Light-weight polyester cord fabric for tire and preparation equipment of monofilament raw material of light-weight polyester cord fabric

Abstract

The utility model discloses light-weight polyester cord fabric for a tire and preparation equipment of monofilament raw materials of the light-weight polyester cord fabric. The light-weight polyester cord fabric for the tire comprises a plurality of warp yarns and a plurality of weft yarns, each warp yarn comprises at least one polyester protofilament; the polyester precursor is synthesized by 100-500 monofilaments, and all or part of the monofilaments are in a hollow state; each weft yarn comprises at least one weft yarn unit; the warp yarns and the weft yarns are arranged in a staggered manner to form the polyester cord fabric. According to the light-weight polyester cord fabric for the tire and the preparation equipment of the monofilament raw material of the light-weight polyester cord fabric, the weight of the warp can be reduced on the premise that the diameter of the warp is kept unchanged and the strength change is small, so that the weight of the polyester cord fabric is reduced, and the purpose of light weight is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire cord fabrics, and relates to a polyester cord fabric, in particular to a lightweight polyester cord fabric for tires and a preparation device for its monofilament raw materials. Background Art

[0002] As the country proposes a development strategy of lightweight automobiles, it also requires automobile tires to be lightweight in order to reduce tire rolling resistance, improve fuel efficiency, and reduce automobile exhaust emissions. Polyester cord, as an important skeleton material in the tire manufacturing process, also plays a vital role in tire lightweighting.

[0003] In the process of lightweight tire development and design, high-strength low-denier polyester cord is generally used to replace conventional high-denier polyester cord to meet the strength requirements per unit area in the tire design process. However, this method reduces the cord diameter and cord thickness, so the entire tire needs to be redesigned, and the calendering process in the tire manufacturing process needs to be adjusted. The design process is expensive and cumbersome, so the lightweight process of skeleton materials is still relatively slow.

[0004] In view of this, there is an urgent need to design a new polyester cord for tires to overcome the above-mentioned defects of existing polyester cord for tires. Utility Model Content

[0005] The utility model provides a preparation device for lightweight polyester cord fabric for tires and its monofilament raw materials, which can reduce the weight of the warp yarns while keeping the warp yarn diameter unchanged and the strength change very little (meeting national standards and customer needs), thereby reducing the weight of the polyester cord fabric and achieving the purpose of lightweighting.

[0006] In order to solve the above technical problems, according to one aspect of the utility model, the following technical solution is adopted:

[0007] A lightweight polyester cord for a tire, the lightweight polyester cord for a tire comprising: a plurality of warp yarns and a plurality of weft yarns;

[0008] Each warp yarn includes at least one polyester raw yarn; the polyester raw yarn is synthesized from a plurality of monofilaments, and a set area of ​​all or part of the monofilaments is hollow; each weft yarn includes at least one weft yarn unit; each warp yarn and each weft yarn are interwoven according to a set rule to form a polyester curtain fabric.

[0009] As an implementation mode of the utility model, the hollow area of ​​the monofilament accounts for 10-40% of the entire cross-sectional area of ​​the monofilament, and this ratio is the hollowness of the polyester raw yarn.

[0010] As an implementation mode of the present invention, the single filament fineness of the polyester raw filament is 2 to 6 D / F.

[0011] As an implementation mode of the present utility model, the polyester raw yarn is synthesized from 100 to 500 monofilaments.

[0012] As an implementation mode of the utility model, each warp yarn is obtained by twisting 1 to 3 polyester raw yarns.

[0013] As an implementation mode of the utility model, the weft yarn unit is nylon core-spun yarn or polyester core-spun yarn or cotton yarn or polyester-cotton blended yarn.

