Powder scattering assembly, baking equipment and printing system

Abstract

The utility model discloses a powder scattering assembly, baking equipment and a printing system. The powder scattering assembly comprises a powder scattering mechanism, a powder storage mechanism and a powder circulating mechanism. The powder scattering mechanism is used for scattering hot melt adhesive powder to a membrane material, the powder storage mechanism is arranged below the powder scattering mechanism, and a powder recovery opening facing the powder scattering mechanism is formed in the powder storage mechanism and used for storing the hot melt adhesive powder; at least part of the powder circulating mechanism is arranged in the powder storage mechanism, is opposite to at least part of the powder scattering mechanism and is used for circularly moving between the powder scattering mechanism and the powder storage mechanism, carrying part of the hot melt adhesive powder in the powder storage mechanism and transferring at least part of the hot melt adhesive powder into the powder scattering mechanism; according to the powder scattering assembly, the hot melt adhesive powder can be automatically scattered into the membrane material, the hot melt adhesive powder can be recycled and reused, the automation degree of the baking equipment is improved, and therefore the use experience of the baking equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to a powder spreading component, a baking device and a printing system. Background Art

[0002] DTF (Direct to Film) printing involves printing an image or design directly onto a specialized film material, which is then thermally transferred to various textiles or other materials. The advantages of DTF printing lie in its high precision, rich color saturation, and excellent durability. Compared to traditional screen printing, DTF printing enables more complex patterns and colors, is easy to operate, and offers high production efficiency. Furthermore, DTF printing is environmentally friendly and widely used in industries such as apparel, advertising, and gifts, offering designers and businesses greater creative freedom and production flexibility.

[0003] The DTF printing process includes inkjet printing, hot melt adhesive powder deposition, and baking. In related technologies, hot melt adhesive powder deposition and baking can be achieved through baking equipment. This process often results in excess hot melt adhesive powder and hot melt adhesive powder that has not adhered to the film material. A dedicated storage box is used to recycle unused hot melt adhesive powder. The recycled hot melt adhesive powder needs to be manually added to the powder storage bin, which is a frequent operation and a poor user experience. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a powder sprinkling component, a baking device and a printing system, aiming to realize the automated operation of powder sprinkling and powder recovery of the powder sprinkling component.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] On the one hand, the present application discloses a powder sprinkling assembly, including a powder sprinkling mechanism, a powder storage mechanism and a powder circulation mechanism; the powder sprinkling mechanism is used to sprinkle hot melt adhesive powder onto a film material; the powder storage mechanism is used to store hot melt adhesive powder, the powder storage mechanism is arranged below the powder sprinkling mechanism, and the powder storage mechanism is formed with a powder recovery port facing the powder sprinkling mechanism; the powder circulation mechanism is at least partially arranged in the powder storage mechanism, and is opposite to at least part of the powder sprinkling mechanism, and is used to circulate between the powder sprinkling mechanism and the powder storage mechanism, and carry out part of the hot melt adhesive powder in the powder storage mechanism, and transfer at least part of the part of the hot melt adhesive powder to the powder sprinkling mechanism.

[0007] In some embodiments of the present application, the powder sprinkling mechanism includes a powder sprinkling bin, a powder sprinkling roller and a third motor; the powder sprinkling bin is used to store the hot melt adhesive powder sprinkled by the powder circulation mechanism, and a powder sprinkling port is provided at the bottom of the powder sprinkling bin; the powder sprinkling roller is provided at the powder sprinkling port and extends along the length direction of the powder sprinkling port; the third motor is transmission-connected to the powder sprinkling roller, and is used to drive the powder sprinkling roller to rotate so as to sprinkle the hot melt adhesive powder in the powder sprinkling bin through the powder sprinkling port.

[0008] In some embodiments of the present application, a powder groove is provided on the surface of the powder sprinkling roller, and the powder groove extends along the axial direction of the powder sprinkling roller. When the powder sprinkling roller rotates, the powder groove can bring out the hot melt adhesive powder in the powder sprinkling bin to sprinkle the hot melt adhesive powder through the powder sprinkling port.

[0009] In some embodiments of the present application, the powder sprinkling mechanism also includes a powder scraping piece, which is arranged in the powder sprinkling bin and close to the powder sprinkling port. The powder scraping piece is in contact with the powder sprinkling roller so that when the powder sprinkling roller rotates, it extends into the powder trough and scrapes out the hot melt adhesive powder in the powder trough, so that the hot melt adhesive powder falls into the powder sprinkling port.

[0010] In some embodiments of the present application, there are two powder scrapers, which are respectively arranged at an angle at the two ends of the powder sprinkling port and in opposite directions, and respectively abut against the two sides of the powder sprinkling roller in the radial direction; and / or, the powder scraper is a brush, and the brush includes a soft part that contacts the powder sprinkling roller, and the soft part can be deformed as the powder sprinkling roller rotates to scrape off the hot melt adhesive powder in the powder trough.

[0011] In some embodiments of the present application, the powder storage mechanism includes a powder storage bin and a powder adding bin; the powder storage bin is used to store hot melt adhesive powder, and the powder storage bin is provided with the powder recovery port; the powder adding bin is rotatably and pullably installed in the powder storage bin, and is used to store hot melt adhesive powder, and the powder adding bin has a powder unloading port, so that the hot melt adhesive powder in the powder adding bin can be poured into the powder storage bin through the powder unloading port.

[0012] In some embodiments of the present application, the powder storage mechanism also includes a fourth sensor, which is arranged in the powder storage bin and is used to detect the capacity of the hot melt adhesive powder in the powder storage bin; and / or, the powder storage mechanism also includes a sleeve arranged in the powder storage bin, which can rotate relative to the powder storage bin, and the sleeve abuts against the lower outer side surface of the powder adding bin to support the powder adding bin.

[0013] In some embodiments of the present application, the powder storage bin includes a powder recovery part and a powder storage part, the powder recovery part is arranged above the powder storage part, the upper end of the powder recovery part forms the powder recovery port, and the bin width of at least part of the powder recovery part and the bin width of at least part of the powder storage part gradually decrease from top to bottom.

[0014] In some embodiments of the present application, grids are provided in the powder recovery section, and the grids are respectively connected to the inner walls of the powder recovery section.

[0015] In some embodiments of the present application, the powder storage bin is provided with a first through hole, and the powder adding bin is provided through the first through hole and inserted into the powder storage bin;

[0016] A third limiting protrusion is formed on the side wall of the powder adding bin, and the protruding direction of the third limiting protrusion is consistent with the opening direction of the powder adding bin; a first notch is formed on the upper part of the first through hole, and the third limiting protrusion is correspondingly adapted to the first notch.

[0017] In some embodiments of the present application, a first limiting protrusion and a second limiting protrusion are formed on the inner wall of the powder storage bin, the first limiting protrusion is arranged at the upper part of the first through hole, and the second limiting protrusion is arranged at the lower part of the first through hole, and the powder adding bin has a first position and a second position relative to the powder storage bin; when the powder adding bin is in the first position, the powder adding bin is arranged corresponding to the third limiting protrusion, and the third limiting protrusion abuts against the first limiting protrusion; when the powder adding bin is in the second position, the third limiting protrusion abuts against the second limiting protrusion, and the powder unloading port is connected to the powder storage bin to pour the hot melt adhesive powder in the powder adding bin into the powder storage bin.

[0018] In some embodiments of the present application, the powder circulation mechanism includes a transmission structure, a fourth motor and a powder circulation synchronous belt, the transmission structure includes a driving wheel and multiple driven wheels, the driving wheel and the driven wheels are respectively arranged in the circulation direction of the powder circulation synchronous belt, and are transmission connected to the powder circulation synchronous belt; the fourth motor is transmission connected to the driving wheel to drive the driving wheel to rotate; the powder circulation synchronous belt is transmission connected to the driving wheel and the multiple driven wheels, and forms a circulation loop between the powder sprinkling mechanism and the powder storage mechanism, part of the powder circulation synchronous belt is arranged above the powder sprinkling mechanism, and part of the powder circulation synchronous belt is arranged in the powder storage mechanism, and the powder circulation synchronous belt is used to carry out part of the hot melt adhesive powder in the powder storage mechanism to transfer it to the powder sprinkling component.

[0019] In some embodiments of the present application, the powder circulation synchronous belt includes a main body and a plurality of protrusions arranged on the outside of the main body. The inner side of the main body is transmission-connected to the transmission structure. The plurality of protrusions are arranged at intervals, and a powder space is formed between two adjacent protrusions. The powder space is used to carry hot melt adhesive powder.

[0020] In some embodiments of the present application, the powder circulation mechanism also includes a powder unloading part, which is arranged above the powder sprinkling bin of the powder sprinkling mechanism and located on the outside of the powder circulation synchronous belt, and at least one is arranged along the length direction of the powder sprinkling. The powder unloading part is used to unload the hot melt adhesive powder carried on the powder circulation synchronous belt during the movement of the powder circulation synchronous belt, so that the hot melt adhesive powder falls into the powder sprinkling bin.

[0021] The powder sprinkling assembly also includes a powder slapping mechanism, which is arranged between the powder sprinkling mechanism and the powder storage mechanism. On the conveying path of the film material, the powder slapping mechanism is located downstream of the powder sprinkling mechanism. The powder slapping mechanism is used to slap the film material after the hot melt adhesive powder is sprinkled to shake off the hot melt adhesive powder that is not adhered to the film material.

[0022] In some embodiments of the present application, the powder-beating mechanism includes a rotating shaft, a beating member and a fifth motor; the beating member is configured with at least one, and the beating member is arranged on the rotating shaft and extends radially along the rotating shaft; the fifth motor is transmission-connected to the rotating shaft, and is used to drive the rotating shaft to rotate forward and reverse, so that the beating member intermittently beats the film material after spreading the hot melt adhesive powder.

[0023] On the other hand, the present application further provides a baking device, comprising a powder sprinkling assembly as described in any one of the above items.

[0024] Another aspect of the present application provides a printing system, which includes a printer and the baking device as described above; the printer is used to print patterns on a film material, and the baking device is arranged downstream of the printer to bake the film material on which the pattern is printed by the printer.

