A refrigerator injection molding part strength detection device

Abstract

The application discloses a refrigerator injection molding part strength detection device and relates to the technical field of injection molding part detection equipment.The application comprises a detection shell, the bottom of the detection shell is fixedly connected with a bottom plate, the top of the bottom plate is provided with a moving column, the inside of the moving column is slidably connected with a cross bar, and the other end of the cross bar is fixedly connected with a disc.The application realizes stable clamping of both ends of the refrigerator injection molding part through a fixing assembly, ensures that displacement is not generated in the testing process, drives the moving column and the cross bar to move through a driving assembly, cooperates with a first pressure sensor to accurately measure tensile strength, simulates the torsional load in actual use through the gear and rack and the push plate structure in the twisting assembly, effectively evaluates the anti-twisting performance of the injection molding part, meanwhile, an environment simulation assembly is integrated with a heating, refrigeration and circulating ventilation system, strength testing can be carried out under different temperature conditions, the actual working environment of the refrigerator is comprehensively simulated, and the accuracy and practicality of the detection are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the technical field of injection molded part testing equipment, and in particular relates to a strength testing device for refrigerator injection molded parts. Background Technology

[0002] Refrigerator injection-molded sheet metal is a core plastic component in refrigerator manufacturing. Made from engineering plastics such as ABS, HIPS, and PP, it is formed through injection molding. It boasts advantages such as lightweight, impact resistance, good insulation, and ease of shaping, allowing for the precise creation of complex structures like door liners, drawers, and shelves. The surface is often coated with a matte or textured layer, balancing aesthetics and scratch resistance; some models incorporate antibacterial components to enhance hygiene. Adapting to the different temperature zones within the refrigerator (such as low-temperature resistance in the freezer and moisture protection in the refrigerator compartment), it simplifies the assembly process and enhances storage efficiency through optimized design. It is a key material for achieving a balance between function and aesthetics in modern refrigerators. Strength testing of refrigerator injection-molded sheet metal is crucial for ensuring product durability, primarily focusing on components such as door liners and drawers, evaluating their impact resistance, compression resistance, bending resistance, and fatigue resistance.

[0003] A Chinese patent application (or patent) with publication number CN223565441U discloses a strength testing device for injection molded parts, including a testing box. A fixed plate is fixedly installed on the right side inside the testing box, and a movable plate is slidably connected to the left side inside the testing box. A drive motor is provided on the opposite sides of the fixed plate and the movable plate. A placement plate is welded to the lower part of the opposite side of the fixed plate and the movable plate, and a clamping frame is fixedly installed on the upper part of the opposite side of the fixed plate and the movable plate. A rotating shaft is rotatably connected to both sides inside the clamping frame, and a worm gear is fixedly installed on the outer ring of the rotating shaft. A clamping plate is fixedly installed on the upper and lower outer rings of the rotating shaft.

[0004] However, the above-mentioned device still has the following problems during implementation: After the injection molded part is clamped, the two sets of clamps are moved in opposite directions by the hydraulic rod, which can only realize unidirectional tensile testing. The testing mode is limited. This method is difficult to simulate the torsional stress that the sheet metal is subjected to in actual use, and it cannot reflect the strength changes under different temperature environments, resulting in an incomplete evaluation of the comprehensive mechanical properties of the sheet metal.

[0005] To address this issue, we provide a strength testing device for refrigerator injection molded parts. Summary of the Invention

[0006] The purpose of this invention is to provide a strength testing device for refrigerator injection molded parts. By combining the structure of the fixing component, the torsion component, and the environmental simulation component, this invention solves the problem that existing injection molded part strength testing equipment can only perform tensile testing on sheet metal after the injection molded part is clamped, and the testing process is relatively simple because it uses hydraulic rods to push two sets of clamps to move in opposite directions.

