Safe and economical rubber v-belt production method and rubber v-belt produced by the method

Abstract

The application discloses a safe and economical rubber V-belt production method. The rubber V-belt production method adopts a specific specification of canvas, and rubber is calendered on one side of the canvas through a calendering technology. The rubber V-belt production method makes the rubber evenly cover on the canvas, does not need to use gasoline, saves the production cost, and reduces the safety hidden trouble existing in the production process. The rubber V-belt production method has good adhesion of the calendered canvas layer, can tightly cover the matrix, and is not easy to crack and deform in the product use process. Since the outer surface of the canvas layer has no rubber layer, the friction is reduced, the temperature rise is reduced, the service life of the rubber V-belt is improved, and the energy consumption of the transmission system is effectively reduced. Correspondingly, the application further discloses a rubber V-belt produced by the safe and economical rubber V-belt production method. The rubber V-belt has low manufacturing cost, long service life, and can effectively reduce the energy consumption of the transmission system in use.

Description

Technical Field

[0001] This invention relates to rubber V-belts, and more specifically to a safe and economical method for producing rubber V-belts and the rubber V-belts produced by this method. Background Technology

[0002] V-belts (triangular belts) are trapezoidal cross-section annular transmission belts widely used in agriculture, chemical industry, machinery, construction, and other fields. V-belts come in various forms, including cloth-covered belts and slit-edge belts. Cloth-covered V-belts consist of a cloth layer, a skeleton layer, a top rubber layer, and a bottom rubber layer. The skeleton layer, bottom rubber layer, and top rubber layer work together to give the V-belt good mechanical properties, while the cloth layer protects the V-belt substrate from external environmental pollution, corrosion, and wear. In current technology, the cloth layer is mostly prepared using an impregnation process. A cloth adhesive is mixed with gasoline in a certain proportion to create an impregnation adhesive, which is then used to impregnate the canvas. Making the impregnation adhesive requires a large amount of gasoline, and with rising gasoline prices, the production cost of the cloth layer has increased. Furthermore, gasoline evaporation during the impregnation process poses a safety hazard. After the impregnated canvas dries, the outer layer is coated with rubber, resulting in significant temperature rise due to friction during V-belt use, thus shortening the service life of the rubber V-belt. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a safe and economical method for producing rubber V-belts. It utilizes canvas of specific specifications and a specific rubber compound formulation, employing calendering technology to calender the rubber onto the canvas to form a covering layer. This eliminates the need for gasoline, saving costs, reducing safety hazards during production, and extending the service life of the rubber V-belt. Correspondingly, this invention also provides a rubber V-belt produced using this safe and economical method.

[0004] Regarding the production method, the present invention provides the following technical solution:

[0005] A safe and economical method for producing rubber V-belts includes the following steps:

[0006] S1. Weigh the raw materials according to the following parts by weight: 100 parts chloroprene rubber, 4-6 parts zinc oxide, 3-5 parts stearic acid, 6-9 parts PMMA dispersant, 2-4 parts phenolic resin, 10-12 parts silica, 5-8 parts aromatic oil, 2-5 parts paraffin oil, 0.2-0.5 parts CBS accelerator, 2-4 parts sulfur, and 2-5 parts antioxidant RD.

[0007] S2, add chloroprene rubber, zinc oxide, stearic acid, dispersant, phenolic resin, silica, paraffin oil, accelerator, sulfur, and antioxidant into an internal mixer, mix for 3-5 minutes, control the temperature at 110-120℃, control the sheet thickness at 2.0±0.1mm, and cool the sheet for 8-10 hours to obtain the compound rubber for later use.

[0008] S3, Take the compound rubber obtained in step S2, and extrude the compound rubber into shape through a cold-feed rubber extruder to obtain the top rubber and the isosceles trapezoidal bottom rubber for later use.

[0009] S4. Take the compound rubber obtained in step S2 and add it together with the aromatic oil into the internal mixer and mix for 80-100 seconds. Control the sheet thickness to 1.0±0.1mm to obtain calendered rubber. Feed the calendered rubber and canvas into the calender. Adjust the rollers. The upper and middle rollers stretch the calendered rubber to the required thickness. Then, calender the calendered rubber onto the canvas surface in the lower and middle rollers to obtain the covering layer for later use.

