A side peeling mechanism for a 3D printer

Abstract

The present invention provides a side peeling mechanism for a 3D printer, which reduces peeling force, increases peeling speed, and increases the maximum molding area of ​​a single layer. The technical solution of the side peeling mechanism for a 3D printer of the present invention comprises: a driving unit, which is installed on one side of a material tray and is linked with the material tray; a pressing and resetting unit, which is located within the movement track of the material tray. During the movement of the material tray, the pressing and resetting unit is in a stressed state and has a tendency to return to an initial position.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printers, and in particular to a side peeling mechanism of a 3D printer. Background Art

[0002] The bottom projection 3D printer has a process of separating the bottom of the printed part from the release film. The existing technology mostly uses a direct pulling and peeling method to separate the molded product from the release film. As shown in Figure 1, a printing platform 2 is arranged on the upper part of the material tray of the 3D printer, and a release film 1 is attached to the material tray. The bottom plate of the printing platform 2 is used to bond the top of the printed product 3. The printing platform 2 is also connected to the lifting mechanism 5. When printing, the upper part of the product is printed first, and then printed downward layer by layer. After each layer of printing is completed, the lifting mechanism 5 will move upward, moving upward with the printed product 3, separating from the release film 1, and the peeling force is sensed by the peeling force sensor 4.

[0003] The current direct pull-off method is equivalent to peeling the entire bottom of the printed product at once. When the bottom area of ​​the printed product is large, the peeling force will increase greatly, resulting in peeling failure. In severe cases, the release film will tear and damage the 3D printer body. At the same time, due to the large peeling force, the maximum molding area of ​​a single layer of the product is also limited. Summary of the invention

[0004] The invention provides a side peeling mechanism for a 3D printer, which reduces peeling force, increases peeling speed, and increases the maximum molding area of ​​a single layer.

[0005] The technical solution of a side peeling mechanism of a 3D printer of the present invention comprises:

[0006] A driving unit, the driving unit is mounted on one side of the material tray and is linked to the material tray;

[0007] A pressing and resetting unit is located within the movement trajectory of the material tray. During the movement of the material tray, the pressing and resetting unit is in a stressed state and has a tendency to return to an initial position.

[0008] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0009] The pressing and resetting unit comprises a mounting plate and a plurality of protruding parts movably arranged on the mounting plate. During the movement of the material tray, the protruding parts are in a stressed state and have a tendency to return to an initial position.

[0010] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0011] The pressing and resetting unit further comprises a guide post, and the protruding piece is mounted on the guide post and reciprocates along the guide post.

[0012] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0013] A spring is arranged between the protruding piece and the mounting plate.

[0014] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0015] The plurality of protruding members are arranged at equal intervals.

[0016] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0017] The side of the protruding piece close to the material tray is arc-shaped, and the arc is arched toward the direction close to the material tray.

[0018] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0019] The driving unit is a motor or a cylinder.

[0020] The present invention adds a side peeling mechanism to the 3D printer. Before each movement of the lifting mechanism, under the action of the driving unit (which provides a power source for the side peeling mechanism), one side of the material tray is tilted, so that the release film of the material tray forms an angle with the bottom of the printed product and the edge is tilted. Then the lifting mechanism moves upward to complete the peeling step. In the side peeling method adopted by the present invention, since the material tray is tilted under the action of the driving unit, the peeling surface and the peeling force are not in the same direction. During side peeling, one side is peeled first and then the whole surface is tilted. Therefore, the maximum pulling force value will be reduced, thereby reducing the average pulling force of the entire peeling. Furthermore, the pressing and resetting unit is located within the motion trajectory of the material tray, and the material tray can be automatically pressed and reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 (a) (b) is a structural diagram of a 3D printer in the prior art;

[0023] FIG. 2(a)(b) is a structural diagram and a side view of a side peeling mechanism of a 3D printer of the present invention;

[0024] Figure 3 It is a structural diagram of the compression and resetting unit in FIG2 ;

[0025] Figure 4 is a structural diagram of the drive unit in FIG2 ;

[0026] Figure 5 It is a schematic diagram of the stress state. DETAILED DESCRIPTION

[0027] The invention provides a side peeling mechanism for a 3D printer, which reduces peeling force, increases peeling speed, and increases the maximum molding area of ​​a single layer.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Please refer to Figure 2(a)(b) and Figure 3 and Figure 4 The technical solution of a 3D printer side peeling mechanism 6 of the present invention includes:

[0030] The drive unit 8 is installed on one side of the material tray and is linked with the material tray. It can be understood that the drive unit 8 provides power for the movement of the material tray when it is in working state. The installation position of the drive unit 8 is not limited to the right side of the material tray as shown in the figure.

[0031] The driving unit 8 is a motor or a cylinder. In this embodiment, the driving unit 8 is a linear stepping motor.

[0032] The pressing and resetting unit 7 is located within the movement track of the material tray. During the movement of the material tray, the pressing and resetting unit 7 is in a stressed state and has a tendency to return to the initial position. It can be understood that during the movement of one end of the material tray, the material tray tilts downward relative to the printing platform, and the pressing and resetting unit 7 is located below the material tray. The tendency of the pressing and resetting unit 7 to return to the initial state can automatically press and reset the material tray.

[0033] Preferably, in the technical solution of the side peeling mechanism of the 3D printer,

[0034] The pressing and resetting unit 7 includes a mounting plate 71 and a plurality of protruding members 73 movably disposed on the mounting plate 71 . The plurality of protruding members 73 are not limited to being disposed at equal intervals as shown in the figure.

[0035] During the movement of the tray, the protruding member 73 is in a stressed state and has a tendency to return to an initial position. The side of the protruding member 73 close to the tray is arc-shaped, and the arc is arched toward the direction close to the tray.

[0036] like Figure 3 As shown, the clamping and resetting unit 7 also includes a guide column, and the protruding member 73 is installed on the guide column and slides back and forth along the guide column. During the reciprocating sliding of the protruding member, since a spring is provided between the protruding member and the mounting plate, the spring has a tendency to return to its initial state under stress.

[0037] The present invention adds a side peeling mechanism to the 3D printer. Before each movement of the lifting mechanism, under the action of the driving unit 8 (which provides a power source for the side peeling mechanism), one side of the material tray is tilted, so that the release film of the material tray forms an angle with the bottom of the printed product and the edge is tilted. Then the lifting mechanism moves upward to complete the peeling step.

[0038] like Figure 5 As shown, the side peeling method adopted by the present invention, since the material tray is tilted under the action of the driving unit 8, the peeling surface and the peeling force are not in the same direction. When peeling sideways, one side is peeled off first and then the whole surface is peeled off. Therefore, the maximum pulling force value will be reduced, thereby reducing the average pulling force of the entire peeling.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A 3D printer side peeling mechanism, characterized in that: include: A driving unit, the driving unit is installed on one side of the material tray and is linked with the material tray; A pressing and resetting unit, wherein the pressing and resetting unit is located within the movement track of the tray, and during the movement of the tray, the pressing and resetting unit is in a stressed state and has a tendency to return to an initial position; The pressing and resetting unit comprises a mounting plate and a plurality of protruding pieces movably arranged on the mounting plate. During the movement of the material tray, the protruding pieces are in a stressed state and have a tendency to return to an initial position. The side of the protruding pieces close to the material tray is arc-shaped, and the arc is arched in a direction close to the material tray. The clamping and resetting unit also includes a guide column, the protruding piece is installed on the guide column and reciprocates along the guide column, a spring is arranged between the protruding piece and the mounting plate, a plurality of the protruding pieces are arranged at equal intervals, and the driving unit is a cylinder.

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