Heating assembly of printing head

Abstract

The invention discloses a heating assembly of a printing head, the heating assembly comprises a support, a feeding heating cavity assembly, a spherical heating cavity assembly and a discharging pipe assembly, the feeding heating cavity assembly, the spherical heating cavity assembly and the discharging pipe assembly are arranged on the support and distributed in an upper-middle-lower mode, and the spherical heating cavity assembly arranged in the middle can form a spherical heating cavity between the feeding end and the discharging end of the printing head; the spherical heating cavity assembly is composed of a sphere, an outer cover shell arranged on the periphery of the sphere, a first annular heating pipe and a second annular heating pipe, wherein the first annular heating pipe and the second annular heating pipe are arranged on the opposite faces of the sphere and the outer cover shell respectively, and a heating cavity is formed between the sphere and the outer cover shell. By means of the position and structural characteristics of the spherical heating cavity assembly, the spherical heating cavity can be formed between the feeding end and the discharging end of the printing head, and heating structures are arranged inside and outside the spherical heating cavity, so that the consumable heating effect is improved, and meanwhile it is guaranteed that consumables are evenly heated.

Description

Technical Field

[0001] The invention relates to the technical field of printing, in particular to a heating component of a printing head. Background Art

[0002] FDM (Fused Deposition Modeling) printing technology has the advantages of simple operation, flexible customization, and fast molding speed, and has become the most widely used 3D printing technology. In the process of extruding materials, the industrial-grade FDM print head must first ensure that the material is completely melted, and the existing print head heating structure mostly uses simple heating wires and heating rods. This method has poor heating effect and incomplete heating of the wire. Second, the temperature is lost quickly. Therefore, a heating component of the print head is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a heating component for a print head. Through the position and structural characteristics of the spherical heating cavity component, a spherical heating cavity can be formed between the feed end and the discharge end of the print head, which has a good thermal insulation effect. The spherical heating cavity is provided with heating structures inside and outside, so as to improve the heating effect of the consumables and ensure that the consumables are evenly heated.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heating assembly of a print head, comprising: a bracket, a feed heating chamber assembly, a spherical heating chamber assembly and a discharge pipe assembly arranged on the bracket and distributed in the upper, middle and lower parts, wherein the spherical heating chamber assembly placed in the middle can form a spherical heating chamber between the feed end and the discharge end of the print head; the spherical heating chamber assembly is composed of a sphere, an outer cover shell placed on the outer periphery of the sphere, and a first annular heating tube and a second annular heating tube, wherein the first annular heating tube and the second annular heating tube are respectively arranged on the opposite surfaces of the sphere and the outer cover shell so that a heating chamber is formed between the sphere and the outer cover shell for uniformly heating and melting the wire.

[0005] Preferably, the outer cover shell includes an upper cover shell fixed to the middle part of the bracket, and a lower cover component adapted to engage with the upper cover shell, the lower cover component includes an electric telescopic rod fixed to the bottom of the bracket, and a mounting frame fixed to the telescopic end of the electric telescopic rod, and the mounting frame is connected with two pairs of rotatable mounting rings through mounting columns arranged at opposite ends thereof, and each pair of mounting rings is provided with two, two mounting rings close to the inner side are fixed to one of the lower cover shells, and two mounting rings close to the outer side are fixed to the other lower cover shell; it also includes an engagement drive assembly, when the electric telescopic rod is extended, the engagement drive assembly can realize the process of the two lower cover shells being brought together and moved up to dock with the upper cover shell, and when the electric telescopic rod is retracted, the two lower cover shells are separated from the upper cover shell and the expansion process after separation is realized.

[0006] Preferably, the meshing drive assembly includes a support rod, and long racks respectively fixed at both ends of the support rod; it also includes arc-shaped racks respectively arranged on the outer walls of the two lower cover shells, wherein the arc-shaped racks mesh with their corresponding long racks; the connecting block of the support rod close to the end of the bracket is slidably installed in the inside of the slide groove opened on the side wall of the bracket and is longitudinally connected to the top of the slide groove by a first spring.

[0007] Preferably, the discharge pipe assembly includes a branch pipe fixed at the bottom of each lower cover shell and connected to the lower cover shell, and a hose arranged at the bottom ends of the two branch pipes; it also includes a connecting pipe connected to the bottom end of the hose, and the support rod is fixed on the connecting pipe.

