A cooling device and cooling method for a counter-hedge laboratory 3D printer

Abstract

A cooling device and a cooling method for an opposing laboratory 3D printer, the printer comprising a bracket and a molding base plate, the bracket being fixedly mounted on the upper end surface of the molding base plate, a print head assembly being mounted on the bracket, a workpiece being printed and formed by the print head assembly, the cooling device comprising a bottom cooling assembly and a cooling nozzle, the bottom cooling assembly being arranged opposite to the cooling nozzle, liquid being sprayed on the workpiece by the bottom cooling assembly, and then the liquid on the surface of the workpiece being accelerated to evaporate by the cooling nozzle, thereby effectively improving the cooling efficiency of the printer.

Description

Technical Field

[0001] The invention belongs to the field of 3D printers, and in particular relates to a cooling device and a cooling method for an opposing type laboratory 3D printer. Background Art

[0002] A 3D printer, also known as a three-dimensional printer, is a machine using cumulative manufacturing technology, that is, rapid prototyping technology. It is based on a digital model file and uses special wax materials and powdered metal or plastic and other adhesive materials to print layer by layer of adhesive materials to create three-dimensional objects.

[0003] Patent application number CN201811462659.3 discloses a 3D printer with a heat dissipation function. Aiming at the problem that the heat dissipation components of the existing 3D printers are easily blocked by external dust or debris, the following scheme is proposed, which includes a printer housing, a vertically arranged driving motor is welded to the inner wall of the bottom of the printer housing, the output end of the driving motor is connected to a rotating shaft, and the end of the rotating shaft away from the driving motor is rotatably connected to a horizontally arranged cooling fan, a horizontally arranged mounting plate is welded inside the printer housing, a printer host is arranged on the top of the mounting plate, and heat dissipation windows are arranged on both sides of the printer housing; the 3D printer dissipates heat to the printed workpiece through the cooling fan, the heat dissipation speed through the fan is slow, which is not conducive to rapid cooling, and the fan blowing form is easy to blow the raw materials extruded by the printer head, reducing the accuracy of the print head, which is not conducive to 3D printing. Summary of the invention

[0004] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a cooling method for a counter-pressure laboratory 3D printer cooling device, which is used to quickly cool down the workpiece formed by 3D printing without affecting the printing accuracy.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A cooling device for a counter-hedge laboratory 3D printer, the printer comprising a bracket and a molding seat plate, the bracket being fixedly mounted on the upper end surface of the molding seat plate, a print head assembly being mounted on the bracket, the cooling device comprising a bottom cooling assembly and a cooling nozzle, the bottom cooling assembly being arranged opposite to the cooling nozzle, the bottom cooling assembly being fixedly mounted on the lower end surface of the molding seat plate, a first nozzle being provided on the molding seat plate, the bottom cooling assembly being connected to the first nozzle, the cooling nozzle being fixedly mounted on the print head assembly, and the cooling nozzle being counter-hedge-arranged with the first nozzle; the bottom cooling assembly comprising a container, a spray assembly and a pressurizing assembly, the container being fixedly mounted on the lower end surface of the molding seat plate to form a receiving cavity, liquid being injected into the receiving cavity, the spray assembly being fixedly mounted in the receiving cavity, the pressurizing assembly being fixedly mounted to the container The container is connected to the container so as to pressurize the accommodating chamber; the spray assembly includes a spray pump and a spray head, the spray pump is fixedly installed in the accommodating chamber, the spray head is connected to the spray pump, and the spray pump transports the liquid to the spray head; the pressurizing assembly includes a pressurizing pipe, a check valve and an air pump, the pressurizing pipe is fixedly installed on the side wall of the container, the pressurizing pipe is extended into the container, a check valve is fixedly installed on the extended end of the pressurizing pipe, and the air pump is connected to the pressurizing pipe; liquid spray holes are evenly dug on the forming seat plate, a valve liquid spray part is installed in the liquid spray hole to form a first nozzle, and the liquid spray hole is inclined relative to the vertical plane; the print head assembly includes a print head and a print head moving part for moving the print head, the cooling nozzle is fixedly connected to the side wall of the print head, a cooling hole is provided in the cooling nozzle, an air pipe is connected above the cooling hole, and the air pipe is connected to the air pump.

[0007] Furthermore, the air pump is connected with a reversing valve, which is respectively connected with the air pipe and the pressurizing pipe.

[0008] Furthermore, a waterproof section is provided on the pressure pipe, and the waterproof section is U-shaped.

[0009] The above-mentioned cooling method of the counter-hedge type laboratory 3D printer cooling device comprises the following steps:

[0010] (a) The printer starts working, and the air pump and spray pump start working at the same time;

[0011] (b) The reversing valve operates, so that the air pump is connected to the pressurized pipe, and the valve sprays liquid;

[0012] (c) The reversing valve is switched so that the air pump is connected to the air pipe, and the air pipe blows air to the surface of the printed part.

[0013] Furthermore, the switching time of the reversing valve in step (b) and step (c) is 1-2s.

