In-situ preheating device for 4D printing composite material

Abstract

The utility model discloses an in-situ preheating device for a 4D printing composite material, and relates to the technical field of 4D printing. The wire cutting device comprises a mounting seat, a laser head is fixedly mounted on the outer surface of the mounting seat, a support is fixedly mounted at the top of the mounting seat, an adjusting assembly and a wire feeding assembly are arranged on the outer surface of the support, a wire cutting assembly is arranged at the bottom of the mounting seat, and a clamping assembly is arranged on the outer surface of the wire cutting assembly. The adjusting assembly is used for adjusting the size of the wire feeding assembly, and the wire feeding assembly is used for driving the prepreg wires to conduct movable wire feeding. Through connection of the adjusting assembly and the wire feeding assembly, when the adjusting assembly is rotated, the adjusting assembly converts rotary motion into linear motion and pushes the wire feeding assembly to do linear motion at the same time, so that the wire feeding assembly can be folded or separated, and gaps in the wire feeding assembly are changed; therefore, the wire feeding assembly can be in close contact with different prepreg wires to ensure the accuracy of a wire feeding path.

Description

Technical Field

[0001] This utility model belongs to the field of 4D printing technology, and specifically relates to an in-situ preheating device for 4D printing composite materials. Background Technology

[0002] 4D printing technology introduces a time dimension to 3D printing, enabling printed structures to undergo controllable shape or functional changes under external stimuli (such as heat, light, electricity, and magnetic fields). This technology achieves a breakthrough in structural dynamic response capabilities through the combination of smart materials (such as shape memory polymers, liquid crystal elastomers, and ceramic precursors) and additive manufacturing processes, showing broad prospects in aerospace, flexible robotics, and biomedicine.

[0003] In the 4D printing process, the preheating of prepreg filament is a key step to ensure uniform melting, interfacial bonding, and controllable deformation of the material. Currently, most preheating devices use a laser head with a fixed filament feeding wheel. Laser preheating requires high precision in the filament feeding path. If the filament feeding wheel is not in close contact with the prepreg filament, it can easily lead to heat loss or local overheating, affecting the consistency of material properties. Different prepreg filaments have different diameters, hardness, etc., requiring frequent replacement of the filament feeding wheel, which is quite troublesome. Utility Model Content

[0004] To address the problems that if the feed rollers and prepreg filaments do not make close contact, heat loss or local overheating can easily occur, affecting the consistency of material properties, and that different prepreg filaments require frequent replacement of feed rollers due to differences in diameter, hardness, etc., which is quite troublesome, this utility model proposes an in-situ preheating device for 4D printing composite materials to overcome the above-mentioned technical problems existing in the relevant technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to an in-situ preheating device for 4D printing composite materials, comprising a mounting base, a laser head fixedly mounted on the outer surface of the mounting base, a bracket fixedly mounted on the top of the mounting base, an adjustment component and a filament feeding component provided on the outer surface of the bracket, a filament cutting component provided at the bottom of the mounting base, and a clamping component provided on the outer surface of the filament cutting component. The adjustment component is used to adjust the size of the filament feeding component, the filament feeding component is used to drive the prepreg filament to move and feed, and the filament cutting component is used to cut the prepreg filament.

[0007] Furthermore, the adjustment assembly includes a first bidirectional screw, which is rotatably connected to the outer surface of the bracket. The outer surface of the first bidirectional screw is threaded with a first adjustment plate and a second adjustment plate, respectively. The outer surfaces of the first adjustment plate and the second adjustment plate are each rotatably connected with a rotating ring.

[0008] Furthermore, the wire feeding assembly includes a rotating shaft, which is rotatably connected to the outer surface of the bracket. The outer surface of the rotating shaft is provided with a sliding groove, and a sliding circular plate is slidably connected to the rotating shaft through the sliding groove. There are two sets of sliding circular plates, and the two sets of sliding circular plates are respectively fixedly connected to two sets of rotating rings. The rotating rings are slidably connected to the rotating shaft through the sliding groove.

[0009] Furthermore, the shredding assembly includes an electric push rod, the movable end of which is fixedly connected to a connecting plate, the outer surface of which is threaded with bolts, the connecting plate being fixedly connected to a connecting frame by bolts, and the connecting frame being fixedly mounted with a cutter by a clamping assembly, the cutter being slidably connected to a mounting base.