[0008] Preferably, the feed heating chamber assembly is composed of a stirring chamber assembly and a spiral conveying chamber assembly; wherein the spiral conveying chamber assembly is placed between the stirring chamber assembly and the spherical heating chamber assembly and is used to connect the two; the stirring chamber assembly includes a shell fixed on the upper part of the bracket, and a feed chamber rotatably connected to the top center of the shell, and the feed chamber is composed of a conical cavity and a transmission cavity distributed inside and outside the shell; the conical cavity is a hollow structure, and a transmission rod is fixed at the bottom of the conical cavity; it also includes a column annularly fixed on the upper wall of the transmission rod, and a heating coil fixed at the outer end of each column, two second springs and a steel ball are arranged inside the column, and the steel ball is arranged at the opposite ends of the two second springs, and the opposite ends of the two second springs are connected to the opposite surfaces of the heating coil.

[0009] Preferably, a cross is fixed to the lower wall of the transmission rod, and a scraper annularly fixed to the outer end of the cross, and a plurality of scrapers are in contact with the inner wall of the shell.

[0010] Preferably, a belt drive assembly is also provided at the top of the bracket, and the belt drive assembly includes a motor arranged at the top of the bracket, and a transmission wheel fixed at the output end of the motor, and also includes a transmission ring fixed at the outer periphery of the feed cavity, and a transmission belt is sleeved between the transmission ring and the transmission wheel.

[0011] Preferably, a rotating sealing plug is provided at the connection between the feed cavity and the shell.

[0012] Preferably, the spiral conveying chamber assembly includes a sleeve fixed between the shell and the upper cover shell and used to connect the two, and a spiral conveying roller fixed between the transmission rod and the ball. When the belt drive assembly is running, the spiral conveying roller rotates to realize the conveying of the wire.

[0013] Preferably, a heating strip is annularly embedded in the inner wall of the sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention forms a spherical heating cavity between the feed end and the discharge end of the print head through a spherical heating cavity assembly in the middle of the bracket, which is used for uniform heating and melting of the wire. As another embodiment of the present invention, the feed cavity is rotatably mounted with the shell, and the column, heating coil, and the second spring and steel ball inside the heating coil arranged on the upper part of the transmission rod fixed at the bottom thereof realize a stirring effect when the feed cavity rotates. At the same time, the steel ball further improves the melting and mixing effect of the wire by vibration under the action of the second springs on both sides thereof. Here, the heating coil is used for pre-melting of the wire. As another embodiment of the present invention, the tube sleeve where the spiral conveying cavity assembly is located has a heating strip embedded in the inner wall in an annular shape, which further realizes the heat solidification process after the preheating of the wire, and the spherical heating cavity assembly below realizes thorough and uniform heating of the wire. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A side view structural schematic diagram of; Figure 3 It is a schematic diagram of the cross-sectional structure of AA; Figure 4 is a schematic diagram of the cross-sectional structure of BB; Figure 5 for Figure 1 Schematic diagram of the partial disassembly structure; Figure 6 for Figure 5 A schematic diagram of a three-dimensional structure from another perspective; Figure 7 for Figure 5 A schematic diagram of the front view structure of Figure 8 Schematic diagram of the enlarged structure of the stirring chamber assembly.

[0015] In the figure: 1, bracket; 2, spherical heating chamber assembly; 201, sphere; 202, first annular heating tube; 203, upper cover shell; 204, lower cover component; 2041, electric telescopic rod; 2042, mounting frame; 2043, mounting ring; 2044, lower cover shell; 205, second annular heating tube; 3, stirring chamber assembly; 301, feeding chamber; 302, shell; 303, transmission rod; 304, column; 305, heating coil; 306, second spring; 307, steel ball; 308, ten Frame; 309, scraper; 4, spiral conveying chamber assembly; 401, cylinder sleeve; 402, spiral conveying roller; 403, heating strip; 5, discharge pipe assembly; 501, branch pipe; 502, hose; 503, connecting pipe; 6, meshing drive assembly; 601, support rod; 602, connecting block; 603, first spring; 604, arc-shaped rack; 605, long rack; 7, belt drive assembly; 701, motor; 702, transmission wheel; 703, transmission ring; 704, transmission belt; 8, rotary sealing plug. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The following describes various embodiments of the present invention in detail in conjunction with the drawings.

