Anti-cracking stretching device for plastic toy

Abstract

This invention discloses a crack-resistant stretching device for plastic toys, belonging to the technical field of plastic product testing devices. It includes: a base plate, with semi-boxes forming a sealed space movably connected to both sides of the top of the base plate via electric slide rails; and a stretching clamping mechanism, comprising push cylinders fixed to both sides of the top of the base plate, piston rods of the push cylinders extending to a telescopic part, one end of which is fixedly connected to a movable frame via an insertion connection. The movable frame and a fixed block on the base plate are connected by a first spring. This invention solves the technical problems of inefficiently performing multi-angle, multi-directional stretching tests on plastic toys, the tendency for cracking due to varying forces during stretching, and the lack of protection against the influence of air temperature and humidity during the stretching test.

Description

Technical Field

[0001] This invention belongs to the technical field of plastic product testing devices, specifically relating to a crack-resistant stretching device for plastic toys. Background Technology

[0002] Definition of plastics: mainly composed of carbon, oxygen, hydrogen, nitrogen, and other organic or inorganic elements, finished products are solids, but during manufacturing, they are molten liquids. Therefore, they can be melted by heating, flowed by applying pressure, and solidified by cooling to form various shapes. This vast and diverse group of materials is called plastics. Plastics are plastic materials formed by processing high molecular weight synthetic resins as the main component, adding appropriate additives such as plasticizers, stabilizers, flame retardants, lubricants, colorants, etc., or rigid materials formed by curing and cross-linking. The raw materials of plastic toys are high molecular weight synthetic resins as the main component, with various auxiliary materials or additives added. Under specific temperature and pressure, they have plasticity and fluidity, can be molded into a certain shape, and maintain their shape under certain conditions.

[0003] Tensile testing machines, also known as material tensile testing machines or universal tensile strength testing machines, are a new generation of mechanical testing equipment that integrates computer control, automatic measurement, data acquisition, screen display, and test result processing. They are mainly suitable for testing metallic and non-metallic materials, such as rubber, plastics, wires and cables, optical fibers and cables, safety belts, seat belts, leather belts, composite materials, plastic profiles, waterproof membranes, steel pipes, copper materials, profiles, spring steel, bearing steel, stainless steel, castings, steel plates, steel strips, and non-ferrous metal wires, performing various tests such as tensile, compression, bending, shearing, peeling, tearing, and two-point extension.

[0004] During the stretching process of plastic toys, the product is often only stretched in one direction, which cannot effectively achieve the stretching test of multiple sides of the plastic toy. If the plastic toy is stretched in multiple directions at the same time, it is easy to cause uneven stress, which may cause some parts to crack. Moreover, the test environment during the stretching process has high requirements for the temperature and humidity of the air. It is necessary to control the temperature and humidity within a reasonable standard range, but the existing test environment often fails to meet the corresponding requirements, thus affecting the accuracy and reliability of the stretching test results. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic toy anti-cracking stretching device to solve the technical problems of not being able to efficiently achieve multi-angle and multi-directional stretching detection of plastic toys, the tendency for cracking to occur due to different forces during stretching, and the lack of protection against the influence of air temperature and humidity factors during the stretching detection process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A crack-resistant stretching device for plastic toys, comprising:

[0008] The base plate has a semi-box body that can form a sealed space, which is movably connected to both sides of the top of the base plate via electric slide rails.

[0009] A tension clamping mechanism includes push cylinders fixed on both sides of the top of the base plate. The piston rod on the push cylinder extends to the telescopic part. One end of the telescopic part is connected to the movable frame by a plug-in fixed method. The movable frame and the fixed block on the base plate are connected by a first spring. The piston rod on the push cylinder and the first telescopic rods at both ends of the movable frame are connected by a first swing rod.

[0010] The top of the movable frame and the first telescopic rod are both connected to a U-shaped plate via a bracket. The top of the U-shaped plate is respectively connected to a first clamping cylinder and a second clamping cylinder. The piston rods of the first clamping cylinder and the second clamping cylinder pass through the U-shaped plate and extend to the clamping plate. One end of the first telescopic rod is connected to a guide limiting component placed between the fixed block and the movable frame via a bending rod.

[0011] Furthermore, the guide limiting assembly includes a slider fixed on the bending rod. One end of the slider is connected to a groove along the length of the outer wall of the fixed block, and the other end is connected to the abutment plate by a second spring. The outer wall of the abutment plate is connected to an X-axis contact part near the movable frame, and one end of the abutment plate is connected to a Y-axis contact part that contacts the movable frame through an inclined surface. A guide groove is formed between the Y-axis contact parts and placed on the outer wall of the movable frame.

