Airtightness detection device and process for HP-RTM production

Abstract

The invention provides an air tightness detection device and process for HP-RTM production, and belongs to the technical field of air tightness detection. Comprising a device framework and an injection molding workpiece, a top plate is fixedly connected to the top of the device framework, a control box is fixedly connected to one side of the top of the top plate, an output hole is formed in the top of the injection molding workpiece, and an input hole is formed in one side of the injection molding workpiece; the first assembly is used for achieving feeding and preliminary airtightness detection of injection molding workpieces, and the first assembly is connected with the top plate; and the second assembly is used for carrying out secondary airtightness detection and blanking on the injection molding workpiece. By arranging the first assembly and the second assembly, airtightness detection can be automatically and continuously carried out on multiple workpieces, the detection efficiency is greatly improved, the detection accuracy can be greatly improved through two sets of different detection modes, and the device is worthy of application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to an air tightness detection device and process for HP-RTM production. Background Art

[0002] At present, the main composite forming technologies include compression molding, vacuum autoclave molding, resin transfer molding, and high-pressure resin transfer molding. For compression molding, the productivity of small and medium-sized components is high, but for complex components, more complex mold equipment is required, the cost is high, and the moldability of some complex contours and local complex features is poor. The non-vacuum molding environment also leads to high component porosity and low overall performance. Vacuum autoclave molding is widely used in composite material molding, but the production and research costs are relatively high. When preparing some complex multi-curvature components, it is also prone to problems such as thinning at corners and delamination defects, and the production efficiency is relatively low. For the traditional RTM molding process, its molding method is simple and the process flow accuracy is easy to control, but it is easy to have uneven resin flow, resulting in surface defects such as pores and dry spots on the components. When molding complex components, it is limited by the extreme injection pressure, the local complex structure is not fully impregnated, and the performance quality of the components is low. Therefore, HP-RTM, derived from the RTM molding process, came into being. In the HP-RTM process production, it is necessary to perform airtightness testing on the inside of the preform mold to ensure the effectiveness of the mold.

[0003] However, during use, the airtightness detection device of the existing HP-RTM process usually requires real-time control by an operator. The workpieces need to be placed one by one for inspection, and then removed after the inspection is completed, and then another airtightness inspection is performed. The use process is not consistent enough, resulting in low efficiency and difficulty in meeting existing needs. Therefore, the present invention provides an airtightness detection device and process for HP-RTM production to meet the needs. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] An airtightness detection device and process for HP-RTM production, comprising a device frame and an injection molded workpiece, wherein a top plate is fixedly connected to the top of the device frame, a control box is fixedly connected to one side of the top of the top plate, an output hole is provided at the top of the injection molded workpiece, and an input hole is provided at one side of the injection molded workpiece; a No. 1 component, wherein the No. 1 component is used for realizing the loading and preliminary airtightness detection of the injection molded workpiece, and the No. 1 component is connected to the top plate; a No. 2 component, wherein the No. 2 component is used for the secondary airtightness detection and unloading of the injection molded workpiece, and the No. 2 component is connected to the top plate; and a support component, wherein the support component is used for supporting and moving the device frame, and the support component is connected to the device frame.

[0006] Optionally, the top plate is located above the outside of component No. 1 and is fixedly connected to a protective frame, and the component No. 1 includes a group of transmission frames symmetrically fixedly connected to the top of the top plate, wherein one end of the top of one of the transmission frames is fixedly connected to a transmission motor, a transmission screw is fixedly connected to the output shaft of the transmission motor, the external thread of the transmission screw is connected to a transmission block, and the tops of two transmission frames are both slidably connected to transmission blocks, the tops of the two transmission blocks are fixedly connected to transmission seats, the top of the transmission seat is fixedly connected to a cylinder, and the telescopic end of the cylinder is fixedly connected to a suction cup assembly.

[0007] Optionally, a loading rack is fixedly connected to the top of the top plate below the moving path of the suction cup assembly.

[0008] Optionally, the interior of the device skeleton is fixedly connected to a base plate, the top of the base plate is fixedly connected to a support seat, the interior of the support seat is fixedly connected to an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected to a movable seat, the interior of the movable seat is fixedly connected to a docking joint, a sealing member is clamped on the outside of one end of the docking joint, the other end of the docking joint is fixedly connected to a connecting conduit, one end of the connecting conduit is fixedly connected to the interior of the top plate, and the end of the connecting conduit located at the top of the top plate is fixedly connected to a pressure display gauge, and a booster pipe connection is provided on the outside of the connecting conduit.

[0009] Optionally, a fixing part and a protective cover are fixedly connected to the top of the support seat, the fixing part is located inside the protective cover, and a docking hole is provided on the opposite surface of the protective cover and the docking head, and the docking hole is located on one side of the injection workpiece input hole, and the moving path of the suction cup assembly is located above the injection workpiece output hole.

