Device for measuring liquid lifting time and mold filling time in low-pressure mold

Abstract

The utility model relates to the technical field of casting equipment, in particular to a device for measuring liquid lifting time and mold filling time in a low-pressure mold. The device comprises a base, a mold and a holding furnace, two groups of riser tubes communicated with the mold are arranged in the heat preserving furnace; two groups of first measuring devices are also arranged on the base; two groups of second measuring devices are arranged on the mounting plate; one end of the first measuring device is inserted into the lower die and located at the pipe opening of the liquid rising pipe, and when the molten aluminum rises to the pipe opening in the liquid rising pipe, the time recorded by the first measuring device is the liquid rising time; one end of the second measuring device is inserted into the upper mold and located at the highest point of the upper mold cavity, and when the molten aluminum continuously rises to the highest point of the mold cavity, the time recorded by the second measuring device is the sum of the liquid rising time and the mold filling time. According to the utility model, the liquid lifting time and the mold filling time of low-pressure pouring can be accurately measured, and an actual basis is provided for correctly setting the liquid lifting time and the mold filling time on low-pressure equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of casting equipment, in particular to a device for measuring liquid rising time and mold filling time in a low-pressure mold. Background Art

[0002] Low-pressure casting refers to a casting method in which the mold is generally placed above a sealed crucible, and compressed air is passed into the crucible to create a low pressure (0.06-0.15MPa) on the surface of the molten metal, causing the molten metal to rise from the riser to fill the mold and control solidification.

[0003] Currently, the liquid raising and filling times set on low-pressure equipment are primarily based on theoretical calculations; it's difficult to determine whether these times correspond to actual times. Furthermore, improper timing during the liquid raising and filling processes can easily lead to defects such as air entrainment and insufficient pouring, resulting in increased casting scrap rates. Utility Model Content

[0004] The purpose of the utility model is to address the problems existing in the background technology and propose a device for measuring the liquid rising time and filling time in a low-pressure mold. The liquid rising time and filling time are measured by a first measuring device and a second measuring device. The liquid rising time and filling time of low-pressure casting can be accurately measured, providing a practical basis for correctly setting the liquid rising time and filling time on low-pressure equipment.

[0005] The technical solution of the utility model is a device for measuring the liquid rising time and filling time in a low-pressure mold, comprising a base, a mold arranged on the base, and a heat preservation furnace arranged under the base;

[0006] Two sets of liquid riser pipes connected to the mold are provided in the holding furnace;

[0007] The mold includes an upper mold, a lower mold and a mounting plate arranged on the top of the upper mold;

[0008] Two sets of first measuring devices are also provided on the base; two sets of second measuring devices are provided on the mounting plate; one end of the first measuring device is inserted into the lower mold and located at the nozzle of the riser tube. When the aluminum liquid rises in the riser tube and reaches the nozzle, the time recorded by the first measuring device is the rise time;

[0009] One end of the second measuring device is inserted into the upper mold and located at the highest point of the upper mold cavity. When the aluminum liquid continues to rise and reaches the highest point of the cavity, the time recorded by the second measuring device is the sum of the liquid rising time and the filling time.

[0010] Furthermore, when castings are cast using low-pressure casting equipment, the height to which the molten aluminum rises in the riser is controlled by introducing gas into the holding furnace.

[0011] Preferably, a time relay is integrated on the low-pressure casting equipment. When a start switch on the low-pressure casting equipment is pressed, the time relay starts timing and controls the rise of the aluminum liquid.

[0012] Furthermore, the first measuring device includes an indicator light, a wire, a power supply, and electrodes;

[0013] The electrode includes a first pole and a second pole; starting from the first pole of the electrode, the power supply and the indicator light are connected in series to the second pole through wires to form a loop; the first pole and the second pole of the electrode both extend into the mold; the first pole and the second pole of the electrode are in an open circuit state, and remain in a conductive state when in contact with the aluminum liquid.

[0014] Preferably, the indicator light is on when the electrodes are conductive.

[0015] Preferably, the power supply is a 12V independent low-voltage power supply.

[0016] Preferably, the electrodes are ceramic electrodes.

[0017] Preferably, the second measuring device has the same structure as the first measuring device.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] The utility model can accurately measure the liquid rising time and the filling time of low-pressure pouring, and provides a practical basis for correctly setting the liquid rising time and the filling time on the low-pressure equipment; on this basis, it can accurately grasp when the mold cavity should be pressurized, and avoid problems such as air entrainment and insufficient pouring of the casting caused by pressurizing the mold cavity before the mold cavity is full; in addition, the liquid filling speed can be accurately calculated, which is convenient for judging whether the filling speed is reasonable; the filling speed can be reversely corrected to avoid the scrapping of castings due to unreasonable process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the installation position structure of the liquid riser in the embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the installation position structure of the second measuring device in an embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of the structure of the measuring device in the embodiment of the present utility model.

