A nozzle for a 3D printer

Abstract

The present application discloses a nozzle for a 3D printer, which relates to the technical field of 3D printer accessories. It includes a base. An elevating member is axially provided inside the base. At both ends of the outside of the base, sliding members are respectively arranged radially opposite and slidably. An inclined guide block structure is provided between the sliding member and the elevating member. The inclined guide block structures on the two sliding members are arranged in a staggered manner. Two feed pipes for conveying different materials are arranged inside the base. The end of the feed pipe is axially extended with an outer arc-shaped cover. The sliding member includes an inner arc-shaped column that acts radially on the inside of the outer arc-shaped cover. The outer arc-shaped cover and the inner arc-shaped column are connected to a heater. The middle part of the inner arc-shaped column is set to be concave. The technical advantages of the application are as follows: By setting the sliding member and the elevating member, when switching materials, the plasticized material in the acting section of the heater is isolated and stored by using the concave cavity, reducing the mixing rate during material switching and also reducing the material switching loss; The different attitude control of the bilateral sliding members can be realized by using a single elevating member and a spring group.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printer accessories, and in particular to a nozzle for a 3D printer. Background Art

[0002] In the field of 3D printing technology, a dual-material switching 3D printer is a printing device that can achieve efficient and multifunctional printing. This type of printer mainly uses wire as the printing material. Through a specific extrusion structure, it can flexibly switch between two or more different wires, thereby completing the combined printing of multiple materials in one printing job. Traditional 3D printers can usually only use a single material for printing during the printing process, which to a certain extent limits the diversity and functionality of the printed products. The dual-material switching 3D printer breaks this limitation. When the main print head is printing, the secondary print head is in standby mode, and its discharge port will not collide with the material ejected by the main print head, thereby avoiding interference problems during the printing process and ensuring the quality of the printed product; the dual-material switching 3D printer has broad application prospects and development potential in the field of 3D printing technology due to its high efficiency and multifunctionality.

[0003] In the process of dual-material switching performed by a 3D printer, ensuring that the plasticized material at the end is completely discharged is a key link in improving the quality of the printed product, because it can effectively prevent the mixing of different materials, thereby ensuring the structural integrity of the printed part and the consistency of material properties; however, technicians are faced with the challenge of how to reduce the waste of consumables, because frequent material switching is often accompanied by material residues and unnecessary losses. The complexity of material switching is not only reflected in the operating process, but also in how to minimize the material waste generated by each switch while ensuring the printing quality; in addition, the energy consumption of the heating module during the material plasticization process is also a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The device provides a nozzle for a 3D printer, and the specific implementation is as follows:

[0005] A nozzle for a 3D printer, comprising:

[0006] A base, a lifting member is axially arranged on the inner side of the base, sliding members are slidably arranged at two ends of the outer side of the base, and an oblique guide block structure is arranged between the sliding member and the lifting member. The oblique guide block structures on the two sliding members are arranged in a staggered manner, and the radial opening of any sliding member is controlled by the lifting of the lifting member, and a spring group for resetting the other sliding member is arranged between the sliding member and the base;

[0007] The base is internally provided with two feed pipes for conveying different materials. The ends of the feed pipes are axially extended with outer arc-shaped covers. The sliding member includes an inner arc-shaped column that acts radially on the inner side of the outer arc-shaped cover. The outer arc-shaped cover and the inner arc-shaped column are connected to a heater. The middle part of the inner arc-shaped column is concave. When the material is switched, after the outer arc-shaped cover and the inner arc-shaped column are radially abutted, the unused plasticized material is enclosed in the concave cavity.

[0008] Based on the above technical solutions, by setting the combination of the sliding member and the lifting member, during the process of material switching, it is possible to effectively isolate and store the plasticized material in the action section of the heater by using a concave cavity. This design not only significantly reduces the mixing rate during material switching but also effectively reduces the loss during the material switching process. Only through the configuration of a single lifting member and a spring group, precise control of different postures of the bilateral sliding members is achieved, which not only further simplifies the structure of the nozzle but also greatly improves the stability and reliability of material switching.

