Marshall test piece mold capable of being rapidly demolded

Abstract

The utility model discloses a Marshall test piece mould capable of demoulding quickly, the Marshall test piece mould comprises a first cylinder body and a second cylinder body which are matched left and right, and the first cylinder body and the second cylinder body respectively comprise an inner cylinder body and an outer cylinder body; hinge structures are respectively arranged on the outer walls of the first cylinder and the second cylinder and cling to the first contact edges; the lock catch structure comprises a lock cylinder structure and a plunger latch structure; the lock cylinder structure and the plunger latch structure are connected with the outer cylinder body through the lock seat; after the Marshall test piece is compacted and formed, the barrel can be separated only by shifting the connecting rod on the lock catch structure, meanwhile, the anti-sticking coating is arranged in the barrel, rapid demolding of the Marshall test piece can be achieved, a demolding machine is avoided, the phenomenon that the test piece is damaged and deformed in the demolding process of the demolding machine can be avoided, and the precision of a test result is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mold manufacturing, in particular to a Marshall test piece mold with rapid demoulding. Background Art

[0002] The Marshall test is a standard test method widely used in highway engineering, civil engineering and other fields. It is mainly used to evaluate the performance of asphalt mixtures. The Marshall mold is a tool specifically used for the Marshall test. The main purpose of the Marshall mold is to make asphalt mixture specimens of standardized size and shape for subsequent physical and mechanical property testing. With the continuous deepening of research on asphalt mixtures, various new asphalt mixtures have emerged in an endless stream. The Marshall test is a crucial link in the research and development and verification of the road performance of these new materials. Testing and verification of the performance of these new materials often requires a large number of repeated tests. At present, demolding machines are often used to demold the manufactured Marshall specimens. The demolding workload is large, and the surface of the specimen may be damaged due to uneven pressure during the demolding process, affecting the test results. Summary of the invention

[0003] The purpose of the embodiment of the utility model is to provide a Marshall specimen mold with rapid demoulding, so as to realize rapid and lossless demoulding of the Marshall specimen.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is a quick demoulding Marshall specimen mold, comprising a first cylinder and a second cylinder matched on the left and right, wherein the first cylinder and the second cylinder both comprise an inner cylinder and an outer cylinder;

[0005] Hinge structures are respectively arranged on the outer walls of the first cylinder and the second cylinder, close to the first contact edge;

[0006] The hinge structure includes a hinge sleeve and a hinge pin, and the hinge sleeves of the first cylinder and the second cylinder are sequentially inlaid from top to bottom; a pin hole is opened on the hinge sleeve, and the hinge pin passes through the pin hole to complete the hinge connection between the first cylinder and the second cylinder;

[0007] Locking structures are respectively arranged on the outer walls of the first cylinder and the second cylinder, close to the second contact edge.

[0008] Furthermore, an anti-stick coating is provided on the inner wall of the inner cylinder.

[0009] Furthermore, the lock buckle structure includes a lock core structure and a lock latch structure; the lock core structure and the lock latch structure are connected to the outer cylinder through a lock seat;

[0010] The latch structure is a hollow truncated cone structure, the larger bottom surface is a closed structure, and the smaller bottom surface is an opening; the latch structure also includes a latch body fixed at the center of the larger bottom surface;

[0011] The lock core structure includes a lock core shell, the lock core shell is a hollow truncated cone structure, the lock core structure also includes a lock core cylinder and a bottom plate, the bottom plate is the larger bottom surface of the lock core cylinder;

[0012] A rectangular cylinder opening is arranged at the top of the lock cylinder, and a long strip-shaped limiting hole is arranged near the bottom plate;

[0013] The lock core structure also includes a limit tray, which is a disc structure with a raised limit connecting rod arranged on the circumference and arranged inside the lock core cylinder parallel to the bottom plate. The disc part of the limit tray is smaller than the bottom plate and larger than the top opening of the lock core cylinder. The limit connecting rod of the limit tray extends out of the limit hole to achieve the limitation and movement of the limit tray. A circular latch hole is arranged at the center of the limit tray; a spring is arranged between the limit tray and the bottom plate; and three steel balls are arranged between the limit tray and the top opening of the lock core cylinder.

