A single-sided spreading device for baked goods

Abstract

The utility model discloses a single -sided scattering device of baking pastry, its characterized in that, including: the rack is equipped with the conveyer belt, pre -brush subassembly includes liquid storage container, pre -brush drive module and liquid coating brush, and liquid storage container and pre -brush drive module all are connected to the rack, and liquid coating brush is connected to pre -brush drive module, scattering subassembly includes storage container, scattering head, pushes scattering piece and pushes scattering drive module, and storage container, scattering head and pushes scattering drive module all are connected to the rack, and scattering head and liquid coating brush all are located the top of conveyer belt, scattering head is equipped with the feed hole, the discharge hole and the transfer chamber, and the feed hole is connected to the bottom of storage container, and the transfer chamber is spherical, and pushes scattering piece is hemispherical, and pushes scattering piece is located the transfer chamber, and the spherical surface of pushes scattering piece and the inner wall of transfer chamber are in contact, and pushes scattering piece is equipped with the pushing shaft, and the pushing shaft is connected to pushes scattering drive module. The utility model discloses scattering effect's consistency is high, and scattering is even, and material utilization is high, and scattering adhesion effect is firm and reliable.

Description

Technical Field

[0001] This utility model relates to the field of food processing, and in particular to a single-sided coating device for baking pastries. Background Technology

[0002] Baked goods refer to foods that need to be baked in an oven. In the baking process, in order to improve the appearance and taste of the products, it is often necessary to sprinkle granular materials such as sesame seeds, streusel, and icing sugar on the surface of the dough. For example, baked goods such as egg yolk pastry and wife cake need to be sprinkled with sesame seeds.

[0003] In existing technologies, to improve efficiency, a spreading device is designed to spread material onto the surface material. This spreading device uses a vibrating screen or perforated roller above the conveyor belt to continuously spread granular material from the hopper onto the surface material passing below through vibration or rotation. However, the spreading amount of this spreading device is difficult to control precisely, which can easily lead to too much or too little spreading, poor spreading effect, and easy material waste. In addition, the spread granular material has poor adhesion and is easy to fall off during subsequent conveying and baking processes, affecting the quality of the final product. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a single-sided coating device for baking pastries, which provides accurate and controllable coating amount, high coating consistency, high material utilization, and stable coating adhesion.

[0005] A single-sided coating device for baking pastries according to an embodiment of the present invention includes: The frame is equipped with a conveyor belt; The pre-brush assembly includes a liquid storage container, a pre-brush drive module, and a coating brush. The liquid storage container and the pre-brush drive module are both connected to the frame, and the coating brush is connected to the pre-brush drive module. The pre-brush drive module is used to drive the coating brush back and forth between the liquid storage container and the conveyor belt. The spreading assembly includes a storage container, a spreading head, a spreading block, and a spreading drive module. The storage container, spreading head, and spreading drive module are all connected to the frame. The spreading head and the coating brush are both located above the conveyor belt. The spreading head has an inlet hole, an outlet hole, and a transfer chamber. The inlet hole and outlet hole are respectively connected to the upper and lower ends of the transfer chamber. The top of the inlet hole is connected to the bottom of the storage container. The transfer chamber is spherical, and the spreading block is hemispherical. The spreading block is located in the transfer chamber, and the spherical surface of the spreading block abuts against the inner wall of the transfer chamber. The spreading block has a spreading shaft parallel to the horizontal plane. The spreading shaft is connected to the spreading drive module and is located on the plane of the spreading block.

[0006] In this embodiment, a capacity adjustment block is provided on the plane of the dispensing block.

[0007] In this embodiment, the surface of the capacity adjustment block is a smooth arc surface.

[0008] In this embodiment, multiple spreading heads and spreading blocks are provided. The spreading drive module includes a spreading motor and a spreading gear set. Each spreading shaft is connected to the spreading motor through the spreading gear set.

[0009] In this embodiment, there are multiple coating brushes, and the number of coating brushes is equal to the number of dispensing heads.

