An elastic conveyor belt and its manufacturing method

Abstract

The present invention provides an elastic conveyor belt and a manufacturing method thereof. The conveyor belt includes a fabric layer and a surface layer, and the fabric layer and the surface layer are bonded. The fabric layer is an elastic fabric, and the surface layer is embossed. The fabric layer is composed of a first warp yarn, a second warp yarn, a first weft yarn, and a second weft yarn. The first weft yarn forms a lower weft yarn layer, the second weft yarn forms an upper weft yarn layer, the second warp yarn is located between the lower weft yarn layer and the upper weft yarn layer, and the first warp yarn alternately winds around the second weft yarn of the upper weft yarn layer and the first weft yarn of the lower weft yarn layer in sequence. The manufacturing method includes the following steps carried out in sequence: Step a: Shaping the fabric layer; Step b: Primer coating of the adhesive; Step c: Single-sided coating with PVC. The conveyor belt of the present invention has elasticity. Even if the conveyor belt is locally deformed, it does not affect the overall conveying of the conveyor belt, does not deviate, has a self-correcting function, and is suitable for applications where the width of the conveyor belt is greater than the length.

Description

Technical Field

[0001] The present invention belongs to the technical field of conveyor belts, and specifically relates to an elastic conveyor belt and a manufacturing method thereof. Background Art

[0002] The conveyor belts used at the front end of logistics diversion are characterized by a width greater than the length, and the use environment is relatively poor. The conveyor belts need to be resistant to impact and withstand being hit. Generally, three-layer three-rubber or solid-core structure conveyor belts are used in such cases. They have high strength, large deformation under force, and are not easily restored after deformation. However, since the width of the conveyor belt is greater than the length, under load, the conveyor belt is prone to twisting and running off track. In severe cases, the conveyor belt runs off track in one direction, touches the edge of the equipment, and the conveyor belt will be worn during long-term operation, and even the conveyor belt may break, affecting the continuous operation of logistics. Summary of the Invention

[0003] Aiming at the above problems existing in the prior art, the purpose of the present invention is to provide an elastic conveyor belt and a manufacturing method thereof. The conveyor belt has elasticity. Compared with the commonly used conveyor belts at the front end of logistics diversion, under the condition of a fixed elongation of the conveyor belt, the extension force of the conveyor belt is reduced. Even if the conveyor belt is locally deformed, it does not affect the overall conveying situation of the conveyor belt, does not run off track, has a self-correcting function, and is suitable for applications where the width of the conveyor belt is greater than the length.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0005] An elastic conveyor belt includes a fabric layer and a surface layer. The fabric layer and the surface layer are bonded. The fabric layer is an elastic fabric, and the surface layer is embossed.

[0006] As a further improvement of the above technical solution:

[0007] The fabric layer is composed of a first warp yarn, a second warp yarn, a first weft yarn, and a second weft yarn. The first weft yarn forms a lower weft yarn layer, the second weft yarn forms an upper weft yarn layer, the second warp yarn is located between the first weft yarn and the second weft yarn, and the first warp yarn alternately bypasses the second weft yarn and the first weft yarn in sequence.

[0008] The density of the first warp yarn is 42 threads per inch. The material of the first warp yarn includes 1000D low-shrinkage polyester activation yarn and 20D single-strand conductive yarn. One 20D single-strand conductive yarn is added to every 4 1000D low-shrinkage polyester activation yarns, and the twist is 100 turns per meter.

[0009] Among the 4 1000D low-shrinkage polyester activation yarns, 3 of them are 1000D low-shrinkage polyester activation yarns, and the twist is 100 turns per meter; the other 1000D low-shrinkage polyester activation yarn and one 20D single-strand conductive yarn are twisted together as a whole, and the twist is 100 turns per meter; the S and Z twists of the first warp yarn are arranged at intervals.

[0010] The density of the second warp yarn is 42 threads per inch, and the material of the second warp yarn is 0.3mm TPEE yarn.

[0011] The density of the first weft yarn is 25 threads per inch, and the material of the first weft yarn is 0.3mm ultra-low shrinkage polyester monofilament.

[0012] The density of the second weft yarn is 25 threads per inch, the material of the second weft yarn is 1000D ultra-low shrinkage polyester filament, and the twist is 100 turns per meter.

[0013] The surface layer material is PVC, and the thickness of the surface layer is 1.0 - 1.2mm.

[0014] A manufacturing method based on the above elastic conveyor belt includes the following steps carried out in sequence:

[0015] Step a: Shaping the fabric layer;

[0016] Step b: Primer coating of the adhesive;

[0017] Step c: Coating PVC to form the surface layer.

[0018] In step b, the adhesive includes PVC and an adhesive, and among them, the mass content of the adhesive is 5% - 7%.

