Tension-free compounding system for high-elasticity material

Abstract

The utility model discloses a high-elasticity material tension-free compound system, and belongs to the field of elastic cloth compound processing. The feeding mechanism is arranged to unwind the elastic material roll; a plurality of tensioning rollers are arranged in a conveying path of the elastic strip for supporting, and the tension of the elastic strip is subjected to hierarchical control through a tension control assembly; the control assembly is configured to comprise a traction roller set and a tension controller, a plurality of conveying sections are formed in the conveying path, and segmented tension-free adjustment is conducted on each conveying section through the control assembly, so that the tension of the finally output elastic strip tends to be in a tension-free state, and tension-free compounding is conducted on the finally output elastic strip and the non-elastic sheet. According to the invention, tension-free compounding of an elastic material and a non-elastic material can be realized, the flatness requirement of the compounded material is met, the production speed can be adjusted as required, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elastic cloth composite processing, and more specifically, to a tension-free composite system for high-elasticity materials. Background Art

[0002] Most of the manufacturing of disposable underwear in the traditional clothing industry is done manually. In recent years, there have been few attempts to replace manual labor with mechanical equipment. Although mechanical manufacturing has the advantages of high production efficiency and low production cost, due to material and technical limitations, the structure of machine-made products is relatively simple, and the product fit is not good, resulting in a low market share of machine-made products. In addition, with the popularity of high-elasticity materials in the market in recent years, using such materials as the underwear body and having a lining (i.e., crotch piece) in the crotch area results in good product fit and ideal breathability.

[0003] However, due to the high elasticity of materials with a small denier, it is very difficult to control the tension during the stretching and traction process of the equipment. Especially when it comes to compounding other material linings with materials having a small high-elasticity fineness, if the tension control is not in place, problems such as material curling and unqualified cutting of the leg circumference arc opening are likely to occur; during automated continuous production, real-time adjustment is required according to the material running situation to ensure stable production, and the high elasticity of the material poses a great challenge to continuous production and manufacturing.

[0004] During the composite process, due to the differences in physical properties between the elastic base material and the non-elastic skin-friendly sheet, especially the different stretchabilities, the skin-friendly sheet will have a phenomenon of warping or curling at the edge part. This is also the reason for the large retraction in the area where the absorbent body is combined in the middle of existing disposable diapers or pull-ups.

[0005] Patent ZL2011203107483 discloses a tension-free material composite unwinding device. This patent solution only adopts the form of passive unwinding and cannot ensure no tension during compounding.

[0006] Patent ZL202310993573.8 involves the unwinding of tension materials, but it targets elastic rubber and can have a certain amount of tension.

[0007] Patent ZL201520410167.5 discloses a stretch fabric tension-free composite slitting machine. In this patent, the first unwinding mechanism consists of a first active wire dividing roller, a floating unwinding roller, a tension detection and control device, a first linkage wire dividing roller, and several fabric guiding rollers to form a tension-free unwinding mechanism, which can achieve tension-free unwinding, winding, and composite slitting production of stretch fabric.

[0008] Although this patent describes the use of a non-tension unwinding mechanism to unwind elastic fabric without tension, there are multiple transmissions from unwinding to lamination. There is no relevant description on how to achieve non-tension lamination ultimately. Summary of the Invention

[0009] 1. Technical Problem to be Solved by the Invention

[0010] The purpose of the present invention is to overcome the problem that two materials with inconsistent elasticity are prone to curling after lamination in the prior art, and to provide a non-tension lamination system for high-elasticity materials, which can achieve non-tension lamination of elastic materials and non-elastic materials, meet the flatness requirements of the laminated materials, and improve the processing efficiency.

[0011] 2. Technical Solution

[0012] To achieve the above object, the technical solution provided by the present invention is as follows:

[0013] A non-tension lamination system for high-elasticity materials of the present invention includes:

[0014] A feeding mechanism, which has a part for contacting the elastic strip and is used for transmitting the elastic strip;

[0015] A first control component, which includes a first traction roller group and a first tension controller, and the section between the first traction roller group and the unwinding mechanism is used as the first conveying section;

[0016] A second control component, which includes a second traction roller group and a second tension controller, and the section between the second traction roller group and the first traction roller group is used as the second conveying section;

[0017] Tension rollers, multiple tension rollers are provided and are used for supporting the transmission of the elastic strip at different positions;

[0018] A sheet conveying mechanism, which can convey non-elastic sheets;

