Strength testing machine for injection-molded tables and chairs

Abstract

The invention discloses an injection molding table and chair strength testing machine, and relates to the technical field of injection molding part detection equipment. The device comprises a supporting frame, a base is fixedly connected to the bottom of the supporting frame, a detection table is installed on the top of the base, and a first hydraulic cylinder and a second hydraulic cylinder are arranged on the top of the detection table; and a detection assembly is arranged at the top of the detection table. The detection assembly, the adjusting assembly and the traction assembly are arranged, a first hydraulic cylinder and a second hydraulic cylinder drive a moving disc and a pressing block to apply pressure to the seat, the back and the legs of the injection-molded table and chair, and a pressure sensor is matched to feed back a pressed value in real time, so that accurate strength detection of different parts is realized; the adjusting assembly can flexibly adjust the pressing angle of the pressing block through cooperation of a rotating shaft, a rotating frame and a third hydraulic cylinder, and the traction assembly drives a first toothed plate and a first gear through a fourth hydraulic cylinder, so that a clamping plate relatively rotates to clamp the chair surface and cooperates with retraction of a second hydraulic cylinder to carry out tensile strength detection, and the accuracy of detection data is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of injection molded parts testing equipment, and in particular relates to an injection molded table and chair strength testing machine. Background Technology

[0002] Injection molded parts are plastic products manufactured through an injection molding process. This process involves injecting molten plastic material into a mold cavity under high pressure, which then cools and solidifies to obtain the desired shape. Injection molded parts are characterized by high precision, high production efficiency, and a smooth surface finish, enabling the mass production of complex structures. Common injection molding materials include thermoplastics such as ABS, PP, PC, and nylon. These products are widely used in daily life and industrial fields, such as electronic device housings, automotive parts, medical devices, and household appliance accessories. Injection molded part strength testing is a series of standardized tests used to evaluate the mechanical properties of plastic products, verifying whether they meet design and usage requirements.

[0003] A Chinese patent with authorization announcement number CN214844443U discloses an injection molded part strength testing machine, including a machine body. Electric push rods are fixedly connected to both sides of the inner wall of the machine body. A connecting rod is fixedly connected to one side of the electric push rod. A slide rail is fixedly connected to one side of the connecting rod. A slider is fixedly connected to one side of the slide rail. A slide groove is formed on the top of the inner cavity sidewall of the machine body. The two ends of the slide rail are slidably connected to the inside of the slide groove through the slider.

[0004] However, the above-mentioned device still has the following problems during implementation: During the testing of injection molded parts, an extrusion block is driven by an extrusion rod to press against the injection molded part for strength testing. Because the bottom of the injection molded part is completely in contact with the fixing plate during testing, some of the pressure is absorbed by the fixing plate, resulting in a reduction in the actual load acting on the injection molded part. This not only reduces the accuracy of the test but also makes it difficult to accurately reflect the deformation characteristics of the injection molded part under stress at different angles. This fixing method limits the simulation testing of multi-angle pressure changes and cannot comprehensively evaluate the mechanical properties of the injection molded part under actual working conditions.

[0005] To address this issue, we provide an injection molding table and chair strength testing machine. Summary of the Invention

