Die for lossless manufacturing of heat conductivity coefficient sample
By designing a mold to make thermal conductivity samples without loss, using components such as nested fixed members and telescopic members, the problems of difficulty in slurry and mold removal in existing molds are solved, and efficient and lossless sample molding and mold removal processes are achieved.
Patent Information
- Application Number
- CN202420795796.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The existing thermal conductivity sample production molds have difficulties in slurry and demolding, resulting in failure in sample production and high rework rate.
A mold for making thermal conductivity samples without loss was designed. The cavity for casting slurry is formed by combining nesting fixing members, convex cast steel plates, cast bases and pressure-bearing bases, and the slow mold release of the slurry is achieved by using telescopic members and pressure-bearing pads.
By reducing the contact area between the sample and the mold, the damage risk during demoulding is reduced, and the molding rate of the thermal conductivity sample is improved. It is simple to operate and convenient to demould.
Smart Images
Figure CN222689506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal insulation materials for mining, in particular to a mould for non-destructively manufacturing thermal conductivity coefficient samples. Background Art
[0002] Mine insulation materials are one of the effective ways to deal with deep well heat damage. In the research and development of mine insulation materials, in order to study the thermal conductivity, the insulation materials are usually made into rectangular thin plate samples through prefabricated molds, and then measured using a thermal conductivity meter.
[0003] However, in actual application, there are usually two problems: First, the mold for making thermal conductivity samples is immature. Currently, the commonly used mold is a rectangular strip frame made of plastic. During the casting process of the sample, the slurry often leaks due to poor sealing, resulting in sample production failure; second, demolding is difficult. When demolding an integrated mold, the sample is often damaged due to excessive adhesion and poor operability. The damage is usually manifested in the following forms: (1) during demolding, the surface of the sample is damaged due to improper human operation; (2) after demolding, part of the sample is still attached to the mold, resulting in an incomplete sample; (3) the sample breaks directly in the middle. The above three problems undoubtedly increase the rework rate of the sample and reduce work efficiency.
[0004] In the prior art, a combined mold in a method for making a thermal conductivity test mold is used to demould the sample by disassembling the mold after the sample is formed. However, after demoulding, a large area of the sample will still adhere to the mold, causing the sample to be damaged.
[0005] In view of this, it is necessary to design a mold for non-destructively making thermal conductivity specimens to solve the above problems. Utility Model Content
[0006] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a mold for non-destructively manufacturing thermal conductivity samples, which reduces the large-area contact between the sample plate surface and the mold and reduces the susceptibility of the sample to damage or breakage during demoulding, thereby increasing the molding rate of the thermal conductivity sample.
[0007] To achieve the above-mentioned purpose, the utility model provides a mold for non-destructively making thermal conductivity coefficient specimens, including: a nested fixing component, a "convex" casting steel plate connected to the nested fixing component, a casting base connected to the "convex" casting steel plate, and a pressure-bearing base connected to the casting base.
[0008] Furthermore, the pressure-bearing base includes a pressure-bearing steel plate, a plurality of telescopic members placed on the pressure-bearing steel plate, and a pressure pad sleeved on the telescopic members; the telescopic members are evenly distributed on the pressure-bearing steel plate in a plumb state.
[0009] Furthermore, the nested fixing member includes a plurality of steel bars.
[0010] Furthermore, the "convex" shaped casting steel plate includes several long steel plates; the cross-section of the long steel plates is half "convex" shaped; the top of the "convex" shaped casting steel plate is connected to the nested fixing component; the bottom of the "convex" shaped casting steel plate is connected to the casting base.
[0011] Furthermore, the casting base is made of a steel plate, and is provided with a groove for clamping the "convex" shaped casting steel plate; a plurality of circular holes are evenly distributed on the casting base; the number of circular holes on the casting base is the same as the number of telescopic members; and the plurality of circular holes on the casting base are directly opposite to the positions of the plurality of telescopic members.
[0012] Furthermore, the pressure pad includes a plurality of semi-annular steel pipes; the radius of the inner ring of the semi-annular steel pipe is equal to the radius of the cross section of the telescopic member, and the semi-annular steel pipe is sleeved on the telescopic member.
[0013] Furthermore, the height of the telescopic member is equal to the sum of the height of the pressure pad and the height of the circular hole on the casting base.
[0014] Furthermore, the diameter of the cross section of the telescopic member is equal to the diameter of the circular hole on the casting base; the diameter of the cross section of the telescopic member is less than or equal to 30 mm; and the number of the telescopic members is not less than four.
[0015] Furthermore, the telescopic member is used to connect the casting base with the pressure-bearing base.
