A fully automatic pipeline polyurethane casting and molding equipment

Abstract

The present invention relates to a fully automatic pipeline polyurethane casting and molding device, which includes an annular track. A number of molding mechanisms are provided on the annular track. An annular chain and a driving assembly for driving the annular chain to drive are provided inside the annular track. The molding mechanism is connected to the annular chain and is driven by the annular chain. The molding mechanism includes a chassis. A lower mold frame and an upper template hinged on the lower mold frame are provided on the chassis. A lower mold is provided on the lower mold frame, and an upper mold that fits with the lower mold is fixedly connected to the upper template. An opening and closing mold mechanism is provided between the upper template and the lower mold frame. The device realizes the continuous cyclic movement of the molding mechanism through the annular track and the chain drive system, improving the production efficiency; at the same time, the design of the opening and closing mold mechanism ensures that each mold can automatically complete the opening and closing mold actions, reducing manual intervention and enhancing the degree of automation of production. In addition, this structure is conducive to achieving a compact layout and saving space.

Description

Technical Field

[0001] The present invention relates to the technical field of polyurethane casting molding, and in particular to a fully automatic production line polyurethane casting molding device. Background Art

[0002] In the manufacturing process of polyurethane products, casting molding is a common processing method, in which liquid polyurethane material is injected into a mold and cured to form a product with the required shape. Traditional polyurethane casting molding devices are usually single-station operations, that is, only one mold can be processed at a time. This mode is not only inefficient but also difficult to achieve automated and continuous production.

[0003] With the development trend of the industry and the continuous pursuit of high-efficiency production systems, the market's demand for automated production equipment that can improve production efficiency, reduce labor costs, and have high precision and stability is increasing day by day. Against this background, various forms of automated production line polyurethane casting molding devices have emerged, aiming to improve production efficiency through an integrated solution.

[0004] However, the existing automated production line polyurethane casting molding devices still have some limitations. For example, some designs do not fully consider the smoothness and accuracy of the mold opening and closing actions; some devices are not flexible enough in mold transfer, affecting the speed and smooth operation of the entire production line. Summary of the Invention

[0005] The present invention provides a fully automatic production line polyurethane casting molding device, which ensures that each mold can accurately complete the process from closing to opening, and at the same time realizes the continuous movement of the mold on the entire circular path, solving the above problems existing in the prior art during use.

[0006] The technical solution of the present invention is realized as follows: A fully automatic production line polyurethane casting molding device includes a circular track, and a plurality of molding mechanisms are provided on the circular track. An endless chain and a driving component for driving the endless chain to transmit are provided inside the circular track. The molding mechanism is connected to the endless chain and is driven by the endless chain. The molding mechanism includes a chassis, a lower mold frame is provided on the chassis, and an upper template is hinged on the lower mold frame. A lower mold is provided on the lower mold frame, and an upper mold that fits with the lower mold is fixedly connected to the upper template. An opening and closing mold mechanism is provided between the upper template and the lower mold frame.

[0007] By adopting the above technical solutions, the device realizes the continuous cyclic motion of the forming mechanism through the annular track and the chain drive system, improving the production efficiency; meanwhile, the design of the mold opening and closing mechanism ensures that each mold can automatically complete the mold opening and closing actions, reducing manual intervention and enhancing the degree of automation of production. In addition, this structure is conducive to achieving a compact layout and saving space.

[0008] The present invention is further configured as follows: a plurality of lower die swing angle ears are fixedly connected to the front side of the chassis, locking seats corresponding to the lower die swing angle ears are fixedly connected to the front side of the lower die holder, a hinge rod is rotatably connected to the lower die swing angle ear, the other end of the hinge rod is rotatably connected to the locking seat, the mold opening and closing mechanism includes a mold opening and closing cylinder, a cylinder seat is fixedly connected to the rear side of the upper template, the mold opening and closing cylinder is rotatably connected to the cylinder seat, a connecting seat is fixedly connected to the rear side of the lower die holder, the piston rod of the mold opening and closing cylinder is rotatably connected to the connecting seat, and a plurality of wheel sets are fixedly connected to the rear side of the lower die holder, and the wheel sets are used for rolling on the chassis.

