Strength detection device for plastic product production

Abstract

The invention relates to the technical field of plastic strength detection, in particular to a strength detection device for plastic product production, which comprises a base and a hydraulic driving mechanism fixedly connected to the base, an upper frame is fixedly connected between driving ends of the hydraulic driving mechanism, a detection platform is arranged on the base, and an adjusting cavity is formed in the detection platform. Through the arrangement of the structure, the bottom blocks can be quickly popped out, then the two sides of the bottom of the plastic tray can be supported, the middle of the bottom end of the plastic tray is kept hollow, bending strength detection can be quickly carried out, the bottom blocks are withdrawn, the top blocks are popped out, and the detection efficiency is improved. The plastic tray is comprehensively extruded in cooperation with the detection block, and the bearing strength of the plastic tray can be rapidly detected, so that the detection mode of the detection device can be rapidly changed according to the detection requirement, and the detection efficiency of the device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic strength detection, and particularly to a strength detection device for plastic product production. Background Art

[0002] Plastic products are a general term for daily necessities, industrial products, etc. processed mainly with plastics, including products of all processes such as injection molding and thermoforming with plastics as raw materials. When processing plastic products, in order to ensure the quality of the products, it is usually necessary to select some products for strength detection. There are various ways of strength detection, such as extrusion type, bending type, etc., so a strength detection device is required.

[0003] The existing plastic pallet detection device mainly places the plastic pallet on the detection table, places a plurality of extrusion rods on the plastic pallet, and then drives the detection piece to move downward through the hydraulic drive assembly to extrude the plastic pallet and the extrusion rods, so as to realize the weighing strength detection of the plastic pallet and ensure the load-bearing performance and service life of the plastic pallet.

[0004] When the existing plastic pallet is subjected to strength detection, it is necessary to detect a variety of indexes, such as load-bearing strength or bending strength test. However, during the process of detecting the load-bearing strength of the plastic pallet by the existing strength detection device, it is necessary to place a plurality of extrusion rods on the plastic pallet for detection. When it is necessary to detect the bending strength of the plastic pallet, it is necessary to place two bumps at the bottom of the plastic pallet to keep the middle part of its bottom end hollow, and place two extrusion rods on the plastic pallet to extrude the plastic pallet for bending strength detection, so as to realize the change of the strength detection method of the plastic pallet. This is not only time-consuming and laborious, but also greatly reduces the detection efficiency of the device.

[0005] Therefore, a strength detection device for plastic product production is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a strength detection device for plastic product production to overcome the disadvantages existing in the background art.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A strength detection device for plastic product production, including a base, and a hydraulic driving mechanism fixedly connected to the base. A upper frame is fixedly connected between the driving ends of the hydraulic driving mechanism. A detection platform is provided on the base. An adjustment cavity is opened inside the detection platform. Bottom blocks are slidably connected through both sides of the top of the detection platform. A pair of detection blocks are fixedly connected to the bottom of the upper frame. Top blocks are slidably connected through the positions corresponding to the bottom blocks at the bottom of the upper frame. A pair of round rods are fixedly connected to both outer sides of the bottom blocks and the top blocks. Extrusion right-angle blocks with inclined surfaces are provided at the positions corresponding to the round rods on the outer walls of the bottom blocks and the top blocks. A connecting plate is fixedly connected between the extrusion right-angle blocks. U-shaped rods are slidably connected through the front sides of the detection platform and the upper frame. Straight plates are fixedly connected to the rear sides of the U-shaped rods. Fixed rods are fixedly connected between the straight plates and the extrusion right-angle blocks. Limiting plates are fixedly connected to the inner sides of the upper frame and the adjustment cavity. Limiting blocks are fixedly connected to the rear sides of the straight plates. A limiting mechanism for limiting the position of the extrusion right-angle blocks is provided on the limiting plates.