[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 device for refrigerator injection molded parts, comprising a testing shell, a base plate fixedly connected to the bottom of the testing shell, a movable column disposed on the top of the base plate, a crossbar slidably connected inside the movable column, a disc fixedly connected to the other end of the crossbar, and a first pressure sensor fixedly connected to one side of the disc; a fixing assembly is disposed inside the testing shell, the fixing assembly comprising a first clamping shell disposed on one side of the disc, a second clamping shell disposed on one side of the first clamping shell, a rotating shaft movably connected inside the first clamping shell, a turntable mounted on one side of the rotating shaft, a movable shaft mounted on one side of the turntable, a movable frame slidably connected to the surface of the movable shaft, and a clamping plate mounted on one side of the movable frame, the fixing assembly fixing the sheet metal injection molded part. The detection housing is equipped with a torsion assembly, which includes a fixed shaft mounted on one side of the second clamping housing, a gear mounted on the surface of the fixed shaft, a toothed plate meshing with the gear, a push shaft mounted on one side of the toothed plate, and a push plate slidably connected to the bottom of the push shaft. The torsion assembly is used to detect the torsion of the injection-molded sheet metal. The detection housing is also equipped with an environmental simulation assembly, which includes a heater and a temperature sensor mounted inside the detection housing, a water tank mounted on one side of the detection housing, a cooler mounted on one side of the water tank, a ventilation pipe connected to one side of the detection housing, and an exhaust fan mounted inside the ventilation pipe. The detection housing is further equipped with a drive assembly, which provides power for the detection of the injection-molded part.

[0009] The present invention is further configured such that the drive assembly includes a mounting post movably connected to the surface of a fixed shaft, a drive motor mounted on one side of the mounting post, a screw mounted on the output end of the drive motor, and a movable sleeve threadedly connected to the surface of the screw.

[0010] The invention is further configured such that the bottom of the movable column is fixedly connected to the movable sleeve, and the bottom of the mounting column is fixedly connected to the base plate.

[0011] The present invention is further configured such that a limit block is fixedly connected to the other end of the crossbar, and a first spring is sleeved on the surface of the crossbar, with one end of the first spring fixedly connected to the movable column.

[0012] The present invention is further configured such that the torsion assembly includes a servo motor installed inside the first clamping housing, a worm gear installed at the output end of the servo motor, and a worm wheel installed on the surface of the rotating shaft, wherein one side of the worm gear meshes with the worm wheel.

[0013] The present invention is further configured such that an anti-slip plate is movably connected to one side of the clamping plate, and a second pressure sensor is fixedly connected between the anti-slip plate and the clamping plate.

[0014] The present invention is further configured such that a telescopic rod is installed on one side of the clamping plate, a telescopic column is slidably connected to the surface of the telescopic rod, and the other end of the telescopic column is fixedly connected to the inner wall of the first clamping shell. The internal structures of the first clamping shell and the second clamping shell are the same.

[0015] The invention is further configured such that a fixed shell is slidably connected to the surface of the disk, the other side of the fixed shell is fixedly connected to a first clamping shell, and one side of the push plate is fixedly connected to a moving column.

[0016] The invention is further configured such that a horizontal plate is fixedly connected to one side of the mounting column, a sliding rod is slidably connected inside the horizontal rod, both ends of the sliding rod are fixedly connected to the toothed plate through fixing blocks, and a second spring is sleeved on the surface of the sliding rod.

[0017] The present invention is further configured such that the environmental simulation component includes a water pump connected to one side of the water storage tank, a heat sink installed inside the ventilation pipe, and a circulation pipe installed inside the heat sink. The water pump and the circulation pipe are connected by a pipeline, and the other end of the circulation pipe is connected to the water storage tank.

[0018] The present invention has the following beneficial effects: The present invention achieves stable clamping of both ends of the refrigerator injection molded part through the fixing component, ensuring that no displacement occurs during the test. The driving component drives the moving column and crossbar to move, and the first pressure sensor accurately measures the tensile strength. Through the gear rack and push plate structure in the torsion component, the torsional load in actual use is simulated, effectively evaluating the torsional resistance of the injection molded part. At the same time, the environmental simulation component integrates heating, cooling and circulating ventilation systems, which can conduct strength tests under different temperature conditions, fully simulating the actual working environment of the refrigerator, and significantly improving the accuracy and practicality of the test.

