A fabric stretching device

Abstract

The invention discloses a cloth base stretching device, including a driving mechanism, a front stretching roller group, a transition roller group, a rear stretching roller group and a frame, and also includes a heat transfer oil pipe group; the driving mechanism includes a front reducer, a front gear group, a rear reducer and a rear gear group; the front reducer drives the front stretching roller group through the front gear group, and the rear reducer drives the rear stretching roller group through the rear gear group; the heat transfer oil pipe group includes an inlet oil pipe and an outlet oil pipe; the front stretching roller group and the rear stretching roller group are hollow inside, and the two sides thereof are respectively connected to the inlet oil pipe and the outlet oil pipe; the transition roller group is provided with a tension detection sensor to detect the stretching tension of the cloth base. Hot oil is passed into the roller body to heat and soften the cloth base, and reduce the stretching tension required for stretching; the tension detection sensor is combined with a tension controller to control the speed difference of the front and rear reducers to set different stretching tensions for different cloth bases.

Description

Technical Field

[0001] The invention relates to the field of textile machinery and equipment, and in particular to a cloth base stretching device. Background Art

[0002] Coated abrasives are classified into many categories according to the base material, abrasive, binder, and product shape. They have different properties and uses. The most widely used type of belt-shaped coated abrasives (commonly known as cloth-based abrasive belts) mostly use thick twill woven fabrics such as polyester and polyester-cotton blends as base materials, corundum or natural diamond grains as abrasives, and full resin binders as binders to firmly bond the grains to the base material to form a cloth-based abrasive belt, which can adapt to heavy grinding of metals or furniture panels under harsh conditions.

[0003] The manufacturing process of cloth-based abrasive belts is cloth-based unwinding → trademark printing → gluing → electrostatic sanding → pre-drying → gluing → main drying → winding. However, the thick twill woven fabrics such as polyester and polyester-cotton blends used in the manufacture of cloth-based abrasive belts must be pre-treated by stretching and impregnation in the stenter setting machine production line before the manufacturing process of the cloth-based abrasive belts. The most critical stretching process on the stenter setting machine production line for this textile is to stretch the textile to the limit in the warp direction first, so that the abrasive belt on the tool will not loosen during heavy grinding, ensuring a sufficiently long service life of the cloth-based abrasive belt. At the same time, it is also necessary to ensure a certain width requirement in the weft direction, and then use the stenter setting machine for drying and setting.

[0004] At present, the main cloth base abrasive belt stretching device uses two three-roller rolling mills, and uses two rolling passes of each three-roller rolling mill to press the cloth base tightly at the front and back. The front and rear three-roller rolling mills are each equipped with a worm gear reducer for transmission, and the cloth base is cold stretched to the limit by using the running speed difference of the two three-roller rolling mills to achieve the purpose of stretching the cloth base along the warp direction. The stretching force required for cold stretching of the cloth base in this way is too large, and it is also easy to make the cloth surface uneven. Some cloth base varieties cannot even meet the final cloth surface flatness requirements by stretching in this way, and the range of process varieties is narrow. In addition, the worm gear is easily damaged by the self-locking effect of the worm gear reducer for strong stretching, and the equipment is difficult to repair. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the current cloth-based abrasive belt stretching device, the present invention provides a cloth-based stretching device, which can achieve thermal stretching of the cloth-based, reduce the stretching force required for the cloth-based, reduce mechanical loss, and extend the service life of the entire machine; at the same time, it expands the variety range of the processed cloth-based.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] A cloth base stretching device comprises a driving mechanism, a front stretching roller group, a transition roller group, a rear stretching roller group and a frame, and also comprises a heat transfer oil pipe group; the driving mechanism comprises a front reducer, a front gear group, a rear reducer and a rear gear group; the front reducer drives the front stretching roller group through the front gear group, and the rear reducer drives the rear stretching roller group through the rear gear group; the heat transfer oil pipe group comprises an inlet oil pipe and an outlet oil pipe; the front stretching roller group and the rear stretching roller group are hollow inside, and the two sides thereof are respectively connected to the inlet oil pipe and the outlet oil pipe; a tension detection sensor is arranged in the transition roller group; the cloth base passes through the front stretching roller group, the transition roller group and the rear stretching roller group in sequence; the hot oil enters the roller body through the inlet oil pipe and flows out from the outlet oil pipe, so as to continuously heat the cloth base.

