Double-effect temperature control cooling and shaping device for composite material pultrusion profile

Abstract

The utility model provides a kind of composite material pultrusion profile double-effect temperature control cooling setting device, it is related to composite material pultrusion forming technical field.Device includes cooling mould, cooling mould is provided with through cooling channel, the cross-sectional shape of cooling channel is consistent with profile cross section outer contour, and it is straight transition at the groove position of profile cross section outer contour;Water cooling pipeline is provided in cooling mould;The side wall of cooling channel is recessed in the section perpendicular to the direction of profile conveying to the direction away from profile, becomes the recess of set width and depth, recess is provided with air cooling opening, air cooling opening is connected with cooling air duct.Cooling mould is internally provided with water cooling pipeline, annular groove for outputting cooling air is provided on cooling channel, realize air cooling+water cooling double-effect double-section cooling.

Description

Technical Field

[0001] This utility model relates to the field of composite material pultrusion technology, and in particular to a dual-effect temperature-controlled cooling and shaping device for composite material pultruded profiles. Background Technology

[0002] Pultrusion is a process for producing composite profiles by impregnating continuous fibers with resin using a traction device and then curing them in a mold under heat. The core process includes three steps: fiber impregnation, mold forming, and curing / cooling. It can produce profiles with complex cross-sections and is suitable for combinations of various reinforcing materials such as glass fiber and carbon fiber with resins such as polyester, epoxy, and polyurethane. The curing / cooling process occurs between the mold forming device and the traction device and can be implemented using various methods such as air cooling or water cooling.

[0003] One direction for improving pultrusion technology is increasing pultrusion speed. Since the profiles need to be cooled to below 60°C when entering the traction machine, increasing pultrusion speed also requires improved curing and cooling efficiency. At lower pultrusion speeds, air cooling during the transport of the pultruded profile between the die forming device and the traction equipment is sufficient for curing and cooling. However, the distance between the die forming device and the traction equipment cannot be arbitrarily increased. When the pultrusion speed increases to approximately 1.2 m / min, cooling devices such as air-cooled boxes and water-cooled boxes are required. Currently, the pultrusion speed of pultruded profiles has exceeded 2.0 m / min and is still gradually increasing; both air-cooled and water-cooled devices are showing certain shortcomings.

[0004] The cooling effect of air-cooled devices is greatly affected by the workshop environment, especially when the ambient temperature is high, the cooling effect is poor. Water-cooled devices are equipped with water baths. After the profiles enter the water baths, they are cooled by heat exchange in the cooling water. After removing the residual water on the surface, they enter the traction device. If the residual water is not completely removed, the profiles are prone to slipping in the traction device, affecting the traction effect. Because moisture can easily remain in the recessed areas of the profiles, it is particularly unsuitable for cooling profiles with high pultrusion speeds and grooved surfaces. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a dual-effect temperature control cooling and shaping device for composite pultruded profiles (hereinafter referred to as "profiles"), including a water-cooled mold through which the profile passes, cooling by heat exchange between the water-cooled mold and the profile surface, and the profile channel being connected to a cooling air duct, so that the profile grooves that are far from the surface of the water-cooled mold are cooled by air cooling, thus achieving dual-effect cooling.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: This utility model provides a dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles, including a cooling mold. The cooling mold is provided with a through cooling channel. The cross-sectional shape of the cooling channel is consistent with the outer contour of the profile cross-section, and it transitions smoothly at the groove position of the outer contour of the profile cross-section. The cooling mold is provided with water-cooling pipes. The sidewall of the cooling channel is recessed in the direction away from the profile on the cross-section perpendicular to the profile conveying direction, forming a groove with a set width and depth. The groove has an air-cooling opening, which is connected to a cooling air duct.

[0007] Optionally, the cross-sectional shape of the cooling channel is separated from the outer contour of the profile cross-section by a set gap, and the gap gradually decreases in the profile conveying direction.

[0008] Optionally, the cooling mold is mounted on a base with a self-lubricating device and can swing on a horizontal plane parallel to the profile conveying direction.

[0009] Optionally, the cooling mold includes an upper mold and a lower mold, wherein the upper mold is connected to a hoisting and lifting device.

[0010] Optionally, there may be multiple grooves with air-cooling openings, and the cooling air ducts may be set in the cooling mold and connected to an external air source.

[0011] Optionally, the cooling duct is connected to a compressed air pipeline.

[0012] Optionally, the water-cooling pipeline is connected to the water-cooling equipment.

