Steamed bun blank forming device

Abstract

The invention belongs to the technical field of food machinery, and particularly relates to a steamed bun blank forming device which performs square-to-round forming without changing the temperature of a dough blank and comprises a forming rack, and a pressing-breaking shaping mechanism, a steamed bun blank cutting mechanism and a rubbing roller mechanism are arranged on the forming rack from front to back. A steamed bun blank shaping clamping hand is arranged on the forming rack and located on the rear side of the rubbing roller mechanism, the steamed bun blank shaping clamping hand comprises a supporting frame, guide rods are arranged on the supporting frame in a crossed mode and sequentially arranged, clamping jaw assemblies are arranged on the two sides of each guide rod respectively, and a driving assembly used for driving the clamping jaw assemblies to correspondingly move along the guide rods is arranged on the supporting frame. Due to the fact that the steamed bun blank shaping clamping hand is provided with the four clamping jaw assemblies, each clamping jaw assembly is provided with one shaping clamping plate, and the inner side face of each shaping clamping plate is an arc-shaped face, the steamed bun blank shaping clamping hand can be folded under driving of the driving assembly to conduct final shaping on steamed bun blanks. And finally formed steamed bun blanks are more attractive.

Description

Technical Field

[0001] The invention belongs to the technical field of food machinery, and in particular relates to a steamed bun blank forming device. Background Art

[0002] The steamed bun machine is a device for processing the dough column into steamed bun blanks, and then the steamed bun blanks are steamed to make steamed buns. The steamed bun machine can continuously and batch-process the dough column into steamed bun blanks, which greatly improves the efficiency of making steamed buns. In our previous generation of steamed bun machines (see Chinese patent document with publication number CN114504005A), the steamed bun machine processes the dough column into steamed bun blanks through a set of steamed bun blank forming components, which include a pressing block, an opposing rotating wheel, an extruding block, a cutting knife, a post-cutting shaping device and other components, wherein a plurality of pressing blocks are provided, and the bottom surface thereof matches the top shape of the steamed bun blank to be made, the opposing rotating wheels separate the dough column by horizontal extrusion to initially form individual steamed bun blanks, the extruding block further separates the adhesion parts between the initially separated steamed bun blanks by longitudinal extrusion, the cutting knife is used to completely cut off the adhesion parts between the steamed bun blanks, and the post-cutting shaping device is used to trim the incisions formed by cutting on the steamed bun blanks.

[0003] The following aspects need to be improved in this previous generation steamed bun machine: (1) In the process of shaping the steamed bun blank by the shaping device, the top of the steamed bun is mainly shaped into an arc, and then the cuts on both sides of the steamed bun blank are arranged to the bottom of the steamed bun blank. The final steamed bun blank is not aesthetically pleasing, so it needs to be further shaped. (2) In this previous generation steamed bun machine, when the dough bands adhering to adjacent steamed bun blanks are cut by the cutting knife, only the process of cutting the dough bands is performed, the function is single, and the function of the entire cutting mechanism is not fully developed. (3) In this previous generation steamed bun machine, after the vertical extrusion by the extrusion block, the dough bands connecting the adjacent steamed bun blanks are wide, and the cut formed by the cutting knife after cutting the dough bands is large. The subsequent trimming of the cuts is likely to leave scars on the steamed bun blanks, resulting in the surface of the steamed buns being not smooth enough and prone to obvious scars or cracks. Summary of the invention

[0004] The present invention aims to provide a steamed bun blank forming device, through which the steamed bun blank can be shaped so that the steamed bun blank has a more beautiful shape.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: Provided is a steamed bun blank forming device, including a forming frame. A breaking and shaping mechanism, a steamed bun blank cutting mechanism, and a rolling mechanism are arranged on the forming frame from front to back. A plurality of first die pressing block assemblies for shaping the top of the steamed bun blank are further arranged on the forming frame. A steamed bun blank shaping gripper is arranged on the forming frame behind the rolling mechanism. The steamed bun blank shaping gripper includes a support frame. A first guide rod and a second guide rod which are arranged crosswise are arranged on the support frame. Claw assemblies are respectively arranged on both sides of the first guide rod and the second guide rod. A driving component for driving the claw assemblies to move correspondingly along the first guide rod or the second guide rod is arranged on the support frame, so that the four claw assemblies perform closing or opening actions; each claw assembly respectively includes a claw support and a shaping clamping plate. The shaping clamping plate is arranged at the bottom of the claw support, and the inner side surface of the shaping clamping plate is an arc surface.

[0006] Preferably, the driving component includes a rotating disk arranged on the support frame. Four arc-shaped guide grooves are arranged on the rotating disk. Guide wheels are respectively arranged on each claw support, and the guide wheels are correspondingly arranged in the guide grooves. The driving component further includes a first swing rod connected to the rotating disk, and the first swing rod is used for driving the rotating disk to rotate back and forth.