[0010] Optionally, the second component includes a rotating motor fixedly connected to the bottom of the top plate, a driving wheel is fixedly connected to the output shaft of the rotating motor, a fixing seat is fixedly connected to the top of the top plate, a rotating shaft is internally rotatably connected to the fixing seat, a driven wheel is externally fixedly connected to the bottom end of the rotating shaft, a cross rotating disk is externally fixedly connected to the top end of the rotating shaft, the driven wheel and the driving wheel are connected via a transmission belt, fixing parts are fixedly connected to the four sides of the top of the cross rotating disk, the injection molded workpiece is clamped inside the fixing part, and the fixing seat on one side of the cross rotating disk is located below the moving path of the suction cup assembly.

[0011] Optionally, a limited cavity is provided inside the top of the fixing member, and side frames are fixedly connected to the four sides of the top of the fixing member, and the side frames on the two long sides of the top of the fixing member have different heights, and the height of the side frame located on the side of the input hole of the injection molded workpiece is smaller than the length between the input hole and the bottom of the injection molded workpiece, and an elastic member is provided on the contact surface between the other side frame and the injection molded workpiece, and the elastic member and the injection molded workpiece are provided with protrusions at both ends, and a deformation cavity is provided between the elastic member and the side frame.

[0012] Optionally, the top of the top plate is fixedly connected to motor No. 1, the output shaft of the motor No. 1 is fixedly connected to screw No. 1, the external thread of the screw No. 1 is connected to thread block No. 1, the external part of the thread block No. 1 is fixedly connected to a transmission plate, the interior of the transmission plate is fixedly connected to motor No. 2, the output shaft of the motor No. 2 is fixedly connected to a detection head, the detection head is located on one side of the injection workpiece input hole inside the fixing part, the top of the top plate located above motor No. 1 is fixedly connected to a gantry, the top of the gantry is fixedly connected to a fixing frame, the top of the fixing frame is fixedly connected to a hydraulic cylinder, the telescopic end of the hydraulic cylinder is fixedly connected to a sealing plate, the bottom of the sealing plate is fixedly connected to a sealing gasket, and the sealing end is located above the rotation path of the injection workpiece output hole.

[0013] Optionally, a flow channel is provided inside the docking joint, a deformation cavity is provided in the inner wall of the docking joint, a fitting protrusion integrally formed with the deformation cavity is provided outside the docking joint, and the cross-section of the deformation cavity is a transverse "8" shape.

[0014] The present invention also provides an airtightness detection process for HP-RTM production, comprising the following steps:

[0015] Step 1, convey the injection molded workpiece to be tested for air tightness to the top of the loading rack through the conveyor belt. At this time, the transmission motor located on the top of the transmission rack can be started, and its output shaft drives the transmission screw to rotate. Since the transmission screw is threadedly connected to the transmission block, the rotation of the transmission screw causes the two transmission blocks to slide in the transmission rack, thereby driving the transmission seat to move in a straight line. When the transmission seat drives the cylinder to move above the loading rack, the telescopic end of the cylinder extends, the suction cup assembly descends and contacts the injection molded workpiece, and the injection molded workpiece is sucked up by the suction cup. The cylinder continues to drive the suction cup assembly and the injection molded workpiece to move above the support seat, and the telescopic end of the cylinder drives the suction cup assembly and the injection molded workpiece to move downward, so that the injection molded workpiece is embedded in the interior of the fixing on the top of the support seat. At this time, the suction cup of the suction cup assembly realizes the sealing of the injection molded workpiece output hole;

[0016] Step 2: When the support seat is completely embedded in the interior of the fixing part, start the electric telescopic rod, which extends to push the movable seat and the docking joint close to the injection molded workpiece. The sealing member on the docking joint is docked with the input hole of the injection molded workpiece. Gas is injected into the connecting conduit through the connection of the booster pipe. The gas enters the docking joint through the connecting conduit and then enters the injection molded workpiece. Observe the reading of the pressure display gauge to preliminarily judge the air tightness of the injection molded workpiece.

[0017] Step 3. After the preliminary inspection is completed, the suction cup assembly can be started again. The suction cup assembly absorbs the injection molded workpiece and drives it to move upward. At the same time, the transmission seat drives the cylinder to move above the top fixing of the cross rotating disk. The suction cup assembly extends again, so that the injection molded workpiece is embedded in the inside of the top fixing of the cross rotating disk, and the injection molded workpiece is released. At this time, the suction cup assembly and the transmission seat are reset to prepare for the processing of the next workpiece;

[0018] Step 4, start the rotating motor to drive the driving wheel to rotate, and transmit the power of the driving wheel to the driven wheel through the transmission belt, thereby driving the rotating shaft and the cross rotating disk to rotate. The injection molded workpiece is fixed in the fixing part of the cross rotating disk and rotates with the cross rotating disk. When the injection molded workpiece rotates to the detection position of the detection head, it stops rotating, and the No. 1 motor drives the No. 1 screw to rotate, so that the No. 1 thread block and the transmission plate move in a straight line. The No. 2 motor is started to drive the detection head close to the input hole of the injection molded workpiece, and the injection molded workpiece is subjected to a more detailed air tightness test through the detection head, including pressure test and leakage test. At this time, the hydraulic cylinder extends to push the sealing plate down, and the sealing gasket is connected to the output hole of the injection molded workpiece to ensure that the gas will not leak during the movement. When the detection is completed, the cross rotating disk rotates again, so that the fixed part after the detection will move to the bottom of the moving path of the suction cup assembly. At this time, the suction cup assembly can suck it up again for unloading, and the next injection molded workpiece can be prepared for air tightness test.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above scheme, by setting up component No. 1 and component No. 2, multiple workpieces can be automatically and continuously tested for air tightness, which not only greatly improves the efficiency of testing, but also the two sets of different testing methods can greatly improve the accuracy of testing, which is worthy of promotion and use.