[0014] According to another aspect of the utility model, the following technical scheme is adopted: a preparation device for the above-mentioned lightweight polyester cord monofilament raw material for tires, the preparation device comprising: a silo, a conveying device, a metering device, a spinning device, a cooling chamber, a spinning tunnel, a hot drawing and shaping device and a winding device;

[0015] The silo, conveying device, metering device, spinning device, cooling chamber, spinning tunnel, hot drawing and shaping device and winding device are connected in sequence;

[0016] The spinning device comprises a housing, a cover, a positioner, a distribution plate, a filter screen, a porous plate, a flat plate and a spinneret; the positioner, the distribution plate, the filter screen, the porous plate, the flat plate and the spinneret are respectively arranged in the housing, and the cover is arranged at the opening of the housing;

[0017] The spinneret comprises a plate body, and a plurality of spinneret holes are arranged on the plate body. Partitions are arranged in each spinneret hole, so that a single filament in a set area is formed to be hollow.

[0018] As an implementation mode of the present utility model, the partition is circular or Y-shaped.

[0019] As an embodiment of the utility model, the conveying device is connected to the silo and the spinning device respectively through a conveying pipeline, and can convey the raw materials in the silo to the spinning device for spinning; the conveying pipeline is provided with a metering mechanism for measuring the amount of the conveyed raw materials;

[0020] The cooling chamber is arranged close to the spinning device, and the spinning device uses the raw material conveyed by the conveying device to spin a plurality of single filaments in a set area in a hollow state, and the spun single filaments are cooled in the cooling chamber;

[0021] The spinning tunnel is arranged close to the cooling chamber, and the plurality of filament melts cooled in the cooling chamber are solidified through the spinning tunnel;

[0022] The heat-drawing and shaping device is arranged close to the spinning tunnel, and performs heat-drawing and shaping on a plurality of monofilaments solidified through the spinning tunnel;

[0023] The winding device is arranged close to the hot stretching and shaping device, and winds up a plurality of monofilaments that have been hot stretched and shaped by the hot stretching and shaping device.

[0024] As an embodiment of the utility model, the cover is a ring nut, and the ring nut is fixedly arranged at the opening of the shell; the shell and the ring nut constitute the external structure of the spinning device;

[0025] The conveying device and the metering device are realized by a metering pump; the positioner is connected to the metering pump and can fix the position of the metering pump and the spinning device;

[0026] The filter screen is arranged below the distribution plate, the porous plate is arranged below the filter screen, and the flat pad is arranged below the porous plate; the distribution plate is connected to the output end of the metering pump, so that the melt delivered from the metering pump flows evenly to the filter screen and the porous plate; the filter screen filters out impurities and foreign matter from the melt, and the porous plate allows the filtered melt to flow evenly to the flat pad; the flat pad collects the melt and flows evenly to the spinneret; the spinneret transforms the melt into filaments with a set cross-sectional shape.

[0027] The beneficial effect of the utility model is that the preparation equipment of lightweight polyester cord fabric for tires and its monofilament raw materials proposed by the utility model can reduce the weight of the warp yarn while keeping the warp yarn diameter unchanged and the strength change very little (meeting national standards and customer needs), thereby reducing the weight of the polyester cord fabric and achieving the purpose of lightweighting.

[0028] The utility model does not change the diameter and thickness of the cord and does not need to change the tire design and calendering process, thereby reducing the weight of the tire carcass skeleton material and thus reducing the weight of the tire, thereby reducing the tire rolling resistance, improving fuel utilization and reducing production costs.

[0029] In one usage scenario of the utility model, the lightweight polyester cord for the tire of the utility model uses a dipped cord produced from hollow fibers with a hollowness of 10 to 40%. Compared with the dipped cord of the same diameter, its weight can be reduced by 5 to 30%, thereby achieving the purpose of lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a lightweight polyester cord fabric for a tire in one embodiment of the utility model.

[0031] Figure 2 It is a side view of a lightweight polyester cord for a tire in one embodiment of the utility model.

[0032] Figure 3 It is a cross-sectional schematic diagram of a lightweight polyester cord for a tire in one embodiment of the utility model (magnified 200 times).

[0033] Figure 4 It is a cross-sectional schematic diagram of a lightweight polyester cord for a tire in one embodiment of the utility model (magnified 500 times).

[0034] Figure 5 The cross-sectional view of the lightweight polyester tire cord in one embodiment of the present invention and the conventional tire cord is shown in FIG.

