A printing mechanism with multiple hot melt nozzles

Abstract

The application provides a printing mechanism with multiple hot-melt nozzles, which is provided with a fixing seat, a first motor is arranged in the fixing seat, the output of the first motor is matched with a rotating seat and drives the rotating seat to rotate, a printing head and a feeding mechanism are fixedly connected to the rotating seat at equal angles below and on the side wall of the rotating seat, the printing head comprises a cylinder, an electric heating cylinder is vertically arranged in the cylinder, a nozzle is fixedly connected to the lower end of the cylinder, a movable column is arranged in the electric heating cylinder, a taper hole with a small upper part and a large lower part is arranged in the middle of the movable column, a chamber is arranged on the upper part of the side wall of the cylinder, and a semiconductor refrigerating sheet is arranged in the chamber, the feeding mechanism comprises a bottom plate, two parallel rotating shafts are arranged on the bottom plate, rotating wheels are arranged on the rotating shafts, grooves are arranged on the side wall of the rotating wheels, and elastic rings and feeding wheels are arranged in the grooves from inside to outside by buckling. The application satisfies the printing of multiple materials through multiple printing heads, and the feeding mechanism is suitable for the conveying of multiple materials with different diameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a printing mechanism with multiple hot-melt nozzles. BACKGROUND

[0002] 3D printing (3DP) is also called additive manufacturing technology, which is a technology for manufacturing solid parts by layer-by-layer material accumulation according to three-dimensional CAD data.

[0003] The existing 3D printed parts are basically printed using a single (composite) material. The materials of different parts of the printed part are consistent, that is, the performance is also consistent. However, after the printed part is installed in the working position, different parts of the printed part need different performance. Therefore, the selection of printing materials is relatively strict, and relatively meet the requirements of multiple requirements, and the cost of the material is also not low. Or further processing on the printed part, so as to obtain the required performance at the specific part, which also increases the production cost. SUMMARY

[0004] In order to solve the above problems, the present application discloses a printing mechanism with multiple hot-melt nozzles, which comprises a fixed seat, the lower end of the fixed seat is rotatably connected with a rotating seat, the lower end edge of the rotating seat is fixedly connected with a plurality of printing heads at equal angles, and the upper side of each printing head is provided with a feeding mechanism. Multiple printing heads are provided, each printing head can independently set different printing materials, meet the same printing part, and meet the demand of printing multiple materials at the same time. The setting of the rotating seat is convenient for switching the printing head.

[0005] The printing head comprises a cylinder, an electric heating cylinder is vertically arranged in the inside of the cylinder, a plurality of coils are wound around the side wall of the electric heating cylinder, a nozzle is fixedly connected to the lower end of the cylinder, an inlet hole is arranged at the upper end of the cylinder, and the inlet hole is located above the preset through hole of the nozzle. After the printing material enters the inside of the cylinder from the inlet, the coils are electrified to generate heat, and the printing material is melted and sent out from the nozzle.

[0006] The inside of the electric heating cylinder is provided with a movable column, the middle part of the movable column is provided with a tapered hole with a small upper part and a large lower part, the upper end of the movable column is fixedly connected with a spring, the upper end of the spring abuts against the upper part of the cylinder, the side wall of the upper part of the cylinder is provided with a cavity, and a semiconductor refrigerating sheet is arranged in the cavity. After the printing material passes downward from the upper end of the movable column, it starts to melt. If it is necessary to switch the printing head, the coils located at the movable column are de-energized at this time, and the semiconductor refrigerating sheet is energized at this time. The side of the semiconductor refrigerating sheet facing the movable column is refrigerated. At this time, the printing material in the inside of the movable column is solidified. Then the feeding mechanism acts to pull up the printing material. At this time, the movable column moves upward and generates negative pressure below. At this time, the material at the nozzle is sucked back into the inside of the cylinder, so as to avoid the problem of yarn drawing at the current nozzle in the switching process, and to affect the printing quality.

[0007] The feed mechanism includes a base plate with two parallel rotating shafts mounted thereon, each equipped with a rotating wheel. The sidewalls of the rotating wheel are provided with grooves, and elastic rings and feed wheels are positioned in the grooves from the inside out. A second motor is fixedly connected to the back of the base plate, and the output end of the second motor is fixedly connected to one of the rotating shafts. When the feed mechanism is in operation, the printing material is clamped by the feed wheels, and the elastic rings are deformed by force. The reaction force ensures stable clamping. Furthermore, the elastic rings can transport printing materials of various diameters.

