Packaging and feeding device based on 3D printing materials

Abstract

The utility model provides a packaging and feeding device based on 3D printing materials, which relates to the technical field of 3D printing and comprises an extrusion mechanism and a flexible bag used for storing the 3D printing materials. The extrusion mechanism comprises a first extrusion roller and a second extrusion roller, the rotation directions of the first extrusion roller and the second extrusion roller are opposite, an extrusion interval used for extruding the flexible bag is formed between the first extrusion roller and the second extrusion roller, the extrusion interval comprises a flexible bag inlet and a flexible bag outlet, the flexible bag inlet faces a 3D printing head of the 3D printer, and the flexible bag outlet faces the 3D printing head of the 3D printer. A preset distance is formed between the inlet of the flexible bag and the 3D printing head; the flexible bag comprises an extrusion initial end and an extrusion terminal end which sequentially enter the extrusion interval from the flexible bag inlet, and a printing material discharge port is formed in the extrusion terminal end; and the printing material discharging opening communicates with the 3D printing head through a hose, the length of the hose is not smaller than the preset distance, bubbles are prevented from being generated between 3D printing materials, the printing quality and efficiency are improved, storage and transportation are convenient, and the environment-friendly effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a packaging and supply device based on 3D printing materials. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer. During the 3D printing process, the printing materials need to be supplied in a timely manner to ensure the quality of the product during printing.

[0003] In the existing 3D printer feeding equipment, the 3D printing material is often stored in a barrel in advance. When working, the raw materials in the barrel are transported to a large storage barrel, and the bottom of the storage barrel is connected to the printing device through a feed pipe.

[0004] For example, patent CN221067212U discloses a material feeding device for 3D printing, which has multiple barrels fixed on a turntable, and the barrels are filled with raw materials for 3D printing. A storage barrel is fixedly arranged in a box body, and the volume of the storage barrel is significantly larger than the volume of the barrel. When the barrel inside the turntable is rotated to align with the discharge hole, the pigment in the barrel will enter the storage barrel through the discharge port and the discharge hole, and then be transported to the print head of the 3D printer through the discharge pipe at the bottom of the storage barrel.

[0005] However, when the raw materials are transported to the storage barrel, bubbles will be generated between the materials. When the materials containing bubbles are transported to the print head of the 3D printer, the print head of the 3D printer cannot obtain sufficient materials, which will seriously affect the printing quality.

[0006] Therefore, it is urgent to propose a feeding device for 3D printing, which can effectively avoid the generation of bubbles in the raw materials, ensure stable feeding, and ensure that the 3D printer has good printing quality. Utility Model Content

[0007] The purpose of the utility model is to provide a packaging and supply device based on 3D printing materials to solve the problems existing in the above-mentioned prior art. The 3D printing materials are stored in a flexible bag, and the first extrusion roller and the second extrusion roller extrude the materials, and the extruded 3D printing materials are transported to the 3D printing head along the hose. During the feeding process, there is no need to pour the 3D printing materials into the feeding barrel first, which prevents bubbles from being generated between the 3D printing materials, improves the printing quality and printing efficiency, facilitates storage and transportation, and has a good environmental protection effect.

[0008] To achieve the above-mentioned purpose, the utility model provides the following solutions: Provide a packaging and supply device based on 3D printing materials, including: an extrusion mechanism and a flexible bag for storing 3D printing materials;

[0009] The extrusion mechanism includes a first extrusion roller and a second extrusion roller, the first extrusion roller and the second extrusion roller rotate in opposite directions, an extrusion section for extruding the flexible bag is formed between the first extrusion roller and the second extrusion roller, the extrusion section includes a flexible bag inlet and a flexible bag outlet, the flexible bag inlet faces a 3D printing head of a 3D printer, and a preset distance is provided between the flexible bag inlet and the 3D printing head;

[0010] The flexible bag includes an extrusion initial end and an extrusion terminal end which enter the extrusion interval in sequence from the flexible bag inlet, and a printing material outlet is provided on the extrusion terminal end; the printing material outlet is connected to the 3D printing head through a hose, and the length of the hose is not less than the preset distance.

[0011] Preferably, the flexible bags are multiple and are connected to the 3D printing head via a multi-head connecting pipe.