[0017] Example 1 See also Figures 1 to 8 The present invention preferably provides a technical solution: a heating component of a print head, comprising: a bracket 1, a feed heating chamber component, a spherical heating chamber component 2 and a discharge pipe component 5 arranged on the bracket 1 and distributed in an upper, middle and lower manner, the spherical heating chamber component 2 placed in the middle can form a spherical heating chamber between the feed end and the discharge end of the print head; the spherical heating chamber component 2 is composed of a sphere 201, an outer cover shell placed on the outer periphery of the sphere 201, and a first annular heating tube 202 and a second annular heating tube 205, wherein the first annular heating tube 202 and the second annular heating tube 205 are respectively arranged on the opposite surfaces of the sphere 201 and the outer cover shell so that a heating chamber is formed between the sphere 201 and the outer cover shell, which is used for uniformly heating and melting the wire.

[0018] In this embodiment, the feed heating chamber assembly, the spherical heating chamber assembly 2 and the discharge pipe assembly 5 are arranged in the upper, middle and lower parts. Figure 1 , 4, 5, and the spherical heating chamber assembly 2 in the middle can form a spherical heating chamber between the feed end (feed heating chamber assembly) and the discharge end (discharge pipe assembly 5) of the print head, which is used for uniform heating and melting of the wire. The spherical heating chamber assembly 2 in the present application is composed of a sphere 201, an outer cover shell arranged on the outer periphery of the sphere 201, and a first annular heating tube 202 and a second annular heating tube 205, wherein the first annular heating tube 202 and the second annular heating tube 205 are respectively arranged on the opposite surfaces of the sphere 201 and the outer cover shell, thereby forming a heating chamber with heating effects both inside and outside between the sphere 201 and the outer cover shell. This design not only improves the uniformity of heating of the consumables, but also ensures the heating efficiency.

[0019] Furthermore, the outer cover shell includes an upper cover shell 203 fixed to the middle part of the bracket 1, and a lower cover component 204 adapted to engage with the upper cover shell 203, the lower cover component 204 includes an electric telescopic rod 2041 fixed to the bottom of the bracket 1, and a mounting frame 2042 fixed to the telescopic end of the electric telescopic rod 2041, and the mounting frame 2042 is connected to two pairs of rotatable mounting rings 2043 through mounting columns arranged at opposite ends thereof, and each pair of mounting rings 2043 is provided with two, the two mounting rings 2043 close to the inner side are fixed to one of the lower cover shells 2044, and the two mounting rings 2043 close to the outer side are fixed to the other lower cover shell 2044; it also includes an engaging drive assembly 6, when the electric telescopic rod 2041 is extended, The meshing drive assembly 6 can realize the process of the two lower cover shells 2044 being brought together and moved upward to dock with the upper cover shell 203. When the electric telescopic rod 2041 retracts, the two lower cover shells 2044 are separated from the upper cover shell 203 and the expansion process after separation is realized; further, the meshing drive assembly 6 includes a support rod 601, and long racks 605 respectively fixed at both ends of the support rod 601; it also includes arc-shaped racks 604 respectively arranged on the outer walls of the two lower cover shells 2044, wherein the arc-shaped racks 604 are meshed with their corresponding long racks 605; the support rod 601 is close to the connecting block 602 at the end of the bracket 1, which is slidably installed in the inside of the slide groove opened on the side wall of the bracket 1 and is longitudinally connected to the top of the slide groove by a first spring 603.