[0013] Optionally, a control valve is installed on the connection pipe between the water cooling pipe inside the cooling mold and the water cooling equipment.

[0014] Optionally, temperature control probes are installed at the inlet and outlet of the cooling channel, and a temperature control probe is installed at a set position between the inlet and outlet; the temperature control probes are connected to the automatic control box, and the automatic control box is connected to the water cooling equipment and the control valve.

[0015] Optionally, the profile dual-effect temperature control cooling and shaping device includes multiple cooling molds, which are linearly distributed in the profile conveying direction.

[0016] The beneficial effects of this utility model are as follows: 1. The cooling mold of this utility model is equipped with water-cooling pipes inside, and the cooling channel has annular grooves for outputting cooling air, realizing dual-effect, dual-stage cooling of air and water. Annular air ducts similar to the cross-section of the profile are set inside the mold, and compressed air blows from the center to both sides, enhancing the cooling of the grooved areas that are not in contact with the inner wall of the mold. Due to the profile's own weight and curvature, the profile can contact the water-cooled inner wall of the mold inside, achieving profile cooling. During the cooling process, there is no direct contact with the cooling water, avoiding the problem of cooling water residue in the grooves.

[0017] 2. The cooling mold provided by this utility model is set on a self-lubricating base and connected to a hoisting device above. When the profile is slightly deformed due to internal stress generated during the cooling process, the cooling mold can swing within a certain range to release the internal stress. It can also strictly control the gap between the cooling channel and the outer contour of the profile, thus constraining the profile cross-section. Therefore, it can optimize the appearance quality of the profile during the cooling and curing process from both the overall straightness and cross-sectional dimensions.

[0018] 3. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles provided by this utility model can achieve good cooling and shaping effects for profiles at pultrusion speeds up to 2.0 m / min, with the cooling temperature of the profiles below 50 degrees Celsius. When the pultrusion speed exceeds 2.0 m / min, a series device can be used to achieve product cooling and shaping. Because the pultruded profile passes through the limited space inside the cooling and shaping mold, the profile cools from a high temperature to a low temperature during passage, achieving complete product solidification. Due to the constraint of the limited space, the straightness of the product is fixed, improving the pass rate in terms of product straightness. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0020] Figure 1 This is a schematic diagram of the prior art in a specific implementation.

[0021] Figure 2 This is a cross-sectional schematic diagram of the cooling mold in a specific embodiment.

[0022] Figure 3 This is a schematic diagram of the installation of the cooling mold in a specific embodiment.

[0023] Figure 4 This is a schematic diagram of the air-cooling opening and groove in the cooling mold in a specific embodiment.

[0024] Figure 5 This is a schematic diagram showing the distribution of multiple cooling molds in a specific implementation.

[0025] Among them, 1. Pultrusion die; 2. Traction machine; 3. Air-cooled box; 4. Water-cooled device; 5. Profile; 6. Cooling die; 7. Cooling channel; 8. Groove; 9. Air-cooled opening; 10. Cooling air duct; 11. Base; 12. Lifting device; 13. Water-cooled equipment; 14. Temperature control probe; 15. Automatic control box; 16. Control valve. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] The temperature of pultruded profiles exiting the die is generally in the range of 160~200℃. When the pultrusion speed is below 1.2m / min, existing technologies such as... Figure 1 As shown, the profile 5 can be cooled by increasing the traction distance (the distance from the outlet of the pultrusion die 1 to the inlet of the traction machine 2), setting up an air-cooled box 3, a water-cooled device 4, or a combination of both, so that the temperature of the profile 5 at the inlet of the traction machine 2 is reduced to below 60°C. Otherwise, the profile 5 with an excessively high temperature will not be sufficiently cured and will be easily deformed by the traction machine 2 when it enters the traction machine 2, resulting in the scrapping of the profile 5 product.

[0028] Currently, the pultrusion speed of pultruded profiles has exceeded 2.0 m / min and is still gradually increasing. Due to the limited space in the workshop, it is impossible to reserve too much cooling space for the pultrusion line. The commonly used cooling methods are poor in single-method cooling and cannot meet the high-speed pultrusion conditions. The simple combination of multiple methods such as air cooling and water cooling can meet the cooling requirements, but the product shaping effect is poor.

