Multifunctional gravity integrated casting pouring mold

Abstract

The invention discloses a multifunctional gravity integrated casting pouring mold, which comprises a fluidity sample lower mold, a gravity casting mold, a gravity casting mold and a gravity casting mold, and is characterized in that a spiral cavity is formed in the top of the fluidity sample lower mold; the upper fluidity sample mold covers the upper part of the lower fluidity sample mold; the tensile test bar lower die is fixedly connected with the fluidity sample lower die; the tensile test bar upper die is arranged above the tensile test bar lower die, and a plurality of tensile test bar cavities are formed between the tensile test bar upper die and the tensile test bar lower die; the casting head integrated structure is detachably connected to the tensile test bar upper die and is provided with a first casting head, a second casting head, a pouring cup, a triangular sample cavity and a plate-shaped sample cavity; the first casting head is communicated with the spiral cavity; the second casting head is simultaneously communicated with the plurality of tensile test bar cavities; the sprue cup is located between the first casting head and the second casting head, and the cup wall height of the joint of the sprue cup and the first casting head is smaller than that of the joint of the sprue cup and the second casting head; and the second casting head is sequentially communicated with the triangular sample cavity and the plate-shaped sample cavity.

Description

Technical Field

[0001] The invention belongs to the technical field of casting molds of metal materials, and in particular relates to a multifunctional gravity integrated casting pouring mold. Background Art

[0002] In the foundry industry, gravity casting molds are an indispensable component. With the gradual development and application of high-pressure pressure casting and semi-solid die-casting technology for non-ferrous metals, the traditional high-cost and low-efficiency R&D model is facing challenges. For example, in the early stages of the development of high-pressure die-casting and semi-solid die-casting processes, a smelting furnace with a molten alloy mass of at least 300 kg is usually required, which not only causes serious waste of raw materials, but also greatly increases the R&D cost. To solve this problem, it is of great significance to first use gravity casting to conduct preliminary organizational and performance tests on non-ferrous metals. However, for ferrous metals, such as cast iron and cast steel, they are not currently suitable for high-pressure die-casting and semi-solid die-casting processes, which further highlights the importance of gravity casting.

[0003] In the production process of non-ferrous metals (such as aluminum alloys and magnesium alloys), plates, extruded bars and profiles, it is usually necessary to first produce high-quality ingots through gravity casting, and then undergo various heat treatments and processing. Therefore, the quality of the ingot directly affects the performance of the final product, and the gravity casting process and its material optimization are the key to improving the quality of the ingot.

[0004] In order to meet the production needs of enterprises, it is crucial to examine the composition, microstructure, mechanical properties and fluidity of liquid metal. However, traditional detection methods usually require sampling from a specific position of the ingot, which is not only time-consuming, but also difficult to ensure the accuracy of the sampling position, thus affecting the accurate evaluation of the alloy structure and performance. In the prior art, most scientific research units use a single gravity casting mold for testing. For example, in order to detect the fluidity and filling performance of liquid metal, a single spiral mold or a round mold is usually used; when examining the organization and mechanical properties, it is necessary to use casting samples from different furnaces or batches, which requires multiple castings to obtain the required samples. In addition, in order to study the solidification process of liquid metal, separate casting molding is also required, which means that in order to evaluate the four key indicators of gravity casting alloys, it is usually necessary to use at least three separate molds and cast three times to obtain different samples. This method is not only cumbersome and time-consuming, but also difficult to ensure the consistency of the alloy composition, liquid metal pouring temperature and mold temperature for each pouring, thereby affecting the stability and consistency of the final alloy composition, microstructure, mechanical properties and flow properties. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a multifunctional gravity integrated casting mold, which can realize the casting of various samples under the same casting conditions, ensure the stability and consistency of the obtained samples, and can greatly reduce the use of raw materials.

