Oven of an oven-type swing rotomoulding machine

Abstract

The present application provides a kind of oven of oven type swing rotational moulding machine, belong to the technical field of plastics processing.It solves the existing oven type swing rotational moulding machine lifting mechanism and installation support connection, there is complex structure, the problem of cumbersome dismounting operation.The oven of oven type swing rotational moulding machine includes oil supply module and the lower box lifting device of connecting upper box body and lower box body;Lower box lifting device includes a group of hydraulic cylinders and a group of lifting ropes, the cylinder body of hydraulic cylinder is installed on upper box body, lifting rope is connected with upper box body through reversing wheel, one end of lifting rope is connected with lower box body, the other end of lifting rope is connected with the piston rod of hydraulic cylinder.The oven of oven type swing rotational moulding machine makes rotational moulding machine production operation without operating the combination and separation between lower box and lifting mechanism, and makes upper box body and lower box body keep combined state, without additional dismounting locking bolt, realize simplifying rotational moulding machine operation, improve production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of plastic processing technology, and relates to a rotational molding machine, particularly an oven for an oven-type oscillating rotational molding machine. Background Technology

[0002] Rotational molding is a method of hollow molding thermoplastics. The process involves first adding plastic raw material into a mold, then rotating and heating the mold along two perpendicular axes. Under the influence of gravity and heat, the plastic raw material gradually and evenly coats, melts, and adheres to the entire surface of the mold cavity, forming the desired shape. The product is then cooled and solidified. A rotational molding machine is a specialized molding equipment used to process hollow plastic products using this process.

[0003] There are many relevant documents on rotational molding machines, such as the applicant's proposed dual-station oven-type oscillating rotational molding machine (authorization announcement number CN202462748U), which includes a mounting bracket and an oven; the oven includes an upper box and a lower box that can be detached or connected to each other, the upper box is mounted on the mounting bracket and a heating device is installed inside the upper box, a drive mechanism is provided between the upper box and the mounting bracket that can drive the upper box to rotate around the mounting bracket, the lower box is connected to the mounting bracket through a lifting mechanism, and guide devices are provided on both sides of the mounting bracket, the guide devices include two guide rails that are fixedly mounted on the two edges of the base and an arm seat with pulleys for fixing the mold, the pulleys are rotatably connected to the guide rails.

[0004] While this technical solution theoretically achieves dual-station production of workpieces, it still faces numerous technical challenges that prevent its practical application. For example: 1. The lower box is connected to the mounting bracket via a lifting mechanism, requiring it to disengage from the lifting mechanism during oven oscillation. The upper and lower boxes are typically connected by locking bolts, resulting in a complex structure, cumbersome disassembly and assembly, minimal increase in production efficiency, and insufficient economic viability. 2. Manually disassembling and assembling the locking bolts between the upper and lower boxes, manually operating the lower box to engage and disengage from the lifting mechanism, and manually pushing and pulling the arm and mold all present challenges related to high labor intensity for workers. Furthermore, the high ambient temperature during operation of the dual-station oven-type oscillating rotational molding machine poses a risk to worker health. Summary of the Invention

[0005] This invention proposes an oven for a rotary gyratory molding machine. The technical problem this invention aims to solve is how to provide an oven for a rotary gyratory molding machine that simplifies the disassembly and assembly of the oven and improves production efficiency.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: an oven for a rotary molding machine, the oven comprising an upper chamber and a lower chamber, the upper chamber having an upper mating plane, and the lower chamber having a lower mating plane capable of contacting the upper mating plane; the oven further comprising an oil supply module and a lower chamber lifting device connecting the upper chamber and the lower chamber; the lower chamber lifting device comprising a set of hydraulic cylinders and a set of lifting ropes, the cylinder bodies of the hydraulic cylinders being mounted on the upper chamber, the cylinder axis being parallel to the upper mating plane, and the lifting ropes being connected to the upper chamber. The lifting rope is connected to the lower chamber via a reversing wheel, and the other end of the lifting rope is connected to the piston rod of the hydraulic cylinder. The oil supply module includes an oil tank, an oil pump, an overflow valve, and a control valve. The oil supply module is connected to the hydraulic cylinder via a pipeline. The oil supply module is used to control the extension or retraction of the piston rod of the hydraulic cylinder. The oil supply module is also used to control the piston rod of the hydraulic cylinder to remain in the retracted state. When the piston rod of the hydraulic cylinder retracts, the piston rod pulls the lower chamber upward through the lifting rope so that the lower mating plane contacts the upper mating plane, and the oven is in the mating state.

