Asphalt mixture plate-shaped test piece forming mold
By designing a notch on the bottom of the mold and a columnar structure for the demolding pressure plate, the problem of difficult demolding during the molding of asphalt mixture slab specimens was solved, achieving an easy and efficient demolding process and improving test efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-03-03
AI Technical Summary
The existing asphalt mixture slab specimens are difficult to demold, time-consuming and labor-intensive, and require high-quality testing equipment.
Design a mold structure including a mold, a pull-out pad, and a demolding pressure plate. The bottom surface of the mold has a through notch, and the demolding pressure plate has a column. The specimen can be easily demolded by pulling out the pad and pressing the column of the demolding pressure plate.
It effectively saves the physical strength and time of the test personnel, improves the test efficiency, and avoids the time-consuming and laborious operation of disassembling bolts.
Smart Images
Figure CN223966337U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of indoor molding technology for road materials, specifically relating to a molding die for asphalt mixture slab specimens. Background Technology
[0002] Asphalt mixture slab specimens are an important type of specimen in indoor asphalt mixture testing. Many indoor asphalt mixture tests require slab specimens, such as uniaxial compression tests (cylinder method) and bending tests, which require core sampling from slab specimens. Fatigue tests require cutting slab specimens into prismatic shapes, while rutting tests require whole slab specimens. The "Specifications for Testing Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011) describes the preparation of asphalt mixture specimens (taking the wheel rolling method as an example). A steel mold with internal dimensions of 300mm (length) × 300mm (width) × 50-100mm (thickness) is used for filling the specimen, which is then repeatedly rolled on a wheel rolling mill. Demolding the specimen after molding is difficult; all bolts on the steel mold must be removed, and the mold must be disassembled into individual steel plates before the molded specimen can be removed. However, due to the heavy weight of the steel mold, the bolts are not easy to remove and take a long time to disassemble, making it time-consuming and laborious to demold the specimen. This places higher demands on the testing equipment. Utility Model Content
[0003] This invention aims to solve the problem of difficult demolding when molding asphalt mixture slab specimens.
[0004] This utility model provides the following technical solution: a molding die for asphalt mixture slab specimens, including a die, a pull-out pad, and a demolding pressure plate; the die has a mold cavity with an open top, and a through notch is opened on the bottom surface of the mold cavity; a column adapted to the notch on the bottom surface of the mold cavity is erected on the demolding pressure plate; an insertion port is opened on the side of the mold cavity; the pull-out pad can be inserted into the mold cavity through the insertion port; the pull-out pad serves as the bottom of the mold cavity that can be pulled out.
[0005] Furthermore, the mold includes four upright plates and a base plate. The four upright plates surround the base plate on all four sides, forming a mold cavity in the middle. The bottom edges of two opposing upright plates leave gaps with the base plate as insertion slots, while the bottom edges of the other two opposing upright plates are connected to the base plate. The base plate has notches.
[0006] Furthermore, lifting handles are installed on the outer surfaces of the two uprights that connect to the base plate.
[0007] Furthermore, the thickness of the pull-out pad is equal to the height of the socket, two sides of the pull-out pad slide in contact with the upright plate, and pull-out handles are installed on the other two sides.
[0008] Furthermore, the four uprights are connected by bolts, and the uprights are also connected to the base plate by bolts.
[0009] Furthermore, the notch on the bottom surface of the mold cavity is a round hole, and the column on the demolding plate is a cylinder. The notch on the bottom surface of the mold cavity is symmetrically distributed relative to the transverse centerline and longitudinal centerline of the bottom surface of the mold cavity.
[0010] Compared with the prior art, the advantages of this utility model are:
[0011] 1. The base plate has a round hole, and the demolding plate has a matching cylinder. When the specimen meets the demolding requirements, the tester can first pull out the pull-out pad, and then align the round hole at the bottom of the mold with the cylinder on the demolding plate. When demolding, the tester can directly press the pull handle, and the specimen can be easily removed by the pressure of the cylinder on the demolding plate. This effectively saves the tester's physical strength and time, and avoids the tester having to remove all the bolts on the mold to demold the specimen. This effectively saves the tester's physical strength and time, and improves the efficiency of the test.
[0012] 2. When molding the specimen, the pull-out pad can be inserted into the mold to ensure that the molded specimen meets the test requirements. At the same time, the material will not leak out when pressing the specimen due to the opening on the bottom surface of the mold cavity. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the pull-out pad and mold assembly;
[0014] Figure 2 This is a schematic diagram of the mold;
[0015] Figure 3 This is a schematic diagram of the base plate;
[0016] Figure 4 This is a schematic diagram of the demolding plate.