[0008] Preferably, a transfer circuit board is disposed in the upper chamber of the cylinder, and a cover is provided on the front of the chamber. Several heat sinks are equidistantly disposed on the upper sidewalls of the cylinder, and a thermal insulation sleeve is provided on the lower portion of the cylinder. The cover is provided with wiring holes, and the semiconductor cooling fins are electrically connected to the transfer circuit board. Several contacts are provided on the other side of the transfer circuit board, extending through the cylinder and contacting electrodes pre-set on the sidewalls of the electric heating tube. The center of the chamber is filled with silicone rubber.

[0009] Preferably, a front plate with a "J"-shaped top view is riveted to the front of the base plate, with guide rods disposed vertically and horizontally between the front plate and the base plate. The guide rods provide front and left / right position limits during the printing material conveying process, ensuring that the printing material can be smoothly clamped by the feed wheel.

[0010] Preferably, a lower material guide mechanism is fixedly connected to the side wall of the rotating base and is located directly above the corresponding feed mechanism. The lower material guide mechanism includes a square box, a first guide ring being rotatably connected to the interior of the box, and a front end of the first guide ring extending from the box. Two U-shaped elastic members are disposed within the box, and the first guide ring is located between the two U-shaped elastic members. A front stopper is fixedly connected to the front end of the box. Printing material passes through the first guide ring, ensuring that printing material can only enter from directly above the feed mechanism. The provision of the two U-shaped elastic members also ensures that the first guide ring can rotate left and right, preventing excessive stress on the printing material.

[0011] Preferably, an upper material guide mechanism is fixedly connected to the sidewall of the fixed seat. The upper material guide mechanism includes a fixed sleeve, a support ring is sleeved on the fixed sleeve, and a plurality of second guide rings are fixedly connected to the support ring at equal angles. A threaded sleeve is threadedly connected to the upper portion of the fixed sleeve. The second guide rings provide preliminary positioning for the printing material. Because the rotating seat and the fixed seat can rotate relative to each other, the lower and upper material guide mechanisms are provided.

[0012] Preferably, the inside of the fixed seat is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a shaft coupling, the lower part of the shaft coupling is a spline, the upper end of the rotating seat is fixedly connected with a first cover plate, the middle part of the first cover plate is provided with a matching hole and matches the spline.

[0013] Preferably, the shaft coupling is fixedly connected with a slip ring. The use of the slip ring ensures power supply and communication below.

[0014] Preferably, the upper part of the rotating seat is sleeved with two plane bearings, a connecting ring is arranged between the two plane bearings, the lower part of the fixed seat is sleeved on the outside of the connecting ring, and the lower part of the fixed seat is inserted with a screw, and the screw is threadedly connected with the connecting ring. In assembly, the edge of the first cover plate is buckled above the plane bearing, the connecting ring is between the two plane bearings, and the connecting ring is fixedly connected with the fixed seat, so that the rotation between the fixed seat and the rotating seat is stable.

[0015] Preferably, the upper end of the rotating seat and the fixed seat is provided with an electrical chamber, and the upper end of the fixed seat is fixedly connected with a second cover plate. The electrical chamber is used for accommodating a control module.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. Multiple print heads are arranged, each print head is equipped with different printing materials, different printing materials can be used at different positions according to the application requirements of the workpiece, so as to reduce the cost of printing materials and the cost of subsequent reprocessing as a whole.

[0018] 2. The semiconductor refrigerating sheet and the electric heating cylinder are arranged, the inside of the electric heating cylinder is provided with a movable column, the inside of the movable column is a taper hole which is small at the top and large at the bottom, when the print head needs to be switched, the coil at the movable column is powered off, and the semiconductor refrigerating sheet is powered on, the refrigerating side faces the movable column, at this time, the printing material in the movable column is solidified, then the feeding mechanism acts to pull up the printing material, at this time, the movable column moves upward and generates negative pressure below, at this time, the material at the nozzle is sucked back into the inside of the cylinder, so as to avoid the problem of yarn drawing of the current nozzle in the switching process, and affect the printing quality.

