Test bar forming mold

Abstract

A test bar forming mold, comprising a pouring base (20a, 20b) and a forming base (10). The pouring base is internally provided with an accommodating recess (111, 211) and a pouring gate (113, 221) communicated with the accommodating recess. The forming base is arranged in the accommodating recess; the forming base consists of a plurality of core members (101) located on the same circumference; every two adjacent core members match to form a cavity (102) communicated with the pouring gate; and the plurality of cavities are located on a circumference with the pouring gate as the center. The forming mold can reduce the difference among a plurality of test bars formed by one pouring.

Description

Test rod forming mold

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 3, 2023, with application number 202311455920.8. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of casting technology, for example, to a test rod forming mold. Background Art

[0003] Mechanical properties test bars (test bars for short) can be used to understand the tensile strength, flexural strength, hardness, toughness and other performance indicators of materials under different conditions, so as to ensure the quality and reliability of the corresponding components of the material in the engineering field and avoid failures and accidents during use.

[0004] Currently, most metal test bars are cast using a test bar mold, either directly casting the test bar or casting a simple bar material and then machining it into the required size. The mechanical properties and microstructure of the test bar are then tested, observed, and analyzed to determine the mechanical performance level of the metal material.

[0005] In related technologies, the cavities of test bar molds are arranged symmetrically. Most test bar molds are single- or two-piece molds, and a relatively small number of test bars can be molded at once. To meet experimental requirements, multiple rounds of casting are required, resulting in a long test bar casting cycle. Designing a larger number of test bar mold cavities increases the time required for a single casting. Furthermore, the symmetry of the cavities results in significant variations in the molding time for test bars within different cavities of the mold. This, in turn, leads to a wide disparity in the mechanical properties of test bars molded from different cavities, affecting the accuracy of subsequent testing experiments.

[0006] Summary of the Invention

[0007] The present application provides a test bar forming mold to solve the problems in the prior art and reduce the differences between multiple test bars cast in one go.

[0008] The present application provides a test bar forming die, comprising:

[0009] A pouring seat having a receiving groove and a pouring port connected to the receiving groove;

[0010] The molding seat is arranged in the accommodating groove. The molding seat is composed of multiple core pieces located on the same circumference. Two adjacent core pieces cooperate to form a cavity connected to the pouring gate. The multiple cavities are located on a circumference with the pouring gate as the center.

[0011] As an optional solution of the test rod forming mold, the cavity includes a forming part, a connecting part and a buffer part which are sequentially connected from top to bottom, and the buffer part is connected to the pouring gate.

[0012] As an optional solution for the test rod forming mold, the buffer portion includes a transverse channel and a slag collection channel connected at an obtuse angle, the transverse channel extends in a horizontal direction, and the inner end of the transverse channel is connected to the pouring port, and the outer end of the transverse channel is connected to the slag collection channel.

[0013] As an optional solution of the test rod forming mold, the pouring seat further has a steady flow groove, which is located below the cavity and is configured to connect the cavity and the pouring gate.

[0014] As an optional solution for the test rod forming mold, the stabilizing groove is annular, the inner portion of the ring of the stabilizing groove is connected to the pouring gate, and the outer portion of the ring of the stabilizing groove is connected to the mold cavity.

[0015] As an optional solution of the test rod forming mold, the outer side wall of the forming seat is in contact with the inner side wall of the accommodating groove.

[0016] As an optional solution for the test rod forming mold, the casting seat includes a chassis and a flow stabilizing member, the chassis is provided with the accommodating groove, the forming seat is annular, and the flow stabilizing member is located within the annular shape of the forming seat.

[0017] As an optional solution for the test rod forming mold, a first limiting surface is provided on the outer wall of the flow stabilizer, and a second limiting surface is provided on the inner wall of the forming seat, and the second limiting surface cooperates with the first limiting surface and is located above the first limiting surface.