[0008] In the above technical solution, further, the round rods on the bottom blocks are arranged on the bottom side, the round rods on the top blocks are arranged on the top side, the inclined surface of the extrusion right-angle block is in contact with the outer wall of the round rod, and the inclined surface positions between the extrusion right-angle block beside the bottom block and the extrusion right-angle block beside the top block are symmetrically arranged.

[0009] In the above technical solution, further, recessed grooves are opened on both sides away from each other of the bottom blocks and the top blocks. Three lower springs are fixedly connected inside the grooves. The other ends of the three lower springs are respectively fixedly connected to the inner side of the upper frame and the inner side of the adjustment cavity.

[0010] In the above technical solution, further, the limiting mechanism includes a limiting right-angle block with an inclined surface. A sliding rod is slidably connected through the side wall of the limiting block. The limiting right-angle block is fixedly connected to the side wall of the sliding rod. An upper right-angle block with an inclined surface is fixedly connected to the side wall of the limiting plate. The inclined surfaces of the upper right-angle block and the limiting right-angle block are arranged on the side close to each other. A lower right-angle block with an inclined surface is slidably connected to the side wall of the limiting plate behind the upper right-angle block. The inclined surface of the lower right-angle block is symmetrically arranged with the inclined surface of the upper right-angle block.

[0011] In the above technical solution, further, a limiting spring is fixedly connected between the outer wall of the sliding rod and the side wall of the limiting block. A sliding groove is opened on the side wall of the limiting plate. A slider is slidably connected inside the sliding groove. The slider is fixedly connected to the side wall of the lower right-angle block. A return spring is fixedly connected between the side wall of the sliding groove and the side wall of the slider.

[0012] In the above technical solution, further, a plurality of anti-slip grooves are equidistantly formed at the top end of the bottom block, and upper springs are fixedly connected to the inner sides of the U-shaped rods.

[0013] In the above technical solution, further, a T-shaped groove is formed at the top end of the detection platform. A cylinder is rotatably connected inside the T-shaped groove. A positioning plate is fixedly connected to the side wall of the cylinder. A touch sensor is fixedly connected through the side wall of the positioning plate. The touch sensor is electrically connected to the hydraulic driving mechanism through a controller. An elastic rope is wound around the outer wall of the cylinder. One end of the elastic rope is fixedly connected to the outer wall of the cylinder, and the other end of the elastic rope is fixedly connected to the top end of the limiting block located in the adjustment cavity.

[0014] In the above technical solution, further, an upper limiting block for restricting the positioning plate from turning downward is fixedly connected to the bottom end of the T-shaped groove, and a lower limiting block for restricting the upward turning position of the positioning plate is fixedly connected inside the T-shaped groove beside the cylinder. A scroll spring is arranged inside the cylinder, and one end of the scroll spring is fixedly connected to the inside of the cylinder, and the other end of the scroll spring is fixedly connected to the inside of the T-shaped groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the arrangement of structures such as the extrusion right-angle block, round rod, and limiting mechanism, the present invention can quickly eject the bottom block, and then can support both sides of the bottom of the plastic tray, so that the middle part of the bottom end of the plastic tray remains hollow, thereby quickly performing the bending strength test. And by retracting the bottom block and ejecting the top block, and cooperating with the detection block to fully squeeze the plastic tray, the bearing strength test of the plastic tray can be quickly carried out, so that according to the needs of the test, the detection method of the detection device can be quickly changed, greatly improving the detection efficiency of the device.