[0025] Beneficial effects:

[0026] The powder sprinkling assembly provided in the present application arranges a powder storage mechanism below the powder sprinkling mechanism and is provided with a powder recovery port facing the powder sprinkling mechanism. The excess hot melt adhesive powder dropped from the powder sprinkling mechanism can be recovered into the powder storage mechanism through the powder recovery port, without the need for an additional powder recovery container, thereby simplifying the volume of the equipment; in addition, a powder circulation mechanism is provided to circulate between the powder storage mechanism and the powder sprinkling mechanism, so that the hot melt adhesive powder in the powder storage mechanism can be automatically added to the powder sprinkling mechanism, thereby realizing automatic powder sprinkling of the equipment and automatic recovery and reuse of the powder, reducing labor costs and improving the user experience.

[0027] The baking equipment provided in the present application realizes automatic sprinkling and recycling of hot melt adhesive powder during the sprinkling process by adopting the above-mentioned powder sprinkling component, and improves the compactness of the whole machine and reduces the limitation of the use site.

[0028] The printing system provided in the present application has a high degree of automation by connecting the above-mentioned baking equipment with the printer, thereby improving the convenience of recycling the hot melt adhesive powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a printing system provided in one embodiment of the present application.

[0030] Figure 2 This is a schematic structural diagram of a baking device provided in one embodiment of the present application from a first perspective.

[0031] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0032] Figure 4 This is a schematic diagram of the internal structure of a baking device provided in one embodiment of the present application from a first perspective.

[0033] Figure 5 This is a schematic diagram of the internal structure of the baking equipment provided in one embodiment of the present application from a second perspective.

[0034] Figure 6 This is a schematic structural diagram of a powder spreading assembly and a buffer assembly provided in one embodiment of the present application.

[0035] Figure 7 A schematic structural diagram of a buffer assembly provided in one embodiment of the present application.

[0036] Figure 8 This is a schematic structural diagram of a transmission component from a first perspective provided in one embodiment of the present application.

[0037] Figure 9 This is a structural schematic diagram of the transmission component provided in one embodiment of the present application from a second perspective.

[0038] Figure 10 for Figure 9 Magnified view of area C in .

[0039] Figure 11 for Figure 3 Magnified view of area B in FIG.

[0040] Figure 12 This is a schematic structural diagram of a powder spreading mechanism provided in one embodiment of the present application.

[0041] Figure 13 This is a schematic structural diagram of a powder spreading roller provided in one embodiment of the present application.

[0042] Figure 14 This is a schematic structural diagram of a powder spreading assembly provided in one embodiment of the present application from a first perspective.

[0043] Figure 15 This is a structural schematic diagram of the baking equipment provided in one embodiment of the present application from a second perspective.

[0044] Figure 16 A schematic diagram of the internal structure of a powder spreading assembly provided in one embodiment of the present application.

[0045] Figure 17 This is a schematic structural diagram of a powder spreading assembly provided in one embodiment of the present application from a second viewing angle.

[0046] Figure 18 for Figure 17 Cross-sectional view along the EE direction.

[0047] Figure 19 This is a schematic structural diagram of a baking assembly provided in one embodiment of the present application.

[0048] Figure 20 for Figure 19 Cross-sectional view along DD direction.

[0049] Description of main component symbols:

[0050] 01-baking equipment; 02-printer; 1-housing; 11-feeding port; 12-powder adding port; 13-frame; 14-side panel; 2-buffer assembly; 21-swinging member; 211-feeding surface; 2111-first conveying sub-surface; 2112-second conveying sub-surface; 212-pressing part; 213-powder leakage hole; 214-avoidance groove; 22-second motor; 23-second sensor; 24-bracket; 241-mounting plate; 25-limiting member; 26-third sensor; 27-first sensor; 3-powder spreading assembly; 31-powder spreading mechanism; 311-powder spreading bin; 3111-reinforcement rib; 313-powder spreading roller; 3131-powder trough; 314 - third motor; 315 - powder scraper; 32 - powder storage mechanism; 321 - powder storage bin; 321a - powder recovery unit; 321b - powder storage unit; 3211 - powder guide groove; 3212 - first limiting protrusion; 3213 - second limiting protrusion; 3214 - first through hole; 32141 - first notch; 3215 - powder recovery port; 3216 - sleeve; 322 - powder adding bin; 3222 - third limiting protrusion; 323 - fourth sensor; 324 - rebound member; 325 - grid; 33 - powder circulation mechanism; 331 - powder circulation synchronous belt; 3311 - protrusion; 3312 - main body; 332 - fourth motor; 333 - tensioner Structure; 3331-tensioning member; 3332-tensioning screw; 334-powder unloading member; 335-transmission structure; 3351-driving wheel; 3352-driven wheel; 4-powder slapping mechanism; 341-fifth motor; 342-rotating shaft; 343-slapping member; 3431-clamping body; 3432-flexible member; 4-transmission assembly; 41-transmission mechanism; 411-conveyor belt; 411a-first sub-conveyor belt; 411b-second sub-conveyor belt; 4111-boss; 412-limiting guide rail; 412a-first sub-limiting guide rail; 412a1-first guide portion; 412a2-third guide portion; 412b-second sub-limiting guide rail; 412b1 -Second guide part; 42-First motor; 44-Code disk; 45-Sixth sensor; 46-First gear; 47-Second gear; 48-Third gear; 5-Baking assembly; 51-Thermal insulation box; 511-Air outlet; 512-Aluminum foil layer; 513-Thermal insulation material layer; 514-Mirror layer; 52-Heating element; 53-Exhaust structure; 531-Exhaust fan; 532-First exhaust pipe; 533-Second exhaust pipe; 54-First fan; 55-Isolation box; 6-Powder adding cover; 7-Material receiving assembly; 71-Material receiving bin; 711 Material receiving cavity; 712 Material receiving port; 72-Guide; 8-Fifth sensor; 9-Controller; 100-Film material. DETAILED DESCRIPTION

[0051] The present application provides a powder spreading assembly, baking equipment, and printing system. To make the purpose, technical solution, and effects of the present application more clear and explicit, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only intended to explain the present application and are not intended to limit the present application.

[0052] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, it cannot be understood as a limitation on this application. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0054] Figure 1 This is a schematic diagram of the structure of the printing system provided in this application.

[0055] like Figure 1 As shown, the present application provides a printing system, which includes a printer 02 and a baking device 01. The printer 02 can be an inkjet printer, which can include a print head suitable for DTF printing. Exemplarily, the print head can be an inkjet print head, etc. The printer 02 is used to print a pattern onto a film material 100. The baking device 01 can be set on one side of the discharge port of the printer 02, and can receive the film material 100 after the pattern is printed by the printer 02, and is used to dry the pattern on the film material 100 after the pattern is printed by the printer 02, so that the pattern on the film material 100 can be transferred to other objects (such as clothes, hats, school bags, etc.).

[0056] Typically, the film 100 can be made of PET film. In one embodiment, the film 100 can be 0.75 mm thick. This material and thickness provide excellent transferability, enhancing the clarity of the pattern transferred to the product. In other embodiments, there are no specific requirements for the material or thickness of the film 100.

[0057] Figure 2 This is a schematic diagram of the structure of the baking equipment provided in this application from the first perspective.

[0058] like Figure 1 and Figure 2 As shown, the baking device 01 includes a housing 1. The housing 1 is formed with a feed port 11 suitable for the film material 100 to pass through. The film material 100 after the pattern is printed can enter the baking device 01 through the feed port 11 for operations such as dusting and baking.

[0059] Figure 3 for Figure 2 Cross-sectional view along the AA direction.

[0060] like Figure 3 As shown, in some embodiments, the housing 1 may include a frame 13 and side panels 14 fixed to the frame 13. The frame 13 forms a frame structure. The side panels 14 are arranged around the outside of the frame 13. The feed port 11 may be formed on the side panel 14 on the side of the housing 1 facing the printer 02.

[0061] like Figure 2 and Figure 3 As shown, a housing 1 is formed with a receiving cavity, and the baking device 01 further includes a buffer assembly 2, a powder sprinkling assembly 3, a conveying assembly 4, and a baking assembly 5. The buffer assembly 2, the powder sprinkling assembly 3, the conveying assembly 4, and the baking assembly 5 are respectively installed in the receiving cavity to improve the integrity of the baking device 01.

[0062] The upper outer portion of the housing 1 is formed with a mounting space for external equipment. A feed port 11 is formed within the housing 1 and is disposed correspondingly to the mounting space. The film material 100 enters the housing 1 through the feed port 11. A buffer assembly 2 is disposed between the feed port 11 and the conveyor assembly 4 to guide the film material 100 entering from the feed port 11 to the conveyor assembly 4. The conveying speed of the film material 100 can be buffered in the buffer assembly 2, thereby isolating the tension between the conveying and feeding of the film material 100, preventing the two from interfering with each other and improving the conveying efficiency of the film material 100.

[0063] The powder sprinkling assembly 3 is disposed between the feed port 11 and the conveying assembly 4, and the buffer assembly 2 is disposed within the powder sprinkling assembly 3. The powder sprinkling assembly 3 is used to receive and spread the hot melt adhesive powder onto the film material 100. When the film material 100 is buffered in the buffer assembly 2, the powder sprinkling assembly 3 can spread the hot melt adhesive powder onto the film material 100 from above and recycle any excess hot melt adhesive powder.

[0064] The conveying component 4 is used to convey the film material 100 , and the baking component 5 is provided in the conveying path of the film material 100 and is used to bake the film material 100 so that the hot melt adhesive powder melts on the film material 100 .

[0065] The above structure realizes the automatic operation of feeding, dusting, conveying and baking the film material 100, improves the baking efficiency of the film material 100, and enhances the user experience.