[0009] By adopting the above technical solutions, the design of the lower die swing angle ear, the locking seat and the hinge rod simplifies the connection mode between the upper template and the lower die holder, making the mold opening and closing process more stable and reliable. Using the mold opening and closing cylinder as the power source can accurately control the speed and force of mold opening and closing, ensuring the safety and accuracy of the operation, and at the same time facilitating maintenance and adjustment. When opening the mold, with the push of the cylinder, the upper template drives the upper die to open relative to the lower die. During this process, the front side of the lower die holder is pushed forward and lifted upward. The entire mold opening process is stable, and the wheel sets provide a smooth support for the forward movement of the rear side of the lower die holder.

[0010] The present invention is further configured as follows: a lower template is fixedly connected to the lower end of the lower die, there is a gap between the lower template and the lower die holder, guide columns are fixedly connected to the outer four corners of the lower template, guide sleeves are fixedly connected to the outer four corners of the lower die holder, the guide columns are movably fitted on the guide sleeves, compression springs are sleeved on the guide columns, and both ends of the compression springs respectively abut against the lower template and the guide sleeves.

[0011] By adopting the above technical solutions, the cooperation of the guide columns and the guide sleeves and the application of the compression springs provide a guiding and supporting effect for the lower die, and can provide appropriate pre-pressure during mold closing, which helps to improve the forming accuracy and product quality. The existence of the compression springs can also absorb part of the impact force and protect the mold from damage.

[0012] The present invention is further configured as follows: an airbag plate is fixedly connected to the lower side of the lower template of the lower die holder, an airbag is fixedly arranged on the upper side of the airbag plate, and an air vent is provided on the airbag and passes downward through the airbag plate.

[0013] By adopting the above technical solution, an airbag plate and an airbag are introduced. During the mold closing process, additional pressure can be provided through inflation to ensure tight contact between the molds, thereby improving the pouring molding effect and reducing product defects.

[0014] The present invention is further configured as follows: A locking rod is fixedly connected to the locking seat, a plurality of mounting seats are fixedly connected to the front side of the upper template, a hook is rotatably connected to the mounting seat, the hook includes a hook portion for hooking the locking rod when the upper mold and the lower mold are closed, a long rod is fixedly connected to the rear end of the hook, a mold locking cylinder seat is fixedly connected to the upper side of the locking seat, a mold locking cylinder is rotatably arranged on the mold locking cylinder seat, a mold locking connecting rod is rotatably connected to the piston rod of the mold locking cylinder, and the mold locking connecting rod is connected to the long rod.

[0015] By adopting the above technical solution, the locking device composed of the locking rod, the hook, the mold locking cylinder, etc. can firmly fix the upper and lower molds together in the closed mold state, preventing the mold from loosening due to external vibration or pressure changes generated by the internal airbag and spring, and ensuring the stability of the molding process. The mechanism driven by the mold locking cylinder also increases the flexibility and response speed of the system.

[0016] The present invention is further configured as follows: A knockout rod is provided on the lower mold, a knockout through hole is opened on the lower mold, the knockout through hole penetrates downward through the lower template, the knockout rod is slidably arranged on the knockout through hole, and a knockout driving mechanism is provided below the knockout rod for driving the knockout rod to move upward when the upper mold and the lower mold are opened.

[0017] By adopting the above technical solution, the design of the knockout rod allows the finished product to be automatically ejected after demolding, avoiding the inconvenience and potential risks brought by manual part taking. The knockout driving mechanism ensures the smoothness of the ejection action and improves the work efficiency.

[0018] The present invention is further configured as follows: The knockout driving mechanism includes a driving rod, a middle connecting rod, a limiting column, and a mounting bracket. An operation opening is provided on the airbag and the airbag plate, a fixed plate is fixedly connected to the lower side of the operation opening of the airbag plate, the driving rod is rotatably connected to the fixed plate, the two ends of the middle connecting rod are respectively rotatably connected to the knockout rod and the driving rod, the mounting bracket is fixedly connected to the chassis, the two ends of the limiting column are connected to the mounting bracket, and a movable long groove is opened along the length direction of the driving rod, and the limiting column is located in the movable long groove.