[0006] The purpose of this invention is to provide a strength testing machine for injection-molded tables and chairs. Through the structural cooperation of the detection component, adjustment component, and tension component, it solves the problem of existing injection-molded part testing equipment. In this equipment, the extrusion rod drives the extrusion block to press against the injection-molded part for strength testing. However, when the injection-molded part is extruded, the bottom of the injection-molded part is attached to the fixing plate, which results in a large amount of pressure not being applied to the injection-molded part. This makes it impossible to test the pressure changes of the injection-molded part at different angles, and the testing has limitations.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a strength testing machine for injection-molded tables and chairs, comprising a support frame, a base fixedly connected to the bottom of the support frame, a testing platform mounted on the top of the base, and a first hydraulic cylinder and a second hydraulic cylinder mounted on the top of the testing platform. A testing assembly is also mounted on the top of the testing platform, comprising a movable disk mounted on the output ends of the first and second hydraulic cylinders, a fixed shell slidably connected to the surface of the movable disk, a pressure block mounted on one side of the fixed shell, and pressure sensors mounted on both sides of the movable disk. The testing assembly detects the compressive strength of the injection-molded chair. An adjustment assembly is also mounted on the top of the testing platform, comprising a rotating shaft movably connected inside the support frame, and mounting... A rotating frame is mounted on the surface of the rotating shaft. A third hydraulic cylinder is movably connected to the bottom of the rotating frame. A drive housing is mounted on one side of the rotating frame. A drive motor is mounted inside the drive housing. A drive rod is mounted on the output end of the drive motor. A moving block is threadedly connected to the surface of the drive rod. The injection-molded chair is subjected to multi-angle testing through the adjustment assembly. A traction assembly is provided inside the pressure block. The traction assembly includes a fourth hydraulic cylinder mounted inside the pressure block, a first toothed plate mounted on the output end of the fourth hydraulic cylinder, a first gear meshing with the top and bottom of the first toothed plate, a connecting shaft mounted at the axis of the first gear, and a clamping plate mounted on the surface of the connecting shaft. The injection-molded chair is subjected to tensile strength testing through the traction assembly.

[0009] The present invention is further configured such that a driving assembly is provided on the top of the detection platform, the driving assembly including a servo motor mounted on the top of the support frame, a second gear mounted on the output end of the servo motor, and a third gear mounted on the surface of the rotating shaft.

[0010] The invention is further configured such that one side of the second gear meshes with the third gear, and the surface of the rotating shaft is movably connected to the inner wall of the support frame through a first bearing.

[0011] The invention is further configured such that the top of the first hydraulic cylinder is movably connected to the rotating frame, the output end of the third hydraulic cylinder is movably connected to the first hydraulic cylinder through a movable seat, and one side of the moving block penetrates the drive housing and is fixedly connected to the second hydraulic cylinder.

[0012] The invention is further configured such that an anti-slip groove is provided on one side of the clamping plate, and the surface of the connecting shaft is movably connected to the inner wall of the pressure block through a second bearing.

[0013] The invention is further configured such that the adjustment assembly includes a heater installed inside the support frame and a temperature sensor installed on the top of the base.

[0014] The invention is further configured such that a circular groove is provided on the top of the detection platform, and a guide block is slidably connected inside the circular groove, with one side of the guide block being fixedly connected to the drive housing.

[0015] The present invention is further configured such that a positioning seat is fixedly connected to the top of the detection platform, two sets of connecting shafts are movably connected inside the positioning seat, a fourth gear is installed on the surface of the connecting shaft, a second tooth plate is meshed on both sides of the fourth gear, a connecting plate is fixedly connected to the opposite side of the two sets of second tooth plates, a moving rod is fixedly connected to the other side of the connecting plate, and the other end of the moving rod passes through the positioning seat and is fixedly connected to a pressure plate.

[0016] The invention is further configured such that a fifth hydraulic cylinder is fixedly connected inside the positioning seat, and the output end of the fifth hydraulic cylinder is fixedly connected to the connecting plate.

[0017] The invention is further configured such that positioning grooves are provided on both sides of the positioning seat for limiting the four legs of the injection-molded chair.

[0018] The present invention has the following beneficial effects: By setting up a detection component, an adjustment component, and a traction component, the present invention applies pressure to the seat surface, backrest, and legs of the injection-molded table and chair by driving a moving plate and a pressure block through a first hydraulic cylinder and a second hydraulic cylinder. With the help of a pressure sensor, the pressure value is fed back in real time, realizing accurate strength detection of different parts. The adjustment component can flexibly adjust the pressure angle of the pressure block through the cooperation of a rotating shaft, a rotating frame, and a third hydraulic cylinder. The drive motor drives the moving block to move horizontally, realizing comprehensive detection at multiple positions and angles, avoiding detection limitations. The traction component drives a first toothed plate and a first gear through a fourth hydraulic cylinder, so that the clamping plate rotates relative to clamp the seat surface. With the help of the second hydraulic cylinder, tensile strength detection is performed, which significantly improves the accuracy of the detection data.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a three-dimensional view of an injection molding table and chair strength testing machine.

