Hydraulic system of rotatable equipment and injection molding system

Abstract

The invention discloses a hydraulic system of rotatable equipment and an injection molding system, the hydraulic system comprises a fixing assembly, a swivel joint assembly, an external oil way assembly and a rotating shaft, and the swivel joint assembly is arranged on the fixing assembly; the external oil way assembly is connected to the swivel joint assembly; the rotating shaft can rotate synchronously with the rotating equipment, an internal oil way connected with a mold driving component of the rotating equipment and the rotating connector assembly is arranged in the rotating shaft, the external oil way assembly is connected to the rotating connector assembly, and the internal oil way in the rotating shaft can rotate synchronously along with the rotating shaft and the rotating equipment through the rotating connector assembly. The oil seal component of the swivel joint assembly is not arranged on the rotating equipment, the oil seal component is not easily influenced by the rotating equipment, the oil seal component can keep a good oil sealing effect, the oil way is less influenced by the temperature of the mold, the occurrence of oil leakage is reduced, and the service life of the swivel joint assembly is prolonged. And the hydraulic system has high stability and reliability.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a hydraulic system and an injection system of a rotatable device. Background Art

[0002] For molds that produce multiple materials and have multiple working positions, it is usually necessary to configure special rotating equipment to set up multiple sets of molds, and realize the switching of multiple working positions by rotating to different positions. The driving mechanism of the mold, such as the ejector cylinder, neutron cylinder, etc., is configured in the rotating equipment.

[0003] Since the hydraulic oil will be affected by the temperature of the rotating equipment and the mold, the temperature of the hydraulic oil will rise, affecting the effect of the sealing oil system of the seal, and oil leakage is likely to occur. Therefore, it is difficult to build a high-pressure oil circuit in such rotating equipment. At present, in such rotating equipment, only gas ejection can be used. However, the pressure of gas ejection is usually only 5kgf, while the hydraulic system of the equipment can reach 140kgf, and the ejection speed cannot be controlled. Therefore, the effect of using air pressure drive is not ideal. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a hydraulic system for a rotatable device, which can be applied to a rotating device of an injection mold and has high stability and reliability.

[0005] The invention also provides an injection molding system.

[0006] According to the first aspect of the present invention, the hydraulic system of a rotatable device includes a fixed component, a swivel joint component, an external oil circuit component and a rotating shaft, wherein the fixed component is used for rotatably mounting the rotating device; the swivel joint component is arranged on the fixed component and is distributed relative to the rotating device; the external oil circuit component is connected to the swivel joint component; the rotating shaft can rotate synchronously with the rotating device, and an internal oil circuit connecting a mold driving component of the rotating device and the swivel joint component is arranged in the rotating shaft.

[0007] The hydraulic system of the rotatable device according to the embodiment of the present invention has at least the following beneficial effects: the external oil circuit component is connected to the swivel joint component, and the internal oil circuit in the rotating shaft can rotate synchronously with the rotating shaft and the rotating device through the swivel joint component, so as to realize the oil supply to the mold driving component of the rotating device, and the swivel joint component is relatively distributed with the rotating device, and is connected to the corresponding mold driving component through the internal oil circuit in the rotating shaft, so that the oil sealing components of the swivel joint assembly are not arranged on the rotating device, the oil sealing components are not easily affected by the rotating device, the oil sealing components can maintain the effect of adding sealing oil, and the oil circuit is less affected by the mold temperature, thereby reducing the occurrence of oil leakage, so that the hydraulic system has higher stability and reliability, and can meet the configuration requirements of the high-pressure oil circuit in the rotating device of the injection molding equipment.

[0008] According to some embodiments of the present invention, the swivel joint assembly includes a fixed end and a rotating core, the fixed end is fixedly installed on the fixed assembly, the fixed end is provided with an inner hole rotatably matched with the rotating core, the rotating core can rotate synchronously with the rotating device, and a plurality of annular cavities spaced apart in the axial direction are formed between the inner wall of the inner hole of the fixed end and the outer wall of the rotating core, the external oil circuit assembly is connected to the fixed end and communicated with the annular cavity, the rotating core is connected to the rotating shaft and is provided with the internal oil circuit, and the internal oil circuit is communicated with the annular cavity.