[0019] 3. The feeding mechanism comprises a rotating wheel, an elastic ring and a feeding wheel, the printing material is clamped by the feeding wheel, the elastic ring is deformed under force, and the reaction force ensures the stability of clamping, and due to the arrangement of the elastic ring, various diameters of printing materials can be conveyed, the tight clamping meets the demand of high-precision feeding, and the lifting action required to solve the yarn drawing problem. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1A perspective view of the present application;

[0021] Figure 2 An exploded view of the main structure of the present application;

[0022] Figure 3 A schematic view of the structure at the coupling of the present application;

[0023] Figure 4 A perspective view of Figure 2 An enlarged view at A;

[0024] Figure 5 A sectional view of the print head of the present application;

[0025] Figure 6 An exploded view of the print head of the present application;

[0026] Figure 7 A sectional view of the electric heating cylinder of the present application;

[0027] Figure 8 An exploded view of the feeding mechanism of the present application;

[0028] Figure 9 An exploded view of the lower material guiding mechanism of the present application;

[0029] Figure 10 An exploded view of the upper material guiding mechanism of the present application.

[0030] List of reference signs:

[0031] 1, print head; 2, feeding mechanism; 3, lower material guiding mechanism; 4, rotating seat; 5, fixed seat; 6, upper material guiding mechanism; 7, coupling; 8, first cover plate; 9, first motor; 10, second cover plate; 11, spline; 12, slip ring; 13, plane bearing; 14, connecting ring;

[0032] 101, nozzle; 102, heat preservation sleeve; 103, cylinder; 104, movable column; 105, heat dissipation fin; 106, spring; 107, cover; 108, semiconductor refrigeration sheet; 109, adapter circuit board; 1010, electric heating cylinder; 1011, coil; 201, front plate; 202, guide rod; 203, rotating wheel; 204, elastic ring; 205, feeding wheel; 206, rotating shaft; 207, bottom plate; 208, second motor; 301, first guide ring; 302, front stopper; 303, square box; 304, U-shaped elastic member; 601, fixed sleeve; 602, second guide ring; 603, supporting ring; 604, threaded sleeve. DETAILED DESCRIPTION

[0033] The present application will be further clarified by a consideration of the following detailed description and drawings. It is to be understood that the following detailed description is intended to be purely exemplary of the application and is not intended to limit the broad aspects of the application to the precise construction described. It is to be further understood that the use of relational terms such as "front", "rear", "left", "right", "up" and "down", or the like, are used only for convenience and are not to be construed as limiting the application to any specific orientation.

[0034] Figures 1 to 10 As shown, a multi-hot-melt nozzle printing mechanism includes a fixed seat 5, the lower part of the fixed seat 5 is a cylindrical pipe, the upper end is a rounded rectangular plate, and the four corners of the rectangular plate are provided with mounting holes, the lower end of the fixed seat 5 is rotatably connected with a rotating seat 4, the rotating seat 4 is also cylindrical, and the lower end edge of the rotating seat 4 is fixedly connected with a plurality of printing heads 1 at equal angles, the plurality of printing heads 1 can realize that a single printing mechanism can print multiple materials, and at the same time on a single workpiece, different parts realize the demand of different printing materials, and the upper side of each printing head 1 is provided with a feeding mechanism 2, and the feeding mechanism 2 is used to send the printing material into the printing head 1.

[0035] The printing head 1 includes a cylindrical body 103, the upper end of the cylindrical body 103 is a connecting plate, the connecting plate is provided with mounting holes, which is beneficial to fixedly connect with the lower end of the rotating seat 4, and a vertical electric heating cylinder 1010 is arranged in the inside of the cylindrical body 103, the electric heating cylinder 1010 is sleeved in the inside of the cylindrical body 103, which is beneficial to disassemble, a plurality of coils 1011 are wound around the side wall of the electric heating cylinder 1010, it is noted that each coil is independently controlled, which is used to realize that different temperatures are set at different heights of the cylindrical body 103, the lower end of the cylindrical body 103 is fixedly connected with a nozzle 101, the nozzle 101 is used to send the melted printing material out, the upper end of the cylindrical body 103 is provided with a feeding hole, and the feeding hole is located above the preset through hole of the nozzle 101, the printing material enters the inside of the cylindrical body 103 from the feeding hole, and the upper end edge of the feeding hole is provided with a rounded corner, in addition, the printing material is pushed into the inside of the cylindrical body 103 by the feeding mechanism 2.