[0066] In some embodiments, the transmission assembly 4 includes a first transmission portion and a second transmission portion, which are interconnected. The first transmission portion extends downward from one side of the discharge port 11 along the transmission direction, and the second transmission portion is located on the side of the feed port 11 facing away from the transmission direction. A storage space is formed between the first transmission portion and the second transmission portion, and the buffer assembly 2 and the powder sprinkling assembly 3 are disposed in the storage space. The baking assembly 5 is disposed through the second transmission portion. In the above, the various components of the baking device 01 are rationally arranged, improving the compactness of the baking device 01 structure and reducing the volume of the baking device 01 without affecting the performance of the device. In addition, the transmission path of the transmission assembly 4 extends between two opposite sides of the housing 1, which provides the transmission assembly 4 with a longer transmission path, thereby increasing the appropriate time for the transmission and baking of the film material 100.

[0067] In some embodiments, the baking assembly 5 is located at the rear of the housing 1. When the device is running, the baking assembly 5 generates a certain amount of heat, which can easily make an operator feel uncomfortable if they are close to it. Positioning the baking assembly 5 at the rear of the housing 1, i.e., toward the side of the printing device, allows the operator to stay away from the baking assembly 5 during use, improving the user experience.

[0068] Figure 4 This is a schematic diagram of the internal structure of the baking equipment provided in this application from the first perspective.

[0069] like Figure 3 and Figure 4As shown, the baking device 01 also includes a material receiving assembly 7, which is arranged at the bottom of the shell 1. The material receiving assembly 7 is formed with a material receiving cavity 711 and a material receiving port 712, and the material receiving port 712 connects the material receiving cavity 71 with the second receiving cavity 17. The material receiving port 712 is opposite to the conveying assembly 4 located at the bottom of the baking assembly 5, so that the film material 100 on the conveying assembly 4 can enter the material receiving cavity 711 through the material receiving port 712. The material receiving assembly 7 provides storage space for the film material 100 after baking, eliminating the need to immediately recover the film material 100, reducing unnecessary waiting time and improving the user experience. The material receiving assembly 7 is located on the other side of the powder sprinkling assembly 3 in the width direction of the shell 1, which can effectively utilize the space of the second receiving cavity 17 and optimize the internal layout of the equipment. The material receiving assembly 7 and the baking assembly 5 are located on different sides in the width direction of the shell 1, so that when removing the film material 100 from the material receiving assembly 7, it is not necessary to approach the baking assembly 5 to avoid burns.

[0070] The drying apparatus 01 also includes a material receiving bin 71 and a guide 72. The material receiving bin 71 is detachably connected to the housing 1 and is used to store the dried film material 100. The material receiving bin 71 has a receiving cavity 711 and a receiving port 712. This allows the dried film material 100 to be automatically stored, thus achieving integrated, automated operation of the drying apparatus.

[0071] The guide 72 is provided at one end of the receiving bin 71 near the receiving port 712 to guide the film material 100 that has fallen off the conveying assembly 4 to the receiving cavity 711. The guide 72 can prevent the baked film material 100 from piling up in the receiving bin 71 near the receiving port 712. Exemplarily, the guide 72 can be an element with an inclined surface or a curved surface, or a fan, etc. In this embodiment, the guide 72 is configured as a fan, the air outlet of the fan is facing the receiving port 712, and a plurality of fans are provided, and the plurality of fans are spaced apart along the width of the film material 100 that has fallen off the conveying assembly 4, so that the film material 100 can be subjected to a more uniform driving force in the width direction, thereby being more integrally received in the receiving bin 71.

[0072] The receiving bin 7 is provided with a fifth sensor (not shown) fixed to an inner sidewall of the upper portion of the receiving bin 7. The fifth sensor is used to detect the amount of film material 100 stored in the receiving bin 7. When the amount of film material 100 in the receiving bin 7 reaches a certain level, the fifth sensor generates an alarm signal, prompting the operator to clear the film material 100 from the receiving bin 7.

[0073] Figure 5 This is a schematic diagram of the internal structure of the baking equipment provided in this application from a second perspective.

[0074] like Figure 3 and Figure 5As shown, the conveying path of the conveyor assembly 4 passes through at least two opposing surfaces of the baking assembly 5. This extends the travel distance of the film 100 through the baking assembly 5, shortening the baking time of the film 100 and improving baking efficiency. In this embodiment, the conveying path of the conveyor assembly 4 is arranged around the baking assembly 5.

[0075] like Figure 4 As shown, baking device 01 may further include a controller 9. The controller 9 may be electrically connected to the host computer and work in conjunction with the host computer. The controller 9 may be disposed within the housing 1. The controller 9 may be a PLC controller. The controller 9 is electrically connected to the buffer assembly 2, the powder spreading assembly 3, the conveying assembly 4, and the baking assembly 5, respectively, enabling centralized and unified control of the entire machine, thereby improving the accuracy of the automated control of baking device 01. The controller 9 may include a mainboard and electronic components and interfaces disposed thereon. The mainboard may be secured to the frame 11 or the side panel 14.

[0076] Figure 6 This is a schematic diagram of the structure of the powder spreading component and the buffer component provided in this application. Figure 7 This is a schematic structural diagram of the buffer assembly provided in this application.

[0077] like Figure 3 、 Figure 5 、 Figure 6 and Figure 7 As shown, the buffer assembly 2 includes a bracket 24 , which is fixed in the housing 1 and can serve as a supporting structure for the buffer assembly 2 .

[0078] The bracket 24 includes two mounting plates 241 . The two mounting plates 241 are disposed opposite to each other and are located on both sides of the conveying direction of the film material 100 .

[0079] Specifically, the buffer component 2 includes a swinging member 21, which has a grid-shaped plate structure and a powder leakage hole 213 on the swinging member 21, which can reduce the friction between the swinging member 21 and the film material 100, and the excess hot melt adhesive powder sprinkled downward by the powder sprinkling component 3 or the hot melt adhesive powder shaken off the film material 100 can fall from the powder leakage hole 213 and be recycled.

[0080] The swinging member 21 is arranged opposite to the feed port 11. After the film material 100 enters the baking equipment 01 from the feed port 11, it will be transferred to the swinging member 21. The swinging member 21 is arranged on the bracket 24 and can swing relative to the bracket 24. The swinging member 21 has a first position and a second position on the swinging trajectory. The first position can be the position of the swinging member 21 when it swings upward to the highest position, and the second position can be the swing zero position of the swinging member 21. After the swinging member 21 swings downward to the second position, it cannot swing downward anymore. That is, the swinging member 21 can swing within the range between the first position and the second position. The swinging member 21 has a feeding surface 211 with a climbing slope. When the swinging member 21 is in the first position, the two ends of the feeding surface 211 are close to the feed port 11 and the conveying component 4 respectively. When the swinging member 21 is in the second position, there is a gap between the feeding surface 211 and the feed port 11.

[0081] In the initial state, the swing member 21 is in the second position. When the film 100 enters the buffer assembly 2 from the feed inlet 11, the swing member 21 swings upward to the first position. The two ends of the swing member 21 can approach the feed inlet 11 and the conveyor assembly 4 respectively. At this time, the film 100 can pass through the feeding surface 211 of the swing member 21 and transition to the conveyor assembly 4, achieving engagement with the conveyor assembly 4. After the film 100 is fixed to the conveyor assembly 4, the swing member 21 can swing downward to the second position. At this time, the swing member 21 creates a certain amount of avoidance space for the film 100 to pass through. The film 100 can be buffered at the corresponding position of the swing member 21. Under the action of gravity, the film 100 is pressed downward to form an arc. It can be understood that there is a speed difference between the conveying speed of the film material 100 in the baking equipment 01 and the printing speed of the printer 02. The printing speed of the printer 02 is faster. The swinging member 21 swings downward to form a buffer area to avoid the accumulation of the film material 100, and enables the powder spreading component 3 to spread the hot melt adhesive powder more evenly on the film material 100, and can achieve tension isolation between the baking equipment 01 and the printer 02.

[0082] like Figure 6 As shown, the feed surface 211 includes a first conveying sub-surface 2111 and a second conveying sub-surface 2112 connected to each other. Both the first conveying sub-surface 2111 and the second conveying sub-surface 2112 are curved surfaces. The first conveying sub-surface 2111 is closer to the feed port 11 than the second conveying sub-surface 2112. The tangent angle of the first conveying sub-surface 2111 gradually increases, while the tangent angle of the second conveying sub-surface 2112 gradually decreases. The curved surfaces formed by the first and second conveying sub-surfaces 2111 and 2112 can, to a certain extent, mitigate the conveying speed of the film 100 entering from the printing end.

[0083] Figure 7 This is a schematic structural diagram of the buffer assembly provided in this application.

[0084] In some embodiments, a pressing portion 212 is formed on the swinging member 21. The pressing portion 212 is formed on both sides of the swinging member 21 along the transmission direction and protrudes toward the inside of the swinging member 21. A gap suitable for the film material 100 to pass through is formed between the pressing portion 212 and the conveying surface 211, which can produce a certain guiding effect on the conveying of the film material 100.

[0085] The buffer assembly 2 includes a second motor 22. The second motor 22 is disposed on the bracket 24 and is in transmission connection with the swing member 21, and is used to drive the swing member 21 to swing.

[0086] like Figure 3 and Figure 6 As shown, the swing member 21 is disposed between two mounting plates 241 and is rotatable relative to the mounting plates 241. The mounting plates 241 are provided with connection holes, and one end of the swing member 21 is rotatably connected to the connection hole on one of the mounting plates 241 via a shaft. The output shaft of the second motor 22 is inserted through the connection hole of the other mounting plate 241 and is in driving connection with the other end of the swing member 21, thereby enabling the swing member 21 to rotate. Furthermore, the second motor 22 is connected to one end of the swing member 21 in the conveying direction, allowing the swing member 21 to achieve a larger swing amplitude.

[0087] like Figure 3 As shown, the buffer assembly 2 includes a first sensor 27, which is arranged behind the swing member 21 along the conveying direction and can be connected to the end of the conveying assembly 4 near the buffer assembly 2. The first sensor 27 is used to detect whether the film material 100 has reached the conveying assembly 4. When the first sensor 43 detects that the film material 100 has been connected to the conveying assembly 4 from the buffer assembly 2, the second motor 22 controls the swing member 21 to swing downward to the second position, so that the film material 100 is buffered at the position of the buffer assembly 2, forming a downward curved arc, preventing the film material 100 from piling up, thereby allowing the powder sprinkling assembly 3 to evenly sprinkle powder on the film material 100.