[0014] Furthermore, the latch body is a columnar structure, in which a self-locking section is formed near the latch head, the diameter of the self-locking section is smaller than the latch head, the latch head and the self-locking section extend outward from the latch structure, the total length of the latch head and the self-locking section is smaller than the length of the lock core structure, and the length of the self-locking section is greater than the radius of the steel ball.

[0015] Furthermore, the three steel balls are of the same size, the maximum distance from the center point to the surface of the steel balls when the three steel balls are in close contact is greater than the radius of the smaller bottom opening of the lock cylinder and smaller than the radius of the bottom plate, and the minimum distance from the center point to the surface of the steel balls when the three steel balls are in close contact is less than the radius of the bolt head.

[0016] Furthermore, the bolt hole diameter is larger than the bolt head diameter.

[0017] Furthermore, the opening of the cylinder is smaller than the diameter of the steel ball.

[0018] Furthermore, the Marshall specimen mold includes two or more locking mechanisms.

[0019] The beneficial effects of the utility model are as follows: after the Marshall specimen of the utility model is compacted and formed, the cylinder can be separated by simply turning the connecting rod on the locking structure. At the same time, an anti-stick coating is provided inside, which can realize rapid demoulding of the Marshall specimen and avoid the use of a demoulding machine. The phenomenon that the specimen is damaged and deformed during the demoulding process using a demoulding machine can be avoided, thereby improving the accuracy of the test results.

[0020] At the same time, compared with other detachable Marshall test piece molds, the utility model has the advantages of simple operation and short time consumption. No parts need to be disassembled when demoulding, which avoids the loss of test piece parts due to poor storage or other reasons, making the test difficult to conduct. In addition, the lock body and lock core structure of the utility model are processed separately. When one part is damaged, the individual parts can be quickly replaced without replacing the entire part, which reduces the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 Schematic diagram of the Marshall specimen mold cylinder according to the present embodiment.

[0023] Figure 2 Schematic diagram of the lock structure of this embodiment.

[0024] Figure 3 2 is a cross-sectional view of the latch body structure according to the present embodiment.

[0025] Among them, 1. the first cylinder; 2. the second cylinder; 3. the inner cylinder; 4. the outer cylinder; 5. the hinge sleeve; 6. the pin hole; 7. the lock seat; 8. the lock core shell; 9. the latch structure; 10. the limiting hole; 11. the latch body; 12. the hinge pin; 13. the lock core structure; 14. the lock core cylinder; 15. the cylinder opening; 16. the steel ball; 17. the limiting tray; 18. the bottom plate; 19. the spring; 20. the latch hole; 21. the latch head; 22. the self-locking section. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] This embodiment provides a Marshall specimen mold with rapid demoulding, which is used to mold the Marshall specimen. The device can realize rapid demoulding of the Marshall specimen without complicated demoulding process, and avoid product defects caused by uneven force during traditional demoulding of the specimen. The specific structure is as follows:

[0028] like Figure 1, a quick demoulding Marshall specimen mold, comprising a first cylinder 1 and a second cylinder 2; the first cylinder 1 and the second cylinder 2 both comprise an inner cylinder 3 and an outer cylinder 4; the inner wall of the inner cylinder 3 is provided with an anti-stick coating, both ends of the inner cylinder 3 are higher than the outer cylinder 4, which is convenient for connection with other molds, and the inner cylinder 3 and the outer cylinder 4 are integrally cast; the first cylinder 1 and the second cylinder 2 are connected by hinges and locking mechanisms respectively arranged on both sides of the outer cylinder 4; the hinge is arranged on the outer surface of the outer cylinder 4 of the first cylinder 1 and the second cylinder 2, close to the first contact edge, and comprises a hinge sleeve 5 and a hinge pin 12; the hinge sleeves 5 on the first cylinder 1 and the second cylinder 2 are inlaid in sequence from top to bottom, and the pin hole 6 on the hinge sleeve 5; when the cylinders are spliced, the hinge pin 12 passes through the pin hole 6 on the first cylinder 1 and the second cylinder 2 to realize the connection between the first cylinder 1 and the second cylinder 2, and limits the rotation opening and closing of the first cylinder 1 and the second cylinder 2 in the horizontal direction.

