Polyester thread bundle adhesive tape pretreatment equipment and oil removal method thereof

Abstract

A pretreatment device and degreasing method for polyester wire harness tape, relating to the field of wire harness tape technology, addresses the shortcomings of existing degreasing processes for polyester filaments in polyester wire harness tapes before adhesive coating, such as unsatisfactory degreasing effect, easy residue of wastewater during the degreasing process, and large wastewater discharge. The device includes a coarse washing tank, an immersion and dissolving tank, a cleaning tank, a drying box, and an ironing mechanism located between the unwinding and rewinding rollers for the polyester filaments to pass through sequentially. Through coarse washing for layered impurity removal and sealed high-temperature gradient immersion and dissolving, the utilization rate of the degreasing working solution is effectively improved. During the upward inclined conveyor belt transport of the polyester filaments in the cleaning tank, spray pipes spray the polyester filaments, while a negative pressure mechanism below adsorbs them, thereby achieving low-pressure, high-efficiency removal of residual wastewater and impurities from the polyester filaments, with low water consumption and energy saving and environmental protection. This fundamentally improves the adhesive bonding performance and finished product quality of the wire harness tape.

Description

Technical Field

[0001] This invention relates to the field of wire harness tape technology, specifically to a degreasing device and method for polyester yarn fabric before applying adhesive to polyester wire harness tape. Background Technology

[0002] Polyester wire harness tape uses polyester yarn as its base material and is widely used for bundling electrical wire harnesses in vehicles and industries, providing abrasion protection, insulation, and noise reduction. During the spinning and weaving processes of the polyester yarn in the tape, special spinning oil and weaving lubricant are added to improve fiber lubricity, antistatic properties, and prevent flyaways and filament breakage. This results in a large amount of oily residue remaining on the surface of the polyester yarn and in the fiber gaps after molding. As the core base material of the wire harness tape, the residual oil on the polyester yarn surface can easily cause quality defects such as adhesive layer peeling, poor adhesion, bubbling, and delamination in subsequent adhesive coating processes. This seriously affects the bonding stability, smoothness, weather resistance, and service life of the wire harness tape. Therefore, the degreasing and smoothing process of the yarn is a crucial pretreatment step in the production of wire harness tape.

[0003] Currently, the main methods for degreasing polyester wire harness tape and gauze in the industry are static soaking and single high-pressure water spray rinsing, which have many technical shortcomings. First, static soaking relies solely on the natural dissolution of oil stains by the washing liquid, lacking a gradient layering cleaning structure. This results in poor penetration and dissolution of deep-seated oil stains within the fibers, insufficient uniformity of degreasing, and a high likelihood of localized oil residue. Second, conventional rinsing structures lack negative pressure adsorption for water and impurity removal. Simply spraying the surface results in inadequate degreasing, and wastewater and residual oil easily remain inside the gauze mesh, leading to secondary adhesion and pollution, and resulting in large wastewater discharge volumes. Third, traditional equipment uses a flat layout, requiring a large floor space, lacking a layered and compact structure, resulting in low automation and an inability to achieve continuous operation. Fourth, the production efficiency of automated production lines is low; polyester yarn is prone to weft shrinkage and narrowing during high-temperature chemical immersion and wet conveying, resulting in wrinkles on the fabric surface. Conventional equipment lacks a widening structure, and the wrinkled areas form cleaning dead zones, which also directly affect the uniformity of subsequent adhesive coating; fifth, existing equipment lacks a dedicated ironing and shaping structure, which further exacerbates the wrinkling problem of yarn after washing and drying; sixth, the traditional cleaning method of spray rinsing is simple and cannot achieve rapid separation and discharge of wastewater, resulting in serious waste of water resources and making it difficult to meet the production needs of large-scale, high-quality wire harness tapes. Summary of the Invention

[0004] In summary, the purpose of this invention is to address the shortcomings of existing polyester wire harness tapes, such as unsatisfactory degreasing effect, easy residue of wastewater during the degreasing process, and large wastewater discharge volume, in the pretreatment process of polyester wire harness tapes. Therefore, this invention proposes a pretreatment device and degreasing method for polyester wire harness tapes.