[0012] Furthermore, a positioning hole is provided at the connection between the bending rod and the slider, and a positioning pin is used to lock and fix them. Rounded corners are connected at both ends of the outer wall of the movable frame near the inclined surface.

[0013] Furthermore, both ends of the first swing rod are mounted on the piston rod and the first telescopic rod on the push cylinder by means of rotational connection. The piston rod on the push cylinder is provided with a strip groove that is movably connected to the telescopic part. A clamping cavity is formed between the bottom of the inner wall of the clamping plate and the U-shaped plate.

[0014] Furthermore, it also includes a temperature and humidity control mechanism, which includes a frame fixed on a base plate. A drive motor is mounted on the top of the frame via a column. The output shaft of the drive motor extends to a turntable. A central shaft on the turntable is connected to a ring array of blades, and a fixing ring is connected to the outer wall of the turntable via a positioning shaft. A guide groove connected to the blades is provided on the fixing ring.

[0015] Furthermore, the protrusions at both ends of the outer wall of the fixed ring and the second telescopic rod are connected by a second swing rod. One end of the second telescopic rod is connected to a baffle plate placed at the upper and lower ends of the opening. The baffle plate is connected to a storage groove along the height direction of the opening of the half box. The top of the frame is provided with a guide ring connected to the output shaft of the drive motor. The inner edge of the guide ring is provided with a rotating groove connected to the output shaft of the drive motor.

[0016] Furthermore, both ends of the second swing rod are mounted on the fixed ring and the second telescopic rod by means of a rotatable connection. As the drive motor starts, the blades rotate to dissipate heat and dehumidify, and at the same time, the opening on the half-box body closes or opens accordingly.

[0017] Furthermore, the horizontal central axis of the piston rod on the pushing cylinder and the horizontal central axis of the telescopic part are on the same axis, and the inner walls of the piston rod on the pushing cylinder are provided with limiting recesses on both sides connected to the telescopic part. The first clamping cylinders at both ends of the first telescopic rod are symmetrically arranged with respect to the center of the second clamping cylinder.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] A tension clamping mechanism is installed. The first clamping cylinder, in conjunction with a U-shaped plate, clamps and fixes the corners of the plastic toy. The second clamping cylinder, also in conjunction with a U-shaped plate, clamps and fixes the two ends of the outer wall of the plastic toy. During the pushing process, the push cylinder drives the piston rods at both ends to move outward. Combined with the rotational connection of the first swing rod, the first telescopic rods at both ends of the movable frame can move outward simultaneously. In this way, the clamping plate on the first clamping cylinder can drive the plastic toy to perform a stretching action in the Y-axis direction. As the piston rod on the push cylinder continues to push, it can abut against the movable frame at the telescopic part and push the movable frame to move outward. During the movement of the movable frame, the clamping plate on the second clamping cylinder can perform a stretching action in the X-axis direction on the plastic toy. At this time, the first clamping cylinder on the first telescopic rod does not perform a stretching action in the X-axis direction, thereby preventing the phenomenon of uneven stress caused by stretching action in multiple directions, which may make some parts prone to stretching and cracking. This ensures the stability and reliability of the tensile test.

[0020] The guide and limit assembly is designed so that during the outward movement of the first telescopic rod, the slider on the bending rod moves synchronously. This allows the slider to place the Y-axis contact part on the contact plate onto the outer wall of the movable frame, thus providing effective guidance and limiting for the subsequent movement of the movable frame towards the fixed block and preventing positional deviation during movement. Furthermore, during the centering movement of the slider towards the center of the fixed block, i.e., during the pullback process of the movable frame driven by the cylinder, the inclined surface, in conjunction with the second spring, can place the X-axis contact part on the slider onto the side wall of the movable frame, thereby providing contact and contact with the movable frame and helping the slider return to its original position. Combined with the first spring, this provides good buffering, adjustment, and clamping limiting effects, ensuring the accuracy of the transmission component's movement.