[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 perspective view of a strength testing device for refrigerator injection molded parts.

[0022] Figure 2 This is a schematic diagram of the internal structure of the testing shell in a refrigerator injection molding part strength testing device.

[0023] Figure 3 This is a cross-sectional view of the mounting column in a strength testing device for refrigerator injection molded parts.

[0024] Figure 4This is a cross-sectional view of a horizontal plate in a refrigerator injection molding strength testing device.

[0025] Figure 5 This is a cross-sectional view of the first clamping shell in a refrigerator injection molding part strength testing device.

[0026] Figure 6 This is a cross-sectional view of the fixed shell in a refrigerator injection molding part strength testing device.

[0027] Figure 7 This is a schematic diagram showing the connection between the moving shaft and the moving frame in a refrigerator injection molding strength testing device.

[0028] Figure 8 A strength testing device for refrigerator injection molded parts Figure 7 Rear view.

[0029] Figure 9 This is a cross-sectional view of a telescopic column in a refrigerator injection molding strength testing device.

[0030] Figure 10 This is a schematic diagram showing the connection between the anti-slip plate, the second pressure sensor, and the clamping plate in a refrigerator injection molding part strength testing device.

[0031] Figure 11 This is a rear view of the test shell in a refrigerator injection molding part strength testing device.

[0032] In the attached diagram: 1. Detection shell; 2. Base plate; 3. Moving column; 4. Crossbar; 5. Disc; 6. First pressure sensor; 7. Fixing assembly; 701. First clamping shell; 702. Second clamping shell; 703. Rotating shaft; 704. Turntable; 705. Moving shaft; 706. Moving frame; 707. Clamping plate; 8. Twisting assembly; 801. Fixing shaft; 802. Gear; 803. Gear plate; 804. Push shaft; 805. Push plate; 9. Environmental simulation assembly; 901. Heater; 902. Temperature sensor; 903. Water storage tank; 90 4. Refrigerator; 905. Ventilation duct; 906. Exhaust fan; 10. Drive assembly; 1010. Mounting column; 1020. Drive motor; 1030. Screw; 1040. Moving sleeve; 11. Limit block; 12. First spring; 806. Servo motor; 807. Worm gear; 808. Worm wheel; 13. Anti-slip plate; 14. Second pressure sensor; 15. Telescopic rod; 16. Telescopic column; 17. Fixed shell; 18. Horizontal plate; 19. Slide rod; 20. Second spring; 907. Water pump; 908. Heat sink; 909. Circulation pipe. Detailed Implementation

[0033] 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. Example 1

[0034] Please see Figures 1-11 This invention relates to a strength testing device for refrigerator injection molded parts, comprising a testing shell 1, a base plate 2 fixedly connected to the bottom of the testing shell 1, a movable column 3 disposed on the top of the base plate 2, a crossbar 4 slidably connected inside the movable column 3, a disc 5 fixedly connected to the other end of the crossbar 4, and a first pressure sensor 6 fixedly connected to one side of the disc 5; a fixing assembly 7 is disposed inside the testing shell 1, the fixing assembly 7 comprising a first clamping shell 701 disposed on one side of the disc 5, a second clamping shell 702 disposed on one side of the first clamping shell 701, a rotating shaft 703 movably connected inside the first clamping shell 701, a turntable 704 mounted on one side of the rotating shaft 703, a movable shaft 705 mounted on one side of the turntable 704, a movable frame 706 slidably connected to the surface of the movable shaft 705, and a clamping plate 707 mounted on one side of the movable frame 706, the fixing assembly 7 fixing the sheet metal injection molded part; the testing shell 1 is equipped with... A torsion assembly 8 is provided, which includes a fixed shaft 801 mounted on one side of the second clamping shell 702, a gear 802 mounted on the surface of the fixed shaft 801, a toothed plate 803 meshing with one side of the gear 802, a push shaft 804 mounted on one side of the toothed plate 803, and a push plate 805 slidably connected to the bottom of the push shaft 804. The torsion assembly 8 is used to detect the torsion of the injection molded part. An environmental simulation assembly 9 is provided inside the detection shell 1, which includes a heater 901 and a temperature sensor 902 mounted inside the detection shell 1, a water tank 903 mounted on one side of the detection shell 1, a cooler 904 mounted on one side of the water tank 903, a ventilation pipe 905 connected to one side of the detection shell 1, and an exhaust fan 906 mounted inside the ventilation pipe 905. A drive assembly 10 is provided inside the detection shell 1 to provide power for the detection of the injection molded part.

