Injection and whole-movement integrated oil cylinder for injection molding machine

Abstract

The invention discloses an injection and whole-movement integrated oil cylinder for an injection molding machine, which comprises a general outer cylinder barrel, a composite inner cylinder structure is integrated in the general outer cylinder barrel, and the composite inner cylinder structure comprises an injection piston rod and a whole-movement piston rod. One of the injection piston rod and the whole movement piston rod is arranged in an inner cylinder barrel structure and is externally provided with an outer cylinder piston, and the other one is arranged in the inner cylinder barrel structure and is provided with an inner cylinder piston. According to the injection and whole-moving integrated oil cylinder for the injection molding machine, the integrated design is adopted, connecting joints between parts are reduced, and therefore external oil leakage points are effectively avoided, the structure is simpler, the overall size is small, the number of the parts is small, assembling is convenient, precision is high, cost is low, the injection function and the whole-moving function are integrated, and the concentricity and assembling precision of the oil cylinder can be effectively improved; the overall performance of the injection molding machine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, in particular to an injection-movement integrated oil cylinder for an injection molding machine. Background Art

[0002] In the existing injection components of injection molding machines, the injection cylinder and the whole-shift cylinder are two separate components. During use, the injection cylinder realizes the injection function, while the whole-shift cylinder realizes the overall movement function of the injection molding machine. The injection cylinder and the whole-shift cylinder are operated separately, resulting in multiple connection points in the same injection component. When the injection cylinder and the whole-shift cylinder are assembled separately, the risk of oil leakage will increase, and the volume of the assembly will be enlarged, the assembly accuracy will be reduced, and the overall performance of the injection molding machine will be reduced.

[0003] In view of the shortcomings of the separate settings of the injection cylinder and the whole-shift cylinder in the above-mentioned injection components, it is necessary to design an injection and whole-shift integrated cylinder for injection molding machines that can meet the injection and whole-shift functions while reducing the volume, improving the assembly accuracy and the overall performance of the injection molding machine. Summary of the invention

[0004] The purpose of the present invention is to solve the problems that the injection cylinder and the whole-shift cylinder of the existing injection molding machine are operated separately by different cylinders, resulting in large assembly volume, low assembly precision, and low overall performance of the injection molding machine. By providing an injection and whole-shift integrated cylinder for an injection molding machine, the invention can meet multiple functions of injection and whole-shift, has a small volume, and can improve assembly precision and the overall performance of the injection molding machine.

[0005] The technical solution adopted by the present invention to achieve its inventive purpose is: an injection-shifting integrated oil cylinder for an injection molding machine, including a universal outer cylinder barrel, a composite inner cylinder structure integrated inside the universal outer cylinder barrel, the composite inner cylinder structure including an injection piston rod and a shifting piston rod, one of the injection piston rod and the shifting piston rod is arranged in an inner cylinder barrel structure and is provided with an outer cylinder piston on the outside, and the other is arranged inside the inner cylinder barrel structure and is provided with an inner cylinder piston. The injection molding machine uses an integrated injection and whole-shift cylinder. Through a new design of the cylinder structure, the injection cylinder and the whole-shift cylinder are integrated into one, a universal outer cylinder is provided, and a composite inner cylinder structure is integrated inside the universal outer cylinder. The composite inner cylinder structure mainly realizes two piston structures that are nested inside and outside through an injection piston rod and a whole-shift piston rod that can be nested with each other. Specifically, one of the injection piston rod or the whole-shift piston rod is provided with an inner cylinder structure, and the piston rod set as the inner cylinder structure is provided with an outer cylinder piston that cooperates with the universal outer cylinder to form an external cylinder structure and serves as the inner cylinder of the internal cylinder structure at the same time. The other piston rod serves as the piston rod of the internal cylinder structure and cooperates with the inner cylinder piston to form an internal cylinder structure. The external cylinder structure can function as an injection cylinder or a whole-shift cylinder, and the internal cylinder structure can function as a whole-shift cylinder or an injection cylinder. The injection-shifting integrated oil cylinder used in the injection molding machine has a small overall volume, a simple structure, a few parts, convenient assembly and high precision. It integrates the injection and shifting functions into one, which can effectively improve the assembly precision and the overall performance of the injection molding machine.

