Method for cleaning casting core by water vapor

Abstract

The invention relates to the technical field of castings, and discloses a method for cleaning a casting core by water vapor, which comprises the following cleaning steps: 1) a steam kettle is provided with a steam cavity, a casting is placed in the steam cavity, the casting is internally provided with a flow channel, the flow channel is provided with a flow channel inlet and a flow channel outlet, and the flow channel is filled with a core; (2) the steam cavity is heated to the set temperature and pressurized to the set pressure, and the steam cavity is kept at the set temperature and the set pressure; (3) an exhaust valve is arranged on the steam kettle, an exhaust port is formed in the exhaust valve, an outlet of the flow channel faces the exhaust port, and an inlet of the flow channel deviates from the exhaust port; the exhaust port is opened, water vapor in the steam cavity impacts the mold core from the inlet of the flow channel under the action of pressure difference, the mold core in the flow channel is collapsed, and residues exist on the inner side wall of the flow channel; (4) residues are cleaned; the casting core can be quickly and efficiently cleaned, safety and environmental protection are truly achieved, the casting quality is guaranteed, large-batch production can be achieved, the cleaning efficiency of the casting core is remarkably improved, and emission reduction and energy conservation are promoted.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of castings, specifically, to a method for cleaning casting cores with water vapor. Background Art

[0002] Casting refers to pouring molten metal into a mold. After the metal liquid solidifies and cools, it forms a casting with a certain shape and properties.

[0003] There are two types of castings: hollow and solid. The casting method of the casting with a hollow cavity is as follows:

[0004] 1) For castings with simple inner cavities, the inner cavity can be directly formed and cleaned together with the outer shape;

[0005] 2) Castings with slightly complex inner cavities can be formed by grouting, water-soluble wax, etc., and the inner cavity can be cleaned after casting;

[0006] 3) As the precision and complexity of hollow castings increase, when the inner cavity is too narrow or the shape is complex, or the inner cavity cannot be dried and hardened, it is necessary to use a pre-prepared core to form the inner cavity of the casting. After the casting is completed, try to clean the core to obtain a hollow casting.

[0007] In the prior art, three types of cleaning methods are usually used to clean cores, namely physical cleaning, chemical cleaning, and physical-chemical cleaning. These three cleaning methods have problems such as low efficiency, environmental pollution, unsafe operation, and damage to castings. Summary of the Invention

[0008] The purpose of the present invention is to provide a method for cleaning casting cores with water vapor, aiming to solve the problem of low cleaning efficiency in the prior art for cleaning casting cores.

[0009] The present invention is achieved in that a method for cleaning a casting core with water vapor comprises the following cleaning steps:

[0010] 1) The steam kettle has a steam cavity inside, and the casting formed by pouring is placed in the steam cavity. The casting has a curved flow channel, the flow channel has a flow channel inlet and a flow channel outlet, and the flow channel is filled with a core;

[0011] 2) heating the steam chamber to a set temperature and pressurizing the steam chamber to a set pressure, maintaining the steam chamber at the set temperature and set pressure, wherein the set temperature is greater than 160° C., the set pressure is greater than 6 MPa, and water vapor is present in the steam chamber;

[0012] 3) The steam kettle is provided with an exhaust valve, the exhaust valve is provided with an open or closed exhaust port, the flow channel outlet is arranged toward the exhaust port, and the flow channel inlet is arranged away from the exhaust port;

[0013] Within a set time, the exhaust port is opened, and the water vapor in the steam chamber impacts the core from the runner inlet under the action of the pressure difference, collapsing the core in the runner and ejecting it from the runner outlet. The inner wall of the runner has residue, which is the object adhering to the inner wall of the runner after the core collapses;

[0014] 4) Clean the residue in the flow channel until the residue is separated from the inner wall of the flow channel and discharged from the flow channel.

[0015] Furthermore, in the cleaning step 2), the steam chamber is heated to a set temperature, which is 400°C to 500°C.

[0016] Furthermore, in the cleaning step 2), the steam chamber is pressurized to a set pressure, and the set pressure is 11 MPa to 14 MPa.

[0017] Furthermore, in the construction step 2), after the steam chamber is heated to a set temperature and pressurized to a set pressure, the steam chamber is maintained at the set temperature and the set pressure for 12 to 18 minutes.