[0024] Figure numerals: 1. base; 2. holding furnace; 3. first measuring device; 31. indicator light; 32. wire; 33. power supply; 34. electrode; 4. mounting plate; 5. second measuring device; 6. lower mold; 7. upper mold; 8. liquid rising pipe. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 1-2 As shown, the present invention proposes a device for measuring the liquid rising time and the filling time in a low-pressure mold, comprising a base 1, a mold arranged on the base 1, and a heat preservation furnace 2 arranged under the base 1;

[0027] Two sets of riser pipes 8 connected to the mold are provided in the holding furnace 2. When casting using low-pressure casting equipment, the height to which the molten aluminum rises in the riser pipes 8 is controlled by introducing gas into the holding furnace 2. A time relay is integrated in the low-pressure casting equipment. When the start switch on the low-pressure casting equipment is pressed, the time relay starts timing and controls the rise of the molten aluminum.

[0028] In this embodiment, the mold includes an upper mold 7, a lower mold 6, and a mounting plate 4 arranged on the top of the upper mold 7;

[0029] Two sets of first measuring devices 3 are also provided on the base 1; two sets of second measuring devices 5 are provided on the mounting plate 4, wherein the second measuring devices 5 have the same structure as the first measuring devices 3; the first measuring devices 3 include an indicator light 31, a wire 32, a power supply 33, and an electrode 34;

[0030] Among them, the electrode 34 includes a first pole and a second pole; starting from the first pole of the electrode 34, the power supply 33 and the indicator light 31 are connected in series to the second pole through the wire 32 to form a loop; the first pole and the second pole of the electrode 34 both extend into the interior of the mold; the first pole and the second pole of the electrode 34 are in an open circuit state, and remain in a conductive state when they come into contact with the aluminum liquid.

[0031] During actual use, when the start switch on the low-pressure casting equipment is pressed, the time relay starts timing, one end of the first measuring device 3 is inserted into the lower mold 6 and is located at the nozzle of the liquid rising tube 8; one end of the second measuring device 5 is inserted into the upper mold 7 and is located at the highest point of the cavity of the upper mold 7; as the aluminum liquid in the liquid rising tube 8 gradually rises, when the height of the aluminum liquid reaches the nozzle of the liquid rising tube 8, the electrode 34 of the first measuring device 3 is turned on, and the indicator light 31 is on. At this time, the time recorded on the time relay is the liquid rising time.

[0032] As the height of the aluminum liquid continues to rise, when it reaches the highest point of the cavity of the upper mold 7, the electrode 34 of the second measuring device 5 is turned on, and the indicator light 31 lights up. At this time, the time recorded on the time relay is the sum of the liquid rising time and the filling time; the filling time data can be obtained by calculation.

[0033] In the present invention, the indicator light 31 can be set to different colors, such as red, yellow, or green, as needed. The indicator light 31 on the second measuring device 5 can be set to a different color than the indicator light 31 on the first measuring device 3 for easy differentiation. Preferably, in this embodiment, the power supply 33 is a 12V independent low-voltage power supply, and the electrodes 34 are high-temperature-resistant ceramic electrodes.

[0034] The utility model can accurately measure the liquid rising time and the mold filling time of low-pressure pouring, and provides a practical basis for correctly setting the liquid rising time and the mold filling time on low-pressure equipment.

[0035] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A device for measuring the liquid rising time and filling time in a low-pressure mold, characterized in that: It comprises a base (1), a mold arranged on the base (1), and a heat preservation furnace (2) arranged under the base (1); Two groups of liquid riser pipes (8) connected to the mold are provided in the heat preservation furnace (2); The mold comprises an upper mold (7), a lower mold (6), and a mounting plate (4) arranged on the top of the upper mold (7); Two sets of first measuring devices (3) are also provided on the base (1); two sets of second measuring devices (5) are provided on the mounting plate (4); one end of the first measuring device (3) is inserted into the lower mold (6) and is located at the nozzle of the liquid riser (8); when the aluminum liquid rises in the liquid riser (8) and reaches the nozzle, the time recorded by the first measuring device (3) is the liquid rise time; One end of the second measuring device (5) is inserted into the upper mold (7) and is located at the highest point of the mold cavity of the upper mold (7). When the aluminum liquid continues to rise and reaches the highest point of the mold cavity, the time recorded by the second measuring device (5) is the sum of the liquid rising time and the mold filling time.

2. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 1, characterized in that: When castings are cast using low-pressure casting equipment, the height to which the aluminum liquid rises in the riser (8) is controlled by introducing gas into the holding furnace (2).

3. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 2, characterized in that: The low-pressure casting equipment is integrated with a time relay. When the start switch on the low-pressure casting equipment is pressed, the time relay starts timing and controls the rise of the aluminum liquid.

4. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 1, characterized in that: The first measuring device (3) includes an indicator light (31), a lead (32), a power supply (33) and an electrode (34); The electrode (34) includes a first pole and a second pole; starting from the first pole of the electrode (34), a power supply (33) and an indicator light (31) are sequentially connected in series to the second pole through a wire (32) to form a loop; the first pole and the second pole of the electrode (34) both extend into the interior of the mold; the first pole and the second pole of the electrode (34) are in an open circuit state, and remain in a conducting state when in contact with aluminum liquid.

5. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 4, characterized in that: When the electrode (34) is conductive, the indicator light (31) lights up.

6. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 4, characterized in that: The power supply (33) is a 12V independent low voltage power supply.

7. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 4, characterized in that: The electrode (34) is a ceramic electrode.

8. The device for measuring the liquid rising time and filling time in a low-pressure mold according to claim 1, characterized in that: The second measuring device (5) has the same structure as the first measuring device (3).

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