A concrete sample casting mold

Abstract

The utility model relates to a kind of concrete sample pouring mould, including upper mould plate, is formed by two groups of upper petal mould, the upper forming mould cavity of one end of forming concrete sample is formed between the closure of two groups of upper petal mould, middle mould plate is formed by two groups of middle petal mould, the middle forming mould cavity of forming concrete test middle section is formed between the closure of two groups of middle petal mould, lower mould plate is formed by two groups of lower petal mould, the lower forming mould cavity of another end of forming concrete test is formed between the closure of two groups of lower petal mould, upper mould plate, middle mould plate and lower mould plate are sequentially adhered in up-down direction, and the length size of middle mould plate's middle forming mould cavity is adjustable, when the test piece of different middle section length needs to be prepared, the whole mould is not needed to be replaced, just need to adjust the length of middle mould plate's middle forming mould cavity or replace the middle mould plate component of adaptive length, reduce the overall manufacturing quantity of mould. Modular structure reduces the storage amount of idle mould, reduces the cost of mould maintenance, rust prevention and scrapping replacement, compresses the comprehensive cost of test piece preparation.

Description

Technical Field

[0001] This utility model relates to the field of concrete sample forming technology, and in particular to a concrete sample casting mold. Background Technology

[0002] In the field of mechanical property testing of concrete materials, dumbbell-shaped concrete specimens are standard samples for evaluating key indicators such as tensile strength and flexural properties of materials. Their special structural design of "large diameter at both ends and small diameter in the middle section" ensures that stress is concentrated in the weak middle section during the test, accurately obtaining the mechanical parameters of the material when it fails under stress. Therefore, they are widely used in the concrete quality testing process in fields such as building engineering, roads and bridges. Currently, the molding of dumbbell-shaped concrete specimens mainly relies on two sets of molding petal molds. The specific process is as follows: the inner sides of both sets of petal molds are prefabricated with semi-mold cavities that match the dumbbell-shaped specimen. During molding, the mold cavity surfaces of the two sets of petal molds are first precisely fitted together, and the petal molds are fixed and sealed by connecting parts such as positioning pins and bolts to form a complete dumbbell-shaped closed mold cavity. Then, a well-mixed concrete slurry is poured into the mold cavity. After the concrete has completed its initial setting and final setting and solidification, the connecting parts are removed and the two sets of molding petal molds are separated to obtain a dumbbell-shaped concrete specimen that meets the testing requirements. However, in actual testing, depending on the testing standards for different engineering scenarios (such as GB / T 50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete"), various models of dumbbell-shaped concrete specimens are required. The core difference between these models lies in the length of the middle section. Because the mold cavity structure of traditional forming petal molds is an integrated and fixed design, the length of the middle section is inseparable from the petal mold body. This means that for specimens with different middle section lengths, forming petal molds of corresponding sizes must be fabricated separately. This "one model, one mold" approach has significant technical drawbacks: on the one hand, it requires a large investment in the design, processing, and raw material procurement of molds of different sizes, especially for testing scenarios involving small batches and multiple models of specimens, where mold manufacturing costs account for a very high proportion of the overall testing costs; on the other hand, the storage and maintenance of multiple sets of molds require additional space and manpower, and the molds are prone to rust and deformation when idle, which further increases the overall cost of specimen preparation and makes it difficult to meet the needs of efficient and low-cost testing of concrete mechanical properties. Utility Model Content

[0003] The purpose of this utility model is to provide a concrete sample casting mold, which aims to solve the defects of the concrete sample casting mold in the above-mentioned technical problems. A single mold can form multiple sets of concrete samples of different types, thereby reducing the production cost of the samples.

[0004] The technical solution adopted in this utility model is as follows: A concrete sample casting mold, comprising: The upper template consists of two sets of upper petal molds, which are interlocked and form an upper forming mold cavity at one end of the concrete sample. The intermediate template consists of two sets of intermediate lobe molds, which are interlocked and form the intermediate forming mold cavity of the intermediate section of the concrete test. The lower template consists of two sets of lower petal molds, which are interlocked and form the lower forming mold cavity at the other end of the concrete test. The upper template, middle template, and lower template are sequentially attached in the vertical direction, and the length of the middle forming cavity of the middle template is adjustable.

[0005] This utility model also has the following technical features: In one embodiment of this utility model, multiple sets of the middle templates are arranged in the vertical direction, and the height dimensions of the middle forming cavity of the multiple sets of middle templates are the same or different.

[0006] In one embodiment of this utility model, a leak-proof bottom plate is provided below the lower forming cavity of the lower template.

[0007] In one embodiment of this utility model, the edges of the snapping surfaces of the two sets of upper lobe molds are respectively provided with first threaded holes, and the first threaded holes of the two sets of upper lobe molds are fixed together by a first screw.

[0008] In one embodiment of this utility model, the edges of the fastening surfaces of the two sets of upper lobe molds are respectively provided with a first positioning hole and a first positioning pin, and the first positioning hole and the first positioning pin form an insertion or separation engagement.