[0035] Figure 6 It is a schematic diagram of the composition of a device for preparing lightweight polyester cord monofilament raw materials for tires in one embodiment of the utility model.

[0036] Figure 7 It is a schematic structural diagram of a spinning device in one embodiment of the utility model.

[0037] Figure 8 It is a structural schematic diagram of a spinneret in one embodiment of the utility model. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0039] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0040] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar prior art means and some technical features in the embodiments are mutually replaced and are also within the scope of the present invention.

[0041] The term “connection” in the specification includes both direct connection and indirect connection.

[0042] The utility model discloses a lightweight polyester cord fabric for tires. Figure 1 , Figure 2 This is a schematic diagram of the structure of a lightweight polyester cord fabric for a tire in one embodiment of the utility model; please refer to Figure 1 , Figure 2The lightweight polyester cord fabric for tires includes: a plurality of warp yarns 1 and a plurality of weft yarns 2; each warp yarn 1 includes at least one polyester precursor; in one embodiment, each warp yarn 1 can be obtained by twisting 1 to 3 polyester precursors. The polyester precursor can be synthesized from a plurality of monofilaments, and all or part of the monofilaments are hollow. Each weft yarn 2 includes at least one weft yarn unit; in one embodiment, the weft yarn unit is nylon core-spun yarn or polyester core-spun yarn or cotton yarn or polyester-cotton blended yarn. Each warp yarn 1 and each weft yarn 2 are interwoven according to a set rule to form a polyester cord fabric (e.g., each warp yarn and each weft yarn can be interlaced to form a polyester cord fabric).

[0043] In one embodiment of the utility model, the monofilaments of the synthetic polyester raw yarn are all hollow monofilaments; in another embodiment of the utility model, among the monofilaments of the synthetic polyester raw yarn, some monofilaments are hollow monofilaments and some monofilaments are solid monofilaments; in yet another embodiment of the utility model, the weft yarn unit is a solid structure and can also be a hollow structure.

[0044] In one embodiment of the present invention, the monofilament fineness of the polyester raw yarn is 2 to 6D / F; wherein D is a unit of measurement for fiber thickness, also known as denier, or D for short; and F represents the number of monofilaments in the fiber. The number of monofilaments can be selected accordingly according to product specifications. In another embodiment of the present invention, the polyester raw yarn is synthesized from 100 to 500 monofilaments.

[0045] See also Figures 3 to 5 In one embodiment of the present invention, the hollow area of ​​the monofilament accounts for 10-40% of the entire monofilament cross-sectional area, which is the hollowness of the polyester raw yarn.

[0046] The utility model also discloses a preparation device for the above-mentioned lightweight polyester cord monofilament raw material for tires. Figure 6 This is a schematic diagram of the composition of a lightweight polyester cord monofilament raw material preparation device for tires in one embodiment of the utility model; please refer to Figure 6 The preparation equipment includes: a silo 10, a conveying device 20, a metering mechanism 30, a spinning device 40, a cooling chamber 50, a spinning tunnel 60, a hot stretching and shaping device 70 and a winding device 80. The silo 10, the conveying device 20, the metering mechanism 30, the spinning device 40, the cooling chamber 50, the spinning tunnel 60, the hot stretching and shaping device 70 and the winding device 80 are connected in sequence.

[0047] In one embodiment of the utility model, the conveying device 20 is connected to the silo 10 and the spinning device 40 respectively through a conveying pipeline, and can convey the raw materials in the silo 10 to the spinning device 40 for spinning; the conveying pipeline 20 is provided with a metering mechanism 30 for measuring the amount of conveyed raw materials.

[0048] The cooling chamber 50 is disposed close to the spinning device 40 . The spinning device 40 uses the raw material conveyed by the conveying device 20 to spin a plurality of monofilaments in a hollow state in a set area. The spun monofilaments are cooled in the cooling chamber 50 .

