Paraffin sample preparation device and use method thereof

Abstract

The invention discloses a paraffin sample preparation device and a use method thereof.The device comprises a forming mold, a jacking structure and a stirring structure, the forming mold is provided with a plurality of sheet bodies, the multiple sheet bodies are spliced to define a forming cavity for forming paraffin, the length of the forming cavity is larger than that of paraffin to be formed, and the stirring structure is arranged on the forming mold; the forming mold is provided with a pouring opening communicated with the forming cavity, and the pouring opening is used for pouring paraffin liquid and supplementing the paraffin liquid subsequently; the jacking structure is connected with at least one sheet body of the forming mold, and the jacking structure is used for providing axial pressure in the axial direction of the forming cavity; the stirring structure is used for stirring the paraffin solution in the forming cavity through the pouring opening. According to the method, the device is used for preparing the paraffin, and the method and the device can solve the problem of random anisotropy performance of a prepared sample caused by uncontrollable cavity sinking in the paraffin preparation process, so that the paraffin forming effect is improved, and the required standard paraffin is prepared.

Description

Technical Field

[0001] This invention relates to the field of testing similar materials for soil and rock, specifically to a paraffin sample preparation apparatus and its usage method. Background Technology

[0002] Paraffin wax can serve as an excellent material for controlling temperature deformation, but its mechanical properties are unknown. Standard samples need to be prepared to test the mechanical properties of paraffin wax and provide a scientific basis for the formulation of similar materials. Paraffin wax is generally classified into soft wax, medium wax, and hard wax. However, during experimental preparation, soft wax, with its lower hardness, still deforms due to high room temperatures after molding, making it difficult to prepare. Medium wax has better hardness than soft wax and can maintain its shape after preparation, but its strength is poor. Hard wax has the best preparation effect among the three, is easy to mold, does not easily deform after preparation, and has a certain strength. However, when using traditional molds and processes, all three types of paraffin wax exhibit varying degrees of cavity depressions during the preparation process (see...). Figure 1 This, in turn, affects the quality of the sample. The process of indentation formation is as follows: When high-temperature molten paraffin is injected into the molding mold, the molten paraffin fills the entire molding cavity. The paraffin is at its highest temperature and its color is at its darkest (e.g., ...). Figure 1 (Figure 1) After standing for a period of time, once the paraffin liquid has partially solidified, due to the rapid cooling caused by contact with air at the top, the paraffin sample cannot form a complete shape and will show some depressions and shrinkage at the top (e.g., ...). Figure 1 Figure 2); Subsequently, as the settling time increased, the paraffin sidewalls also showed varying degrees of shrinkage (e.g., Figure 1 Figure 3), which results in pits on the top and sidewalls of the final formed paraffin wax (as shown in Figure 3). Figure 1 Figure 4).

[0003] Controllable shrinkage can simulate anisotropic characteristics or layered structures, while uncontrollable shrinkage directly affects the accuracy and effectiveness of the experiment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a paraffin sample preparation apparatus and method that can solve the problem of random anisotropy in sample preparation caused by uncontrollable cavity depressions during paraffin preparation, thereby improving the paraffin molding effect and preparing the required standard paraffin.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a paraffin sample preparation apparatus and its method of use: A paraffin sample preparation apparatus, comprising: The molding mold has multiple sheet bodies, which are assembled to form a molding cavity for molding paraffin wax. The length of the molding cavity is greater than the length of the paraffin wax to be molded. The molding mold has a pouring port that communicates with the molding cavity. The pouring port is used to pour liquid paraffin wax and subsequent replenishment of liquid paraffin wax. A pressing structure, connected to at least one sheet of the molding die, the pressing structure being used to provide axial pressure to the molding cavity; and A stirring structure is used to stir the paraffin solution in the molding cavity through the pouring port.

