Injection molding quality management and control injection molded part testing device

Abstract

The application discloses an injection molding quality control injection molding part testing device, and belongs to the injection molding part testing field, which comprises a base, an air bag cover plate, a high-pressure gas cylinder, a test push cylinder, a sealing cylinder, an air flow impact assembly, a rupture test assembly, a test table, a positioning groove, a locking mechanism, a fragment scattering test assembly and a projection lamp. The air flow impact assembly is arranged, high-pressure gas is gathered and rotated in the vortex ring generating cavity, and is sprayed out through the energy gathering jet cavity, a speed difference is induced to form a multi-scale vortex, a turbulent turbulent flow field is generated to simulate explosion impact, the fragment interception tower is arranged, low kinetic energy fragments are captured by the adhesive layer, and high kinetic energy fragments are embedded in the interception inner liner to be fixed, so that the number, size, shape, distribution density and direction of the fragments are tested, the rupture test assembly is arranged, when the air bag cover plate fails to be ruptured, the high-pressure nitrogen gas pushes the sealing plunger to slide to expose the pressure relief hole for pressure relief when the air bag cover plate is not ruptured, and the stabilizing rod impacts to trigger the pressure sensor.

Description

Technical Field

[0001] This invention relates to the field of injection molded part testing technology, and in particular to an injection molded part testing device for injection molding quality control. Background Technology

[0002] The airbag cover is one of the injection-molded parts in the automotive airbag system. During the deployment of the airbag, the airbag cover will be ruptured by the deployed airbag, thereby releasing the airbag. The rupture performance and fragment scattering characteristics of the airbag cover are directly related to the airbag deployment effect and occupant safety, so quality inspection is required.

[0003] When an airbag actually deploys, the release of high-pressure nitrogen is accompanied by a transient turbulent flow field. However, existing equipment mostly uses a constant pressure to gradually increase the pressure for testing, which cannot reproduce the stress state of the cover plate when the airbag deploys, resulting in a deviation between the test and the actual working conditions.

[0004] When airbag covers are in use, it is necessary to ensure that the fragments generated when they rupture do not fly toward the driver's face. However, existing testing equipment cannot capture the fragments. Key parameters such as the spatial distribution density and scattering angle of the fragments can only be inferred from two-dimensional images, resulting in an inaccurate assessment of the safety risks of the fragments.

[0005] To address these issues, a testing device for injection molded parts for injection molding quality control is proposed. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of deviation between existing injection molding part testing equipment and actual working conditions, and the inaccurate assessment of fragment safety risks, and to propose an injection molding part testing device for injection molding quality control.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A testing device for injection molded parts for injection quality control includes a base and an airbag cover. The base is provided with a high-pressure gas cylinder and multiple test cylinders. A sealing cylinder is provided on the surface of the base. An airflow impact component is provided inside the sealing cylinder. A rupture test component is provided on the outer wall of the sealing cylinder.

[0009] The airflow impact assembly includes a solenoid valve installed at the output end of a high-pressure gas cylinder, with an airflow impact tube fixedly connected to the top of the solenoid valve, and a porous liner for generating turbulence installed inside the airflow impact tube.

[0010] The rupture test assembly includes a pressure relief pipe connected to the sealing cylinder. The outer wall of the pressure relief pipe has a pressure relief hole. Inside the pressure relief pipe, from the inside out, there are a pressure sensor, a fixing ring, a pressure relief spring, and a sealing plunger.

[0011] A test platform is provided above the base. A control button is provided on the outer wall of the test platform. A positioning groove is provided on the surface of the test platform. A limiting block is provided on the surface of the positioning groove. A limiting spring is provided at the bottom of the limiting block. A handle that penetrates the base is provided on the outer wall of the limiting block. A through positioning groove is provided inside the test platform. A locking mechanism is provided inside the positioning groove. A fragment scattering test assembly and a projection lamp are provided above the test platform.

[0012] The fragment scattering test assembly includes two longitudinally arranged fixed frames and multiple connecting rods, with a fragment interception tower between the fixed frames for intercepting and collecting fragments.