[0019] A lamination mechanism, which is correspondingly arranged with the sheet roller group and the second traction roller group, so that the elastic strip and the non-elastic sheet can enter the lamination mechanism for lamination processing;

[0020] The first control component, the second control component, and the feeding mechanism are all electrically connected to the controller; among them,

[0021] The first tension controller is electrically connected to the feeding mechanism and is used for dynamically adjusting the tension in the first conveying section; the second tension controller is electrically connected to the first traction roller group and is used for dynamically adjusting the tension in the second conveying section;

[0022] Or:

[0023] The first tension controller is electrically connected to the first traction roller group and is used for dynamically adjusting the tension of the first conveying section; the second tension controller is electrically connected to the second traction roller group and is used for dynamically adjusting the tension of the second conveying section.

[0024] Further, it further includes a coil support, in which a floating roller is arranged for supporting the elastic coil.

[0025] Further, the feeding mechanism includes a conveyor belt, conveyor rollers and a feeding driving roller. The conveyor belt is wrapped around the conveyor rollers and the feeding driving roller, and at least two conveyor rollers support the conveyor belt to form a part for contacting the elastic strip.

[0026] Further, the conveyor belt can form a surface contact with the elastic coil.

[0027] Further, it further includes a feeding adjustment mechanism, which includes a constant-pressure cylinder, and a sliding rail and a slider that are slidably matched. The constant-pressure cylinder is fixedly arranged relative to the sliding rail, and the end of the piston rod of the constant-pressure cylinder is connected to the slider; the feeding mechanism is installed on the slider.

[0028] Further, the position of the first tension controller is lower than the position of the first traction roller group, and / or the position of the second tension controller is lower than the position of the second traction roller group.

[0029] Further, the first traction roller group adopts a double-roller structure, and one of the roller wheels is a power roller for pressing and conveying the elastic strip.

[0030] Further, the second traction roller group adopts a single-roller structure, and its roller wheel is a power roller. The second traction roller group is configured to enable the elastic strip to be transmitted at a certain wrap angle with the roller wheel.

[0031] Further, the discharging direction of the second traction roller group and the feeding direction of the composite roller group are kept at the same horizontal height.

[0032] A non-tension composite system for high-elasticity materials of the present invention includes:

[0033] A coil support, in which a floating roller is arranged for supporting the elastic coil;

[0034] A feeding mechanism, which uses a belt transmission method for feeding. Among them, a conveyor belt is arranged in the feeding mechanism, and the conveyor belt is attached to the elastic coil for surface contact conveying of the elastic strip;

[0035] A first control component, which includes a first traction roller group and a first tension controller. Between the first traction roller group and the feeding mechanism is the first conveying section, and the first tension controller can detect the tension value of the first conveying section to regulate the conveying speed of the elastic strip;

[0036] A second control component, which includes a second traction roller group and a second tension controller. The section between the second traction roller group and the first traction roller group serves as the second conveying section, and the second tension controller can detect the tension value of the second conveying section to regulate the conveying speed of the elastic strip.

[0037] A compound mechanism, which can perform compound processing on the elastic strip and the inelastic sheet.

[0038] The first control component, the second control component, and the feeding mechanism are all electrically connected to the controller by electrical signals.

[0039] Further, the feeding mechanism includes a conveyor belt, a conveying roller, and a feeding driving roller. The conveying roller is used to support the conveyor belt, and the feeding driving roller is used to drive the conveyor belt to rotate.

[0040] Further, it also includes a feeding adjustment mechanism, which includes a constant-pressure air cylinder, and a sliding rail and a slider that are slidably matched. The constant-pressure air cylinder is fixedly arranged relative to the sliding rail, and the end of the piston rod of the constant-pressure air cylinder is connected to the slider; the feeding mechanism is installed on the slider.

[0041] Further, when performing speed regulation, if the detected value is lower than the set value, the conveying speed of the elastic strip in this conveying section is reduced; if the detected value is higher than the set value, the conveying speed of the elastic strip in this conveying section is increased.

[0042] Further, it also includes using at least one third control component for tension control. This third control component is configured between the first control component and the second control component to form a corresponding conveying section.

[0043] Further, the speed of the compound roller group is set to V0, and the speed of the second traction roller group is V1. V1 is greater than or equal to V0, and the difference range is within 5% of V0.

[0044] Further, it includes a sheet conveying mechanism, which can convey the inelastic sheet.