[0029] To address the increasing technical challenges of pultrusion speeds, a dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles is proposed, comprising a cooling die 6, and a portion of the cooling die 6 as shown in the image. Figure 2 As shown, the cooling mold 6 is provided with a through cooling channel 7. The cross-sectional shape of the cooling channel 7 is consistent with the outer contour of the profile 5, which is used for the profile 5 to be cooled to pass through and gradually complete the solidification and cooling process in the cooling channel 7. The cross-sectional contour of the cooling channel 7 transitions smoothly at the groove position of the outer contour of the profile 5 to simplify the manufacturing difficulty of the cooling channel 7. The cooling mold 6 is provided with a water cooling pipeline to cool the entire cooling mold 6 by water cooling and to achieve the cooling of the profile 5 through the heat exchange process between the cooling mold 6 and the profile 5.

[0030] The sidewall of the cooling channel 7 is recessed in a section perpendicular to the conveying direction of the profile 5, moving away from the profile 5, forming a groove 8 with a width of 1 cm and a depth of 5 mm. Specifically... Figure 2In the cooling channel 7, the cooling channel 7 is a continuous channel along the length of the profile 5. The groove 8 is annular and surrounds the profile 5. The grooves 8 are distributed at intervals along the length of the profile 5. A set number of grooves 8 have air-cooling openings 9 at their bottoms, so that the cooling air can be evenly distributed in the grooves 8. The cooling air can be blown into the interior of the cooling channel 7, mainly for cooling the grooves of the profile. The air-cooling openings 9 are connected to the cooling air duct 10, so that the external cooling air can be used to cool the grooves. Since the cross-sectional shape of the cooling channel 7 is consistent with the outer contour of the profile 5, and the gaps in the grooves of the profile are larger, the cooling air will mainly pass through the grooves of the profile with lower air resistance and be discharged from the openings at both ends of the cooling mold 6. That is, the cooling air is supplemented in the grooves of the profile where heat exchange with the inner wall of the cooling channel 7 is difficult, so that the cooling and curing degree of the grooves of the profile and other positions is uniform, reducing the internal stress caused by uneven temperature.

[0031] like Figure 2 As shown, the cross-sectional shape of the cooling channel 7 is separated from the outer contour of the profile 5 by a set gap, and the gap gradually decreases in the conveying direction of the profile 5, with a gap of 0.1 mm at the profile outlet. After the profile 5 is output from the pultrusion die 1, it still has a relatively high temperature and is not completely solidified, and has a certain degree of plasticity. During the process of the profile 5 passing through the double-effect cooling die, it gradually cools down and solidifies. Therefore, the cooling channel 7 has the function of constraining and shaping the profile 5 during the cooling and solidification process. Strictly controlling the gap between the cooling channel 7 and the profile 5 can further improve the straightness of the profile 5. Correspondingly, in this process, the cooling channel 7 applies resistance to the profile 5 in the opposite direction to the conveying direction of the profile 5, and the resistance is controlled to be less than 100 N, which has little impact on the traction machine 2.

[0032] like Figure 3 As shown, the cooling mold 6 is set on the base 11 with a self-lubricating device and can swing on a horizontal plane parallel to the conveying direction of the profile 5. The straightness is adaptive by the tension between the traction machine 2 downstream of the cooling mold 6 and the pultrusion mold 1 upstream of the cooling mold 6, without the need for straightening, which is convenient for operation.

[0033] The cooling mold 6 includes an upper mold and a lower mold. The upper mold is connected to the hoisting and lifting device 12 for easy maintenance. During normal production, the upper mold and the lower mold are closed to form a complete cooling channel 7. When the machine is stopped for maintenance, the upper mold is raised to open the cooling channel 7. The upper mold is installed in a hoisting manner, which is conducive to the cooling mold 6 swinging within a set range on the self-lubricating base 11.

[0034] like Figure 4As shown, there are multiple grooves 8 with air-cooling openings 9, and these grooves 8 are distributed sequentially along the conveying direction of the profile 5. The cooling air duct 10 is set in the cooling mold 6. The cooling air duct 10 is connected to the compressed air pipeline. In this embodiment, the external air source is compressed air, so that the cooling air output from the air-cooling opening 9 is basically the same as the temperature of the cooling mold 6. Therefore, the temperature of the profile groove at this position is basically the same as the temperature at other positions, thereby making the cooling and curing degree uniform. On the other hand, since there is a set gap between the inner wall of the cooling channel 7 and the profile 5, cooling air also flows out through this gap. At this time, the role of the cooling air is to maintain the positive pressure state of the cooling channel 7, maintain the air gap between the inner wall of the cooling channel 7 and the profile 5, and improve the heat exchange effect.