[0010] S5, on the coating machine, the base adhesive, top adhesive and skeleton layer are bonded together to form a matrix, and then transferred to the molding and wrapping machine, with the adhesive side of the wrapping layer facing inward, to wrap the matrix and form a strip blank. The strip blank is then installed on the mold and vulcanized.

[0011] Furthermore, as an optimized solution, in the aforementioned safe and economical rubber V-belt production method, in step S1, the raw materials weighed by weight include: 100 parts of chloroprene rubber, 5 parts of zinc oxide, 4 parts of stearic acid, 8 parts of dispersant PMMA, 3 parts of phenolic resin, 11 parts of silica, 7 parts of aromatic oil, 4 parts of paraffin oil, 0.3 parts of accelerator CBS, 3 parts of sulfur, and 4 parts of antioxidant.

[0012] Furthermore, as an optimization, in the aforementioned safe and economical rubber V-belt production method, in step S4, the canvas width is 86±1cm and the thickness is 0.55±0.05mm.

[0013] Furthermore, as an optimization, in the aforementioned safe and economical rubber V-belt production method, the warp density of the canvas is 155±5 threads / 10cm, and the weft density is 150±5 threads / 10cm.

[0014] Furthermore, as an optimization, in the aforementioned safe and economical rubber V-belt production method, the skeleton layer is polyester tempered brown filament.

[0015] Furthermore, as an optimization scheme, in the aforementioned safe and economical rubber V-belt production method, in step S4, during calendering, the upper roller temperature is 100-110℃, the middle roller temperature is 65-70℃, the lower roller temperature is 85-95℃, the roller gap is 6±1mm, the main roller linear speed is 10-15m / min, and the roller speed ratio is 1:(1-1.5):1.

[0016] Furthermore, as an optimization, in the aforementioned safe and economical rubber V-belt production method, the vulcanization temperature in step S5 is 150-160℃, and the vulcanization time is 30-40 minutes.

[0017] For rubber V-belt products, the technical solution of the present invention is as follows: the rubber V-belt is produced by the above-mentioned safe and economical rubber V-belt production method.

[0018] Compared with the prior art, the above-mentioned technical solution of the present invention achieves the following beneficial technical effects: Using canvas of specific specifications, differential calendering technology is used to calender the calendered rubber onto one side of the canvas, allowing the calendered rubber to evenly cover the canvas and penetrate into the mesh of the canvas, ensuring the bonding strength after vulcanization. No gasoline is needed, saving production costs and reducing safety hazards during production. The calendered overlay layer has good adhesion performance, can tightly wrap with the substrate, and is not prone to cracking or deformation during product use. Furthermore, since the overlay layer is calendered and coated on one side, without a rubber layer on the outer surface, friction is reduced and temperature rise is lowered during use, improving the service life of the rubber V-belt and effectively reducing the energy consumption of the transmission system. Correspondingly, the present invention also discloses a safe and economical rubber V-belt production method, resulting in a rubber V-belt with low manufacturing cost, long service life, and effective reduction of energy consumption in the transmission system during use. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the rubber V-belt of the present invention;

[0020] Figure 2 This is a schematic diagram of the calendering process in the present invention.

[0021] Explanation of reference numerals in the attached diagram: 1-Cloth layer; 101-Canvas; 102-Calendar rubber; 2-Top rubber; 3-Skeleton layer; 4-Bottom rubber; 5-Upper roller; 6-Middle roller; 7-Lower roller. Detailed Implementation

[0022] The technical solution of the present invention will be further described in detail below through specific embodiments. In the present invention, unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. Unless otherwise specified, the methods and equipment in the following embodiments are conventional methods and equipment in the art.