[0045] The compound mechanism includes a compound roller group, and the inelastic sheet is compounded with the elastic strip through gluing in the compound roller group.

[0046] 3. Beneficial effects

[0047] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0048] The tension-free composite system of the high-elasticity material of the present invention sets multiple control components to realize the composite of two different elastic materials, uses a tension controller to control the tension of each transmission section, and realizes the tension-free composite of an elastic strip and an inelastic sheet. In addition, through the cooperation of multiple control components, under a certain tension, the tension can be adjusted step by step to achieve the final tension-free output, which helps to improve the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 FIG. is a schematic processing flow diagram of the tension-free composite system for elastic strips;

[0050] Figure 2 FIG. is a side view of the feeding mechanism and the feeding adjustment mechanism;

[0051] Figure 3 FIG. is a front view structure diagram of the feeding mechanism and the feeding adjustment mechanism;

[0052] Figure 4 FIG. is a schematic diagram of the unfolded state of a pair of shorts.

[0053] Explanation of the reference numerals in the schematic diagrams:

[0054] 1. Elastic material roll;

[0055] 2. Feeding mechanism; 21. Conveyor belt; 22. Unwinding driving roller; 23. Conveying roller; 24. Servo motor; 25. Constant pressure cylinder; 26. Slide rail; 27. Slide block; 28. Limit block;

[0056] 3. Tensioning roller; 41. First tension controller; 42. Second tension controller; 43. First traction roller group; 44. Second traction roller group;

[0057] 51. First composite roller; 52. Second composite roller;

[0058] 601. Front waist part; 602. Crotch part; 603. Rear waist part; 604. Elastic body. DETAILED DESCRIPTION OF THE INVENTION

[0059] To further understand the content of the present invention, the present invention will be described in detail in combination with the drawings and embodiments.

[0060] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that the present invention can implement.

[0061] Figure 1 A schematic flow diagram of the system is shown, where A represents an elastic strip and B represents an inelastic sheet.

[0062] The solution of this application provides a tension-free composite system for high-elasticity materials. Through precise tension control and efficient composite technology, this system realizes high-quality composite between elastic strips and sheets, can perform tension adjustment step by step, realizes final tension-free output, helps to improve processing efficiency, and is applicable to the manufacturing process of products such as disposable underwear. This system includes a feeding mechanism, a first control component, a second control component, and a tensioning roller. Among them, the feeding mechanism has a part for contacting the elastic strip to transmit the elastic strip; the first control component includes a first traction roller group and a first tension controller, and the section between the first traction roller group and the unwinding mechanism is used as the first conveying section; the second control component includes a second traction roller group and a second tension controller, and the section between the second traction roller group and the first traction roller group is used as the second conveying section; multiple tensioning rollers are arranged in the system to support the elastic strip at different positions. The first control component, the second control component, and the feeding mechanism are all electrically connected to the controller by electrical signals.

[0063] Specifically, in one implementation, the first tension controller is electrically connected to the feeding mechanism for dynamic tension adjustment of the first conveying section; the second tension controller is electrically connected to the first traction roller group for dynamic tension adjustment of the second conveying section.

[0064] The system further includes a sheet conveying mechanism, which can transmit inelastic sheets. The elastic strip and the inelastic strip can be compounded in the compounding mechanism. The compounding mechanism is correspondingly arranged relative to the sheet roller group and the second traction roller group, so that the elastic strip and the inelastic sheet can enter the compounding mechanism for compounding treatment.

[0065] When this mechanism is used for online processing, the feeding mechanism is used to transmit the incoming elastic strip without tension or with low tension, and at this time, there is no need to separately set a floating roller to support the elastic material roll.

[0066] As a preferred embodiment, a coil support is further included in the system, and the feeding mechanism cooperates with the elastic coil for feeding. In different embodiments, the relevant features and structures are described as follows.

[0067] Material coil support and floating roller

[0068] A floating roller is provided in the coil support of the system. The floating roller can be just the roller shafts at both ends and is used to support the elastic coil 1.

[0069] This system uses a floating roller to support the elastic coil 1, allowing the elastic strip to maintain a certain degree of freedom during transmission and reducing deformation or damage caused by uneven tension. The design of the floating roller enables the strip to adaptively adjust the tension during unwinding, ensuring the smoothness and stability of transmission. There is no limitation on the specific structure of the coil support.