[0012] Preferably, the extrusion mechanism includes a box body, which is divided into two parts, including a first shell and a second shell respectively, the first shell and the second shell are hinged, and the first shell and the second shell are respectively provided with notches on the side opposite to the hinge axis, the first extrusion roller is rotatably connected to the inner wall of the first shell, and the second extrusion roller is rotatably connected to the inner wall of the second shell.

[0013] Preferably, a reset mechanism is provided on the box body, and the reset mechanism includes a first adjustment rod hinged to the first shell and a second adjustment rod hinged to the second shell, and both ends of the reset spring are respectively connected to the first adjustment rod and the second adjustment rod.

[0014] Preferably, a first drive motor for driving the first extrusion roller to rotate is arranged on the outer wall of the first shell, and the output shaft of the first drive motor is connected to the first extrusion roller. A second drive motor for driving the second extrusion roller to rotate is arranged on the outer wall of the second shell, and the output shaft of the second drive motor is connected to the second extrusion roller.

[0015] Preferably, it also includes a flexible bag joint sealed with the printing material discharge port, wherein the outer side wall of the flexible bag joint is provided with a card slot and a joint thread in sequence along the discharge path, and the hose is provided with a hose joint for sealingly connecting with the flexible bag joint, and the hose joint is a snap-on hose joint or a threaded hose joint.

[0016] Preferably, the outer wall surface of the flexible bag joint is provided with a step for welding with the printing material discharge port, and the step is provided on a side of the card slot away from the joint thread.

[0017] Preferably, the hose connector is a bayonet-type hose connector, which includes an inserting portion and a clamping portion, the inserting portion includes a cannula for being inserted into the flexible bag connector, the clamping portion includes a frustum and a buckle for being clamped with the clamping slot, the frustum is arranged around the circumference of the cannula, the plane where the frustum is located is perpendicular to the axis of the cannula, and a sealing gasket for sealing the flexible bag connector is arranged on the side of the frustum facing the flexible bag; there are a plurality of buckles, and the plurality of buckles are arranged around the circumference of the frustum.

[0018] Preferably, the hose connector is a threaded hose connector, which includes a plug-in portion and a threaded connection portion, the plug-in portion includes a cannula for inserting into the flexible bag connector, the threaded connection portion includes a truncated cone and an annular shell for threaded connection with the connector, the truncated cone is arranged around the outer circumference of the cannula, the plane where the truncated cone is located is perpendicular to the axis of the cannula, and a sealing gasket for sealing the flexible bag connector is arranged on the side of the truncated cone facing the flexible bag; the annular shell is arranged around the outer circumference of the truncated cone, and the inner wall surface of the annular shell is provided with an internal thread.

[0019] Preferably, spare discharge ports are provided on the outer side walls of the snap-on hose connector and the threaded hose connector.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The 3D printing material is stored in a flexible bag, which is sandwiched between a first extrusion roller and a second extrusion roller. The first extrusion roller and the second extrusion roller extrude the 3D printing material in the packaging bag, and the extruded 3D printing material is transported to the 3D printing head along a hose. During the feeding process, there is no need to pour the 3D printing material into the feeding barrel first and then transport it to the 3D printing head. The contact area between the 3D printing material of the utility model and the air during the transportation process is small, and the flow process of the 3D printing material is stable; and there is no need to transport the 3D printing material to a third-party feeding device. The 3D printing material will not be disturbed and mixed with the air to a large extent, and bubbles are prevented from being generated between the 3D printing materials. At the same time, the automatic extrusion of the 3D printing material can be completed, which improves the printing quality and printing efficiency, facilitates storage and transportation, has low production costs, and the packaging after use can be recycled and reused or conveniently disposed of in an environmentally friendly manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the extrusion mechanism structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the first shell structure of the utility model;

[0026] Figure 4 This is a schematic diagram of the second housing structure of the utility model;

[0027] Figure 5 This is a schematic diagram of the cross-sectional structure of the flexible bag of the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the multi-head connecting pipe of the utility model;

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the flexible bag of the utility model from another perspective;

[0030] Figure 8 This is a schematic diagram of another state of the extrusion mechanism of the utility model;

[0031] Fig. 9 This is a schematic diagram of the structure of the raised portion of the utility model;

[0032] Fig.10 This is a schematic diagram of the profile structure of the utility model;