[0008] The front stretching roller group includes three front stretching rollers of the clamping type; the rear stretching roller group includes three rear stretching rollers of the clamping type; a plurality of bearing seats are arranged on the frame; the front stretching rollers of the clamping type and the rear stretching rollers of the clamping type are rotatably mounted on the frame through the bearing seats.

[0009] The front gear set includes a front pinion and three front large gears; the front large gears are coaxially fixedly connected to the clamp-type front stretching rollers in a one-to-one correspondence, the front large gears are meshed in sequence, and the front pinion is meshed with a front large gear; the rear gear set includes a rear pinion and three rear large gears; the rear large gears are coaxially fixedly connected to the clamp-type rear stretching rollers in a one-to-one correspondence, the rear large gears are meshed in sequence, and the rear pinion is meshed with a rear large gear.

[0010] The heat transfer oil pipe group also includes an oil delivery hose and a rotary joint; the oil delivery hose is arranged between the oil inlet pipe and the sleeve clamp type front stretching roller, the sleeve clamp type rear stretching roller, and between the oil outlet pipe and the sleeve clamp type front stretching roller, the sleeve clamp type rear stretching roller, and is rotatably connected to the sleeve clamp type front stretching roller, the sleeve clamp type rear stretching roller through a rotary joint.

[0011] The position of the oil inlet guide pipe is lower than the front stretching roller group and the rear stretching roller group; the position of the oil outlet guide pipe is higher than the front stretching roller group and the rear stretching roller group.

[0012] It also includes an anti-skid pressure roller mechanism; the anti-skid pressure roller mechanism includes a driving cylinder and a pressure roller; the anti-skid pressure roller mechanism is provided with two groups, which are respectively arranged at the cloth base entrance and the cloth base exit; wherein the pressure roller is parallel to the front stretching roller group and the rear stretching roller group; a driving cylinder is arranged at each end of the pressure roller, and the movement direction of the driving cylinder is kept perpendicular to the pressure roller.

[0013] The transition roller group includes three transition cloth guide rollers; the transition cloth guide rollers are rotatably installed on the frame and are parallel to the front stretching roller group and the rear stretching roller group; the transition cloth guide rollers are staggered up and down, and the tension detection sensor is arranged in the transition cloth guide roller in the center.

[0014] At the inlet end of the cloth base, a cloth inlet guide roller is arranged before the front stretching roller group; and at the outlet end of the cloth base, a cloth outlet guide roller is arranged.

[0015] The front reducer and the rear reducer adopt arc bevel gear hardened surface reducers, which have stronger load-bearing capacity, higher transmission ratio, smooth transmission and low noise compared with the driving mechanism of the worm and worm gear structure commonly used in the existing fabric stretching device.

[0016] The frame is of integrated design, which is convenient for correcting the horizontality and parallelism of each roller.

[0017] Advantages of the present invention:

[0018] Hot oil flows through the sleeve-type stretching rollers to heat the fabric, making it suitable for more types of fabrics. A tension detection sensor is provided in the transition roller group to detect the stretching tension. Combined with the tension controller, different stretching tensions can be set for different fabrics. It is more flexible to use, has better process repeatability, and can be used for a wider range of fabrics. The arc bevel gear hardened surface reducer is used as the power drive unit to extend the service life of the machine. All rollers are installed on an integrated frame to facilitate the correction of the level and parallelism of each roller, and the flatness of the processed fabric surface is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of an existing cloth-based abrasive belt stretching device;

[0021] Figure 2 This is a schematic diagram of the structure of a cloth base stretching device according to the present invention from a side view;

[0022] Figure 3 This is a schematic diagram of the structure of a cloth base stretching device described in the present invention from a top view.

[0023] Legend: 11. Front reducer; 12. Front pinion; 13. Front gear; 14. Rear reducer; 15. Rear pinion; 16. Rear gear; 21. Clamp-type front stretching roller; 31. Transition guide roller; 41. Clamp-type rear stretching roller; 5. Frame; 51. Bearing seat; 61. Inlet oil guide pipe; 62. Outlet oil guide pipe; 63. Oil delivery hose; 64. Rotary joint; 71. Driving cylinder; 72. Pressing roller; 81. Inlet guide roller; 82. Outlet guide roller. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 The figure shows a schematic diagram of the structure of an existing cloth-based abrasive belt stretching device, which mainly includes a front stretching three-roller rolling mill, a transition guide roller and a rear three-roller rolling mill; the front and rear three-roller rolling mills are each equipped with a worm gear reducer transmission, and the cloth base is cold stretched to the limit by using the running speed difference of the two three-roller rolling mills to achieve the purpose of stretching the cloth base along the warp direction. This method requires a large stretching force, and it is also easy to make the cloth surface uneven, and some cloth base varieties are not suitable for cold pressing, and the process variety range is narrow. In addition, the self-locking effect of the worm gear reducer is used for strong stretching, which causes great wear on the worm gear device, causing the worm gear structure to be easily damaged and inconvenient to repair.