[0016] The beneficial effects of the utility model are:
[0017] 1. The mold for non-destructively making thermal conductivity test specimens provided by the utility model forms a cavity for pouring slurry by formulating a "convex" casting steel plate connected to a nested fixed component, a casting base connected to the "convex" casting steel plate, and a pressure-bearing base connected to the casting base; wherein a plurality of telescopic components and a pressure-bearing pad for connecting the casting base are arranged on the pressure-bearing steel plate of the pressure-bearing base; thus, after the pouring slurry is formed, the nested fixed components, a plurality of long steel plates with a semi-convex cross-section, and the pressure-bearing pad are sequentially disassembled; then the pouring base is gently pressed, at which time the telescopic components on the pressure-bearing base will slowly lift the solidified slurry upward, so that the solidified slurry can slowly separate from the pouring base; after the solidified slurry is completely separated from the pouring base, the solidified slurry on the telescopic components is removed, and perfect demoulding can be achieved. In this way, one side is free of restraint and is directly exposed to the air to form naturally without contacting the mold, which reduces the demoulding workload; the other side is in contact with the casting base, and by removing the pressure pad on the pressure base, the telescopic member slowly lifts the solidified slurry upward, so that the solidified slurry slowly separates from the casting base; finally, only the solidified slurry is in contact with the telescopic member on the pressure base; such a small area of contact can be easily demoulded. This method has the advantages of simple process, convenient operation, stability and flexibility, and convenient demoulding, which greatly improves the forming rate of making thermal conductivity test specimens.
[0018] 2. The utility model provides a mold for non-destructive production of thermal conductivity test specimens. By keeping the height of the telescopic member equal to the sum of the height of the pressure pad and the height of the circular hole on the casting base, it is ensured that when the pressure base, the casting base and the pressure pad are connected by the telescopic member, the telescopic member has no exposed part, so that the casting base is sufficiently flat. When the casting slurry is formed and disassembled to only the casting base and the pressure base, the casting base can be gently pressed, and then the telescopic member on the pressure base will slowly lift the solidified slurry upward, so that the solidified slurry can slowly separate from the casting base, thereby reducing the contact area between the slurry and the mold during demolding. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model is a schematic structural diagram of a mold for non-destructively manufacturing thermal conductivity test specimens.
[0020] Figure 2 The utility model is a schematic structural diagram of a mold for non-destructively manufacturing a thermal conductivity sample in an exploded state.
[0021] Figure 3 The utility model is used to non-destructively manufacture the thermal conductivity sample using the mold for the thermal conductivity sample.
[0022] Reference numerals
[0023] 1-nested fixing member; 2-convex cast steel plate; 21-top of the convex cast steel plate; 22-bottom of the convex cast steel plate; 3-casting base; 31-circular hole; 32-groove; 4-thermal conductivity test piece; 5-pressure base; 51-telescopic member; 52-pressure steel plate; 53-pressure pad. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
[0025] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted. In addition, it should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0026] like Figures 1-2 As shown, the utility model provides a mold for non-destructively making thermal conductivity test specimens, comprising: a nested fixing component 1, a "convex" shaped casting steel plate 2 connected to the nested fixing component 1, a casting base 3 connected to the "convex" shaped casting steel plate 2, and a pressure-bearing base 5 connected to the casting base 3.
[0027] The nested fixing component 1 includes a plurality of steel bars, which form a rectangular frame with a hollow interior.
[0028] The casting base 3 is made of a rectangular steel plate, and is provided with a groove 32 for clamping the "convex" casting steel plate 2; a plurality of circular holes 31 are evenly distributed on the casting base 3; the number of circular holes 31 on the casting base 3 is the same as the number of telescopic members 51; the plurality of circular holes 31 on the casting base 3 are directly opposite to the positions of the plurality of telescopic members 51.
[0029] The "convex" shaped casting steel plate 2 includes several long steel plates; the cross-section of the long steel plate is half "convex" shaped; the number of the steel bars is the same as that of the long steel plates; the top 21 of the "convex" shaped casting steel plate is matched and snap-fitted with the nested fixing component 1; the bottom 22 of the "convex" shaped casting steel plate is matched and snap-fitted with the groove 32 of the casting base 3.
[0030] The pressure-bearing base 5 includes a pressure-bearing steel plate 52 , a plurality of telescopic members 51 placed on the pressure-bearing steel plate 52 , and a pressure-bearing pad 53 sleeved on the telescopic members 51 ; the telescopic members 51 are evenly distributed on the pressure-bearing steel plate 52 in a plumb state.
