A double-sided raising device for a band blank of a circular knitting machine

Abstract

The utility model discloses a kind of double-sided raising device of band blank of circular weaving machine, be set to the opening of circular weaving machine body, for the inner and outer surface of band blank is polished, the double-sided raising device of band blank of circular weaving machine includes: inner layer abrasive disc piece, fixed in the inside of the opening, for the inner surface of the band blank is polished;Outer layer abrasive disc piece, fixed to the outside below of the opening, for the outer surface of the band blank is polished;Wherein, the working surface of the inner layer abrasive disc piece and outer layer abrasive disc piece respectively with the inner and outer surface of the band blank form transition cooperation, realize in the band blank weaving forming process synchronous completion double-sided raising.This utility model provides raising device by setting inner and outer abrasive disc piece in the opening of circular weaving machine, realize in weaving process synchronous completion band blank inner and outer surface raising processing.

Description

Technical Field

[0001] This utility model relates to the field of textile weaving equipment technology, and in particular to a double-sided napping device for a circular loom. Background Technology

[0002] In the field of trenchless pipeline repair technology, it is common practice to use braided strip blanks as a reinforcing layer to make rubber hoses as inner linings for repairing aging original pipelines. The strip blanks are mainly used to bear the pipeline load. The strip blanks (braided layer) are the core base components of the rubber hose product. Their main function is to provide structural support for the rubber hose and to form a stable bond with the rubber and plastic layers on the inner and outer sides of the rubber hose to ensure the overall mechanical properties and service life of the rubber hose.

[0003] In existing technologies, the preform is typically made of one or more materials selected from nylon, filament, and polyester, forming the warp and weft threads. These threads are then interwoven into a tubular structure using a circular loom, resulting in a smooth fabric surface. However, this smooth surface structure leads to extremely poor adhesion between the preform and the inner and outer rubber-plastic layers of the hose, resulting in low peel strength that fails to meet the usage requirements of hose products. To address this issue, existing processes require an additional grinding process on the inner and outer surfaces of the preform after weaving to increase its surface roughness and thus enhance the adhesion strength with the rubber-plastic layers.

[0004] The aforementioned existing technology has obvious drawbacks: on the one hand, the additional grinding process increases the production process of the hose and prolongs the production cycle. At the same time, it requires the investment of special grinding equipment and corresponding manual operation, which increases the production cost. On the other hand, the subsequent separate grinding process is prone to uneven grinding of the blank surface, making it difficult to ensure the stability of the blank surface treatment quality, thereby affecting the consistency and reliability of the hose products.

[0005] Therefore, there is an urgent need in this field for a technical solution that can be integrated into the weaving process to improve the surface roughness of the strip blank without the need for separate subsequent processing. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a double-sided napping device for a circular loom, so as to realize the simultaneous napping treatment of the inner and outer surfaces of the strip during the weaving process.

[0007] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0008] A double-sided napping device for a circular loom fabric is disposed at the opening of the circular loom body and is used to polish the inner and outer surfaces of the fabric. The double-sided napping device for the circular loom fabric includes:

[0009] The inner grinding wheel is fixed inside the opening and is used to grind the inner surface of the blank.

[0010] The outer grinding wheel is fixed to the lower outer side of the opening and is used to grind the outer surface of the blank.

[0011] The working surfaces of the inner and outer grinding wheels respectively form a transition fit with the inner and outer surfaces of the blank.

[0012] According to one aspect of the present invention, the inner grinding wheel includes a grinding wheel base and an annular grinding wheel fixed on the grinding wheel base. The working surface of the inner grinding wheel is the outer circumferential surface of the annular grinding wheel, and the outer circumferential surface is inlaid or fixed with outer circumferential diamond abrasive grains.

[0013] According to one aspect of the present invention, the inner grinding wheel is fixed inside the opening by an adjustable bracket, and the outer diameter of the inner grinding wheel forms a transition fit with the inner diameter of the blank.

[0014] According to one aspect of the present invention, the grinding wheel base has a mounting hole, the adjustable bracket has a connecting rod, the lower end of the connecting rod passes through the mounting hole and is fixed by a fastening device.

[0015] According to one aspect of the present invention, the outer grinding wheel has an annular structure, and its working surface is the inner circumferential surface of the outer grinding wheel, wherein inner circumferential diamond abrasive grains are embedded or fixed on the inner circumferential surface.

[0016] According to one aspect of this utility model, the outer grinding wheel is installed below the opening by a fixing mechanism, and the inner diameter of the outer grinding wheel forms a transition fit with the outer diameter of the blank.

[0017] According to one aspect of the present invention, the inner grinding wheel is detachably connected to the adjustable bracket, and the outer grinding wheel is detachably connected to the fixing mechanism.