[0006] Furthermore, the molding die includes: The first mold body has a closed bottom and an open top. The first mold body includes multiple mold flaps, which are circumferentially spliced ​​together to form a barrel-shaped first mold body. The pouring port is located at the top of the first mold body. Connectors are used to circumferentially seal and fix multiple mold valves together; and The extension mold is an annular cylinder. The extension mold is detachably and coaxially inserted into the top of the first mold body, and the contact surface between the extension mold and the first mold body is sealed to form the molding cavity.

[0007] Furthermore, the connector is an annular collar, which is sleeved on the outside of the first mold body formed by splicing multiple mold flaps.

[0008] Furthermore, the molding die includes a second mold body, a first baffle plate, and a second baffle plate: the second mold body is a barrel-shaped body with both ends open, the pouring port is located on the side wall of the second mold body, the pouring port is covered with a removable first cap, the first baffle plate and the second baffle plate are detachably covered on both ends of the second mold body, forming a molding cavity for molding paraffin wax with the second mold body, and the top pressing structure is connected to the first baffle plate.

[0009] Furthermore, the side wall of the second mold body is provided with a vent hole communicating with its inner cavity, and a removable second cap is provided on the vent hole.

[0010] Furthermore, both the first cap and the second cap have air holes.

[0011] Furthermore, the top-pressing structure includes a fixing member and a push rod. The fixing member is fixed to the outside of the second mold body. The push rod is arranged along the axial direction of the second mold body and connected to the fixing member. The end of the push rod is connected to the first baffle plate and fixed to the fixing member, which can push the first baffle plate along the axial direction of the second mold body.

[0012] Furthermore, the side wall of the second mold body is provided with a slot communicating with the molding cavity, and the second baffle plate is inserted radially into the second mold body from the slot to seal the end of the second mold body.

[0013] Furthermore, it also includes an elastic extrusion plate, which is disposed inside the second mold body and placed on the inner surface of the second baffle plate.

[0014] A method of using the above-mentioned paraffin sample preparation apparatus includes: A molding die is provided, wherein the molding cavity of the molding die has multiple sheet assembly rings, the length of the molding cavity of the molding die exceeds the paraffin sample, and the molding die has a pouring port; Liquid paraffin wax is injected into the molding mold through the pouring port; Stir the injected liquid paraffin. When a cavity appears in the molding mold, add more liquid paraffin into the molding mold, and then perform post-cooling. After the paraffin has cooled and reached its set hardness, pressure is applied to compress and compact it. Trim off any portion of the formed paraffin wax that exceeds the designed length; Allow to stand and continue cooling. Once the design strength is reached, demold to complete the preparation of the standard specimen.

[0015] The beneficial effects of this invention are: The above-mentioned paraffin sample preparation apparatus and its usage method include a molding die, a top pressure structure, and a stirring structure.

[0016] During use, after the molding mold is assembled, high-temperature liquid paraffin is poured into the molding mold through the pouring port. After pouring, the liquid paraffin is stirred through the pouring port and cooled. During this process, liquid paraffin can be poured into the molding cavity as needed to keep the molding cavity full at all times.

[0017] Once the paraffin wax becomes difficult to stir, a top-pressure structure is used to pressurize and compact the liquid paraffin. Next, excess material is trimmed off. Finally, it is allowed to stand and continue cooling until it reaches the designed strength, at which point it is demolded, completing the paraffin wax preparation.

[0018] The paraffin sample preparation apparatus and method described herein have at least the following advantages: 1. Effectively overcomes uncontrollable shrinkage defects: By designing the length of the molding cavity to be greater than the length of the paraffin wax to be molded, and by replenishing the liquid paraffin wax in time through the pouring port during the cooling process, the cavity depression problem caused by paraffin wax shrinkage can be completely eliminated, avoiding random anisotropy in the sample preparation, thereby ensuring that the physical and mechanical properties of the paraffin wax sample are uniform, stable and controllable.

[0019] 2. Improve molding quality and precision: Stir the paraffin solution in a semi-solid state to promote uniform cooling and phase transformation, and reduce uneven internal shrinkage; then apply axial pressure through the top pressure structure to compress and compact the paraffin, making it dense and flat, achieving the design strength. Finally, after trimming, obtain a standard paraffin sample with accurate dimensions and a flat surface.

