Efficient rotational molding device

Abstract

The invention relates to the technical field of yoga ball forming equipment, in particular to an efficient rotational molding device. The technical problems that when a rotational molding mold rotates, resin-based plastic liquid can impact a ball mouth, so that the ball mouth is prone to falling off in the rotational molding process, a primarily-formed yoga ball is tightly attached to a bottom mold, the yoga ball is not prone to being stripped from the bottom mold, and therefore the production effect of the rotational molding device on the yoga ball is poor are solved. An efficient rotational molding device comprises a heating furnace, a rotating seat is rotatably connected to the heating furnace, a gear motor is fixedly connected to the heating furnace, and an output shaft of the gear motor is fixedly connected with the rotating seat. When the top mold is closed, the two sliding blocks with the strip-shaped grooves abut against the inner wall of the ball mouth, so that the ball mouth is better fixed while disassembly and assembly of the ball mouth are not affected, the ball mouth is not prone to falling off in the rotational molding process, and the stability of yoga ball production is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of yoga ball forming equipment, and particularly relates to a high-efficiency rotational molding device. BACKGROUND

[0002] A yoga ball is an inflatable elastic instrument widely used in the field of bodybuilding, which is usually made of PVC or other high polymer materials. In the production process, a ball nozzle is first installed in a bottom mold of a rotational molding mold, and plastic liquid is injected. Then, the rotational molding mold is heated and rotated to make the plastic liquid evenly adhere to the inner wall of the mold to form a hollow structure. Subsequently, the rotational molding mold is cooled to preliminarily form the yoga ball. Finally, the preliminarily formed yoga ball is taken out of the bottom mold of the rotational molding mold and sent to a shaping process, thereby completing the production of the yoga ball.

[0003] When the rotational molding mold is rotating, the plastic liquid will impact the ball nozzle. However, the current rotational molding device cannot better fix the ball nozzle without affecting the disassembly of the ball nozzle, which causes the ball nozzle to easily fall off during the rotational molding process. In addition, the preliminarily formed yoga ball is closely attached to the bottom mold. However, the current rotational molding device cannot make the yoga ball shrink to reduce the contact with the bottom mold, which causes the yoga ball to be not easy to peel off from the bottom mold, thereby reducing the production effect of the rotational molding device on the yoga ball. SUMMARY

[0004] In order to overcome the above-mentioned defects, the present application provides a high-efficiency rotational molding device, which can better fix the ball nozzle without affecting the disassembly of the ball nozzle, so that the ball nozzle is not easy to fall off during the rotational molding process, and the yoga ball can shrink to reduce the contact with the bottom mold, so that the yoga ball is more easy to peel off from the bottom mold, thereby enhancing the production effect of the rotational molding device on the yoga ball.

[0005] The technical scheme is as follows: a high-efficiency rotational molding device, comprising a heating furnace, a rotating seat connected to the heating furnace in a rotating manner, a speed reducer fixedly connected to the heating furnace, an output shaft of the speed reducer fixedly connected to the rotating seat, a forming mechanism arranged on the rotating seat, a driving mechanism arranged on the rotating seat, and a self-rotation mechanism arranged on the rotating seat.

[0006] Preferably, the forming mechanism comprises a rotating frame rotatably connected to the rotating seat, a bottom mold rotatably connected to the rotating frame, airflow channels arranged in the bottom mold and the rotating frame, the airflow channel of the bottom mold in communication with the airflow channel of the rotating frame, a top mold hingedly connected to the bottom mold, a top portion of the top mold provided with a bayonet, a ball nozzle mounting seat fixedly connected to the bottom mold, an opening arranged at a lower portion of the ball nozzle mounting seat, the opening of the ball nozzle mounting seat in communication with the airflow channel of the bottom mold, a screw rod rotatably connected to the bottom mold, and a nut threadedly connected to the screw rod.

[0007] Preferably, the driving mechanism comprises a servo motor fixed to the bottom of the rotating seat, a first gear fixed to the output shaft of the servo motor, and a first gear ring fixed to the bottom of the rotating frame.

[0008] Preferably, the self-rotation mechanism comprises a second gear ring fixed to the rotating seat, a support shell fixed to the rotating frame, a worm rotatably connected in the support shell, a worm wheel fixed to the bottom mold, the worm wheel meshing with the worm, a second gear fixed to the bottom end of the worm, and the second gear meshing with the second gear ring.