[0013] Preferably, the bottom of the porous liner has multiple vortex ring generating cavities, and the top of the porous liner has multiple eccentrically arranged energy-concentrating jet cavities, with each energy-concentrating jet cavity corresponding to and connected to the vortex ring generating cavity.

[0014] Preferably, the sealing plunger is fixedly connected to the center of the side facing the pressure relief spring with an action stabilizing rod, and the action stabilizing rod is slidably connected to the fixed ring.

[0015] Preferably, the locking mechanism includes a locking groove formed on the inner wall of the positioning groove and an electromagnetic coil installed at the bottom of the test bench. The electromagnetic coil is electrically connected to the control button. A locking block is slidably connected in the locking groove. One side of the locking block is set as an inclined surface for the airbag cover to pass through. A locking spring is fixedly connected to the other side of the locking block. The locking spring is fixedly connected to the inner wall of the locking groove. An actuation groove is provided on the upper surface of the locking block. An actuation frame is provided above the locking block.

[0016] Preferably, the motion frame includes multiple lifting rods, which are slidably connected to electromagnetic coils. A connecting block is fixedly connected to the top of each lifting rod, and guide rods are fixedly connected between the connecting blocks.

[0017] Preferably, the fragment interception tower includes a hexagonal perforated top plate and a perforated bottom plate. A secondary top plate is fixedly connected to the top of the perforated top plate via a support column. Multiple perforated side plates are fixedly connected between the perforated top plate and the perforated bottom plate. A secondary side plate is connected to the outer wall of the perforated side plate via a support column. An interception liner for capturing fragments is adhered to the inner wall of the perforated top plate, the secondary top plate, the perforated side plate, and the secondary side plate. An adhesive layer is provided on the inner wall of the interception liner.

[0018] Preferably, the top of the connecting rod is a grip, the bottom of the connecting rod is threaded, and the bottom of the connecting rod passes through the upper fixed frame, the hollow top plate and the hollow bottom plate and connects to the lower fixed frame.

[0019] Preferably, the projection lamp has a switch on top, a patterned light sheet inside, and a light-shielding sheet is attached to the surface of the patterned light sheet, with rectangular gaps formed between the light-shielding sheets.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention sets up an airflow impact component. After the high-pressure gas enters the inlet (large hole) of the vortex ring generating cavity, the conical structure guides the airflow to converge and accelerate rotation. The accelerated airflow is ejected at high speed through the outlet (small hole) of the energy jet cavity set eccentrically, forming a strong velocity difference with the surrounding gas, inducing shear layer instability, tearing the orderly airflow into multi-scale vortices, and finally forming a highly turbulent flow field in the sealed cylinder test area to simulate the explosion impact.

[0022] 2. This invention sets up a fragment interception tower. Low-energy fragments are captured by the adhesive layer, higher-energy fragments are penetrated and embedded in the interception liner for fixation, and extremely high-energy fragments are intercepted by the multi-layer structure and fixed in the interception liner. Finally, the state of the fragments on the interception liner can truly reflect the instant of rupture, realizing the function of testing the number, size, shape, distribution density and orientation of fragments.

[0023] 3. This invention sets up a rupture test component. When the airbag cover fails to rupture, high-pressure nitrogen pushes the sealing plunger to slide until the pressure relief hole is exposed to release pressure. During pressure relief, the stabilizer rod strikes and triggers the pressure sensor to test the rupture performance of the airbag cover. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an injection molded part testing device for injection molding quality control proposed in this invention;

[0025] Figure 2 This is a structural assembly diagram of the base, test table, airbag cover plate and projection lamp in an injection molded part testing device for injection quality control proposed in this invention.