[0010] Furthermore, the clamping assembly includes a second bidirectional screw, which is rotatably connected to the connecting frame. The outer surface of the second bidirectional screw is threaded with a first sliding plate and a second sliding plate, respectively. The first sliding plate and the second sliding plate are slidably connected to the connecting frame. The outer surfaces of the first sliding plate and the second sliding plate are fixedly connected with an upper clamping plate and a lower clamping plate, respectively. The cutter is located between the upper clamping plate and the lower clamping plate.

[0011] Furthermore, a mounting bracket is fixedly mounted on the outer surface of the mounting base, and the electric push rod is fixedly mounted on the outer surface of the mounting bracket.

[0012] Furthermore, handwheels are fixedly connected to the outer surfaces of both the first and second bidirectional screws.

[0013] This utility model has the following beneficial effects:

[0014] This invention, through the connection between the adjustment component and the wire feeding component, allows the adjustment component to convert rotational motion into linear motion when rotated. Simultaneously, the adjustment component pushes the wire feeding component to perform linear motion, thereby enabling the wire feeding component to close or separate, thus changing the gap on the wire feeding component. This allows the wire feeding component to maintain close contact with different prepreg yarns to ensure the accuracy of the wire feeding path.

[0015] This invention connects the second bidirectional screw and the first sliding plate. When the first bidirectional screw is rotated, the first and second sliding plates drive the upper and lower clamping plates to move. The upper and lower clamping plates simultaneously apply pressure to the cutter from both the upper and lower sides, which can limit and fix the cutter. When the upper and lower clamping plates move away from the cutter, the cutter is no longer limited by the upper and lower clamping plates, and the cutter can be removed for maintenance and replacement.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a top view of the structure of this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model from below. Figure 1 ;

[0020] Figure 3 This is a top view of the structure of this utility model. Figure 2 ;

[0021] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 5 This is a schematic diagram of the structure of this utility model from below. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the shredding assembly of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Mounting base; 2. Laser head; 3. Bracket; 4. Adjustment assembly; 401. First bidirectional screw; 402. First adjusting plate; 403. Second adjusting plate; 404. Rotating ring; 5. Wire feeding assembly; 501. Rotating shaft; 502. Slide groove; 503. Sliding circular plate; 6. Wire cutting assembly; 601. Electric push rod; 602. Connecting plate; 603. Bolt; 604. Connecting frame; 605. Cutter; 7. Clamping assembly; 701. Second bidirectional screw; 702. First sliding plate; 703. Second sliding plate; 704. Upper clamping plate; 705. Lower clamping plate; 8. Mounting frame; 9. Handwheel. Detailed Implementation

[0026] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0027] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0028] Please see Figures 1-6 As shown, this utility model is an in-situ preheating device for 4D printing composite materials, including a mounting base 1. A laser head 2 is fixedly mounted on the outer surface of the mounting base 1. A bracket 3 is fixedly mounted on the top of the mounting base 1. An adjustment component 4 and a filament feeding component 5 are provided on the outer surface of the bracket 3. A filament cutting component 6 is provided at the bottom of the mounting base 1. A clamping component 7 is provided on the outer surface of the filament cutting component 6. The adjustment component 4 is used to adjust the size of the filament feeding component 5. The filament feeding component 5 is used to drive the prepreg filament to move and feed the filament. The filament cutting component 6 is used to cut the prepreg filament.

[0029] The prepreg filament is inserted into the mounting base 1 through the filament feeding assembly 5. The adjusting assembly 4 is rotated, which moves the filament feeding assembly 5 so that it closes and gets close to the prepreg filament, ensuring the accuracy of the filament feeding path. The laser head 2 is activated to preheat the prepreg filament below the mounting base 1. The preheated prepreg filament is then ejected from below the mounting base 1. The filament cutting assembly 6 is activated, and it slides within the mounting base 1 to cut the prepreg filament, thus separating the unmelted prepreg filament from the molten prepreg filament. After disassembling the clamping assembly 7, the cutting parts inside the filament cutting assembly 6 can be maintained or replaced.

[0030] This invention, through the connection between the adjusting component 4 and the wire feeding component 5, allows the adjusting component 4 to convert rotational motion into linear motion when rotated. Simultaneously, the adjusting component 4 pushes the wire feeding component 5 to perform linear motion, thereby enabling the wire feeding component 5 to close or separate, thus changing the gap on the wire feeding component 5. This allows the wire feeding component 5 to maintain close contact with different prepreg yarns to ensure the accuracy of the wire feeding path.

[0031] In one embodiment, the adjustment component 4 includes a first bidirectional screw 401, which is rotatably connected to the outer surface of the bracket 3. The outer surface of the first bidirectional screw 401 is threadedly connected to a first adjustment plate 402 and a second adjustment plate 403, respectively. The outer surfaces of the first adjustment plate 402 and the second adjustment plate 403 are rotatably connected to a rotating ring 404.

