Molding sand air permeability sample compacting machine

Abstract

The utility model relates to the technical field of sample preparation, in particular to a molding sand breathable sample compacting machine. Comprising a machine table and a rack, the rack is arranged on the rear side of the top of the machine table, a driving air cylinder is arranged on the top of the rack, a round pressing head is arranged at the piston rod end of the driving air cylinder, a containing plate is further arranged in the middle of the front side wall of the rack, a sample barrel is placed on the containing plate, and a telescopic bearing mechanism is arranged on the top of the machine table. And the upper end of the telescopic bearing mechanism is positioned in the sample cylinder. According to the utility model, the compaction force of the circular pressure head on molding sand is stable, so that the compaction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sample preparation, in particular to a molding sand air permeability sample compactor. Background Art

[0002] When testing the air permeability of molding sand, it is usually necessary to prepare multiple sand mold samples after mixing molding sand in a certain ratio, and test the air permeability of multiple sand mold samples respectively to obtain the average air permeability of the molding sand under this ratio. For example, a molding sand air permeability detection device with publication number CN205080031U uses a sample tube carrying a compacted molding sand sample to perform an air permeability test.

[0003] However, the existing compactor has a poor compaction effect during the compaction of the molding sand, and cannot ensure that the molding sand sample is located in the middle of the sample tube to facilitate subsequent air permeability testing. Utility Model Content

[0004] The utility model aims to provide a molding sand air permeability sample compactor, which can ensure that the compaction force of the circular pressure head on the molding sand is stable, thereby improving the compaction effect.

[0005] In order to solve the above technical problems, the utility model provides a molding sand permeability sample compacting machine, including a machine platform and a frame, the frame is provided on the top rear side of the machine platform, a driving cylinder is provided on the top of the frame, a circular pressure head is provided on the piston rod end of the driving cylinder, a placement plate is also provided in the middle part of the front side wall of the frame, a sample tube is placed on the placement plate, a telescopic receiving mechanism is provided on the top of the machine platform, and the upper end of the telescopic receiving mechanism is located inside the sample tube.

[0006] Preferably, the placement plate further includes a circular placement groove, and the circular placement groove is a step through groove.

[0007] Preferably, the sample tube is a cylindrical tube with openings at both upper and lower ends.

[0008] Preferably, the telescopic bearing mechanism includes: a fixed sleeve, a movable shaft, a socket head, a compression spring, an electromagnet 1 and an electromagnet 2; the movable shaft is slidably inserted into the upper end of the fixed sleeve, the socket head is provided at the upper end of the movable shaft, the compression spring is provided at the lower end of the movable shaft, the lower end of the compression spring is connected to the bottom of the inner cavity of the fixed sleeve, and the electromagnet 1 and the electromagnet 2 are symmetrically arranged at the lower end of the movable shaft and the bottom of the inner cavity of the fixed sleeve, respectively.

[0009] Preferably, it further comprises a pressure sensor, wherein the pressure sensor is arranged between the socket and the movable shaft.

[0010] Preferably, it further comprises a controller, wherein the controller is electrically connected to the driving cylinder, the first electromagnet, the second electromagnet and the pressure sensor respectively.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model adopts air drive to provide compaction force, and under the action of the above-mentioned socket and the circular pressure head, the compaction effect of the molding sand sample is improved, and the downward movement of the telescopic receiving mechanism is ensured to ensure that the molding sand sample is in the middle of the sample tube. At the same time, through the setting of the pressure sensor, the purpose of intelligent control can be achieved, ensuring that the compaction force of the circular pressure head on its molding sand is stable, thereby further improving the compaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural front view of the utility model.

[0014] Figure 2 This is a structural section view of the utility model Figure 1 .

[0015] Figure 3 This is a structural section view of the utility model Figure 2 .

[0016] In the figure: 1-machine table, 2-frame, 3-driving cylinder, 4-circular pressure head, 5-placing plate, 51-circular placement slot, 52-sample tube, 6-telescopic receiving mechanism, 61-fixed sleeve, 62-moving shaft, 63-supporting head, 64-compression spring, 65-electromagnet 1, 66-electromagnet 2, 67-pressure sensor. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0018] like Figure 1-3 As shown, the utility model specifically discloses a molding sand permeability sample compactor, including a machine platform 1 and a frame 2. The frame 2 is provided on the top rear side of the machine platform 1, and a driving cylinder 3 is provided on the top of the frame 2. A circular pressure head 4 is provided at the piston rod end of the driving cylinder 3. A placement plate 5 is also provided in the middle of the front side wall of the frame 2, and a sample tube 52 is placed on the placement plate 5. A telescopic receiving mechanism 6 is provided on the top of the machine platform 1, and the upper end of the telescopic receiving mechanism 6 is located inside the sample tube 52.

[0019] The placement plate 5 further includes a circular placement groove 51 , and the circular placement groove 51 is a stepped through groove, which is convenient for positioning and placing the sample tube 52 and provides an escape space for the receiving head 63 of the telescopic receiving mechanism 6 .

