PU turntable machine

Abstract

The present invention discloses a PU turntable machine, comprising a supporting base, a turntable located above the supporting base, a central shaft extending upward and downward through the turntable and having its lower end mounted on the supporting base, a plurality of mold opening and closing mechanisms mounted on the turntable and spaced apart circumferentially therefrom, a plurality of PU molds having the same number of mold opening and closing mechanisms as the mold opening and closing mechanisms, and a turntable drive mechanism mounted on the supporting base. The PU molds are mounted on the mold opening and closing mechanisms, which are used to drive the PU molds to perform mold opening and closing movements. The turntable is driven by the turntable drive mechanism to rotate about the axis of the central shaft. The PU turntable machine of the present invention has the advantages of a simple structure, automatic mold opening, and high efficiency.

Description

Technical Field

[0001] The present invention relates to the field of shoe production, in particular to a PU turntable machine for producing PU soles. Background Art

[0002] As we all know, footwear products are generally formed by molds. This molding method can reduce production costs and improve production efficiency.

[0003] Among them, for the sole molding of the material being PU (polyurethane for short), the PU material is injected into a mold, the PU material is foamed and molded in the mold, and finally the mold is opened to obtain the completed PU sole.

[0004] In the existing PU sole production line, it consists of a waist-shaped conveyor line that rotates in a waist-shaped closed loop and a PU mold installed on the waist-shaped conveyor line. The PU mold is driven by the waist-shaped conveyor line to make a waist-shaped closed loop.

[0005] However, in existing PU sole production lines, the opening and closing of the PU molds on the waist-shaped conveyor line are manually performed by the operator; at the same time, the structure of the waist-shaped conveyor line that realizes the waist-shaped closed-loop circulation of the PU molds is relatively complex; in addition, the existing waist-shaped conveyor line maintains a large distance between the PU molds to ensure smooth transportation at corners.

[0006] Therefore, there is an urgent need for a PU turntable machine with a simple structure, automatic mold opening and closing, and a more compact spacing between PU molds to overcome the above-mentioned defects. Summary of the Invention

[0007] The object of the present invention is to provide a PU turntable machine with a simple structure, automatic mold opening and closing, and a more compact spacing between PU molds.

[0008] To achieve the above objectives, the PU turntable machine of the present invention comprises a supporting base, a turntable located above the supporting base, a central shaft extending vertically through the turntable and having its lower end mounted on the supporting base, a plurality of mold opening and closing mechanisms mounted on the turntable and spaced apart from each other in the circumferential direction of the turntable, a number of PU molds equal in number to the mold opening and closing mechanisms, and a turntable drive mechanism mounted on the supporting base. The PU molds are mounted on the mold opening and closing mechanisms, which are used to drive the PU molds to perform mold opening and closing movements, and the turntable rotates around the axis of the central shaft under the drive of the turntable drive mechanism.

[0009] Preferably, all the mold opening and closing mechanisms are arranged in a complete circle on the turntable, and the mold opening and closing mechanisms are also arranged adjacent to the outer edge of the turntable.

[0010] Preferably, the mold opening and closing mechanism includes a lower mold base, a flip upper mold base, a flip drive, a lifting drive, a locking assembly and a suspension mounting bracket located below the turntable, the upper end of the suspension mounting bracket is assembled on the turntable, the lifting drive is mounted on the suspension mounting bracket, the lower mold base is mounted on the output end of the lifting drive, and the lower mold base is lifted and slid up and down under the drive of the lifting drive, the flip upper mold base can be mounted on the turntable upside down and has a mold closing position to be flipped to the top of the lower mold base and a mold opening position to be flipped away from the lower mold base relative to the turntable, the flip drive is mounted on the turntable or the suspension mounting bracket and drives the flip upper mold base to switch between the mold closing position and the mold opening position, and the locking assembly is mounted on the turntable and is used to prevent the flip upper mold base in the mold closing position from switching to the mold opening position.

[0011] Preferably, the output end of the lifting drive is arranged upward, the flip drive is located beside the suspension mounting bracket, and the flip drive is also suspended below the turntable.

[0012] Preferably, the first side of the flip upper mold base is pivotally connected to the turntable by means of a pivot structure, the clamping assembly is located outside the second side opposite to the flip upper mold base, and the clamping assembly blocks and cooperates with the second side of the flip upper mold base in the mold closing position.

[0013] Preferably, the output end of the flipping driver is arranged upward, and a rack is installed on the output end of the flipping driver. A gear that meshes with the rack is fixedly mounted on the pivot structure. The rack is driven by the flipping driver to move up and down, and the gear is driven by the rack to flip together with the pivot structure and the flip upper mold base.

[0014] Preferably, the mold locking assembly includes a pivot shaft, a mold locking driver, and a first pivot hook and a second pivot hook each pivotally connected to the turntable, the pivot shaft and the pivot structure are parallel to each other, the pivot shaft is also located below the turntable, the first pivot hook and the second pivot hook are each fixed to the pivot shaft, the first pivot hook is also separated from the second pivot hook along the axial direction of the pivot shaft, the mold locking driver is installed on the turntable, the output end of the mold locking driver is assembled and connected to the pivot shaft, the mold locking driver drives the first pivot hook and the second pivot hook to simultaneously hook or detach from the second side of the flip upper mold base during the process of driving the pivot shaft to slide back and forth in the horizontal direction.

