Multifunctional spray head structure for additive manufacturing

Abstract

The invention discloses a multifunctional spray head structure for additive manufacturing, which comprises a mounting seat, a spray head main body, a first lifting driving mechanism, a second lifting driving mechanism and a needle plate, and the first lifting driving mechanism and the second lifting driving mechanism are arranged on the mounting seat at an interval left and right; a first mounting plate located below the mounting base is arranged at the bottom of the first lifting driving mechanism, the spray head body is vertically arranged at the bottom of the first mounting plate, a second mounting plate located below the mounting base is arranged at the bottom of the second lifting driving mechanism, and the needle plate is arranged at the bottom of the second mounting plate. By means of the mode, according to the multifunctional spray head structure for additive manufacturing, the stability of an upper layer material on a lower layer material is improved, and the horizontal shear resisting effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a multifunctional nozzle structure for additive manufacturing. Background Art

[0002] Additive manufacturing is a technology that manufactures entities based on the entity's three-dimensional CAD data by adding materials layer by layer. It is widely used in industrial parts and construction fields.

[0003] In the process of additive manufacturing, it is necessary to ensure the adhesion between the upper and lower materials. If the entity to be additively manufactured is small in size, the nozzle stroke is short during the construction of a single layer of material, and the interval between the ejection time of the upper and lower materials is short, the adhesion between the upper and lower materials can usually be ensured. However, due to the short interval, the lower material is not completely solidified and has poor support for the upper material. At this time, the upper material is accumulated on the lower material, and the edge of the upper material is prone to collapse due to fluidity problems.

[0004] In addition, if the entity that requires additive manufacturing is large in size, such as 3D printing of building walls, the nozzle has a long stroke when constructing a single layer of material, and the interval between the spraying time of the upper layer material and the lower layer material is long. Local solidification occurs on the surface of the lower layer material, and the material rolling resistance during the accumulation of the upper layer material on the surface of the lower layer material is small, which can easily lead to deformation problems and affect the bonding effect between the upper and lower layers, which needs to be improved. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a multifunctional nozzle structure for additive manufacturing, so as to perform additive manufacturing and ensure the bonding effect between the upper material and the lower material.

[0006] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a multifunctional nozzle structure for additive manufacturing, including: a mounting seat, a nozzle body, a first lifting drive mechanism, a second lifting drive mechanism and a needle plate, the first lifting drive mechanism and the second lifting drive mechanism are arranged on the mounting seat at intervals on the left and right, a first mounting plate located below the mounting seat is arranged at the bottom of the first lifting drive mechanism, the nozzle body is vertically arranged at the bottom of the first mounting plate, a second mounting plate located below the mounting seat is arranged at the bottom of the second lifting drive mechanism, and the needle plate is arranged at the bottom of the second mounting plate.

[0007] In a preferred embodiment of the present invention, the first lifting drive mechanism adopts a cylinder, a hydraulic cylinder or an electric push rod.

[0008] In a preferred embodiment of the present invention, the second lifting drive mechanism adopts a cylinder, a hydraulic cylinder or an electric push rod.

[0009] In a preferred embodiment of the present invention, a feed pipe joint is provided on one side of the nozzle body.

[0010] In a preferred embodiment of the present invention, the bottom array of the needle plate is provided with ejector pins.

[0011] In a preferred embodiment of the present invention, the ejector pin has a cone structure pointing downward.

[0012] In a preferred embodiment of the present invention, a column extending upward is disposed on the top of the mounting seat, a connecting plate is disposed on the top of the column, and screw mounting holes are disposed on the connecting plate.

[0013] In a preferred embodiment of the present invention, the first lifting drive mechanism and the second lifting drive mechanism are located on both sides of the column.

[0014] The beneficial effects of the present invention are as follows: a multifunctional nozzle structure for additive manufacturing pointed out by the present invention drives the movement of the nozzle body and the needle plate through the mounting seat, and uses the second lifting drive mechanism to intermittently lower the needle plate to form multiple positioning grooves on the lower material. When the nozzle body subsequently moves above the positioning groove, the material is accumulated on the lower material to form an upper material and fill the positioning groove, which greatly improves the stability of the upper material on the lower material, is beneficial to the bonding of the upper material and the lower material, has higher connection strength after curing, and has good resistance to horizontal shear, and is suitable for additive manufacturing of building walls or other large objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 It is a structural schematic diagram of a preferred embodiment of a multifunctional nozzle structure for additive manufacturing of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure of the needle plate rising process. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0017] See also Figure 1~Figure 2, the embodiment of the present invention includes: like Figure 1 The multifunctional nozzle structure for additive manufacturing shown includes: a mounting seat 3, a nozzle body 6, a first lifting drive mechanism 1, a second lifting drive mechanism 2 and a needle plate 8. A column 4 extending upward is arranged on the top of the mounting seat 3, and a connecting plate 5 is arranged on the top of the column 4. The two ends of the column 4 are respectively welded and fixed to the mounting seat 3 and the connecting plate 5, and the structure is firm. The connecting plate 5 is provided with screw mounting holes 10 for easy installation on a manipulator. During the additive manufacturing process, the connecting plate 5 and the mounting seat 3 are moved by the manipulator.