[0049] The spinning shaft 60 is arranged near the cooling chamber 50, and the plurality of monofilament melts cooled in the cooling chamber 50 are solidified through the spinning shaft 60. The hot stretching and shaping device 70 is arranged near the spinning shaft 60, and the plurality of monofilaments solidified through the spinning shaft 60 are subjected to hot stretching and shaping. The winding device 80 is arranged near the hot stretching and shaping device 70, and the plurality of monofilaments hot stretching and shaping through the hot stretching and shaping device 70 are wound.

[0050] Figure 7 This is a schematic diagram of the structure of a spinning device in one embodiment of the utility model; please refer to Figure 7 The spinning device 40 includes a shell 41, a cover 42, a positioner 43, a distribution plate 44, a filter 45, a porous plate 46, a flat plate 47 and a spinneret 48; the positioner 43, the distribution plate 44, the filter 45, the porous plate 46, the flat plate 47 and the spinneret 48 are respectively arranged in the shell 41, and the cover 42 is arranged at the opening of the shell 41.

[0051] In one embodiment of the present invention, the cover 42 is a ring nut, which is fixedly arranged at the opening of the housing 41; the housing 41 and the ring nut constitute the external structure of the spinning device 40. The conveying device 20 and the metering mechanism 30 are implemented by a metering pump; the positioner 43 is connected to the metering pump and can fix the position of the metering pump and the spinning device 40.

[0052] The filter screen 45 is arranged below the distribution plate 44, the porous plate 46 is arranged below the filter screen 45, and the flat pad 47 is arranged below the porous plate 46; the distribution plate 44 is connected to the output end of the metering pump, so that the melt delivered from the metering pump flows evenly to the filter screen 45 and the porous plate 46; the filter screen 45 filters out impurities and foreign matter from the melt, which can improve the uniformity of the melt; the porous plate 46 allows the filtered melt to flow evenly to the flat pad 47; the flat pad 47 collects the melt and then flows evenly to the spinneret 48; the spinneret 48 transforms the melt into filaments with a set cross-sectional shape (such as a circular cross-sectional shape and a special-shaped interface shape).

[0053] Figure 8 This is a schematic diagram of the structure of a spinneret in one embodiment of the utility model; please refer to Figure 8In one embodiment of the present invention, the spinneret 48 comprises a plate body 481, and the plate body 481 is provided with a plurality of spinneret holes 482, each of which is provided with a partition, so as to form a single filament in a set area in a hollow state. In one embodiment of the present invention, the partition is circular or Y-shaped.

[0054]

[0055]

[0056] Table 1 Comparison of lightweight polyester cord fabric for tires of the utility model with existing solutions and national standards

[0057] As can be seen from Table 1, the lightweight polyester cord fabric for tires of the utility model is designed as a hollow structure through the monofilament, and various indicators of the obtained hollow polyester monofilament meet the corresponding national standards.

[0058] To sum up, the lightweight polyester cord fabric for tires and the monofilament raw material preparation equipment proposed in the utility model can reduce the weight of the warp yarn while keeping the warp yarn diameter unchanged and the strength change very little (meeting national standards and requirements), thereby reducing the weight of the polyester cord fabric and achieving the purpose of lightweighting.

[0059] The utility model does not change the diameter and thickness of the cord and does not need to change the tire design and calendering process, thereby reducing the weight of the tire carcass skeleton material and thus reducing the weight of the tire, thereby reducing the tire rolling resistance, improving fuel utilization and reducing production costs.

[0060] In one usage scenario of the utility model, the lightweight polyester cord for the tire of the utility model uses a dipped cord produced from hollow fibers with a hollowness of 10 to 40%. Compared with the dipped cord of the same diameter, its weight can be reduced by 5 to 30%, thereby achieving the purpose of lightweight.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The description and application of the utility model here are illustrative, and it is not intended to limit the scope of the utility model to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be embodied in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. The deformation and changes of the embodiments disclosed here are possible, and the replacement of the embodiments and the various equivalent components are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that the utility model can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential features of the utility model. Other deformations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the utility model.