[0009] Preferably, the sliding member further includes a box body provided at the rear end of the inner arc-shaped column. The box body is divided into an independent heating chamber and a surplus material chamber. The surplus material chamber is arranged between the two heating chambers. The heating chamber is provided with an open hole for the end of the outer arc-shaped cover to insert. The heater is arranged in the heating chamber, and its output end abuts against the side of the outer arc-shaped cover.

[0010] Preferably, the control end of the heater is electrically connected to a travel switch. The end of the outer arc-shaped cover is set as an inclined surface. The travel switch abuts against the high position end of the inclined surface, and when it corresponds to the low position end of the inclined surface, it serves as a trigger signal for the heater to start.

[0011] Based on the above technical solutions, by introducing a travel switch, the linkage control between the heater and the posture of the sliding member is realized. When the inner arc-shaped column and the outer arc-shaped cover are in an open state to provide a falling channel for the material, the heater can be automatically started. In addition, the circumferential surfaces of the inner arc-shaped column and the outer arc-shaped cover are of a heat conducting sheet structure, which enables the heater to perform thermoplastic treatment on solid materials through an efficient heat conduction method, not only improving the convenience of operation but also ensuring the uniformity and efficiency of the material thermoplastic process.

[0012] Preferably, the side parts of the feed pipes are respectively communicated with an air duct and an assembly duct along different tangential directions. The three are communicated at the same point. An air inflation generating member is installed in the assembly duct. The output end of the air inflation generating member is provided with an airbag that can act on the entire cross-section of the feed pipe. When the airbag is in a retracted state, the air duct is communicated with the feed pipe.

[0013] Preferably, an upper through hole is opened at the top of the inner arc-shaped column. The upper through hole is communicated with the surplus material chamber, and when the upper through hole is axially corresponding to the output end of the feed pipe, it provides surplus material collection for the plasticized end of the solid material.

[0014] Based on the above technical solutions, by setting up an air duct, an inflation generating component, and an airbag, the hot air isolation of the solid section of the material in the storage state can be achieved by means of the inflation of the airbag. At the same time, by using the air duct to supply external air flow, the elimination of the hot air in the solid section of the material and the cleaning of the material at the joint between the solid section and the plastic section can be realized.

[0015] Preferably, an assembly hole is provided at the bottom of the inner arc column, and a fan is installed in the assembly hole.

[0016] Preferably, a nozzle is installed below the base through a connecting rod, and a cover body is sleeved at the edge between the base and the nozzle.

[0017] Preferably, the nozzle is of a tee structure, and its two input ports are vertically corresponding to the assembly gaps between the outer arc cover and the inner arc column respectively, and the two input ports communicate and converge at the output port.

[0018] Based on the above technical solutions, by setting up a nozzle and a fan of a tee structure, the complete cleaning of a small amount of plasticized material at the end of the nozzle can be achieved, and the material in the switching state is divided into multiple sections for separate treatment, further reducing the material loss.

[0019] Preferably, a number of second trapezoidal blocks are equidistantly arranged along the length direction of the inner arc column on the box body; a cylinder with an output end connected to the lifting member is built in the base, and a first trapezoidal block that abuts against the second trapezoidal block is provided on the side of the lifting member, and their inclined faces abut against each other.

[0020] Preferably, a guide rail is provided below the base, a slider that is slidably connected to the guide rail is provided on the box body, and a spring group is arranged between the end parts of the slider and the guide rail.

[0021] In summary, the present application includes the following beneficial technical effects:

[0022] 1. By setting up a sliding member and a lifting member, during the material switching, the plasticized material in the acting section of the heater is isolated and preserved by using the concave cavity, reducing the mixing rate during material switching and also reducing the material switching loss; the use of a single lifting member and a spring group can realize the control of different postures of the bilateral sliding members, further simplifying the structure of the nozzle and improving the stability of material switching;

[0023] 2. The structure of the present invention is simple. By setting up a travel switch, the attitude linkage between the heater and the sliding member is realized, that is, when the inner arc column and the outer arc cover are in an open state for the material to fall, the heater is automatically turned on;

[0024] 3. By setting up an air duct, an inflation generating component, and an airbag, the hot air isolation of the solid section of the material in the storage state can be achieved by means of the inflation of the airbag. At the same time, by using the air duct to supply external air flow, the elimination of the hot air in the solid section of the material and the cleaning of the material at the joint between the solid section and the plastic section can be realized;

