Fiber winding forming equipment and reinforced fiber composite barrel forming equipment

Abstract

The utility model aims to overcome the defects that in storage tank winding forming equipment and a forming method in the prior art, due to the fact that materials are poor in rigidity and pressure bearing capacity, the storage tank is prone to deformation in the forming process, and the rigidity and strength of products need to be increased by increasing the thickness. The fiber winding forming equipment comprises a roller carrier, a cylindrical mold, a first material conveying device and a translation crane, the cylindrical mold is in friction rolling connection with the roller carrier, the first material conveying device is located on the translation crane, the translation crane reciprocates along the axis of the mold, and the first material conveying device is located on the roller carrier. According to the fiber winding forming equipment and the reinforced fiber composite barrel forming equipment, fibers with different winding depths and fibers with different tensions are obtained, compared with a structure in which a fiber reinforced layer is separated from a base material layer, the pressure bearing capacity of the fiber winding forming equipment and the reinforced fiber composite barrel forming equipment can be improved by 17-20%, and the service life of the fiber winding forming equipment and the reinforced fiber composite barrel forming equipment is prolonged. And an unexpected technical effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinder forming equipment, and particularly relates to a fiber winding forming equipment and a reinforced fiber composite cylinder forming equipment. Background Art

[0002] At present, the PP storage tank winding forming equipment introduced from Europe in China mostly uses PP or PPH particles as raw materials. After hot melting and extrusion, they are wound onto a mold. After forming, the two ends are welded with end caps and can be used for various storage tanks or reaction vessels. Using this kind of equipment and method for forming equipment has a higher production efficiency than the FRP winding production line, and has many environmental protection and green production advantages such as no hazardous waste generated during the production process, and the waste materials can be recycled and reused. In recent years, it has gradually replaced FRP storage tank products in the fields of chemical industry, medicine, environmental protection, etc. in China. However, it also has certain defects. The PP or PPH material has poor stiffness and poor pressure-bearing capacity. Most of them rely on increasing the thickness to improve its stiffness and strength. At the same time, it is easy to deform during the forming process, resulting in difficult subsequent processing. To a certain extent, it restricts the further popularization and application of this production process. Content of the Utility Model

[0003] The purpose of the utility model is to provide a fiber winding forming equipment and a reinforced fiber composite cylinder forming equipment for the deficiencies existing in the prior art of storage tank winding forming equipment and forming methods, such as poor material stiffness, poor pressure-bearing capacity, easy deformation during the forming process, and the need to increase the thickness to increase the stiffness and strength of the product.

[0004] The technical solution for the utility model to solve the technical problems is as follows:

[0005] A reinforced fiber composite cylinder forming equipment, including a roller rack, a cylindrical mold, a first feeding device, and a translation crane. The cylindrical mold is frictionally and rotatably connected to the roller rack. The first feeding device is located on the translation crane. The translation crane reciprocates along the axis of the mold. While the roller rack rotates, the translation crane moves. The first feeding device outputs the melted and extruded cylinder forming material onto the cylindrical mold. It is characterized in that: it further includes a second feeding device. The second feeding device is arranged on the translation crane. The translation crane carries the first feeding device and the second feeding device to move. The second feeding device outputs a strip-shaped reinforced fiber material. The first feeding device outputs the material onto the mold prior to the second feeding device. The material output by the second feeding device is wound around the material output by the first feeding device with a certain tension and sinks into the material output by the first feeding device;

[0006] The second feeding device described above includes a disk feeder and a tensioning wheel. A strip-shaped reinforcing fiber material is stored on the disk feeder. The tensioning wheel is movably arranged between the mold and the disk feeder. The strip-shaped reinforcing fiber material is output onto the mold after passing around the tensioning wheel, and the tensioning wheel provides extrusion pressure to the strip-shaped reinforcing fiber material.

[0007] It further includes a tensioning wheel pushing device. The tensioning wheel pushing device includes a push rod and a linear reciprocating drive mechanism. One end of the push rod is connected to the output end of the linear reciprocating drive mechanism, and the other end is connected to the tensioning wheel. The linear reciprocating drive mechanism drives the push rod to extend and retract, thereby applying different extrusion pressures to the reinforcing fiber material.

