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CN-115519095-B - Die casting machine ration soup feeding device that flow is stable and easy to maintain

CN115519095BCN 115519095 BCN115519095 BCN 115519095BCN-115519095-B

Abstract

The invention discloses a quantitative soup feeding device of a die casting machine, which is stable in flow and easy to maintain, and comprises a slurry tank, a valve core module, an air cylinder, a connecting shaft, a plunger rod and a probe module, wherein the valve core module comprises a guide pipe, a small end cover and a large end cover, the guide pipe is assembled in the large end cover, the small end cover and the guide pipe form a whole body which can move in the vertical direction in a central through hole of the large end cover, through holes A and B are respectively formed in the side surfaces of the guide pipe and the large end cover, when the valve core module extends out of the bottom surface of the large end cover, molten metal sequentially enters the slurry tank through a valve port, the through holes A and B at the bottom of the guide pipe, and when the valve core module retracts from the bottom surface of the large end cover, the molten metal is stored in the slurry tank in a sealing manner. The invention can realize quantitative and stable soup feeding, and the recovery from power failure is faster, and the molten metal valve port has an anti-collision structure, so that high-temperature molten metal in the device can not leak even if the device collides with a die casting machine or the ground severely in the working process of the soup feeding device, and the use is safer.

Inventors

  • WAN SHUIPING
  • JIA XIANGLEI
  • ZHAO FENG
  • ZHANG JIN
  • LI FA

Assignees

  • 苏州三基铸造装备股份有限公司

Dates

Publication Date
20260505
Application Date
20221011

Claims (10)

