Primary-secondary type injection oil cylinder for extrusion casting machine
The sub-mother cylinder system for casting machines addresses the inefficiencies of traditional systems by enabling rapid injection and stable pressure without energy storage, reducing energy consumption and simplifying the system for improved production efficiency.
Patent Information
- Application Number
- CN202421633942.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The traditional extrusion casting machine uses energy accumulators and nitrogen tanks to increase production preparation time and equipment complexity, and the large-displacement oil pump has high energy consumption, which affects production efficiency and cost.
The structure of the mother-child type press-injection oil cylinder is adopted, including the press-injection oil cylinder and the fast oil cylinder. The rapid oil cylinder achieves rapid press-injection under small flow supply, and combined with the press-injection oil cylinder, the use of the energy accumulator is cancelled.
It improves the injection speed, reduces the system flow demand and oil pump displacement, simplifies the structure, shortens the production cycle, and reduces energy consumption and equipment costs.
Smart Images
Figure CN223097972U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection cylinders of die-casting machines, and particularly relates to a mother-child type injection cylinder for an extrusion casting machine. Background Art
[0002] Traditional extrusion casting machines use injection cylinders with large cylinder diameters to achieve rapid injection molding of castings. During the rapid injection process, since hydraulic actuators require a very large flow rate and energy supply, accumulators and nitrogen gas tanks need to be configured as auxiliary power sources. During rapid injection, the accumulator provides instantaneous flow rate compensation to meet the requirements of the injection cylinder for high pressure and large flow rate. However, in the above traditional device solution, the accumulator needs to store energy in advance, which increases the production preparation time and reduces the production efficiency; moreover, the accumulator and nitrogen gas tank also increase the complexity of the device system, the floor area and the maintenance cost. On the other hand, during the extrusion casting process, it is necessary to ensure a constant injection force. Therefore, the oil pump used in conjunction with the traditional injection cylinder needs to have a large displacement, which not only increases the equipment cost, but also the energy consumption of the large-displacement oil pump is high, which is not conducive to energy conservation and emission reduction.
[0003] To solve the above background problems, the utility model proposes a mother-child type injection cylinder for an extrusion casting machine, which can achieve the speed of the traditional injection cylinder without using an accumulator, and at the same time keep the injection force unchanged during boosting injection. The extrusion casting machine adopting the utility model has high structural strength, no energy storage time required, and at the same time the displacement of the oil pump is small and the energy consumption is low. It should be noted that the above information disclosed in this background art part is only used to understand the background art of the inventive concept of the utility model, and therefore, it may include information that does not constitute the prior art. Summary of the Utility Model
[0004] The utility model proposes a mother-child type injection cylinder for an extrusion casting machine, which can achieve the speed of the traditional injection cylinder without using an accumulator, and at the same time the injection force remains unchanged during boosting injection. The technical solution adopted is: it includes an injection cylinder and a rapid cylinder, where the injection cylinder serves as the mother cylinder and the rapid cylinder serves as the son cylinder; the front end of the plunger of the rapid cylinder is inserted into the central blind hole of the piston rod of the injection cylinder. Therefore, the piston rod of the injection cylinder is substantially also the cylinder body of the rapid cylinder. The rapid cylinder is used to achieve rapid injection under the condition of small flow rate supply, and the injection cylinder is used to achieve the pressure-holding and solidifying function of the extrusion casting machine.
