Continuous feeding device for kaolin 3D printer

Abstract

The utility model relates to a continuous feeding device for a kaolin 3D printer in the technical field of 3D printing, which comprises a storage box and a reciprocating linear motion mechanism, and further comprises a feeding assembly, the feeding assembly is provided with a piston cylinder, a piston plate is matched with an inner cavity of the piston cylinder in a sealing and sliding mode, and detection pre-limiting pieces capable of detecting the position of the piston plate are arranged at the two ends of the piston cylinder. An early warning gap exists between the pre-limiting piece and the inner end face of the piston cylinder on the same side; the reciprocating linear motion mechanism can be controlled to reversely drive the piston plate to move when the piston plate is detected by the detection pre-limiting piece and after the kaolin 3D printer prints the layer and before the kaolin 3D printer prints the next layer, and the problem that in the prior art, in the printing posture, after the circulating feeding cylinder moves to the left limit or the right limit, when the direction changes rightwards or leftwards, the piston plate cannot move is solved. And short pause of feeding can occur, that is, the situation of insufficient feeding occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a continuous feeding device for a kaolin 3D printer. Background Art

[0002] The existing Chinese invention patent application with publication number CN108544634A discloses a loading device and a loading method for a ceramic 3D printer. The loading device in the device includes a linear motion mechanism for driving a circulating feed cylinder and a circulating feed cylinder for continuously conveying ceramic printing materials to a scraper mechanism; when the movable piston cylinder body moves to the left relative to the piston, the ceramic printing material in the material box enters the piston cavity through the first feed hose and the first one-way valve, and enters the first discharge hose through the second one-way valve to reach the manifold; when the movable piston cylinder body moves to the right relative to the piston, the ceramic printing material enters the piston cavity through the second feed hose and the third one-way valve, and enters the second discharge hose through the fourth one-way valve to reach the manifold.

[0003] Although the device can realize the function of continuous feeding, the feeding device in the device has the following shortcomings: 1. When the accuracy of the linear motion mechanism is insufficient, insufficient feeding is likely to occur during the printing process, affecting product quality; 2. When the circulating feeding cylinder moves to the left or right limit during the printing posture, when changing direction to the right or left, there will be a short pause in feeding, that is, insufficient feeding occurs.

[0004] To this end, we designed a continuous feeding device for kaolin 3D printer. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses a continuous feeding device for a kaolin 3D printer.

[0006] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0007] A continuous feeding device for a kaolin 3D printer, comprising a material storage box, a reciprocating linear motion mechanism, and further comprising:

[0008] A feeding assembly, which comprises a piston cylinder, wherein the inner cavity of the piston cylinder is sealed and slidably matched with a piston plate, and both ends of the piston cylinder are provided with detection pre-limiting parts capable of detecting the position of the piston plate, and there is a warning gap between the detection pre-limiting part and the inner end surface of the piston cylinder on the same side;

[0009] There are two feed pipes, the feed ends of the two feed pipes are both connected to the bottom of the inner cavity of the storage box, and the discharge ends of the two feed pipes are respectively connected to the two ends of the inner cavity of the piston cylinder through the first one-way valve;

[0010] There are two discharge pipes, and the feed ends of the two discharge pipes are connected to the two ends of the inner cavity of the piston cylinder through the second one-way valve respectively;

[0011] The concentrator has two feed ends, the two feed ends of the concentrator are respectively connected to the feed ends of the two discharge pipes, and the discharge end of the concentrator is connected to the printer head of the kaolin 3D printer.

[0012] Preferably, the detection pre-limiting member includes:

[0013] A mounting cylinder, the closed end of which is radially mounted on the side wall of the piston cylinder;

[0014] An early warning switch is arranged at the opening end of the installation tube, and a trigger end of the early warning switch extends into the installation tube;

[0015] Among them, the trigger end of the early warning switch is provided with a magnet that can move under the action of the piston plate, thereby driving the triggering of the early warning switch, and a reset spring is provided between the magnet and the bottom surface of the installation cylinder.

[0016] Preferably, the closed end seal of the mounting cylinder penetrates through the side wall of the piston cylinder, and the outer end surface of the closed end of the mounting cylinder is flush with the inner side surface of the piston cylinder.

