3D Printing Filament Consumables and Their Preparation Methods

Abstract

This invention provides a 3D printing filament consumable and its preparation method. The method employs an adhesive bonding technique to connect and fix the ends of the consumable body to the winding spool, adapting to automated production and achieving high production efficiency. The technical problem to be solved by this invention is achieved through the following technical means: One aspect of this invention is the provision of a 3D printing filament consumable, comprising a winding spool and a consumable body. The consumable body includes two consumable ends located at its two ends, namely a first end and a second end. The first end and / or the second end are connected to the winding spool via a flexible connector. One side of the flexible connector is adhesive, and the flexible connector is bonded to the winding spool. This invention relates to the technical field of 3D printing.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more particularly to 3D printing filament consumables and their preparation methods. Background Technology

[0002] In the field of 3D printing technology, filaments are one of the commonly used consumables. Filaments typically consist of a filament body and a filament body wound around a spool. Generally, the ends of the filament body are sometimes fixed to corresponding slots or threading holes on the spool using a plug-in connection. For example, patent application number 202123014331.5, entitled "A Mechanism for Automatically Threading the End of a 3D Printing Filament Spool," uses automated equipment to easily and effectively thread the filament through two spool holes within the limited space after winding, and then tightens the filament to secure the end, preventing the filament body from loosening. This technology uses plug-in connections for automated assembly and production. No automated assembly and production using adhesive bonding is seen on the market. This application provides a method for automated assembly and production of 3D printing filaments using automated adhesive bonding. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a 3D printing filament consumable and its preparation method. The consumable body's end and the winding spool are connected and fixed by an adhesive bonding method, which is suitable for automated production and has high production efficiency.

[0004] The technical problem to be solved by this invention is achieved through the following technical means: One aspect of this invention is to propose a 3D printing filament consumable, including a winding spool and a consumable body. The consumable body includes two consumable ends located at its two ends, namely a first end and a second end, which are connected to the winding spool via a flexible connector. One side of the flexible connector is adhesive, and the flexible connector is adhered to the winding spool.

[0005] In the above solution, the filament body has two ends. One or both ends of the filament body are bonded to the winding spool using flexible connectors. Unlike existing technologies that use plugs or holes to fix the filament end, this invention uses bonding, allowing the filament end to be securely fixed to the winding spool. This invention achieves the assembly and production of the 3D printed filament body and winding spool through bonding, adapting to automated assembly production and achieving high production efficiency. The flexible connectors, being adhesive (e.g., adhesive tape), can be used to bond the filament end to the winding spool, firmly attaching the filament end to the winding spool. The flexible connectors can be torn off the winding spool, making it convenient to separate the filament end from the winding spool when needed, allowing the filament body to be used as raw material for 3D printing.

[0006] In one embodiment, the winding reel includes a winding shaft and side plates disposed at both ends of the winding shaft, with the first end connected to the outer surface of the winding shaft and / or the inner surface of the side plates via a flexible connector.

[0007] In the above scheme, the first end can be bonded to the winding spool. When the first end is only bonded to the winding shaft, it does not mean that the first end cannot contact the side plate; similarly, when the first end is only bonded to the side plate, it does not mean that the first end cannot contact the winding shaft. The first end refers to the end portion, not specifically the endpoint. When the first end is connected to the winding spool by a flexible connector, the flexible connector can be arranged only on the outer surface of the winding shaft; it can also be arranged only on the inner surface of the side plate; or it can be arranged simultaneously on both the outer surface of the winding shaft and the inner surface of the side plate, meaning that a portion of the flexible connector is arranged at the connection point between the winding shaft and the side plate.

[0008] In one embodiment, the winding reel includes a winding shaft and side plates disposed at both ends of the winding shaft, with the second end connected to the inner surface of the side plate via a flexible connector.

[0009] In the above scheme, the second end can be glued to the side plate, where the second end refers to the end portion and does not specifically refer to the endpoint.