[0006] The technical solution provided by the present invention is:

[0007] A multifunctional gravity integrated casting mold, comprising:

[0008] The lower die of the fluidity specimen has a spiral cavity on the top;

[0009] A fluidity sample upper mold, which covers the fluidity sample lower mold;

[0010] A lower die for the tensile test bar, which abuts against one end of the lower die for the fluidity test sample in the length direction and is fixedly connected to the lower die for the fluidity test sample;

[0011] A tensile test bar upper die, which is arranged above the tensile test bar lower die;

[0012] The top of the lower die of the tensile test bar is provided with a plurality of first grooves, and the bottom of the upper die of the tensile test bar is provided with a plurality of second grooves; the second grooves are arranged in one-to-one correspondence with the first grooves, and are combined to form a tensile test bar cavity;

[0013] An integrated pouring and riser structure, which is detachably connected to the upper die of the tensile test bar;

[0014] A first pouring and rising gate, which is opened at the top of the pouring and rising gate integrated structure and is connected to the spiral cavity through a first runner opened in the upper mold of the fluidity specimen;

[0015] A second pouring and rising gate is provided at the top of the pouring and rising gate integrated structure and is connected to the plurality of tensile test bar cavities simultaneously through a second pouring channel provided in the tensile test bar upper mold;

[0016] A pouring cup is provided between the first pouring riser and the second pouring riser, wherein the height of the cup wall at the connection between the pouring cup and the first pouring riser is less than the height of the cup wall at the connection between the pouring cup and the second pouring riser;

[0017] A triangular specimen cavity is provided on the integrated pouring and riser structure, and a third pouring and riser is formed on the top of the triangular specimen cavity;

[0018] A plate-shaped sample cavity is provided on the integrated pouring and riser structure, and a fourth pouring and riser is formed on the top of the plate-shaped sample cavity;

[0019] Wherein, the second pouring riser, the third pouring riser and the fourth pouring riser are connected in sequence.

[0020] Preferably, a plurality of lower die through holes are provided in the fluidity sample lower die; the lower die through holes are provided along the width direction of the fluidity sample lower die, and the plurality of lower die through holes are arranged at intervals along the length direction of the fluidity sample lower die;

[0021] A plurality of upper die through holes are provided in the fluidity sample upper die; the upper die through holes are arranged in parallel with the lower die through holes in a one-to-one correspondence;

[0022] Wherein, heating tubes are placed in the lower mold through hole and the upper mold through hole.

[0023] Preferably, the integrated pouring and riser structure is provided with a plurality of temperature measuring through holes spaced apart from top to bottom on one side corresponding to the triangular specimen cavity, and thermocouples are placed in the temperature measuring through holes.

[0024] Preferably, the cavity wall of the spiral cavity is sprayed with BN coating.

[0025] Preferably, a gate cavity is provided at the top of the lower mold of the fluidity specimen, one end of the gate cavity is connected to the first runner, and the other end of the gate cavity is connected to the spiral cavity.

[0026] Preferably, the first runner is cylindrical and vertically arranged; the gate cavity is cylindrical and coaxially arranged with the first runner;

[0027] The diameter of the gate cavity is at least 1.5 times the cross-sectional width of the spiral runner, and the first runner has the same diameter as the gate cavity.

[0028] Preferably, the ratio of the cup wall height at the connection between the pouring cup and the first pouring riser to the cup wall height at the connection between the pouring cup and the second pouring riser is 0.3 to 0.65.

[0029] Preferably, the second runner is opened at the center of the upper die of the tensile test bar; the tensile test bar cavities are divided into two groups, and the two groups of tensile test bar cavities are arranged at intervals along the length direction of the lower die of the fluidity test sample;

[0030] Wherein, each group of tensile test bar cavities includes two tensile test bar cavities; the tensile test bar cavities are arranged along the width direction of the fluidity test specimen lower mold, and the two tensile test bar cavities in the same group are symmetrically arranged on both sides of the second runner and are respectively connected to the second runner.

[0031] Preferably, the two tensile test bar cavities are gradually inclined upward from one end connected to the second runner to one end away from the second runner, so that an angle is formed between the axis of the tensile test bar cavity and the horizontal plane.

[0032] Preferably, the angle between the axis of the tensile test bar cavity and the horizontal plane is 5° to 10°.

[0033] The beneficial effects of the present invention are:

[0034] The multifunctional gravity integrated casting mold provided by the present invention can realize the casting of various samples under the same casting conditions, ensure the stability and consistency of the obtained samples, and can greatly reduce the use of raw materials and improve the casting efficiency of the samples; while reducing costs, it can also reduce carbon emissions and has significant environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the multifunctional gravity integrated casting pouring mold described in the present invention.