[0018] According to one aspect of the present invention, the double-sided napping device for the circular loom further includes a traction machine, the control end of which is electrically connected to a frequency converter. The contact time between the strip and the grinding wheel is controlled by adjusting the traction speed, thereby adjusting the degree of napping.

[0019] According to one aspect of this utility model, the inner annular channel of the outer grinding wheel is coaxially arranged with the annular channel of the opening to ensure full contact between the outer wall of the blank and the working surface of the outer grinding wheel.

[0020] According to one aspect of this utility model, the particle size of the outer circumferential diamond abrasive grains of the inner grinding wheel and the inner circumferential diamond abrasive grains of the outer grinding wheel can be adjusted according to the material of the blank and the requirements for roughening.

[0021] The advantages of this utility model are as follows: First, this utility model directly integrates the napping device into the opening of the circular loom, allowing weaving and surface napping treatment to be completed simultaneously on the same equipment and in the same process flow, simplifying the production process and significantly improving production efficiency. Second, through the unique layout of the inner and outer grinding wheels, the inner and outer surfaces of the strip blank can be uniformly and controllably polished simultaneously, ensuring consistent napping effect and providing an ideal rough surface for subsequent composite processes. Third, after treatment by this device, the peel strength between the strip blank and the rubber-plastic layer is increased from 100N / 25mm in the traditional process to 180N / 25mm, meeting the performance requirements of high-end rubber hose products. Fourth, the device has a simple structure and can be implemented simply by adding grinding wheels to the opening of the existing circular loom, without the need for large-scale modification of the circular loom. It is convenient to implement, low in cost, and easy to promote and apply on existing production lines. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the installation method of the double-sided napping device of the present invention on a circular loom;

[0024] Figure 2 This is a schematic diagram of the structure of the inner grinding wheel of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the outer grinding wheel of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the braided layer described in this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Figure 1 This diagram illustrates the installation method of the double-sided napping device with fabric blank of this invention on a circular loom. Figure 1As shown, the device is installed on the circular loom body 100 with an opening 101, and includes an inner grinding wheel 200 and an outer grinding wheel 300.

[0029] It should be noted that the opening 101 is fixedly installed at the discharge end of the circular loom body 100, specifically located below the weaving mechanism of the circular loom, and is used to guide the strip blank 400 (the strip blank 400 is strip-shaped, such as...). Figure 4 As shown, the opening 101 is a key part for the forming and sizing of the strip blank 400. The inner wall of the opening 101 forms a precise annular channel. Under the traction of the external traction mechanism, the woven cylindrical strip blank 400 passes through this channel and is shaped by it, thereby obtaining stable dimensions that meet the design requirements.

[0030] Therefore, after the circular loom completes the interlacing weaving of the strip 400, the opening 101 is the key channel through which the strip 400 leaves the circular loom body 100 after being woven. All components of the raising device of this utility model are located on this channel, directly acting on the strip 400 passing through it. This allows for the simultaneous raising of the inner and outer surfaces of the strip 400 at the very first moment of its weaving formation, integrating the weaving and surface raising processes into a continuous and efficient workflow.

[0031] The specific setup is as follows: the inner grinding wheel 200 is fixed inside the opening 101 by an adjustable bracket; the outer grinding wheel 300 is installed on the lower outer side of the opening 101 by a fixing mechanism.

[0032] like Figure 2 As shown, the inner grinding wheel 200 includes a grinding wheel base 201 and a grinding wheel 202 fixed on the grinding wheel base 201. The grinding wheel 202 is fixedly connected to the grinding wheel base 201 through a detachable connection structure. The grinding wheel 202 has a ring structure and is replaceable.

[0033] The grinding wheel base 201 has two symmetrically arranged mounting holes 203. Two connecting rods 103 on the adjustable bracket 102 extend from above into the opening 101. The lower ends of the connecting rods 103 pass through the mounting holes 203 of the grinding wheel base 201 and are then fixed by a fastening device, thereby fixing the inner grinding wheel 200 inside the opening 101 of the circular loom body 100. When it is necessary to replace the inner grinding wheel 200, it can be removed from the adjustable bracket 102. At the same time, the adjustable bracket 102 can adjust the installation height of the inner grinding wheel 200 to adapt to different napping requirements.

[0034] The inner grinding wheel 200 has outer circumferential diamond abrasive grains 204 embedded or fixed on its working surface (i.e., the outer circumferential surface). During operation, these hard and sharp abrasive grains directly perform micro-cutting and grinding on the inner wall of the blank 400, thereby achieving a roughening effect.