[0006] Preferably, the outer cylinder piston cavity is provided inside the universal outer cylinder barrel, and the outer cylinder piston is slidably sealed with the outer cylinder piston cavity. An outer cylinder piston cavity is provided inside the universal outer cylinder barrel, and the outer cylinder piston is slidably sealed with the outer cylinder piston cavity, thereby forming an external injection cylinder or an external full displacement cylinder.

[0007] Preferably, the inner cylinder structure is provided with an inner cylinder piston cavity, and the inner cylinder piston is slidably sealed with the inner cylinder piston cavity. The inner cylinder structure is provided with an inner cylinder piston cavity, and the inner cylinder piston is slidably sealed with the inner cylinder piston cavity to form an internal integral oil cylinder or an internal injection oil cylinder.

[0008] Preferably, the injection piston rod and the whole-shift piston rod are coaxially arranged in opposite directions and extend to both ends of the universal outer cylinder respectively; the amount of extension of the injection piston rod and the whole-shift piston rod when they are withdrawn to the two end surfaces of the universal outer cylinder is greater than zero. In order to realize the miniaturization and multifunctional design of the integrated oil cylinder, the piston rod and the whole-shift piston rod are coaxially arranged in opposite directions. When in use, one end of the universal outer cylinder is connected to the injection unit to realize the injection function, and the other end of the universal outer cylinder is connected to the whole-shift unit to realize the whole-shift function. The amount of extension of the injection piston rod and the whole-shift piston rod when they are withdrawn to the two end surfaces of the universal outer cylinder is greater than zero in order to ensure the connection between the piston rod and the injection unit or the whole-shift unit components.

[0009] Preferably, the universal outer cylinder comprises an outer cylinder body, an outer cylinder opening and an outer cylinder bottom, and a central device of the outer cylinder bottom is provided with an outer cylinder center hole. The above structure of the universal outer cylinder is to realize an integrated multi-purpose oil cylinder, facilitate the setting of the composite inner cylinder structure, and facilitate the integration of different functions of the oil cylinder into a small volume.

[0010] Preferably, an outer cylinder end cap is sealed and connected to the outer cylinder opening, and a first composite inner cylinder structure sliding hole is provided at the center of the outer cylinder end cap. The first composite inner cylinder structure sliding hole is provided to facilitate the sliding of the injection piston rod or the whole-shift piston rod, thereby realizing the injection or whole-shift operation.

[0011] Preferably, an outer cylinder bottom end cover is sealed and connected to the center hole of the outer cylinder, and a second composite inner cylinder structure sliding hole is provided at the center of the outer cylinder bottom end cover. The second composite inner cylinder structure sliding hole is provided to facilitate the sliding of the whole-movement piston rod or the injection piston rod, thereby realizing the whole-movement or injection operation.

[0012] Preferably, at least one outer cylinder oil port is provided on the universal outer cylinder. The outer cylinder oil port is provided on the universal outer cylinder for the purpose of facilitating the pushing function of the injection or full-shift piston to realize the injection or full-shift operation, and for facilitating the movement and adjustment of the position required for injection or full-shift according to the adjustment of the oil volume.

[0013] Preferably, at least one inner cylinder oil port is provided on the inner cylinder structure. The inner cylinder oil port is provided on the inner cylinder structure to facilitate the pushing function of the whole shift or injection piston to realize the whole shift or injection operation, and to facilitate the movement and adjustment of the position required for the whole shift or injection according to the adjustment of the oil volume.

[0014] Preferably, the outer cylinder piston is provided with a composite sealing structure; the inner cylinder piston is provided with a multiple sealing structure. The composite sealing structure and the multiple sealing structure are provided to achieve a good sealing effect, prevent pressure relief and oil leakage, ensure the accuracy of the integrated oil cylinder, and thus improve the overall performance of the whole machine.