[0005] The specific technical solution adopted by the utility model is:
[0006] It includes a shot cylinder and a fast cylinder, where the shot cylinder serves as the master cylinder and the fast cylinder serves as the slave cylinder; the shot cylinder is located outside the fast cylinder; the telescopic directions of the shot cylinder and the fast cylinder are the same. The shot cylinder includes: a shot cylinder barrel, a shot cylinder piston, a shot cylinder piston rod, a shot cylinder flange, a rear shot cylinder head, and a front shot cylinder head. The shot cylinder piston and the shot cylinder piston rod are fixedly connected; a central blind hole is provided on the shot cylinder piston rod; the shot cylinder piston can move back and forth in the inner hole of the shot cylinder barrel; the outer diameter of the shot cylinder piston rod is smaller than the inner diameter of the shot cylinder barrel. The rear shot cylinder head and the front shot cylinder head are respectively located at both ends of the shot cylinder barrel; the central protruding parts of the rear shot cylinder head and the front shot cylinder head are inserted into the inner hole of the shot cylinder barrel; the shot cylinder flange is an annular part; threads are provided on the surface of the central inner hole of the shot cylinder flange, and it is fixedly connected to the outer circular surfaces at both ends of the shot cylinder barrel respectively by means of threaded connection; the two shot cylinder flanges are fixedly connected to the upper surface of the rear shot cylinder head and the lower surface of the front shot cylinder head respectively through the flanges thereon; the front shot cylinder head is provided with a front oil inlet and outlet port, which is arranged on the side of the front shot cylinder head and communicates with the central through hole of the front shot cylinder head. The rear shot cylinder head is provided with a rear oil inlet and outlet port; the number of the rear oil inlet and outlet ports is 2, which are symmetrically arranged on the side of the rear shot cylinder head and communicate with the central through hole of the rear shot cylinder head. The fast cylinder includes: a fast cylinder plunger and a fast cylinder head. A central through hole is provided on the fast cylinder plunger; the front end of the fast cylinder plunger is inserted into the central blind hole of the shot cylinder piston rod, and the rear end of the fast cylinder plunger is fixedly connected to the rear shot cylinder head through a flange.
[0007] When the system flow rate is small, the system oil is directly supplied to the fast cylinder, and the fast injection of the shot cylinder is realized through the movement of the fast cylinder plunger. At this time, oil enters through the central through hole of the fast cylinder plunger, the rear oil inlet and outlet port of the shot cylinder sucks oil from the fuel tank, and the front oil inlet and outlet port of the shot cylinder discharges oil to the fuel tank;
[0008] When entering the boosting injection stage, the injection speed slows down, and the system oil is supplied to both the shot cylinder and the fast cylinder simultaneously to ensure the stable output of the injection force. At this time, oil enters through the central through hole of the fast cylinder plunger, the rear oil inlet and outlet port of the shot cylinder enters oil from the fuel tank, and the front oil inlet and outlet port discharges oil to the fuel tank;
[0009] When the injection is completed, the shot cylinder resets. At this time, the oil in the central through hole of the fast cylinder plunger is discharged, the rear oil inlet and outlet port of the shot cylinder discharges oil to the fuel tank, and the front oil inlet and outlet port of the shot cylinder enters oil from the fuel tank.
[0010] Compared with the prior art, the present utility model has remarkable advantages and beneficial effects, which are specifically reflected in the following aspects:
[0011] 1) By means of the master-slave cylinder structure, the injection speed is increased. Especially when the system flow rate is small, rapid injection can still be achieved.
[0012] 2) The system flow rate requirement is reduced, the displacement of the oil pump is decreased, thereby reducing the energy consumption.
[0013] 3) The structure of the injection system is simplified, the production cycle is shortened, and the production efficiency is improved.
[0014] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings to further elaborate on the utility model in detail. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The attached drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0016] Figure 1 is the external view schematic diagram of the device of the present utility model;
[0017] Figure 2 is the structural schematic diagram of the initial state of the device of the present utility model;
[0018] Figure 3 is Figure 2 the partial enlarged view of;
[0019] Figure 4 is the structural schematic diagram of the rapid injection state of the device of the present utility model;
[0020] Figure 5 is the structural schematic diagram of the boosting injection state of the device of the present utility model;
[0021] Figure 6 is the structural schematic diagram of the injection return state of the device of the present utility model;
[0022] In the figures: 1. Injection cylinder barrel; 2. Injection cylinder piston; 3. Injection cylinder piston rod; 4. Injection cylinder flange; 5. Rear cylinder head of injection cylinder; 6. Front cylinder head of injection cylinder; 7. Quick cylinder plunger; 8. Quick cylinder head; 9. Rear oil inlet / outlet port; 10. Front oil inlet / outlet port; 12. Rod chamber; 121. Rodless chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] In order to enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances for the embodiments of the present utility model described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0026] As Figure 1 、 Figure 2 and Figure 3 As shown, a mother-and-son type injection cylinder for an extrusion casting machine, its main structure includes an injection cylinder and a fast cylinder, where the injection cylinder is used as the mother cylinder and the fast cylinder is used as the son cylinder. The injection cylinder is located outside the fast cylinder; the telescopic directions of the injection cylinder and the fast cylinder are the same.
