3D printing wire rod production extrusion device
By improving the screw structure of the extruder and adopting a staggered design of dividing rings and main screw fins, multiple shearing and mixing of raw materials are achieved, solving the problem of insufficient mixing uniformity of 3D printing raw materials and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202422627980.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-10-30
AI Technical Summary
When existing 3D printing extrusion devices mix raw materials with specific requirements, especially 3D raw material bars with a starry sky effect, it is difficult to ensure the mixing uniformity of the raw materials, which affects product quality.
An improved extrusion device was designed, which adopted a screw structure including a feeding section, a compression section, a first uniform material section and a second uniform material section. Through the staggered arrangement of the main screw fins and the dividing rings, combined with the rotating drive and heating components, multiple shearing and mixing of the raw materials were achieved, thereby improving the mixing uniformity.
It effectively improves the mixing quality of 3D printing filaments, and improves product quality and production efficiency.
Smart Images
Figure CN223407425U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of 3D printing wire production equipment, and in particular to a 3D printing wire production extrusion device. Background Art
[0002] 3D printing is a widely used rapid prototyping technology. Its prototyping process involves first creating a three-dimensional computer model of the target part. Software then slices and layers that model, obtaining data for each processing layer. Under computer control, additive manufacturing is performed layer by layer based on this information, completing the target process. 3D printing's advantages lie in its unrestricted shape complexity, the lack of tooling, and its high speed and efficiency, enabling the automated manufacturing of free-form objects. Consequently, it is gaining increasing attention.
[0003] The basic materials for 3D printing are generally rod-shaped structures of several specific materials. By fusing a certain proportion of raw materials and masterbatches, they are extruded through an extruder to finally form a specific rod-shaped structure. Some 3D printing products with specific requirements require further adjustment of the raw materials. For example, 3D raw material rods with a starry sky effect require the addition of corresponding raw materials with reflective effects during extrusion, and at the same time, the uniformity of the raw material mixing during the extrusion process needs to be ensured. To this end, this application aims to improve the mixing uniformity of 3D printing extrusion wire production and further improve the extrusion device. Utility Model Content
[0004] The purpose of this application is to provide a 3D printing wire production extrusion device to solve at least one of the above technical problems.
[0005] In order to solve the above technical problems, the present application provides a 3D printing wire production extrusion device, comprising an outer shell, a material cavity is formed in the outer shell, a feed port connected to the material cavity is formed on the side wall of the outer shell near the first end, and an extrusion head is provided at the end away from the first end;
[0006] A rotary drive member, a heating assembly and an extrusion screw, wherein the rotary drive member is provided on the outer shell and a driving end thereof is provided through the outer shell and connected to the extrusion screw, and the extrusion screw is provided in the material cavity; the heating assembly is used to heat the molten material;
[0007] The extrusion screw has a feeding section, a compression section, a first material-distributing section, and a second material-distributing section in sequence along its axial direction; the extrusion screw includes a screw body and main screw fins arranged around the screw body; adjacent main screw fins form a main material groove;
[0008] A first ridge is formed on the bottom surface of the main trough of the first material-striking section, and the extending direction of the first ridge is parallel to the axial direction of the screw body;
[0009] The second material-leveling section is provided at the end of the screw body, and a material-leveling ring is formed around the outer wall of the second material-leveling section. The material-leveling ring is provided with a plurality of material-leveling rings and is evenly spaced along the axial direction of the screw body. The material-leveling ring is composed of a plurality of spaced-apart prismatic protrusions, one diagonal line of the prismatic protrusion is parallel to the axis of the screw body, and the other diagonal line is perpendicular to the axis of the screw body. The prismatic protrusions of adjacent material-leveling rings are staggered.
[0010] In the above implementation process, this solution has made further improvements to the screw in the extruder; the raw material enters the feed section through the feed port, and under the driving action of the rotating drive component, the raw material is melted under the action of the heating component and enters the compression section, the first material leveling section and the second material leveling section in sequence; in this solution, the material is transported forward through the main material trough between the main screw ribs, and when it enters the first material leveling section, the first rib will shear the advancing material, and the rotation of the screw can increase the shear force on the material, thereby improving the mixing effect; after the material passes through the first material leveling section, it further enters the second material leveling section. The second material-leveling section has multiple dividing rings formed on it for further shearing and mixing of the material. The material needs to pass through multiple dividing rings in sequence. The dividing rings are composed of multiple prismatic protrusions. It can be understood that the gaps between the multiple prismatic protrusions constitute the forward channel of the material. The prismatic protrusions on different layers of dividing rings are staggered. In this way, the material that has passed through the dividing ring of the upper layer enters the dividing ring of the next layer and is divided by a prismatic protrusion. This can effectively improve the mixing effect of the material, thereby improving the mixing quality of the subsequently extruded 3D printing filament and improving product quality.