[0021] (3) A temperature and humidity control mechanism is set up. During the movement of the half-box on the electric slide rail, it can form a closed space, which can effectively play a role in dust prevention. In order to further regulate the temperature and humidity in the space, the drive motor is started and the turntable is driven to rotate at the same time. During the movement of the turntable, the power will be transmitted to the fixed ring and make it rotate synchronously. In addition, during the movement of the turntable, the blade can be driven to rotate. Moreover, with the help of the rotation connection of the second swing rod, the two end baffles on the second telescopic rod can be driven to move up and down in the opposite direction. During the movement of the baffles, the opening of the half-box can be opened or closed, so that heat and moisture can be discharged. After the second drive motor stops, the opening can be closed through the transmission component, thereby ensuring the sealing of the tensile environment. The design is reasonable, the integrated structural design has strong performance, and it improves the work efficiency and the stability of the tensile testing work. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a plastic toy anti-cracking stretching device according to the present invention;

[0024] Figure 2 This is an internal schematic diagram of an anti-cracking and stretching device for plastic toys according to the present invention. Figure 1 ;

[0025] Figure 3 This is an internal schematic diagram of an anti-cracking and stretching device for plastic toys according to the present invention. Figure 2 ;

[0026] Figure 4This is a front view of the internal direction of a plastic toy anti-cracking stretching device according to the present invention;

[0027] Figure 5 This is the present invention. Figure 2 Enlarged view of point A;

[0028] Figure 6 This is a schematic diagram of the structure of the limiting and guiding component of the present invention;

[0029] Figure 7 This is the present invention. Figure 2 Enlarged view of point B;

[0030] Figure 8 This is a schematic diagram showing the connection between the turntable and the fixed ring of the present invention.

[0031] Reference numerals: 1. Base plate; 2. Electric slide rail; 3. Half-box body; 4. Tension clamping mechanism; 5. Push cylinder; 6. Telescopic part; 7. Movable frame; 8. Fixed block; 9. First spring; 10. First telescopic rod; 11. First swing rod; 12. U-shaped plate; 13. First clamping cylinder; 14. Second clamping cylinder; 15. Clamping plate; 16. Bending rod; 17. Guide limit assembly; 18. Slider; 19. Second spring; 20. Contact plate; 21. X-axis contact part; 22. Inclined surface; 23. Y-axis contact part; 24. Temperature and humidity adjustment mechanism; 25. Frame; 26. Drive motor; 27. Turntable; 28. Blade; 29. ​​Positioning shaft; 30. Fixed ring; 31. Second telescopic rod; 32. Second swing rod; 33. Baffle plate; 34. Guide ring; 35. Rotating groove. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Reference manual attached Figure 1 and attached Figure 2 As shown, a crack-resistant stretching device for plastic toys includes:

[0034] The base plate 1 has a semi-box 3 that can form a sealed space, which is movably connected to both sides of the top of the base plate 1 via electric slide rails 2; the tension clamping mechanism 4 includes a push cylinder 5 fixed to both sides of the top of the base plate 1, the piston rod on the push cylinder 5 extends to the telescopic part 6, one end of the telescopic part 6 is fixedly connected to the movable frame 7 by plugging, the movable frame 7 and the fixed block 8 on the base plate 1 are connected by a first spring 9, and the piston rod on the push cylinder 5 and the first telescopic rods 10 at both ends of the movable frame 7 are connected by a first swing rod 11;

[0035] The top of both the movable frame 7 and the first telescopic rod 10 are connected to a U-shaped plate 12 via a bracket. The top of the U-shaped plate 12 is respectively connected to a first clamping cylinder 13 and a second clamping cylinder 14. The piston rods of the first clamping cylinder 13 and the second clamping cylinder 14 pass through the U-shaped plate 12 and extend to the clamping plate 15. One end of the first telescopic rod 10 is connected to a guide limiting assembly 17 placed between the fixed block 8 and the movable frame 7 via a bending rod 16.

[0036] Specifically, the electric slide rail 2 is driven by power supply of electrical energy, which is converted into mechanical energy to drive the movement of the slide rail. The corresponding drive mechanism is a conventional technical means for those skilled in the art, and will not be described in detail here, but it does not affect the effective implementation of the technical solution of this patent.

[0037] Extending this further, the electric slide rail 2 can also move the half-box 3 in a centered manner through a screw drive or cylinder push, thereby forming a relatively enclosed space within the entire box. Moreover, a guide post can be added to one half-box 3, and a guide groove adapted to the guide post can be set on the other half-box 3. This allows the half-box 3 to achieve precise alignment during the centered movement process.