[0026] Figure 3 This is a cross-sectional view of the internal structure of an injection molded part testing device for injection molding quality control proposed in this invention;

[0027] Figure 4 This is a schematic diagram of the bottom structure of the test bench in an injection molded part testing device for injection quality control proposed in this invention;

[0028] Figure 5 This is a schematic diagram of the locking mechanism in an injection molded part testing device for injection molding quality control proposed in this invention;

[0029] Figure 6 This is a cross-sectional view of the base and sealing cylinder in an injection molded part testing device for injection molding quality control proposed in this invention;

[0030] Figure 7 This is a cross-sectional view of the fracture testing component in an injection molded part testing device for injection molding quality control proposed in this invention;

[0031] Figure 8 This is a schematic diagram of the airflow impact tube in an injection molded part testing device for injection molding quality control proposed in this invention;

[0032] Figure 9 This is a structural cross-sectional view of the near-end section of the vortex ring generation cavity in the porous liner of an injection molded part testing device for injection quality control proposed in this invention.

[0033] Figure 10 This is a structural cross-sectional view of the distal section of the vortex ring generation cavity in the porous liner of an injection molded part testing device for injection quality control proposed in this invention.

[0034] Figure 11 This is a structural assembly diagram of the scattering test component in an injection molded part testing device for injection molding quality control proposed in this invention;

[0035] Figure 12 This is a cross-sectional view of the fragment interception tower in an injection molded part testing device for injection molding quality control proposed in this invention;

[0036] Figure 13 for Figure 12 Enlarged view of point A in the middle;

[0037] Figure 14 for Figure 12 Enlarged view of point B in the middle;

[0038] Figure 15 This is a structural assembly diagram of the projection lamp in an injection molded part testing device for injection molding quality control proposed in this invention.

[0039] In the diagram: 1. Base; 2. Airbag cover; 3. High-pressure gas cylinder; 4. Test push cylinder; 5. Sealing cylinder; 6. Test platform; 7. Positioning slide; 8. Limiting block; 9. Positioning groove; 10. Projection lamp; 11. Airflow impact pipe; 12. Porous liner; 13. Pressure relief pipe; 14. Pressure sensor; 15. Fixing ring; 16. Pressure relief spring; 17. Sealing plunger; 18. Vortex ring generating cavity; 19. Concentrated jet cavity; 20. Action stabilizing rod; 21. Electromagnetic coil; 22. Locking block; 23. Lifting rod; 24. Guide rod; 25. Hollowed-out top plate; 26. Hollowed-out bottom plate; 27. Secondary top plate; 28. Hollowed-out side plate; 29. ​​Secondary side plate; 30. Interception liner; 31. Patterned light sheet; 32. Light shield. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Example, refer to Figures 1 to 15 A testing device for injection molded parts for injection quality control includes a base 1 and an airbag cover plate 2. The base 1 is provided with a high-pressure gas cylinder 3 and multiple test push cylinders 4. The surface of the base 1 is provided with a sealing cylinder 5. The sealing cylinder 5 is provided with an airflow impact component to simulate the impact of the airbag on the airbag cover plate 2 when the airbag is deployed. The outer wall of the sealing cylinder 5 is provided with a rupture test component for testing the rupture state of the airbag cover plate 2.

[0044] The airflow impact component includes a solenoid valve installed at the output end of the high-pressure gas cylinder 3. An airflow impact tube 11 is fixedly connected to the top of the solenoid valve. A porous liner 12 for generating turbulence is installed inside the airflow impact tube 11 to simulate the nitrogen flow state inside the airbag when it is released.

[0045] The rupture test assembly includes a pressure relief pipe 13 connected to the sealing cylinder 5. The outer wall of the pressure relief pipe 13 has a pressure relief hole. The pressure relief pipe 13 is provided with a pressure sensor 14, a fixing ring 15, a pressure relief spring 16 and a sealing plunger 17 from the inside to the outside.

[0046] A test platform 6 is provided above the base 1. The outer wall of the test platform 6 is provided with a control button for unlocking the airbag cover plate 2. The surface of the test platform 6 is provided with a positioning groove 7 for positioning the fixed frame. The surface of the positioning groove 7 is provided with a limiting block 8. The bottom of the limiting block 8 is provided with a limiting spring. The outer wall of the limiting block 8 is provided with a handle that penetrates the base 1. The operator can release the positioning of the fixed frame by pressing down the handle. The test platform 6 is provided with a through positioning groove 9 for placing the airbag cover plate 2. The positioning groove 9 is provided with a locking mechanism for locking the airbag cover plate 2. The test platform 6 is provided with a fragment scattering test component and a projection lamp 10 for projecting the fracture standard reference line.

