Hydraulic system for a rotatable apparatus and injection molding system

Abstract

The application discloses a kind of hydraulic system of rotatable equipment and injection molding system, and hydraulic system includes fixed assembly, swivel joint assembly, external oil circuit assembly and rotating shaft, swivel joint assembly is located in fixed assembly;External oil circuit assembly is connected to swivel joint assembly;Rotating shaft can be rotated with rotatable equipment, and rotating shaft is provided with the internal oil circuit of mould driving component connected with rotatable equipment and swivel joint assembly, external oil circuit assembly is connected to swivel joint assembly, by swivel joint assembly, so that the internal oil circuit in rotating shaft can be rotated with rotating shaft and rotatable equipment, to realize the oil supply to the mould driving component of rotatable equipment, and the oil seal component of swivel joint assembly is not set in rotatable equipment, oil seal component is not easily affected by rotatable equipment, oil seal component can keep the effect of good sealing oil, and oil circuit is less affected by mould temperature, reduce the occurrence of oil leakage, so that hydraulic system has higher stability and reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to a hydraulic system of a rotatable device and an injection system. BACKGROUND

[0002] For a mold with multiple products and multiple stations, a dedicated rotating device is usually configured to set multiple sets of molds, and the multiple stations are switched by rotating to different positions. The rotating device is configured with a driving mechanism of the mold, such as an ejection cylinder and a middle cylinder.

[0003] Because the hydraulic oil is affected by the temperature of the rotating device and the mold, the temperature of the hydraulic oil rises, which affects the sealing effect of the sealing system, and oil leakage is prone to occur. Therefore, it is difficult to build a high-pressure oil circuit in such a rotating device. Currently, only gas ejection can be used in such a rotating device. However, the pressure of gas ejection is usually only 5kgf, while the hydraulic system of the device can reach 140kgf, and the ejection speed cannot be controlled. Therefore, the effect of gas pressure driving is not ideal. SUMMARY

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

[0005] The present application also provides an injection system.

[0006] The hydraulic system of the rotatable device according to the first aspect of the present application comprises a fixed component, a rotary joint component, an external oil circuit component and a rotating shaft. The fixed component is used to rotatably install the rotating device. The rotary joint component is arranged on the fixed component and is distributed opposite to the rotating device. The external oil circuit component is connected to the rotary joint component. The rotating shaft can rotate synchronously with the rotating device. The rotating shaft is provided with a mold driving member connected to the rotating device and an internal oil circuit connected to the rotary joint component.

[0007] The hydraulic system of the rotatable device has at least the following beneficial effects: the external oil path assembly is connected to the swivel joint assembly, the internal oil path in the rotating shaft is made to rotate synchronously with the rotating shaft and the rotatable device through the swivel joint assembly, thereby realizing oil supply to the mold driving members of the rotatable device, the swivel joint assembly is distributed relative to the rotatable device, and is connected to the corresponding mold driving members through the internal oil path in the rotating shaft, so that the oil seal members of the swivel joint assembly are not arranged in the rotatable device, the oil seal members are not easily affected by the rotatable device, the oil seal members can maintain the effect of good oil sealing, the oil path is less affected by the mold temperature, the occurrence of oil leakage is reduced, the hydraulic system has high stability and reliability, and the configuration requirements of the high-pressure oil path in the rotatable device of the injection molding device can be met.

[0008] According to some embodiments of the present application, the swivel joint assembly comprises 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 in rotatable cooperation with the rotating core, the rotating core can rotate synchronously with the rotatable device, a plurality of annular cavities are formed between the inner wall of the inner hole of the fixed end and the outer wall of the rotating core and are distributed in the axial direction, the external oil path assembly is connected to the fixed end and communicates with the annular cavities, the rotating core is connected to the rotating shaft and is provided with the internal oil path, and the internal oil path communicates with the annular cavities.

[0009] According to some embodiments of the present application, the rotating shaft extends into the rotatable device and corresponds to the mold driving members of the rotatable device, so that the internal oil path is connected to the mold driving members.