[0033] Fig.11 This is a schematic diagram of the flexible bag connection structure of the utility model;

[0034] Fig.12 This is a schematic diagram of the structure of the flexible bag joint of the utility model;

[0035] Fig.13 This is a schematic diagram of the structure of the buckle-type hose connector of the utility model;

[0036] Fig.14 This is a schematic diagram of the structure of the threaded hose connector of the utility model;

[0037] Fig.15 This is a schematic diagram of the cross-sectional structure of the threaded hose connector of the utility model;

[0038] Fig.16 This is a schematic diagram of the structure of the feeding electric valve of the utility model;

[0039] Fig.17 It is a front view schematic diagram of another embodiment of the utility model;

[0040] Fig.18 This is a schematic diagram of the overall structure of another embodiment of the utility model.

[0041] Among them, 1. extrusion mechanism; 2. flexible bag; 3. first extrusion roller; 4. second extrusion roller; 5. printing material outlet; 6. hose; 7. guide section; 8. side strip; 9. multi-head connecting pipe; 10. connecting pipe body; 11. hose insertion port; 12. pressure sensor; 13. first shell; 14. second shell; 15. notch; 16. hinge; 17. fixing part; 18. hinged part; 19. first adjusting rod; 20. second adjusting rod; 21. return spring; 22. first drive motor; 23. second drive motor; 24. Raised portion; 25. Support frame; 26. Profile; 27. Flexible bag connector; 28. Slot; 29. ​​Connector thread; 30. Hose connector; 31. Snap-on hose connector; 32. Threaded hose connector; 33. Insert; 34. Cone; 35. Snap; 36. Step; 37. Sealing gasket; 38. Annular shell; 39. Internal thread; 40. Alternate discharge port; 41. Feeding electric valve; 42. Exhaust electric valve; 43. First storage chamber; 44. Second storage chamber; 45. Third storage chamber; 46. Flexible bag manifold. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Please refer to Figures 1 to 18As shown, in this embodiment, a packaging and supply device based on 3D printing materials is provided, including an extrusion mechanism 1 and a flexible bag 2. The flexible bag 2 is used as a packaging of 3D printing materials. The 3D printing materials can be stored through the flexible bag 2. The extrusion mechanism 1 includes a first extrusion roller 3 and a second extrusion roller 4, and the first extrusion roller 3 and the second extrusion roller 4 rotate in opposite directions. The first extrusion roller 3 and the second extrusion roller 4 are close to each other, and preferably the first extrusion roller 3 and the second extrusion roller 4 are parallel to each other. An extrusion interval is formed between the first extrusion roller 3 and the second extrusion roller 4. The extrusion interval includes a flexible bag inlet and a flexible bag outlet. The flexible bag inlet and the flexible bag outlet are arranged in sequence along the rotation direction of the first extrusion roller 3 and the second extrusion roller 4, that is, the flexible bag inlet is located on the side where the first extrusion roller 3 and the second extrusion roller 4 are close to each other in the rotation direction, and the flexible bag outlet is located on the side where the first extrusion roller 3 and the second extrusion roller 4 are away from each other in the rotation direction. The 3D printer includes a 3D printing head, the flexible bag inlet faces the 3D printing head, and there is a preset distance between the flexible bag inlet and the 3D printing head, and the preset distance can be adjusted according to actual conditions. The flexible bag 2 includes an extrusion initial end and an extrusion terminal end, and the flexible bag 2 enters the extrusion interval through the flexible bag inlet through the extrusion initial end. A printing material outlet 5 is provided at the position of the extrusion terminal end of the flexible bag 2, and a hose 6 is connected between the printing material outlet 5 and the 3D printing head, and the length of the hose 6 is not less than the preset distance between the flexible bag inlet and the 3D printing head.