[0027] The injection cylinder includes: an injection cylinder barrel 1, an injection cylinder piston 2, an injection cylinder piston rod 3, an injection cylinder flange 4, an injection cylinder rear cylinder head 5, and an injection cylinder front cylinder head 6.
[0028] The injection cylinder piston 2 and the injection cylinder piston rod 3 are fixedly connected; the injection cylinder piston rod 3 is provided with a central blind hole; the injection cylinder piston 2 can move back and forth in the inner hole of the injection cylinder barrel 1; the outer diameter of the injection cylinder piston rod 3 is smaller than the inner diameter of the injection cylinder barrel 1;
[0029] The rear cylinder head 5 and the front cylinder head 6 of the injection cylinder are respectively located at both ends of the injection cylinder barrel 1; the central protruding parts of the rear cylinder head 5 and the front cylinder head 6 of the injection cylinder are inserted into the inner hole of the injection cylinder barrel 1;
[0030] The injection cylinder flange 4 is an annular part, and the number is 2; the inner hole surface of the central part of the injection cylinder flange 4 is provided with threads, and is fixedly connected to the outer circular surfaces at both ends of the injection cylinder barrel 1 respectively by means of threaded connection; the two injection cylinder flanges 4 are fixedly connected to the upper surface of the rear cylinder head 5 and the lower surface of the front cylinder head 6 of the injection cylinder respectively through the flanges thereon; through the above structure, the injection cylinder barrel 1, the injection cylinder flange 4 and the rear cylinder head 5 of the injection cylinder form a fixed connection.
[0031] The front cylinder head 6 of the injection cylinder is provided with a front oil inlet and outlet 10; the number of the front oil inlet and outlet 10 is 1, which is arranged on the side of the front cylinder head 6 of the injection cylinder and communicates with the central through hole of the front cylinder head 6 of the injection cylinder;
[0032] The rear cylinder head 5 of the injection cylinder is provided with a rear oil inlet and outlet 9; the number of the rear oil inlet and outlet 9 is 2, which are symmetrically arranged on the side of the rear cylinder head 5 of the injection cylinder and communicate with the central through hole of the rear cylinder head 5 of the injection cylinder.
[0033] The fast cylinder includes: a fast cylinder plunger and a fast cylinder head;
[0034] The fast cylinder plunger 7 is provided with a central through hole; the front end of the fast cylinder plunger 7 is inserted into the central blind hole of the injection cylinder piston rod 3, and the rear end of the fast cylinder plunger 7 is fixedly connected to the rear cylinder head 5 of the injection cylinder through a flange;
[0035] In this embodiment, in order to ensure the structural strength of the hollow injection cylinder piston rod 3, the length of the injection cylinder piston rod 3 should be less than 15 times its diameter; the outer diameter of the fast cylinder plunger 7 should be less than 30% of the outer diameter of the injection cylinder piston rod 3.
[0036] As Figures 4 to 6 shown, the device of the present utility model includes three working states, namely, a fast injection state, a boosting injection state and an injection return state; in a complete injection process, the three states are switched in sequence.
[0037] Fast injection state: The hydraulic oil is only supplied to the fast cylinder. The hydraulic oil enters the fast cylinder through the central through hole of the fast cylinder plunger 7; synchronously, the rear oil inlet and outlet 9 sucks oil from the fuel tank, and the front oil inlet and outlet 10 discharges oil to the fuel tank. In the fast injection state, due to the small volume inside the fast cylinder, the fast cylinder plunger 7 can quickly move away from the injection cylinder piston rod 3, and the mother-child type injection cylinder realizes fast injection; this working state corresponds to the fast filling stage of the squeeze casting machine.
[0038] Boost injection state: The hydraulic oil is supplied to both the injection cylinder and the fast cylinder simultaneously to ensure the stable output of the total injection force at the maximum state. The hydraulic oil enters the fast cylinder through the central through-hole of the fast cylinder plunger 7, and at the same time enters the rodless cavity 121 through the rear oil inlet / outlet port 9 and discharges oil to the fuel tank through the front oil inlet / outlet port 10. In the boost injection state, the output thrust of the mother-and-son injection cylinder is the largest; this working state corresponds to the pressure-holding and solidification stage of the squeeze casting machine.