[0022] Figure 2 This is a cross-sectional view of the testing table in an injection molding table and chair strength testing machine.

[0023] Figure 3 This is a schematic diagram of the surface structure of the rotating frame in an injection molding table and chair strength testing machine.

[0024] Figure 4This is a cross-sectional view of the drive housing in an injection molding table and chair strength testing machine.

[0025] Figure 5 This is a schematic diagram showing the connection between the fixed shell, the pressure block, and the second hydraulic cylinder in an injection molding table and chair strength testing machine.

[0026] Figure 6 This is a cross-sectional view of the pressure block in an injection molding table and chair strength testing machine.

[0027] Figure 7 This is a cross-sectional view of the fixed shell in an injection molding table and chair strength testing machine.

[0028] Figure 8 This is a schematic diagram of the rotation of the clamping plate in an injection molding table and chair strength testing machine.

[0029] Figure 9 This is a cross-sectional view of the positioning seat in an injection molding table and chair strength testing machine.

[0030] Figure 10 This is a three-dimensional view of the support frame in an injection molding table and chair strength testing machine.

[0031] In the attached diagram: 1. Support frame; 2. Base; 3. Testing table; 4. First hydraulic cylinder; 5. Second hydraulic cylinder; 6. Testing assembly; 601. Moving plate; 602. Fixed housing; 603. Pressure block; 604. Pressure sensor; 7. Adjustment assembly; 701. Rotating shaft; 702. Rotating frame; 703. Third hydraulic cylinder; 704. Drive housing; 705. Drive motor; 706. Drive rod; 707. Moving block; 8. Pulling assembly; 801. Fourth hydraulic cylinder; 802. 803. First gear; 804. Connecting shaft; 805. Clamping plate; 9. Drive assembly; 901. Servo motor; 902. Second gear; 903. Third gear; 708. Heater; 709. Temperature sensor; 10. Circular groove; 11. Guide block; 12. Positioning seat; 13. Connecting shaft; 14. Fourth gear; 15. Second gear; 16. Connecting plate; 17. Moving rod; 18. Pressure plate; 19. Fifth hydraulic cylinder; 20. Positioning groove. Detailed Implementation

[0032] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Please refer to Example 1 Figures 1-10This invention relates to a strength testing machine for injection-molded tables and chairs, comprising a support frame 1, a base 2 fixedly connected to the bottom of the support frame 1, a testing platform 3 mounted on the top of the base 2, a first hydraulic cylinder 4 and a second hydraulic cylinder 5 mounted on the top of the testing platform 3; a testing assembly 6 mounted on the top of the testing platform 3, comprising a movable disk 601 mounted on the output end of the first hydraulic cylinder 4 and the second hydraulic cylinder 5, a fixed shell 602 slidably connected to the surface of the movable disk 601, a pressure block 603 mounted on one side of the fixed shell 602, and pressure sensors 604 mounted on both sides of the movable disk 601, wherein the compressive strength of the injection-molded chair is tested by the testing assembly 6; an adjustment assembly 7 mounted on the top of the testing platform 3, comprising a rotating shaft 701 movably connected inside the support frame 1, a rotating frame 702 mounted on the surface of the rotating shaft 701, and a movably connected... A third hydraulic cylinder 703 is located at the bottom of the rotating frame 702, a drive housing 704 is installed on one side of the rotating frame 702, a drive motor 705 is installed inside the drive housing 704, a drive rod 706 is installed at the output end of the drive motor 705, and a moving block 707 is threadedly connected to the surface of the drive rod 706. The adjustment assembly 7 performs multi-angle testing on the injection-molded chair. A traction assembly 8 is provided inside the pressure block 603. The traction assembly 8 includes a fourth hydraulic cylinder 801 installed inside the pressure block 603, a first toothed plate 802 installed at the output end of the fourth hydraulic cylinder 801, a first gear 803 meshing with the top and bottom of the first toothed plate 802, a connecting shaft 804 installed at the axis of the first gear 803, and a clamping plate 805 installed on the surface of the connecting shaft 804. The traction assembly 8 performs tensile strength testing on the injection-molded chair.