[0018] The first lifting drive mechanism 1 and the second lifting drive mechanism 2 are arranged on the mounting seat 3 at intervals on the left and right. In this embodiment, the first lifting drive mechanism 1 and the second lifting drive mechanism 2 are located on both sides of the column 4, which is conducive to balancing the weight on both sides of the column 4 on the mounting seat 3 and is not easy to deflect.

[0019] like Figure 2 As shown, a first mounting plate 11 located below the mounting seat 3 is disposed at the bottom of the first lifting drive mechanism 1, and the nozzle body 6 is vertically disposed at the bottom of the first mounting plate 11. The nozzle body 6 is driven to rise and fall by the first lifting drive mechanism 1, and the position height of the nozzle body 6 is slightly changed. In this embodiment, the first lifting drive mechanism 1 adopts a cylinder, a hydraulic cylinder or an electric push rod, and can be telescopically controlled by an industrial computer, with high flexibility.

[0020] like Figure 1 As shown, a feed pipe joint 7 is provided on one side of the nozzle body 6, and the feed pipe joint 7 is externally connected to a material supply pipeline to feed the material into the nozzle body 6, and then the nozzle body 6 is used to spray the material downward, so as to realize the layer-by-layer accumulation of the material and perform additive manufacturing of the physical object.

[0021] A second mounting plate 12 located below the mounting seat is provided at the bottom of the second lifting drive mechanism 2, and the needle plate 8 is provided at the bottom of the second mounting plate 12. The needle plate 8 is fixed by screws, and the structure is firm. In this embodiment, the second lifting drive mechanism 2 adopts a cylinder, a hydraulic cylinder or an electric push rod, and the selection is flexible, so that the needle plate 8 can be lifted and lowered with the extension and retraction of the second lifting drive mechanism 2. The extension and retraction of the second lifting drive mechanism 2 can be controlled by an industrial computer, thereby improving the automation level.

[0022] like Figure 2 As shown, ejector pins 9 are arranged in an array at the bottom of the needle plate 8, and the ejector pins 9 can be welded and fixed at the bottom of the needle plate 8 to prevent them from falling off. In this embodiment, the ejector pins 9 adopt a cone structure pointing downward, and the needle plate 8 drives the ejector pins 9 to move downward, so that a plurality of positioning grooves 13 can be formed on the lower layer material 14.

[0023] The movement of the mounting base 3 is driven by the manipulator, thereby driving the movement of the nozzle body 6 and the needle plate 8, and the second lifting drive mechanism 2 is used to intermittently lower the needle plate 8 to form a plurality of positioning grooves 13 on the lower layer material 14. When the nozzle body 6 subsequently moves above the positioning grooves 13, the material is accumulated on the lower layer material 14 to form an upper layer material 15 and fill the positioning grooves 13, thereby improving the stability of the upper layer material 15 on the lower layer material 14, facilitating the bonding of the upper layer material and the lower layer material, and achieving higher connection strength after curing, and better resistance to horizontal shearing.

[0024] In summary, the present invention points out a multifunctional nozzle structure for additive manufacturing. During the additive manufacturing process, a positioning groove can be formed on the lower material, thereby improving the bonding effect between the upper material and the lower material and increasing the functionality of the nozzle.

[0025] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multifunctional nozzle structure for additive manufacturing, characterized in that: include: A mounting seat, a nozzle body, a first lifting drive mechanism, a second lifting drive mechanism and a needle plate, wherein the first lifting drive mechanism and the second lifting drive mechanism are arranged on the mounting seat at intervals on the left and right, a first mounting plate located below the mounting seat is arranged at the bottom of the first lifting drive mechanism, the nozzle body is vertically arranged at the bottom of the first mounting plate, a second mounting plate located below the mounting seat is arranged at the bottom of the second lifting drive mechanism, and the needle plate is arranged at the bottom of the second mounting plate.

2. The multifunctional nozzle structure for additive manufacturing according to claim 1, characterized in that: The first lifting drive mechanism adopts a cylinder, a hydraulic cylinder or an electric push rod.

3. The multifunctional nozzle structure for additive manufacturing according to claim 1, characterized in that: The second lifting drive mechanism adopts a cylinder, a hydraulic cylinder or an electric push rod.

4. The multifunctional nozzle structure for additive manufacturing according to claim 1, characterized in that: A feed pipe joint is arranged on one side of the nozzle body.

5. The multifunctional nozzle structure for additive manufacturing according to claim 1, characterized in that: The bottom array of the needle plate is provided with ejector pins.

6. The multifunctional nozzle structure for additive manufacturing according to claim 5, characterized in that: The ejector pin adopts a cone structure pointing downward.

7. The multifunctional nozzle structure for additive manufacturing according to claim 1, characterized in that: A column extending upward is arranged on the top of the mounting seat, a connecting plate is arranged on the top of the column, and screw mounting holes are arranged on the connecting plate.

8. The multifunctional nozzle structure for additive manufacturing according to claim 7, characterized in that: The first lifting drive mechanism and the second lifting drive mechanism are located on both sides of the column.

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