Sheath gas wrapping type material jet printing nozzle

Abstract

The utility model relates to the technical field of jet printing, and provides a sheath gas wrapping type material jet printing spray head which comprises a spray pipe body, the bottom of the spray pipe body is communicated with a mixing spray head, the top of the spray pipe body is fixedly connected with a top plate, and the bottom of the top plate is communicated with a main machine shell. A plurality of fixing rods are fixedly connected to the inner surface of the main case, a fixing plate is fixedly connected to the ends, away from the main case, of the fixing rods, a limiting rod is fixedly connected to the bottom of the fixing plate, an anti-falling plate is fixedly connected to the bottom of the limiting rod, and a plurality of stress grooves are formed in the outer side of the main case. And the outer surface of the limiting rod is movably sleeved with a limiting sleeve. According to the utility model, the device is provided with the discharge flow rate adjusting structure, the deposition amount of the material can be controlled, so that the amount of the printing material sprayed out of the spray head can be accurately controlled, the printing is more uniform, the phenomenon of local material accumulation or insufficiency is avoided, and the appearance quality and the performance stability of a printed piece are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of jet printing, especially to a sheath gas wrapped material jet printing nozzle. BACKGROUND

[0002] The sheath gas wrapped material jet printing nozzle has the following important functions: it allows gas to form a uniform wrapping layer around the printing material, making the material more stable during ejection from the nozzle. This helps to ensure that the size and shape of the droplets are more consistent, thereby improving the accuracy and resolution of the printing, and forms a protective barrier around the material to prevent it from reacting with oxygen, moisture and other substances in the air during the ejection process, thereby reducing oxidation and contamination of the material.

[0003] However, the prior art such as Chinese Patent No. CN111469399B, "3D printing nozzle", relates to the field of 3D printing technology, specifically to a 3D printing nozzle, which includes a body with a first feeding cavity inside, a first feeding port is provided on the side wall of the body; a first piston plate is provided in the first feeding cavity; a nozzle is connected to the first piston plate at one end and can extend out of the body at the other end; a piston assembly is slidably arranged in the first feeding cavity and forms a sealed second feeding cavity with the first piston plate, the nozzle communicates with the second feeding cavity, the side wall of the piston assembly is provided with a second feeding port matched with the first feeding port, and the piston assembly is driven by the driving assembly to move in the first feeding cavity, so that the first feeding port and the second feeding port are coincident or staggered, and the distance between the piston assembly and the first piston plate increases when the first feeding port and the second feeding port are staggered.

[0004] However, this device does not have a discharge flow rate adjusting structure, which cannot control the amount of material deposited, thereby accurately controlling the amount of printing material ejected from the nozzle, and the printing is not uniform enough, resulting in the phenomenon of local material accumulation or deficiency, which reduces the appearance quality and performance stability of the printed part, and does not have a one-way gas passing structure, which cannot effectively prevent the backflow of sheath gas at inappropriate times, which may cause unstable material ejection, irregular droplet shape, and gas leakage. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the problem in the prior art that the amount of material deposited cannot be controlled, thereby accurately controlling the amount of printing material ejected from the nozzle, and the printing is not uniform enough, resulting in the phenomenon of local material accumulation or deficiency, which reduces the appearance quality and performance stability of the printed part, and cannot effectively prevent the backflow of sheath gas at inappropriate times, which may cause unstable material ejection, irregular droplet shape, and gas leakage.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a sheath gas package formula material jet printing nozzle, including the spray pipe main part, the bottom of spray pipe main part is connected with the mixed spray head, the top of spray pipe main part is fixedly connected with the top board, the bottom of top board is connected with the main machine shell, the inner surface of main machine shell is fixedly connected with a plurality of fixed links, the one end of a plurality of fixed links is fixedly connected with the fixed plate that is away from the main machine shell, the bottom of fixed plate is fixedly connected with the limiting rod, the bottom of limiting rod is fixedly connected with the anti -drop board, the outside of main machine shell is provided with a plurality of stress grooves, the outer surface of limiting rod is movably sleeved with the limiting sleeve, limiting rod is fixed through fixed link and fixed plate, and the anti -drop board below limiting rod can prevent the limiting sleeve from separating from the limiting rod.

