Buffer device for 3D printing synchronous feeding and 3D printer

Abstract

The utility model relates to the technical field of 3D printing, and provides a buffer device for 3D printing synchronous feeding and a 3D printer, the buffer device comprises a fixed body and a movable body, a channel for consumable items to pass through is arranged in the movable body, and the movable body is arranged in the fixed body and is configured to move in the fixed body. The floating guide pipe moving body and the fixed sleeve fixing body are arranged, the floating guide pipe moving body moves in the fixed sleeve fixing body and induces with the induction piece, and no matter the floating guide pipe has speed difference, the moving body moves in any direction, so that the floating guide pipe can move in any direction. An induction sheet positioned on a floating guide pipe moving body triggers a sensor positioned on a circuit board, so that feeding motors in front of and behind the buffer device synchronously work in a negative feedback regulation manner; accurate synchronous feeding is achieved, the consumables can smoothly enter the hot end of the printer through the Teflon pipe to be printed, and the situation that the consumables are prone to being extruded and stretched in 3D printing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and particularly relates to a buffer device for synchronous feeding in 3D printing. Background Art

[0002] In fused deposition 3D printing technology, multi-color 3D printing is generally achieved by directly extracting the original consumables and then loading the required color consumables. In this process, two or more feeding motors often work synchronously to enable the consumables to smoothly pass through the Teflon tube and enter the hot end of the 3D printer for printing. However, due to the inability of two or more feeding motors to achieve precise synchronous feeding, the consumables are prone to being squeezed and stretched during two-color printing. In view of this, a buffer device for synchronous feeding in 3D printing is proposed, which realizes the synchronous movement of the consumables by feedback regulation of two or more feeding motors working together. Summary of the Utility Model

[0003] In order to achieve the above object, the utility model provides the following technical solutions:

[0004] The utility model provides a buffer device for synchronous feeding in 3D printing, which includes a fixed body and a moving body. A channel for the consumables to pass through is arranged in the moving body, and the moving body is configured to be movable within the fixed body.

[0005] Further, an induction sheet is arranged on the moving body, and the induction sheet is configured to move along with the moving body. Preferably, a guiding groove can be arranged on the fixed body, and the induction sheet can move within the guiding groove driven by the moving body. The induction sheet is used to indicate the position of the moving body, and the induction sheet can be integrally arranged with the moving body, or the induction sheet can be sleeved on the moving body or fixed on the moving body. For example, when the induction sheet is sleeved on the moving body, the induction sheet includes a sleeve ring part and an induction part. In order to make the induction sheet sleeved on the moving body more firmly, external threads can be arranged on the moving body, and correspondingly, internal threads are arranged on the sleeve ring part, and the induction sheet and the moving body are fixed by threads.

[0006] Further, a first elastic member is connected to one side of the induction sheet, and a second elastic member is connected to the other side. The induction sheet returns to the initial position under the action of the first elastic member and / or the second elastic member. Preferably, one end of the first elastic member is connected to one side of the induction sheet, and the other end of the first elastic member is connected to the fixed body. One end of the second elastic member is connected to the other side of the induction sheet, and the other end of the second elastic member is connected to the moving body. When the moving body moves, the moving body (induction sheet) is restored to the initial position under the elastic force of the first elastic member and / or the second elastic member.

[0007] Further, it further includes a circuit board, on which a sensor is provided, and the sensor is configured to adjust the working speed of the feeding motor for extruding the consumable after induction with the induction sheet.

[0008] Further, the sensor includes a first sensor.

[0009] Further, the sensor includes a second sensor.

[0010] Further, the initial position of the induction sheet is located at a position other than the first sensor or between the first sensor and the second sensor.

[0011] Further, one end of the moving body is connected with a pneumatic quick connector.

[0012] Further, a first through hole only for the consumable to pass through is provided at one end of the fixed body, and a pneumatic quick connector is connected at the first through hole.

[0013] Preferably, a power supply port is further provided on the circuit board for providing a power supply function to the circuit board.

[0014] The present utility model further provides a 3D printer, including the above-mentioned buffer device.

[0015] The present utility model has the following beneficial effects:

[0016] The present utility model is provided with a moving body and a fixed body. The moving body moves in the fixed body and makes induction with the induction sheet. When there is a speed difference, the moving body moves, and the induction sheet located on the moving body will trigger the sensor located on the circuit board, adjusting the synchronous operation of the feeding motors before and after the buffer device, realizing precise synchronous feeding, enabling the consumable to smoothly pass through the Teflon tube and enter the hot end of the printer for printing, and avoiding the situation that the consumable is easily squeezed and stretched during 3D printing. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present utility model.

[0018] Figure 2 is Figure 1 the sectional view of

[0019] Figure 3 is a schematic diagram of the induction sheet in the present utility model.

[0020] Figure 4 is a schematic diagram of the moving body in the present utility model.