[0010] In this embodiment, the pre-brush driving module includes a rotary driving module and a two-dimensional driving module. The rotary driving module is connected to the two-dimensional driving module. Each coating brush has a coating shaft at its top. Each coating shaft is perpendicular to the horizontal plane and is connected to the rotary driving module. The rotary driving module is used to drive the coating brush to rotate.

[0011] In this embodiment, the rotary drive module includes a pre-brush holder, a pre-brush motor, and a pre-brush gear set. The pre-brush holder is connected to the two-dimensional drive module, the pre-brush motor is connected to the pre-brush holder, and each coating shaft is connected to the pre-brush motor through the pre-brush gear set.

[0012] In this embodiment, the two-dimensional drive module includes a horizontal linear positioning mechanism and a vertical linear positioning mechanism. The horizontal linear positioning mechanism is connected to the frame, the vertical linear positioning mechanism is connected to the horizontal linear positioning mechanism, and the pre-brush seat is connected to the vertical linear positioning mechanism.

[0013] The embodiments of this utility model have at least the following beneficial effects: By designing an internal feed hole, a transfer chamber, and a discharge hole connected sequentially from top to bottom within the feeding head, a temporary transfer space is created within the spherical transfer chamber when the hemispherical feeding block closes the discharge hole and opens the feed hole. This space is used to store a fixed amount of granular material. The feeding drive module rotates the feeding block, closing the feed hole and opening the discharge hole. The granular material temporarily stored in the transfer chamber is then fed to the discharge hole and falls. The amount of material fed is determined by the rotation speed and frequency of the feeding block. This intermittent, quantitative feeding method ensures consistent feeding on the surface of each batch of dough, resulting in high consistency and uniform feeding. This significantly improves the final product quality of baked pastries, and the feeding action effectively targets the surface of the dough. The process involves spreading ingredients on demand, resulting in highly targeted application, high material utilization, and effective cost savings. A pre-brushing component applies viscous liquids such as butter and egg wash to the dough before spreading, significantly improving the adhesion of granular materials like sesame seeds and crumble to the dough. This reduces the risk of loss due to vibration or temperature differences during subsequent transport, fermentation, or baking. The resulting coating adheres firmly and reliably, improving the quality of the final baked pastries. The pre-brushing and spreading components are integrated sequentially on the same conveyor belt along the transport direction, creating a compact structure that shortens the transfer distance between processes. This not only saves floor space but also increases the overall production line efficiency. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional structural diagram of the single-sided coating device for baking pastries according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the single-sided coating device for baking pastries according to an embodiment of the present invention, viewed from another perspective. Figure 3 This is a top view of the single-sided coating device for baking pastries according to an embodiment of the present invention; Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure of line A-A'; Figure 5 for Figure 4 A magnified structural diagram of B in the diagram; Figure 6 This is a partial structural diagram of the pre-brushing component in the single-sided coating device for baking pastries according to an embodiment of the present invention; Figure 7 This is a partial structural diagram of the spreading component in the single-sided spreading device for baking pastries according to an embodiment of the present invention; Figure 8This is a partial structural diagram of the spreading head and spreading block in the single-sided spreading device for baking pastries according to an embodiment of the present invention.

[0015] Figure label: Frame 100, conveyor belt 110; Pre-brush assembly 200, liquid storage container 210, pre-brush drive module 220, pre-brush base 221, pre-brush motor 222, pre-brush gear set 223, horizontal linear positioning mechanism 224, vertical linear positioning mechanism 225, coating brush 230, coating shaft 231; Spreading assembly 300, storage container 310, spreading head 320, feed hole 321, discharge hole 322, transfer chamber 323, spreading block 330, spreading shaft 331, capacity adjustment block 332, spreading drive module 340, spreading motor 341, spreading gear set 342. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, if the wire sleeve or frame is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] In the baking process of pastries, to enhance the appearance and taste of the products, it is often necessary to sprinkle granular materials such as sesame seeds, streusel, and icing sugar on the surface of the dough. Baked pastries generally refer to foods that need to be baked in an oven, such as egg yolk pastries and wife cakes, which all require sesame seeds to be sprinkled on their surface. In traditional techniques, the dough is sprinkled manually, but this method is not only inefficient and labor-intensive, but the evenness of the sprinkles also depends entirely on the experience of the operator, resulting in unstable product quality, serious waste of raw materials, and difficulty in meeting the needs of modern, large-scale food production.