[0047] The fragment scattering test assembly includes two longitudinally arranged fixed frames and multiple connecting rods. A fragment interception tower is provided between the fixed frames to detect the fragment scattering state after the airbag cover 2 ruptures.

[0048] Furthermore, the bottom of the porous liner 12 is provided with multiple vortex ring generating cavities 18 for forming high-speed rotating gas vortex rings, and the top of the porous liner 12 is provided with multiple eccentrically arranged energy-concentrating jet cavities 19 for generating eccentric high-speed airflow. The energy-concentrating jet cavities 19 correspond one-to-one with the vortex ring generating cavities 18 and are connected.

[0049] The further advantage of the above is that, under the synergistic effect of the vortex ring generating cavity 18 and the energy-concentrating jet cavity 19, high-pressure nitrogen gas first enters from the inlet (large hole) at the bottom of the vortex ring generating cavity 18. The conical structure of the vortex ring generating cavity 18 guides the airflow to gather towards the center and accelerates its rotation. The accelerated airflow completes energy integration in the cavity and is then ejected at high speed through the outlet (small hole) of the energy-concentrating jet cavity 19. Since the energy-concentrating jet cavity 19 is located off the center of the cavity, the ejected airflow forms a strong velocity difference with the surrounding gas, inducing shear layer instability. This instability effect rapidly tears the ordered airflow into multi-scale vortices, which eventually develop into a highly turbulent flow field in the test area inside the sealed cylinder 5, thus realizing the function of simulating the impact of an explosion.

[0050] Furthermore, a stabilizing rod 20 is fixedly connected to the center of the sealing plunger 17 facing the pressure relief spring 16. The stabilizing rod 20 is slidably connected to the fixed ring 15. When the sealing plunger 17 performs the pressure relief action, the stabilizing rod 20 slides in the fixed ring 15 to ensure the stability of the plunger movement. At the same time, the pressure sensor 14 is triggered by impact.

[0051] The further advantage of adopting the above is that, through the synergistic effect of the action stabilizing bar 20 and the fixed ring 15, the movement trajectory of the sealing plunger 17 is effectively constrained, preventing the sealing plunger 17 from the risk of lateral displacement or jamming under the compression of high-pressure airflow, thus ensuring the reliability of the pressure relief action. At the same time, the action stabilizing bar 20 can trigger the pressure sensor 14 by impact at the moment of pressure relief, realizing the function of testing the rupture performance of the airbag cover 2.

[0052] Furthermore, the locking mechanism includes a locking groove formed on the inner wall of the positioning groove 9 and an electromagnetic coil 21 installed at the bottom of the test bench 6. The electromagnetic coil 21 is electrically connected to the control button to receive the unlocking command. A locking block 22 is slidably connected in the locking groove. One side of the locking block 22 is set as an inclined surface for the airbag cover plate 2 to pass through to achieve compression of the locking block 22. A locking spring is fixedly connected to the other side of the locking block 22. The locking spring is fixedly connected to the inner wall of the locking groove to provide the elastic force required for the locking block 22 to reset. An action groove is provided on the upper surface of the locking block 22 to cooperate with the guide rod 24 to drive the locking block 22 to move. An action frame is provided above the locking block 22. The action frame includes multiple lifting rods 23. The lifting rods 23 are slidably connected to the electromagnetic coil 21 to drive the action frame to rise and fall under the action of the electromagnetic coil 21. A connecting block is fixedly connected to the top of the lifting rod 23. A guide rod 24 is fixedly connected between the connecting blocks to press into the action groove to drive the locking block 22 to unlock when the action frame descends.