[0009] According to some embodiments of the present invention, the rotating shaft extends into the rotating device and corresponds to the mold driving component of the rotating device, so that the internal oil circuit interfaces with the mold driving component.

[0010] According to some embodiments of the present invention, the rotating shaft is fixedly connected to the mold driving member of the rotating device.

[0011] According to some embodiments of the present invention, the mold driving component includes an ejection oil cylinder and a neutron joint, and the external oil circuit assembly includes an ejection oil circuit assembly and a neutron oil circuit assembly.

[0012] According to some embodiments of the present invention, spacer sealing rings are provided between adjacent annular cavities.

[0013] According to some embodiments of the present invention, an inner wall of the inner hole of the fixed end is provided with an annular spacing groove capable of receiving the spacing sealing ring.

[0014] According to some embodiments of the present invention, an end face sealing ring is provided between the inner wall of the end of the inner hole of the fixed end and the outer wall of the rotating core.

[0015] According to some embodiments of the present invention, an inner wall at the end of the inner hole of the fixed end is provided with an annular end face groove capable of receiving the end face sealing ring.

[0016] According to some embodiments of the present invention, the fixing assembly includes a fixing shaft, and a through hole is provided in the middle of the fixing shaft, through which the rotating shaft can pass and which is rotatably matched with the rotating shaft.

[0017] The injection molding system according to the second embodiment of the present invention comprises the hydraulic system of the rotatable device of any one embodiment of the first embodiment of the present invention.

[0018] The injection molding system according to the embodiment of the present invention has at least the following beneficial effects: it can meet the requirements of injection molding products of multiple materials, and the stability and reliability of the hydraulic system are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a hydraulic system of a rotatable device according to an embodiment of the present invention when it is applied;

[0021] Figure 2 It is a structural schematic diagram of a hydraulic system according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the internal structure of a hydraulic system according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the oil circuit of the hydraulic system of an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the internal structure of a swivel joint assembly according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] A fixing assembly 100, a fixing shaft 110, and a supporting plate 120;

[0027] The rotary joint assembly 200, the annular cavity 201, the fixed end 210, the annular spacing groove 211, the external joint 212, the rotating core 220, the spacing sealing ring 230, and the end face sealing ring 240;

[0028] External oil circuit assembly 300, top oil circuit assembly 310, neutron oil circuit assembly 320;

[0029] Internal oil circuit 400;

[0030] Rotating shaft 500;

[0031] Rotating device 900 , ejection cylinder 910 , and neutron joint 920 . DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Reference below Figures 1 to 5 A hydraulic system for a rotatable device according to an embodiment of the present invention is described.

[0037] like Figures 1 to 3 As shown, the hydraulic system of a rotatable device according to an embodiment of the present invention includes a fixed component 100, a swivel joint component 200, an external oil circuit component 300 and a rotating shaft 500, wherein the fixed component 100 is used for rotatably mounting the rotating device 900; the swivel joint component 200 is arranged on the fixed component 100 and is distributed relative to the rotating device 900; the external oil circuit component 300 is connected to the swivel joint component 200; the rotating shaft 500 can rotate synchronously with the rotating device 900, and the rotating shaft 500 is provided with a mold driving component connected to the rotating device 900 and an internal oil circuit 400 of the swivel joint component 200.

[0038] The external oil circuit assembly 300 is connected to the swivel joint assembly 200, and the internal oil circuit 400 in the rotating shaft 500 can rotate synchronously with the rotating shaft 500 and the rotating device 900 through the swivel joint assembly 200, thereby realizing the oil supply to the mold driving component of the rotating device 900, and the swivel joint assembly 200 is relatively distributed with the rotating device 900, and is connected to the corresponding mold driving component through the internal oil circuit 400 in the rotating shaft 500, so that the oil sealing components of the swivel joint assembly 200 are not arranged on the rotating device 900, the oil sealing components are not easily affected by the rotating device 900, the oil sealing components can maintain the effect of the added sealing oil, and the oil circuit is less affected by the mold temperature, reducing the occurrence of oil leakage, so that the hydraulic system has higher stability and reliability, and can meet the configuration requirements of the high-pressure oil circuit in the rotating device 900 of the injection molding equipment.