[0025] 4. The present invention can completely clean a small amount of plasticized material at the end of the nozzle by setting a nozzle and a fan with a tee structure, and divide the material in the switching state into multiple ends for separate processing, further reducing material loss. Description of the Drawings

[0026] Figure 1 is a schematic diagram of the external structure of the present invention;

[0027] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 is the present invention Figure 2 the explosion structure schematic in Figure 1 ;

[0029] Figure 4 is the present invention Figure 2 the explosion structure schematic in Figure 2 ;

[0030] Figure 5 is a schematic diagram of the explosion structure of the sliding member and the lifting member in the present invention;

[0031] Figure 6 is a schematic diagram of the sectional structure of the base in the present invention;

[0032] Figure 7 is the structural schematic of the base and the sliding member in the present invention Figure 1 ;

[0033] Figure 8 is a schematic diagram of the sectional structure of the base and the sliding member in the present invention;

[0034] Figure 9 is a schematic diagram of the sectional structure of the sliding member in the present invention;

[0035] Figure 10 is the structural schematic of the base and the sliding member in the present invention Figure 2 .

[0036] Description of the Reference Numerals:

[0037] 1. Base, 2. Nozzle, 3. Sliding member, 4. Spring group, 5. Lifting member, 6. Heater, 7. Travel switch, 10. Cover, 11. Connecting rod, 12. Cylinder

[0038] 101. Guide rail, 102. Feed pipe, 103. Inflation generating part, 104. Air duct, 105. Airbag, 106. Outer arc-shaped cover, 107. Oblique surface, 201. Output port, 202. Input port, 301. Box body, 302. Second trapezoidal block, 303. Slide block, 304. Inner arc-shaped column, 305. Open hole, 306. Upper through hole, 307. Assembly hole, 3011. Heating cavity, 3012. Remnant material cavity, 501. First trapezoidal block. Detailed implementation manners

[0039] The following describes the specific implementation manners of the present invention in conjunction with the accompanying drawings and embodiments:

[0040] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0041] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0042] The following combines the attached Figures 1-10 This application is further described in detail.

[0043] The embodiment of this application discloses a nozzle for a 3D printer.

[0044] Embodiment 1

[0045] Refer to Figures 1 to 10, this embodiment discloses a nozzle for a 3D printer, which includes a base 1. An elevating member 5 is axially arranged inside the base 1. At both ends of the outside of the base 1, sliding members 3 are respectively arranged radially opposite and slidably. There is an inclined guide block structure between the sliding member 3 and the elevating member 5. The inclined guide block structures on the two sliding members 3 are arranged in a staggered manner. By lifting and lowering the elevating member 5, the radial opening of any one of the sliding members 3 is controlled. And a spring group 4 for resetting the other sliding member 3 is arranged between the sliding member 3 and the base 1. Two feed pipes 102 for conveying different materials are arranged inside the base 1. The end of the feed pipe 102 is axially extended with an outer arc-shaped cover 106. The sliding member 3 includes an inner arc-shaped column 304 that acts radially on the inside of the outer arc-shaped cover 106. The outer arc-shaped cover 106 and the inner arc-shaped column 304 are connected to a heater 6. The middle part of the inner arc-shaped column 304 is set to be concave. When the material is switched, after the outer arc-shaped cover 106 and the inner arc-shaped column 304 are radially abutted, the unused plasticized material is enclosed in the concave cavity, thereby realizing the heat-insulated preservation of the plasticized material heated at the heater 6 for subsequent secondary utilization after the material is switched.

[0046] A plurality of second trapezoidal blocks 302 are equidistantly arranged on the box body 301 along the length direction of the inner arc-shaped column 304. A cylinder 12 with an output end connected to the elevating member 5 is arranged inside the base 1. A first trapezoidal block 501 that abuts against the second trapezoidal block 302 is arranged on the side of the elevating member 5. The inclined faces of the two are abutted against each other. In this structure, a guide rail 101 is arranged below the base 1. A slider 303 that is slidably connected to the guide rail 101 is arranged on the box body 301. And the spring group 4 is arranged between the slider 303 and the end of the guide rail 101.

