Multi-station automatic low-pressure injection molding machine

Abstract

The invention relates to the technical field of injection molding equipment, and discloses a multi-station automatic low-pressure injection molding machine, which comprises a rotary table, a feeding device, a discharging device and a control device, the mold closing injection molding unit comprises an upper mold assembly and a plurality of lower mold assemblies, the upper mold assembly is connected with a hydraulic cylinder at the top of the machine table, the lower mold assemblies are uniformly distributed on the rotary table, the upper mold assembly is connected with a plastic injection pipe, and position sensors are arranged on the upper mold assembly and the lower mold assemblies; the automatic positioning unit is arranged in the machine table and used for adjusting the position of the driving rotary table, so that the upper die assembly corresponds to the lower die assembly in position. A plurality of injection molding stations are arranged on the rotary table of the injection molding machine, and the upper mold assembly is combined with the lower mold assemblies at different positions, so that injection molding production at each station is realized; the position sensor is adopted to detect the relative position of the mold, and the automatic positioning unit is started to adjust the angle of the rotary table, so that the mold closing accuracy during multi-station operation is improved, and the quality of injection molding finished products is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding equipment, and more specifically, to a multi-station automatic low-pressure injection molding machine. Background Art

[0002] A low-pressure injection molding machine is a device that uses relatively low pressure to process plastic materials during the injection molding process. The low-pressure injection molding process mainly includes three steps: filling, curing, and demolding. First, the molten plastic is injected into the mold through the injection molding machine to fill the entire mold cavity; then, under relatively low pressure, the plastic cools and solidifies to form the desired product; finally, the mold is opened and the product is removed from the mold to complete the entire injection molding process. The efficiency of the injection molding machine is an important factor affecting the production efficiency of plastic finished products.

[0003] In the prior art, such as the utility model patent with application number CN202122671845.1, a multi-station rotary low-pressure injection molding machine is disclosed, which includes: an injection molding machine body, on which a glue port is provided; a glue injection module, which is connected to the glue port and is used to inject glue into the glue port; a multi-station rotary module, which is connected to the injection molding machine body and is used to place and rotate products to be injected, in the process of injection molding, and after injection molding, so as to improve production efficiency, increase speed, and shorten production cycle. However, in actual use, the mold usually adopts a combination of upper and lower molds. During the switching process of each station, due to the transmission error of the rotation process, the accuracy of mold clamping will be affected. There will be deviations after the upper and lower molds are clamped, which will affect the quality of the injection molded product.

[0004] Therefore, it is necessary to propose a multi-station automatic low-pressure injection molding machine to at least partially solve the problems existing in the prior art. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the present invention provides a multi-station automatic low-pressure injection molding machine, comprising:

[0007] A turntable, which is rotatably arranged on the machine platform;

[0008] The mold closing injection unit includes an upper mold assembly and a lower mold assembly. The upper mold assembly is connected to the hydraulic cylinder on the top of the machine platform. The lower mold assembly is provided in multiple pieces and evenly distributed on the turntable. The upper mold assembly is connected to the injection molding pipe. Position sensors are provided on the upper mold assembly and the lower mold assembly.

[0009] The automatic positioning unit is arranged in the machine platform and is used to adjust the position of the driving turntable so that the positions of the upper mold assembly and the lower mold assembly correspond.

[0010] Preferably, four injection molding stations are arranged on the turntable, and each injection molding station is provided with a lower mold assembly, and the upper mold assembly is located above any lower mold assembly.

[0011] Preferably, the automatic positioning unit includes a first angle adjustment unit, and the first angle adjustment unit includes:

[0012] A base, which is connected to the machine platform and has a rotating shaft at the center of the base;

[0013] A first sleeve, the first sleeve is rotatably connected to the top end of the base shaft;

[0014] A second sleeve, the second sleeve is concentrically connected to the first sleeve, and the bottom end of the second sleeve is rotatably arranged on the top end of the base;

[0015] The bearing platform is connected to the top of the first sleeve and is connected to the turntable.

[0016] Preferably, the first angle adjustment unit further includes:

[0017] A transmission gear, the transmission gear is rotatably connected to the outer wall of the second sleeve;

[0018] A first motor, the first motor is mounted on the inner wall of the second sleeve, and an output shaft of the first motor is connected to the transmission gear;

[0019] The gear ring is connected to the base and is coaxially arranged on the outside of the second sleeve. The gear ring is meshed and connected with the bottom end of the transmission gear.