[0036] The inside of the electric heating cylinder 1010 is provided with a movable column 104, the movable column 104 is located in the middle part of the electric heating cylinder 1010, the middle part of the movable column 104 is provided with a taper hole which is small at the upper end and large at the lower end, the upper end of the movable column 104 is fixedly connected with a spring 106, and the upper end of the spring 106 abuts against the upper part of the cylindrical body 103, under the suspension of the spring 106, the position of the movable column 104 is kept, and at the same time, the pressure change of the printing material melted can be balanced, the upper part of the cylindrical body 103 is provided with a chamber, and a semiconductor refrigeration sheet 108 is arranged in the chamber, the side of the semiconductor refrigeration sheet 108 which is refrigerated faces the movable column 104, and when electrified, the printing material where the movable column 104 is located is cooled and solidified.

[0037] Further, when the print head 1 switches, the coil 1011 at the movable column 104 is powered off, and then the semiconductor refrigeration piece 108 is powered on, the printing material where the movable column 104 is located is cooled and solidified, at this time, the feeding mechanism 2 lifts the printing material, and the solidified printing material is also lifted under the conical hole structure, so that the movable column 104 is lifted, so that the negative pressure is generated below, the material at the nozzle 101 is sucked back, which reduces the problem of filament of the printing material and reduces the quality of the printed part.

[0038] The feeding mechanism 2 comprises a bottom plate 207, the bottom plate 207 is fixedly connected to the rotating seat 4 by screws, and two parallel rotating shafts 206 are arranged on the bottom plate 207. The rotating shaft 206 is provided with a rotating wheel 203, the side wall of the rotating wheel 203 is provided with a groove, and the elastic ring 204 and the feeding wheel 205 are buckled from inside to outside in the groove. The printing material passes between the feeding wheels 205, further, the side wall of the feeding wheel 205 is provided with an arc-shaped groove, and the arc-shaped groove is provided with a convex pattern, which plays a role in preventing slipping and ensuring that the printing material is tightly held. After the printing material passes between the two feeding wheels 205, the force generated by the deformation of the elastic ring 204 ensures that the feeding wheel 205 is clamped stably, and the elastic ring 204 can be used for conveying printing materials with different diameters. The back surface of the bottom plate 207 is fixedly connected with the second motor 208, and the output end of the second motor 208 is fixedly connected with one of the rotating shafts 206. When the second motor 208 is started, the feeding wheel 205 is driven to rotate, thereby realizing the conveying of the material. Since the clamping is tight, the conveying amount and the printing speed can be determined.

[0039] The upper chamber of the cylinder 103 is provided with a switching line board 109, the back surface of the switching line board 109 is provided with a plurality of contacts, and the upper side wall of the electric heating cylinder 1010 is provided with an electrode. The electrode and the coil 1011 are electrically connected. When the electric heating cylinder 1010 is assembled in the inside of the cylinder 103, the contacts and the electrode are in contact, the coil is powered, and the semiconductor refrigeration piece 108 is also electrically connected with the switching line board 109. The refrigeration side of the semiconductor refrigeration piece 108 is attached to the switching line board 109, and the front surface of the chamber is provided with a cover 107. The cover 107 seals the chamber, and the inside of the chamber is filled with silicone rubber to block the gap. The upper side wall of the cylinder 103 is equidistantly provided with a plurality of heat dissipation fins 105. The heat dissipation fins 105 improve the heat dissipation capacity of the upper part of the cylinder 103. The lower part of the cylinder 103 is sleeved with a heat preservation sleeve 102, and the use of the heat preservation sleeve 102 reduces the heat dissipation speed of the cylinder 103.

[0040] The front surface of the bottom plate 207 is riveted with a front plate 201 in the shape of "several" in plan view. The bottom plate 207 and the front plate 201 are both sheet metal parts with small thickness, and the riveting mode is more conducive to the connection of the two. The front plate 201 and the bottom plate 207 are longitudinally and transversely provided with guide rods 202. Specifically, the guide rods 202 are provided with three guide rods, two of which are located above the two sides of the feeding wheel 205, and the other is located above the front end of the feeding wheel 205, realizing the front and left and right guidance of the printing material.