[0020] Here, the upper cover shell 203 and the lower cover component 204 are adapted to be combined to form the entire spherical cover shell on the outer periphery of the sphere 201. In the present application, the upper cover shell 203 and the lower cover component 204 have opening and closing characteristics to clean the residue of the melted wire inside the spherical heating cavity; Combination Figure 1 , 4, 5, 6, and 7, the mounting frame 2042 is fixed to the telescopic end of the electric telescopic rod 2041, and its opposite end is connected to two pairs of rotatable mounting rings 2043 through mounting columns, and each pair of mounting rings 2043 is provided with two, the two mounting rings 2043 near the inner side are fixed to one of the lower cover shells 2044, and the two mounting rings 2043 near the outer side are fixed to the other lower cover shell 2044, and the mounting rings 2043 near the outer side are fixed to the other lower cover shell 2044. Figure 6 As shown, the driving assembly provided here can enable the two lower covers 2044 to realize longitudinal movement and the process of closing or separating with the upper cover 203, and realize the process of merging and separating the two lower covers 2044; Specific, combined Figure 1 As shown in the figure, when the electric telescopic rod 2041 is extended, the electric telescopic rod 2041 drives the mounting frame 2042, the mounting ring 2043 and the lower cover 2044 at its end to move upward as a whole. Since the arc-shaped rack 604 on the outer wall of the lower cover 2044 is meshed with the long rack 605 that is fixed at this time, the two lower covers 2044 can be relatively deflected downward by the meshing characteristics of the arc-shaped rack 604 and the long rack 605, so that ... arc-shaped The combination forms a semicircle, and as the electric telescopic rod 2041 is further extended, since the two lower cover shells 2044 are combined, the long rack 605 and the arc-shaped rack 604 are equivalent to a buckle, and the two long racks 605 can move upward under the action of their corresponding arc-shaped racks 604, thereby causing the support rod 601 and the connecting block 602 to move upward and the connecting block 602 to be compressed until the two lower cover shells 2044 and the upper cover shell 203 are closed and form a full circle; When the electric telescopic rod 2041 is Figure 1 When the lower cover 2044 moves downward, the two lower cover shells 2044 can move downward, and the connecting block 602, the support rod 601 and the long rack 605 move downward with the lower cover shell 2044. The reason is that: the first spring 603 is Figure 1 It is in a compressed state. When it loses pressure, its restoring power can make the connecting block 602, the support rod 601 and the long rack 605 move downward with the lower cover shell 2044 until they move to the initial upward point of the connecting block 602, that is, the bottom of the slide groove. Then the electric telescopic rod 2041 moves further downward. At this time, the support rod 601, the connecting block 602 and the long rack 605 remain stationary, and the two lower cover shells 2044 can realize the deflection separation process in the separation direction under the mutual meshing action of the long rack 605 and the arc-shaped rack 604.

[0021] Example 2 As another embodiment of the present invention, the discharge pipe assembly 5 includes a branch pipe 501 fixed at the bottom of each lower cover shell 2044 and connected to the lower cover shell 2044, and a hose 502 arranged at the bottom ends of the two branch pipes 501; it also includes a connecting pipe 503 connected to the bottom end of the hose 502, and the support rod 601 is fixed on the connecting pipe 503.

[0022] Combination Figure 1 , 2 As shown in Figure 4, it is known that the two lower covers 2044 have the functions of merging and separating. Here, the top of the hose 502 is connected to the two lower covers 2044 through two branch pipes 501, and the bottom is connected with a connecting pipe 503. Therefore, when the two lower covers 2044 are running, the hose 502 is deformed to adapt to the movement characteristics of the two lower covers 2044 while ensuring the discharge process.

[0023] Example 3 As other embodiments of the present invention, a feed heating chamber assembly is composed of a stirring chamber assembly 3 and a spiral conveying chamber assembly 4; wherein the spiral conveying chamber assembly 4 is placed between the stirring chamber assembly 3 and the spherical heating chamber assembly 2 and is used to connect the two; the stirring chamber assembly 3 includes a shell 302 fixed on the upper part of the bracket 1, and a feed chamber 301 rotatably connected to the top center of the shell 302, and the feed chamber 301 is composed of a conical cavity and a transmission cavity distributed inside and outside the shell 302; the conical cavity is a hollow structure, and a transmission rod 303 is fixed at its bottom; it also includes a column 304 annularly fixed on the upper wall of the transmission rod 303, and a heating coil 305 fixed at the outer end of each column 304, two second springs 306 and a steel ball 307 are arranged inside the column, and the steel ball 307 is arranged at the opposite ends of the two second springs 306, and the opposite ends of the two second springs 306 are connected to the opposite surfaces of the heating coil 305.

[0024] Combination Figure 3 , 4 As shown in Figures 7 and 8, the feed cavity 301 is rotatably mounted with the shell 302. The column 304, the heating coil 305, and the second spring 306 and the steel ball 307 arranged on the upper part of the transmission rod 303 fixed at the bottom thereof realize the stirring effect when the feed cavity 301 rotates. At the same time, the steel ball 307 further improves the melting and mixing effect of the wire material by vibration under the action of the second spring 306 on both sides thereof. Here, the heating coil 305 is used for pre-melting the wire material, and the feed cavity 301, as shown in Figures 7 and 8, Figure 6 , 7 8. The feed cavity 301 is composed of a conical cavity and a transmission cavity distributed inside and outside the shell 302; the conical cavity is a hollow structure. When feeding, the material enters from the top of the feed cavity 301 and converges to the conical cavity at the lower part of the feed cavity 301 and enters the shell 302 through the hollow part where the conical cavity is located. Furthermore, a cross 308 and a scraper 309 annularly fixed to the outer end of the cross 308 are fixed to the lower wall of the transmission rod 303 , and a plurality of scrapers 309 are in contact with the inner wall of the shell 302 .