[0021] In existing technologies, to improve efficiency, a spreading device is designed to spread granular material onto pastry blanks. This spreading device uses a vibrating screen or perforated roller above the conveyor belt, continuously spreading granular material from the hopper onto the pastry blanks passing below through vibration or rotation. However, the spreading amount is difficult to control precisely, easily resulting in too much or too little spreading. Moreover, this continuous spreading method also spreads material onto areas of the conveyor belt not carrying pastry blanks, leading to significant waste of granular material and equipment contamination. The spreading effect is inconsistent and uneven, easily resulting in material waste. Furthermore, for dry pastry blanks, the spread granular material has poor adhesion and is prone to falling off during subsequent conveying and baking processes, affecting the final product quality. How to ensure that the granular material firmly adheres to the surface of the pastry and prevents it from falling off in subsequent processes remains a technical problem that existing equipment has not solved well. Therefore, there is an urgent need in the field for a single-sided pastry spreading device that integrates coating and spreading functions, provides precise and controllable spreading amount, spreads evenly and adheres firmly, is space-efficient, and has a high degree of automation.

[0022] The following is for reference only. Figure 1 To be continued Figure 8 This invention describes a single-sided coating device for baking pastries, which provides accurate and controllable coating amount, high coating consistency, high material utilization, and stable coating adhesion.

[0023] Reference Figures 1 to 8 A single-sided coating device for baking pastries according to an embodiment of the present invention includes: The frame 100 is equipped with a conveyor belt 110, which is used to drive the pastry blanks forward along the conveying direction; The pre-brush assembly 200 includes a liquid storage container 210, a pre-brush drive module 220, and a coating brush 230. The liquid storage container 210 and the pre-brush drive module 220 are both connected to the frame 100. The liquid storage container 210 is used to store liquid materials such as butter and egg liquid for coating the surface of pastry dough. The liquid storage container 210 and the pre-brush drive module 220 are both located above the conveyor belt 110. The coating brush 230 is connected to the pre-brush drive module 220. The pre-brush drive module 220 is used to drive the coating brush 230 back and forth between the liquid storage container 210 and the conveyor belt 110. The spreading assembly 300 includes a storage container 310, a spreading head 320, a spreading block 330, and a spreading drive module 340. The storage container 310, spreading head 320, and spreading drive module 340 are all connected to the frame 100, and both the storage container 310 and the spreading drive module 340 are located above the conveyor belt 110. The storage container 310 is used to store granular materials such as sesame seeds and crispy bits. The spreading head 320 and the coating brush 230 are distributed along the conveying direction, i.e., the conveyor belt 110 is equipped with... The pre-brushing station and the material spreading station are arranged sequentially along the conveying direction. The coating brush 230, driven by the pre-brushing drive module 220, can reach above the pre-brushing station. The material spreading head 320 is located above the material spreading station, and both the material spreading head 320 and the coating brush 230 are positioned above the conveyor belt 110. The material spreading head 320 has an inlet hole 321, an outlet hole 322, and a transfer chamber 323. Multiple inlet holes 321 and outlet holes 322 are provided, and each inlet hole 321 and outlet hole 322... 2 are respectively connected to the upper and lower ends of the transfer chamber 323. The top end of the feed hole 321 is connected to the bottom outlet of the storage container 310, so that the feed hole 321 communicates with the internal space of the storage container 310. The particulate material in the storage container 310 can be conveyed from the bottom outlet to the transfer chamber 323 through the feed hole 321. The transfer chamber 323 is spherical, and the spreading block 330 is hemispherical to match the transfer chamber 323. The spreading block 330 is disposed in the transfer chamber 323, and the spherical surface of the spreading block 330 is aligned with the surface of the transfer chamber 323. The inner walls of the transfer chamber 323 are in contact with each other. The dispersing block 330 is provided with a dispersing shaft 331. The dispersing shaft 331 is connected to the dispersing drive module 340. The dispersing drive module 340 is used to drive the dispersing block 330 to rotate around the dispersing shaft 331 so that the dispersing block 330 closes the feed hole 321 or the discharge hole 322. The axis of the dispersing shaft 331 is parallel to the horizontal plane. The axis of the dispersing shaft 331 is located on the plane of the dispersing block 330, and the axis of the dispersing shaft 331 passes through the center of the ball of the dispersing block 330.