[0008] A stress sensor is provided at the end of the push rod connected to the tensioning wheel. The stress sensor detects the tension of the reinforcing fiber material; and / or the tensioning wheel pushing device is an electro-hydraulic push rod, a cylinder, or an electric cylinder; and / or a flattening guide is provided or further included. The flattening guide includes a through hole, and the through hole is a rectangular hole, the height and width of which are adapted to the thickness of the strip-shaped reinforcing fiber. The strip-shaped reinforcing fiber passes through the through hole flatly.

[0009] The stress sensor is electrically connected to the input end of the control system, and the linear reciprocating drive mechanism of the tensioning wheel pushing device is electrically connected to the output end of the control system. The control system adjusts the reciprocating movement of the linear reciprocating drive mechanism according to the stress detected by the stress sensor to adjust the extension amount of the push rod, so as to adjust the extrusion pressure of the tensioning wheel on the reinforcing fiber material.

[0010] The cylindrical forming material output by the first feeding device is melted and extruded PP or PPH or PTFE, and / or the strip-shaped reinforcing fiber material output by the second feeding device is a high specific strength material; or the strip-shaped reinforcing fiber material output by the second feeding device is glass fiber, carbon fiber, or PPTA fiber.

[0011] A fiber winding forming device includes a disk feeder, a tensioning wheel, and a tensioning wheel pushing device. The disk of the disk feeder is rotatably arranged on the frame. The tensioning wheel is movably arranged between the mold for winding fibers and the disk feeder. The axle of the tensioning wheel is arranged parallel to the disk axle. The output end of the tensioning wheel pushing device is opposite to or connected to the axle of the tensioning wheel. The tensioning wheel pushing device pushes the axle of the tensioning wheel to move, thereby changing the tension of the reinforcing fiber material.

[0012] The tensioning wheel pushing device described above includes a linear reciprocating drive device and a push rod. One end of the push rod is connected to the output end of the linear reciprocating drive device, and the other end is connected to the tensioning wheel axle. The linear reciprocating drive mechanism drives the push rod to extend and retract, thereby applying different extrusion pressures to the reinforcing fiber material; or the tensioning wheel pushing device is an electric push rod, a pneumatic push rod, or an electro-hydraulic push rod, a cylinder, or an electric cylinder.

[0013] A stress sensor is provided at one end of the push rod connected to the tensioning wheel, and the stress sensor detects the tension of the reinforcing fiber material; and / or a flattening guide is provided or further included. The flattening guide includes a through hole, which is a rectangular hole, and the height and width of the hole are adapted to the thickness of the strip-shaped reinforcing fiber. The strip-shaped reinforcing fiber passes through the through hole flatly;

[0014] The stress sensor is electrically connected to the input end of the control system, and the linear reciprocating drive mechanism of the tensioning wheel pushing device is electrically connected to the output end of the control system. The control system adjusts the reciprocating movement of the linear reciprocating drive mechanism according to the stress detected by the stress sensor to adjust the extension amount of the push rod, so as to adjust the extrusion force of the tensioning wheel on the reinforcing fiber material.

[0015] The advantages and beneficial effects of the present utility model are as follows:

[0016] The fiber winding forming equipment adopting the structure of the present utility model can wind the fiber on the surface of the mold under the drive of the translation traveling crane. By pushing the tensioning wheel to move through the tensioning wheel pushing device, the tension of the fiber wound on the surface of the mold can be adjusted, so as to obtain fibers with different winding depths and different tensions.

[0017] By using the reinforcing fiber composite cylinder forming equipment of the present utility model, the forming material as the base material is output by the first feeding device, and the reinforcing fiber material as the reinforcing material is output by the second feeding device. And a tension is provided for the reinforcing fiber material through the tensioning wheel so that the reinforcing fiber material has a certain tension when wound on the cylindrical mold, enabling the reinforcing fiber material to sink into the base material. Therefore, the cylinder manufactured by this equipment has two different types of materials. One is the base material of the cylinder, providing the basic framework, and the other is the fiber material with a reinforcing effect, which is distributed in the forming material to improve the stiffness of the entire cylinder. Greatly improves the load-bearing capacity of the cylinder. Compared with the cylinder without a fiber reinforcement layer, its pressure-bearing capacity can be increased by 20 - 30%. Compared with the structure where the fiber reinforcement layer and the base material layer are separated, its pressure-bearing capacity can be increased by 17 - 20%, achieving unexpected technical effects. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an embodiment of the reinforcing fiber composite cylinder forming equipment of the present utility model;

[0019] Figure 2 is Figure 1 a top view schematic diagram of;

[0020] Figure 3 is a schematic structural diagram of an embodiment of the second feeding device of the present utility model;

[0021] Figure 4Schematic structural diagram of the cross-section of the reinforced fiber composite cylinder obtained by the forming method of the present utility model.