[0019] By adopting the above technical solution, this structure realizes the upward lifting of the knockout rod when the mold is opened and the automatic downward reset when the mold is closed through components such as the driving rod and the middle connecting rod. The design of the limiting column and the movable long groove limits the movement range of the driving rod, ensuring the accuracy and safety of the knockout action. This design not only improves the operation convenience but also enhances the reliability and durability of the system.

[0020] The present invention is further configured such that: a limiting plate is fixedly connected to the upper end of the ejector rod, a receiving limiting groove for receiving the limiting plate is formed on the lower die, movable openings are formed at both ends of the limiting column on the mounting bracket, sliders slidably arranged in the movable openings are fixedly connected to both ends of the limiting column, and a positioning spring located behind the sliders is arranged in the movable opening of the mounting bracket.

[0021] By adopting the above technical solution, the design of the limiting plate and the receiving limiting groove prevents the ejector rod from completely withdrawing from the ejector through-hole, ensuring that the upper side of the limiting plate is flush with the bottom of the lower die. In addition, the limiting column is slidably arranged in the movable opening through the slider and is positioned by the positioning spring, which can help avoid excessive requirements for the accuracy of this structure and also avoid the problem of jamming caused by the upper die and the lower die not being fully closed while the limiting plate has completely entered the receiving limiting groove. In addition, in the production process where the material needs to be injected into the lower die first when the upper die and the lower die are in the open state and then the upper die and the lower die are completely closed for molding, this structure can make the ejector rod reset downward until the limiting plate enters the receiving limiting groove, but the upper die and the lower die are not fully closed. At this time, the material is poured into the lower die, and then the upper and lower dies are completely closed. During the subsequent closing process, the limiting column can drive the slider to compress the positioning spring and move backward, thus ensuring the accurate completion of the closing without jamming and ensuring that the presence of the ejector rod does not affect the pouring of the material into the lower die in the open state.

[0022] The present invention is further configured such that: a guide rod is fixedly connected in the movable opening of the mounting bracket, a positioning sliding opening for the guide rod to pass through is formed on the slider, and the positioning spring is sleeved on the guide rod.

[0023] By adopting the above technical solution, the combination of the guide rod and the positioning sliding opening and the positioning spring sleeved on the guide rod further enhances the guiding performance of the slider and the positioning spring, maintaining the stability of the structure.

[0024] The present invention is further configured such that: a die holder chain connecting ear is connected to the rear side of the lower die holder, a cross-bridge block is rotatably connected to the die holder chain connecting ear, a cross-bridge connecting block is rotatably connected to the cross-bridge block, the cross-bridge connecting block is connected to an annular chain, positioning idler wheels are arranged below both the left and right sides of the lower die holder, a positioning track for the positioning idler wheels to movably cooperate with is arranged on the annular track, and a control electric box group connected to the annular chain is also arranged on the annular track.

[0025] By adopting the above technical solution, the design of the die carrier chain connection ear, the cross-bridge block and the cross-bridge connection block enables the forming mechanism to be more firmly connected to the endless chain, ensuring its synchronous movement with the chain. The cooperation of the positioning idler wheel and the positioning track ensures the accurate operation of the forming mechanism along the predetermined path, while the control electric box group is responsible for coordinating the work of each component and maintaining the overall rhythm of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the overall structure of the present invention;

[0028] Figure 2 Schematic diagram of the structure of the present invention after removing a part of the forming mechanism;

[0029] Figure 3 For Figure 2 Partial enlarged schematic diagram at position A in

[0030] Figure 4 Schematic diagram of the structure of the endless track and the endless chain part in the invention;

[0031] Figure 5 First schematic diagram of the forming mechanism in the present invention;

[0032] Figure 6 Second schematic diagram of the forming mechanism in the present invention;

[0033] Figure 7 Third schematic diagram of the forming mechanism in the present invention;