[0007] Typically, the extension and retraction of the hydraulic cylinder piston rod are controlled by manipulating the control valve of the oil supply module, and the oil pump keeps the piston rod in the retracted state. The process of the oven transitioning from the disassembled to the assembled state is as follows: the hydraulic cylinder piston rod retracts, pulling the lifting rope upwards. The lifting rope then pulls the lower chamber and other components mounted on it upwards until the upper and lower mating surfaces of the upper and lower chambers contact each other. During the movement of the lifting rope, the reversing wheel not only changes the direction of force (converting the horizontal tension of the piston rod into a vertical tension) but also improves the flexibility and stability of the lifting rope's movement. The process of the oven transitioning from the assembled to the disassembled state is as follows: the hydraulic cylinder piston rod extends, and the lower chamber and other components mounted on it automatically move downwards under gravity as the piston rod extends until the lower chamber contacts the ground.

[0008] Compared with existing technologies, the upper and lower boxes of this oven-type gyratory rotational molding machine are connected by a lower box lifting device, which eliminates the need to operate the lower box and the lifting mechanism to engage and disengage during rotational molding machine production, simplifying the operation of the rotational molding machine and improving production efficiency.

[0009] The lower chamber lifting device uses a hydraulic cylinder as the drive source. The pressure holding capability formed by the hydraulic cylinder and the oil supply module ensures that the upper and lower chambers of the oven remain connected during the production operation of the rotational molding machine. There is no need to disassemble and tighten the bolts, which simplifies the operation of the rotational molding machine and improves production efficiency.

[0010] By selecting appropriate hydraulic cylinders and oil supply modules, the weight of the lower chamber and other components installed on it can be matched; it has stable lifting and significantly reduces the possibility of impact and vibration caused by the opening and closing of the oven in the rotational molding machine.

[0011] The oil supply module is not installed on the oven. During the production operation of the rotational molding machine, the oil supply module does not sway with the oven. In other words, the number of components installed on the oven in the lower box lifting device of this oven is small, which has the advantage of being lightweight and significantly reduces the impact on the swaying of the oven.

[0012] The hydraulic cylinders are arranged parallel to the mating surface of the oven, which improves the structural compactness and significantly reduces the possibility of increased space required for oven swaying due to the arrangement of the hydraulic cylinders.

[0013] In the oven of the aforementioned oven-type gyratory rotational molding machine, the oil supply module also includes a hydraulically controlled check valve for maintaining pressure in the hydraulic cylinders and a synchronization valve for synchronously retracting the piston rods of the two hydraulic cylinders.

[0014] In the oven of the aforementioned oven-type gyratory molding machine, a set of hydraulic cylinders includes two hydraulic cylinders, and a set of lifting ropes includes four lifting ropes. Each hydraulic cylinder is connected to two lifting ropes. The two hydraulic cylinders are located on the left and right sides or the front and rear ends of the upper chamber, respectively, and the four lifting ropes are connected to the four corners of the lower chamber.

[0015] In the oven of the aforementioned oven-type gyratory rotational molding machine, a set of hydraulic cylinders includes one, three, or four hydraulic cylinders, and a set of lifting ropes includes two, three, or six lifting ropes.

[0016] In the oven of the aforementioned oven-type gyratory rotational molding machine, the oven further includes multiple sets of first positioning components for positioning the upper and lower boxes when they are in a combined state.

[0017] In the oven of the aforementioned oven-type gyratory rotational molding machine, the first positioning component includes a first positioning pin and a first positioning sleeve fitted on the first positioning pin; the first positioning pin is fixedly installed on the upper chamber, and the first positioning sleeve is fixedly installed on the lower chamber.

[0018] In the oven of the aforementioned oven-type gyratory rotational molding machine, the first positioning component includes guide positioning rods fixedly connected to the upper chamber, and multiple guide positioning rods are arranged longitudinally along the upper mating plane of the upper chamber; the outer side surface of the upper chamber has guide positioning surfaces that are adapted to each guide positioning rod; when the lower chamber moves from bottom to top, the guide positioning surfaces contact the side surfaces of the guide positioning rods to form a guide structure and a positioning structure.

[0019] In the oven of the aforementioned oven-type gyratory rotational molding machine, the oven further includes multiple sets of second positioning components for positioning the lower chamber and the ground when in the split state.

[0020] In the oven of the aforementioned oven-type gyratory rotational molding machine, the second positioning component includes a guide column fixed on the ground and a guide wheel rotatably mounted on the lower chamber and adapted to the guide column.

[0021] In the oven of the aforementioned oven-type gyratory rotational molding machine, the second positioning component includes a guide column fixed on the ground and a guide wheel rotatably mounted on the lower chamber and adapted to the guide column; the second positioning component may also include a second positioning pin and a second positioning sleeve sleeved on the second positioning pin, the second positioning pin being fixed on the ground and the second positioning sleeve being fixed on the lower chamber.

[0022] In the oven of the aforementioned oven-type gyratory molding machine, the oven further includes a heating component for heating the air inside the oven cavity. The heating component is a combustion heater, which is installed on the upper chamber. The upper chamber is equipped with a forced exhaust device for extracting gas from the oven cavity. The forced exhaust device includes a fan, and the fan's air inlet is connected to the inner cavity of the upper chamber through a set of first pipes.