[0016] 2. Through the arrangement of structures such as the cylinder, positioning plate, and touch sensor, the present invention can pull out the positioning plate and the touch sensor while ejecting the bottom block. Furthermore, when performing the bending strength test of the plastic tray, there is no need for workers to place the indicating block at the bottom of the plastic tray to mark the position where the plastic tray deforms to the maximum deformation to end the experiment, further improving the convenience performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front three-dimensional structural schematic diagram of the detection device of the present invention; Figure 2 It is a bottom three-dimensional structural schematic diagram of the detection device of the present invention; Figure 3 It is a top three-dimensional structural schematic diagram of the detection platform of the present invention; Figure 4 It is an attached Figure 4 Partial enlarged structural schematic diagram at A in the present invention; Figure 5 Schematic diagram of the fully-sectioned three-dimensional structure of the side of the detection platform of the present invention; Figure 6 Attachment of the present invention Figure 5 Schematic diagram of the partially enlarged structure at position B in [the figure]; Figure 7 Schematic diagram of the overall external structure of the bottom block, straight plate and limiting plate of the present invention; Figure 8 Schematic diagram of the overall external structure of the limiting plate of the present invention; Figure 9 Schematic diagram of the overall external structure of the top block and the straight plate of the present invention.

[0018] In the figure: 1. Base; 2. Hydraulic drive mechanism; 3. Upper frame; 4. Detection platform; 5. Adjustment cavity; 6. Bottom block; 7. Detection block; 8. Top block; 9. Round rod; 10. Extrusion right-angle block; 11. Connecting plate; 12. U-shaped rod; 13. Straight plate; 14. Fixed rod; 15. Limiting plate; 16. Upper spring; 17. Groove; 18. Lower spring; 19. Limiting right-angle block; 20. Limiting block; 21. Sliding rod; 22. Upper right-angle block; 23. Lower right-angle block; 24. Limiting spring; 25. Slide groove; 26. Slide block; 27. Return spring; 28. Anti-slip groove; 29. T-shaped groove; 30. Cylinder; 31. Positioning plate; 32. Touch sensor; 33. Elastic rope; 34. Upper limiting block; 35. Lower limiting block; 36. Volute spring. Detailed implementation manners