[0024] In the initial state, the single-sided spreading device of this utility model has the flat surface of the spreading block 330 facing upwards, and the spherical surface of the spreading block 330 is closed at the top of the discharge hole 322. At this time, the discharge hole 322 is closed and the feed hole 321 is open. The granular material in the storage container 310 is conveyed from the bottom outlet through the feed hole 321 to the transfer chamber 323. The pastry blank is placed on the conveyor belt 110, and the conveyor belt 110 drives the pastry blank to move forward along the conveying direction to be conveyed to the pre-brush of the coating brush 230. At the workstation, the pre-brush drive module 220 drives the coating brush 230 to move towards the liquid storage container 210 and pick up the liquid material therein. Then, the pre-brush drive module 220 drives the coating brush 230 to move towards the pastry blank on the conveyor belt 110 and coats the picked-up liquid material onto the top surface of the pastry blank. The conveyor belt 110 drives the pastry blank after the pre-brush liquid material to move along the conveying direction to the spreading station corresponding to the spreading head 320. The spreading drive module 340 drives the spreading block 330 to rotate. The material is rotated until the flat surface of the spreading block 330 faces downwards, and the spherical surface of the spreading block 330 is closed at the bottom of the feed hole 321. At this time, the discharge hole 322 is open and the feed hole 321 is closed. The granular material in the transfer chamber 323 falls onto the surface of the pastry blank through the discharge hole 322. Usually, the spreading action is that the spreading drive module 340 drives the spreading block 330 to rotate 360 ​​degrees, that is, the discharge hole 322 is open for a limited time, which can effectively control the amount of granular material scattered. After completing the 360-degree rotation, the discharge hole 322 is closed again by the spreading block 330 to end the spreading. The spreading effect is uniform and reliable, the spreading amount is highly controllable, and the spreading consistency is high. It can avoid material waste and effectively improve the quality of the output product. By combining the method of first applying liquid material and then spreading granular material, the stability of the granular material adhering to the surface of the pastry blank can be effectively improved. Moreover, the overall structure has a high degree of integration, which can effectively save space and improve the efficiency of the entire production line.

[0025] By providing an inlet hole 321, a transfer chamber 323, and an outlet hole 322 connected sequentially from top to bottom inside the spreading head 320, and by using a hemispherical spreading block 330 to close the outlet hole 322 and open the inlet hole 321, a temporary storage space can be created in the spherical transfer chamber 323 to store a fixed amount of granular material. The spreading drive module 340 drives the spreading block 330 to rotate around a spreading axis 331 parallel to the horizontal plane within the spherical transfer chamber 323. The rotating spreading block 330 then closes the inlet hole 321 and opens the outlet hole 322, and the granular material temporarily stored in the transfer chamber 323 is pushed to the outlet hole 322 and falls. The rotation mode of the spreading block 330 can precisely control the opening and closing time of the discharge hole 322. The amount of material spread is determined by the rotation speed and frequency of the spreading block 330, achieving digital precision control. Through intermittent and quantitative spreading, it fundamentally overcomes the shortcomings of continuous and uncontrollable spreading in existing vibrating screens or drum-type equipment. It can ensure that the amount of material spread on the surface of each batch of dough is consistent, with high consistency and uniform spreading effect, which can significantly improve the product quality of the final baked pastries. Moreover, the spreading action can effectively target the surface of the dough, achieving on-demand spreading. The highly targeted spreading action can avoid idle spreading. The conveyor belt in area 110 performs wasteful material spreading, resulting in high material utilization and reduced pollution of equipment and the environment from scattered materials. This not only significantly saves on the consumption of granular auxiliary materials but also makes the working environment cleaner and reduces the burden of cleaning and maintenance, effectively saving production costs. The pre-brushing component 200 applies viscous liquid materials such as butter and egg wash to the dough before spreading, providing an excellent adhesion base for subsequent granular materials. This effectively improves the adhesion of sesame seeds, crumble toppings, and other granular materials to the dough, significantly reducing the loss of granules due to vibration, temperature differences, etc., during subsequent conveying, fermentation, or baking. During the subsequent baking and heating process, the solidification of the liquid material further enhances the adhesion of the granular material, resulting in a firm and reliable coating effect. This effectively improves the quality of the final baked pastries, enhancing both their appearance and taste. The pre-brushing component 200 and the spreading component 300 are sequentially integrated onto the same conveyor belt 110 along the conveying direction. The device has a reasonable layout and compact structure, effectively shortening the transfer distance between processes. This not only saves the equipment floor space and reduces the overall line cost but also reduces the exposure and waiting time of the pastry dough between processes, helping to maintain product freshness and improving the processing efficiency of the entire production line.