[0017] Preferably, a positioning ring is provided on the body of the mounting cylinder at a position corresponding to the outer side of the piston cylinder, and the inner end surface of the positioning ring is in correspondence with the outer side surface of the piston cylinder.

[0018] Preferably, elastic parts are provided on both surfaces of the piston plate, and a movable plate is provided at one end of the elastic part away from the piston plate, and the outer edge of the movable plate is in sealing and sliding cooperation with the inner wall of the piston cylinder, and the inner edge of the movable plate is in corresponding sealing and sliding cooperation with the output rod of the reciprocating linear motion mechanism.

[0019] Preferably, the elastic member is a spring or a rubber ring coaxially arranged with the piston plate.

[0020] Preferably, the reciprocating linear motion mechanism includes a screw motor, the screw part of the screw motor is equipped with a threaded slider, both ends of the threaded slider are provided with extension parts along its moving direction, and the outer end of the extension part is provided with a guide rod; the two guide rods are spaced relative to each other, and are both sealed and movably inserted into the piston cylinder, and are correspondingly fixed to the piston plate.

[0021] Preferably, the reciprocating linear motion mechanism further comprises a linear slide rail, and the threaded slider is slidably connected to the linear slide rail along the length direction of the linear slide rail.

[0022] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0023] 1. The utility model can control the reciprocating linear motion mechanism to reversely drive the piston plate to move after the kaolin 3D printer prints the layer and before the next layer when the piston plate is detected by the detection pre-limiting part. The kaolin 3D printer prevents the piston plate from moving to the limit position in the printing posture, and solves the problem in the prior art that in the printing posture, after the circulating feeding cylinder moves to the left or right limit, when changing direction to the right or left, there will be a short pause in feeding, that is, insufficient feeding occurs;

[0024] 2. The setting of elastic parts and movable plates can pre-extrude the kaolin slurry before printing. When printing is about to end, the elastic parts and movable plates are used to continuously feed the material to ensure sufficient and uninterrupted feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the feeding component in the utility model;

[0027] Figure 3 It is a cross-sectional view of the feeding assembly in the utility model;

[0028] Figure 4 It is a cross-sectional view of the detection pre-limiting member in the utility model.

[0029] In the figure: 1. material storage box; 2. reciprocating linear motion mechanism; 21. screw motor; 22. threaded slider; 23. guide rod; 24. linear slide rail; 3. feeding assembly; 31. piston cylinder; 32. piston plate; 33. detection pre-limiting member; 331. mounting cylinder; 332. early warning switch; 333. magnet; 334. reset spring; 335. positioning ring; 34. elastic member; 35. movable plate; 4. feed pipe; 5. first one-way valve; 6. discharge pipe; 7. second one-way valve; 8. confluence. DETAILED DESCRIPTION

[0030] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0031] Embodiment 1, in combination with the attached Figure 1-3 A continuous feeding device for a kaolin 3D printer includes a material storage box 1 and a reciprocating linear motion mechanism 2.

[0032] Furthermore, the reciprocating linear motion mechanism 2 includes a screw motor 21, the screw part of the screw motor 21 is transmitted with a threaded slider 22, both ends of the threaded slider 22 are provided with extension parts along its moving direction, and the outer end of the extension part is provided with a guide rod 23; the two guide rods 23 are spaced relative to each other, and are both sealed and movably inserted into the piston cylinder 31, and are correspondingly fixed to the piston plate 32.

[0033] Furthermore, the reciprocating linear motion mechanism 2 further includes a linear slide rail 24 , and the threaded slider 22 is slidably connected to the linear slide rail 24 along the length direction of the linear slide rail 24 .

[0034] Also includes:

[0035] The feeding assembly 3 comprises a piston cylinder 31, the inner cavity of the piston cylinder 31 is sealed and slidably matched with a piston plate 32, both ends of the piston cylinder 31 are provided with detection pre-limiting parts 33 capable of detecting the position of the piston plate 32, and there is a warning gap between the detection pre-limiting part 33 and the inner end surface of the piston cylinder 31 on the same side;

[0036] Specifically, the detection pre-limiting member 33 is connected to the kaolin 3D printer control system signal.