[0070] Feeding mechanism

[0071] The feeding mechanism 2 has a part for contacting the elastic coil 1 to transmit the elastic strip. In one embodiment, the feeding mechanism 2 includes a driving roller, and the elastic coil 1 is unwound by the frictional force between the driving roller and the elastic coil 1.

[0072] Combined Figure 2 、 Figure 3 , in some embodiments, the feeding mechanism 2 includes a conveyor belt 21, a conveyor roller 23, and an unwinding driving roller 22. The conveyor belt 21 is wrapped around the conveyor roller 23 and the unwinding driving roller 22 to form a surface-contact conveying part that contacts the elastic coil 1. The unwinding driving roller 22 is driven by a servo motor 24. This design ensures that the frictional force between the strip and the conveyor belt 21 is evenly distributed during transmission, avoiding stretching or contraction of the strip caused by uneven frictional force. In some embodiments, the conveyor belt is preferably an elastic conveyor belt and contacts the elastic coil to form an arc surface.

[0073] In some embodiments, a feeding adjustment mechanism is further included. The feeding adjustment mechanism is used to install the feeding mechanism 2 and includes a constant-pressure cylinder 25, a guide rail 26, and a slider 27. The feeding mechanism 2 is integrally installed on the slider of the feeding adjustment mechanism. The piston rod of the constant-pressure cylinder 25 is connected to one end of the slider 27, and the slider 27 cooperates with the guide rail 26. Constant-pressure control is set for the constant-pressure cylinder so that it can drive the slider to move downward, ensuring that the conveyor belt 21 always presses tightly on the coil. In addition, a limit block 28 can be provided at the end of the guide rail 26 to prevent the slider 27 from falling off.

[0074] Control component

[0075] The control assembly includes a first control assembly and a second control assembly. The control assembly has a traction roller set and a tension controller. The traction roller set adjusts the conveying speed of the elastic strip according to the detected tension signal, making the tension of the elastic strip in its transmission section tend to be in a tension-free state; when adjusting to the tension-free state, if the detected value is lower than the set value, the conveying speed of the elastic strip in this conveying section is reduced to increase the tension; if the detected value is higher than the set value, the conveying speed of the elastic strip in this conveying section is increased. This dynamic adjustment method ensures that the strip is close to a tension-free state in each conveying section.

[0076] In a conceivable embodiment, the control assembly includes a first control assembly and a second control assembly. The first control assembly includes a first traction roller set 43 and a first tension controller 41. Between the first traction roller set 43 and the unwinding mechanism is the first conveying section. The first tension controller 41 can control the variable-speed operation of the feeding mechanism 2 according to the tension value of the first conveying section. When the first tension controller 41 detects that the real-time tension is lower than the set value, the conveying speed of the elastic strip of the feeding mechanism 2 is reduced to increase the tension. When the first tension controller 41 detects that the real-time tension is higher than the set value, the conveying speed of the elastic strip of the feeding mechanism 2 is reduced to reduce the tension.

[0077] The second control assembly is configured to include a second traction roller set 44 and a first tension controller 42. Between the second traction roller set 44 and the first traction roller set 43 is the second conveying section. The first tension controller 42 controls the variable-speed operation of the first traction roller set 43 according to the tension value of the second conveying section for dynamic tension adjustment. When the first tension controller 42 detects that the real-time tension is lower than the set value, the conveying speed of the elastic strip of the first traction roller set 43 is reduced to increase the tension. When the first tension controller 41 detects that the real-time tension is higher than the set value, the conveying speed of the elastic strip of the first traction roller set 43 is reduced to reduce the tension.

[0078] In another embodiment, it can be configured that: the first tension controller 41 controls the variable-speed operation of the first traction roller set 43 according to the tension value of the first conveying section for dynamic tension adjustment; the first tension controller 42 controls the variable-speed operation of the second traction roller set 44 according to the tension value of the second conveying section for dynamic tension adjustment.

[0079] In one embodiment, the first traction roller set 43 has a double-roller structure, where one roller is a driving roller for pressing the elastic strip; the second traction roller set 44 has a single-roller structure, and its roller is a driving roller; and the discharging direction of the second traction roller is at the same horizontal height as the feeding direction of the composite roller set.

[0080] In some embodiments, the elastic strip is transmitted around the rollers of the first traction roller set 43 and the second traction roller set 44 at a certain wrap angle. This wrap angle transmission method helps to better control the tension of the strip and ensure the stability of the strip during transmission. To form the wrap angle, the tensioning roller 3 can be used for deflection, so as to ensure the effectiveness of the traction roller set.