[0023] Example 1

[0024] In this embodiment, the rubber V-belt includes a skeleton layer 3, a top adhesive 2, a bottom adhesive 4, and a covering layer 1. The covering layer 1 is made by calendering calendered rubber 102 onto canvas 101 using calendering technology. The rubber V-belt in this embodiment is produced using a safe and economical rubber V-belt production method, including the following steps:

[0025] S1. Weigh the raw materials according to the following parts by weight: 100 parts chloroprene rubber, 5 parts zinc oxide, 4 parts stearic acid, 8 parts dispersant PMMA, 3 parts phenolic resin, 11 parts silica, 7 parts aromatic oil, 4 parts paraffin oil, 0.3 parts accelerator CBS, 3 parts sulfur, and 4 parts antioxidant.

[0026] S2, add chloroprene rubber, zinc oxide, stearic acid, dispersant, phenolic resin, silica, paraffin oil, accelerator, sulfur, and antioxidant into a mixer, mix for 4 minutes, control the temperature at 110℃, control the sheet thickness at 2.0mm, and cool the sheet for 10 hours to obtain the compound rubber for later use.

[0027] S3, take the compound rubber obtained in step S2, and extrude the compound rubber into shape through a cold-feed rubber extruder to obtain the top rubber and the isosceles trapezoidal bottom rubber for later use.

[0028] S4. Take the compound rubber obtained in step S2 and add it together with the aromatic oil into the internal mixer and mix for 100 seconds. Control the sheet thickness to 1.0 mm to obtain calendered rubber 102. Feed the calendered rubber 102 and canvas 101 into the calender. Adjust the rollers. The upper roller 5 and the middle roller 6 stretch the calendered rubber 102 to the required thickness. Then, calender the calendered rubber 102 onto the surface of canvas 101 in the lower roller 7 and the middle roller 6 to obtain the covering layer 1 for later use.

[0029] S5, on the coating machine, the base adhesive 4, top adhesive 2 and skeleton layer 3 are bonded together to form a matrix, and then transferred to the molding and wrapping machine, with the adhesive side of the wrapping layer facing inward, to wrap the matrix and form a strip blank. The strip blank is then installed on the mold and vulcanized.

[0030] In this embodiment, in step S4, the canvas has a width of 86cm and a thickness of 0.55mm.

[0031] In this embodiment, the warp density of the canvas is 155 threads / 10cm, and the weft density is 150 threads / 10cm.

[0032] In this embodiment, the skeleton layer is polyester tempered brown filament.

[0033] In this embodiment, during step S4, the temperature of the upper roll is 105°C, the temperature of the middle roll is 70°C, the temperature of the lower roll is 90°C, the roll gap is 6mm, the main roll linear speed is 10m / min, and the roll speed ratio is 1:1.3:1.

[0034] In this embodiment, the vulcanization temperature in step S5 is 155°C and the vulcanization time is 30 minutes.

[0035] Example 2

[0036] In this embodiment, the rubber V-belt includes a skeleton layer 3, a top adhesive 2, a bottom adhesive 4, and a covering layer 1. The covering layer 1 is made by calendering calendered rubber 102 onto canvas 101 using calendering technology. The rubber V-belt in this embodiment is produced using a safe and economical rubber V-belt production method, including the following steps:

[0037] S1. Weigh the raw materials according to the following parts by weight: 100 parts chloroprene rubber, 4 parts zinc oxide, 3 parts stearic acid, 6 parts dispersant PMMA, 2 parts phenolic resin, 10 parts silica, 5 parts aromatic oil, 2 parts paraffin oil, 0.2 parts accelerator CBS, 2 parts sulfur, and 2 parts antioxidant RD.

[0038] S2, add chloroprene rubber, zinc oxide, stearic acid, dispersant, phenolic resin, silica, paraffin oil, accelerator, sulfur, and antioxidant into a mixer, mix for 4 minutes, control the temperature at 110℃, control the sheet thickness at 2.0mm, and cool the sheet for 10 hours to obtain the compound rubber for later use.

[0039] S3, take the compound rubber obtained in step S2, and extrude the compound rubber into shape through a cold-feed rubber extruder to obtain the top rubber and the isosceles trapezoidal bottom rubber for later use.