[0014] The beneficial effect of the present invention is that the workpiece is sprayed with liquid through the bottom cooling component, and the liquid on the surface of the workpiece is accelerated to evaporate through the cooling nozzle, thereby effectively improving the cooling efficiency of the printer. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a cross-sectional view of the present invention.

[0017] Figure numerals: bracket 1, molding seat plate 2, print head assembly 3, bottom cooling assembly 4, cooling nozzle 5, first nozzle 6, container 7, spray assembly 8, pressurizing assembly 9, accommodating chamber 10, spray pump 11, spray head 12, pressurizing pipe 13, check valve 14, air pump 15, waterproof section 16, spray hole 17, valve spray part 19, print head moving part 20, print head 21, cooling hole 22, air pipe 23, reversing valve 24. DETAILED DESCRIPTION

[0018] The practical information is further described below in conjunction with the accompanying drawings.

[0019] A cooling device for a counter-hedge laboratory 3D printer, the printer comprising a bracket 1 and a molding seat plate 2, the bracket 1 being fixedly mounted on the upper end surface of the molding seat plate 2, a print head assembly 3 being mounted on the bracket 1, a workpiece being printed and formed by the print head assembly 3, the cooling device comprising a bottom cooling assembly 4 and a cooling nozzle 5, the bottom cooling assembly 4 being arranged opposite to the cooling nozzle 5, the workpiece being sprayed with liquid by the bottom cooling assembly 4, and then the liquid on the surface of the workpiece being accelerated to evaporate by the cooling nozzle 5, thereby effectively improving the cooling efficiency of the printer, and the bottom cooling The component 4 is fixedly mounted on the lower end surface of the forming base plate 2. The forming base plate 2 is provided with a first nozzle 6. Liquid is sprayed on the workpiece through the first nozzle 6. By spraying the liquid, the cooling speed of the workpiece surface is increased. The bottom cooling component 4 is connected to the first nozzle 6. The cooling nozzle 5 is fixedly mounted on the print head component 3. The cooling nozzle 5 and the first nozzle 6 are arranged opposite to each other, that is, the cooling nozzle 5 is arranged toward the first nozzle 6, and the first nozzle 6 is arranged toward the cooling nozzle 5, so as to prevent the gas blown out by the cooling nozzle 5 from affecting the accuracy of the formed workpiece, thereby ensuring the printing accuracy of the printer.

[0020] The bottom cooling component 4 includes a container 7, a spray component 8 and a pressurizing component 9. The container 7 is fixedly mounted on the lower end surface of the forming seat plate 2 to form a accommodating cavity 10. Liquid is injected into the accommodating cavity 10. The spray component 8 is fixedly mounted in the accommodating cavity 10. The first nozzle 6 is sprayed through the spray component 8. The pressurizing component 9 is fixedly connected to the container 7 to pressurize the accommodating cavity 10 so that the first nozzle 6 sprays liquid intermittently.

[0021] In some preferred embodiments, the liquid is water or alcohol.

[0022] The spray assembly 8 includes a spray pump 11 and a spray head 12. The spray pump 11 is fixedly installed in the accommodating chamber 10. The spray head 12 is connected to the spray pump 11. The spray pump 11 transports liquid to the spray head 12. Preferably, the spray pump 11 is immersed in the liquid to facilitate liquid extraction, and the spray head 12 extends above the liquid to facilitate spraying.

[0023] The pressurizing assembly 9 includes a pressurizing pipe 13, a check valve 14 and an air pump 15. The pressurizing pipe 13 is fixedly installed on the side wall of the container 7. The pressurizing pipe 13 extends into the container 7. A check valve 14 is fixedly installed on the extending end of the pressurizing pipe 13. The check valve 14 prevents liquid from flowing into the pressurizing pipe 13 and preventing the liquid from damaging the air pump 15. The air pump 15 is connected to the pressurizing pipe 13 so that the air pump 15 can pressurize the accommodating chamber 10.

[0024] The pressurized pipe 13 is provided with a waterproof section 16 , which is U-shaped and is used to further prevent the liquid from flowing back into the air pump 15 , thereby further protecting the air pump.

[0025] Spray holes 17 are evenly dug on the forming seat plate 2, and a valve spray component 19 is installed in the spray hole 17 to form a first nozzle 6. Preferably, the structure of the valve spray component 19 is consistent with the conical bottle mouth structure of the "Screaming" beverage bottle, and the spray hole 17 is inclined relative to the vertical plane. Preferably, the angle between the spray hole 17 and the vertical plane is 30°-45°. Furthermore, the opening of the spray hole 17 is set toward the workpiece.

[0026] The spraying principle of the first nozzle 6 is that the spray head 12 sprays to form water droplets on the valve spray component 19. When the air pressure in the accommodating chamber exceeds the bearing range of the valve spray component 19, the valve spray component 19 opens, and the water droplets on the valve spray component 19 are sprayed out. When the valve spray component 19 is opened, the air pressure in the accommodating chamber 10 is relatively large, so the water droplets are blown into smaller droplets and scattered on the surface of the workpiece. On the one hand, the amount of sprayed liquid is reduced to prevent the liquid from remaining on the surface of the workpiece for too long and affecting the surface quality of the workpiece. On the other hand, the sprayed gas can also blow and cool the surface of the workpiece.