[0023] In the oven of the aforementioned oven-type gyratory molding machine, the oven further includes a heating component for heating the air inside the oven cavity, which is an electric heating wire installed on the upper and lower chambers.

[0024] In the oven of the aforementioned oven-type gyratory rotational molding machine, the lower chamber includes a lower chamber body, a left side wall, and a right side wall. The bottom edges of the left side wall and the right side wall are connected to the lower chamber body by hinges, and the left side wall and the right side wall can be opened or closed. The left side wall and the right side wall are also connected to the lower chamber body by a first cylinder or a first electric cylinder.

[0025] In the oven of the aforementioned oven-type oscillating rotational molding machine, the oven-type oscillating rotational molding machine includes a mold rotation device, which includes a support and a mold mounting frame for mounting the rotational molding mold. The support is rotatably connected to the lower body of the lower chamber. The support and the mold mounting frame are connected by a second rotating shaft. A second motor is mounted on the support, and the main shaft of the second motor is connected to the second rotating shaft through a first transmission assembly. A conical positioning sleeve is fixed on the support, and a conical positioning pin adapted to the conical positioning sleeve is fixed on the upper chamber of the oven. When the upper and lower chambers of the oven are in a combined state, the conical positioning pin is inserted into the conical positioning sleeve, and the conical positioning pin and the conical positioning sleeve form a positioning structure. Attached Figure Description

[0026] Figure 1 and Figure 2 This is a three-dimensional structural diagram of the oven in a dual-station oven-type gyratory molding machine, showing the oven in a combined state from different perspectives.

[0027] Figure 3This is a three-dimensional structural diagram of the oven in a split-up state in a dual-station oven-type gyratory molding machine.

[0028] Figure 4 This is a three-dimensional structural diagram of the oven and frame area in a rotational molding machine.

[0029] Figure 5 This is a three-dimensional structural diagram of the oven area in a rotational molding machine.

[0030] Figure 6 This is a schematic diagram of the main structure of the oven area in a rotational molding machine.

[0031] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional view of AA.

[0032] Figure 8 yes Figure 6 A schematic diagram of the cross-sectional view of BB.

[0033] Figure 9 yes Figure 7 Enlarged view of a section at point C.

[0034] Figure 10 yes Figure 8 Enlarged view of a section at point D.

[0035] Figure 11 This is a schematic diagram of the three-dimensional structure of the upper housing area in a rotational molding machine.

[0036] Figure 12 This is a schematic diagram of the three-dimensional structure of the lower housing area of ​​the rotational molding machine.

[0037] Figure 13 This is a three-dimensional structural diagram of the rotational molding die and the die rotation device area in a rotational molding machine.

[0038] Figure 14 This is a three-dimensional structural diagram of the lower housing and assembly / disassembly station module area of ​​the rotational molding machine.

[0039] Figure 15 yes Figure 14 Enlarged view of a section at point E in the middle.

[0040] Figure 16 yes Figure 14 Enlarged view of a section at point F.

[0041] Figure 17 This is the hydraulic schematic diagram of the oil supply module.

[0042] In the diagram, 10 is the drying oven; 11 is the upper chamber; 12 is the lower chamber; 12a is the lower chamber body; 12b is the left side wall; 12c is the right side wall; 12d is the first electric cylinder; 13 is the exhaust gas forced exhaust device; 13a is the fan; 13b is the first pipe; 14 is the heating component; 15 is the lower chamber lifting device; 15a is the hydraulic cylinder; 15b is the lifting rope; 16 is the reversing wheel; 17 is the first positioning component; 17a is the first positioning pin; 17b is the first positioning sleeve; 18 is the conical positioning pin; 20 is the frame; 30 is the disassembly and assembly station module; 31 is the disassembly and assembly platform; 31a is the fixed section; 31b is the clearance section; 32 is the elevator; 33 is the translation drive component; 33a is the slider. 33b. Third motor; 33c. Transmission belt; 33d. Second transmission assembly; 40. Swing drive device; 41. First rotating shaft; 42. First motor; 43. Large gear; 44. Small gear; 50. Mold rotation device; 51. Support; 52. Mold mounting frame; 53. Second rotating shaft; 54. Second motor; 55. First transmission assembly; 56. Translation roller; 56a. Guide groove; 57. Conical positioning sleeve; 60. Rotational molding mold; 70. Translation rail; 70-1. Planar translation rail; 70-2. Guide translation rail; 71. First translation rail section; 72. Second translation rail section; 73. Guide protrusion; 80. Plug and socket assembly; 80a. Plug; 80b. Socket. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] Example 1: As Figures 1 to 12 As shown, the oven of the oven-type gyratory rotational molding machine includes a box body and a heating assembly 14. The box body is divided into an upper box body 11 and a lower box body 12 along the joint plane. The upper box body 11 has an upper joint plane, and the lower box body 12 has a lower joint plane that can contact the upper joint plane.