[0020] 3. Enhanced applicability and scalability: This device has a simple structure and is easy to operate. It is suitable for various types of paraffin wax, such as soft wax, medium wax, and hard wax, and can flexibly simulate rock and soil materials or composite materials of different strengths. In addition, by adding modifying materials to paraffin wax, the preparation range of similar materials can be further expanded to meet diverse experimental needs.

[0021] 4. Support for the preparation of anisotropic materials: Through the extrusion or stretching control of uniaxial or multiaxial molds, similar materials with layered structures or triaxial anisotropic characteristics can be prepared, providing a wider range of simulation capabilities for geotechnical engineering and materials testing.

[0022] 5. Improved experimental efficiency and repeatability: The entire preparation process is standardized and controllable, realizing the step-by-step extrusion and compaction of paraffin samples, which significantly improves the success rate and repeatability of sample preparation, providing a reliable guarantee for subsequent mechanical property testing. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 Schematic diagram of defect evolution in solidified paraffin samples Figure 2 This is a schematic diagram of a paraffin sample preparation apparatus provided in the first embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the extension mold in the paraffin sample preparation apparatus provided in the provided embodiment; Figure 4 for Figure 2 A schematic diagram of the connecting parts in the paraffin sample preparation apparatus provided in the embodiment; Figure 5 To adopt Figure 2 A schematic diagram of a paraffin sample prepared by the paraffin sample preparation apparatus provided in the embodiment; Figure 6 A schematic diagram of a paraffin sample preparation apparatus provided in the second embodiment of the present invention (a is a front view, b is a top view, and c is a left side view). Figure 7 To adopt Figure 6A schematic diagram of the paraffin sample preparation device during the casting of paraffin wax; Figure 8 To adopt Figure 6 A schematic diagram of the paraffin sample preparation device stirring the paraffin during the preparation process; Figure 9 To adopt Figure 6 A schematic diagram of the paraffin sample preparation device during extrusion and shaping. Figure 10 To adopt Figure 6 A schematic diagram of the paraffin sample preparation device during extrusion and demolding. Figure 11 This is a schematic diagram illustrating a method of using a paraffin sample preparation apparatus according to an embodiment of the present invention; Figure label: 1. Paraffin wax; 110. First mold body; 111. Mold flap; 120. Connector; 130. Extension mold; 140. Top pressure structure.

[0025] 210. Second mold body; 211. Pour port; 212. Vent hole; 220. First baffle plate; 230. Second baffle plate; 240. Top pressure structure; 241. Fixing component; 242. Push rod; 250. Mixing structure; 260. First cap; 270. Second cap; 280. Elastic extrusion plate. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] First implementation method: Please see Figure 2-5 Furthermore, this invention improves a paraffin wax sample preparation apparatus, which includes a molding die, a pressing structure, and a stirring structure. Specifically, the molding die has multiple sheets. The multiple sheets are assembled to form a molding cavity for molding paraffin wax 1, and the length of the molding cavity is greater than the length of the paraffin wax 1 to be molded. The molding die has a pouring port communicating with the molding cavity. The pouring port is used to pour liquid paraffin wax 1 and subsequent replenishment of liquid paraffin wax 1. The pressing structure 140 is connected to at least one sheet of the molding die, and the pressing structure is used to provide axial pressure to the molding cavity. The stirring structure is used to stir the paraffin wax 1 solution in the molding cavity through the pouring port 211.

[0028] In use, after the molding mold is assembled, high-temperature liquid paraffin 1 is poured into the molding mold through the pouring port 211. After pouring, the liquid paraffin 1 is stirred through the pouring port and cooled. During this process, liquid paraffin 1 can be poured into the molding cavity as needed to keep the molding cavity full.