[0021] In the above scheme, by setting a fixing part, the design of the fixing part takes into account the shape and size of the injection molded workpiece, and provides buffering and stability through the elastic part and the deformation cavity to ensure accuracy and safety during the detection process.

[0022] In the above scheme, the deformation compartment and fitting protrusion design inside the joint can provide a better sealing effect during the docking process, while adapting to the input holes of injection molded workpieces of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the airtightness detection device used in HP-RTM production;

[0025] Figure 2 It is a schematic diagram of the coordinated three-dimensional structure of the airtight detection device;

[0026] Figure 3 This is a schematic diagram of the coordinated three-dimensional structure of component No. 2;

[0027] Figure 4 This is a schematic diagram of the coordinated three-dimensional structure of component No. 2;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixing parts;

[0029] Figure 6 This is a schematic diagram of the coordinated three-dimensional structure of component No. 1;

[0030] Figure 7 This is a schematic diagram of the coordinated three-dimensional structure of component No. 1;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the mating parts.

[0032] [reference numerals]

[0033] 1. Device skeleton; 2. Support assembly; 3. Top plate; 4. Control box; 5. Protection frame; 6. No. 1 motor; 7. No. 1 screw; 8. No. 1 thread block; 9. Transmission plate; 10. No. 2 motor; 11. Detection head; 12. Gantry; 13. Fixed frame; 14. Hydraulic cylinder; 15. Sealing plate; 16. Injection workpiece; 17. Rotating motor; 18. Driving wheel; 19. Driven wheel; 20. Conveyor belt; 21. Fixed seat; 22. Cross rotating disk; 23 , fixing part; 231, limiting cavity; 232, side frame; 233, elastic part; 234, deformation cavity; 24, bottom plate; 25, transmission frame; 26, transmission seat; 27, loading rack; 28, protective cover; 29, cylinder; 30, suction cup assembly; 31, support seat; 32, electric telescopic rod; 33, moving seat; 34, docking joint; 35, connecting duct; 36, sealing part; 361, circulation channel; 362, deformation compartment; 37, pressure display gauge.

[0034] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0035] The following is a detailed description of an airtight detection device and process for HP-RTM production provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0036] like Figures 1 to 8As shown, an embodiment of the present invention provides an airtight detection device and process for HP-RTM production, including a device skeleton 1 and an injection molded workpiece 16, the top of the device skeleton 1 is fixedly connected to a top plate 3, one side of the top of the top plate 3 is fixedly connected to a control box 4, the top of the injection molded workpiece 16 is provided with an output hole, one side of the injection molded workpiece 16 is provided with an input hole, and a component No. 1 is used to realize the loading and preliminary airtightness detection of the injection molded workpiece 16, the component No. 1 is connected to the top plate 3, the top plate 3 is located above the outside of the component No. 1 and is fixedly connected to a protective frame 5, the component No. 1 includes a group of transmission frames 25 symmetrically fixedly connected to the top of the top plate 3, one end of the top of one of the transmission frames 25 is fixedly connected to a transmission motor, and the output shaft of the transmission motor A transmission screw is fixedly connected to the top, and a transmission block is connected to the external thread of the transmission screw, and the tops of the two transmission frames 25 are slidably connected to the transmission blocks, the tops of the two transmission blocks are fixedly connected to the transmission seat 26, the top of the transmission seat 26 is fixedly connected to the cylinder 29, the telescopic end of the cylinder 29 is fixedly connected to the suction cup assembly 30, the top of the top plate 3 located below the moving path of the suction cup assembly 30 is fixedly connected to the loading rack 27, the inside of the device skeleton 1 is fixedly connected to the bottom plate 24, the top of the bottom plate 24 is fixedly connected to the support seat 31, the inside of the support seat 31 is fixedly connected to the electric telescopic rod 32, the telescopic end of the electric telescopic rod 32 is fixedly connected to the moving seat 33, the inside of the moving seat 33 is fixedly connected to the docking head 34, the external clamp at one end of the docking head 34 A sealing member 36 is connected, and the other end of the butt joint 34 is fixedly connected to a connecting conduit 35, one end of the connecting conduit 35 is fixedly connected to the inside of the top plate 3, and the end of the connecting conduit 35 located at the top of the top plate 3 is fixedly connected to a pressure display gauge 37, and a pressurized pipeline connection is arranged outside the connecting conduit 35, and the top of the support seat 31 is fixedly connected to a fixing member 23 and a protective cover 28, the fixing member 23 is located inside the protective cover 28, and a butt hole is provided on the opposite surface of the protective cover 28 and the butt joint 34, and the butt hole is located on one side of the input hole of the injection molded workpiece 16, and the moving path of the suction cup assembly 30 is located above the output hole of the injection molded workpiece 16. During the working process, the injection molded workpiece 16 to be tested for air tightness is transported to the top of the loading rack 27 through the conveyor belt. At this time, the transmission motor located at the top of the transmission frame 25 can be started, and its output shaft drives the transmission screw to rotate. Since the transmission screw is threadedly connected to the transmission block, the rotation of the transmission screw causes the two transmission blocks to slide in the transmission frame 25, thereby driving the transmission seat 26 to move in a straight line. When the transmission seat 26 drives the cylinder 29 to move above the loading rack 27, the telescopic end of the cylinder 29 extends, the suction cup assembly 30 descends and contacts the injection molded workpiece 16, and the injection molded workpiece 16 is sucked up by the suction cup. The cylinder 29 continues to drive the suction cup assembly 30 and the injection molded workpiece 16 to move above the support seat 31, and the telescopic end of the cylinder 29 drives the suction cup assembly 30 and the injection molded workpiece 16 to move downward, so that the injection molded workpiece 16 is embedded in the interior of the fixing part 23 at the top of the support seat 31.At this time, the suction cup of the suction cup assembly 30 realizes the sealing of the output hole of the injection molded workpiece 16. When the support seat 31 is completely embedded in the interior of the fixing member 23, the electric telescopic rod 32 is started, and the electric telescopic rod 32 extends, pushing the moving seat 33 and the docking joint 34 close to the injection molded workpiece 16. The sealing member 36 on the docking joint 34 docks with the input hole of the injection molded workpiece 16, and gas is injected into the connecting conduit 35 through the connection of the booster pipe. The gas enters the docking joint 34 through the connecting conduit 35 and then enters the injection molded workpiece 16. Observe the reading of the pressure display gauge 37 to preliminarily judge the airtightness of the injection molded workpiece 16.

