Continuous fiber reinforced resin matrix composite 3D printer nozzle

Abstract

The utility model relates to the technical field of 3D printing, and particularly discloses a continuous fiber reinforced resin matrix composite 3D printer nozzle which comprises a nozzle body and a spraying piece, a feeding channel penetrating through the nozzle body is formed in the nozzle body, one end of the spraying piece is connected to the nozzle body, and the other end of the spraying piece is connected to the nozzle body. A material spraying channel penetrating through the spraying piece is formed in the spraying piece, the material spraying channel is communicated with the feeding channel, a discharging opening communicated with the material spraying channel is formed in the end face of the other end of the spraying piece, and the discharging opening is provided with a fillet structure in the circumferential direction. Through the arrangement, the discharge port is transited through the fillet, so that the contact area between the caliber of the discharge port and the extruded material is further increased, the scraping of the discharge port to the extruded material is reduced, the shearing of the discharge port to the extruded material is effectively reduced, and the discharge port is prevented from breaking the extruded material.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a continuous fiber reinforced resin-based composite material 3D printer nozzle. Background Art

[0002] Continuous fiber reinforced resin-based composite materials have important application value and development potential in the fields of aerospace, automobiles, and civilian consumption. Continuous fiber reinforced resin-based composite materials have a series of advantages such as light weight, high specific strength, high specific modulus, easy processing and molding, excellent elasticity, chemical corrosion resistance and good weather resistance. They have become one of the most important structural materials in aerospace, military and other high-tech fields, but their traditional processing and forming process is relatively complicated. 3D printing technology has significant advantages in the forming of complex-shaped components, and continuous fiber reinforced resin-based composite materials have excellent mechanical properties, which can make up for the shortcomings of poor quality and precision of traditional 3D printing materials.

[0003] During the printing process of existing continuous fiber reinforced resin-based composite 3D printers, the nozzle mouth will produce varying degrees of friction and wear between the continuous fibers and may even cut the continuous fibers, seriously affecting the mechanical properties and surface quality of the printed components. Utility Model Content

[0004] The purpose of the utility model is to provide a continuous fiber reinforced resin-based composite material 3D printer nozzle, which can reduce the wear and shearing of the continuous fiber by the continuous fiber reinforced resin-based composite material 3D printer nozzle and improve the mechanical properties and surface quality of the printed components.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a continuous fiber reinforced resin-based composite material 3D printer nozzle, comprising:

[0007] A nozzle body, wherein a feeding channel penetrating the nozzle body is provided in the nozzle body;

[0008] A spraying member, one end of which is connected to the nozzle body, a spraying channel penetrating the spraying member is provided in the spraying member, the spraying channel is connected to the feeding channel, and a discharge port connected to the spraying channel is provided on the end face of the other end of the spraying member, and the discharge port is provided with a rounded structure along the circumferential direction.

[0009] As an optimal technical solution for the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the diameter of the discharge port is d, the inner diameter of the feeding channel is D1, and d and D1 satisfy: 1.2d≤D1≤1.5d; or, 2d≤D1≤2.5d.

[0010] As a preferred technical solution of the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the end face diameter of the other end of the ejection member is D2, and d and D2 satisfy: 1.5d≤D2≤2d; or, 2d≤D2≤2.5d.

[0011] As a preferred technical solution for the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the radius of the fillet structure is R, and R and d satisfy: 0.2d≤R≤0.4d.

[0012] As an optimal technical solution for the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the nozzle body includes a mounting portion and a connecting portion arranged in sequence along the extension direction of the feeding channel, the connecting portion is connected to the ejection part, and the mounting portion is used for detachable connection with the heating block.

[0013] As a preferred technical solution of the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, a mounting hole matching with the mounting portion is opened in the heating block, and the mounting portion is threadedly connected to the mounting hole.

[0014] As a preferred technical solution of the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the inner diameter of the spray channel gradually decreases from an end close to the nozzle body to an end away from the nozzle body.

[0015] As a preferred technical solution for the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the nozzle body is made of copper metal.

[0016] As a preferred technical solution of the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the nozzle body and the ejection member are integrally formed.