[0029] Once the paraffin wax 1 becomes difficult to stir, the liquid paraffin wax 1 is pressurized and compacted using the top pressure structure 140. Next, excess portions of the molded paraffin wax 1 are trimmed off. Finally, it is allowed to stand and continue cooling. After reaching the designed strength, it is demolded, completing the preparation of paraffin wax 1.

[0030] It should be noted that since paraffin 1 is amorphous, ensuring its density during the phase transition process can guarantee that it remains isotropic and will not cause uncontrollable changes in the mechanical properties of the material due to agitation.

[0031] Using a paraffin wax sample preparation device, the problem of cavity depression in paraffin wax 1 is solved by making paraffin wax 1 with increased height. In the semi-solid state of paraffin wax 1, the liquid paraffin wax 1 is stirred and cooled evenly. When cavities appear, liquid paraffin wax 1 is added to improve the molding effect of paraffin wax 1. Paraffin wax 1 is compacted and flat by compression, so that paraffin wax 1 reaches the design strength. After removing the excess length of paraffin wax 1, the required standard paraffin wax 1 can be obtained.

[0032] Specifically, the molding die includes a first mold body 110, a connector 120, and an extension mold 130. The bottom of the first mold body 110 is closed and the top is open. The first mold body 110 includes multiple mold flaps 111, which are circumferentially spliced ​​to form a barrel-shaped first mold body 110. The pouring port 211 is located at the top of the first mold body 110.

[0033] In this embodiment, the connector 120 is preferably an annular collar, which is sleeved on the outside of the first mold body 110 formed by splicing multiple mold flaps 111.

[0034] In other embodiments, the connector 120 can take other forms, such as providing connecting ear plates on the mold valve 111, with adjacent mold valves 111 connected by bolts, or multiple mold valves 111 can be connected sequentially. Furthermore, adjacent mold valves 111 can also be connected by snap-fit. That is, any method that can seal and connect multiple mold valves 111 is acceptable.

[0035] During the solidification process of paraffin wax 1, the central part of its surface gradually sinks, forming a large pit. Even with sealed cooling, random internal cracks and cavities will form, which is detrimental to the fabrication of test models with controllable physical and mechanical properties. To address the collapse caused by the sinking of the top and sides of paraffin wax 1 during solidification, this embodiment utilizes the stable properties and isotropic characteristics of the non-crystalline material paraffin wax 1. The molding die in this embodiment includes an extension die. Specifically, the extension die 130 is an annular cylinder, which is detachably and coaxially inserted into the top of the first mold body 110. The contact surface between the extension die 130 and the first mold body 110 is sealed to form the molding cavity.

[0036] It should be noted that in this embodiment, the top-pressing structure can be a compaction hammer commonly used in the prior art. The compaction hammer is connected to multiple mold flaps 111 simultaneously. The driving source of the compaction hammer can be manual or other mechanical lifting mechanisms; that is, any mechanism that can compact and flatten the paraffin 1 inside the first mold body 110 is acceptable. In addition, the shape of the top-pressing structure 140 should be adapted to the inner cavity shape of the molding mold as much as possible. The stirring structure 250 can be tweezers or stirring rods commonly used in the prior art.

[0037] In addition, the height of the extension mold 130 can be selected as one-quarter the height of the forming mold.

[0038] The specific operating steps of the above-mentioned paraffin sample preparation apparatus are as follows: 1. Sequentially assemble multiple mold flaps 111 into a barrel shape and secure them by using a ring-shaped clamp.

[0039] 2. Install the extension mold 130 at the top of the first mold body 110. The extension mold 130 can prevent insufficient paraffin wax 1 due to solidification shrinkage.

[0040] 3. After filling the mold with liquid paraffin 1, add more liquid paraffin 1 in time when a cavity appears in the molding mold, and stir the liquid paraffin 1 continuously at low speed with a stirrer to make it cool down evenly and shrink and change phase evenly. 4. After the paraffin wax 1 is difficult to stir, remove the stirrer and use the top pressure structure 140 (compacting hammer) to tamp it flat and remove the cavities caused by shrinkage.