[0034] Figure 8 Fourth schematic diagram of the forming mechanism in the present invention;

[0035] Figure 9 Schematic diagram of the structure of the forming mechanism in the present invention after removing a part of the chassis;

[0036] Figure 10 Top view of the forming mechanism in the present invention;

[0037] Figure 11 For Figure 10 Cross-sectional structure schematic diagram at A-A;

[0038] Figure 12It is a structural schematic diagram of the upper die, ejector rod, drive rod, middle connecting rod and mounting bracket parts in the present invention;

[0039] Figure 13 It is a structural schematic diagram of the mounting bracket and limit post parts in the present invention.

[0040] In the figure: 1, annular track; 2, annular chain; 3, sprocket; 4, reduction motor; 5, forming mechanism; 6, chassis; 7, lower die holder; 8, upper template; 9, lower die; 10, upper die; 11, lower template; 12, airbag plate; 13, airbag; 14, ventilation port; 15, lower die swing angle ear; 16, locking seat; 17, hinge rod; 18, mold opening and closing cylinder; 19, cylinder seat; 20, connecting seat; 21, wheel set; 22, guide post; 23, guide sleeve; 24, compression spring; 25, lock rod; 26, mounting seat; 27, hook; 28, hook part; 29, long rod; 30, mold locking cylinder seat; 31, mold locking cylinder; 32, mold locking connecting rod; 33, ejector rod; 34, ejector through hole; 35, drive rod; 36, middle connecting rod; 37, limit post; 38, mounting bracket; 39, operation port; 40, fixed plate; 41, movable long slot; 42, limit plate; 43, accommodation limit slot; 44, movable port; 45, slider; 46, positioning spring; 47, guide rod; 48, positioning sliding port; 49, mold holder chain connection ear; 50, bridge block; 51, bridge connection block; 52, positioning idler wheel; 53, positioning track; 54, control electric box group. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying Figure 1-13 , obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] Embodiment:

[0043] Such as Figures 1 to 13As shown in the figure, the present invention discloses a fully automatic pipeline polyurethane casting and molding device, which includes an annular track 1. A number of molding mechanisms 5 are provided on the annular track 1. An annular chain 2 and a driving assembly for driving the annular chain 2 to transmit are arranged inside the annular track 1. The driving assembly includes two sprockets 3 and a reduction motor 4 for driving the sprockets 3 to rotate. The reduction motor 4 drives the sprockets 3 to drive the annular chain 2 to transmit. Among them, the molding mechanism 5 is connected to the annular chain 2 and is driven by the annular chain 2. The molding mechanism 5 specifically includes a chassis 6. A lower mold frame 7 and an upper template 8 hinged on the lower mold frame 7 are provided on the chassis 6. A lower mold 9 is provided on the lower mold frame 7. An upper mold 10 for fitting with the lower mold 9 is fixedly connected to the upper template 8. An opening and closing mold mechanism is provided between the upper template 8 and the lower mold frame 7. In actual production, a pouring head can be arranged on one side of the annular track 1 to pour polyurethane material between the upper mold 10 and the lower mold 9. Through the continuous driving of the annular track 1 and the annular chain 2, the molding mechanism 5 performs continuous cyclic motion. After pouring is completed, it moves away. After cooling and molding for a certain period of time, the mold is opened to take out the molded article, and then the upper and lower molds are cleaned and cooled, and then transported back to the pouring position to pour the material again. Such a cycle is repeated. This structure has a high degree of automation, a compact structure layout, and high production efficiency.