[0038] The telescopic part 6 between the piston rod on the push cylinder 5 and the movable frame 7 essentially functions as a guide post. The piston rod on the push cylinder 5 has a slotted groove connected to the telescopic part, facilitating free movement of the piston rod on the telescopic part 6. One end of the telescopic part 6 is fixedly connected to the movable frame 7, while the other end is movably connected to the inner wall of the piston rod. This arrangement ensures that during the initial movement of the piston rod driven by the push cylinder 5, it does not collide with the movable frame 7, keeping the movable frame 7 relatively stationary. During the initial outward movement of the piston rod on the push cylinder 5, the... With the help of the rotational connection of the first swing rod 11, the first telescopic rods 10 at both ends of the movable frame 7 can move in opposite directions toward the Y-axis in the horizontal direction. This allows the first clamping cylinder 13 to stretch the plastic toy in the Y-axis direction. During the movement of the first telescopic rod 10, the Y-axis contact part 23 on the contact plate 20 can contact the outer wall of the movable frame 7. When the piston rod on the cylinder 5 is pushed to move onto the movable frame 7 through the telescopic part 6 and pushes the movable frame to move synchronously, the Y-axis contact part 23 on the contact plate 20 can play an effective limiting and guiding role.

[0039] A tension clamping mechanism 4 is provided. The first clamping cylinder 13, in conjunction with the U-shaped plate 12, can clamp and fix the corners of the plastic toy. The second clamping cylinder 14, in conjunction with the U-shaped plate 12, can clamp and fix the two ends of the outer wall of the plastic toy. During the pushing process, the pushing cylinder 5 can drive the piston rods at both ends to move outward. In conjunction with the rotational connection of the first swing rod 11, the first telescopic rods 10 at both ends of the movable frame 7 can move outward simultaneously. In this way, the clamping plate 15 on the first clamping cylinder 13 can drive the plastic toy to perform a stretching action in the Y-axis direction. As the piston rod on the cylinder 5 continues to push, it can move on the telescopic part 6 and abut against the movable frame 7, pushing the movable frame 7 to move outward. During the movement of the movable frame 7, the clamping plate 15 on the second clamping cylinder 14 can stretch the plastic toy in the X-axis direction. At this time, the first clamping cylinder 13 on the first telescopic rod 10 does not perform stretching movement in the X-axis direction, thereby preventing the phenomenon of different forces caused by stretching movements in multiple directions, which may make some parts easy to be stretched and cracked, thus ensuring the stability and reliability of the tensile test.

[0040] refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The guide limiting assembly 17 includes a slider 18 fixed on the bending rod 16. One end of the slider 18 is connected to a groove along the length of the outer wall of the fixed block 8, and the other end is connected to the contact plate 20 by a second spring 19. The outer wall of the contact plate 20 is connected to an X-axis contact portion 21 near the movable frame 7, and one end of the contact plate 20 is connected to a Y-axis contact portion 23 that contacts the movable frame 7 by an inclined surface 22. A guide groove is formed between the Y-axis contact portions 23 on the outer wall of the movable frame 7.

[0041] Specifically, a positioning hole is provided at the connection between the bending rod 16 and the slider 18, and a positioning pin is used to lock and fix them. Rounded corners are connected at both ends of the outer wall of the movable frame 7 near the inclined surface 22. The connection between the bending rod 16 and the slider 18 can be locked and fixed not only by the positioning pin, but also by the bolt assembly as needed, thereby quickly realizing the installation and connection of structural components, facilitating quick maintenance by personnel, and thus improving the work efficiency of personnel.

[0042] In addition, the rounded corners at the corners of the movable frame 7 can effectively increase the contact area during the collision with the contact plate 20, thereby reducing the applied pressure and thus effectively increasing the practical effect of the device.

[0043] With the guide limit component 17 in place, during the outward movement of the first telescopic rod 10, the slider 18 on the bending rod 16 can move synchronously. In this way, the slider 18 can drive the Y-axis contact part 23 on the contact plate 20 to be placed on the outer wall of the movable frame 7. This can effectively limit and guide the movable frame 7 when it moves towards the fixed block 8, preventing the movable frame 7 from deviating from its position during movement. In addition, during the process of the slider 18 moving towards the center of the fixed block 8, that is, during the process of the cylinder 5 driving the movable frame 7 to pull back, the inclined surface 22, in conjunction with the second spring 19, can place the X-axis contact part 21 on the slider 18 on the side wall of the movable frame 7, thereby providing a contact and contact effect on the movable frame 7. This can also help the slider 18 return to its original position. In conjunction with the first spring 9, it can play a good role in buffering adjustment and clamping limit, ensuring the accuracy of the movement of the transmission components.