[0088] The buffer assembly 2 includes a second sensor 23. The second sensor 23 is oriented toward the swing member 21 and is used to detect the position of the swing member 21 and determine whether the swing member 21 has swung to the first position. In this embodiment, the second sensor 23 is located on the side of the buffer assembly 2 facing the feed inlet 11 and is fixed to the mounting plate 241. The first position is within the sensing range of the second sensor 23. The short distance between the second sensor 23 and the first position improves the response speed of the second sensor 23.

[0089] When the swing member 21 swings to the first position, the second sensor 23 can generate an excitation signal, the second motor 22 stops rotating, and the film material 100 passes through the feeding surface 211 of the swing member 21 and enters the conveying component 4. At this time, the feeding surface 211 of the swing member 21 can contact the passing film material 100, supporting the film material 100, so that the film material 100 can smoothly enter the conveying component 4.

[0090] like Figure 6 As shown, the buffer assembly 2 further includes a third sensor 26. The third sensor 26 is disposed below the first position and on a side of the swing member 21 near the feed port 211. The third sensor 26 is configured to detect whether the film 100 has drooped to the lower limit when the swing member 21 is in the second position, thereby responding to the controller, coordinating the start and stop of the conveying assembly 4, and adjusting the conveying speed of the film 100.

[0091] In the above description, when the film 100 is connected and fixed to the conveyor assembly 4, the second motor 22 rotates in the opposite direction, controlling the swing member 21 to swing downward, and the conveyor assembly 4 stops conveying the film 100. Under the pushing action of the printer 02, the film 100 is buffered in the buffer assembly 2 and sags, forming a downward curvature. When the film 100 bends to a certain degree, the lower limit position of the film 100 triggers the third sensor 26, and the conveyor assembly 4 starts to convey the film 100 downstream. When the lower limit position of the film 100 is out of the sensing range of the third sensor 26, the conveyor assembly 4 stops, and the film 100 once again forms a downward curvature in the buffer assembly 2. This cycle repeats, achieving automatic feeding of the film 100.

[0092] In some embodiments, the first sensor 27 , the second sensor 23 , and the third sensor 26 may be photoelectric sensors or other types of sensors. The first sensor 27 , the second sensor 23 , and the third sensor 26 are electrically connected to the controller 9 , respectively.

[0093] In some embodiments, to further limit the position of the swinging member 21, a limiter 25 is provided on at least one mounting plate 24. The limiter 25 is disposed on the side of the mounting plate 24 facing the swinging member 21. The limiter 25 protrudes from the surface of the mounting plate 24 and serves to limit the swinging range of the swinging member 21. When the swinging member 21 swings upward to the first position, the limiter 25 abuts against the swinging member 21 to restrict further upward swinging of the swinging member 21. This ensures that the film 100 can be smoothly connected to the conveying assembly 4 when the limiter 25 swings upward.

[0094] like Figure 3 and Figure 5As shown, in some embodiments, the conveyor assembly 4 is disposed downstream of the buffer assembly 2 and is used to convey the film material 100 to the baking assembly 5. The conveyor assembly 4 can fix the edges of the film material 100 along the conveying direction. The movement of the conveyor assembly 4 can drive the film material 100 to the downstream assembly, thereby enabling the film material 100 to be conveyed without the need for traction by conveyor rollers. This allows the conveyor assembly 4 to convey single films 100 with a relatively short width, thereby improving the flexibility of the baking apparatus 01 and reducing the waste of the film material 100.

[0095] Figure 8 This is a structural schematic diagram of the transmission component provided in this application from the first perspective. Figure 9 This is a structural schematic diagram of the transmission component provided in this application from a second perspective.

[0096] like Figure 3 、 Figure 5 、 Figure 8 and Figure 9 As shown, the conveying assembly 4 further includes a conveying mechanism 41 and a first motor 42. The first motor 42 is in transmission connection with the conveying mechanism 41 and is used to drive the conveying assembly 4 to move so as to convey the film material 100 on the conveying assembly 4 to the baking assembly 5.

[0097] The film 100 can be fixed on the conveying mechanism 41. The conveying mechanism 41 is provided with a plurality of fixing parts, which are respectively distributed on both sides of the conveying direction of the film 100 on the conveying mechanism 41. The edges of the film 100 on both sides along the conveying direction can be fixed to the fixing parts respectively.

[0098] In some embodiments, the conveying mechanism 41 includes a conveyor belt 411 and a limiting guide rail 412. The conveyor belt 411 can be a synchronous belt. The synchronous belt has high transmission accuracy and good transmission stability, which can ensure that the film material 100 can be stably conveyed.

[0099] Two sets of conveyor belts 411 are configured. These two sets of conveyor belts 411 are positioned opposite each other and connected by a drive shaft. This improves the transmission consistency of the two sets of conveyor belts 411, thereby enhancing the transmission stability of the conveyor mechanism 41 and eliminating the need for two first motors 42. The edges of the film 100 along the conveying direction can be fixed to the conveyor belts 411 and move with the conveyor belts 411.

[0100] Furthermore, the conveyor belt 411 includes a first sub-conveyor belt 411a and a second sub-conveyor belt 411b. The first sub-conveyor belt 411a is disposed between the buffer assembly 2 and the baking assembly 5 and is used to convey the film 100 from the buffer assembly 2 to the front of the baking assembly 5. The second sub-conveyor belt 411b is wound around the baking assembly 5 and is used to convey the film 100 along the circumference of the baking assembly 5. Specifically, the second sub-conveyor belt 411b passes over all three surfaces of the baking assembly 5 at least once, extending the travel distance of the film 100 through the baking assembly 5 and improving the baking and printing effects. The first sub-conveyor belt 411a and the second sub-conveyor belt 411b rotate synchronously.

[0101] The first sub-conveyor belt 411a is connected via multiple idler pulleys. Specifically, the portion of the first sub-conveyor belt 411a located in front of the buffer assembly 2 is connected to an idler pulley, which changes the conveying direction and extends downward to the lower portion of the housing 1. It is then connected to another idler pulley, changing its conveying direction to extend obliquely downward and backward. A third idler pulley then changes the conveying direction to its initial position. The second sub-conveyor belt 411b is connected and turned via four idler pulleys, resulting in a roughly rectangular conveying trajectory for the second sub-conveyor belt 411b.

[0102] The first sub-conveyor belt 411a and the second sub-conveyor belt 411b are close to each other at the bottom of the shell 1, and the rotation directions of the first sub-conveyor belt 411a and the second sub-conveyor belt 411b are opposite. For example, the first sub-conveyor belt 411a rotates clockwise to convey the film material 100 to a position close to the second sub-conveyor belt 411b, and the second sub-conveyor belt 411b rotates counterclockwise. In this way, under the rotation of the first sub-conveyor belt 411a and the second sub-conveyor belt 411b, the film material 100 can be transferred to a position where the first sub-conveyor belt 411a and the second sub-conveyor belt 411b are close to each other.

[0103] The conveyor belt 411 is set as the first sub-conveyor belt 411a and the second sub-conveyor belt 411b, which can optimize the conveying direction of the conveyor belt within a limited space, reduce the frequency of changing the transmission angle of the single-section conveyor belt, improve the stability of the film material 100 transmission, facilitate the layout of the positions of each component, and improve the compactness of the overall structure, thereby reducing the volume of the overall machine.

[0104] like Figure 5 and Figure 8As shown, in some embodiments, the conveying mechanism 41 further includes a first gear 46, a second gear 47, and a third gear 48. The first gear 46 is disposed between the second gear 47 and the third gear 48, and meshes with the second gear 47 and the third gear 48, respectively. The first gear 46 is coaxially disposed with an idler gear on the first sub-conveyor 411a, thereby driving the first sub-conveyor 411a to rotate synchronously. The first gear 46 rotates in the same direction as the first sub-conveyor 411a, causing the first sub-conveyor 411a to gradually move the film material 100 closer to the second sub-conveyor 411b. The second gear 47 is coaxially disposed with an idler gear on the second sub-conveyor 411b, thereby driving the second sub-conveyor 411b to rotate synchronously. The third gear 48 is in transmission connection with the first motor 42. In the above, transmission through the gear assembly improves transmission accuracy.

[0105] The fixing portion for fixing the film material 100 is provided on the side of the conveyor belt facing the limiting guide rail 412 , so that the film material 100 can be limited on the fixing portion under the action of the limiting guide rail 412 .

[0106] Figure 10 for Figure 9 Magnified view of area C in .

[0107] like Figure 5 、 Figure 9 and Figure 10 As shown, in some embodiments, the fixing portion is configured as a boss 4111. The film material 100 can be inserted into the boss 4111 to be fixed to the conveyor belt 411. A plurality of bosses 4111 are provided, and the plurality of bosses 4111 are spaced apart along the length direction of the conveyor belt 411. A piece of film material 100 can be fixed on the plurality of bosses 4111, thereby improving the fit between the film material 100 and the conveyor belt 411. The bosses 4111 are provided along the length direction of the conveyor belt 411, so that the film material 100 does not need to be fixed to a specific position of the film material 100. In this embodiment, the bosses 4111 are evenly spaced apart along the length direction of the conveyor belt 411.

[0108] Multiple fixing holes can be set on both sides of the film material 100, and the distance between two adjacent fixing holes is equal to the distance between two adjacent bosses 4111, so that each side of the film material 100 can be fixed on multiple bosses 4111 at the same time.

[0109] Furthermore, in order to facilitate the sleeve connection of the film material 100 on the boss 4111, the diameter of the boss 4111 can be set to gradually decrease from the fixed position outward. For example, the boss 4111 can be set to be conical.