[0007] As a preferred implementation, the outer surface of the limiting sleeve is fixedly connected with a plurality of first shaft plates, the outer surface of the first shaft plate is rotatably connected with two connecting rods, and the limiting sleeve will drive one end of the connecting rod when moving down through the first shaft plate.

[0008] As a preferred implementation, the one end of the two connecting rods away from the first shaft plate is rotatably connected with a second shaft plate, the inner surface of the main machine shell is fixedly connected with a plurality of second shaft plates away from the connecting rod, and the other end of the connecting rod will pull the inner wall of the main machine shell through the second shaft plate. Because the outside of the main machine shell is provided with a plurality of stress grooves, when the inner wall is pushed, the lower opening of the main machine shell will shrink inward.

[0009] As a preferred implementation, the outer surface of the main machine shell is fixedly connected with a plurality of flow guide blocks, and the inner surface of the spray pipe main part is fixedly embedded with a flow guide ring. The sheath gas flows through the gap between the flow guide block and the flow guide ring.

[0010] As a preferred implementation, the top of the top plate is connected with a plurality of air inlet pipes, and the top of the top plate is fixedly connected with a feeding pipe. The sheath gas pipe is connected to the air inlet pipe.

[0011] As a preferred implementation, the inner surface of the air inlet pipe is fixedly embedded with a valve cylinder, and the inside of the valve cylinder is movably embedded with a plurality of valve rods. When the sheath gas enters through the air inlet pipe, it will push the valve plate and the valve rod after passing through the valve cylinder.

[0012] As a preferred implementation, the bottom of the plurality of valve rods is fixedly connected with a valve plate, and the top of the valve rod is fixedly connected with a stress plate. The valve rod and the stress plate will move with the valve plate.

[0013] As a preferred implementation, the outer surface of the valve rod is movably sleeved with a spring, the bottom of the plurality of springs is fixedly connected to the top of the valve cylinder, and the top of the spring is fixedly connected to the bottom of the stress plate. When the sheath gas enters through the air inlet pipe, it will push the valve plate and the valve rod after passing through the valve cylinder, and the stress plate will extrude the spring inside.

[0014] Compared with the prior art, the utility model has the advantages and positive effects that:

[0015] 1、 the utility model discloses, device sets up the discharge flow rate adjusting structure, can control material depositing amount, thereby accurate control printing material from the amount of ejection of nozzle, print more evenly, avoid appearing local material accumulation or the phenomenon of deficiency, improved the appearance quality and performance stability of printing piece.

[0016] 2、 the utility model discloses, device sets up gas one-way through structure, can effectively prevent sheath gas from countercurrent inappropriately, avoided the material injection unstable, droplet form irregular that possibly caused because of gas countercurrent, will not cause gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a kind of sheath gas wrapped formula material injection printing nozzle's three-dimensional structure schematic diagram provided in the utility model;

[0018] Figure 2 It is the cross-sectional structure schematic diagram of nozzle main body in a kind of sheath gas wrapped formula material injection printing nozzle provided in the utility model;

[0019] Figure 3 It is the cross-sectional structure schematic diagram of main casing in a kind of sheath gas wrapped formula material injection printing nozzle provided in the utility model;

[0020] Figure 4 It is the cross-sectional structure schematic diagram of gas inlet pipe in a kind of sheath gas wrapped formula material injection printing nozzle provided in the utility model;

[0021] Figure 5 It is the cross-sectional structure schematic diagram of a kind of sheath gas wrapped formula material injection printing nozzle provided in the utility model; Figure 3 The enlarged structure schematic diagram of A in it.

