Heat preservation charging barrel oil sleeve for squeeze casting machine

Abstract

The utility model relates to a heat preservation charging barrel oil sleeve for an extrusion casting machine. The heat preservation charging barrel oil sleeve comprises a structure module and a liquid path module. The structure module comprises an oil sleeve body, an upper sealing plate, a lower sealing plate, an oil hole, an oil groove, an oil inlet and an oil outlet, and a continuous channel is formed in the pipe wall of the oil sleeve body under the surrounding of the oil sleeve body, the upper sealing plate and the lower sealing plate; the oil inlet and the oil outlet are connected with the two ends of the continuous channel respectively. The liquid path module is located outside the oil jacket body, has a double-pump switching function and can switch two flow states. The liquid path module comprises a pump A, a pump B, an oil tank and an electromagnetic unloading overflow valve group; and the pump A and the pump B are connected with the same motor and are driven by the same motor to drive high-temperature oil to circularly flow in the pipe wall of the oil jacket body. According to the utility model, the temperature fluctuation of molten aluminum in the charging barrel caused by natural cooling in the continuous casting process can be relieved, the probability of defects such as shrinkage cavities, shrinkage porosity and cold shut of castings is reduced, and the quality consistency of extrusion casting products is improved.

Description

Technical Field

[0001] The utility model relates to the field of casting equipment, and particularly relates to a heat preservation barrel oil sleeve for an extrusion casting machine. Background Art

[0002] In the modern metal processing industry, the extrusion casting technology is widely used due to its advantages of high efficiency, high precision, and the ability to produce parts with complex shapes. Among them, aluminum alloy, as a lightweight and high-strength metal material, occupies an important position in the fields of aerospace, automotive manufacturing, electronic communication, etc. However, during the extrusion casting process of aluminum alloy parts, especially at the stage of pouring molten aluminum into the barrel, the heat exchange between the barrel and the high-temperature molten aluminum causes the temperature of the molten aluminum to fluctuate violently. The actual temperature of the molten aluminum poured into the cavity is often lower than the process preset temperature and it is difficult to compensate correctly, resulting in defects such as shrinkage cavities, shrinkage porosity, and cold shuts in the castings, seriously affecting the quality consistency of die-cast products.

[0003] The traditional barrel uses the method of wrapping heat preservation materials to alleviate the above problems. However, the heat preservation and insulation effect of the heat preservation materials is limited during the long-term continuous casting process, and they need to be replaced regularly; the method of electric heating and heat preservation requires a large amount of electric energy consumption, and local overheating and deformation of the barrel may occur during long-term use, which will also affect the product quality. Therefore, it is urgent to design an oil sleeve system that can stably and uniformly maintain the temperature of the barrel. This system is of great significance for improving the quality of extrusion casting products and reducing production costs.

[0004] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the inventive concept of the present utility model, and therefore, it may include information that does not constitute the prior art. Summary of the Utility Model

[0005] The utility model provides a heat preservation barrel oil sleeve for an extrusion casting machine, which includes a structural module and a liquid circuit module. The structural module includes an oil sleeve body, an upper sealing plate, a lower sealing plate, an oil hole, an oil groove, an oil inlet, and an oil outlet; the liquid circuit module includes: pump A, pump B, an oil tank, and an electromagnetic unloading and overflow valve group. Under the enclosure of the oil sleeve body, the upper sealing plate, and the lower sealing plate, a continuous channel is formed inside the tube wall of the oil sleeve body; the oil inlet and the oil outlet are respectively connected to both ends of the continuous channel. The liquid circuit module is located outside the oil sleeve body and has a dual-pump flow switching function, which can switch between two flow states, circulate high-temperature oil in the tube wall of the oil sleeve body, and play the role of stably and uniformly maintaining the temperature of the oil sleeve and the barrel, significantly alleviating the temperature fluctuation of the molten aluminum in the barrel caused by natural cooling during the mold opening process.

[0006] The specific technical solution adopted by the utility model is as follows:

[0007] It includes a structural module and a liquid circuit module;

[0008] and a tube connecting the dischar e side of the oil drain plug, wherein the inner wall of the oil drain plug is connected to the oil drain plug, and the oil drain plug is connected with the oil drain plug in a circular motion.

[0009] The fluid circuit module is located outside the oil jacket body but is connected to it. The module includes: pump A, pump B, a fuel tank, and an electromagnetic unloading relief valve assembly. Pumps A and B are connected to and driven by the same motor. The electromagnetic unloading relief valve assembly includes a two-position, two-way solenoid valve and a pilot-operated relief valve. The module has four working oil ports: port 1, port 2, port 3, and port 4. Port 1 connects sequentially to pump B and the fuel tank; port 2 connects sequentially to pump A and the fuel tank; port 3 connects only to the oil inlet; port 4 connects to the fuel tank; and the fuel tank also connects to the oil outlet.

