Double-liquid double-metal hammerhead preparation mold based on lost foam casting

Abstract

The utility model relates to the field of evanescent mode casting, in particular to a double-liquid double-metal hammerhead preparation mold based on evanescent mode casting. The preparation mold comprises a hammer head model, the hammer head model comprises a riser, a hammer head part, a hammer handle part and a temperature measurement pouring gate, the riser, the hammer head part and the hammer handle part are sequentially connected from top to bottom, the temperature measurement pouring gate is located on one side of the riser, and the bottom end of the temperature measurement pouring gate is connected with the hammer handle part and is close to the joint of the hammer handle part and the hammer head part; the casting sand box is provided with a cavity matched with the hammerhead model; the thermocouple is used for being inserted into the bottom of a cavity where the temperature measuring pouring gate is located; the ultrasonic device is used for being inserted into a cavity where the riser, the hammer handle part and the hammer head part are located; and the lifting device is in transmission connection with the ultrasonic device so as to drive the ultrasonic device to move in the vertical direction. By means of the manufacturing mold, the problem that casting defects exist when a double-liquid double-metal hammer is cast in an existing casting technology is solved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lost foam casting, and in particular to a mold for preparing a bimetallic hammerhead based on lost foam casting. Background Technology

[0002] Hydraulic breaker hammers are widely used in industries such as mining and building materials. Their working environment is harsh, and they are considered wear-prone components. Therefore, there is a need to develop a hammer with excellent performance and low manufacturing cost. Bimetallic breaker hammers are widely used due to the sufficient strength and toughness of their shank and the high hardness and wear resistance of their hammerhead.

[0003] Currently, the main casting methods for bimetallic hammerheads include sand casting, metal mold casting, and traditional lost foam casting. Among them, sand casting suffers from casting defects and scrap due to the processes of mold removal, mold assembly, core making, and core placement, while also resulting in rough surfaces and high production costs. Metal mold casting requires each mold to produce only one type of casting, and changing the type necessitates the creation of a new mold, which increases mold manufacturing costs. Traditional lost foam casting, during the pouring process, generates gas and residues due to foam vaporization, causing defects such as carbon enrichment, slag inclusions, and porosity in the castings. Utility Model Content

[0004] The purpose of this invention is to provide a mold for preparing a bimetallic hammerhead based on lost foam casting, so as to alleviate the problem of casting defects in the existing casting technology when casting bimetallic hammerheads.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] The present invention provides a mold for preparing a bimetallic hammer head based on lost foam casting, comprising: a hammer head model, the hammer head model including a riser, a hammer head, a hammer handle and a temperature measuring runner, wherein, from top to bottom, the riser, the hammer head and the hammer handle are connected in sequence, the temperature measuring runner is located on one side of the riser, its bottom end is connected to the hammer handle and is close to the connection between the hammer handle and the hammer head;

[0007] A casting sand box having a cavity adapted to the hammer head model;

[0008] A thermocouple, which is used to be inserted into the bottom of the cavity where the temperature measuring runner is located;

[0009] An ultrasonic device is used to be inserted into the cavity where the riser, the hammer handle, and the hammer head are located.

[0010] A lifting device is connected to the ultrasonic device via a transmission connection to drive the ultrasonic device to move vertically.

[0011] Furthermore, the lifting device includes:

[0012] frame;

[0013] A bracket for mounting the ultrasonic device and slidably connected to the frame, with the sliding path extending vertically;

[0014] A linear drive assembly is connected to the bracket to drive the bracket to slide along a preset path on the frame.

[0015] Furthermore, the linear drive component includes:

[0016] A lead screw extends vertically and passes through the bracket, and is threadedly connected to the bracket. Both ends of the lead screw are rotatably engaged with the frame.

[0017] A rotary driver, which is fixed to the frame, has its output connected to one end of the lead screw.

[0018] Furthermore, the bottom of the frame is equipped with casters.