[0044] Both ends of the first swing rod 11 are rotatably connected to the piston rod on the push cylinder 5 and the first telescopic rod 10. The piston rod on the push cylinder 5 has a strip groove that is movably connected to the telescopic part 6. A clamping cavity is formed between the bottom of the inner wall of the clamping plate 15 and the U-shaped plate 12. The first swing rod 11 is rotatably connected to the push cylinder 5 and the first telescopic rod 10. This design can convert the force of the push cylinder 5 in the Y-axis direction into the force of the first telescopic rod 10 moving in the opposite direction in the X-axis direction, thereby driving the first clamping cylinder 13 on the first telescopic rod 10 to move horizontally.

[0045] refer to Figure 1 , Figure 7 and Figure 8 A plastic toy anti-cracking stretching device also includes a temperature and humidity regulating mechanism 24. The temperature and humidity regulating mechanism 24 includes a frame 25 fixed on a base plate 1. A drive motor 26 is installed at the top of the frame 25 via a column. The output shaft of the drive motor 26 extends to a turntable 27. A ring array of blades 28 is connected to the central shaft of the turntable 27. A fixing ring 30 is connected to the outer wall of the turntable 27 via a positioning shaft 29. A guide groove connected to the blades 28 is provided on the fixing ring 30.

[0046] Specifically, the protrusions at both ends of the outer wall of the fixed ring 30 and the second telescopic rod 31 are connected by the second swing rod 32. One end of the second telescopic rod 31 is connected to a baffle plate 33 placed at the upper and lower ends of the opening. The baffle plate 33 is connected to a storage groove along the height direction of the opening of the half box 3. The top of the frame 25 is provided with a guide ring 34 connected to the output shaft of the drive motor 26. The inner edge of the guide ring 34 is provided with a rotating groove 35 connected to the output shaft of the drive motor 26.

[0047] When the device is not in use, the half-box 3 forms a relatively enclosed space, which can play a certain role in dust prevention. When the device is in use, the vents on the half-box 3 can be opened, which allows the ventilation and heat dissipation mechanism to perform normal exhaust work, and also provides corresponding space for the movement of the baffle 33.

[0048] Extending this further, since the baffle 33 can only move vertically in the storage slot, when the fixed ring 30 on the turntable 27 rotates, the second telescopic rod 31, in conjunction with the second swing rod 32, can convert the rotational force of the fixed ring 30 into the normal up-and-down movement of the baffle 33. During the up-and-down movement of the baffle 33, the opening of the half-box 3 can be opened or closed. Moreover, the second telescopic rod 31 can not only play the role of force transmission, but also ensure the normal movement of the half-box 3 on the electric slide rail 2.

[0049] The guide ring 34 on the frame 25 can provide corresponding support for the transmission components and ensure that the output shaft of the drive motor 26 can rotate freely. Moreover, the rotation groove 35 on the inner wall of the guide ring 34 is set in an annular concave shape, which can effectively prevent the output shaft of the drive motor 26 from deviating from its position when it rotates, thereby ensuring the stability of the device.

[0050] A temperature and humidity control mechanism 24 is installed. As the semi-box 3 moves on the electric slide rail 2, it forms a closed space, effectively preventing dust. To further regulate the temperature and humidity within the space, the drive motor 26 is started, simultaneously driving the turntable 27 to rotate. During the movement of the turntable 27, power is transmitted to the fixed ring 30, causing it to rotate synchronously. In addition, during the movement of the turntable 27, the blades 28 can rotate. Furthermore, with the help of the rotational connection of the second swing rod 32, the two end baffles 33 of the second telescopic rod 31 can move up and down in opposite directions. During the movement of the baffles 33, the opening of the semi-box 3 can be opened or closed, thereby expelling heat and moisture. After the drive motor 26 stops, the opening can be closed through the transmission component, ensuring the airtightness of the tensile environment. The design is reasonable, the integrated structure has strong performance, and it improves work efficiency and the stability of tensile testing.