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0020] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0021] Such as Figures 1-9A strength detection device for plastic product production shown in the figure includes a base 1 and a hydraulic drive mechanism 2 fixedly connected to the base 1. The hydraulic drive mechanism 2 mainly consists of structures such as a support frame, a hydraulic telescopic cylinder, and a monitoring unit. It can automatically drive the upper frame 3 to move downward to extrude the plastic tray, realizing the strength detection of the plastic tray. This is a mature technology in the prior art and will not be described in detail here. A upper frame 3 is fixedly connected between the drive ends of the hydraulic drive mechanism 2. A detection platform 4 is provided on the base 1. The detection platform 4 is used to place the plastic tray. An adjustment cavity 5 is opened inside the detection platform 4. Both sides of the top of the detection platform 4 are slidably connected through the bottom blocks 6. A pair of detection blocks 7 are fixedly connected to the bottom of the upper frame 3. The detection blocks 7 are symmetrically arranged. After the bottom blocks 6 support the plastic tray, the bending strength of the plastic tray can be tested by extruding the middle of the plastic tray; On the bottom of the upper frame 3 and at positions corresponding to the bottom blocks 6, top blocks 8 are slidably connected through. On both outer walls of the bottom blocks 6 and the top blocks 8, a pair of round rods 9 are fixedly connected. At positions corresponding to the round rods 9 on the outer walls of the bottom blocks 6 and the top blocks 8, extrusion right-angle blocks 10 with inclined surfaces are provided. A connecting plate 11 is fixedly connected between the extrusion right-angle blocks 10. U-shaped rods 12 are slidably connected through the front sides of the detection platform 4 and the upper frame 3. Straight plates 13 are fixedly connected to the rear sides of the U-shaped rods 12. Fixed rods 14 are fixedly connected between the straight plates 13 and the extrusion right-angle blocks 10. Limiting plates 15 are fixedly connected to the inner sides of the upper frame 3 and the adjustment cavity 5. Limiting blocks 20 are fixedly connected to the rear sides of the straight plates 13. A limiting mechanism for limiting the position of the extrusion right-angle blocks 10 is provided on the limiting plates 15; Moreover, the round rods 9 on the bottom blocks 6 are arranged on the bottom side, the round rods 9 on the top blocks 8 are arranged on the top side, and the inclined surfaces of the extrusion right-angle blocks 10 are in contact with the outer walls of the round rods 9. And the inclined surface positions between the extrusion right-angle blocks 10 beside the bottom blocks 6 and the extrusion right-angle blocks 10 beside the top blocks 8 are symmetrically arranged; On the sides away from each other of the bottom blocks 6 and the top blocks 8, recessed grooves 17 are opened. Inside the grooves 17, three lower springs 18 are fixedly connected. The other ends of the three lower springs 18 are fixedly connected to the inner side of the upper frame 3 and the inner side of the adjustment cavity 5 respectively. Through the setting of the lower springs 18, it is convenient to pull the bottom blocks 6 and the top blocks 8 for quick reset during reset; The limiting mechanism includes a limiting right-angle block 19 with an inclined surface. A sliding rod 21 is slidably connected through the side wall of the limiting block 20. The limiting right-angle block 19 is fixedly connected to the side wall of the sliding rod 21. An upper right-angle block 22 with an inclined surface is fixedly connected to the side wall of the limiting plate 15. And the inclined surface of the upper right-angle block 22 and the inclined surface of the limiting right-angle block 19 are arranged on the side close to each other. A lower right-angle block 23 with an inclined surface is slidably connected to the side wall of the limiting plate 15 behind the upper right-angle block 22. The inclined surface of the lower right-angle block 23 and the inclined surface of the upper right-angle block 22 are symmetrically arranged in position; A limiting spring 24 is fixedly connected between the outer wall of the sliding rod 21 and the side wall of the limiting block 20. A sliding groove 25 is formed in the side wall of the limiting plate 15, and a sliding block 26 is slidably connected inside the sliding groove 25. Through the arrangement of the sliding block 26 and the sliding groove 25, the sliding position of the lower right-angle block 23 can be limited. The sliding block 26 is fixedly connected to the side wall of the lower right-angle block 23, and a return spring 27 is fixedly connected between the side wall of the sliding groove 25 and the side wall of the sliding block 26. The return spring 27 facilitates the rapid reset of the lower right-angle block 23. When performing a strength test on