[0039] Specifically, the swivel joint assembly 200 enables the internal oil circuit 400 to rotate synchronously with the rotating equipment 900 to meet the oil supply requirements under rotating conditions. In order to meet the rotary oil supply requirements, the swivel joint assembly 200 is configured with more oil sealing components. In the invention, the swivel joint assembly 200 is set at a position away from the rotating equipment 900, so that the oil sealing component is not easily affected by the temperature of the rotating equipment 900 and maintains good sealing performance. In addition, the swivel joint assembly 200 is connected to the corresponding mold driving component through the internal oil circuit 400 in the rotating shaft 500, which can effectively isolate the oil circuit from the rotating equipment 900, reduce the impact of the rotating equipment 900 on the oil circuit, and maintain good performance of the hydraulic system.

[0040] like Figure 2 As shown, in some embodiments of the present invention, the fixed assembly 100 includes a support plate 120, the rotating device 900 is rotatably arranged above the support plate 120, and the swivel joint assembly 200 is arranged below the support plate 120 to separate the rotating device 900 and the swivel joint assembly 200, reasonably layout the oil circuit, and improve the reliability of the oil circuit.

[0041] Specifically, the external oil circuit components 300 are connected to the rotary joint components 200 below the support plate 120. The related equipment of the oil circuit, such as the solenoid valve, oil tank, oil collecting block, etc., can be set at a position away from the mold using the external oil circuit components 300. The layout is reasonable, and the rotating equipment 900 and the mold have less impact on the oil circuit, so as to maintain the good performance of the hydraulic system.

[0042] like Figure 3 , Figure 4 , Figure 5As shown, in some embodiments of the present invention, the rotary joint assembly 200 includes a fixed end 210 and a rotating core 220. The fixed end 210 is fixedly installed on the fixed assembly 100. The fixed end 210 is provided with an inner hole rotatably matched with the rotating core 220. The rotating core 220 can rotate synchronously with the rotating device 900. A plurality of annular cavities 201 spaced apart along the axial direction are formed between the inner wall of the inner hole of the fixed end 210 and the outer wall of the rotating core 220. The external oil circuit assembly 300 is connected to the fixed end 210 and communicated with the annular cavity 201. An internal oil circuit 400 is provided in the rotating core 220. The internal oil circuit 400 is communicated with the annular cavity 201. The function of rotary oil supply is realized by the setting of the annular cavity 201.

[0043] Specifically, when used, the fixed end 210 is arranged on the fixed component 100, and the rotating core 220 can rotate with the rotating device 900. The oil circuit of the fixed end 210 is connected with the oil circuit of the rotating core 220 through the annular cavity 201, so that the oil circuit can still be kept unobstructed when the rotating core 220 rotates.

[0044] It should be noted that Figure 5 The annular cavity 201 indicated in the figure is in the state after oil filling, that is, the oblique line area is hydraulic oil.

[0045] In some embodiments of the present invention, the number of annular cavities 201 is configured according to the number of external oil circuit components 300 and internal oil circuits 400 to achieve independent oil supply.

[0046] like Figure 3 , Figure 4 , Figure 5 As shown, in some embodiments of the present invention, the fixed end 210 is provided with an external connector 212 corresponding to the external oil circuit assembly 300 to facilitate connection with the oil pipe.

[0047] like Figure 3 As shown, in some embodiments of the present invention, the rotating shaft 500 extends into the rotating device 900 and corresponds to the mold driving component of the rotating device 900, so that the internal oil circuit 400 is connected to the mold driving component, the structure is more compact and reasonable, and the reliability is higher.