  1. 1. The quantitative soup feeding device of the die casting machine is characterized by comprising a slurry tank (1), a valve core module (2), a cylinder (3), a connecting shaft (6), a plunger rod (7) and a probe module, wherein the flow is stable and the die casting machine is easy to maintain; the valve core module (2) comprises a guide pipe (21), a small end cover (22) and a large end cover (23), wherein the guide pipe (21) and the large end cover (23) are hollow tubular parts, the bottom end surface of the large end cover (23) extends out of a flange surface, the guide pipe (21) is assembled inside the large end cover (23) and the center lines of the guide pipe and the large end cover coincide, the small end cover (22) is fixedly connected with the upper end of the guide pipe (21), the whole formed by the small end cover (22) and the guide pipe can move in the vertical direction in a central through hole of the large end cover (23), through holes A (25) are distributed on the circumferential surface of the guide pipe (21), and through holes B (26) are distributed on the side surface of the large end cover (23); The valve core module (2) is driven by the air cylinder (3) to move up or down in the vertical direction, when the valve core module (2) moves to the bottom dead center position of the valve core module, the valve core module (2) stretches out from the bottom surface of the large end cover (23) and sequentially passes through a valve port (27), a through hole A (25) and a through hole B (26) to enter the slurry tank (1), when the valve core module (2) moves to the top dead center position of the valve core module, the valve core module (2) retracts from the bottom surface of the large end cover (23), the through hole A (25) is not communicated with the through hole B (26), and the metal liquid is stored in the slurry tank (1) in a closed mode; The slurry tank (1) comprises an upper sleeve (11) and a lower sleeve (12) which are fixedly connected, wherein a connecting plate (13) is fixedly connected to the outer side surface of the upper sleeve (11), a probe module is vertically arranged on one side of the connecting plate (13), and the other side of the connecting plate (13) is fixedly connected with a carrying device; the bottom end face of the large end cover (23) is connected with the lower end face of the lower sleeve (12) through a flange.
  2. 2. The quantitative soup feeding device of the die casting machine with stable flow and easy maintenance according to claim 1 is characterized in that the number of the through holes A (25) is more than or equal to one, if a plurality of through holes A (25) are uniformly distributed on the circumferential surface of the side wall of the guide pipe (21), the number of the through holes B (26) is more than or equal to one, and if a plurality of through holes B (26) are uniformly distributed on the circumferential surface of the side wall of the large end cover (23); The small end cover (22) is connected with the plunger rod (7) through a countersunk bolt, the exposed part of the head of the bolt is covered with heat-insulating fireproof material, and a positioning pin (28) is arranged between the small end cover (22) and the plunger rod (7) to prevent relative rotation of the small end cover and the plunger rod.
  3. 3. The quantitative soup feeding device of the die casting machine with stable flow and easy maintenance according to claim 1 is characterized in that a through hole B (26) is a transverse kidney-shaped hole or an oval hole, an included angle a is formed between the axis of a through hole A (25) and a horizontal line, the included angle a is 30-75 degrees, the small end cover (22) is connected with a plunger rod (7) only through a countersunk bolt, an exposed part of the head of the bolt is covered with a heat-insulating fireproof material, the heat-insulating fireproof material is a ceramic fiber plate, and if the through hole B (26) is a kidney-shaped hole, the length of the hole is 2-5 times the width.
  4. 4. The quantitative soup feeding device of the die casting machine, which is stable in flow and easy to maintain, is characterized in that an air passage block (14) is arranged on the upper portion of the upper sleeve (11) in a penetrating mode, the air passage block is of a hollow structure with two air passages inside, an argon inlet pipe (15) is arranged on a horizontal air passage of the air passage block (14), and argon sequentially passes through a vertical air passage of the air passage block (14), the upper sleeve (11) and the lower sleeve (12) to reach the upper portion of molten metal in the soup feeding device, so that oxidation of the molten metal is prevented.
  5. 5. The device for dosing soup of a die casting machine with stable flow and easy maintenance according to claim 1, wherein the probe module is a thermocouple type sensor or an electrode type liquid level sensor.
  6. 6. The flow-stable and easy-to-maintain die casting machine dosing device according to claim 5, wherein if the probe module is a thermocouple sensor, the probe module comprises a probe A (8) and a probe B (9), the probe A (8) is positioned above the probe B (9), and the lower bottom surface of the probe B (9) is flush with the bottom surface of the large end cover (23).
  7. 7. The quantitative soup feeding device of the die casting machine with stable flow and easy maintenance according to claim 5, wherein if the type of the probe module is an electrode type liquid level sensor, the probe module comprises a first probe (61), a second probe (62) and a third probe (63), the third probe (63) is positioned above the first probe (61) and the second probe (62), and the lower bottom surfaces of the first probe (61) and the second probe (62) are flush with the bottom surface of the large end cover (23); the upper end of the first probe (61) is connected with an alternating current power supply; The upper end of the second probe (62) is connected with a relay A (50), a normally closed switch (54), a resistor A (52) and a ground end; The upper end of the probe III (63) is connected with a relay B (51), a resistor B (53) and a ground end; The relay B (51) is electrically connected with the normally closed switch (54), and when the relay B (51) is electrified, the normally closed switch (54) is switched to an on state.
  8. 8. The flow-stable and easy-to-maintain die casting machine dosing device according to claim 1, characterized in that the height of the large end cap (23) is greater than the height of the conduit (21).
  9. 9. A method for quickly recovering a soup feeding device after power failure by adopting the device disclosed in claim 1 is characterized in that when a production line is subjected to long-time unexpected power failure, metal liquid in the soup feeding device is cooled and solidified, after the power supply of the production line is recovered, the valve core module (2) is integrally detached from a plunger rod (7), and then the soup feeding device is immersed below the metal liquid level in a heat preservation furnace (30), and solid metal solidified in the soup feeding device is quickly melted.
  10. 10. A method for preventing leakage of soup feeding device by using the device of claim 1 is characterized in that the valve core module (2) is impacted, the valve core module (2) is pushed into the large end cover (23) due to impact force, the impact force can cause abnormal rising of air pressure value in a control air path of an air cylinder, an air pressure sensor in the air path can capture the abnormal air pressure value to send out an alarm of collision of the soup feeding device to a die casting machine, then an upstream die casting machine sends out an instruction to an electromagnetic valve for controlling the movement of the air cylinder (3), so that the air cylinder (3) is kept in a retracted state, the valve core module (2) is kept in a retracted state, and further leakage of molten metal is avoided.