[0045] Working principle: The extrusion initial end of the flexible bag 2 is placed in the extrusion interval between the first extrusion roller 3 and the second extrusion roller 4, and the first extrusion roller 3 and the second extrusion roller 4 are operated, so that the 3D printing material in the flexible bag 2 is discharged into the hose 6 through the printing material outlet 5, and the 3D printing material is then transported to the print head of the 3D printer through the hose 6 to perform the 3D printing operation. When the first extrusion roller 3 and the second extrusion roller 4 are working, the flexible bag 2 continuously moves in the extrusion interval, and the extrusion terminal end of the flexible bag 2 continuously approaches the flexible bag entrance of the extrusion interval. When the extrusion terminal end of the flexible bag 2 coincides with the flexible bag entrance, it means that the 3D printing material stored in the flexible bag 2 has been fully extruded. In this process, the extrusion initial end on the flexible bag 2 is a dynamic end, which is always located at the position where the flexible bag 2 coincides with the flexible bag entrance of the extrusion interval. Moreover, since the length of the hose 6 is not less than the preset distance between the flexible bag inlet and the 3D printing head, the displacement or elastic deformation of the hose 6 itself can ensure that the 3D printing material in the flexible bag 2 can be stably transported to the 3D printing head during the process of the flexible bag 2 being squeezed and moved.

[0046] The utility model stores 3D printing materials through a flexible bag 2. The flexible bag 2 is sandwiched between a first extrusion roller 3 and a second extrusion roller 4. The first extrusion roller 3 and the second extrusion roller 4 extrude the 3D printing materials in the packaging bag, and the extruded 3D printing materials are transported to the 3D printing head along a hose 6. During the feeding process, there is no need to pour the 3D printing materials into the feeding barrel first and then transport them to the 3D printing head. The contact area between the 3D printing materials of the utility model and the air during the transportation process is small, and the flow process of the 3D printing materials is stable, and there will be no disturbance and mixing with the air to a large extent, which can prevent the generation of bubbles between the 3D printing materials. At the same time, the automatic extrusion of the 3D printing materials can be completed, thereby improving the printing quality and printing efficiency. The feeding device uses a roller to directly extrude the material bag, and adopts flexible material packaging, which is convenient for storage and transportation, greatly reduces the cost, and the packaging after use can be recycled and reused or convenient for environmental protection treatment. Moreover, the 3D printing materials in the flexible bag 2 can be directly transported to the 3D printing head for 3D printing operations. There is no need to input the 3D printing materials in the flexible bag 2 into other storage devices for transportation. The packaging does not need to be changed during transportation, and the materials do not need to be transferred to a third-party feeding device. The flexible bag 2 can be used directly with the feeding device without touching it, avoiding bubbles in the 3D printing materials or contamination by other devices. Moreover, during transportation and storage, the flexible bag 2 can adapt to changes in flexibility to avoid possible harm caused by shrinkage and expansion during transportation and storage.

[0047] In one embodiment, a guide section 7 is provided in the flexible bag 2, and the guide section 7 is connected to the printing material outlet 5, and one end of the guide section 7 is butted against the inner wall of the flexible bag 2, and gradually shrinks toward the printing material outlet 5. The guide section 7 also has a "trumpet-shaped" structure, that is, the opening of the guide section 7 on the side close to the inner cavity of the flexible bag 2 is larger, and as it gradually approaches the printing material outlet 5, the opening of the guide section 7 becomes smaller and smaller. The guide section 7 can fully squeeze out the 3D printing material in the flexible bag 2, reducing the amount of 3D printing material left at the corners of the flexible bag 2.

[0048] In this embodiment, microporous structures are evenly distributed on the flexible bag 2. The microporous structures are invisible to the naked eye and can pass air or oxygen. The micropores will not cause leakage of the 3D printing material in the flexible bag 2. They have the effect of oxygen inhibition (oxygen inhibits polymerization) on the photocurable material. The microporous structure can prevent the 3D printing material from solidifying, thereby improving the stability of the storage and transportation process.

[0049] In this embodiment, a side strip 8 is arranged around the outer circumference of the flexible bag 2, and the flexible bag 2 is symmetrical front to back about the plane where the side strip 8 is located. When the flexible bag 2 is initially placed into the extrusion interval, the side strip 8 can be placed into the extrusion interval first, and extrusion can be started from the position of the side strip 8, so that the 3D printing material in the flexible bag 2 can be fully squeezed out.