[0036] Figure 2 It is a three-dimensional diagram of the multifunctional gravity integrated casting mold described in the present invention.

[0037] Figure 3 for Figure 1 Middle CC section view.

[0038] Figure 4 for Figure 1 Middle DD section view.

[0039] Figure 5 It is a structural schematic diagram of the upper die of the tensile test bar described in the present invention.

[0040] Figure 6 It is a structural schematic diagram of the lower die of the tensile test bar described in the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0042] like Figure 1-6 As shown, the present invention provides a multifunctional gravity integrated casting mold, which includes: a fluidity sample lower mold 110, a fluidity sample upper mold 120, a tensile test bar lower mold 130, a tensile test bar upper mold 140 and a pouring and riser integrated structure 150.

[0043] The fluidity sample lower mold 110 is horizontally arranged, and a spiral cavity 111 is opened on the top. The cross section of the spiral cavity 111 is semicircular, rectangular, trapezoidal or U-shaped. The length of the spiral cavity 111 is at least 1000 mm, the depth is 10 mm to 12 mm, and the (maximum) width of the cross section of the spiral cavity 111 is 12 mm to 16 mm. The plane size of the fluidity sample upper mold 120 is the same as the plane size of the fluidity sample lower mold 110, and covers the fluidity sample lower mold 110.

[0044] As a preferred embodiment, a scale mark is provided at the bottom of the spiral cavity 111 to facilitate reading the length of the fluidity sample, so that the length of the sample can be read without taking out the sample.

[0045] As a further preference, the cavity wall of the spiral cavity 111 is sprayed with BN coating to facilitate the removal of the flowability sample.

[0046] In this embodiment, the fluidity specimen upper mold 110 is divided into two parts with the same plane size in the width direction, and is formed by butting the two parts to facilitate installation and demoulding.

[0047] As a preferred embodiment, a plurality of lower mold through holes 112 are provided in the fluidity sample lower mold 110; the lower mold through holes 112 penetrate the fluidity sample lower mold 110 along the width direction of the fluidity sample lower mold 110, and the plurality of lower mold through holes 112 are evenly spaced along the length direction of the fluidity sample lower mold 110. A plurality of upper mold through holes 121 are provided in the fluidity sample upper mold 120; the upper mold through holes 121 are arranged in parallel with the lower mold through holes 112 in a one-to-one correspondence. Among them, heating tubes are placed in both the lower mold through holes 112 and the upper mold through holes 121 for heating the mold.

[0048] The fluidity sample lower mold 110 is provided with a lower mold temperature measuring hole 113, and the fluidity upper mold 120 is provided with an upper mold temperature measuring hole 122. Thermocouples are placed in the lower mold temperature measuring hole 113 and the upper mold temperature measuring hole 122 respectively for measuring the mold temperature.

[0049] As a further preference, a plurality of threaded holes 120a with a diameter of 8 mm are provided on the top of the fluidity sample upper mold 120 for installing a handle for easy access.

[0050] The tensile test bar lower die 130 abuts against one end of the fluidity specimen lower die 110 in the length direction and is fixedly connected to the fluidity specimen lower die 110. The tensile test bar upper die 140 is arranged above the tensile test bar lower die 130. A plurality of first grooves are provided on the top of the tensile test bar lower die 130, and a second groove is provided on the bottom of the tensile test bar upper die 140; the second grooves are arranged one by one corresponding to the first grooves, and are combined to form a tensile test bar cavity 131.

[0051] In this embodiment, a plurality of cylindrical pins 132 are provided at one end of the tensile test bar lower die 130, and a plurality of pin holes are correspondingly opened in the fluidity sample lower die 110. The cylindrical pins 132 are connected in the pin holes by interference fit, thereby realizing a fixed connection between the tensile test bar lower die 130 and the fluidity sample lower die 110.

[0052] The integrated pouring and rising structure 150 is detachably connected to the tensile test bar upper die 140. In this embodiment, one end of the integrated pouring and rising structure 150 extends to the upper part of the fluidity test sample upper die 120, and the other end extends to the outer side of one end of the tensile test bar upper die 140 away from the fluidity test sample lower die 110, and at the same time abuts against the tensile test bar upper die 140 and the upper tensile test bar lower die 130. A recessed portion with an opening facing downward is formed in the middle of the integrated pouring and rising structure 150, and the recessed portion is matched and engaged with the tensile test bar upper die 140.

