3D printing nozzle structure facilitating biocompatible wire printing

Abstract

The utility model provides a kind of 3D printing nozzle structure of being convenient for biocompatible wire printing belongs to 3d printer accessory technical field.It solves the problem of existing co-extrusion precision is not high and internal temperature is unstable.The 3D printing nozzle structure of being convenient for biocompatible wire printing, including nozzle main body, nozzle main body includes the shell body with assembly cavity and is connected with the inner core pipe of shell body in assembly cavity and is set in the inner core pipe, the inner wall on shell body at assembly cavity lower end portion is provided with and is connected with it, and with inner core pipe is in contact, and be used to limit the position of inner core pipe extrusion joint, the end face of this extrusion joint is provided with the through hole that is penetrated through extrusion joint and is matched with inner core pipe, inner core pipe is provided with co-extrusion runner in, and co-extrusion runner is arranged in Y type structure and is convenient for material mixing extrusion, shell body is provided with constant temperature unit and is connected with it and is used to keep internal temperature.This utility model has the advantages of high co-extrusion precision and internal temperature constant.

Description

Technical Field

[0001] This utility model belongs to the technical field of 3D printer accessories, and relates to a 3D printing nozzle structure that facilitates printing with biocompatible filaments. Background Technology

[0002] 3D printing technology can form parts with complex shapes at low cost and high efficiency, and is widely used in aerospace, automotive manufacturing and biomedicine. Commonly used additive manufacturing technologies include photopolymerization, material extrusion molding, powder coating, material jetting, lamination, powder bed fusion, and direct energy deposition. Among these additive manufacturing technologies, fused deposition modeling or filament fabrication forms objects by melting and extruding thermoplastic materials and stacking them layer by layer. Due to its simple structure, low cost, low difficulty of use and high degree of printing freedom, it suffers from insufficient co-extrusion control precision and internal temperature imbalance during actual operation, which affects the co-extrusion mixing of materials and thus fails to meet the application requirements. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the prior art by providing a nozzle structure that offers high co-extrusion precision and maintains internal temperature.

[0004] The objective of this utility model can be achieved through the following technical solution: A 3D printing nozzle structure for facilitating biocompatible filament printing, comprising a nozzle body, characterized in that the nozzle body includes an outer shell with an assembly cavity and an inner core tube disposed within the assembly cavity and connected to the outer shell. The upper end of the inner core tube extends axially outward and extends through the outer shell, while the lower end of the inner core tube is located within the outer shell. An extrusion connector is disposed on the inner wall of the outer shell at the lower end of the assembly cavity, connected to and abutting against the inner core tube, and used to restrict the position of the inner core tube. An axial through hole is provided on the end face of the extrusion connector and cooperates with the inner core tube. A co-extrusion channel with a Y-shaped structure is provided inside the inner core tube to facilitate material mixing and extrusion. The outer peripheral wall of the inner core tube at the lower end is conical, and its outer diameter gradually decreases from top to bottom, with a gap between it and the corresponding inner wall of the outer shell. A thermostatic unit is disposed on the outer shell and connected to it to maintain the internal temperature.

[0005] In the above-mentioned 3D printing nozzle structure that facilitates biocompatible filament printing, the inner wall of the extrusion connector is set in a conical structure and its inner diameter gradually decreases from top to bottom. A sealing ring is provided on the inner peripheral wall of the upper end of the extrusion connector to connect with it and to enhance the sealing performance.

[0006] In the above-mentioned 3D printing nozzle structure that facilitates biocompatible filament printing, the constant temperature unit includes a heat source for providing hot air, an air inlet connector connected to the outer shell, and an air outlet connector also connected to the outer shell. The air inlet connector is located above the air outlet connector, and the air outlet connector is disposed at the gap between the outer shell and the inner core tube and is connected to it.

[0007] In the above-mentioned 3D printing nozzle structure that facilitates biocompatible filament printing, a spiral groove with a spiral structure is formed on the outer peripheral wall of the upper end of the inner core tube. The lower end of the spiral groove is located in the gap between the outer shell and the inner core tube. The air inlet is located at the upper end of the spiral groove and is connected to the spiral groove.

[0008] In the above-mentioned 3D printing nozzle structure that facilitates biocompatible filament printing, a temperature sensor connected to the outer shell and used to detect the temperature of the outer shell is provided inside the outer shell.

[0009] Compared with existing technologies, this 3D printing nozzle structure, which facilitates the printing of biocompatible filaments, enables thorough mixing and extrusion by setting up a co-extrusion channel. At the same time, a constant temperature unit is set up to maintain the internal temperature and prevent temperature changes from affecting the mixing and extrusion of materials. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of a 3D printing nozzle structure that facilitates printing with biocompatible filaments.