[0009] Preferably, the device further comprises a fixing mechanism arranged on the ball nozzle mounting seat, the fixing mechanism comprising a lifting column slidably connected in the ball nozzle mounting seat, the lifting column being hollow, air holes being formed in the upper and lower parts of the lifting column and communicating with the inside of the hollow column, a connecting frame fixed to the bottom mold, six limit wheels rotatably connected to the connecting frame, each two limit wheels close to each other forming a group, a cam fixed to the top mold, a guide sleeve fixed to the bottom of the ball nozzle mounting seat, a guide frame slidably connected to the guide sleeve, two guide grooves formed in the guide frame and slidably connected to the bottom of the lifting column, a tension spring connected between the guide frame and the guide sleeve, a steel wire rope connected between the top mold and the guide frame, the steel wire rope passing through the three groups of limit wheels, two sliding blocks slidably connected to the middle part of the ball nozzle mounting seat, two inclined grooves formed in each of the two sliding blocks and slidably connected to the lifting column.

[0010] Preferably, a plurality of strip grooves are formed in each of the two sliding blocks.

[0011] Preferably, the device further comprises a stripping mechanism arranged on the heating furnace, the stripping mechanism comprising a piston tube fixed to the heating furnace, a piston rod slidably connected in the piston tube, the piston rod being hollow and communicating with the inside of the piston tube, the piston rod being fixed to the rotating seat, a butt joint frame fixed to the bottom of the rotating seat, the butt joint frame rotatably connected to the rotating frame, the butt joint frame communicating with the airflow channel of the rotating frame, a connecting pipe connected between the butt joint frame and the piston rod, the connecting pipe respectively communicating with the piston rod and the butt joint frame, a first one-way valve arranged in the piston tube, and a second one-way valve arranged in the piston rod.

[0012] Preferably, the device further comprises a spraying frame fixed to the heating furnace, the spraying frame being provided with spray heads at both ends close to the top mold.

[0013] The device has the following advantages: 1. When the rotating seat drives the top mold and the bottom mold into the heating furnace, the rotating frame drives the bottom mold and the top mold to rotate, and the top mold and the bottom mold self-rotate, so that the top mold and the bottom mold are subjected to multi-dimensional rotation while being heated, the yoga ball is formed more uniformly, and the production effect of the rotational molding device on the yoga ball is enhanced.

[0014] 2. When the top mold is closed, two sliding blocks with slotted grooves abut against the inner wall of the nozzle, thereby better fixing the nozzle without affecting its disassembly and assembly. This makes the nozzle less likely to fall off during rotational molding, thus enhancing the stability of yoga ball production.

[0015] 3. By simultaneously extracting some air from the yoga ball when opening the top mold, the yoga ball shrinks and reduces its contact with the bottom mold, making it easier to peel the yoga ball off the bottom mold, thereby improving the production efficiency of the rotational molding device for yoga balls. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the molding mechanism of the present invention.

[0019] Figure 4 This is a cross-sectional three-dimensional structural schematic diagram of the molding mechanism of the present invention.

[0020] Figure 5 This is a partial three-dimensional structural schematic diagram of the molding mechanism of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the driving mechanism of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the self-rotating mechanism of the present invention.

[0023] Figure 8 This is a cross-sectional three-dimensional structural diagram of the rotation mechanism of the present invention.

[0024] Figure 9 This is a three-dimensional structural diagram of the fixing mechanism of the present invention.

[0025] Figure 10 This is a partial cross-sectional three-dimensional structural schematic diagram of the fixing mechanism of the present invention.

[0026] Figure 11 This is a schematic diagram of the disassembled three-dimensional structure of the fixing mechanism of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram of the peeling mechanism of the present invention.

[0028] Figure 13 This is a cross-sectional three-dimensional structural diagram of the peeling mechanism of the present invention.

[0029] Figure 14 For the present inventionFigure 13 A magnified three-dimensional structural diagram of A in the middle.