[0010] In one embodiment, the flexible connector includes a toughening layer and an adhesive material layer disposed on one side of the toughening layer. The adhesive material layer is adhesive, the consumable end is attached to the adhesive material layer, and the winding reel is connected to the flexible connector through the adhesive material layer.

[0011] In the above scheme, the adhesive layer is sticky and mainly composed of adhesive materials such as glue. However, the adhesive layer has low toughness. Therefore, a toughening layer is designed to both allow the adhesive material to adhere and to give the flexible connector better toughness. The toughening layer is a material layer that increases toughness. Compared to the adhesive layer, the toughening layer has a smoother surface and is less sticky. Conventionally, when the flexible connector is adhesive tape, the adhesive layer is the sticky side, and the toughening layer is on the other side of the adhesive layer, and they are separate layers.

[0012] In one embodiment, the flexible connector has a folded portion in the middle or at the end, which is formed by bonding layers of adhesive material together.

[0013] In the above scheme, the folded part is used as a hand-held part for separating the flexible connector from the winding spool, or as a pre-reserved handle to facilitate tearing the flexible connector off the winding spool.

[0014] In one embodiment, the flexible connector includes a first part, a second part, and a third part that are connected. The first part is connected to the inner side surface of the side plate, the third part is connected to the outer side surface of the side plate, the second part is connected to the outer edge end face of the side plate, and the second end is located between the first part and the inner side surface of the side plate.

[0015] In the above scheme, the flexible connector covers the inner and outer sides of the side plate, which increases the tightness of the connection between the flexible connector and the winding spool. In addition, it can also make the second end more securely connected to the side plate by the flexible connector.

[0016] In one embodiment, the first portion of the flexible connector is provided with a protruding placement position adapted to the second end, the protruding placement position being recessed from the adhesive material layer toward the toughening layer.

[0017] In one embodiment, two flexible connectors are provided on the outside of the consumable end. The two flexible connectors are respectively connected to the consumable end. The adhesive material layers of the two flexible connectors are connected to each other. There is a staggered area between the two flexible connectors. The adhesive material layer of one of the flexible connectors in the staggered area is used to connect the winding spool.

[0018] In one embodiment, the flexible connector connected to the end of the consumable is re-covered and connected to the end of the consumable by folding the adhesive material layer in opposite directions. After the flexible connector is folded, at least a portion of the adhesive material layer is retained for direct connection with the winding reel.

[0019] In the above solution, the flexible connector is folded and repeatedly covered on the end of the consumable, which increases the connection area between the flexible connector and the end of the consumable and improves the connection stability.

[0020] In one embodiment, the flexible connector is provided with a through-hole through which the end of the consumable passes.

[0021] In one embodiment, a first notch is provided on one side of the folded portion of the flexible connector, and the first notch communicates with the side edge of the flexible connector.

[0022] In the above scheme, the first notch of the flexible connector creates a gap on the side, which allows the flexible connector to be rolled up / folded.

[0023] In one embodiment, a flat portion is provided on the end of the consumable, and the flat portion is connected to a flexible connector.

[0024] In the above scheme, the flat part is a deformed structure of the consumable body that is flattened and widened by pressure. The flat part can increase the connection area between the consumable body and the flexible connector, thereby increasing the tightness of the connection between the consumable body and the flexible connector. Finally, the consumable body is stably connected to the winding spool through the flexible connector.

[0025] In one embodiment, the end of the consumable is provided with a second notch near the connection point with the flexible connector.

[0026] In the above solution, when using the 3D printed filament, the flexible connector on the second end needs to be removed, or the second end and the flexible connector need to be separated. The setting of the second notch makes it easy for the operator to pull and break the end of the filament from the flexible connector at the second notch.

[0027] In one embodiment, the first end is connected to the winding reel near or at the connection between the winding shaft and the side plate, and the second end is located on the side plate.

[0028] In the above scheme, the connection between the winding shaft and the side plate serves as the location of the adhesive flexible connector. During the winding process, this allows for smoother and denser winding. The optimal location for the weld is the connection between the winding shaft and the side plate.