[0015] The beneficial effects of the invention are: the injection molding machine uses an integrated injection and whole-shift oil cylinder with an integrated design, which reduces the connection nodes between components, thereby effectively avoiding external oil leakage points, making the structure simpler, the overall volume small, the number of components is small, the assembly is convenient, the precision is high, and the cost is low. The injection and whole-shift functions are integrated into one, which can effectively improve the concentricity and assembly precision of the cylinder and enhance the overall performance of the injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an injection-movement integrated oil cylinder for an injection molding machine of the present invention; Figure 2 This is a structural schematic diagram of an injection-movement integrated oil cylinder for an injection molding machine in Embodiment 2 of the present invention; Figure 3 This is a front view of an injection-movement integrated oil cylinder for an injection molding machine in Embodiment 2 of the present invention; Figure 4 yes Figure 3 Middle AA section view; Figure 5 This is a schematic diagram of an exploded structure of an injection-movement integrated oil cylinder for an injection molding machine in Embodiment 2 of the present invention; Figure 6 This is a structural schematic diagram of an injection-movement integrated oil cylinder for an injection molding machine in Embodiment 3 of the present invention; In the figure: 1, universal outer cylinder, 10, outer cylinder piston chamber, 11, outer cylinder body, 12, outer cylinder opening, 13, outer cylinder bottom, 14, outer cylinder center hole, 15, outer cylinder oil port, 16, outer cylinder end cover, 17, first composite inner cylinder structure sliding hole, 18, outer cylinder bottom end cover, 19, second composite inner cylinder structure sliding hole; 2. Composite inner cylinder structure, 20. Inner cylinder piston chamber, 21. Injection piston rod, 22. Full-shift piston rod, 23. Outer cylinder piston, 24. Inner cylinder piston, 25. Inner cylinder oil port, 26. Composite sealing structure, 27. Multiple sealing structure; 3. Injection cylinder assembly, 30. Injection piston chamber, 301. First piston chamber, 302. Second piston chamber, 31. Injection cylinder, 32. Injection cylinder end cover, 33. Injection cylinder bottom, 34. Injection cylinder opening, 35. Injection cylinder end cover mounting hole, 36. Injection piston rod penetration hole, 37. First injection oil port, 38. Second injection oil port, 39. Multi-channel cylinder end cover sealing structure, 4. Injection piston assembly, 40. Full-shift piston chamber, 401. Rod piston chamber, 402. Rodless piston chamber, 41. injection piston rod, 42. injection piston, 43. composite sealing assembly, 44. injection piston fixing seat; 5. whole-shift cylinder assembly, 51. whole-shift piston rod movable hole, 52. whole-shift piston rod end cover, 53. whole-shift end cover, 54. whole-shift piston rod extension hole, 55. multi-channel end cover seal, 56. labyrinth seal structure; 6. Full-shift piston assembly, 61. Full-shift piston rod, 62. Full-shift piston, 63. Injection piston rod oil inlet hole, 64. Multiple sealing dustproof parts; 7. Shift cylinder barrel, 71. Shift cylinder barrel bottom, 72. Shift cylinder barrel opening, 73. Shift rod piston movable hole, 74. Injection piston rod movable hole, 75. Multiple sealing structure, 76. Shift piston rod oil inlet hole, 77. Shift cylinder end cover mounting hole. DETAILED DESCRIPTION

[0017] The various aspects of the present invention are described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0018] Embodiment 1: exist Figure 1 In the embodiment shown, an injection-switching integrated oil cylinder for an injection molding machine includes a universal outer cylinder 1, an outer cylinder piston chamber 10 is provided inside the universal outer cylinder 1, a composite inner cylinder structure 2 is integrated inside the universal outer cylinder 1, and the composite inner cylinder structure 2 includes an injection piston rod 21 and a shifting piston rod 22, one of the injection piston rod 21 and the shifting piston rod 22 is provided in an inner cylinder structure and an outer cylinder piston 23 is provided outside, and the other is provided inside the inner cylinder structure and an inner cylinder piston 24 is provided. The outer cylinder piston 23 is in sliding sealing cooperation with the outer cylinder piston chamber. The inner cylinder piston chamber 20 is provided inside the inner cylinder structure, and the inner cylinder piston 24 is in sliding sealing cooperation with the inner cylinder piston chamber 20.

[0019] The composite inner cylinder structure 2 mainly includes an injection piston rod 21 and an integral piston rod 22 which can be nested with each other, thereby realizing two piston structures which are nested inside and outside. The injection piston rod 21 can be set as an inner cylinder structure, or the integral piston rod 22 can be set as an inner cylinder structure. An outer cylinder piston 23 is arranged on the piston rod set as the inner cylinder structure. The outer cylinder piston 23 cooperates with the universal outer cylinder 1 to form an external oil cylinder structure. At the same time, the piston rod adjusted back to the inner cylinder structure serves as the inner cylinder of the internal oil cylinder structure, and the other piston rod serves as the piston rod of the internal oil cylinder structure, cooperating with the inner cylinder piston to form the internal oil cylinder structure.