[0050] In one embodiment, a plurality of flexible bags 2 are provided, and the plurality of flexible bags 2 are connected to the 3D printing head through a multi-head connecting tube 9. The multi-head connecting tube 9 includes a connecting tube body 10, and a plurality of hose insertion ports 11 are provided on the connecting tube body 10, and the hose insertion ports 11 are connected to the hoses 6 corresponding to the flexible bags 2. Preferably, the hose insertion ports 11 are uniformly arranged in sequence along the axis of the connecting tube body 10, and the diameter of the connecting tube body 10 and the diameter of the hose insertion port 11 are the same or similar to the diameter of the hose 6. When the 3D printing material is input into the connecting tube body 10 through the hose 6, the 3D printing material can fill the inner cavity of the connecting tube body 10 and the hose insertion port 11, and the 3D printing material will not be greatly disturbed, thereby avoiding the generation of bubbles in the 3D printing material as much as possible. The multi-head connecting tube 9 is connected to a pressure sensor 12, and the pressure in the multi-head connecting tube 9 can be monitored by the pressure sensor 12.

[0051] In one embodiment, the extrusion mechanism 1 includes a box body, and the box body is divided into two parts, including a first shell 13 and a second shell 14 respectively, and the first shell 13 and the second shell 14 are hinged, and the hinge axis is located on the side walls of the first shell 13 and the second shell.

[0052] The first shell 13 and the second shell 14 are open at one end facing the hose 6, so that the flexible bag 2 can be conveniently put in or taken out from the bottom of the first shell 13 and the second shell 14. At the same time, a notch 15 is provided on both the first shell 13 and the second shell 14, and the notch 15 is located on the side opposite to the hinge axis of the first shell 13 and the second shell 14. The first extrusion roller 3 is rotatably connected to the inner wall of the first shell 13, and the second extrusion roller 4 is rotatably connected to the inner wall of the second shell 14. When the first shell 13 and the second shell 14 are separated, a larger access opening is formed between the two notches 15, and the flexible bag 2 can also be put in or taken out through the access opening.

[0053] Preferably, the hinge 16 is further included, the hinge 16 is fixedly connected to the first shell 13, and the hinge 16 is rotatably connected to the second shell 14. The hinge 16 is a sheet-like structure, and is arranged at the bottom of the first shell 13 and the second shell 14. The hinge 16 includes two fixing parts 17 and a hinge part 18, and the hinge 16 is fixedly connected to the first shell 13 through the two fixing parts 17, preferably in a bolt fixing manner, and the hinge 16 is hinged to the second shell 14 through the hinge part 18. Thus, the opening and closing of the first shell 13 and the second shell 14 are realized.

[0054] In this embodiment, a reset mechanism is provided on the box body, and the reset mechanism includes a first adjustment rod 19 and a second adjustment rod 20, and the first adjustment rod 19 is hinged to the outer side wall of the first shell 13, and the second adjustment rod 20 is hinged to the outer side wall of the second shell 14, and a reset spring 21 is connected between the first adjustment rod 19 and the second adjustment rod 20. When an external force is applied to the first shell 13 or the second shell 14, and the first shell 13 and the second shell 14 are opened, the first adjustment rod 19 and the second adjustment rod 20 move relative to each other, and the reset spring 21 is compressed at this time. When the external force is cancelled, the reset spring 21 recovers its deformation, pulls the first adjustment rod 19 and the second adjustment rod 20 to move relative to each other, and makes the first shell 13 and the second shell 14 fit together. Preferably, the first adjustment rod 19 and the second adjustment rod 20 have an overlapping portion, and the reset spring 21 is sleeved on the overlapping portion of the first adjustment rod 19 and the second adjustment rod 20. The reset spring 21 can ensure that the first shell 13 and the second shell 14 are in a closed state.

[0055] In this embodiment, a first drive motor 22 is provided on the outer wall of the first shell 13, and the output shaft of the first drive motor 22 is connected to the first extrusion roller 3. A second drive motor 23 is provided on the outer wall of the second shell 14, and the output shaft of the second drive motor 23 is connected to the second extrusion roller 4. Preferably, splines are provided in the first extrusion roller 3 and the second extrusion roller 4, and the output shaft is connected to the first extrusion roller 3 and the second extrusion roller 4 through the splines. Preferably, a protrusion 24 is provided on the outer wall of the first extrusion roller 3 and the second extrusion roller 4, and the protrusion 24 is evenly arranged along the circumference of the outer wall of the first extrusion roller 3 and the second extrusion roller 4, and a groove is formed between adjacent protrusions 24, and the protrusions 24 of two adjacent extrusion rollers cooperate with the groove, and the protrusion 24 can be inserted into the groove, so as to achieve the extrusion of the flexible bag 2.