[0029] In one embodiment, the connection methods between the first end and the second end and the winding reel are divided into three types, namely the first connection method, the second connection method and the third connection method; wherein, in the first connection method, both the first end and the second end are connected to the winding reel through flexible connectors, in the second connection method, the first end is connected to the winding reel through a flexible connector and the second end is inserted into the winding reel, and in the third connection method, the first end is inserted into the winding reel and the second end is connected to the winding reel through a flexible connector.

[0030] Another aspect of the present invention is a method for preparing 3D printing filament consumables, characterized in that the method can employ any one of three modes, namely, mode A1, mode A2, and mode A3; wherein,

[0031] The A1 mode includes the following steps:

[0032] A11. One end of the raw material extruded by the extruder is attached to the winding spool to obtain the first end of the consumable body;

[0033] A12. Starting from the first end, the raw material is wound around the winding spool to obtain the winding part;

[0034] A13. Adhere the raw material near the winding part to the winding spool to obtain the second end of the consumable body; the first end and the second end are respectively located at both ends of the winding part, and the consumable body is separated from the raw material;

[0035] The A2 mode includes the following steps:

[0036] A21. One end of the raw material extruded by the extruder is attached to the winding spool to obtain the first end of the consumable body;

[0037] A22. Starting from the first end, the raw material is wound around the winding spool to obtain the winding part;

[0038] A23. The raw material near the winding section is configured in two parts, namely a first part and a second part. The first part is connected to the winding section and is configured as the second end of the consumable body. The second end of the consumable body is inserted / welded to the winding spool. The first end and the second end are respectively located at both ends of the winding section. The first part and the second part are separate from each other.

[0039] The A3 mode includes the following steps:

[0040] A31. Insert / weld one end of the raw material extruded by the extruder to the winding reel to obtain the first end of the consumable body;

[0041] A32. Starting from the first end of the consumable body, the raw material is wound around the winding spool to obtain the winding part;

[0042] A33. Adhere the raw material near the winding part to the winding spool to obtain the second end of the consumable body; the first end and the second end are respectively located at both ends of the winding part, and the consumable body is separated from the raw material.

[0043] In the above scheme, the filamentous consumable material is extruded from the extruder and presents a continuous long strip shape. When winding the filamentous consumable material into a reel, a portion of the material is cut off for reeling. This portion of material used for reeling is the consumable body, which has a first end and a second end. This invention uses an adhesive bonding method for the ends of the consumable body, which can be divided into three bonding modes depending on the specific situation: bonding both ends of the consumable body separately, corresponding to mode A1; bonding only the first end of the consumable body, corresponding to mode A2; and bonding only the second end of the consumable body, corresponding to mode A3. In this invention, the end-bonding method is used to fix the consumable ends, ensuring that the consumable body does not loosen after reeling, which is suitable for automated production and has high production efficiency.

[0044] In one embodiment, in the method for preparing 3D printed filament consumables, the material is bonded to the winding spool specifically by bonding the material to the winding spool using a bonding device. The bonding device provides a flexible connector with adhesive properties, and the bonding device enables the flexible connector to bond the end of the consumable to the winding spool, so that the end of the consumable is bonded to the winding spool. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a 3D printed filament consumable in one embodiment;

[0046] Figure 2 This is a schematic diagram showing the connection between the consumable end of the consumable body and the flexible connector in one embodiment;

[0047] Figure 3 This is a schematic diagram of the folded portion in one embodiment;

[0048] Figure 4 This is a structural schematic diagram of a flexible connector covering the inner and outer sides of a side plate in one embodiment;

[0049] Figure 5 This is a schematic diagram of the structure of the staggered regions in one embodiment;

[0050] Figure 6 This is a schematic diagram of the folding changes of the flexible connector in one embodiment;

[0051] Figure 7 This is a schematic diagram of the consumable end passing through a perforation in one embodiment;

