Powder tamping device for selective laser sintering and powder feeding cylinder

Abstract

The utility model relates to a powder tamping device for selective laser sintering and a powder feeding cylinder, and the powder tamping device for selective laser sintering comprises a cover plate, a powder feeding cylinder and a tamping device body, the sealing ring is arranged on the periphery of the cover plate; the vibration motor is mounted at the central position of the cover plate through a base; the number of the handles is at least one, and the handles are arranged on the cover plate. The powder tamping device for selective laser sintering is placed on the powder plane of the powder feeding cylinder added with powder, and the powder in the powder feeding cylinder can be rapidly and evenly tamped by starting the vibration motor; powder shortage of partial positions of a working area is avoided, and the working reliability of equipment is ensured; therefore, the processing and production cost is reduced, and the production efficiency of equipment is improved. Moreover, the powder tamping device for selective laser sintering is convenient to carry, does not occupy other redundant spaces and sites, and is low in input cost, simple and convenient in operation mode, safe and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of additive manufacturing, and in particular relates to a powder compacting device and a powder feeding cylinder for selective laser sintering. Background Art

[0002] Additive manufacturing technology is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Since it is not limited by the complexity of the part shape and does not require any tooling and molds, it has a very wide range of applications. As one of the additive manufacturing technologies, the selective laser sintering process has the following basic process: the powder feeding device delivers a certain amount of powder to the work surface, the powder spreading roller spreads a layer of powder material on the upper surface of the formed part of the forming cylinder, the heating device heats the powder to the set temperature, and the galvanometer system controls the laser to scan the solid part powder layer according to the cross-sectional profile of the layer, so that the powder melts and bonds with the formed part below; when a layer of cross section is sintered, the workbench drops a layer of thickness, and the powder spreading roller spreads a layer of uniform and dense powder on it, and scans and sinters a new layer of cross section, and after several layers of scanning and superposition, the entire prototype manufacturing is completed.

[0003] In the above technology, the powder feeding device is composed of a powder feeding cylinder and a roller, and the powder in the powder feeding cylinder is usually poured directly into the powder feeding cylinder by hand. The loose powder is usually fluffy and needs to be compacted with a wooden stick. However, the uneven density of the compacted powder often causes uneven powder feeding and powder shortage in some parts of the working area, resulting in sintering failure and the need to restart the machine. This increases the processing and production costs and reduces the production efficiency of the equipment. Utility Model Content

[0004] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides a powder compacting device for selective laser sintering. When the powder compacting device for selective laser sintering is placed on the powder surface of a powder feeding cylinder with powder added, the powder in the powder feeding cylinder can be compacted and evenly made quickly by starting a vibration motor. The method is simple and convenient, and powder shortage in some parts of the working area is avoided, thereby ensuring the working reliability of the equipment. The processing and production costs are thereby reduced, and the production efficiency of the equipment is improved.

[0005] In order to solve the above technical problems, the utility model provides a powder compacting device for selective laser sintering, which is placed on the powder surface in the powder feeding cylinder and is used to compact the powder. The powder compacting device includes:

[0006] A cover plate, the shape of which matches the shape of the cylinder body of the powder feeding cylinder;

[0007] A sealing ring is arranged around the cover plate;

[0008] a vibration motor, the vibration motor being mounted at a central position of the cover plate through a base; and

[0009] A handle, at least one in number, is disposed on the cover plate.

[0010] As a further preferred solution of the present invention, the base is mounted on the cover plate by a first bolt, and the vibration motor is mounted on the base.

[0011] As a further preferred solution of the present invention, the number of the handles is two, and the two handles are symmetrically arranged on both sides of the vibration motor through second bolts.

[0012] As a further preferred solution of the present invention, the sealing ring is made of rubber, and a surface thereof close to the cylinder wall of the powder feeding cylinder is in an arc shape.

[0013] As a further preferred embodiment of the present invention, the arc-shaped surface of the sealing ring is coated with lubricating oil so that the powder compacting device can smoothly contact the cylinder wall of the powder feeding cylinder.

[0014] As a further preferred embodiment of the present invention, the cover plate is made of aluminum profile and has a thickness of 15 mm.