[0020] The external cylinder structure can function as an injection cylinder or a moving cylinder, and the internal cylinder structure can function as a moving cylinder or an injection cylinder.

[0021] The injection piston rod 21 and the full displacement piston rod 22 are coaxially arranged in opposite directions and extend to both ends of the universal outer cylinder 1 respectively; the extension amount of the injection piston rod 21 and the full displacement piston rod 22 when they are ejected to the two end surfaces of the universal outer cylinder 1 is greater than zero.

[0022] The universal outer cylinder 1 comprises an outer cylinder body 11 , an outer cylinder opening 12 and an outer cylinder bottom 13 , and an outer cylinder center hole 14 is opened in the center of the outer cylinder bottom 13 .

[0023] An outer cylinder end cover 16 is sealed and connected to the outer cylinder opening 12, and a first composite inner cylinder structure sliding hole 17 is arranged at the center of the outer cylinder end cover 16. An outer cylinder bottom end cover 18 is sealed and connected to the outer cylinder center hole 14, and a second composite inner cylinder structure sliding hole 19 is arranged at the center of the outer cylinder bottom end cover 18.

[0024] At least one outer cylinder oil port 15 is provided on the universal outer cylinder 1. The outer cylinder oil port is provided on the universal outer cylinder for the convenience of realizing the pushing function of the injection or full-shift piston to realize the injection or full-shift operation, and for the convenience of moving and adjusting the position required for injection or full-shift according to the adjustment of the oil volume. When one outer cylinder oil port is provided, the oil inlet and oil suction operations can be realized through an external control valve. When two outer cylinder oil ports are provided, one is the oil inlet and the other is the oil outlet. In addition, in order to realize the regulation of oil pressure, a pressure regulating oil port can also be provided on the universal outer cylinder. The pressure regulating oil port and the outer cylinder oil port are different oil ports, which are used to adjust or increase the pressure inside the oil chamber.

[0025] At least one inner cylinder oil port 25 is provided on the inner cylinder structure. The inner cylinder oil port is provided on the inner cylinder structure for the purpose of, firstly, facilitating the pushing function of the whole shift or injection piston to realize the whole shift or injection operation, and secondly, facilitating the movement and adjustment of the position required for the whole shift or injection according to the adjustment of the oil volume. When one inner cylinder oil port is provided, the oil inlet and oil suction operations can be realized through an external control valve. When two inner cylinder oil ports are provided, one is the oil inlet and the other is the oil outlet. In addition, in order to realize the regulation of the oil pressure, a pressure regulating oil port can also be provided on the inner cylinder structure. The pressure regulating oil port and the inner cylinder oil port are different oil ports, which are used to adjust or increase the pressure inside the oil chamber.

[0026] The outer cylinder piston 23 is provided with a composite sealing structure 26, and the inner cylinder piston 24 is provided with a multiple sealing structure 27. The composite sealing structure and the multiple sealing structure are provided to achieve a good sealing effect, prevent pressure relief and oil leakage, ensure the accuracy of the integrated oil cylinder, and thus improve the overall performance of the whole machine.

[0027] Embodiment 2: In Figure 2, Figure 3 , Figure 4 , Figure 5 In the illustrated embodiment, an integrated injection and movement cylinder for an injection molding machine includes an injection cylinder assembly and a movement cylinder assembly nested together.

[0028] In this embodiment, the whole-moving cylinder assembly is embedded in the injection cylinder assembly, thereby forming an integrated oil cylinder with an external injection cylinder assembly and an internal integrated whole-moving cylinder assembly.

[0029] The injection piston rod in the external injection cylinder assembly is configured as a function-integrated structure, that is, the injection piston rod realizes the function of the injection cylinder piston rod and the function of the whole-shift cylinder barrel. The whole-shift piston assembly in the whole-shift cylinder assembly is integrated inside the injection piston rod.

[0030] The injection piston rod 21 and the full-shift piston rod 22 in the integrated oil cylinder are arranged in opposite directions, that is, the injection piston rod 21 and the full-shift piston rod 22 are arranged along the same axis toward two directions.