[0037] In this embodiment, if Figures 1 to 5The second component shown is used for secondary airtightness detection and unloading of the injection molded workpiece 16. The second component is connected to the top plate 3. The second component includes a rotating motor 17 fixedly connected to the bottom of the top plate 3. A driving wheel 18 is fixedly connected to the output shaft of the rotating motor 17. A fixing seat 21 is fixedly connected to the top of the top plate 3. The internal rotation of the fixing seat 21 is connected to a rotating shaft. The external bottom end of the rotating shaft is fixedly connected to a driven wheel 19. The external top end of the rotating shaft is fixedly connected to a cross rotating disk 22. The driven wheel 19 and the driving wheel 18 are connected through a transmission belt 20. The four sides of the top of the cross rotating disk 22 are fixedly connected to fixing parts 23. The injection molded workpiece 16 is clamped inside the fixing part 23. The fixing seat on one side of the cross rotating disk 22 21 is located below the moving path of the suction cup assembly 30, the top of the top plate 3 is fixedly connected to the No. 1 motor 6, the output shaft of the No. 1 motor 6 is fixedly connected to the No. 1 screw 7, the external thread of the No. 1 screw 7 is connected to the No. 1 thread block 8, the outside of the No. 1 thread block 8 is fixedly connected to a transmission plate 9, the inside of the transmission plate 9 is fixedly connected to the No. 2 motor 10, the output shaft of the No. 2 motor 10 is fixedly connected to a detection head 11, the detection head 11 is located on one side of the input hole of the injection molded workpiece 16 inside the fixing part 23, the top of the top plate 3 located above the No. 1 motor 6 is fixedly connected to a gantry 12, the top of the gantry 12 is fixedly connected to a fixing frame 13, the top of the fixing frame 13 is fixedly connected to a hydraulic cylinder 14, and the telescopic end of the hydraulic cylinder 14 is fixedly connected to a sealing plate 15 , a sealing pad is fixedly connected to the bottom of the sealing plate 15, and the sealing end is located above the rotation path of the output hole of the injection molded workpiece 16. After the preliminary inspection is completed, the suction cup assembly 30 can be started again, the suction cup assembly 30 adsorbs the injection molded workpiece 16 and drives it to move upward, and at the same time, the transmission seat 26 drives the cylinder 29 to move above the top fixing piece 23 of the cross rotating disk 22, and the suction cup assembly 30 extends again, so that the injection molded workpiece 16 is embedded in the inside of the top fixing piece 23 of the cross rotating disk 22, and the injection molded workpiece 16 is released. At this time, the suction cup assembly 30 and the transmission seat 26 are reset to prepare for the processing of the next workpiece, and the rotating motor 17 is started to drive the driving wheel 18 to rotate, and the power of the driving wheel 18 is transmitted to the driven wheel 19 through the transmission belt 20, thereby driving the rotating shaft The cross rotating disk 22 rotates, and the injection molded workpiece 16 is fixed in the fixing part 23 of the cross rotating disk 22 and rotates with the cross rotating disk 22. When the injection molded workpiece 16 rotates to the detection position of the detection head 11, it stops rotating, and the No. 1 motor 6 drives the No. 1 screw 7 to rotate, so that the No. 1 threaded block 8 and the transmission plate 9 move in a straight line. The No. 2 motor 10 starts and drives the detection head 11 to approach the input hole of the injection molded workpiece 16. The injection molded workpiece 16 is subjected to a more detailed air tightness test through the detection head 11, including pressure test and leakage test. At this time, the hydraulic cylinder 14 extends to push the sealing plate 15 down, and the sealing gasket is docked with the output hole of the injection molded workpiece 16 to ensure that the gas will not leak during the movement. When the detection is completed, the cross rotating disk 22 rotates again.The fixed part 23 after the inspection will move to the lower part of the moving path of the suction cup assembly 30. At this time, the suction cup assembly 30 can suck it up again for unloading, and the next injection molded workpiece 16 can be prepared for air tightness inspection.

