Multi-color printing head for 3D printer

Abstract

The utility model relates to the field of 3D printing, and discloses a multicolor printing head for a 3D printer, which comprises a shell (1) and a printing nozzle (2) mounted on the shell (1), a consumable channel is arranged in the shell (1) and comprises a plurality of branch channels (3) and a main channel (4), the branch channels (3) are communicated with the main channel (4), and the main channel (4) is communicated with the shell (1). And the other end of the main channel (4) is connected with the printing nozzle (2) and conveys printing supplies to the printing nozzle (2). Through the design of multi-channel switching, each channel is independently connected with one color material, automatic switching of at most 12 colors is supported, single-nozzle output is matched, the structure of the printing head is simplified, complexity of a multi-nozzle scheme is avoided, and meanwhile printing precision is ensured; in addition, the cutter part can accurately cut off the current material, the problems of trailing and blocking are avoided, and the switching efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing field especially relates to a multicolor printing head for 3D printer. BACKGROUND

[0002] With the popularization of 3D printing technology, the demand for multi-color printing is increasing. However, the traditional 3D printing head still has the following limitations in multi-color printing. The traditional printing head can usually only print single-color materials, and manual material replacement is required to achieve multi-color printing, or different color materials are replaced in the material replacement box and then remotely sent into the nozzle. Both of these two methods are inefficient, and the material waste in the cleaning process of the nozzle circulation path is serious.

[0003] However, the multi-channel extruder and multi-switch printing head machine in the prior art can usually only support 2 to 4 color switching, which is difficult to meet the printing scene of 12 colors or more colors with high demand. The cost of the multi-extruder increases, the printing precision of the multi-printing head decreases due to repeated positioning, the switching process is not accurate enough, and the multi-nozzle printing is misaligned, causing color mixing, overlapping and misalignment. In addition, there is also a lack of cutting function for unfinished materials, resulting in tailing or clogging problems during material switching. SUMMARY

[0004] The utility model provides a multicolor printing head for 3D printer in view of the prior art shortcoming.

[0005] To solve the above technical problems, the utility model solves the problem by the following technical scheme:

[0006] A multicolor printing head for 3D printer, comprising a shell and a printing nozzle mounted on the shell, a consumable channel is provided in the shell, the consumable channel comprises a plurality of fan-shaped three-dimensional staggered distribution branch channels and a merging main channel, the branch channel is communicated with the main channel at a convergence point, and the other end of the main channel is connected with the printing nozzle and delivers printing consumables to the printing nozzle.

[0007] As a preferred embodiment, it further comprises a consumable conveying assembly, the printing consumables are connected with the consumable conveying assembly and are driven by the consumable conveying assembly to move in the channel.

[0008] As a preferred embodiment, the consumable conveying assembly comprises a driving wheel connected with a motor, the driving wheel is in contact with the consumables and drives the movement of the consumables.

[0009] As a preferred embodiment, there are twelve or more branch channels, and the branch channels are uniformly distributed. By providing twelve or more branch channels, the switching of twelve or more consumables is realized. When different consumables need to be switched, the printing consumables in the channel are recycled by cooperating with the consumable conveying assembly, and then another printing consumable is conveyed into the channel by the consumable conveying assembly for new printing.

[0010] As preferred, a heat dissipation assembly is further connected between the main channel and the printing nozzle, the heat dissipation assembly comprising a heat dissipation plate and a heat dissipation fan, the heat dissipation plate being sleeved on the outer wall of the main channel, and the heat dissipation fan being located at one side of the heat dissipation plate and blowing air towards the heat dissipation plate.

[0011] As preferred, a heating assembly is further included, the heating assembly being sleeved on the outer wall of the main channel, the heating assembly being located below the heat dissipation device, and the heating assembly being arranged above the printing nozzle at the end close to the printing nozzle, the heating assembly comprising a heating rod and a temperature sensor.

[0012] As preferred, a protective sleeve is further sleeved on the heating assembly.

[0013] As preferred, a PCB circuit board is further mounted on the shell; and a leveling switch is further mounted on the shell.

[0014] As preferred, a cutter member is further included, one end of the cutter member being hingedly connected to the shell, a blade for cutting the printing consumables being mounted on the cutter member, and the blade being located at the outlet of the main channel and being connected by a connecting rod.

[0015] As preferred, a model cooling fan is further mounted on the side wall of the shell, the model cooling fan blowing air towards the model and rapidly cooling the model.

[0016] The application has the following technical effects: the design of the multi-channel switching enables each channel to be independently connected to one color material, supports automatic switching of up to 12 colors, cooperates with single-nozzle output, simplifies the structure of the printing head, avoids the complexity of the multi-nozzle scheme, and ensures printing accuracy; in addition, the cutter member can accurately cut the current material, avoids tailing and blocking problems, and improves switching efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model Figure I .

[0018] Figure 2 is a partial structural schematic diagram of the utility model.

[0019] Figure 3 is a structural schematic diagram of the utility model Figure II .

[0020] The names of the parts referred to by the numbers in the drawings are as follows: 1 - housing, 2 - printing nozzle, 3 - branch channel, 4 - main channel, 5 - consumable conveying assembly, 6 - heat dissipation plate, 61 - heat dissipation fan, 7 - heating assembly, 8 - leveling switch, 9 - cutter, 91 - blade, 10 - model cooling fan. DETAILED DESCRIPTION

[0021] The utility model will be described in further detail below in combination with the drawings and examples.

