Belt for a winding device, and method for manufacturing same

Abstract

The present invention relates to a belt (100) for a winding device (200) for producing a lap roll (910) when winding a lap (901) onto a sleeve-like core (920), the belt (100) being designed as an endless belt and being driven in a circulating manner. The belt (100) has a thickness (103) of between 1.2 mm and 2.2 mm, a transport layer (110), and a winding layer (120). The transport layer (110) can be driven by rollers (201, 202, 204, 205) by way of frictional engagement, and the winding layer (120) can wind a lap (901) onto a sleeve-like core (920).

Description

[0001] Belt for a winding device and its manufacturing process

[0002] Technical area

[0003] The present invention relates to a belt for a winding device for producing a lap roll.

[0004] Technological background

[0005] For the production of a cotton roll, there are winding devices that form a cotton roll using a flat belt. A loop of the belt is placed around a sleeve that is rotatably mounted on a stationary axis. This loop adjusts in size as the winding diameter increases and almost completely wraps around the cotton roll at the end of the winding process. To form the cotton roll, a web of cotton is inserted between two pulleys into the belt loop and transferred to the surface of the sleeve.

[0006] Over time, winding devices are able to produce larger and / or wider cotton rolls, and the forces required to produce such rolls have increased dramatically, reaching up to 500 N and more. Ambient temperature also plays an important role, along with humidity: one influences the elasticity of the belt and / or the other, the static friction of the belt on the rollers, for example.

[0007] Summary of the invention

[0008] The object of the present invention is to provide a belt for a winding device which does not have all or part of the disadvantages of the known prior art mentioned and which has or achieves a low expansion and better static friction during operation.

[0009] The object is achieved in whole or in part by the features of the invention. To achieve this object, a belt for a winding device for producing a lap roll when winding laps onto a sleeve-like core is proposed. The belt is designed as an endless belt and is driven in a rotating manner, wherein the belt comprises: - a thickness between 1.2 mm and 2.2 mm;

[0010] - a transport layer; wherein the transport layer is configured to be driven by a plurality of rollers via frictional engagement; and,

[0011] - a winding layer; wherein the winding layer is configured to wind a batting onto a sleeve-like core and is driven by frictional engagement by at least one roller.

[0012] Advantageously, the belt can withstand or absorb greater forces, allowing the production of a larger and / or wider lap. But that's not all. Thanks to these technical features, the belt can operate at higher ambient temperatures and humidity: one influences the elasticity of the belt and / or the other, the static friction of the belt on the rollers. The expansion and / or elasticity of a belt plays or plays an important role in the production of a lap. This enables the production of a compact and uniformly constructed lap of optimal quality while maintaining maximum productivity and speed. Lap quality is actually based, among other things, on a uniform lap weight and a homogeneous lap structure. As soon as the properties of the belt, such as the expansion coefficient, change under the influence of temperature, the lap quality changes.Another disadvantage of changing the expansion coefficient is the static friction of the belt on the rollers. This static friction can change due to temperature and / or humidity. Depending on the temperature and / or humidity, the belt may no longer adhere properly to the rollers, resulting in an uneven distribution of the contact pressure across the winding circumference.

[0013] According to one embodiment, the transport layer comprises a thickness between 0.2 mm and 0.6 mm, preferably between 0.3 mm and 0.5 mm, and / or the winding layer comprises a thickness between 1.0 mm and 2 mm, preferably between 1.4 mm and 1.8 mm.

[0014] Thanks to one of the embodiments, the transport layer can withstand higher pressure and / or the winding layer adheres better to the rollers. This object is achieved in whole or in part by the features of the invention. To achieve this object, a manufacturing method for a belt for a winding device for producing a lap roll when winding laps onto a sleeve-like core is proposed. The method comprises:

[0015] - Provision of two different materials:

[0016] - a transport layer: the transport layer comprising a transport side and a first fastening side facing away from the transport side; and, a winding layer: the winding layer comprising a winding side and a second fastening side facing away from the winding side;

[0017] - Opposite superposition of the first and second fastening sides;

[0018] - Assembling the first and second fastening sides to produce a belt having a thickness between 1.2 mm and 2.2 mm.

[0019] Advantageously, the belt can withstand greater forces, allowing the production of a larger and / or wider lap. But that's not all. Thanks to these technical features, the belt can operate at higher ambient temperatures and humidity: one influences the elasticity of the belt and / or the other, the static friction of the belt on the rollers. The expansion and / or elasticity of a belt plays or plays an important role in the production of a lap. This enables the production of a compact and uniformly constructed lap of optimal quality while maintaining maximum productivity and speed. Lap quality is actually based, among other things, on a uniform lap weight and a homogeneous lap structure. As soon as the properties of the belt, such as the expansion coefficient, change under the influence of temperature, the lap quality changes.Another disadvantage of changing the expansion coefficient is the static friction of the belt on the rollers. This static friction can change due to temperature and / or humidity. Depending on the temperature and / or humidity, the belt may no longer adhere properly to the rollers, leading to an uneven distribution of the contact pressure across the winding circumference. Description of the figures.

[0020] The above and other objects, features, aspects and advantages of the invention will become apparent from the following detailed description of the embodiments, which are given by way of illustration and not by way of limitation with reference to the accompanying drawings, in which

[0021] - Figure 1 illustrates a schematic representation of a winding device 200 with a belt 100 according to an embodiment of the invention; and,

[0022] - Figure 2 presents a schematic representation of a method 500 according to an embodiment of the invention.