[0029] The outer surfaces of the outer cylinders 4 of the first cylinder 1 and the second cylinder 2 are closely attached to the second contact edge to form a locking mechanism, which includes a lock core structure 13 and a latch structure 9; the lock core structure 13 and the latch structure 9 are connected to the outer cylinder 4 through a lock seat 7. In some specific embodiments, the latch structure 9 is a hollow truncated cone structure, the larger bottom surface is a closed structure, the smaller bottom surface is an opening, a latch body 11 is fixed at the center of the larger bottom surface, and extends toward the smaller bottom surface and extends out of the latch structure 9. In this embodiment, two groups of locking mechanisms are provided from top to bottom, and in other possible embodiments, the number of locking mechanisms can be set to more than two groups as required.

[0030] like Figure 2 In some specific embodiments, the lock core structure 13 includes a lock core housing 8, which is a hollow truncated cone structure, including a lock core cylinder 14 and a bottom plate 18; a rectangular cylinder opening 15 is arranged on the top of the lock core cylinder 14, and a long strip-shaped limiting hole 10 is arranged on the lock core cylinder 14 near the bottom plate 18; the lock core structure 13 also includes a limiting tray 17, which is a disc structure, and a raised limiting connecting rod is arranged on the circumference, which is arranged inside the lock core housing 8 parallel to the bottom plate 18, and the disc part of the limiting tray 17 is smaller than the bottom plate 18 and larger than the top of the lock core cylinder 14. The limit tray 17 has an opening at the bottom, and the limit connecting rod of the limit tray 17 extends out of the limit hole 10 to limit and move the limit tray 17. A circular latch hole 20 is provided at the center of the limit tray 17; a spring 19 is provided between the limit tray 17 and the bottom plate 18; three equal-sized steel balls 16 are provided between the limit tray 17 and the top opening of the lock cylinder 14, and the maximum distance from the center point of the three steel balls 16 to the surface of the steel ball 16 when the three steel balls 16 are tightly attached is greater than the radius of the smaller bottom opening of the lock cylinder and is less than the radius of the bottom plate 18, and the minimum distance from the center point of the three steel balls 16 to the surface of the steel ball when the three steel balls 16 are attached is less than the radius of the latch head 21.

[0031] In some specific implementations, the width of the cylinder opening 15 is smaller than the diameter of the steel ball 16 .

[0032] like Figure 3 The latch is a columnar structure, wherein the portion close to the latch head 21 is a self-locking section 22, and the diameter of the self-locking section 22 is smaller than the latch head 21. When the first cylinder and the second cylinder are connected, the latch head 21 and the self-locking section 22 partially extend out of the latch structure 9 and are inserted into the latch hole 20 on the limiting tray 17, and the other end of the latch is connected to the larger bottom surface of the latch structure 9.

[0033] The specific process of the Marshall specimen mold described in this embodiment is as follows: the first cylinder 1 and the second cylinder 2 are spliced ​​facing each other, the hinge pin 12 is inserted into the hinge sleeve 5 of the first cylinder 1 and the second cylinder 2, and the latch head 21 of the latch body 11 is inserted into the lock core structure 13. At this time, the steel ball 16 in the lock core structure 13 pushes the limiting tray 17 to move backward to compress the spring 19. As the latch head 21 continues to penetrate, the steel ball 16 moves relative to the latch body 11 to the vicinity of the self-locking section 22. Since the radius of the self-locking section 22 is smaller than the latch head 21, the spring 19 pushes the limiting tray 17 forward to push the steel ball 16 to move toward the self-locking section 22 and get stuck in the self-locking section 22. At this time, the steel ball 16 is limited by the self-locking section 22 to complete locking, and the mold is assembled at this time. When the Marshall specimen needs to be removed, it is only necessary to push the limiting connecting rod of the limiting tray 17 extending out of the limiting hole 10 toward the bottom plate 18 to move the steel ball 16 out of the self-locking section 22 so that the position of the steel ball 16 is no longer restricted. Continue to apply force to move the steel ball 16 from the self-locking section 22 to the latch head 21. At this time, the mold can be opened to complete the demolding of the specimen.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A quick demoulding Marshall specimen mold, comprising a first cylinder (1) and a second cylinder (2) that fit together on the left and right, characterized in that: The first cylinder (1) and the second cylinder (2) both comprise an inner cylinder (3) and an outer cylinder (4); Hinge structures are respectively arranged on the outer walls of the first cylinder (1) and the second cylinder (2) close to the first contact edge; The hinge structure comprises a hinge sleeve (5) and a hinge pin (12), wherein the hinge sleeves (5) of the first cylinder (1) and the second cylinder (2) are sequentially inlaid from top to bottom; a pin hole (6) is formed on the hinge sleeve (5), and the hinge pin (12) passes through the pin hole (6) to complete the hinge connection between the first cylinder (1) and the second cylinder (2); Locking structures are respectively arranged on the outer walls of the first cylinder (1) and the second cylinder (2) in close contact with the second contact edge.

