A support structure to prevent catheter fold and method of use

Abstract

The present application belongs to the technical field of dipped cord fabric, and particularly relates to a support structure for preventing guide cord folding and a use method thereof. The support structure comprises a guide cord, and a support belt is fixedly arranged above the guide cord every 166-498 m, the diameter of the support belt is 10-50 mm, the support belt is in a cylindrical shape in a heat treatment area of a dipping machine, the heat treatment area comprises a drying area, a drafting area and a setting area, and the length of the support belt is not greater than the width of the guide cord after heat treatment. In use, (1) the support structure for preventing guide cord folding is prepared; (2) the end of the guide cord is connected with the head of the white base cord fabric; (3) the guide cord and the cord fabric enter the drying area, the drafting area, the setting area and the cooling area of the dipping machine; and (4) the guide cord is wound into a shape for next use. The support structure can prevent the folding, creases and splitting of the guide cord or the cord fabric, improves the use frequency of the guide cord, and reduces the quality and safety risks.

Description

Technical Field

[0001] This invention belongs to the field of impregnated cord fabric technology, specifically relating to a support structure for preventing the guide fabric from folding and its usage method. Background Technology

[0002] During the production of dipped tire cord fabric, the cord fabric passes through many guide rollers, stretching rollers, and spreading rollers inside the dipping machine. To avoid having to thread the cord fabric onto the dipping machine every time production begins, a guide cloth is used to connect with the cord fabric. During start-up or process changes, once the process is stable, the guide cloth pulls the cord fabric into the dipping machine; when the machine is stopped, the cord fabric pulls the guide cloth into the dipping machine, ensuring that the guide cloth maintains its proper flow pattern within the machine even when it is not in use.

[0003] The invention patent application with publication number CN103306003A describes two types of guide fabrics currently used in the production of dipped tire cord fabric: one type has warp and weft threads tightly and evenly distributed; the other type has each warp thread group spaced 1.0 to 2.0 meters apart. Both types of guide fabric structures adopt the most common cross-shaped structure, with a guide fabric width of 1.0 to 2.0 meters, 1000 to 2500 warp threads, and a guide fabric length of 300 to 1500 meters.

[0004] The heat treatment temperature for the tire cord fabric is 100–250℃, the tension is 400–7000 kg, the air velocity is 10–15 m / s, and the speed is 5–120 m / min. To meet the different heat treatment process conditions of the impregnation machine during production, the fineness, weave specifications, strength, and total warp count of the guide fabric need to be designed. However, existing technologies have the following drawbacks: 1. During start-up, shutdown, and process changes, variations in tension, temperature, air velocity, and speed may cause wrinkles on the guide fabric or tire cord fabric surface, leading to obvious creases and splitting, resulting in the scrapping of the guide fabric or tire cord fabric, and even posing safety risks, requiring an emergency shutdown of the impregnation machine. 2. When using certain special impregnation processes, such as low-tension, high-velocity, and high-width tire cord fabrics, wrinkles, creases, and splitting of the guide fabric or tire cord fabric are more likely to occur. Summary of the Invention

[0005] To address the problem of wrinkles, creases, and splits that easily occur during the impregnation of guide fabrics or curtain fabrics in the prior art, this invention proposes a support structure and its usage method to prevent guide fabric folding. This support structure can prevent wrinkles, creases, and splits in guide fabrics or curtain fabrics, increase the number of times guide fabrics can be used, and reduce quality and safety risks.

[0006] The present invention specifically adopts the following technical solution:

[0007] The application discloses a support structure for preventing cloth guide from folding, which comprises a cloth guide, and a support belt arranged above the cloth guide at intervals of 166-498 m, wherein the support belt has a diameter of 10-50 mm and is in a cylindrical shape in a heat treatment area of a glue dipping machine, and the heat treatment area comprises a drying area, a drawing area and a setting area.

[0008] In a specific application, the support belt can be a nylon 66 rod, a polytetrafluoroethylene rod or a water injection belt.