[0041] 5. Remove the extension mold 130 and the annular collar in sequence, exposing the top of the paraffin wax 1. Then trim off the excess paraffin wax 1 with a blade. 6. Wait for the paraffin wax 1 to cool down and reach the designed strength, then separate the mold flaps 111 to demold, thus completing the preparation of the standard sample.

[0042] The paraffin wax sample preparation device is simple in structure and easy to operate. By making a height-enhancing sample, the problem of cavity depression in paraffin wax 1 is solved. In the semi-solid state of paraffin wax 1, the liquid paraffin wax 1 is stirred and cooled evenly. When cavities appear, liquid paraffin wax 1 is added to improve the molding effect of paraffin wax 1. By compressing paraffin wax 1 to make it dense and flat, paraffin wax 1 can reach the design strength. After removing the excess length of paraffin wax 1, the required standard paraffin wax 1 can be obtained.

[0043] It should be noted that, in specific implementation, the first mold body 110 is preferably transparent, and scale values ​​are set on the outer wall of the first mold body 110 along its axial direction to facilitate control of the length of the paraffin wax 1.

[0044] Second implementation method: Please see Figure 6 Furthermore, the present invention also provides another paraffin sample preparation apparatus, the specific structure of which is as follows: This paraffin wax sample preparation apparatus includes a second mold body 210, a first baffle plate 220, and a second baffle plate 230. The second mold body 210 is a barrel-shaped body with both ends open. A pouring port 211 is located on the side wall of the second mold body 210, and a removable first cap 260 is provided on the pouring port 211. A stirring structure 250 can extend into the pouring port 211 to stir the paraffin wax 1 in the molding tank. The first baffle plate 220 and the second baffle plate 230 are detachably covered at both ends of the second mold body 210, forming a molding cavity for molding the paraffin wax 1. A top pressure structure 140 is connected to the first baffle plate 220.

[0045] In a preferred embodiment, the top of the second mold body 210 is also provided with a vent 212 communicating with its inner cavity. A removable second cap 270 is provided on the vent 212. When paraffin wax 1 is added into the molding groove through the pouring port 211, the air inside the molding cavity can be discharged through the vent 212 to prevent the air pressure inside the molding cavity from becoming too high.

[0046] In a more preferred embodiment, both the first cap 260 and the second cap 270 are provided with vent holes. These vent holes serve to seal the opening while simultaneously allowing air to escape.

[0047] In this embodiment, the top-pressing structure 140 includes a fixing member 241 and a push rod 242. The fixing member 241 is fixed to the outside of the second mold body 210. The push rod 242 is arranged along the axial direction of the second mold body 210 and is connected to the fixing member 241. The end of the push rod 242 is connected to a first baffle plate 220 and fixed to the fixing member 241, which can push the first baffle plate 220 along the axial direction of the second mold body 210.

[0048] When it is necessary to squeeze and eject the paraffin 1 in the molding cavity, the first baffle plate 220 can be driven to move towards the second baffle plate 230 by the push rod 242, so that the paraffin 1 can be compressed. When the second baffle plate 230 is in the disassembled state, the paraffin 1 prototype can be ejected from the molding groove.

[0049] Specifically, push rod 242 is a screw. Fixing member 241 is a fixing plate. Push rod 242 is threadedly connected to fixing plate and rotatably connected to first stop plate 220.

[0050] In practice, simply rotating the push rod 242 will drive the first baffle plate 220 to move.

[0051] To facilitate the installation and removal of the second baffle plate 230, in a specific implementation, a slot communicating with the forming groove can be provided on the top of the second mold body 210. The second baffle plate 230 is inserted downwards into the forming groove through the slot to seal the end of the forming groove. In use, the second baffle plate 230 can be inserted or removed through the slot.

[0052] Similarly, it should be noted that in specific implementation, the second mold body 210 is preferably transparent, and scale values ​​are set on the outer wall of the second mold body 210 along its axial direction to facilitate control of the length of the paraffin wax 1.