[0052] Figure 8 This is a schematic diagram of the structure of the first notch on the flexible connector in one embodiment;

[0053] Figure 9 yes Figure 8 Schematic diagram of two folding variations of the flexible connector;

[0054] Figure 10 This is a schematic diagram of the structure of the flat portion at the end of a consumable in one embodiment;

[0055] Figure 11 This is a schematic diagram of the structure of the second notch on the flexible connector in one embodiment. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0057] like Figures 1 to 11 As shown, the technical solution adopted in this invention is as follows: One aspect of this invention is to propose a 3D printing filament consumable, including a winding reel 1 and a consumable body 2. The consumable body 2 includes two consumable ends 3 located at its two ends, which are respectively a first end and a second end. The first end and / or the second end are connected to the winding reel 1 through a flexible connector 4. One side of the flexible connector 4 is adhesive, and the flexible connector 4 is adhered to the winding reel 1.

[0058] In the above solution, the consumable body 2 has two ends. One or both ends of the consumable body 2 are bonded to the winding reel 1 using flexible connectors 4. Unlike existing technologies that use plugs or holes to fix the filament end, this invention uses bonding, allowing the consumable end 3 to be securely fixed to the winding reel 1. This invention achieves the assembly and production of the consumable body 2 and the winding reel 1 for 3D printed filaments through bonding, making it suitable for automated assembly and production with high efficiency. The flexible connector 4, being adhesive (e.g., tape), can be used to bond the consumable end 3 to the winding reel 1, ensuring a secure bond. The flexible connector 4 can be torn off the winding reel 1, facilitating the separation of the consumable end 3 from the winding reel 1 when the 3D printed filament is needed. The consumable body 2 can then be used as raw material 10 for docking with the 3D printer for 3D printing. The first end and the second end are the beginning and end of the consumable body 2 being wound onto the winding reel 1, respectively.

[0059] In one embodiment, the winding reel 1 includes a winding shaft 5 and side plates 6 disposed at both ends of the winding shaft 5. The first end is connected to the outer surface of the winding shaft 5 and / or the inner surface of the side plate 6 by a flexible connector 4.

[0060] In the above scheme, the first end can be bonded to the winding reel 1. When the first end is only bonded to the winding shaft 5, it does not mean that the first end cannot contact the side plate 6. Similarly, when the first end is only bonded to the side plate 6, it does not mean that the first end cannot contact the winding shaft 5. The first end refers to the end portion, not specifically the endpoint. When the first end is connected to the winding reel 1 by the flexible connector 4, the flexible connector 4 can be arranged only on the outer surface of the winding shaft 5; it can also be arranged only on the inner surface of the side plate 6; or it can be arranged simultaneously on both the outer surface of the winding shaft 5 and the inner surface of the side plate 6. That is, a portion of the flexible connector 4 is arranged at the connection point between the winding shaft 5 and the side plate 6.

[0061] In one embodiment, the winding reel 1 includes a winding shaft 5 and side plates 6 disposed at both ends of the winding shaft 5, with the second end connected to the inner surface of the side plate 6 via a flexible connector 4.

[0062] In the above scheme, the second end can be glued to the side plate 6, wherein the second end refers to the end portion, not specifically the endpoint.

[0063] In one embodiment, the flexible connector 4 includes a toughening layer 7 and an adhesive material layer 8 disposed on one side of the toughening layer 7. The adhesive material layer 8 is adhesive, the consumable end 3 is connected to the adhesive material layer 8, and the winding reel 1 is connected to the flexible connector 4 through the adhesive material layer 8.

[0064] In the above scheme, the adhesive material layer 8 is sticky and mainly composed of adhesive materials such as glue. However, the adhesive material layer 8 has low toughness. Therefore, the toughening layer 7 is designed to both allow the adhesive material to adhere and to give the flexible connector 4 better toughness. The toughening layer 7 is a material layer that increases toughness. The toughening layer 7 has a smoother surface and is less sticky than the adhesive material layer 8. Conventionally, when the flexible connector 4 is adhesive tape, the adhesive material layer 8 is the sticky side, and the toughening layer 7 is on the other side of the adhesive material layer 8, and they are separate layers.