the plastic tray, when it is necessary to perform a bearing strength test on the plastic tray, first place the plastic tray on the test platform 4, and then press the U-shaped rod 12 on the upper frame 3 to push the straight plate 13 to slide backward, and gradually compress the upper spring 16. At the same time, the corresponding extrusion right-angle block 10 will be driven to move through the fixed rod 14 and the connecting plate 11, and then the round rod 9 will be extruded to slide downward through the inclined surface of the extrusion right-angle block 10, so as to extrude the top block 8 to slide downward, extend out of the upper frame 3, and gradually stretch the lower spring 18. During this process, the movement of the straight plate 13 will drive the limiting block 20, the sliding rod 21 and the limiting right-angle block 19 to move. When the limiting right-angle block 19 moves beside the upper right-angle block 22, the inclined surface of the limiting right-angle block 19 will fit with the inclined surface of the upper right-angle block 22. Since the upper right-angle block 22 is fixed beside the limiting plate 15, the limiting right-angle block 19 will be extruded by the inclined surface of the upper right-angle block 22 and gradually slide, driving the sliding rod 21 to slide on the limiting block 20, and at the same time gradually stretching the limiting spring 24. Then when the limiting right-angle block 19 moves out beside the upper right-angle block 22, the extrusion on the limiting right-angle block 19 is released, and then under the elastic force of the limiting spring 24, it is pushed to reset, driving the limiting right-angle block 19 to be stuck behind the upper right-angle block 22, thereby restricting the sliding position of the limiting block 20. At the same time, the extrusion right-angle block 10 completely extrudes the top block 8, so that the bottom of the top block 8 and the bottom of the test block 7 are on the same plane. Then the hydraulic driving mechanism 2 can be controlled to start to drive the upper frame 3 to move downward, and the top block 8 and the test block 7 are extruded on the plastic tray to realize the detection of the bearing strength of the plastic tray. When it is necessary to test the bending strength of the plastic tray, first continue to press the U-shaped rod 12 on the upper frame 3 to drive the straight plate 13 and the limiting block 20 to slide backward. At this time, the round rod 9 will slide to the bottom end of the extrusion right-angle block 10. At the same time, the sliding rod 21 and the limiting right-angle block 19 will be driven to slide backward to beside the lower right-angle block 23. At this time, since the lower right-angle block 23 cannot slide backward continuously, under the extrusion of the lower right-angle block 23, the inclined surface of the limiting right-angle block 19 will slide under the extrusion of the end of the lower right-angle block 23, driving the sliding rod 21 to slide and stretching the limiting spring 24. Then when the limiting right-angle block 19 slides out from the front end of the lower right-angle block 23, the side end of the limiting right-angle block 19 will be stuck on the inclined surface of the lower right-angle block 23 under the elastic force of the limiting spring 24. Subsequently, the U-shaped rod 12 can be released, and then under the elastic force of the upper spring 16, the U-shaped rod 12, the straight plate 13 and the limiting block 20 are pulled to reset. At the same time, the movement of the limiting right-angle block 19 will drive the lower right-angle block 23 to move, and drive the slider 26 to slide in the chute 25, and gradually compress the reset spring 27. Then, when the limiting right-angle block 19 pushes the lower right-angle block 23 to the rear side of the upper right-angle block 22, the lower right-angle block 23 cannot move forward. Thus, under the pulling force of the upper spring 16, the limiting block 20 is pulled to move forward. Then, the limiting right-angle block 19 slides under the extrusion of the inclined surface of the lower right-angle block 23, and at the same time drives the sliding rod 21 to slide, and stretches the limiting spring 24. Then, the limiting right-angle block 19 slides out of the inclined surface of the lower right-angle block 23, thereby releasing the restriction on the limiting right-angle block 19, and the straight plate 13 can be reset, and drives the extrusion right-angle block 10 to reset, thereby releasing the extrusion on the round rod 9. Then, under the elastic force of the lower spring 18, the top block 8 is pulled to reset; Then, the U-shaped rod 12 on the detection platform 4 can be pressed, and the above operations are repeated to eject the two bottom blocks 6. Then, the plastic tray can be placed on the bottom blocks 6, and the hydraulic driving mechanism 2 is controlled to start to drive the upper frame 3 and the detection block 7 to move downward to realize the compressive strength detection of the plastic tray.