[0053] The first pouring and rising gate 151 is opened on the top of the pouring and rising gate integrated structure 150 , and is connected with the spiral cavity 111 through the first runner 123 opened in the fluidity specimen upper mold 120 .

[0054] In this embodiment, a gate cavity 114 is formed on the top of the fluidity specimen lower mold 110 . One end of the gate cavity 114 is connected to the first runner 123 , and the other end of the gate cavity 114 is connected to the spiral cavity 111 .

[0055] As a preferred embodiment, the first runner 123 is cylindrical and vertically arranged; the gate cavity 114 is cylindrical and coaxially arranged with the first runner 123. The diameter of the gate cavity 114 is at least 1.5 times the (maximum) width of the cross section of the spiral runner 111, and the first runner 123 and the gate cavity 114 have the same diameter.

[0056] The second pouring and rising gate 152 is opened on the top of the pouring and rising gate integrated structure 150 , and is simultaneously connected with the plurality of tensile test bar cavities 131 through the second runner 141 opened in the tensile test bar upper mold 140 .

[0057] In this embodiment, the second runner 141 is opened in the central position of the tensile test bar upper mold 140 along the vertical direction, and the top of the second runner 141 is aligned with and connected to the second pouring riser 152. The tensile test bar mold cavity 131 is divided into two groups, and the two groups of tensile test bar mold cavities 131 are arranged at intervals along the length direction of the fluidity sample lower mold 110. Among them, each group of tensile test bar mold cavities 131 includes two tensile test bar mold cavities 131; the tensile test bar mold cavities 131 are arranged along the width direction of the fluidity sample lower mold 110, and the two tensile test bar mold cavities 130 in the same group are symmetrically arranged on both sides of the second runner 141, and one end of the tensile test bar mold cavities 130 in the same group is respectively connected to the second runner 141. The tensile test bar lower mold 130 is provided with a third runner 133 at the lower end corresponding to the second runner 141, and the third runner 133 is aligned with and connected to the second runner 141. That is, the two tensile test bar cavities 130 in the same group are also symmetrically arranged on both sides of the third runner 133 , and one end of the two tensile test bar cavities 130 in the same group are respectively connected to the third runner 133 .

[0058] The second runner 141 has a draft angle of 10-15°. The cross-sectional area of ​​the lower end of the second runner 141 is not less than the cross-sectional area of ​​the third runner 133, which is conducive to mold filling and shrinkage compensation.

[0059] As a preference, the two tensile test bar cavities 131 gradually tilt upward from one end connected to the second runner 141 to one end away from the second runner 141 , so that an angle is formed between the axis of the tensile test bar cavity 131 and the horizontal plane.

[0060] As a further preferred embodiment, the angle between the axis of the tensile test bar cavity 131 and the horizontal plane is 5° to 10°. By properly setting the inclination of the tensile test bar cavity 131, it is helpful to remove the gas in the tensile test bar cavity 131 and have the function of sample shrinkage compensation.

[0061] In this embodiment, the overall shape of the tensile test bar cavity 131 is "bone-shaped", that is, thin in the middle and thick at both ends. The tensile test bar cavity 131 can also be set to a sheet shape or other shapes.

[0062] Two cooling through holes 134 are provided in the extension direction of the tensile test bar cavity 131 in the tensile test bar lower die 130. The cooling through holes 134 are located below the tensile test bar cavity 131 and are used to pass cooling water to cool the sample.

[0063] The pouring cup 153 is opened between the first pouring riser 151 and the second pouring riser 152 , and the height of the cup wall 151 a at the connection between the pouring cup 153 and the first pouring riser 151 is smaller than the height of the cup wall 151 b at the connection between the pouring cup 153 and the second pouring riser 152 .

[0064] As a preferred embodiment, the ratio of the height of the cup wall 151a at the connection between the pouring cup 153 and the first pouring riser 151 to the height of the cup wall 151b at the connection between the pouring cup 153 and the second pouring riser 152 is 0.3 to 0.65. This can ensure that after the spiral cavity 111 is filled, the molten metal still has a little height for shrinkage compensation, and then flows to other cavities behind. If the ratio is too small, there is more molten metal in the pouring cup 153, and the molten metal may flow to the tensile test bar cavity 131 during the fluidity sample filling process, resulting in shunting of the molten metal, affecting the fluidity sample filling, and causing the spiral cavity 111 to be not fully filled; if the ratio is too large, it means that the cup wall 151b at the connection between the pouring cup 153 and the second pouring riser 152 is higher, which is likely to cause the molten metal flowing to the tensile test bar cavity 131 to easily overflow the pouring cup 153; it may also cause unstable filling.

