High-precision RTM metering device

Abstract

The utility model discloses a high-precision RTM metering device, which comprises a metering device main body, the metering device main body comprises an electric cabinet and a metering pump set, the electric cabinet is arranged on a main frame, the metering pump set is movably arranged on one side of the electric cabinet, and the metering pump set is electrically connected with the electric cabinet. The utility model provides a high precision RTM metering device, the high precision RTM metering device comprises a metering device main body, the metering device main body comprises an electric control box and a metering pump set, the electric control box is installed on a main frame, the metering pump set is movably installed on one side of the electric control box, the metering pump set is electrically connected with the electric control box, and the metering pump set is electrically connected with the metering device main body. Therefore, when the metering device main body is used, parameters can be set through the electric control box, and after the metering pump set is started, the metering pump set heats raw materials in an RTM injection process, so that the raw materials can be injected in a high-precision manner.

Description

Technical Field

[0001] The utility model relates to the technical field of injection metering devices, and more specifically, to a high-precision RTM metering device. Background Art

[0002] RTM process, as a key technology in the field of mixed resin molding, the performance and quality of its products are directly affected by many factors such as resin fluidity, mold temperature distribution and injection pressure. At present, there are mainly two forms of RTM injection process, but they both have certain shortcomings in the material injection process.

[0003] The first form involves injecting the mixed resin into an external barrel and mixing it with a manual stirrer. The mixture is then connected to the mold through a pipeline and introduced into the mold using vacuum negative pressure. However, this method makes it difficult to ensure constant pressure during operation, which may cause uneven flow rate and distribution of the mixed resin in the mold, and then generate bubbles inside the product. The second form is to inject the mixed resin into a sealed container and mix it with an electric stirrer. After mixing, positive pressure is set in the sealed container and negative pressure is set at the mold, and this pressure difference is used to inject the mixed resin into the mold. Although this method improves the degree of automation, it also faces the problem of unstable pressure control.

[0004] Among the existing injection technologies, high-pressure injection RTM, as an important process method, is widely used in the fields of automobiles, aerospace, etc. However, in the process of high-pressure injection RTM, how to achieve accurate metering and high-pressure delivery of the injection has become a key factor restricting product quality and process efficiency. There is no high-pressure injection RTM metering device on the existing market. When implementing the RTM process, it is easy to have incomplete perfusion or unstable pressure, resulting in reduced product performance, poor uniformity of product material, low efficiency, great waste, and difficult cost control. Therefore, it is necessary to propose a high-precision RTM metering device to at least partially solve the problems existing in the prior art. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to at least partially solve the above-mentioned problems, the utility model provides a high-precision RTM metering device, comprising: a metering device body, the metering device body comprising an electrical control box and a metering pump group, the electrical control box is arranged on a main frame, the metering pump group is movably arranged on one side of the electrical control box, and the metering pump group is electrically connected to the electrical control box.

[0007] According to the high-precision RTM metering device of the embodiment of the utility model, the metering pump group includes a servo motor, a pump body, and an injection cylinder body. The servo motor is arranged at one end of the pump body, and the injection cylinder body is arranged at the other end of the pump body. A cylinder piston rotatably connected to the servo motor is arranged in the pump body. A heating part is also arranged on the outer wall of the injection cylinder body, and the heating part is electrically connected to the electric control box.

[0008] According to the high-precision RTM metering device of the embodiment of the utility model, a barrel seat is arranged at one end of the injection cylinder body away from the pump body, and a barrel sealing cover is also arranged on the barrel seat. The barrel sealing cover is provided with a temperature sensor, a first valve, and a pressure sensor. The temperature sensor, the first valve, and the pressure sensor are electrically connected to the electric control box respectively.

[0009] According to the high-precision RTM metering device of the embodiment of the utility model, it also includes: a vacuum pump group, the vacuum pump group includes a buffer tank and a vacuum pump, the vacuum pump is configured on the main frame and located below the electric control box, the buffer tank is located on one side of the electric control box, the vacuum pump is electrically connected to the electric control box, the vacuum pump is connected to the buffer tank, and the buffer tank is respectively connected to the metering pump group and the mold, and the metering pump group is connected to the mold through a high-pressure delivery pipeline.

[0010] According to the high-precision RTM metering device of the embodiment of the utility model, the buffer tank is provided with a second valve, and the second valve is connected to the injection cylinder and the mold through the first high-pressure pipeline and the second high-pressure pipeline respectively.

