. Impregnate the aramid rope with this solution, then dry and cure at 100℃ for 2 hours. Add 50 parts natural rubber and 50 parts styrene-butadiene rubber to a mixer and plasticize at 80℃ for 1 minute. Then, add 3 parts resorcinol, 2 parts hexamethylenetetramine, 12 parts silica, 40 parts carbon black N330, and 8 parts paraffin oil sequentially. Mix at 85℃ for 10 minutes to ensure uniform dispersion of the fillers. After discharge, spread the masterbatch on an iron plate, cool to room temperature, and let it stand for 4 hours. Return the rested masterbatch to the mixer, add 2.5 parts sulfur and accelerator CZ. 1.2 parts of EPDM rubber and 1 part of organometallic complex were mixed at 80°C for 2 minutes. After discharge, the mixture was pressed into sheets and cooled for 2 hours to make the core rubber. 70 parts of EPDM rubber and 30 parts of EPDM rubber were put into an internal mixer. Then, 30 parts of carbon black N550, 12 parts of paraffin oil and 2 parts of antioxidant were added. The mixture was mixed at 110°C for 10 minutes. After discharge, the mixture was spread out and cooled to room temperature and left for 6 hours. The left-ground cover masterbatch was put into an internal mixer. 1.8 parts of sulfur, 1.0 part of accelerator BZ and 0.3 parts of accelerator TMTD were added. The mixture was mixed at 80°C for 3 minutes. After discharge, the mixture was pressed into sheets and cooled for 2 hours to make the cover rubber.

[0050] Step 2: Arrange the aramid ropes evenly at a spacing of p=11mm and maintain a tension of 250N. First, fill the gaps between the aramid ropes with core adhesive, with the filling thickness consistent with the diameter of the aramid rope, so that the core adhesive covers the rope body and forms a flat base layer. Then, cover the top and bottom of the filled base layer with cover adhesive, and compact it with a calender to ensure no air bubbles, thus obtaining the composite strip blank.

[0051] Step 3: Place the composite belt blank in a flat vulcanizing machine and vulcanize for 45 minutes at a temperature of 160℃ and a pressure of 1.5MPa. After vulcanization, trim the edges and cool to room temperature with water at 25℃. The final belt thickness is t=21.5mm, the upper cover rubber thickness is t1=8mm, the lower cover rubber thickness is t2=8mm, the width is b=55mm, the center distance between the outermost two aramid ropes is b1=44mm, and the edge rubber width is b2=5.5mm, thus obtaining the aramid rope core conveyor belt.

[0052] The organometallic complex is cobalt neodecanoate.

[0053] Example 2

[0054] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is iron acetylacetone.

[0055] Example 3

[0056] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is zinc isooctanoate.

[0057] Example 4

[0058] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is cerium naphthenate.

[0059] Example 5

[0060] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is nickel dibutyldithiocarbamate.

[0061] Example 6

[0062] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is copper stearate.

[0063] Example 7

[0064] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is aluminum acetylsalicylate.

[0065] Example 8

[0066] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is composed of cerium naphthenate and nickel dibutyldithiocarbamate in a mass ratio of 1:1.

[0067] Example 9

[0068] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is composed of copper stearate and nickel dibutyldithiocarbamate in a mass ratio of 1:1.

[0069] Example 10

[0070] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is composed of aluminum acetylsalicylate and iron acetylacetone in a mass ratio of 1:1.

[0071] Example 11

[0072] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is composed of cerium naphthenate, nickel dibutyldithiocarbamate and lanthanum stearate in a mass ratio of 1:1:0.2.

[0073] Comparative Example 1

[0074] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is cobalt borate.

[0075] Comparative Example 2

[0076] The preparation process of an aramid rope core conveyor belt is basically the same as that in Example 1, except that the organometallic complex is not added.

[0077] Test Example 1

[0078] High-temperature adhesive strength retention test:

[0079] Referring to the standard GB / T 3512-2014 "Accelerated Aging and Heat Resistance Test of Vulcanized Rubber or Thermoplastic Rubber in Hot Air", the aramid rope core conveyor belts prepared in the embodiments and comparative examples of this invention were placed in a hot air aging chamber at 180°C for 72 hours. After removal and cooling to room temperature, the adhesion strength (H pull-out force) between the aramid rope and the rubber was tested according to the method in GB / T 5755-2021 "Test on Adhesion between Steel Wire Rope Core Conveyor Belt Rope and Covering Rubber". The strength retention rate (%) before and after aging was calculated.

