A compound 3D printing head

Abstract

The application relates to a mixing 3D printing head, which comprises a nozzle, a heating block arranged above the nozzle, a radiator arranged above the heating block, and three annularly equidistantly distributed throat pipes arranged between the heating block and the radiator; through the arrangement of the nozzle, the heating block, the radiator, the throat pipes and a mixer and the like, raw materials enter the multiple throat pipes through the radiator and enter the mixer in the heating block through the multiple throat pipes, the mixer is provided with a first spiral groove, a second spiral, a first connecting hole and a second connecting hole and the like, on one hand, the spiral groove lengthens the mixing cavity, so that multiple raw materials are fully mixed in the flowing process; on the other hand, different holes are used for segmenting and mixing the raw materials, so that a better mixing and color mixing effect is achieved; the design improves the mixing and color mixing effect of the multiple raw materials in the printing head through the increased mixer, and is beneficial to guaranteeing the quality and effect of the printing finished product.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing technology, in particular to a mixed 3D printing head. BACKGROUND

[0002] 3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing, which is a technology that uses digital model files as the basis, and uses powder-like metal or plastic and other materials that can be bonded to construct objects through layer-by-layer printing. A 3D printer mainly consists of a frame, a printing platform and a printing head.

[0003] Currently, in 3D printing, there are two types of multi-material printing: one is multi-in multi-out, and the other is multi-in single-out. Multi-in multi-out: each material is extruded by its own nozzle and cannot be mixed, resulting in different colors. Multi-in single-out: each material is extruded by the same nozzle and can mix several different colors to produce different colors. At present, the commonly used printing head type is multi-in single-out printing head. However, the existing printing cavity mixing cavity is very short, and different raw materials have not been completely mixed before being extruded through the nozzle, resulting in poor mixing effect and affecting the printing effect of the finished product. In view of this, we propose a mixed 3D printing head. SUMMARY

[0004] The purpose of the present application is to provide a mixed 3D printing head to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A mixed 3D printing head, comprising a nozzle, a heating block is arranged above the nozzle, a heat sink is arranged above the heating block, three throat pipes are arranged between the heating block and the heat sink, the throat pipes are arranged in a ring shape and are equally spaced, a plurality of locking bolts are threadedly connected to the outer wall of the heat sink, and a mixer is arranged between the nozzle and the heating block.

[0007] As a preferred technical solution of the present application, a lower mixing cavity is formed in the top surface of the nozzle, a connecting cavity and a discharge hole are sequentially formed from top to bottom below the lower mixing cavity, the discharge hole penetrates the nozzle, and the lower mixing cavity, the connecting cavity and the discharge hole are sequentially connected in communication.

[0008] As a preferred technical solution of the present application, a plurality of channels are formed in the interior of the heating block in a ring shape and equally spaced, a plurality of first threaded cavities are formed in the top surface of the heating block in a ring shape and equally spaced, the channels are respectively connected in communication with the corresponding first threaded cavities, an upper mixing cavity is formed in the interior center of the heating block, one end of each of the channels is connected in communication with the upper mixing cavity, a second threaded cavity is formed below the upper mixing cavity, and the top end of the nozzle is threadedly connected with the second threaded cavity.

[0009] As the preferred technical scheme of the present application, the throat pipe is internally provided with a flow channel, the flow channel penetrates the throat pipe; the bottom end of the throat pipe is threadedly connected with a corresponding first threaded cavity, and the flow channel is in communication with the corresponding first threaded cavity.

[0010] As the preferred technical scheme of the present application, a plurality of feed holes in the form of annular equidistant distribution are formed on the radiator, the feed holes penetrate the radiator; the top end of the throat pipe penetrates into a corresponding feed hole, the flow channel is in communication with the feed hole, and the throat pipe is fixedly connected with the radiator through a locking bolt.

[0011] As the preferred technical scheme of the present application, the top end of the mixer is inserted into the upper mixing cavity, and the bottom end of the mixer is inserted into the lower mixing cavity; a first spiral groove is formed on the upper part of the mixer, the first spiral groove is located in the upper mixing cavity and is in communication with the upper mixing cavity, an axial hole is formed on the top surface of the mixer, the axial hole is in communication with the upper mixing cavity, a plurality of first connecting holes in the form of annular equidistant distribution are formed on the inner wall of the axial hole close to the bottom end, the first connecting holes penetrate the mixer and are in communication with the lower mixing cavity.

