3D printing plastic melt-blowing device

Abstract

The invention relates to the technical field of 3D printing plastic meltblown devices and plastic molding, the 3D printing plastic meltblown devices comprise a feeding reference block, an air inlet system, a material injection system and a nozzle control system, the air inlet system and the material injection system are both installed on the feeding reference block, the material injection system is provided with a material injection channel and an air inlet channel, the air inlet channel extends to the tail end of the material injection channel, and the nozzle control system is connected with the air inlet channel. The nozzle control system is installed at the tail end of a material injection channel of the material injection system, the nozzle control system comprises a nozzle control reference block and an elastic opening device, a nozzle control channel is formed in the nozzle control reference block, the elastic opening device is installed on the nozzle control reference block in a sliding mode, and the nozzle control channel is communicated with the nozzle control channel. The elastic opening device is arranged around the tail end of the material injection channel and changes the opening angle when the air pressure of the nozzle control channel of the nozzle control system changes, and the spraying density of all positions of the vamp can be rapidly changed.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, and in particular to a 3D printing plastic meltblower. Background Art

[0002] ‌‌Shoe 3D printer‌ is a device that uses 3D printing technology to manufacture shoes. It is efficient, flexible and personalized. Designers use CAD software to design the three-dimensional model of the shoe and transmit the model information to the printer. The printer extrude or deposits the material layer by layer through a high-precision nozzle to eventually form a complete shoe. After printing, post-processing work such as trimming, such as polishing, coloring, etc., is performed to complete the final product.

[0003] Shoe 3D printing can customize unique shoes according to the customer's foot shape, size and preferences, meet the personalized needs of consumers, shorten the development cycle, and 3D printing can form uppers of any shape in one piece, which is suitable for the design and innovation of complex structures.

[0004] When making shoes with hollow uppers, in order to ensure the strength of the side of the upper, the side of the upper needs to be strengthened, while the top of the upper needs to be sparse for breathability because there is no strength requirement. Existing 3D printing shoe machines often extrude filamentary materials for printing during printing. The diameter of the filamentary materials cannot be changed. When printing different positions of the upper, it is necessary to slowly carve. The printing speed is slow, and it cannot be quickly adjusted to the different breathability requirements of various positions on the upper. It cannot flexibly switch between different printing densities, and it is difficult to quickly make uppers with different breathability performance in different places. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides a 3D printing plastic melt-blown device, which can quickly change the spraying density of various parts of the shoe upper.

[0006] The technical solution adopted by the present invention is: A 3D printing plastic meltblower comprises a feeding reference block, an air intake system, an injection system and a nozzle control system, wherein the air intake system and the injection system are both mounted on the feeding reference block, the injection system comprises an injection channel and an air intake channel, the air intake channel extends to the end of the injection channel, the nozzle control system is mounted on the end of the injection channel of the injection system, the nozzle control system comprises a nozzle control reference block and an elastic opening device, the nozzle control reference block is provided with a nozzle control channel, the elastic opening device is slidably mounted on the nozzle control reference block, the elastic opening device is arranged around the end of the injection channel, and the nozzle control system changes the opening angle of the elastic opening device when the air pressure in the nozzle control channel changes.

[0007] Preferably, a plurality of injection holes are provided at the end of the injection channel.

[0008] Preferably, the air intake system is provided with an air intake control device, and the air intake control device includes an air intake control rod, and the air intake control rod extends into the air intake passage to control the opening of the air intake passage.

[0009] Preferably, the injection system is provided with an injection control device, an injection distribution cone block, a nozzle mounting block and an injection reference block, the injection distribution cone block and the nozzle mounting block are both mounted on the injection reference block, an air intake gap connected to the air intake channel is formed between the injection distribution cone block and the nozzle mounting block, the injection channel is located in the injection distribution cone block, and the injection control device includes an injection control rod, which extends into the injection channel to control the opening of the injection channel.

[0010] Preferably, the upper end of the injection control rod is provided with a threaded section, the bottom of the injection control rod has a tapered section, the bottom of the injection channel is adapted to the tapered section, and the threaded section and the injection reference block are installed through a threaded pair.

[0011] Preferably, the elastic opening device includes a plurality of distribution tubes and a plurality of return springs, the distribution tubes are sequentially sleeved, the distribution tubes sequentially become longer from the inside to the outside, the innermost distribution tube is installed in the distribution nozzle control reference block, and the return springs are sequentially connected to the distribution tubes.

[0012] Preferably, each of the distribution pipes is provided with a distribution air guide hole.

[0013] Preferably, the inner diameter of the innermost distribution pipe is larger than the diameter of the end of the injection channel.