[0022] Legend:

[0023] 1, nozzle main body;2, mixed nozzle;3, top plate;4, main casing;5, fixed rod;6, fixed plate;7, limit rod;8, anti-drop plate;9, stress groove;10, limit sleeve;11, first shaft plate;12, connecting rod;13, second shaft plate;14, flow guide block;15, flow guide ring;16, gas inlet pipe;17, feed pipe;18, valve barrel;19, valve rod;20, valve plate;21, stress plate;22, spring. DETAILED DESCRIPTION

[0024] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, and is not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of the utility model protection.

[0025] Please refer to Figures 1 to 5 The utility model provides a kind of technical scheme: a sheath gas wrapped material jet printing nozzle, including spray pipe main body 1, the bottom of spray pipe main body 1 is communicated with mixed nozzle 2, the top of spray pipe main body 1 is fixedly connected with top plate 3, the bottom of top plate 3 is communicated with main machine shell 4, the inner surface of main machine shell 4 is fixedly connected with multiple fixed rods 5, the end of multiple fixed rods 5 away from main machine shell 4 is fixedly connected with fixed plate 6, the bottom of fixed plate 6 is fixedly connected with limiting rod 7, the bottom of limiting rod 7 is fixedly connected with anti-off plate 8, multiple stress grooves 9 are arranged on the outside of main machine shell 4, limiting sleeve 10 is movably sleeved on the outer surface of limiting rod 7, material is passed through limiting sleeve 10 when entering main machine shell 4, so that limiting sleeve 10 moves downwards along limiting rod 7.

[0026] As Figures 1 to 5 Indicated, the outer surface of limiting sleeve 10 is fixedly connected with multiple first shaft plates 11, the outer surface of first shaft plate 11 is rotatably connected with two connecting rods 12, limiting sleeve 10 is passed when moving downwards one end of connecting rod 12 is driven by first shaft plate 11.

[0027] As Figures 1 to 5 Indicated, the end of two connecting rods 12 away from first shaft plate 11 is rotatably connected with second shaft plate 13, multiple second shaft plates 13 are fixedly connected on the inner surface of main machine shell 4 away from connecting rod 12, the other end of connecting rod 12 is pulled by the inner wall of main machine shell 4 through second shaft plate 13.

[0028] As Figures 1 to 5 Indicated, the outer surface of main machine shell 4 is fixedly connected with multiple flow guide blocks 14, the inner surface of spray pipe main body 1 is fixedly embedded with flow guide ring 15, the lower opening of main machine shell 4 is inwards contracted, so that material flow rate slows down, the gap between flow guide block 14 and flow guide ring 15 is larger, so that material and sheath gas flow rate is kept balanced again.

[0029] As Figures 1 to 5 Indicated, the top of top plate 3 is communicated with multiple air inlet pipes 16, the top of top plate 3 is fixedly connected with feed pipe 17, and the spray material pipe is connected into feed pipe 17.

[0030] As Figures 1 to 5As shown, a valve cylinder 18 is fixedly embedded on the inner surface of the air intake pipe 16, and multiple valve stems 19 are movably embedded inside the valve cylinder 18. When the sheath gas enters through the air intake pipe 16, it will push the valve plate 20 and the valve stems 19 after passing through the valve cylinder 18.

[0031] like Figures 1 to 5 As shown, valve plates 20 are fixedly connected to the bottom of multiple valve stems 19, and force plates 21 are fixedly connected to the top of the valve stems 19. The valve stems 19 and force plates 21 will move along with the valve plates 20.

[0032] like Figures 1 to 5 As shown, a spring 22 is movably sleeved on the outer surface of the valve stem 19. The bottom of multiple springs 22 is fixedly connected to the top of the valve cylinder 18, and the top of the springs 22 is fixedly connected to the bottom of the force plate 21. The force plate 21 compresses the internal springs 22. The springs 22 have elastic potential energy, so that when no gas flows in, the valve plate 20 and the valve cylinder 18 remain closed, thereby preventing gas backflow.