[0035] Specifically: the movable column 3 is used to achieve linear movement under the drive of the drive assembly 10 and transmits the motion to the crossbar 4. The crossbar 4 is used to connect the disc 5 and the movable column 3, and drives the disc 5 to move in a set direction under the drive of the movable column 3. The disc 5 is used to push the first pressure sensor 6 and the first clamping shell 701 to realize the tensile test of the injection molded part. The first pressure sensor 6 is used to detect and record the tensile force value of the injection molded part in real time during the tensile test. The first clamping shell 701 is used to clamp and fix the injection molded part from one end and serves as one of the force-bearing ends in the tensile or torsional test. The second clamping housing 702 is used to clamp and fix the injection molded part from the other end and serves as the rotating end in the torsion test. The rotating shaft 703 is used to rotate inside the first clamping housing 701 and drive the turntable 704 to move through its rotation. The turntable 704 is used to convert the rotational motion of the rotating shaft 703 into the eccentric motion of the moving shaft 705. The moving shaft 705 is used to push the moving frame 706 to move linearly under the drive of the turntable 704. The clamping plate 707 is used to directly contact and clamp the injection molded part and transmit the clamping force. The fixed shaft 801 is used to support the gear 802 and serves as the second clamping housing 701. The rotation center of component 2, gear 802 meshes with gear plate 803, converting the linear motion of gear plate 803 into the rotational motion of fixed shaft 801. Gear plate 803 moves linearly under the push of push plate 805, thereby driving gear 802 to rotate. Push shaft 804 connects gear plate 803 and push plate 805, transmitting the thrust of push plate 805. Push plate 805 is linked with moving column 3, converting the linear motion of moving column 3 into the lifting motion of push shaft 804. Environmental simulation component 9 simulates high and low temperature environments inside the test shell 1, testing the injection molded parts under varying conditions. Regarding the strength performance at the same temperature, heater 901 is used to heat the inside of the detection shell 1 to simulate a high-temperature operating environment; temperature sensor 902 is used to monitor the temperature inside the detection shell 1 in real time and provide feedback control for environmental simulation; water tank 903 is used to store cooling medium and provide a cold source for low-temperature environment simulation; cooler 904 is used to cool the cooling medium in water tank 903; ventilation duct 905 is used to form an air circulation channel to promote uniform temperature distribution inside the detection shell 1; and exhaust fan 906 is used to drive air to flow in ventilation duct 905 to accelerate the heat exchange process. Example 2

[0036] Please see Figures 1-11Based on Embodiment 1, the drive assembly 10 includes a mounting post 1010 movably connected to the surface of the fixed shaft 801, a drive motor 1020 mounted on one side of the mounting post 1010, a screw 1030 mounted on the output end of the drive motor 1020, a movable sleeve 1040 threadedly connected to the surface of the screw 1030, the bottom of the movable post 1010 fixedly connected to the movable sleeve 1040, the bottom of the mounting post 1010 fixedly connected to the base plate 2, a limit block 11 fixedly connected to the other end of the crossbar 4, a first spring 12 sleeved on the surface of the crossbar 4, one end of the first spring 12 fixedly connected to the movable post 3, and the torsion assembly 8 also includes a servo motor 806 mounted inside the first clamping shell 701, a worm 807 mounted on the output end of the servo motor 806, and a worm wheel 808 mounted on the surface of the rotating shaft 703, with one side of the worm 807 meshing with the worm wheel 808.