[0011] In the diagram, 1 is the outer shell; 2 is the inner core tube; 3 is the extrusion connector; 4 is the air inlet connector; and 5 is the air outlet connector. Detailed Implementation

[0012] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0013] like Figure 1As shown, this 3D printing nozzle structure, which facilitates biocompatible filament printing, includes a nozzle body. The nozzle body includes an outer shell 1 with an assembly cavity and an inner core tube 2 disposed within the assembly cavity and connected to the outer shell 1. The upper end of the inner core tube 2 extends axially outward and extends through the outer shell 1, while the lower end of the inner core tube 2 is located inside the outer shell 1. An extrusion connector 3 is disposed on the inner wall of the outer shell 1 at the lower end of the assembly cavity, connected to and abutting against the inner core tube 2, and used to restrict the position of the inner core tube 2. An axial through hole is formed on the end face of the extrusion connector 3 and mates with the inner core tube 2. A Y-shaped co-extrusion channel is formed inside the inner core tube 2 to facilitate material mixing and extrusion. The outer peripheral wall of the inner core tube 2 at the lower end is conical, and its outer diameter gradually decreases from top to bottom, leaving a gap between it and the corresponding inner wall of the outer shell 1. The inner wall of the extrusion connector 3 is provided with a thermostatic unit connected to it and used to maintain the internal temperature. The inner wall of the extrusion connector 3 is conical and its inner diameter gradually decreases from top to bottom. A sealing ring is provided on the inner peripheral wall of the upper end of the extrusion connector 3 and is connected to it to enhance the sealing performance. The thermostatic unit includes a heat source for providing hot air, an air inlet connector 4 connected to the outer shell 1, and an air outlet connector 5 also connected to the outer shell 1. The air inlet connector 4 is located above the air outlet connector 5. The air outlet connector 5 is located at the gap between the outer shell 1 and the inner core tube 2 and is connected to it. A spiral groove with a spiral structure is opened on the outer peripheral wall of the upper end of the inner core tube 2. The lower end of the spiral groove is located at the gap between the outer shell 1 and the inner core tube 2. The air inlet connector 4 is located at the upper end of the spiral groove and is connected to the spiral groove. A temperature sensor is provided inside the outer shell 1 and is connected to it to detect the temperature of the outer shell 1.

[0014] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0015] Although this document uses terms such as "etc." extensively, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A 3D printing nozzle structure for easy printing with biocompatible filaments, comprising a nozzle body, characterized in that, The nozzle body includes an outer shell (1) with an assembly cavity and an inner core tube (2) disposed in the assembly cavity and connected to the outer shell (1). The upper end of the inner core tube (2) extends axially outward and extends out of the outer shell (1), and the lower end of the inner core tube (2) is located inside the outer shell (1). An extrusion connector (3) is disposed on the inner wall of the outer shell (1) at the lower end of the assembly cavity, connected to it, abutting against the inner core tube (2), and used to limit the position of the inner core tube (2). The end face of the connector (3) is provided with an axial through-hole that passes through the extrusion connector (3) and cooperates with the inner core tube (2). The inner core tube (2) is provided with a Y-shaped co-extrusion channel that facilitates material mixing and extrusion. The outer peripheral wall of the inner core tube (2) at the lower end is provided with a conical structure, and its outer diameter gradually decreases from top to bottom, and there is a gap between it and the inner wall of the corresponding outer shell (1). The outer shell (1) is provided with a constant temperature unit connected to it and used to maintain the internal temperature.

2. The 3D printing nozzle structure for facilitating biocompatible filament printing according to claim 1, characterized in that, The inner wall of the extrusion connector (3) is set in a conical structure and its inner diameter gradually decreases from top to bottom. The inner peripheral wall of the extrusion connector (3) at the upper end is provided with a sealing ring connected to it and used to enhance the sealing performance.

3. The 3D printing nozzle structure for facilitating biocompatible filament printing according to claim 1, characterized in that, The constant temperature unit includes a heat source for providing hot air, an air inlet connector (4) connected to the outer shell (1), and an air outlet connector (5) also connected to the outer shell (1). The air inlet connector (4) is located above the air outlet connector (5), and the air outlet connector (5) is located at the gap between the outer shell (1) and the inner core tube (2) and is connected to it.

4. The 3D printing nozzle structure for facilitating biocompatible filament printing according to claim 3, characterized in that, The inner core tube (2) has a spiral groove with a spiral structure on the outer peripheral wall at the upper end. The lower end of the spiral groove is located at the gap between the outer shell (1) and the inner core tube (2). The air inlet connector (4) is located at the upper end of the spiral groove and is connected to the spiral groove.

5. A 3D printing nozzle structure for facilitating biocompatible filament printing according to claim 1, characterized in that, A temperature sensor is provided inside the outer shell (1) and is connected thereto for detecting the temperature of the outer shell (1).

Images