[0011] According to the high-precision RTM metering device of the embodiment of the utility model, it also includes: a rotating mechanism, which is arranged on the main frame and located at the rear side of the electric control box, the pump body is arranged on the rotating mechanism, and the rotating mechanism is electrically connected to the electric control box.

[0012] According to the high-precision RTM metering device of the embodiment of the utility model, the rotating mechanism includes a rotating bracket and a power unit. The rotating bracket is located at the rear side of the electric control box. Two bearing parts are arranged at the upper end of the rotating bracket. The pump body is connected to the shaft rod in the bearing part. The power unit is arranged on one side of the upper end of the rotating bracket and connected to the shaft rod. The power unit is electrically connected to the electric control box.

[0013] According to the high-precision RTM metering device of the embodiment of the utility model, the power unit includes a power motor and a reduction gearbox, the reduction gearbox is arranged on one side of the rotating bracket, the output shaft of the reduction gearbox is connected to the shaft rod, the power motor is arranged at the bottom of the reduction gearbox, the shaft rod is arranged with a first position sensor, and two second position sensors are arranged in the pump body, and the first position sensor and the second position sensor are electrically connected to the electric control box respectively.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The utility model provides a high-precision RTM metering device, which comprises a metering device main body, and the metering device main body comprises an electric control box and a metering pump group, wherein the electric control box is installed on a main frame, and the metering pump group is movably installed on one side of the electric control box, and the metering pump group is electrically connected to the electric control box, so when the metering device main body is used, parameters can be set through the electric control box, and then after the metering pump group is started, the metering pump group heats the raw materials in the RTM injection process, and then the raw materials can be injected with high precision.

[0016] The high-precision RTM metering device described in the present invention, other advantages, objectives and features of the present invention will be partially reflected through the following description, and will also be partially understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a structural front view of the utility model.

[0020] Figure 3 It is a schematic diagram of part of the internal structure of the metering pump group in the utility model.

[0021] Figure 4 It is a structural left view of the metering pump group in the utility model.

[0022] Figure 5 It is a structural side view of the metering pump group in the utility model.

[0023] Figure 6 It is a schematic diagram of the conveying structure of the metering pump group in the utility model.

[0024] Figure 7It is a schematic diagram of the rotating structure of the metering pump group in the utility model. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0026] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0027] like Figure 1-Figure 7 As shown, the utility model provides a high-precision RTM metering device, including: a metering device body 100, the metering device body 100 includes an electric control box 1 and a metering pump group 2, wherein the electric control box 1 is installed on a main frame 101, the metering pump group 2 is movably installed on one side of the electric control box 1, and the metering pump group 2 is electrically connected to the electric control box 1, so when the metering device body 100 is used, parameters can be set through the electric control box 1, and then after starting the metering pump group 2, the metering pump group 2 heats the raw materials in the RTM injection process, and then the raw materials can be injected with high precision.

[0028] Exemplary metering pump set

[0029] Furthermore, some embodiments of the present invention provide a specific structure of the metering pump group. The metering pump group 2 of the structure includes a servo motor 201, a pump body 202, and an injection cylinder 208. The servo motor 201 is installed at one end of the pump body 202, and the injection cylinder 208 is installed at the other end of the pump body 202. The pump body 202 has a cylinder piston 203, and the servo motor 201 is rotatably connected to the cylinder piston 203. Therefore, after the electric control box 1 starts the servo motor 201, the servo motor 201 drives the cylinder piston 208. 03 can move in the pump body 202; a heating part 204 is also installed on the outer wall of the injection cylinder 208, so after the electric control box starts the heating part 204, it first heats the raw material in the injection cylinder 208 to melt the raw material into a molten state, and then the cylinder piston 203 can make a linear motion in the injection cylinder 208 and extrude the raw material, so that the molten raw material can be injected into the mold, thereby realizing accurate measurement of the raw material, which can reach a flow rate of 0.5cc per minute, and can generate a very high injection pressure according to the power combination.

[0030] Furthermore, in some embodiments of the present invention, a barrel seat 205 is installed at one end of the injection cylinder 208 away from the pump body 202, and a barrel sealing cover 211 is also installed on the barrel seat 205. A temperature sensor 207, a first valve 212, and a pressure sensor 206 are installed on the barrel sealing cover 211, wherein the temperature sensor 207, the first valve 212, and the pressure sensor 206 are electrically connected to the electric control box 1 respectively, so the barrel sealing cover 211 can provide a sealing function for the injection cylinder 208, and the temperature sensor 207, the first valve 212, and the pressure sensor 206 are electrically connected to the electric control box 1 respectively. The sensor 207 can detect the temperature inside the injection cylinder 208. Through precise temperature control, the influence of temperature differences on product differentiation can be reduced. The high-precision metering device adopts multi-point temperature control and heating by the heating part 204. The heating part 204 has high energy conversion efficiency and temperature accuracy of ±1°C; the pressure sensor 206 can detect the pressure inside the injection cylinder 208 to facilitate injection control; and the first valve 212 can adopt an electromagnetic valve, so that the raw materials can be injected conveniently after the first valve 212 is started.