[0009] In one embodiment of this utility model, the edges of the snapping surfaces of the two sets of middle lobe molds are respectively provided with second threaded holes, and the second threaded holes of the two sets of middle lobe molds are fixed together by a second screw.

[0010] In one embodiment of this utility model, the edges of the snapping surfaces of the two sets of middle lobe molds are respectively provided with a second positioning hole and a second positioning pin, and the second positioning hole and the second positioning pin form an insertion or separation engagement.

[0011] In one embodiment of this utility model, the edges of the snap-fit ​​surfaces of the two sets of lower molds are respectively provided with third threaded holes, and the third threaded holes of the two sets of lower molds are fixed together by a third screw.

[0012] In one embodiment of this utility model, the edges of the snap-fit ​​surfaces of the two sets of lower flap molds are respectively provided with a third positioning hole and a third positioning pin, and the third positioning hole and the third positioning pin form an insertion or separation fit.

[0013] In one embodiment of this utility model, the upper template, the middle template and the lower template are connected by vertical positioning holes and vertical positioning pins, respectively.

[0014] Compared with existing technologies, the beneficial effects of this utility model are reflected in the following: This mold, through its modular design of upper, middle, and lower templates, disassembles the specimen molding structure into an end section (upper molding cavity and lower molding cavity) and a middle section (middle molding cavity). The length of the middle molding cavity of the middle template is adjustable. When specimens with different middle section lengths need to be prepared, it is not necessary to replace the entire mold set; only the length of the middle molding cavity of the middle template needs to be adjusted or a middle template component of suitable length needs to be replaced, significantly reducing the overall number of molds required. At the same time, the modular structure reduces the storage of idle molds, lowers the costs of mold maintenance, rust prevention, and replacement, and significantly reduces the overall cost of specimen preparation. Attached Figure Description

[0015] Figure 1 This is a front view of a concrete sample casting mold in one embodiment of the present invention; Figure 2 This is a front view of the upper lobe mold in one embodiment of the present invention; Figure 3 This is a front view of one type of the middle lobe mold in one embodiment of the present invention; Figure 4 This is a front view of the upper and lower lobe mold in one embodiment of the present invention; Figure 5 This is a plan view of the upper template in one embodiment of the present invention; Figure 6 This is a plan view of the template in one embodiment of the present invention; Figure 7 This is a plan view of the lower template in one embodiment of the present invention; Figure 8 and Figure 9 These are front views of two different models of the middle lobe mold in one embodiment of this utility model; Detailed Implementation

[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0017] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] It should be noted that: because the mold cavity structure of traditional forming petal molds is an integrated and fixed design, the length of the middle section is inseparable from the petal mold body. This means that for specimens with different middle section lengths, forming petal molds of corresponding sizes must be manufactured separately. This "one model, one mold" approach has significant technical drawbacks: on the one hand, it requires a large investment in the design, processing, and raw material procurement of petal molds of different sizes, especially for testing scenarios involving small batches and multiple models of specimens, where mold manufacturing costs account for a very high proportion of the overall testing cost; on the other hand, the storage and maintenance of multiple sets of molds require additional space and manpower, and the molds are prone to corrosion and deformation when idle, leading to scrapping, further increasing the overall cost of specimen preparation. This makes it difficult to meet the needs of efficient and low-cost concrete mechanical property testing. To solve the problems existing in forming molds, this utility model proposes a concrete sample casting mold, including: an upper template 1. The upper template 10, middle template 20, and lower template 30 are sequentially fitted together in the vertical direction, and the length of the middle template 20's middle forming cavity 211 is adjustable.

[0019] In one embodiment, see Figure 1 The upper template 10, the middle template 20 and the lower template 30 are all made of polymethyl methacrylate (acrylic) material.

[0020] In one embodiment, see Figure 1 The middle template 20 is arranged in multiple sets in the vertical direction, and the height dimensions of the middle forming cavity 211 of the multiple sets of middle templates 20 are the same or different.

[0021] In one embodiment, two sets of middle templates 20 are arranged vertically. The two sets of middle templates 20 are formed by four middle lobe molds 21 snapping together. The shape and size of the middle forming cavity 211 formed by the four middle lobe molds 21 are exactly the same, and it is used to form the middle part of the dumbbell-shaped specimen.

[0022] In one embodiment, see Figure 3 , Figure 8 and Figure 9 The height of the forming cavity 211 is 10mm, 15mm or 20mm.

[0023] In one embodiment, the upper molding cavity 111 is a truncated cone with a smaller lower end, the middle molding cavity 211 is cylindrical, and the lower molding cavity 311 is a truncated cone with a smaller upper end.

[0024] In one embodiment, see Figure 4 To prevent the leakage of cement slurry poured into the mold cavity, a leak-proof bottom plate 32 is provided below the lower mold cavity 311 of the lower template 30.

[0025] In one embodiment, see Figure 5 To ensure the connection and disassembly of the two sets of upper lobe molds 11, the edges of the fastening surfaces of the two sets of upper lobe molds 11 are respectively provided with first threaded holes 12, and the first threaded holes 12 of the two sets of upper lobe molds 11 are fixed together by a first screw 13.