[0056] In this embodiment, a support frame 25 is also included, through which the extrusion mechanism 1, the flexible bag 2 and the hose 6 are supported, and multiple sets of extrusion mechanisms 1 and flexible bags 2 can be fixed on the support frame 25. The support frame 25 includes a profile 26, which is preferably located at the top of the support frame 25. The length of the profile 26 can be selected according to the actual use scenario. The first shell 13 is fixed on the profile 26. Preferably, the first shell 13 can be directly inserted into the profile 26, and the position of the first shell 13 on the profile 26 can be adjusted.

[0057] In one embodiment, a flexible bag joint 27 is included, and the flexible bag joint 27 is sealed and connected to the printing material outlet 5. Preferably, the flexible bag joint 27 is welded to the printing material outlet 5. A card slot 28 and a joint thread 29 are provided on the outer wall of the flexible bag joint 27. The card slot 28 and the joint thread 29 are arranged in sequence along the feeding path of the flexible bag joint 27. The joint thread 29 is located at the end of the flexible bag joint 27. A hose joint 30 is provided on the hose 6. The hose 6 is sealed and connected to the hose joint 30. Preferably, the hose 6 is welded to the hose joint 30. Among them, the hose joint 30 is a buckle-type hose joint 31 or a threaded hose joint 32; the buckle-type hose joint 31 can be buckled with the card slot 28, and the threaded hose joint 32 can be threadedly connected with the joint thread 29.

[0058] In this embodiment, a step 36 is provided on the outer wall surface of the flexible bag joint 27. The step 36 is located on the side of the slot 28 away from the joint thread 29. The step 36 is arranged around the outer wall surface of the flexible bag joint 27. The step 36 is divided into three layers. The topmost step 36 is flush with the end surface of the flexible bag joint 27 and is directly welded to the flexible bag 2 through the step 36 to ensure a stable connection between the flexible bag 2 and the flexible bag joint 27.

[0059] In one embodiment, when the hose connector 30 is a snap-on hose connector 31, the snap-on hose connector 31 includes an inserting portion and a snap-on portion, the inserting portion includes an inserting tube 33, and the inserting tube 33 is inserted into the flexible bag connector 27, so that the 3D printing material output from the flexible bag connector 27 can flow into the inserting tube 33. The snap-on portion includes a truncated cone 34 and a snap 35, the snap 35 is arranged around the outer circumference of the truncated cone 34, and the snap 35 is snap-on with the snap groove 28, so that the snap-on hose connector 31 and the flexible bag connector 27 are connected together. A sealing pad 37 is arranged on one side of the flexible bag 2 on the truncated cone 34, and the sealing pad 37 abuts against the discharge end of the flexible bag connector 27, so that the flexible bag connector 27 and the snap-on hose connector 31 form a seal, ensuring that the 3D printing material output from the flexible bag connector 27 can all flow into the snap-on hose connector 31.

[0060] In one embodiment, when the hose connector 30 is a threaded hose connector 32, the threaded hose connector 32 includes a plug-in portion and a threaded connection portion. The plug-in portion includes a plug-in tube 33, which is inserted into the flexible bag connector 27 through the plug-in tube 33. The threaded connection portion includes a cone 34 and an annular shell 38. The annular shell 38 is arranged around the outer circumference of the cone 34. The plane where the cone 34 is located is perpendicular to the axis of the plug-in tube 33. A sealing gasket 37 is arranged on one side of the flexible bag 2 on the cone 34. The sealing gasket 37 abuts against the discharge end of the flexible bag connector 27, so that the flexible bag connector 27 and the threaded hose connector 32 form a seal. The inner wall surface of the annular shell 38 is provided with an internal thread 39, and the annular shell 38 is connected to the flexible bag connector 27 through the internal thread 39.

[0061] Through the snap-on hose connector 31 , the threaded hose connector 32 and the flexible bag connector 27 , a stable sealed connection between the flexible bag 2 and the hose 6 can be achieved, and the installation and removal processes are simple and convenient.