[0065] In one embodiment, the flexible connector 4 is provided with a folded portion 9 at its middle or end, the folded portion 9 being formed by bonding the adhesive material layers 8 together.

[0066] In the above scheme, such as Figure 3 As shown, the folded part 9 is used as a handhold for separating the flexible connector 4 from the winding reel 1, or as a pre-reserved handle for easily tearing the flexible connector 4 off the winding reel 1.

[0067] In one embodiment, the flexible connector 4 includes a first part 41, a second part 42 and a third part 43 connected together. The first part 41 is connected to the inner side surface of the side plate 6, the third part 43 is connected to the outer side surface of the side plate 6, the second part 42 is connected to the outer edge end face of the side plate 6, and the second end is located between the first part 41 and the inner side surface of the side plate 6.

[0068] In the above scheme, such as Figure 4 As shown, the flexible connector 4 covers the inner and outer sides of the side plate 6, which increases the tightness of the connection between the flexible connector 4 and the winding spool 1. In addition, it can also make the second end more securely connected to the side plate 6 by the flexible connector 4.

[0069] In one embodiment, the first portion 41 of the flexible connector 4 is provided with a protruding placement position 44 adapted to the second end. The protruding placement position 44 is recessed from the adhesive material layer 8 toward the toughening layer 7, such as... Figure 4 As shown.

[0070] In one embodiment, two flexible connectors 4 are provided on the outside of the consumable end 3. Each flexible connector 4 is connected to the consumable end 3. The adhesive material layers 8 of the two flexible connectors 4 are connected facing each other, and there is a staggered region 45 between the two flexible connectors 4. The adhesive material layer 8 of one of the flexible connectors 4 at the staggered region 45 is used to connect to the winding reel 1. Figure 5 As shown.

[0071] In one embodiment, the flexible connector 4 connected to the consumable end 3 is covered and connected to the consumable end 3 again by folding the adhesive material layer 8 in opposite directions. After the flexible connector 4 is folded, at least a portion of the adhesive material layer 8 is retained for direct connection with the winding reel 1.

[0072] In the above scheme, such as Figure 6 As shown, the flexible connector 4 is folded and repeatedly covered on the end of the consumable 3, which increases the connection area between the flexible connector 4 and the end of the consumable 3 and improves the connection stability.

[0073] In one embodiment, the flexible connector 4 is provided with a through hole for the consumable end 3 to pass through, such as... Figure 7 As shown.

[0074] In one embodiment, a first notch 46 is provided on one side of the folded portion of the flexible connector 4, and the first notch 46 communicates with the side edge of the flexible connector 4.

[0075] In the above scheme, such as Figure 8 As shown, the first notch 46 of the flexible connector 4 creates a gap on its side, which allows the flexible connector 4 to be rolled up / folded easily.

[0076] In one embodiment, a flat portion 13 is provided on the end of the consumable 3, and the flat portion 13 is connected to the flexible connector 4.

[0077] In the above scheme, such as Figure 10 As shown, the flat part 13 is a deformed structure of the consumable body 2 after being compressed, flattened and widened. The flat part 13 can increase the connection area between the consumable body 2 and the flexible connector 4, thereby increasing the tightness of the connection between the consumable body 2 and the flexible connector 4. Finally, the consumable body 2 is stably connected to the winding reel 1 through the flexible connector 4.

[0078] In one embodiment, the consumable end 3 is provided with a second notch 14 near the connection point with the flexible connector 4.

[0079] In the above solution, when using the 3D printed filament, the flexible connector 4 on the second end needs to be removed, or the second end needs to be separated from the flexible connector 4. The second notch 14 allows the operator to easily pull the filament end 3 away from the flexible connector 4 at the second notch 14. Figure 11 As shown.