[0018] Furthermore, in the cleaning step 3), the exhaust port is opened within 1 second.

[0019] Furthermore, in the construction step 3), the exhaust valve is provided at the bottom of the steam kettle.

[0020] Furthermore, two clamping arms are provided inside the steam chamber and can swing toward or away from each other. The two clamping arms are spaced apart, and a clamping gap is formed between the two clamping arms. The clamping gap is located directly above the exhaust port.

[0021] The clamping arm is provided with a plurality of swinging clamping blocks, and along the height direction of the clamping arm, the plurality of clamping blocks are arranged in a staggered manner, and the plurality of clamping blocks are arranged at intervals along the circumference of the casting;

[0022] In the cleaning step 1), the lower portion of the casting is passed through the clamping gap, the two clamping arms are swung toward the casting, and the multiple clamping blocks are swung toward the casting until the multiple clamping blocks are pressed against the lower portion of the casting, thereby forming a multi-position clamp on the casting.

[0023] Furthermore, an air guide cylinder is provided inside the steam chamber, and the air guide cylinder is trumpet-shaped, with a small diameter end at one end and a large diameter end at the other end, and the diameter of the air guide cylinder gradually increases along the direction from the small diameter end to the large diameter end;

[0024] The air guide cylinder has an air guide channel inside. The air guide channel has a shape similar to that of the air guide cylinder and is arranged in a trumpet shape. The air guide channel passes through the small-diameter end to form an air outlet, and passes through the large-diameter end to form an air inlet.

[0025] In the cleaning step 1), after the casting is placed in the steam chamber, the air outlet is arranged toward the flow channel inlet with a gap therebetween, and the air inlet is arranged upward and open away from the exhaust port;

[0026] In the cleaning step 3), after the exhaust port is opened within the set time, the water vapor in the steam chamber enters the air inlet of the air guide cylinder under the action of the pressure difference, flows rapidly along the air guide channel, and is discharged from the air outlet to the runner inlet, impacting the core in the runner and causing it to collapse.

[0027] Furthermore, the small-diameter end forms a plurality of air outlets, the plurality of air outlets including a central air outlet formed in the center of the small-diameter end and a plurality of side air outlets, the plurality of side air outlets are arranged around the circumference of the small-diameter end, and the plurality of side air outlets are arranged obliquely in the same direction;

[0028] In the cleaning step 1), after the casting is placed in the steam chamber, the central air outlet is aligned with the center of the flow channel inlet, and the plurality of side air outlets are aligned along the circumference of the flow channel inlet;

[0029] In the cleaning step 3), after the exhaust port is opened within the set time, the water vapor ejected from the middle air outlet vertically impacts the middle of the core, and the water vapor ejected from the multiple side air outlets spirally impacts the outer periphery of the core, driving the core to twist, so that the core collapses, and drives the outer periphery of the core to separate from the inner wall of the runner.

[0030] Furthermore, in the cleaning step 4), the casting is placed in a cleaning pool, the cleaning pool having a pool cavity, the pool cavity being provided with water, the bottom of the pool cavity being provided with a plurality of drain ports for drainage, the bottom of the pool cavity being provided with a vibration plate for horizontal vibration, the vibration plate being provided with mounting holes, the mounting holes being aligned with the drain ports;

[0031] In the cleaning step 4), the lower portion of the casting is inserted into the mounting hole, and the casting and the vibration plate are fixed relative to each other, with the flow channel outlet facing downward and aligned with the drain port, and the flow channel inlet facing upward. The drain port is opened, and water is simultaneously poured into the top of the pool cavity. The vibration plate is synchronously vibrated horizontally, causing the flow channel outlet to move back and forth relative to the drain port. Water in the pool cavity flows from top to bottom through the flow channel and is discharged through the drain port. During the flow of the water, the water carries away any residue in the flow channel.