[0009] The water injection belt has an inner layer, an intermediate layer and an outer layer, the inner layer is an inner lining prepared from a polybenzimidazole (PBI) tube, and the intermediate layer and the outer layer are protective layers woven from polybenzimidazole fiber cloth, and the intermediate layer and the outer layer are waterproof, high-temperature resistant and high-pressure resistant.

[0010] The water injection belt comprises an inner layer, an intermediate layer and an outer layer, the inner layer is an inner lining prepared from a polybenzimidazole (PBI) tube, and the intermediate layer and the outer layer are protective layers woven from polybenzimidazole fiber cloth, and the intermediate layer and the outer layer are waterproof, high-temperature resistant and high-pressure resistant.

[0011] The water injection belt is a belt-shaped structure formed by heat sealing the three layers, one end of the water injection belt is provided with a water injection hole, and the water injection hole is sealed by heat sealing after water injection is completed.

[0012] In a specific implementation, the reverse osmosis burst membrane can be fixed by being pasted to the inner side of the water injection belt through glue.

[0013] As a preferred scheme, the support belt is sewn above the cloth guide. Specifically, a cloth pad is sewn above the cloth guide, in order to make the sewing firm, the number of sewing needles is 2-16, and a gap is left between the sewn cloth pad and the cloth guide, and the size of the gap is matched with the size of the outer periphery of the support belt, so that the support belt is arranged in the gap.

[0014] The application further discloses a use method of the support structure for preventing cloth guide from folding.

[0015] (1) First, the support structure for preventing cloth guide from folding is prepared.

[0016] Specifically, the method comprises the following steps.

[0017] ①Every 166-498m along the length of the guide cloth, sew a piece of cloth on the top of the guide cloth.

[0018] ②Insert and fix the support belt into the gap between the sewn cloth and the guide cloth. The specific fixing method can be: set the length of the support belt to be less than the width of the guide cloth after heat treatment, and also sew the cloth and the guide cloth at both ends of the support belt with sewing thread.

[0019] When the support belt is a water injection belt, before step ②, inject 0.08%-0.27% of the volume of the water injection belt cavity into the water injection port at one end of the water injection belt, and then seal the water injection port by heat sealing.

[0020] (2) Connect the end of the guide cloth to the first end of the white base cord, which can be connected by sewing.

[0021] (3) The guide cloth and the white base cord enter the drying area, the drafting area, the setting area, and the cooling area of the dipping machine. The guide cloth with the support belt enters the dipping machine and passes through four areas: the drying area, the drafting area, the setting area, and the cooling area, which are set at certain temperatures and tensions to control the guide cloth. The drying area temperature is 140-180℃, the drafting area and the setting area temperature is 200-250℃, and the cooling area is room temperature. The tension ranges of the drying area, the drafting area, the setting area, and the cooling area are 400-4000Kg, 400-7000Kg, 400-7000Kg, and 100-2000Kg, respectively.

[0022] Because the support belt is in a cylindrical shape in the heat treatment area of the dipping machine, the support belt forms support in the width direction during the heat treatment of the guide cloth, which keeps the cloth flat and tight in the width direction and prevents the guide cloth from folding, creasing, and splitting.

[0023] When the support belt is a water injection belt, the water in the water injection belt expands into water vapor and forms support in the width direction during the drying area, the drafting area, and the setting area of the heat treatment area of the dipping machine. The water vapor in the water injection belt cools down to water and shrinks when leaving the heat treatment area.

[0024] (4) The guide cloth is wound into a shape for next use.

[0025] The beneficial effects of the present application are:

[0026] In the present application, the support belt on the guide cloth is in a cylindrical shape during the heat treatment process of the dipping machine, which forms support in the width direction and keeps the cloth flat and tight in the width direction, preventing the guide cloth from folding, creasing, and splitting, thereby increasing the number of uses of the guide cloth and reducing the quality and safety risks. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the support structure for preventing the guide cloth from folding.