[0038] In this embodiment, if Figure 1 to Figure 2 As shown, the support component 2 is used to support and move the device frame 1. The support component 2 is connected to the device frame 1. The casters at the bottom of the support component 2 can facilitate the movement of the device, and the telescopic rod at the bottom of the support component 2 can support the device.

[0039] In this embodiment, if Figure 5As shown, a limiting cavity 231 is provided inside the top of the fixing member 23, and side frames 232 are fixedly connected around the top of the fixing member 23. The side frames 232 on the two long sides of the top of the fixing member 23 have different heights. The height of the side frame 232 located on the side of the input hole of the injection molded workpiece 16 is less than the length between the input hole and the bottom of the injection molded workpiece 16. An elastic member 233 is provided on the contact surface between the other side frame 232 and the injection molded workpiece 16. The elastic member 233 and the injection molded workpiece 16 are provided with protrusions at both ends, and a deformation cavity 234 is provided between the elastic member 233 and the side frame 232. The limiting cavity 231 is provided inside the top of the fixing member 23, and its main function is to provide a space for accommodating and limiting the movement of the injection molded workpiece 16 in the vertical direction. When the injection molded workpiece 16 is placed on the fixing member 23, its bottom or specific part will enter the limiting cavity 231, thereby achieving preliminary positioning and fixing. The side frame 232 is fixedly connected to the four sides of the top of the fixing member 23 to form a lateral support for the injection molded workpiece 16. In particular, the side frames 232 on the two long sides of the top of the fixing member 23 have different heights. This design takes into account the specific shape and requirements of the injection molded workpiece 16. The height value of the side frame 232 located on the side of the input hole of the injection molded workpiece 16 is less than the length value between the input hole and the bottom of the injection molded workpiece 16. This design allows the input hole part of the injection molded workpiece 16 to remain exposed during the inspection process, which is convenient for docking and sealing of the joint 34, and does not affect the fixing of other parts of the workpiece. An elastic member 233 is provided on the contact surface between the other side frame 232 and the injection molded workpiece 16, which further enhances the stability and adaptability of the fixation. The elastic member 233 is arranged between the side frame 232 and the injection molded workpiece 16, and its material has a certain elasticity and restoring force. When the injection molded workpiece 16 is placed on the fixing member 23, the elastic member 233 will deform to fill the gap between the injection molded workpiece 16 and the side frame 232, thereby achieving close fitting and fixation. The deformation cavity 234 provides space for the deformation of the elastic member 233, ensuring that the elastic member 233 can deform freely without restriction during the fixing process. Through the synergistic effect of the limiting cavity 231, the side frame 232 and the elastic member 233, the fixing member 23 can achieve multi-point and multi-directional fixation of the injection molded workpiece 16, effectively preventing the workpiece from moving and The shaking can improve the accuracy and stability of the detection, especially the design of different heights of the side frame 232 and the use of the elastic member 233, so that the fixing member 23 can adapt to the injection molded workpieces 16 of different sizes and shapes within a certain range, thereby improving the versatility and flexibility of the equipment. The buffering effect of the elastic member 233 can reduce the damage to the surface of the injection molded workpiece 16, and prevent unnecessary wear on the detection equipment due to over-tightening. The fixing member 23 is reasonably designed and easy to operate, and can quickly and accurately complete the fixing of the injection molded workpiece 16, thereby improving the detection efficiency.