[0011] Preferably, the included angle range of the first internal angle in the prismatic projection is 120°-135°; the first internal angle is the internal angle passed by a diagonal line parallel to the axis of the screw body;
[0012] During the above implementation process, this solution was tested and found that when the inner angle of the prismatic protrusion is within 120° to 135°, it can have a better effect of dividing and mixing the materials, and the discharge is also relatively smooth, ensuring sufficient basic efficiency.
[0013] Preferably, the outer wall of the screw body on the compression section is formed with secondary screw fins; the spiral direction of the secondary screw fins is parallel to the main screw fins;
[0014] A material distribution groove is formed on the auxiliary screw flight in a direction perpendicular to the screw body;
[0015] In the above implementation process, this solution adopts a double-screw design in the compression section, and further sets a dividing trough on the auxiliary screw rib. That is, during the extrusion process, part of the material can pass through the dividing trough. The use of this structural method can ensure sufficient shear plasticization while reducing the shear temperature and improving the mixing effect.
[0016] Preferably, the depth of the distribution trough is 1.5mm-2.5mm.
[0017] Preferably, the material cavity of the feeding section is tapered, and the inner diameter of the material cavity close to one end of the outer shell is larger than the inner diameter of the material cavity away from one end of the outer shell;
[0018] In the above implementation process, the material cavity of the feed section in this scheme adopts a conical design, which can increase the initial feed volume and improve the basic efficiency. At the same time, the conical forward transportation method can form a certain compression effect, thereby improving the compression tightness of the raw materials.
[0019] Preferably, the angle between the main screw flight and the axis of the screw body is in the range of 35°-45°.
[0020] During the above implementation process, this solution found that when the angle between the main screw fin and the axis of the screw body is in the range of 35°-45°, the forward extrusion transportation of the material is relatively smooth and the extrusion is smoother.
[0021] Preferably, a feeding funnel is provided at the feeding port;
[0022] In the above implementation process, the feed funnel can guide the material, thereby allowing the material to enter the material cavity through the feed port more smoothly.
[0023] Compared with the prior art, the beneficial effects of the present application are as follows: the present solution further improves the screw in the extruder; the raw material enters the feed section through the feed port, and under the driving action of the rotating drive member, the raw material is melted under the action of the heating component and sequentially enters the compression section, the first material leveling section and the second material leveling section; in the present solution, the material is transported forward through the main material trough between the main screw ribs, and when it enters the first material leveling section, the first rib will shear the advancing material, and the rotation of the screw can increase the shear force on the material, thereby improving the mixing effect; after the material passes through the first material leveling section, it is further The next step is to enter the second material-leveling section. The multiple dividing rings formed on the second material-leveling section can further shear and mix the material. The material needs to pass through multiple dividing rings in sequence. The dividing rings are composed of multiple prismatic protrusions. It can be understood that the gaps between the multiple prismatic protrusions constitute the forward channel of the material, and the prismatic protrusions on different layers of dividing rings are staggered. In this way, the material that has passed through the dividing ring of the upper layer enters the dividing ring of the next layer and is divided by a prismatic protrusion. This can effectively improve the mixing effect of the material, thereby improving the mixing quality of the subsequently extruded 3D printing filament and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present application;
[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of part A;
[0027] Figure 3 This is a schematic structural diagram of the second material leveling section in one embodiment of the present application;
[0028] Wherein: 10, outer shell; 11, feed port; 111, feed funnel; 12, extruder head; 13, rotary drive member; 20, screw body; 21, main screw fin; 22, secondary screw fin; 221, feed trough; 31, first ridge; 40, prismatic protrusion;
[0029] A1, feeding section; A2, compression section; A3, first mixing section; A4, second mixing section. DETAILED DESCRIPTION
[0030] The following diagrams illustrate various embodiments of the present application. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present application. In other words, in some embodiments of the present application, these practical details are not essential. Furthermore, to simplify the drawings, some conventional structures and components are depicted in a simplified schematic manner.
[0031] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.