[0020] Preferably, the automatic positioning unit includes a second angle adjustment unit, and the second angle adjustment unit includes:

[0021] A first friction disc, the first friction disc is rotatably connected to one side of the top end of the bearing platform;

[0022] A second motor, the second motor is installed at the bottom of the bearing platform, and the output shaft is connected to the first friction disk;

[0023] The second friction disc is rotatably connected to the center of the top end of the bearing platform and is concentrically arranged with the bearing platform. The second friction disc is in contact with and connected to the first friction disc, and the top end of the second friction disc is connected to the turntable.

[0024] Preferably, the automatic positioning unit further includes a balance adjustment unit, and the balance adjustment unit includes:

[0025] A central axis, the central axis is connected to the center of the top of the bearing platform;

[0026] A sphere, which is connected to the top of the central axis;

[0027] The tray has a balancing block at the bottom center of the tray, the balancing block is rotatably connected with the ball to form a ball pair, and the turntable is connected to the top of the tray.

[0028] Preferably, the balance adjustment unit further includes:

[0029] A rotating sleeve, which is sleeved on the outside of the central shaft and has a bottom end connected to the second friction disc;

[0030] A first balancing rod, wherein two first balancing rods are symmetrically arranged on both sides of the rotating sleeve, and the center of the balancing rod is rotatably connected to the rotating sleeve;

[0031] Support rods, two support rods are provided and symmetrically connected to both sides of the bottom end of the tray;

[0032] The second balancing pole is arranged between the two ends of the first balancing poles, and the two ends of the second balancing pole are respectively hinged to the first balancing poles and the supporting poles.

[0033] Preferably, the balance adjustment unit further includes: a third motor, the third motor is mounted on the second friction disk, and the output shaft of the third motor is centrally connected to one of the first balance bars.

[0034] Preferably, the automatic positioning unit further includes a balance detection unit, and the balance detection unit includes:

[0035] A slide rail, which is horizontally arranged on the upper part of the machine platform and located on one side of the upper mold assembly;

[0036] The slide seat is slidably connected to the slide rail, two upper limit slide posts and one lower limit slide post are respectively arranged on both sides of the slide seat, and the track of the slide rail is arranged between the upper limit slide post and the lower limit slide post;

[0037] The detection cylinder is connected to the bottom end of the slide and is close to the turntable surface.

[0038] Preferably, the balance detection unit also includes: a fourth motor, a roller and several guide wheels. The fourth motor and the two rollers are all installed on the base. The output end of the fourth motor is connected to the two rollers at the same time through a pulley assembly. A traction rope is wrapped around the two rollers, and the traction rope passes through the lower part of the base, is guided by the guide wheels, and is connected to both ends of the slide.

[0039] Preferably, the top end of the detection tube is connected to the gas supply device, and the bottom end of the detection tube is provided with a cleaning unit, which includes:

[0040] Nozzle, the nozzle is connected to the bottom of the detection tube, and the nozzle is set in a cone shape;

[0041] A detection rod, the top of which is connected to the inner wall of the nozzle through a first bracket, an air flow channel is arranged at the center of the detection rod, an upwardly inclined air inlet is arranged at the top of the detection rod, and a downwardly inclined air outlet is arranged on the side of the detection rod, and both the air inlet and the air outlet are connected to the air flow channel; a detection head is arranged at the bottom of the detection rod, and the detection head is electrically connected to the controller;

[0042] The guide ring is connected to the detection rod through the second bracket, the edge of the guide ring is set to be an arc shape, and the diameter of the guide ring is smaller than the diameter of the bottom end of the nozzle.

[0043] Compared with the prior art, the present invention has at least the following beneficial effects:

[0044] The present invention provides a multi-station automatic low-pressure injection molding machine, on which a rotating turntable is arranged, and a plurality of injection molding stations are arranged on the turntable. The injection molding production at each station is realized by combining an upper mold assembly with a lower mold assembly at different positions. A position sensor is used to detect the relative position of the mold, and based on this, an automatic positioning unit is started to adjust the turntable angle, thereby improving the accuracy of mold closing during multi-station operation and effectively ensuring the quality of the injection molded product.