[0031] The pressure-bearing pad 53 includes a plurality of semi-annular steel pipes; the radius of the inner ring of the semi-annular steel pipe is equal to the radius of the cross section of the telescopic member 51 , and the semi-annular steel pipe is sleeved on the telescopic member 51 .
[0032] The telescopic member 51 is used to connect the casting base 3 with the pressure-bearing base 5 .
[0033] Specifically, in some embodiments of the present invention, the height of the telescopic member 51 is equal to the sum of the height of the pressure pad 53 and the height of the circular hole 31 on the casting base 3 .
[0034] Such arrangement ensures that when the pressure base 5 , the casting base 3 and the pressure pad 53 are connected via the telescopic member 51 , the telescopic member 51 has no exposed part, so that the casting base 3 is sufficiently flat.
[0035] Specifically, in some embodiments of the present invention, the diameter of the cross section of the telescopic member 51 is equal to the diameter of the circular hole 31 on the casting base 3 .
[0036] Such arrangement ensures that the telescopic member 51 fits perfectly with the circular hole 31 on the casting base 3 , thereby preventing the slurry from leaking through the circular hole 31 on the casting base 3 .
[0037] Specifically, in some embodiments of the present invention, the diameter of the cross section of the telescopic member 51 is less than or equal to 30 mm.
[0038] Such an arrangement ensures that the thermal conductivity sample 4 will not be too closely attached to the telescopic member 51 during demoulding, thereby reducing the probability of sample damage.
[0039] Specifically, in some embodiments of the present invention, the number of the telescopic members 51 is no less than four.
[0040] Such an arrangement ensures that the thermal conductivity sample 4 is subjected to surface force during demoulding, thereby avoiding damage to the thermal conductivity sample 4 during demoulding due to point force or line force.
[0041] The utility model provides a method for using the mold for non-destructively making a thermal conductivity sample, comprising the following steps:
[0042] S1. Snap the pressure pad 53 around the telescopic member 51 of the pressure base 5; then pass the telescopic member 51 through the circular hole 31 on the casting base 3 to connect the casting base 3 with the pressure base 5; then snap the bottom 22 of the "convex" casting steel plate into the groove 32 of the casting base 3; then snap the nested fixing member 1 into the top 21 of the "convex" casting steel plate; at this time, the casting base 3, the "convex" casting steel plate 2, and the telescopic member 51 on the pressure base 5 jointly form a cavity; wherein, the "convex" casting steel plate 2 is formed by snapping a plurality of long steel plates one by one into the groove 32 of the casting base 3; the cross sections of the plurality of long steel plates in the formed "convex" casting steel plate 2 are connected; the nested fixing member 1 is formed by snapping a plurality of steel bars one by one onto the top 21 of the formed "convex" casting steel plate;
[0043] S2, laying a layer of filter paper on the bottom of the cavity and brushing a layer of oil on it; then pouring the prepared slurry of the thermal conductivity coefficient sample into the cavity and leveling the surface of the slurry; after the slurry solidifies, disassembling the nested fixing component 1 and several long steel plates with semi-convex cross-sections in sequence;
[0044] S3. After step S2 is completed, the pressure pad 53 is removed; then the casting base 3 is gently pressed, and the telescopic member 51 on the pressure base 5 will slowly lift the solidified slurry upward, so that the solidified slurry can slowly separate from the casting base 3; the stress state of the thermal conductivity coefficient sample after demoulding is shown as follows Figure 3 As shown;
[0045] S4, after the solidified slurry is completely separated from the casting base 3, the solidified slurry is only in contact with the telescopic member 51 on the pressure-bearing base 5; then the solidified slurry on the telescopic member 51 is removed, and perfect demoulding is achieved.
[0046] With such a configuration, when the mold prepared by the utility model is used to cast and mold the slurry of the thermal conductivity sample, one side is free of constraints and is directly exposed to the air to form naturally without contacting the mold, thereby reducing the demolding workload; the other side is in contact with the casting base 3, and by removing the pressure pad 53 on the pressure base 5, the telescopic member 51 slowly lifts the solidified slurry upward, thereby slowly separating the solidified slurry from the casting base 3; finally, only the solidified slurry is in contact with the telescopic member 51 on the pressure base 5; such a small area of contact can be easily demolded. In the above manner, the demolding process of the thermal conductivity sample 4 is greatly facilitated, and the occurrence of incomplete demolding or sample breakage caused by large-area adhesion of the sample plate is avoided. This method has the advantages of simple process, convenient operation, stability and flexibility, and convenient demolding, which greatly improves the molding rate of the thermal conductivity sample 4.