[0032] In addition, in this application, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or ranking, nor are they used to limit this application. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0033] In order to further understand the content, features and effects of the utility model of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0034] Example
[0035] The basic materials for 3D printing are generally rod-shaped structures of several specific materials. By fusing a certain proportion of raw materials and masterbatches, the rod-shaped structures are finally formed through extrusion through an extruder. Some 3D printing products with specific requirements require further adjustment of the raw materials. For example, 3D raw material rods with a star-shaped effect require the addition of corresponding raw materials with a reflective effect during extrusion, while also ensuring the uniformity of the raw material mixing during the extrusion process. Therefore, this application aims to improve the mixing uniformity of 3D printing extrusion wire production and further improve the extrusion device. In order to solve the above technical problems, this embodiment provides the following technical solutions:
[0036] For details, see Figure 1-3 , this embodiment provides a 3D printing wire production extrusion device, including an outer shell 10, a rotary drive member 13, an extrusion screw and a heating assembly;
[0037] Specifically, a material cavity is formed in the outer shell 10, a material inlet 11 communicating with the material cavity is formed on the side wall of the outer shell 10 near the first end, and an extrusion head 12 is provided at the end away from the first end;
[0038] Specifically, the rotary drive member 13 is provided on the outer shell 10 and its driving end is passed through the outer shell 10 and connected to the extrusion screw, and the extrusion screw is provided in the material cavity; the heating component is used to heat the molten material;
[0039] For details, see Figure 1 The extrusion screw has a feed section A1, a compression section A2, a first material-distributing section and a second material-distributing section A4 in sequence along its axial direction; the extrusion screw includes a screw body 20 and main screw fins 21 arranged around the screw body 20; adjacent main screw fins 21 form a main material trough;
[0040] Furthermore, a first ridge 31 is formed on the bottom surface of the main trough of the first material-striking section A3, and the extending direction of the first ridge 31 is parallel to the axial direction of the screw body 20;
[0041] Specifically, the second material-leveling section A4 is provided at the end of the screw body 20. A material-leveling ring is formed around the outer wall of the second material-leveling section A4. The material-leveling rings are provided in plurality and are evenly spaced along the axial direction of the screw body 20. The material-leveling rings are composed of a plurality of spaced-apart prismatic protrusions 40. One diagonal line of the prismatic protrusions 40 is parallel to the axis of the screw body 20, and the other diagonal line is perpendicular to the axis of the screw body 20. The prismatic protrusions 40 of adjacent material-leveling rings are staggered.
[0042] In the above scheme, this scheme further improves the screw in the extruder; the raw material enters the feed section A1 through the feed port 11, and under the driving action of the rotating drive member 13, the raw material is melted under the action of the heating component and enters the compression section A2, the first material leveling section A3 and the second material leveling section A4 in sequence; in this scheme, the material is transported forward through the main material trough between the main screw ribs 21, and when it enters the first material leveling section A3, the first rib 31 will shear the advancing material, and the rotation of the screw can increase the shear force on the material, thereby improving the mixing effect; after the material passes through the first material leveling section A3, it is further transported to the second material leveling section A4. The material enters the second material-leveling section A4, and the multiple dividing rings formed on the second material-leveling section A4 can further shear and mix the material. The material needs to pass through multiple dividing rings in sequence. The dividing rings are composed of multiple prismatic protrusions 40. It can be understood that the gaps between the multiple prismatic protrusions 40 constitute the forward channel of the material, and the prismatic protrusions 40 on different layers of dividing rings are staggered. In this way, the material that has passed through the dividing ring of the upper layer enters the dividing ring of the next layer and will be divided by a prismatic protrusion 40. This can effectively improve the mixing effect of the material, thereby improving the mixing quality of the subsequently extruded 3D printing wire and improving product quality.
[0043] It should be noted that in the extrusion device, the extrusion head 12 and the heating component part of the structure belong to relatively conventional technology, so this application does not further elaborate on their specific structure and working principle; but it is understandable that it does not affect the technical personnel in this field to understand the overall solution.
[0044] Specifically, the included angle range of the first inner angle in the prismatic projection 40 is 120°-135°; the first inner angle is the inner angle passed by a diagonal line parallel to the axis of the screw body 20;
[0045] In the above scheme, it has been tested that when the inner angle of the prismatic protrusion 40 is within 120° to 135°, it can achieve a better material separation and mixing effect on the material, and the discharge is relatively smooth, ensuring sufficient basic efficiency.