[0035] like Figure 3 As shown, the outer grinding wheel 300 is an annular grinding wheel with an inner hole, and is detachably mounted on the lower outer side of the opening 101 via a fixing mechanism. The inner annular channel of the outer grinding wheel 300 is coaxially arranged with the annular channel of the opening 101, and the working surface (i.e., the inner circumferential surface) of the grinding wheel is inlaid or fixed with inner circumferential diamond abrasive grains 301. During operation, these abrasive grains form an annular grinding surface. When the blank 400 passes downward, its outer surface will continuously rub against these abrasive grains, thereby achieving roughening of the outer surface.

[0036] The grinding wheel is fixedly installed below the opening 101 of the circular loom body 100. It is positioned on the path that the strip 400 must take after leaving the opening, and its inner ring channel is precisely aligned with the descending strip, ensuring that the outer wall of the strip can fully contact the abrasive layer on the inner circumference of the grinding wheel.

[0037] The particle size of the outer circumferential diamond abrasive grains 204 of the inner grinding wheel 200 and the inner circumferential diamond abrasive grains 301 of the outer grinding wheel 300 can be adjusted according to the material of the blank 400 and the requirements for roughening. This utility model does not impose any special limitations.

[0038] In this embodiment of the utility model, the outer diameter of the inner grinding wheel 200 and the inner diameter of the outer grinding wheel 300 are precisely designed to form a transition fit with the outer diameter of the woven strip blank 400.

[0039] In this embodiment of the invention, the outer diameter of the inner grinding wheel 200 and the inner diameter of the outer grinding wheel 300 are precisely designed to ensure a smooth transition fit between the working surface of the inner grinding wheel 200 and the inner diameter of the blank 400, and between the working surface of the outer grinding wheel 300 and the outer diameter of the blank 400. This allows the inner grinding wheel 200 to be precisely embedded inside the blank 400, forming a tight-fitting structure with the outer grinding wheel 300 over the blank 400.

[0040] This transitional fit method can ensure that the grinding wheel (including the inner grinding wheel 200 and the outer grinding wheel 300) and the surface of the blank 400 maintain a continuous and stable grinding pressure, so as to achieve uniform roughening of the inner and outer surfaces of the blank 400. It can also avoid the blank from jamming or excessive wear due to excessive tightness, thus ensuring continuous and stable production.

[0041] In this embodiment of the present invention, both the inner grinding wheel 200 and the outer grinding wheel 300 in the napping device are modular structures and can be flexibly replaced according to process requirements. When it is necessary to produce strip blanks 400 of different diameters, the operator will replace them with grinding wheels that form a transition fit with the inner / outer diameter of the new diameter strip blank. This ensures that the best and most consistent napping effect can be obtained for any specification of product.

[0042] The double-sided napping device for the strip fabric of this utility model also includes a traction machine 500. The traction machine 500 is installed below the opening 101 at the discharge end of the circular loom body 100, precisely corresponding to the end of the discharge path of the strip fabric 400 after it is woven and formed, passing through the opening 101, and providing a stable vertical downward traction force for the strip fabric 400.

[0043] The input end of the traction machine 500 is directly and fixedly connected to the output end of the strip through a clamping, sleeve or rolling adaptation structure, ensuring that the strip can move smoothly in the preset direction under the driving force of the traction machine, and avoiding deviation or slippage.

[0044] Simultaneously, the control terminal of the traction machine 500 is electrically connected to the frequency converter. The traction speed of the traction machine 500 directly determines the contact time between the strip blank 400 and the grinding wheel. The faster the speed, the shorter the contact time and the smaller the grinding amount; the slower the speed, the longer the contact time and the greater the grinding amount. The traction speed can be preset and dynamically adjusted through the frequency converter to adapt to the production needs of strip blanks with different diameters and different weaving processes, ensuring that the strip blank can achieve sufficient and uniform contact grinding between the inner and outer surfaces and the grinding wheels at an appropriate speed when passing through the inner grinding wheel 200 and the outer grinding wheel 300.

[0045] The working process of this utility model's double-sided napping device for strip blanks is as follows: The woven strip blank 400, under the pulling force of the traction machine, moves continuously downwards at a speed of approximately 300-320 meters per 24 hours. When the strip blank 400 passes through the opening 101, its inner surface rubs against the outer circumferential diamond abrasive grains 204 on the inner grinding wheel 200, and its outer surface rubs against the inner circumferential diamond abrasive grains 301 on the outer grinding wheel 300. During this process, the inner and outer surfaces of the strip blank 400 are simultaneously polished, forming a uniform napped, velvety structure.