[0033] Working principle: First, the spray material pipe is connected to the feed pipe 17, and the sheath gas pipe is connected to the air inlet pipe 16. The sheath gas flows through the gap between the guide block 14 and the guide ring 15. The material passes through the top plate 3 and the main housing 4, and is surrounded by sheath gas at the main body of the spray nozzle 1. Finally, it is sprayed out through the mixing nozzle 2 and performs the coating operation. When the material flow rate is too high and the material and sheath gas cannot be mixed evenly, the material will pass through the limiting sleeve 10 when entering the main housing 4, causing the limiting sleeve 10 to move downward along the limiting rod 7. The limiting rod 7 is fixed by the fixing rod 5 and the fixing plate 6. The anti-detachment plate 8 below the limiting rod 7 can prevent the limiting sleeve 10 from detaching from the limiting rod 7. When the limiting sleeve 10 moves downward, it will pass through the first shaft plate 11. One end of the connecting rod 12 is driven, and the other end of the connecting rod 12 will pull the inner wall of the main housing 4 through the second shaft plate 13. Because multiple stress grooves 9 are opened on the outer side of the main housing 4, when the inner wall is pushed, the lower opening of the main housing 4 will shrink inward, which slows down the material flow rate and increases the gap between the guide block 14 and the guide ring 15, so that the material and sheath gas flow rates are balanced again. When the sheath gas enters through the air inlet pipe 16, it will push the valve plate 20 and the valve stem 19 after passing through the valve cylinder 18, and cause the force plate 21 to squeeze the internal spring 22. The spring 22 has elastic potential energy, so that when there is no gas inflow, the valve plate 20 and the valve cylinder 18 remain closed, thereby preventing gas backflow.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A sheath gas encapsulated material-jet printing head comprising a jet tube body (1), characterized in that, The bottom of the nozzle body (1) is communicated with a mixing nozzle (2), the top of the nozzle body (1) is fixedly connected with a top plate (3), the bottom of the top plate (3) is communicated with a main shell (4), the inner surface of the main shell (4) is fixedly connected with a plurality of fixed rods (5), the ends of the plurality of fixed rods (5) away from the main shell (4) are fixedly connected with a fixed plate (6), the bottom of the fixed plate (6) is fixedly connected with a limiting rod (7), the bottom of the limiting rod (7) is fixedly connected with an anti-dropping plate (8), the outer side of the main shell (4) is provided with a plurality of stress grooves (9), and the outer surface of the limiting rod (7) is movably sleeved with a limiting sleeve (10).

2. The sheath air wrapped material jet printing head of claim 1, wherein: The outer surface of the limiting sleeve (10) is fixedly connected with a plurality of first shaft plates (11), and the outer surface of the first shaft plate (11) is rotatably connected with two connecting rods (12).

3. A sheath air wrapped material jet printing head according to claim 2, wherein: The ends of the two connecting rods (12) away from the first shaft plate (11) are rotatably connected with a second shaft plate (13), and the inner surface of the main shell (4) is fixedly connected with a plurality of second shaft plates (13) away from the connecting rod (12).

4. The sheath air wrapped material jet printing head of claim 1, wherein: The outer surface of the main shell (4) is fixedly connected with a plurality of flow guide blocks (14), and the inner surface of the nozzle body (1) is fixedly embedded with a flow guide ring (15).

5. The sheath air wrapped material jet printing head of claim 1, wherein: The top of the top plate (3) is communicated with a plurality of air inlet pipes (16), and the top of the top plate (3) is fixedly connected with a feeding pipe (17).

6. A sheath air wrapped material jet printing head according to claim 5, wherein: The inner surface of the air inlet pipe (16) is fixedly embedded with a valve cylinder (18), and the inside of the valve cylinder (18) is movably embedded with a plurality of valve rods (19).

7. A sheath air wrapped material jet printing head according to claim 6, wherein: The bottom of the plurality of valve rods (19) is fixedly connected with a valve plate (20), and the top of the valve rod (19) is fixedly connected with a stress plate (21).

8. The sheath air wrapped material jet printing head of claim 7, wherein: The outer surface of the valve rod (19) is movably sleeved with a spring (22), the bottom of the plurality of springs (22) is fixedly connected to the top of the valve cylinder (18), and the top of the spring (22) is fixedly connected to the bottom of the stress plate (21).

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