[0031] Exemplary vacuum pump set

[0032] Furthermore, in some embodiments of the present invention, a vacuum pump group 3 is also configured on the main frame 101, wherein the vacuum pump group 3 includes a buffer tank 31 and a vacuum pump 32. Specifically, the vacuum pump 32 is installed on the main frame 101 and is located below the electric control box 1, while the buffer tank 31 is located on one side of the electric control box 1, and the vacuum pump 32 is electrically connected to the electric control box 1, and the buffer tank 31 is respectively connected to the metering pump group 2 and the mold 10, and the metering pump group 2 is connected to the mold 10 through a high-pressure delivery pipeline 21.

[0033] Furthermore, a second valve 301 is installed on the buffer tank 31, and the second valve 301 is connected to the injection cylinder 208 and the mold 10 through the first high-pressure pipeline 302 and the second high-pressure pipeline 303 respectively.

[0034] Therefore, the vacuum pump group is started through the electric control box 1, so the vacuum pump 32 is connected with the buffer tank 31, and after the negative pressure adsorption is provided by the buffer tank 31, the metering pump group 2 and the mold 10 are in a negative pressure state, so after the first valve 212 in the metering pump group 2 is opened, the mold 10 is vacuumed during the conveying process through the first high-pressure pipe, and the second valve 301 on the buffer tank 31 is opened to wait for the mold to exhaust the air. When the gas is exhausted, a small amount of raw material will flow out and be collected by the buffer tank 31. During the raw material conveying process, the pressure of the injection cylinder 208 gradually increases. After the mold gas is completely emptied during the raw material conveying and metering process, the second valve 301 is closed. At this time, the above-mentioned metering pump group 2 and the electric control box 1 maintain a constant pressure on the mold 10 in real time. After the product is formed, the metering pump group 2 returns to the origin to release the pressure.

[0035] Exemplary Rotation Mechanisms

[0036] Furthermore, some embodiments of the utility model provide a specific structure of the above-mentioned rotating mechanism 11, where the rotating mechanism 11 of this structure is installed on the main frame 101 and is located on the rear side of the electric control box 1, and then the above-mentioned pump body 202 can be installed on the rotating mechanism 11, where the rotating mechanism 11 is electrically connected to the electric control box 1, so that the injection cylinder body 208 can be rotated by the rotating mechanism 11, so that it can be rotated from a straight state to a vertical state, or from a vertical state to a straight state.

[0037] Furthermore, the above-mentioned rotating mechanism 11 includes a rotating bracket 12 and a power unit 13. Here, the rotating bracket 12 is installed on the rear side of the electric control box 1. Two bearing members 121 are installed at the upper end of the rotating bracket 12, and the pump body 202 is connected to the shaft 122 in the bearing member 121. The power unit 13 is installed on one side of the upper end of the rotating bracket 12 and is connected to the shaft 122. Therefore, after the power unit 13 is started by the electric control box 1, the power unit 13 drives the shaft 122 to rotate, and then drives the pump body 202 to rotate, thereby realizing the above-mentioned rotation of the injection cylinder body 208 through the rotating mechanism 11, so that it rotates from a straight state to a vertical state, or from a vertical state to a straight state.

[0038] Exemplary power unit

[0039] Further, some embodiments of the present invention provide a specific structure of the power unit 13, wherein the power unit 13 of the structure includes a power motor 14 and a reduction box 15, wherein the reduction box 15 is installed on one side of the rotating bracket 12, and the output shaft of the reduction box 15 is connected to the shaft 122, and the power motor 14 is installed at the bottom of the reduction box 15, and further, a first position sensor 123 is installed on the shaft 122, and the first position sensor 123 is electrically connected to the electric control box 1, and the length direction of the first position sensor 123 and the injection cylinder 208 are the same, so the position information of the injection cylinder 208 is detected by the first position sensor 123, so as to facilitate the injection cylinder 208 to rotate from a straight state to a vertical state, or to rotate from a vertical state back to a straight state;

[0040] Furthermore, two second position sensors 209 are installed in the pump body 202, and the second position sensors 209 are electrically connected to the electric control box 1. The position of the pump body 208 is also detected by the two second position sensors 209, so that the pump body 208 can rotate more accurately.