[0031] In this embodiment, the injection piston rod 21 is arranged toward the left side, and the full-shift piston rod 22 is arranged toward the right side.

[0032] The external injection cylinder assembly includes an injection cylinder assembly 3 and an injection piston assembly 4 arranged inside the injection cylinder assembly 3. The injection cylinder assembly 3 includes an injection cylinder 31 and an injection cylinder end cover 32. The injection cylinder 31 is set as a universal outer cylinder 1, and the injection cylinder end cover 32 is an outer cylinder end cover 16. The injection cylinder 31 is provided with an injection piston cavity 30 inside, and the injection piston cavity 30 is set as an outer cylinder piston cavity 10. The injection piston assembly 4 is slidingly sealed inside the injection piston cavity 30. An injection cylinder bottom 33 is provided at one end of the injection cylinder 31, and the injection cylinder bottom 33 is the outer cylinder bottom 13. An injection cylinder opening 34 is provided at the other end of the injection cylinder 31, and the injection cylinder opening 34 is the outer cylinder opening 12. The injection cylinder end cover 32 sealing cover is arranged on the injection cylinder opening 34. An injection cylinder end cover mounting hole 35 is opened at the center position of the injection cylinder bottom 33, and the injection cylinder end cover mounting hole 35 is the outer cylinder center hole 14. The injection cylinder end cover 32 is provided with an injection piston rod through hole 36 at its center, and the injection piston rod through hole 36 is the first composite inner cylinder structure sliding hole 17. Multiple cylinder end cover sealing structures 39 are provided on the hole wall of the injection piston rod through hole 36.

[0033] The cylinder body of the injection cylinder 31 is provided with a first injection oil port 37 and a second injection oil port 38. The first injection oil port 37 and the second injection oil port 38 are the outer cylinder oil ports 15.

[0034] The injection piston assembly 4 includes an injection piston rod 21 and an injection piston 42. The injection piston 42 is the outer cylinder piston 23. The injection piston rod 21 is provided with a full-shift piston chamber 40. The full-shift piston chamber 40 is the inner cylinder piston chamber 20. The internal full-shift assembly 2 is arranged inside the full-shift piston chamber 40. The injection piston 42 is provided with a composite sealing assembly 43. The composite sealing assembly 43 is the composite sealing structure 26. The composite sealing assembly 43 includes an O-type sealing ring, a U-type sealing ring, a Gly ring, a sealing ring, a wear-resistant ring and a dustproof ring. Multiple sealing is achieved through the composite sealing assembly, thereby achieving a good sealing effect and preventing the occurrence of pressure relief and oil leakage.

[0035] One end of the injection piston rod 21 is arranged inside the injection piston cavity 30, and the other end passes through the injection piston rod through hole 36 on the injection cylinder end cover 32 and extends outside the injection cylinder 31. An injection piston fixing seat 44 is arranged on the injection piston rod 21 located inside the injection piston cavity 30, and the injection piston 42 is connected to the injection piston fixing seat 44 and is slidably sealed with the injection piston cavity 30. In this embodiment, the injection piston 42 is fixed to the injection piston fixing seat 44 by a locking bolt.

[0036] The injection piston 42 divides the injection piston chamber 30 into two first piston chambers 301 and second piston chambers 302. The first injection oil port 37 and the second injection oil port 38 are respectively arranged on the walls of the injection cylinder 31 corresponding to the first piston chamber 301 and the second piston chamber 302 and respectively connect the first piston chamber 301 and the second piston chamber 302.

[0037] The first injection oil port 37 and the second injection oil port 38 are provided to facilitate the adjustment of the injection position, specifically to move the position required for injection according to the adjustment of the oil amount.

[0038] The whole-movement cylinder assembly includes a whole-movement cylinder assembly 5 and a whole-movement piston assembly 6. The whole-movement cylinder assembly 5 includes a whole-movement cylinder 7 formed by the injection piston rod 21, a whole-movement piston rod end cap 52 and a whole-movement end cap 53 arranged at the extended end of the injection piston rod. The whole-movement end cap 53 is the outer cylinder bottom end cap 18. The whole-movement end cap 53 is sealed and connected inside the injection cylinder end cap mounting hole 35 of the injection cylinder bottom 33. A plurality of end cap seals 55 are arranged on the outer wall of the whole-movement end cap 53.