[0045] The multi-station automatic low-pressure injection molding machine described in the present invention, other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 This is a structural schematic diagram of a multi-station automatic low-pressure injection molding machine of the present invention;

[0048] Figure 2 It is a structural schematic diagram of the automatic positioning unit in the present invention;

[0049] Figure 3 It is a schematic cross-sectional structure diagram of the automatic positioning unit in the present invention;

[0050] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0051] Figure 5 It is a structural schematic diagram of the slide seat in the present invention;

[0052] Figure 6 It is a structural schematic diagram of the cleaning unit in the present invention;

[0053] Figure 7 It is a schematic diagram of the cross-sectional structure of the cleaning unit in the present invention.

[0054] In the figure: 1. turntable; 2. machine table; 3. upper mold assembly; 4. lower mold assembly; 10. bearing platform; 11. base; 12. first sleeve; 13. second sleeve; 14. transmission gear; 15. first motor; 16. gear ring; 17. first friction disk; 18. second motor; 19. second friction disk; 21. center axis; 22. sphere; 23. tray; 24. balance block; 25. rotating sleeve; 26. first balance bar; 27. support bar; 28. second balance bar; 29. ​​third motor; 31. slide rail; 32. slide seat; 33. upper limit slide column; 34. lower limit slide column; 35. detection cylinder; 36. fourth motor; 37. roller; 41. nozzle; 42. detection rod; 43. first bracket; 44. air flow channel; 45. air inlet; 46. air outlet; 47. guide ring; 48. second bracket. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0056] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0057] Embodiment 1:

[0058] like Figure 1 As shown, the present invention provides a multi-station automatic low-pressure injection molding machine, comprising:

[0059] A turntable 1 is rotatably disposed on a machine platform 2;

[0060] The mold closing and injection unit includes an upper mold assembly 3 and a lower mold assembly 4. The upper mold assembly 3 is connected to the hydraulic cylinder on the top of the machine table 2. The lower mold assembly 4 is provided in multiple numbers and evenly distributed on the turntable 1. The upper mold assembly 3 is connected to the injection molding pipe. Position sensors are provided on the upper mold assembly 3 and the lower mold assembly 4.

[0061] The automatic positioning unit is arranged in the machine table 2 and is used to adjust the position of the driving turntable 1 so that the upper mold assembly 3 and the lower mold assembly 4 are in corresponding positions.

[0062] Four injection molding stations are arranged on the turntable 1 , and each injection molding station is provided with a lower mold assembly 4 , and the upper mold assembly is located above any lower mold assembly 4 .

[0063] The working principle and beneficial effects of the above technical solution are:

[0064] The present invention provides a multi-station automatic low-pressure injection molding machine. When in use, four injection molding stations are arranged on a turntable 1, and a lower mold assembly 4 is arranged on each injection molding station. When performing injection molding, the turntable 1 is rotated, and any lower mold assembly 4 is rotated to the bottom of the upper mold assembly 3. The position sensor detects whether it is in place, and the hydraulic cylinder is started to push the upper mold assembly 3 downward. After the upper mold assembly 3 is molded with the lower mold assembly 4, an injection mold cavity is formed, and raw materials are injected into the injection mold cavity through an injection plastic pipe to form the molding. When the injection molding operation is performed at any one of the stations, the product that has been injection molded at another station can be taken out to achieve continuous operation. During the rotation of the turntable 1, the position sensors on the upper mold assembly 3 and the lower mold assembly 4 are used to determine whether the turntable 1 is rotated into place. When the in-place signal is not detected, that is, it is not rotated into place, the automatic positioning unit is started, and the position of the turntable 1 is adjusted until the in-place signal is detected.

[0065] Through the above structural design, a rotating turntable 1 is arranged on the injection molding machine, and a plurality of injection molding stations are arranged on the turntable 1. The injection molding production at each station is realized by combining the upper mold assembly 3 with the lower mold assembly 4 at different positions. A position sensor is used to detect the relative position of the mold, and based on this, the automatic positioning unit is started to adjust the angle of the turntable 1, thereby improving the accuracy of mold closing during multi-station operation and effectively ensuring the quality of the injection molded product.