[0032] When the first adjusting plate 402 and the second adjusting plate 403 can only slide, the first bidirectional screw 401 is rotated, which drives the first adjusting plate 402 and the second adjusting plate 403 to move. At this time, the first adjusting plate 402 and the second adjusting plate 403 can move closer to or further away from each other at the same time.

[0033] In one embodiment, the wire feeding assembly 5 includes a rotating shaft 501, which is rotatably connected to the outer surface of the bracket 3. A groove 502 is provided on the outer surface of the rotating shaft 501. A sliding circular plate 503 is slidably connected to the rotating shaft 501 through the groove 502. There are two sets of sliding circular plates 503. The two sets of sliding circular plates 503 are respectively fixedly connected to two sets of rotating rings 404. The rotating rings 404 are slidably connected to the rotating shaft 501 through the groove 502.

[0034] The rotational tendency of the first adjusting plate 402 and the second adjusting plate 403 is blocked by the rotating shaft 501. At this time, the first bidirectional screw 401 drives the first adjusting plate 402 and the second adjusting plate 403 to move along the rotating shaft 501. The first adjusting plate 402 and the second adjusting plate 403 drive the two sets of sliding circular plates 503 to slide along the grooves 502 on the surface of the rotating shaft 501, so that the two sets of sliding circular plates 503 can move closer or further away from each other at the same time, so that the two sets of sliding circular plates 503 can fully contact the prepreg yarn. The rotating shaft 501 drives the sliding circular plates 503 to rotate through the grooves 502 to realize the yarn feeding operation. The sliding circular plates 503 drive the rotating ring 404 to rotate. At this time, the first adjusting plate 402 and the second adjusting plate 403 on the rotating ring 404 remain stationary to avoid the first adjusting plate 402 and the second adjusting plate 403 from hindering the rotation of the sliding circular plates 503.

[0035] In one embodiment, the shredding assembly 6 includes an electric push rod 601, the movable end of which is fixedly connected to a connecting plate 602, the outer surface of which is threaded with a bolt 603, the connecting plate 602 being fixedly connected to a connecting frame 604 via the bolt 603, and the connecting frame 604 being fixedly mounted with a cutter 605 via a clamping assembly 7, the cutter 605 being slidably connected to the mounting base 1.

[0036] When slicing is required, the electric push rod 601 is activated. The movable end of the electric push rod 601 pushes the connecting plate 602 to move. The connecting plate 602 pushes the connecting frame 604 and the cutter 605 to move, so that the cutter 605 slides inside the mounting base 1. During the sliding process, the blade of the cutter 605 cuts the pre-impregnated filaments.

[0037] In one embodiment, the clamping assembly 7 includes a second bidirectional screw 701, which is rotatably connected to the connecting frame 604. The outer surface of the second bidirectional screw 701 is threaded with a first sliding plate 702 and a second sliding plate 703, respectively. The first sliding plate 702 and the second sliding plate 703 are slidably connected to the connecting frame 604. The outer surfaces of the first sliding plate 702 and the second sliding plate 703 are fixedly connected with an upper clamping plate 704 and a lower clamping plate 705, respectively. The cutter 605 is located between the upper clamping plate 704 and the lower clamping plate 705.

[0038] Rotating the second bidirectional screw 701, the rotational tendency of the first sliding plate 702 and the second sliding plate 703 on the second bidirectional screw 701 is blocked by the connecting frame 604. At this time, the second bidirectional screw 701 can drive the first sliding plate 702 and the second sliding plate 703 to move. The first sliding plate 702 and the second sliding plate 703 respectively drive the upper clamping plate 704 and the lower clamping plate 705 to move. When the upper clamping plate 704 and the lower clamping plate 705 are close to each other, the cutter 605 can be clamped and fixed. When the upper clamping plate 704 and the lower clamping plate 705 are far apart, the cutter 605 can be released. Disassembly and assembly are relatively convenient, and maintenance and replacement are easy.

[0039] In one embodiment, for the aforementioned mounting base 1, a mounting bracket 8 is fixedly mounted on the outer surface of the mounting base 1, and the electric push rod 601 is fixedly mounted on the outer surface of the mounting bracket 8.

[0040] Mounting bracket 8 provides a fixed position for mounting electric actuator 601, so that electric actuator 601 remains stable during operation.

[0041] In one embodiment, for the first bidirectional screw 401, a handwheel 9 is fixedly connected to the outer surface of both the first bidirectional screw 401 and the second bidirectional screw 701.