[0051] Both ends of the second swing rod 32 are mounted on the fixed ring 30 and the second telescopic rod 31 by means of rotational connection. As the drive motor 26 starts, the blade 28 rotates to dissipate heat and dehumidify. At the same time, the opening on the half box 3 closes or opens. The horizontal central axis of the piston rod on the push cylinder 5 and the horizontal central axis of the telescopic part 6 are on the same axis. Both sides of the inner wall of the piston rod on the push cylinder 5 are provided with limiting recesses connected to the telescopic part 6. The first clamping cylinders 13 at both ends of the first telescopic rod 10 are symmetrically arranged with respect to the second clamping cylinder 14.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A crack-resistant stretching device for plastic toys, characterized in that, include: The bottom plate (1) has a semi-box (3) that can form a sealed space, which is movably connected to both sides of the top of the bottom plate (1) via electric slide rails (2). The tension clamping mechanism (4) includes a push cylinder (5) fixed on both sides of the top of the base plate (1). The piston rod on the push cylinder (5) extends to the telescopic part (6). One end of the telescopic part (6) is connected to the movable frame (7) by plug-in fixing. The movable frame (7) and the fixed block (8) on the base plate (1) are connected by a first spring (9). The piston rod on the push cylinder (5) and the first telescopic rods (10) at both ends of the movable frame (7) are connected by a first swing rod (11). Both ends of the first swing rod (11) are mounted on the piston rod and the first telescopic rod (10) of the push cylinder (5) by means of rotational connection. The piston rod of the push cylinder (5) is provided with a strip groove that is movably connected to the telescopic part (6). The top of the movable frame (7) and the first telescopic rod (10) are both connected to a U-shaped plate (12) via a bracket. The top of the U-shaped plate (12) is respectively connected to a first clamping cylinder (13) and a second clamping cylinder (14). The piston rods of the first clamping cylinder (13) and the second clamping cylinder (14) pass through the U-shaped plate (12) and extend to the clamping plate (15). One end of the first telescopic rod (10) is connected to a guide limiting assembly (17) placed between the fixed block (8) and the movable frame (7) via a bending rod (16). The guide limiting assembly (17) includes a slider (18) fixed on the bending rod (16). One end of the slider (18) is connected to a groove along the length of the outer wall of the fixed block (8), and the other end is connected to the contact plate (20) by a second spring (19). The outer wall of the contact plate (20) is connected to an X-axis contact part (21) near the movable frame (7), and one end of the contact plate (20) is connected to a Y-axis contact part (23) that contacts the movable frame (7) through an inclined surface (22). A guide groove is formed between the Y-axis contact parts (23) and placed on the outer wall of the movable frame (7).

2. The anti-cracking stretching device for plastic toys according to claim 1, characterized in that, The connection between the bending rod (16) and the slider (18) is provided with a positioning hole and is locked and fixed by a positioning pin. The corners at both ends of the outer wall of the movable frame (7) are connected with rounded corners near the inclined surface (22).

3. The anti-cracking stretching device for plastic toys according to claim 1, characterized in that, A clamping cavity is formed between the bottom of the inner wall of the clamping plate (15) and the U-shaped plate (12).

4. The anti-cracking stretching device for plastic toys according to claim 1, characterized in that, It also includes a temperature and humidity control mechanism (24), which includes a frame (25) fixed on the base plate (1). A drive motor (26) is mounted on the top of the frame (25) via a column. The output shaft of the drive motor (26) extends to the turntable (27). The central shaft of the turntable (27) is connected to a ring array of blades (28). The outer wall of the turntable (27) is connected to a fixing ring (30) via a positioning shaft (29). A guide groove connected to the blades (28) is provided on the fixing ring (30).

5. The anti-cracking stretching device for plastic toys according to claim 4, characterized in that, The protrusions at both ends of the outer wall of the fixed ring (30) and the second telescopic rod (31) are connected by the second swing rod (32). One end of the second telescopic rod (31) is connected to a baffle plate (33) placed at the upper and lower ends of the opening. The baffle plate (33) is connected to a storage groove along the height direction of the opening of the half box (3). The top of the frame (25) is provided with a guide ring (34) connected to the output shaft of the drive motor (26). The inner edge of the guide ring (34) is provided with a rotating groove (35) connected to the output shaft of the drive motor (26).

6. The anti-cracking stretching device for plastic toys according to claim 5, characterized in that, Both ends of the second swing rod (32) are mounted on the fixed ring (30) and the second telescopic rod (31) by means of rotational connection. As the drive motor (26) starts, the blade (28) rotates to dissipate heat and dehumidify, and at the same time the opening on the half box (3) closes or opens.

7. The anti-cracking stretching device for plastic toys according to claim 1, characterized in that, The horizontal central axis of the piston rod on the push cylinder (5) and the horizontal central axis of the telescopic part (6) are on the same axis, and the piston rod on the push cylinder (5) has a limiting notch on both sides connected to the telescopic part (6). The first clamping cylinder (13) at both ends of the first telescopic rod (10) is symmetrically arranged with respect to the center of the second clamping cylinder (14).

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