Spray head for 3D printer

Abstract

The invention discloses a spray head for a 3D printer, and relates to the technical field of 3D printer accessories, the spray head comprises a base, a lifting piece is axially arranged on the inner side of the base, sliding pieces are arranged at the two ends of the outer side of the base in a radial opposite and sliding mode, inclined guide block structures are arranged between the sliding pieces and the lifting piece, and the inclined guide block structures on the two sliding pieces are arranged in a staggered mode; two feeding pipes for conveying different materials are arranged in the base, the tail ends of the feeding pipes extend in the axial direction to be provided with outer arc-shaped covers, the sliding parts comprise inner arc-shaped columns acting on the inner sides of the outer arc-shaped covers in the radial direction, the outer arc-shaped covers and the inner arc-shaped columns are connected to the heater, and the middles of the inner arc-shaped columns are arranged to be in an inward concave shape. When the materials are switched, the plasticized materials at the action section of the heater are isolated and preserved by utilizing the concave cavity, so that the mixing rate during material switching is reduced, and meanwhile, the material switching loss is also reduced; control of different postures of the sliding pieces on the two sides can be achieved through the single lifting piece and the spring set.

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 equipped with two feed pipes for conveying different materials. The ends of the feed pipes are axially extended to form an outer arc cover. The sliding member includes an inner arc column radially acting on the inner side of the outer arc cover. The outer arc cover and the inner arc column are connected to the heater. The middle part of the inner arc column is set to be concave. When the material is switched, the outer arc cover and the inner arc column radially abut against each other to seal the unused plasticized material in the concave cavity.

[0008] Based on the above technical solution, by setting a combination of sliding parts and lifting parts, during the material switching process, an inner concave cavity can be used to effectively isolate and preserve the plasticized material in the heater action section. This design not only significantly reduces the mixing rate during material switching, but also effectively reduces the loss during material switching. Only through the configuration of a single lifting part and spring group, precise control of the different postures of the sliding parts on both sides 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 also includes a box body arranged at the rear end of the inner arc column, the box body is divided into a heating chamber and a residual material chamber that are independent of each other, and the residual material chamber is arranged between the two heating chambers; the heating chamber is provided with an open hole for inserting the end of the outer arc cover, the heater is arranged in the heating chamber, and its output end abuts against the side of the outer arc 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, and the travel switch abuts against the high end of the inclined surface, which serves as a trigger signal for turning on the heater when it corresponds to the low end of the inclined surface.

[0011] Based on the above technical solution, by introducing a travel switch, the linkage control of the heater and the sliding part posture is realized. When the inner arc column and the outer arc cover are in an open state to provide a falling channel for the material, the heater can start automatically; in addition, the surrounding surface of the inner arc column and the outer arc cover is a heat conductive plate structure, which enables the heater to perform thermoplastic treatment on solid materials through efficient heat conduction, which not only improves the convenience of operation, but also ensures the uniformity and efficiency of the material thermoplastic process.

[0012] Preferably, the side of the feed pipe is connected with an air duct and an assembly channel along different tangential directions, and the three are connected at the same point. An inflation generating component is installed in the assembly channel, and an air bag that can act on the entire cross-section of the feed pipe is provided at the output end of the inflation generating component. The air duct is connected with the feed pipe when the air bag is retracted.

[0013] Preferably, an upper through hole is opened on the top of the inner arc column, the upper through hole is connected to the residual material cavity, and the upper through hole provides residual material collection for the plasticization end of the solid material when it is axially corresponding to the output end of the feed pipe.

[0014] Based on the above technical scheme, by setting up air ducts, inflatable generating elements and airbags, the hot air isolation of the solid section of the material in the storage state can be achieved with the help of the expansion of the airbag. At the same time, the air duct is used to supply external airflow to achieve the elimination of hot air in the solid section of the material and the cleaning of the material at the junction of the solid section and the plastic section of the material.

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

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

[0017] Preferably, the nozzle is a three-way structure, and its two input ports correspond vertically to the assembly gaps between the outer arc-shaped cover and the inner arc-shaped column respectively, and the two input ports are connected and meet at the output port.

[0018] Based on the above technical solution, by setting a three-way structure nozzle and fan, a small amount of plasticized material at the end of the nozzle can be completely cleaned, and the material in the switching state can be divided into multiple ends for separate processing, further reducing material loss.

[0019] Preferably, the box body is provided with a plurality of second trapezoidal blocks equidistantly along the length direction of the inner arc column; the base is provided with a cylinder whose output end is connected to the lifting member, and the side of the lifting member is provided with a first trapezoidal block abutting against the second trapezoidal block, and the inclined surfaces of the two abut against each other.

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

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

[0022] 1. The present invention provides a sliding member and a lifting member. When switching materials, the concave cavity is used to isolate and preserve the plasticized material in the heater action section, thereby reducing the mixing rate during material switching and also reducing the material switching loss. A single lifting member and a spring assembly can be used to achieve different posture control of the sliding members on both sides, further simplifying the nozzle structure and improving the stability of material switching.