[0030] Figure 15 This is a schematic diagram of the partial splitting three-dimensional structure of the peeling mechanism of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1_Heating furnace, 2_Rotating seat, 3_Gear motor, 4_Forming mechanism, 41_Rotating frame, 42_Bottom mold, 43_Top mold, 44_Ball nozzle mounting seat, 45_Screw, 46_Nut, 5_Drive mechanism, 51_Servo motor, 52_First gear, 53_First gear ring, 6_Rotation mechanism, 61_Second gear ring, 62_Support shell, 63_Worm, 64_Worm wheel, 65_Second gear, 7_Fixing mechanism, 71_Lifting column, 72_Connecting frame, 721_Limiting wheel, 722_Wire rope, 723_Cam, 73_Guide sleeve, 74_Guide frame, 75_Tension spring, 76_Sliding block, 8_Peeling mechanism, 81_Piston tube, 82_Piston rod, 83_Connecting pipe, 84_Dating frame, 85_First one-way valve, 86_Second one-way valve, 9_Spraying frame. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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] Example 1: A high-efficiency rotational molding device, such as Figures 1-15 As shown, it includes a heating furnace 1, a rotating seat 2 rotatably connected to the heating furnace 1, a geared motor 3 connected to the heating furnace 1 by bolts, the output shaft of the geared motor 3 being connected to the rotating seat 2 by a keyway, a forming mechanism 4 being provided on the rotating seat 2, a driving mechanism 5 being provided on the rotating seat 2, and a self-rotation mechanism 6 being provided on the rotating seat 2.

[0034] The forming mechanism 4 includes a rotating frame 41, which is rotatably connected to a rotating base 2. A bottom mold 42 is rotatably connected to the rotating frame 41. Both the bottom mold 42 and the rotating frame 41 are provided with airflow channels. The airflow channel of the bottom mold 42 is connected to the airflow channel of the rotating frame 41. A top mold 43 is hinged to the bottom mold 42. The top of the top mold 43 is provided with a snap-fit. A heating furnace 1 is used to heat the bottom mold 42 and the top mold 43. A ball nozzle mounting seat 44 is welded inside the bottom mold 42. The ball nozzle mounting seat 44 has an opening at the bottom and is connected to the airflow channel of the bottom mold 42. The ball nozzle mounting seat 44 is used to install the ball nozzle of a yoga ball. A screw 45 is rotatably connected to the bottom mold 42. A nut 46 is threaded onto the screw 45. The nut 46 is used to fix the top mold 43 through the snap-fit ​​between the screw 45 and the top mold 43.

[0035] The drive mechanism 5 includes a servo motor 51, which is bolted to the bottom of the rotating base 2. A first gear 52 is connected to the output shaft of the servo motor 51 via a keyway. A first gear ring 53 is connected to the bottom of the rotating frame 41 via a keyway. The first gear 52 meshes with the first gear ring 53. The servo motor 51 drives the rotating frame 41 to rotate via the first gear 52 and the first gear ring 53.

[0036] The self-rotating mechanism 6 includes a second gear ring 61, which is bolted to the rotating seat 2. A support shell 62 is bolted to the rotating frame 41. A worm gear 63 is rotatably connected inside the support shell 62. A worm wheel 64 is connected to the bottom mold 42 via a keyway. The worm wheel 64 meshes with the worm gear 63. A second gear 65 is connected to the bottom end of the worm gear 63 via a keyway. The second gear 65 meshes with the second gear ring 61. The second gear ring 61 drives the bottom mold 42 to rotate through the second gear 65, the worm gear 63, and the worm wheel 64.

[0037] It also includes a spray frame 9, which is bolted to the heating furnace 1. Spray nozzles are provided on both ends of the spray frame 9 near the top mold 43. The spray frame 9 is used to spray water to cool the bottom mold 42 and the top mold 43 through the spray nozzles of the spray frame 9.