[0018] As an optional solution of the test bar forming mold, the number of the pouring seats is at least two, and the at least two pouring seats include at least one of a first pouring seat and a second pouring seat;

[0019] In the case where the pouring seat includes a first pouring seat, in the first pouring seat, the pouring port is provided on the base plate, the flow stabilizing member is a surrounding wall structure with one end open, the flow stabilizing member is provided on the pouring port with its opening facing the pouring port, and a connecting groove is provided on the flow stabilizing member, and the liquid flowing in from the pouring port flows through the connecting groove and then enters the mold cavity;

[0020] In the case where the pouring seat includes a second pouring seat, in the second pouring seat, the flow stabilizer is a wall structure with openings at both ends, the first end opening cover of the flow stabilizer is arranged on the chassis, and the second end opening forms the pouring port, and a connecting groove is provided on the flow stabilizer and the chassis, a part of the connecting groove is arranged on the flow stabilizer, and the other part of the connecting groove is arranged on the chassis, and the liquid flowing in from the pouring port flows through the connecting groove and enters the mold cavity.

[0021] As an optional solution of the test rod forming mold, there are multiple communicating grooves. When the multiple communicating grooves are provided on the flow stabilizing member, the multiple communicating grooves are arranged at intervals along the circumference of the flow stabilizing member.

[0022] As an optional solution of the test rod forming mold, the test rod forming mold further includes a filter screen, and the filter screen is arranged in the channel from the pouring port to the steady flow groove.

[0023] As an optional solution for the test rod forming mold, the diameter of the pouring port gradually decreases along the flow direction of the molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following is a brief introduction to the drawings required for describing the embodiments of this application.

[0025] FIG1 is a schematic structural diagram of a first test bar forming mold provided in an embodiment of the present application;

[0026] FIG2 is a cross-sectional schematic diagram of a first test bar forming mold provided in an embodiment of the present application;

[0027] FIG3 is an exploded schematic diagram of a first test bar forming mold provided in an embodiment of the present application;

[0028] FIG4 is a bottom view of the flow stabilizing member in FIG3 ;

[0029] FIG5 is a schematic structural diagram of a second test bar forming mold provided in an embodiment of the present application;

[0030] FIG6 is a cross-sectional schematic diagram of a second test bar forming mold provided in an embodiment of the present application;

[0031] FIG7 is an exploded schematic diagram of a second test bar forming mold provided in an embodiment of the present application;

[0032] FIG8 is a bottom view schematically showing the flow stabilizing member in FIG7 .

[0033] Figure numerals: 10, molding seat; 101, core piece; 102, mold cavity; 1021, molding part; 1022, connecting part; 1023, buffer part; 10231, transverse channel; 10232, slag collecting channel; 20a, pouring seat; 11, chassis; 111, receiving groove; 112, flow stabilizing groove; 113, pouring gate; 12, flow stabilizing part; 121, connecting groove; 20b, pouring seat; 21, chassis; 211, receiving groove; 212, flow stabilizing groove; 213, recessed part; 214, connecting groove; 22, flow stabilizing part; 221, pouring gate. DETAILED DESCRIPTION

[0034] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0035] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, for example, in addition to including a series of elements shown in the embodiments of the present application, the process, method, article, or apparatus also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus including the element.

[0036] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0037] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0038] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0039] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0040] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0041] Test bar forming molds are mainly used to form test bars for mechanical property tests. This common test bar forming mold has the following disadvantages: 1) The test bar forming mold has a small number of cavities, and only a small number of test bars can be formed in a single casting. 2) The cavity of the test bar forming mold is formed by a left-right symmetrical inner core. When the number of cavities is large, the molding time and molding conditions of the test bars in different cavities vary greatly, which ultimately affects the mechanical properties of the test bars and makes the accuracy of subsequent test experiments low. 3) During the pouring process, when the molten metal flows, it is easy for small particles to fall from the cavity wall and enter the molten metal, which makes the test bar prone to defects such as air holes and sand inclusions. 4) The test bar molding methods include gravity casting and low-pressure casting. For different molding methods, the test bar molding mold needs to be designed separately, which increases the mold development cost.

[0042] The embodiment of the present application provides a test rod forming mold, which optimizes the test rod forming mold structure and can solve any one or any two or more of the above four problems to meet the needs of technical personnel in the casting field for test rods for mechanical property testing.

[0043] The technical solution of the test rod forming mold is described below with reference to the accompanying drawings and through specific implementation methods.