[0047] The mold for non-destructively preparing thermal conductivity test specimens provided by the utility model is specifically described below in conjunction with the embodiments.
[0048] Example 1
[0049] like Figures 1-2 As shown, this embodiment provides a mold for non-destructively making thermal conductivity test specimens, including: a nested fixing component 1, a "convex" shaped casting steel plate 2 connected to the nested fixing component 1, a casting base 3 connected to the "convex" shaped casting steel plate 2, and a pressure-bearing base 5 connected to the casting base 3.
[0050] The nested fixing member 1 is composed of four steel bars (the cross section of the steel bar is a rectangle of 10 mm×10 mm).
[0051] The casting base 3 is made of a rectangular steel plate with a thickness of 20 mm. The casting base 3 is provided with a groove 32 (the cross-sectional size of the groove 32 is 10 mm×10 mm) for clamping the "convex" casting steel plate 2; five circular holes 31 with a hole diameter of 10 mm are evenly distributed on the casting base 3.
[0052] The "convex" casting steel plate 2 is composed of four long steel plates; the cross section of the long steel plate is half "convex" shaped; the top 21 of the "convex" casting steel plate is matched and snap-fitted with the nested fixing member 1; the bottom 22 of the "convex" casting steel plate is matched and snap-fitted with the groove 32 of the casting base 3. The protruding upper part of the long steel plate with a half "convex" cross section is 5 mm thick, and the lower part is 10 mm thick.
[0053] The pressure-bearing base 5 includes a pressure-bearing steel plate 52 with a thickness of 20 mm, five telescopic members 51 placed on the pressure-bearing steel plate 52 (the length of the telescopic members 51 is 70 mm, and the diameter of the cross-sectional circle is 10 mm), and a pressure pad 53 ring-circled on the telescopic members 51; the telescopic members 51 are evenly distributed on the pressure-bearing steel plate 52 in a plumb state; the positions of the five telescopic members 51 are opposite to the positions of the five circular holes 31 evenly distributed on the casting base 3.
[0054] The pressure pad 53 (height 50 mm) is a semi-annular steel pipe; the number of the semi-annular steel pipes is four; the radius of the inner ring of the semi-annular steel pipe (10 mm) is equal to the radius of the telescopic member 51; the four semi-annular steel pipes are respectively mounted on different telescopic members 51.
[0055] The telescopic member 51 is used to connect the casting base 3 with the pressure-bearing base 5 .
[0056] The height (70 mm) of the telescopic member 51 is equal to the sum of the height (50 mm) of the pressure pad 53 and the height (20 mm) of the circular hole 31 on the casting base 3 .
[0057] The diameter of the cross section of the telescopic member 51 is equal to the diameter of the circular hole 31 on the casting base 3 .
[0058] The dimensions of the steel plates of the casting base 3 and the pressure base 5 are the same, both of which are 400 mm×400 mm×20 mm.
[0059] The present embodiment provides a method for using the mold for non-destructively making a thermal conductivity sample, comprising the following steps:
[0060] S1. Snap the pressure pad 53 around the telescopic member 51 of the pressure base 5; then pass the telescopic member 51 through the circular hole 31 on the casting base 3 to connect the casting base 3 with the pressure base 5; then snap the bottom 22 of the "convex" casting steel plate into the groove 32 of the casting base 3; then snap the nested fixing member 1 into the top 21 of the "convex" casting steel plate; at this time, the casting base 3, the "convex" casting steel plate 2, and the telescopic member 51 on the pressure base 5 together form a cavity; wherein, the "convex" casting steel plate 2 is a hollow cavity. The plate 2 is formed by clamping a plurality of long steel plates one by one in the groove 32 of the casting base 3; the sections of the plurality of long steel plates in the formed "convex" casting steel plate 2 are connected; the nested fixing member 1 is formed by clamping a plurality of steel bars one by one on the top 21 of the formed "convex" casting steel plate; the formed "convex" casting steel plate 2 forms a rectangular cavity with a size of 300mm×300mm×40mm; the sections of the four long steel plates are connected; the nested fixing member 1 is formed to form a rectangular frame with a hollow interior (the inner diameter of the rectangular frame is 35mm×35mm);
[0061] S2, laying a layer of filter paper on the bottom of the cavity and brushing a layer of oil on it; then pouring the prepared slurry of the thermal conductivity coefficient sample into the cavity and leveling the surface of the slurry; after the slurry solidifies, disassembling the nested fixing component 1 and several long steel plates with semi-convex cross-sections in sequence;
[0062] S3. After step S2 is completed, the pressure pad 53 is removed; then the casting base 3 is gently pressed, and the telescopic member 51 on the pressure base 5 will slowly lift the solidified slurry upward, so that the solidified slurry can slowly separate from the casting base 3; the demoulding stress state of the thermal conductivity coefficient sample 4 is shown as follows Figure 3 As shown;
[0063] S4, after the solidified slurry is completely separated from the casting base 3, the solidified slurry is only in contact with the telescopic member 51 on the pressure-bearing base 5; then the solidified slurry on the telescopic member 51 is removed, and perfect demoulding is achieved.