[0028] Figure 2 This is a schematic diagram of the guide cloth and pad cloth in the support structure for preventing guide cloth folding according to the present invention.

[0029] Figure 3 This is a schematic diagram of the guide cloth, pad cloth, and support belt in the support structure for preventing guide cloth folding according to the present invention.

[0030] Figure 4 This is a schematic diagram of the water injection belt structure.

[0031] In the diagram, 1 is the guide cloth, 2 is the pad cloth, 3 is the support belt, 31 is the nylon 6 rod, 32 is the water injection belt, 321 is the reverse osmosis burst membrane, 4 is the sewing thread, 5 is the raw curtain fabric, and 6 is the roller. Detailed Implementation

[0032] The present invention will now be described in more detail through specific embodiments to facilitate understanding of the technical solution of the present invention, but this is not intended to limit the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1 As shown, the support structure for preventing the guide cloth from folding in this embodiment includes the guide cloth. In this embodiment, the guide cloth is a cross-shaped structure with evenly distributed warp and weft threads.

[0035] Support strips of nylon 66 rods are fixedly installed above the guide fabric at intervals of 166 to 498 mm. The diameter of the nylon 66 rods is 10 to 50 mm. The nylon 66 rods are cylindrical and will not deform in the heat treatment zone of the impregnation machine. The heat treatment zone includes a drying zone, a stretching zone, and a setting zone. The length of the nylon 66 rods is less than the width of the guide fabric after heat treatment by 2 cm.

[0036] In this embodiment, the nylon 66 rod is fixed to the guide fabric by a padding cloth. Specifically, the padding cloth is sewn onto the top of the guide fabric using multiple stitches, such as... Figure 2 As shown. To ensure a secure stitch, 12 stitches are used. A gap is left between the sewn pad and guide fabric, the size of which matches the outer circumference of the nylon 66 rod, so that the nylon 66 rod can pass through the gap, as shown. Figure 3 As shown.

[0037] Example 2

[0038] This embodiment is basically the same as Embodiment 1, except that the support strip is a polytetrafluoroethylene rod.

[0039] Example 3

[0040] The support structure for preventing the guide cloth from folding of the embodiment comprises a guide cloth. In the embodiment, the guide cloth is a cross structure in which warp and weft are uniformly distributed.

[0041] A water injection belt is fixedly arranged on the guide cloth every 166-498 m. The diameter of the water injection belt is 10-50 mm, and the volume of water in the water injection belt accounts for 0.08%-0.27% of the volume of the cavity in the water injection belt. The length of the water injection belt is less than the width of the guide cloth after heat treatment.

[0042] The water injection belt comprises an inner layer, an intermediate layer and an outer layer. Specifically, the water injection belt is a belt structure formed by heat sealing of the three layers of the inner layer, the intermediate layer and the outer layer. The inner layer is an inner lining prepared by using a polybenzimidazole (PBI) tube, and the intermediate layer and the outer layer are protective layers prepared by weaving polybenzimidazole fiber cloth. The intermediate layer and the outer layer are waterproof, high-temperature resistant and high-pressure resistant. One end of the water injection belt is provided with a water injection hole, and after water injection is completed, the water injection hole is plugged by heat sealing. Figure 4 As shown in the figure, the inner side of the other end of the water injection belt is fixed with a reverse osmosis burst membrane. When passing through the drying, drafting and setting zones of the glue dipping machine, the reverse osmosis burst membrane automatically adjusts the internal pressure of the water injection belt, ensuring safe production.

[0043] In the embodiment, the reverse osmosis burst membrane is fixed by being pasted on the inner side of the water injection belt with glue.

[0044] In the embodiment, the water injection belt is fixed on the guide cloth by a cushion cloth. Specifically, a plurality of sewing lines are used to sew the cushion cloth on the guide cloth. In order to make the sewing firm, the number of sewing needles is 12. After sewing, a gap is left between the cushion cloth and the guide cloth. The size of the gap matches the size of the outer periphery of the water injection belt, so that the water injection belt is arranged in the gap.