[0019] Furthermore, the temperature measuring gating system is L-shaped and includes an integrally formed first vertical gating system and a first horizontal gating system;

[0020] The first vertical gating channel is located near the hammer handle.

[0021] The first horizontal runner is connected to the hammer handle and is lower than the hammer head.

[0022] Furthermore, the hammer model also includes:

[0023] A head gating system, the bottom end of which is connected to the hammer head;

[0024] The sprue is a gate, the bottom end of which is connected to the hammer handle.

[0025] Furthermore, both the head runner and the shank runner are composed of an integrally formed second vertical runner and an arc-shaped runner, and the free ends of the arc-shaped runners of the two are their respective bottom ends.

[0026] Furthermore, the hammerhead model also includes an overflow gating system, which is T-shaped and includes an integrally formed third vertical gating system and a second horizontal gating system.

[0027] The two ends of the second horizontal sprue are connected to the third vertical sprue and the hammer head, respectively. The lower surface of the second horizontal sprue is higher than the bottom of the third vertical sprue and flush with the top of the hammer handle.

[0028] Furthermore, the thermocouple is one of the following types: S, R, B, N, and K.

[0029] The probe of the ultrasonic device is made of heat-resistant metal or ceramic.

[0030] Furthermore, the surfaces of both the thermocouple and the ultrasonic device used to probe the molten metal are coated with a high-temperature anti-adhesion coating.

[0031] Compared with the prior art, the beneficial effects of the bimetallic hammerhead preparation mold based on lost foam casting provided by this utility model are as follows:

[0032] When this lost foam casting-based bimetallic hammerhead preparation mold is applied, the hammerhead model is vibrated and compacted in the casting sand box; the ultrasonic device is placed from the riser cavity to the lowest point of the hammer handle cavity via a lifting device; the thermocouple is placed in the temperature measuring runner cavity, with its bottom end below the set height plane of the hammer handle, and the vertical distance from this plane is about 1 / 2 of the width of the mixed area of ​​the hammer handle and the hammerhead.

[0033] As mentioned above, during casting, the hammer handle is cast at a uniform speed. At the same time, as the molten liquid level rises, the lifting device slowly raises the height of the ultrasonic device, ensuring that the ultrasonic device continues to work in the molten metal. After the hammer handle is filled, the ultrasonic device remains in the molten metal for a period of time, while the change in the thermocouple temperature reading is observed.

[0034] Continuing from the above, when the temperature monitored by the thermocouple reaches the preset temperature, the ultrasonic device is lifted to the preset height of the liquid surface at the hammer handle by the lifting device and comes into contact with the liquid surface. The thermocouple stops working and is removed from the temperature measuring channel.

[0035] Continuing from the above, when the temperature monitored by the thermocouple reaches the preset temperature, the hammer head is poured at a uniform speed. At the same time, the ultrasonic device is slowly lifted by the lifting device as the molten metal level in the hammer head cavity rises. After the hammer head is filled, the ultrasonic device stays in the molten metal for a short period of time, then is removed before the molten metal solidifies and stops working. When the hammer head temperature reaches about room temperature, the box is opened, the hammer head is taken out, the surface of the hammer head is cleaned, and the gating and riser are cut off.

[0036] As can be seen from the above, this application employs a lost foam casting process, utilizing the vibration field generated by an ultrasonic device to degas the hammerhead, refine the grains, and improve filling capacity, thereby enhancing the matrix structure. Simultaneously, it makes the width, composition, and matrix structure of the bonding area between the two metals more uniform. Thermocouples are used to monitor the temperature change of the hammer handle in real time, accurately controlling the pouring time of the hammerhead and avoiding problems such as inconsistent composite interface width and insufficient bonding performance caused by pouring temperature errors. Therefore, the prepared bimetallic hammerhead reduces defects such as carbon enrichment, inclusions, uneven composition, and porosity caused by carbon in the foam in traditional lost foam casting processes.

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a front view of a mold for preparing a bimetallic hammerhead based on lost foam casting, provided in an embodiment of the present invention.