[0017] As an optimal technical solution for the above-mentioned continuous fiber reinforced resin-based composite material 3D printer nozzle, the spray channel includes a nozzle cavity and a cylindrical cavity, the nozzle cavity is in an inverted frustum shape, the nozzle cavity is connected between the cylindrical cavity and the feeding channel, and the discharge port is connected to the cylindrical cavity.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a continuous fiber reinforced resin-based composite material 3D printer nozzle, the continuous fiber reinforced resin-based composite material 3D printer nozzle comprises: a nozzle body and a spraying member, a feed channel penetrating the nozzle body is provided in the nozzle body, one end of the spraying member is connected to the nozzle body, a spraying channel penetrating the spraying member is provided in the spraying member, the spraying channel is connected to the feed channel, and a discharge port connected to the spraying channel is provided on the end face of the other end of the spraying member, and the discharge port is provided with a rounded structure along the circumferential direction. In this way, a rounded transition is made at the discharge port to further increase the contact area between the caliber of the discharge port and the extruded material, reduce the scraping of the extruded material by the discharge port, and effectively reduce the shearing of the extruded material by the discharge port, thereby avoiding the breakage of the extruded material by the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a continuous fiber reinforced resin-based composite material 3D printer nozzle provided by the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the nozzle and heating block of the continuous fiber reinforced resin-based composite material 3D printer provided by the utility model;

[0022] Figure 3 This is a cross-sectional view of the nozzle and heating block of the continuous fiber reinforced resin-based composite material 3D printer provided by the utility model.

[0023] in:

[0024] 1. Nozzle body; 101. Feeding channel; 102. Mounting part; 103. Connecting part;

[0025] 2. Spraying member; 201. Spraying channel; 2011. Nozzle cavity; 2012. Column cavity;

[0026] 3. Discharge port; 4. Heating block. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0029] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0032] like Figures 1 to 3As shown, this embodiment provides a continuous fiber reinforced resin-based composite material 3D printer nozzle, which comprises: a nozzle body 1 and a spraying member 2, wherein a feed channel 101 penetrating the nozzle body 1 is provided in the nozzle body 1, one end of the spraying member 2 is connected to the nozzle body 1, a spraying channel 201 penetrating the spraying member 2 is provided in the spraying member 2, the spraying channel 201 is connected to the feed channel 101, and a discharge port 3 connected to the spraying channel 201 is provided on the end surface of the other end of the spraying member 2, and the discharge port 3 is provided with a rounded structure along the circumferential direction. In this way, a rounded transition is made at the discharge port 3 to further increase the contact area between the caliber of the discharge port 3 and the extruded material, reduce the scraping of the extruded material by the discharge port 3, and effectively reduce the shearing of the extruded material by the discharge port 3, thereby avoiding the breakage of the extruded material by the discharge port 3.

[0033] It should be noted that the feeding channel 101 is used to feed the pre-impregnated filaments or the resin matrix and the continuous fibers to the spraying channel 201. Of course, in other embodiments, different types of materials can be fed according to the actual needs of the 3D printing process, and no further limitation is made here.

[0034] In this embodiment, the continuous fiber reinforced resin-based composite material 3D printer nozzle mainly optimizes the structural parameters of the spray channel 201, the discharge port 3 and the end surface of the spray member 2 to meet the requirements of continuous fiber composite 3D printing.

[0035] Specifically, the following scheme is exemplified in this embodiment: the diameter of the discharge port 3 is d, the inner diameter of the feed channel 101 is D1, and d and D1 satisfy: 1.2d≤D1≤1.5d; or, 2d≤D1≤2.5d. Further, for printing pre-impregnated filaments, d and D1 satisfy: 1.2d≤D1≤1.5d to ensure that the pre-impregnated fibers are effectively heated during the extrusion process; for the in-situ impregnation printing process, d and D1 satisfy: 2d≤D1≤2.5d to ensure that the molten resin matrix effectively impregnates the continuous fiber bundle.

[0036] Optionally, the end face diameter of the other end of the ejection member 2 is D2, and d and D2 satisfy: 1.5d≤D2≤2d; or, 2d≤D2≤2.5d. In this way, the end face size of the ejection member 2 structure can be further increased to appropriately increase the extrusion force of the end of the ejection member 2 on the printed component, improve the surface quality of the printed component, and at the same time, perform secondary heating on the adjacent printed parts to improve the collective bonding performance between adjacent lines, that is, to ensure that the printed surface is properly ironed during the printing process.

[0037] Specifically, for flat-plate structures where the printing trajectory is mainly straight, d and D2 satisfy: 1.5d≤D2≤2d; for honeycombs, curves, and other structures that require continuous change of the printing trajectory direction, d and D2 satisfy: 2d≤D2≤2.5d to ensure that the printed components have good surface quality.