[0015] Preferably, the central shaft includes a hollow shaft body, a rotary joint and a sleeve that is sealed and fitted on the shaft body. The lower end of the shaft body is assembled on the bearing base. The turntable is fitted on the shaft body and is located below the sleeve. The sleeve and the shaft body together enclose a water outflow channel, a water return channel, an oil outflow channel and an oil return channel that are separated from each other. The sleeve is linked to the turntable through a connecting bracket so that the sleeve rotates around the shaft body along with the turntable. The sleeve is provided with a water outflow joint connected to the water outflow channel, a water return channel connected to the water return channel, and a A water return joint, an oil outflow joint connected to the oil outflow channel and an oil return joint connected to the oil return channel, the hollow part of the shaft body forms a central channel axially passing through the shaft body, the shaft body is also provided with a water input channel connected to the water outflow channel, an oil input channel connected to the oil outflow channel, a water output channel connected to the water return channel and an oil output channel connected to the oil return channel, the rotary joint is assembled at the upper end of the shaft body, the rotary joint is provided with an air channel and an electrical channel that are connected to the central channel and separated from each other.

[0016] Preferably, the central shaft also includes an intermediate connecting ring and an electric box turntable, the shaft sleeve includes a first shaft sleeve and a second shaft sleeve, the first shaft sleeve and the shaft body together enclose the water outflow channel and the water return channel, the second shaft sleeve and the shaft body together enclose the oil outflow channel and the oil return channel, the water outflow joint and the water return joint are located on the first shaft sleeve, the oil outflow joint and the oil return joint are located on the second shaft sleeve, one end of the intermediate connecting ring is detachably fixed to the first shaft sleeve by means of a first locking piece, and the other end of the intermediate connecting ring is detachably fixed to the second shaft sleeve by means of a second locking piece, the first shaft sleeve is linked to the turntable through the connecting bracket, and the electric box turntable is fixed to the upper end of the shaft sleeve and surrounds the rotating joint from all sides.

[0017] Preferably, the inner side wall of the first sleeve has a first convex ring, a second convex ring and a third convex ring that protrude toward the shaft body and are tightly fitted with the shaft body, the first convex ring, the second convex ring and the third convex ring are arranged in sequence from bottom to top along the shaft body, and a sealing ring is assembled between the first convex ring, the second convex ring and the third convex ring and the shaft body, one of the water outflow channel and the water return channel is located between the first convex ring and the second convex ring, and the other of the water outflow channel and the water return channel is located between the second convex ring and the third convex ring, and a rotating bearing arranged one above and one below is fitted between the inner side wall of the first sleeve and the shaft body, the upper rotating bearing is located above the third convex ring and axially abuts against the third convex ring, and the lower rotating bearing is located below the first convex ring and axially abuts against the first convex ring The cam is secured to the upper and lower surfaces of the second bearing capstan and are secured to the lower surfaces of the second bearing capstan.

[0018] Compared with the existing technology, the turntable is rotatably supported on the supporting base by means of the central axis, and then the turntable is driven by the turntable driving mechanism to rotate around the axis of the central axis. In this way, the turntable and the mold opening and closing mechanism on the turntable and the PU mold rotate around the axis of the central axis together, so it has the advantage of simple structure compared with the existing waist-shaped conveyor line; with the help of multiple mold opening and closing mechanisms spaced apart on the turntable along the circumference of the turntable, each mold opening and closing mechanism is responsible for the opening and closing movement of a corresponding PU mold, thereby realizing the purpose of automatic opening and closing of the PU mold. At the same time, because multiple mold opening and closing mechanisms are spaced apart on the turntable along the circumference of the turntable, the spacing between the mold opening and closing mechanisms can be made more compact, thereby making the spacing between the PU molds more compact, compared with the existing waist-shaped conveyor line, in order to ensure smooth transportation of the PU mold at the corner, the PU molds are kept at a larger distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the PU turntable machine of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the PU turntable machine of the present invention at another angle.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of a PU turntable machine of the present invention, in which a mold opening and closing mechanism equipped with a PU mold is installed on a part of the turntable and is in a mold closing state.

[0022] Figure 4 yes Figure 3 The three-dimensional structural diagram shown is when the mold locking assembly is in the unlocked state.

[0023] Figure 5 yes Figure 4 The three-dimensional structure diagram shown in the mold opening state.

[0024] Figure 6 yes Figure 5 The diagram shows the three-dimensional structure behind the hidden part of the turntable.

[0025] Figure 7 yes Figure 6 Schematic diagram of the three-dimensional structure at another angle.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the central axis of the PU turntable machine of the present invention behind the hidden electrical box turntable.

[0027] Figure 9 yes Figure 8 The center axis shown is a schematic diagram of the planar structure viewed from bottom to top.

[0028] Figure 10 It is along Figure 9 Schematic diagram of the internal structure after sectioning along the AA line.

[0029] Figure 11 It is along Figure 9 Schematic diagram of the internal structure after sectioning along the midline BB.

[0030] Figure 12 yes Figure 10 The structures shown are schematic diagrams of the internal structure after being assembled with part of the turntable and part of the bearing base. DETAILED DESCRIPTION

[0031] In order to explain the technical content and structural features of the present invention in detail, the following is a further description in conjunction with the embodiments and the accompanying drawings.