[0040] Figure 2 A side view of the mold for preparing a bimetallic hammerhead based on lost foam casting provided in an embodiment of this utility model;

[0041] Figure 3 A schematic diagram of the lifting device provided in an embodiment of this utility model;

[0042] Figure 4 A cross-sectional view along the main viewing direction of the hammer head model and the casting sand box arrangement provided in the embodiment of this utility model;

[0043] Figure 5 A sectional view along the side view direction of the hammer head model and the casting sand box arrangement provided in the embodiment of this utility model;

[0044] Figure 6 This is a process flow diagram for preparing a double-liquid bimetallic hammerhead based on the mold provided in the embodiment of this utility model.

[0045] icon:

[0046] 100 - Hammer head model; 110 - Riser; 120 - Hammer head; 130 - Hammer handle; 140 - Temperature measuring runner; 150 - Head runner; 160 - Handle runner; 170 - Overflow runner;

[0047] 200 - Foundry sand box; 210 - Exhaust port;

[0048] 300 - Thermocouple; 400 - Ultrasonic device;

[0049] 500-Lifting device; 510-Frame; 520-Bracket; 530-Linear drive assembly; 540-Wheel caster; 531-Lead screw; 532-Rotary drive. Detailed Implementation

[0050] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0053] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0056] Currently, the main casting methods for bimetallic hammerheads include sand casting, metal mold casting, and traditional lost foam casting. Among them, sand casting suffers from casting defects and scrap due to the processes of mold removal, mold assembly, core making, and core placement, while also resulting in rough surfaces and high production costs. Metal mold casting requires each mold to produce only one type of casting, and changing the type necessitates the creation of a new mold, which increases mold manufacturing costs. Traditional lost foam casting, during the pouring process, generates gas and residues due to foam vaporization, causing defects such as carbon enrichment, slag inclusions, and porosity in the castings.

[0057] In view of this, this utility model embodiment provides a mold for preparing a bimetallic hammerhead based on lost foam casting, referencing... Figures 1 to 5 The mold for preparing a bimetallic hammerhead based on lost foam casting includes: a hammerhead model 100, which includes a riser 110, a hammerhead 120, a hammer handle 130, and a thermometric runner 140. From top to bottom, the riser 110, hammerhead 120, and hammer handle 130 are sequentially connected. The thermometric runner 140 is located on one side of the riser 110, with its bottom end connected to the hammer handle 130 and close to the junction of the hammer handle 130 and the hammerhead 120. The sand box 200 has a cavity adapted to the hammer head model 100; the thermocouple 300 is used to be inserted into the bottom of the cavity where the temperature measuring runner 140 is located; the ultrasonic device 400 is used to be inserted into the cavity where the riser 110, the hammer handle 130 and the hammer head 120 are located; the lifting device 500 is connected to the ultrasonic device 400 to drive the ultrasonic device 400 to move vertically.

[0058] When the mold for preparing a bimetallic hammer head based on lost foam casting is applied, the hammer head model 100 is vibrated and compacted in the casting sand box 200; the ultrasonic device 400 is placed at the lowest point of the cavity where the hammer handle 130 is located via the lifting device 500 from the cavity where the riser 110 is located; the thermocouple 300 is placed in the cavity where the temperature measuring runner 140 is located, with its bottom end below the set height plane of the hammer handle 130, and the vertical distance from the plane is about 1 / 2 of the width of the mixed area of ​​the hammer handle 130 and the hammer head 120.

[0059] As described above, during casting, the hammer handle 130 is cast at a uniform speed. At the same time, as the molten liquid level rises, the lifting device 500 slowly raises the height of the ultrasonic device 400, ensuring that the ultrasonic device 400 remains in the molten metal and continues to work. After the hammer handle 130 is filled, the ultrasonic device 400 remains in the molten metal for a period of time, while the temperature reading of the thermocouple 300 is observed.