[0023] In the following description of the illustrated embodiments, the same reference numerals are used for features that are identical and / or at least comparable in their design and / or mode of operation, even if they are shown in different embodiments. Unless explained again in detail, their design and / or mode of operation corresponds to the design and mode of operation of the features already described above.

[0024] Description of an embodiment

[0025] To form the lap roll 910, a lap web 901 is introduced into a winding device 200. The winding device 200 comprises a belt 100 that is guided over several deflection rollers 201, 202, 204, 205. The belt 100 forms a loop 199 between two deflection rollers 201, 205, in which a roll 910 is formed. During the winding process, the lap web 901, also called lap 901, fed into the loop 199 via calender rollers 230, is wound onto a tube 920.

[0026] As the coil 910 grows, the loop 199 also grows. A tensioning device is provided to tension the belt and compensate for belt displacement as the loop 199 grows. The tensioning device exerts greater forces on the cotton coil 910 to create a larger and / or wider cotton coil 910. This compressive force can reach up to 12 kN, even 16 kN, and places considerable strain on the belt. Other conditions such as ambient temperature and / or humidity also play a role.

[0027] With conventional belts and under special conditions, especially under high compressive force, it was observed that the quality of the larger and / or wider 910 cotton roll produced could deviate from the standard. The belt may deform under such conditions, either because the expansion coefficient of the belt has changed or because the static friction of the belt on the rollers is too weak. The compressive force, ambient temperature, and humidity can all affect the belt's properties in different ways.

[0028] The present invention can operate at high ambient temperatures and humidity and absorbs high compressive forces exerted by rollers 201, 202, 203, 204, 205, thereby producing a compact and uniformly constructed roll 910 of optimal quality while simultaneously achieving maximum productivity and speed. The belt 100, according to one embodiment, comprises a transport layer 110 made of acrylonitrile butadiene rubber, for example, and a winding layer 120, which can be designed to be fiber-free.

[0029] The transport layer 110 can be driven by frictional engagement by several rollers 201, 202, 204, 205, and can have a thickness 113 between 0.2 mm and 0.6 mm, preferably between 0.3 mm and 0.5 mm. The winding layer 120, for example made of polyamide, can wind a batting 901 onto a sleeve-like core 920 and can be driven by frictional engagement by at least one roller 203, and can have a thickness 123 between 1.0 mm and 2 mm, preferably between 1.4 mm and 1.8 mm.

[0030] As shown in Fig. 2, the transport layer 110 comprises a transport side 111 and a first fastening side 112, which may be facing away from the transport side 111. At the same time, the winding layer 120 comprises a winding side 121 and a second fastening side 122, which may be facing away from the winding side 121.

[0031] To produce this belt 100 and after providing 510 the transport layer 110 and the winding layer 120, the one first fastening side 112 of the transport layer 110 and the one second fastening side 122 of the winding layer 120 can be superimposed 520 and then assembled 530 to produce a belt 100 having a thickness 103 between 1.2 mm and 2.2 mm.

[0032] The belt 100, according to one embodiment, can be inserted into a winding device 200. As mentioned above, the batting 901 is wound onto a core 920. This core 920 is driven by a revolving, endless belt 100, which forms a loop 199 between two deflection pulleys 201, 205, in which the core 920 is received.

[0033] As shown in Fig. 1, the lap roll 910 is driven by the belt 100. The loop 199 of the belt 100 wrapping around the lap roll 910 increases as the lap roll 910 grows, with the belt 100 being tensioned by a tensioning device throughout the entire winding process. At the same time, the pressure increases, and thanks to the transport layer 110 and the winding layer 120, the belt 100 can operate at higher ambient temperatures and humidity without compromising the elasticity of the belt 100 and / or the static friction of the belt 100.

[0034] The expansion of the belt 100 is ensured and this enables a uniform wadding weight and a homogeneous winding structure 910 to produce a compact and uniformly constructed winding 910 of optimal quality while maintaining maximum productivity and speed, without the static friction decreasing due to temperature and / or humidity.

Claims

Patent claims 1. Belt (100) for a winding device (200) for producing a lap roll (910) when winding a lap (901) onto a sleeve-like core (920), wherein the belt (100) is designed as an endless belt and is driven in a rotating manner, wherein the belt (100) comprises: - a thickness (103) between 1.2 mm and 2.2 mm; - a transport layer (110); wherein the transport layer (110) is configured to be driven via frictional engagement of a plurality of rollers (201, 202, 204, 205); and, - a winding layer (120); wherein the winding layer (120) is configured to wind a batting (901) onto a sleeve-like core (920) and to be driven by frictional engagement by at least one roller (203).

2. Belt (100) according to claim 1, wherein the transport layer (110) comprises a thickness (113) between 0.2 mm and 0.6 mm, preferably between 0.3 mm and 0.5 mm, and / or the winding layer (120) comprises a thickness (123) between 1.0 mm and 2 mm, preferably between 1.4 mm and 1.8 mm.

3. Manufacturing method (500) of a belt (100) for a winding device (200) for producing a lap roll (910) when winding a lap (901) onto a sleeve-like core (920); the method (500) comprises: - Provision (510) of two different materials: - a transport layer (110): the transport layer (110) comprising a transport side (111) and a first fastening side (112) facing away from the transport side (111); and, a winding layer (120): the winding layer (120) comprising a winding side (121) and a second fastening side (122) facing away from the winding side (121); - Opposite (520) superposition of the first and second fastening sides (112, 122); - assembling (530) the first and second fastening sides (112, 122) to produce a belt (100) having a thickness (103) between 1.2 mm and 2.2 mm.

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