[0010] When the continuous squeeze casting process begins, the insulated barrel oil jacket of this novel application begins operating simultaneously. The hydraulic module drives the high-temperature oil, which is kept at a relatively constant temperature, to continuously circulate within the tubing of the oil jacket. Initially, the hydraulic module operates at a high flow rate, maximizing the oil flow rate. During the stabilization phase, the module switches to a low flow rate, minimizing energy consumption and mitigating temperature fluctuations in the molten aluminum.

[0011] Compared with the prior art, the present invention has significant advantages and beneficial effects, which are specifically reflected in the following aspects:

[0012] The inner wall of the insulation barrel oil casing is provided with continuous channels that are evenly arranged and run through from top to bottom. This has the effect of maintaining the temperature of the oil casing and barrel stably and evenly, significantly alleviating the temperature fluctuation of the aluminum liquid in the barrel caused by natural cooling during the mold opening process, which is beneficial to improving the quality of the die-casting products.

[0013] The continuous channel inside the oil casing wall is formed by enclosing the oil casing body, the upper sealing plate, and the lower sealing plate. Therefore, the oil holes and oil grooves on the oil casing body are both open structures. Such a structural design reduces the manufacturing cost and improves the convenience of installation and maintenance.

[0014] Compared with the traditional oil casing without holes and oil grooves, the utility model avoids the problem of uneven heating of the barrel, increases the contact area between the high-temperature oil and the oil casing body, helps to make full use of heat, and improves the energy utilization efficiency.

[0015] (4)The liquid circuit module with the function of switching the flow rate of two pumps reduces the energy consumption of the hydraulic system and further saves electric energy. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the utility model;

[0017] Figure 2 It is a schematic structural diagram of the oil casing body of the utility model;

[0018] Figure 3 It is a schematic diagram of the working principle of the large-flow state of the liquid circuit module of the utility model;

[0019] Figure 4 It is a schematic diagram of the working principle of the small-flow state of the liquid circuit module of the utility model.

[0020] In the figure: 1, barrel; 2, oil casing body; 3, upper sealing plate; 4, lower sealing plate; 5, oil inlet; 6, oil outlet; 7, oil hole; 8, oil groove; 10, high-temperature oil pressure gauge B; 11, high-temperature oil pressure gauge A; 12, pump A; 13, pump B; 14, oil tank; 15, two-position two-way solenoid valve; 16, pilot-operated relief valve; 17, check valve; 18, electromagnetic unloading relief valve group; 19, relief valve. Detailed Description of the Preferred Embodiments

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0022] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so as to describe the embodiments of the present utility model 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 limit 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.

[0023] 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.

[0024] Figure 1 and Figure 2 is a schematic structural diagram of the device of the present utility model;

[0025] A heat-insulating barrel oil jacket for an extrusion casting machine, comprising a structural module and a liquid circuit module;

[0026] The structural module includes: an oil jacket body 2, an upper sealing plate 3, a lower sealing plate 4, an oil inlet 5, an oil outlet 6, oil holes 7 and an oil groove 8;

[0027] The oil jacket body 2 is a tubular part, and the central hole of the oil jacket body 2 is nested and assembled with the barrel 1. There are a plurality of axial holes inside the tube wall of the oil jacket body 2;

[0028] The side wall thickness of the oil jacket body 2 is one-fourth of the outer diameter of the barrel 1, and it is made of high-strength alloy steel, and the temperature range it can withstand is 300 - 500 °C;

[0029] The diameter of the oil groove 8 is one-half of the side wall thickness of the oil jacket body 2.

[0030] The axial holes include two types: oil grooves 8 and oil holes 7; among them, the oil grooves 8 are through holes arranged axially, and the oil holes 7 are blind holes arranged axially; the oil holes 7 are located at both ends of the oil groove 8 and the two are connected;

[0031] The oil grooves 8 and oil holes 7 are circumferentially and uniformly distributed inside the tube wall of the oil jacket body 2;

[0032] The outer diameter of the lower sealing plate 4 is larger than that of the oil sleeve body 2 and has an installation flange surface.