[0032] See also Figure 1 、 Figure 2 and Figure 5As shown, the PU turntable machine 1 of the present invention includes a central shaft 100, a supporting base 200, a turntable 300 located above the supporting base 200, 36 mold opening and closing mechanisms 400 assembled on the turntable 300 and spaced apart from each other in the circumferential direction of the turntable 300, PU molds 500 of the same number as the mold opening and closing mechanisms 400, and a turntable drive mechanism (not shown) assembled on the supporting base 200. The central shaft 100 is placed in the turntable 300 from top to bottom, and the lower end of the central shaft 100 is assembled on the supporting base 200, which provides support and fixation for the central shaft 100. Figure 12 As shown; preferably, the supporting base 200 is in a "Y" shape. Such an arrangement not only ensures the reliability of the supporting base 200 in supporting the central shaft 100, but also reduces the use of materials, but is not limited to this. The PU mold 500 is assembled on the mold opening and closing mechanism 400, and the mold opening and closing mechanism 400 drives the PU mold 400 to open and close the mold to meet the opening and closing needs of the PU mold 400. The turntable 300 rotates around the axis C of the central shaft 100 (see Figure 12 ) rotates so that any mold opening and closing mechanism 400 on the turntable 300 and the PU mold 500 on the mold opening and closing mechanism 400 can perform periodic rotational motion, thereby meeting periodic production needs. Figure 1 In the embodiment, all the mold opening and closing mechanisms 400 are arranged in a complete circle on the turntable 300, and the mold opening and closing mechanisms 400 are also located adjacent to the outer edge 300a of the turntable 300. This arrangement can effectively utilize the radial dimension of the turntable 300 and increase the number of mold opening and closing mechanisms 400 arranged on the turntable 300. It should be noted that in other embodiments, the number of mold opening and closing mechanisms 400 can also vary from 10, 15, 20, 25, 30, 35, 40, or 45. It is a flexible choice based on actual needs and is not limited to the above description. More specifically, as follows:

[0033] Combine Figures 3 to 7The mold opening and closing mechanism 400 includes a lower mold base 410, a flip upper mold base 420, a flip actuator 430, a lifting actuator 440, a mold clamping assembly 450, and a suspension mounting bracket 460 located below the turntable 300. The upper end of the suspension mounting bracket 460 is assembled to the turntable 300, so that the suspension mounting bracket 460 is suspended below the turntable 300, thereby effectively utilizing the space below the turntable 300. The lifting drive 440 is mounted on the suspension mounting bracket 460, which provides fixed support for the lifting drive 440 and prevents the lifting drive 440 from occupying the space above the turntable 300 due to being directly mounted on the turntable 300. Preferably, the output end 441 of the lifting drive 440 is arranged upward, and the lower mold base 410 is mounted on the output end 441 of the lifting drive 440. This arrangement makes the assembly connection between the output end 441 of the lifting drive 440 and the lower mold base 410 more reasonable, reducing the space occupied by the two. For example, the lifting drive 440 is an oil cylinder to provide greater lifting power. Of course, according to actual needs, a cylinder with smaller lifting power can also be selected, so it is not limited to this. The lower mold base 410 is driven by the lifting drive 440 to move up and down. The flip upper mold base 420 can be mounted on the turntable 300 in an upside-down manner and has a mold closing position that is flipped to the top of the lower mold base 410 relative to the turntable 300 (see the status). Figure 3 or Figure 4 As shown) and flipped to the mold opening position away from the lower mold base 410 (status see Figure 5 As shown). The flip driver 430 is mounted on the turntable 300, and the turntable 300 provides support and fixation for the flip driver 430; preferably, the flip driver 430 is located on the side of the suspension mounting bracket 460, and the flip driver 430 is also suspended below the turntable 300 to effectively utilize the space below the turntable 300; of course, in other embodiments, the flip driver 430 can also be mounted on the suspension mounting bracket 460, so it is not limited to this; the flip driver 430 is used to drive the flip upper mold base 420 to switch between the mold closing position and the mold opening position. The mold locking assembly 450 is mounted on the turntable 300 and is used to block the flip upper mold base 420 in the mold closing position from switching to the mold opening position to improve the reliability of the mold closing of the PU mold 500. Specifically, in Figures 3 to 7In order to reduce the flipping space occupied by the flipping upper mold base 420 when flipping up and down, the first side 421 of the flipping upper mold base 420 is pivotally connected to the turntable 300 by means of a pivot structure 423. Preferably, the pivot structures 423 are respectively arranged at the two opposite ends of the first side 421 of the flipping upper mold base 420, and all the pivot structures 423 are aligned with each other in the axial direction. This can increase the reliability of the pivotal assembly between the flipping upper mold base 420 and the turntable 300, but is not limited to this. The clamping assembly 450 is located outside the second side 422 opposite to the flipping upper mold base 420. The clamping assembly 450 blocks and cooperates with the second side 422 of the flipping upper mold base 420 in the mold closing position to improve the reliability of the clamping assembly 450 in locking the flipping upper mold base 420. See the status. Figure 3 It should be noted that the PU mold 500 includes an upper mold 510 and a lower mold 520. The upper mold 510 is mounted on the flip upper mold base 420, and the lower mold 520 is mounted on the lower mold base 410. Therefore, when the flip upper mold base 420 switches between the mold opening position and the mold closing position, the upper mold 510 switches between the mold opening position and the mold closing position together with the flip upper mold base 420. Similarly, when the lifting driver 440 drives the lower mold base 410 to move up and down, the lower mold 520 moves up and down together with the lower mold base 410 to meet the movement requirements of product molding and product removal.