[0012] As the preferred technical scheme of the present application, a limiting ring is arranged on the mixer close to the middle part, the limiting ring abuts against the top surface of the second threaded cavity, and the top end of the nozzle abuts against the bottom surface of the limiting ring; a second spiral groove is formed on the lower part of the mixer, the second spiral groove is located in the lower mixing cavity and is in communication with the lower mixing cavity, a through hole is formed on the bottom surface of the mixer, the through hole is in communication with the connecting cavity, a plurality of second connecting holes in the form of annular equidistant distribution are formed on the inner wall of the through hole, the second connecting holes penetrate the mixer and are in communication with the second spiral groove.

[0013] As the preferred technical scheme of the present application, the size of the mixer is adapted to the size of the lower mixing cavity and the size of the upper mixing cavity.

[0014] As the preferred technical scheme of the present application, the overall shape of the first spiral groove and the second spiral groove is in the form of spiral.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] Through the set nozzle, heating block, radiator, throat pipe and mixer etc.: namely the raw material enters into multiple throat pipes through the radiator, and enters into the mixer in the heating block through multiple throat pipes, and the mixer is provided with first spiral groove, second spiral, first connecting hole and second connecting hole etc., on one hand: the spiral groove lengthens the mixing cavity, so that multiple raw materials are fully mixed in the flowing process; on the other hand: different holes are used to divide and mix the raw materials, so that the mixing and color mixing effect is good; the design improves the mixing and color mixing effect of multiple raw materials in the print head through the increased mixer, which is beneficial to guarantee the quality and effect of the printing finished product. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic diagram of the application;

[0018] Figure 2 It is the overall structure front view of the application;

[0019] Figure 3 It is the overall explosion structure schematic diagram of the application;

[0020] Figure 4 It is the overall structure sectional view of the application;

[0021] Figure 5 It is the overall structure schematic diagram of the application Figure 4 It is the enlarged structure schematic diagram of A in the application;

[0022] Figure 6 It is the structure sectional view of the heating block in the application;

[0023] Figure 7 It is the structure schematic diagram of the mixer in the application;

[0024] Figure 8 It is the structure sectional view of the mixer in the application.

[0025] In the drawing:

[0026] 1, nozzle; 11, lower mixing cavity; 12, connecting cavity; 13, discharge hole;

[0027] 2, heating block; 21, channel; 22, first threaded cavity; 23, upper mixing cavity; 24, second threaded cavity;

[0028] 3, throat pipe; 31, flow channel;

[0029] 4, radiator; 41, feed hole;

[0030] 5, locking bolt;

[0031] 6, mixer; 61, first helical groove; 62, axial hole; 63, first connecting hole; 64, limiting ring; 65, second helical groove; 66, through hole; 67, second connecting hole. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0034] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] The present embodiment provides a technical solution:

[0036] Please refer to Figures 1-6 A mixing 3D printing head, comprising a nozzle 1. The top surface of the nozzle 1 is provided with a lower mixing cavity 11, and a connecting cavity 12 and a discharge hole 13 are sequentially provided below the lower mixing cavity 11 from top to bottom. The discharge hole 13 penetrates the nozzle 1, and the lower mixing cavity 11, the connecting cavity 12 and the discharge hole 13 are sequentially connected in communication; a plurality of materials are mixed in the through hole 66, and after mixing, they are sprayed out of the discharge hole 13 to the outside, thereby completing the printing work.

[0037] Specifically, the upper part of the nozzle 1 is provided with a heating block 2; a plurality of annularly and equidistantly distributed channels 21 are formed in the interior of the heating block 2, a plurality of annularly and equidistantly distributed first threaded cavities 22 are formed in the top surface of the heating block 2, the channels 21 are respectively communicated with the corresponding first threaded cavities 22, an upper mixing cavity 23 is formed at the interior center of the heating block 2, one end of each of the channels 21 is communicated with the upper mixing cavity 23, a second threaded cavity 24 is formed below the upper mixing cavity 23, and the top end of the nozzle 1 is threadedly connected with the second threaded cavity 24; the first threaded cavities 22 and the second threaded cavity 24 are arranged to facilitate the connection with the throat pipes 3 and the nozzle 1 respectively, and the threaded connection has the advantages of quick connection and good sealing, which facilitates the installation and avoids the penetration of the materials to the outside.

