Floating knife device for slitting coated cord fabric and its slitting equipment

Abstract

This invention provides a floating knife device for longitudinal cutting of coated fabric and a longitudinal cutting device for coated fabric, comprising: an assembly base; a guide mechanism fixedly installed on the assembly base; a cutting knife assembly nested in the guide mechanism and swinging laterally along the warp direction of the fabric, the cutting knife assembly including a cutting knife with the cutting edge perpendicular to the warp direction of the fabric; and an elastic reset mechanism connected between the assembly base and the cutting knife assembly, used to provide initial zero-position positioning for the cutting knife assembly, so that the cutting knife adapts to the lateral swing of the fabric during longitudinal cutting. This invention, through the guide mechanism and the elastic reset mechanism, enables the cutting knife assembly to dynamically track the position of the fabric threads, completely solving the existing problems of thread breakage and glue separation, while improving cutting quality and reducing fabric waste.

Description

Technical Field

[0001] This utility model relates to the field of tire manufacturing technology, specifically to a floating knife device for longitudinal cutting of rubber-coated cord fabric and its longitudinal cutting equipment. Background Technology

[0002] In the rubber machinery industry, rubber-coated cord fabric (i.e., a composite material formed by applying rubber to both sides of fiber cord fabric) needs to be slit into rolls with a width of 100–200 mm through a longitudinal cutting process for use in tire production.

[0003] Currently, the mainstream longitudinal cutting techniques include the following two solutions:

[0004] Option 1: Fixed utility knife cutting solution: such as Figure 1 As shown, the utility knife is fixed to the knife holder and inserted into the gap between the curtain threads during cutting. The coated fabric runs continuously from bottom to top, and longitudinal cutting is achieved by fixing the blade.

[0005] However, due to the unavoidable lateral swaying of the curtain during operation, the fixed blade can easily cut the longitudinal threads (warp threads), such as... Figure 2 As shown, broken cords entering subsequent processes will result in defective products. Since tire manufacturing processes strictly require the integrity of the cords, this issue seriously affects product quality and yield.

[0006] Option 2: Direct tearing and splitting: such as Figure 3 As shown, the coated fabric is first pre-cut into strips, then rolled up by staggered upper and lower rollers, and the tension is used to tear the fabric along the warp direction.

[0007] However, tearing causes the cord to be exposed on one side of the slit surface (i.e., exposed cord), while the adhesive material on the other side becomes dispersed (i.e., dispersed adhesive). On the one hand, the exposed cord needs to be removed manually, resulting in material waste and increased costs; on the other hand, the adhesive residue causes the layers of the slit fabric to stick together, making it unusable for subsequent molding processes, which also leads to material loss and additional labor costs.

[0008] It is evident that there is an urgent need for a floating blade device for longitudinal cutting of coated fabric that can improve cutting quality and reduce fabric waste. Utility Model Content

[0009] In a first aspect, to solve the above-mentioned technical problems, this utility model provides a floating knife device for longitudinal cutting of coated fabric, comprising:

[0010] Assembly seat;

[0011] The guide mechanism is fixedly installed on the assembly base;

[0012] A cutting blade assembly, nested within the guide mechanism, and laterally swinging along the warp direction of the fabric, the cutting blade assembly includes a cutting blade with its blade edge perpendicular to the warp direction of the fabric; and

[0013] An elastic reset mechanism is connected between the assembly base and the cutting blade assembly to provide initial zero-position positioning for the cutting blade assembly, so that the cutting blade adapts to the lateral swing of the fabric during the longitudinal cutting process.

[0014] Furthermore, the cutting blade assembly also includes a slider and a blade holder, wherein:

[0015] The cutting blade is detachably fixed to the blade holder, and the cutting blade is fixedly connected to the slider through the blade holder;

[0016] The slider is nested within the guide mechanism.

[0017] Furthermore, the guiding mechanism includes a guide rail, which is arranged parallel to the weft direction of the fabric, and the slider is nested in the guide rail and slides laterally along the guide rail.

[0018] Furthermore, the elastic reset mechanism includes springs symmetrically arranged about the cutting blade, with one end of the spring fixed to the blade holder and the other end fixed to the spring bracket of the assembly base.

[0019] Furthermore, the spring bracket is horizontally and symmetrically positioned at the edge of the assembly seat.

[0020] Furthermore, the spring bracket is provided with a position adjustment structure to adjust the preload of the spring.

[0021] Furthermore, the assembly seat is snapped onto the square shaft and fixed by a set screw.

[0022] Furthermore, the contact surface between the cutter and the curtain fabric is provided with an inverted V-shaped cutting edge.