[0033] In this embodiment, the number of oil grooves 8 is 16, and the number of oil holes 7 is 15; these oil grooves 8 and oil holes 7 are connected end to end. Under the enclosure of the oil sleeve body 2, the upper sealing plate 3 and the lower sealing plate 4, a continuous channel is formed inside the pipe wall of the oil sleeve body 2; the oil holes 7 are located at the corner positions of the continuous channel;

[0034] The upper sealing plate 3 and the lower sealing plate 4 are respectively located at both ends of the oil sleeve body 2 and are in close contact with the two side end faces of the oil sleeve body 2, covering and sealing the openings of the respective oil holes 7;

[0035] The oil inlet 5 and the oil outlet 6 are respectively connected to both ends of the continuous channel.

[0036] The liquid circuit module includes: pump A12, pump B13, oil tank 14 and electromagnetic unloading overflow valve group 18; the electromagnetic unloading overflow valve group 18 includes a two-position two-way solenoid valve 15 and a pilot-operated overflow valve 16; pump A12 and pump B13 are connected to the same motor and driven by the latter;

[0037] The liquid circuit module drives the high-temperature oil to circulate inside the pipe wall of the oil sleeve body 2, achieving the effect of evenly maintaining the temperatures of the oil sleeve and the barrel, and significantly alleviating the temperature fluctuation of the molten aluminum in the barrel caused by natural cooling during the mold opening process. Specifically, the liquid circuit module pumps out the high-temperature oil from the oil tank 14, which enters the oil sleeve body 2 from the oil inlet 5, flows through a continuous channel formed by a combination of multiple oil holes 7 and oil grooves 8, flows out from the oil outlet 6, and finally returns to the oil tank 14.

[0038] At the outlets of pump A12 and pump B13, a high-temperature oil pressure gauge A11 and a high-temperature oil pressure gauge B10 are respectively connected in parallel for visually observing the output pressures of pump A12 and pump B13 manually.

[0039] The liquid circuit module has four working oil ports, namely working oil port one, working oil port two, working oil port three and working oil port four;

[0040] Working oil port one is successively communicated with pump B13 and oil tank 14;

[0041] Working oil port two is successively communicated with pump A12 and oil tank 14;

[0042] Working oil port three ( Figure 3 the P port therein) is only communicated with the oil inlet 5;

[0043] Working oil port four ( Figure 3 the T port therein) is communicated with oil tank 14; oil tank 14 is also communicated with the oil outlet 6.

[0044] The pumps A12 and B13 are flow pumps with the same flow rate and operating conditions; the liquid circuit module includes two flow states: a large flow working state and a small flow working state:

[0045] First, when in the large flow working state;

[0046] Pumps A12 and B13 merge and pump high-temperature oil simultaneously.

[0047] Second, when in the small flow working state;

[0048] Pump A12 is unloaded, and pump B13 pumps high-temperature oil alone.

[0049] When continuous squeeze casting processing starts, the insulating barrel oil jacket of this embodiment starts to work synchronously, and the liquid circuit module drives high-temperature oil with a basically constant temperature to continuously circulate and flow inside the pipe wall of the oil jacket body 2. In the initial stage, the liquid circuit module is in the large flow working state to increase the oil flow velocity and flow rate as much as possible. In the stable stage, the liquid circuit module switches to the small flow working state to achieve the effect of alleviating the temperature fluctuation of the molten aluminum with the smallest possible energy consumption.

[0050] It should be noted that the switching action between the two working conditions is performed by the two-way two-position solenoid valve 15.

[0051] When the spool of the two-way two-position solenoid valve 15 is located at the far right ( Figure 3 middle state), the lower end (pressure regulating end) of the pilot-operated relief valve 16 is disconnected from the oil circuit channel of the oil tank 14. Due to the incompressibility of the liquid, the spool of the pilot-operated relief valve 16 is locked, and the hydraulic oil in the oil circuit cannot reach the oil tank 14 through the pilot-operated relief valve 16. Therefore, the oil transmitted by pump A12 merges with the oil pumped by pump B13 through the check valve 17, and both supply oil to the inlet port 5 simultaneously, and the liquid circuit module realizes the large flow working state.

[0052] When the spool of the two-way two-position solenoid valve 15 is located at the far left ( Figure 4 middle state), the lower end (pressure regulating end) of the pilot-operated relief valve 16 is connected to the oil circuit channel of the oil tank 14. At this time, the pressure at the lower end of the pilot-operated relief valve 16 is the atmospheric pressure, and the spool moves downward under the pressure of the oil transmitted by pumps A12 and B13. The hydraulic oil of pump B13 directly reaches the oil tank 14 through the pilot-operated relief valve 16, and the liquid circuit module realizes the small flow working state.