[0081] In traditional tension-free lamination, if more traction roller sets are added, it means that the difficulty of tension control will increase. In the case of using a tension controller for hierarchical control, increasing the wrap angle can achieve more stable transmission.

[0082] Furthermore, for the tension controller therein, it is arranged in the lower area of the traction roller set, so that the data detected by the tension controller simultaneously includes the influence of the gravity of the elastic strip on the tension, and the detection is more accurate.

[0083] In some embodiments, at least one third control component can be added between the first control component and the second control component, and a corresponding conveying section is formed. In the embodiments of the present application, the transmission path of the elastic strip is divided into multiple conveying sections, so as to achieve independent control of each section; in addition, a hierarchy is formed between the respective conveying sections, and they can cooperate with each other, so as to gradually weaken the influence of tension section by section.

[0084] It should be noted that in the prior art, tension-free unwinding is performed during unwinding. On the one hand, it is difficult to achieve a good tension-free state, and the tension fluctuation is large; on the other hand, it is in an uncontrollable state. When the unwinding speed increases, it may cause a greater tension fluctuation. Therefore, its production efficiency is limited.

[0085] Based on the hierarchical control method in the solution of the present application, during unwinding, if a higher production efficiency is required, the unwinding speed can be increased, which will cause a certain tension on the elastic strip during unwinding. Then, this tension is gradually weakened and corrected by each conveying section, so as to ensure a higher-efficiency tension-free lamination, and within a certain efficiency range, the control of the production speed can be achieved.

[0086] Sheet conveying mechanism

[0087] The sheet conveying mechanism is used to convey non-elastic sheets, such as the skin-friendly sheet material of disposable underwear, which is generally non-elastic non-woven fabric. The sheet conveying mechanism can have a cutting station to form a sheet structure of a corresponding shape for subsequent lamination. The sheet conveying mechanism ensures that the sheet can be matched with the elastic strip during lamination by precisely controlling the transmission speed and tension of the sheet. For the specific structure of the sheet conveying mechanism, reference can be made to the existing roller feeding mechanism technology. Since non-elastic sheets do not have obvious elasticity, they are easy to be transmitted by tension without affecting deformation.

[0088] Laminating mechanism

[0089] The composite mechanism is used for the composite treatment of elastic strip materials and inelastic sheet materials; in the gluing or thermal gluing process, there is a composite roller group in the composite mechanism. The composite roller group includes at least two rollers, the first composite roller 51 and the second composite roller 52, where the first composite roller 51 serves as the driving roller. It is used for pressing two materials together. Through the pressing action of the composite roller group, the elastic strip material and the sheet material are tightly bonded together to form an integrated structure. In the ultrasonic welding process, the composite roller group can have only one roller and cooperate with ultrasonic equipment to form a composite station. Therefore, the composite roller group does not necessarily require multiple rollers.

[0090] The section between the second traction roller group 44 and the composite roller group is the third conveying section. The second traction roller group 44 is arranged close to the composite roller group. In order to reduce the influence of gravity, the elastic strip material is conveyed in a horizontal state in the third conveying section.

[0091] In the composite mechanism, the speed of the composite roller group is set to V0, and the speed of the second traction roller group 44 is V1, which is generally configured to be equal to V0. In order to avoid affecting the composite effect due to speed fluctuations during composite, in the preferred solution, V1 is greater than or equal to V0, and there is a certain fluctuation difference between the two, and the difference range is within 5% of V0. Such speed matching ensures the tension control during the composite process, enabling the elastic strip material to always be in a relaxed state and avoiding product curling caused by speed mismatch.

[0092] The speed difference between the speed V1 of the second traction roller group 44 and the speed of the composite roller group is adjusted through the second traction roller group 44 to keep it within the set value range. This adjustment method ensures the stable transmission of the strip material and the sheet material during the composite process.

[0093] During specific composite, adhesive composite is used between the elastic strip material and the inelastic sheet material. For example, hot melt adhesive composite. Before entering the composite roller group, it is necessary to apply glue to the inelastic sheet material first, and this method can refer to the existing glue application methods. As other implementation modes, the inelastic sheet material is composite with the elastic strip material through thermal composite, gluing or ultrasonic welding composite methods at the composite station. The selection of these composite methods can be considered according to specific process requirements and material characteristics, without specific limitations.