[0037] Specifically: Mounting post 1010 is used to fix drive motor 1020 and provide support for screw 1030. Drive motor 1020 is used to provide rotational power. Screw 1030 is used to convert the rotational motion of drive motor 1020 into linear motion of moving sleeve 1040. Moving sleeve 1040 is used to thread into screw 1030 and move along its axial direction when screw 1030 rotates. Limiting block 11 is used to prevent crossbar 4 from accidentally coming out of moving post 3. First spring 12 is used to provide buffer when crossbar 4 moves under force and to assist crossbar 4 in resetting after unloading. Servo motor 806 is used to provide precise rotational power to drive worm 807 to rotate. Worm 807 is used to mesh with worm wheel 808 to transmit power from servo motor 806 to worm wheel 808. Worm wheel 808 is used to be fixedly connected to rotating shaft 703 to transmit rotational motion from worm 807 to rotating shaft 703. Example 3

[0038] Please see Figures 1-11Based on Embodiments 1 and 2, an anti-slip plate 13 is movably connected to one side of the clamping plate 707, and a second pressure sensor 14 is fixedly connected between the anti-slip plate 13 and the clamping plate 707. A telescopic rod 15 is installed on one side of the clamping plate 707, and a telescopic column 16 is slidably connected to the surface of the telescopic rod 15. The other end of the telescopic column 16 is fixedly connected to the inner wall of the first clamping shell 701. The internal structures of the first clamping shell 701 and the second clamping shell 702 are the same. A fixed shell 17 is slidably connected to the surface of the disc 5, and the other side of the fixed shell 17 is fixedly connected to the first clamping shell 701. The push plate 805 is located on one side... The moving column 3 is fixedly connected to the mounting column 1010. A horizontal plate 18 is fixedly connected to one side of the mounting column 1010. A sliding rod 19 is slidably connected inside the horizontal bar 4. Both ends of the sliding rod 19 are fixedly connected to the toothed plate 803 through fixing blocks. A second spring 20 is sleeved on the surface of the sliding rod 19. The environmental simulation component 9 also includes a water pump 907 connected to one side of the water storage tank 903, a heat sink 908 installed inside the ventilation pipe 905, and a circulation pipe 909 installed inside the heat sink 908. The water pump 907 and the circulation pipe 909 are connected through a pipe. The other end of the circulation pipe 909 is connected to the water storage tank 903.

[0039] Specifically: the anti-slip plate 13 is used to increase the friction between the clamping plate 707 and the injection molded part, preventing slippage during testing; the second pressure sensor 14 is used to monitor the local pressure on the injection molded part in real time during clamping and twisting; the telescopic rod 15 and the telescopic column 16 together constitute the moving guide mechanism of the clamping plate 707, ensuring that the clamping plate 707 moves in a straight line; the telescopic column 16 is used to fix to the inner wall of the first clamping shell 701, providing a stable guiding foundation for the telescopic rod 15; the fixed shell 17 is used to guide the disc 5 to move along the set trajectory and connect the disc 5 to the first clamping shell 701. 1. The horizontal plate 18 is used to enhance the structural strength of the mounting column 1010. The sliding rod 19 is used to pass through the inside of the horizontal bar 4 and connect its two ends to the toothed plate 803 through the fixing block to transmit the movement and improve the movement stability of the toothed plate 803. The second spring 20 resets the toothed plate 803. The water pump 907 is used to pump the cooling medium in the water storage tank 903 into the circulation pipe 909. The heat sink 908 is used to increase the contact area with the air and improve the heat exchange efficiency between the cooling medium and the air. The circulation pipe 909 is used to transport the cooling medium so that it flows through the heat sink 908 for heat exchange.