[0007] Preferably, the claw support includes a vertical rod. A moving slider corresponding to the first guide rod or the second guide rod is arranged at the top of the vertical rod. A cross bar portion is arranged at the bottom of the vertical rod. A clamping plate connecting rod which intersects with the cross bar portion is arranged behind the shaping clamping plate, and the clamping plate connecting rod is connected to the cross bar portion through an adjustable connecting component; A middle pressing plate is further arranged at the bottom of the support frame, and the middle pressing plate is located between the four claw assemblies.

[0008] Preferably, a steamed bun blank preliminary cutting gripper is further arranged on the forming frame between the breaking and shaping mechanism and the steamed bun blank cutting mechanism. The steamed bun blank preliminary cutting gripper includes two relatively arranged gripper assemblies. The gripper assembly includes a vertical knife and a knife handle. The vertical knife is installed on the knife handle, and a first spring is arranged between the vertical knife and the knife handle, so that the vertical knife can telescopically move up and down on the knife handle when stressed. The vertical knife includes a knife body portion. A vertical knife edge portion is arranged on one side of the knife body portion, and an extrusion knife edge is arranged on the side of the knife edge portion.

[0009] Preferably, a knife handle guide hole matching the knife handle is arranged in the knife body portion of the vertical knife. The lower part of the knife handle is arranged in the knife handle guide hole. A bottom cover connected to the knife handle is arranged at the bottom of the knife body portion; A spring groove is arranged on the knife handle, the first spring is arranged in the spring groove, and the upper middle part of the knife handle guide hole is enlarged into a spring hole matching the first spring.

[0010] Preferably, the lower end of the cutting edge portion extends downward relative to the tool body portion; the bottom surface of the cutting edge portion is a plane; the extrusion cutting edge is an arc-shaped cutting edge.

[0011] Preferably, the steamed bun blank cutting mechanism includes a driving frame, on which there are two knife plate assemblies for front-back clamping. The driving frame is used to drive the two knife plate assemblies to approach or move away from each other in the clamping direction. The knife plate assembly includes a knife plate, the inner side surface of the knife plate is bent outward into an arc shape, a cutting edge is provided at the bottom of the knife plate, and the top of the knife plate is installed on the driving frame through a knife plate holder; it further includes a second die pressing block assembly, the second die pressing block assembly includes a second die pressing block and a die pressing bracket, the two side surfaces of the second die pressing block are arc-shaped surfaces matching the inner side surface of the knife plate, the second die pressing block is installed on the die pressing bracket, the second die pressing block is arranged between the two knife plates, and the bottom of the second die pressing block is an upward-arching arc-shaped bottom surface.

[0012] Preferably, the knife plate holder includes a guiding block and a telescopic slider. A guiding hole matching the telescopic slider is provided in the guiding block. The upper part of the telescopic slider is arranged in the guiding hole. An upper end cover connected to the telescopic slider is provided at the top of the guiding block, and a second spring is arranged between the guiding block and the telescopic slider; the top of the knife plate is connected to the telescopic slider.

[0013] Preferably, the driving frame includes a first cross arm, on which a third guide rod in the front-back direction is provided. Second cross arms are respectively arranged on both sides of the first cross arm on the third guide rod. The knife plate holder is installed on the second cross arms; a rotary support shaft is further provided on the first cross arm. A rotatable connecting rod frame is provided on the rotary support shaft. Vertical shafts are respectively provided on the two second cross arms on both sides. The connecting rod frame has two connecting rod parts respectively rotatably connected to the vertical shafts; the driving frame further includes a second swing rod for driving the connecting rod frame to swing. The die pressing bracket includes a fourth guide rod movably arranged up and down at one end of the first cross arm. The second die pressing block is arranged at the bottom of the fourth guide rod, and a third spring is sleeved on the fourth guide rod. The third spring is clamped between the second die pressing block and the first cross arm.

[0014] Preferably, the breaking and shaping mechanism includes spaced clamping rollers and vertical extrusion blocks. Each of the first die pressing block assemblies is arranged alternately between the clamping rollers, the vertical extrusion blocks, the steamed bun blank primary cutting grippers, the steamed bun blank cutting mechanism, and the rolling rollers mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The steamed bun blank forming device is provided with a steamed bun blank shaping gripper, which includes a support frame. On the support frame, a first guide rod and a second guide rod are arranged crosswise. On both sides of the first guide rod and the second guide rod, gripper assemblies are respectively provided. The support frame is provided with a driving assembly for driving the gripper assemblies to move correspondingly along the first guide rod or the second guide rod, so that the four gripper assemblies perform closing or opening actions. Since the steamed bun blank shaping gripper is provided with four gripper assemblies, each gripper assembly is provided with a shaping clamping plate, and the inner side surface of the shaping clamping plate is an arc surface. Thus, under the drive of the driving assembly, it can close to perform the final shaping of the steamed bun blank, making the finally formed steamed bun blank more beautiful. And this steamed bun blank forming device performs square-to-round forming without changing the temperature of the dough blank itself.