[0060] Continuing from the above, when the temperature monitored by the thermocouple 300 reaches the preset temperature, the ultrasonic device 400 is lifted by the lifting device 500 to the preset height of the liquid surface at the hammer handle 130 and comes into contact with the liquid surface. The thermocouple 300 stops working and is removed from the temperature measuring channel 140.

[0061] Continuing from the above, when the temperature monitored by thermocouple 300 reaches the preset temperature, the hammer head 120 is poured at a uniform speed. At the same time, the ultrasonic device 400 is slowly lifted by the lifting device 500 as the molten metal level in the cavity of the hammer head 120 rises. After the hammer head 120 is filled, the ultrasonic device 400 stays in the molten metal for a short period of time, then is removed before the molten metal solidifies and stops working. When the temperature of the hammer head reaches about room temperature, the box is opened, the hammer head is taken out, the surface of the hammer head is cleaned, and the gating and riser 110 are cut off.

[0062] As can be seen from the above, this application employs a lost foam casting process, utilizing the vibration field generated by the ultrasonic device 400 to degas the hammerhead, refine the grains, and improve the filling capacity, thereby enhancing the matrix structure. Simultaneously, it makes the width, composition, and matrix structure of the bonding area between the two metals more uniform. Thermocouple 300 is used to monitor the temperature change of the hammer handle 130 in real time, accurately controlling the pouring time of the hammerhead 120, avoiding problems such as inconsistent composite interface width and insufficient bonding performance caused by pouring temperature errors. Therefore, the prepared bimetallic hammerhead reduces defects such as carbon enrichment, inclusions, uneven composition, and porosity caused by carbon in the foam in traditional lost foam casting processes.

[0063] It should be added here that the casting sand box 200 is equipped with an air extraction port 210, which uses a negative pressure system to quickly extract the vaporization products of the hammer head model 100 from the cavity.

[0064] Regarding the lifting device 500, specifically:

[0065] refer to Figure 3 The lifting device 500 includes: a frame 510; a bracket 520, which is used to install the ultrasonic device 400 and is slidably connected to the frame 510, and the sliding path extends vertically; and a linear drive assembly 530, which is connected to the bracket 520 to drive the bracket 520 to slide along a preset path on the frame 510.

[0066] For details, please refer to [link / reference]. Figure 3 The linear drive assembly 530 includes: a lead screw 531, which extends vertically and passes through and is threadedly connected to a bracket 520, with both ends of the lead screw 531 rotatably engaged with a frame 510; and a rotary driver 532, which is a motor fixed to the frame 510, with its output connected to one end of the lead screw 531. A guide rod is fixed to the frame 510, passing through and slidably engaged with the bracket 520, with both its upper and lower ends connected to the frame 510. Optionally, two guide rods are provided, symmetrically distributed about the lead screw 531. Optionally, a caster wheel 540 is provided at the bottom of the frame 510.

[0067] In application, the lifting device 500 is pushed to the preset position, the motor is started, and the lead screw 531 rotates around its own axis, thereby driving the bracket 520 to move vertically, thus lifting and lowering the ultrasonic device 400.

[0068] More preferably, refer to Figure 5 The temperature-measuring runner 140 is L-shaped, including an integrally formed first vertical runner and a first horizontal runner; the first vertical runner is close to the hammer handle portion 130; the first horizontal runner is connected to the hammer handle portion 130 and is lower than the hammer head 120. With this design, the thermocouple 300 can measure the temperature of the molten metal at the junction of the hammer head 120 and the hammer handle portion 130, thereby accurately controlling the pouring time of the molten metal at the hammer head 120.

[0069] Further reference Figure 4 and Figure 5 The hammerhead model 100 further includes: a head sprue 150, the bottom end of which is connected to the hammer head 120; and a handle sprue 160, the bottom end of which is connected to the hammer handle 130. Preferably, both the head sprue 150 and the handle sprue 160 are composed of an integrally formed second vertical sprue and an arc-shaped sprue, with the free ends of the arc-shaped sprues being their respective bottom ends. This design reduces the likelihood of turbulent flow and gas entrainment during casting, thereby reducing porosity.