[0032] Compared with the prior art, the method for cleaning casting cores with water vapor provided by the present invention heats the steam chamber to a set temperature and pressurizes it to a set pressure, and the set pressure is greater than atmospheric pressure, so that the steam chamber is in a high-temperature and high-pressure state. When the exhaust port is opened, there is a large pressure difference between the steam chamber and the outside, so that during the process of water vapor flowing toward the exhaust port at high speed, it impacts the core from the flow channel inlet, breaks the core apart, and is discharged from the flow channel, thereby realizing rapid and efficient cleaning of the casting core, truly achieving safety and environmental protection, ensuring the quality of castings, and enabling mass production, significantly improving the cleaning efficiency of casting cores, and promoting emission reduction and energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic flow chart of the method for cleaning casting cores with water vapor provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the front view of the small diameter end provided by the present invention;

[0035] Figure 3 This is a schematic diagram of the main view of the gas guide cylinder provided by the present invention;

[0036] Figure 4 This is a schematic front view of the mounting hole and the drain port provided by the present invention being aligned;

[0037] Figure 5 It is a main schematic diagram of the staggered arrangement of the mounting holes and the drain outlet provided by the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0040] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] Reference Figure 1-5 The figure shows a preferred embodiment of the present invention.

[0042] The method for cleaning casting cores with steam includes the following cleaning steps:

[0043] 1) The interior of the steam kettle has a steam cavity, and the casting formed by pouring is placed in the steam cavity. The casting has a curved flow channel, the flow channel has a flow channel inlet and a flow channel outlet, and the flow channel is filled with a core;

[0044] During the casting process, a core is placed in the mold. After the casting is completed, the core is formed in the casting, and the shape of the core is the shape of the runner. In other words, the core fills the runner. In order to achieve a smooth runner, the core needs to be cleaned up later.

[0045] 2) Heat the steam chamber to the set temperature and pressurize it to the set pressure, maintain the steam chamber at the set temperature and set pressure, the set temperature is greater than 160 ° C, the set pressure is greater than 6 MPa, and there is water vapor in the steam chamber;

[0046] 3) The steam kettle is provided with an exhaust valve, in which an open or closed exhaust port is provided. The flow channel outlet is arranged toward the exhaust port, and the flow channel inlet is arranged away from the exhaust port.

[0047] Within the set time, the exhaust port is opened, and the water vapor in the steam chamber, under the action of pressure difference, impacts the core from the runner inlet, collapses the core in the runner, and is ejected from the runner from the runner outlet. The inner wall of the runner has residues, which are objects adhering to the inner wall of the runner after the core collapses;

[0048] 4) Clean the residue in the flow channel until the residue is separated from the inner wall of the flow channel and discharged from the flow channel.

[0049] The above-mentioned method for cleaning casting cores with water vapor heats the steam chamber to a set temperature and pressurizes it to a set pressure, and the set pressure is greater than atmospheric pressure, so that the steam chamber is in a high-temperature and high-pressure state. When the exhaust port is opened, there is a large pressure difference between the steam chamber and the outside, so that during the process of water vapor flowing toward the exhaust port at high speed, it impacts the core from the flow channel inlet, breaks the core and discharges it from the flow channel, thereby realizing rapid and efficient cleaning of the casting core, truly achieving safety and environmental protection, ensuring the quality of castings, and capable of mass production, significantly improving the cleaning efficiency of casting cores, and promoting emission reduction and energy conservation.

[0050] In this embodiment, when the exhaust port is opened, the water vapor in the steam chamber impacts the core from the runner inlet, which can generate a pressure difference of about △P = 100kg / cm2, causing the core to collapse and spray out of the runner of the casting.

[0051] The core inside the casting in this embodiment can be a polymagnesium core, a sand core, a ceramic core, a water-soluble core, a salt core, a precision casting core, an easily collapsible core, or a rapid prototyping core.

[0052] The casting of castings can be investment casting, sand casting, gravity casting, low pressure casting, pressure casting, lost foam casting, centrifugal casting, gypsum casting, and metal mold casting.

[0053] The materials of castings include stainless steel, carbon steel, high temperature alloy, heat-resistant steel, alloy steel, copper alloy, aluminum alloy, magnesium alloy, titanium alloy, cast steel and cast iron.

[0054] In this embodiment, in the cleaning step 2), the steam chamber is heated to a set temperature, which is 400°C to 500°C, preferably 450°C.

[0055] In this embodiment, in the cleaning step 2), the steam chamber is pressurized to a set pressure, which is 11 MPa to 14 MPa, preferably 13 MPa.