[0023] 2. The present invention has a simple structure. By setting a travel switch, the posture 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. The present invention provides an air duct, an inflatable generating element and an air bag, and the air bag can be expanded to isolate the hot air in the solid state of the material in the storage state. At the same time, the air duct is used to supply external airflow to eliminate the hot air in the solid state of the material, and to clean the material at the junction of the solid state and the plastic state;

[0025] 4. The present invention can achieve complete cleaning of a small amount of plasticized material at the end of the nozzle by providing a three-way structure nozzle and fan, and divide the material in the switching state into multiple ends for separate processing, thereby further reducing material loss. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0028] Figure 3 The present invention Figure 2 Schematic diagram of explosion structure Figure 1 ;

[0029] Figure 4 The present invention Figure 2 Schematic diagram of explosion structure Figure 2 ;

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

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

[0032] Figure 7 The structure diagram of the base and the sliding member in the present invention is shown in FIG. Figure 1 ;

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

[0034] Fig. 9 is a schematic diagram of the cross-sectional structure of the sliding member in the present invention;

[0035] Fig.10 The structure diagram of the base and the sliding member in the present invention is shown in FIG. Figure 2 .

[0036] Description of reference numerals:

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

[0038] 101. Guide rail, 102. Feed pipe, 103. Inflatable generating element, 104. Air duct, 105. Airbag, 106. Outer arc cover, 107. Oblique surface, 201. Output port, 202. Input port, 301. Box body, 302. Second trapezoidal block, 303. Slider, 304. Inner arc column, 305. Open hole, 306. Upper through hole, 307. Assembly hole, 3011. Heating chamber, 3012. Residual material chamber, 501. First trapezoidal block. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments:

[0040] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by 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 description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0042] The following is combined with Figure 1-10 This application is further described in detail.

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

[0044] Example 1

[0045] Reference Figures 1 to 10The present embodiment discloses a nozzle for a 3D printer, comprising a base 1, a lifting member 5 is axially arranged on the inner side of the base 1, sliding members 3 are radially opposite and slidably arranged at the two ends of the outer side of the base 1, an oblique guide block structure is arranged between the sliding member 3 and the lifting member 5, and the oblique guide block structures on the two sliding members 3 are arranged in a staggered shape, and the radial opening of any sliding member 3 is controlled by the lifting of the lifting member 5, and a spring group 4 for resetting the other sliding member 3 is arranged between the sliding member 3 and the base 1, and two feeding pipes 10 for conveying different materials are built in the base 1 2. An outer arc cover 106 is axially extended at the end of the feed pipe 102. The sliding member 3 includes an inner arc column 304 radially acting on the inner side of the outer arc cover 106. The outer arc cover 106 and the inner arc column 304 are connected to the heater 6. The middle part of the inner arc column 304 is set to be concave. In the material switching state, the outer arc cover 106 and the inner arc column 304 are radially abutted to seal the unused plasticized material in the concave cavity, thereby realizing the heat preservation of the heated plasticized material at the heater 6 for secondary utilization after the subsequent material switching.

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

[0047] Example 2

[0048] Reference Figures 7 to 9 , and based on Example 1, this embodiment further 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 column 304, the box body 301 has a built-in heating chamber 301, the heating chamber 3011 is provided with an open hole 305 for inserting the end of the outer arc cover 106, the heater 6 is arranged in the heating chamber 3011, and its output end abuts against the side of the outer arc cover 106, in this structure, the control end of the heater 6 is electrically connected to the travel switch 7, the end of the outer arc cover 106 is set as 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 turning on the heater 6, and the travel switch 7 is used to control the on state of the heater 6, when a vertical gap appears between the outer arc cover 106 and the inner arc 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] Example 3

[0050] Reference Figures 6 to 9, and based on the above embodiment, this embodiment also provides a nozzle for a 3D printer, the side of the feed pipe 102 is connected with an air duct 104 and an assembly channel along different tangential directions, the three are connected at the same point, an inflation generating component 103 is installed in the assembly channel, and the output end of the inflation generating component 103 is provided with an air bag 105 that can act on the entire cross-section of the feed pipe 102, and the air duct 104 is connected with the feed pipe 102 when the air bag 105 is retracted.

[0051] The box body 301 is divided into a heating chamber 3011 and a residual material chamber 3012 which are independent of each other. The residual material chamber 3012 is arranged between the two heating chambers 3011. An upper through hole 306 is opened on the top of the inner arc column 304. The upper through hole 306 is connected to the residual material chamber 3012. When the upper through hole 306 is axially corresponding to the output end of the feed pipe 102, residual material collection is provided for the plasticized end of the solid material. The plasticized end of the solid material is solidified through the air duct 104, and part of the residue at the plasticized end is collected in the residual material chamber 3012 for recovery.