[0005] To address the shortcomings of the technology proposed in this invention, the following technical solution is adopted: A pretreatment device for polyester yarn harness tape, characterized in that the device includes a coarse washing tank, an immersion and dissolving tank, a washing tank, a drying box, and an ironing mechanism disposed between an unwinding roller and a take-up roller for the polyester yarn to pass through sequentially; the coarse washing tank is equipped with a first heating device for heating the first washing liquid in the coarse washing tank to 50-60℃, a first guide roller disposed below the liquid level, and a first extrusion roller group disposed above the liquid level; the immersion and dissolving tank adopts a sealed structure and is equipped with a second heating device for heating the degreasing working liquid to 80-100℃, and an S-shaped roller group for driving the polyester yarn back and forth with the degreasing working liquid; the washing tank is equipped with a conveyor belt mechanism, a spray pipe, and a negative pressure mechanism; the conveyor belt mechanism is lower at the inlet end and higher at the outlet end. The inclined structure is set inside the cleaning tank, and the belt body of the conveyor belt mechanism is a perforated belt body or a mesh belt body; the spray pipe is set above the conveyor belt mechanism; the negative pressure mechanism includes a negative pressure hood with a top opening and a negative pressure host connected to the air extraction port of the negative pressure hood; the negative pressure hood is located between the two support rollers of the conveyor belt mechanism, and the top opening is in close contact with the inner surface of the belt body of the conveyor belt mechanism; the air extraction port of the negative pressure hood is located above the liquid level line in the tank, and a drain outlet is provided at the bottom of the negative pressure hood below the liquid level line in the tank; the drying box uses a hot air mechanism to heat the passing polyester yarn; the ironing mechanism includes a heating roller and two shaping guide rollers that guide the polyester yarn output from the drying box to be wrapped on the heating roller.

[0006] The technical features that further define the present invention include: The rough washing tank is provided with two or more sets of first extrusion rollers, and a tank cavity partition plate is provided below each set of first extrusion rollers in the rough washing tank.

[0007] The soaking and dissolving tank is stacked on top of the coarse washing tank via a frame.

[0008] The soaking and dissolving tank includes multiple layers of soaking and dissolving tanks stacked on top of each other, with the concentration of the degreasing working solution decreasing layer by layer from bottom to top.

[0009] The negative pressure hood is equipped with an air guide pipe that is connected to the air extraction interface, and the bottom of the air guide pipe has several air inlets.

[0010] The cleaning tank is also equipped with a third guide roller and a third extrusion roller group located above the liquid level line in the tank; the third guide roller is located on the discharge end side of the conveyor belt mechanism and its height is lower than the output end of the conveyor belt mechanism and the third extrusion roller group.

[0011] It also includes an expansion roller, which is arranged between the gauze outlet end of the soaking and dissolving tank and the feed end of the washing tank.

[0012] The expanding roller is a bidirectional threaded expanding roller, and the surface of the expanding roller is provided with a bidirectional spiral spreading pattern.

[0013] This invention discloses a method for degreasing polyester wire harness tape, implemented using the aforementioned polyester wire harness tape pretreatment equipment, comprising the following steps: Step 1: Equipment preheating and debugging; control the liquid level of the first cleaning solution in the coarse washing tank within the preset range and heat the temperature of the first cleaning solution to 50-60℃; control the liquid level of the degreasing working solution in the soaking and dissolving tank within the preset range and heat the temperature of the degreasing working solution to 80-100℃; adjust the spray pressure of the spray pipes in the cleaning tank and the negative pressure suction of the negative pressure mechanism, and turn on the drying box and ironing mechanism for preheating; Step 2: After the polyester yarn is output by the unwinding roller, it enters the coarse washing tank, is introduced into the first cleaning liquid by the first guide roller, and then squeezed by the first extrusion roller group to remove the floating oil and impurities on the surface of the polyester yarn. Step 3: After coarse washing, the gauze enters the sealed soaking and dissolving tank. It is driven by S-shaped roller group to reciprocate and transport the liquid in a roundabout way. Relying on the high temperature working liquid with gradient concentration, the deep oil stains on the steamed polyester yarn are fully dissolved and removed. Step 4: After the polyester yarn cloth is sent out of the soaking and dissolving tank, it enters the cleaning tank. During the upward conveying process of the conveyor belt mechanism in the cleaning tank, the second cleaning liquid is sprayed onto the polyester yarn cloth by the spray pipe. At the same time, the negative pressure mechanism below adsorbs the liquid. The second cleaning liquid passes through the polyester yarn cloth, carrying away the residual sewage and impurities. After squeezing out the second cleaning liquid from the polyester yarn cloth, it is output to the drying box. Step 5: When the polyester yarn fabric passes through the drying box, it is dried evenly with hot air to remove residual moisture from the polyester yarn fabric. Step 6: After drying, the polyester yarn is guided by shaping guide rollers and wrapped around the surface of the heating roller for pressing and ironing to eliminate wrinkles, making the fabric flat and firm. Finally, it is wound up by the take-up roller.