[0056] In this embodiment, in construction step 2), after the steam chamber is heated to a set temperature and pressurized to a set pressure, the steam chamber is maintained at the set temperature and set pressure for 12 to 18 minutes, and the preferred time for maintaining the temperature and pressure is 15 minutes.

[0057] In this embodiment, in the cleaning step 3), the exhaust port is opened within 1 second. In this way, the exhaust port can be opened instantaneously, so that a large pressure difference is formed between the steam chamber and the outside, and the water vapor in the steam chamber forms an instantaneous impact on the core from the flow channel inlet, achieving a large impact force on the core, so as to achieve rapid and accurate collapse of the core.

[0058] In this embodiment, in construction step 3), the exhaust valve is set at the bottom of the steam kettle. In this way, when the exhaust port is opened, the water vapor flows rapidly from top to bottom toward the exhaust port, which can further increase the impact of the water vapor on the core.

[0059] In this embodiment, two clamping arms are positioned within the steam chamber, capable of swinging toward or away from each other. The arms are spaced apart, forming a clamping gap between the arms. The clamping gap is located directly above the exhaust port. The clamping arms are provided with a plurality of swinging clamping blocks. The clamping blocks are staggered in height along the height of the clamping arms and spaced along the circumference of the casting.

[0060] In the cleaning step 1), the lower part of the casting is passed through the clamping gap, the two clamping arms are swung toward the casting, and the multiple clamping blocks are swung toward the casting until the multiple clamping blocks are pressed against the lower part of the casting, forming a multi-position clamp on the casting.

[0061] The two clamping arms can be used to clamp the casting in the steam chamber relatively fixedly, and multiple clamping blocks arranged in different heights can be used to clamp the casting in multiple positions, so that the casting is relatively fixed and stable, and is suitable for clamping castings of various sizes. In addition, the multi-position clamping of the casting by multiple clamping blocks can also prevent the casting from cracking and deformation.

[0062] In this embodiment, an air guide cylinder 100 is provided inside the steam chamber. The air guide cylinder 100 is trumpet-shaped, with a small-diameter end 103 at one end and a large-diameter end 104 at the other end. The diameter of the air guide cylinder 100 gradually increases from the small-diameter end 103 to the large-diameter end 104.

[0063] The air guide tube 100 has an air guide channel inside. The air guide channel has a shape similar to that of the air guide tube 100 and is arranged in a trumpet shape. The air guide channel passes through the small diameter end 103 to form an air outlet, and passes through the large diameter end 104 to form an air inlet.

[0064] In the cleaning step 1), after the casting is placed in the steam chamber, the air outlet is arranged toward the flow channel inlet with a gap therebetween, and the air inlet is arranged to be open upward away from the exhaust port.

[0065] In the cleaning step 3), when the exhaust port is opened within the set time, the water vapor in the steam chamber enters the air inlet of the air guide cylinder 100 under the action of the pressure difference, flows rapidly along the air guide channel, and is discharged from the air outlet to the runner inlet, impacting the core in the runner and causing it to collapse.

[0066] By placing an air guide 100 in the steam chamber, when the exhaust port is opened, water vapor can be accurately and quickly directed toward the runner inlet to impact the core, thereby collapsing the core in the runner. By arranging a trumpet-shaped air guide, water vapor can be directed along the runner, and as the diameter of the air guide gradually decreases, the water vapor in the air guide can be further accelerated, increasing its impact force on the core.

[0067] In this embodiment, the small diameter end 103 forms a plurality of the above-mentioned air outlets, and the plurality of air outlets include a central air outlet 102 formed in the center of the small diameter end 103 and a plurality of side air outlets 102. The plurality of side air outlets 102 are arranged around the circumference of the small diameter end 103, and the plurality of side air outlets 102 are arranged inclined in the same direction.

[0068] In the cleaning step 1), after the casting is placed in the steam chamber, the central air outlet 102 is aligned with the center of the flow channel inlet, and the multiple side air outlets 102 are aligned along the circumference of the flow channel inlet.

[0069] In the cleaning step 3), when the exhaust port is opened within the set time, the water vapor ejected from the middle air outlet 102 vertically impacts the middle of the core, and the water vapor ejected from multiple side air outlets 102 spirally impacts the outer periphery of the core, driving the core to twist, so that the core collapses, and drives the outer periphery of the core to separate from the inner wall of the runner.