[0094] Combining the characteristics of the above structures, a non-tension composite system for high-elasticity materials in this embodiment includes a material roll support, a feeding mechanism, a control component, and a composite mechanism. A floating roller is arranged in the material roll support for supporting the elastic material roll; the feeding mechanism uses a belt transmission method for feeding. Among them, a conveyor belt is arranged in the feeding mechanism, and the conveyor belt is in surface contact with the elastic material roll to convey the elastic strip material.

[0095] The control assembly includes a first control assembly and a second control assembly. The first control assembly includes a first traction roller set and a first tension controller. Between the first traction roller set and the feeding mechanism is a first conveying section. The first tension controller can detect the tension value of the first conveying section to regulate the conveying speed of the elastic strip. The second control assembly includes a second traction roller set and a second tension controller. Between the second traction roller set and the first traction roller set is a second conveying section. The second tension controller can detect the tension value of the second conveying section to regulate the conveying speed of the elastic strip. The first control assembly, the second control assembly, and the feeding mechanism are all electrically connected to the controller. The composite mechanism can perform composite processing on the elastic strip and the inelastic sheet.

[0096] In this embodiment, there is no sheet conveying mechanism. The required inelastic sheet can be directly generated by an existing mechanism. When the composite system of this embodiment is combined with it, the elastic strip and the inelastic sheet can be composite.

[0097] Further, the feeding mechanism includes a conveyor belt, a conveying roller, and a feeding drive roller. The conveying roller is used to support the conveyor belt, and the feeding drive roller is used to drive the conveyor belt to rotate. Specifically, reference can be made to the content description of the above feeding mechanism.

[0098] Combined with the above embodiments, when performing speed regulation, if the detected value is lower than the set value, the conveying speed of the elastic strip in this conveying section is reduced; if the detected value is higher than the set value, the conveying speed of the elastic strip in this conveying section is increased. The speed of the composite roller set is set to V0, and the speed of the second traction roller set is V1. V1 is greater than or equal to V0, and the difference range is within 5% of V0.

[0099] For better tensionless control, based on the above system embodiments, it further includes using at least one third control assembly for tension control. The third control assembly is configured between the first control assembly and the second control assembly to form a corresponding conveying section.

[0100] In a specific implementation, in order to enable the device to meet production requirements, a cutting station can be set after the composite station to cut the composite material to form a corresponding shape for specific product processing.

[0101] Combined with the above tensionless composite system for elastic strips, it is used to process disposable shorts. Refer to Figure 3 , the processed shorts at least have a front waist part 601, a crotch part 602, and a rear waist part 603. A skin-friendly sheet is composite on the inner side of the crotch part 602. In order to avoid curling of the crotch part 602 after composite with the skin-friendly sheet, the shorts can be processed through the above system.

[0102] An elastic strip is used as the material for the crotch 602, and a non-elastic sheet is used as the skin-friendly sheet material. The elastic strip and the non-elastic sheet are compounded without tension by the aforementioned method of compounding an elastic strip without tension. For example, the elastic strip and the non-elastic sheet are compounded together with glue. Both the elastic strip and the non-elastic sheet are made of non-woven fabric.

[0103] The compounded material is cut and welded to form a connected front waist portion 601, a crotch portion 602, and a rear waist portion 603. Cutting means forming corresponding shapes; welding can be ultrasonic welding to connect relevant parts, for example, to connect the two sides of the front waist portion 601 and the rear waist portion 603.

[0104] In one embodiment, the front waist portion 601, the crotch portion 602, and the rear waist portion 603 are integrally formed by an elastic strip, and a non-elastic sheet is compounded on the crotch portion 602.

[0105] The manufacturing process of the shorts includes the following steps:

[0106] First, place the elastic material roll 1 on the floating roller, and unwind the elastic material roll 1 through the feeding mechanism 2.

[0107] In the transmission path formed by the elastic strip passing through multiple tension rollers 3, the tension of the elastic strip is hierarchically controlled by a tension control component. The control component is configured to include a traction roller group and a tension controller. The traction roller group adjusts the transmission speed of the elastic strip according to the detected tension signal, so that the tension of the elastic strip in its transmission section tends to be a tension-free state.

[0108] The first control component is configured to: include a first traction roller group 43 and a first tension controller 41. The section between the first traction roller group 43 and the feeding mechanism is the first conveying section. The first tension controller 41 controls the variable-speed action of the feeding mechanism 2 according to the tension value of the first conveying section for dynamic tension adjustment.