[0044] Specifically, a number of lower mold swing angle ears 15 are fixedly connected to the front side of the chassis 6, and a locking seat 16 corresponding to the lower mold swing angle ears 15 is fixedly connected to the front side of the lower mold frame 7. A hinge rod 17 is rotatably connected to the lower mold swing angle ears 15, and the other end of the hinge rod 17 is rotatably connected to the locking seat 16. An opening mold ear part 55 is fixedly connected to the rear side of the lower mold frame 7, and an upper mold opening and closing ear 56 rotatably connected to the opening mold ear part 55 is provided on the rear side of the upper template 8. Among them, the opening and closing mold mechanism includes an opening and closing mold cylinder 18. The rear side of the upper template 8 is fixedly connected with a cylinder seat 19, and the opening and closing mold cylinder 18 is rotatably connected to the cylinder seat 19. A connecting seat 20 is fixedly connected to the rear side of the lower mold frame 7, and the piston rod of the opening and closing mold cylinder 18 is rotatably connected to the connecting seat 20. A number of wheel sets 21 are fixedly connected to the rear side of the lower mold frame 7, and the wheel sets 21 are used for rolling on the chassis 6. As Figures 5 to 8 shown, it is a structural diagram of the molding mechanism 5 of the present invention after the upper mold 10 and the lower mold 9 are opened. When opening the mold, with the push of the opening and closing mold cylinder 18, the upper template 8 drives the upper mold 10 to open relative to the lower mold 9. During this process, the front side of the lower mold frame 7 is pushed forward and lifted upward. The entire mold opening process is smooth and stable. The wheel sets 21 provide smooth support for the forward movement of the rear side of the lower mold frame 7. When closing the mold, with the pulling back of the piston rod of the opening and closing mold cylinder 18, the lower mold frame 7 moves backward, and the upper mold 10 covers the lower mold 9.

[0045] In the present invention, the lower end of the lower die 9 is fixedly connected to a lower template 11. There is a gap between the lower template 11 and the lower die holder 7. Moreover, guide posts 22 are fixedly connected to the four corners on the outer side of the lower template 11, and guide sleeves 23 are fixedly connected to the four corners on the outer side of the lower die holder 7. The guide posts 22 are movably fitted on the guide sleeves 23. Additionally, a compression spring 24 is sleeved on the guide posts 22. The two ends of the compression spring 24 respectively abut against the lower template 11 and the guide sleeve 23. The compression spring 24 is used to support the lower template 11 and the lower die 9, maintain the gap between the lower template 11 and the lower die holder 7, and can provide an appropriate pre-pressure when the upper die 10 and the lower die 9 are closed, which helps to improve the forming accuracy and product quality. In addition, the presence of the compression spring 24 can also absorb part of the impact force and protect the mold from damage.

[0046] Furthermore, the lower die holder 7 is also fixedly connected with an airbag plate 12 on the lower side of the lower template 11, and an airbag 13 is fixedly arranged on the upper side of the airbag plate 12. An air vent 14 is provided on the lower side of the airbag 13 and passes downward through the airbag plate 12. After the upper die 10 and the lower die 9 are closed, by injecting gas into the airbag 13 through the air vent 14, the airbag 13 can expand to fill the gap between the lower die holder 7 and the lower template 11 and squeeze the lower template 11 upward, thereby ensuring the close contact between the molds, improving the pouring molding effect, and reducing product defects.

[0047] In order to lock the upper die 10 and the lower die 9 after they are closed, a locking rod 25 is fixedly connected to the locking seat 16, and a plurality of mounting seats 26 are fixedly connected to the front side of the upper template 8. A hook 27 is rotatably connected to the mounting seat 26. The hook 27 includes a hook portion 28 for hooking the locking rod 25 when the upper die 10 and the lower die 9 are closed. A long rod 29 is fixedly connected to the rear end of the hook 27, and a mold locking cylinder seat 30 is fixedly connected to the upper side of the locking seat 16. A mold locking cylinder 31 is rotatably arranged on the mold locking cylinder seat 30. A mold locking connecting rod 32 is rotatably connected to the piston rod of the mold locking cylinder 31. The mold locking connecting rod 32 is connected to the long rod 29. After the upper die 10 and the lower die 9 are closed, the mold locking cylinder 31 pushes forward, drives the long rod 29 through the mold locking connecting rod 32, and then drives the hook 27 to swing downward, so that the hook portion 28 of the hook 27 hooks the locking rod 25 on the locking seat 16. Therefore, the upper and lower dies 9 can be firmly fixed together in the closed state, preventing the mold from loosening due to external vibration or pressure changes generated by the internal airbag 13 and compression spring 24, and ensuring the stability of the forming process. The driving mechanism of the mold locking cylinder 31 also increases the flexibility and response speed of the system. When mold opening is required, after the gas in the airbag 13 is discharged, the mold locking cylinder 31 drives the mold locking connecting rod 32 to retract backward, and the long rod 29 will drive the hook 27 to swing upward, so that the hook portion 28 disengages from the locking rod 25, and then mold opening can be performed.