[0065] The triangular sample cavity 154 is provided on the integrated pouring and riser structure 150, and the top of the triangular sample cavity 154 forms the third pouring and riser. The plate-shaped sample cavity 155 is provided on the integrated pouring and riser structure 150, and the top of the plate-shaped sample cavity 155 forms the fourth pouring and riser. The second pouring and riser 152, the third pouring and riser, and the fourth pouring and riser are connected in sequence through the first horizontal runner 156 and the second horizontal runner 157 provided on the integrated pouring and riser structure 150. The inner machined surfaces of the integrated pouring and riser structure 150 are all machined with a draft angle to facilitate demolding.

[0066] The integrated pouring and riser structure 150 is provided with a plurality of temperature measuring through holes 154a spaced from top to bottom on one side corresponding to the triangular specimen cavity 154. Thermocouples are placed in the temperature measuring through holes 154a for measuring the solidification temperature range of the alloy at different thicknesses.

[0067] In this embodiment, the temperature measuring through holes 154a are evenly spaced in the vertical direction, the diameter of the temperature measuring through holes 154a is 1mm to 2mm, and the spacing between adjacent temperature measuring through holes 154a is 8mm to 10mm. The distance between the uppermost temperature measuring through hole 154a and the top of the triangular sample cavity 154 is 1 / 8 of the height of the triangular sample cavity 154; the distance between the lowermost temperature measuring through hole 154a and the bottom of the triangular sample cavity 154 is 1 / 16 of the height of the triangular sample cavity 154.

[0068] The multifunctional gravity integrated casting pouring mold provided by the present invention adopts an integrated pouring and riser structure to introduce high-temperature molten metal into each cavity in turn, thereby realizing the molding of castings of various shapes. First, due to the difference in cup wall height of the pouring cup 153 between the first pouring riser 151 and the second pouring riser 152, the molten metal in the pouring cup 153 preferentially flows into the first pouring riser 151, and then enters the pouring cavity 114 of the fluidity sample lower mold 110 through the first runner 123 of the fluidity sample upper mold 120, thereby filling the fluidity sample; when the fluidity sample is filled, the molten metal in the pouring cup 153 will flow into the second pouring riser 152, and then enter the third runner 133 in the tensile test bar mold lower mold 130 along the second runner 141 of the tensile mold upper mold 140, thereby filling the tensile test bar; while the tensile test bar is being filled, the molten metal flowing through the second pouring riser 152 will also flow through the first cross runner 156 into the triangular sample cavity 154, and then flow through the second cross runner 157 into the plate sample cavity 155 (metallographic sample cavity). Ultimately, it was achieved that four specimens with different functions (fluidity specimen, tensile test bar, triangular specimen and plate specimen) were cast and formed at one time. At the same time, the temperature changes at different points of the triangular specimen were recorded by a data acquisition instrument, and the metal solidification range at different thicknesses could be obtained.

[0069] The present invention can avoid the problem of liquid metal diversion during fluidity testing, which may lead to insufficient fluidity or even insufficient pressure, through reasonable structural design; at the same time, through reasonable setting of the casting path, various casting samples will not interfere with each other, so as to ensure the quality of each sample and ensure that the effect of each experiment is stable and reliable.

[0070] The multifunctional gravity integrated casting mold provided by the present invention integrates the casting molds of the four samples together, and can realize the casting of multiple samples under the same casting conditions, ensure the stability and consistency of the obtained samples, and realize casting and solidification curve testing. It can not only improve the casting efficiency, greatly reduce the use of raw materials, reduce costs, but also reduce carbon emissions, and has significant environmental benefits.