[0022] Description of the reference numerals in the drawings

[0023] Roller stand, 101 - Frame body, 102 - Roller, 200 - Mold, 300 - Translational traveling crane, 400 - First feeding device, 500 - Second feeding device, 501 - Disc feeder, 502 - Flattening guide, 503 - Tensioning wheel, 504 - Tensioning wheel pushing device, 505 - Stress sensor, 506 - Belt / rope-shaped fiber.

[0024] 601 - Base material layer, 602 - Fiber reinforced layer; 603 - Protective layer. Specific implementation manners

[0025] The present utility model will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not restrictive, and the protection scope of the present utility model cannot be limited thereby.

[0026] As Figures 1 - 3As shown in the figure, the present utility model provides a forming device and a forming method for a reinforced fiber composite cylinder. The forming device of the embodiment of the present utility model includes a roller rack 100 that can rotate forward and backward autonomously, a cylindrical mold 200 driven by the roller rack on the roller rack 100, and a mobile crane 300. The roller rack is commonly known as a tire, and includes a frame body 101, two rollers 102 and a driving device. The rollers are rotatably arranged on the frame body. The two rollers are arranged oppositely, and the roller shafts of the two rollers are parallel. The cylindrical mold is located between the two rollers and is supported by the two rollers, and is frictionally and rotatably connected to the two rollers. The driving device drives the two rollers to rotate one forward and one backward, so as to drive the cylindrical mold to rotate. The mobile crane is arranged on the ground or on the track and travels back and forth along the roller rack, and its traveling direction is parallel to the extension line direction of the roller shaft. A first feeding device 400 and a second feeding device 500 are arranged on the mobile crane. The first feeding device and the second feeding device respectively output materials to the mold for forming on the mold. The material output by the first feeding device 400 is a formed material formed by melting and extrusion, such as polypropylene PP, high-performance polypropylene PPH or polytetrafluoroethylene PTFE, which constitutes the base material layer 601. The material output by the second feeding device is a reinforced fiber material, and its material is a reinforced fiber material with high specific strength, such as glass fiber, carbon fiber, PPTA fiber, etc., which constitutes the fiber reinforced layer 602. It can be a strip-shaped reinforced fiber material or a yarn fiber. When using a strip-shaped or strip-shaped fiber material, its width is generally 50-200mm and its thickness is 0.1-1mm. It is preferably to use cord fabric as the reinforced fiber material. Cord fabric is a tire skeleton fabric woven with strong ply yarns as the warp and medium and fine count single yarns as the weft, and it is easily available in the market. The material output by the first feeding device is a molten or semi-molten formed material, which forms the main part of the formed cylinder. The material output by the second feeding device is a reinforced fiber material, which mainly improves the stiffness and strength of the cylinder. The formed material output by the first feeding device and the reinforced material output by the second feeding device are both wound on the surface of the mold. While the roller rack 100 rotates, the mobile crane 300 simultaneously moves along the roller rack from one side of the roller rack to the other side, so as to evenly wind the materials output by the first feeding device and the second feeding device from one side of the mold to the other side of the mold, so that the materials cover the surface of the mold. The first feeding device 400 winds first, that is, the material output by the first feeding device winds on the surface of the mold first. The material output by the second feeding device winds after the material output by the first feeding device. When the second feeding device 500 winds, a preset tension force needs to be set, so that the reinforced fiber material output by the second feeding device sinks or embeds into the soft formed material output by the first feeding device, so that the materials output by the first feeding device 400 and the second feeding device 500 are tightly fused together. That is to say, the molten PP or PPH material output by the first feeding device contains reinforced fibers.It is best to wind the material of the second feeding device 500 when the output material temperature of the first feeding device 400 is within the range of 80 - 200 °C. At this temperature, the PP or PPH material is in a semi - molten state at a relatively high temperature. The formed material output by the first feeding device has a certain supporting force and a certain inclusiveness in this state. The reinforcing fiber material can be supported by the formed material and can also be pressed into the formed material, so that the reinforcing fiber material and the formed material are combined relatively tightly. After forming, the two form a whole and will not separate from each other.