2. A quick demoulding Marshall specimen mold according to claim 1, characterized in that: The inner wall of the inner cylinder (3) is provided with an anti-stick coating.

3. A quick demoulding Marshall specimen mold according to claim 1, characterized in that: The lock catch structure comprises a lock core structure (13) and a lock latch structure (9); the lock core structure (13) and the lock latch structure (9) are connected to the outer cylinder (4) via a lock seat (7); The latch structure (9) is a hollow truncated cone structure, the larger bottom surface is a closed structure, and the smaller bottom surface is an opening; the latch structure (9) further comprises a latch body (11) fixed at the center of the larger bottom surface; The lock core structure (13) comprises a lock core housing (8), the lock core housing (8) being a hollow truncated cone structure, and the lock core structure (13) further comprises a lock core cylinder (14) and a bottom plate (18), the bottom plate (18) being the larger bottom surface of the lock core cylinder (14); A rectangular cylinder opening (15) is provided at the top of the lock cylinder (14), and a long strip-shaped limiting hole (10) is provided near the bottom plate (18); The lock core structure (13) further comprises a limit tray (17), the limit tray (17) being a disc structure, a limit rod protruding on the circumference thereof, and being arranged inside the lock core cylinder (14) parallel to the bottom plate (18); the disc portion of the limit tray (17) being smaller than the bottom plate (18) and larger than the top opening of the lock core cylinder (14); the limit rod of the limit tray (17) extending out of the limit hole (10) to limit and move the limit tray (17); a circular latch hole (20) being arranged at the center of the limit tray (17); a spring (19) being arranged between the limit tray (17) and the bottom plate (18); and three steel balls (16) being arranged between the limit tray (17) and the top opening of the lock core cylinder (14).

4. A quick demoulding Marshall specimen mold according to claim 3, characterized in that: The latch body (11) is a columnar structure, wherein the portion close to the latch head (21) is a self-locking section (22), the diameter of the self-locking section (22) is smaller than the latch head (21), the latch head (21) and the self-locking section (22) extend outward from the latch structure (9), the total length of the latch head (21) and the self-locking section (22) is smaller than the length of the lock core structure (13), and the length of the self-locking section (22) is greater than the radius of the steel ball (16).

5. A quick demoulding Marshall specimen mold according to claim 3, characterized in that: The three steel balls (16) are of the same size; the maximum distance from the center point of the three steel balls (16) to the surface of the steel balls (16) when they are in close contact is greater than the radius of the smaller bottom opening of the lock cylinder (14) and smaller than the radius of the bottom plate (18); and the minimum distance from the center point of the three steel balls (16) to the surface of the steel balls (16) when they are in close contact is smaller than the radius of the bolt head (21).

6. A quick demoulding Marshall specimen mold according to any one of claims 3 and 4, characterized in that: The diameter of the bolt hole (20) is greater than the diameter of the bolt head (21).

7. A quick demoulding Marshall specimen mold according to any one of claims 3 and 5, characterized in that: The cylinder opening (15) is smaller than the diameter of the steel ball (16).

8. A quick demoulding Marshall specimen mold according to any one of claims 1 and 3, characterized in that: The Marshall specimen mold includes two or more locking mechanisms.

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