[0034] Specifically: The first hydraulic cylinder 4 and the second hydraulic cylinder 5 are located on the top of the testing platform 3, serving as the power source for the testing action. By precisely controlling the extension and retraction stroke, pressure testing is applied to different parts of the injection-molded table and chair. The fixed housing 602 is slidably connected to the surface of the moving plate 601, supporting the pressure block 603 and allowing it to adaptively adjust its position during testing, ensuring good contact between the pressure block 603 and the surface being tested. The pressure block 603 is installed on one side of the fixed housing 602, serving as a pressure element that directly contacts the injection-molded table and chair, simulating the stress conditions in actual use, and applying testing pressure to parts such as the seat, backrest, and legs of the table and chair. Pressure sensors 604 are installed on both sides of the moving plate 601, used to collect real-time data on the reaction force generated by the pressure block 603 during the pressure application process. The force data provides accurate quantitative basis for assessing the compressive strength of injection-molded tables and chairs. The rotating shaft 701 is movably connected inside the support frame 1, serving as the rotation core of the adjustment component 7. It supports the rotating frame 702 and allows for free adjustment of the entire testing angle. The rotating frame 702 is mounted on the surface of the rotating shaft 701, supporting the first hydraulic cylinder 4, the second hydraulic cylinder 5, and other related components. The testing angle changes by rotating with the rotating shaft 701. The third hydraulic cylinder 703 is movably connected to the bottom of the rotating frame 702, driving the first hydraulic cylinder 4 to tilt and adjust the pressure angle of the pressure block 603, thus enabling force testing of the injection-molded tables and chairs at different tilt angles. The drive housing 704 is mounted on one side of the rotating frame 702, housing and protecting the drive motor 705. Other transmission components ensure stable operation during multi-angle detection. The drive motor 705, installed inside the drive housing 704, provides precise power for horizontal position adjustment. Precise movement of the detection position is achieved by controlling the output speed and angle. The drive rod 706, installed at the output end of the drive motor 705, converts the motor's rotational motion into the power required for threaded transmission, driving the moving block 707 to precisely displace along the axial direction. The moving block 707 is threadedly connected to the surface of the drive rod 706, driving the second hydraulic cylinder 5 and its connected pressure block 603 to move vertically, achieving precise positioning of different detection points on the injection-molded table and chair. The fourth hydraulic cylinder 801, installed inside the pressure block 603, serves as the power source for the pulling assembly 8, driving... The clamping mechanism grips and stretches the injection-molded table and chair parts. The first toothed plate 802 is installed at the output end of the fourth hydraulic cylinder 801, driving the synchronous opening and closing action of the clamping plate 805. The first gear 803 meshes with the top and bottom of the first toothed plate 802, and is used to convert the linear motion of the first toothed plate 802 into the reverse rotational motion, so as to realize the synchronous opposite movement of the clamping plates 805 on both sides. The connecting shaft 804 is installed at the axis of the first gear 803, and is used to transmit the rotational motion of the first gear 803 to the clamping plate 805, ensuring that the clamping plate 805 can rotate synchronously with the gear. The clamping plate 805 is installed on the surface of the connecting shaft 804, and is used to firmly clamp specific parts of the injection-molded table and chair during the tensile testing process, providing a reliable fixed point for the tensile strength test.

[0035] Please refer to Example 2 Figures 1-10 Based on Embodiment 1, a drive assembly 9 is provided on the top of the testing platform 3. The drive assembly 9 includes a servo motor 901 mounted on the top of the support frame 1, a second gear 902 mounted on the output end of the servo motor 901, and a third gear 903 mounted on the surface of the rotating shaft 701. One side of the second gear 902 meshes with the third gear 903. The surface of the rotating shaft 701 is movably connected to the inner wall of the support frame 1 through a first bearing. The top of the first hydraulic cylinder 4 is movably connected to the rotating frame 702. The output end of the third hydraulic cylinder 703 is movably connected to the first hydraulic cylinder 4 through a movable seat. One side of the moving block 707 passes through the drive housing 704 and is fixedly connected to the second hydraulic cylinder 5. An anti-slip groove is provided on one side of the clamping plate 805. The surface of the connecting shaft 804 is movably connected to the inner wall of the pressure block 603 through a second bearing.