[0048] In order to enable the present invention to automatically eject the formed material when the mold is opened, so as to facilitate the workers to quickly take out the material and improve the degree of automation. Therefore, the present invention is provided with a knockout rod 33 on the lower mold 9, and a knockout through hole 34 is opened on the lower mold 9. And the knockout through hole 34 penetrates downward through the lower template 11, and the knockout rod 33 is slidably arranged on the knockout through hole 34. A knockout driving mechanism is provided below the knockout rod 33 for driving the knockout rod 33 to move upward when the upper mold 10 and the lower mold 9 are opened.

[0049] Specifically, the knockout driving mechanism includes a driving rod 35, a middle connecting rod 36, a limiting column 37 and a mounting bracket 38. An operation opening 39 is opened on the airbag 13 and the airbag plate 12. The operation opening 39 is used to facilitate the driving rod 35 and the middle connecting rod 36 to pass through and rotate. A fixed plate 40 is fixedly connected to the lower side of the operation opening 39 of the airbag plate 12. The driving rod 35 is rotatably connected to the fixed plate 40. The two ends of the middle connecting rod 36 are respectively rotatably connected to the knockout rod 33 and the driving rod 35. Among them, the mounting bracket 38 is fixedly connected to the chassis 6, and the two ends of the limiting column 37 are connected to the mounting bracket 38. A movable long groove 41 is opened on the driving rod 35 along its length direction. The limiting column 37 is located in the movable long groove 41. During the process of mold opening, since the lower mold base 7 part will be pushed forward as a whole, the driving rod 35 will swing around the rotating shaft rotatably connected to the fixed plate 40 due to the limitation of the limiting column 37, so as to drive the knockout rod 33 to eject upward through the middle connecting rod 36. When the mold is closed, the lower mold base 7 part is reset backward as a whole, and the driving rod 35 drives the knockout rod 33 to retract through the rotation of the middle connecting rod 36. Among them, the design of the limiting column 37 and the movable long groove 41 limits the moving range of the driving rod 35, ensuring the accuracy and safety of the knockout action. This design not only improves the convenience of operation, but also enhances the reliability and durability of the system. This structure considers the overall movement track of the lower mold base 7 when the whole upper and lower molds are opened, and uses its movement track to achieve the effect of automatic mold opening.

[0050] Further, a limiting plate 42 is fixedly connected to the upper end of the ejector rod 33, and a receiving limiting groove 43 for receiving the limiting plate 42 is formed in the lower die 9. When the limiting plate 42 completely enters the receiving limiting groove 43, the upper end of the limiting plate 42 is flush with the bottom on the upper side of the lower die 9. Further, the mounting bracket 38 is provided with movable openings 44 at both ends of the limiting post 37, and both ends of the limiting post 37 are fixedly connected with sliders 45 slidably arranged in the movable openings 44. The mounting bracket 38 is provided with a positioning spring 46 located behind the sliders 45 in the movable openings 44. The positioning spring 46 is used to maintain the position of the limiting post 37. When the mold is closed, the lower die holder 7 moves backward. Due to the limitation of the limiting post 37, the driving rod 35 drives the ejector rod 33 to retract by rotating through the middle connecting rod 36. When the limiting plate 42 enters the receiving limiting groove 43, the ejector rod 33 can no longer move downward. At this time, if the upper die 10 and the lower die 9 are not completely closed, the lower die holder 7 still needs to move backward. Then, if the limiting post 37 is fixed on the mounting bracket 38, it will be stuck. Through the setting of this structure, when the ejector rod 33 can no longer move downward, the limiting post 37 can move backward by compressing the positioning spring 46 through the slider 45, so as to ensure the continuous closing of the upper die 10 and the lower die 9. In addition, it should be noted that during the pouring process of this example, polyurethane material needs to be poured into the lower die 9 through the pouring head first, and then the upper and lower dies are closed. Therefore, before pouring, this structure can first close the upper die 10 and the lower die 9 to a certain extent until the limiting plate 42 enters the receiving limiting groove 43. Because if the ejector rod 33 is in the ejected state, it will affect the pouring of the polyurethane material and the subsequent molding effect. Therefore, after the limiting plate 42 on the ejector rod 33 enters the receiving limiting groove 43 and the upper die 10 and the lower die 9 are still not completely closed, pouring can be carried out. At this time, the material is injected into the lower die 9, and then the complete closing is carried out. Generally, the automatic ejection mechanism linked with the movement of the upper and lower dies ejects completely when the mold is opened and resets completely when the mold is completely closed. Therefore, the structure of the present invention can reset the ejector rod in advance when the upper die 10 and the lower die 9 are not completely closed, which is convenient for pouring the polyurethane material and does not interfere with the subsequent continuous closing of the upper die 10 and the lower die 9.