[0023] A second aspect of this utility model provides a longitudinal cutting device for coated fabric, including the aforementioned floating knife device for longitudinal cutting of coated fabric.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention uses a guiding mechanism and an elastic reset mechanism to enable the cutting blade assembly to dynamically track the position of the cord, completely solving the existing problem of cord breakage and separation of the cord adhesive. At the same time, it improves the cutting quality and reduces fabric waste. Attached Figure Description

[0026] Figure 1 A structural schematic diagram of an existing fixed utility knife cutting solution;

[0027] Figure 2 For the Figure 1 A schematic diagram showing the cut longitudinal cords after structural trimming;

[0028] Figure 3 This is a structural schematic diagram of an existing direct tearing scheme;

[0029] Figure 4 This is a three-dimensional structural schematic diagram of the longitudinal cutting floating knife device for coated fabric disclosed in an embodiment of the present utility model;

[0030] Figure 5 This is a front view of the coated fabric longitudinal cutting floating knife device disclosed in an embodiment of the present utility model;

[0031] Figure 6 This is a side view of the longitudinal cutting floating knife device for coated fabric disclosed in an embodiment of this utility model;

[0032] Figure 7 This is a schematic diagram of the coated fabric longitudinal cutting floating knife device disclosed in this utility model embodiment, rotating 90° via a square axis;

[0033] Figure 8 For based on Figure 7 A diagram showing the state of a cutting knife piercing into a rubber-coated fabric.

[0034] In the picture:

[0035] 00. Assembly Seat;

[0036] 11. Guide rail;

[0037] 20. Cutting blade assembly; 21. Slider; 22. Blade holder; 23. Cutting blade;

[0038] 30. Elastic reset mechanism; 31. Spring bracket; 32. Spring. Detailed Implementation

[0039] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0040] Fiber tire cord fabric: a common skeleton material for tires, generally made of polyester or nylon fibers woven from warp (longitudinal) and weft (transverse) threads.

[0041] Glue-coated fabric: The adhesive is calendered and applied to both sides of the fiber curtain fabric to form a large roll of glue-coated fabric. The width is generally around 1500mm.

[0042] Longitudinal cutting of coated cord fabric: The large roll of coated cord fabric is longitudinally cut into multiple intermediate rolls of the required width along the warp direction. The width of the intermediate rolls after longitudinal cutting is generally 100~200mm.

[0043] This invention aims to provide a floating knife device for longitudinal cutting of coated fabric, enabling the cutting knife to adaptively swing left and right on the fabric, thus solving the problem of... Figure 1-3 The existing fixed utility knife cutting scheme and direct tearing scheme shown have the problem of thread breakage and adhesive separation.

[0044] like Figure 4-6 As shown, the longitudinal cutting floating knife device for coated fabric provided in this embodiment mainly includes an assembly base 00, a guide mechanism, a cutting knife assembly 20, and an elastic reset mechanism 30.

[0045] The assembly base 00 is used to support the overall structure of the device. Since the bottom of the assembly base 00 can be equipped with either a square shaft locking interface or a translation mechanism connection, the cutter assembly has the following two driving methods:

[0046] Firstly, when the bottom of the assembly seat 00 is equipped with a square shaft locking interface, the assembly seat 00 is locked to the square shaft and fixed by the set screw. The entire cutting blade assembly is driven to rotate 90° by the square shaft, so that the cutting blade changes from a parallel state to a vertical state to pierce the gap between the curtains.

[0047] Secondly, when the bottom of the assembly seat 00 is equipped with a translation mechanism connecting part, the cutting blade can be driven vertically into the rubber-coated fabric via a cylinder or lead screw. This driving method is a conventional technical means for those skilled in the art, and therefore will not be described in detail here.

[0048] The guide mechanism is fixedly installed on the assembly base 00. Specifically, the guide mechanism includes a linear guide rail 11, which is arranged parallel to the weft direction of the fabric.

[0049] The cutting blade assembly 20 is nested within the guide mechanism and swings laterally along the warp direction of the fabric. Specifically, the cutting blade assembly 20 includes a slider 21, a blade holder 22, and a cutting blade 23. The slider 21 is nested within the guide mechanism, and further, the slider 21 is nested within the guide rail 11 and slides laterally along the guide rail 11. The blade holder 22 is provided with a quick-release clamping structure for replaceably fixing a utility knife or a disc cutting blade. The cutting blade 23 is detachably fixed to the blade holder 22, and the cutting blade 23 is fixedly connected to the slider 21 through the blade holder 22. Preferably, the contact surface between the cutting blade 23 and the fabric has an inverted V-shaped cutting edge. Optionally, the cutting blade 23 can also be a utility knife blade. The cutting edge of the cutting blade 23 is perpendicular to the warp direction of the fabric.