[0040] In this embodiment, if Figure 8As shown, a circulation channel 361 is provided inside the butt joint 34, a deformation compartment 362 is provided in the inner wall of the butt joint 34, and a fitting protrusion integrally formed with the deformation compartment 362 is provided outside the butt joint 34. The cross section of the deformation compartment 362 is a transverse "8" shape. The circulation channel 361 is provided inside the butt joint 34 and is the main channel for gas to enter the injection molded workpiece 16. During the detection process, the external gas source is connected to the butt joint 34 through the connecting conduit 35, and the gas then enters the injection molded workpiece 16 through the circulation channel 361 for air tightness detection. The deformation compartment 362 is provided in the inner wall of the butt joint 34, and its cross section is a transverse "8" shape. This design enables the deformation compartment 362 to deform when subjected to external force, thereby adapting to the input holes of the injection molded workpieces of different sizes and shapes. The fitting protrusion is integrally formed with the deformation compartment 362 and is located outside the butt joint 34. When the docking joint 34 is docked with the input hole of the injection molded workpiece 16, the fitting protrusion first contacts the edge of the input hole, and as the docking joint 34 is further advanced, the deformation compartment 362 is deformed, so that a tight seal is formed between the docking joint 34 and the input hole. The deformation ability of the deformation compartment 362 ensures that the docking joint 34 can fit tightly with input holes of different sizes to prevent gas leakage. After the sealing is completed, the external gas source injects gas into the injection molded workpiece 16 through the circulation channel 361, and the pressure display gauge 37 monitors the gas pressure change in real time. If there is a gas leakage in the injection molded workpiece 16, the reading of the pressure display gauge 37 will drop, indicating a gas leakage problem. The design of the deformation compartment 362 enables the docking joint 34 to adapt to the input holes of the injection molded workpiece 16 of different sizes and shapes, ensuring the tightness and reliability of the seal. This helps to improve the accuracy of air-tightness testing. Since the docking joint 34 can adapt to input holes of different sizes, the device can be used for testing injection molded workpieces 16 of various specifications, enhancing the versatility and flexibility of the device. The one-piece molding design of the fitting protrusion and the deformation cavity 362 reduces friction and wear during the sealing process, helping to extend the service life of the docking joint 34.

[0041] The present invention also provides an airtightness detection process for HP-RTM production, comprising the following steps:

[0042] Step 1, convey the injection molded workpiece 16 to be tested for air tightness to the top of the loading rack 27 through the conveyor belt, at this time, the transmission motor located at the top of the transmission rack 25 can be started, and its output shaft drives the transmission screw to rotate. Since the transmission screw is threadedly connected to the transmission block, the rotation of the transmission screw causes the two transmission blocks to slide in the transmission rack 25, thereby driving the transmission seat 26 to move in a straight line. When the transmission seat 26 drives the cylinder 29 to move above the loading rack 27, the telescopic end of the cylinder 29 extends, and the suction cup assembly 30 descends and contacts the injection molded workpiece 16, and the injection molded workpiece 16 is sucked up by the suction cup. The cylinder 29 continues to drive the suction cup assembly 30 and the injection molded workpiece 16 to move above the support seat 31, and the telescopic end of the cylinder 29 drives the suction cup assembly 30 and the injection molded workpiece 16 to move downward, so that the injection molded workpiece 16 is embedded in the interior of the fixing piece 23 at the top of the support seat 31. At this time, the suction cup of the suction cup assembly 30 realizes the sealing of the output hole of the injection molded workpiece 16;

[0043] Step 2: After the support seat 31 is completely embedded in the fixing member 23, the electric telescopic rod 32 is started, the electric telescopic rod 32 is extended, and the movable seat 33 and the docking joint 34 are pushed close to the injection molded workpiece 16. The sealing member 36 on the docking joint 34 is docked with the input hole of the injection molded workpiece 16. Gas is injected into the connecting conduit 35 through the connection of the booster pipe. The gas enters the docking joint 34 through the connecting conduit 35 and then enters the injection molded workpiece 16. The reading of the pressure display gauge 37 is observed to preliminarily judge the air tightness of the injection molded workpiece 16.

[0044] Step 3: After the preliminary inspection is completed, the suction cup assembly 30 can be started again, and the suction cup assembly 30 absorbs the injection molded workpiece 16 and drives it to move upward. At the same time, the transmission seat 26 drives the cylinder 29 to move above the top fixing piece 23 of the cross rotating disk 22, and the suction cup assembly 30 extends again, so that the injection molded workpiece 16 is embedded in the inside of the top fixing piece 23 of the cross rotating disk 22, and the injection molded workpiece 16 is released. At this time, the suction cup assembly 30 and the transmission seat 26 are reset to prepare for the processing of the next workpiece;

[0045] Step 4: Start the rotating motor 17 to drive the driving wheel 18 to rotate, and transmit the power of the driving wheel 18 to the driven wheel 19 through the transmission belt 20, thereby driving the rotating shaft and the cross rotating disk 22 to rotate. The injection molded workpiece 16 is fixed in the fixing part 23 of the cross rotating disk 22 and rotates with the cross rotating disk 22. When the injection molded workpiece 16 rotates to the detection position of the detection head 11, it stops rotating, and the No. 1 motor 6 drives the No. 1 screw 7 to rotate, so that the No. 1 thread block 8 and the transmission plate 9 move in a straight line, and the No. 2 motor 10 is started to drive the detection head 11 close to the injection molded workpiece 16 The input hole of the injection molded workpiece 16 is subjected to a more detailed air tightness test through the detection head 11, including pressure test and leakage test. At this time, the hydraulic cylinder 14 extends to push the sealing plate 15 down, and the sealing gasket docks with the output hole of the injection molded workpiece 16 to ensure that the gas will not leak during the movement. When the test is completed, the cross rotating disk 22 rotates again, so that the fixed part 23 after the test will move to the bottom of the moving path of the suction cup assembly 30. At this time, the suction cup assembly 30 can suck it up again for unloading, and the next injection molded workpiece 16 can be prepared for air tightness test.