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

[0011] According to some embodiments of the present application, the mold driving members comprise ejection oil cylinders and middle sub joints, and the external oil path assembly comprises ejection oil path assemblies and middle oil path assemblies.

[0012] According to some embodiments of the present application, a spacing sealing ring is arranged between adjacent annular cavities.

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

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

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

[0016] According to some embodiments of the present application, the fixing assembly comprises a fixing shaft, a through hole is arranged in the middle of the fixing shaft, and the through hole is capable of allowing the rotating shaft to pass through and rotatably match with the rotating shaft.

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

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

[0019] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0020] Figure 1 Structure schematic diagram for application of the hydraulic system of the rotatable device according to the embodiments of the present application;

[0021] Figure 2 Structure schematic diagram of the hydraulic system according to the embodiments of the present application;

[0022] Figure 3 Internal structure schematic diagram of the hydraulic system according to the embodiments of the present application;

[0023] Figure 4 Oil path schematic diagram of the hydraulic system according to the embodiments of the present application;

[0024] Figure 5 Internal structure schematic diagram of the rotary joint assembly according to the embodiments of the present application.

[0025] Reference Signs:

[0026] Fixing assembly 100, fixing shaft 110, support plate 120;

[0027] Rotary joint assembly 200, annular cavity 201, fixed end 210, annular interval groove 211, external joint 212, rotating core 220, interval sealing ring 230, end face sealing ring 240;

[0028] External oil path assembly 300, ejection oil path assembly 310, middle oil path assembly 320;

[0029] Internal oil path 400;

[0030] Rotating shaft 500;

[0031] Rotary device 900, ejection oil cylinder 910, middle joint 920. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0034] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] The following is for reference. 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 the rotatable device according to an embodiment of the present invention includes a fixed component 100, a rotary joint assembly 200, an external oil circuit assembly 300, and a rotating shaft 500. The fixed component 100 is used to rotatably mount the rotating device 900. The rotary joint assembly 200 is disposed on the fixed component 100 and is distributed opposite to the rotating device 900. The external oil circuit assembly 300 is connected to the rotary joint assembly 200. The rotating shaft 500 can rotate synchronously with the rotating device 900. The rotating shaft 500 is provided with an internal oil circuit 400 that connects the mold driving component of the rotating device 900 and the rotary joint assembly 200.

[0038] The external oil path assembly 300 is connected to the swivel joint assembly 200, and the internal oil path 400 in the rotating shaft 500 can rotate synchronously with the rotating shaft 500 and the rotating equipment 900 through the swivel joint assembly 200, so as to realize oil supply to the mold driving member of the rotating equipment 900, and the swivel joint assembly 200 is distributed relative to the rotating equipment 900 and connected to the corresponding mold driving member through the internal oil path 400 in the rotating shaft 500, so that the oil sealing members of the swivel joint assembly 200 are not arranged on the rotating equipment 900, the oil sealing members are not easily affected by the rotating equipment 900, the oil sealing members can maintain the effect of good sealing oil, the oil path is less affected by the mold temperature, the oil leakage is reduced, the hydraulic system has high stability and reliability, and the configuration requirements of the high-pressure oil path in the rotating equipment 900 of the injection molding equipment can be met.

[0039] Specifically, the swivel joint assembly 200 enables the internal oil path 400 to rotate synchronously with the rotating equipment 900, meets the oil supply requirement under the rotating condition, and is provided with more oil sealing members to meet the rotating oil supply requirement. In the application, the swivel joint assembly 200 is arranged away from the rotating equipment 900, so that the oil sealing members are not easily affected by the temperature of the rotating equipment 900, good sealing performance is maintained, and the swivel joint assembly 200 is connected to the corresponding mold driving member through the internal oil path 400 in the rotating shaft 500, so as to effectively isolate the oil path from the rotating equipment 900, reduce the influence of the rotating equipment 900 on the oil path, and maintain good performance of the hydraulic system.