[0041] In addition, the operator can press the cleaning jog button, and the metering pump group 2 rotates to the cleaning position (from a vertical state to a flat state) through the rotating mechanism 11. The cleaning position is controlled by the first position sensor 123, and the rotation position angle of the pump body at the cleaning position can be adjusted.

[0042] Finally, the barrel seat 205 and the barrel sealing cover 211 are opened to clean the residual raw materials on the inner wall of the barrel. The control system of the metering device and the first position sensor 123 control the metering pump group 2 to slowly move the cylinder piston 203 to the cleaning position outside the cylinder barrel to clean the cylinder piston 203. Replace the sealing assembly at the piston to prepare for the next product.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A high-precision RTM metering device, characterized in that: include: A metering device body (100), the metering device body (100) comprising an electric control box (1) and a metering pump group (2), the electric control box (1) being arranged on a main frame (101), the metering pump group (2) being movably arranged on one side of the electric control box (1), and the metering pump group (2) being electrically connected to the electric control box (1).

2. A high-precision RTM metering device according to claim 1, characterized in that: The metering pump group (2) comprises a servo motor (201), a pump body (202), and an injection cylinder (208); the servo motor (201) is arranged at one end of the pump body (202), and the injection cylinder (208) is arranged at the other end of the pump body (202); a cylinder piston (203) rotatably connected to the servo motor (201) is arranged in the pump body (202); a heating part (204) is also arranged on the outer wall of the injection cylinder (208); and the heating part (204) is electrically connected to the electric control box (1).

3. A high-precision RTM metering device according to claim 2, characterized in that: A barrel seat (205) is arranged at one end of the injection cylinder body (208) away from the pump body (202); a barrel sealing cover (211) is also arranged on the barrel seat (205); a temperature sensor (207), a first valve (212), and a pressure sensor (206) are arranged on the barrel sealing cover (211); the temperature sensor (207), the first valve (212), and the pressure sensor (206) are electrically connected to the electric control box (1), respectively.

4. A high-precision RTM metering device according to claim 2, characterized in that: Also includes: A vacuum pump group (3), the vacuum pump group (3) comprising a buffer tank (31) and a vacuum pump (32), the vacuum pump (32) being arranged on a main frame (101) and located below an electric control box (1), the buffer tank (31) being located on one side of the electric control box (1), the vacuum pump (32) being electrically connected to the electric control box (1), the vacuum pump (32) being in communication with the buffer tank (31), and the buffer tank (31) being respectively in communication with a metering pump group (2) and a mold (10), and the metering pump group (2) being connected to the mold (10) via a high-pressure delivery pipeline (21).

5. A high-precision RTM metering device according to claim 4, characterized in that: The buffer tank (31) is provided with a second valve (301), and the second valve (301) is connected to the injection cylinder (208) and the mold (10) through a first high-pressure pipeline (302) and a second high-pressure pipeline (303) respectively.

6. A high-precision RTM metering device according to claim 2, characterized in that: Also includes: The rotating mechanism (11) is arranged on the main frame (101) and is located at the rear side of the electric control box (1); the pump body (202) is arranged on the rotating mechanism (11); and the rotating mechanism (11) is electrically connected to the electric control box (1).

7. A high-precision RTM metering device according to claim 6, characterized in that: The rotating mechanism (11) comprises a rotating bracket (12) and a power unit (13). The rotating bracket (12) is located at the rear side of the electric control box (1). Two bearing components (121) are arranged at the upper end of the rotating bracket (12). The pump body (202) is connected to a shaft (122) in the bearing component (121). The power unit (13) is arranged at one side of the upper end of the rotating bracket (12) and is connected to the shaft (122). The power unit (13) is electrically connected to the electric control box (1).

8. A high-precision RTM metering device according to claim 7, characterized in that: The power unit (13) comprises a power motor (14) and a reduction gearbox (15). The reduction gearbox (15) is arranged on one side of the rotating bracket (12). The output shaft of the reduction gearbox (15) is connected to the shaft (122). The power motor (14) is arranged at the bottom of the reduction gearbox (15). The shaft (122) is provided with a first position sensor (123). Two second position sensors (209) are provided in the pump body (202). The first position sensor (123) and the second position sensor (209) are respectively electrically connected to the electric control box (1).

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