[0027] The print head assembly 3 includes a print head moving part 20 for moving the print head 21 and a print head 21. The cooling nozzle 5 is fixedly connected to the side wall of the print head 21. A cooling hole 22 is provided in the cooling nozzle 5. An air pipe 23 is connected above the cooling hole 22. The air pipe 23 is connected to the air pump 15. The air pump blows air to the surface of the workpiece through the cooling hole 22 to accelerate the flow rate of the gas on the surface of the workpiece and improve the cooling efficiency of the workpiece. In addition, the cooling hole 22 is arranged to offset the first nozzle 6 to prevent the cooling hole 22 from directly blowing air to the print head 21, thereby further improving the printing accuracy of the printer.

[0028] The air pump 15 is connected to a reversing valve 24 , which is respectively connected to the air pipe 23 and the pressurizing pipe 13 . Preferably, a timer is provided in the air pump 15 , and the reversing of the reversing valve 24 is controlled by the timer.

[0029] The above-mentioned cooling method of the counter-hedge type laboratory 3D printer cooling device comprises the following steps:

[0030] (a) The printer starts working, and the air pump and spray pump start working at the same time;

[0031] (b) The reversing valve operates, so that the air pump is connected to the pressurized pipe, and the valve sprays liquid;

[0032] (c) The reversing valve is switched so that the air pump is connected to the air pipe, and the air pipe blows air to the surface of the printed part.

[0033] The reversing time of the reversing valve in step (b) and step (c) is 1-2 seconds. The intermittent liquid spraying method is used to prevent residual liquid on the surface of the workpiece, thereby improving the molding accuracy of the workpiece.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0035] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A cooling device for a counter-hedge laboratory 3D printer, the printer comprising a bracket (1) and a molding seat plate (2), the bracket (1) being fixedly mounted on the upper end surface of the molding seat plate (2), a print head assembly (3) being mounted on the bracket (1), characterized in that: The cooling device comprises a bottom cooling component (4) and a cooling nozzle (5), the bottom cooling component (4) and the cooling nozzle (5) are arranged opposite to each other, the bottom cooling component (4) is fixedly mounted on the lower end surface of the molding seat plate (2), a first nozzle (6) is provided on the molding seat plate (2), the bottom cooling component (4) is connected to the first nozzle (6), the cooling nozzle (5) is fixedly mounted on the printing head component (3), and the cooling nozzle (5) and the first nozzle (6) are arranged opposite to each other; The bottom cooling component (4) comprises a container (7), a spray component (8) and a pressurizing component (9); the container (7) is fixedly mounted on the lower end surface of the forming seat plate (2) to form a receiving cavity (10); a liquid is injected into the receiving cavity (10); the spray component (8) is fixedly mounted in the receiving cavity (10); and the pressurizing component (9) is fixedly connected to the container (7) to pressurize the receiving cavity (10); The spray assembly (8) comprises a spray pump (11) and a spray head (12); the spray pump (11) is fixedly mounted in the accommodating chamber (10); the spray head (12) is connected to the spray pump (11); and the spray pump (11) transports liquid into the spray head (12); The pressurizing assembly (9) comprises a pressurizing pipe (13), a check valve (14) and an air pump (15); the pressurizing pipe (13) is fixedly mounted on the side wall of the container (7); the pressurizing pipe (13) extends into the container (7); a check valve (14) is fixedly mounted on the extending end of the pressurizing pipe (13); and the air pump (15) is connected to the pressurizing pipe (13); Liquid spray holes (17) are evenly excavated on the molding seat plate (2), and a valve liquid spray member (19) is installed in the liquid spray hole (17) to form a first spray head (6), and the liquid spray hole (17) is arranged to be inclined relative to the vertical surface; The print head assembly (3) comprises a print head (21) and a print head moving member (20) for moving the print head (21); a cooling nozzle (5) is fixedly connected to a side wall of the print head (21); a cooling hole (22) is provided in the cooling nozzle (5); an air pipe (23) is connected above the cooling hole (22); and the air pipe (23) is connected to an air pump (15); The air pump (15) is connected to a reversing valve (24), which is respectively connected to the air pipe (23) and the pressure pipe (13).

2. The cooling device for a counter-hedge laboratory 3D printer according to claim 1, characterized in that: A waterproof section (16) is provided on the pressure pipe (13), and the waterproof section (16) is U-shaped.

3. A cooling method for a counter-pressure laboratory 3D printer cooling device according to any one of claims 1 to 2, characterized in that: The following steps are included: (a) The printer starts working, and the air pump and spray pump start working at the same time; (b) The reversing valve operates, so that the air pump is connected to the pressurized pipe, and the valve sprays liquid; (c) The reversing valve is switched so that the air pump is connected to the air pipe, and the air pipe blows air to the surface of the printed part.

4. The cooling method of the counter-hedge type laboratory 3D printer cooling device according to claim 3 is characterized in that: The switching time of the reversing valve in step (b) and step (c) is 1-2s.

Images