[0046] It should be noted that the circuit control involved in the above scheme is all existing technology, so it will not be described in detail.

[0047] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An airtightness detection device for HP-RTM production, comprising a device frame (1) and an injection molded workpiece (16), characterized in that: A top plate (3) is fixedly connected to the top of the device frame (1), a control box (4) is fixedly connected to one side of the top of the top plate (3), an output hole is opened at the top of the injection molded workpiece (16), and an input hole is opened on one side of the injection molded workpiece (16); A first component, the first component is used to realize the loading and preliminary airtightness detection of the injection molded workpiece (16), and the first component is connected to the top plate (3); A second component, the second component is used for secondary airtightness detection and unloading of the injection molded workpiece (16), and the second component is connected to the top plate (3); A support component (2), the support component (2) is used to support and move the device frame (1), and the support component (2) is connected to the device frame (1).

2. The airtightness detection device for HP-RTM production according to claim 1, characterized in that: The top plate (3) is located above the outside of component No. 1 and is fixedly connected to a protective frame (5). The component No. 1 includes a group of transmission frames (25) symmetrically fixedly connected to the top of the top plate (3), one end of the top of one of the transmission frames (25) is fixedly connected to a transmission motor, a transmission screw is fixedly connected to the output shaft of the transmission motor, the external thread of the transmission screw is connected to a transmission block, and the tops of the two transmission frames (25) are both slidably connected to transmission blocks, the tops of the two transmission blocks are fixedly connected to a transmission seat (26), the top of the transmission seat (26) is fixedly connected to a cylinder (29), and the telescopic end of the cylinder (29) is fixedly connected to a suction cup assembly (30).

3. The airtightness detection device for HP-RTM production according to claim 2, characterized in that: The top of the top plate (3) located below the moving path of the suction cup assembly (30) is fixedly connected to a loading rack (27).

4. The airtightness detection device for HP-RTM production according to claim 3, characterized in that: The interior of the device skeleton (1) is fixedly connected to a bottom plate (24), the top of the bottom plate (24) is fixedly connected to a support seat (31), the interior of the support seat (31) is fixedly connected to an electric telescopic rod (32), the telescopic end of the electric telescopic rod (32) is fixedly connected to a movable seat (33), the interior of the movable seat (33) is fixedly connected to a docking head (34), one end of the docking head (34) is externally clamped with a sealing member (36), the other end of the docking head (34) is fixedly connected to a connecting conduit (35), one end of the connecting conduit (35) is fixedly connected to the interior of the top plate (3), and one end of the connecting conduit (35) located at the top of the top plate (3) is fixedly connected to a pressure display gauge (37), and a booster pipe connection is provided on the exterior of the connecting conduit (35).

5. The airtightness detection device for HP-RTM production according to claim 4, characterized in that: The top of the support seat (31) is fixedly connected with a fixing member (23) and a protective cover (28); the fixing member (23) is located inside the protective cover (28); a docking hole is provided on the opposite surface of the protective cover (28) and the docking head (34); the docking hole is located on one side of the input hole of the injection molded workpiece (16); and the moving path of the suction cup assembly (30) is located above the output hole of the injection molded workpiece (16).

6. The airtightness detection device for HP-RTM production according to claim 4, characterized in that: The second component includes a rotating motor (17) fixedly connected to the bottom of the top plate (3), a driving wheel (18) fixedly connected to the output shaft of the rotating motor (17), a fixed seat (21) fixedly connected to the top of the top plate (3), the fixed seat (21) internally rotatably connected to a rotating shaft, a driven wheel (19) fixedly connected to the outside of the bottom end of the rotating shaft, a cross rotating disk (22) fixedly connected to the outside of the top end of the rotating shaft, the driven wheel (19) and the driving wheel (18) are connected to each other through a transmission belt (20), fixing parts (23) are fixedly connected to the four sides of the top of the cross rotating disk (22), the injection molded workpiece (16) is clamped inside the fixing part (23), and the fixing seat (21) on one side of the cross rotating disk (22) is located below the moving path of the suction cup component (30).

7. The airtightness detection device for HP-RTM production according to claim 6, characterized in that: A limited cavity (231) is provided inside the top of the fixing member (23), and side frames (232) are fixedly connected to the four sides of the top of the fixing member (23). The side frames (232) on the two long sides of the top of the fixing member (23) have different heights. The height of the side frame (232) located on one side of the input hole of the injection molded workpiece (16) is smaller than the length between the input hole and the bottom of the injection molded workpiece (16). An elastic member (233) is provided on the contact surface between the other side frame (232) and the injection molded workpiece (16), and the elastic member (233) and the injection molded workpiece (16) are provided with protrusions at both ends, and a deformation cavity (234) is provided between the elastic member (233) and the side frame (232).