[0080] The test results are shown in Table 1.

[0081] Table 1

[0082] Experimental protocol Adhesion strength retention rate (%) Example 1 86.5 Example 2 72.3 Example 3 78.9 Example 4 84.2 Example 5 76.8 Example 6 68.5 Example 7 70.2 Example 8 91.7 Example 9 74.6 Example 10 71.9 Example 11 93.2 Comparative Example 1 82.4 Comparative Example 2 58.3

[0083] Test Example 2

[0084] Dynamic flexural life test:

[0085] A dynamic flexural testing machine was used. The test method was as follows: the aramid rope core conveyor belts prepared in the embodiments and comparative examples of this invention were subjected to a fixed strain amplitude of 25% and a frequency of 5 Hz, and continuous flexural testing was carried out at room temperature. The number of flexural cycles when the sample showed a crack ≥3 mm or adhesive failure was recorded as the dynamic flexural life.

[0086] The relevant test data are summarized in Table 2.

[0087] Table 2

[0088] Experimental protocol Number of flexion cycles (times) Example 1 125,680 Example 2 89,450 Example 3 98,720 Example 4 118,990 Example 5 132,150 Example 6 76,800 Example 7 82,100 Example 8 158,360 Example 9 94,550 Example 10 87,200 Example 11 168,500 Comparative Example 1 116,400 Comparative Example 2 45,250

[0089] This invention constructs a multi-layered reinforced interface between aramid rope and rubber matrix by introducing specific organometallic complexes. In the single-component metal complexes, the metal ions of cobalt neodecanoate added in Example 1 and cerium naphthenate added in Example 4 combine with the aramid surface, whose surface chemical properties have been partially altered after silane treatment, through coordination. The branched structure of cobalt neodecanoate provides better dispersibility, while the rare earth cerium ions, with their 4f electron layer structure, generate stronger coordination ability, resulting in a better retention rate of adhesive strength than traditional cobalt borylate. In contrast, common metal complexes such as iron acetylacetone have poor performance due to low coordination bond strength and poor thermal stability.

[0090] Example 8 added cerium naphthenate and nickel dibutyldithiocarbamate to improve performance through cerium-nickel synergy. Cerium ions provide strong coordination anchoring, while nickel salt acts as an ultra-accelerator to precisely regulate the interfacial vulcanization kinetics, forming a gradient cross-linking network to effectively disperse dynamic stress. At the same time, the free radical scavenging ability of cerium ions and the optimized dense cross-linking network of nickel salt work together to block oxygen penetration, so that the system still maintains 91.7% adhesion retention and high flexural life at high temperature.

[0091] Example 11 further introduces lanthanum stearate to supplement the anchoring density through the stronger coordination ability of lanthanum ions. The La in lanthanum stearate... 3+ Organonickel salts may synergistically regulate the vulcanization process in the interfacial region, thereby affecting the quality of cross-linked network formation. Combined with the free radical scavenging function of cerium ions, a synergistic effect of coordination, cross-linking, and protection is achieved, ultimately increasing the adhesion retention rate to 93.2% and the flexural life to 168,500 cycles. This indicates that by complementing the properties of metal ions and optimizing the interfacial reaction pathway, the extreme working condition durability of aramid cord conveyor belts can be progressively improved.

Claims

1. A manufacturing process for an aramid rope core conveyor belt, characterized in that, The process is as follows: Step 1: Add silane coupling agent KH550 to an ethanol-water solution to prepare a mixture. Adjust the pH with hydrochloric acid, impregnate the aramid rope, and then dry and cure it. Plasticize natural rubber and styrene-butadiene rubber, then add resorcinol, hexamethylenetetramine, silica, carbon black N330, and paraffin oil in sequence and mix. After discharge, cool to room temperature and let stand. Add sulfur, accelerator CZ, and organometallic complex to the above-mentioned masterbatch and mix. After discharge, press into sheets, cool and let stand to make the core rubber. Put EPDM rubber and EPDM rubber into a mixer, then add carbon black N550, paraffin oil, and antioxidants and mix. After discharge, cool to room temperature and let stand. Add sulfur, accelerator BZ, and accelerator TMTD to the stand-up masterbatch, mix, discharge, press into sheets, cool and let stand to make the cover rubber. Step 2: Arrange the aramid ropes evenly and maintain tension. First, fill the gaps between the aramid ropes with core adhesive. Then, cover the top and bottom of the filled base layer with cover adhesive and compact it to obtain the composite strip blank. Step 3: Place the composite belt blank in a flat vulcanizing machine for vulcanization, trim and cool after vulcanization to obtain the aramid rope core conveyor belt; The organometallic complex is composed of cerium naphthenate and nickel dibutyldithiocarbamate in a mass ratio of 0.5-2:0.5-2.