[0062] In one embodiment, a spare discharge port 40 is provided on the outer side wall of the snap-on hose connector 31 and the threaded hose connector 32, and a spare discharge channel is provided in the spare discharge port 40. The snap-on hose connector 31 and the threaded hose connector 32 form a three-way valve, and the spare discharge port 40 can connect another flexible bag 2 and the flexible bag connector 27. When all the 3D printing materials in one flexible bag 2 are squeezed out, the 3D printing materials in another connected flexible bag 2 can be supplied, so as to realize continuous feeding. At the same time, the residual air can be discharged in advance through the spare discharge port 40 when changing materials, and then the materials are fed, which is conducive to foolproofing and troubleshooting. The spare discharge port 40 is also connected to an exhaust electric valve 42.

[0063] In one embodiment, Fig.17 , Fig.18 As shown, the flexible bag 2 is provided with three storage chambers for storing 3D printing materials, namely, the first storage chamber 43, the second storage chamber 44 and the third storage chamber 45; the first storage chamber 43, the second storage chamber 44 and the third storage chamber 45 are connected to the connecting pipe body 10 through the flexible bag joint 27, the hose joint 30 and the hose 6. The hose joints 30 corresponding to the first storage chamber 43, the second storage chamber 44 and the third storage chamber 45 are connected to a flexible bag manifold 46, and the structure of the preferred flexible bag manifold 46 is consistent with that of the connecting pipe body 10. The end of the flexible bag manifold 46 is connected to a spare discharge port 40, and the spare discharge port 40 is also connected to an exhaust electric valve 42. Different colors of 3D printing materials are stored in the first storage chamber 43, the second storage chamber 44 and the third storage chamber 45, respectively, to facilitate the adjustment of the printing color in the later stage. Preferably, the first storage cavity 43, the second storage cavity 44 and the third storage cavity 45 have different volumes, that is, three storage cavities of different components are formed in one flexible bag 2. The multi-component ratio combination packaging design can facilitate the use of multi-component ratios and play a role in preventing mistakes and troubleshooting.

[0064] In one embodiment, a feeding electric valve 41 is also connected between the hose insertion port 11 of the multi-head connecting tube 9 and the hose 6, and the feeding electric valve 41 can control the feeding speed. It is possible to fill 3D printing materials of different colors in each flexible bag 2, or store 3D printing materials of different colors in each storage cavity, and control the discharge of each flexible bag 2 through the feeding electric valve 41, so that the color of the 3D printing material in the multi-head connecting tube 9 can be controlled, and workpieces of different colors can be printed. At the same time, by controlling the effective material input amount output by each flexible bag 2 to the 3D printing head, the 3D printing materials of different colors can be controlled in real time to be input into the 3D printing head according to a certain proportion, and then the workpiece of gradient color can be 3D printed. The hose 6 of the 3D printing feeding system of the utility model is connected to the flexible bag 2, and a snap-on hose connector 31 and a threaded hose connector 32 are provided for selection. The simple standard interface facilitates automated and unmanned use. The installation process and the use process are fast, simple, economical and reliable. The requirement that the raw materials should be free of bubbles during 3D printing can be met, and pollution-free operation can be performed. Multiple feeding mechanisms are connected to the multi-head connecting pipe 9. In actual use, single-head feeding and multi-head feeding are optional, and material addition without stopping the machine can be achieved. Materials of different colors, different materials, and different characteristics can be switched online, and intelligent material replacement can be achieved, saving material replacement time and solving the pain points that plague the 3D industry.

[0065] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, 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 the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0066] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A packaging and supply device based on 3D printing materials, characterized in that: include: An extrusion mechanism (1) and a flexible bag (2) for storing 3D printing materials; The extrusion mechanism (1) comprises a first extrusion roller (3) and a second extrusion roller (4), the first extrusion roller (3) and the second extrusion roller (4) rotate in opposite directions, an extrusion zone for extruding the flexible bag (2) is formed between the first extrusion roller (3) and the second extrusion roller (4), the extrusion zone comprises a flexible bag inlet and a flexible bag outlet, the flexible bag inlet faces a 3D printing head of a 3D printer, and a preset distance is provided between the flexible bag inlet and the 3D printing head; The flexible bag (2) comprises an extrusion initial end and an extrusion terminal end which enter the extrusion interval in sequence from the flexible bag inlet, and a printing material discharge port (5) is arranged on the extrusion terminal end; the printing material discharge port (5) is connected to the 3D printing head via a hose (6), and the length of the hose (6) is not less than the preset distance.