[0040] S4. Take the compound rubber obtained in step S2 and add it together with the aromatic oil into the internal mixer and mix for 100 seconds. Control the sheet thickness to 1.0 mm to obtain calendered rubber 102. Feed the calendered rubber 102 and canvas 101 into the calender. Adjust the rollers. The upper roller 5 and the middle roller 6 stretch the calendered rubber 102 to the required thickness. Then, calender the calendered rubber 102 onto the surface of canvas 101 in the lower roller 7 and the middle roller 6 to obtain the covering layer 1 for later use.

[0041] S5, on the coating machine, the base adhesive 4, top adhesive 2 and skeleton layer 3 are bonded together to form a matrix, and then transferred to the molding and wrapping machine, with the adhesive side of the wrapping layer facing inward, to wrap the matrix and form a strip blank. The strip blank is then installed on the mold and vulcanized.

[0042] In this embodiment, in step S4, the canvas has a width of 86cm and a thickness of 0.55mm.

[0043] In this embodiment, the warp density of the canvas is 155 threads / 10cm, and the weft density is 150 threads / 10cm.

[0044] In this embodiment, the skeleton layer is polyester tempered brown filament.

[0045] In this embodiment, during step S4, the temperature of the upper roll is 105°C, the temperature of the middle roll is 70°C, the temperature of the lower roll is 90°C, the roll gap is 6mm, the main roll linear speed is 10m / min, and the roll speed ratio is 1:1.3:1.

[0046] In this embodiment, the vulcanization temperature in step S5 is 155°C and the vulcanization time is 30 minutes.

[0047] Example 3

[0048] In this embodiment, the rubber V-belt includes a skeleton layer 3, a top adhesive 2, a bottom adhesive 4, and a covering layer 1. The covering layer 1 is made by calendering calendered rubber 102 onto canvas 101 using calendering technology. The rubber V-belt in this embodiment is produced using a safe and economical rubber V-belt production method, including the following steps:

[0049] S1. Weigh the raw materials according to the following parts by weight: 100 parts chloroprene rubber, 6 parts zinc oxide, 5 parts stearic acid, 9 parts dispersant PMMA, 4 parts phenolic resin, 12 parts silica, 8 parts aromatic oil, 5 parts paraffin oil, 0.5 parts accelerator CBS, 4 parts sulfur, and 5 parts antioxidant RD.

[0050] S2, add chloroprene rubber, zinc oxide, stearic acid, dispersant, phenolic resin, silica, paraffin oil, accelerator, sulfur, and antioxidant into a mixer, mix for 4 minutes, control the temperature at 110℃, control the sheet thickness at 2.0mm, and cool the sheet for 10 hours to obtain the compound rubber for later use.

[0051] S3, Take the compound rubber obtained in step S2, and extrude the compound rubber into shape through a cold-feed rubber extruder to obtain the top rubber and the isosceles trapezoidal bottom rubber for later use.

[0052] S4. Take the compound rubber obtained in step S2 and add it together with the aromatic oil into the internal mixer and mix for 100 seconds. Control the sheet thickness to 1.0 mm to obtain calendered rubber 102. Feed the calendered rubber 102 and canvas 101 into the calender. Adjust the rollers. The upper roller 5 and the middle roller 6 stretch the calendered rubber 102 to the required thickness. Then, calender the calendered rubber 102 onto the surface of canvas 101 in the lower roller 7 and the middle roller 6 to obtain the covering layer 1 for later use.

[0053] S5, on the coating machine, the base adhesive 4, top adhesive 2 and skeleton layer 3 are bonded together to form a matrix, and then transferred to the molding and wrapping machine, with the adhesive side of the wrapping layer facing inward, to wrap the matrix and form a strip blank. The strip blank is then installed on the mold and vulcanized.

[0054] In this embodiment, in step S4, the canvas has a width of 86cm and a thickness of 0.55mm.

[0055] In this embodiment, the warp density of the canvas is 155 threads / 10cm, and the weft density is 150 threads / 10cm.

[0056] In this embodiment, the skeleton layer is polyester tempered brown filament.

[0057] In this embodiment, during step S4, the temperature of the upper roll is 105°C, the temperature of the middle roll is 70°C, the temperature of the lower roll is 90°C, the roll gap is 6mm, the main roll linear speed is 10m / min, and the roll speed ratio is 1:1.3:1.