[0049] like Figures 1 to 3 As shown, the oven 10 is used in a dual-station oven-type gyratory rotational molding machine. The dual-station oven-type gyratory rotational molding machine also includes a frame 20, a disassembly / assembly station module 30, a gyratory drive device 40, and a mold rotation device 50. The frame 20 and the disassembly / assembly station module 30 are installed on the ground. There are two sets of disassembly / assembly station modules 30, which are located on the left and right sides of the frame 20, respectively.

[0050] like Figures 1 to 4As shown, the oven 10 is located inside the frame 20. The swing drive device 40 includes a first rotating shaft 41 fixedly connected to the middle of the upper chamber 11, a large gear 43 fixedly connected to the upper chamber 11, and a first motor 42 mounted on the frame 20. The first rotating shaft 41 is rotatably connected to the frame 20, and a small gear 44 meshing with the large gear 43 is fixed on the output shaft of the first motor 42. Operating the first motor 42 causes the small gear 44 to rotate, thereby driving the large gear 43 and the oven 10 to swing back and forth around the first rotating shaft 41.

[0051] like Figure 5 and Figure 6 As shown, the heating assembly 14 is installed on the upper housing 11. The accompanying drawings indicate that the heating assembly 14 is a combustion heater, and there are four sets of heating assemblies 14 arranged axially along the housing to achieve zoned heating of the rotational molding mold 60. The number of heating assemblies 14 may be increased or decreased depending on the actual situation. A forced exhaust device 13 for extracting gas from the inner cavity of the oven 10 is installed on the upper housing 11. The forced exhaust device 13 includes a fan 13a. The inlet of the fan 13a is connected to the inner cavity of the upper housing 11 through a first pipe 13b, and the outlet of the fan 13a is connected to a second pipe. The second pipe is connected to an external exhaust pipe through a union joint or a flexible pipe. The operation of the fan 13a also creates negative pressure at the joint between the upper housing 11 and the lower housing 12, which not only reduces the possibility of combustion exhaust gas spreading within the workshop and significantly reduces the possibility of exhaust gas polluting other components, but also lowers the ambient temperature, thus improving the service life of the components.

[0052] like Figure 12 As shown, the lower housing 12 includes a lower housing body 12a, a left side wall 12b, and a right side wall 12c. The bottom edges of the left side wall 12b and the right side wall 12c are connected to the lower housing body 12a via hinges, allowing the left side wall 12b and the right side wall 12c to be opened or closed. The left side wall 12b and the right side wall 12c are also connected to the lower housing body 12a via a first cylinder or a first electric cylinder 12d, which facilitates the opening or closing of the left side wall 12b and the right side wall 12c, and keeps the left side wall 12b and the right side wall 12c in a closed state. When the left side wall 12b and the right side wall 12c are in the closed state, the lower housing 12 forms a chamber; when the left side wall 12b or the right side wall 12c is in the open state, it facilitates the entry or exit of the mold rotation device 50, on which the rotational molding mold 60 is installed, into or out of the lower housing 12, especially the entry or exit of the rotational molding mold 60 into or out of the chamber of the lower housing 12.

[0053] like Figures 5 to 12 , Figure 17As shown, the oven 10 also includes an oil supply module and a lower chamber lifting device 15 connecting the upper chamber 11 and the lower chamber 12. The lower chamber lifting device 15 includes a set of hydraulic cylinders 15a and a set of lifting ropes 15b. The cylinder body of the hydraulic cylinder 15a is mounted on the upper chamber 11, and the axis of the cylinder body of the hydraulic cylinder 15a is parallel to the upper mating plane. The lifting ropes 15b are connected to the upper chamber 11 via a reversing wheel 16. One end of the lifting rope 15b is connected to the lower chamber body 12a of the lower chamber 12, and the other end of the lifting rope 15b is connected to the piston rod of the hydraulic cylinder 15a. The accompanying drawings show that the set of hydraulic cylinders 15a includes two hydraulic cylinders 15a, and the set of lifting ropes 15b includes four lifting ropes 15b, with each hydraulic cylinder 15a connected to two lifting ropes 15b. Two hydraulic cylinders 15a are located on the left and right sides or the front and rear ends of the upper chamber 11, respectively, and four lifting ropes 15b are connected to the four corners of the lower chamber 12. This arrangement can improve the symmetry of the weight distribution of the oven 10, thereby improving the swaying stability of the oven 10.

[0054] like Figure 17 As shown, the oil supply module is installed on the frame 20 or on the ground. The oil supply module is connected to the hydraulic cylinder 15a through a pipeline. The oil supply module is used to control the extension or retraction of the piston rod of the hydraulic cylinder 15a, and also to control the piston rod of the hydraulic cylinder 15a to be in the retracted state.