[0040] As shown in Figure 2 In some embodiments of the application, the fixed assembly 100 includes a support plate 120, and the rotating equipment 900 is arranged above the support plate 120, and the swivel joint assembly 200 is arranged below the support plate 120 to separate the rotating equipment 900 from the swivel joint assembly 200, reasonably arrange the oil path, and improve the reliability of the oil path.

[0041] Specifically, the external oil path assembly 300 is connected to the swivel joint assembly 200 below the support plate 120, and the related equipment of the oil path such as the electromagnetic valve, the oil tank, and the oil collecting block can be arranged away from the mold by using the external oil path assembly 300, so as to be reasonably arranged, the rotating equipment 900 and the mold have less influence on the oil path, and the good performance of the hydraulic system is maintained.

[0042] As shown in Figure 3 , Figure 4 , Figure 5As shown in some embodiments of the present application, 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 equipment 900, the inner wall of the inner hole of the fixed end 210 and the outer wall of the rotating core 220 form a plurality of annular cavities 201 distributed along the axial direction, the external oil circuit assembly 300 is connected to the fixed end 210 and communicates with the annular cavities 201, the rotating core 220 is provided with an internal oil circuit 400, the internal oil circuit 400 communicates with the annular cavities 201, and the annular cavities 201 are arranged to realize the function of rotary oil supply.

[0043] Specifically, in application, the fixed end 210 is arranged on the fixed assembly 100, and the rotating core 220 can rotate with the rotating equipment 900, and the oil circuit of the fixed end 210 and the oil circuit of the rotating core 220 are connected through the annular cavities 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 cavities 201 marked in the figure are in the state after oil injection, that is, the oblique line area is hydraulic oil.

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

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

[0047] As Figure 3 shown, in some embodiments of the present application, the rotating shaft 500 extends into the rotating equipment 900 and corresponds to the mold driving member of the rotating equipment 900, so that the internal oil circuit 400 is connected with the mold driving member, and 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 member, 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 application of rubber pipes and connection sealing elements and reduce the influence of mold temperature on the oil circuit.

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

[0050] In some embodiments of the present application, the rotating shaft 500 and the rotating core 220 are integrated, i.e. an integral shaft, which is simpler in structure and better in sealing.

[0051] It can be understood that, in some embodiments of the present application, the rotating shaft 500 and the rotating core 220 can also be independent structures, and then assembled and connected, and the corresponding internal oil circuit 400 is formed in butt joint.

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

[0053] As shown in Figure 3 , Figure 4 , in some embodiments of the present application, the rotating shaft 500 is fixedly connected with the mold driving member of the rotating device 900, i.e. the mold driving member is fixedly arranged at the upper end of the rotating shaft 500, so that the oil circuit is basically not passed through the rotating device 900, and is less affected by the temperature of the rotating device 900 and the mold.

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

[0055] Specifically, the sub joint 920 is used to be connected with the mold oil cylinder or the hydraulic motor, to realize the set hydraulic driving function, and the sub joint 920 is an elongated oil nozzle, so as to be extended to the outside of the rotating device 900 and connected with the corresponding driving member.

[0056] As shown in Figure 3 , in some embodiments of the present application, a spacing sealing ring 230 is arranged between adjacent annular cavities 201, to improve the sealing isolation effect between the annular cavities 201.

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

[0058] As shown in Figure 4 , in some embodiments of the present application, the inner wall of the inner hole of the fixed end 210 is provided with an annular spacing groove 211 capable of accommodating the spacing sealing ring 230, so as to facilitate the installation and positioning of the spacing sealing ring 230, to improve the reliability of the sealing.

[0059] It can be conceived that, in some embodiments of the present application, a groove can also be arranged on the outer wall of the rotating core 220 to position the spacing sealing ring 230, which is not described in detail here.

[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 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 rotary 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 oil leakage is reduced by configuring the end face sealing ring 240.