[0014] The beneficial effects of the present invention are: The air intake system and the injection system are both installed on the feeding reference block. The injection system has an injection channel and an air intake channel. The air intake channel extends to the end of the injection channel, and then the air intake channel ejects the extruded molten material at the end of the injection channel. The nozzle control system is installed on the end of the injection channel of the injection system. The nozzle control system includes a nozzle control reference block and an elastic opening device. The nozzle control reference block is provided with a nozzle control channel. The elastic opening device can be slidably installed on the nozzle control reference block. The elastic opening device is arranged around the end of the injection channel. When the air pressure in the nozzle control channel changes, the elastic opening device of the nozzle control system changes the opening angle, thereby changing the spreading area of ​​the ejected molten material, changing the material density of the upper molding, and then quickly changing the spraying density of various parts of the upper. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the nozzle control system structure.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram at point A in the middle.

[0018] Figure 4 Schematic diagram of the location of the injection channel and the air intake channel.

[0019] Description of reference numerals: 1. Loading reference block; 2. Air intake system; 3. Injection system; 31. Injection channel; 311. Injection hole; 32. Air intake channel; 321. Air intake slit; 33. Injection distribution cone block; 34. Nozzle mounting block; 35. Injection reference block; 4. Nozzle control system; 41. Nozzle control reference block; 411. Nozzle control channel; 42. Elastic opening device; 421. Distribution pipe; 4211. Distribution air guide hole; 4212. Trumpet-shaped silicone ring; 422. Return spring; 5. Injection control device; 51. Injection control lever; 6. Air intake control device. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 — Figure 4 As shown, the present embodiment provides a 3D printing plastic meltblower, including a feeding reference block 1, an air intake system 2, an injection system 3 and a nozzle control system 4, the air intake system 2 and the injection system 3 are both installed on the feeding reference block 1, the injection system 3 has an injection channel 31 and an air intake channel 32, the air intake channel 32 extends to the end of the injection channel 31, and then the air intake channel 32 carries the extruded molten material at the end of the injection channel 31 and ejects it, that is, after the molten material is extruded from the injection channel 31, it will encounter the airflow ejected from the air intake channel 32, and enter to make the molten material atomized and ejected, and the nozzle control system 4 is installed in the injection system 3. At the end of the injection channel 31, the nozzle control system 4 includes a nozzle control reference block 41 and an elastic opening device 42. The nozzle control reference block 41 is provided with a nozzle control channel 411. The elastic opening device 42 can be slidably installed on the nozzle control reference block 41. The elastic opening device 42 is arranged around the end of the injection channel 31. When the air pressure in the nozzle control channel 411 changes, the elastic opening device 42 of the nozzle control system 4 changes the opening angle, thereby changing the spreading area of ​​the ejected molten material, changing the material density of the upper molding, and then quickly changing the spraying density of various parts of the upper, thereby quickly controlling the density of various parts of the upper molding.

[0021] Specifically, a plurality of injection holes 311 are provided at the end of the injection channel 31, so that the molten material produces a plurality of filamentary effects when being ejected, so that the airflow introduced from the air inlet channel 32 can eject the filamentary material squeezed out of the injection holes 311, thereby ensuring the air permeability of the upper.

[0022] Specifically, the air intake system 2 is provided with an air intake control device 6, and the air intake control device 6 includes an air intake control rod. The air intake control rod is connected to the air intake system 2 through a threaded pair transmission. The air intake control rod extends into the air intake channel 32 and then controls the opening of the air intake channel 32 by rotating the air intake control rod, controls the air flow speed, and controls the speed at which the filamentary material is ejected. Please note that under the condition of the same flow rate of the molten material, the larger the opening of the air intake channel 32, the finer the ejection diameter of the filamentary material can be controlled.

[0023] Specifically, the injection system 3 is provided with an injection control device 5, an injection distribution cone block 33, a nozzle mounting block 34 and an injection reference block 35. The injection distribution cone block 33 and the nozzle mounting block 34 are both mounted on the injection reference block 35 by bolts (please note that Figure 3 In order to enlarge the view, the injection reference block 35 is partially cut away, so Figure 3 The injection reference block 35 only shows the part close to the injection distribution cone block 33), an air inlet slit 321 connected to the air inlet channel 32 is formed between the injection distribution cone block 33 and the nozzle mounting block 34, the injection channel 31 is located in the injection distribution cone block 33, and the gas ejected from the air inlet slit 321 passes through the injection hole 311 at the end of the injection channel 31, and then carries the filamentary material out, the injection control device 5 includes an injection control rod 51, the injection control rod 51 extends into the injection channel 31 to control the opening of the injection channel 31, and controls the ejection speed of the molten material.

[0024] Specifically, a threaded section is provided at the upper end of the injection control rod 51, and a tapered section is provided at the bottom of the injection control rod 51. The bottom of the injection channel 31 is adapted to the tapered section. The threaded section and the injection reference block 35 are installed through a threaded pair to realize manual control of the opening of the injection channel 31. Please note that the different openings of the injection channel 31 determine the flow rate of the molten material.