[0052] Example 4

[0053] Reference Figures 7 and 8 , and based on the above-mentioned embodiment 1, this embodiment further provides a nozzle for a 3D printer, wherein a nozzle 2 is installed below the base 1 through a connecting rod 11, a cover body 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 column 304, and a fan is installed in the assembly hole 307. In this structure, the nozzle 2 is a three-way structure, and its two input ports 202 respectively correspond vertically to the assembly gaps between the outer arc cover 106 and the inner arc column 304, and the two input ports 202 are connected and intersected at the output port 201. The fan is used to blow the material through the input port 202 of the previous material to prevent the previous material from remaining at the output port 201 when another material enters, and the previous material that is cleaned is only a small amount of material between the output port 201 and the input port 202, which can greatly save the loss of consumables.

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

[0055] When the materials are switched, the cylinder 12 drives the lifting member 5 to move vertically, and the outer arc cover 106 and the inner arc column 304 at the original falling position close the gap under the action of the spring group 4, and the plasticized material at the position of the heater 6 is sealed in the assembly gap between the outer arc cover 106 and the inner arc column 304 for insulation; the solid material at the upper end is swept by the air inlet of the air duct 104, and the mixed plasticized material is transferred to the residual material chamber 3012, and then the air bag 105 is extended to block the feed pipe 102; the plasticized material in the lower nozzle 2 is discharged cleanly under the action of the fan; the solid material on the other side repeats the above-mentioned unloading steps.

[0056] Many other changes and modifications may be made without departing from the concept 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: include: A base (1), wherein a lifting member (5) is axially provided on the inner side of the base (1), and sliding members (3) are respectively provided at two ends of the outer side of the base (1) in a radially opposite and slidable manner, and an inclined guide block structure is provided between the sliding member (3) and the lifting member (5), and the inclined guide block structures on the two sliding members (3) are arranged in a staggered manner, and the radial opening of any one of the sliding members (3) is controlled by lifting and lowering the lifting member (5), and a spring group (4) for resetting the other sliding member (3) is provided between the sliding member (3) and the base (1); The base (1) is provided with two feed pipes (102) for conveying different materials, and an outer arc cover (106) is axially extended from the end of the feed pipe (102). The sliding member (3) includes an inner arc column (304) which acts radially on the inner side of the outer arc cover (106). The outer arc cover (106) and the inner arc column (304) are connected to the heater (6). The middle part of the inner arc column (304) is set to be concave. In the material switching state, the outer arc cover (106) and the inner arc column (304) are radially abutted to seal the unused plasticized material in the concave cavity.

2. A nozzle for a 3D printer according to claim 1, characterized in that: The sliding member (3) further comprises a box body (301) arranged at the rear end of the inner arc column (304), the box body (301) being divided into a heating chamber (3011) and a residual material chamber (3012) which are independent of each other, and the residual material chamber (3012) is arranged between the two heating chambers (3011); The heating chamber (3011) is provided with an open hole (305) for inserting the end of the outer arc-shaped cover (106); the heater (6) is arranged in the heating chamber (3011), and its output end abuts against the side of the outer arc-shaped cover (106).

3. A nozzle for a 3D printer according to claim 2, characterized in that: 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 as an inclined surface (107); the travel switch (7) abuts against the high end of the inclined surface (107) and serves as a trigger signal for turning on the heater (6) when it corresponds to the low end of the inclined surface (107).

4. A nozzle for a 3D printer according to claim 3, characterized in that: The side of the feed pipe (102) is connected with an air duct (104) and an assembly channel along different tangential directions respectively, and the three are connected at the same point. An inflation generating element (103) is installed in the assembly channel, and an air bag (105) that can act on the entire cross-section of the feed pipe (102) is provided at the output end of the inflation generating element (103). When the air bag (105) is retracted, the air duct (104) is connected with the feed pipe (102).

5. A nozzle for a 3D printer according to claim 4, characterized in that: An upper through hole (306) is provided at the top of the inner arc column (304), and the upper through hole (306) is connected to the residual material chamber (3012). When the upper through hole (306) is in axial correspondence with the output end of the feed pipe (102), residual material collection is provided for the plasticized end of the solid material.

6. A nozzle for a 3D printer according to claim 5, characterized in that: The bottom of the inner arc column (304) is provided with an assembly hole (307), and a fan is installed in the assembly hole (307).

7. A nozzle for a 3D printer according to claim 5, characterized in that: 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 column (304); The base (1) is internally provided with a cylinder (12) whose output end is connected to the lifting member (5); the side of the lifting member (5) is provided with a first trapezoidal block (501) which abuts against the second trapezoidal block (302), and the inclined surfaces of the two abut against each other.

8. A nozzle for a 3D printer according to claim 7, characterized in that: A nozzle (2) is installed below the base (1) via a connecting rod (11), and a cover body (10) is sleeved on the edges of the base (1) and the nozzle (2).

9. A nozzle for a 3D printer according to claim 8, characterized in that: The nozzle (2) is a three-way structure, and its two input ports (202) respectively correspond vertically to the assembly gap between the outer arc-shaped cover (106) and the inner arc-shaped column (304), and the two input ports (202) are connected and meet at the output port (201).

10. A nozzle for a 3D printer according to claim 2, characterized in that: A guide rail (101) is provided below the base (1), a slider (303) 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).

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