[0070] Further reference Figure 4 The hammerhead model 100 also includes an overflow gating system 170, which is T-shaped and includes an integrally formed third vertical gating and a second horizontal gating. The two ends of the second horizontal gating are connected to the third vertical gating and the hammerhead 120, respectively. The lower surface of the second horizontal gating is higher than the bottom of the third vertical gating and flush with the top of the hammer handle 130. This design allows the overflow gating system 170 to accommodate molten metal exceeding the set height of the hammer handle 130, preventing excessive metal accumulation.

[0071] Optionally, the thermocouple 300 can be one of the following types: S, R, B, N, or K. The protective sheath of the thermocouple 300 is a high-temperature thermocouple 300 protective sheath. The probe of the ultrasonic device 400 is made of heat-resistant metal or ceramic. The surfaces of both the thermocouple 300 and the ultrasonic device 400 used to probe the molten metal are coated with a high-temperature anti-adhesion coating. The high-temperature anti-adhesion coating is required to have a certain strength to prevent the ultrasonic waves from cracking the coating. It is an existing coating, and the specific selection will not be elaborated here.

[0072] refer to Figure 6 and combined Figures 1 to 5 As shown in the figure, the preparation process of the double-liquid bimetallic hammerhead preparation mold based on lost foam casting provided in this embodiment is as follows:

[0073] S1. Prepare the foam model, namely the hammerhead model 100. Connect the riser 110, hammerhead 120, hammer handle 130, and each gating system accordingly, and then coat the entire model with paint and dry it. Here, the coating and drying process is repeated several times. The paint should have certain strength and high temperature resistance, and be able to withstand high-frequency vibration and high-temperature shell burning.

[0074] S2, the coated foam model is placed in a heat treatment furnace for low-temperature glue removal and high-temperature shell firing. After the shell is formed, it is placed in a sand box for packing and dry sand is added.

[0075] S3. Place the sand box with the completed sand box onto the vibrating table and use the vibrating table to compact the dry sand inside the sand box, so that the dry sand inside reaches a compacted state.

[0076] S4. Apply a high-temperature anti-adhesion coating to the parts of the ultrasonic device 400 and the thermocouple 300 that are inserted into the molten metal.

[0077] S5, simultaneously melting two different compositions of molten metal corresponding to the hammer head 120 and the hammer handle 130.

[0078] S6, pour the hammer handle 130, while the ultrasonic device 400 and thermocouple 300 perform high-frequency vibration and real-time temperature measurement respectively. When the molten metal reaches the preset liquid level position of the hammer handle, the pouring stops.

[0079] In this step, the ultrasonic device 400 and thermocouple 300 are first inserted into the mold cavity through the riser 110 and the temperature measuring runner 140, respectively. The ultrasonic device 400 is positioned at the lowest point of the hammer handle 130 cavity that it can reach, and the thermocouple 300 is positioned below the set height plane of the hammer handle 130, with a vertical distance from this plane approximately half the width of the mixed area of ​​the hammer handle 130 and the hammer head 120. Before pouring, the ultrasonic device 400 and thermocouple 300 begin to operate; the molten hammer handle 130 is then poured. The metal is poured at a constant speed through the sprue 160. During this process, the bottom of the third vertical sprue of the overflow sprue 170 is observed. When molten metal flows into the bottom of the third vertical sprue, it indicates that the molten metal level in the hammer sprue 130 has reached the preset liquid level height. The pouring is stopped immediately. During the pouring process, the ultrasonic device 400 is slowly raised as the molten metal level in the cavity of the hammer sprue 130 rises. After the filling is completed, the ultrasonic device 400 remains in the molten metal for a period of time, while the temperature reading of the thermocouple 300 is observed in real time.

[0080] S7, when the temperature reaches the preset temperature, the ultrasonic device 400 moves to the liquid surface on the hammer handle 130, and the thermocouple 300 stops working and is removed.