[0027] Preferably, the second feeding device 500 adopts the following structure, including a disk feeder 501, a tensioning wheel 503, and a tensioning wheel pushing device. The reinforcing fiber material is wound around the disk of the disk feeder. The reinforcing fiber material is usually a tape. The disk of the disk feeder is rotatably arranged on the frame. The tensioning wheel pushing device is connected to the axle of the tensioning wheel. The tensioning wheel is located between the disk of the disk feeder and the mold. The head end of the reinforcing fiber material is led out from the disk and wound around one end of the mold. The tensioning wheel is located between the mold and the disk feeder to tension the reinforcing fiber material. The axle of the tensioning wheel is parallel to the disk axle. The tensioning wheel pushing device pushes the axle of the tensioning wheel to move, thereby changing the position of the tensioning wheel and thus changing the tension of the reinforcing fiber material. The tensioning wheel pushing device 504 includes a linear reciprocating driving device and a push rod. One end of the push rod is connected to the output end of the linear reciprocating driving device, and the other end is connected to the tensioning wheel axle. It is preferably an electric push rod, a pneumatic push rod or an electro - hydraulic push rod. It is best to set a stress sensor 505 to detect the stress of the reinforcing fiber material. According to the stress of the reinforcing fiber material detected by the stress sensor, the position of the tensioning wheel is adjusted through the tensioning wheel pushing device to adjust the tension of the reinforcing fiber material so that it reaches a predetermined tension. When the reinforcing fiber material is a strip or a fiber cloth in strip shape, it is best to set a flattening guide. The flattening guide is provided with a through - hole, and the through - hole is a rectangular hole. Its width is slightly larger than the width of the reinforcing fiber, and its height is slightly larger than the thickness of the reinforcing fiber. The reinforcing fiber material passes flatly through the through - hole of the flattening guide. The coiled strip - shaped raw material is placed in the disk of the disk feeder 501, passes through the flattening guide 502, and is wound around the material wound by the first feeding device 400 on the mold under the extrusion of the tensioning wheel 503, and the reinforcing fiber material sinks into the formed material output by the first feeding device. Preferably, a stress sensor 505 is provided at the end of the push rod connected to the tensioning wheel. The tension of the fiber material is detected by the stress sensor 505. According to the detected tension of the reinforcing fiber material and the preset tension, the extension amount of the push rod is adjusted, so that the tension of the reinforcing fiber is consistent with the preset tension, and the reinforcing fiber can enter the formed material to a preset depth.

[0028] In the present utility model, the material output by the first feeding device is usually molten or semi-molten PP or PPH material, and the material output by the second feeding device is strip-shaped material with a width of 50 - 200 mm and a single-layer thickness of 0.1 - 1 mm. The material is high specific strength materials such as glass fiber, carbon fiber, and PPTA fiber. The single-layer winding thickness of the forming material is 8 - 16 mm.

[0029] In the present utility model, multiple feeding devices can also be provided to obtain multiple PP or PPH substrate layers containing reinforcing fiber materials. For example, a third feeding device and a fourth feeding device are provided. The third feeding device outputs molten or semi-molten PP or PPH forming material, and the fourth feeding device outputs reinforcing fiber material, so as to obtain two substrate layers containing reinforcing fiber materials. Each additional feeding device outputting forming material is called adding a layer of forming material, and each additional output device outputting fiber reinforcing material is called adding a layer of fiber reinforcing material, that is, adding a layer of fiber reinforcing layer.