[0026] It is understandable that the spreading block 330 has a capacity adjustment block 332 on its flat surface. The capacity adjustment block 332 protruding from the surface of the spreading block can effectively adjust the capacity of the transfer storage space formed between the spreading block 330 and the transfer chamber 323. By reducing the capacity of the transfer storage space, when the spreading block 330 flips to close the feed hole 321 and open the discharge hole 322, it can effectively prevent the granular material from falling out of the discharge hole 322 in excess. It can effectively control the spreading amount and spreading speed, and the spreading uniformity is controllable and the spreading consistency is high.

[0027] When it is necessary to reduce the amount of material dispensed at one time, a larger capacity adjustment block 332 can be installed, thereby reducing the available volume of the transfer and storage space. The dispensing head 320 is designed as a separate unit, allowing for easy assembly and disassembly. When the dispensing block 330 rotates to the position where the discharge hole 322 is open, only a limited amount of granular material within the transfer and storage space can fall. This design enables quantitative and fine-tuning of the amount of material dispensed at one time, fundamentally avoiding the problem of excessive dispensing that may occur due to a fixed cavity volume. This allows the present invention to flexibly adapt to the different dispensing requirements of various pastry products, significantly improving the controllability, uniformity, and batch-to-batch consistency of the dispensing amount.

[0028] Understandably, the surface of the capacity adjustment block 332 is a smooth arc surface. By setting the surface of the capacity adjustment block 332 to a smooth arc surface, the frictional resistance of the granular material flowing in the cavity is greatly reduced. When the spreading block 330 is flipped, the granular material can smoothly slide into the temporary storage space along the smooth arc surface or be discharged from the discharge hole 322, effectively preventing the accumulation, blockage or poor discharge of materials in corners, ensuring the stability and reliability of the spreading process, especially for granular materials that are prone to static electricity or have a certain degree of stickiness.

[0029] It is understood that there are multiple spreading heads 320 and spreading blocks 330. Each spreading block 330 is located in the transfer cavity 323 of the corresponding spreading head 320. The spreading drive module 340 includes a spreading motor 341 and a spreading gear set 342. The spreading motor 341 is connected to the frame 100. Each spreading shaft 331 is connected to the spreading motor 341 through the spreading gear set 342, so that one spreading motor 341 can drive multiple spreading blocks 330 to rotate, so as to achieve synchronous spreading action. All spreading heads 320 achieve absolute synchronous opening and closing, ensuring that the timing and duration of spreading are exactly the same for multiple dough blanks in the same row. The product consistency is extremely high, the electrical control system is simplified, the manufacturing cost and equipment energy consumption are reduced, and potential failure points are reduced, improving the reliability of the equipment. Moreover, the gear transmission structure is compact, which makes it easy to arrange multiple spreading heads 320 in a limited installation space.