[0037] During specific use, when the detection pre-limiting member 33 detects the piston plate 32, after the kaolin 3D printer prints the current layer and before the next layer, the control system controls the reciprocating linear motion mechanism 2 to reversely drive the piston plate 32 to move. The kaolin 3D printer is in the printing posture, which prevents the piston plate 32 from moving to the extreme position. This solves the problem in the prior art that in the printing posture, after the circulating feed cylinder moves to the left or right limit, when changing direction to the right or left, there will be a brief pause in feeding, that is, insufficient feeding occurs.

[0038] There are two feed pipes 4, the feed ends of the two feed pipes 4 are connected to the bottom of the inner cavity of the storage box 1, and the discharge ends of the two feed pipes 4 are connected to the two ends of the inner cavity of the piston cylinder 31 through the first one-way valve 5;

[0039] There are two discharge pipes 6, and the feed ends of the two discharge pipes 6 are connected to the two ends of the inner cavity of the piston cylinder 31 through the second one-way valve 7 respectively;

[0040] The concentrator 8 has two feed ends, which are respectively connected to the feed ends of the two discharge pipes 6, and the discharge end of the concentrator 8 is connected to the printer head of the kaolin 3D printer.

[0041] Further, detecting the pre-limiting member 33 includes:

[0042] The mounting cylinder 331 has a closed end mounted radially on the side wall of the piston cylinder 31;

[0043] The early warning switch 332 is disposed at the opening end of the installation tube 331, and the trigger end of the early warning switch 332 extends into the installation tube 331;

[0044] The trigger end of the early warning switch 332 is provided with a magnet 333 which can move under the action of the piston plate 32 and drive the early warning switch 332 to be triggered. A reset spring 334 is provided between the magnet 333 and the inner bottom surface of the mounting tube 331 .

[0045] Furthermore, the closed end of the mounting tube 331 seals and penetrates the side wall of the piston cylinder 31 , and the outer end surface of the closed end of the mounting tube 331 is flush with the inner side surface of the piston cylinder 31 .

[0046] Specifically, the warning switch 332 is in a non-triggered state under normal conditions.

[0047] Specifically, when the piston plate 32 moves to the mounting cylinder 331, a large adsorption force is generated between the magnet 333 and the piston plate 32, the magnet 333 squeezes the reset spring 334, the reset spring 334 is compressed, and the magnet 333 drives the trigger end of the early warning switch 332 to move, thereby triggering the early warning switch 332.

[0048] Embodiment 2, combined with the attached Figure 2-4 A continuous feeding device for a kaolin 3D printer is provided. On the basis of the first embodiment, in order to ensure that the inner end surface of the mounting cylinder 331 can be quickly positioned during assembly, a positioning ring 335 is provided at a position corresponding to the outer side of the piston cylinder 31 on the mounting cylinder 331 body, and the inner end surface of the positioning ring 335 is correspondingly fitted with the outer side surface of the piston cylinder 31.

[0049] Embodiment 3, in combination with the attached Figure 2-3 , a continuous feeding device for a kaolin 3D printer, based on the first or second embodiment, in order to eliminate the influence of the precision of the reciprocating linear motion mechanism 2 on the quality of the produced product; elastic members 34 are provided on both sides of the piston plate 32, and a movable plate 35 is provided at one end of the elastic member 34 away from the piston plate 32, and the outer edge of the movable plate 35 is sealed and slidably matched with the inner side wall of the piston cylinder 31, and the inner edge of the movable plate 35 is sealed and slidably matched with the output rod of the reciprocating linear motion mechanism 2.

[0050] During specific use, the reciprocating linear motion mechanism 2 is preferably started and closed compared to the printer head. In this way, since the reciprocating linear motion mechanism 2 is preferably started, the piston plate 32 moves at this time. Since the printer head is in a closed posture at this time, the corresponding elastic member 34 is compressed. When this side contacts, even if the reciprocating linear motion mechanism 2 is preferably closed, the resetting of the elastic member 34 can enable the movable plate 35 to still move a certain distance and continue to supply materials to the printer head, ensuring that the material supply will not be interrupted or insufficient, which solves the problem in the prior art that when the linear motion mechanism is not accurate enough, insufficient material supply may occur during printing, affecting product quality.