[0019] The beneficial effects of the present invention are: The conveyor belt has elasticity. Compared with the existing commonly used conveyor belts at the front end of logistics diversion, under the condition of a fixed elongation of the conveyor belt, the extension force of the conveyor belt is reduced. Even if the conveyor belt is locally deformed, it does not affect the overall conveying situation of the conveyor belt, that is, it meets both the strength requirement and the elasticity requirement, does not deviate, has a self-correcting deviation function, and is suitable for applications where the width of the conveyor belt is greater than the length. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the conveyor belt of the present invention.

[0021] Figure 2 is a schematic structural diagram of the fabric layer of the present invention.

[0022] Figure 3 is a schematic diagram of the arrangement of the first warp yarn A of the present invention. Detailed Description of the Invention

[0023] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and illustrating the present invention, and are not used to limit the present invention.

[0024] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0025] An elastic conveyor belt, as Figure 1 and 2 shown, includes a fabric layer 1 and a surface layer 2. The fabric layer 1 and the surface layer 2 are bonded. The fabric layer 1 is an elastic fabric, and the material of the surface layer 2 is PVC.

[0026] The fabric layer 1 is composed of a first warp A, a second warp B, a first weft a, and a second weft b.

[0027] The first weft a forms a lower weft layer, and the second weft b forms an upper weft layer. In other words, there are two layers of weft layers. The first weft a and the second weft b are arranged in parallel to form two layers of weft layers.

[0028] In this embodiment, the density of the first weft a is 25 threads per inch. The material of the first weft a is 0.3 mm ultra-low shrinkage polyester monofilament.

[0029] In this embodiment, the density of the second weft b is 25 threads per inch. The material of the second weft b is 1000D ultra-low shrinkage polyester filament, and the twist is 100 turns per meter.

[0030] The second warp B is located between the lower weft layer and the upper weft layer, or rather, the second warp B is located between the first weft a and the second weft b.

[0031] In this embodiment, the density of the second warp B is 42 threads per inch. The material of the second warp B is 0.3 mm TPEE yarn.

[0032] The first warp A alternately bypasses the second weft b and the first weft a in sequence. With reference to the accompanying drawings, it can be seen that the first warp A includes two types. The two types of first warp A respectively bypass the first weft a and the second weft b in the same column of the two layers of weft layers.

[0033] In this embodiment, the density of the first warp A is 42 threads per inch.

[0034] The material of the first warp yarn A includes 1000D low-shrinkage polyester activated yarn and 20D single-strand conductive yarn. One 20D single-strand conductive yarn is added to every 4 pieces of 1000D low-shrinkage polyester activated yarn, and the twist is 100 turns / m. Specifically, 3 of them are 1000D low-shrinkage polyester activated yarn, and the twist is 100 turns / m; the other 1000D low-shrinkage polyester activated yarn and one 20D single-strand conductive yarn are twisted together as a whole, and the twist is 100 turns / m. The arrangement of the first warp yarn A is as follows Figure 3 As shown, the S and Z twists of the first warp yarn A are arranged at intervals. Figure 3 Among them, L is 1000D low-shrinkage polyester activated yarn, and M is the yarn obtained by twisting 1000D low-shrinkage polyester activated yarn and 20D single-strand conductive yarn together as a whole.

[0035] The PVC of the surface layer 2 is a soft and elastic PVC material, and the thickness of the surface layer 2 is 1.0 - 1.2mm. The Shore hardness of the surface layer 2 is less than 55A. In this embodiment, the Shore hardness of the surface layer 2 is less than 45A.

[0036] The purpose of the surface layer 2 being made of soft PVC is to increase the surface friction coefficient of the conveyor belt.

[0037] In this embodiment, the thickness of the PVC of the surface layer 2 is 1.0mm.

[0038] A manufacturing method of the elastic conveyor belt based on the above, includes the following steps carried out in sequence:

[0039] Step a: Shape the fabric layer 1.

[0040] In this step, the fabric layer 1 is shaped by an oven heating method. The temperature is made uniform to prevent high or low temperature areas from affecting the fabric and causing uneven shrinkage of the fabric. The heating temperature is 160°C - 180°C, the heating duration is 1.5 - 2min, and the tension is 60 - 80kg.

[0041] In this embodiment, the heating temperature is 180°C, the heating duration is 1.5min, and the tension is 60kg.

[0042] Step b: Apply the primer of the adhesive.

[0043] In this step, the fabric layer 1 is coated with the primer of the adhesive on one side, and the coating amount is 160 - 180g / m 2 . The adhesive includes PVC and an adhesive, that is, there is PVC and an adhesive in the adhesive. Among them, the mass content of the adhesive is 5% - 7%. The adhesive is isocyanate.

[0044] In this embodiment, the coating amount of the adhesive is 180g / m 2 .

[0045] Step c: Apply PVC on one side to form the surface layer 2.