[0048] Specifically, the rotating shaft 500 and the rotating core 220 are a metal component, and the internal oil circuit 400 is formed in the rotating shaft 500 and the rotating core 220 by machining or other means, which can reduce the use of rubber pipes and connecting seals and reduce the impact of mold temperature on the oil circuit.

[0049] It should be noted that Figure 4 The internal oil path 400 indicated in the figure is the state of the hydraulic oil in actual application, that is, the flow path of the hydraulic oil in the rotating shaft 500 .

[0050] In some embodiments of the present invention, the rotating shaft 500 and the rotating core 220 are an integral structure, that is, an integral shaft, which has a simpler structure and better sealing performance.

[0051] It can be understood that in some embodiments of the present invention, the rotating shaft 500 and the rotating core 220 can also be independent structures, which are then assembled and connected, and the corresponding internal oil circuits 400 are connected.

[0052] It can be understood that, in some embodiments of the present invention, the rotary joint assembly 200 may also be a conventional universal joint or a rotary joint, which may also meet the requirements of the oil circuit rotary connection.

[0053] like Figure 3 , Figure 4 As shown, in some embodiments of the present invention, the rotating shaft 500 is fixedly connected to the mold driving component of the rotating device 900, that is, the mold driving component is fixedly arranged at the upper end of the rotating shaft 500, so that the oil circuit basically does not pass through the rotating device 900 and is less affected by the temperature of the rotating device 900 and the mold.

[0054] like Figure 3 , Figure 4 As shown, in some embodiments of the present invention, the mold driving component includes an ejector oil cylinder 910 and a neutron joint 920, and the external oil circuit assembly 300 includes an ejector oil circuit assembly 310 and a neutron oil circuit assembly 320 to control the oil supply to the ejector oil cylinder 910 and the neutron joint 920.

[0055] Specifically, the neutron connector 920 is used to be connected to the mold cylinder or hydraulic motor to achieve a set hydraulic drive function. The neutron connector 920 is an extended oil nozzle so as to extend outside the rotating device 900 to be connected to a corresponding driving component.

[0056] like Figure 5 As shown, in some embodiments of the present invention, spacer sealing rings 230 are provided between adjacent annular cavities 201 to improve the sealing and isolation effect between the annular cavities 201 .

[0057] Specifically, the spacing seal ring 230 is an O-type seal ring. Of course, in the specific implementation process, the spacing seal ring 230 is a skeleton-type oil seal or other special-shaped seal rings.

[0058] like Figure 5 As shown, in some embodiments of the present invention, the inner wall of the inner hole of the fixed end 210 is provided with an annular spacing groove 211 for the spacing sealing ring 230 to be installed, so as to facilitate the installation and positioning of the spacing sealing ring 230 and improve the reliability of the seal.

[0059] It is conceivable that, in some embodiments of the present invention, a groove may be provided on the outer wall of the rotating core 220 to position the spacer sealing ring 230, which will not be described in detail herein.

[0060] like Figure 5 As shown, in some embodiments of the present invention, an end face sealing ring 240 is provided between the inner wall of the end of the inner hole of the fixed end 210 and the outer wall of the rotating core 220 to improve the sealing effect of the end face or mating surface of the swivel joint assembly 200.

[0061] Specifically, the end of the fixed end 210 is connected to the support plate 120 or the cover plate, and the end face sealing ring 240 is configured to reduce the occurrence of oil leakage.

[0062] In some embodiments of the present invention, the end face sealing ring 240 is a skeleton oil seal. Of course, in the specific implementation process, the end face sealing ring 240 can also be an O-ring or other special-shaped sealing ring.

[0063] like Figure 5 As shown, in some embodiments of the present invention, the inner wall of the end of the inner hole of the fixed end 210 is provided with an annular end face groove for the end face sealing ring 240 to be installed, so as to facilitate the positioning of the end face sealing ring 240 and improve the sealing effect.

[0064] like Figure 3 As shown, in some embodiments of the present invention, the fixing assembly 100 includes a fixing shaft 110, and a through hole is provided in the middle of the fixing shaft 110 for the rotation shaft 500 to pass through and rotatably cooperate with the rotation shaft 500, so as to realize the connection of the oil circuits of the upper and lower components.