[0066] Embodiment 2:

[0067] like Figure 2-4 As shown, based on the above embodiment 1, the automatic positioning unit includes a first angle adjustment unit, and the first angle adjustment unit includes:

[0068] A base 11, the base 11 is connected to the machine platform 2, and a rotating shaft is provided at the center of the base 11;

[0069] A first sleeve 12, the first sleeve 12 is rotatably connected to the top end of the rotating shaft of the base 11;

[0070] A second sleeve 13, the second sleeve 13 is concentrically connected to the first sleeve 13, and the bottom end of the second sleeve 12 is rotatably disposed on the top end of the base 11;

[0071] The bearing platform 10 is connected to the top of the first sleeve 12, and the bearing platform 10 is connected to the turntable 1;

[0072] A transmission gear 14, the transmission gear 14 is rotatably connected to the outer wall of the second sleeve 13;

[0073] A first motor 15, the first motor 15 is mounted on the inner wall of the second sleeve 13, and the output shaft is connected to the transmission gear 14;

[0074] The gear ring 16 is connected to the base 11 and is coaxially arranged outside the second sleeve 13 . The gear ring 16 is meshed and connected with the bottom end of the transmission gear 14 .

[0075] The working principle and beneficial effects of the above technical solution are:

[0076] When the first angle adjustment unit is used, the first motor 15 is started to drive the transmission gear 14 to rotate, and the transmission gear 14 is meshed with the gear ring 16 for transmission. Since the gear ring 16 is fixed in position, as the transmission gear 14 rotates, the second sleeve 13 is driven to rotate accordingly, and the first sleeve 12 rotates around the rotating shaft of the base 11, and the supporting platform 10 rotates accordingly. The supporting platform 10 is connected to the turntable 1, thereby realizing the adjustment of the angle of the turntable 1. The meshing transmission ratio of the transmission gear 14 and the gear ring 16 is accurate, and the rotation speed is fast, so the lower mold assembly 4 can be quickly positioned below the upper mold assembly 3, thereby improving the efficiency of station switching during injection molding operations.

[0077] Embodiment 3:

[0078] like Figure 2-4 As shown, based on the above embodiment 2, the automatic positioning unit includes a second angle adjustment unit, and the second angle adjustment unit includes:

[0079] A first friction disc 17, the first friction disc 17 is rotatably connected to one side of the top end of the bearing platform 10;

[0080] A second motor 18, the second motor 18 is installed at the bottom of the carrier 10, and the output shaft is connected to the first friction disc 17;

[0081] The second friction disc 19 is rotatably connected to the center of the top end of the support platform 10 and is concentrically arranged with the support platform 10 . The second friction disc 19 is in contact with and connected to the first friction disc 17 , and the top end of the second friction disc 19 is connected to the turntable 1 .

[0082] The working principle and beneficial effects of the above technical solution are:

[0083] When the second angle adjustment unit is used, the second motor 18 is started to drive the first friction disc 17 to rotate, and the friction surface of the first friction disc 17 contacts the friction surface of the second friction disc 19, and the second friction disc 19 is driven to rotate by the friction force, and the second friction disc 19 drives the turntable 1 to rotate. Through the above structural design, the secondary adjustment of the angle of the turntable 1 is effectively achieved. By rotating the friction disc, the angle of the second friction disc 19 can be infinitely adjusted, that is, a small angle adjustment is achieved, which is a supplement to the first angle adjustment unit, improves the precise adjustment of the angle of the turntable 1, and ensures the positioning accuracy.

[0084] Embodiment 4:

[0085] like Figure 2-4 As shown, based on the above embodiment 3, the automatic positioning unit further includes a balance adjustment unit, and the balance adjustment unit includes:

[0086] A central axis 21, the central axis 21 is connected to the top center of the carrier platform 10;

[0087] A sphere 22, the sphere 22 is connected to the top of the central shaft 21;

[0088] The tray 23 has a balancing block 24 at the bottom center of the tray 23, the balancing block 24 is rotatably connected with the ball 22 to form a ball pair, and the turntable 1 is connected to the top of the tray 23;

[0089] The rotating sleeve 25 is sleeved on the outside of the central shaft 21, and the bottom end of the rotating sleeve 25 is connected to the second friction disc 19;

[0090] A first balancing rod 26, wherein two first balancing rods 26 are symmetrically arranged on both sides of the rotating sleeve 25, and the center of the balancing rod 26 is rotatably connected to the rotating sleeve 26;

[0091] Support rods 27, two support rods 27 are provided and symmetrically connected to both sides of the bottom end of the tray 23;

[0092] A second balancing pole 28, the second balancing pole 28 is disposed between the ends of the two first balancing poles 26, and the two ends of the second balancing pole 28 are respectively hinged to the first balancing pole 26 and the support pole 27;

[0093] The third motor 29 is mounted on the second friction plate 19 , and the output shaft of the third motor 29 is centrally connected to one of the first balancing rods 26 .