[0014] Furthermore, at the yarn outlet of the soaking and dissolving tank, the polyester yarn after soaking and cleaning is first stretched and expanded to the left and right sides by the spreading roller before being transferred into the cleaning tank.

[0015] The beneficial effects of this invention are as follows: This invention effectively improves the utilization rate of the degreasing working solution through coarse washing and layered impurity removal, and sealed high-temperature gradient immersion dissolution. During the upward conveyor belt transport of the polyester yarn in the cleaning tank, spray pipes spray the polyester yarn, while a negative pressure mechanism adsorbs it from below, thereby achieving efficient removal of residual wastewater and impurities from the polyester yarn with low water pressure. This results in low water consumption and energy conservation and environmental protection. The integrated design of hot air drying and roller pressing thoroughly removes surface and deep-seated oil stains from the polyester yarn. The use of widening rollers eliminates wrinkles in the wet yarn, prevents fabric shrinkage, eliminates cleaning dead corners, and reduces the floor space occupied by the layered layout of the tank, achieving fully automated continuous operation and fundamentally improving the adhesive bonding performance and finished product quality of the wire harness tape. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the coarse washing tank and the soaking and dissolving tank of the polyester wire harness tape pretreatment equipment of the present invention; Figure 2 This is a schematic diagram of the cleaning tank, drying box, and ironing mechanism of the polyester wire harness tape pretreatment equipment of the present invention. Figure 3 This is a three-dimensional structural diagram of the cleaning tank portion of the present invention; Figure 4 This is an exploded structural diagram of the conveyor belt mechanism of the present invention; Figure 5 This is a front view structural diagram of the cleaning tank portion of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0018] Reference Figures 1 to 5 As shown in the figure, the polyester wire harness tape pretreatment equipment disclosed in this invention includes a coarse washing tank 3, an immersion and dissolving tank 4, a washing tank 5, a drying box 6, and an ironing mechanism 7, which are arranged between the unwinding roller 1 and the winding roller 2 for the polyester yarn 10 to pass through in sequence.

[0019] The main function of the coarse washing tank 3 is to remove relatively easy-to-remove surface oil, dust, and impurities from the polyester yarn fabric 10. These surface oil, dust, and impurities are the main source of contamination in the degreasing working solution of the soaking and dissolving tank 4. This invention, by coarsely washing the polyester yarn fabric 10 in the coarse washing tank 3 before transferring it to the soaking and dissolving tank 4, can slow down the degreasing working solution's expiration time and extend its service life. The coarse washing tank 3 is equipped with a first heating device to heat the first cleaning solution in the coarse washing tank to 50-60°C, a first guide roller 31 located below the liquid level, and a first squeezing roller group 32 located above the liquid level. The polyester yarn fabric 10 is introduced into the first cleaning solution through the first guide roller 31 and then squeezed and removed by the first squeezing roller group 32.

[0020] In the specific implementation process, the preferred solution is as follows: the coarse washing tank 3 is equipped with two or more sets of first extrusion roller groups 32, and a tank partition plate 33 is provided below each set of first extrusion roller groups 32 in the coarse washing tank 3; the tank partition plate 33 can divide the coarse washing tank 3 into multiple independent chambers connected in series, and the first cleaning fluid of each chamber can be replaced without stopping the equipment. Different first cleaning fluid replacement cycles can be set for each chamber to improve the utilization rate of the first cleaning fluid. The first cleaning fluid can be Na2CO3 with a concentration of 1.5 to 3 g / L, and the concentration of the first cleaning fluid is higher in the chamber closer to the feed end.

[0021] The soaking and dissolving tank 4 is mainly used to dissolve and remove stubborn oil stains on the polyester yarn fabric 10. The present invention mainly adopts a relatively sealed environment in which the polyester yarn fabric absorbs the degreasing working liquid in the soaking and dissolving tank 4 and then undergoes high-temperature steaming to fully dissolve and peel off the deep oil stains on the polyester yarn fabric. That is, the soaking and dissolving tank adopts a sealed structure, which is equipped with a second heating device to heat the degreasing working liquid to 80-100°C, and an S-shaped roller group to drive the polyester yarn fabric back and forth with the degreasing working liquid.