[0045] Embodiment 4

[0046] The use method of the support structure for preventing the guide cloth from folding comprises the following contents.

[0047] (1) First, prepare the support structure for preventing the guide cloth from folding.

[0048] Specifically, it comprises:

[0049] ①Sew a cushion cloth on the guide cloth every 166-498 m along the length direction of the guide cloth. When sewing the cushion cloth, there are a plurality of sewing lines between the cushion cloth and the guide cloth. One is to insert the support belt into the gap between the two sewing lines, and the other is to make the cushion cloth and the guide cloth more firmly fixed.

[0050] ②Insert and fix the support belt into the gap between the sewn cushion cloth and the guide cloth. The specific fixing method is to sew the guide cloth and the cushion cloth at both ends of the support belt with sewing lines.

[0051] When the support belt is a water injection belt, before step ②, 0.08% to 0.27% of the volume of the water in the inner cavity of the water injection belt is injected into the water injection port at one end of the water injection belt, and then the water injection port is sealed by heat sealing.

[0052] (2) The end of the guide cloth is connected to the head end of the white base cord fabric, which can be connected by sewing.

[0053] (3) The guide cloth and the white base cord fabric enter the drying area, the drafting area, the setting area, and the cooling area of the dipping machine. The guide cloth with the support belt enters the dipping machine and passes through four areas: the drying area, the drafting area, the setting area, and the cooling area, which are respectively set to control the guide cloth at a certain temperature and tension. The drying area temperature is 1A 144℃ and 1B 150℃, the drafting area is 230℃, the setting area is 230℃, and the cooling area is room temperature. The tension of the drying area, the drafting area, the setting area, and the cooling area is 2000 Kg, 2000 Kg, 1000 Kg, and 200 Kg respectively.

[0054] Since the support belt is in a cylindrical shape in the heat treatment area of the dipping machine, the support belt forms support in the width direction during the heat treatment of the guide cloth, which keeps the cloth flat and taut in the width direction, preventing the guide cloth from folding, creasing, and splitting.

[0055] When the support belt is a water injection belt, the water in the water injection belt expands to form support in the width direction when it is heated to become water vapor in the heat treatment area of the dipping machine. When leaving the heat treatment area, the water vapor in the water injection belt cools down to water and shrinks.

[0056] (4) The guide cloth is wound into a shape for next use.

[0057] Comparison of parameters of different support structures for preventing guide cloth folding:

[0058] The width of the guide cloth used in the examples is 1.5m.

[0059] Tests were conducted on different lengths of guide cloth, different numbers of water injection belts, different interval distances of water injection belts, different volume ratios of water in the inner cavity of the water injection belt, and different diameters of the water injection belt, which are respectively examples 3-1 to 3-8, to observe the reverse osmosis explosion membrane after dipping and the number of uses of the support structure. The specific situation is shown in Table 1.

[0060] Comparative example 1 in Table 1 is a guide cloth without a cushion cloth and a support belt. Comparative example 2 is basically the same as example 1, except that the support belt is a nylon 6 rod. The support belt used in example 1 is a nylon 66 rod, and the support belt used in examples 2-1 to 2-3 is a polytetrafluoroethylene rod. The melting point of the support belt used in the comparative example and the example is as follows: polytetrafluoroethylene rod > nylon 66 rod > nylon 6 rod.

[0061] The test results in Table 1 show that the nylon 6 rod of Comparative Example 2 is softened at high temperatures in the drawing zone and the setting zone due to the low solution boiling point, and is pressed into a sheet shape after the extrusion roller, and cannot form support in the width direction of the guide cloth, and thus cannot keep the width direction of the cloth flat and tight, and instead affects the use frequency of the guide cloth. The support belts of Example 1 and Example 2 have a high melting point, and the use frequency is increased compared to Comparative Example 1, and thus the support belt with a high melting point can increase the use frequency of the guide cloth.