[0030] Specifically, the spreading gear set 342 includes a spreading drive gear, a spreading driven gear, and a spreading transmission gear. The spreading drive gear is connected to the spreading motor 341. Each spreading driven gear is coaxially fixedly connected to the spreading shaft 331. Every two adjacent spreading driven gears are driven by the spreading transmission gear. The spreading transmission gear is meshed with the corresponding spreading driven gear. The spreading drive gear is meshed with one of the spreading transmission gears or the spreading driven gear.

[0031] Understandably, there are multiple coating brushes 230, and the number of coating brushes 230 is equal to the number of material spreading heads 320. This configuration enables the device to simultaneously perform coating and spreading operations on multiple dough blanks conveyed side by side on the conveyor belt 110, ensuring the matching of pre-brushing and spreading processes in terms of capacity, avoiding production bottlenecks caused by inconsistent process cycles, greatly improving the processing efficiency and automation level of the entire production line, and effectively ensuring processing efficiency and reliability.

[0032] It is understood that the pre-brush drive module 220 includes a rotary drive module and a two-dimensional drive module. The two-dimensional drive module is connected to the frame 100, and the rotary drive module is connected to the two-dimensional drive module. Each coating brush 230 has a coating shaft 231 at its top. Each coating shaft 231 is perpendicular to the horizontal plane and is connected to the rotary drive module. The rotary drive module is used to drive the coating brush 230 to rotate around the coating shaft 231. The coating brush 230 can rotate through the rotary drive module, and the coating brush 230 uniformly coats the surface of the spot material in a rotating manner, which can effectively improve the uniformity and adhesion stability of the liquid material coating.

[0033] It should be further explained that the coating brush 230 is not stationary when it comes into contact with the surface of the dough, but is in a rotating state. This rotational motion can spread liquid materials such as egg liquid and butter evenly and press them into the tiny pores of the surface of the dough. Compared with simple scraping or dripping, the coating layer is thinner and more uniform, avoiding local liquid accumulation and laying a perfect foundation for the firm adhesion of subsequent particulate materials.

[0034] Understandably, the rotary drive module includes a pre-brush holder 221, a pre-brush motor 222, and a pre-brush gear set 223. The pre-brush holder 221 is connected to the two-dimensional drive module, and the pre-brush motor 222 is connected to the pre-brush holder 221. Each coating shaft 231 is connected to the pre-brush motor 222 via the pre-brush gear set 223, enabling one pre-brush motor 222 to drive multiple coating brushes 230 to rotate, thus achieving synchronous pre-brushing. To improve the stability of the rotational motion of the coating brushes 230, the coating shaft 231 is rotatably connected to the pre-brush holder 221. The combination of two-dimensional drive and rotary drive realizes a mechanical automatic cycle of "dipping-moving-descending-rotating coating-rising-returning," resulting in smooth operation and high efficiency.

[0035] Specifically, the pre-brush gear set 223 includes a pre-brush driven gear and a pre-brush transmission gear. Each pre-brush driven gear is coaxially fixedly connected to the coating shaft 231. Every two adjacent pre-brush driven gears are driven by the pre-brush transmission gear. The pre-brush transmission gear is meshed with the corresponding pre-brush driven gear. One of the pre-brush transmission gears or pre-brush driven gears is connected to the pre-brush motor 222.

[0036] Understandably, the two-dimensional drive module includes a horizontal linear positioning mechanism 224 and a vertical linear positioning mechanism 225. The horizontal linear positioning mechanism 224 is connected to the frame 100, and the vertical linear positioning mechanism 225 is connected to the horizontal linear positioning mechanism 224. The pre-brush holder 221 is connected to the vertical linear positioning mechanism 225. The horizontal linear positioning mechanism 224 is used to drive the coating brush 230 to reciprocate horizontally between the liquid storage container 210 and the pre-brush station. The vertical linear positioning mechanism 225 is used to drive the coating brush 230 to descend to reach the surface of the preform or into the liquid storage container 210. The vertical linear positioning mechanism 225 is also used to drive the coating brush 230 to rise to avoid obstacles.