[0039] The injection piston rod 21 is provided with a movable hole 51 for the whole-movement piston rod connected to the whole-movement piston chamber 40 . The movable hole 51 for the whole-movement piston rod is provided at one end of the injection piston rod 21 provided inside the injection piston chamber 30 and passes through the end.

[0040] The center of the full-shift end cover 53 is provided with a full-shift piston rod extension hole 54. The full-shift piston rod extension hole 54 is the second composite inner cylinder structure sliding hole 19, and a labyrinth seal structure 56 is provided on the inner wall of the full-shift piston rod extension hole 54.

[0041] The full-shift piston assembly 6 includes a full-shift piston rod 22 and a full-shift piston 62. The full-shift piston 62 is the inner cylinder piston 24. The full-shift piston rod 22 is arranged inside the full-shift piston cavity 40, and one end of the full-shift piston rod 22 extends outside the injection piston rod 21 and the injection cylinder 31. Specifically, the full-shift piston rod 22 extends outside through the full-shift piston rod active hole 51 on the injection piston rod 21 and the full-shift piston rod extension hole 54 on the full-shift end cover 53. When the full-shift piston is ejected and retreated to the end surface of the injection cylinder end cover 32, the extension amount of the full-shift piston rod at the end surface of the full-shift end cover 53 is greater than zero.

[0042] The full-shift piston 62 is arranged on the full-shift piston rod 22 and is slidingly and sealingly connected to the full-shift piston chamber 40. The full-shift piston 62 divides the full-shift piston chamber 40 into a rod piston chamber 401 and a rodless piston chamber 402. An injection piston rod oil inlet hole 63 is opened on the cavity wall of the rodless piston chamber 402.

[0043] The full-shift piston 62 is provided with a multiple sealing dustproof member 64, which is a multiple sealing structure 27. The multiple sealing dustproof member 64 includes an O-shaped sealing ring, a U-shaped sealing ring, a Gly ring, a sealing ring, a wear-resistant ring and a dustproof ring. Multiple sealing is achieved through the multiple sealing dustproof member, achieving a good sealing effect and preventing the occurrence of pressure relief and oil leakage.

[0044] Embodiment 3: exist Figure 6 In the embodiment shown, an injection-movement integrated oil cylinder for an injection molding machine includes an injection cylinder assembly and an entire movement cylinder assembly nested together. The injection cylinder assembly is embedded inside the entire movement cylinder barrel assembly, thereby forming an integrated oil cylinder with an external entire movement cylinder barrel assembly and an internal integrated injection cylinder assembly.

[0045] The external full-shift cylinder assembly comprises a full-shift cylinder assembly 5 and a full-shift piston assembly 6 arranged inside the full-shift cylinder assembly 5 .

[0046] The full-shift cylinder assembly 5 includes a full-shift cylinder 7, a full-shift cylinder end cover 52 and a full-shift end cover 53. The full-shift cylinder 7 is the universal outer cylinder 1, the full-shift cylinder end cover 52 is the outer cylinder end cover 16, the full-shift end cover 53 is the outer cylinder bottom end cover 18, and the interior of the full-shift cylinder 7 is provided with a full-shift piston chamber 40, the full-shift piston chamber 40 is the outer cylinder piston chamber 10, and the full-shift piston assembly 6 sliding seal is arranged inside the full-shift piston chamber 40.

[0047] One end of the whole-shift cylinder 7 is provided with a whole-shift cylinder bottom 71, and the other end of the whole-shift cylinder 7 is provided with a whole-shift cylinder opening 72. The sealing cover of the whole-shift cylinder end cover 52 is provided on the whole-shift cylinder opening 72. A whole-shift cylinder end cover mounting hole 77 is provided at the center of the whole-shift cylinder bottom 71. The whole-shift cylinder end cover mounting hole 77 is the center hole 14 of the outer cylinder. The whole-shift end cover 53 is sealed and connected in the whole-shift cylinder end cover mounting hole 77. The whole-shift end cover 53 is provided with a whole-shift rod piston movable hole 73. The whole-shift rod piston movable hole 73 is the second composite inner cylinder structure sliding hole 19. The injection piston rod movable hole 74 is provided at the center of the whole-shift cylinder end cover 52, which is the first composite inner cylinder structure sliding hole 17. Multiple sealing structures 75 are provided on the hole wall of the injection piston rod movable hole 74.