[0047] Embodiment 2

[0048] Referring to Figures 7 to 9 , and based on Embodiment 1, this embodiment also provides a nozzle for a 3D printer. The sliding member 3 includes a box body 301 arranged at the rear end of the inner arc-shaped column 304. A heating cavity 301 is arranged inside the box body 301. An open hole 305 for inserting the end of the outer arc-shaped cover 106 is opened in the heating cavity 3011. The heater 6 is arranged in the heating cavity 3011, and its output end abuts against the side of the outer arc-shaped cover 106. In this structure, the control end of the heater 6 is electrically connected to a travel switch 7. The end of the outer arc-shaped cover 106 is set to be an inclined surface 107. The travel switch 7 abuts against the high end of the inclined surface 107. When it corresponds to the low end of the inclined surface 107, it is used as a trigger signal for turning on the heater 6. The control of the on state of the heater 6 is realized by using the travel switch 7. When a vertical gap appears between the outer arc-shaped cover 106 and the inner arc-shaped column 304, the heater 6 is turned on, and when the vertical gap disappears, the heater 6 is turned off, thereby reducing energy consumption.

[0049] Embodiment 3

[0050] Referring to Figures 6 to 9, and based on the above embodiments, this embodiment further provides a nozzle for a 3D printer. The side parts of the feed pipe 102 are respectively communicated with an air duct 104 and an assembly duct along different tangential directions. The three are communicated at the same point. An air inflation generating part 103 is installed in the assembly duct. The output end of the air inflation generating part 103 is provided with an airbag 105 that can act on the entire cross-section of the feed pipe 102. When the airbag 105 is in the retracted state, the air duct 104 is communicated with the feed pipe 102.

[0051] The box body 301 is divided into an independent heating chamber 3011 and a waste material chamber 3012. The waste material chamber 3012 is arranged between the two heating chambers 3011. An upper through hole 306 is opened at the top of the inner arc-shaped column 304. The upper through hole 306 is communicated with the waste material chamber 3012. When the upper through hole 306 is axially corresponding to the output end of the feed pipe 102, it provides waste material collection for the plasticizing end of the solid material. The solid material is cured at the plasticizing end through the air duct 104, and at the same time, part of the residue at the plasticizing end is classified into the waste material chamber 3012 for recycling.

[0052] Embodiment 4

[0053] Referring to Figures 7 to 8 , and based on the above Embodiment 1, this embodiment further provides a nozzle for a 3D printer. A nozzle 2 is installed below the base 1 through a connecting rod 11. A cover 10 is sleeved at the edge of the base 1 and the nozzle 2. An assembly hole 307 is provided at the bottom of the inner arc-shaped column 304, and a blower is installed in the assembly hole 307. In this structure, the nozzle 2 is a three-way structure, and its two input ports 202 are respectively vertically corresponding to the assembly gaps between the outer arc-shaped cover 106 and the inner arc-shaped column 304. The two input ports 202 communicate and converge at the output port 201. The blower blows the material at the input port 202 of the previous material to prevent the output port 201 from still having the previous material when another material enters. At the same time, only a small amount of the previous material between the output port 201 and the input port 202 is cleaned, which can greatly save the consumption of consumables.

[0054] The specific implementation process is as follows: During feeding, the solid material is introduced from the feed pipe 102, passes through the gap between the outer arc-shaped cover 106 and the inner arc-shaped column 304, is plasticized by the heater 6, and is discharged from the output port 201 through the input port 202.

[0055] When the material is switched, the cylinder 12 drives the lifting member 5 to move vertically. The outer arc-shaped cover 106 and the inner arc-shaped column 304 at the original falling position close the gap under the action of the spring group 4. The plasticized material at the position of the heater 6 is sealed at the assembly gap between the outer arc-shaped cover 106 and the inner arc-shaped column 304 for heat preservation. The solid material at the upper end is blown by the incoming air of the air duct 104, and the plasticized material doped therein is transported to the residue cavity 3012. Subsequently, the airbag 105 extends to block the feed pipe 102. The plasticized material in the lower nozzle 2 is discharged completely under the action of the fan. The solid material on the other side repeats the above feeding steps.

