Large-diameter spray head for high-speed 3D printing
By setting a flow blocking rod and heating sleeve in a 3D-printed large-diameter nozzle, uniform heating and blocking of materials are achieved, solving the problems of slow printing speed and uneven discharge of large medical devices, and providing efficient and accurate solutions .
Patent Information
- Application Number
- CN202421047630.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-14
AI Technical Summary
At present, 3D printers are slow when printing large medical devices and unevenly discharged materials. The existing large nozzles are prone to leaking or choking materials when they are stopped, and lack efficient and accurate solutions.
A high-speed 3D printed large-diameter nozzle was designed. The blocking rod was installed inside the outlet cavity and the heat sleeve was used to transfer heat to ensure that the material did not cure when it was stopped. The blocking rod achieved blocking and shunting effect. , heat the material evenly to prevent leakage and uneven discharge.
It improves the printing speed and accuracy of large medical devices, ensures uniform discharge of materials, solves the problems of leakage and uneven discharge, and provides efficient and accurate solutions for the medical industry.
Smart Images
Figure CN222223480U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of 3D printing, in particular to a large-caliber nozzle for high-speed 3D printing. Background Art
[0002] 3D printing, also known as additive manufacturing, produces three-dimensional entities by continuously stacking physical layers and adding materials layer by layer. 3D printing is a type of rapid prototyping technology. 3D printers are also called three-dimensional printers (3DP), which are machines using rapid prototyping technology. Currently, three-dimensional printers are used to manufacture products.
[0003] As the medical industry's demand for medical devices increases, the development of 3D printing technology has also provided a new solution for the medical industry. However, at this stage, 3D printers are developing in the direction of high precision and small nozzles. Most of the 3D printers on the market can only produce small medical devices, such as implants, models, etc. As for large medical devices, such as human bones, prostheses and other rehabilitation braces, the printing speed and timeliness of small nozzle 3D printers are greatly flawed. When the existing print head is increased in size, it is impossible to ensure that the material will not leak during the pause / retraction operation during the printing process. There may be material jamming after the pause, and uneven material discharge. For these problems, there is currently no efficient and accurate solution. Summary of the invention
[0004] The purpose of the utility model is to propose a large-caliber nozzle for high-speed 3D printing, which realizes flow blocking and diversion by arranging a flow blocking rod inside the outlet cavity, solves the problems of material leakage and uneven material discharge from the print head, and uniformly heats the material inside the outlet cavity through the flow blocking rod. After the operation is paused, it is ensured that the material will not solidify and block the outlet.
[0005] The technical solution adopted by the utility model is as follows:
[0006] The utility model discloses a large-caliber nozzle for high-speed 3D printing, comprising a material-guiding heat-conducting pipe, wherein the material-guiding heat-conducting pipe has a channel for material circulation and an outlet cavity near the material outlet, and the caliber of the outlet cavity is larger than the diameter of the channel, a plurality of baffle rods are radially arranged in the outlet cavity, and further comprising a heating sleeve, wherein the heating sleeve is arranged on the outer wall of the material-guiding heat-conducting pipe, wraps the material-guiding heat-conducting pipe as a whole, and transfers heat to the material-guiding heat-conducting pipe.
[0007] Furthermore, the plurality of baffle bars are evenly and staggeredly distributed in the radial direction and the axial direction of the outlet cavity.
[0008] Furthermore, one end of the baffle rod is vertically inserted into the outlet cavity along the material flow direction, and one end of the baffle rod is located on the outer wall of the material guiding heat conducting pipe and is provided with a protrusion.
[0009] Furthermore, the raised surface of the baffle rod is flat and in close contact with the inner wall of the heating sleeve, so that heat is transferred to the baffle rod through the heating sleeve.
[0010] Furthermore, the outlet cavity is a cavity with a large middle portion and small diameters at both ends, and the diameters at both ends are larger than the diameter of the channel.
[0011] Furthermore, the outlet diameter of the outlet cavity is 4 mm to 10 mm.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0013] 1. The utility model is a large-caliber nozzle for high-speed 3D printing. The material in the heat-conducting guide tube is heated by a heating sleeve to ensure that the material maintains a viscous liquid state. In addition, a baffle rod is arranged inside the outlet cavity. Heat is transferred to the baffle rod by the heating sleeve, so that the baffle rod heats the material inside the outlet cavity evenly. After the operation is paused, it is ensured that the material will not solidify and block the outlet. The baffle rod can also achieve baffle and diverter effects, so that the material is evenly distributed in the outlet area of the large-caliber print head outlet cavity, increasing the resistance to the passage of the material, and solving the problems of leakage and uneven discharge of the print head. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work, including:
[0015] Figure 1 It is a cross-sectional view of the utility model;
[0016] Figure 2 It is a structural schematic diagram of the utility model.
[0017] Description of the accompanying figures: 1-material guiding heat conducting pipe, 101-channel, 102-outlet cavity, 2-blocking rod, 201-protrusion, 3-heating jacket. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0019] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.
[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0021] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0022] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0023] Embodiment 1
[0024] like Figure 1-2 As shown, the utility model is a large-caliber nozzle for high-speed 3D printing, including a material-guiding heat-conducting pipe 1, wherein the material-guiding heat-conducting pipe 1 has a channel 101 for material circulation, and an outlet cavity 102 close to the material outlet, and the caliber of the outlet cavity 102 is larger than the diameter of the channel 101, and a plurality of baffle rods 2 are radially arranged in the outlet cavity 102, and also includes a heating sleeve 3, wherein the heating sleeve 3 is sleeved on the outer wall of the material-guiding heat-conducting pipe 1, wraps the material-guiding heat-conducting pipe 1 as a whole, and transfers heat to the material-guiding heat-conducting pipe 1.