[0044] This embodiment provides a first test rod forming mold, which can be used for low-pressure casting molding. The details are as follows:

[0045] FIG1 is a schematic structural diagram of the first test bar forming mold provided in this embodiment. FIG2 is a schematic cross-sectional diagram of the first test bar forming mold provided in this embodiment. As shown in FIG1 and FIG2, the first test bar forming mold includes a pouring seat 20a and a forming seat 10. The pouring seat 20a has a receiving groove 111 and a pouring spout 113 connected to the receiving groove 111. The forming seat 10 is disposed within the receiving groove 111 and has a plurality of mold cavities 102 therein. The pouring spout 113 is located below the mold cavities 102. The diameter of the pouring spout 113 gradually decreases along the direction of the molten metal flow. For example, the pouring spout 113 may be in the shape of an inverted cone. During pouring, molten metal is injected through the pouring spout 113 and slowly fills the mold cavities 102 of the forming seat 10 from bottom to top. After the molten metal cools, the mold is removed to obtain a preliminary test bar. The preliminary test bar is then subjected to simple machining to obtain the final test bar. In this embodiment, the forming seat 10 is placed in the receiving groove 111 of the pouring seat 20a, and no other connecting parts are required to fix the forming seat 10 and the pouring seat 20a. Of course, in other embodiments, the forming seat 10 and the pouring seat 20a can also be detachably fixedly connected using connecting parts, which is not limited here.

[0046] Continuing to refer to Figures 1 and 2, the molding seat 10 has multiple cavities 102, and the multiple cavities 102 are arranged on a circle with the pouring gate 113 as the center. In this way, the pouring gate 113 is at an equal distance from each cavity 102 (in theory, but there may be slight differences in practice), so that the molding time and molding conditions of the test rods in each cavity 102 are similar, ensuring that the mechanical properties of each test rod are relatively small, thereby improving the accuracy of subsequent mechanical property test data.

[0047] In this embodiment, the molding seat 10 is composed of a plurality of core pieces 101 arranged in a circular pattern. Adjacent core pieces 101 cooperate to form a mold cavity 102 connected to the pouring port 113. All core pieces 101 have the same structure and size, which makes the core pieces 101 standardized. This not only reduces the manufacturing cost of the molding seat 10, but also allows individual replacements when a core piece 101 is damaged without having to discard the entire molding seat 10, thereby reducing consumable material costs and improving the manufacturing efficiency of the molding seat 10. Of course, in other embodiments, the molding seat 10 can also be an integrated molding structure. Compared with a split molding seat 10, the integrated molding structure has a higher manufacturing cost, but the integrated molding structure also has the advantages of fewer parts and easier assembly.

[0048] It is understood that grooves are provided on both sides of a single core piece 101. The grooves of one core piece 101 cooperate with the grooves of another core piece 101 to form the mold cavity 102, while ensuring that the end faces of the two core pieces 101 are in contact. Due to the general fluidity of the molten metal, when the end faces of two adjacent core pieces 101 are in contact, the molten metal will not overflow from between the two core pieces 101, and no additional sealing structure is required.

[0049] In this embodiment, the number of core pieces 101 is 12, and the 12 core pieces 101 are arranged in a circular pattern. Of course, in other embodiments, the number of core pieces 101 can be any number, which can be specifically designed according to the number of test bars to be molded in a single step, and is not limited here.

[0050] In order to facilitate the positioning of the molding seat 10 as a whole, the outer wall of the molding seat 10 is fitted with the inner wall of the receiving groove 111. When the molding seat 10 is placed in the receiving groove 111 of the casting seat 20a, the individual core pieces 101 are successively placed into the receiving groove 111, and the outer wall of the core piece 101 is fitted with the inner wall of the receiving groove 111, thereby ensuring the positioning and assembly of the core piece 101. In this embodiment, the molding seat 10 is a rotating body, and the outer wall of the molding seat 10 and the receiving groove 111 is circular, and the receiving groove 111 is also set to be circular. Of course, in other embodiments, the outer wall of the molding seat 10 can also be other shapes, which can be designed according to needs and are not limited here.