[0056] Many other changes and modifications can be made without departing from the spirit and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A nozzle for a 3D printer, characterized in that, Including: A base (1), an elevating member (5) is axially provided inside the base (1), two ends of the outside of the base (1) are respectively provided with sliding members (3) that are radially opposite and slide, and an inclined guide block structure is provided between the sliding member (3) and the elevating member (5). The inclined guide block structures on the two sliding members (3) are arranged in a staggered manner. By lifting and lowering the elevating member (5), the radial opening of any one of the sliding members (3) is controlled, and a spring group (4) for resetting the other sliding member (3) is provided between the sliding member (3) and the base (1); Two feed pipes (102) for conveying different materials are built in the base (1). The end of the feed pipe (102) is axially extended with an outer arc-shaped cover (106). The sliding member (3) includes an inner arc-shaped column (304) that acts radially on the inside of the outer arc-shaped cover (106). The outer arc-shaped cover (106) and the inner arc-shaped column (304) are connected to a heater (6). The middle of the inner arc-shaped column (304) is concave. When the material is switched, the outer arc-shaped cover (106) and the inner arc-shaped column (304) are radially abutted to enclose the unused plasticized material in the concave cavity; The sliding member (3) further includes a box body (301) provided at the rear end of the inner arc-shaped column (304). The box body (301) is divided into an independent heating cavity (3011) and a surplus material cavity (3012). The surplus material cavity (3012) is arranged between the two heating cavities (3011); The heating cavity (3011) is provided with an open hole (305) for the end of the outer arc-shaped cover (106) to insert. The heater (6) is arranged in the heating cavity (3011), and its output end abuts against the side of the outer arc-shaped cover (106); The control end of the heater (6) is electrically connected to a travel switch (7). The end of the outer arc-shaped cover (106) is provided with an inclined surface (107). The travel switch (7) abuts against the high end of the inclined surface (107), and when it corresponds to the low end of the inclined surface (107), it serves as a trigger signal for the heater (6) to be turned on; On the side of the feed pipe (102), a wind channel (104) and an assembly channel are respectively connected along different tangents. The three are connected at the same point. An inflation generating member (103) is installed in the assembly channel. The output end of the inflation generating member (103) is provided with an airbag (105) that can act on the entire cross-section of the feed pipe (102). When the airbag (105) is in the retracted state, the wind channel (104) is connected to the feed pipe (102); An upper through hole (306) is opened at the top of the inner arc-shaped column (304). The upper through hole (306) communicates with the surplus material cavity (3012), and when the upper through hole (306) is axially corresponding to the output end of the feed pipe (102), it provides surplus material collection for the plasticizing end of the solid material.

2. The nozzle for a 3D printer according to claim 1, wherein, An assembly hole (307) is provided at the bottom of the inner arc-shaped column (304), and a blower is installed in the assembly hole (307).

3. The nozzle for a 3D printer according to claim 2, wherein, The box body (301) is provided with a plurality of second trapezoidal blocks (302) at equal intervals along the length direction of the inner arc-shaped column (304); A cylinder (12) with an output end connected to the lifting member (5) is built in the base (1). A first trapezoidal block (501) that abuts against the second trapezoidal block (302) is provided on the side of the lifting member (5), and the inclined surfaces of the two abut against each other.

4. The nozzle for a 3D printer according to claim 3, characterized in that, A nozzle (2) is installed below the base (1) through a connecting rod (11), and a cover body (10) is sleeved at the edge between the base (1) and the nozzle (2).

5. The nozzle for a 3D printer according to claim 4, characterized in that, The nozzle (2) has a tee structure, and its two input ports (202) are vertically corresponding to the assembly gaps between the outer arc-shaped cover (106) and the inner arc-shaped column (304) respectively, and the two input ports (202) communicate and converge at the output port (201).

6. The nozzle for a 3D printer according to claim 1, characterized in that, A guide rail (101) is provided below the base (1), and a slider (303) that is slidably connected to the guide rail (101) is provided on the box body (301), and the spring group (4) is arranged between the slider (303) and the end of the guide rail (101).

Images