[0026] like Figure 2 and Figure 3 As shown, a cloth base stretching device includes a driving mechanism, a front stretching roller group, a transition roller group, a rear stretching roller group and a frame 5, and also includes a heat transfer oil pipe group; the driving mechanism includes a front reducer 11, a front gear group, a rear reducer 14 and a rear gear group; the front reducer 11 drives the front stretching roller group through the front gear group, and the rear reducer 14 drives the rear stretching roller group through the rear gear group; the heat transfer oil pipe group includes an inlet oil pipe 61 and an outlet oil pipe 62; the front stretching roller group and the rear stretching roller group are hollow inside, and the two sides thereof are respectively connected to the inlet oil pipe 61 and the outlet oil pipe 62; the transition roller group is provided with a tension detection sensor; the cloth base passes through the front stretching roller group, the transition roller group and the rear stretching roller group in sequence; the hot oil enters the roller body through the inlet oil pipe 61 and flows out from the outlet oil pipe 62, and continuously heats the cloth base.

[0027] The front stretching roller group includes three clamping type front stretching rollers 21; the rear stretching roller group includes three clamping type rear stretching rollers 41; a plurality of bearing seats 51 are arranged on the frame 5; the clamping type front stretching rollers 21 and the clamping type rear stretching rollers 41 are rotatably mounted on the frame 5 through the bearing seats 51.

[0028] The front gear set includes a front pinion 12 and three front large gears 13; the front large gears 13 are coaxially and fixedly connected to the clamp-type front stretching rollers 21 one by one, the front large gears 13 are meshed with each other in sequence, and the front pinion 12 is meshed with one of the front large gears 13; the rear gear set includes a rear pinion 15 and three rear large gears 16; the rear large gears 16 are coaxially and fixedly connected to the clamp-type rear stretching rollers 41 one by one, the rear large gears 16 are meshed with each other in sequence, and the rear pinion 15 is meshed with one of the rear large gears 16;

[0029] In practical applications, in the front stretching roller set, the three clamp-type front stretching rollers 21 are distributed in an inverted "pin" shape. Among the three front large gears 13 corresponding to them one by one, the two upper front large gears 13 are both meshed with the lower front large gear 13, and the front pinion 12 is directly driven by the front speed reducer 11 and meshed with the lower front large gear 13; the positional relationship of the rear stretching roller set, the rear large gear 16, the rear pinion 15 and the rear speed reducer 14 is the same.

[0030] The heat-conducting oil pipe group further includes an oil delivery hose 63 and a rotary joint 64; the oil delivery hose 63 is arranged between the inlet oil guide pipe 61 and the clamp-type front stretching rollers 21 and the clamp-type rear stretching rollers 41, and between the outlet oil guide pipe 62 and the clamp-type front stretching rollers 21 and the clamp-type rear stretching rollers 41, and is rotatably connected to the clamp-type front stretching rollers 21 and the clamp-type rear stretching rollers 41 through the rotary joint 64; when the device works, the hot oil enters the corresponding clamp-type front stretching roller 21 or clamp-type rear stretching roller 41 from the inlet oil guide pipe 61 through the corresponding oil delivery hose 63, and after coming out of the roller body, it flows into the outlet oil conduit through the oil delivery hose 63; among them, the roller body is connected to the oil delivery hose 63 through the rotary joint 64, so as to ensure the flow of hot oil while not affecting the rotation of the roller body.

[0031] The position of the inlet oil guide pipe 61 is lower than that of the front stretching roller set and the rear stretching roller set; the position of the outlet oil guide pipe 62 is higher than that of the front stretching roller set and the rear stretching roller set, which is convenient for the hot oil to fill the cavity inside the roller body, and the hot oil can fully heat the roller body to ensure the heating effect on the fabric base.