[0110] The fixing holes on the film 100 can be configured as waist-shaped holes, further facilitating the fixing of the film 100 to the boss 4111. A limiting guide rail 412 is disposed outside the conveyor belt 411 and extends along the direction of extension of the conveyor belt 411, thereby preventing the film 100 from separating from the conveyor belt 411. A first gap is formed between the limiting guide rail 412 and the conveyor belt 411. The width of the first gap is adapted to the thickness of the film 100, allowing the film 100 to move along the first gap while ensuring that the film 100 does not separate from the conveyor belt 411.

[0111] In some embodiments, the limiting guide rail 412 is only provided on the conveyor belt 411 at a position opposite to the conveying track of the film material 100 , thereby reducing material waste.

[0112] like Figure 5 As shown, the limiting guide rail 412 may include a first sub-limiting guide rail 412a and a second sub-limiting guide rail 412b. The first sub-limiting guide rail 412a is disposed outside the first sub-conveyor belt 411a to limit the film material 100 from escaping from the first sub-conveyor belt 411. The second sub-limiting guide rail 412b is disposed outside the second sub-conveyor belt 411b to limit the film material 100 from escaping from the second sub-conveyor belt 411b.

[0113] like Figure 10 As shown, a second guide portion 412b1 is provided at one end of the second sub-limiting guide rail 412b close to the first sub-conveyor belt 411a, and the second guide portion 412b1 is formed with a guide surface inclined toward the first sub-conveyor belt 411a, which is used to transfer the film material 100 from the first sub-conveyor belt 411a to the second sub-conveyor belt 411b.

[0114] A first guide portion 412a1 is provided at one end of the first sub-limiting guide rail 412a close to the second sub-conveyor belt 411b. The first guide portion 412a1 is formed with a guide surface inclined toward the second sub-conveyor belt 411b. The first guide portion 412a1 and the second guide portion 412b1 are staggered, which can further improve the stability of the film material 100 being transferred from the first sub-conveyor belt 411a to the second sub-conveyor belt 411b.

[0115] A second gap is formed between the first guide portion 412a1 and the second guide portion 412b1, a first transition zone is formed at a position on the first sub-conveyor 411a opposite to the second gap, and a second transition zone is formed at a position on the second sub-conveyor 411b opposite to the second gap. The first transition zone and the second transition zone are arranged close to each other, and the boss 4111 on the first transition zone is arranged opposite to the boss 4111 on the second transition zone, so that the film material 100 separated from the first sub-conveyor 411a can be smoothly fixed on the second sub-conveyor 411b.

[0116] like Figure 5 and Figure 9 As shown, a third guide portion 412a2 is formed at one end of the first sub-limiting guide rail 412a near the buffer assembly 2. The third guide portion 412a2 is bent upward to form a third guide opening. The opening size of the third guide opening gradually decreases as it moves away from the buffer assembly 2. The third guide opening is used to guide the film material 100 entering the conveyor assembly 4 so that the film material 100 entering the third guide opening can gradually approach the conveyor belt, thereby connecting to the conveyor assembly 4 and moving with the conveyor assembly 4.

[0117] In some embodiments, a first sensor 43 may be disposed on the third guide portion 412a1 to detect whether a film material 100 enters the conveyor assembly 4 from the buffer assembly 2. The first sensor 43 can detect the position of the fixing holes on the passing film material 100. When the first sensor 43 detects that a film material 100 has been connected from the buffer assembly 2 to the conveyor assembly 4, the second motor 22 controls the swing member 21 to swing downward to the second position, causing the film material 100 to be buffered at the position of the buffer assembly 2, forming a downwardly curved arc, thereby preventing the film material 100 from accumulating, thereby enabling the powder sprinkling assembly 3 to evenly sprinkle powder on the film material 100.

[0118] like Figure 5 and Figure 8 As shown, in other embodiments, the conveying mechanism 41 includes a code disk 44 and a sixth sensor 45. The sixth sensor 45 is disposed above the code disk 44 and fixed to the outer side of the lower portion of the baking assembly 5. The code disk 44 is provided with circumferential gear teeth, and the distance between two adjacent gear teeth is equal to the distance between two adjacent bosses 4111. The rotation trajectory of the code disk 44 is within the detection range of the sixth sensor 45. The code disk 44 is used to detect the rotation distance of the code disk 44, thereby obtaining the position of the bosses 4111 on the conveyor belt 411.

[0119] The code disk 44 is connected to the conveyor belt 411 via a gear train. Specifically, the code disk 44 is coaxially arranged with the first gear 46. The first, second, and third gears 47, 48 have the same rotation radius. A sixth sensor 45 is located on one side of the code disk 44 to detect the rotation distance of the code disk 44. When the teeth of the code disk 44 pass the sixth sensor 45, the sixth sensor 45 generates an excitation signal. Because there is a speed difference between the conveying speed of the conveyor assembly 4 and the speed at which the film 100 exits the printer 02, when the film 100 enters the third guide portion 412a2 and advances to a certain position, the fixing holes on the film 100 engage with the bosses 4111 on the conveyor belt 411. By detecting the position of the teeth on the code disk 44 by the sixth sensor 45, the rotation distance of the first sub-conveyor belt 411 can be determined, thereby determining whether the film 100 entering the first sub-conveyor belt 411 from the buffer assembly 2 is accurately fixed to the transmission mechanism 41.

[0120] Figure 11 for Figure 3 Magnified view of area B in FIG.

[0121] The powder spreading assembly 3 includes a powder spreading mechanism 31, a powder storage mechanism 32, and a powder circulation mechanism 33. The powder spreading mechanism 31 is positioned above the buffer assembly 2 and is used to spread hot-melt adhesive powder onto the film 100 buffered thereon. When the swing member 21 swings downward to its second position, the film 100 is buffered relative to the swing member 21, forming a downwardly curved arc. At this point, the powder spreading mechanism 31 spreads the hot-melt adhesive powder onto the film 100, ensuring a more even distribution of the hot-melt adhesive across the surface of the film 100 and better coverage of the pattern.

[0122] The powder storage mechanism 32 is used to store hot melt adhesive powder. The powder storage mechanism 32 is disposed below the powder spreading mechanism 31 and has a powder recovery port 3215 facing the powder spreading mechanism 31 .

[0123] The powder circulation mechanism 33 is at least partially arranged in the powder storage mechanism 32 and is opposite to at least part of the powder sprinkling mechanism 31. It is used to circulate between the powder sprinkling mechanism 31 and the powder storage structure 32, and carry out part of the hot melt adhesive powder in the powder storage mechanism 32, and transfer at least part of the hot melt adhesive powder to the powder sprinkling mechanism 31.

[0124] Figure 12 This is a schematic diagram of the structure of the powder spreading mechanism provided in this application. Figure 13 This is a schematic diagram of the structure of the powder spreading roller provided in this application.

[0125] like Figure 3 、 Figure 11 、 Figure 12 and Figure 13 As shown, further, the powder sprinkling mechanism 31 includes a powder sprinkling bin 311, a powder sprinkling roller 313 and a third motor 314. The powder sprinkling bin 311 is arranged above the buffer assembly 2, and both ends of the powder sprinkling bin 311 are fixed to the bracket 24. A powder sprinkling port is provided at the bottom of the powder sprinkling bin 311 to facilitate the discharge of hot melt adhesive powder from the powder sprinkling port and to be sprinkled onto the film material 100. The powder sprinkling port extends along the length of the powder sprinkling bin 311. It is understood that the length of the powder sprinkling port is not less than the width of the film material 100 to ensure that the hot melt adhesive powder can cover all positions along the width of the film material 100. The powder sprinkling roller 313 is arranged in the powder sprinkling port and extends along the length direction of the powder sprinkling port. One end of the powder sprinkling roller 313 is rotatably connected to one of the mounting plates 241. The output shaft of the third motor 314 passes through the other mounting plate 241 and is transmission-connected to the other end of the powder sprinkling roller 313, and is used to drive the powder sprinkling roller 313 to rotate so as to bring the hot melt adhesive powder in the powder sprinkling bin 311 out of the powder sprinkling port and sprinkle it downward onto the film material 100.

[0126] The powder hopper 311 is used to store the hot melt adhesive powder transferred from the powder storage mechanism 32 by the powder circulation mechanism 33. The inner diameter of the powder hopper 311 gradually decreases from top to bottom, and its cross-section is roughly V-shaped, so that the hot melt adhesive powder in the powder hopper 311 can slide to the bottom of the powder hopper 311 more easily.

[0127] In order to improve the strength of the powder spreading bin 311, a plurality of reinforcing ribs 3111 are spaced apart in the powder spreading bin 311. The reinforcing ribs 3111 are respectively connected to the two side walls of the powder spreading bin 311 in the length direction.

[0128] In some embodiments, the powder spreading mechanism 31 is linked to the printer 02. When the film 100 reaches a specific position, the third motor 314 is controlled to rotate for a certain period of time to ensure that a sufficient amount of hot melt adhesive powder is spread. The third motor 314 then stops rotating, precisely controlling the placement of the hot melt adhesive powder on the film 100. The amount of powder spread can be adjusted through printing parameters. For example, if the number of passes is high or the pattern is large, the amount of powder spread can be increased.

[0129] The surface of the powder sprinkling roller 313 is provided with at least one powder groove 3131, which can be used to carry hot melt adhesive powder. The powder groove 3131 extends along the axial direction of the powder sprinkling roller 313. When the powder sprinkling roller 313 rotates, the powder groove 3131 can bring out the hot melt adhesive powder in the powder sprinkling bin 311 to sprinkle the hot melt adhesive powder through the powder sprinkling port, thereby improving the uniformity of the hot melt adhesive powder on the film material 100.

[0130] like Figure 13 As shown, in some embodiments, a plurality of powder grooves 3131 are provided on the circumference of the powder sprinkling roller 313, and the plurality of powder grooves 3131 are evenly spaced to improve the powder sprinkling efficiency.

[0131] like Figure 11 and Figure 12 As shown, in some embodiments, the powder spreading mechanism 31 further includes a powder scraper 315. The powder scraper 315 is disposed in the powder spreading bin 311 and near the powder spreading opening. The powder scraper 315 contacts the powder spreading roller 313 so that when the powder spreading roller 313 rotates, the powder scraper 315 extends into the powder groove 3131 and scrapes out the hot melt adhesive powder in the powder groove 3131 so that the hot melt adhesive powder falls into the powder spreading opening.