[0030] Preferably, winding is carried out when the temperature of the material wound by the first feeding device is in the range of 80 - 250 °C, and the prestress of the reinforcing fiber material is 1 - 100 N / mm 2 , and the second layer of material is wound and tightly integrated with the first layer of material. Since the output temperature of the forming material is increased, before the forming material hardens, the warp and weft lines of the reinforcing fiber material can be wound into the forming material constituting the substrate layer and coupled into the forming material, so that the substrate layer and the reinforcing fiber layer become an integral body. Since it is wound on the surface of a cylindrical mold, a cylinder is obtained, and this cylinder can be used as a storage tank or an anti-corrosion device. In the present utility model, prestress is preset, which reduces the stress deformation after the cylinder is formed and improves the accuracy and stability of subsequent processing.

[0031] Preferably, a protective layer feeding device is provided to output forming material as the protective layer 603 to fill the indentations pressed out on the surface of the forming material due to the pressing in of the reinforcing fiber material, thereby increasing the surface smoothness of the prepared cylinder and the bonding strength between the forming material and the reinforcing fiber material.

[0032] Such as Figure 4As shown, the cylinder produced by the method and equipment of the present utility model is called a fiber-reinforced composite cylinder, which includes a base material layer formed by a molding material and a fiber-reinforced layer formed by a reinforcing fiber material. The fiber-reinforced layer is contained within the base material, such that the fiber-reinforced layer is distributed within the base material layer. Since the fiber-reinforced layer is wound around the still-molten plastic base material in circles and moves linearly while winding, the fiber-reinforced layer and the base material layer are mutually fused, and there is no completely clear demarcation line. When the fiber-reinforced layer uses a mesh strip, the molten or semi-molten base material penetrates through the mesh holes or grids of the fiber strip, and since the winding of the fiber enters from the outside of the molten or semi-molten base material into the base material, the inner and outer layers of the base material will not be completely separated, and the two are interconnected, and after molding, indentations will be formed in one or more circles on the surface of the cylinder. Preferably, a layer of molding material is further provided outside the outer base material as a protective layer to cover the outer base material and the reinforcing fiber material. In this way, it provides better protection for the fiber layer, increases the corrosion resistance of the cylinder, and improves the bonding firmness between the two. The cylinder of the present utility model can have multiple base material layers and multiple fiber-reinforced layers according to the number of winding passes of the winding molding material and the number of passes of the reinforcing fiber material during winding, and the fiber-reinforced layers are separated from each other.

[0033] The first feeding device of the present utility model is a prior art, which usually has a hopper for containing molding material particles. The molding material particles are heated to a semi-fluid state, and the semi-fluid molding material is extruded and wound on a mold for molding. Since it is a prior art, it will not be described in detail.

[0034] Taking PP material as the base layer and cord fabric as the fiber-reinforcing material, taking the cylinder diameter of 2500 mm as an example, a comparative experiment is conducted, and the experimental results are as follows. Example

[0035] Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Diameter (inner diameter) mm 2500 2500 2500 2500 2500 2500 2500 2500 2500 Substrate layer thickness mm 8 10 12 14 8 10 12 12 14 Cord fabric thickness mm 0.1 0.3 0.5 0.8 None None None 0.5 0.8 Cord layer width mm 50 80 120 150 None None None 120 (layered) 150 (layered) Compressive strength MPa 26 27 27 30 20 22 23 23 25

[0036] Note: In Comparative Example 4 and Comparative Example 5, the cord fabric layer covers the outer surface of the base material layer and does not enter the base material layer, and the fiber-reinforced layer and the base material layer are arranged in layers.

Claims

1. A reinforced fiber composite cylinder forming device, comprising a roller frame, a cylindrical mold, a first feeding device, and a translation carriage, wherein the cylindrical mold and the roller frame are frictionally connected to each other, the first feeding device is located on the translation carriage, the translation carriage reciprocates along the axis of the mold, the roller frame rotates while the translation carriage moves, and the first feeding device outputs the melted extruded cylinder forming material to the cylindrical mold, characterized in that: The second feeding device is also included, and the second feeding device is arranged on a translating carriage, and the translating carriage carries the first feeding device and the second feeding device to move, and the second feeding device outputs a strip-shaped reinforced fiber material, and the first feeding device outputs the material to the mold before the second feeding device, and the material output by the second feeding device is wound around the material output by the first feeding device with a certain tension force and sinks into the material output by the first feeding device, and the second feeding device includes a disc feeder and a tensioning wheel, and the strip-shaped reinforced fiber material is stored on the disc feeder, and the tensioning wheel is movably arranged between the mold and the disc feeder, and the strip-shaped reinforced fiber material is output to the mold after bypassing the tensioning wheel, and the tensioning wheel provides extrusion force to the strip-shaped reinforced fiber material.