[0041] The side wall of the rotating seat 4 is fixedly connected with the lower material guiding mechanism 3, and the lower material guiding mechanism 3 is located directly above the feeding mechanism 2. The lower material guiding mechanism 3 includes a square box 303, the inside of the square box 303 is rotatably connected with a first guide ring 301, and the front end of the first guide ring 301 extends out of the square box 303. The front end of the first guide ring 301 is a circular ring, and the printing material passes through the circular ring. The inside of the square box 303 is provided with two U-shaped elastic members 304, and the first guide ring 301 is located between the two U-shaped elastic members 304, that is, under the action of the two U-shaped elastic members 304, the first guide ring 301 is centrally arranged. At the same time, under the limitation of the U-shaped sleeve, the first guide ring 301 can swing left and right. The front end of the square box 303 is fixedly connected with a front stop piece 302, which blocks the square box 303. At the same time, a convex rod is arranged on the front stop piece 302, which extends into the inside of the square box 303. In addition, a fixed pin is arranged vertically through the convex rod and the square box 303.

[0042] The side wall of the fixed seat 5 is fixedly connected with the upper material guiding mechanism 6. The upper material guiding mechanism 6 includes a fixed sleeve 601, one side of which is L-shaped in cross section, used to support the structure above. At the same time, a plurality of screws are inserted through the fixed sleeve 601 to fixedly connect the fixed sleeve 601 to the fixed seat 5. The fixed sleeve 601 is sleeved with a supporting ring 603, and a plurality of second guide rings 602 are fixedly connected to the supporting ring 603 at equal angles. The second guide ring 602 has the same structure as the first guide ring 301. The upper part of the fixed sleeve 601 is threadedly connected with a threaded sleeve 604, which limits the supporting ring 603 upward and downward. According to the use scene, the threaded sleeve 604 can be loosened to switch the supporting ring 603 between rotation and fixation.

[0043] Due to the arrangement of the fixed seat 5 and the rotating seat 4, the upper material guiding mechanism 6 and the lower material guiding mechanism 3 are arranged to meet the use requirements of the printing mechanism.

[0044] The first motor 9 is fixedly connected in the inside of the fixed seat 5, and the first motor 9 is fixedly connected to the preset partition plate in the inside of the fixed seat 5 through a screw, the output end of the first motor 9 is fixedly connected with the shaft coupling 7, the lower part of the shaft coupling 7 is a spline 11, the upper end of the rotating seat 4 is fixedly connected with the first cover plate 8, the middle part of the first cover plate 8 is provided with a matching hole, and the spline 11 is matched, that is, the spline 11 is matched in a plug-in manner, the first motor 9 is started, so as to drive the rotating seat 4 to rotate.

[0045] The shaft coupling 7 is fixedly connected with the slip ring 12. The slip ring 12 is used to provide power supply and communication below, the shaft coupling 7 is hollow, the line on one side of the slip ring 12 passes through the shaft coupling 7 and enters the rotating seat 4 below, and a wire groove is arranged on the inner wall of the fixed seat 5, and the cable passes through the wire groove and is electrically connected with the shaft coupling 7.

[0046] The upper part of the rotating seat 4 is sleeved with two plane bearings 13, and a connecting ring 14 is arranged between the two plane bearings 13, that is, the connecting ring 14 is arbitrarily rotated between the two plane bearings 13, the lower part of the fixed seat 5 is sleeved on the outer side of the connecting ring 14, and the lower part of the fixed seat 5 is inserted with a screw, the screw is threadedly matched with the connecting ring 14, further, when the first cover plate 8 is fixed, the edge of the first cover plate 8 is buckled to the plane bearing 13, so as to limit the up-down position, and after the connecting ring 14 is fixedly connected with the fixed seat 5, there is no up-down movement gap between the rotating seat 4 and the fixed seat 5.

[0047] The upper ends of the rotating seat 4 and the fixed seat 5 are provided with an electrical chamber, and a power supply circuit and a driving motor are arranged in the electrical chamber, for example, the electrical chamber on the fixed seat 5 is provided with a communication node, which is used for communication with an upper computer and a control circuit of the first motor 9, and the rotating seat 4 is provided with a second motor 208, a semiconductor refrigeration sheet 108 and a control circuit of a coil 1011, the upper end of the fixed seat 5 is fixedly connected with a second cover plate 10, the second cover plate 10 seals the electrical chamber, and the edge of the second cover plate 10 is provided with a connecting structure, and the side wall of the fixed seat 5 is provided with a screw and is threadedly connected with the connecting structure.