[0035] like Figure 3 As shown, the water cooling pipes inside the cooling mold 6 are connected to the water cooling equipment 13, which are used to deliver cooling water to the cooling mold 6.

[0036] A control valve 16 is installed on the connection pipe between the water cooling pipe inside the cooling mold 6 and the water cooling equipment 13 to regulate the flow rate of cooling water inside the cooling mold 6.

[0037] Temperature control probes 14 are installed at the inlet and outlet of the cooling channel 7, and temperature control probes 14 are installed at a set position between the inlet and outlet to accurately grasp the cooling process of the profile 5 and flexibly adjust the temperature gradient at different positions of the cooling mold 6. Multiple temperature control probes 14 are connected to the automatic control box 15. The automatic control box 15 is equipped with a PLC to control the operation of the water cooling equipment 13, control valve 16, hoisting and lifting device 12 and temperature control system to realize automatic steady-state control of the temperature of the cooling mold 6.

[0038] like Figure 5 As shown, the dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles can include multiple cooling dies 6, which are linearly distributed in the conveying direction of the profile 5. Due to limitations in processing technology and cost, the length of a single cooling die 6 is generally in the range of 2.0~2.5m, which can achieve good cooling and shaping effect of the profile 5 within a pultrusion speed of up to 2.0m / min, and the final cooling temperature of the profile 5 can be lower than 50℃. When the pultrusion speed exceeds 2.0m / min, or when a single cooling die cannot meet the cooling requirements, multiple sets of cooling dies 6 are connected in series to achieve a larger temperature gradient during the cooling and solidification process of the profile 5, so as to meet the cooling and shaping requirements.

[0039] During the production of profile 5, the upper mold is in a raised state before the pultrusion system is started. After the pultrusion system is started and the product quality is stable, the hoisting lifting device 12 closes the upper mold through the control knob of the automatic control box 15. Due to the pulling force of the traction machine 2, profile 5 is in a tensile state. Profile 5 is subjected to resistance in the opposite direction of conveying inside the cooling mold 6. Due to the low friction of the base 11, the cooling mold 6 can automatically adjust its angle in the horizontal direction to make itself parallel to profile 5. After the compressed air valve is opened, the compressed air can be evenly distributed on the outer periphery of profile 5 through the annular air channel formed by the grooves 8 inside the cooling mold 6 and flow towards the groove position to remove the heat from the surface of profile 5 and achieve cooling. After the water cooling equipment 13 is turned on, the composite material pultruded profile dual-effect temperature control cooling and shaping device starts to work. The inlet and outlet temperatures of multiple temperature zones before and after the cooling and shaping device are set. Through the temperature signals fed back by the temperature control probes 14 at the corresponding positions, the control system automatically adjusts the flow rate of cooling circulating water through the opening of multiple control valves 16.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles, characterized in that, The device includes a cooling mold with a through cooling channel. The cross-sectional shape of the cooling channel is consistent with the outer contour of the profile cross-section and transitions smoothly at the groove position of the profile cross-section. The cooling mold is equipped with water cooling pipes. The sidewall of the cooling channel is recessed away from the profile on a cross-section perpendicular to the profile conveying direction, forming a groove with a set width and depth. The groove has an air-cooling opening that connects to a cooling air duct.

2. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, The cross-sectional shape of the cooling channel is separated from the outer contour of the profile cross-section by a set gap, and the gap gradually decreases in the profile conveying direction.

3. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, The cooling mold is mounted on a base with a self-lubricating device and can swing on a horizontal plane parallel to the profile conveying direction.

4. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, The cooling mold includes an upper mold and a lower mold, and the upper mold is connected to a hoisting and lifting device.

5. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, There are multiple grooves with air-cooling openings, and the cooling air ducts are set in the cooling mold and connected to an external air source.

6. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, The cooling air duct is connected to the compressed air pipeline.

7. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, The water-cooling pipeline is connected to the water-cooling equipment.

8. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 7, characterized in that, Control valves are installed on the water cooling pipes connecting the cooling mold to the water cooling equipment.

9. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in any one of claims 7-8, characterized in that, Temperature control probes are installed at the inlet and outlet of the cooling channel, and a temperature control probe is installed at a set position between the inlet and outlet; the temperature control probes are connected to the automatic control box, and the automatic control box is connected to the water cooling equipment and the control valve.

10. The dual-effect temperature-controlled cooling and shaping device for composite pultruded profiles as described in claim 1, characterized in that, The profile dual-effect temperature control cooling and shaping device includes multiple cooling molds, which are linearly distributed in the profile conveying direction.

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