[0055] The oil supply module includes an oil tank, oil pump, relief valve, and control valve; the control valve is a solenoid four-way directional valve to improve ease of operation. The oil supply module also includes a stacked throttle valve to improve the reliability of the hydraulic system. The oil supply module also includes a hydraulically controlled check valve to improve the pressure holding reliability of hydraulic cylinder 15a. The oil supply module also includes a synchronization valve to improve the synchronization of piston rod retraction between the two hydraulic cylinders 15a, thereby improving the stability of the lower housing 12 during rise.

[0056] The process of oven 10 transitioning from the disassembled state to the assembled state is as follows: the piston rod of hydraulic cylinder 15a retracts, and the piston rod pulls the lower chamber 12 upward via lifting rope 15b, causing the lower mating plane to contact the upper mating plane, thus placing oven 10 in the assembled state. The oil supply module maintains stable pressure when the piston rod of hydraulic cylinder 15a is in the retracted state, thereby keeping oven 10 in the assembled state. The process of oven 10 transitioning from the assembled state to the disassembled state is as follows: the piston rod of hydraulic cylinder 15a extends, and the lower chamber 12 and other components mounted on the lower chamber 12 automatically move downward under gravity as the piston rod extends until the lower chamber 12 contacts the ground.

[0057] like Figures 6 to 12As shown, the oven 10 also includes multiple sets of first positioning components 17 for positioning the upper chamber 11 and lower chamber 12 when they are in the combined state. Each first positioning component 17 includes a first positioning pin 17a and a first positioning sleeve 17b fitted onto the first positioning pin 17a. The first positioning pin 17a is fixedly installed on the upper chamber 11, and the first positioning sleeve 17b is fixedly installed on the lower chamber 12. The accompanying drawings show four sets of first positioning components 17, which can be increased or decreased as needed. During the process of the oven 10 transitioning from a disassembled state to a combined state, the first positioning pin 17a is inserted into the first positioning sleeve 17b, improving the positional consistency of the upper chamber 11 and lower chamber 12 after repeated combinations, and also increasing the connection strength to prevent displacement of the upper chamber 11 and lower chamber 12 when the oven 10 swings.

[0058] The oven 10 also includes a second positioning component for positioning the lower chamber 12 and the ground when in the disassembled state. The second positioning component includes a guide post fixed to the ground and a guide wheel rotatably mounted on the lower chamber 12 and adapted to the guide post. Depending on the actual situation, the second positioning component may also include a second positioning pin and a second positioning sleeve fitted onto the second positioning pin. The second positioning pin is fixed to the ground, and the second positioning sleeve is fixed to the lower chamber 12. The second positioning component significantly improves the stability and positional consistency of the lower chamber 12 when placed on the ground. When the oven 10 changes from the assembled state to the disassembled state, the positioning pin and positioning sleeve of the first positioning component 17 gradually separate until they are completely separated. Then, the guide wheel engages with the guide post, and the second positioning pin of the second positioning component gradually inserts into the second positioning sleeve until the lower chamber 12 is placed on the ground. Pre-positioning is achieved through the cooperation of the guide wheel and guide post, significantly reducing the problems of difficulty in aligning and inserting the second positioning sleeve and pin due to shaking of the lower chamber 12, and the easy wear of the second positioning sleeve and pin.

[0059] like Figure 13 As shown, the mold rotation device 50 includes two supports 51 and a mold mounting frame 52 for mounting the rotational molding mold 60. Second rotating shafts 53 are fixed to both ends of the mold mounting frame 52, and the second rotating shafts 53 are rotatably connected to the two supports 51 in a one-to-one correspondence. A second motor 54 is mounted on one of the supports 51. The main shaft of the second motor 54 is connected to one of the second rotating shafts 53 via a first transmission assembly 55 composed of sprockets, transmission chains, and other components. By operating the second motor 54, the mounting frame is rotated, thereby causing the rotational molding mold 60 to rotate.

[0060] like Figure 1 , Figure 2 , Figure 3 , Figure 14As shown, the dual-station oven-type gyratory molding machine has two sets of mold rotation devices 50. The accompanying drawings show one set of mold rotation devices 50 located inside the oven 10, and the other set located within one of the assembly / disassembly station modules 30; either set of mold rotation devices 50 can be moved according to actual production needs.

[0061] like Figure 13 As shown, each support 51 has multiple translation rollers 56 rotatably connected to its bottom. The lower body 12a of the lower box 12 has a first translation rail section 71 fixedly connected below the support 51 and adapted to the translation rollers 56. When the mold rotation device 50 is inside the oven 10, the translation rollers 56 are located on the first translation rail section 71.

[0062] like Figures 5 to 7 , Figure 9 and Figure 13 As shown, a conical positioning sleeve 57 is fixed on each support 51. The positioning hole inside the conical sleeve is conical. A conical positioning pin 18 that matches the conical positioning sleeve 57 is fixed on the upper chamber 11 of the oven 10. When the mold rotation device 50 is located on the first translational track section 71 and the upper chamber 11 and lower chamber 12 of the oven 10 are in a combined state, the conical positioning pin 18 is inserted into the conical positioning sleeve 57, and the conical positioning pin 18 and the conical positioning sleeve 57 form a positioning structure. This structure not only improves the positional consistency of the mold rotation device 50 relative to the oven 10 and avoids interference between the mold mounting frame 52 or the rotational molding mold 60 and the upper chamber 11 or lower chamber 12 when the mold mounting frame 52 rotates, but also prevents the mold rotation device 50 from moving when the mold mounting frame 52 rotates.