[0048] The cylinder body of the full-shift cylinder 7 is provided with a full-shift piston rod oil inlet hole 76. The full-shift piston rod oil inlet hole 76 is the outer cylinder oil port 15.

[0049] The full-shift piston assembly 6 includes a full-shift piston rod 22 and a full-shift piston 62, wherein the full-shift piston 62 is the outer cylinder piston 23, and an injection piston chamber 30 is arranged inside the full-shift piston rod 22, and the injection piston chamber 30 is the inner cylinder piston chamber 20, and the internal injection cylinder assembly is arranged inside the injection piston chamber 30.

[0050] The full-shift piston 62 is provided with a multiple sealing dustproof part 64, and the multiple sealing dustproof part 64 is a composite sealing structure 26. The multiple sealing dustproof part 64 includes an O-ring, a U-ring, a Gly ring, a sealing ring, a wear-resistant ring and a dust ring. Multiple sealing is achieved through the composite sealing component, thereby achieving a good sealing effect and preventing the occurrence of pressure relief and oil leakage.

[0051] One end of the full-shift piston rod 22 is disposed inside the full-shift piston chamber 40 , and the other end passes through the full-shift rod piston movable hole 73 on the full-shift cylinder 7 and extends to the outside of the full-shift cylinder 7 .

[0052] The full-shift piston 62 divides the full-shift piston chamber 40 into a rod piston chamber 401 and a rodless piston chamber 402. The wall of the rodless piston chamber 402 is provided with a full-shift piston rod oil inlet hole 76.

[0053] The injection cylinder assembly includes an injection cylinder assembly 3 and an injection piston assembly 4. The injection cylinder assembly 3 includes an injection cylinder 31 formed by the full-movement piston rod 22 and an injection piston rod end cap 32 arranged at the end of the full-movement piston rod. The injection piston rod end cap 32 is sealed and connected to the full-movement piston rod 22. Multiple cylinder end cap sealing structures 39 are respectively arranged on the inner wall and the outer wall of the injection piston rod end cap 32.

[0054] An injection piston chamber 30 is disposed inside the full-shift piston rod 22 .

[0055] The injection piston assembly 4 includes an injection piston rod 21 and an injection piston 42 , wherein the injection piston 42 is an inner cylinder piston 24 , the injection piston rod 21 is arranged inside the injection piston cavity 30 , and one end of the injection piston rod 21 extends out of the injection piston cavity 30 and the full-shift piston cavity 40 .

[0056] The full-shift piston rod 41 is provided with a first injection oil port 37 and a second injection oil port 38 . The first injection oil port 37 and the second injection oil port 38 are the inner cylinder oil ports 25 .

[0057] The injection piston 42 is arranged on the injection piston rod 21 and is slidingly and sealingly connected to the injection piston chamber 30. The injection piston 42 divides the injection piston chamber 30 into a first piston chamber 301 and a second piston chamber 302. The first injection oil port 37 and the second injection oil port 38 are respectively arranged on the full-shift piston rod 22 corresponding to the first piston chamber 301 and the second piston chamber 302 and are respectively connected to the first piston chamber 301 and the second piston chamber 302.

[0058] The first injection oil port 37 and the second injection oil port 38 are provided to facilitate the adjustment of the injection position, specifically to move the position required for injection according to the adjustment of the oil amount.

[0059] The injection piston 42 is provided with a composite sealing assembly 43, which is a multiple sealing structure 27. The composite sealing assembly 43 includes an O-shaped sealing ring, a U-shaped sealing ring, a Gly ring, a sealing ring, a wear-resistant ring and a dust ring, and multiple sealing is achieved through the composite sealing assembly, thereby achieving a good sealing effect and preventing the occurrence of pressure relief and oil leakage.

[0060] In the above embodiment, the injection molding machine uses an integrated injection and movement cylinder, in which the entire movement cylinder is contained inside the injection piston rod or the injection piston is embedded inside the entire movement piston rod. This embedded structure design enables the cylinder to have an integrated structure for injection and movement, which saves space and realizes a multifunctional one-cylinder structure.

[0061] The injection piston rod and the full-shift piston rod in the integrated oil cylinder are arranged in opposite directions, that is, the injection piston rod and the full-shift piston rod are arranged along the same axis toward two directions.