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

[0063] 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 end face groove for the end face sealing ring 240 to be inserted, so as to facilitate the positioning of the end face sealing ring 240 and improve the sealing effect.

[0064] like Figure 5 Figure 5 Figure 3 As shown, in some embodiments of the present invention, the fixing component 100 includes a fixing shaft 110, and the fixing shaft 110 has a through hole in the middle that allows the rotating shaft 500 to pass through and rotatably engage with the rotating shaft 500, thereby realizing the connection of the oil passages of the upper and lower components.

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

[0066] In application, after the fixed end 210 of the rotary joint assembly 200 is assembled with the rotating shaft 500, it can be directly inserted under the support plate 120 so that the rotating shaft 500 is inserted into the rotating equipment 900. Then, the ejector cylinder 910 and the neutron connector 920 are connected to the upper end of the rotating shaft 500 to complete the connection of the oil circuit system. Disassembly, assembly and maintenance are very convenient.

[0067] The injection molding system according to a second aspect of the present invention includes a hydraulic system of a rotatable device according to any of the first aspects of the present invention, which can meet the requirements of injection molding products with multiple materials, and the hydraulic system has high stability and reliability.

[0068] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A hydraulic system for a rotatable device, characterized in that, include: A fixed assembly (100) is used for rotatably mounting a rotating device (900); A rotary joint assembly (200) is disposed on the fixed assembly (100) and distributed opposite to the rotating device (900); An external oil passage assembly (300) is connected to the rotary joint assembly (200); A rotating shaft (500) is provided, which can rotate synchronously with the rotating device (900). The rotating shaft (500) is provided with an internal oil passage (400) for connecting the mold driving component of the rotating device (900) and the rotary joint assembly (200). The fixing component (100) includes a support plate (120), the rotating device (900) is rotatably disposed above the support plate (120), and the rotary joint assembly (200) is disposed below the support plate (120) to separate the rotating device (900) from the rotary joint assembly (200). 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) has an inner hole that rotatably engages with the rotating core (220). The rotating core (220) can rotate synchronously with the rotating device (900). A plurality of annular cavities (201) are formed between the inner wall of the inner hole of the fixed end (210) and the outer wall of the rotating core (220) along the axial direction. The external oil passage assembly (300) is connected to the fixed end (210) and communicates with the annular cavity (201). The rotating core (220) is connected to the rotating shaft (500) and has an internal oil passage (400). The internal oil passage (400) communicates with the annular cavity (201). 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; The rotating shaft (500) and the rotating core (220) are metal components, and the internal oil passage (400) is formed in the rotating shaft (500) and the rotating core (220) by machining process.

2. The hydraulic system of the rotatable device according to claim 1, characterized in that, The rotating shaft (500) is fixedly connected to the mold driving component of the rotating device (900).

3. The hydraulic system of the rotatable device according to claim 2, characterized in that, The mold driving component includes an ejector cylinder (910) and a neutron connector (920), and the external oil circuit assembly (300) includes an ejector oil circuit assembly (310) and a neutron oil circuit assembly (320).

4. The hydraulic system of the rotatable device according to claim 1, characterized in that, A spacer sealing ring (230) is provided between adjacent annular cavities (201).

5. The hydraulic system of the rotatable device according to claim 1, characterized in that, An end face sealing ring (240) is provided between the inner wall of the inner hole of the fixed end (210) and the outer wall of the rotating core (220).

6. The hydraulic system of the rotatable device according to claim 5, characterized in that, The inner wall of the inner hole of the fixed end (210) is provided with an annular end face groove into which the end face sealing ring (240) can be inserted.

7. The hydraulic system of the rotatable device according to claim 1, characterized in that, The fixing component (100) includes a fixing shaft (110), and the fixing shaft (110) has a through hole in the middle that allows the rotating shaft (500) to pass through and rotatably engage with the rotating shaft (500).

8. An injection molding system, characterized in that, include: The hydraulic system of the rotatable device as described in any one of claims 1 to 7.

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