High polymer material extrusion device for 3D printing

Abstract

The utility model discloses a high polymer material extrusion device for 3D printing, and relates to the technical field of 3D printing, the high polymer material extrusion device comprises a stock bin, an adapter port arranged at the discharge end of the stock bin and a nozzle connected with the adapter port, the bottom end of the nozzle is provided with a spray hole, a screw extrusion blade driven by a motor is arranged in the stock bin, and a feed port is arranged at the top end of the stock bin; an annular connecting opening is formed in the bottom end of the adapting opening, a connecting groove is formed in the peripheral side of the connecting opening, and a clamping rod connected with the connecting groove in a clamped mode is arranged in the nozzle; the connecting groove is composed of a clamping-in section and a clamping section which are connected with each other, the clamping-in section is obliquely arranged upwards, and the clamping section is obliquely arranged downwards. The clamping rod enters the clamping section after being clamped along the clamping section, and the nozzle is subjected to downward pressure of extruded materials in the material extrusion process of the stock bin, so that the clamping rod and the end part of the clamping section are mutually clamped; threaded connection is avoided, operation is simpler, more convenient and faster, and time needed for replacing the nozzle is shortened.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, specifically to a polymer material extrusion device for 3D printing. Background Technology

[0002] With the rapid development of 3D printing technology, it has been widely used in many fields such as industrial manufacturing, medical care, and construction. Polymer materials are commonly used raw materials in 3D printing, and the performance of their extrusion equipment directly affects the quality and production efficiency of 3D printed products.

[0003] Currently, existing polymer material extrusion devices for 3D printing have many shortcomings in their structural design. Traditional nozzle replacement methods are cumbersome. Nozzles often use simple threaded connections, and frequent replacements cause wear on the threads. With increasing replacement frequency, the thread profile may become blurred, reducing its precision. This wear affects the tightness of the fit between the nozzle and the interface. When different nozzle specifications need to be changed according to different printing requirements, operators often need to use tools and spend a lot of time disassembling and installing the nozzles, which greatly reduces the equipment's efficiency and cannot meet the demand for quick nozzle changes in actual production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a polymer material extrusion device for 3D printing.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A polymer material extrusion device for 3D printing includes a hopper, a converter installed at the discharge end of the hopper, and a nozzle connected to the converter and having a spray hole at the bottom. The hopper is equipped with a motor-driven spiral extrusion blade, and a feeding port is provided at the top of the hopper.

[0007] The bottom of the adapter is provided with an annular connection port, and a connection groove is provided around the connection port. The nozzle is provided with a locking rod that engages with the connection groove.

[0008] The connecting groove is composed of a snap-in section and a clamping section connected to each other, wherein the snap-in section is inclined upward and the clamping section is inclined downward.

[0009] After the clamping rod is inserted into the clamping section, it enters the clamping section. During the material extrusion process in the hopper, the nozzle is subjected to downward pressure from the extruded material, causing the clamping rod and the end of the clamping section to jam against each other.

[0010] Preferably, the nozzle is provided with an annular receiving port, the top of which is inserted into and tightly fitted to the inside of the connecting port, and a spiral guide plate is provided in the receiving port; the guide plate is subjected to the component force of the extruded material along the circumferential direction during the extrusion process in the hopper, increasing the pressure between the clamping rod and the end of the clamping section.

[0011] Preferably, a docking groove is formed between the material inlet and the nozzle, and the clamp is horizontally arranged in the docking groove; a first flow guide surface in the shape of an inverted round frustum is provided at the top of the material inlet, and a second flow guide surface is provided between the first flow guide surface and the nozzle; the top of the second flow guide surface is set as a circular structure, the bottom of the second flow guide surface has the same shape as the nozzle, and the cross-section of the second flow guide surface is set as an inverted trapezoidal surface.

[0012] Preferably, the upper part of the adapter is connected to the bottom of the hopper via a threaded cylinder, and the lower part of the adapter is provided with a guide cylinder, which is configured as an inverted frustum-shaped structure, and the connection port is located at the bottom of the guide cylinder.

