Continuous multi-station bread dough making machine

Abstract

The invention relates to the technical field of food machinery, in particular to a bread dough continuous multi-station cake making machine which comprises a rack. A feeding mechanism and a conveying mechanism are installed on the top of the machine frame, and the output face of the feeding mechanism and the output face of the conveying mechanism are coplanar and flush. The feeding mechanism and the conveying mechanism are both belt conveying mechanisms; a lifting device is installed on the installation frame, the output end of the lifting device is connected with a synchronous part, and a plurality of hole pressing die heads and the like are installed at the bottom of the synchronous part in the transverse direction at intervals. The hole pressing die head made of the polytetrafluoroethylene material is not prone to adhering to dough, and the die head can be effectively prevented from taking up the dough in the rising process in cooperation with the restraining effect of the limiting frame plate; even if a small amount of dough moves upwards along with the die head, the small amount of dough can be blocked by the limiting frame plate and pushed back to the conveying belt, the situation that follow-up hole pressing is affected by accumulation is avoided, in addition, multi-station synchronous hole pressing is matched with a guide mechanism and PLC control, and efficient and less-shutdown continuous cake making operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of food machinery technology, and more specifically to a continuous multi-station bread dough making machine. Background Technology

[0002] In the automated production process of filled pasta foods such as bread and buns, after the dough is conveyed, filled and shaped, it is often necessary to punch a specific concave hole in the center of the top of the dough to meet the process requirements of subsequent filling, sauce injection or to prevent the top from over-expanding and cracking during baking. Currently, the common technical approach used in the industry is to add a secondary stamping station after the shaping process. A rigid punch installed at the end of the lifting drive mechanism is used to vertically press down the moving dough blank. Existing technologies mostly use stainless steel, aluminum alloy and other metal materials, or some ordinary engineering plastics to make cylindrical or conical solid punches. The fixed-point punching operation is completed through simple reciprocating motion in conjunction with the belt conveyor line. This type of device has a relatively simple structure and is easy to integrate into existing continuous production lines. It is a standard configuration for achieving standardization of the appearance and functional processing of pasta. However, the current problem is that, due to the high viscosity, high moisture content, and soft and easily deformable physical characteristics of the dough, traditional metal punches or ordinary plastic punches have a large coefficient of friction and lack effective anti-sticking and demolding performance. During the return stroke after stamping, they are very likely to stick to the dough, causing the dough to be lifted by the punch and resulting in overall displacement, top tearing, or damage to the edge of the concave hole. More seriously, some dough will completely adhere to the surface of the punch, which not only causes product appearance defects and reduced yield, but also forces the production line to frequently stop for manual cleaning and maintenance, seriously interfering with the continuity of the production line. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems commonly found in existing bread dough punching machines during the high-viscosity dough punching process, such as die head sticking, multi-station positioning inaccuracy, and insufficient stability in continuous operation. This invention provides a continuous multi-station bread dough punching machine that can achieve non-sticking during the punching process, accurate multi-station positioning, and stable operation.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution: This invention proposes a continuous multi-station bread dough making machine, including a frame; The top of the frame is equipped with a feeding mechanism and a feeding mechanism, and the output surfaces of the feeding mechanism and the feeding mechanism are coplanar and flush. Both the feeding mechanism and the conveying mechanism are belt conveyor mechanisms; The mounting frame is equipped with a lifting device, the output end of which is connected to a synchronizing element, and multiple pressing die heads are installed at horizontal intervals at the bottom of the synchronizing element. The mounting bracket is also equipped with a limiting bracket plate, which is located directly below the punching die head and has limiting holes corresponding to each punching die head. The axis of each limiting hole coincides with the axis of the corresponding punching die head. The punching die is made of polytetrafluoroethylene material by injection molding or compression molding.

[0005] As a preferred embodiment of the present invention, the punching die head has a cylindrical structure; The bottom end face of the cylinder is either a plane or a convex spherical surface; When the bottom is flat, its flat edge is rounded.

[0006] As a preferred embodiment of the present invention, the density of the puncture die is 2.1-2.3 g / cm³. 3 Its surface is polished, and its roughness Ra≤0.4 μm.

[0007] As a preferred embodiment of the present invention, the inner diameter of the limiting hole is 1-3 mm larger than the outer diameter of the corresponding pressing die.

[0008] As a preferred embodiment of the present invention, the feeding mechanism is provided with two sets of guiding mechanisms, which are respectively located on both sides of the mounting frame; The guiding mechanism includes a bracket, a U-shaped slide rail, a guide frame, and guide rollers; The U-shaped slide rail is installed on both sides of the feeding mechanism by a bracket, and a guide frame is slidably connected inside the U-shaped slide rail; The guide frame is equipped with several guide rollers via bearings; The U-shaped slide rail is provided with several fixing holes, and the guide frame is locked in position by fixing bolts cooperating with the fixing holes.