[0034] like Figure 7 As shown, the output end 431 of the flip actuator 430 is arranged upward. A rack 470 is mounted on the output end 431 of the flip actuator 430. A gear 480 is fixedly mounted on the pivot structure 423 and meshes with the rack 470. The rack 470 is driven by the flip actuator 430 to move up and down. The upward and downward sliding rack 470 drives the gear 480, the pivot structure 423, and the flip upper mold base 420 to rotate together, thereby simplifying the structure of the flip actuator 430 driving the flip upper mold base 420. For example, to increase the switching speed between the mold opening position and the mold closing position of the flip upper mold base 420 and the upper mold 510, the flip actuator 430 is a pneumatic cylinder or an oil cylinder. Of course, according to actual needs, the flip actuator 430 can also be other actuators, so this is not limited to this.

[0035] like Figure 6 and Figure 7As shown, the mold clamping assembly 450 includes a pivot shaft 451, a mold clamping driver 452, and a first pivoting hook 453 and a second pivoting hook 454, each pivotally connected to the turntable 300. The pivot shaft 451 is parallel to the pivot structure 423 and is located below the turntable 300 to effectively utilize the space below the turntable 300. The first pivoting hook 453 and the second pivoting hook 454 are each fixed to the pivot shaft 451, thereby securing them together. The first pivoting hook 453 is also spaced apart from the second pivoting hook 454 along the axial direction of the pivot shaft 451, so that the first pivoting hook 453 and the second pivoting hook 454 together form a structure that locks the second side 422 of the flip upper mold base 420 from multiple positions. The mold locking driver 452 is installed on the turntable 300. Preferably, the mold locking driver 452 is also located below the turntable 300 to effectively utilize the space below the turntable 300; the output end 4521 of the mold locking driver 452 is assembled and connected with the pivot shaft 451, and the mold locking driver 452 drives the pivot shaft 451 to slide back and forth in the horizontal direction, driving the first pivot hook 453 and the second pivot hook 454 to hook or detach from the second side 422 of the flip upper mold base 420 at the same time; specifically, the mold locking driver 452 drives the pivot shaft 451 to move horizontally close to the flip upper mold base 420 in the mold closing position, and the pivot shaft 451 drives the first pivot hook 453 and the second pivot hook 454 to hook the second side 422 of the flip upper mold base 420 at the same time, as shown in the figure. Figure 3 As shown; the mold locking driver 452 drives the pivot shaft 451 to move horizontally away from the flip upper mold base 420 in the mold closing position, and the pivot shaft 451 drives the first pivot hook 453 and the second pivot hook 454 to simultaneously disengage from the second side 422 of the flip upper mold base 420. Figure 4 As shown. With the help of the pivot shaft 451, the mold clamping driver 452, the first pivot hook 453 and the second pivot hook 454, the purpose of simultaneously driving the first pivot hook 453 and the second pivot hook 454 to hook or detach from the flipping upper mold base 420 by means of one mold clamping driver 452 is achieved, thereby reducing the number of mold clamping drivers 452 used. Figure 6 and Figure 7 In the embodiment, the mold locking driver 452 is an air cylinder or an oil cylinder. Of course, other drivers can be selected according to actual needs, so the present invention is not limited thereto.

[0036] See also Figures 8 to 12The central shaft 100 includes a hollow shaft body 10, a rotary joint 20, a sleeve 30 sealed and fitted on the shaft body 10, and an electrical box turntable 60 fixed to the upper end of the sleeve 30 and surrounding the rotary joint 20 on all sides. The lower end of the shaft body 10 is assembled on the supporting base 200, and the supporting base 200 provides support for the shaft body 10. The turntable 300 is mounted on the shaft body 10 and is located below the sleeve 30. The sleeve 30 and the shaft body 10 together enclose a water outflow channel 41, a water return channel 42, an oil outflow channel 43 and an oil return channel 44 that are separated from each other. The sleeve 30 is linked to the turntable 300 through a connecting bracket 90a, so that the sleeve 30 rotates around the shaft body 10 along with the turntable 300, that is, the rotating turntable 300 can drive the sleeve 30 to rotate around the shaft body 10 through the connecting bracket 90a; the sleeve 30 is provided with a water outflow channel 41, a water return channel 42, an oil outflow channel 43 and an oil return channel 44 that are separated from each other. The water outflow joint 31 connected to the flow channel 41, the water return joint 32 connected to the water return channel 42, the oil outflow joint 33 connected to the oil outflow channel 43, and the oil return joint 34 connected to the oil return channel 44, with the help of the cooperation of the water outflow joint 31 and the water return joint 32, realize the back and forth circulation of water. Similarly, with the help of the cooperation of the oil outflow joint 33 and the oil return joint 34, realize the back and forth circulation of oil. The hollowness of the shaft body 10 forms a central channel 11 that axially passes through the shaft body 10. The shaft body 10 is also provided with a water input channel 12 connected to the water outflow channel 41, an oil input channel 13 connected to the oil outflow channel 43, a water output channel 14 connected to the water return channel 42, and an oil output channel 15 connected to the oil return channel 44, so as to facilitate the assembly of the external input water pipe 71 on the water input channel 12, the assembly of the external input oil pipe 73 on the oil input channel 13, the assembly of the external return water pipe 72 on the water output channel 14, and the assembly of the external return oil pipe 74 on the oil output channel 15. The rotary joint 20 is assembled on the upper end of the shaft body 10, and the shaft body 10 provides support for the rotary joint 20. The rotary joint 20 is provided with an air passage 21 and an electric passage 22 that are connected to and connected to the central channel 11 and separated from each other, so that the external air pipe 75 can pass through from the bottom of the central channel 11 and then be assembled at the air passage 21, and the external cable 80 can pass through from the bottom of the central channel 11 and then pass through the electric passage 22 of the rotary joint 20 to meet the needs of assembly with the controller in the electrical box turntable 60. Because the electrical box turntable 60 is fixed to the upper end of the shaft sleeve 30, the electrical box turntable 60, the shaft sleeve 30 and the turntable 300 can rotate together around the center line of the shaft body 10, so that the controller installed in the electrical box turntable 60 can rotate with the electrical box turntable 60. In addition, with the cooperation of the rotary joint 20, the external cable 80 and the external air pipe 75 can be prevented from being entangled.