8. The airtightness detection device for HP-RTM production according to claim 7, characterized in that: A No. 1 motor (6) is fixedly connected to the top of the top plate (3); a No. 1 screw rod (7) is fixedly connected to the output shaft of the No. 1 motor (6); the No. 1 screw rod (7) is externally threadedly connected to a No. 1 threaded block (8); a transmission plate (9) is fixedly connected to the outside of the No. 1 threaded block (8); a No. 2 motor (10) is fixedly connected to the inside of the transmission plate (9); a detection head (11) is fixedly connected to the output shaft of the No. 2 motor (10); the detection head (11) is located inside the fixing member (23). The top plate (3) is located on one side of the input hole of the injection molded workpiece (16), the top of the top plate (3) located above the No. 1 motor (6) is fixedly connected to a gantry (12), the top of the gantry (12) is fixedly connected to a fixing frame (13), the top of the fixing frame (13) is fixedly connected to a hydraulic cylinder (14), the telescopic end of the hydraulic cylinder (14) is fixedly connected to a sealing plate (15), the bottom of the sealing plate (15) is fixedly connected to a sealing pad, and the sealing end is located above the rotation path of the output hole of the injection molded workpiece (16).

9. The airtightness detection device for HP-RTM production according to claim 4, characterized in that: A circulation channel (361) is provided inside the butt joint (34), a deformation cavity (362) is provided in the inner wall of the butt joint (34), and a fitting protrusion integrally formed with the deformation cavity (362) is provided outside the butt joint (34), and the cross section of the deformation cavity (362) is in a transverse "8" shape.

10. According to the airtight detection device for HP-RTM production according to any one of claims 1 to 9, the present invention further provides an airtight detection process for HP-RTM production, comprising the following steps: Step 1: The injection molded workpiece (16) to be tested for air tightness is conveyed to the top of the loading rack (27) via a conveyor belt. At this time, the transmission motor located at the top of the transmission rack (25) can be started, and its output shaft drives the transmission screw to rotate. Since the transmission screw is threadedly connected to the transmission block, the rotation of the transmission screw causes the two transmission blocks to slide in the transmission rack (25), thereby driving the transmission seat (26) to move in a straight line. When the transmission seat (26) drives the cylinder (29) to move above the loading rack (27), the telescopic end of the cylinder (29) extends, and the suction cup The assembly (30) descends and contacts the injection molded workpiece (16), and the injection molded workpiece (16) is sucked up by the suction cup. The cylinder (29) continues to drive the suction cup assembly (30) and the injection molded workpiece (16) to move above the support seat (31). The telescopic end of the cylinder (29) drives the suction cup assembly (30) and the injection molded workpiece (16) to move downward, so that the injection molded workpiece (16) is embedded in the interior of the top fixing piece (23) of the support seat (31). At this time, the suction cup of the suction cup assembly (30) realizes the sealing of the output hole of the injection molded workpiece (16); Step 2: After the support seat (31) is completely embedded in the interior of the fixing member (23), the electric telescopic rod (32) is started, the electric telescopic rod (32) is extended, and the movable seat (33) and the docking joint (34) are pushed close to the injection molded workpiece (16). The sealing member (36) on the docking joint (34) is docked with the input hole of the injection molded workpiece (16). Gas is injected into the connecting conduit (35) through the connection of the booster pipe. The gas enters the docking joint (34) through the connecting conduit (35) and then enters the injection molded workpiece (16). The reading of the pressure display gauge (37) is observed to preliminarily judge the air tightness of the injection molded workpiece (16); Step 3: After the preliminary inspection is completed, the suction cup assembly (30) can be started again, and the suction cup assembly (30) absorbs the injection molded workpiece (16) and drives it to move upward. At the same time, the transmission seat (26) drives the cylinder (29) to move above the top fixing piece (23) of the cross rotating disk (22). The suction cup assembly (30) is extended again, so that the injection molded workpiece (16) is embedded in the inside of the top fixing piece (23) of the cross rotating disk (22), and the injection molded workpiece (16) is released. At this time, the suction cup assembly (30) and the transmission seat (26) are reset to prepare for the processing of the next workpiece; Step 4: Start the rotating motor (17) to drive the driving wheel (18) to rotate, and transmit the power of the driving wheel (18) to the driven wheel (19) through the transmission belt (20), thereby driving the rotating shaft and the cross rotating disk (22) to rotate. The injection molded workpiece (16) is fixed in the fixing part (23) of the cross rotating disk (22) and rotates with the cross rotating disk (22). When the injection molded workpiece (16) rotates to the detection position of the detection head (11), it stops rotating, and the No. 1 motor (6) drives the No. 1 screw (7) to rotate, so that the No. 1 thread block (8) and the transmission plate (9) move along a straight line. The No. 2 motor (10) is started to drive the detection head (11) to move close to the detection head (11). The injection molded workpiece (16) is near the input hole of the injection molded workpiece (16), and a more detailed air tightness test is performed on the injection molded workpiece (16) through the detection head (11), including pressure test and leakage test. At this time, the hydraulic cylinder (14) is extended to push the sealing plate (15) down, and the sealing gasket is docked with the output hole of the injection molded workpiece (16) to ensure that the gas will not leak during the movement. When the test is completed, the cross rotating disk (22) rotates again, so that the fixed part (23) after the test will move to the bottom of the moving path of the suction cup assembly (30). At this time, the suction cup assembly (30) can suck it up again for unloading, and the next injection molded workpiece (16) can be prepared for air tightness test.

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