[0009] As a preferred embodiment of the present invention, the punching die is detachably connected to the bolt at the bottom of the synchronizing member via a countersunk screw hole at the top; The depth of the countersunk screw hole is 1 / 3–2 / 5 of the overall height of the piercing die.

[0010] As a preferred embodiment of the present invention, the lifting device is a double guide rod cylinder, and the end of its piston rod is connected to the synchronizing member through a floating joint.

[0011] As a preferred embodiment of the present invention, the belt conveyor mechanism includes an annular conveyor belt, a drive pulley, a driven pulley, a tension pulley, and a servo motor; The annular conveyor belt consists of two or more belts, which are arranged in parallel and their center lines are equidistantly distributed. The spacing between the center lines of two adjacent belts is 80–150 mm.

[0012] As a preferred embodiment of the present invention, the mounting frame is further provided with a dust cover to cover the lower area of ​​the punching die, the limiting frame plate and the synchronizing component.

[0013] As a preferred embodiment of the present invention, the servo motor of the belt conveyor mechanism and the lifting device are both connected to the same PLC control system.

[0014] The beneficial effects of this invention are as follows: This invention uses a pressing die head made of polytetrafluoroethylene (PTFE), which is not prone to dough sticking. Combined with the constraint of the limiting frame plate, it can effectively prevent the die head from carrying the dough up during the upward process. Even if a small amount of dough moves upward with the die head, it will be blocked by the limiting frame plate and pushed back onto the conveyor belt, avoiding accumulation and affecting subsequent pressing. In addition, multi-station synchronous pressing, combined with the guiding mechanism and PLC control, realizes efficient and continuous pancake making operation with less downtime. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the guiding mechanism of the present invention; Figure 4 This is a schematic diagram of the bottom convex spherical structure of the punching die head of the present invention; Figure 5 This is a schematic diagram of the bottom planar structure of the punching die head of the present invention.

[0016] Reference numerals: 1-Frame, 2-Feeding mechanism, 3-Mounting frame, 4-Lifting device, 5-Synchronizer, 6-Pressing die head, 7-Limiting plate, 71-Limiting hole, 8-Dust cover, 9-Feeding mechanism, 10-Guiding mechanism, 101-Bracket, 102-U-shaped slide rail, 103-Guiding frame, 104-Fixing hole, 105-Fixing bolt, 106-Guiding roller. Detailed Implementation

[0017] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] Reference Figure 1 As shown, the present invention proposes a continuous multi-station bread dough making machine, including a frame; The top of the frame is equipped with a feeding mechanism and a feeding mechanism, and the output surfaces of the feeding mechanism and the feeding mechanism are coplanar and flush. Both the feeding mechanism and the conveying mechanism are belt conveyor mechanisms; The mounting frame is equipped with a lifting device, the output end of which is connected to a synchronizing element, and multiple pressing die heads are installed at horizontal intervals at the bottom of the synchronizing element. The mounting bracket is also equipped with a limiting bracket plate, which is located directly below the punching die head and has limiting holes corresponding to each punching die head. The axis of each limiting hole coincides with the axis of the corresponding punching die head. The punch head is made of polytetrafluoroethylene (PTFE) material by injection molding or compression molding. The integral injection molding or compression molding structure ensures that the working end face is seamless, without coating, and without micropores, thus eliminating the hygiene and reliability hazards such as easy material accumulation in traditional metal punches and easy aging and peeling of ordinary plastic punches. The punching die head is a cylindrical structure; The bottom end face of the cylinder is either a plane or a convex spherical surface; When the bottom is flat, its flat edges are rounded. The main body of the punching die is a Φ30 mm-40 cylinder with a total height of 50-60 mm. For sweet bread dough and other products with high gluten content and a moisture content of ≤65%, the bottom end of the die is machined into a flat end face and rounded with a R1-2 mm carbide tool. For soft European bread, custard bread and other products with low gluten content and a moisture content of ≥68%, the bottom end of the die is machined into a convex spherical surface (spherical crown shape) using a CNC lathe. The radius of curvature of the spherical surface is 15-20 mm and the height of the spherical crown is 1.5-2 mm. In actual applications, the die diameter, total height and spherical parameters can be adjusted according to different product requirements. This application does not limit these parameters. During operation, the flat end face with rounded corners can form sharp-edged, uniformly deep concave holes under lower pressure; the spherical end face expands the initial contact from point / line to a small area, effectively dispersing the indentation stress and preventing local collapse or tensile cracking of the blank.