[0037] Among them, in the central shaft 100, since the shaft sleeve 30 is sealed and fitted on the shaft body 10 and surrounds the water outflow channel 41, the water return channel 42, the oil outflow channel 43 and the oil return channel 44 separated from each other, and the shaft sleeve 30 can rotate around the shaft body 10 and is provided with a water outflow joint 31 connected to the water outflow channel 41, a water return joint 32 connected to the water return channel 42, an oil outflow joint 33 connected to the oil outflow channel 43 and an oil return joint 34 connected to the oil return channel 44; and the shaft body 10 is also provided with a water input channel 12 connected to the water outflow channel 41, a water input channel 12 connected to the oil outflow channel 43, and a water return joint 34 connected to the oil return channel 44. The oil input channel 13, the water output channel 14 connected to the water return channel 42 and the oil output channel 15 connected to the oil return channel 44, the rotary joint 20 is assembled on the upper end of the shaft body 10 and is provided with an air passage 21 and an electric passage 22 that are connected to the central channel 11 and separated from each other; this design centrally arranges the ventilation, water, electricity and oil, making the overall structure simple for easy maintenance. At the same time, with the help of the rotation of the sleeve 30 and the rotary joint 20 relative to the shaft body 10, the external input water pipe 71, the external return water pipe 72, the external input oil pipe 73, the external return oil pipe 74, the external air pipe 75 and the external cable 80 can be prevented from being entangled. It should be noted that since the specific structure of the rotary joint 20 is already well known in the art, it will not be repeated here. More specifically, as follows:

[0038] like Figures 10 to 12As shown, the shaft sleeve 30 includes a first shaft sleeve 30a and a second shaft sleeve 30b. The first shaft sleeve 30a and the shaft body 10 together enclose a water outflow channel 41 and a water return channel 42, while the second shaft sleeve 30b and the shaft body 10 together enclose an oil outflow channel 43 and an oil return channel 44. The water outflow joint 31 and the water return joint 32 are located on the first shaft sleeve 30a, while the oil outflow joint 33 and the oil return joint 34 are located on the second shaft sleeve 30b. This design facilitates the processing of the water outflow channel 41 and the water return channel 42 on the first shaft sleeve 30a, and the processing of the oil outflow channel 43 and the oil return channel 44 on the shaft sleeve 30, and ensures the convenience of assembly operation and sealing reliability between the shaft sleeve 30 and the shaft body 10. In addition, the first shaft sleeve 30a is connected to the turntable 300 via the connecting bracket 90a. Specifically, the central shaft 100 further includes an intermediate connecting ring 50, one end of the intermediate connecting ring 50 is detachably fixed to the first sleeve 30a by means of a first locking piece 51, and the other end of the intermediate connecting ring 50 is detachably fixed to the second sleeve 50b by means of a second locking piece 52. The purpose of this design is to facilitate the assembly and disassembly of the first sleeve 30a and the second sleeve 30b with the shaft body 10, respectively, and to connect the first sleeve 30a and the second sleeve 30b into one piece through the intermediate connecting ring 50; preferably, the second sleeve 30b is located above the first sleeve 30a so that water can pass through. The outflow channel 41 and the water return channel 42 are respectively located below the oil outflow channel 43 and the oil return channel 44, effectively preventing water leakage caused by water vapor generated during the cooling process of the water body from being mistaken for oil leakage, thereby allowing oil and water to be fully identified, thereby making maintenance more convenient; for example, the first locking member 51 and the second locking member 52 are each a screw, and they are each arranged in a row in the circumferential direction of the intermediate connecting ring 50. The purpose of such an arrangement is to increase the reliability of fixing the intermediate connecting ring 50 to the first shaft sleeve 30a and the second shaft sleeve 30b respectively, but the present invention is not limited to this.