[0080] In one embodiment, the first end is connected to the winding reel 1 near or at the connection between the winding shaft 5 and the side plate 6, and the second end is located on the side plate 6.

[0081] In the above scheme, the connection between the winding shaft 5 and the side plate 6 serves as the location for the adhesive flexible connector 4. During the winding process, this allows for smoother and denser winding. The optimal location for the weld is the connection between the winding shaft 5 and the side plate 6.

[0082] In one embodiment, the connection between the first end and the second end and the winding reel 1 is divided into three types: the first connection type, the second connection type, and the third connection type. In the first connection type, both the first end and the second end are connected to the winding reel 1 through flexible connectors 4. In the second connection type, the first end is connected to the winding reel 1 through flexible connectors 4, and the second end is inserted into the winding reel 1. In the third connection type, the first end is inserted into the winding reel 1, and the second end is connected to the winding reel 1 through flexible connectors 4.

[0083] Another aspect of the present invention is a method for preparing 3D printing filament consumables, characterized in that the method can employ any one of three modes, namely, mode A1, mode A2, and mode A3; wherein,

[0084] The A1 mode includes the following steps:

[0085] A11. One end of the raw material 10 extruded by the extruder is attached to the winding spool 1 to obtain the first end of the consumable body 2;

[0086] A12. Starting from the first end, the raw material 10 is wound onto the winding spool 1 to obtain the winding part 15;

[0087] A13. The raw material 10 near the winding part 15 is bonded to the winding spool 1 to obtain the second end of the consumable body; the first end and the second end are respectively provided at both ends of the winding part 15, and the consumable body 2 is separated from the raw material 10.

[0088] The A2 mode includes the following steps:

[0089] A21. One end of the raw material 10 extruded by the extruder is attached to the winding spool 1 to obtain the first end of the consumable body 2;

[0090] A22. Starting from the first end, the raw material 10 is wound onto the winding spool 1 to obtain the winding part 15;

[0091] A23. The raw material 10 near the winding part 15 is configured in two parts, namely a first part and a second part. The first part is connected to the winding part 15 and is configured as the second end of the consumable body 2. The second end of the consumable body 2 is inserted / welded to the winding reel 1. The first end and the second end are respectively located at both ends of the winding part 15. The first part and the second part are separate from each other.

[0092] The A3 mode includes the following steps:

[0093] A31. Insert / weld one end of the raw material 10 extruded by the extruder to the winding reel 1 to obtain the first end of the consumable body 2;

[0094] A32. Starting from the first end of the consumable body 2, the raw material 10 is wound around the winding spool 1 to obtain the winding part 15.

[0095] A33. The raw material 10 near the winding part 15 is bonded to the winding spool 1 to obtain the second end of the consumable body 2; the first end and the second end are respectively provided at both ends of the winding part 15, and the consumable body 2 is separated from the raw material 10.

[0096] In the above scheme, the filamentous consumable material 10 is extruded from the extruder and presents a continuous long strip shape. When winding the filamentous consumable material into a reel, a portion of the material 10 is cut off for reeling. This portion of the material 10 used for reeling is the consumable body 2, which has a first end and a second end. This invention adopts the method of bonding the ends of the consumable body 2, which can be divided into three bonding modes according to specific situations: bonding both ends of the consumable body 2 separately, corresponding to mode A1; bonding only the first end of the consumable body 2, corresponding to mode A2; and bonding only the second end of the consumable body 2, corresponding to mode A3. In this invention, the consumable end 3 is fixed by bonding the ends, so that the consumable body 2 is not loose after reeling, which is suitable for automated production and has high production efficiency.

[0097] In one embodiment, in the method for preparing 3D printed filament consumables, the material 10 is bonded to the winding reel 1 by means of a bonding device. The bonding device provides a flexible connector 4 with adhesive properties. The bonding device can be configured with a robot arm to bond the flexible connector 4 to the end of the consumable 3 and the winding reel 1, so that the end of the consumable 3 is bonded to the winding reel.