[0022] To improve the practical performance of the device, a number of anti-slip grooves 28 are equidistantly arranged at the top end of the bottom block 6. Through the arrangement of the anti-slip grooves 28, a certain anti-slip effect can be achieved on the plastic tray placed on the bottom block 6, thereby improving the stability during the detection process. Upper springs 16 are fixedly connected to the inner sides of the U-shaped rods 12. Through the arrangement of the upper springs 16, it is convenient to quickly push the straight plate 13 and the U-shaped rod 12 to reset when the straight plate 13 is released from the restriction.

[0023] In order to be able to pull out the positioning plate 31 and the touch sensor 32 while ejecting the bottom block 6, a T-shaped groove 29 is provided at the top end of the detection platform 4. Through the arrangement of the T-shaped groove 29, the positioning plate 31 and the touch sensor 32 can be accommodated to avoid being blocked when the plastic tray is subjected to the bearing strength test. A cylinder 30 is rotatably connected to the inner side of the T-shaped groove 29. A positioning plate 31 is fixedly connected to the side wall of the cylinder 30. A touch sensor 32 is fixedly connected through the side wall of the positioning plate 31. The touch sensor 32 is electrically connected to the hydraulic driving mechanism 2 through a controller. When the plastic tray reaches the specified bending position, the plastic tray will touch the touch sensor 32. Then, the touch sensor 32 transmits the signal to the controller, and the controller controls the hydraulic driving mechanism 2 to stop running, and the detection can be completed to realize the automatic control of the device. An elastic rope 33 is wound around the outer wall of the cylinder 30. One end of the elastic rope 33 is fixedly connected to the outer wall of the cylinder 30, and the other end of the elastic rope 33 is fixedly connected to the top end of the limiting block 20 located in the adjustment cavity 5; A upper limiting block 34 for restricting the downward flipping of the positioning plate 31 is fixedly connected to the bottom end of the T-shaped groove 29. A lower limiting block 35 for restricting the upward flipping position of the positioning plate 31 is fixedly connected to the inner side of the T-shaped groove 29 and beside the cylinder 30. A scroll spring 36 is arranged inside the cylinder 30, and one end of the scroll spring 36 is fixedly connected to the inner side of the cylinder 30, and the other end of the scroll spring 36 is fixedly connected to the inner side of the T-shaped groove 29; While pressing the U-shaped rod 12 on the pressing detection platform 4 to eject the bottom block 6, through the sliding of the straight plate 13 and the limiting block 20, the elastic cord 33 will be driven to move, and then the part of the elastic cord 33 wound around the cylinder 30 will be pulled out. And the other end of the elastic cord 33 is fixed to the cylinder 30, so the cylinder 30 will be driven to rotate simultaneously, and the positioning plate 31 will be driven to rotate upward. At this time, the flipping position of the positioning plate 31 will be restricted by the lower limiting block 35, so that the positioning plate 31 maintains a vertical state. During this process, since one end of the scroll spring 36 is fixed to the inner side of the cylinder 30 and the other end is fixed to the inner side of the T-shaped groove 29, through the rotation of the cylinder 30, the scroll spring 36 will be gradually compressed. Subsequently, the limiting block 20 continues to pull the elastic cord 33 to a specified position (the elastic cord 33 is made of an elastic material, and when the limiting block 20 continues to move and releases the limit later, the elastic cord 33 can be pulled). Subsequently, when testing the bending strength of the plastic tray, when the middle part of the plastic tray reaches a certain bending degree and touches the touch sensor 32, at this time, the plastic tray reaches the specified test position, and the test can be stopped (it should be noted here that since the height of the bottom block 6 is relatively high, there is no need to squeeze the plastic tray into deformation on the detection platform 4. As long as it reaches the specified position, it will completely break, so unnecessary test time is reduced). Finally, when resetting, repeat the above operations in reverse to retract the positioning plate 31.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention.

[0025] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An intensity detection device for plastic product production, comprising a base (1), and a hydraulic drive mechanism (2) fixedly connected to the base (1), characterized in that: A top frame (3) is fixedly connected between the driving ends of the hydraulic driving mechanism (2). A detection platform (4) is provided on the base (1). An adjustment cavity (5) is formed inside the detection platform (4). Bottom blocks (6) are slidably connected through both sides of the top of the detection platform (4). A pair of detection blocks (7) are fixedly connected to the bottom of the top frame (3). Top blocks (8) are slidably connected through the bottom of the top frame (3) at positions corresponding to the bottom blocks (6). A pair of round rods (9) are fixedly connected to both outer sides of the outer walls of the bottom blocks (6) and the top blocks (8). Extrusion right-angle blocks (10) with inclined surfaces are provided at positions corresponding to the round rods (9) on the outer walls of the bottom blocks (6) and the top blocks (8). A connecting plate (11) is fixedly connected between the extrusion right-angle blocks (10). U-shaped rods (12) are slidably connected through the front sides of the detection platform (4) and the top frame (3). Straight plates (13) are fixedly connected to the rear sides of the U-shaped rods (12). Fixed rods (14) are fixedly connected between the straight plates (13) and the extrusion right-angle blocks (10). Limiting plates (15) are fixedly connected to the inner sides of the top frame (3) and the adjustment cavity (5). Limiting blocks (20) are fixedly connected to the rear sides of the straight plates (13). A limiting mechanism for limiting the positions of the extrusion right-angle blocks (10) is provided on the limiting plates (15).