[0038] First, the operator connects the end of the spray frame 9 furthest from the top mold 43 to the water pump and starts the heating furnace 1. Then, the nozzle of the yoga ball is installed on the nozzle mounting seat 44. Next, a certain amount of molten plastic is injected into the bottom mold 42. After injection, the operator rotates the top mold 43 to make it fit against the bottom mold 42. Then, the screw 45 is rotated upwards to engage with the slot in the top mold 43. Next, the nut 46 is rotated downwards to press against the slot in the top mold 43, thus fixing the top mold 43 onto the bottom mold 42. Then, the operator starts the servo motor 51. The rotation of the output shaft of the servo motor 51 drives the first gear 52 to rotate, and the rotation of the first gear 52... The first gear ring 53 drives the rotating frame 41 to rotate, which in turn drives the bottom mold 42 and the top mold 43 to rotate. Simultaneously, the rotation of the rotating frame 41 causes the support shell 62 to move, causing the worm gear 63 inside the support shell 62 to rotate via the second gear 65 and the second gear ring 61. This rotation of the worm gear 63, through the worm wheel 64, drives the bottom mold 42 and the top mold 43 to rotate, ensuring uniform flow of the molten plastic within the top mold 43 and the bottom mold 42. Simultaneously, the operator controls the output shaft of the reduction motor 3 to rotate the rotating seat 2 upwards by a certain angle. This rotation of the rotating seat 2 causes the molding mechanism 4, the drive mechanism 5, and the rotation mechanism 6 to move together. After rotating upwards by a certain angle, the rotating seat 2 drives the top mold 43 and the bottom mold... 42 enters the heating furnace 1, causing the furnace 1 to heat the top mold 43 and bottom mold 42. Simultaneously, the rotating seat 2 blocks the furnace opening of the heating furnace 1, thus maintaining its temperature. In this way, as the rotating seat 2 carries the top mold 43 and bottom mold 42 into the heating furnace 1, the rotating frame 41 drives the bottom mold 42 and top mold 43 to rotate, and the top mold 43 and bottom mold 42 also rotate on their own axes. This multi-dimensional rotation of the top mold 43 and bottom mold 42 during heating results in more uniform shaping of the yoga ball, thereby enhancing the production effect of the rotational molding device. After heating the top mold 43 and bottom mold 42 for a certain period, the operator controls the output shaft of the reduction motor 3 to drive the rotating seat 2 to rotate in the opposite direction by a certain angle, causing the rotation... The rotating base 2 is reset, and then the servo motor 51 is turned off when the top mold 43 is at the top, so that the rotating frame 41, bottom mold 42 and top mold 43 no longer rotate. At the same time, the operator starts the water pump, so that water enters the spray frame 9 through the water pump. The water entering the spray frame 9 will be sprayed out of the two nozzles of the spray frame 9 towards the top mold 43 and bottom mold 42, thereby cooling the top mold 43 and bottom mold 42 and the yoga ball that is initially formed inside. After cooling is completed, the operator turns off the water pump and turns the nut 46 to reset it. Then, the screw 45 is turned downward to reset the screw 45. Immediately afterwards, the operator turns the top mold 43 upward to open it. Then the operator can take out the initially formed yoga ball from the bottom mold 42.

[0039] Example 2: Based on Example 1, such as Figures 1-15As shown, it also includes a fixing mechanism 7, which is mounted on the ball nozzle mounting base 44. The fixing mechanism 7 includes a lifting column 71, which is slidably connected to the ball nozzle mounting base 44. The lifting column 71 has a hollow structure, and both the upper and lower parts of the lifting column 71 have ventilation holes communicating with the interior of the hollow structure. A connecting frame 72 is bolted to the bottom mold 42, and six limit wheels 721 are rotatably connected to the connecting frame 72. Each pair of limit wheels 721 that are close to each other forms a group. A cam 723 is bolted to the top mold 43. A guide sleeve 73 is welded to the bottom of the ball nozzle mounting base 44, and a guide frame 74 is slidably connected to the guide sleeve 73. The guide frame 74 has two guide grooves. The guide slot is slidably connected to the bottom of the lifting column 71. The guide frame 74 drives the lifting column 71 to rise and fall through two guide slots. A tension spring 75 is connected between the guide frame 74 and the guide sleeve 73. A steel wire rope 722 is connected between the top mold 43 and the guide frame 74. The steel wire rope 722 passes through three sets of limit wheels 721. The limit wheels 721 are used to limit the steel wire rope 722. The top mold 43 and the cam 723 jointly pull the steel wire rope 722 to drive the guide frame 74 to move. Two sliding blocks 76 are slidably connected to the middle of the ball nozzle mounting seat 44. Two inclined slots are opened on each of the two sliding blocks 76. The inclined slots of the two sliding blocks 76 are slidably connected to the lifting column 71. The lifting column 71 drives the two sliding blocks 76 to abut against the inner wall of the ball nozzle through the inclined slots of the two sliding blocks 76.

[0040] Both sliding blocks 76 have several grooves, which increase the friction between the sliding blocks 76 and the ball nozzle.