[0013] Preferably, the connecting grooves are arranged in a ring array of multiple groups, and the end of the snap-in section away from the snap-fit ​​section is rounded to form a flared structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The connector is connected to the clamping rod inside the nozzle via the connecting groove at the bottom of the adapter. The shape of the connecting groove allows the clamping rod to be inserted along the clamping section. When the material is extruded from the hopper, the downward pressure of the extruded material will cause the clamping rod to lock into place with the end of the clamping section. This ensures that the nozzle is firmly connected to the adapter during operation, preventing the nozzle from loosening or falling off due to pressure, vibration, or other factors when extruding polymer materials, thus enhancing the structural stability of the entire device.

[0016] 2. When it is necessary to replace the nozzle, the user can operate it relatively easily; simply move the locking rod out from the locking section in the opposite direction of the locking section to remove the nozzle from the adapter; this avoids the need to use tools to disassemble the complex threaded connection, making the operation simpler and faster, greatly shortening the time required to replace the nozzle, and improving the efficiency of the equipment. This advantage is especially evident when different specifications of nozzles need to be frequently replaced according to different 3D printing tasks. Attached Figure Description

[0017] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the adapter structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the nozzle structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the adapter and nozzle assembly of this utility model.

[0022] The diagram shows the following labels: 1. Hopper; 11. Feeding port; 2. Adapter; 21. Threaded cylinder; 22. Guide cylinder; 23. Connection port; 24. Connection groove; 3. Nozzle; 31. Spray hole; 32. Material inlet; 33. Connecting groove; 34. Clamping rod; 35. Flow guide surface one; 36. Flow guide surface two; 37. Flow guide plate. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Example

[0025] like Figure 1 As shown, a polymer material extrusion device for 3D printing mainly consists of a hopper 1, an adapter 2, and a nozzle 3. The hopper 1 is the component for storing polymer materials, and a feeding port 11 is provided at the top of the hopper 1 for convenient addition of polymer materials. Inside the hopper 1, a spiral extrusion blade driven by a motor is installed. After the motor starts, the rotation of the spiral extrusion blade pushes the polymer material in the hopper 1 toward the discharge end.

[0026] Please see Figure 2The adapter 2 serves as a connection and transition component between the hopper 1 and the nozzle 3. Its upper part is connected to the bottom of the hopper 1 via a threaded cylinder 21. By rotating the adapter 2, it can be securely installed on the hopper 1, ensuring a tight seal and stable connection between the two. A guide cylinder 22 is located at the lower part of the adapter 2. The guide cylinder 22 has an inverted frustum shape, which helps guide the polymer material extruded from the hopper 1 to flow smoothly downwards. An annular connection port 23 is located at the bottom of the guide cylinder 22, and connection grooves 24 are provided around the connection port 23. Multiple sets of connection grooves 24 are arranged in a circular array. Each set of connection grooves 24 consists of an interlocking insertion section and a clamping section. The insertion section is inclined upwards, and the clamping section is inclined downwards. The end of the insertion section away from the clamping section is rounded to form a flared structure, which facilitates the insertion operation of the clamping rod 34 on the nozzle 3.

[0027] Please see Figure 3 The nozzle 3 has an orifice 31 at its bottom end, which is used to extrude polymer materials to achieve 3D printing. As the final material extrusion point, the orifice 31 determines the shape and size of the extruded material. Users can choose nozzles 3 with different shapes and sizes of orifices 31 according to different printing needs.

[0028] The nozzle 3 has an annular receiving port 32 inside. During assembly, the top of the receiving port 32 is inserted into the inside of the connecting port 23 and fits tightly against the inside of the connecting port 23, thereby realizing the material transfer between the adapter 2 and the nozzle 3.

[0029] A mating groove 33 is formed between the receiving port 32 and the nozzle 3. A locking rod 34 is horizontally positioned within the mating groove 33 and engages with the connecting groove 24. During installation, the connecting port 23 is inserted into the mating groove 33, and the locking rod 34 is inserted along the locking section of the connecting groove 24. Due to the flared structure at one end of the locking section, the locking rod 34 can easily enter the locking section and then the clamping section. When the hopper 1 is not being emptied, the locking rod 34 can remain in the clamping section under the gravity of the nozzle 3, completing the initial installation of the nozzle 3.