[0051] Furthermore, a guiding rod 47 is fixedly connected to the mounting bracket 38 in the movable opening 44, and a positioning sliding opening 48 for the guiding rod 47 to pass through is formed in the slider 45. The positioning spring 46 is sleeved on the guiding rod 47. The combination of the guiding rod 47 and the positioning sliding opening 48 and the positioning spring 46 sleeved on the guiding rod 47 further enhances the guiding performance of the slider 45 and the positioning spring 46 and maintains the stability of the structure.

[0052] The specific structure of the forming mechanism 5 connected to the annular chain 2 is as follows: A die carrier chain connecting ear 49 is connected to the rear side of the lower die carrier 7. A cross-bridge block 50 is rotatably connected to the die carrier chain connecting ear 49, and a cross-bridge connecting block 51 is rotatably connected to the cross-bridge block 50. The cross-bridge connecting block 51 is connected to the annular chain 2. In addition, positioning rollers 52 are provided below the left and right sides of the lower die carrier 7, and a positioning track 53 for the positioning rollers 52 to movably cooperate with is provided on the annular track 1. Specifically, the positioning track 53 is located on the straight section of the annular track 1. In addition, a control electrical box group 54 connected to the annular chain 2 is also provided on the annular track 1. For the power transmission of the present invention, a ring-shaped slip ring device can be provided on the annular track 1 for power supply, and the control electrical box group 54 has a conductive device that allows power transmission through sliding contact with the slip ring device. By supplying power to the control electrical box group 54, since the control electrical box group 54 and the forming mechanism 5 move synchronously along with the annular chain 2, electrical energy can be transmitted to each forming mechanism 5 by connecting the control electrical box group 54 and each forming mechanism 5 through wires. In addition, for the gas transmission, an air pump and a control valve body can be provided in the control electrical box group 54 to supply gas to the cylinders and air bags 13 of each forming mechanism 5, or an air pump and a control valve body can also be provided on the chassis 6 of each forming mechanism 5 to supply gas to the cylinders and air bags 13 on the forming mechanism 5. Since the technologies for transmitting electricity to the control electrical box group 54 and gas transmission are prior arts and have been widely used, the specific structures will not be described in detail herein.