2. The reinforced fiber composite cylinder forming equipment according to claim 1, characterized in that: It also includes a tensioning wheel pushing device, which includes a push rod and a linear reciprocating drive mechanism. One end of the push rod is connected to the output end of the linear reciprocating drive mechanism, and the other end is connected to the tensioning wheel. The linear reciprocating drive mechanism drives the push rod to extend and retract, thereby applying different extrusion pressures to the reinforced fiber material.

3. The reinforced fiber composite cylinder forming equipment according to claim 2, characterized in that: A stress sensor is arranged at one end of the push rod connected to the tensioning wheel, and the stress sensor detects the tensioning force of the reinforced fiber material; and / or the tensioning wheel pushing device is an electro-hydraulic push rod, a cylinder, or an electric cylinder; and / or a flattening guide is arranged or also includes, and the flattening guide includes a through hole, which is a rectangular hole, and the height and width of the hole are adapted to the thickness of the strip-shaped reinforcement fiber, and the strip-shaped reinforcement fiber passes flatly through the through hole.

4. The reinforced fiber composite cylinder forming equipment according to claim 3, characterized in that: The stress sensor is connected to the input end of the control system via an electrical signal, and the linear reciprocating drive mechanism of the tensioning wheel pushing device is connected to the output end of the control system via an electrical signal. The control system adjusts the reciprocating motion of the linear reciprocating drive mechanism according to the stress detected by the stress sensor to adjust the extension amount of the push rod so as to adjust the squeezing force of the tensioning wheel on the reinforced fiber material.

5. The reinforced fiber composite cylinder forming equipment according to claim 1, characterized in that: The barrel molding material output by the first feeding device is melt-extruded PP or PPH or PTFE, and / or the strip-shaped reinforced fiber material output by the second feeding device is a high specific strength material; or the strip-shaped reinforced fiber material output by the second feeding device is glass fiber, carbon fiber, PPTA fiber.

6. A filament winding device, characterized in that: It includes a disc feeder, a tensioning wheel, and a tensioning wheel pushing device. The disc of the disc feeder is rotatably arranged on a frame, the tensioning wheel is movably arranged between a fiber winding mold and the disc feeder, the axle of the tensioning wheel is arranged parallel to the disc axle, the output end of the tensioning wheel pushing device is opposite to or connected to the axle of the tensioning wheel, and the tensioning wheel pushing device pushes the axle of the tensioning wheel to move, thereby changing the tensioning force of the reinforced fiber material.

7. A filament winding device as claimed in claim 6, characterized in that: The tensioning wheel pushing device includes a linear reciprocating drive device and a push rod, one end of the push rod is connected to the output end of the linear reciprocating drive device, and the other end is connected to the tensioning wheel shaft. The linear reciprocating drive mechanism drives the push rod to extend and retract, thereby applying different extrusion pressures to the reinforced fiber material; or the tensioning wheel pushing device is an electric push rod, a pneumatic push rod or an electro-hydraulic push rod, a cylinder or an electric cylinder.

8. A filament winding device as claimed in claim 7, characterized in that: A stress sensor is arranged at one end of the push rod connected to the tensioning wheel, and the stress sensor detects the tensioning force of the reinforced fiber material.

9. A filament winding device as claimed in claim 8, characterized in that: The stress sensor is connected to the input end of the control system via an electrical signal, and the linear reciprocating drive mechanism of the tensioning wheel pushing device is connected to the output end of the control system via an electrical signal. The control system adjusts the reciprocating motion of the linear reciprocating drive mechanism according to the stress detected by the stress sensor to adjust the extension amount of the push rod so as to adjust the squeezing force of the tensioning wheel on the reinforced fiber material.

10. The filament winding device according to claim 7, characterized in that: It also includes a flattening guide, which includes a through hole. The through hole is a rectangular hole, the height and width of which are adapted to the thickness of the strip-shaped reinforcing fiber, and the strip-shaped reinforcing fiber passes through the through hole in a flat manner.

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