[0040] The working principle of this invention is as follows: the operator inserts one side of the injection molded part sheet to be inspected into the first clamping shell 701, such as... Figure 1As shown, the servo motor 806 inside the first clamping shell 701 is then started by the external controller. The servo motor 806, together with the worm gear 807, drives the worm wheel 808 to rotate. The worm wheel 808, together with the rotating shaft 703, drives the turntable 704 to rotate. The turntable 704 drives the two sets of moving shafts 705 to rotate synchronously. The moving shafts 705 push the moving frame 706 and the clamping plate 707 to move. The clamping plate 707 drives the anti-slip plate 13 to move. The two sets of anti-slip plates 13 move relative to each other to clamp and fix the injection molded part sheet, and limit one end of the injection molded part sheet.

[0041] Then, the servo motor 806 is started. The servo motor 806, together with the screw 1030, drives the moving sleeve 1040 to move. The moving sleeve 1040, together with the moving column 3, drives the crossbar 4 and the disc 5 to move. The disc 5 pushes the first clamping shell 701 and the injection molded part sheet to move, so that the other end of the injection molded part sheet is inserted into the second clamping shell 702. Then, the servo motor 806 located inside the second clamping shell 702 is started, which pushes the anti-slip plates 13 on both sides inside the second clamping shell 702 to move relative to each other, fixing the other end of the injection molded part sheet, thus completing the preparation work for testing.

[0042] When tensile testing of injection molded sheet is required, after the preparation work is completed, the servo motor 806 can be controlled to rotate in the opposite direction, driving the moving column 3 to move to the left. The moving column 3, together with the crossbar 4, drives the disc 5 to move. The disc 5, together with the fixed shell 17, drives the first clamping shell 701 to move. The first clamping shell 701 stretches the injection molded sheet. While the disc 5 is moving, it squeezes the first pressure sensor 6. The first pressure sensor 6 receives the tensile force on the injection molded sheet until the injection molded sheet breaks, thus completing the tensile test.

[0043] When a torsion test is required on the injection molded sheet, after the preparation work is completed, the servo motor 806 is controlled to rotate in the forward direction, pushing the moving column 3 to move to the right. The moving column 3 pushes the first clamping shell 701 to press against the injection molded sheet. At this time, the position of the second clamping shell 702 remains unchanged. When the moving column 3 continues to move, it slides on the surface of the crossbar 4 and drives the push plate 805 to move synchronously. When the push plate 805 moves, it contacts the push shaft 804. The inclined surface of the push plate 805 pushes the push shaft 804 to move upward. The push shaft 804 drives the toothed plate 803 to move. The toothed plate 803, in conjunction with the gear 802, drives the fixed shaft 801 to rotate. The fixed shaft 801 drives the second clamping shell 702 to rotate. At this time, the first clamping shell 701 will not rotate. The injection molded sheet is torsioned by the first clamping shell 701 and the second clamping shell 702. When the anti-slip plate 13 presses against the injection molded part to torsion, the second pressure sensor 14 receives the torsion force to complete the torsion detection.

[0044] During the tensile and torsional testing of injection molded sheet metal, heater 901 can be activated simultaneously. Heater 901 increases the temperature inside the testing housing 1, allowing for separate testing of the strength of the injection molded sheet metal at different temperatures, further improving the accuracy of the test data. After the temperature-increasing test is completed, exhaust fan 906, cooler 904, and water pump 907 can be activated simultaneously. Cooler 904 cools the coolant inside water tank 903, and water pump 907 draws the coolant into circulation pipe 909 for heat conduction. The heat conduction area is increased through heat sink 908. When exhaust fan 906 drives airflow, cold air is discharged into testing housing 1 for low-temperature testing of injection molded sheet metal, further improving the accuracy of the test data.