[0020] The sample tube 52 is a cylindrical tube with openings at both ends, providing an insertion space for the circular pressure head 4 and the socket 63 .

[0021] The telescopic receiving mechanism 6 comprises: a fixed sleeve 61, a movable shaft 62, a socket 63, a compression spring 64, an electromagnet 1 65 and an electromagnet 2 66; the upper end of the fixed sleeve 61 is slidably plugged with the movable shaft 62, the upper end of the movable shaft 62 is provided with a socket 63, the lower end of the movable shaft 62 is provided with a compression spring 64, the lower end of the compression spring 64 is connected to the bottom of the inner cavity of the fixed sleeve 61, and the electromagnet 1 65 and the electromagnet 2 66 are symmetrically arranged at the lower end of the movable shaft 62 and the bottom of the inner cavity of the fixed sleeve 61, respectively. When the telescopic receiving mechanism 6 is used, when the downward pressure of the circular pressure head 4 compacts the molding sand, its force acts on the socket 63, causing it to move downward, compressing the compression spring 64, and ensuring that the molding sand sample is in the middle of the sample tube 52. And through the force of the socket 63 and the circular pressure head 4, the compaction effect of the molding sand sample is improved. When the socket head 63 moves down to the lowest position, the electromagnet 1 65 and the electromagnet 2 66 are energized at the same time. Since the magnetism of the electromagnet 1 65 and the electromagnet 2 66 is opposite, they can be magnetically attracted to each other and the socket head 63 is always in the lowest position, avoiding damage to the compacted sand sample when the socket head 63 returns to the highest position.

[0022] It also includes a pressure sensor 67, which is arranged between the socket 63 and the moving shaft 62. It also includes a controller, which is electrically connected to the driving cylinder 3, the electromagnet 1 65, the electromagnet 2 66 and the pressure sensor 67. Through the setting of the pressure sensor 67, the force of the circular pressure head 4 on the socket 63 can be detected in real time. When the force reaches the preset threshold of the controller, the driving cylinder 3 can be controlled to stop the extension action and return to the original position, and the electromagnet 1 65 and the electromagnet 2 66 can be energized synchronously to make the socket 63 always in the lowest position. At this time, the sample tube 52 can be taken out. After the sample tube 52 is taken out, the electromagnet 1 65 and the electromagnet 2 66 are de-energized to make the socket 63 return to its position under the force of the compression spring 64.

[0023] It also includes the following usage process: first, place the sample tube 52 in the placement groove, then fill a certain amount of molding sand into the sample tube 52, and then control the driving cylinder 3 to move, drive the circular pressure head 4 to press down, so that the molding sand is compacted into a cylindrical sample, and through the setting of the above-mentioned telescopic supporting mechanism 6, the downward pressure of the circular pressure head 4 can be buffered and supported, and at the same time, through the downward movement of the telescopic supporting mechanism 6, it is ensured that the molding sand sample is in the middle of the sample tube 52, and then the sample tube 52 carrying the molding sand sample can be taken out.

[0024] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A molding sand permeability sample compactor, comprising a machine platform (1) and a frame (2), wherein the frame (2) is provided at the top rear side of the machine platform (1), characterized in that: A driving cylinder (3) is provided on the top of the frame (2), a circular pressure head (4) is provided at the piston rod end of the driving cylinder (3), a placement plate (5) is provided in the middle of the front side wall of the frame (2), a sample tube (52) is placed on the placement plate (5), a telescopic receiving mechanism (6) is provided on the top of the machine platform (1), and the upper end of the telescopic receiving mechanism (6) is located inside the sample tube (52).

2. A molding sand permeability sample compactor as claimed in claim 1, characterized in that: The placement plate (5) further comprises a circular placement groove (51) which is provided on the placement plate, and the circular placement groove (51) is a stepped through groove.

3. A molding sand permeability sample compactor as claimed in claim 1, characterized in that: The sample tube (52) is a cylindrical tube with openings at both the upper and lower ends.

4. A molding sand permeability sample compactor as claimed in claim 1, characterized in that: The telescopic receiving mechanism (6) comprises: a fixed sleeve (61), a movable shaft (62), a socket head (63), a compression spring (64), an electromagnet 1 (65) and an electromagnet 2 (66); the movable shaft (62) is slidably inserted into the upper end of the fixed sleeve (61), the socket head (63) is provided at the upper end of the movable shaft (62), the compression spring (64) is provided at the lower end of the movable shaft (62), the lower end of the compression spring (64) is connected to the bottom of the inner cavity of the fixed sleeve (61), and the electromagnet 1 (65) and the electromagnet 2 (66) are symmetrically arranged at the lower end of the movable shaft (62) and the bottom of the inner cavity of the fixed sleeve (61), respectively.

5. A molding sand permeability sample compactor as claimed in claim 4, characterized in that: It also includes a pressure sensor (67), which is arranged between the socket (63) and the moving shaft (62).

6. A molding sand permeability sample compactor as claimed in claim 5, characterized in that: It also includes a controller, which is electrically connected to the driving cylinder (3), the first electromagnet (65), the second electromagnet (66) and the pressure sensor (67) respectively.

Images