[0062] By integrating a composite inner cylinder structure inside a universal outer cylinder, two piston structures that are nested inside and outside are realized, and one of the injection piston rod or the whole-shift piston rod is set as an inner cylinder tube structure. The piston rod set as the inner cylinder tube structure is provided with an outer cylinder piston that cooperates with the universal outer cylinder tube to form an external cylinder structure, and at the same time serves as the inner cylinder tube of the internal cylinder structure. The other piston rod serves as the piston rod of the internal cylinder structure, and cooperates with the inner cylinder piston to form an internal cylinder structure. The external cylinder structure can function as an injection cylinder or a whole-shift cylinder, and the internal cylinder structure can function as a whole-shift cylinder or an injection cylinder.

[0063] The injection molding machine uses an integrated injection and translation cylinder, which integrates the injection cylinder and the translation cylinder into one, reducing the connection nodes between the components, thereby better avoiding external oil leakage points, making the structure simpler and reducing the structural cost, and more accurate for the concentricity and assembly accuracy of the cylinder.

[0064] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there may be multiple variations, such as changing the installation position of the oil cylinder and the motor, changing the motion form of the injection mold, etc. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention.

Claims

1. An injection and movement integrated oil cylinder for an injection molding machine, characterized in that: The invention comprises a universal outer cylinder (1), wherein a composite inner cylinder structure (2) is integrated inside the universal outer cylinder (1), wherein the composite inner cylinder structure (2) comprises an injection piston rod (21) and a full-shift piston rod (22), wherein one of the injection piston rod (21) and the full-shift piston rod (22) is arranged in an inner cylinder structure and has an outer cylinder piston (23) arranged outside, and the other is arranged inside the inner cylinder structure and has an inner cylinder piston (24).

2. The injection-movement integrated oil cylinder for an injection molding machine according to claim 1, characterized in that: An outer cylinder piston chamber (10) is provided inside the universal outer cylinder barrel (1), and the outer cylinder piston (23) is in sliding sealing cooperation with the outer cylinder piston chamber (10).

3. The injection-movement integrated oil cylinder for an injection molding machine according to claim 1, characterized in that: An inner cylinder piston chamber (20) is provided inside the inner cylinder barrel structure, and the inner cylinder piston (24) is in sliding sealing cooperation with the inner cylinder piston chamber (20).

4. The injection-movement integrated oil cylinder for an injection molding machine according to claim 1, characterized in that: The injection piston rod (21) and the full displacement piston rod (22) are coaxially arranged in opposite directions and extend to both ends of the universal outer cylinder (1) respectively; the extension amount of the injection piston rod (21) and the full displacement piston rod (22) when they are ejected back to the two end surfaces of the universal outer cylinder (1) is greater than zero.

5. The injection-movement integrated oil cylinder for an injection molding machine according to any one of claims 1 to 4, characterized in that: The universal outer cylinder (1) comprises an outer cylinder body (11), an outer cylinder opening (12) and an outer cylinder bottom (13), and an outer cylinder center hole (14) is provided in the center device of the outer cylinder bottom (13).

6. The injection and movement integrated oil cylinder for an injection molding machine according to claim 5, characterized in that: An outer cylinder end cover (16) is sealedly connected to the outer cylinder opening (12), and a first composite inner cylinder structure sliding hole (17) is provided at the center of the outer cylinder end cover (16).

7. The injection-movement integrated oil cylinder for an injection molding machine according to claim 5, characterized in that: An outer cylinder bottom end cover (18) is sealingly connected to the outer cylinder center hole (14), and a second composite inner cylinder structure sliding hole (19) is provided at the center position of the outer cylinder bottom end cover (18).

8. The injection-movement integrated oil cylinder for an injection molding machine according to any one of claims 1 to 4, characterized in that: At least one outer cylinder oil port (15) is provided on the universal outer cylinder barrel (1).

9. The injection-movement integrated oil cylinder for an injection molding machine according to any one of claims 1 to 4, characterized in that: At least one inner cylinder oil port (25) is provided on the inner cylinder structure.

10. The injection-movement integrated oil cylinder for an injection molding machine according to any one of claims 1 to 4, characterized in that: The outer cylinder piston (23) is provided with a composite sealing structure (26); and the inner cylinder piston (24) is provided with a multiple sealing structure (27).

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