[0032] It further includes an anti-slip pressure roller mechanism; the anti-slip pressure roller mechanism includes a driving cylinder 71 and a pressure roller 72; there are two groups of anti-slip pressure roller mechanisms, which are respectively arranged at the fabric inlet and the fabric outlet; wherein, the pressure roller 72 is arranged in parallel with the front stretching roller set and the rear stretching roller set; a driving cylinder 71 is arranged at each end of the pressure roller 72, and the action direction of the driving cylinder 71 is perpendicular to the pressure roller 72, so that the pressure roller 72 is always parallel to the front stretching roller set and the rear stretching roller set during the action process;

[0033] When a relatively thick cloth base is stretched and the cloth base slips on the stretching roller group, the driving cylinder 71 is activated to drive the pressure rollers 72 at the front and rear ends to press on the adjacent clamping front stretching roller 21 and the clamping rear stretching roller 41 respectively, so as to increase the friction force and overcome the slipping. The stretching force can continue to increase and the stretching length and width of the cloth base required by the process can be achieved.

[0034] The transition roller group includes three transition cloth guide rollers 31; the transition cloth guide rollers 31 are rotatably mounted on the frame 5 and are parallel to the front stretching roller group and the rear stretching roller group; the transition cloth guide rollers 31 are staggered up and down, and are arranged in a herringbone shape in actual application. The tension detection sensor is arranged in the transition cloth guide roller 31 in the center, and can be used to detect the stretching tension of the cloth base.

[0035] At the inlet end of the base cloth, a cloth inlet guide roller 81 is arranged before the front stretching roller group; at the outlet end of the base cloth, a cloth outlet guide roller 82 is arranged.

[0036] The front reducer 11 and the rear reducer 14 adopt arc bevel gear hard-tooth surface reducers and adjust the speeds respectively through transmission inverters. Compared with the driving mechanism of the worm and worm gear structure commonly used in the existing cloth base stretching device, the load-bearing capacity is stronger, the transmission ratio is higher, the transmission is smooth, and the noise is small; further, a tension controller can be provided to control the transmission inverter to adjust the speeds of the front reducer 11 and the rear reducer 14, thereby adjusting the speeds of the front stretching roller group and the rear stretching roller group, and different stretching tensions are achieved by controlling the speed difference between the two roller groups, thereby achieving the effect of controlling the tension; further, different tension data can be set in advance according to different cloth base materials, and selection and switching can be performed when processing different cloth bases.

[0037] The frame 5 is of an integrated design, which is convenient for correcting the horizontality and parallelism of each roller body; at the same time, the force between the front and rear clamping type stretching rollers when stretching the cloth base is internal stress, which reduces the strength requirement for the foundation of the frame 5 installation, and the installation and construction are simpler.

[0038] When the machine is working, the cloth base follows Figure 2The transmission inverter controlling the front and rear positions adjusts the rotation speed of the front reducer 11 and the rear reducer 14 so that a rotation speed difference is generated between the three jacketed front stretching rollers 21 with hot oil and the three jacketed rear stretching rollers 41 with hot oil (specifically, the rotation speed of the rear stretching roller group is slightly higher than the rotation speed of the front stretching roller group), thereby generating a tensile force to stretch and extend the base fabric, and the extended base fabric then enters the tentering setting machine for subsequent processes. The speed adjustment method is specifically to keep the speed of the rear stretching roller group consistent with the subsequent stenter setting machine, and gradually slow down the speed of the front stretching roller group to a suitable value, so that the speed difference is maintained at a certain value to generate appropriate tension, so that the base fabric is stretched in the warp direction, and at the same time, the base fabric is contracted in the weft direction so that the base fabric reaches the size required by the process; when the base fabric slips, the tension detected by the tension detection sensor will change, and the tension controller can judge whether it slips accordingly, thereby controlling the action of the driving cylinder 71, driving the pressing roller 72 to press the base fabric to increase the friction, so as to maintain the appropriate stretching tension and keep the stretching tension stable.

[0039] In addition, different stretching tensions can be set through the tension controller to meet the process requirements of different cloth bases, with better process repeatability and a wide range of applications.