[0039] like Figures 10 to 12As shown, the inner side wall 351 of the first sleeve 30a has a first protruding ring 352, a second protruding ring 353 and a third protruding ring 354 that protrude toward the shaft body 10 and are tightly fitted with the shaft body 10. The first protruding ring 352, the second protruding ring 353 and the third protruding ring 354 are arranged in sequence from bottom to top along the shaft body 10, and a sealing ring 355 is installed between the first protruding ring 352, the second protruding ring 353 and the third protruding ring 354 and the shaft body 10. This design more effectively ensures the first sleeve The sealing reliability and rotation smoothness between the sleeve 30a and the shaft body 10 are improved; the water outflow channel 41 is located between the first convex ring 352 and the second convex ring 353, and the water return channel 42 is located between the second convex ring 353 and the third convex ring 354; of course, according to actual needs, the water return channel 42 can be located between the first convex ring 352 and the second convex ring 353, and correspondingly, the water outflow channel 41 is located between the second convex ring 353 and the third convex ring 354, so it is not limited to this. At the same time, a rotary bearing 356 is installed between the inner side wall 351 of the first sleeve 30a and the shaft body 10, and the upper rotary bearing 356 is located above the third protruding ring 354 and axially abuts against the third protruding ring 354, and the lower rotary bearing 356 is located below the first protruding ring 352 and axially abuts against the first protruding ring 352, so as to increase the smoothness of the rotation of the first sleeve 30a around the shaft body 10; and with the help of the intermediate connecting ring 50, the upper and lower rotary bearings 356 on the first sleeve 30a and the shaft body 10 are facilitated.

[0040] like Figures 10 to 12As shown, the inner side wall 361 of the second sleeve 30b has a first ring platform 362, a second ring platform 363 and a third ring platform 364 that protrude toward the shaft body 10 and are tightly fitted with the shaft body 10. The first ring platform 362, the second ring platform 363 and the third ring platform 364 are arranged in sequence from bottom to top along the shaft body 10, and a sealing ring 365 is installed between the first ring platform 362, the second ring platform 363 and the third ring platform 364 and the shaft body 10. This design can more effectively ensure the second shaft The sealing reliability and rotation smoothness between the sleeve 30b and the shaft body 10 are improved; the oil outflow channel 43 is located between the first ring platform 362 and the second ring platform 363, and the oil return channel 44 is located between the second ring platform 363 and the third ring platform 364; of course, according to actual needs, the oil return channel 44 can be located between the first ring platform 362 and the second ring platform 363, and correspondingly, the oil outflow channel 43 is located between the second ring platform 363 and the third ring platform 364, so it is not limited to this. At the same time, a rotating bearing 366 is installed between the inner side wall 361 of the second sleeve 30b and the shaft body 10, and the upper rotating bearing 366 is located above the third ring platform 364 and axially abuts against the third ring platform 364, and the lower rotating bearing 366 is located below the first ring platform 362 and axially abuts against the first ring platform 362, so as to increase the smoothness of the rotation of the second sleeve 30b around the shaft body 10; and with the help of the intermediate connecting ring 50, the upper and lower rotating bearings 366 on the second sleeve 30a and the shaft body 10 are facilitated.

[0041] like Figure 8 、 Figure 10 、 Figure 11 and Figure 12As shown, to facilitate assembly and disassembly operations, the shaft body 10 includes an axially fixed lower shaft body 10a and an upper shaft body 10b. Preferably, the lower shaft body 10a and the upper shaft body 10b are fixed together by screws to facilitate operations between the lower shaft body 10a and the upper shaft body 10b; and the screws are inserted into the lower shaft body 10a and the upper shaft body 10b along the axial direction of the shaft body 10, which can prevent the screws from increasing the occupied space due to radially protruding from the shaft body 10, but is not limited to this. The central channel 11 passes through the lower shaft body 10a and the upper shaft body 10b. The central channel 11 of the lower shaft body 10a is larger than the central channel 11 of the upper shaft body 10b, so that the external input water pipe 71, the external return water pipe 72, the external input oil pipe 73, the external return oil pipe 74, the external air pipe 75 and the external cable 80 can be inserted into the central channel 11 of the lower shaft body 10a and then assembled at the corresponding positions; the water input channel 12, the oil input channel 13, the water output channel 14 and the oil output channel 15 pass downward through the upper shaft body 10b and are located in the central channel 11 of the lower shaft body 10a. This arrangement makes it easier to assemble the external input water pipe 71, the external return water pipe 72, the external input oil pipe 73 and the external return oil pipe 74 with the upper shaft body 10b. When the shaft body 10 includes a lower shaft body 10a and an upper shaft body 10b, the turntable 300 is then mounted on the lower shaft body 10a, specifically, the assembled bearing 90b is mounted on the lower shaft body 10a, so that the turntable 300 can rotate around the shaft body 10 more flexibly and smoothly; it is understandable that when the shaft body 10 is not divided into a lower shaft body 10a and an upper shaft body 10b, the turntable 300 is then mounted on the shaft body 10 using the assembled bearing 90b, so it is not limited to this.

[0042] It should be noted that in Figure 10 In the figure, the flow process of the external water body is as follows: the water body enters from the external input water pipe 71, then flows through the water input channel 12, the water outflow channel 41, the water outflow joint 31, the water return joint 32, the water return channel 42 and the water output channel 14 in sequence, and then flows out from the external return water pipe 72; similarly, in Figure 11 In the figure, the flow process of the external oil is as follows: the oil enters from the external input oil pipe 73, then flows through the oil input channel 13, the oil outflow channel 431, the oil outflow joint 33, the oil return joint 34, the oil return channel 44 and the oil output channel 15 in sequence, and then flows out from the external return oil pipe 74.