[0053] Furthermore, the fragment interception tower includes a hexagonal perforated top plate 25 and a perforated bottom plate 26. The size of the perforated bottom plate 26 matches the fixed frame. A secondary top plate 27 is fixedly connected to the top of the perforated top plate 25 via a support column. Multiple perforated side plates 28 are fixedly connected between the perforated top plate 25 and the perforated bottom plate 26. A secondary side plate 29 is connected to the outer side wall of the perforated side plate 28 via a support column. A foam interception liner 30 is bonded to the inner side wall of the perforated top plate 25, the secondary top plate 27, the perforated side plate 28, and the secondary side plate 29 for capturing fragments. An adhesive layer is provided on the inner side wall of the interception liner 30.

[0054] It should be noted that: such as Figure 13 and Figure 14 As shown, the gaps between the perforated top plate 25 and the secondary top plate 27, and between the perforated side plate 28 and the secondary side plate 29, constitute airflow channels. When high-pressure gas breaks through the airbag cover plate 2 and violently rushes into the fragment interception tower, these gaps provide a pressure relief path, allowing the gas to be discharged. This avoids the formation of a destructive closed high-pressure chamber inside the fragment interception tower, preventing the risk of structural deformation, displacement, or even overturning of the fragment interception tower due to a sudden increase in internal pressure, and ensuring the reliability of the fragment interception tower during the testing process.

[0055] The further advantage of the above approach is that if the airbag cover 2 ruptures and generates fragments, low-energy fragments, upon impacting the inner wall of the intercepting liner 30, are captured and fixed at the impact point by the adhesive layer. Higher-energy fragments, upon impacting the inner wall of the intercepting liner 30, penetrate and embed into the intercepting liner 30, achieving fixation through the combined action of the intercepting liner 30 and the adhesive layer. During this process, the extremely high-energy fragments are intercepted by the combined action of the perforated top plate 25, the secondary top plate 27, the perforated side plate 28, and the secondary side plate 29, preventing the fragments from penetrating the fragment interception tower. This ensures that the embedding position, angle, and distribution of the fragments on the intercepting liner 30 truly reflect the initial moment of rupture, enabling the testing of the number, size, shape, spatial distribution density, and dispersion direction of the fragments.

[0056] Furthermore, the top of the connecting rod is set as a handle, and the bottom of the connecting rod is threaded. The bottom of the connecting rod passes through the fixed frame above, the hollow top plate 25 and the hollow bottom plate 26 and connects to the fixed frame at the bottom to form a cage structure, which is used to fix the fragment interception tower and prevent the fragment interception tower from being overturned by the airflow.

[0057] Furthermore, a switch is provided on the top of the projection lamp 10. Inside the projection lamp 10, from top to bottom, there are a condenser lens, a pattern light sheet 31, and an imaging lens. A light shield 32 is attached to the surface of the pattern light sheet 31, and the light shields 32 form a rectangular gap. When the projection lamp 10 is turned on, the light passes through the condenser lens, the pattern light sheet 31, and the imaging lens, and under the action of the optical imaging principle, a rectangular rupture standard reference line is projected onto the surface of the airbag cover 2. If the rupture size of the airbag cover 2 is smaller than the rupture standard reference line, it indicates that the deployment of the airbag will be hindered in actual use.

[0058] When using this invention, the airbag cover plate 2 to be tested is inserted into the positioning groove 9. When the airbag cover plate 2 is inserted into the positioning groove 9 and presses the locking block 22, the locking block 22 is pushed towards the locking groove and released under the action of the inclined surface. When the slot of the airbag cover plate 2 is aligned with the locking block 22, the locking block 22 is reset under the elastic force of the locking spring and inserted into the slot, so that the airbag cover plate 2 is locked. The fragment interception tower is installed between the fixed frames. After pressing down the handle to make the limiting block 8 descend, the fixed frame is placed on the surface of the positioning groove 7 and slides inward. The longitudinal positioning of the fixed frame is achieved through the positioning groove 7. Then, the handle is released to make the limiting block 8 reset. After the limiting block 8 is reset, it blocks the sliding of the fixed frame by its own shape, so as to achieve lateral positioning.