[0053] It should be noted that although Figure 3 and Figure 4 there are multiple oil tanks 14 in the schematic diagram of the hydraulic control principle, only one oil tank 14 is required in the actual hydraulic control system; Figure 3 The multiple oil tanks 14 in

[0054] The overflow valve 19 controls the oil supply pressure of pump A 12 and pump B 13, and it is set according to the maximum working pressure required by the system; the overflow valve 19 is a direct-acting overflow valve for restricting the system pressure; when the overflow valve 19 is conducting, there is no pressure at the oil inlet 5 and the oil supply stops;

[0055] The electromagnetic unloading overflow valve group 18 is composed of a two-position two-way solenoid valve 15, a pilot-operated overflow valve 16 and a check valve 17. Its set pressure is lower than that of the overflow valve 19, but higher than the minimum working pressure required by the hydraulic system. The working voltage of the electromagnetic unloading overflow valve group 18 is DC24V;

[0056] The outside of the two-position two-way solenoid valve 15 is provided with a heat insulation and heat preservation sleeve so that it can withstand a temperature of 500 - 1000 °C to prevent it from being damaged due to excessive oil temperature during operation.

[0057] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake 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 like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0058] For the sake of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial positional relationship between one device or feature and other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0059] 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 drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to 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.

[0060] 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, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, 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 heat preservation barrel oil sleeve for an extrusion casting machine, characterized in that: It includes a structure module and a liquid circuit module; The structure module includes an oil sleeve body (2), an upper sealing plate (3), a lower sealing plate (4), an oil hole (7) and an oil groove (8); The oil sleeve body (2) is a tubular part, and the central hole of the oil sleeve body (2) is nested and assembled with the barrel (1). There are multiple axial holes inside the tube wall of the oil sleeve body (2); The axial holes include two types: oil grooves (8) and oil holes (7); among them, the oil grooves (8) are through holes arranged axially, and the oil holes (7) are blind holes arranged axially; the oil holes (7) are located at both ends of the oil groove (8) and are connected to each other; The number of both the oil grooves (8) and the oil holes (7) is greater than 1, and multiple oil grooves (8) and oil holes (7) are circumferentially and evenly distributed inside the tube wall of the oil sleeve body (2); The upper sealing plate (3) and the lower sealing plate (4) are respectively located at both ends of the oil sleeve body (2), and are closely attached to the two side end faces of the oil sleeve body (2), covering and sealing the openings of the oil holes (7); The liquid circuit module is located outside the oil sleeve body (2), but forms a connection relationship with the oil sleeve body (2).

2. The heat preservation barrel oil sleeve for an extrusion casting machine according to claim 1, characterized in that: The oil grooves (8) and the oil holes (7) are connected end to end. Under the enclosure of the oil sleeve body (2), the upper sealing plate (3) and the lower sealing plate (4), a continuous channel is formed inside the tube wall of the oil sleeve body (2); the oil holes (7) are located at the corner positions of the continuous channel; The structure module further includes an oil inlet (5) and an oil outlet (6), and the two are respectively connected to both ends of the continuous channel.

3. The heat preservation barrel oil sleeve for an extrusion casting machine according to claim 1, characterized in that: The side wall thickness of the oil sleeve body (2) is one-fourth of the outer diameter of the barrel (1), and it is made of high-strength alloy steel; The diameter of the oil groove (8) is one-half of the side wall thickness of the oil sleeve body (2).

4. The heat preservation barrel oil sleeve for an extrusion casting machine according to claim 1, characterized in that: The outer diameter of the lower sealing plate (4) is greater than the outer diameter of the oil sleeve body (2), and it has a mounting flange surface.

5. The heat preservation barrel oil sleeve for an extrusion casting machine according to claim 2, characterized in that: The liquid circuit module includes: pump A (12), pump B (13), oil tank (14) and electromagnetic unloading overflow valve group (18); The electromagnetic unloading overflow valve group (18) includes a two-position two-way solenoid valve (15) and a pilot-operated overflow valve (16); The liquid circuit module has four working oil ports, namely working oil port one, working oil port two, working oil port three and working oil port four; The working oil port one is sequentially connected to pump B (13) and oil tank (14); the working oil port two is sequentially connected to pump A (12) and oil tank (14); the working oil port three is only connected to the oil inlet (5); the working oil port four is connected to the oil tank (14); the oil tank (14) is connected to the oil outlet (6).

6. The heat preservation barrel oil sleeve for an extrusion casting machine according to claim 5, characterized in that: The pump A (12) and the pump B (13) are connected to the same motor and driven by the latter.

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