[0037] The horizontal linear positioning mechanism 224 and the vertical linear positioning mechanism 225 can both be configured as lead screw positioning mechanisms for driving linear motion in the corresponding dimension, which have the advantages of high positioning accuracy, good self-locking, and smooth transmission. Alternatively, the horizontal linear positioning mechanism 224 and the vertical linear positioning mechanism 225 can both be configured as rodless cylinders for driving linear motion in the corresponding dimension.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A single-sided coating device for baking pastries, characterized in that, include: The frame (100) is equipped with a conveyor belt (110). The pre-brush assembly (200) includes a liquid storage container (210), a pre-brush drive module (220), and a coating brush (230). The liquid storage container (210) and the pre-brush drive module (220) are both connected to the frame (100). The coating brush (230) is connected to the pre-brush drive module (220). The pre-brush drive module (220) is used to drive the coating brush (230) back and forth between the liquid storage container (210) and the conveyor belt (110). The spreading assembly (300) includes a storage container (310), a spreading head (320), a spreading block (330), and a spreading drive module (340). The storage container (310), the spreading head (320), and the spreading drive module (340) are all connected to the frame (100). The spreading head (320) and the coating brush (230) are both located above the conveyor belt (110). The spreading head (320) has an inlet hole (321), an outlet hole (322), and a transfer chamber (323). The inlet hole (321) and the outlet hole (322) are respectively connected to the frame (100). The upper and lower ends of the transfer cavity (323) are connected to the bottom end of the storage container (310) at the top and bottom ends of the feed hole (321). The transfer cavity (323) is spherical and the dispersing block (330) is hemispherical. The dispersing block (330) is located in the transfer cavity (323). The spherical surface of the dispersing block (330) abuts against the inner wall of the transfer cavity (323). The dispersing block (330) is provided with a dispersing shaft (331) parallel to the horizontal plane. The dispersing shaft (331) is connected to the dispersing drive module (340). The dispersing shaft (331) is located on the plane of the dispersing block (330).

2. The single-sided coating device for baking pastries according to claim 1, characterized in that, The dispensing block (330) has a capacity adjustment block (332) on its plane.

3. The single-sided coating device for baking pastries according to claim 2, characterized in that, The surface of the capacity adjustment block (332) is a smooth arc surface.

4. The single-sided coating device for baking pastries according to claim 1, characterized in that, The spreading head (320) and the spreading block (330) are provided in multiple ways. The spreading drive module (340) includes a spreading motor (341) and a spreading gear set (342). Each spreading shaft (331) is connected to the spreading motor (341) through the spreading gear set (342).

5. A single-sided coating device for baking pastries according to claim 4, characterized in that, Multiple coating brushes (230) are provided, and the number of coating brushes (230) is equal to the number of dispensing heads (320).

6. The single-sided coating device for baking pastries according to claim 5, characterized in that, The pre-brush drive module (220) includes a rotary drive module and a two-dimensional drive module. The rotary drive module is connected to the two-dimensional drive module. Each of the coating brushes (230) has a coating shaft (231) at its top. Each coating shaft (231) is perpendicular to the horizontal plane and is connected to the rotary drive module. The rotary drive module is used to drive the coating brush (230) to rotate.

7. A single-sided coating device for baking pastries according to claim 6, characterized in that, The rotary drive module includes a pre-brush holder (221), a pre-brush motor (222), and a pre-brush gear set (223). The pre-brush holder (221) is connected to the two-dimensional drive module, and the pre-brush motor (222) is connected to the pre-brush holder (221). Each of the coating shafts (231) is connected to the pre-brush motor (222) through the pre-brush gear set (223).

8. A single-sided coating device for baking pastries according to claim 7, characterized in that, The two-dimensional drive module includes a horizontal linear positioning mechanism (224) and a vertical linear positioning mechanism (225). The horizontal linear positioning mechanism (224) is connected to the frame (100), the vertical linear positioning mechanism (225) is connected to the horizontal linear positioning mechanism (224), and the pre-brush seat (221) is connected to the vertical linear positioning mechanism (225).

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