[0045] 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 device for refrigerator injection molded parts, comprising a testing shell (1), characterized in that: The bottom of the detection shell (1) is fixedly connected to a base plate (2), and a movable column (3) is provided on the top of the base plate (2). A crossbar (4) is slidably connected inside the movable column (3). A disc (5) is fixedly connected to the other end of the crossbar (4), and a first pressure sensor (6) is fixedly connected to one side of the disc (5). The detection shell (1) is provided with a fixing component (7). The fixing component (7) includes a first clamping shell (701) disposed on one side of the disc (5), a second clamping shell (702) disposed on one side of the first clamping shell (701), a rotating shaft (703) movably connected to the inside of the first clamping shell (701), a turntable (704) installed on one side of the rotating shaft (703), a moving shaft (705) installed on one side of the turntable (704), a moving frame (706) slidably connected to the surface of the moving shaft (705), and a clamping plate (707) installed on one side of the moving frame (706). The fixing component (7) fixes the sheet metal injection molded part. The detection housing (1) is provided with a torsion assembly (8). The torsion assembly (8) includes a fixed shaft (801) installed on one side of the second clamping housing (702), a gear (802) installed on the surface of the fixed shaft (801), a toothed plate (803) meshing with one side of the gear (802), a push shaft (804) installed on one side of the toothed plate (803), and a push plate (805) slidably connected to the bottom of the push shaft (804). The torsion of the sheet metal injection molded part is detected by the torsion assembly (8). The detection shell (1) is equipped with an environmental simulation component (9). The environmental simulation component (9) includes a heater (901) and a temperature sensor (902) installed inside the detection shell (1), a water storage tank (903) installed on one side of the detection shell (1), a cooler (904) installed on one side of the water storage tank (903), a ventilation pipe (905) connected to one side of the detection shell (1), and an exhaust fan (906) installed inside the ventilation pipe (905). The detection housing (1) is equipped with a drive assembly (10) which provides power for the detection of the injection molded part.

2. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: The drive assembly (10) includes a mounting post (1010) movably connected to the surface of a fixed shaft (801), a drive motor (1020) mounted on one side of the mounting post (1010), a screw (1030) mounted on the output end of the drive motor (1020), and a movable sleeve (1040) threadedly connected to the surface of the screw (1030).

3. The refrigerator injection molded part strength testing device according to claim 2, characterized in that: The bottom of the movable column (3) is fixedly connected to the movable sleeve (1040), and the bottom of the mounting column (1010) is fixedly connected to the base plate (2).

4. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: The other end of the crossbar (4) is fixedly connected to a limiting block (11), and a first spring (12) is sleeved on the surface of the crossbar (4). One end of the first spring (12) is fixedly connected to the moving column (3).

5. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: The twisting assembly (8) also includes a servo motor (806) installed inside the first clamping housing (701), a worm (807) installed at the output end of the servo motor (806), and a worm wheel (808) installed on the surface of the rotating shaft (703), wherein one side of the worm (807) meshes with the worm wheel (808).

6. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: A slip plate (13) is movably connected to one side of the clamping plate (707), and a second pressure sensor (14) is fixedly connected between the slip plate (13) and the clamping plate (707).

7. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: A telescopic rod (15) is installed on one side of the clamping plate (707), and a telescopic column (16) is slidably connected to the surface of the telescopic rod (15). The other end of the telescopic column (16) is fixedly connected to the inner wall of the first clamping shell (701). The internal structure of the first clamping shell (701) and the second clamping shell (702) is the same.

8. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: The disk (5) has a fixed shell (17) slidably connected to its surface. The other side of the fixed shell (17) is fixedly connected to the first clamping shell (701). One side of the push plate (805) is fixedly connected to the moving column (3).

9. The refrigerator injection molded part strength testing device according to claim 2, characterized in that: A horizontal plate (18) is fixedly connected to one side of the mounting column (1010), and a sliding rod (19) is slidably connected inside the horizontal bar (4). Both ends of the sliding rod (19) are fixedly connected to the toothed plate (803) through fixing blocks, and a second spring (20) is sleeved on the surface of the sliding rod (19).

10. The refrigerator injection molded part strength testing device according to claim 1, characterized in that: The environmental simulation component (9) also includes a water pump (907) connected to one side of the water storage tank (903), a heat sink (908) installed inside the ventilation pipe (905), and a circulation pipe (909) installed inside the heat sink (908). The water pump (907) and the circulation pipe (909) are connected by a pipeline, and the other end of the circulation pipe (909) is connected to the water storage tank (903).

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