[0039] Injection return state: The piston rod 3 of the injection cylinder retracts, and the mother-and-son injection cylinder resets. The hydraulic oil enters the rod cavity 12 through the front oil inlet / outlet port 10 and discharges oil to the fuel tank through the rear oil inlet / outlet port 9 and the central through-hole of the fast cylinder plunger 7. In the injection return state, the mother-and-son injection cylinder does not output thrust; this working state corresponds to the stage when the squeeze casting machine waits for the next casting process.
[0040] A mother-and-son injection cylinder for a squeeze casting machine according to this embodiment can achieve the speed of a traditional injection cylinder without using an accumulator, and at the same time, the injection force remains unchanged during boost injection. The squeeze casting machine adopting the utility model has high structural strength, no need for accumulator time, a smaller displacement of the oil pump, and lower energy consumption.
[0041] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: Similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0042] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figures with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the attached drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding interpretations are made for the spatial relative descriptions used here.
[0043] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" etc. is usually based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary statements, these orientation words do not indicate or imply that the indicated devices or elements must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.
[0044] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A master-slave injection cylinder for a squeeze casting machine, characterized in that, Comprising: Comprising a shot cylinder and a fast cylinder, wherein the shot cylinder serves as the master cylinder and the fast cylinder serves as the slave cylinder; The shot cylinder is located outside the fast cylinder; The telescopic directions of the shot cylinder and the fast cylinder are the same; The shot cylinder comprises: a shot cylinder barrel (1), a shot cylinder piston (2), a shot cylinder piston rod (3), a shot cylinder flange (4), a shot cylinder rear cylinder head (5) and a shot cylinder front cylinder head (6); The shot cylinder piston (2) and the shot cylinder piston rod (3) are fixedly connected; the shot cylinder piston rod (3) is provided with a central blind hole; the shot cylinder piston (2) is located in the inner hole of the shot cylinder barrel (1); the outer diameter of the shot cylinder piston rod (3) is smaller than the inner diameter of the shot cylinder barrel (1); The shot cylinder rear cylinder head (5) and the shot cylinder front cylinder head (6) are respectively located at both ends of the shot cylinder barrel (1); the central protruding parts of the shot cylinder rear cylinder head (5) and the shot cylinder front cylinder head (6) are inserted into the inner hole of the shot cylinder barrel (1); The shot cylinder flange (4) is an annular part and the number is 2; the inner hole surface of the center of the shot cylinder flange (4) is provided with threads and is fixedly connected to the outer circular surfaces at both ends of the shot cylinder barrel (1) respectively by means of threaded connection; the two shot cylinder flanges (4) are fixedly connected to the upper surface of the shot cylinder rear cylinder head (5) and the lower surface of the shot cylinder front cylinder head (6) respectively through the flanges thereon; The shot cylinder front cylinder head (6) is provided with a front oil inlet / outlet port (10); the number of the front oil inlet / outlet ports (10) is 1, which is arranged on the side surface of the shot cylinder front cylinder head (6) and is communicated with the central through hole of the shot cylinder front cylinder head (6); The shot cylinder rear cylinder head (5) is provided with rear oil inlet / outlet ports (9); the number of the rear oil inlet / outlet ports (9) is 2, which are symmetrically arranged on the side surface of the shot cylinder rear cylinder head (5) and are communicated with the central through hole of the shot cylinder rear cylinder head (5).
2. The master-slave type shot cylinder for an extrusion casting machine according to claim 1, wherein The fast cylinder comprises: a fast cylinder plunger (7) and a fast cylinder head (8); The fast cylinder plunger (7) is provided with a central through hole; the front end of the fast cylinder plunger (7) is inserted into the central blind hole of the shot cylinder piston rod (3), and the rear end of the fast cylinder plunger (7) is fixedly connected to the shot cylinder rear cylinder head (5) through a flange.
3. The master-slave type shot cylinder for an extrusion casting machine according to claim 2, wherein The length of the shot cylinder piston rod (3) is less than 15 times its diameter; the outer diameter of the fast cylinder plunger (7) is less than 30% of the outer diameter of the shot cylinder piston rod (3).