[0065] Specifically, the fixed shaft 110 is disposed on the support plate 120, approximately located at the center of the rotating device 900. Through the above design, the rotating shaft 500 is approximately coaxial with the rotating device 900, and the mechanism components are more reasonable and compact.

[0066] When in use, after the fixed end 210 of the swivel joint assembly 200 is assembled with the rotating shaft 500, it can be directly installed through the bottom of the support plate 120, so that the rotating shaft 500 is inserted into the rotating device 900, and then the ejection cylinder 910 and the neutron joint 920 are connected to the upper end of the rotating shaft 500 to complete the connection of the oil circuit system, which is very convenient for disassembly, assembly and maintenance.

[0067] The injection molding system according to the second aspect of the present invention includes the hydraulic system of the rotatable device of any embodiment of the first aspect of the present invention, which can meet the requirements of multi-material injection molding products, and the hydraulic system has high stability and reliability.

[0068] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A hydraulic system for a rotatable device, characterized in that: include: A fixing assembly (100) for rotatably mounting the rotating device (900); A swivel joint assembly (200), arranged on the fixed assembly (100) and arranged opposite to the rotating device (900); An external oil circuit assembly (300) is connected to the rotary joint assembly (200); a rotating shaft (500) is capable of rotating synchronously with the rotating device (900), and an internal oil circuit (400) is provided in the rotating shaft (500) that is connected to a mold driving component of the rotating device (900) and the rotary joint assembly (200).

2. The hydraulic system for a rotatable device according to claim 1, characterized in that: The swivel joint assembly (200) comprises a fixed end (210) and a rotating core (220), wherein the fixed end (210) is fixedly mounted on the fixed assembly (100), the fixed end (210) is provided with an inner hole rotatably matched with the rotating core (220), the rotating core (220) can rotate synchronously with the rotating device (900), a plurality of annular cavities (201) spaced apart along the axial direction are formed between the inner wall of the inner hole of the fixed end (210) and the outer wall of the rotating core (220), the external oil circuit assembly (300) is connected to the fixed end (210) and communicated with the annular cavity (201), the rotating core (220) is docked with the rotating shaft (500) and is provided with the internal oil circuit (400), and the internal oil circuit (400) is communicated with the annular cavity (201).

3. The hydraulic system for a rotatable device according to claim 2, characterized in that: The rotating shaft (500) extends into the rotating device (900) and corresponds to the mold driving component of the rotating device (900), so that the internal oil passage (400) is connected to the mold driving component.

4. The hydraulic system for a rotatable device according to claim 3, characterized in that: The rotating shaft (500) is fixedly connected to the mold driving component of the rotating device (900).

5. The hydraulic system for a rotatable device according to claim 4, characterized in that: The mold driving component comprises an ejection oil cylinder (910) and a neutron joint (920), and the external oil circuit assembly (300) comprises an ejection oil circuit assembly (310) and a neutron oil circuit assembly (320).

6. The hydraulic system for rotatable equipment according to claim 2, characterized in that: A spacing sealing ring (230) is provided between adjacent annular cavities (201).

7. The hydraulic system for rotatable equipment according to claim 2, characterized in that: An end face sealing ring (240) is provided between the inner wall of the end of the inner hole of the fixed end (210) and the outer wall of the rotating core (220).

8. The hydraulic system for a rotatable device according to claim 8, characterized in that: An inner wall at the end of the inner hole of the fixed end (210) is provided with an annular end face groove capable of receiving the end face sealing ring (240).

9. The hydraulic system for rotatable equipment according to claim 1, characterized in that: The fixing assembly (100) comprises a fixing shaft (110), and a through hole is provided in the middle of the fixing shaft (110) for allowing the rotating shaft (500) to pass through and for rotatably cooperating with the rotating shaft (500).

10. Injection molding system, characterized in that, include: A hydraulic system for rotatable equipment as claimed in any one of claims 1 to 9.

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