[0046] For details, see Figure 1-2 The outer wall of the screw body 20 on the compression section A2 is formed with a secondary screw flight 22; the spiral direction of the secondary screw flight 22 is parallel to the main screw flight 21;
[0047] Furthermore, a material distribution groove 221 is formed on the auxiliary screw flight 22 in a direction perpendicular to the screw body 20;
[0048] In the above scheme, this scheme adopts a double-screw design on the compression section A2, and further provides a dividing trough 221 on the auxiliary screw 22, that is, during the extrusion process, part of the material can pass through the dividing trough 221. The use of this structural method can ensure sufficient shear plasticization while reducing the shear temperature and improving the mixing effect.
[0049] Furthermore, the depth of the trough is 1.5mm-2.5mm.
[0050] Specifically, the material cavity of the feeding section A1 is conical, and the inner diameter of the material cavity close to the outer shell 10 is larger than the inner diameter of the material cavity away from the outer shell 10;
[0051] In the above scheme, the material cavity of the feed section A1 in this scheme adopts a conical design, which can increase the initial feed amount and improve the basic efficiency. At the same time, the conical forward transportation method can form a certain compression effect, thereby improving the compression tightness of the raw materials.
[0052] Specifically, in one embodiment, the angle between the main screw flight 21 and the axis of the screw body 20 is in the range of 35°-45°.
[0053] In the above scheme, this scheme found that when the angle between the main screw flight 21 and the axis of the screw body 20 is in the range of 35°-45°, the forward extrusion transportation of the material is relatively gentle and the extrusion smoothness is high.
[0054] Specifically, a feeding funnel 111 is provided at the feeding port 11;
[0055] In the above solution, the feed funnel 111 can guide the material, thereby allowing the material to enter the material cavity through the feed port 11 more smoothly.
[0056] The above description is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application fall within the scope of the technical solution of the present application.
Claims
1. A 3D printing wire production extrusion device, characterized by: include An outer shell, wherein a material cavity is formed in the outer shell, a material inlet communicating with the material cavity is formed on a side wall of the outer shell near the first end, and an extrusion head is provided at an end away from the first end; A rotary drive member, a heating assembly and an extrusion screw, wherein the rotary drive member is provided on the outer shell and a driving end thereof is provided through the outer shell and connected to the extrusion screw, and the extrusion screw is provided in the material cavity; the heating assembly is used to heat the molten material; The extrusion screw has a feeding section, a compression section, a first material-distributing section, and a second material-distributing section in sequence along its axial direction; the extrusion screw includes a screw body and main screw fins arranged around the screw body; adjacent main screw fins form a main material groove; A first ridge is formed on the bottom surface of the main trough of the first material-striking section, and the extending direction of the first ridge is parallel to the axial direction of the screw body; The second material-leveling section is arranged at the end of the screw body, and a material-dividing ring is formed around the outer wall of the second material-leveling section. The material-dividing ring is provided with multiple material-dividing rings and is evenly spaced along the axial direction of the screw body. The material-dividing ring is composed of multiple spaced-apart prismatic protrusions, one of the diagonals of the prismatic protrusions is parallel to the axis of the screw body, and the other diagonal is perpendicular to the axis of the screw body. The prismatic protrusions of adjacent material-dividing rings are staggered.
2. The 3D printing wire production extrusion device according to claim 1, characterized in that: The included angle range of the first internal angle in the prismatic protrusion is 120°-135°; the first internal angle is the internal angle passed by a diagonal line parallel to the axis of the screw body.
3. The 3D printing wire production extrusion device according to claim 1, characterized in that: The outer wall of the screw body on the compression section is formed with secondary screw fins; the spiral direction of the secondary screw fins is parallel to the main screw fins; A material distribution groove is formed on the auxiliary screw flight along a direction perpendicular to the screw body.
4. The 3D printing wire production extrusion device according to claim 3, characterized in that: The depth of the material distribution trough is 1.5mm-2.5mm.
5. The 3D printing wire production extrusion device according to claim 1, characterized in that: The material cavity of the feeding section is tapered, and the inner diameter of the material cavity close to one end of the outer shell is larger than the inner diameter of the material cavity away from one end of the outer shell.
6. The 3D printing wire production extrusion device according to any one of claims 1 to 5, characterized in that: The angle between the main screw flight and the axis of the screw body is in the range of 35°-45°.
7. The 3D printing wire production extrusion device according to claim 6, characterized in that: A feeding funnel is provided at the feeding port.