[0041] When the operator closes the top mold 43, the top mold 43 pulls the wire rope 722. Simultaneously, the top mold 43 drives the cam 723 to rotate. The rotation of the cam 723 compresses the wire rope 722 outwards, causing the wire rope 722 to pull the guide frame 74 towards the connecting frame 72 under the control of multiple limit wheels 721. The tension spring 75 is stretched, causing the guide frame 74 to drive the lifting column 71 downwards through the guide groove. The downward movement of the lifting column 71 drives the two sliding blocks 76 to move away from each other through the inclined grooves of the two sliding blocks 76, causing the two sliding blocks 76 to abut against the inner wall of the ball nozzle. Thus, when the top mold 43 is closed, the two sliding blocks with the slotted grooves... The moving block 76 abuts against the inner wall of the nozzle, thus better fixing the nozzle without affecting its disassembly and assembly, making it less likely to fall off during rotational molding, thereby enhancing the stability of yoga ball production. After the yoga ball is initially formed, the operator opens the top mold 43, causing the top mold 43 to reset and no longer pull the wire rope 722. The cam 723 resets and no longer squeezes the wire rope 722. The tension spring 75 resets, driving the guide frame 74 and the wire rope 722 to reset. The reset of the guide frame 74 will drive the lifting column 71 to reset, causing the two sliding blocks 76 to reset. After the two sliding blocks 76 are reset, they no longer abut against the inner wall of the nozzle, making it easier to remove the initially formed yoga ball from the bottom mold 42.

[0042] Example 3: Based on Example 2, such as Figures 1-15 As shown, it also includes a peeling mechanism 8, which is mounted on the heating furnace 1. The peeling mechanism 8 includes a piston tube 81, which is bolted to the heating furnace 1. A piston rod 82 is slidably connected inside the piston tube 81. The piston rod 82 has a hollow structure and is connected to the interior of the piston tube 81. The piston rod 82 is bolted to the rotating seat 2. A docking frame 84 is bolted to the bottom of the rotating seat 2. The docking frame 84 is rotatably connected to the rotating frame 41. The airflow channel of the docking frame 84 is connected to the airflow channel of the rotating frame 41. A connecting pipe 83 is connected between the docking frame 84 and the piston rod 82. The connecting pipe 83 is connected to both the piston rod 82 and the docking frame 84. A first one-way valve 85 is installed inside the piston tube 81, and a second one-way valve 86 is installed inside the piston rod 82.

[0043] Initially, the lower vent of the lifting column 71 is connected to the opening of the ball nozzle mounting seat 44, and the upper vent of the lifting column 71 is connected to the interior of the bottom mold 42. When the top mold 43 is closed, the lifting column 71 moves downward, so that the lower vent of the lifting column 71 is no longer connected to the opening of the ball nozzle mounting seat 44. At the same time, the ball nozzle mounting seat 44 blocks the upper vent of the lifting column 71. When the rotating seat 2 rotates upward, it drives the piston rod 82 to compress the air in the piston tube 81, causing the air in the piston tube 81 to be discharged through the first one-way valve 85. When the rotating seat 2 rotates downward, it drives the piston rod 82 to reset. The reset of the piston rod 82 creates a negative pressure in the piston tube 81. When the top mold 43 is opened, the lifting column 71 resets, allowing the lifting column 71 to... The lower vent is connected to the opening of the ball nozzle mounting seat 44 again, and the upper vent of the lifting column 71 is connected to the inside of the bottom mold 42 again. The negative pressure in the piston tube 81 extracts some of the air from the initially formed yoga ball through the hollow piston rod 82, the second one-way valve 86, the connecting pipe 83, the docking frame 84, the airflow channel of the rotating frame 41, the airflow channel of the bottom mold 42, the opening of the ball nozzle mounting seat 44, the lower vent of the lifting column 71, and the upper vent of the lifting column 71. In this way, by simultaneously extracting some of the air from the yoga ball when the top mold 43 is opened, the yoga ball shrinks and reduces its contact with the bottom mold 42, making it easier to peel the yoga ball off the bottom mold 42, thereby improving the production efficiency of the rotational molding device for yoga balls.

[0044] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A high-efficiency rotational molding device, characterized in that, It includes a heating furnace (1), a rotating seat (2) rotatably connected to the heating furnace (1), a geared motor (3) fixedly connected to the heating furnace (1), the output shaft of the geared motor (3) fixedly connected to the rotating seat (2), a forming mechanism (4) provided on the rotating seat (2), a driving mechanism (5) provided on the rotating seat (2), and a self-rotation mechanism (6) provided on the rotating seat (2).