[0043] In conjunction with the accompanying drawings, the working principle of the PU turntable machine 1 of the present invention is explained: in the process of the turntable driving mechanism driving the turntable 300 to do step-by-step rotation, the mold opening and closing mechanism 400 drives the PU mold 500 to do periodic mold opening and closing movements. Figure 3 The clamping position shown is switched to Figure 5When the mold is in the mold opening position shown, the mold locking assembly 450 of the mold opening and closing mechanism 400 is first released from the locking of the flip upper mold base 420. Figure 4 Then, the flip driver 430 drives the flip mold base 420 and the flip mold base 420 on the upper mold 510 to flip together until the mold opening position, the state is shown Figure 5 shown; in Figure 5 In the state shown, the lifting driver 440 can drive the lower mold base 410 and the lower mold 520 to lift upwards so as to take out the product in the lower mold 520. Figure 5 The mold opening position shown is switched to Figure 3 At the mold closing position shown in FIG, the flip driver 430 first flips the flip upper mold base 420 and the upper mold 510 on the flip upper mold base 420 to the mold closing position. Figure 4 Finally, the clamping assembly 450 locks the flip upper mold base 420, and the state is shown in FIG. Figure 3 shown.

[0044] Compared with the prior art, the turntable 300 is rotatably supported on the supporting base 200 by means of the central axis 100, and then the turntable driving mechanism is used to make the turntable 300 rotate around the axis C of the central axis 100 under the drive of the turntable driving mechanism, so that the turntable 300 and the mold opening and closing mechanism 400 and the PU mold 500 on the turntable 300 can rotate together around the axis C of the central axis 100, so it has the advantage of simple structure compared with the existing waist-shaped conveyor line; with the help of multiple openings arranged at intervals on the turntable 300 along the circumference of the turntable 300, the turntable 300 can rotate around the axis C of the central axis 100. The mold clamping mechanism 400, with each mold opening and closing mechanism 400 being responsible for the mold opening and closing movement of a corresponding PU mold 500, realizes the purpose of automatic mold opening and closing of the PU mold 500. At the same time, because a plurality of mold opening and closing mechanisms 400 are arranged on the turntable 300 along the circumference of the turntable 300, the spacing between the mold opening and closing mechanisms 400 can be made more compact, thereby making the spacing between the PU molds 500 more compact. Compared with the existing waist-shaped conveyor line, the PU molds 500 are kept at a larger distance to ensure smooth conveyance of the PU molds 500 at the corners.

[0045] It is worth noting that, to further enhance the level of automation, the PU turntable machine 1 of the present invention is preferably electrically connected to an existing controller, which controls the coordinated operation of the various components of the PU turntable machine 1 of the present invention. Furthermore, the turntable drive mechanism can be comprised of a turntable motor mounted on the supporting base 200, a turntable gear mounted on the output end of the turntable motor, and an annular rack mounted on the turntable 300 and coinciding with the center of the turntable 300, with the annular rack located below the turntable 300. Therefore, the turntable motor, through the cooperation of the turntable gear and the annular rack, can drive the turntable 300 to rotate about the axis C of the central axis 100. Of course, the turntable drive mechanism can also have other structures, and is not limited to this.

[0046] The above disclosure is only a preferred embodiment of the present invention and cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are within the scope of the present invention.

Claims

1. A PU turntable machine, characterized in that, The invention comprises a supporting base, a turntable located above the supporting base, a central shaft passing through the turntable from top to bottom and with the lower end assembled to the supporting base, a plurality of mold opening and closing mechanisms assembled to the turntable and spaced apart from each other in the circumferential direction of the turntable, PU molds having the same number as the mold opening and closing mechanisms, and a turntable driving mechanism assembled to the supporting base, wherein the PU molds are assembled to the mold opening and closing mechanisms, the mold opening and closing mechanisms are used to drive the PU molds to perform mold opening and closing movements, and the turntable rotates around the axis of the central shaft under the drive of the turntable driving mechanism; The central shaft comprises a hollow shaft body, a rotary joint and a sleeve which is sealed and fitted on the shaft body. The lower end of the shaft body is assembled on the bearing base. The turntable is fitted on the shaft body and is located below the sleeve. The sleeve and the shaft body together enclose a water outflow channel, a water return channel, an oil outflow channel and an oil return channel which are separated from each other. The sleeve is linked to the turntable through a connecting bracket so that the sleeve rotates around the shaft body along with the turntable. The sleeve is provided with a water outflow joint which is connected to the water outflow channel, a water return channel which is connected to the water return channel, and a water outflow joint which is connected to the water return channel. A water return joint, an oil outflow joint connected to the oil outflow channel and an oil return joint connected to the oil return channel, the hollow part of the shaft body forms a central channel axially passing through the shaft body, the shaft body is also provided with a water input channel connected to the water outflow channel, an oil input channel connected to the oil outflow channel, a water output channel connected to the water return channel and an oil output channel connected to the oil return channel, the rotary joint is assembled at the upper end of the shaft body, the rotary joint is provided with an air channel and an electrical channel that are connected to the central channel and separated from each other.