Claims

1. A lightweight polyester cord for tires, characterized in that: The lightweight polyester cord fabric for tires comprises: a plurality of warp yarns and a plurality of weft yarns; Each warp yarn includes at least one polyester raw yarn; the polyester raw yarn is synthesized from a plurality of monofilaments, and a set area of ​​all or part of the monofilaments is hollow; each weft yarn includes at least one weft yarn unit; each warp yarn and each weft yarn are interwoven according to a set rule to form a polyester curtain fabric.

2. The lightweight polyester cord for tire according to claim 1, characterized in that: The hollow area of ​​the monofilament accounts for 10-40% of the entire monofilament cross-sectional area, and this proportion is the hollowness of the polyester raw yarn.

3. The lightweight polyester cord for tire according to claim 1, characterized in that: The monofilament fineness of the polyester raw yarn is 2-6D / F.

4. The lightweight polyester cord for tire according to claim 1, characterized in that: The polyester raw yarn is synthesized from 100 to 500 single yarns.

5. The lightweight polyester cord for tire according to claim 1, characterized in that: Each warp yarn is obtained by twisting 1 to 3 polyester raw fibers.

6. The lightweight polyester cord for tire according to claim 1, characterized in that: The weft yarn unit is nylon core-spun yarn or polyester core-spun yarn or cotton yarn or polyester-cotton blended yarn.

7. A device for preparing lightweight polyester cord monofilament raw materials for tires according to any one of claims 1 to 6, characterized in that: The preparation equipment includes: a silo, a conveying device, a metering mechanism, a spinning device, a cooling chamber, a spinning tunnel, a hot drawing and shaping device and a winding device; The silo, conveying device, metering mechanism, spinning device, cooling chamber, spinning tunnel, hot drawing and shaping device and winding device are connected in sequence; The spinning device comprises a housing, a cover, a positioner, a distribution plate, a filter screen, a porous plate, a flat plate and a spinneret; the positioner, the distribution plate, the filter screen, the porous plate, the flat plate and the spinneret are respectively arranged in the housing, and the cover is arranged at the opening of the housing; The spinneret comprises a plate body, and a plurality of spinneret holes are arranged on the plate body. Partitions are arranged in each spinneret hole, so that a single filament in a set area is formed to be hollow.

8. The monofilament raw material preparation device according to claim 7, characterized in that: The partition is circular or Y-shaped.

9. The monofilament raw material preparation device according to claim 7, characterized in that: The conveying device is connected to the silo and the spinning device respectively through a conveying pipeline, and can convey the raw materials in the silo to the spinning device for spinning; the conveying pipeline is provided with a metering mechanism for measuring the amount of conveyed raw materials; The cooling chamber is arranged close to the spinning device, and the spinning device uses the raw material conveyed by the conveying device to spin a plurality of single filaments in a set area in a hollow state, and the spun single filaments are cooled in the cooling chamber; The spinning tunnel is arranged close to the cooling chamber, and the plurality of filament melts cooled in the cooling chamber are solidified through the spinning tunnel; The heat-drawing and shaping device is arranged close to the spinning tunnel, and performs heat-drawing and shaping on a plurality of monofilaments solidified through the spinning tunnel; The winding device is arranged close to the hot stretching and shaping device, and winds up a plurality of monofilaments that have been hot stretched and shaped by the hot stretching and shaping device.

10. The monofilament raw material preparation device according to claim 7, characterized in that: The cover is a ring nut, and the ring nut is fixedly arranged at the opening of the shell; the shell and the ring nut constitute the external structure of the spinning device; The conveying device and the metering mechanism are realized by a metering pump; the positioner is connected to the metering pump and can fix the position of the metering pump and the spinning device; The filter screen is arranged below the distribution plate, the porous plate is arranged below the filter screen, and the flat pad is arranged below the porous plate; the distribution plate is connected to the output end of the metering pump, so that the melt delivered from the metering pump flows evenly to the filter screen and the porous plate; the filter screen filters out impurities and foreign matter from the melt, and the porous plate allows the filtered melt to flow evenly to the flat pad; the flat pad collects the melt and flows evenly to the spinneret; the spinneret transforms the melt into filaments with a set cross-sectional shape.

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