[0063] like Figures 1 to 3 , Figures 14 to 16 As shown, a second translation rail section 72 is installed on the ground. Each assembly / disassembly station module 30 has two second translation rail sections 72, which are connected to two first translation rail sections 71 one-to-one. When the lower housing 12 is placed on the ground, the two first translation rail sections 71 and the two second translation rail sections 72 of each assembly / disassembly station module 30 are connected to the ground one-to-one, forming two translation rails 70. The mold rotation device 50 can move back and forth within the assembly / disassembly station module 30 and the lower housing 12 via the translation rails 70 and the translation rollers 56.

[0064] One of the two translation rails 70 is a planar translation rail 70-1, and the other is a guide translation rail 70-2 with a guide protrusion 73. The translation roller 56 that matches the planar translation rail 70-1 has a smooth surface, and the translation roller 56 that matches the guide translation rail 70-2 has a guide groove 56a on its surface that matches the guide protrusion 73. The guide groove 56a and the guide protrusion 73 cooperate to form a guide structure, and the smooth translation roller 56 can automatically move slightly with the thermal expansion and contraction of the mold rotation device 50. This structure not only improves the positional consistency of the mold rotation device 50 after reciprocating movement, but also improves the flexibility and stability of the mold rotation device 50 in reciprocating movement.

[0065] like Figures 1 to 3 , Figures 14 to 16 As shown, the dual-station oven-type oscillating rotational molding machine also includes a mold translation device that enables the mold rotation device 50 to reciprocate within the disassembly / assembly station module 30 and the lower housing 12. The mold translation device includes a plug-socket assembly 80 and a translation drive assembly 33. The plug 80a of the plug-socket assembly 80 is compatible with the socket 80b. The plug 80a is fixed to the support 51. The translation drive assembly 33 is mounted on the ground or on the disassembly / assembly station module 30. The translation drive assembly 33 is connected to the socket 80b and is used to generate a pushing or pulling force parallel to the translation rail 70 on the socket 80b. The accompanying drawings show that the mold translation device includes two sets of plug-socket assemblies 80 and one set of translation drive assemblies 33. The plugs 80a of the two sets of plug and socket assemblies 80 are correspondingly set with the two supports 51; a slider 33a is rolledly connected to each of the two second translation rail sections 72, and the sockets 80b of the two sets of plug and socket assemblies 80 are fixedly connected to the sliders 33a on the two second translation rail sections 72 in a corresponding manner. This structure improves the translational stability of the sockets 80b, improves the stress stability of the supports 51, and thus improves the positional consistency of the mold rotation device 50 after reciprocating movement. The plug and socket assembly 80 allows the plugs 80a to automatically insert into the sockets 80b when the lower housing 12 moves from top to bottom, and the plugs 80a to automatically separate from the sockets 80b when the lower housing 12 moves from bottom to top, improving the ease of operation.

[0066] The translation drive assembly 33 includes a third motor 33b and two transmission belts 33c. Two sliders 33a are fixedly connected to the two transmission belts 33c in a one-to-one correspondence. Both transmission belts 33c are connected to the main shaft of the third motor 33b via a second transmission assembly 33d composed of pulleys, transmission shafts, and other components. This structure improves the synchronicity of movement of the two sockets 80b, further improves the uniformity of force on the two supports 51, improves the translational stability of the sockets 80b, and improves the positional consistency of the mold rotation device 50 after reciprocating movement.

[0067] like Figures 1 to 3 , Figure 14As shown, the disassembly and assembly station module 30 also includes a disassembly and assembly platform 31 installed on the ground for people to walk and stand on. When the mold rotation device 50 is located inside the disassembly and assembly station module 30, the disassembly and assembly platform 31 is located outside the rotational molding mold 60. This structure makes it easier for workers to disassemble and assemble the rotational molding mold 60, load materials, and remove workpieces during the production operation of the rotational molding mold 60, thereby improving production efficiency.

[0068] The assembly / disassembly platform 31 includes a fixed section 31a and a clearance section 31b. The fixed section 31a is fixed to the ground, and both ends of the clearance section 31b are connected to the ground via a lift 32. (See attached diagram in the instruction manual.) Figure 1 and Figure 2 In one assembly / disassembly station module 30, the lifting section of the assembly / disassembly platform 31 is in a low position, where the height of the lifting section is the same as that of the fixed section 31a, allowing workers to walk and stand on the lifting section. In another assembly / disassembly station module 30, the lifting section of the assembly / disassembly platform 31 is in a high position, where the lifting section is higher than the fixed section 31a, creating a clearance space below the lifting section for the mold rotation device 50 and the rotational molding mold 60 to pass through. In other words, in this state, the mold rotation device 50 can move back and forth between the assembly / disassembly station module 30 and the lower housing 12 through the clearance space.