[0070] The water vapor ejected from the middle air outlet 102 impacts the center of the core, and the multiple side air outlets 102 are arranged at an angle, and the water vapor ejected therefrom is also inclined. The water vapor ejected from the multiple side air outlets 102 is in an inclined spiral shape and impacts the outer periphery of the core. In the process of impacting and collapsing the core, the core is driven to twist, so that the outer periphery of the core and the inner side wall of the runner are quickly separated, thereby accelerating the collapse of the core.

[0071] In this embodiment, in the cleaning step 4), the casting is placed in a cleaning pool 200, which has a pool cavity 201. The pool cavity 201 is equipped with a water body. The bottom of the pool cavity 201 is provided with multiple drain ports 202 for drainage. The bottom of the pool cavity 201 is provided with a horizontally vibrating vibration plate 300, and the vibration plate 300 is provided with a mounting hole 301. The mounting hole 301 is aligned with the drain port 202.

[0072] In the cleaning step 4), the lower part of the casting is embedded in the mounting hole 301, and the casting and the vibration plate 300 are fixed relative to each other, with the flow channel outlet facing downward and aligned with the drain port 202, and the flow channel inlet facing upward.

[0073] The drain port 202 is opened, and water is poured into the top of the pool cavity 201 at the same time. The vibration plate 300 is synchronously vibrated horizontally so that the flow channel outlet moves back and forth relative to the drain port 202. The water in the pool cavity 201 passes through the flow channel from top to bottom and is discharged from the drain port 202. During the flow of the flow channel, the water carries away the residue in the flow channel.

[0074] When the drain port 202 is opened, water flows downward toward the drain port 202 , and at the same time, water is injected into the top of the pool cavity 201 to keep the total amount of water in the pool cavity 201 unchanged, ensuring that the water can continuously flow toward the drain port 202 .

[0075] The casting is fixed on the mounting hole 301 of the vibration plate 300, and the flow channel outlet is arranged toward the drain port 202. During the vibration process, the vibration plate 300 moves back and forth horizontally relative to the drain port 202 so that the flow channel outlet is aligned or misaligned with the drain port 202. In this way, the water in the pool cavity 201 forms an intermittent flow impact in the flow channel, so as to better discharge the residue on the inner wall of the flow channel out of the flow channel.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for cleaning casting cores with steam, characterized in that: The cleanup steps include: 1) The steam kettle has a steam chamber inside, and the casting formed by pouring is placed in the steam chamber. The casting has a curved flow channel, the flow channel has a flow channel inlet and a flow channel outlet, and the flow channel is filled with a core; 2) heating the steam chamber to a set temperature and pressurizing it to a set pressure, maintaining the steam chamber at the set temperature and set pressure, wherein the set temperature is greater than 160° C., the set pressure is greater than 6 MPa, and there is water vapor in the steam chamber; 3) The steam kettle is provided with an exhaust valve, the exhaust valve is provided with an open or closed exhaust port, the flow channel outlet is arranged toward the exhaust port, and the flow channel inlet is arranged away from the exhaust port; Within a set time, the exhaust port is opened, and the water vapor in the steam chamber impacts the core from the flow channel inlet under the action of pressure difference, collapses the core in the flow channel, and is ejected from the flow channel from the flow channel outlet. The inner wall of the flow channel has residues, which are objects adhered to the inner wall of the flow channel after the core collapses; 4) Clean the residues in the flow channel until the residues are separated from the inner wall of the flow channel and discharged from the flow channel.

2. The method for cleaning casting cores with steam as claimed in claim 1, characterized in that: In the cleaning step 2), the steam chamber is heated to a set temperature, and the set temperature is 400°C to 500°C.

3. The method for cleaning casting cores with steam as claimed in claim 1, characterized in that: In the cleaning step 2), the steam chamber is pressurized to a set pressure, and the set pressure is 11 MPa to 14 MPa.

4. The method for cleaning casting cores with steam as claimed in claim 1, characterized in that: In the construction step 2), after the steam chamber is heated to a set temperature and pressurized to a set pressure, the steam chamber is maintained at the set temperature and the set pressure for 12 to 18 minutes.