[0025] Combination Figure 4 , 7As shown, the cross 308 is fixed at the lower part of the transmission rod 303, and the scraper 309 arranged on its periphery is in contact with the inner wall of the shell 302. Therefore, when the transmission rod 303 rotates, the cross 308 stirs the wire below the shell 302, and the scraper 309 further scrapes the inside of the shell 302, so as to improve the stirring effect and ensure the cleanliness of the inner wall of the shell 302.

[0026] Furthermore, a belt transmission assembly 7 is also provided at the top of the bracket 1. The belt transmission assembly 7 includes a motor 701 provided at the top of the bracket 1, a transmission wheel 702 fixed to the output end of the motor 701, and a transmission ring 703 fixed to the outer periphery of the feed cavity 301. A transmission belt 704 is sleeved between the transmission ring 703 and the transmission wheel 702. Figure 1 , 3 shown.

[0027] Furthermore, a rotary sealing plug 8 is provided at the connection between the feed cavity 301 and the shell 302. Figure 1 , to ensure the sealing of the connection between the feed cavity 301 and the shell 302.

[0028] Furthermore, the spiral conveying chamber assembly 4 includes a sleeve 401 fixed between the shell 302 and the upper cover shell 203 and used to connect the two, and a spiral conveying roller 402 fixed between the transmission rod 303 and the ball 201. When the belt transmission assembly 7 is running, the spiral conveying roller 402 rotates to realize the conveying of the wire.

[0029] Here, the sleeve 401 and the spiral conveying roller 402 are respectively fixed between the shell 302 and the upper cover shell 203, and between the transmission rod 303 and the sphere 201, playing the role of feeding and supporting. Since the spiral conveying roller 402 is fixed between the transmission rod 303 and the sphere 201, the belt drive assembly 7 can drive the stirring chamber assembly 3, the spiral conveying chamber assembly 4, and the spherical heating chamber assembly 2 to operate synchronously, thereby driving the overall operation of the device in a low energy consumption manner and improving the energy-saving effect of the device.

[0030] Furthermore, a heating strip 403 is annularly embedded in the inner wall of the sleeve 401, which further realizes the heating effect of the spiral conveying chamber component 4 and realizes the heat consolidation process after the wire is preheated, while the spherical heating chamber component 2 below realizes thorough and uniform heating of the wire; The present application realizes a multi-stage heating process of the wire by sequentially arranging the stirring chamber assembly 3, the spiral conveying chamber assembly 4, and the spherical heating chamber assembly 2, thereby ensuring the heating efficiency and quality of the wire.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. There are many ways of detachable installation, for example, it can be through the method of plug-in and snap-on matching, and for example, through the method of bolt connection, etc.

[0032] The above clearly and completely describes the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation.

[0033] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above invention, which fall within the scope of protection of the present invention.

Claims

1. A heating assembly for a print head, characterized in that: include: A support (1), a feed heating chamber assembly, a spherical heating chamber assembly (2) and a discharge pipe assembly (5) arranged on the support (1) and arranged in an upper, middle and lower arrangement, wherein the spherical heating chamber assembly (2) arranged in the middle can form a spherical heating chamber between the feed end and the discharge end of the print head; The spherical heating chamber assembly (2) is composed of a sphere (201), an outer cover shell disposed on the outer periphery of the sphere (201), and a first annular heating tube (202) and a second annular heating tube (205), wherein the first annular heating tube (202) and the second annular heating tube (205) are respectively disposed on opposite surfaces of the sphere (201) and the outer cover shell, so that a heating chamber is formed between the sphere (201) and the outer cover shell, which is used for uniformly heating and melting the wire.