[0059] During testing, the test cylinder 4 retracts synchronously to pull the test platform 6 down until the sealing cylinder 5 presses against the airbag cover plate 2 from below. Then, the solenoid valve opens, causing the compressed nitrogen in the high-pressure gas cylinder 3 to be released instantly. When the high-pressure nitrogen enters the airflow impact pipe 11, it first passes through the vortex ring generating chamber 18. The conical structure of the vortex ring generating chamber 18 guides the airflow to gather towards the center and accelerates its rotation. The accelerated airflow completes energy integration in the chamber and is then ejected at high speed through the energy jet chamber 19. Because the energy jet chamber 19 is off-center from the center of the chamber, the ejected airflow forms a strong velocity difference with the surrounding gas, inducing shear layer instability. This instability effect rapidly tears the orderly airflow into multi-scale vortices, which eventually develop into a highly turbulent field in the test area inside the sealing cylinder 5, thereby simulating the turbulence generated when the airbag explodes. The high-pressure nitrogen turbulence impacts the airbag cover plate 2 to simulate the actual airbag ejection scenario.

[0060] If the airbag cover 2 fails to break after being impacted, the pressure inside the sealing cylinder 5 will rapidly increase with the injection of nitrogen. When the pressure inside the sealing cylinder 5 exceeds the threshold of the pressure relief spring 16, the air pressure will push the sealing plunger 17 to slide outward in the pressure relief pipe 13. When the sealing plunger 17 slides, it will drive the action stabilizing rod 20 to slide in the fixed ring 15. The action stabilizing rod 20 will be used to ensure the stability of the movement of the sealing plunger 17 until the pressure relief hole is exposed. At the moment of pressure relief, the pressure sensor 14 will be triggered by the impact. If the pressure sensor 14 is triggered, it indicates that the airbag cover 2 cannot break normally, thus realizing the function of testing the breaking performance of the airbag cover 2.

[0061] If the airbag cover 2 generates fragments during the rupture process, low-energy fragments are captured and fixed at the impact point by the adhesive layer when they impact the inner wall of the intercepting liner 30. High-energy fragments penetrate and embed into the intercepting liner 30 when they impact the inner wall of the intercepting liner 30, and are fixed by the combined action of the intercepting liner 30 and the adhesive layer. During this process, the high-energy fragments are intercepted by the combined action of the hollow top plate 25, the secondary top plate 27, the hollow side plate 28 and the secondary side plate 29, preventing the fragments from penetrating the fragment interception tower. This ensures that the embedding position, angle and distribution of the fragments on the intercepting liner 30 truly reflect the initial moment of rupture, and realizes the function of testing the number, size, shape, spatial distribution density and dispersion direction of the fragments.

[0062] Next, the staff took out the fixing frame and turned on the projector lamp 10. After the lamp was turned on, a rectangular rupture standard reference line was projected onto the surface of the airbag cover 2 through the optical imaging principle. The staff judged the rupture size of the airbag cover 2. If the rupture size of the airbag cover 2 was smaller than the rupture standard reference line, it indicated that the deployment of the airbag would be obstructed in actual use.