5. The method for cleaning casting cores with steam as claimed in claim 1, characterized in that: In the cleaning step 3), the exhaust port is opened within 1 second.

6. The method for cleaning casting cores with steam as claimed in claim 1, characterized in that: In the construction step 3), the exhaust valve is arranged at the bottom of the steam kettle.

7. The method for cleaning casting cores with steam according to any one of claims 1 to 6, characterized in that: Two clamping arms are provided inside the steam chamber and can swing toward or away from each other. The two clamping arms are arranged at an interval, and a clamping interval is formed between the two clamping arms. The clamping interval is located directly above the exhaust port. The clamping arm is provided with a plurality of swingingly arranged clamping blocks, and along the height direction of the clamping arm, the plurality of clamping blocks are arranged in a staggered manner in height, and the plurality of clamping blocks are arranged at intervals along the circumference of the casting; In the cleaning step 1), the lower part of the casting is passed through the clamping interval, the two clamping arms are swung toward the casting, and the multiple clamping blocks are swung toward the casting until the multiple clamping blocks are pressed against the lower part of the casting to form a multi-position clamp on the casting.

8. The method for cleaning casting cores with steam according to any one of claims 1 to 6, characterized in that: An air guide cylinder is provided inside the steam chamber, and the air guide cylinder is trumpet-shaped, one end of the air guide cylinder has a small diameter end, and the other end of the air guide cylinder has a large diameter end, and the diameter of the air guide cylinder gradually increases along the direction from the small diameter end to the large diameter end; The air guide cylinder has an air guide channel inside, and the air guide channel has a shape similar to that of the air guide cylinder and is arranged in a trumpet shape. The air guide channel passes through the small diameter end to form an air outlet, and the air guide channel passes through the large diameter end to form an air inlet. In the cleaning step 1), after the casting is placed in the steam chamber, the air outlet is arranged toward the flow channel inlet and is spaced apart from the flow channel inlet, and the air inlet is arranged to be open upward away from the exhaust port; In the cleaning step 3), after the exhaust port is opened within the set time, the water vapor in the steam chamber enters the air inlet of the air guide cylinder under the action of the pressure difference, flows rapidly along the air guide channel, is discharged from the exhaust port to the flow channel inlet, and impacts the core in the flow channel to cause it to collapse.

9. The method for cleaning casting cores with steam as claimed in claim 8, characterized in that: The small-diameter end forms a plurality of the air outlets, the plurality of the air outlets include a middle air outlet formed in the center of the small-diameter end and a plurality of side air outlets, the plurality of the side air outlets are arranged around the circumference of the small-diameter end, and the plurality of the side air outlets are arranged obliquely in the same direction; In the cleaning step 1), after the casting is placed in the steam chamber, the central air outlet is aligned with the center of the flow channel inlet, and the plurality of side air outlets are aligned along the circumference of the flow channel inlet; In the cleaning step 3), when the exhaust port is opened within the set time, the water vapor ejected from the middle air outlet vertically impacts the middle of the core, and the water vapor ejected from the plurality of side air outlets impacts the outer periphery of the core in a spiral shape, driving the core to twist, so that the core collapses, and driving the outer periphery of the core to separate from the inner wall of the runner.

10. The method for cleaning casting cores with steam according to any one of claims 1 to 6, characterized in that: In the cleaning step 4), the casting is placed in a cleaning pool, the cleaning pool has a pool cavity, the pool cavity is equipped with water, the bottom of the pool cavity is provided with a plurality of drain ports for drainage, the bottom of the pool cavity is provided with a vibration plate for horizontal vibration, the vibration plate is provided with a mounting hole, and the mounting hole is arranged in alignment with the drain port; In the cleaning step 4), the lower part of the casting is embedded in the mounting hole, the casting and the vibration plate are fixed relative to each other, the flow channel outlet is arranged downwardly and aligned with the drain port, and the flow channel inlet is arranged upwardly; the drain port is opened, and water is poured into the top of the pool cavity at the same time, and the vibration plate is synchronously vibrated horizontally so that the flow channel outlet moves back and forth relative to the drain port, and the water in the pool cavity passes through the flow channel from top to bottom and is discharged from the drain port. During the flow of the water in the flow channel, the residue in the flow channel is carried out and discharged.

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