3D Printed Plastic Melt Blower

Abstract

The present invention relates to a 3D printing plastic melt sprayer, belonging to the technical field of plastic molding, which includes a feeding reference block, an air intake system, a material injection system, and a nozzle control system. The air intake system and the material injection system are both installed on the feeding reference block. The material injection system has a material injection channel and an air intake channel, and the air intake channel extends to the end of the material injection channel. The nozzle control system is installed at the end of the material injection channel of the material 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 is slidably installed on the nozzle control reference block and is arranged around the end of the material 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, and can quickly change the spraying density at various parts of the shoe upper.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molding, and particularly to a 3D printing plastic melt sprayer. Background Art

[0002] A shoe 3D printer is a device that uses 3D printing technology to manufacture shoes, which has the characteristics of high efficiency, flexibility and personalization. Designers use CAD software to design the three-dimensional model of the shoes, transmit the model information to the printer, and the printer extrudes or deposits materials layer by layer through a high-precision nozzle, and finally forms a complete shoe. After printing, post-processing work such as trimming is carried out, such as sanding, coloring, etc., 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, and shorten the development cycle. 3D printing can integrally form shoe uppers of any shape and is suitable for the design and innovation of complex structures.

[0004] When making shoes with a hollowed-out upper, in order to ensure the strength of the side of the upper, the side of the upper needs to be strengthened. Since there is no strength requirement for the top surface of the upper and for ventilation needs, the top surface of the upper needs to be made sparse. When the existing 3D printing shoe machines print, they often extrude filamentous materials for printing. The diameter of the filamentous materials cannot change. When printing different positions of the shoe upper, it is necessary to slowly engrave, the printing speed is slow, it cannot quickly adjust according to the different ventilation requirements of different positions of the shoe upper, and it cannot flexibly switch between different printing densities, making it difficult to quickly produce shoe uppers with different ventilation performances in different places. Summary of the Invention

[0005] To overcome the technical defects existing in the prior art, the present invention provides a 3D printing plastic melt sprayer that can quickly change the spraying density at different positions of the shoe upper.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A 3D printing plastic melt sprayer includes a feeding reference block, an air intake system, a material injection system and a nozzle control system. The air intake system and the material injection system are both installed on the feeding reference block. The material injection system has a material injection channel and an air intake channel, and the air intake channel extends to the end of the material injection channel. The nozzle control system is installed at the end of the material injection channel of the material 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 is slidably installed on the nozzle control reference block. The elastic opening device surrounds the end of the material injection channel. The nozzle control system changes the opening angle of the elastic opening device when the air pressure in the nozzle control channel changes.

[0008] Preferably, a number of injection holes are provided at the end of the injection material channel.

[0009] Preferably, an air intake control device is provided on the air intake system. The air intake control device includes an air intake control rod which extends into the air intake channel to control the opening degree of the air intake channel.

[0010] Preferably, an injection material control device, an injection material distribution pusher block, a nozzle mounting block and an injection material reference block are provided on the injection material system. The injection material distribution pusher block and the nozzle mounting block are both mounted on the injection material reference block. An air intake slit communicating with the air intake channel is formed between the injection material distribution pusher block and the nozzle mounting block. The injection material channel is located within the injection material distribution pusher block. The injection material control device includes an injection material control rod which extends into the injection material channel to control the opening degree of the injection material channel.

[0011] Preferably, a threaded section is provided at the upper end of the injection material control rod. The bottom of the injection material control rod has a tapered section. The bottom of the injection material channel is adapted to the tapered section. The threaded section and the injection material reference block are mounted through a thread pair.

[0012] Preferably, the elastic opening device includes a number of distribution pipes and a number of return springs. The distribution pipes are sleeved in sequence. The distribution pipes become longer in sequence from the inside to the outside. The innermost distribution pipe is mounted within the distribution nozzle control reference block. The return springs connect the distribution pipes in sequence.

[0013] Preferably, each of the distribution pipes is provided with a distribution air guide hole.

[0014] Preferably, the inner diameter of the innermost distribution pipe is larger than the diameter of the end of the injection material channel.

[0015] The beneficial effects of the present invention are as follows:

[0016] The air intake system and the injection material system are both mounted on the feeding reference block. The injection material system has an injection material channel and an air intake channel. The air intake channel extends to the end of the injection material channel. Thus, the air intake channel ejects the extruded molten material at the end of the injection material channel. The nozzle control system is mounted at the end of the injection material channel of the injection material system. The nozzle control system includes a nozzle control reference block and an elastic opening device. A nozzle control channel is provided on the nozzle control reference block. The elastic opening device is slidably mounted on the nozzle control reference block. The elastic opening device is disposed around the end of the injection material channel. When the air pressure in the nozzle control channel changes, the elastic opening device changes the opening angle, thus changing the spreading area of the ejected molten material and changing the material density of the shoe upper forming, and further quickly changing the spraying density at various parts of the shoe upper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the nozzle control system.