[0038] Optionally, the radius of the rounded structure is R, and R and d satisfy: 0.2d≤R≤0.4d. This arrangement can prevent the continuous fiber from being cut at the discharge port 3 under the combined effect of fiber drag and extrusion force during the printing process.

[0039] Optionally, in order to facilitate the installation and removal of the nozzle body 1 during the printing process, the nozzle body 1 includes a mounting portion 102 and a connecting portion 103 arranged in sequence along the extension direction of the feeding channel 101, the connecting portion 103 is connected to the ejection member 2, and the mounting portion 102 is used for detachable connection with the heating block 4. Further, a mounting hole matching with the mounting portion 102 is opened in the heating block 4, the mounting portion 102 is threadedly connected to the mounting hole, and a sealing gasket is provided between the heating block 4 and the mounting portion 102.

[0040] Optionally, the inner diameter of the spray channel 201 gradually decreases from the end close to the nozzle body 1 to the end away from the nozzle body 1. In this way, by changing the inner diameter of the spray channel 201, a certain pressure difference can be formed when the extruded material passes through the spray channel 201, thereby improving the printing effect.

[0041] Optionally, the nozzle body 1 and the ejection member 2 are both made of copper metal. Of course, in other embodiments, if the printed resin matrix is ​​a high temperature resistant material, the nozzle body 1 needs to be made of other metal materials.

[0042] Optionally, the nozzle body 1 and the ejection member 2 are integrally formed.

[0043] Optionally, the spray channel 201 includes a nozzle cavity 2011 and a cylindrical cavity 2012 , the nozzle cavity 2011 is in an inverted frustum shape, the nozzle cavity 2011 is connected between the cylindrical cavity 2012 and the feeding channel 101 , and the discharge port 3 is connected to the cylindrical cavity 2012 .

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A continuous fiber reinforced resin-based composite material 3D printer nozzle, characterized in that: include: A nozzle body (1), wherein a feeding channel (101) penetrating the nozzle body (1) is provided in the nozzle body (1); A spraying member (2), one end of the spraying member (2) is connected to the nozzle body (1), a spraying channel (201) penetrating the spraying member (2) is provided in the spraying member (2), the spraying channel (201) is connected to the feeding channel (101), and an end surface of the other end of the spraying member (2) is provided with a discharge port (3) connected to the spraying channel (201), and the discharge port (3) is provided with a rounded structure along the circumferential direction.

2. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to claim 1, characterized in that: The diameter of the discharge port (3) is d, the inner diameter of the feeding channel (101) is D1, and d and D1 satisfy: 1.2d≤D1≤1.5d; or, 2d≤D1≤2.5d.

3. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to claim 2, characterized in that: The end face diameter of the other end of the ejection member (2) is D2, and d and D2 satisfy: 1.5d≤D2≤2d; or, 2d≤D2≤2.5d.

4. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to claim 2, characterized in that: The radius of the rounded structure is R, and R and d satisfy: 0.2d≤R≤0.4d.

5. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to any one of claims 1 to 4, characterized in that: The nozzle body (1) comprises a mounting portion (102) and a connecting portion (103) arranged in sequence along the extending direction of the feeding channel (101); the connecting portion (103) is connected to the ejection member (2); and the mounting portion (102) is used for detachably connecting to a heating block (4).

6. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to claim 5, characterized in that: A mounting hole cooperating with the mounting portion (102) is provided in the heating block (4), and the mounting portion (102) is threadedly connected to the mounting hole.

7. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to any one of claims 1 to 4, characterized in that: The inner diameter of the injection channel (201) gradually decreases from an end close to the nozzle body (1) to an end away from the nozzle body (1).

8. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to any one of claims 1 to 4, characterized in that: The nozzle body (1) is made of copper metal.

9. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to any one of claims 1 to 4, characterized in that: The nozzle body (1) and the ejection member (2) are integrally formed.

10. The continuous fiber reinforced resin-based composite material 3D printer nozzle according to any one of claims 1 to 4, characterized in that: The spray channel (201) comprises a nozzle cavity (2011) and a columnar cavity (2012); the nozzle cavity (2011) is in the shape of an inverted truncated cone; the nozzle cavity (2011) is connected between the columnar cavity (2012) and the feeding channel (101); and the discharge port (3) is connected to the columnar cavity (2012).

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