[0022] Because the reaction time required for the thorough dissolution and removal of deep-seated oil stains from polyester yarn fabric during high-temperature steaming is relatively long, the polyester yarn fabric needs to remain in the soaking and dissolving tank 4 for a relatively long time. Therefore, the soaking and dissolving tank 4 requires a large space. In specific implementation, to save on the floor space of the equipment, the preferred solution is that the soaking and dissolving tank 4 is stacked on top of the coarse washing tank 3 via a frame. The soaking and dissolving tank 4 comprises multiple layers stacked vertically, with the concentration of the degreasing working solution decreasing layer by layer from bottom to top. This structure of the present invention not only solves the problem of large equipment floor space but also allows for different replacement cycles of the degreasing working solution in each layer of the soaking and dissolving tank 4, ensuring full utilization of the degreasing working solution and, most importantly, preventing oil re-adhesion.

[0023] The main function of the cleaning tank 5 is to remove residual oil stains and degreasing working fluid from the polyester yarn fabric using a second cleaning solution. The second cleaning solution can be clean water. This invention differs from current high-pressure water jet rinsing; instead, it uses relatively low-pressure spray water in conjunction with a negative pressure mechanism for adsorption, achieving water-saving and efficient cleaning. Specifically, the cleaning tank 5 includes a conveyor belt mechanism 51, a spray pipe 52, and a negative pressure mechanism 53. The conveyor belt mechanism 51 is installed in the cleaning tank 5 with an inclined structure, lower at the inlet and higher at the outlet. The belt body of the conveyor belt mechanism 51 is a perforated belt or a mesh belt. The spray pipe 52 is located above the conveyor belt mechanism 51. The negative pressure mechanism 53 includes a negative pressure hood with a top opening and a negative pressure main unit connected to the negative pressure hood's exhaust port. The negative pressure hood is positioned between the two support rollers of the conveyor belt mechanism, and its top opening is fitted to the inner surface of the belt body of the conveyor belt mechanism 51.

[0024] When the negative pressure host is running, the opening of the negative pressure hood is covered by the conveyor belt body and polyester yarn cloth of the conveyor belt mechanism 51. The clean water sprayed on the surface of the polyester yarn cloth can quickly pass through the polyester yarn cloth and the conveyor belt body under atmospheric pressure, thereby achieving low water pressure and high efficiency to remove residual sewage and impurities from the polyester yarn cloth. It consumes less water and is energy-saving and environmentally friendly.

[0025] In the specific implementation process, the conveyor belt mechanism 51 can adopt a passive transmission mechanism without a power source. When the polyester yarn is tightly attached to the belt body of the conveyor belt mechanism 51 under the negative pressure of the negative pressure mechanism 53, the conveying movement of the polyester yarn can synchronously drive the conveyor belt mechanism 51 to move. Alternatively, the conveyor belt mechanism 51 can adopt an active transmission mechanism driven by a motor, thereby reducing the deformation of the polyester yarn during the pulling transmission process.

[0026] To better achieve negative pressure within the negative pressure hood and reduce water flow into the negative pressure unit, the air extraction port of the negative pressure hood is located above the liquid level line in the tank. More preferably, the negative pressure hood is equipped with an air guide pipe 531 connected to the air extraction port, and the bottom of the air guide pipe 531 has several air inlets or downward-facing air inlets. A drain outlet 532 is located at the bottom of the negative pressure hood, below the liquid level line in the tank. This location not only preserves the seal of the negative pressure hood but also allows accumulated water to be drained into the cleaning tank 5, from where it is discharged through the overflow drain outlet or supplied to the spray pipe 52 by the circulating pump for reuse.

[0027] The cleaning tank 5 is also equipped with a third guide roller 54 and a third extrusion roller group 55 located above the liquid level line in the tank. The third guide roller 54 is located on the side of the discharge end of the conveyor belt mechanism and its height is lower than the output end of the conveyor belt mechanism 51 and the third extrusion roller group 5. The polyester yarn cloth that has been cleaned is squeezed by the third extrusion roller group 55 to reduce the moisture content.

[0028] Drying box 6 is mainly used to dry polyester yarn cloth that has been degreased and cleaned; specifically, a hot air mechanism can be used to dry the polyester yarn cloth that has passed through.