[0071] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multifunctional gravity integrated casting mold, characterized in that: include: The lower die of the fluidity specimen has a spiral cavity on the top; A fluidity sample upper mold, which covers the fluidity sample lower mold; A lower die for the tensile test bar, which abuts against one end of the lower die for the fluidity test sample in the length direction and is fixedly connected to the lower die for the fluidity test sample; A tensile test bar upper die, which is arranged above the tensile test bar lower die; The top of the lower die of the tensile test bar is provided with a plurality of first grooves, and the bottom of the upper die of the tensile test bar is provided with a plurality of second grooves; the second grooves are arranged in one-to-one correspondence with the first grooves, and are combined to form a tensile test bar cavity; An integrated pouring and riser structure, which is detachably connected to the upper die of the tensile test bar; A first pouring and rising gate, which is opened at the top of the pouring and rising gate integrated structure and is connected to the spiral cavity through a first runner opened in the upper mold of the fluidity specimen; A second pouring and rising gate is provided at the top of the pouring and rising gate integrated structure and is connected to the plurality of tensile test bar cavities simultaneously through a second pouring channel provided in the tensile test bar upper mold; A pouring cup is provided between the first pouring riser and the second pouring riser, and a cup wall height at a connection between the pouring cup and the first pouring riser is less than a cup wall height at a connection between the pouring cup and the second pouring riser; A triangular specimen cavity is provided on the integrated pouring and riser structure, and a third pouring and riser is formed on the top of the triangular specimen cavity; A plate-shaped sample cavity is provided on the integrated pouring and riser structure, and a fourth pouring and riser is formed on the top of the plate-shaped sample cavity; Wherein, the second pouring riser, the third pouring riser and the fourth pouring riser are connected in sequence.

2. The multifunctional gravity integrated casting mold according to claim 1, characterized in that: A plurality of lower die through holes are provided in the fluidity sample lower die; the lower die through holes are provided along the width direction of the fluidity sample lower die, and the plurality of lower die through holes are arranged at intervals along the length direction of the fluidity sample lower die; A plurality of upper die through holes are provided in the fluidity sample upper die; the upper die through holes are arranged in parallel with the lower die through holes in a one-to-one correspondence; Wherein, heating tubes are placed in the lower mold through hole and the upper mold through hole.

3. The multifunctional gravity integrated casting mold according to claim 2 is characterized in that: The integrated pouring and riser structure is provided with a plurality of temperature measuring through holes spaced from top to bottom on one side corresponding to the triangular specimen cavity, and thermocouples are placed in the temperature measuring through holes.

4. The multifunctional gravity integrated casting mold according to claim 3 is characterized in that: The cavity wall of the spiral cavity is sprayed with BN coating.

5. The multifunctional gravity integrated casting mold according to claim 3 or 4, characterized in that: A gate cavity is provided on the top of the lower mold of the fluidity specimen, one end of the gate cavity is connected to the first runner, and the other end of the gate cavity is connected to the spiral cavity.

6. The multifunctional gravity integrated casting mold according to claim 5, characterized in that: The first runner is cylindrical and vertically arranged; the gate cavity is cylindrical and coaxially arranged with the first runner; The diameter of the gate cavity is at least 1.5 times the cross-sectional width of the spiral runner, and the first runner has the same diameter as the gate cavity.

7. The multifunctional gravity integrated casting mold according to claim 6, characterized in that: The ratio of the cup wall height at the connection between the pouring cup and the first pouring riser to the cup wall height at the connection between the pouring cup and the second pouring riser is 0.3 to 0.

65.

8. The multifunctional gravity integrated casting mold according to claim 7, characterized in that: The second runner is opened at the center of the upper die of the tensile test bar; the tensile test bar cavities are divided into two groups, and the two groups of tensile test bar cavities are arranged at intervals along the length direction of the lower die of the fluidity test sample; Wherein, each group of tensile test bar cavities includes two tensile test bar cavities; the tensile test bar cavities are arranged along the width direction of the fluidity test specimen lower mold, and the two tensile test bar cavities in the same group are symmetrically arranged on both sides of the second runner and are respectively connected to the second runner.

9. The multifunctional gravity integrated casting mold according to claim 8, characterized in that: The two tensile test bar cavities are gradually inclined upward from one end connected to the second runner to one end away from the second runner, so that an angle is formed between the axis of the tensile test bar cavity and the horizontal plane.

10. The multifunctional gravity integrated casting mold according to claim 9, characterized in that: The angle between the axis of the tensile test bar cavity and the horizontal plane is 5° to 10°.

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