[0094] The working principle and beneficial effects of the above technical solution are:

[0095] When multiple injection molding stations are arranged on the turntable 1, when one of the injection molding stations is closed, since a certain pressure needs to be maintained during the closing process, the turntable 1 is frequently subjected to eccentric pressure and is easily deformed, resulting in an imbalance of the turntable 1 and inability to accurately close the mold. Therefore, when the turntable 1 is unbalanced, the balance adjustment unit is activated, and the third motor 29 is started to drive the first balance bar 26 to rotate, and one end of the first balance bar 26 moves downward and the other end moves upward; the first balance bar 26 drives the support rod 27 to tilt through the second balance bar 28, that is, the support rod 27 on one side moves upward and the support rod 27 on the other side moves downward; the support rod 27 is installed on the tray 23, and the tray 23 forms a ball pair with the ball 22 through the balance block 24 at the bottom, so the support rod 27 drives the tray 23 to tilt, thereby compensating for the angle change of the turntable 1 and restoring it to a balanced state.

[0096] Through the above-mentioned structural design, the tray 23 adopts the connection form of a ball pair, which improves the flexibility of the angle adjustment of the turntable 1; the support rod 27 is used to provide support for the tray 23. The setting of the support rod 27 can release the freedom of the turntable 1 in its length direction, and limit the rotation direction of the turntable 1 to the rotation direction of the third motor 29. While ensuring the installation stability of the turntable 1, the balance of the turntable 1 is effectively adjusted; compared with the method of directly driving the turntable 1 with a rotating shaft, the turntable 1 can be adjusted and reset after being unbalanced, thereby preventing the deformation of the structural parts from causing the inability to accurately close the mold.

[0097] Embodiment 5:

[0098] like Figure 1 , 5 As shown, based on the above-mentioned embodiment 4, the automatic positioning unit further includes a balance detection unit, and the balance detection unit includes:

[0099] A slide rail 31, which is horizontally arranged on the upper part of the machine table 2 and located on one side of the upper mold assembly 3;

[0100] The slide 32 is slidably connected to the slide rail 31. Two upper limit slide posts 33 and a lower limit slide post 34 are respectively arranged on both sides of the slide 32. The track of the slide rail 31 is arranged between the upper limit slide post 33 and the lower limit slide post 34.

[0101] The detection tube 35 is connected to the bottom end of the slide seat 32 and is close to the surface of the turntable 1 .

[0102] The balance detection unit also includes: a fourth motor 36, a roller 37 and a plurality of guide wheels. The fourth motor 36 and the two rollers 37 are all installed on the base 11. The output end of the fourth motor 36 is connected to the two rollers 37 at the same time through a pulley assembly. A traction rope is wound around the two rollers 37, and the traction rope passes through the lower part of the base 11, is guided by the guide wheels, and is connected to the two ends of the slide 32.

[0103] The working principle and beneficial effects of the above technical solution are:

[0104] The balance detection unit is used to detect the balance state of the turntable 1. The driving part of the balance detection unit is integrated in the base 11, which is convenient for centralized control of the driving components. The fourth motor 36 is started. The fourth motor 36 drives the two rollers 37 to move synchronously through the belt transmission. The winding directions of the traction ropes on the two rollers 37 are opposite. When one roller 37 reels the line, the other roller 37 releases the line. The two rollers 37 are connected to the two ends of the slide 32 respectively, so the slide 32 is pulled to slide along the slide rail 31. The slide 32 drives the detection cylinder 35 to move, and the detection end of the detection cylinder 35 moves along the top of the turntable 1. During the injection molding operation, the height of each position of the turntable 1 is detected synchronously, so as to realize the detection of the imbalance degree of the turntable 1. The upper limit slide 33 and the lower limit slide 34 of the slide 32 slide relative to the slide rail 31, which helps to eliminate the gap between the upper and lower parts of the slide 32 and the slide rail 31, and improve the detection accuracy of the detection cylinder 35.