[0025] 3D printers are used to print large medical devices. To increase the printing speed, the caliber can be increased. However, during the printing process, the operation of pausing / retracting cannot ensure that the material will not leak. Material jamming and uneven material discharge may occur after pausing. The utility model provides a large-caliber nozzle for high-speed 3D printing. For large-caliber 3D printing of more than 3mm, the heat-conducting guide tube 1 used for material transmission is divided into two parts, one part is the channel 101 for material circulation, and the other part is the outlet cavity 102 near the material outlet. The outlet cavity 102 is a cavity with a large middle part and small diameter at both ends, and the calibers at both ends are larger than the diameter of the channel 101. The caliber of the outlet of the outlet cavity 102 is 4mm to 10mm. This embodiment can use a 5mm caliber outlet to increase the printing speed, which can be applied to the printing of large products.
[0026] To solve the above problems, the utility model arranges a heating sleeve 3 outside the heat-conducting guide tube 1, and the heating sleeve 3 transfers heat to the heat-conducting guide tube 1 to heat the material in the heat-conducting guide tube 1 to become a viscous liquid material. The viscous liquid material enters the outlet cavity 102 from the channel 101, and the heating sleeve 3 continues to heat the material in the outlet cavity 102 to ensure that the material maintains a viscous liquid state and will not solidify and block the print head from discharging material. The baffle rod 2 can realize the baffle and diversion effects, increase the resistance to material passing, solve the problems of print head leakage and uneven discharge, and make the material evenly distributed in the outlet area of the large-diameter print head outlet cavity 102. It can be used to make large medical devices in the medical industry, and provides a more efficient and accurate solution for printing large medical devices in the medical industry.
[0027] Embodiment 2
[0028] This embodiment is a further description of the present invention.
[0029] like Figure 1 As shown, based on the first embodiment, in a preferred embodiment of the utility model, a plurality of baffle rods 2 are evenly and staggeredly distributed in the radial direction and the axial direction of the outlet cavity 102 .
[0030] With the above structure, the evenly staggeredly distributed flow-blocking rods 2 can achieve flow-blocking and flow-dividing functions, making the material distribution more even.
[0031] Embodiment 3
[0032] This embodiment is a further description of the present invention.
[0033] like Figure 1 As shown, based on the above embodiments, in a preferred embodiment of the utility model, one end of the baffle rod 2 is vertically inserted into the outlet cavity 102 along the material flow direction, one end of the baffle rod 2 is located on the outer wall of the material guiding heat conducting tube 1 and is provided with a protrusion 201.
[0034] Preferably, the protrusion 201 of the baffle rod 2 has a flat surface and is in close contact with the inner wall of the heating sleeve 3 , so that heat is transferred to the baffle rod 2 through the heating sleeve 3 .
[0035] The prior art only performs local heating on the material and lacks continuous heat preservation at the print head outlet. The utility model transfers heat to the baffle rod 2 through the heating sleeve 3, and evenly heats the material inside the outlet cavity 102 through the baffle rod 2. After the pause operation, it is ensured that the material will not solidify and block the outlet, thereby reducing the problem of poor discharge caused by uneven heating of the material.
[0036] The above is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be thought of by a person skilled in the art within the technical scope disclosed by the utility model without creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.
Claims
1. A large-caliber nozzle for high-speed 3D printing, comprising a material guiding heat conducting pipe (1), characterized in that: The material-guiding heat-conducting pipe (1) has a channel (101) for material circulation and an outlet chamber (102) near the material outlet, and the caliber of the outlet chamber (102) is larger than the diameter of the channel (101). A plurality of baffle rods (2) are radially arranged in the outlet chamber (102), and a heating sleeve (3) is also included. The heating sleeve (3) is sleeved on the outer wall of the material-guiding heat-conducting pipe (1) to wrap the material-guiding heat-conducting pipe (1) as a whole and transfer heat to the material-guiding heat-conducting pipe (1).
2. A large-caliber nozzle for high-speed 3D printing according to claim 1, characterized in that: The plurality of baffle bars (2) are evenly and staggeredly distributed in the radial direction and the axial direction of the outlet cavity (102).
3. A large-caliber nozzle for high-speed 3D printing according to claim 1, characterized in that: One end of the baffle rod (2) is vertically inserted into the outlet cavity (102) along the material flow direction; one end of the baffle rod (2) is located on the outer wall of the material guiding heat conducting pipe (1) and is provided with a protrusion (201).
4. A large-caliber nozzle for high-speed 3D printing according to claim 3, characterized in that: The protrusion (201) of the baffle rod (2) has a flat surface and is in close contact with the inner wall of the heating sleeve (3), so that heat is transferred to the baffle rod (2) through the heating sleeve (3).
5. A large-caliber nozzle for high-speed 3D printing according to claim 1, characterized in that: The outlet cavity (102) is a cavity with a large middle portion and small diameters at both ends, and the diameters at both ends are larger than the diameter of the channel (101).
6. A large-caliber nozzle for high-speed 3D printing according to claim 5, characterized in that: The outlet diameter of the outlet cavity (102) is 4 mm to 10 mm.