[0040] Advantages of the present invention:

[0041] Hot oil flows through the sleeve-type stretching rollers to heat the fabric, making it suitable for more types of fabrics. A tension detection sensor is provided in the transition roller group to detect the stretching tension. Combined with the tension controller, different stretching tensions can be set for different fabrics. It is more flexible to use, has better process repeatability, and can be used for a wider range of fabrics. The arc bevel gear hardened surface reducer is used as the power drive unit to extend the service life of the machine. All rollers are installed on an integrated frame to facilitate the correction of the level and parallelism of each roller, and the flatness of the processed fabric surface is better.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A fabric stretching device, comprising a driving mechanism, a front stretching roller group, a transition roller group, a rear stretching roller group and a frame (5), characterized in that: It also includes a heat transfer oil pipe group; the driving mechanism includes a front reducer (11), a front gear group, a rear reducer (14) and a rear gear group; the front reducer (11) drives the front stretching roller group through the front gear group, and the rear reducer (14) drives the rear stretching roller group through the rear gear group; the heat transfer oil pipe group includes an inlet oil pipe (61) and an outlet oil pipe (62); the front stretching roller group and the rear stretching roller group are hollow inside, and the two sides thereof are respectively connected to the inlet oil pipe (61) and the outlet oil pipe (62) ; A tension detection sensor is arranged in the transition roller group; the cloth base passes through the front stretching roller group, the transition roller group, and the rear stretching roller group in sequence; the front stretching roller group includes three front stretching rollers (21) of the sleeve clamp type; the rear stretching roller group includes three rear stretching rollers (41) of the sleeve clamp type; a plurality of bearing seats (51) are arranged on the frame (5); the front stretching rollers (21) of the sleeve clamp type and the rear stretching rollers (41) of the sleeve clamp type are rotatably mounted on the frame (5) through the bearing seats (51); the front stretching rollers (21) of the sleeve clamp type and the rear stretching rollers (41) of the sleeve clamp type are rotatably mounted on the frame (5) through the bearing seats (51); The gear set comprises a front pinion (12) and three front large gears (13); the front large gears (13) are coaxially fixedly connected to the front clamping type stretching rollers (21) in a one-to-one correspondence, the front large gears (13) are meshed with each other in sequence, and the front pinion (12) is meshed with a front large gear (13); the rear gear set comprises a rear pinion (15) and three rear large gears (16); the rear large gears (16) are coaxially fixedly connected to the rear clamping type stretching rollers (41) in a one-to-one correspondence, and the rear large gears (1 6) are meshed in sequence, and the rear small gear (15) is meshed with a rear large gear (16); an anti-slip pressure roller mechanism is respectively arranged at the cloth base entrance and the cloth base exit; the transition roller group includes three transition cloth guide rollers (31); the transition cloth guide rollers (31) are rotatably installed on the frame (5) and are parallel to the front stretching roller group and the rear stretching roller group; the transition cloth guide rollers (31) are arranged in an upper and lower staggered manner, and the tension detection sensor is arranged in the transition cloth guide roller (31) at the center position.

2. The cloth base stretching device according to claim 1, characterized in that: The heat transfer oil pipe group also includes an oil delivery hose (63) and a rotary joint (64); the oil delivery hose (63) is arranged between the oil inlet pipe (61) and the sleeve clamp type front stretching roller (21), the sleeve clamp type rear stretching roller (41), and between the oil outlet pipe (62) and the sleeve clamp type front stretching roller (21), the sleeve clamp type rear stretching roller (41), and is rotatably connected to the sleeve clamp type front stretching roller (21) and the sleeve clamp type rear stretching roller (41) through the rotary joint (64).

3. The cloth base stretching device according to claim 2, characterized in that: The position of the oil inlet guide pipe (61) is lower than the front stretching roller group and the rear stretching roller group; the position of the oil outlet guide pipe (62) is higher than the front stretching roller group and the rear stretching roller group.

4. The cloth base stretching device according to claim 1, characterized in that: The anti-slip pressure roller mechanism comprises a driving cylinder (71) and a pressure roller (72); a driving cylinder (71) is respectively arranged at both ends of each pressure roller (72).

5. The cloth base stretching device according to claim 1, characterized in that: At the inlet end of the cloth base, a cloth inlet guide roller (81) is arranged in front of the front stretching roller group; and at the outlet end of the cloth base, a cloth outlet guide roller (82) is arranged.

6. The cloth base stretching device according to claim 1, characterized in that: The front reducer (11) and the rear reducer (14) are spiral bevel gear hardened surface reducers.

7. The cloth base stretching device according to claim 1, characterized in that: The frame (5) is of integrated design.

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