[0105] Embodiment 6:

[0106] like Figure 1 , 6 As shown in , 7, on the basis of the above-mentioned embodiment 5, the top end of the detection tube 35 is connected to the gas supply device, and the bottom end of the detection tube 35 is provided with a cleaning unit, and the cleaning unit includes:

[0107] A nozzle 41, the nozzle 41 is connected to the bottom end of the detection tube 35, and the nozzle 41 is arranged in a cone shape;

[0108] A detection rod 42, the top of which is connected to the inner wall of the nozzle 41 through a first bracket 43, an air flow channel 44 is provided at the center of the detection rod 42, an upwardly inclined air inlet 45 is provided at the top of the detection rod 42, and a downwardly inclined air outlet 46 is provided on the side of the detection rod 42, and both the air inlet 45 and the air outlet 46 are connected to the air flow channel 44; a detection head is provided at the bottom of the detection rod 42, and the detection head is electrically connected to the controller;

[0109] The guide ring 47 is connected to the detection rod 42 through the second bracket 48 . The edge of the guide ring 47 is set to be an arc shape, and the diameter of the guide ring 47 is smaller than the bottom diameter of the nozzle 41 .

[0110] The working principle and beneficial effects of the above technical solution are:

[0111] During the injection molding process, dust or excess waste during demoulding will accumulate on the surface of the turntable 1. A cleaning unit is provided in the detection tube 35. When in use, the air supply device conveys airflow into the detection tube 35, and the airflow is sprayed onto the surface of the turntable 1 through the nozzle 41. During the flow of the airflow, a part of the airflow at the edge of the nozzle 41 flows toward the center of the nozzle 41 under the guidance of the arc surface at the edge of the guide ring 47. A part of the airflow in the middle of the nozzle 41 flows directly toward the surface of the turntable 1 through the guide ring 47. A part of the airflow enters the airflow channel 44 of the detection rod 42 through the air inlet 45, and flows out through the air outlet 46 on the side of the detection rod 42. Since the air outlet 46 is arranged obliquely, an airflow surrounding the detection rod 42 is formed.

[0112] Through the above-mentioned structural design, the surface of the turntable 1 is effectively cleaned, and the influence of dust and waste on the detection results is eliminated; a guide ring 47 is arranged at the bottom of the nozzle 41 to concentrate the airflow at the center of the nozzle 41, thereby improving the blowing effect of the spraying airflow and reducing airflow loss; at the same time, the annular airflow formed on the surface of the detection rod 42 can remove the dust and waste attached thereto, so that the surface of the detection head remains clean and the accuracy of the detection is guaranteed.

[0113] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0114] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-station automatic low-pressure injection molding machine, characterized in that: include: A turntable (1), the turntable (1) is rotatably disposed on the machine platform (2); The mold closing injection unit comprises an upper mold assembly (3) and a lower mold assembly (4), the upper mold assembly (3) is connected to a hydraulic cylinder on the top of the machine platform (2), a plurality of lower mold assemblies (4) are arranged and evenly distributed on the turntable (1), the upper mold assembly (3) is connected to an injection molding pipe, and position sensors are arranged on the upper mold assembly (3) and the lower mold assembly (4); The automatic positioning unit is arranged in the machine platform (2) and is used to adjust the position of the driving turntable (1) so that the positions of the upper mold assembly (3) and the lower mold assembly (4) correspond.

2. A multi-station automatic low-pressure injection molding machine according to claim 1, characterized in that: Four injection molding stations are arranged on the turntable (1), and each injection molding station is provided with a lower mold assembly (4), and the upper mold assembly is located above any lower mold assembly (4).

3. A multi-station automatic low-pressure injection molding machine according to claim 2, characterized in that: The automatic positioning unit includes a first angle adjustment unit, and the first angle adjustment unit includes: A base (11), the base (11) is connected to the machine platform (2), and a rotating shaft is arranged at the center of the base (11); A first sleeve (12), the first sleeve (12) is rotatably connected to the top end of the rotating shaft of the base (11); A second sleeve (13), the second sleeve (13) is coaxially connected to the first sleeve (13), and the bottom end of the second sleeve (12) is rotatably disposed on the top end of the base (11); The bearing platform (10) is connected to the top of the first sleeve (12) and is connected to the turntable (1).