[0019] Figure 3 is Figure 2 the enlarged schematic diagram at position A in

[0020] Figure 4 It is a schematic diagram of the positions of the injection channel and the air inlet channel.

[0021] Description of the reference numerals in the drawings:

[0022] 1. Loading reference block;

[0023] 2. Air inlet system;

[0024] 3. Injection system; 31. Injection channel; 311. Injection hole; 32. Air inlet channel; 321. Air inlet slit; 33. Injection distribution pusher block; 34. Nozzle mounting block; 35. Injection reference block;

[0025] 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. Flared silica gel ring; 422. Return spring;

[0026] 5. Injection control device; 51. Injection control rod;

[0027] 6. Air inlet control device. Detailed implementation manners

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] Such as Figure 1 — Figure 4As 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.

[0030] 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.

[0031] 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.

[0032] 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 3The charging reference block 35 (only a part thereof near the charging distribution cone block 33 is shown). An air inlet slit 321 communicating with the air inlet passage 32 is formed between the charging distribution cone block 33 and the nozzle mounting block 34. The charging passage 31 is located within the charging distribution cone block 33. After the gas ejected from the air inlet slit 321 passes through the ejection hole 311 at the end of the charging passage 31, the filamentous material is carried and ejected. The charging control device 5 includes a charging control rod 51. The charging control rod 51 extends into the charging passage 31 to control the opening degree of the charging passage 31 and thus control the ejection speed of the molten material.

[0033] Specifically, the upper end of the charging control rod 51 is provided with a threaded section, and the bottom of the charging control rod 51 has a tapered section. The bottom of the charging passage 31 is adapted to the tapered section. The threaded section and the charging reference block 35 are installed through a thread pair to manually control the opening degree of the charging passage 31. Note that different opening degrees of the charging passage 31 determine the flow rate of the molten material.

[0034] Specifically, the elastic opening device 42 includes a plurality of distribution pipes 421 and a plurality of return springs 422. The distribution pipes 421 are sleeved in sequence, and the distribution pipes 421 become longer in sequence from inside to outside. The innermost distribution pipe 421 is installed on the lower side of the nozzle mounting block 34. The return springs 422 connect the distribution pipes 421 through screws in sequence. The return springs 422 are elastic silica gel sheets, so as to achieve the elastic sliding of the distribution pipes 421. When the air pressure in the nozzle control passage 411 changes, the distribution pipes 421 overcome the elastic force of the return springs 422 to achieve mutual sliding, thereby changing the opening angle of the elastic opening device 42, achieving the change of the ejection range, and further achieving the rapid change of the ejection range and the change of the density of the ejected molten material, so as to rapidly control the density of the material sprayed onto various parts of the shoe upper during shoe upper printing.

[0035] That is to say, when the air pressure in the nozzle control passage 411 changes, due to the mutual sliding of the distribution pipes 421, a trumpet-shaped opening with a variable opening angle is formed at the bottom edge of each distribution pipe 421, thereby controlling the area of the ejected material dispersion area, and further rapidly controlling the density of the ejected material, and finally achieving the effect of rapidly controlling the printing density of the shoe upper. In order to avoid interference between the air flow in the nozzle control passage 411 and the air flow in the air inlet slit 321, a trumpet-shaped silica gel ring 4212 that presses against the nozzle mounting block 34 is provided at the position of the innermost distribution pipe 421 through a conventional clamping method, so as to isolate the air flow in the nozzle control passage 411 and the air flow in the air inlet slit 321 without affecting the lifting of each distribution pipe 421.

[0036] Specifically, each distribution pipe 421 is provided with a distribution air guide hole 4211. The airflow ejected from the distribution air guide hole 4211 pushes the filamentous material ejected from the ejection hole 311 away from the distribution pipe 421, preventing the material from adhering to the distribution pipe 421. The inner diameter of the innermost distribution pipe 421 is larger than the diameter of the end of the injection channel 31, further preventing the filamentous material from adhering.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. 3D printing plastic meltblower, characterized in that, The invention 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 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, the nozzle control system is installed 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 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 is arranged at the nozzle When the air pressure in the control channel changes, the elastic opening device changes the opening angle. The elastic opening device includes a plurality of distribution tubes and a plurality of return springs. The distribution tubes are sequentially sleeved, and the distribution tubes are sequentially lengthened from the inside to the outside. The bottom edge of each distribution tube forms a trumpet-shaped opening that is narrow at the top and wide at the bottom. The outermost distribution tube is installed on the nozzle control reference block. The return springs are sequentially connected to the distribution tubes. Each distribution tube is provided with a distribution air guide hole. The airflow ejected from the distribution air guide hole pushes the material away from the distribution tube to prevent the material from sticking to the distribution tube. The inner diameter of the innermost distribution tube is larger than the diameter of the end of the injection channel.

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.

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