[0026] In one embodiment, see Figure 2 To ensure the positioning connection between the two sets of upper lobe molds 11, the edges of the fastening surfaces of the two sets of upper lobe molds 11 are respectively provided with a first positioning hole 14 and a first positioning pin 15, and the first positioning hole 14 and the first positioning pin 15 form an insertion or separation engagement.

[0027] Similarly, to ensure the connection and disassembly between the two sets of middle lobe molds 21, the edges of the fastening surfaces of the two sets of middle lobe molds 21 are respectively provided with second threaded holes 22, and the second threaded holes 22 of the two sets of middle lobe molds 21 are fixed together by the second screw 23.

[0028] To ensure the positioning connection between the two sets of middle lobe molds 21, the edges of the fastening surfaces of the two sets of middle lobe molds 21 are respectively provided with a second positioning hole 24 and a second positioning pin 25, and the second positioning hole 24 and the second positioning pin 25 form an insertion or separation engagement.

[0029] To ensure the connection and disassembly between the two sets of lower petal molds 31, the edges of the fastening surfaces of the two sets of lower petal molds 31 are respectively provided with third threaded holes 33, and the third threaded holes 33 of the two sets of lower templates 30 are fixed together by third screws 34.

[0030] To ensure the positioning connection between the two sets of lower lobe molds 31, the edges of the fastening surfaces of the two sets of lower lobe molds 31 are respectively provided with a third positioning hole 35 and a third positioning pin 36, and the third positioning hole 36 and the third positioning pin 36 form an insertion or separation fit.

[0031] In one embodiment, the upper template 10, the middle template 20, and the lower template 30 are connected by vertical positioning holes and vertical positioning pins, respectively.

[0032] The mating surface between the upper template 10 and the middle template 20 is provided with a first vertical positioning hole 41 and a first vertical positioning pin 42, and the mating surface between the middle template 20 and the lower template 30 is provided with a second vertical positioning hole 43 and a second vertical positioning pin 44.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concrete sample casting mold, characterized in that, include: The upper template (10) is composed of two sets of upper petal molds (11), which are fastened together and form an upper forming mold cavity (111) at one end of the forming concrete sample. The middle template (20) is composed of two sets of middle petal molds (21), which are fastened together and form the middle forming mold cavity (211) of the middle section of the forming concrete test. The lower template (30) is composed of two sets of lower petal molds (31), which are fastened together and form the lower forming mold cavity (311) at the other end of the forming concrete test. The upper template (10), middle template (20) and lower template (30) are sequentially attached in the vertical direction, and the length of the middle forming cavity (211) of the middle template (20) is adjustable.

2. The concrete sample casting mold according to claim 1, characterized in that, The middle template (20) is arranged in multiple sets in the vertical direction, and the height dimensions of the middle forming cavity (211) of the multiple sets of middle templates (20) are the same or different.

3. The concrete sample casting mold according to claim 1, characterized in that, A leak-proof bottom plate (32) is provided below the lower forming cavity (311) of the lower template (30).

4. The concrete sample casting mold according to claim 1, characterized in that, The two sets of upper petal molds (11) have first threaded holes (12) on their snap-fit ​​surfaces respectively, and the first threaded holes (12) of the two sets of upper petal molds (11) are fixed together by the first screw (13).

5. The concrete sample casting mold according to claim 4, characterized in that, The two sets of upper lobe molds (11) are respectively provided with a first positioning hole (14) and a first positioning pin (15) on the edge of the fastening surface. The first positioning hole (14) and the first positioning pin (15) form an insertion or separation fit.

6. The concrete sample casting mold according to claim 1, characterized in that, The two sets of middle lobe molds (21) have second threaded holes (22) on their snap-fit ​​surfaces respectively, and the two sets of middle lobe molds (21) are fixed together by the second screw (23).

7. The concrete sample casting mold according to claim 6, characterized in that, The two sets of middle lobe molds (21) are respectively provided with a second positioning hole (24) and a second positioning pin (25) on the edge of the fastening surface. The second positioning hole (24) and the second positioning pin (25) form an insertion or separation fit.

8. The concrete sample casting mold according to claim 1, characterized in that, The two sets of lower mold plates (31) have a third threaded hole (33) on the edge of the fastening surface, and the two sets of lower mold plates (30) are fixed together by a third screw (34).

9. The concrete sample casting mold according to claim 8, characterized in that, The two sets of lower flap molds (31) are respectively provided with a third positioning hole (35) and a third positioning pin (36) on the edge of the fastening surface. The third positioning hole (35) and the third positioning pin (36) form an insertion or separation fit.

10. The concrete sample casting mold according to claim 1, characterized in that, The upper template (10) and the middle template (20) are provided with a first vertical positioning hole (41) and a first vertical positioning pin (42) on the joint surface. The middle template (20) and the lower template (30) are provided with a second vertical positioning hole (43) and a second vertical positioning pin (44) on the joint surface.

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