[0048] The technical means disclosed in the scheme of the application is not limited to the technical means disclosed in the above-mentioned embodiments, and also includes the technical scheme composed of any combination of the above technical features.

Claims

1. A printing mechanism with multiple hot melt nozzles, characterized in that: It comprises a fixed seat (5), the lower end of the fixed seat (5) is rotatably connected to a rotating seat (4), the lower end edge of the rotating seat (4) is fixedly connected to a plurality of print heads (1) at equal angles, and a feeding mechanism (2) is provided directly above each of the print heads (1); The print head (1) comprises a cylinder (103), an electric heating cylinder (1010) is vertically arranged inside the cylinder (103), a plurality of coils (1011) are wound around the side wall of the electric heating cylinder (1010), a nozzle (101) is fixedly connected to the lower end of the cylinder (103), and a feed hole is provided at the upper end of the cylinder (103), and the feed hole is located directly above a preset through hole on the nozzle (101); A movable column (104) is provided inside the electric heating tube (1010), and a tapered hole with a smaller upper portion and a larger lower portion is provided in the middle of the movable column (104); a spring (106) is fixedly connected to the upper end of the movable column (104), and the upper end of the spring (106) abuts against the upper portion of the cylinder (103); a chamber is provided on the upper side wall of the cylinder (103), and a semiconductor cooling plate (108) is provided in the chamber; The feeding mechanism (2) comprises a base plate (207), two rotating shafts (206) arranged side by side on the base plate (207), a rotating wheel (203) arranged on the rotating shaft (206), a groove provided on the side wall of the rotating wheel (203), and an elastic ring (204) and a feeding wheel (205) fastened from the inside to the outside in the groove, a second motor (208) fixedly connected to the back of the base plate (207), and an output end of the second motor (208) fixedly connected to one of the rotating shafts (206).

2. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: A transfer circuit board (109) is provided in the upper chamber of the cylinder (103), and a cover (107) is provided on the front of the chamber. A plurality of heat sinks (105) are equidistantly provided on the upper side wall of the cylinder (103), and a heat preservation sleeve (102) is sleeved on the lower part of the cylinder (103).

3. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: A front plate (201) having a top view profile in the shape of a "J" is riveted onto the front of the bottom plate (207), and guide rods (202) are arranged vertically and horizontally between the front plate (201) and the bottom plate (207).

4. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The side wall of the rotating seat (4) is fixedly connected to a lower material guiding mechanism (3), and the lower material guiding mechanism (3) is located directly above the corresponding feeding mechanism (2). The lower material guiding mechanism (3) comprises a square box (303), the interior of the square box (303) is rotatably connected to a first guide ring (301), and the front end of the first guide ring (301) extends from the square box (303). Two U-shaped elastic members (304) are provided inside the square box (303), and the first guide ring (301) is located between the two U-shaped elastic members (304). The front end of the square box (303) is fixedly connected to a front stopper (302).

5. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: An upper material guide mechanism (6) is fixedly connected to the side wall of the fixing seat (5), and the upper material guide mechanism (6) comprises a fixing sleeve (601), a support ring (603) is sleeved on the fixing sleeve (601), a plurality of second guide rings (602) are fixedly connected at equal angles to the support ring (603), and a threaded sleeve (604) is threadedly connected to the upper portion of the fixing sleeve (601).

6. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The interior of the fixed seat (5) is fixedly connected to a first motor (9), an output end of the first motor (9) is fixedly connected to a coupling (7), a lower portion of the coupling (7) is a spline (11), and an upper end of the rotating seat (4) is fixedly connected to a first cover plate (8), a middle portion of the first cover plate (8) is provided with a matching hole, and the hole matches the spline (11).

7. The printing mechanism with multiple hot melt nozzles according to claim 6, characterized in that: A slip ring (12) is fixedly connected to the coupling (7).

8. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The upper portion of the rotating seat (4) is sleeved with two plane bearings (13), and a connecting ring (14) is provided between the two plane bearings (13). The lower portion of the fixed seat (5) is sleeved on the outer side of the connecting ring (14), and a screw is inserted through the lower portion of the fixed seat (5), and the screw and the connecting ring (14) are threadedly engaged.

9. The printing mechanism with multiple hot melt nozzles according to claim 1, characterized in that: The upper ends of the rotating seat (4) and the fixed seat (5) are both provided with electrical chambers, and the upper end of the fixed seat (5) is fixedly connected to a second cover plate (10).

Images