[0051] FIG3 shows a schematic diagram of the first type of test rod forming mold provided in this embodiment. As shown in FIG3 in conjunction with FIG2 , the casting seat 20a includes a chassis 11, which is provided with a receiving groove 111 and a stabilizing groove 112. The receiving groove 111 is arranged around the circumference of the stabilizing groove 112. The stabilizing groove 112 is annular, and the bottom surface of the stabilizing groove 112 is lower than the bottom surface of the receiving groove 111. The inner portion of the ring of the stabilizing groove 112 is connected to the pouring port 113, and the outer portion of the ring of the stabilizing groove 112 is connected to the mold cavity 102. The pouring port 113, the stabilizing groove 112, and the receiving groove 111 are arranged concentrically. During the pouring process, the molten metal flowing from the pouring port 113 must first enter the stabilizing trough 112. The stabilizing trough 112 can buffer and stabilize the flow rate of the molten metal to prevent splashing, air entrainment, and other phenomena. After the stabilizing trough 112 is filled with molten metal, the molten metal can slowly flow upward into the mold cavity 102. In addition, because the stabilizing trough 112 is annular, the molten metal in the stabilizing trough 112 is a whole, so that the upward flow speed of the molten metal in any direction is consistent, ensuring the injection speed of different mold cavities 102 and reducing the differences in test bars molded in different mold cavities 102.

[0052] In this embodiment, the mold cavity 102 includes a molding portion 1021, a connecting portion 1022 and a buffer portion 1023 that are arranged and connected in sequence. The buffer portion 1023 is connected to the flow stabilizing groove 112. Through the setting of the buffer portion 1023 and the connecting portion 1022, the molten metal can be further buffered to ensure the molding quality of the test rod.

[0053] In this embodiment, the pouring seat 20a also includes a flow stabilizer 12, a pouring port 113 is provided on the chassis 11, the flow stabilizer 12 is a surrounding wall structure with an opening at one end, the flow stabilizer 12 is covered on the pouring port 113 with its opening facing the pouring port 113, and a connecting groove 121 is provided on the flow stabilizer 12. The molten metal flowing in from the pouring port 113 first flows into the flow stabilizer groove 112 through the connecting groove 121, and then enters the buffer part 1023 and the connecting part 1022 of the mold cavity 102, and finally enters the molding part 1021 of the mold cavity 102. After the molten metal cools down, the initial test rod can be obtained.

[0054] Furthermore, the buffer section 1023 includes a horizontally extending transverse channel 10231 and a slag collection channel 10232 connected to the outer end of the transverse channel. The slag collection channel 10232 is arranged at an obtuse angle to the transverse channel 10231, and the connecting section 1022 is connected to the middle of the transverse channel 10231. When the stabilizing trough 112 is filled with molten metal, the molten metal flows into the transverse channel 10231 of the buffer section 1023. At this time, slag that has been washed off by the front end of the molten metal will first flow with the molten metal to the slag collection channel 10232 at the outer edge of the transverse channel 10231. Clean molten metal will then flow along the connecting section 1022 into the forming section 1021, slowly filling the mold from bottom to top.

[0055] In this embodiment, the molding base 10 is annular and can be placed in the receiving groove 111 of the base 11. The flow stabilizer 12 is located in the center of the annular shape of the molding base 10, and the centerline of the flow stabilizer 12 coincides with the centerline of the molding base 10. The centerline of the flow stabilizer 12 coincides with the centerline of the pouring gate 113, ensuring that the pouring gate 113 is the same distance from each cavity 102 in the molding base 10.

[0056] The outer wall of the flow stabilizer 12 is provided with a first limiting surface, and the inner wall of the forming seat 10 is provided with a second limiting surface. The second limiting surface cooperates with and is located above the first limiting surface. In this manner, the forming seat 10 limits the flow stabilizer 12, ensuring that the flow stabilizer 12 remains stable during pouring. It will be appreciated that the forming seat 10 is relatively large and heavy, and the second limiting surface of the forming seat 10 presses against the first limiting surface of the flow stabilizer 12, ensuring that the flow stabilizer 12 remains stable during pouring of the molten metal.