[0038] Specifically, three annularly and equidistantly distributed throat pipes 3 are arranged between the heating block 2 and the radiator 4; a flow channel 31 is formed in the interior of each of the throat pipes 3, and the flow channel 31 penetrates through the throat pipe 3; the bottom end of each of the throat pipes 3 is threadedly connected with the corresponding first threaded cavity 22, and the flow channel 31 is communicated with the corresponding first threaded cavity 22, so that the throat pipes 3 play a connecting role between the radiator 4 and the heating block 2, and facilitate the transition of the multiple materials from the radiator 4 to the heating block 2 for mixing.

[0039] Specifically, the upper part of the heating block 2 is provided with a radiator 4; a plurality of annularly and equidistantly distributed feeding holes 41 are formed in the radiator 4, and the feeding holes 41 penetrate through the radiator 4; the top end of each of the throat pipes 3 penetrates into the corresponding feeding hole 41, the flow channel 31 is communicated with the feeding hole 41, and the throat pipe 3 is fixedly connected with the radiator 4 through a locking bolt 5, so that the radiator 4 and the plurality of feeding holes 41 are arranged to facilitate the introduction of multiple materials for mixing.

[0040] Please refer to Figures 7 to 8 , a plurality of locking bolts 5 are threadedly connected with the outer wall of the radiator 4, and a mixer 6 is arranged between the nozzle 1 and the heating block 2. The top end of the mixer 6 penetrates into the upper mixing cavity 23, and the bottom end of the mixer 6 penetrates into the lower mixing cavity 11; a first helical groove 61 is formed in the upper part of the mixer 6, and the first helical groove 61 is located in the upper mixing cavity 23 and is communicated with the upper mixing cavity 23; an axial hole 62 is formed in the top surface of the mixer 6, the axial hole 62 is communicated with the upper mixing cavity 23, a plurality of annularly and equidistantly distributed first connecting holes 63 are formed in the inner wall of the axial hole 62 close to the bottom end, the first connecting holes 63 penetrate through the mixer 6 and are communicated with the lower mixing cavity 11; the raw materials enter the plurality of channels 21 through the flow channels 31, and then enter the first helical groove 61 through the plurality of through holes 21, the multiple different raw materials flow upwards along the first helical groove 61, and are mixed with each other in the process of flowing, and the preliminarily mixed raw materials enter the axial hole 62 after leaving the first helical groove 61, so that the multiple raw materials can be mixed for the first time in the first helical groove 61 in the process of flowing.

[0041] Specifically, the mixing device 6 is provided with a limiting ring 64 near the middle part, the limiting ring 64 abuts against the top surface of the second threaded cavity 24, and the top end of the nozzle 1 abuts against the bottom surface of the limiting ring 64; the design of the limiting ring 64 plays a limiting role, which facilitates the multiple raw materials to enter the axial hole 62.

[0042] Specifically, the bottom surface of the mixing device 6 is provided with a through hole 66, the through hole 66 is in communication with the connecting cavity 12, a plurality of second connecting holes 67 are arranged on the inner wall of the through hole 66 in a ring shape and at equal intervals, the second connecting holes 67 penetrate the mixing device 6 and are in communication with the second spiral groove 65; the twice-mixed raw materials are divided into multiple streams through the second connecting holes 67 and then enter the through hole 66 again for mixing, and then enter the connecting cavity 12 through the through hole 66, and finally the completely mixed raw materials can be extruded out of the material outlet 13 to the outside, which facilitates the multiple raw materials to be finally mixed in the through hole 66 during the flowing process, and improves the mixing effect of the multiple raw materials again.

[0043] In the embodiment, the size of the mixing device 6 is adapted to the size of the lower mixing cavity 11 and the size of the upper mixing cavity 23, which facilitates the two ends of the mixing device 6 to be adaptively installed in the lower mixing cavity 11 and the upper mixing cavity 23, and facilitates the multiple raw materials to flow and mix in the first spiral groove 61 and the second spiral groove 65.

[0044] In the embodiment, the overall shape of the first spiral groove 61 and the second spiral groove 65 is in a spiral shape, which increases the overall length of the first spiral groove 61 and the second spiral groove 65, thereby facilitating the multiple raw materials to be fully mixed and colored during the flowing process, and improving the mixing effect.

[0045] It should be noted that the limiting ring 64 and the mixing device 6 in the embodiment are integrally formed, the design of the limiting ring 64 plays a limiting role, when the limiting ring 64 abuts against the top surface of the second threaded cavity 24, the mixing device 6 cannot continue to move upward, at this time, there is a gap between the top end of the mixing device 6 and the top surface of the upper mixing cavity 23, through the gap, the multiple raw materials can enter the axial hole 62 for mixing.