[0051] As required, the elastic member 34 is a spring or a rubber ring coaxially arranged with the piston plate 32 .

[0052] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A continuous feeding device for a kaolin 3D printer, comprising a material storage box (1) and a reciprocating linear motion mechanism (2), characterized in that: Also includes: A feeding assembly (3) comprises a piston cylinder (31), the inner cavity of the piston cylinder (31) is sealingly and slidably matched with a piston plate (32), both ends of the piston cylinder (31) are provided with detection pre-limiting parts (33) capable of detecting the position of the piston plate (32), and there is a warning gap between the detection pre-limiting part (33) and the inner end surface of the piston cylinder (31) on the same side; There are two feed pipes (4), the feed ends of the two feed pipes (4) are both connected to the bottom of the inner cavity of the storage box (1), and the discharge ends of the two feed pipes (4) are respectively connected to the two ends of the inner cavity of the piston cylinder (31) through the first one-way valve (5); There are two discharge pipes (6), and the feed ends of the two discharge pipes (6) are respectively connected to the two ends of the inner cavity of the piston cylinder (31) through the second one-way valve (7); The concentrator (8) has two feed ends, the two feed ends of the concentrator (8) are respectively connected to the feed ends of the two discharge pipes (6), and the discharge end of the concentrator (8) is connected to the printer head of the kaolin 3D printer.

2. A continuous feeding device for a kaolin 3D printer according to claim 1, characterized in that: The detection pre-limiting member (33) comprises: A mounting cylinder (331), the closed end of which is radially mounted on the side wall of the piston cylinder (31); An early warning switch (332) is arranged at the opening end of the installation tube (331), and a trigger end of the early warning switch (332) extends into the installation tube (331); The trigger end of the early warning switch (332) is provided with a magnet (333) which can move under the action of the piston plate (32) and drive the early warning switch (332) to be triggered, and a return spring (334) is provided between the magnet (333) and the inner bottom surface of the mounting tube (331).

3. A continuous feeding device for a kaolin 3D printer according to claim 2, characterized in that: The closed end of the installation cylinder (331) seals and penetrates the side wall of the piston cylinder (31), and the outer end surface of the closed end of the installation cylinder (331) is flush with the inner side surface of the piston cylinder (31).

4. A continuous feeding device for a kaolin 3D printer according to claim 3, characterized in that: A positioning ring (335) is provided on the body of the installation cylinder (331) at a position corresponding to the outside of the piston cylinder (31), and the inner end surface of the positioning ring (335) is correspondingly fitted with the outer surface of the piston cylinder (31).

5. The continuous feeding device for a kaolin 3D printer according to claim 1, characterized in that: The piston plate (32) is provided with elastic members (34) on both plate surfaces, and a movable plate (35) is provided at one end of the elastic member (34) away from the piston plate (32), and the outer edge of the movable plate (35) is in sealing and sliding cooperation with the inner wall of the piston cylinder (31), and the inner edge of the movable plate (35) is in corresponding sealing and sliding cooperation with the output rod of the reciprocating linear motion mechanism (2).

6. A continuous feeding device for a kaolin 3D printer according to claim 5, characterized in that: The elastic member (34) is a spring or a rubber ring coaxially arranged with the piston plate (32).

7. The continuous feeding device for a kaolin 3D printer according to claim 1, characterized in that: The reciprocating linear motion mechanism (2) comprises a screw motor (21), the screw part of the screw motor (21) is coupled with a threaded slider (22), both ends of the threaded slider (22) are provided with extensions along the moving direction thereof, and the outer ends of the extensions are provided with guide rods (23); the two guide rods (23) are spaced apart from each other, and are both sealed and movably inserted into the piston cylinder (31), and are correspondingly fixed to the piston plate (32).

8. A continuous feeding device for a kaolin 3D printer according to claim 7, characterized in that: The reciprocating linear motion mechanism (2) further comprises a linear slide rail (24), and the threaded slider (22) is slidably connected to the linear slide rail (24) along the length direction of the linear slide rail (24).

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