[0053] Furthermore, as a more preferred embodiment, the device also includes an elastic extrusion plate 280, which is disposed within the second mold body 210 and rests on the inner surface of the second baffle plate 230. In specific implementations, the elastic extrusion plate 280 can be made of high-density sponge commonly used in the prior art. During the preparation of paraffin wax 1, the high-density sponge undergoes compression deformation and corresponding elastic resistance, analogous to a spring. The elastic extrusion plate 280 and the first baffle plate 220 form a bidirectional extrusion on the paraffin wax 1, further compressing and eliminating depression shrinkage, thereby further improving the molding effect of paraffin wax 1.

[0054] The specific usage of the above-mentioned paraffin sample preparation device is as follows: 1. Casting paraffin wax 1 (see Figure 7 ) First, set up the paraffin sample preparation device and place it flat. Then, open the pouring port 211 and inject high-temperature paraffin liquid into the molding cavity. 2. Stir the paraffin wax 1 (see Figure 8 ) Insert the thermometer into the vent 212 and insert the stirring rod into the pouring port 211. Stir the liquid paraffin 1 with the stirring rod. Stirring can make the liquid paraffin 1 cool down evenly and avoid the formation of cavity depressions.

[0055] 3. Extrusion molding (see...) Figure 9 ) When the thermometer shows that the temperature drops to 30~40℃, the paraffin wax 1 is in a semi-solid liquid state and is compressible. Remove the thermometer and stirring rod, and seal the injection hole of paraffin wax 1 with the first cap 260 and the second cap 270. Rotate the push rod 242 to drive the first baffle plate 220 to compress and shape the paraffin wax 1. Gas can be discharged from the air hole to avoid the pressure inside the mold from increasing due to the closed compression.

[0056] 4. Fine-tuning (see...) Figure 10 ) After the paraffin wax 1 has completely cooled and solidified and has achieved a certain strength, slide the second baffle plate 230 upwards. Refer to the external scale value of the second mold body 210, then measure the length of the excess paraffin wax 1. Then rotate the push rod 242 one revolution and use the experimental tool to trim off the excess paraffin wax 1 that has been ejected. Then, use the same method to perform fine trimming one revolution at a time.

[0057] 5. Extrusion demolding (see...) Figure 10 ) Continue rotating push rod 242 to completely push out the prepared paraffin wax 1, forming standard paraffin wax 1.

[0058] Using the above two devices to prepare paraffin wax 1 sample can solve the problem of cavity depression in paraffin wax 1. By compressing paraffin wax 1 to make it dense and flat, paraffin wax 1 can reach the designed strength. After removing the excess length of paraffin wax 1, the required standard paraffin wax 1 can be obtained.

[0059] Please see Figure 10 This invention provides a method for preparing paraffin 1, comprising: S. A molding mold is provided, the molding cavity of the molding mold has multiple sheet assembly rings, the length of the molding cavity of the molding mold exceeds the length of the paraffin wax 1, and the molding mold has a pouring port 211.

[0060] S. Liquid paraffin 1 is injected into the molding mold through the pouring port 211.

[0061] S. Stir the injected liquid paraffin 1. When a cavity appears in the molding mold, add more liquid paraffin 1 into the molding mold, and then perform post-cooling.

[0062] S140. When the paraffin 1 has cooled and reached the set hardness, apply pressure to compress and compact it.

[0063] Specifically, the hardness can be set to the hardness of paraffin 1 when it is hard to stir.

[0064] S150. Trim off any portion of the formed paraffin wax 1 that exceeds the designed length.

[0065] S160, let stand and continue to cool, and demold after reaching the design strength to complete the preparation of standard specimens.