2. The PU turntable machine according to claim 1, characterized in that: All the mold opening and closing mechanisms are arranged in a complete circle on the turntable, and the mold opening and closing mechanisms are also arranged adjacent to the outer edge of the turntable.

3. The PU turntable machine according to claim 1, characterized in that: The mold opening and closing mechanism includes a lower mold base, a flip upper mold base, a flip drive, a lifting drive, a locking assembly and a suspension mounting bracket located below the turntable, the upper end of the suspension mounting bracket being assembled on the turntable, the lifting drive being mounted on the suspension mounting bracket, the lower mold base being mounted on the output end of the lifting drive, the lower mold base being lifted and slid up and down by the drive of the lifting drive, the flip upper mold base being mounted on the turntable in an upside-down manner and having a mold closing position to be flipped to the upper part of the lower mold base and a mold opening position to be flipped away from the lower mold base relative to the turntable, the flip drive being mounted on the turntable or the suspension mounting bracket and driving the flip upper mold base to switch between the mold closing position and the mold opening position, the locking assembly being mounted on the turntable and being used to prevent the flip upper mold base in the mold closing position from switching to the mold opening position.

4. The PU turntable machine according to claim 3, characterized in that: The output end of the lifting drive is arranged upward, the flip drive is located beside the suspension mounting bracket, and the flip drive is also suspended below the turntable.

5. The PU turntable machine according to claim 3, characterized in that: The first side of the flip upper mold base is pivotally connected to the turntable by means of a pivot structure, and the clamping assembly is located outside the second side opposite to the flip upper mold base. The clamping assembly blocks and cooperates with the second side of the flip upper mold base in the mold closing position.

6. The PU turntable machine according to claim 5, characterized in that: The output end of the flip driver is arranged upward, and a rack is installed on the output end of the flip driver. A gear that meshes with the rack is fixedly mounted on the pivot structure. The rack is driven by the flip driver to move up and down, and the gear, together with the pivot structure and the flip upper mold base, is driven by the up and down sliding rack to flip.

7. The PU turntable machine according to claim 5, characterized in that: The mold locking assembly includes a pivot shaft, a mold locking driver, and a first pivot hook and a second pivot hook pivotally connected to the turntable. The pivot shaft and the pivot structure are parallel to each other, and the pivot shaft is also located below the turntable. The first pivot hook and the second pivot hook are each fixed to the pivot shaft, and the first pivot hook is also separated from the second pivot hook along the axial direction of the pivot shaft. The mold locking driver is installed on the turntable, and the output end of the mold locking driver is assembled and connected to the pivot shaft. The mold locking driver drives the pivot shaft to slide back and forth in the horizontal direction, driving the first pivot hook and the second pivot hook to hook or detach from the second side of the flip upper mold base at the same time.

8. The PU turntable machine according to claim 1, characterized in that: The central shaft also includes an intermediate connecting ring and an electric box turntable, and the shaft sleeve includes a first shaft sleeve and a second shaft sleeve. The first shaft sleeve and the shaft body together enclose the water outflow channel and the water return channel, and the second shaft sleeve and the shaft body together enclose the oil outflow channel and the oil return channel. The water outflow joint and the water return joint are located on the first shaft sleeve, and the oil outflow joint and the oil return joint are located on the second shaft sleeve. One end of the intermediate connecting ring is detachably fixed to the first shaft sleeve by means of a first locking piece, and the other end of the intermediate connecting ring is detachably fixed to the second shaft sleeve by means of a second locking piece. The first shaft sleeve is linked to the turntable through the connecting bracket, and the electric box turntable is fixed to the upper end of the shaft sleeve and surrounds the rotating joint from all sides.

9. The PU turntable machine according to claim 8, characterized in that: The inner side wall of the first sleeve has a first convex ring, a second convex ring and a third convex ring that protrude toward the shaft body and are tightly fitted with the shaft body, the first convex ring, the second convex ring and the third convex ring are arranged in sequence from bottom to top along the shaft body, and a sealing ring is assembled between the first convex ring, the second convex ring and the third convex ring and the shaft body, one of the water outflow channel and the water return channel is located between the first convex ring and the second convex ring, and the other of the water outflow channel and the water return channel is located between the second convex ring and the third convex ring, and a rotating bearing arranged one above and one below is fitted between the inner side wall of the first sleeve and the shaft body, the upper rotating bearing is located above the third convex ring and axially abuts against the third convex ring, and the lower rotating bearing is located below the first convex ring and axially abuts against the first convex ring; The inner side wall of the second sleeve has a first ring platform, a second ring platform and a third ring platform that protrude toward the shaft body and are tightly fitted with the shaft body. The first ring platform, the second ring platform and the third ring platform are arranged in sequence from bottom to top along the shaft body, and a sealing ring is installed between the first ring platform, the second ring platform and the third ring platform and the shaft body. One of the oil outflow channel and the oil return channel is located between the first ring platform and the second ring platform, and the other of the oil outflow channel and the oil return channel is located between the second ring platform and the third ring platform. A rotating bearing arranged one above and one below is fitted between the inner side wall of the second sleeve and the shaft body. The upper rotating bearing is located above the third ring platform and axially abuts against the third ring platform, and the lower rotating bearing is located below the first ring platform and axially abuts against the first ring platform.

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