[0057] In this embodiment, the flow stabilizer 12 is a body of revolution, with a stepped surface on its outer sidewall forming a first limiting surface. A boss is formed on the inner sidewall of the forming seat 10, with the lower surface of the boss forming a second limiting surface. Each core member 101 of the forming seat 10 has a protrusion structure on its inner sidewall, and the protrusion structures of all core members 101 engage and cooperate to form a boss.

[0058] When assembling the test rod forming mold, the flow stabilizer 12 is first assembled to the chassis 11, and then the multiple core pieces 101 are assembled in sequence. This can effectively avoid sand rubbing during the assembly of the core pieces 101, which would cause sand holes to form inside the test rod, and also speed up the assembly speed.

[0059] The test rod forming mold also includes a filter screen. A filter screen is provided in the flow channel between the pouring port 113 and the cavity 102. The filter screen can filter out fine slag inclusions in the molten metal, ensuring that the clean molten metal can flow smoothly and evenly into the flow stabilizing groove 112, and then flow into the cavity 102 of the forming seat 10. The filter screen is installed at a position where the pouring port 113 flows into the flow stabilizing member 12, thereby filtering the molten metal entering the flow stabilizing member 12, to ensure that there are no impurities or fewer impurities in the molten metal entering the flow stabilizing groove 112 and the cavity 102, thereby improving the molding quality of the test rod. The filter screen can be a ceramic filter screen, or a filter screen made of other high-temperature resistant materials, which is not limited here.

[0060] FIG4 shows a bottom view of the flow stabilizer 12 in FIG3 . As shown in FIG4 in conjunction with FIG2 , the flow stabilizer 12 includes multiple connecting grooves 121, which are spaced apart on the bottom end surface of the flow stabilizer 12 around the circumference of the flow stabilizer 12. In this embodiment, the connecting grooves 121 do not penetrate the sidewalls of the flow stabilizer 12. Instead, the connecting grooves 121 are partially located above the flow stabilizer 112. After the molten metal enters the pouring port 113, it flows toward the connecting grooves 121 and then into the flow stabilizer 112. Of course, in other embodiments, the connecting grooves 121 can also penetrate the sidewalls of the flow stabilizer 12. Alternatively, the connecting grooves 121 can be provided on the chassis 11 to facilitate the molten metal flowing from the pouring port 113 to enter the flow stabilizer 112 through the connecting grooves 121. In this case, a mounting surface for a filter screen is required on the chassis 11, and the filter screen is positioned lower than the connecting grooves 121 to ensure that the filter screen can effectively filter the molten metal flowing into the flow stabilizer 112.

[0061] In this embodiment, a pouring port 113 is provided on the base 11 of the casting seat 20a. The base 11 also includes a receiving groove 111 and a flow stabilizing groove 112. The forming seat 10 is mounted within the receiving groove 111 and positioned above the base 11. Based on the assembly of the base 11 and the forming seat 10, the pouring port 113 is positioned below the position of the mold cavity 102 within the forming seat 10. This casting seat 20a is suitable for low-pressure casting. When casting the test bars in this first type of test bar forming mold, a certain pressure must be applied to the molten metal to ensure that the molten metal completely fills the mold cavity 102 of the forming seat 10.

[0062] This embodiment also provides a second test bar forming mold, which can be used for gravity casting molding. The details are as follows:

[0063] Figure 5 shows a schematic structural diagram of the second test bar forming mold provided in this embodiment. Figure 6 shows a cross-sectional view of the second test bar forming mold provided in this embodiment. As shown in Figures 5 and 6, the second test bar forming mold includes a pouring base 20b and a forming base 10. The pouring base 20b has a receiving groove 211 and a pouring spout 221 connected to the receiving groove 211. The forming base 10 is disposed within the receiving groove 211 and has a plurality of mold cavities 102 therein. The inlet of the pouring spout 221 is not lower than the highest point of the mold cavity 101. The diameter of the pouring spout 221 gradually decreases along the direction of the molten metal flow. For example, the pouring spout 221 can be conical. During pouring, molten metal is injected through the pouring spout 221. The molten metal first flows downward and then slowly fills the mold cavity 102 of the forming base 10 from the bottom up. After the molten metal cools, the mold is removed to obtain a preliminary test bar. The preliminary test bar is then subjected to simple machining to obtain the final test bar.