[0029] The ironing mechanism 7 is located adjacent to the drying chamber 6 and is used to iron the polyester yarn fabric that has not yet cooled after drying. Specifically, the ironing mechanism 7 includes a heating roller 71 and two shaping guide rollers 72 that guide the polyester yarn fabric output from the drying chamber to be wrapped around the heating roller 71. While the polyester yarn fabric is being flattened and shaped by the heating roller 71, it can also be further dried.

[0030] Because polyester yarn fabric is prone to displacement and shrinkage deformation when repeatedly conveyed by S-shaped rollers in the soaking and dissolving tank 4 with high-temperature steam, this invention also includes a widening roller, which is arranged between the yarn outlet end of the soaking and dissolving tank 4 and the feed end of the cleaning tank 5. The widening roller is a bidirectional threaded widening roller with a bidirectional spiral spreading pattern on its surface. The widening roller eliminates wrinkles in the wet yarn fabric, prevents fabric shrinkage, and eliminates cleaning dead corners.

[0031] This invention discloses a method for degreasing polyester wire harness tape, implemented using the aforementioned polyester wire harness tape pretreatment equipment, comprising the following steps: Step 1: Equipment preheating and debugging; control the liquid level of the first cleaning solution in the coarse washing tank within the preset range and heat the temperature of the first cleaning solution to 50-60℃; control the liquid level of the degreasing working solution in the soaking and dissolving tank within the preset range and heat the temperature of the degreasing working solution to 80-100℃; adjust the spray pressure of the spray pipes in the cleaning tank and the negative pressure suction of the negative pressure mechanism, and turn on the drying box and ironing mechanism for preheating; Step 2: After the polyester yarn is output by the unwinding roller, it enters the coarse washing tank, is introduced into the first cleaning liquid by the first guide roller, and then squeezed by the first extrusion roller group to remove the floating oil and impurities on the surface of the polyester yarn. Step 3: After coarse washing, the gauze enters the sealed soaking and dissolving tank. It is driven by S-shaped roller group to reciprocate and transport the liquid in a roundabout way. Relying on the high temperature working liquid with gradient concentration, the deep oil stains on the steamed polyester yarn are fully dissolved and removed. Step 4: After the polyester yarn cloth is sent out of the soaking and dissolving tank, it enters the cleaning tank. During the upward conveying process of the conveyor belt mechanism in the cleaning tank, the second cleaning liquid is sprayed onto the polyester yarn cloth by the spray pipe. At the same time, the negative pressure mechanism below adsorbs the liquid. The second cleaning liquid passes through the polyester yarn cloth, carrying away the residual sewage and impurities. After squeezing out the second cleaning liquid from the polyester yarn cloth, it is output to the drying box. Step 5: When the polyester yarn fabric passes through the drying box, it is dried evenly with hot air to remove residual moisture from the polyester yarn fabric. Step 6: After drying, the polyester yarn is guided by shaping guide rollers and wrapped around the surface of the heating roller for pressing and ironing to eliminate wrinkles, making the fabric flat and firm. Finally, it is wound up by the take-up roller.

[0032] After the polyester yarn is soaked and cleaned, it is first stretched to the left and right sides by the spreading roller at the yarn outlet of the soaking and dissolving tank before being put into the cleaning tank.

Claims

1. A pretreatment device for polyester wire harness tape, characterized in that... The equipment includes a coarse washing tank, a soaking and dissolving tank, a washing tank, a drying box, and an ironing mechanism, which are arranged between the unwinding roller and the take-up roller for the polyester yarn to pass through sequentially. The rough washing tank is equipped with a first heating device to heat the first cleaning liquid in the rough washing tank to 50-60°C, a first guide roller located below the liquid level, and a first extrusion roller group located above the liquid level. The soaking and dissolving tank has a sealed structure and is equipped with a second heating device to heat the degreasing working liquid to 80-100℃, as well as an S-shaped roller group to drive the polyester yarn back and forth with the degreasing working liquid. The cleaning tank is equipped with a conveyor belt mechanism, a spray pipe, and a negative pressure mechanism. The conveyor belt mechanism is installed in the cleaning tank with an inclined structure where the feed end is low and the discharge end is high. The belt body of the conveyor belt mechanism is a perforated belt or a mesh belt. The spray pipe is located above the conveyor belt mechanism. The negative pressure mechanism includes a negative pressure hood with a top opening and a negative pressure host connected to the air extraction port of the negative pressure hood. The negative pressure hood is located between two support rollers of the conveyor belt mechanism, and the top opening is in close contact with the inner surface of the belt body of the conveyor belt mechanism. The air extraction port of the negative pressure hood is located above the liquid level line in the tank, and a drain outlet is located at the bottom of the negative pressure hood below the liquid level line in the tank. The drying box uses a hot air mechanism to dry the polyester yarn fabric passing through it; The ironing mechanism includes a heating drum and two shaping guide rollers that guide polyester yarn cloth wrapped around the heating drum, which is output from the drying box.