[0021] Figure 5 is a schematic diagram of the fixed body in the present utility model.

[0022] Figure 6It is a state diagram of the moving body moving to the right due to the speed difference in the present utility model.

[0023] Figure 7 It is a state diagram of the moving body moving to the left due to the speed difference in the present utility model. Specific embodiments

[0024] The following describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings. It should be noted that the embodiments are only specific elaborations of the utility model and should not be regarded as limitations of the utility model. The purpose of the embodiments is to enable those skilled in the art to better understand and reproduce the technical solutions of the present utility model. The protection scope of the present utility model should still be subject to the scope defined by the claims.

[0025] As Figure 1-2 shown, the present utility model provides a buffer device for synchronous feeding in 3D printing, including a fixed body 1 and a moving body 2. A channel 20 for consumables to pass through is provided in the moving body 2, and the moving body 2 is configured to be movable within the fixed body 1. A guiding groove 10 is provided on the fixed body 1. An induction sheet 3 is provided on the moving body 2, and the induction sheet 3 is configured to move along with the moving body; preferably, a guiding groove can be provided on the fixed body, and the induction sheet can move in the guiding groove 10 driven by the moving body 2; the induction sheet 3 is used to indicate the position of the moving body 2, and the induction sheet 3 can be integrally provided with the moving body 2 or the induction sheet 3 can be sleeved on the moving body 2 or fixed on the moving body 2. For example, as Figure 3 shown, when the induction sheet 3 is sleeved on the moving body 2, the induction sheet 3 includes a sleeve ring portion 31 and an induction portion 32. In order to enable the induction sheet 3 to be sleeved on the moving body 2 more firmly, an external thread 211 can be provided on the moving body 2, and correspondingly, an internal thread 311 is provided on the sleeve ring portion. The induction sheet and the moving body are fixed by threads. The fixed body 1 and the moving body 2 can be set to a circular structure, a square structure or other shapes, which can be set according to needs in the present utility model, and the present utility model does not limit the shape. Preferably, the fixed body 1 is a fixed sleeve, and the moving body 2 is a floating catheter.

[0026] As Figure 3 shown, the floating catheter (moving body 2) includes a first floating catheter body 21 and a second floating catheter body 22. The diameter of the first floating catheter body 21 is smaller than that of the second floating catheter body 22. An induction sheet is provided on the first floating catheter body 21 and near the second floating catheter body 22. One end of the second floating catheter body 22 away from the first floating catheter body 22 is connected to a pneumatic quick connector 4 to facilitate the entry and exit of the consumable 5 from the buffer device;

[0027] As Figure 4As shown, a second through hole 11 for the passage of the second floating catheter body 22, a third through hole 12 for the passage of the first floating catheter body 21, and a first through hole 13 only for the passage of the consumable 5 are provided inside the fixed sleeve (fixed body 1). The first through hole 13 is provided at one end of the fixed sleeve (fixed body 1), and a pneumatic quick connector 4 is connected at the first through hole 13. The diameter of the fixed sleeve at the third through hole 13 is greater than or equal to the diameter of the collar portion of the sensing piece 3, which is used to control the movement range of the floating catheter (moving body 2) inside the fixed sleeve (fixed body 1).

[0028] In some preferred embodiments, a first elastic member 6 is connected to one side of the sensing piece 3, and a second elastic member 7 is connected to the other side. The sensing piece 3 returns to its initial position under the action of the first elastic member 6 and / or the second elastic member 7. Preferably, one end of the first elastic member 6 is connected to one side of the sensing piece 3, and the other end of the first elastic member 6 is connected to the fixed body 1; one end of the second elastic member 7 is connected to the other side of the sensing piece 3, and the other end of the second elastic member 7 is connected to the moving body 2. After the moving body 2 moves, the moving body (sensing piece) is restored to its initial position under the elastic force of the first elastic member 6 and / or the second elastic member 7.

[0029] In some preferred embodiments, a circuit board 8 is further included. A sensor 9 is provided on the circuit board 8, and the sensor 9 is configured to adjust the working speed of the feeding motor for extruding the consumable when it senses the sensing piece 3. The sensor 9 may only include a first sensor 91, and the first sensor 91 can be arranged anywhere at a non-initial position of the sensing piece. When the sensing piece 3 senses the first sensor, the rotation speed of the feeding motor is adjusted to make the moving body drive the sensing piece to move in the opposite direction.

[0030] The sensor 9 may also include a first sensor 91 and a second sensor 92; the first sensor 91 and the second sensor 92 are respectively located on both sides of the initial position of the sensing piece. When the moving body 2 moves forward (the left direction in the drawing) relative to the original position, the sensing piece 3 senses the first sensor 91, and the first sensor 91 adjusts the feeding speed of the front feeding motor; when the moving body 2 moves backward (the right direction in the drawing) relative to the original position, the sensing piece 3 senses the second sensor 92, and the second sensor 92 adjusts the feeding speed of the rear feeding motor;

[0031] The sensor 9 includes a third sensor, and the third sensor is used to sense whether the sensing piece is in the initial position.