2. The high-efficiency rotational molding device according to claim 1, characterized in that, The forming mechanism (4) includes a rotating frame (41), which is rotatably connected to the rotating seat (2). A bottom mold (42) is rotatably connected to the rotating frame (41). Both the bottom mold (42) and the rotating frame (41) are provided with airflow channels. The airflow channel of the bottom mold (42) is connected to the airflow channel of the rotating frame (41). A top mold (43) is hinged to the bottom mold (42). A slot is provided at the top of the top mold (43). A ball nozzle mounting seat (44) is fixedly connected inside the bottom mold (42). An opening is provided at the bottom of the ball nozzle mounting seat (44). The opening of the ball nozzle mounting seat (44) is connected to the airflow channel of the bottom mold (42). A screw (45) is rotatably connected to the bottom mold (42). A nut (46) is threaded onto the screw (45).

3. The high-efficiency rotational molding device according to claim 2, characterized in that, The drive mechanism (5) includes a servo motor (51), which is fixed to the bottom of the rotating seat (2). A first gear (52) is fixed to the output shaft of the servo motor (51), and a first gear ring (53) is fixed to the bottom of the rotating frame (41). The first gear (52) meshes with the first gear ring (53).

4. The high-efficiency rotational molding device according to claim 3, characterized in that, The self-rotating mechanism (6) includes a second gear ring (61), which is fixedly connected to the rotating seat (2). A support shell (62) is fixedly connected to the rotating frame (41). A worm gear (63) is rotatably connected inside the support shell (62). A worm wheel (64) is fixedly connected to the bottom mold (42). The worm wheel (64) meshes with the worm gear (63). A second gear (65) is fixedly connected to the bottom end of the worm gear (63). The second gear (65) meshes with the second gear ring (61).

5. The high-efficiency rotational molding device according to claim 4, characterized in that, It also includes a fixing mechanism (7), which is located on the ball nozzle mounting seat (44). The fixing mechanism (7) includes a lifting column (71), which is slidably connected to the ball nozzle mounting seat (44). The lifting column (71) is a hollow structure. Ventilation holes communicating with the interior of the hollow lifting column (71) are opened at the upper and lower parts of the lifting column (71). A connecting frame (72) is fixedly connected to the bottom mold (42). Six limiting wheels (721) are rotatably connected to the connecting frame (72). Each pair of limiting wheels (721) that are close to each other is a group. A cam (723) is fixedly connected to the top mold (43). The bottom of the ball nozzle mounting seat (44) is fixedly connected to... There is a guide sleeve (73), and a guide frame (74) is slidably connected to the guide sleeve (73). Two guide grooves are opened on the guide frame (74). The two guide grooves of the guide frame (74) are slidably connected to the bottom of the lifting column (71). A tension spring (75) is connected between the guide frame (74) and the guide sleeve (73). A wire rope (722) is connected between the top mold (43) and the guide frame (74). The wire rope (722) passes through three sets of limit wheels (721). Two sliding blocks (76) are slidably connected to the middle of the ball nozzle mounting seat (44). Two inclined grooves are opened on each of the two sliding blocks (76). The inclined grooves of the two sliding blocks (76) are slidably connected to the lifting column (71).

6. The high-efficiency rotational molding apparatus according to claim 5, characterized in that, Both sliding blocks (76) have several strip grooves.

7. The high-efficiency rotational molding apparatus according to claim 5, characterized in that, It also includes a peeling mechanism (8), which is mounted on a heating furnace (1). The peeling mechanism (8) includes a piston tube (81), which is fixedly connected to the heating furnace (1). A piston rod (82) is slidably connected inside the piston tube (81). The piston rod (82) is hollow and communicates with the inside of the piston tube (81). The piston rod (82) is fixedly connected to a rotating seat (2). A docking frame (84) is fixedly connected to the bottom of the rotating seat (2). The docking frame (84) is rotatably connected to the rotating frame (41). The airflow channels of the docking frame (84) and the rotating frame (41) are connected. A connecting pipe (83) is connected between the docking frame (84) and the piston rod (82). The connecting pipe (83) communicates with the piston rod (82) and the docking frame (84) respectively. A first one-way valve (85) is installed inside the piston tube (81), and a second one-way valve (86) is installed inside the piston rod (82).

8. The high-efficiency rotational molding apparatus according to claim 7, characterized in that, It also includes a spray rack (9), which is fixed to the heating furnace (1). Spray nozzles are provided on both ends of the spray rack (9) near the top mold (43).

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