[0069] Example 2: This example is basically the same as Example 1 in structure and principle. The similarities will not be described again. Only the differences will be described. The differences are: the heating component 14 uses electric heating wire to replace the combustion heater, thereby eliminating the need for exhaust gas forced exhaust device 13; electric heating wire is installed on both the upper box 11 and the lower box 12.

[0070] Example 3: This example is basically the same in structure and principle as Example 1. The similarities will not be repeated here; only the differences will be described. The differences are: the number of hydraulic cylinders 15a in a set of hydraulic cylinders 15a can be adjusted adaptively according to actual conditions, such as 1, 3, or 4. The number of lifting ropes 15b in a set of lifting ropes 15b can also be adjusted adaptively according to actual conditions, such as 2, 3, or 6. Furthermore, the number of lifting ropes 15b connected to one hydraulic cylinder 15a can be adjusted adaptively according to the number of hydraulic cylinders 15a and the number of lifting ropes 15b, such as one hydraulic cylinder 15a connected to one lifting rope 15b, or one hydraulic cylinder 15a connected to three lifting ropes 15b.

[0071] Example 4: This example is basically the same in structure and principle as Example 1. The similarities will not be repeated here; only the differences will be described. The difference lies in the first positioning component 17: The first positioning component 17 includes multiple guide positioning rods fixedly connected to the upper housing 11. These multiple guide positioning rods are arranged longitudinally along the upper mating plane of the upper housing 11. The outer surface of the upper housing 11 has guide positioning surfaces that are adapted to each guide positioning rod. When the lower housing 12 moves upward, the guide positioning surfaces gradually contact the sides of the guide positioning rods, thereby forming a guiding structure. After the lower housing 12 and the upper housing 11 are combined, the guide positioning surfaces and the guide positioning rods form a positioning structure.

[0072] Example 5: This example is basically the same in structure and principle as Example 1. The similarities will not be repeated here; only the differences will be described. The differences lie in the number of plug-socket assemblies 80, the number of translation drive assemblies 33, and the structure of the translation drive assemblies 33 included in the mold translation device. Specifically, the number of plug-socket assemblies 80 and the number and structure of the translation drive assemblies 33 can be adjusted according to actual conditions. There are two sets of plug-socket assemblies 80 and two sets of translation drive assemblies 33, with each set corresponding to one other; or there is one set of plug-socket assemblies 80 and one set of translation drive assemblies 33, with each set corresponding to one other. The translation drive assembly 33 includes a second cylinder or a second electric cylinder.

[0073] Example 6: This example is basically the same as Example 1 in structure and principle. The similarities will not be described again. Only the differences will be described. The difference is the installation method of the avoidance section 31b. The avoidance section 31b is connected to the ground through the guide rail and guide wheel assembly. After the avoidance section 31b is translated, an avoidance space is formed for the mold rotation device 50 and the rotational molding mold 60 to pass through.

Claims

1. An oven for a rotary molding machine, the rotary molding machine comprising a frame (20), an oven (10) located inside the frame (20); the oven (10) comprising an upper body (11) and a lower body (12), the upper body (11) having an upper mating plane, and the lower body (12) having a lower mating plane capable of contacting the upper mating plane; a first rotating shaft (41) fixedly connected to the middle of the upper body (11), the first rotating shaft (41) being rotatably connected to the frame (20); characterized in that, The oven (10) also includes an oil supply module and a lower chamber lifting device (15) connecting the upper chamber (11) and the lower chamber (12); the lower chamber lifting device (15) includes a set of hydraulic cylinders (15a) and a set of lifting ropes (15b). The cylinder body of the hydraulic cylinder (15a) is installed on the upper chamber (11). The cylinder axis of the hydraulic cylinder (15a) is parallel to the upper connecting plane. The lifting rope (15b) is connected to the upper chamber (11) through a reversing wheel (16). One end of the lifting rope (15b) is connected to the lower chamber (12), and the other end of the lifting rope (15b) is connected to the piston rod of the hydraulic cylinder (15a). The oil supply module includes an oil tank, an oil pump, an overflow valve, and a control valve. The oil supply module is connected to the hydraulic cylinder (15a) through a pipeline. The oil supply module is used to control the extension or retraction of the piston rod of the hydraulic cylinder (15a). The oil supply module is also used to control the piston rod of the hydraulic cylinder (15a) to remain in the retracted state. When the piston rod of the hydraulic cylinder (15a) retracts, the piston rod pulls the lower box (12) upward through the lifting rope (15b) so that the lower mating plane contacts the upper mating plane, and the oven (10) is in the mating state.