[0019] The density of the puncture die head is 2.1-2.3 g / cm³. 3 Its surface is polished with a roughness Ra≤0.4 μm. This density ensures that the mold head has sufficient rigidity to resist high-frequency impact deformation, while the ultra-low roughness surface greatly reduces the actual contact between the dough and the mold head, weakens the van der Waals force adsorption, and makes the demolding action lighter and more reliable.

[0020] The inner diameter of the limiting hole is 1-3 mm larger than the outer diameter of the corresponding pressing die, forming a gap; this gap allows the die to slide freely within the limiting hole without friction interference.

[0021] The feeding mechanism is equipped with two sets of guiding mechanisms, which are located on both sides of the mounting frame. The guiding mechanism includes a bracket, a U-shaped slide rail, a guide frame, and guide rollers; The U-shaped slide rail is installed on both sides of the feeding mechanism by a bracket, and a guide frame is slidably connected inside the U-shaped slide rail; The guide frame is equipped with several guide rollers via bearings. The axis of each guide roller is parallel to the conveying direction of the feeding mechanism, and the outer periphery is covered with a food-grade silicone layer. The U-shaped slide rail is provided with several fixing holes, and the guide frame is locked in position by fixing bolts cooperating with the fixing holes; During operation, the operator loosens the fixing bolts according to the current dough width (e.g., 80 mm or 110 mm), slides the guide frame along the U-shaped groove to the appropriate position, and then locks it. The dough is held by the guide rollers on both sides during conveying, automatically centering and moving forward to ensure accurate entry into the pressing area and subsequent output position.

[0022] The punching die head is detachably connected to the bolt at the bottom of the synchronizing component via a countersunk screw hole at the top. The depth of the countersunk screw hole is 1 / 3–2 / 5 of the overall height of the piercing die head, ensuring that the bolt head is completely embedded in the die head body.

[0023] The lifting device is a double-guide rod cylinder, and the end of its piston rod is connected to the synchronizing element through a floating joint.

[0024] The belt conveyor mechanism includes an annular conveyor belt, a drive pulley, a driven pulley, a tension pulley, and a servo motor. The annular conveyor belt consists of two or more belts, which are arranged in parallel and their center lines are equidistantly distributed. The spacing between the center lines of two adjacent belts is 80–150 mm.

[0025] The belt conveyor mechanism includes an annular conveyor belt, a drive pulley, a driven pulley, a tension pulley, and a servo motor. The annular conveyor belt consists of two or more belts, which are arranged in parallel and their center lines are equidistantly distributed. The distance between the center lines of two adjacent belts is 80–150 mm. In specific implementation, two food-grade PU circular conveyor belts are used, driven by a servo motor through a synchronous belt to the main shaft. The main shaft is equipped with a drive wheel or a driven wheel (the drive wheel or driven wheel is connected by a conveyor belt). In practical applications, the number of belts (such as three or four), the bandwidth and the center distance can be adjusted according to the product layout and production capacity requirements. This application embodiment does not limit this.

[0026] The mounting frame is also equipped with a dust cover to cover the lower area of ​​the punching die, the limiting frame plate and the synchronization component. The dust cover physically isolates the core execution components from the external environment, effectively preventing flour dust, steam condensate and lubricating oil mist from intruding, and keeping the die surface and the limiting frame plate clean.

[0027] The servo motor of the belt conveyor mechanism and the lifting device are both connected to the same PLC control system. The PLC acts as the command source, coordinating the conveying speed, blank positioning, pressing timing and return reset in real time to realize a series of operations such as material receiving, positioning, pressing and removing. The PLC control system is equipped with an HMI (Human Machine Interface) that supports setting the pressing frequency (15–60 times / minute), pressing stroke (5–25 mm), holding time (0.3–2.0 s), and multi-speed conveying linkage logic. The PLC control system is also coupled with a photoelectric sensor array to detect the bread dough's position in real time and trigger the lifting device to perform single or continuous pressing actions.