[0066] This method is used to prepare paraffin wax sample 1. By making a height-enhancing sample, the problem of cavity depression in paraffin wax 1 is solved. In the semi-solid state of paraffin wax 1, the liquid paraffin wax 1 is stirred and cooled evenly. When cavities appear, liquid paraffin wax 1 can be added step by step to improve the molding effect of paraffin wax 1. By compressing paraffin wax 1 to make it dense and flat, paraffin wax 1 can reach the design strength. After removing the excess length of paraffin wax 1, the required standard paraffin wax 1 can be obtained.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A paraffin sample preparation device, characterized by, The application relates to a wax forming mold, which comprises a plurality of pieces, the plurality of pieces are assembled to form a wax forming cavity, the length of the wax forming cavity is greater than the length of a wax sample to be formed, the wax forming mold is provided with a pouring opening which is used for pouring liquid wax and subsequently supplementing liquid wax, a top pressing structure which is connected with at least one piece of the wax forming mold and is used for providing axial pressure to the wax forming cavity, and a stirring structure which is used for stirring the liquid wax in the wax forming cavity through the pouring opening. The wax forming mold comprises a first mold body, a connecting piece and an extension mold. The bottom of the first mold body is closed, the top of the first mold body is open, the first mold body comprises a plurality of mold valves which are circumferentially assembled into the barrel-shaped first mold body, the pouring opening is located at the top of the first mold body, the connecting piece is used for circumferentially sealingly assembling and fixing the plurality of mold valves together, and the extension mold is annular and cylindrical, the extension mold is coaxially and detachably arranged at the top of the first mold body, and the extension mold is sealingly connected with the contact surface of the first mold body to form the wax forming cavity. The connecting piece is an annular sleeve which is arranged outside the first mold body assembled by the plurality of mold valves. The wax forming mold comprises a second mold body, a first blocking plate and a second blocking plate.

2. The paraffin sample preparation device of claim 1, wherein, The second mold body is a barrel-shaped body with both ends being open, the pouring opening is located on the side wall of the second mold body, a first cap is arranged on the pouring opening and can be removed, the first blocking plate and the second blocking plate are respectively detachably arranged at both ends of the second mold body and surround the wax forming cavity together with the second mold body, and the top pressing structure is connected with the first blocking plate. The side wall of the second mold body is provided with a ventilation hole which is communicated with the inner cavity of the second mold body, and a second cap is arranged on the ventilation hole and can be removed. Air holes are arranged on the first cap and the second cap. The top pressing structure comprises a fixing piece and a push rod, the fixing piece is fixed on the outside of the second mold body, the push rod is arranged along the axial direction of the second mold body and is connected with the fixing piece, the end of the push rod is connected with the first blocking plate and is fixed with the fixing piece, and the first blocking plate can be pushed along the axial direction of the second mold body.

3. The paraffin sample preparation device of claim 2, wherein, The side wall of the second mold body is provided with a slot which is communicated with the wax forming cavity, and the second blocking plate is radially inserted into the second mold body from the slot to block the end of the second mold body.

4. The paraffin sample preparation device of claim 1, wherein, An elastic extrusion plate is arranged in the second mold body and is arranged on the inner surface of the second blocking plate.

5. The paraffin sample preparation device of claim 4, wherein, The application further relates to a wax forming method, which comprises the following steps: providing a wax forming mold, the wax forming cavity of the wax forming mold is assembled by a plurality of pieces, the length of the wax forming cavity of the wax forming mold is greater than the length of a wax sample, the wax forming mold is provided with a pouring opening, pouring liquid wax into the wax forming mold through the pouring opening, stirring the poured liquid wax, supplementing liquid wax into the wax forming mold when a cavity appears in the wax forming mold, and then performing post-cooling.

6. The paraffin sample preparation apparatus of claim 5, wherein, ​ 7. The paraffin sample preparation device of claim 5, wherein, ​ 8. The paraffin sample preparation device of claim 4, wherein, ​ 9. The paraffin sample preparation device of claim 7, wherein, ​ 10. A method of using the device for preparing a sample of paraffin wax according to any one of claims 1 to 9, characterized in that, ​ ​ ​ ​ When the paraffin wax is cooled to the set hardness, it is compressed by pressing to compact it; The excess part of the paraffin wax beyond the designed length is trimmed off; After standing and continuing to cool, the standard sample preparation is completed after the designed strength is reached and the sample is demolded.

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