[0042] The handwheel 9 is designed to provide a point of force for rotating the first bidirectional screw 401 and the second bidirectional screw 701, while also being easy to grip and preventing slippage.

[0043] Through the above technical solution, 1. By adjusting the connection between the adjusting component 4 and the wire feeding component 5, when the adjusting component 4 is rotated, the adjusting component 4 converts the rotational motion into linear motion. Simultaneously, the adjusting component 4 pushes the wire feeding component 5 to perform linear motion, thereby enabling the wire feeding component 5 to close or separate, thus changing the gap on the wire feeding component 5. This allows the wire feeding component 5 to maintain close contact with different prepreg yarns to ensure the accuracy of the wire feeding path; 2. Through the connection between the second bidirectional screw 701 and the first sliding plate 702, rotation... When the first bidirectional screw 701 is in operation, the first sliding plate 702 and the second sliding plate 703 drive the upper clamping plate 704 and the lower clamping plate 705 to move. The upper clamping plate 704 and the lower clamping plate 705 simultaneously apply pressure to the cutter 605 from the upper and lower sides, which can limit and fix the cutter 605. When the upper clamping plate 704 and the lower clamping plate 705 move away from the cutter 605, the cutter 605 is no longer limited by the upper clamping plate 704 and the lower clamping plate 705, and the cutter 605 can be removed for maintenance and replacement.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An in-situ preheating device for 4D printing composites comprising a mounting base (1), characterized in that, A laser head (2) is fixedly mounted on the outer surface of the mounting base (1). A bracket (3) is fixedly mounted on the top of the mounting base (1). An adjustment component (4) and a wire feeding component (5) are provided on the outer surface of the bracket (3). A wire cutting component (6) is provided at the bottom of the mounting base (1). A clamping component (7) is provided on the outer surface of the wire cutting component (6). The adjustment component (4) is used to adjust the size of the wire feeding component (5). The wire feeding component (5) is used to drive the prepreg wire to move and feed the wire. The wire cutting component (6) is used to cut the prepreg wire.

2. The in-situ preheating device of a 4D printing composite material according to claim 1, characterized in that, The adjustment assembly (4) includes a first bidirectional screw (401), which is rotatably connected to the outer surface of the bracket (3). The outer surface of the first bidirectional screw (401) is threaded with a first adjustment plate (402) and a second adjustment plate (403). The outer surfaces of the first adjustment plate (402) and the second adjustment plate (403) are rotatably connected with rotating rings (404).

3. The in-situ preheating device of a 4D printing composite material according to claim 2, characterized in that, The wire feeding assembly (5) includes a rotating shaft (501), which is rotatably connected to the outer surface of the bracket (3). A groove (502) is provided on the outer surface of the rotating shaft (501). A sliding circular plate (503) is slidably connected to the rotating shaft (501) through the groove (502). There are two sets of sliding circular plates (503). The two sets of sliding circular plates (503) are respectively fixedly connected to two sets of rotating rings (404). The rotating rings (404) are slidably connected to the rotating shaft (501) through the groove (502).

4. The in-situ preheating device of a 4D printing composite material according to claim 3, characterized in that, The shredding assembly (6) includes an electric push rod (601), the movable end of which is fixedly connected to a connecting plate (602), the outer surface of which is threaded with a bolt (603), the connecting plate (602) is fixedly connected to a connecting frame (604) by the bolt (603), the connecting frame (604) is fixedly mounted with a cutter (605) by a clamping assembly (7), and the cutter (605) is slidably connected to the mounting base (1).

5. The in-situ preheating device of a 4D printed composite material according to claim 4, characterized in that, The clamping assembly (7) includes a second bidirectional screw (701), which is rotatably connected to the connecting frame (604). The outer surface of the second bidirectional screw (701) is threaded with a first sliding plate (702) and a second sliding plate (703). The first sliding plate (702) and the second sliding plate (703) are slidably connected to the connecting frame (604). The outer surfaces of the first sliding plate (702) and the second sliding plate (703) are fixedly connected with an upper clamping plate (704) and a lower clamping plate (705). The cutter (605) is located between the upper clamping plate (704) and the lower clamping plate (705).

6. An in-situ preheating device for 4D printed composite material according to claim 5, characterized in that, The mounting bracket (8) is fixedly mounted on the outer surface of the mounting base (1), and the electric push rod (601) is fixedly mounted on the outer surface of the mounting bracket (8).

7. The in-situ preheating device of a 4D printing composite material according to claim 6, characterized in that, Handwheels (9) are fixedly connected to the outer surfaces of the first bidirectional screw (401) and the second bidirectional screw (701).

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