[0064] In summary, the utility model provides a mold for non-destructively making thermal conductivity test specimens. The mold forms a cavity for pouring slurry by formulating a "convex" casting steel plate connected to a nested fixed component, a casting base connected to the "convex" casting steel plate, and a pressure-bearing base connected to the casting base; wherein a plurality of telescopic components and a pressure-bearing pad for connecting the casting base are arranged on the pressure-bearing steel plate of the pressure-bearing base; thus, after the pouring slurry is formed, the nested fixed components, a plurality of long steel plates with a semi-convex cross-section, and the pressure-bearing pad are sequentially disassembled; then the casting base is gently pressed, at which time the telescopic components on the pressure-bearing base will slowly lift the solidified slurry upward, so that the solidified slurry can slowly separate from the casting base; after the solidified slurry is completely separated from the casting base, the solidified slurry on the telescopic components is removed, and perfect demoulding can be achieved. In this way, one side is free of restraint and is directly exposed to the air to form naturally without contacting the mold, which reduces the demoulding workload; the other side is in contact with the casting base, and by removing the pressure pad on the pressure base, the telescopic member slowly lifts the solidified slurry upward, so that the solidified slurry slowly separates from the casting base; finally, only the solidified slurry is in contact with the telescopic member on the pressure base; such a small area of contact can be easily demoulded. This method has the advantages of simple process, convenient operation, stability and flexibility, and easy demoulding, which greatly improves the forming rate of making thermal conductivity test specimens.
[0065] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.
Claims
1. A mold for non-destructively making a thermal conductivity sample, characterized in that: include: A nested fixing member, a "convex" shaped casting steel plate connected to the nested fixing member, a casting base connected to the "convex" shaped casting steel plate, and a pressure-bearing base connected to the casting base.
2. The mold for non-destructively preparing thermal conductivity samples according to claim 1, characterized in that: The pressure-bearing base includes a pressure-bearing steel plate, a plurality of telescopic members placed on the pressure-bearing steel plate, and a pressure-bearing pad connected to the telescopic members; the telescopic members are evenly distributed on the pressure-bearing steel plate in a plumb state.
3. The mold for non-destructively preparing thermal conductivity samples according to claim 2, characterized in that: The nested fixing member includes a plurality of steel bars.
4. The mold for non-destructively preparing thermal conductivity samples according to claim 3, characterized in that: The "convex" shaped casting steel plate includes a plurality of long steel plates; the cross section of the long steel plate is semi-convex; the top of the "convex" shaped casting steel plate is connected to the nested fixing member; the bottom of the "convex" shaped casting steel plate is connected to the casting base.
5. The mold for non-destructively preparing thermal conductivity samples according to claim 4, characterized in that: The casting base is made of a steel plate, and is provided with a groove for clamping the "convex" casting steel plate; a plurality of circular holes are evenly distributed on the casting base; the number of circular holes on the casting base is the same as the number of telescopic members; the plurality of circular holes on the casting base are directly opposite to the positions of the plurality of telescopic members.
6. The mold for non-destructively preparing thermal conductivity test specimens according to claim 5, characterized in that: The pressure-bearing pad includes a plurality of semi-annular steel pipes; the radius of the inner ring of the semi-annular steel pipe is equal to the radius of the cross section of the telescopic member, and the semi-annular steel pipe is sleeved on the telescopic member.
7. The mold for non-destructively preparing thermal conductivity samples according to claim 6, characterized in that: The height of the telescopic member is equal to the sum of the height of the pressure pad and the height of the circular hole on the casting base.
8. The mold for non-destructively preparing thermal conductivity samples according to claim 7, characterized in that: The diameter of the cross section of the telescopic member is equal to the diameter of the circular hole on the casting base; the diameter of the cross section of the telescopic member is less than or equal to 30 mm; and the number of the telescopic members is not less than four.
9. The mold for non-destructively preparing thermal conductivity samples according to claim 8, characterized in that: The telescopic member is used to connect the casting base with the pressure-bearing base.