[0064] The second test bar forming mold has the same basic inventive concept as the first test bar forming mold, and the forming seat 10 of the second test bar forming mold has the same structure as the forming seat 10 of the first test bar forming mold, which will not be repeated here.

[0065] The main difference between the second test bar forming mold and the first test bar forming mold is that the structure of the pouring seat 20b is different. The pouring seat 20b of the second test bar forming mold is suitable for gravity pouring.

[0066] Figure 7 shows an exploded schematic diagram of the second test bar forming mold shown in Figure 5 . Figure 8 is a bottom-up schematic diagram of the flow stabilizer shown in Figure 7 . As shown in Figures 7 and 8 in conjunction with Figure 6 , the casting base 20b includes a base 21 and a flow stabilizer 22. The base 21 is provided with a receiving groove 211 and a flow stabilizer 212. A pouring port 221 is formed by the flow stabilizer 22, rather than being provided on the base 11 as in the first test bar forming mold. The flow stabilizer 22 is a wall structure with two openings. The first end of the flow stabilizer 22 is covered by the base 21, while the second end forms the pouring port 221. A connecting groove 214 is provided on the base 21. Molten metal flowing from the pouring port 221 flows through the connecting groove 214, then into the flow stabilizer 212, and finally into the mold cavity 102. The pouring port 221 formed by the flow stabilizer 22 is not lower than the upper end surface of the forming base 10 to facilitate the pouring of the molten metal.

[0067] A recess 213 is provided on the chassis 21 opposite the flow stabilizer 22 to cushion the molten metal flowing from the pouring port 221 to prevent it from impacting the forming seat 10 at high speed. A connecting groove 214 is provided slightly above the peripheral wall of the recess 213, extending through the peripheral wall of the recess 213. The molten metal enters the flow stabilizer 212 through the connecting groove 214.

[0068] Based on the structure of the chassis 21, the filter screen needs to be set above the connecting groove 214 of the chassis 21 to filter the molten metal flowing in from the pouring port 221, so as to ensure that the molten metal entering the recess 213 of the chassis 21 and the steady flow groove 212 is filtered through the filter screen, thereby improving the molding quality of the test rod.

[0069] Optionally, in the case of gravity casting, a portion of the communication groove 214 is provided on the flow stabilizing member 22 , and another portion of the communication groove 214 is provided on the chassis 21 .

[0070] In summary, it can be understood that the test rod forming mold can have two types of casting seats, namely casting seat 20a and casting seat 20b. The number of casting seats 20a can be multiple, and the sizes of the multiple casting seats 20a can vary. The number of casting seats 20b can be multiple, and the sizes of the multiple casting seats 20b can vary. The forming seat 10 can be compatible with different types of casting seats through the receiving groove on the casting seat to achieve low-pressure pouring or gravity pouring. The difference between gravity pouring and low-pressure pouring lies primarily in the height relationship between the pouring gate and the mold cavity. When the pouring gate is not lower than the mold cavity, gravity pouring is generally selected; when the pouring gate is lower than the mold cavity, low-pressure pouring is generally selected. By providing receiving grooves that match the forming seat on different types of casting seats, the forming seat can be used for both gravity pouring and low-pressure pouring, thereby improving the standardization of the test rod forming mold and reducing the development cost of different molds.

[0071] The first test rod forming mold and the second test rod forming mold provided in this embodiment have the following advantages: 1) By designing the test rod forming mold to be composed of a pouring seat and a forming seat 10, the forming seat 10 can be installed through the receiving groove on the pouring seat, so that it is only necessary to design a receiving groove that cooperates with the forming seat 10 on different types of pouring seats, so that the forming seat 10 can be matched with a pouring seat suitable for gravity pouring or with a pouring seat suitable for low-pressure pouring, thereby improving the versatility of the forming seat 10 and reducing the research and development cost of the mold. 2) By setting the forming seat 10 to be composed of a plurality of core pieces 101 arranged along the same circumference, and the two adjacent core pieces 101 can cooperate to form a cavity 102, the number of core pieces 101 required can be selected according to the number of test rods to be molded, thereby increasing the number of test rods molded in a single pouring. 3) The mold cavities 102 of the molding base 10 are arranged in a circular pattern with the pouring gate 221 as the center. This ensures similar molding conditions for test bars within different mold cavities 102, minimizing variability in the resulting test bars and ensuring accurate and reliable output data and test analysis conclusions. 4) A filter screen installed at the pouring gate 221 filters the molten metal, reducing defects such as pores and sand inclusions while also facilitating smooth flow of the molten metal.