[0036] Specifically: Servo motor 901 is mounted on the top of support frame 1 and serves as the power source for drive assembly 9. It controls the rotation angle of rotating shaft 701 to achieve precise adjustment of the detection angle. Second gear 902 is mounted on the output end of servo motor 901 and is used to transmit the rotational power of servo motor 901 to third gear 903 to achieve smooth power transmission. Third gear 903 is mounted on the surface of rotating shaft 701 and meshes with second gear 902. It receives the power transmitted by servo motor 901 and drives rotating shaft 701 to rotate, thereby achieving precise adjustment of the detection angle.

[0037] Please refer to Example 3 Figures 1-10 Based on Embodiments 1 and 2, the adjustment assembly 7 further includes a heater 708 installed inside the support frame 1, a temperature sensor 709 installed on the top of the base 2, a circular groove 10 on the top of the detection platform 3, a guide block 11 slidably connected inside the circular groove 10, one side of the guide block 11 being fixedly connected to the drive housing 704, a positioning seat 12 fixedly connected to the top of the detection platform 3, two sets of connecting shafts 13 movably connected inside the positioning seat 12, a fourth gear 14 mounted on the surface of the connecting shaft 13, second tooth plates 15 meshing on both sides of the fourth gear 14, a connecting plate 16 fixedly connected to the opposite side of the two sets of second tooth plates 15, a moving rod 17 fixedly connected to the other side of the connecting plate 16, the other end of the moving rod 17 passing through the positioning seat 12 and fixedly connected to a pressure plate 18, a fifth hydraulic cylinder 19 fixedly connected inside the positioning seat 12, the output end of the fifth hydraulic cylinder 19 being fixedly connected to the connecting plate 16, and positioning grooves 20 on both sides of the positioning seat 12 for limiting the four legs of the injection-molded chair.

[0038] Specifically: A heater 708 is installed inside the support frame 1 to simulate high-temperature operating conditions and evaluate the strength performance changes of injection-molded tables and chairs at different temperatures. A temperature sensor 709 is installed on the top of the base 2 to monitor temperature changes in the detection area in real time, providing accurate feedback data for environmental simulation control. A circular groove 10 is formed on the top of the detection platform 3 to accommodate and guide the sliding of the guide block 11, ensuring the trajectory accuracy of the drive housing 704 and related components during movement. The guide block 11 is slidably connected inside the circular groove 10 and fixedly connected to the drive housing 704 to limit the movement path of the drive housing 704 and ensure its smooth movement along a predetermined trajectory. A positioning seat 12 is fixedly connected to the top of the detection platform 3 to accommodate and support the table and chair positioning mechanism. A fourth gear 14 is installed on the surface of the connecting shaft 13 to transmit power to the second gear plates 15 on both sides, achieving synchronous control of the clamping action. The second gear plates 15 mesh with both sides of the fourth gear 14 to engage the fourth gear 14. The rotational motion of the fourth cylinder is converted into linear motion, driving the pressure plate 18 to move closer to or away from the injection-molded table and chair. The connecting plate 16 is fixedly connected to one side of the second toothed plate 15, which is used to transmit the motion of the second toothed plate 15 to the moving rod 17 to achieve smooth power transmission. One end of the moving rod 17 is fixedly connected to the connecting plate 16, and the other end passes through the positioning seat 12 and is fixedly connected to the pressure plate 18, which is used to transmit the clamping force to the pressure plate 18 to achieve reliable fixation of the injection-molded table and chair. The pressure plate 18 is installed at the end of the moving rod 17 to clamp and position the injection-molded table and chair before testing, preventing displacement during the pressure process and ensuring the accuracy of the test data. The fifth hydraulic cylinder 19 is fixedly connected inside the positioning seat 12, and its output end is fixedly connected to the connecting plate 16. As the power source of the clamping mechanism, it is used to drive the pressure plate 18 to automatically complete the fixation of the injection-molded table and chair. The positioning groove 20 is opened on both sides of the positioning seat 12 to accommodate the four chair legs of the injection-molded table and chair, realizing rapid pre-positioning before testing and improving testing efficiency and positioning accuracy.