Claims

1. A 3D printing filamentary consumable comprising a spool (1) and a consumable body (2), the consumable body (2) comprising two consumable ends (3) at opposite ends of the consumable body (2), the two consumable ends (3) being a first end and a second end, respectively, characterized in that: The first end is connected with the winding disc (1) through the flexible connecting piece (4); one side of the flexible connecting piece (4) is provided with adhesion, and the flexible connecting piece (4) is adhered to the winding disc (1); the winding disc (1) comprises a winding shaft (5) and side plates (6) arranged at two ends of the winding shaft (5), and the first end is connected to the outer surface of the winding shaft (5) through the flexible connecting piece (4); the flexible connecting piece (4) comprises a toughened layer (7) and an adhesive material layer (8) arranged on one side of the toughened layer (7), the adhesive material layer (8) is provided with adhesion, the consumable end (3) is connected to the adhesive material layer (8), and the winding disc (1) is connected with the flexible connecting piece (4) through the adhesive material layer (8); the flexible connecting piece (4) connected with the consumable end (3) is connected to the consumable end (3) again in a mode that the adhesive material layers (8) of the flexible connecting pieces (4) are folded towards each other, and at least part of the adhesive material layer (8) of the flexible connecting piece (4) after folding is reserved for direct connection with the winding disc (1); a first notch (46) is arranged on one side of the folding part of the flexible connecting piece (4), the first notch (46) is communicated with the side edge of the flexible connecting piece (4); the consumable end (3) is provided with a flat part (13) connected to the flexible connecting piece (4); and the consumable end (3) is provided with a second notch (14) near the connection with the flexible connecting piece (4).

2. The 3D printing filamentous consumable according to claim 1, characterized in that: The winding disc (1) comprises a winding shaft (5) and side plates (6) arranged at two ends of the winding shaft (5), and the second end is connected to the inner side of the side plate (6) through the flexible connecting piece (4); the flexible connecting piece (4) comprises a first part (41), a second part (42) and a third part (43) connected together, the first part (41) is connected with the inner side of the side plate (6), the third part (43) is connected with the outer side of the side plate (6), the second part (42) is connected with the outer edge end surface of the side plate (6), and the second end is located between the first part (41) and the inner side of the side plate (6); the first part (41) of the flexible connecting piece (4) is provided with a protruding placement position (44) matched with the second end, the protruding placement position (44) is recessed from the adhesive material layer (8) to the toughened layer (7); the outer part of the consumable end (3) is provided with two flexible connecting pieces (4), the two flexible connecting pieces (4) are connected to the consumable end (3) respectively, the adhesive material layers (8) of the two flexible connecting pieces (4) are connected towards each other, and the two flexible connecting pieces (4) have a staggered area (45) staggered with each other, and the adhesive material layer (8) of one of the flexible connecting pieces (4) in the staggered area (45) is used for connecting the winding disc (1).

3. The 3D printing filamentous consumable according to claim 1, characterized in that: The middle part or the end of the flexible connecting piece (4) is provided with a folding part (9) formed by mutual adhesion of the adhesive material layer (8); the flexible connecting piece (4) is provided with a through hole for the consumable end (3) to pass through, and the consumable end (3) passes through the through hole; the connection between the first end and the winding disc (1) is close to or located at the connection between the winding shaft (5) and the side plate (6), and the second end is located on the side plate (6).

4. A method for the preparation of a 3D printing filamentary consumable for the preparation of a 3D printing filamentary consumable according to any one of claims 1 to 3, characterized in that, The method comprises the following steps: A11, bonding one end of the material (10) extruded by the extruder to the bobbin (1) to obtain a first end portion of the consumable body (2); A12, winding the material (10) on the bobbin (1) starting from the first end portion to obtain a winding portion (15); A13, bonding the material (10) close to the winding portion (15) to the bobbin (1) to obtain a second end portion of the consumable body; the first end portion and the second end portion are respectively arranged at two ends of the winding portion (15), and the consumable body (2) is separated from the material (10).

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