[0109] The second control component is configured to: include a second traction roller group 44 and a second tension controller 42. The section between the second traction roller group 44 and the first traction roller group 43 is the second conveying section. The second tension controller 42 controls the variable-speed action of the first traction roller group 43 according to the tension value of the second conveying section for dynamic tension adjustment.

[0110] After the elastic strip exits the second control component, it enters the compounding roller group with the non-elastic sheet for tension-free compounding.

[0111] Among them, during the transmission process, the non-elastic sheet is cut into a certain shape, coated with glue on the surface, and then enters the compounding roller group for compounding.

[0112] After compounding, existing underwear processing methods can be used for processing. The corresponding processing steps may include:

[0113] The composite elastic strip is cut to form a front waist part 601, a crotch part 602, and a rear waist part 603 with a certain shape.

[0114] Waist elastomers 604 are added to both longitudinal ends, and the two ends are folded and edge-wrapped to cover the elastomers 604.

[0115] The front waist part 601 and the rear waist part 603 are folded in half, and welded on both sides of the waist part, such as by ultrasonic welding. At the same time, the excess parts are cut off to realize the connection of the front waist part 601 and the rear waist part 603, forming the processed shorts.

[0116] In order to avoid cracking of the inelastic sheet, ultrasonic welding is performed on both longitudinal edges of the inelastic sheet to form multiple transverse welding points, which can play an elastic transition role at the connection between the elastic strip and the inelastic sheet and avoid edge cracking.

[0117] The above processing steps are mainly based on the existing short processing method. For the elastic composite part, the inelastic sheet is compounded as the skin-friendly sheet by using the process of the present application. The remaining processes can refer to the prior art, such as the corresponding processing technologies in patents WO2014 / 185247, CN202211183133.8, and CN1265017A.

[0118] In the above content:

[0119] "Elastic" refers to a material that can be stretched in a certain direction and can return to its original state after stretching. Based on this, "elastic strip" refers to a strip-shaped material with elasticity. As an applicable application scenario of this method, the elastic strip is the basic material for manufacturing shorts and is used to form areas such as the waist and crotch. Especially for highly elastic materials, there are many wrinkles on the surface and they are easily stretched.

[0120] "Floating roller" means that the roller or connecting shaft can rotate freely, has a good pivot connection point, and can be rotated by a small external force to ensure that there is no tension when the elastic material roll is unwound. Of course, it is impossible to achieve completely zero tension in practice. Therefore, the so-called zero tension more refers to a state approaching zero tension or a relatively loose state, and it is not required that the true value must be without tension.

[0121] "Zero tension" means that the elastic material approaches a zero-tension state. For elastic materials, it is manifested as a relatively loose state and there is no tensile deformation; for inelastic materials, even if they are stretched, since they do not have elasticity, they will not retract. Therefore, it is not required that the inelastic material be in a zero-tension or loose state during zero-tension compounding.

[0122] "Inelastic" means that when a material is stretched, it does not have the ability to return to its original state. The inelasticity referred to here can be completely non-elastic, or it can have a certain degree of micro-elasticity, or it can be the micro-elastic ability formed by the material's own properties. After being stretched, its elongation rate is generally within 20%.

[0123] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A tension-free composite system of highly elastic materials, characterized in that: include: A feeding mechanism, wherein the feeding mechanism has a portion for contacting the elastic strip material to transport the elastic strip material; A first control component, the first control component includes a first traction roller group and a first tension controller, and the first traction roller group and the unwinding mechanism serve as a first conveying section; A second control assembly, the second control assembly comprising a second traction roller group and a second tension controller, the second traction roller group and the first traction roller group serving as a second conveying section; A tensioning roller, wherein a plurality of tensioning rollers are provided and used to support the transmission of the elastic strip at different positions; A sheet material conveying mechanism capable of conveying non-elastic sheets; A compounding mechanism, wherein the compounding mechanism is arranged corresponding to the sheet roller group and the second traction roller group, so that the elastic strip material and the non-elastic sheet material can enter the compounding mechanism for compounding processing; The first control component, the second control component, and the feeding mechanism are all connected to the controller by electrical signals; wherein, The first tension controller is connected to the feeding mechanism by electrical signals and is used for dynamic tension adjustment of the first conveying section; the second tension controller is connected to the first traction roller group by electrical signals and is used for dynamic tension adjustment of the second conveying section; or: The first tension controller is connected to the first traction roller group via electrical signals and is used for dynamic tension adjustment of the first conveying section; the second tension controller is connected to the second traction roller group via electrical signals and is used for dynamic tension adjustment of the second conveying section.