[0025] Specifically, the elastic opening device 42 includes a plurality of distribution tubes 421 and a plurality of return springs 422. The distribution tubes 421 are sequentially sleeved, and the distribution tubes 421 are sequentially lengthened from the inside to the outside. The innermost distribution tube 421 is installed on the lower side of the nozzle mounting block 34. The return spring 422 is sequentially connected to the distribution tubes 421 through screws. The return spring 422 is an elastic silicone sheet, thereby realizing the elastic sliding of each distribution tube 421. When the air pressure in the nozzle control channel 411 changes, each distribution tube 421 overcomes the elastic force of the return spring 422 and slides with each other, thereby changing the opening angle of the elastic opening device 42, realizing the change of the spraying range, thereby realizing the rapid change of the spraying range and the change of the density of the sprayed molten material, thereby quickly controlling the density of the material sprayed to various parts of the shoe upper when printing the shoe upper.

[0026] That is to say, when the air pressure in the nozzle control channel 411 changes, due to the mutual sliding of the distribution pipes 421, the bottom edge of each distribution pipe 421 forms a trumpet-shaped opening that can change the opening angle, thereby controlling the area of ​​the sprayed material dispersion area, and then quickly controlling the density of the sprayed material, and finally producing the effect of quickly controlling the printing density of the shoe upper. In order to avoid interference between the airflow in the nozzle control channel 411 and the airflow between the air inlet slit 321, a trumpet-shaped silicone ring 4212 pressed against the nozzle mounting block 34 is provided at the position of the innermost distribution pipe 421 through a conventional clip-on method, thereby achieving isolation of the airflow in the nozzle control channel 411 and the airflow between the air inlet slit 321 without affecting the lifting and lowering of each distribution pipe 421.

[0027] Specifically, each distribution tube 421 is provided with a distribution air guide hole 4211. The airflow ejected from the distribution air guide hole 4211 will push the filamentary material ejected from the injection hole 311 away from the distribution tube 421, preventing the material from sticking to the distribution tube 421. The inner diameter of the innermost distribution tube 421 is larger than the diameter of the end of the injection channel 31, further preventing the filamentary material from sticking.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. 3D printing plastic meltblower, characterized in that, It includes a loading reference block, an air intake system, an injection system and a nozzle control system, wherein the air intake system and the injection system are both installed on the loading reference block, the injection system has an injection channel and an air intake channel, the air intake channel extends to the end of the injection channel, the nozzle control system is installed on the end of the injection channel of the injection system, the nozzle control system includes a nozzle control reference block and an elastic opening device, the nozzle control reference block is provided with a nozzle control channel, the elastic opening device can be slidably installed on the nozzle control reference block, the elastic opening device is arranged around the end of the injection channel, and the nozzle control system changes the opening angle of the elastic opening device when the air pressure in the nozzle control channel changes.

2. The 3D printing plastic meltblower according to claim 1, characterized in that: A plurality of injection holes are arranged at the end of the injection channel.

3. The 3D printing plastic meltblower according to claim 1, characterized in that: The air intake system is provided with an air intake control device, and the air intake control device includes an air intake control rod, and the air intake control rod extends into the air intake passage to control the opening of the air intake passage.

4. The 3D printing plastic meltblower according to claim 1, characterized in that: The injection system is provided with an injection control device, an injection distribution cone block, a nozzle mounting block and an injection reference block. The injection distribution cone block and the nozzle mounting block are both mounted on the injection reference block. An air intake gap connected to an air intake channel is formed between the injection distribution cone block and the nozzle mounting block. The injection channel is located in the injection distribution cone block. The injection control device includes an injection control rod, which extends into the injection channel to control the opening of the injection channel.

5. The 3D printing plastic meltblower according to claim 4, characterized in that: The upper end of the injection control rod is provided with a threaded section, the bottom of the injection control rod has a tapered section, the bottom of the injection channel is adapted to the tapered section, and the threaded section and the injection reference block are installed through a threaded pair.

6. The 3D printing plastic meltblower according to claim 1, characterized in that: The elastic opening device includes a plurality of distribution tubes and a plurality of return springs. The distribution tubes are sleeved in sequence, and the distribution tubes are lengthened from the inside to the outside. The innermost distribution tube is installed in the distribution nozzle control reference block, and the return springs are connected to the distribution tubes in sequence.

7. The 3D printing plastic meltblower according to claim 6, characterized in that: Each of the distribution pipes is provided with a distribution air guide hole.

8. The 3D printing plastic meltblower according to claim 6, characterized in that: The inner diameter of the innermost distribution pipe is larger than the diameter of the end of the injection channel.

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