[0022] Example 1

[0023] A multi-color printing head for a 3D printer, as shown, comprises a housing 1 and a printing nozzle 2 mounted on the housing 1, and a consumable channel is arranged in the housing 1, the consumable channel comprises a plurality of branch channels 3 and a main channel 4, the branch channels 3 are all in communication with the main channel 4, and the other end of the main channel 4 is connected with the printing nozzle 2 and conveys printing consumables to it.

[0024] It also comprises a consumable conveying assembly 5, and the printing consumables are connected with the consumable conveying assembly 5 and are moved in the channel by the consumable conveying assembly 5.

[0025] The consumable conveying assembly 5 comprises a driving wheel connected with a motor, which is in contact with the consumables and drives the movement of the consumables.

[0026] There are twelve branch channels 3, which are evenly distributed among the branch channels 3. The upper end of the housing 1 is provided with two rows of branch channel holes, each row of branch channel holes is distributed in an arc shape, and different branch channels 3 are connected with the consumable conveying assembly 5 through the branch channel holes. Through the arrangement of the twelve branch channels 3, the random switching of twelve consumables is realized. When it is necessary to switch different consumables, the printing consumables in the channel are recycled in cooperation with the consumable conveying assembly 5, and then the consumable conveying assembly 5 is controlled to convey another printing consumable into the channel for new printing.

[0027] Example 2

[0028] The same as example 1, except that a heat dissipation assembly is further connected between the main channel 4 and the printing nozzle 2, the heat dissipation assembly comprises a heat dissipation plate 6 and a heat dissipation fan 61, the heat dissipation plate 6 is sleeved on the outer wall of the main channel 4, and the heat dissipation fan 61 is located on one side of the heat dissipation plate 6 and blows air towards the heat dissipation plate 6. The function of the heat dissipation fan is to cool the heat dissipation fins, so that the heat is only left in the lower part of the heat dissipation plate 6, ensuring that the filament conveying channel outside the heating assembly remains low temperature, preventing the consumables from softening in advance and causing blockage in the channel.

[0029] Example 3

[0030] The same as example 1, different is further comprising heating assembly 7, heating assembly 7 is sleeved on the outer wall of main channel 4, heating assembly 7 is located below the heat dissipation device, heating assembly 7 is located above the printing nozzle 2 and close to one end of the printing nozzle 2, heating assembly 7 comprises a heating rod and a temperature sensor. The printing consumables are heated by heating assembly 7 and smoothly ejected from the printing nozzle 2.

[0031] The heating assembly 7 is further sleeved with a protective sleeve.

[0032] Example 4

[0033] The same as example 1, different is that the housing 1 is further provided with a PCB circuit board; the housing 1 is further provided with a leveling switch 8.

[0034] Example 5

[0035] The same as example 1, different is further comprising a cutter 9, one end of the cutter 9 is hinged on the housing 1, the cutter 9 is provided with a blade 91 for cutting the printing consumables, the blade 91 is located at the outlet of the main channel 4. By impacting the cutter 9, the blade 91 can be pressed on the printing consumables, so as to facilitate cutting the printing consumables at the main channel 4.

[0036] Example 6

[0037] The same as example 1, different is that the side wall of the housing 1 is further provided with a model cooling fan 10 for blowing and rapidly cooling the model.

[0038] In summary, the above only for the preferred embodiments of the present application, any changes and modifications made in the scope of the present application for patent, should belong to the scope of the present application.

Claims

1. A multi-color print head for a 3D printer, comprising a housing (1) and a print nozzle (2) mounted on the housing (1), characterized in that: The shell (1) is provided with a consumable channel, the consumable channel comprises a plurality of branch channels (3) and a main channel (4), the branch channels (3) are in communication with the main channel (4), the other end of the main channel (4) is connected with the printing nozzle (2) and delivers printing consumables to the printing nozzle (2); further comprising a consumable conveying assembly (5), the printing consumables are connected with the consumable conveying assembly (5) and are driven by the consumable conveying assembly (5) to move in the channel; the consumable conveying assembly (5) comprises a driving wheel connected with a motor, the driving wheel is in contact with the consumables and drives the movement of the consumables; the branch channels (3) are twelve, and the branch channels (3) are uniformly and interval distributed; the main channel (4) and the printing nozzle (2) are further connected with a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation plate (6) and a heat dissipation fan (61), the heat dissipation plate (6) is sleeved on the outer wall of the main channel (4), and the heat dissipation fan (61) is located on one side of the heat dissipation plate (6) and blows air towards the heat dissipation plate (6).

2. The multi-color print head for a 3D printer of claim 1, wherein: Further comprising a heating assembly (7), the heating assembly (7) is sleeved on the outer wall of the main channel (4), and the heating assembly (7) is arranged above the printing nozzle (2) near one end of the printing nozzle (2); the heating assembly (7) comprises a heating rod and a temperature sensor.

3. The multi-color print head for a 3D printer of claim 2, wherein: The heating assembly (7) is further sleeved with a protective sleeve.

4. The multi-color print head for a 3D printer of claim 1, wherein: The shell (1) is further provided with a PCB circuit board; the shell (1) is further provided with a leveling switch (8).

5. The multi-color print head for a 3D printer of claim 1, wherein: Further comprising a cutter (9), one end of the cutter (9) is hinged to the shell (1), and the cutter (9) is provided with a blade (91) for cutting the printing consumables, and the blade (91) is located at the outlet of the main channel (4).

6. The multi-color print head for a 3D printer of claim 1, wherein: A model cooling fan (10) is further installed on the side wall of the shell (1).

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