[0062] Table 1 Use of different support structures

[0063]

[0064] The guide cloth provided with the water injection belt is used in the heat treatment process of the glue dipping machine, the water injection belt is heated and expanded to form support in the width direction of the guide cloth, and the width direction of the cloth is kept flat and tight, and the use frequency is increased. Compared with Comparative Example 1 and Examples 3-1 to 3-3, the guide cloth is provided with water injection belts with the same diameter, and 0.08 to 0.27% of water (the internal part of the water injection belt can withstand a pressure of ≤0.6 MPa) is injected into the internal cavity of the water injection belt, and the use frequency of the guide cloth is increased. Under the condition of ensuring the diameter of the water injection belt and the amount of water injection, it can be concluded from the comparison of Examples 3-4 to 3-11 that the water injection belt is fixedly arranged every 166 to 498 m above the guide cloth, and the use frequency of the guide cloth is increased. In particular, the water injection belt is fixedly arranged every 166 m above the guide cloth, and the use effect of the water injection belt is the best, and the use frequency of the guide cloth is the highest.

[0065] The above-described examples are only preferred embodiments of the present application and do not limit the scope of the application. Any equivalent changes or modifications made in accordance with the structure, features and principles described in the patent scope of the present application should be included in the patent scope of the present application.

Claims

1. A support structure for preventing the folding of a guide cloth (1), characterized in that, The support belt (3) is fixed on the guide cloth (1) every 166-498 m, the diameter of the support belt (3) is 10-50 mm, the support belt (3) is in a cylindrical shape in the heat treatment area of the dipping machine, the heat treatment area includes a drying area, a drawing area and a setting area; the length of the support belt (3) is not greater than the width of the guide cloth (1) after heat treatment; The support belt (3) is a water injection belt (32), the volume of water in the water injection belt (32) accounts for 0.08%-0.27% of the volume of the inner cavity of the water injection belt (32), and the inner side of one end of the water injection belt (32) is fixedly provided with a reverse osmosis burst membrane (321); when the water injection belt is in the drying area, the drawing area and the setting area of the heat treatment area of the dipping machine, the water in the water injection belt is heated to become water vapor and expand to form support in the width direction.

2. The support structure according to claim 1, wherein The length of the guide cloth (1) is 500-1500 m.

3. The support structure according to claim 1, wherein The water injection belt (32) includes an inner layer, an intermediate layer and an outer layer, the inner layer is an inner lining prepared by using a polybenzimidazole tube, and the intermediate layer and the outer layer are protective layers woven by polybenzimidazole fiber cloth.

4. The support structure of claim 1, wherein, The water injection belt (32) is a belt structure formed by heat sealing the three layers of the inner layer, the intermediate layer and the outer layer, one end of the water injection belt (32) is provided with a water injection hole, and the water injection hole is sealed by heat sealing after water injection, and the inner side of the other end of the water injection belt (32) is fixedly provided with a reverse osmosis burst membrane (321).

5. The support structure of claim 1, wherein, The support belt (3) is sewn on the guide cloth (1).

6. The support structure of claim 1, wherein, The support belt (3) is sewn on the guide cloth (1).

7. The method of using a support structure to prevent the folding of a guide cloth of claim 1, wherein, The following is included: (1) first prepare the support structure for preventing the guide cloth from folding as claimed in claim 1; (2) connect the end of the guide cloth with the first end of the white base cord; (3) the guide cloth and the white base cord enter the drying area, the drawing area, the setting area and the cooling area of the dipping machine; (4) the guide cloth is wound into a shape for next use.

8. The method of using a support structure to prevent the folding of a guide cloth according to claim 7, wherein, Step (1) specifically includes: ① Sew a pad cloth on the guide cloth every 166-498 m along the length direction of the guide cloth; ② Insert and fix the support belt into the gap between the sewn pad cloth and the guide cloth; When the support belt is a water injection belt, before step ②, inject 0.08%-0.27% of the volume of the inner cavity of the water injection belt into the water injection port of one end of the water injection belt, and then seal the water injection port by heat sealing.

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