[0039] The working principle of this invention is as follows: The operator moves the injection-molded chair to be inspected to the top of the inspection table 3, so that the four chair legs at the bottom of the injection-molded chair are respectively inserted into the four positioning slots 20. Then, the fifth hydraulic cylinder 19 is activated by the external controller. The fifth hydraulic cylinder 19 pushes the connecting plate 16 to move. The connecting plate 16 drives the second toothed plate 15 to move. The second toothed plate 15 drives the fourth gear 14 to rotate. At the same time, the rotation of the fourth gear 14 drives the two sets of second toothed plates 15 to move relative to each other. The second toothed plate 15, in conjunction with the connecting plate 16, drives the moving rod 17 to move. The moving rod 17 drives the pressure plate 18 to move. The pressure plate 18 fixes the injection-molded chair legs, improving the stability during inspection.

[0040] Then, the first hydraulic cylinder 4 is activated, which pushes the fixed shell 602 and the pressure block 603 to move. The pressure block 603 presses against the seat surface of the injection-molded chair and applies continuous pressure. The pressure sensor 604 provides feedback on the pressure value of the seat surface, enabling the pressure strength test of the seat surface. After the seat surface test is completed, the third hydraulic cylinder 703 is activated, which pushes the first hydraulic cylinder 4 to tilt, so that the pressure block 603 is aligned with the back of the injection-molded chair. At the same time, the first hydraulic cylinder 4 is activated again, which drives the pressure block 603 to press against the back of the injection-molded chair, enabling the pressure strength test of the back of the chair.

[0041] Then, the second hydraulic cylinder 5 is activated, which pushes the fixed shell 602 and the pressure block 603 to move, so that the pressure block 603 presses against the chair leg of the injection-molded chair. The pressure sensor 604 feeds back the pressure value of the chair leg, which can detect the pressure strength of the chair leg and improve the accuracy of the detection value. Then, the drive motor 705 is activated, which, together with the drive rod 706, drives the moving block 707 to move. The moving block 707, together with the second hydraulic cylinder 5, drives the pressure block 603 to move, thereby adjusting the detection height of the chair leg of the injection-molded chair and further improving the accuracy of the detection value.

[0042] Then, the servo motor 901 is started. The servo motor 901, together with the second gear 902, drives the third gear 903 to rotate. The third gear 903, together with the rotating shaft 701, drives the rotating frame 702 and the drive housing 704 to rotate. The drive housing 704 drives the second hydraulic cylinder 5 and the pressure block 603 to rotate, so as to perform multi-angle extrusion strength testing on the injection molding chair.

[0043] After the extrusion strength test is completed, the second hydraulic cylinder 5 is controlled to drive the pressure block 603 to contact the side of the injection-molded chair surface. Then, the fourth hydraulic cylinder 801 is activated, which pushes the first toothed plate 802 to move. The first toothed plate 802 drives the two sets of first gears 803 to rotate relative to each other. The first gears 803, in conjunction with the connecting shaft 804, drive the clamping plate 805 to rotate. The chair surface is clamped by the clamping plate 805. Then, the second hydraulic cylinder 5 is controlled to retract, which enables the tensile strength test of the chair surface and further improves the accuracy of the test data.