[0046] In use, different raw materials enter the plurality of feeding holes 41, and then enter the flow channels 31 in the plurality of different throat pipes 3 through the plurality of feeding holes 41, and then the raw materials enter the plurality of passages 21 through the flow channels 31, and then enter the first spiral groove 61 through the plurality of through holes 21, at this time, the different raw materials flow upwards along the first spiral groove 61 and mix with each other in the process of flowing, and then the preliminarily mixed raw materials enter the axial hole 62 from the first spiral groove 61, at this time, the preliminarily mixed raw materials enter the second spiral groove 65 through the plurality of first connecting holes 63, and then the preliminarily mixed raw materials flow downwards in the second spiral groove 65 and mix again in the process of flowing, and then the mixed raw materials enter the through hole 66 again after being divided by the plurality of second connecting holes 67, and then the mixed raw materials enter the connecting cavity 12 through the through hole 66, and finally the mixed raw materials are extruded to the outside through the discharging hole 13.

[0047] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application, and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mixing 3D printing head, comprising a nozzle (1), characterized in that: A heating block (2) is provided above the nozzle (1), and a radiator (4) is provided above the heating block (2). Three throats (3) are provided between the heating block (2) and the radiator (4) in an annular arrangement. Multiple locking bolts (5) are threaded onto the outer wall of the radiator (4). A mixer (6) is provided between the nozzle (1) and the heating block (2). The top end of the mixer (6) is inserted into the upper mixing chamber (23), and the bottom end of the mixer (6) is inserted into the upper mixing chamber (23). The mixer (6) is connected to the lower mixing chamber (11). A first spiral groove (61) is provided at the upper part of the mixer (6), which is located within and communicates with the upper mixing chamber (23). An axial hole (62) is provided on the top surface of the mixer (6), which communicates with the upper mixing chamber (23). Multiple first connecting holes (63) are provided on the inner wall of the axial hole (62) near the bottom, arranged in an annular pattern and evenly spaced. The first connecting holes (63) penetrate... The mixer (6) is connected to the lower mixing chamber (11); a limiting ring (64) is provided near the middle of the mixer (6), the limiting ring (64) abuts against the top surface of the second threaded cavity (24), and the top of the nozzle (1) abuts against the bottom surface of the limiting ring (64); a second spiral groove (65) is provided at the lower part of the mixer (6), the second spiral groove (65) is located in the lower mixing chamber (11) and is connected to the lower mixing chamber (11), and a through-hole is provided on the bottom surface of the mixer (6). The through hole (66) is connected to the connecting cavity (12). Multiple second connecting holes (67) are provided on the inner wall of the through hole (66) in an annular and equally spaced manner. The second connecting holes (67) pass through the mixer (6) and are connected to the second spiral groove (65). The overall shape of the first spiral groove (61) and the second spiral groove (65) is spiral. The size of the mixer (6) is adapted to the size of the lower mixing cavity (11) and the upper mixing cavity (23).

2. The mixing 3D printing head according to claim 1, characterized in that: The nozzle (1) has a lower mixing chamber (11) on its top surface. The lower mixing chamber (11) has a connecting chamber (12) and a discharge hole (13) arranged from top to bottom. The discharge hole (13) passes through the nozzle (1), and the lower mixing chamber (11), the connecting chamber (12) and the discharge hole (13) are connected in sequence.

3. The mixing 3D printing head according to claim 1, characterized in that: The heating block (2) has multiple channels (21) arranged in a ring at equal intervals inside. The top surface of the heating block (2) has multiple first threaded cavities (22) arranged in a ring at equal intervals. The channels (21) are connected to the corresponding first threaded cavities (22). The heating block (2) has an upper mixing cavity (23) at its center. One end of each channel (21) is connected to the upper mixing cavity (23). A second threaded cavity (24) is provided below the upper mixing cavity (23). The top of the nozzle (1) is threadedly connected to the second threaded cavity (24).

4. The mixing 3D printing head according to claim 1, characterized in that: The throat (3) has a flow channel (31) inside, and the flow channel (31) passes through the throat (3); the bottom end of the throat (3) is threadedly connected to the corresponding first threaded cavity (22), and the flow channel (31) is connected to the corresponding first threaded cavity (22).

5. The mixing 3D printing head according to claim 4, characterized in that: The radiator (4) has multiple feed holes (41) arranged in a ring at equal intervals, and the feed holes (41) penetrate the radiator (4); the top end of the throat (3) is inserted into the corresponding feed hole (41), the flow channel (31) is connected to the feed hole (41), and the throat (3) is fixedly connected to the radiator (4) by locking bolts (5).

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