[0132] In some embodiments, two powder scrapers 315 are provided. The two powder scrapers 315 are respectively disposed at both ends of the powder sprinkling opening. The two powder scrapers 315 face opposite directions and are located on both sides of the powder sprinkling roller 313 in the radial direction and both abut against the powder sprinkling roller 313 .

[0133] The two powder scrapers 315 are located on either side of the powder spreading roller 313 in the axial direction, and the distance between the two powder scrapers 315 is no greater than the width of the powder spreading roller 313. When the powder spreading roller 313 rotates, the two powder scrapers 315 can sweep the hot melt adhesive powder on the powder groove 3131, allowing the hot melt adhesive powder to fall onto the film material 100.

[0134] The two powder scrapers 315 are tilted and face oppositely, and their tilt direction is opposite to the rotation direction of the powder roller 313. This allows the two powder scrapers 315 to be inserted into the powder trough 3131 when the powder roller 313 rotates, effectively removing the hot melt adhesive powder from the trough 3131 in a direction opposite to the rotation direction of the powder roller 313. For example, when the powder roller 313 rotates counterclockwise, one of the powder scrapers 315 is positioned in front of the powder roller 313 and tilted downward, while the other powder scraper 316 is positioned behind the powder roller 313 and tilted upward.

[0135] In one embodiment, the powder scraping member 315 may be a brush, which includes a soft portion in contact with the powder sprinkling roller 313 . The soft portion can be deformed as the powder sprinkling roller 313 rotates, thereby scraping off the hot melt adhesive powder in the powder groove 3131 .

[0136] Figure 14 This is a schematic diagram of the structure of the powder spreading component provided in this application.

[0137] like Figure 3 and Figure 14 As shown, the powder storage mechanism 32 is provided below the buffer assembly 2 for storing and recovering hot melt adhesive powder.

[0138] The powder storage mechanism 32 includes a powder storage bin 321, a powder adding bin 322, and a sleeve 3216. The powder storage bin 321 is located below the buffer assembly 2, and the powder adding bin 322 is located above the powder storage bin 321. The sleeve 3216 is rotatable relative to the powder storage bin 321 and abuts against the lower outer side of the powder adding bin 322, supporting the powder adding bin 322 and enabling relative rotation, thereby allowing the powder adding bin 322 to rotate more smoothly.

[0139] The powder storage bin 321 is used to store hot melt adhesive powder. It has an upward-facing powder recovery port 3215 . Excess hot melt adhesive powder on the film 100 or hot melt adhesive powder dropped from the powder spreading mechanism 31 can be recovered from the powder recovery port 3215 into the powder storage bin 321 , facilitating the recycling of the hot melt adhesive powder.

[0140] The upper part of the powder storage bin 321 is V-shaped, that is, the upper cross-section of the powder storage bin 321 gradually increases from bottom to top. In this way, it can not only ensure that the powder recovery port 3215 is large enough to receive the hot melt adhesive powder falling from the powder spreading mechanism 31, but also enable the recovered hot melt adhesive powder to slide quickly along the inclined side wall of the powder storage bin 321 to the bottom of the powder storage bin 321.

[0141] In some embodiments, the powder storage bin 321 includes a powder recovery section 321a and a powder storage section 321b. The powder recovery section 321a is positioned above the powder storage section 321b, with the upper end of the powder recovery section 321a forming the powder recovery port 3215. The cross-sections of both the powder recovery section 321a and the powder storage section 321b gradually decrease from top to bottom. This allows for easier transfer of hot melt adhesive powder even when the volume is low.

[0142] Furthermore, a grille 325 is provided within the powder storage bin 321 near the powder recovery port 3215. The grille 325 is positioned within the powder recovery portion 321a, and its edges are connected to the inner wall of the powder recovery portion 321a. The grille 325 prevents the airflow generated by the swinging of the swinging member 21 from carrying away the hot melt adhesive powder from the powder storage bin 321 when a large amount of hot melt adhesive powder is present.

[0143] The powder adding bin 322 is used to store hot melt adhesive powder. The powder adding bin 322 has a powder unloading port, through which the hot melt adhesive powder in the powder adding bin 322 can be poured into the powder storage bin 321 .

[0144] Figure 15 This is a schematic diagram of the structure of the baking equipment provided in this application from a second perspective.

[0145] like Figure 3 and Figure 15 As shown, a first through hole 3214 is formed on one side wall of the powder storage bin 321 , and the powder adding bin 322 is passed through the first through hole 3214 .

[0146] Figure 16 Schematic diagram of the internal structure of the powder spreading component provided in this application. Figure 17 This is a structural schematic diagram of the powder spreading component provided in this application from a second perspective. Figure 18 for Figure 17 Cross-sectional view along the EE direction.

[0147] like Figures 16 to 18 As shown, a third limiting protrusion 3222 is formed on the side wall of the powder adding bin 322, and the protruding direction of the third limiting protrusion 3222 is consistent with the direction of the powder discharge port of the powder adding bin 322. A first notch 32141 is formed on the upper portion of the first through hole 3214, and the third limiting protrusion 3222 corresponds to and fits with the first notch 32141.

[0148] A first limiting protrusion 3212 and a second limiting protrusion 3213 are formed on the inner wall of the powder storage bin 321 near the first through-hole 3214. The first limiting protrusion 3212 is located above the first through-hole 3214, and the second limiting protrusion 3213 is located below the first through-hole 3214. The powder adding bin 322 has a first position and a second position relative to the powder storage bin 321. When the powder adding bin 322 is in the first position, the first notch 32141 corresponds to the third limiting protrusion 3222, and the third limiting protrusion 3222 abuts the first limiting protrusion 3212. When the powder adding bin 322 is in the second position, the third limiting protrusion 3222 abuts the second limiting protrusion 3213. At this time, the powder discharge port of the powder adding bin 322 faces downward and is connected to the powder storage bin 321, allowing the hot melt adhesive powder in the powder adding bin 322 to be transferred to the powder storage bin 321.

[0149] In some embodiments, the first limiting protrusion 3212 and the second limiting protrusion 3213 are arranged at the radial ends of the first through hole 3214, and the second limiting protrusion 3213 and the third limiting protrusion 3222 are limited at the bottom of the first through hole 3214. In this way, when the powder adding bin 322 pours the hot melt adhesive powder into the powder storage bin 321, the powder unloading port is downward, ensuring that the hot melt adhesive powder in the powder adding bin 322 can fall completely into the powder storage bin 321.

[0150] When adding hot melt adhesive powder, the powder adding bin 322 is rotated to the position where the third limiting protrusion 3222 abuts the first limiting protrusion 3212, the powder adding bin 322 is pulled out, and hot melt adhesive powder is added to the powder adding bin 322. The powder adding bin 322 is then inserted into the powder storage bin 321, and the powder adding bin 322 is rotated to pour the hot melt adhesive powder in the powder adding bin 322 into the powder storage bin 321. This operation is repeated until the powder adding operation is completed.

[0151] A fourth sensor 323 is provided within the powder storage bin 321 and is connected to the upper inner wall of the powder storage bin 321. The fourth sensor 323 can detect the level of hot melt adhesive powder in the powder storage bin 321. When the level of hot melt adhesive powder in the powder storage bin 321 falls below a certain level, the fourth sensor 323 will sound an alarm, prompting the user to add more powder.

[0152] Furthermore, a plurality of fourth sensors 323 may be provided at different heights in the powder storage bin 321 to generate different powder adding signals.

[0153] like Figure 15 As shown, further, a powder adding port 12 is formed on the housing 1, and the powder adding port 12 and the powder adding bin 322 are arranged opposite to each other for taking out the powder adding bin 322. The powder adding port 12 is covered with a powder adding cover 6 to close the powder adding port 12 to prevent accidental contact with the powder adding bin 322.

[0154] The powder adding cover 6 can be movably connected to the housing 1. One side of the powder adding cover 6 can be rotatably connected to the housing 1 via a connecting piece. A rebound piece 324 is provided on the outer wall of the powder storage bin 321. The other side of the powder adding cover 6 can be connected to the powder storage bin 321 via the rebound piece 324 to facilitate the opening and closing of the powder adding cover 6, thereby facilitating the removal and placement of the powder adding bin 322.

[0155] In one embodiment, the powder adding bin 322 can add 2 kg of hot melt adhesive powder at a time, and the powder storage bin 321 can accommodate 4 kg of hot melt adhesive powder. The powder storage bin 321 has a larger capacity, which can reduce the frequency of adding powder and improve the user experience to a certain extent.

[0156] like Figure 3 and Figure 6 As shown, the powder circulation mechanism 33 includes a powder circulation timing belt 331, a transmission structure 335, and a fourth motor 332. The transmission structure 335 includes a driving pulley 3351 and a plurality of driven pulleys 3352. The fourth motor 332 is in driving connection with the driving pulley 3351 to drive the driving pulley 3351 to rotate, thereby driving the powder circulation timing belt 331 to circulate along the powder spreading mechanism 31 and the powder storage mechanism 32, thereby transferring the hot melt adhesive powder from the powder storage mechanism 32 to the powder spreading mechanism 31, thereby achieving the spreading, recovery, and reuse of the hot melt adhesive powder.

[0157] The powder circulation timing belt 331 is connected to the driving wheel 3351 and the driven wheel 3352, and forms a circulation loop between the powder sprinkling mechanism 31 and the powder storage mechanism 32. Part of the powder circulation timing belt 331 is arranged above the powder sprinkling mechanism 31, and part of the powder circulation timing belt 331 is arranged in the powder storage mechanism 32. The powder circulation timing belt 331 is used to carry out part of the hot melt adhesive powder in the powder storage mechanism 32 to transfer it to the powder sprinkling component 3.

[0158] The powder circulation synchronous belt 331 includes a main body 3312 and multiple protrusions 3311 arranged on the outside of the main body 3312. The inner side of the main body 3312 is transmission-connected to the transmission structure 335. The multiple protrusions 3311 are arranged at intervals, and a powder space is formed between two adjacent protrusions 3311. The powder space is used to carry hot melt adhesive powder.