2. A heating assembly for a print head according to claim 1, characterized in that: The outer cover shell comprises an upper cover shell (203) fixed to the middle part of the bracket (1), and a lower cover component (204) adapted to engage with the upper cover shell (203); the lower cover component (204) comprises an electric telescopic rod (2041) fixed to the bottom of the bracket (1), and a mounting frame (2042) fixed to the telescopic end of the electric telescopic rod (2041); the mounting frame (2042) is connected to two pairs of rotatable mounting rings (2043) via mounting columns provided at opposite ends thereof; each pair of mounting rings (2043) is provided with two mounting rings, the two mounting rings (2043) close to the inner side are fixed to one of the lower cover shells (2044), and the two mounting rings (2043) close to the outer side are fixed to the other lower cover shell (2044); It also includes an engagement drive assembly (6). When the electric telescopic rod (2041) is extended, the engagement drive assembly (6) can realize a process in which the two lower covers (2044) are brought together and moved upward to dock with the upper cover (203). When the electric telescopic rod (2041) is retracted, the two lower covers (2044) are separated from the upper cover (203) and an expansion process after separation is realized.

3. A heating assembly for a print head according to claim 2, characterized in that: The meshing drive assembly (6) comprises a support rod (601) and long racks (605) respectively fixed to two ends of the support rod (601); It also includes arc-shaped racks (604) respectively arranged on the outer walls of the two lower casings (2044), wherein the arc-shaped racks (604) mesh with their corresponding long racks (605); The connecting block (602) of the support rod (601) close to the end of the bracket (1) is slidably mounted inside a slide groove provided on the side wall of the bracket (1) and is longitudinally connected to the top of the slide groove by a first spring (603).

4. A heating assembly for a print head according to claim 3, characterized in that: The discharge pipe assembly (5) comprises a branch pipe (501) fixed at the bottom of each lower cover shell (2044) and connected to the lower cover shell (2044), and a hose (502) arranged at the bottom ends of the two branch pipes (501); and also comprises a connecting pipe (503) connected to the bottom ends of the hoses (502), and the support rod (601) is fixed on the connecting pipe (503).

5. A heating assembly for a print head according to claim 1, characterized in that: The feed heating chamber assembly is composed of a stirring chamber assembly (3) and a screw conveying chamber assembly (4); The spiral conveying chamber component (4) is disposed between the stirring chamber component (3) and the spherical heating chamber component (2) and is used to connect the two. The stirring chamber assembly (3) comprises a shell (302) fixed to the upper part of the bracket (1), and a feed chamber (301) rotatably connected to the top center of the shell (302), and the feed chamber (301) is composed of a conical cavity and a transmission cavity distributed inside and outside the shell (302); the conical cavity is a hollow structure, and a transmission rod (303) is fixed at the bottom thereof; It also includes a column (304) annularly fixed to the upper wall of the transmission rod (303), and a heating coil (305) fixed at the outer end of each column (304), wherein two second springs (306) and a steel ball (307) are arranged inside the column (304), and the steel ball (307) is arranged at the opposite ends of the two second springs (306), and the opposite ends of the two second springs (306) are connected to the opposite surfaces of the heating coil (305).

6. A heating assembly for a print head according to claim 5, characterized in that: A cross (308) and a scraper (309) annularly fixed to the outer end of the cross (308) are also fixed to the lower wall of the transmission rod (303), and a plurality of scrapers (309) are in contact with the inner wall of the housing (302).

7. A heating assembly for a print head according to claim 5, characterized in that: A belt transmission assembly (7) is also provided at the top of the support (1), and the belt transmission assembly (7) comprises a motor (701) provided at the top of the support (1), and a transmission wheel (702) fixed at the output end of the motor (701), and also comprises a transmission ring (703) fixed on the outer periphery of the feed cavity (301), and a transmission belt (704) is sleeved between the transmission ring (703) and the transmission wheel (702).

8. A heating assembly for a print head according to claim 5, characterized in that: A rotating sealing plug (8) is provided at the connection between the feed cavity (301) and the shell (302).

9. A heating assembly for a print head according to claim 5, characterized in that: The spiral conveying chamber assembly (4) comprises a sleeve (401) fixed between the housing (302) and the upper cover (203) and used to connect the two, and a spiral conveying roller (402) fixed between the transmission rod (303) and the ball (201); when the belt transmission assembly (7) is running, the spiral conveying roller (402) rotates to realize the conveyance of the wire.

10. A heating assembly for a print head according to claim 9, characterized in that: A heating strip (403) is annularly embedded in the inner wall of the cylinder sleeve (401).

Images