[0050] An elastic reset mechanism 30 is connected between the assembly seat 00 and the cutter assembly 20 to provide initial zero-position positioning for the cutter assembly 20. The elastic reset mechanism 30 can provide a zero-position reset force with a floating range of ±10mm, allowing the cutter 23 to adapt to the lateral swing of the fabric during longitudinal cutting, i.e., the cutter floats and tracks the position of the fabric threads, avoiding thread breakage during cutting. Specifically, the elastic reset mechanism 30 includes springs 32 symmetrically arranged about the cutter 23. Preferably, the springs 32 are double-strand parallel helical springs, symmetrically distributed on both sides of the cutter seat 22 to counteract the off-center load torque. One end of the spring 32 is fixed to the cutter seat 22, and the other end is fixed to the spring bracket 31 of the assembly seat 00. Slight tension or compression of the springs on both sides of the cutter provides an initial zero-position positioning, ensuring the stability of the cutting width for each cut. Furthermore, the spring bracket 31 is horizontally symmetrically arranged at the edge of the assembly seat 00. The spring bracket 31 is also provided with a position adjustment structure, such as a threaded adjustment rod, for adjusting the preload of the spring 32.

[0051] When using, cut the curtain fabric longitudinally according to the following steps:

[0052] Step 1: Drive the cutting blade 23 into the fabric by rotation or translation. The cutting edge of the cutting blade 23 cuts instead of tearing, resulting in a smooth cut surface without exposed threads or loose glue.

[0053] Step 2: When the curtain is running, the cutter 23 floats laterally to track the position of the curtain wire.

[0054] Step 3: After the curtain stops moving, the elastic reset mechanism 30 pulls the cutter back to the zero position by the pre-tension force of the spring 32.

[0055] like Figure 7-8 As shown, when the coated fabric needs to be longitudinally cut, the square shaft and the cutting blade assembly rotate 90°. The cutting blade inserts into the coated fabric at its initial position. As the coated fabric moves continuously from bottom to top, it is longitudinally cut into multiple rolls. During the cutting process, if the fabric swings or shifts left or right, the cutting blade will adaptively move left or right along the warp direction of the fabric, thus avoiding cutting the fabric threads.

[0056] It should be noted that the slitting equipment for coated cord fabric, including the floating knife device for slitting coated cord fabric provided in this embodiment, also falls within the protection scope of this utility model.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A floating knife device for slitting a rubberized cord, characterized by include: Assembly seat (00); A guide mechanism is fixedly installed on the assembly base (00); A cutting blade assembly (20), nested within the guide mechanism, and laterally swinging along the warp direction of the fabric, the cutting blade assembly (20) includes a cutting blade (23), the cutting edge of which is perpendicular to the warp direction of the fabric; and An elastic reset mechanism (30) is connected between the assembly seat (00) and the cutter assembly (20) to provide initial zero-position positioning for the cutter assembly (20), so that the cutter (23) adapts to the lateral swing of the curtain during the longitudinal cutting process.

2. The floating knife device for slitting coated fabric according to claim 1, wherein The cutting blade assembly (20) further includes a slider (21) and a blade holder (22), wherein: The cutting blade (23) is detachably fixed to the blade holder (22), and the cutting blade (23) is fixedly connected to the slider (21) through the blade holder (22); The slider (21) is nested within the guide mechanism.

3. The floating knife device for slitting coated fabric according to claim 2, wherein The guiding mechanism includes a guide rail (11), which is arranged parallel to the weft direction of the fabric. The slider (21) is nested in the guide rail (11) and slides laterally along the guide rail (11).

4. The apparatus according to claim 2, wherein the floating knife is provided with a plurality of cutting edges. The elastic reset mechanism (30) includes springs (32) symmetrically arranged about the cutter (23), with one end of the spring (32) fixed to the cutter holder (22) and the other end fixed to the spring bracket (31) of the assembly seat (00).

5. The floating knife device for longitudinal cutting of coated cord fabric according to claim 4, characterized in that, The spring bracket (31) is horizontally and symmetrically arranged at the edge of the assembly seat (00).

6. The floating knife device for slitting coated fabric according to claim 4, wherein The spring bracket (31) is provided with a position adjustment structure to adjust the preload of the spring (32).

7. The apparatus according to claim 1, wherein the apparatus further comprises a floating knife device. The assembly seat (00) is snapped onto the square shaft and fixed by a set screw.

8. The floating knife device for longitudinal cutting of coated cord fabric according to claim 1, characterized in that, The contact surface between the cutter (23) and the curtain fabric is provided with an inverted V-shaped cutting edge.

9. A longitudinal cutting device for coated cord fabric, characterized in that, Includes the coated fabric longitudinal cutting floating knife device as described in any one of claims 1-8.

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