[0058] In this embodiment, the vulcanization temperature in step S5 is 155°C and the vulcanization time is 30 minutes.

[0059] The properties of the rubber V-belts prepared in Examples 1-3 above were tested, and the results are shown in the table below.

[0060] The tensile strength and hardness of the rubber V-belt were tested according to GB / T 1171-2017, the fatigue life of the rubber V-belt was tested according to GB / T 15328-2019, and the interlaminar bond strength of the rubber V-belt was tested according to HG / T 3864-2008.

[0061] Performance test results:

[0062]

[0063] The foregoing general description of the invention and its specific embodiments should not be construed as limiting the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or embodiments without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A safe and economical method for producing rubber V-belts, characterized in that, The production method includes the following steps: S1. Weigh the raw materials according to the following parts by weight: 100 parts chloroprene rubber, 4-6 parts zinc oxide, 3-5 parts stearic acid, 6-9 parts PMMA dispersant, 2-4 parts phenolic resin, 10-12 parts silica, 5-8 parts aromatic oil, 2-5 parts paraffin oil, 0.2-0.5 parts CBS accelerator, 2-4 parts sulfur, and 2-5 parts antioxidant RD. S2, add chloroprene rubber, zinc oxide, stearic acid, dispersant, phenolic resin, silica, paraffin oil, accelerator, sulfur, and antioxidant into an internal mixer, mix for 3-5 minutes, control the temperature at 110-120℃, control the sheet thickness at 2.0±0.1mm, and cool the sheet for 8-10 hours to obtain the compound rubber for later use. S3, Take the compound rubber obtained in step S2, and extrude the compound rubber into shape through a cold-feed rubber extruder to obtain the top rubber and the isosceles trapezoidal bottom rubber for later use. S4. Take the compound rubber obtained in step S2 and add it together with the aromatic oil into the internal mixer and mix for 80-100 seconds. Control the sheet thickness to 1.0±0.1mm to obtain calendered rubber. Feed the calendered rubber and canvas into the calender. Adjust the rollers. The upper and middle rollers stretch the calendered rubber to the required thickness. Then, calender the calendered rubber onto the canvas surface in the lower and middle rollers to obtain the covering layer for later use. S5, on the coating machine, the base adhesive, top adhesive and skeleton layer are bonded together to form a matrix, and then transferred to the molding and wrapping machine, with the adhesive side of the wrapping layer facing inward, to wrap the matrix and form a strip blank, and then the strip blank is installed on the mold for vulcanization molding; In step S1, the raw materials weighed by weight include: 100 parts chloroprene rubber, 5 parts zinc oxide, 4 parts stearic acid, 8 parts PMMA dispersant, 3 parts phenolic resin, 11 parts silica, 7 parts aromatic oil, 4 parts paraffin oil, 0.3 parts CBS accelerator, 3 parts sulfur, and 4 parts antioxidant.

2. The safe and economical method for producing rubber V-belts according to claim 1, characterized in that: In step S4, the canvas width is 86±1cm and the thickness is 0.55±0.05mm.

3. The safe and economical method for producing rubber V-belts according to claim 2, characterized in that: The canvas has a warp density of 155±5 threads / 10cm and a weft density of 150±5 threads / 10cm.

4. The safe and economical method for producing rubber V-belts according to claim 1, characterized in that: The skeleton layer is made of polyester tempered brown filament.

5. The safe and economical method for producing rubber V-belts according to claim 1, characterized in that: In step S4, during calendering, the temperature of the upper roll is 100-110℃, the temperature of the middle roll is 65-70℃, the temperature of the lower roll is 85-95℃, the roll gap is 6±1mm, the linear speed of the main roll is 10-15m / min, and the roll speed ratio is 1:(1-1.5):

1.

6. The safe and economical method for producing rubber V-belts according to claim 1, characterized in that: The vulcanization temperature in step S5 is 150-160℃, and the vulcanization time is 30-40 minutes.

7. A rubber V-belt, characterized in that: The rubber V-belt is produced using the safe and economical rubber V-belt production method according to any one of claims 1-6.

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