[0159] The part of the powder circulation synchronous belt 331 located in the powder storage mechanism 32 extends to the bottom of the powder storage bin 321. The bottom of the powder storage bin 321 is formed with a groove through which the powder circulation synchronous belt 331 passes. During the circulating movement of the powder circulation synchronous belt 331, the powder space will carry the hot melt adhesive powder in the powder storage bin 321 along the groove inside the powder storage bin 321 and rise to the powder sprinkling bin 311.

[0160] like Figure 6 and Figure 16As shown, a powder guide groove 3211 is provided on one side of the powder storage bin 321, and the powder guide groove 3211 extends along the height direction of the powder storage bin 321. A powder circulation synchronous belt 331 is provided in the powder guide groove 3211, and the powder circulation synchronous belt 331 can move upward to drive the hot melt adhesive powder from the powder storage bin 321 to rise to the powder sprinkling bin 311.

[0161] like Figure 6 As shown, the powder circulation synchronous belt 331 further includes a powder discharge member 334. The powder discharge member 334 is disposed above the powder sprinkling bin 311 of the powder sprinkling mechanism 31 and outside the powder circulation synchronous belt 311. At least one, such as one, two, three, four, or more, powder discharge members 334 are disposed along the length of the powder sprinkling bin 311. The powder discharge member 334 is used to discharge hot melt adhesive powder carried by the powder circulation synchronous belt 331 during the movement of the powder circulation synchronous belt 331, so that the hot melt adhesive powder falls into the powder sprinkling bin 311. During the movement of the powder circulation mechanism 33, the powder discharge member 33 may contact the powder circulation mechanism 33 to scrape the powder off the powder circulation mechanism 33.

[0162] Since the powder circulation mechanism 33 continuously circulates, the powder discharge member 334 is positioned within the path, covering most of the position of the powder circulation mechanism 33 within the powder hopper 311. This allows the hot melt adhesive powder to be transferred more evenly into the powder hopper 311, thereby improving the uniformity of the hot melt adhesive powder's adhesion to the film material 100. Preferably, multiple powder discharge members 334 are spaced apart along the length of the powder hopper 311. This not only ensures a more even transfer of the hot melt adhesive powder into the powder hopper 311, but also reduces friction between the powder discharge member 334 and the powder circulation mechanism 33.

[0163] In some embodiments, the powder discharge member 334 may not be provided, and the portion of the powder circulation mechanism 33 in the powder hopper 311 may be shaken to cause the hot melt adhesive powder on the powder circulation mechanism 33 to fall into the powder hopper 311. Specifically, a motor may be provided to shake the powder circulation mechanism 33, or a high and low structure may be provided in the powder hopper 311 to cause the powder circulation mechanism 33 to shake when it moves to the structure.

[0164] To ensure the normal operation of the powder circulation synchronous belt 331, the powder circulation mechanism 33 also includes a tensioning mechanism 333. The tensioning mechanism 333 is disposed in the powder storage mechanism 32 and is rotatably connected to the powder circulation synchronous belt 331 to adjust the tension of the powder circulation synchronous belt 331.

[0165] In some embodiments, the tensioning mechanism 333 includes a tensioning member 3331 and a tensioning screw 3332. The tensioning member 3331 is disposed in the powder storage bin 321, the powder circulation synchronous belt 331 passes through the tensioning member 3331, and one of the driven wheels 3352 of the powder circulation synchronous belt 331 is rotatably connected to the tensioning member 3331. One end of the tensioning screw 3332 passes through a side wall of the powder storage bin 321 and is connected to the tensioning member 3331. By adjusting the length of the tensioning screw 3332 screwed into the powder storage bin 321, the tension of the powder circulation synchronous belt 331 can be adjusted to ensure normal operation of the powder circulation synchronous belt 331.

[0166] like Figure 14 and Figure 16 As shown, the powder spreading assembly 3 further includes a powder patting mechanism 34. The powder patting mechanism 3 is fixed to the mounting plate 24. The powder patting mechanism 34 is disposed between the powder spreading mechanism 31 and the powder storage mechanism 32. On the conveying path of the film material 100, the powder patting mechanism 34 is located downstream of the powder spreading mechanism 31. The powder patting mechanism 34 can intermittently pat the film material 100 after the hot melt adhesive is sprinkled, thereby shaking off the hot melt adhesive powder that is not adhered to the film material 100. By using the powder patting mechanism 34 to pat the film material 100 after the powder is sprinkled, the uniformity of the hot melt adhesive powder on the film material 100 can be improved.

[0167] Specifically, the powder-slapping mechanism 34 includes a fifth motor 341, a rotating shaft 342, and at least one flapping member 343 disposed on the rotating shaft 342. One end of the rotating shaft 342 is rotatably mounted on the bracket 24, the fifth motor 341 is fixedly mounted on the bracket 24, and the fifth motor 341 is transmission-connected to the other end of the rotating shaft 342 for driving the rotating shaft 342 to rotate. The flapping member 343 is disposed on the rotating shaft 342 and extends radially along the rotating shaft 342. When the rotating shaft 342 rotates, the flapping member 343 can rotate to the back side of the film material 100 located in the buffer assembly 2 and contact the back side of the film material 100 to flap the film material 100, shake off excess hot melt adhesive powder on the film material 100, and improve the utilization rate of the hot melt adhesive powder.

[0168] The fifth motor 341 can be linked with the printer 02 to estimate the conveying position of the film material 100 through the second sensor 23 and the third sensor 26, and shake the powder when the film material 100 arrives. After the film material 100 completely enters the baking equipment 01, the powder-beating mechanism 34 stops operating.

[0169] When the powder beating mechanism 34 is in operation, the fifth motor 341 rotates forward and backward in a cycle, so that the beating member 343 can produce an intermittent beating action on the film material 100 .

[0170] In some embodiments, a plurality of beating members 343 are provided, and the plurality of beating members 343 are spaced apart along the axial direction of the rotating shaft 342 to cover a wider range of the film material 100 and more effectively shake off excess hot melt adhesive powder on the film material 100 .

[0171] An avoidance groove 214 is provided at one end of the swinging member 21 facing the conveying direction of the film material 100. The avoidance groove 214 is provided corresponding to the flapping member 343. The notch of the avoidance groove 214 faces the conveying direction of the film material 100, and there are multiple avoidance grooves 214 arranged at intervals along the length direction of the swinging member 21. When the rotating shaft 342 rotates, the flapping member 343 can be inserted into the avoidance groove 214 to flap the back of the film material 100.

[0172] like Figure 14 As shown, the flapping member 343 includes a clamping body 3431 and a flexible member 3432 fixed to the end of the clamping body 3431. The clamping body 3431 is fixed to the rotating shaft 342. The flexible member 3432 can be disposed at one end of the clamping body 3431 or at both ends of the clamping body 3431. For example, the flexible member 3432 can be made of silicone, which has a certain strength. It not only produces an effective flapping effect on the film material 100, but also does not scratch the film material 100.

[0173] Figure 19 This is a schematic diagram of the structure of the baking component provided in this application. Figure 20 for Figure 19 Cross-sectional view along DD direction.

[0174] like Figure 3 、 Figure 19 and Figure 20 As shown, the baking assembly 5 includes an insulating box 51, a heating element 52, and an exhaust structure 53. An air supply port 511 is formed at the bottom of the insulating box 51. A first fan 54 is provided at the bottom of the insulating box 51 to supply air into the insulating box 51. The exhaust structure 53 is in communication with the insulating box 51 and can be connected to an external exhaust gas purification device to discharge the exhaust gas generated in the insulating box 51 to the external exhaust gas purification device.

[0175] like Figure 3 and Figure 8 As shown, further, the exhaust structure 53 includes an exhaust fan 531, a first exhaust pipe 532 and a second exhaust pipe 533. The exhaust fan 531 is arranged at the upper part of the heat-insulating box body 51 and is connected to the inside of the heat-insulating box body 51. The first exhaust pipe 532 is connected to the air outlet of the exhaust fan 531, and the second exhaust pipe 533 is connected to the first exhaust pipe 532. The other end of the second exhaust pipe 533 is connected to an external exhaust gas purification device. The inner diameter of the first exhaust pipe 532 is smaller than the inner diameter of the second exhaust pipe 533, so that a Bernoulli fluid is formed in the exhaust structure 53, thereby increasing the discharge rate of the exhaust gas in the heat-insulating box body 51.

[0176] Furthermore, the first exhaust pipe 532 and the second exhaust pipe 533 are axially connected and arranged in the baking insulation box 51, which improves the compactness of the baking equipment 01 to a certain extent and reduces the volume of the baking equipment 01.

[0177] The baking assembly 5 further includes a heating element 52 , at least one of which is disposed in the heat-insulating box 51 and is used to dry the film material 100 that has passed through the baking assembly 5 .

[0178] There may be multiple heating elements 52, and the multiple heating elements 52 are distributed at intervals along the height direction of the heat-insulating box body 51. The heating elements 52 are distributed along the height direction, which reduces the volume of the whole machine to a certain extent.

[0179] The plurality of heating elements 52 may be evenly spaced or unevenly spaced, and each heating element 52 may be set to the same power or a different power, which may be determined based on the pattern or material to be dried.

[0180] The baking assembly 5 also includes a first fan 54, which supplies air to the insulation box 51, thereby accelerating the convection speed in the insulation box 51, so that the exhaust gas generated in the insulation box 51 is discharged more quickly through the exhaust structure 53 to the exhaust purification device.

[0181] When the film material 100 passes through the baking assembly 5, the film material 100 moves between the insulation box 51 and the heating element 52, and the film material 100 is transmitted along at least a trajectory parallel to the three heating surfaces of the insulation box 51 in sequence, so that the film material 100 has a longer travel through the baking assembly 5, thereby improving the drying effect.