Description

Die casting machine ration soup feeding device that flow is stable and easy to maintain Technical Field The invention relates to the technical field of pressure casting equipment, in particular to a quantitative soup feeding device of a die casting machine, which has stable flow and is easy to maintain. Background The die casting machine is a casting machine for obtaining solid metal castings by hydraulically injecting a certain volume of metal alloy into a metal die under the action of pressure and cooling and forming. The soup feeding device is an important peripheral device of the die casting equipment. The traditional soup feeding device comprises a soup ladle, a connecting rod mechanism and a chain transmission mechanism, and the working process is that the connecting rod mechanism drives the soup ladle to a specified position, then the chain transmission mechanism rotates the soup ladle, alloy liquid is scooped up from the surface of the alloy liquid, the soup ladle is turned right out of a molten pool, then the soup ladle is further moved to the position above a feed inlet of a die casting machine, and the soup ladle is controlled to be laterally rotated to pour the alloy liquid into the die casting machine. The method is similar to scooping soup and pouring soup with a spoon in life, and is a mode of 'feeding materials' and 'feeding and pouring materials'. In the process of taking materials, the ladle can stir the alloy liquid level to accelerate the oxidation of the alloy liquid due to the side rotation and the correction, meanwhile, the oxidizing slag on the surface of the alloy liquid can be scooped into the ladle together with the alloy liquid, and the method is difficult to accurately control the amount of the alloy liquid to be formed in the ladle. In the process that the soup ladle moves to the die casting machine, the open surface of the soup ladle alloy liquid is further oxidized, and finally the alloy liquid enters the die casting machine with the oxidizing slag to form a die casting, so that the quality of the die casting cannot be guaranteed. In recent years, soup feeding modes of 'lower soup stock' and 'lower soup stock' have been developed. As disclosed in chinese patent CN 102935499A, a soup cup for a soup feeder matched with a die casting machine is provided with a material opening at the lower part of the cup body, and the material opening and closing are controlled by a piston rod, so as to realize the working principles of lower feeding and lower discharging, eliminate oxide slag in the alloy liquid to be formed, and improve the quality of die castings. The method that the outer probe controls the depth of the cup body immersed in the melt and the inner probe controls the height of the melt in the cup body is adopted, so that the accurate control of the soup feeding amount is realized. Chinese patent CN 104907529A also discloses a similar quantitative soup feeding system, wherein the plunger rod is driven by the driving mechanism to move up and down in the outer cylinder, so as to realize opening and closing of the discharge port. Based on the above technology, chinese patent CN 104353811A discloses a vacuum quantitative tank, which realizes automatic extraction and automatic dumping of the stock solution by controlling the vacuum degree of the vacuum cavity and the working state of the cylinder in the vacuum quantitative tank, and the stock solution is transported in a sealed manner, so that the cleanliness is high, and the oxidation of the stock solution can be effectively prevented. Chinese patent CN 103394666A discloses a soup feeding device, which is characterized in that an electrothermal tube is arranged in a valve body and a valve core on the basis of controlling a discharge valve port to be closed or opened by the driving device, and when molten metal in the device is accidentally solidified, the electrothermal tube can melt the molten metal. The prior art has the following defects: 1) The gap between the metal liquid outlet and the opening is uneven along the circumferential direction, which causes unstable outlet flow of the soup feeding device; 2) In the actual production process, the soup feeding device often collides with the die casting machine and peripheral equipment thereof, or accidentally falls down to cause leakage of high-temperature molten metal, so that the safety of operators is jeopardized, facilities are possibly damaged, and potential safety risks exist; 3) The valve is difficult to maintain, when the metal liquid is stored in the soup feeding device and is cooled and solidified when the metal liquid is subjected to long-time power failure, in the prior art, the valve core (or a stopper rod) for opening or closing the valve port and the metal liquid have large contact area, such as the Chinese patents CN 102935499A, CN 104907529A and CN 104353811A, once the metal liquid in the soup feeding device is solidified, the valve core is locked, the valve port c