[0053] It should be noted that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the protection scope of the present invention.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic production line polyurethane casting and molding equipment, characterized in that: It includes an annular track, on which several forming mechanisms are provided. An annular chain and a driving assembly for driving the annular chain to transmit are provided inside the annular track. The forming mechanism is connected to the annular chain and is driven by the annular chain. The forming mechanism includes a chassis, on which a lower die holder and an upper template hinged to the lower die holder are provided. A lower die is provided on the lower die holder, and an upper die that fits with the lower die is fixedly connected to the upper template. An opening and closing die mechanism is provided between the upper template and the lower die holder. Several lower die swing angle ears are fixedly connected to the front side of the chassis, and locking seats corresponding to the lower die swing angle ears are fixedly connected to the front side of the lower die holder. An articulated rod is rotatably connected to the lower die swing angle ear, and the other end of the articulated rod is rotatably connected to the locking seat. The opening and closing die mechanism includes an opening and closing die cylinder. A cylinder seat is fixedly connected to the rear side of the upper template, and the opening and closing die cylinder is rotatably connected to the cylinder seat. A connecting seat is fixedly connected to the rear side of the lower die holder, and the piston rod of the opening and closing die cylinder is rotatably connected to the connecting seat. Several wheel sets are fixedly connected to the rear side of the lower die holder, and the wheel sets are used for rolling on the chassis. A lower template is fixedly connected to the lower end of the lower die, and there is a gap between the lower template and the lower die holder. Guide columns are fixedly connected to the four corners on the outside of the lower template, and guide sleeves are fixedly connected to the four corners on the outside of the lower die holder. The guide columns are movably fitted on the guide sleeves. Compression springs are sleeved on the guide columns, and the two ends of the compression springs respectively abut against the lower template and the guide sleeves. An airbag plate is fixedly connected to the lower side of the lower template of the lower die holder, and an airbag is provided on the upper side of the airbag plate. An air vent that passes through the airbag plate downward is provided on the airbag. A knockout rod is provided on the lower die, and a knockout through hole is opened on the lower die. The knockout through hole passes through the lower template downward. The knockout rod is slidably arranged on the knockout through hole. A knockout driving mechanism for driving the knockout rod to move upward when the upper die and the lower die are opened is provided below the knockout rod. The knockout driving mechanism includes a driving rod, a middle connecting rod, a limiting column, and a mounting bracket. An operation port is opened on the airbag and the airbag plate. A fixed plate is fixedly connected to the lower side of the operation port of the airbag plate. The driving rod is rotatably connected to the fixed plate. The two ends of the middle connecting rod are respectively rotatably connected to the knockout rod and the driving rod. The mounting bracket is fixedly connected to the chassis, and the two ends of the limiting column are connected to the mounting bracket. An activity long groove is opened on the driving rod along its length direction, and the limiting column is located in the activity long groove.

2. The fully automatic pipeline polyurethane casting and molding equipment according to claim 1, characterized in that: A locking rod is fixedly connected to the locking seat. Several mounting seats are fixedly connected to the front side of the upper template, and a hook is rotatably connected to the mounting seat. The hook includes a hook portion for hooking the locking rod when the upper die and the lower die are closed. A long rod is fixedly connected to the rear end of the hook. A die locking cylinder seat is fixedly connected to the upper side of the locking seat, and a die locking cylinder is rotatably arranged on the die locking cylinder seat. A die locking connecting rod is rotatably connected to the piston rod of the die locking cylinder, and the die locking connecting rod is connected to the long rod.

3. The fully automatic pipeline polyurethane casting and molding equipment according to claim 1, characterized in that: The upper end of the ejector rod is fixedly connected with a limit plate. A limit accommodating groove for accommodating the limit plate is formed on the lower die. The mounting bracket is provided with movable openings at both ends of the limit post. Both ends of the limit post are fixedly connected with sliders slidably arranged in the movable openings. The mounting bracket is provided with a positioning spring located behind the sliders in the movable openings.

4. An automatic production line polyurethane casting molding device according to claim 3, characterized in that: The mounting bracket is fixedly connected with a guide rod in the movable opening. The slider is provided with a positioning sliding opening for the guide rod to pass through. The positioning spring is sleeved on the guide rod.

5. A fully automatic pipeline polyurethane casting and molding device according to claim 1, characterized in that: A die holder chain connecting ear is connected to the rear side of the lower die holder. A cross bridge block is rotatably connected to the die holder chain connecting ear. A cross bridge connecting block is rotatably connected to the cross bridge block. The cross bridge connecting block is connected to the annular chain. Positioning idler wheels are arranged below both the left and right sides of the lower die holder. The annular track is provided with a positioning track for the positioning idler wheels to movably cooperate with. The annular track is also provided with a control electric box group connected to the annular chain.

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