2. The oven of the oven-type gyratory rotational molding machine according to claim 1, characterized in that, The oil supply module also includes a hydraulic control check valve for maintaining pressure in the hydraulic cylinder (15a) and a synchronization valve for synchronously retracting the piston rods of the two hydraulic cylinders (15a).

3. The oven of the oven-type gyratory rotational molding machine according to claim 1, characterized in that, A set of hydraulic cylinders (15a) includes two hydraulic cylinders (15a), and a set of lifting ropes (15b) includes four lifting ropes (15b). Each hydraulic cylinder (15a) is connected to two lifting ropes (15b). The two hydraulic cylinders (15a) are located on the left and right sides or the front and rear ends of the upper box (11), and the four lifting ropes (15b) are connected to the four corners of the lower box (12). Alternatively, a set of hydraulic cylinders (15a) may include one, three, or four hydraulic cylinders (15a), and a set of lifting ropes (15b) may include two, three, or six lifting ropes (15b).

4. The oven of the oven-type oscillating rotational molding machine according to claim 1, 2, or 3, characterized in that, The oven (10) also includes multiple sets of first positioning components (17) for positioning the position between the upper chamber (11) and the lower chamber (12) when they are in the combined state.

5. The oven of the oven-type gyratory rotational molding machine according to claim 4, characterized in that, The first positioning component (17) includes a first positioning pin (17a) and a first positioning sleeve (17b) sleeved on the first positioning pin (17a); the first positioning pin (17a) is fixedly installed on the upper housing (11), and the first positioning sleeve (17b) is fixedly installed on the lower housing (12); Alternatively, the first positioning component (17) may include a guide positioning rod fixedly connected to the upper housing (11), with multiple guide positioning rods arranged longitudinally along the upper mating plane of the upper housing (11); the outer side of the upper housing (11) may have a guide positioning surface that is adapted to each guide positioning rod; when the lower housing (12) moves from bottom to top, the guide positioning surface contacts the side of the guide positioning rod to form a guide structure and a positioning structure.

6. The oven of the oven-type oscillating rotational molding machine according to claim 1, 2, or 3, characterized in that, The oven (10) also includes multiple sets of second positioning components for positioning the position between the lower chamber (12) and the ground when it is in the split state.

7. The oven of the oven-type gyratory rotational molding machine according to claim 6, characterized in that, The second positioning component includes a guide post fixed to the ground and a guide wheel rotatably mounted on the lower housing (12) and adapted to the guide post; Alternatively, the second positioning component may include a guide post fixed on the ground and a guide wheel rotatably mounted on the lower housing (12) and adapted to the guide post; the second positioning component may also include a second positioning pin and a second positioning sleeve sleeved on the second positioning pin, the second positioning pin being fixed on the ground and the second positioning sleeve being fixed on the lower housing (12).

8. The oven of the oven-type oscillating rotational molding machine according to claim 1, 2, or 3, characterized in that, The oven (10) also includes a heating component (14) for heating the air inside the oven (10). The heating component (14) is a combustion heater. The combustion heater is installed on the upper chamber (11). The upper chamber (11) is equipped with a waste gas exhaust device (13) for extracting the gas from the inside of the oven (10). The waste gas exhaust device (13) includes a fan (13a). The air inlet of the fan (13a) is connected to the inside of the upper chamber (11) through a set of first pipes (13b). Alternatively, the oven (10) may also include a heating assembly (14) for heating the air inside the oven (10), the heating assembly (14) being an electric heating wire mounted on the upper chamber (11) and the lower chamber (12).

9. The oven of the oven-type oscillating rotational molding machine according to claim 1, 2, or 3, characterized in that, The lower housing (12) includes a lower housing body (12a), a left side wall (12b) and a right side wall (12c). The bottom edges of the left side wall (12b) and the right side wall (12c) are connected to the lower housing body (12a) by hinges. The left side wall (12b) and the right side wall (12c) can be opened or closed. The left side wall (12b) and the right side wall (12c) are also connected to the lower housing body (12a) by a first cylinder or a first electric cylinder (12d).

10. The oven of the oven-type oscillating rotational molding machine according to claim 1, 2, or 3, characterized in that, The oven (10) type swing rotation molding machine includes a mold rotation device (50), which includes a support (51) and a mold mounting frame (52) for mounting the rotation molding mold (60). The support (51) is slidably connected to the lower box body (12a) of the lower box body (12). The support (51) and the mold mounting frame (52) are connected by a second rotating shaft (53). A second motor (54) is mounted on the support (51). The main shaft of the second motor (54) is connected to the second rotating shaft (53) through a first transmission assembly (55). A conical positioning sleeve (57) is fixed on the support (51), and a conical positioning pin (18) that is compatible with the conical positioning sleeve (57) is fixed on the upper box (11) of the oven (10); when the upper box (11) and the lower box (12) of the oven (10) are in a combined state, the conical positioning pin (18) is inserted into the conical positioning sleeve (57), and the conical positioning pin (18) and the conical positioning sleeve (57) form a positioning structure.

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