[0032] Among them, the first sensor, the second sensor, and the third sensor are only for distinguishing sensors at different positions and do not have other meanings. The sensor 9 is a groove type photoelectric switch.

[0033] A power supply port 81 is also provided on the circuit board 8 for providing a power supply function to the circuit board 8. Preferably, the buffer device further includes a housing (fixed seat) 100, the fixed body 1 is fixed on the housing (fixed seat) 100, and a connecting portion 101 is further provided on the housing (fixed seat) 100. The connecting portion 101 can be a part of the fixed body for fixedly connecting the fixed body 1, or can be separately provided for fixing the circuit board 8. A placement groove 102 is provided on the connecting portion 101, and the circuit board 8 is placed in the placement groove 102.

[0034] During the 3D printing process, two or more motors need to work synchronously so that the consumable material can smoothly pass through the Teflon tube and enter the hot end of the 3D printer for printing. The buffer device is arranged between two feeding motors. When the feeding speed of the feeding motor at the front end of the buffer device is greater than the feeding speed of the feeding motor at the rear end, as Figure 6 shown, due to the speed difference, the moving body 2 moves backward (the right side direction in the drawing) relative to the original position. The induction sheet 3 provided on the moving body 2 senses with the second sensor 92, and the second sensor 92 adjusts the feeding speed of the feeding motor at the rear end so that the feeding speed of the feeding motor at the front end of the buffer device is the same as that of the feeding motor at the rear end; when the feeding speed of the feeding motor at the front end of the buffer device is less than the feeding speed of the feeding motor at the rear end, as Figure 7 shown, due to the speed difference, the moving body 2 moves forward (the left side direction in the drawing) relative to the original position. The induction sheet 3 provided on the moving body 2 senses with the first sensor 91, and the first sensor 91 adjusts the feeding speed of the feeding motor at the front end so that the feeding speed of the feeding motor at the front end of the buffer device is the same as that of the feeding motor at the rear end; as Figure 1 shown, when the feeding speed of the feeding motor at the front end of the buffer device is equal to the feeding speed of the feeding motor at the rear end, the induction sheet 3 does not move. When the third sensor 93 cannot sense the induction sheet 3, it can be determined that the feeding speed of the feeding motor at the front end of the buffer device has changed from that of the feeding motor at the rear end. Then, according to whether the induction sheet 3 senses with the first sensor 91 or the second sensor 92, the feeding motor or the speed of the feeding motor is adjusted accordingly. No matter which direction the moving body 2 moves, the induction sheet 3 located on the moving body 2 will trigger the sensor 9 located on the circuit board 8, and the feeding motors before and after the buffer device work synchronously through negative feedback regulation, realizing precise synchronous feeding so that the consumable material can smoothly pass through the Teflon tube and enter the hot end of the printer for printing, avoiding the situation that the consumable material is easily squeezed and stretched during 3D printing.

[0035] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0036] It should be noted that the technical features not described in detail in the present utility model can all be realized by any prior art.

Claims

1. A buffer device for synchronous feeding of 3D printing, characterized in that: It comprises a fixed body and a movable body, wherein the movable body is provided with a channel for consumables to pass through, and the movable body is configured to be movable within the fixed body; a sensing sheet is provided on the movable body, and the sensing sheet is configured to move with the movable body; one side of the sensing sheet is connected to a first elastic member, and the other side is connected to a second elastic member, and the sensing sheet returns to its initial position under the action of the first elastic member and / or the second elastic member.

2. A buffer device for synchronous feeding of 3D printing according to claim 1, characterized in that: It also includes a circuit board, on which a sensor is provided. The sensor is configured to adjust the working speed of a feeding motor for extruding consumables after induction with the induction sheet.

3. A buffer device for synchronous feeding of 3D printing according to claim 2, characterized in that: The sensors include a first sensor.

4. A buffer device for synchronous feeding of 3D printing according to claim 3, characterized in that: The sensor includes a second sensor.

5. A buffer device for synchronous feeding of 3D printing according to claim 4, characterized in that: The initial position of the sensing sheet is located at a position other than the first sensor or between the first sensor and the second sensor.

6. The buffer device for synchronous feeding of 3D printing according to claim 1, characterized in that: One end of the moving body is connected with a pneumatic quick connector.

7. The buffer device for synchronous feeding of 3D printing according to claim 1, characterized in that: One end of the fixed body is provided with a first through hole only for consumables to pass through, and the first through hole is connected to a pneumatic quick connector.

8. A 3D printer, characterized in that: The invention comprises the buffer device described in any one of claims 1 to 7.

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