[0182] like Figure 8 and Figure 20 As shown, to prevent the film 100 from being damaged by the heating element 52, the baking assembly 5 further includes an isolation box 55. The walls of the isolation box 55 are mesh-shaped, and the heating element 52 is disposed within the isolation box 55, thereby isolating the heating element 52 from the film 100. The mesh-shaped isolation box 55 does not affect the heating effect of the heating element 52, and can ensure the drying effect of the film 100.

[0183] like Figure 20 As shown, to further reduce heat loss within the baking assembly 5 and prevent the heat generated by the baking assembly 5 from affecting other components of the baking device 01, the side walls of the insulating box 51 are provided with an aluminum foil layer 512 and a heat-insulating material layer 513. Furthermore, the inner wall of the insulating box 51 is formed with a mirror layer 514, which radiates heat to the hot air through the mirror layer 514, thereby reducing heat loss.

[0184] In this embodiment, three heating elements 52 are installed in the heat-insulating box 51, which can meet the drying requirements of most DTF prints. Two first fans 54 are provided, and the two first fans 54 are arranged side by side along the bottom of the heat-insulating box 51 to meet the air circulation requirements within the heat-insulating box 51.

[0185] Furthermore, in order to prevent the second sub-conveyor belt 411b from overheating and affecting its service life, multiple cooling fans are also connected to the outside of the insulation box 51. The air outlet direction of the cooling fan can be toward the second sub-conveyor belt 411b to accelerate the air flow speed on the surface of the second sub-conveyor belt 411b, thereby improving the cooling effect of the second sub-conveyor belt 411b.

[0186] In summary, the present application realizes the connection between the film material and the conveying component by setting a buffer component at a position opposite to the feed port, realizes the transmission and tension isolation of the film material between the printer and the baking equipment, eliminates the problem of the film material affecting the transmission effect due to the change of surface tension during the feeding process, and avoids the mutual influence between the two. By setting a boss on the conveying component and engaging and fixing it with the fixing holes on the two side edges of the film material, the single sheet transmission of the film material is realized, the utilization rate of the film material is improved, and thus the flexibility of customized printing is improved. The transmission of the film material between the buffer component and the conveying component is controlled by the first sensor, the second sensor and the third sensor to realize the automatic feeding of the film material. The conveying component realizes the segmented transmission of the film material through the first sub-conveyor belt and the second sub-conveyor belt, and the baking component is distributed along the height direction of the shell, which optimizes the layout of the components in the baking equipment and improves the compactness of the whole machine to a certain extent.

[0187] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and application concept of this application, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A powder spreading component, characterized in that: include: Powder spreading mechanism, used to spread hot melt adhesive powder onto the membrane material; A powder storage mechanism for storing hot melt adhesive powder; the powder storage mechanism is arranged below the powder spreading mechanism, and the powder storage mechanism is formed with a powder recovery port facing the powder spreading mechanism; A powder circulation mechanism is at least partially arranged in the powder storage mechanism and is opposite to at least part of the powder spreading mechanism. It is used for circulating between the powder spreading mechanism and the powder storage mechanism, carrying out part of the hot melt adhesive powder in the powder storage mechanism, and transferring at least part of the hot melt adhesive powder to the powder spreading mechanism.

2. The powder spreading assembly according to claim 1, characterized in that: The powder spreading mechanism comprises: A powder spreading bin is used to store the hot melt adhesive powder spread by the powder circulation mechanism, and a powder spreading port is provided at the bottom of the powder spreading bin; a powder sprinkling roller, disposed at the powder sprinkling opening and extending along the length direction of the powder sprinkling opening; The third motor is in driving connection with the powder sprinkling roller and is used for driving the powder sprinkling roller to rotate so as to sprinkle the hot melt adhesive powder in the powder sprinkling bin through the powder sprinkling port.

3. The powder spreading assembly according to claim 2, characterized in that: The surface of the powder sprinkling roller is provided with a powder groove, which extends along the axial direction of the powder sprinkling roller. When the powder sprinkling roller rotates, the powder groove can bring out the hot melt adhesive powder in the powder sprinkling bin to sprinkle the hot melt adhesive powder through the powder sprinkling port.

4. The powder spreading assembly according to claim 3, characterized in that: The powder spreading mechanism also includes: A powder scraper is arranged in the powder sprinkling bin and close to the powder sprinkling port. The powder scraper contacts the powder sprinkling roller so as to extend into the powder trough and scrape out the hot melt adhesive powder in the powder trough when the powder sprinkling roller rotates, so that the hot melt adhesive powder falls into the powder sprinkling port.

5. The powder spreading assembly according to claim 3, characterized in that: There are two powder scraping members, which are respectively arranged obliquely at the two ends of the powder sprinkling opening and facing opposite directions, and respectively abut against the two sides of the powder sprinkling roller in the radial direction; and / or, The powder scraping member is a brush, which includes a soft portion in contact with the powder sprinkling roller. The soft portion can be deformed as the powder sprinkling roller rotates to scrape off the hot melt adhesive powder in the powder tank.

6. The powder spreading assembly according to claim 1, characterized in that: The powder storage mechanism comprises: A powder storage bin is used to store hot melt adhesive powder, and the powder storage bin is provided with the powder recovery port; The powder adding bin is rotatably and pullably installed in the powder storage bin and is used to store hot melt adhesive powder. The powder adding bin has a powder unloading port, so that the hot melt adhesive powder in the powder adding bin can be poured into the powder storage bin through the powder unloading port.

7. The powder spreading assembly according to claim 6, characterized in that: The powder storage mechanism further includes a fourth sensor, which is disposed in the powder storage bin and is used to detect the capacity of the hot melt adhesive powder in the powder storage bin; and / or, The powder storage mechanism further includes a sleeve disposed in the powder storage bin, wherein the sleeve is rotatable relative to the powder storage bin, and the sleeve abuts against the lower outer side surface of the powder adding bin to support the powder adding bin.

8. The powder spreading assembly according to claim 6, characterized in that: The powder storage bin includes a powder recovery part and a powder storage part. The powder recovery part is arranged above the powder storage part. The upper end of the powder recovery part forms the powder recovery port. The bin width of at least part of the powder recovery part and the bin width of at least part of the powder storage part gradually decrease from top to bottom.

9. The powder spreading assembly according to claim 8, characterized in that: The powder recovery part is provided with grids, and the grids are respectively connected to the inner walls of the powder recovery part.

10. The powder spreading assembly according to claim 6, characterized in that: The powder storage bin is provided with a first through hole, and the powder adding bin is provided through the first through hole and inserted into the powder storage bin; A third limiting protrusion is formed on the side wall of the powder adding bin, and the protruding direction of the third limiting protrusion is consistent with the opening direction of the powder adding bin; a first notch is formed on the upper part of the first through hole, and the third limiting protrusion is correspondingly adapted to the first notch.

11. The powder spreading assembly according to claim 10, characterized in that: The inner wall of the powder storage bin is formed with a first limiting protrusion and a second limiting protrusion, the first limiting protrusion is arranged above the first through hole, and the second limiting protrusion is arranged below the first through hole, and the powder adding bin has a first position and a second position relative to the powder storage bin; When the powder adding bin is in the first position, the first notch is correspondingly arranged with the third limiting protrusion, and the third limiting protrusion abuts against the first limiting protrusion; When the powder adding bin is in the second position, the third limiting protrusion abuts against the second limiting protrusion, and the powder unloading port is communicated with the powder storage bin to pour the hot melt adhesive powder in the powder adding bin into the powder storage bin.

12. The powder spreading assembly according to claim 1, characterized in that: The powder circulation mechanism comprises: A transmission structure comprising a driving wheel and a plurality of driven wheels; a fourth motor, connected to the driving wheel for driving the driving wheel to rotate; A powder circulation synchronous belt is connected to the driving wheel and multiple driven wheels, and forms a circulation loop between the powder sprinkling mechanism and the powder storage mechanism. Part of the powder circulation synchronous belt is arranged above the powder sprinkling mechanism, and part of the powder circulation synchronous belt is arranged in the powder storage mechanism. The powder circulation synchronous belt is used to carry out part of the hot melt adhesive powder in the powder storage mechanism to transfer it to the powder sprinkling component.

13. The powder spreading assembly according to claim 1, characterized in that: The powder circulation synchronous belt includes a main body and a plurality of protrusions arranged on the outside of the main body. The inner side of the main body is transmission-connected to the transmission structure. The plurality of protrusions are arranged at intervals, and a powder space is formed between two adjacent protrusions. The powder space is used to carry hot melt adhesive powder.

14. The powder spreading assembly according to claim 12, characterized in that: The powder circulation mechanism also includes a powder unloading part, which is arranged above the powder sprinkling bin of the powder sprinkling mechanism and located on the outside of the powder circulation synchronous belt, and at least one is arranged along the length direction of the powder sprinkling bin. The powder unloading part is used to unload the hot melt adhesive powder carried on the powder circulation synchronous belt during the movement of the powder circulation synchronous belt, so that the hot melt adhesive powder falls into the powder sprinkling bin.

15. The powder spreading assembly according to any one of claims 1 to 14, characterized in that The powder spreading assembly further comprises: The powder-slapping mechanism is arranged between the powder-spreading mechanism and the powder storage mechanism. On the conveying path of the film material, the powder-slapping mechanism is located downstream of the powder-spreading mechanism. The powder-slapping mechanism is used to slap the film material after the hot-melt adhesive powder is sprinkled to shake off the hot-melt adhesive powder that is not adhered to the film material.

16. The powder spreading assembly according to claim 15, characterized in that The powder patting mechanism comprises: Rotating axis; At least one flapping member, disposed on the rotating shaft and extending radially along the rotating shaft; The fifth motor is connected to the rotating shaft and is used to drive the rotating shaft to rotate in the forward and reverse directions, so that the beating member can intermittently beat the film material after the hot melt adhesive powder is spread.

17. A baking device, characterized in that: The method comprises the powder spreading assembly according to any one of claims 1 to 16.

18. A printing system, characterized in that: include: A printer, used for printing patterns on the film material; as well as, The baking device as claimed in claim 17, wherein the baking device is arranged downstream of the printer and is used to bake the film material on which the pattern is printed by the printer.

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