[0081] S8, the pouring hammer head 120 is poured, and the ultrasonic device 400 performs high-frequency vibration. Here, the molten metal of the pouring hammer head 120 is poured at a constant speed through the head gating 150, and the ultrasonic device 400 slowly rises in height as the molten metal surface in the cavity of the hammer head 120 rises.

[0082] S9, after the hammer head 120 is filled, the ultrasonic device 400 is briefly placed in the molten metal for a period of time, and then stopped and removed before the molten metal solidifies.

[0083] S10. When the casting temperature reaches about room temperature, open the box and take out the hammer.

[0084] S11, the hammer head performs surface cleaning and cuts off the gating system and riser 110.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mold for preparing a bimetallic hammerhead based on lost foam casting, characterized in that, include: A hammer head model (100) includes a riser (110), a hammer head (120), a hammer handle (130), and a temperature measuring gating (140). From top to bottom, the riser (110), the hammer head (120), and the hammer handle (130) are connected in sequence. The temperature measuring gating (140) is located on one side of the riser (110), and its bottom end is connected to the hammer handle (130) and close to the connection between the hammer handle (130) and the hammer head (120). A casting sand box (200) having a cavity adapted to the hammer head model (100); Thermocouple (300), the thermocouple (300) is used to be inserted into the bottom of the cavity where the temperature measuring runner (140) is located; An ultrasonic device (400) is used to be inserted into the cavity where the riser (110), the hammer handle (130) and the hammer head (120) are located; A lifting device (500) is connected to the ultrasonic device (400) for driving the ultrasonic device (400) to move vertically.

2. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 1, characterized in that, The lifting device (500) includes: Frame (510); A bracket (520) is used to mount the ultrasonic device (400) and is slidably connected to the frame (510), with the sliding path extending vertically. A linear drive assembly (530) is connected to the bracket (520) to drive the bracket (520) to slide along a preset path on the frame (510).

3. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 2, characterized in that, The linear drive assembly (530) includes: A lead screw (531) extends vertically and passes through the bracket (520) and is threadedly connected to the bracket (520). Both ends of the lead screw (531) are rotatably engaged with the frame (510). A rotary actuator (532) is fixed to the frame (510), and its output is connected to one end of the lead screw (531).

4. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 2, characterized in that, The bottom end of the frame (510) is provided with casters (540).

5. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 1, characterized in that, The temperature measuring runner (140) is L-shaped and includes an integrally formed first vertical runner and a first horizontal runner; The first vertical gating channel is located near the hammer handle (130); The first horizontal runner is connected to the hammer handle (130) and is lower than the hammer head (120).

6. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 1, characterized in that, The hammerhead model (100) also includes: A head gating system (150) is provided, the bottom end of which is connected to the hammer head (120). A sprue (160) is provided, the bottom end of which is connected to the hammer handle (130).

7. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 6, characterized in that, Both the head runner (150) and the shank runner (160) are composed of an integrally formed second vertical runner and an arc-shaped runner, and the free ends of the arc-shaped runners of the two are their respective bottom ends.

8. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 1, characterized in that, The hammerhead model (100) also includes an overflow gating (170), which is T-shaped and includes an integrally formed third vertical gating and a second horizontal gating; The two ends of the second horizontal sprue are connected to the third vertical sprue and the hammer head (120) respectively. The lower surface of the second horizontal sprue is higher than the bottom of the third vertical sprue and is flush with the top of the hammer handle (130).

9. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 1, characterized in that, The thermocouple (300) is one of the following types: S, R, B, N, and K. The probe of the ultrasonic device (400) is made of heat-resistant metal or ceramic.

10. The mold for preparing a bimetallic hammerhead based on lost foam casting according to claim 9, characterized in that, Both the thermocouple (300) and the ultrasonic device (400) have their surfaces coated with a high-temperature anti-adhesion coating on the parts used to probe the molten metal.

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