[0028] Working principle: The dough is conveyed to the pressing station by the feeding mechanism. The two guiding mechanisms first center and constrain it to ensure that it accurately enters the target area between the two belts. When the photoelectric sensor detects that the dough is in place, the PLC control system issues a command to trigger the action of the double guide rod cylinder while maintaining the uniform speed of the servo motor driving the belt. The cylinder piston rod drives the synchronous component to move vertically downward through the floating joint, so that multiple PTFE pressing dies pass through the limiting holes of the limiting plate and press into the top of the dough. Due to the extremely low surface friction coefficient and self-lubrication of PTFE material, the adsorption force between the working end face of the die and the dough is significantly reduced, and the dough basically does not stick during the upward process after pressing. After being deformed by pressure, the dough can quickly and completely rebound and detach, rather than being "hooked" or "pulled" (during the return stroke, if a small amount of dough adheres to the die head and moves upwards, it will be blocked by the lower surface of the limiting plate, and under the combined action of gravity and the continued upward movement of the die head, it will be pushed away from the die head and fall naturally back onto the conveyor belt, thus effectively preventing the dough from accumulating between the die head and the limiting plate, ensuring the continuous and stable operation of the pancake machine. The premise for stable operation in this process is the use of a polytetrafluoroethylene (PTFE) perforated die head, that is, its surface adhesion is reduced to a minimum level; if a metal or ordinary plastic die head is used, the adhesion is large and the adhesion is strong, and the limiting plate will not only fail to push it off, but will also accelerate the accumulation of dough and cause jamming.

[0029] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A continuous multi-station bread dough pounding machine, comprising a frame (1); The top of the frame (1) is equipped with a feeding mechanism (2) and a feeding mechanism (9), and the output surfaces of the feeding mechanism (2) and the feeding mechanism (9) are coplanar and flush. Both the feeding mechanism (2) and the conveying mechanism (9) are belt conveyor mechanisms; Its features are: A mounting bracket (3) is fixedly installed on the frame (1), and the mounting bracket (3) is located directly above the output surface of the feeding mechanism (2); A lifting device (4) is installed on the mounting frame (3). The output end of the lifting device (4) is connected to a synchronizing element (5). Multiple pressing die heads (6) are installed at horizontal intervals at the bottom of the synchronizing element (5). The mounting bracket (3) is also equipped with a limiting bracket plate (7). The limiting bracket plate (7) is located directly below the punching die (6) and is provided with limiting holes corresponding to each punching die (6). The axis of each limiting hole coincides with the axis of the corresponding punching die (6). The punching die (6) is made of polytetrafluoroethylene material by injection molding or compression molding.

2. The continuous multi-station bread dough making machine according to claim 1, characterized in that: The punching die (6) has a cylindrical structure; The bottom end face of the cylinder is either a plane or a convex spherical surface; When the bottom is flat, its flat edge is rounded.

3. The continuous multi-station bread dough kneading machine according to claim 1, characterized in that: The density of the puncture die (6) is 2.1-2.3 g / cm³. 3 Its surface is polished, and its roughness Ra≤0.4 μm.

4. The continuous multi-station bread dough making machine according to claim 1, characterized in that: The inner diameter of the limiting hole (71) is 1-3 mm larger than the outer diameter of the corresponding pressing die (6).

5. A continuous multi-station bread dough kneading machine according to claim 1, characterized in that: The feeding mechanism (2) is provided with two sets of guiding mechanisms (10), which are located on both sides of the mounting frame (3); The guiding mechanism (10) includes a bracket (101), a U-shaped slide rail (102), a guide frame (103), and a guide roller (106). The U-shaped slide rail (102) is installed on both sides of the feeding mechanism (2) via a bracket (101), and a guide frame (103) is slidably connected inside the U-shaped slide rail (102). The guide frame (103) is equipped with a number of guide rollers (106) via bearings. The U-shaped slide rail (102) is provided with several fixing holes (104), and the guide frame (103) is locked in position by the fixing bolt (105) cooperating with the fixing holes (104).

6. A continuous multi-station bread dough kneading machine according to claim 1, characterized in that: The punching die (6) is detachably connected to the bolt at the bottom of the synchronizing member (5) through a countersunk screw hole at the top; The depth of the countersunk screw hole is 1 / 3–2 / 5 of the overall height of the piercing die (6).

7. A continuous multi-station bread dough making machine according to claim 1, characterized in that: The lifting device (4) is a double guide rod cylinder, and the end of its piston rod is connected to the synchronizing member through a floating joint.

8. A continuous multi-station bread dough making machine according to claim 1, characterized in that: The belt conveyor mechanism includes an annular conveyor belt, a drive pulley, a driven pulley, a tension pulley, and a servo motor; The annular conveyor belt consists of two or more belts, which are arranged in parallel and their center lines are equidistantly distributed. The spacing between the center lines of two adjacent belts is 80–150 mm.

9. A continuous multi-station bread dough making machine according to claim 1, characterized in that: The mounting bracket (3) is also covered with a dust cover (8) to cover the lower area of ​​the punching die (6), the limiting bracket plate (7) and the synchronizing component (5).

10. A continuous multi-station bread dough making machine according to claim 1, characterized in that: The servo motor of the belt conveyor mechanism and the lifting device (4) are both connected to the same PLC control system.

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