[0015] As a further preferred embodiment of the present invention, the powder compacting device further comprises a timer and a leakage protection mechanism, and the timer and the leakage protection mechanism are both arranged on the power line of the vibration motor.

[0016] As a further preferred embodiment of the present invention, when the powder in the powder feeding cylinder is nylon powder, the single-phase voltage of the vibration motor is 220V, the power is 40W, and the exciting force is 25Kg.

[0017] The utility model also provides a powder feeding cylinder, comprising a cylinder body and any one of the above-mentioned powder compacting devices for selective laser sintering.

[0018] As a further preferred embodiment of the present invention, when the powder in the cylinder body needs to be compacted, the powder compacting device is placed on the powder surface in the cylinder body and fits against the cylinder wall of the forming cylinder.

[0019] The powder compacting device for selective laser sintering of the utility model includes: a cover plate, the shape of which matches the cylinder shape of the powder feeding cylinder; a sealing ring, which is arranged around the cover plate; a vibration motor, which is installed at the central position of the cover plate through a base; and a handle, at least one of which is arranged on the cover plate, so that when the powder compacting device for selective laser sintering is placed on the powder plane of the powder feeding cylinder with added powder, the powder in the powder feeding cylinder can be quickly compacted and evenly by starting the vibration motor, thereby avoiding the lack of powder in some positions of the working area and ensuring the working reliability of the equipment, thereby reducing the processing and production costs and improving the production efficiency of the equipment. Moreover, the powder compacting device of the utility model is easy to carry, does not occupy other redundant space and space, has low investment cost, is simple and convenient to operate, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of an embodiment of a powder compaction device for selective laser sintering provided by the utility model;

[0021] Figure 2 A schematic structural diagram of an embodiment of the powder feeding cylinder provided by the utility model;

[0022] Figure 3 for Figure 2 Schematic diagram of the structural decomposition.

[0023] The parts in the figure are marked as follows:

[0024] 1. Small bolts, 2. Large bolts, 3. Vibration motor, 4. Handle, 5. Base, 6. Powder feeding cylinder, 7. Cover plate, 8. Sealing ring. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, further detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1 The powder compacting device for selective laser sintering (hereinafter referred to as the powder compacting device) shown is placed on the powder surface in the powder feeding cylinder 6 to compact the powder. The powder compacting device includes:

[0027] A cover plate 7, the shape of which matches the shape of the cylinder body of the powder feeding cylinder 6;

[0028] A sealing ring 8 is arranged around the cover plate 7;

[0029] A vibration motor 3, wherein the vibration motor 3 is installed at the central position of the cover plate 7 through a base 5; the center of gravity of the entire powder compacting device is located at the relative center position of the cover plate 7, so that after the powder in the powder feeding cylinder 6 is compacted, the powder density is more uniform;

[0030] There is at least one handle 4 disposed on the cover plate 7. Preferably, there are two handles 4, which are symmetrically disposed on both sides of the vibration motor 3 through second bolts for moving the entire powder compacting device.

[0031] After all parts of the powder compacting device of the utility model are installed, they are placed on the upper surface of the powder in the powder feeding cylinder 6 filled with powder. After the vibration motor 3 is powered on, the powder in the powder feeding cylinder 6 can be compacted. The powder compacting device of the utility model has a simple structure and is easy to operate. Preferably, when the powder compacting device of the utility model is placed, it should be parallel to the powder filling plane of the powder feeding cylinder 6, so that the powder in the powder feeding cylinder 6 can be compacted and made more flat.

[0032] In a specific implementation, the vibration motor 3 can optimize the tamping time of different material powders by selecting different vibrator powers and exciting force weights. Preferably, when the powder in the powder feeding cylinder 6 is nylon powder, the single voltage of the vibration motor 3 is 220V, the power is 40W, and the exciting force is 25Kg.

[0033] In another specific implementation, the base 5 is mounted on the cover plate 7 by a first bolt, and the vibration motor 3 is mounted on the base 5. Of course, in a specific implementation, the base 5 can also be mounted on the cover plate 7 by other means, and the vibration motor 3 can be mounted on the base 5 by bolts or other means, which will not be described in detail here.

[0034] like Figure 1 As shown, the first bolt can be a large bolt 2, and the second bolt can be a small bolt 1.