[0030] During the extrusion process, as the extruded material is continuously extruded downwards, it exerts downward pressure on the nozzle 3. The clamping rod 34 locks the downward end of the clamping section, thereby maintaining the stability of the nozzle 3 itself.

[0031] Please see Figure 4The receiving port 32 is provided with a spiral guide plate 37. During the extrusion process, in addition to the downward pressure between the spiral guide plate 37 and the extruded material, a component force along the circumferential direction is also generated. This component force increases the pressure between the clamping rod 34 and the end of the clamping section in the connecting groove 24, further strengthening the connection between the nozzle 3 and the adapter 2, and ensuring that the nozzle 3 will not loosen or fall off due to the downward pressure of the extruded material during the extrusion process.

[0032] The polymer material is first guided by the inverted frustum-shaped flow guide surface 35, making it easier to enter the receiving port 32. Then, it is guided by the flow guide surface 36 to the nozzle 31. The top of the flow guide surface 36 is circular, and its bottom is the same shape as the nozzle 31. The cross-section of the flow guide surface 36 is an inverted trapezoid. This inverted trapezoidal cross-section helps to gather and organize the material, ensuring that the material is extruded uniformly and stably from the nozzle 31, providing a high-quality extruded material flow for subsequent 3D printing.

[0033] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A polymer material extrusion device for 3D printing, characterized in that: It includes a hopper (1), a converter (2) installed at the discharge end of the hopper (1), and a nozzle (3) connected to the converter (2) and having a spray hole (31) at the bottom. The hopper (1) is equipped with a motor-driven spiral extrusion blade, and a feeding port (11) is provided at the top of the hopper (1). The adapter (2) has an annular connection port (23) at its bottom end, and a connection groove (24) is provided around the connection port (23). The nozzle (3) has a locking rod (34) inside that engages with the connection groove (24). The connecting groove (24) is composed of a snap-in section and a clamping section connected to each other, wherein the snap-in section is inclined upward and the clamping section is inclined downward; After the clamping rod (34) is inserted into the clamping section, it enters the clamping section. During the extrusion process in the hopper (1), the nozzle (3) is subjected to downward pressure from the extruded material, causing the clamping rod (34) to jam against the end of the clamping section.

2. The polymer material extrusion device for 3D printing according to claim 1, characterized in that: The nozzle (3) is provided with an annular receiving port (32). The top of the receiving port (32) is inserted into the inner side of the connecting port (23) and fits tightly against the inner side of the connecting port (23). A spiral guide plate (37) is provided in the receiving port (32). The guide plate (37) is subjected to the component force of the extruded material along the circumferential direction during the extrusion process in the hopper (1), which increases the pressure between the clamping rod (34) and the end of the clamping section.

3. The polymer material extrusion device for 3D printing according to claim 2, characterized in that: A docking groove (33) is formed between the receiving port (32) and the nozzle (3), and the clamp (34) is horizontally arranged in the docking groove (33); the top of the receiving port (32) is provided with an inverted frustum-shaped flow guide surface one (35), and a flow guide surface two (36) is provided between the flow guide surface one (35) and the spray hole (31); the top of the flow guide surface two (36) is set as a circular structure, the bottom of the flow guide surface two (36) is the same shape as the spray hole (31), and the cross section of the flow guide surface two (36) is set as an inverted trapezoidal surface.

4. A polymer material extrusion apparatus for 3D printing according to any one of claims 1 to 3, characterized in that: The upper part of the adapter (2) is connected to the bottom of the hopper (1) through the threaded cylinder (21). The lower part of the adapter (2) is provided with a guide cylinder (22). The guide cylinder (22) is configured as an inverted frustum structure. The connection port (23) is located at the bottom of the guide cylinder (22).

5. A polymer material extrusion apparatus for 3D printing according to any one of claims 1 to 3, characterized in that: The connecting grooves (24) are arranged in a ring array with multiple sets, and the end of the snap-in section away from the snap-fit ​​section is rounded to form a flared structure.

Images