[0046] In this step, apply PVC on the adhesive, that is, the adhesive is located between the fabric layer 1 and the surface layer 2.

[0047] In this embodiment, the Shore hardness of the applied PVC is less than 45A.

[0048] Step d: Press patterns on the surface layer 2.

[0049] Based on the above structure, the fabric layer 1 as the strong load-bearing layer has elasticity. Under a certain external force, the fabric layer 1 deforms, and after the external force disappears, the fabric layer 1 can return to the state before deformation. Based on the elasticity of the fabric layer 1, the conveyor belt can be stretched under a relatively small external force and has the characteristics similar to a rubber band. Even if the conveyor belt is locally deformed, it does not affect the overall conveying situation.

[0050] The following table shows the 1% elongation force of the conveyor belt. The 1% elongation force refers to the holding tension when the conveyor belt body is stretched by 1%.

[0051] Table 1: 1% elongation force of the conveyor belt

[0052]

[0053] The above table includes three groups of test results. The test environmental conditions are room temperature of 25°C and relative humidity of 65%.

[0054] The 1% elongation force of ordinary conveyor belts is generally 3 - 6 N / mm. It can be seen from the above table that the 1% elongation force of the conveyor belt in this technical solution is only 0.61 N / mm, indicating that the holding tension required for the conveyor belt in this technical solution to have the same deformation is small and it has good elasticity.

[0055] The strong load-bearing layer of ordinary conveyor belts is generally polyester filament and staple fabric, which has high strength, small fabric elasticity, and poor elastic recovery performance, and will undergo plastic deformation under long-term holding of tension. TPEE has the elasticity of rubber, has the characteristics of high strength, good flexibility and dynamic mechanical properties. This technical solution utilizes the characteristics of TPEE monofilaments and organically combines them with polyester yarns to weave an industrial cloth with a certain elastic recovery, which meets both the strength requirements and the elastic requirements.

[0056] Finally, it is necessary to state here that: The above embodiments are only used to further illustrate the technical solutions of the present invention in detail, and cannot be understood as limiting the protection scope of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention all belong to the protection scope of the present invention.

Claims

1. An elastic conveyor belt, characterized in that, It includes a fabric layer (1) and a surface layer (2). The fabric layer (1) and the surface layer (2) are bonded. The fabric layer (1) is an elastic fabric, and the surface layer (2) is embossed; the fabric layer (1) is composed of a first warp yarn (A), a second warp yarn (B), a first weft yarn (a) and a second weft yarn (b). The first weft yarn (a) forms a lower weft yarn layer, and the second weft yarn (b) forms an upper weft yarn layer. The second warp yarn (B) is located between the first weft yarn (a) and the second weft yarn (b). The first warp yarn (A) alternately bypasses the second weft yarn (b) and the first weft yarn (a) in sequence; the density of the first warp yarn (A) is 42 pieces per inch. The material of the first warp yarn (A) includes 1000D low-shrinkage polyester activation yarn and 20D single-strand conductive yarn. One 20D single-strand conductive yarn is added to every 4 pieces of 1000D low-shrinkage polyester activation yarn, and the twist is 100 turns per meter; 3 of the 4 pieces of 1000D low-shrinkage polyester activation yarn are 1000D low-shrinkage polyester activation yarn, and the twist is 100 turns per meter; the other 1000D low-shrinkage polyester activation yarn and one 20D single-strand conductive yarn are twisted together integrally, and the twist degree is 100 turns per meter; the S and Z twists of the first warp yarn (A) are arranged at intervals.

2. The conveyor belt according to claim 1, wherein: The density of the second warp yarn (B) is 42 pieces per inch, and the material of the second warp yarn (B) is 0.3mm TPEE yarn.

3. The conveyor belt according to claim 1, characterized in that: The density of the first weft yarn (a) is 25 pieces per inch, and the material of the first weft yarn (a) is 0.3mm ultra-low shrinkage polyester monofilament.

4. The conveyor belt according to claim 1, characterized in that: The density of the second weft yarn (b) is 25 pieces per inch, and the material of the second weft yarn (b) is 1000D ultra-low shrinkage polyester filament, and the twist is 100 turns per meter.

5. The conveyor belt according to claim 1, wherein: The material of the surface layer (2) is PVC, and the thickness of the surface layer (2) is 1.0 - 1.2mm.

6. A manufacturing method of the elastic conveyor belt according to any one of claims 1 to 4, characterized in that: It includes the following steps carried out in sequence: Step a: Shape the fabric layer (1). Step b: Apply a primer of the bonding material. Step c: Coat with PVC to form the surface layer (2).

7. The manufacturing method according to claim 6, characterized in that: In step b, the bonding material includes PVC and an adhesive, and among them, the mass content of the adhesive is 5% - 7%.

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