[0072] The test bar forming mold provided in this embodiment can also be other combinations of the first test bar forming mold and the second test bar forming mold, which are not described one by one here. The molten metal can be molten aluminum or other molten metals, which are not limited here.

[0073] Note that, throughout this specification, references to terms such as "one embodiment" and "another embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be incorporated in any suitable manner in any one or more embodiments or examples.

Claims

1. A test bar forming die, comprising: A pouring seat, comprising a receiving groove and a pouring port connected to the receiving groove; A molding seat is arranged in the accommodating groove. The molding seat is composed of a plurality of core pieces located on the same circumference. Two adjacent core pieces cooperate to form a cavity connected to the pouring port. The plurality of cavities are located on a circumference with the pouring port as the center.

2. The test bar forming die according to claim 1, wherein: The mold cavity comprises a molding part, a communicating part and a buffer part which are sequentially connected from top to bottom, and the buffer part is connected with the pouring port.

3. The test bar forming die according to claim 2, wherein: The buffer portion includes a transverse channel and a slag collecting channel connected at an obtuse angle, the transverse channel extends in a horizontal direction, the inner end of the transverse channel is connected to the pouring port, and the outer end of the transverse channel is connected to the slag collecting channel.

4. The test bar forming die according to claim 1, wherein: The pouring seat also has a flow stabilizing groove, which is located below the mold cavity and is configured to connect the mold cavity and the pouring port.

5. The test bar forming die according to claim 4, wherein: The stabilizing groove is annular, the inner part of the ring of the stabilizing groove is connected with the pouring port, and the outer part of the ring of the stabilizing groove is connected with the mold cavity.

6. The test bar forming die according to claim 1, wherein: The outer side wall of the forming seat is in contact with the inner side wall of the containing groove.

7. The test bar forming mold according to any one of claims 1 to 6, wherein: The pouring seat comprises a chassis and a flow stabilizing member, the chassis is provided with the accommodating groove, the molding seat is annular, and the flow stabilizing member is located in the annular shape of the molding seat.

8. The test bar forming die according to claim 7, wherein: A first limiting surface is provided on the outer wall of the flow stabilizing member, and a second limiting surface is provided on the inner wall of the forming seat. The second limiting surface cooperates with the first limiting surface and is located above the first limiting surface.

9. The test bar forming die according to claim 7, wherein: The number of the pouring seats is at least two, and the at least two pouring seats include at least one of a first pouring seat and a second pouring seat; In the case where the pouring seat includes a first pouring seat, in the first pouring seat, the pouring port is provided on the chassis, the flow stabilizing member is a surrounding wall structure with an opening at one end, the flow stabilizing member is provided on the pouring port with its opening facing the pouring port, and a connecting groove is provided on the flow stabilizing member, and the liquid flowing in from the pouring port flows through the connecting groove and then enters the mold cavity; In the case where the pouring seat includes a second pouring seat, in the second pouring seat, the flow stabilizing member is a surrounding wall structure with openings at both ends, the first end opening of the flow stabilizing member is covered on the chassis, and the second end opening forms the pouring port, and a connecting groove is provided on the flow stabilizing member and the chassis, and the connecting groove is A part of the connecting groove is arranged on the flow stabilizing member, and another part of the connecting groove is arranged on the bottom plate. The liquid flowing in from the pouring port flows through the connecting groove and then enters the mold cavity.

10. The test bar forming die according to claim 9, wherein: There are multiple communicating grooves. When the multiple communicating grooves are arranged on the flow stabilizer, the multiple communicating grooves are arranged at intervals along the circumferential direction of the flow stabilizer.

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