[0044] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A strength testing machine for injection-molded tables and chairs, comprising a support frame (1), characterized in that: The support frame (1) is fixedly connected to a base (2) at the bottom, and a testing platform (3) is installed on the top of the base (2). A first hydraulic cylinder (4) and a second hydraulic cylinder (5) are provided on the top of the testing platform (3). The top of the testing platform (3) is provided with a testing component (6). The testing component (6) includes a movable disk (601) installed at the output end of the first hydraulic cylinder (4) and the second hydraulic cylinder (5), a fixed shell (602) slidably connected to the surface of the movable disk (601), a pressure block (603) installed on one side of the fixed shell (602), and pressure sensors (604) installed on both sides of the movable disk (601). The pressure strength of the injection molding chair is tested through the testing component (6). The top of the testing platform (3) is provided with an adjustment component (7). The adjustment component (7) includes a rotating shaft (701) movably connected to the inside of the support frame (1), a rotating frame (702) installed on the surface of the rotating shaft (701), a third hydraulic cylinder (703) movably connected to the bottom of the rotating frame (702), a drive housing (704) installed on one side of the rotating frame (702), a drive motor (705) installed inside the drive housing (704), a drive rod (706) installed at the output end of the drive motor (705), and a moving block (707) threadedly connected to the surface of the drive rod (706). The injection molding chair is tested from multiple angles through the adjustment component (7). The pressure block (603) is provided with a traction assembly (8). The traction assembly (8) includes a fourth hydraulic cylinder (801) installed inside the pressure block (603), a first toothed plate (802) installed at the output end of the fourth hydraulic cylinder (801), a first gear (803) meshing with the top and bottom of the first toothed plate (802), a connecting shaft (804) installed at the shaft center of the first gear (803), and a clamping plate (805) installed on the surface of the connecting shaft (804). The tensile strength of the injection molding chair is tested by the traction assembly (8).

2. The strength testing machine for injection-molded tables and chairs according to claim 1, characterized in that: The top of the testing platform (3) is provided with a drive assembly (9), which includes a servo motor (901) installed on the top of the support frame (1), a second gear (902) installed on the output end of the servo motor (901), and a third gear (903) installed on the surface of the rotating shaft (701).

3. The strength testing machine for injection-molded tables and chairs according to claim 2, characterized in that: The second gear (902) meshes with the third gear (903) on one side, and the surface of the rotating shaft (701) is movably connected to the inner wall of the support frame (1) through the first bearing.

4. The strength testing machine for injection-molded tables and chairs according to claim 1, characterized in that: The top of the first hydraulic cylinder (4) is movably connected to the rotating frame (702), the output end of the third hydraulic cylinder (703) is movably connected to the first hydraulic cylinder (4) through the movable seat, and one side of the moving block (707) passes through the drive housing (704) and is fixedly connected to the second hydraulic cylinder (5).

5. The strength testing machine for injection-molded tables and chairs according to claim 1, characterized in that: The clamping plate (805) has an anti-slip groove on one side, and the surface of the connecting shaft (804) is movably connected to the inner wall of the pressure block (603) through a second bearing.

6. The strength testing machine for injection-molded tables and chairs according to claim 1, characterized in that: The adjustment assembly (7) also includes a heater (708) installed inside the support frame (1) and a temperature sensor (709) installed on the top of the base (2).

7. The strength testing machine for injection-molded tables and chairs according to claim 1, characterized in that: The top of the testing platform (3) is provided with a circular groove (10), and a guide block (11) is slidably connected inside the circular groove (10). One side of the guide block (11) is fixedly connected to the drive housing (704).

8. The strength testing machine for injection-molded tables and chairs according to claim 1, characterized in that: The top of the testing platform (3) is fixedly connected to a positioning seat (12). The positioning seat (12) is movably connected to two sets of connecting shafts (13). A fourth gear (14) is installed on the surface of the connecting shaft (13). The fourth gear (14) is meshed with a second tooth plate (15) on both sides. A connecting plate (16) is fixedly connected to the opposite side of the two sets of second tooth plates (15). A moving rod (17) is fixedly connected to the other side of the connecting plate (16). The other end of the moving rod (17) passes through the positioning seat (12) and is fixedly connected to a pressure plate (18).

9. The strength testing machine for injection-molded tables and chairs according to claim 8, characterized in that: The fifth hydraulic cylinder (19) is fixedly connected inside the positioning seat (12), and the output end of the fifth hydraulic cylinder (19) is fixedly connected to the connecting plate (16).

10. A strength testing machine for injection-molded tables and chairs according to claim 8, characterized in that: The positioning seat (12) has positioning grooves (20) on both sides for limiting the four legs of the injection-molded chair.

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