2. The tension-free composite system according to claim 1, characterized in that: The invention also comprises a material roll support, wherein a floating roller is arranged in the material roll support for supporting the elastic material roll.

3. The tension-free composite system according to claim 2, characterized in that: The feeding mechanism comprises a conveyor belt, a conveyor roller and a material discharge driving roller. The conveyor belt is covered on the conveyor roller and the material discharge driving roller. At least two conveyor rollers support the conveyor belt to form a part for contacting the elastic belt.

4. The tension-free composite system according to claim 3, characterized in that: The conveyor belt is capable of forming a surface contact with the elastic roll.

5. The tension-free composite system according to claim 3, characterized in that: It also includes a feeding adjustment mechanism, which includes a constant pressure cylinder, and a sliding rail and a slider that slide together. The constant pressure cylinder is fixed relative to the sliding rail, and the end of the piston rod of the constant pressure cylinder is connected to the slider; the feeding mechanism is installed on the slider.

6. The tension-free composite system according to claim 1, characterized in that: The position of the first tension controller is lower than the position of the first traction roller group, and / or the position of the second tension controller is lower than the position of the second traction roller group.

7. The tension-free composite system according to any one of claims 1 to 6, characterized in that: The first traction roller group adopts a double-roller structure, one of which is a power roller for pressing and feeding the elastic material strip.

8. The tension-free composite system according to any one of claims 1 to 6, characterized in that: The second traction roller set adopts a single roller structure, and the roller wheel thereof is a power roller. The second traction roller set is configured to enable the elastic strip to be transmitted at a certain wrap angle with the roller wheel.

9. The tension-free composite system according to claim 8, characterized in that: The discharging direction of the second traction roller group and the feeding direction of the composite roller group are maintained at the same horizontal height.

10. A tension-free composite system of highly elastic materials, characterized in that: include: A material roll support, wherein a floating roller is provided in the material roll support for supporting the elastic material roll; A feeding mechanism, wherein the feeding mechanism adopts a belt transmission method to feed the material, wherein a conveyor belt is arranged in the feeding mechanism, and the conveyor belt is attached to the elastic material roll to carry out surface contact conveyance of the elastic belt material; A first control component, the first control component includes a first traction roller group and a first tension controller, the first traction roller group and the unwinding mechanism serve as a first conveying section, and the first tension controller can detect the tension value of the first conveying section for regulating the conveying speed of the elastic strip; A second control component, the second control component includes a second traction roller group and a second tension controller, the second traction roller group and the first traction roller group are used as a second conveying section, and the second tension controller can detect the tension value of the second conveying section for regulating the conveying speed of the elastic strip; A compounding mechanism, the compounding mechanism comprising a compounding roller group, the compounding mechanism being capable of compounding the elastic strip material and the non-elastic sheet material; The first control component, the second control component and the feeding mechanism are all connected to the controller by electrical signals.

11. The tension-free composite system according to claim 10, characterized in that: The feeding mechanism comprises a conveyor belt, a conveyor roller and a material discharge driving roller. The conveyor roller is used to support the conveyor belt, and the material discharge driving roller is used to drive the conveyor belt to rotate.

12. The tension-free composite system according to claim 11, characterized in that: It also includes a feeding adjustment mechanism, which includes a constant pressure cylinder, and a sliding rail and a slider that slide together. The constant pressure cylinder is fixed relative to the sliding rail, and the end of the piston rod of the constant pressure cylinder is connected to the slider; the feeding mechanism is installed on the slider.

13. The tension-free composite system according to claim 11, characterized in that: When speed control is performed, if the detected value is lower than the set value, the elastic band conveying speed of the conveying section is reduced; if the detected value is higher than the set value, the elastic band conveying speed of the conveying section is increased.

14. The tension-free composite system according to claim 10, characterized in that: It also includes using at least one third control component to control the tension, and the third control component is configured between the first control component and the second control component to form a corresponding conveying section.

15. The tension-free composite system according to claim 10, characterized in that: The speed of the composite roller group is set to V0, and the speed of the second traction roller group is V1. V1 is greater than or equal to V0, and the difference range is within 5% of V0.

16. The tension-free composite system according to any one of claims 10 to 15, characterized in that: A sheet material conveying mechanism is included, which is capable of conveying non-elastic sheets; The non-elastic sheet material is compounded with the elastic strip material by gluing in the compound roller group.

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