[0063] After the test is completed, the staff presses the control button to turn on the electromagnetic coil 21. After the electromagnetic coil 21 is energized, it uses magnetic force to pull the lifting rod 23 to drive the action frame to descend. When the action frame descends, it squeezes the action groove through the guide rod 24. The shape of the action groove causes the locking block 22 to slide into the locking groove and release the lock. After the airbag cover 2 is removed, the control button is pressed again to de-energize the electromagnetic coil 21. At this time, the locking block 22 is reset under the elastic force of the locking spring.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A testing device for injection molded parts for injection molding quality control, comprising a base (1) and an airbag cover (2), characterized in that, The base (1) is provided with a high-pressure gas cylinder (3) and multiple test push cylinders (4). The base (1) is provided with a sealing cylinder (5). The sealing cylinder (5) is provided with an airflow impact component. The outer wall of the sealing cylinder (5) is provided with a rupture test component. The base (1) is provided with a test platform (6). The outer wall of the test platform (6) is provided with a control button. The test platform (6) is provided with a positioning groove (7). The surface of the positioning groove (7) is provided with a limiting block (8). The bottom of the limiting block (8) is provided with a limiting spring. The outer wall of the limiting block (8) is provided with a handle that penetrates the base (1). The test platform (6) is provided with a positioning groove (9). The positioning groove (9) is provided with a locking mechanism. The test platform (6) is provided with a fragment scattering test component and a projection lamp (10) above it. The airflow impact assembly includes a solenoid valve installed at the output end of the high-pressure gas cylinder (3). The top of the solenoid valve is fixedly connected to an airflow impact pipe (11). A porous liner (12) for generating turbulence is installed inside the airflow impact pipe (11). Multiple vortex ring generating cavities (18) are opened at the bottom of the porous liner (12). Multiple eccentrically arranged energy-concentrating jet cavities (19) are opened at the top of the porous liner (12). The energy-concentrating jet cavities (19) correspond one-to-one with the vortex ring generating cavities (18) and are connected. The rupture test assembly includes a pressure relief pipe (13) connected to the sealing cylinder (5). The outer wall of the pressure relief pipe (13) is provided with a pressure relief hole. The pressure relief pipe (13) is provided with a pressure sensor (14), a fixing ring (15), a pressure relief spring (16) and a sealing plunger (17) in sequence from the inside to the outside. The fragment scattering test assembly includes two longitudinally arranged fixed frames and multiple connecting rods, with a fragment interception tower between the fixed frames for intercepting and collecting fragments; The fragment interception tower includes a hexagonal perforated top plate (25) and a perforated bottom plate (26). A secondary top plate (27) is fixedly connected above the perforated top plate (25) by a support column. Multiple perforated side plates (28) are fixedly connected between the perforated top plate (25) and the perforated bottom plate (26). A secondary side plate (29) is connected to the outer side wall of the perforated side plate (28) by a support column. An interception liner (30) for capturing fragments is bonded to the inner side wall of the perforated top plate (25), the secondary top plate (27), the perforated side plate (28), and the secondary side plate (29). An adhesive layer is provided on the inner side wall of the interception liner (30).

2. The injection molding part testing device for injection molding quality control according to claim 1, characterized in that, The sealing plunger (17) is fixedly connected to the center of the side facing the pressure relief spring (16) with an action stabilizing rod (20), and the action stabilizing rod (20) is slidably connected to the fixing ring (15).

3. The injection molding part testing device for injection molding quality control according to claim 1, characterized in that, The locking mechanism includes a locking groove formed on the inner wall of the positioning groove (9) and an electromagnetic coil (21) installed at the bottom of the test bench (6). The electromagnetic coil (21) is electrically connected to the control button. A locking block (22) is slidably connected in the locking groove. One side of the locking block (22) is set as an inclined surface for the airbag cover plate (2) to pass through. A locking spring is fixedly connected to the other side of the locking block (22). The locking spring is fixedly connected to the inner wall of the locking groove. An action groove is provided on the upper surface of the locking block (22). An action frame is provided above the locking block (22).

4. The injection molding part testing device for injection molding quality control according to claim 3, characterized in that, The motion frame includes multiple lifting rods (23), which are slidably connected to an electromagnetic coil (21). A connecting block is fixedly connected to the top of the lifting rod (23), and a guide rod (24) is fixedly connected between the connecting blocks.

5. The injection molding part testing device for injection molding quality control according to claim 1, characterized in that, The top of the connecting rod is a grip, the bottom of the connecting rod is threaded, and the bottom of the connecting rod passes through the fixed frame above, the hollow top plate (25) and the hollow bottom plate (26) and is connected to the fixed frame at the bottom.

6. The injection molding part testing device for injection molding quality control according to claim 1, characterized in that, The top of the projection lamp (10) is equipped with a switch, and the projection lamp (10) is provided with a patterned light sheet (31). A light-shielding sheet (32) is attached to the surface of the patterned light sheet (31), and a rectangular gap is formed between the light-shielding sheets (32).

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