2. The polyester wire harness tape pretreatment equipment according to claim 1, characterized in that: The rough washing tank is provided with two or more sets of first extrusion rollers, and a tank cavity partition plate is provided below each set of first extrusion rollers in the rough washing tank.

3. The pretreatment equipment for polyester wire harness tape according to claim 1, characterized in that: The soaking and dissolving tank is stacked on top of the coarse washing tank via a frame.

4. The pretreatment equipment for polyester wire harness tape according to claim 3, characterized in that: The soaking and dissolving tank includes multiple layers of soaking and dissolving tanks stacked on top of each other, with the concentration of the degreasing working solution decreasing layer by layer from bottom to top.

5. The pretreatment equipment for polyester wire harness tape according to claim 1, characterized in that: The negative pressure hood is equipped with an air guide pipe that is connected to the air extraction interface, and the bottom of the air guide pipe has several air inlets.

6. The pretreatment equipment for polyester wire harness tape according to claim 1, characterized in that: The cleaning tank is also equipped with a third guide roller and a third extrusion roller group located above the liquid level line in the tank; the third guide roller is located on the discharge end side of the conveyor belt mechanism and its height is lower than the output end of the conveyor belt mechanism and the third extrusion roller group.

7. The pretreatment equipment for polyester wire harness tape according to claim 1, characterized in that: It also includes an expansion roller, which is arranged between the gauze outlet end of the soaking and dissolving tank and the feed end of the washing tank.

8. The pretreatment equipment for polyester wire harness tape according to claim 7, characterized in that: The expanding roller is a bidirectional threaded expanding roller, and the surface of the expanding roller is provided with a bidirectional spiral spreading pattern.

9. A method for removing oil from polyester wire harness tape and gauze, characterized in that... The method is implemented using the polyester wire harness tape pretreatment equipment according to any one of claims 1 to 8, and includes the following steps: Step 1: Equipment preheating and debugging; control the liquid level of the first cleaning solution in the coarse washing tank within the preset range and heat the temperature of the first cleaning solution to 50-60℃; control the liquid level of the degreasing working solution in the soaking and dissolving tank within the preset range and heat the temperature of the degreasing working solution to 80-100℃; adjust the spray pressure of the spray pipes in the cleaning tank and the negative pressure suction of the negative pressure mechanism, and turn on the drying box and ironing mechanism for preheating; Step 2: After the polyester yarn is output by the unwinding roller, it enters the coarse washing tank, is introduced into the first cleaning liquid by the first guide roller, and then squeezed by the first extrusion roller group to remove the floating oil and impurities on the surface of the polyester yarn. Step 3: After coarse washing, the gauze enters the sealed soaking and dissolving tank. It is driven by S-shaped roller group to reciprocate and transport the liquid in a roundabout way. Relying on the high temperature working liquid with gradient concentration, the deep oil stains on the steamed polyester yarn are fully dissolved and removed. Step 4: After the polyester yarn cloth is sent out of the soaking and dissolving tank, it enters the cleaning tank. During the upward conveying process of the conveyor belt mechanism in the cleaning tank, the second cleaning liquid is sprayed onto the polyester yarn cloth by the spray pipe. At the same time, the negative pressure mechanism below adsorbs the liquid. The second cleaning liquid passes through the polyester yarn cloth, carrying away the residual sewage and impurities. After squeezing out the second cleaning liquid from the polyester yarn cloth, it is output to the drying box. Step 5: When the polyester yarn fabric passes through the drying box, it is dried evenly with hot air to remove residual moisture from the polyester yarn fabric. Step 6: After drying, the polyester yarn is guided by shaping guide rollers and wrapped around the surface of the heating roller for pressing and ironing to eliminate wrinkles, making the fabric flat and firm. Finally, it is wound up by the take-up roller.

10. The method for pretreatment and degreasing of polyester wire harness tape gauze according to claim 9, characterized in that: After the polyester yarn is soaked and cleaned, it is first stretched to the left and right sides by the spreading roller at the yarn outlet of the soaking and dissolving tank before being put into the cleaning tank.

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