2. The manufacturing process of the aramid rope core conveyor belt as described in claim 1, characterized in that, The preparation process is as follows, in parts by weight: Step 1: Add silane coupling agent KH550 to a 60-75wt% ethanol aqueous solution to prepare a 1-3% (w / w) mixture. Adjust the pH to 4-6 using 0.5-2mol / L hydrochloric acid. Impregnate the aramid rope with this solution, then dry and cure at 80-100℃ for 1-5 hours. Plasticize 30-60 parts of natural rubber and 30-70 parts of styrene-butadiene rubber at 70-85℃ for 0.5-3 minutes. Then, sequentially add 1-5 parts of resorcinol, 1-3 parts of hexamethylenetetramine, 5-20 parts of silica, 20-50 parts of carbon black N330, and 5-10 parts of paraffin oil, and mix at 75-90℃ for 5-15 minutes, ensuring uniform dispersion of the fillers. After discharge, spread the masterbatch on an iron plate, cool to room temperature, and let it stand for 2-6 hours. Return the rested masterbatch to the internal mixer, adding 1-5 parts of sulfur and accelerator CZ. Mix 0.5-2 parts of EPDM rubber and 0.5-2 parts of organometallic complex at 70-85℃ for 1-5 minutes, discharge the rubber, press into sheets, cool and let stand for 1-5 hours to make core rubber; put 50-80 parts of EPDM rubber and 20-40 parts of EPDM rubber into an internal mixer, then add 20-40 parts of carbon black N550, 5-20 parts of paraffin oil and 1-3 parts of antioxidant, mix at 100-120℃ for 3-15 minutes, discharge the rubber, spread out and cool to room temperature, let stand for 1-10 hours, put the rested cover masterbatch into an internal mixer, add 1-3 parts of sulfur, 0.5-2 parts of accelerator BZ and 0.1-0.5 parts of accelerator TMTD, control the temperature at 70-90℃ and mix for 1-5 minutes, discharge the rubber, press into sheets, cool and let stand for 1-5 hours to make cover rubber; Step 2: Arrange the aramid ropes evenly and maintain tension. First, fill the gaps between the aramid ropes with core adhesive. Then, cover the top and bottom of the filled base layer with cover adhesive. Compact the core adhesive with a calender to ensure no air bubbles, and obtain the composite strip blank. Step 3: Place the composite belt blank in a flat vulcanizing machine for vulcanization. After vulcanization, trim the edges and cool it to room temperature with water to obtain the aramid rope core conveyor belt.

3. The manufacturing process of the aramid rope core conveyor belt as described in claim 1 or 2, characterized in that, In step 2, the aramid ropes are evenly arranged and kept under tension of 200-300N with a spacing of p=8-15mm.

4. The manufacturing process of the aramid rope core conveyor belt as described in claim 1 or 2, characterized in that, In step 2, the filling thickness of the core adhesive is consistent with the diameter of the aramid rope.

5. The manufacturing process of the aramid rope core conveyor belt as described in claim 1 or 2, characterized in that, In step 3, vulcanization is carried out at a temperature of 140-180℃ and a pressure of 1-2MPa for 20-50 minutes.

6. The manufacturing process of the aramid rope core conveyor belt as described in claim 1 or 2, characterized in that, In step 3, the thickness of the aramid rope core conveyor belt is t=17.5-25.5mm, the thickness of the upper cover rubber is t1=6-10mm, the thickness of the lower cover rubber is t2=6-10mm, the width is b=43-76mm, the center distance between the outermost two ends of the aramid rope is b1=32-60mm, and the width of the edge rubber is b2=5.5-8mm.

7. The manufacturing process of the aramid rope core conveyor belt as described in claim 1 or 2, characterized in that, The organometallic complex may also be composed of cerium naphthenate, nickel dibutyldithiocarbamate, and lanthanum stearate in a mass ratio of 0.5-2:0.5-2:0.1-0.

3.

8. An aramid rope core conveyor belt, characterized in that, It is prepared using the preparation process described in any one of claims 1-7.

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