2. The packaging and supply device based on 3D printing materials according to claim 1 is characterized in that: It comprises a plurality of the flexible bags (2), and the plurality of the flexible bags (2) are connected to the 3D printing head via a multi-head connecting pipe (9).

3. The packaging and supply device based on 3D printing materials according to claim 1, characterized in that: The extrusion mechanism (1) comprises a box body, which is divided into two parts, respectively comprising a first shell (13) and a second shell (14); the first shell (13) and the second shell (14) are hinged, and a notch (15) is provided on the first shell (13) and the second shell (14) on the side opposite to the hinge axis; the first extrusion roller (3) is rotatably connected to the inner wall of the first shell (13), and the second extrusion roller (4) is rotatably connected to the inner wall of the second shell (14).

4. The packaging and supply device based on 3D printing materials according to claim 3 is characterized in that: The box body is provided with a reset mechanism, the reset mechanism comprising a first adjustment rod (19) hinged to the first shell (13) and a second adjustment rod (20) hinged to the second shell (14), and two ends of a reset spring (21) are respectively connected to the first adjustment rod (19) and the second adjustment rod (20).

5. The packaging and supply device based on 3D printing materials according to claim 4 is characterized in that: A first drive motor (22) for driving the first extrusion roller (3) to rotate is arranged on the outer wall of the first shell (13), and an output shaft of the first drive motor (22) is connected to the first extrusion roller (3). A second drive motor (23) for driving the second extrusion roller (4) to rotate is arranged on the outer wall of the second shell (14), and an output shaft of the second drive motor (23) is connected to the second extrusion roller (4).

6. The packaging and supply device based on 3D printing materials according to claim 1, characterized in that: The invention also comprises a flexible bag joint (27) which is sealedly connected to the printing material discharge port (5), wherein a card slot (28) and a joint thread (29) are sequentially arranged on the outer wall of the flexible bag joint (27) along the discharge path, and a hose joint (30) which is used for being sealedly connected to the flexible bag joint (27) is arranged on the hose (6), and the hose joint (30) is a snap-on hose joint (31) or a threaded hose joint (32).

7. The packaging and supply device based on 3D printing materials according to claim 6, characterized in that: The outer wall surface of the flexible bag joint (27) is provided with a step (36) for welding with the printing material outlet (5), and the step (36) is arranged on a side of the card slot (28) away from the joint thread (29).

8. The packaging and supply device based on 3D printing materials according to claim 6, characterized in that: The hose connector (30) is a snap-on hose connector (31), which comprises an inserting portion and a snap-on portion. The inserting portion comprises a plug-in tube (33) for inserting into the flexible bag connector (27). The snap-on portion comprises a truncated cone (34) and a snap-on (35) for snapping with the snap-on groove (28). The truncated cone (34) is arranged around the outer circumference of the plug-in tube (33). The plane where the truncated cone (34) is located is perpendicular to the axis of the plug-in tube (33). A sealing pad (37) for sealing the flexible bag connector (27) is arranged on the side of the truncated cone (34) facing the flexible bag (2). A plurality of snap-ons (35) are provided, and the plurality of snap-ons (35) are arranged around the outer circumference of the truncated cone (34).

9. The packaging and supply device based on 3D printing materials according to claim 6, characterized in that: The hose connector (30) is a threaded hose connector (32), and the threaded hose connector (32) includes a plug-in portion and a threaded connection portion. The plug-in portion includes a cannula (33) for inserting into the flexible bag connector (27). The threaded connection portion includes a truncated cone (34) and an annular shell (38) for connecting with the connector thread (29). The truncated cone (34) is arranged around the outer circumference of the cannula (33), and the plane where the truncated cone (34) is located is perpendicular to the axis of the cannula (33). A sealing gasket (37) for sealing the flexible bag connector (27) is arranged on the side of the truncated cone (34) facing the flexible bag (2); the annular shell (38) is arranged around the outer circumference of the truncated cone (34), and the inner wall surface of the annular shell (38) is provided with an internal thread (39).

10. The packaging and supply device based on 3D printing materials according to claim 6, characterized in that: The outer side walls of the snap-on hose connector (31) and the threaded hose connector (32) are both provided with spare discharge ports (40).

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