2. The strength detection device for plastic product production according to claim 1, wherein: Moreover, the round rods (9) on the bottom blocks (6) are arranged on the bottom side, the round rods (9) on the top blocks (8) are arranged on the top side, the inclined surfaces of the extrusion right-angle blocks (10) are in contact with the outer walls of the round rods (9), and the inclined surface positions between the extrusion right-angle blocks (10) beside the bottom blocks (6) and the extrusion right-angle blocks (10) beside the top blocks (8) are symmetrically arranged.

3. The strength detection device for plastic product production according to claim 1, wherein: Recessed grooves (17) are formed on the sides where the bottom blocks (6) and the top blocks (8) are away from each other. Three lower springs (18) are fixedly connected to the inner sides of the grooves (17). The other ends of the three lower springs (18) are fixedly connected to the inner side of the top frame (3) and the inner side of the adjustment cavity (5) respectively.

4. An intensity detection device for plastic product production according to claim 1, characterized in that: The limiting mechanism includes a limiting right-angle block (19) with an inclined surface. A sliding rod (21) is slidably connected through the side wall of the limiting block (20). The limiting right-angle block (19) is fixedly connected to the side wall of the sliding rod (21). An upper right-angle block (22) with an inclined surface is fixedly connected to the side wall of the limiting plate (15). The inclined surfaces of the upper right-angle block (22) and the limiting right-angle block (19) are arranged on the side close to each other. A lower right-angle block (23) with an inclined surface is slidably connected to the side wall of the limiting plate (15) behind the upper right-angle block (22). The inclined surface of the lower right-angle block (23) is symmetrically arranged with the inclined surface between the upper right-angle block (22).

5. The strength detection device for plastic product production according to claim 4, characterized in that: A limiting spring (24) is fixedly connected between the outer wall of the sliding rod (21) and the side wall of the limiting block (20). A sliding groove (25) is formed in the side wall of the limiting plate (15). A slider (26) is slidably connected inside the sliding groove (25). The slider (26) is fixedly connected to the side wall of the lower right-angle block (23). A reset spring (27) is fixedly connected between the side wall of the sliding groove (25) and the side wall of the slider (26).

6. The strength detection device for plastic product production according to claim 1, wherein: A plurality of anti-slip grooves (28) are equidistantly formed at the top end of the bottom block (6). Upper springs (16) are fixedly connected inside the U-shaped rods (12).

7. An intensity detection device for plastic product production according to claim 1, characterized in that: A T-shaped groove (29) is formed at the top end of the detection platform (4). A cylinder (30) is rotatably connected inside the T-shaped groove (29). A positioning plate (31) is fixedly connected to the side wall of the cylinder (30). A touch sensor (32) is fixedly connected through the side wall of the positioning plate (31). The touch sensor (32) is electrically connected to the hydraulic driving mechanism (2) through a controller. An elastic rope (33) is wound around the outer wall of the cylinder (30). One end of the elastic rope (33) is fixedly connected to the outer wall of the cylinder (30). The other end of the elastic rope (33) is fixedly connected to the top end of the limiting block (20) located in the adjustment cavity (5).

8. An intensity detection device for plastic product production according to claim 7, characterized in that: An upper limiting block (34) for limiting the downward flipping of the positioning plate (31) is fixedly connected to the bottom end of the T-shaped groove (29). A lower limiting block (35) for limiting the upward flipping position of the positioning plate (31) is fixedly connected inside the T-shaped groove (29) and beside the cylinder (30). A scroll spring (36) is arranged inside the cylinder (30). One end of the scroll spring (36) is fixedly connected to the inside of the cylinder (30). The other end of the scroll spring (36) is fixedly connected to the inside of the T-shaped groove (29).

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