[0017] In the diagram: 1-Mold; 1.1-Mold cavity; 1.2-Notch; 1.3-Insert; 1.4-Upright plate; 1.5-Base plate; 2-Pull-out pad; 3-Demolding pressure plate; 3.1-Column; 4-Lifting handle; 5-Pull-out handle. Detailed Implementation
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] like Figures 1-4As shown: A molding die for asphalt mixture slab specimens includes a die 1, a pull-out pad 2, and a demolding pressure plate 3. The die 1 has a cavity 1.1 with an open top. The asphalt mixture specimen formed in the die 1 is demolded from the top of the die 1. The bottom surface of the cavity 1.1 has a through notch 1.2. The demolding pressure plate 3 has a column 3.1 that is adapted to the notch 1.2 on the bottom surface of the cavity 1.1. The column 3.1 is inserted into the notch 1.2 from bottom to top to push the asphalt mixture specimen out of the cavity 1.1. The side of the cavity 1.1 has an insertion port 1.3. The pull-out pad 2 can be inserted into the cavity 1.1 through the insertion port 1.3. The pull-out pad 2 serves as the bottom of the cavity 1.1 that can be pulled out.
[0020] Mold 1 includes four upright plates 1.4 and one base plate 1.5. Both the upright plates 1.4 and the base plate 1.5 are made of steel plates. The four upright plates 1.4 are connected to each other by bolts, and the upright plates 1.4 and the base plate 1.5 are also connected by bolts. The four upright plates 1.4 enclose the base plate 1.5 on all four sides, forming a mold cavity 1.1 in the middle. There is a gap between the bottom edges of two opposing upright plates 1.4 and the base plate 1.5, which serves as an insertion port 1.3. The bottom edges of the other two opposing upright plates 1.4 are connected to the base plate 1.5. The base plate 1.5 has a notch 1.2.
[0021] Lifting handles 4 are installed on the outer surfaces of the two upright plates 1.4 connected to the base plate 1.5. The mold 1 can be lifted or pressed down by lifting the handles 4.
[0022] The thickness of the pull-out pad 2 is equal to the height of the socket 1.3. Two sides of the pull-out pad 2 are slidably connected to the upright plate 1.4, and the other two sides are equipped with pull-out handles 5.
[0023] The notch 1.2 on the bottom surface of the mold cavity 1.1 is a round hole with a diameter of 50mm. The column 3.1 on the demolding plate 3 is a cylinder. The notch 1.2 on the bottom surface of the mold cavity 1.1 is symmetrically distributed with respect to the transverse centerline and longitudinal centerline of the bottom surface of the mold cavity 1.1.
[0024] During the test, the tester needs to insert the pull-out pad 2 into the mold 1 to ensure that the molded specimen meets the specifications and to prevent material leakage due to the opening at the bottom of the mold 1. When the specimen is ready for demolding, the tester first pulls out the pull-out pad 2 by pulling out the pull-out handle 5, then lifts the mold 1 and the undemolded specimen onto the demolding pressure plate 3 with the side with the column 3.1 facing upwards. Align the round hole on the bottom plate 1.5 of the mold 1 with the column 3.1 on the demolding pressure plate, and finally press the pull handle 4. The asphalt mixture specimen will be squeezed out of the mold 1 by the column 3.1, effectively saving the tester's physical strength and demolding time.
[0025] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A molding die for forming asphalt mixture slab-shaped specimens, characterized in that: It includes a mold (1), a pull-out pad (2), and a demolding pressure plate (3); the mold (1) has a mold cavity (1.1) with an open top, and a through notch (1.2) is opened on the bottom surface of the mold cavity (1.1). A column (3.1) is erected on the demolding pressure plate (3) to match the notch (1.2) on the bottom surface of the mold cavity (1.1). An insertion port (1.3) is opened on the side of the mold cavity (1.1). The pull-out pad (2) can be inserted into the mold cavity (1.1) through the insertion port (1.3). The pull-out pad (2) serves as the bottom of the mold cavity (1.1) that can be pulled out.
2. The asphalt mixture slab specimen molding die according to claim 1, characterized in that: The mold (1) includes four upright plates (1.4) and a base plate (1.5). The four upright plates (1.4) surround the base plate (1.5) on all four sides, forming a mold cavity (1.1) in the middle. The bottom edges of two opposing upright plates (1.4) are left with gaps between them and the base plate (1.5) as insertion slots (1.3). The bottom edges of the other two opposing upright plates (1.4) are connected to the base plate (1.5). The base plate (1.5) has a notch (1.2).
3. The asphalt mixture slab specimen molding die according to claim 2, characterized in that: Lifting handles (4) are installed on the outer surfaces of the two uprights (1.4) that are connected to the base plate (1.5).
4. The asphalt mixture slab specimen molding die according to claim 2, characterized in that: The thickness of the pull-out pad (2) is equal to the height of the socket (1.3). Two sides of the pull-out pad (2) are slidably connected to the upright plate (1.4), and pull-out handles (5) are installed on the other two sides.
5. The asphalt mixture slab specimen molding die according to claim 2, characterized in that: The four upright plates (1.4) are connected by bolts, and the upright plates (1.4) are connected to the base plate (1.5) by bolts.
6. The asphalt mixture slab specimen molding die according to claim 1, characterized in that: The notch (1.2) on the bottom surface of the mold cavity (1.1) is a round hole, and the column (3.1) on the demolding plate (3) is a cylinder. The notch (1.2) on the bottom surface of the mold cavity (1.1) is symmetrically distributed with respect to the transverse centerline and longitudinal centerline of the bottom surface of the mold cavity (1.1).