[0035] Preferably, the sealing ring 8 is made of rubber, which can avoid the collision between the cover plate 7 and the powder feeding cylinder 6 and protect the cylinder wall of the powder feeding cylinder 6, and can also achieve a good sealing effect to avoid powder dust; further preferably, the side of the sealing ring 8 close to the cylinder wall of the powder feeding cylinder 6 is arc-shaped, so that when the powder compacting device is compacting the powder, a small amount of gas inside the powder feeding cylinder 6 can be discharged through the gap formed between the arc-shaped surface of the sealing ring 8 and the cylinder wall.

[0036] Further preferably, the arc-shaped surface of the sealing ring 8 is coated with lubricating oil so that the powder compacting device can smoothly contact the cylinder wall of the powder feeding cylinder 6 .

[0037] Preferably, the cover plate 7 is made of aluminum profile and has a thickness of 15 mm, so that the cover plate 7 can also perform preliminary extrusion and compaction on the powder plane of the powder feeding cylinder 6 by its own weight.

[0038] Further preferably, the powder compacting device also includes a timer and a leakage protection mechanism, and the timer and the leakage protection mechanism are both arranged on the power line of the vibration motor 3, so that the compacting time can be automatically controlled by the timer, and the powder compacting device can be made to work more safely and reliably by installing a leakage protection device.

[0039] The utility model also provides a powder feeding cylinder, comprising a cylinder body and a powder compacting device for selective laser sintering as described in any of the above embodiments. Figure 2 and Figure 3 As shown, when the powder in the cylinder body needs to be compacted, the powder compacting device is placed on the powder surface in the cylinder body and fits against the cylinder wall of the forming cylinder.

[0040] The size of the cover plate 7 is related to the cylinder size of the powder feeding cylinder 6 and the thickness of the sealing ring 8 , and the ultimate control effect to be achieved is that the edge of the sealing ring 8 fits exactly with the cylinder wall of the powder feeding cylinder 6 .

[0041] The above embodiments are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. It should be pointed out that some modifications and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A powder compaction device for selective laser sintering, characterized in that: It is placed on the powder surface in the powder feeding cylinder to compact the powder. The powder compacting device includes: A cover plate, the shape of which matches the shape of the cylinder body of the powder feeding cylinder; A sealing ring is arranged around the cover plate; a vibration motor, the vibration motor being mounted at a central position of the cover plate through a base; and A handle, at least one in number, is disposed on the cover plate.

2. The powder compaction device for selective laser sintering according to claim 1, characterized in that: The base is mounted on the cover plate through a first bolt, and the vibration motor is mounted on the base.

3. The powder compaction device for selective laser sintering according to claim 1, characterized in that: The number of the handles is two, and the two handles are symmetrically arranged on both sides of the vibration motor through second bolts.

4. The powder compaction device for selective laser sintering according to claim 1, characterized in that: The sealing ring is made of rubber, and one side of the sealing ring close to the cylinder wall of the powder feeding cylinder is in an arc shape.

5. The powder compaction device for selective laser sintering according to claim 4, characterized in that: The arc-shaped surface of the sealing ring is coated with lubricating oil so that the powder compacting device can smoothly contact with the cylinder wall of the powder feeding cylinder.

6. The powder compaction device for selective laser sintering according to claim 1, characterized in that: The cover plate is made of aluminum profile and has a thickness of 15 mm.

7. The powder compaction device for selective laser sintering according to claim 1, characterized in that: The powder compacting device also includes a timer and a leakage protection mechanism, and the timer and the leakage protection mechanism are both arranged on the power line of the vibration motor.

8. The powder compaction device for selective laser sintering according to claim 1, characterized in that: When the powder in the powder feeding cylinder is nylon powder, the single-phase voltage of the vibration motor is 220V, the power is 40W, and the exciting force is 25Kg.

9. A powder feeding cylinder, characterized in that: The invention comprises a cylinder body and a powder compacting device for selective laser sintering according to any one of claims 1 to 8.

10. The powder feeding cylinder according to claim 9, characterized in that: When the powder in the cylinder body needs to be compacted, the powder compacting device is placed on the powder surface in the cylinder body and fits against the cylinder wall of the forming cylinder.

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