4. A multi-station automatic low-pressure injection molding machine according to claim 3, characterized in that: The first angle adjustment unit also includes: A transmission gear (14), the transmission gear (14) is rotatably connected to the outer wall of the second sleeve (13); A first motor (15), the first motor (15) is mounted on the inner wall of the second sleeve (13), and the output shaft of the first motor (15) is connected to the transmission gear (14); The gear ring (16) is connected to the base (11) and is coaxially arranged on the outside of the second sleeve (13). The gear ring (16) is meshedly connected with the bottom end of the transmission gear (14).

5. A multi-station automatic low-pressure injection molding machine according to claim 4, characterized in that: The automatic positioning unit includes a second angle adjustment unit, and the second angle adjustment unit includes: A first friction disc (17), the first friction disc (17) is rotatably connected to one side of the top end of the bearing platform (10); A second motor (18), the second motor (18) is mounted on the bottom of the bearing platform (10), and the output shaft is connected to the first friction disk (17); The second friction disc (19) is rotatably connected to the center of the top end of the bearing platform (10) and is arranged concentrically with the bearing platform (10). The second friction disc (19) is in contact with and connected to the first friction disc (17), and the top end of the second friction disc (19) is connected to the turntable (1).

6. A multi-station automatic low-pressure injection molding machine according to claim 5, characterized in that: The automatic positioning unit also includes a balance adjustment unit, which includes: A central axis (21), the central axis (21) is connected to the top center of the supporting platform (10); A sphere (22), the sphere (22) is connected to the top of the central shaft (21); A tray (23) is provided with a balancing block (24) at the center of the bottom end of the tray (23), the balancing block (24) is rotatably connected with the ball (22) to form a ball pair, and the turntable (1) is connected to the top end of the tray (23).

7. The multi-station automatic low-pressure injection molding machine according to claim 6, characterized in that: The balance adjustment unit includes: A rotating sleeve (25), the rotating sleeve (25) is sleeved on the outside of the central shaft (21), and the bottom end of the rotating sleeve (25) is connected to the second friction disc (19); A first balancing rod (26), wherein two first balancing rods (26) are symmetrically arranged on both sides of the rotating sleeve (25), and the center of the balancing rod (26) is rotatably connected to the rotating sleeve (26); Support rods (27), two support rods (27) are provided and symmetrically connected to two sides of the bottom end of the tray (23); The second balancing pole (28) is arranged between the ends of the two first balancing poles (26), and the two ends of the second balancing pole (28) are respectively hinged to the first balancing pole (26) and the support pole (27).

8. The multi-station automatic low-pressure injection molding machine according to claim 7, characterized in that: The balance adjustment unit also includes: a third motor (29), the third motor (29) is mounted on the second friction disk (19), and the output shaft of the third motor (29) is centrally connected to one of the first balance rods (26).

9. The multi-station automatic low-pressure injection molding machine according to claim 3, characterized in that: The automatic positioning unit also includes a balance detection unit, which includes: A slide rail (31), the slide rail (31) is horizontally arranged on the upper part of the machine platform (2) and is located on one side of the upper mold assembly (3); A slide seat (32), the slide seat (32) is slidably connected to the slide rail (31), two upper limit slide posts (33) and a lower limit slide post (34) are respectively arranged on both sides of the slide seat (32), and the track of the slide rail (31) is arranged between the upper limit slide post (33) and the lower limit slide post (34); The detection tube (35) is connected to the bottom end of the slide seat (32) and is close to the table surface of the turntable (1).

10. The multi-station automatic low-pressure injection molding machine according to claim 9, characterized in that: The balance detection unit also includes: a fourth motor (36), a roller (37) and a plurality of guide wheels. The fourth motor (36) and the two rollers (37) are both mounted on the base (11). The output end of the fourth motor (36) is simultaneously connected to the two rollers (37) through a pulley assembly. A traction rope is wound around the two rollers (37). The traction rope passes through the lower part of the base (11), is guided by the guide wheels, and is connected to the two ends of the slide seat (32).

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