[0046] The surface roughness of the strip blank 400 after processing by this roughening device is significantly increased. When this strip blank 400 is used as the base material for hose products, the inner and outer rubber-plastic layers penetrate and embed into these roughened structures during the molding process, forming a strong mechanical interlocking force. According to actual tests, the peel strength of the strip blank can be increased from approximately 100 N / 25 mm on the smooth surface to approximately 180 N / 25 mm after roughening, representing a performance improvement of approximately 80%.

[0047] The advantages of this utility model are as follows: First, this utility model directly integrates the napping device into the opening of the circular loom, allowing weaving and surface napping treatment to be completed simultaneously on the same equipment and in the same process flow, simplifying the production process and significantly improving production efficiency. Second, through the unique layout of the inner and outer grinding wheels, the inner and outer surfaces of the strip blank can be uniformly and controllably polished simultaneously, ensuring consistent napping effect and providing an ideal rough surface for subsequent composite processes. Third, after treatment by this device, the peel strength between the strip blank and the rubber-plastic layer is increased from 100N / 25mm in the traditional process to 180N / 25mm, meeting the performance requirements of high-end rubber hose products. Fourth, the device has a simple structure and can be implemented simply by adding grinding wheels to the opening of the existing circular loom, without the need for large-scale modification of the circular loom. It is convenient to implement, low in cost, and easy to promote and apply on existing production lines.

[0048] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. For example, the specific grit size, installation angle, and traction speed of the diamond grinding wheel can all be adjusted according to the material and specific requirements of the blank. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A double-sided napping device for a circular loom, disposed at the opening (101) of the circular loom body (100), for polishing the inner and outer surfaces of the strip (400), characterized in that, The circular loom's double-sided napping device includes: The inner grinding wheel (200) is fixed inside the opening (101) and is used to grind the inner surface of the blank (400); The outer grinding wheel (300) is fixed to the lower outer side of the opening (101) and is used to grind the outer surface of the blank (400); The working surfaces of the inner grinding wheel (200) and the outer grinding wheel (300) respectively form a transition fit with the inner and outer surfaces of the strip blank (400).

2. The double-sided napping device for a circular loom according to claim 1, characterized in that, The inner grinding wheel (200) includes a grinding wheel base (201) and an annular grinding wheel (202) fixed on the grinding wheel base (201). The working surface of the inner grinding wheel (200) is the outer circumferential surface of the annular grinding wheel (202), and the outer circumferential surface is inlaid or fixed with outer circumferential diamond abrasive grains (204).

3. The double-sided napping device for a circular loom according to claim 2, characterized in that, The inner grinding wheel (200) is fixed inside the opening (101) by an adjustable bracket (102), and the outer diameter of the inner grinding wheel (200) and the inner diameter of the blank (400) form a transition fit.

4. The double-sided napping device for a circular loom according to claim 3, characterized in that, The grinding wheel base (201) has a mounting hole (203), and the adjustable bracket (102) has a connecting rod (103). The lower end of the connecting rod (103) passes through the mounting hole (203) and is fixed by a fastening device.

5. The double-sided napping device for a circular loom according to claim 1, characterized in that, The outer grinding wheel (300) has a ring structure, and its working surface is the inner circumferential surface of the outer grinding wheel (300). The inner circumferential surface is inlaid or fixed with inner circumferential diamond abrasive grains (301).

6. The double-sided napping device for a circular loom according to claim 1, characterized in that, The outer grinding wheel (300) is installed below the opening (101) by a fixing mechanism, and the inner diameter of the outer grinding wheel (300) forms a transition fit with the outer diameter of the blank (400).

7. The double-sided napping device for a circular loom according to claim 1, characterized in that, The inner grinding wheel (200) is detachably connected to the adjustable bracket (102), and the outer grinding wheel (300) is detachably connected to the fixing mechanism.

8. The double-sided napping device for a circular loom according to claim 1, characterized in that, The circular loom's double-sided napping device also includes a traction machine (500). The control end of the traction machine (500) is electrically connected to a frequency converter. By adjusting the traction speed, the contact time between the strip (400) and the grinding wheel is controlled, thereby adjusting the napping degree.

9. The double-sided napping device for a circular loom according to any one of claims 1 to 8, characterized in that, The inner ring channel of the outer grinding wheel (300) is coaxially arranged with the annular channel of the opening (101) to ensure that the outer wall of the blank (400) is in full contact with the working surface of the outer grinding wheel (300).

10. The double-sided napping device for a circular loom according to claim 2 or 5, characterized in that, The particle size of the outer circumferential diamond abrasive grains (204) of the inner grinding wheel (200) and the inner circumferential diamond abrasive grains (301) of the outer grinding wheel (300) can be adjusted according to the material of the blank (400) and the requirements for roughening.

Images