[0016] 2. The steamed bun blank cutting mechanism in the steamed bun blank forming device includes a driving frame. On the driving frame, two cutting knife assemblies for front-back clamping are provided. The cutting knife assembly includes a knife plate, and the inner side surface of the knife plate is bent outward into an arc shape. It also includes a first pressing assembly, and the first pressing assembly includes a pressing block. The pressing block is arranged between the two knife plates, and the bottom surface of the pressing block is an upward-arching arc bottom surface. Since the inner side surface of the knife plate in this steamed bun blank cutting mechanism is bent outward into an arc shape, and a pressing block is arranged between the cutting knives on both sides, it can perform shaping on the cut steamed bun blank while cutting the dough strip connecting between the steamed bun blanks. In addition, since the cutting method of this steamed bun blank cutting mechanism is to cut through the cutting edge of the cutting knife, and at the same time, the driving frame drives the two cutting knife assemblies to clamp front and back, it can pull the dough strip toward the cutting knife side when the dough strip is being cut. Compared with simple cutting, this pulling cutting method makes the breakage of the dough strip more thorough.

[0017] 3. The steamed bun blank preliminary cutting gripper of the steamed bun blank forming device includes two relatively arranged gripper assemblies. The gripper assembly includes a cutting knife and a knife handle. The cutting knife is installed on the knife handle. The cutting knife includes a knife body part, and a vertical cutting edge part is provided on one side of the knife body part, and the side of the cutting edge part is the cutting edge. This steamed bun blank preliminary cutting gripper can transversely cut the dough strip connecting between adjacent steamed bun blanks by clamping, so that the dough strip connecting between adjacent steamed bun blanks will narrow and become thinner. Thus, when the thinner dough strip connecting between adjacent steamed bun blanks is completely cut by other components later, the cut is smaller, and the small cut is easier to shape, making the surface of the finally formed steamed bun blank smoother, and the skin of the steamed bun will not show scars or cracks or breakage when steamed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 It is a schematic three-dimensional structure diagram of an embodiment of the steamed bun blank forming device of the present invention.

[0019] Figure 2This is one of the three-dimensional structure diagrams of the bun blank shaping gripper in an embodiment of the bun blank forming device of the present invention.

[0020] Figure 3 This is the second three-dimensional structure diagram of the bun blank shaping gripper in an embodiment of the bun blank forming device of the present invention.

[0021] Figure 4 This is the three-dimensional structure diagram of the bun blank shaping gripper in an embodiment of the bun blank forming device of the present invention when the rotating disc is not installed.

[0022] Figure 5 This is one of the three-dimensional structure diagrams of the jaw assembly in the bun blank shaping gripper in an embodiment of the bun blank forming device of the present invention.

[0023] Figure 6 This is the second three-dimensional structure diagram of the jaw assembly in the bun blank shaping gripper in an embodiment of the bun blank forming device of the present invention.

[0024] Figure 7 This is the three-dimensional structure diagram of the initial cutting gripper for bun blanks in an embodiment of the bun blank forming device of the present invention.

[0025] Figure 8 This is the three-dimensional structure diagram of the gripper assembly of the initial cutting gripper for bun blanks in an embodiment of the bun blank forming device of the present invention.

[0026] Figure 9 This is the front view of the assembled cutting knife and the knife handle in an embodiment of the initial cutting gripper for bun blanks in an embodiment of the bun blank forming device of the present invention.

[0027] Figure 10 It is Figure 9 The A-A cross-sectional view of

[0028] Figure 11 This is the three-dimensional structure diagram of the cutting knife in an embodiment of the initial cutting gripper for bun blanks in an embodiment of the bun blank forming device of the present invention.

[0029] Figure 12 This is the three-dimensional structure diagram of the bun blank cutting mechanism in an embodiment of the bun blank forming device of the present invention.

[0030] Figure 13 This is one of the three-dimensional structure diagrams of the cutting knife assembly in the bun blank cutting mechanism in an embodiment of the bun blank forming device of the present invention.

[0031] Figure 14 This is the second three-dimensional structure diagram of the cutting knife assembly in the bun blank cutting mechanism in an embodiment of the bun blank forming device of the present invention.

[0032] Figure 15Schematic installation diagram of the second die pressing block assembly in the steamed bun blank cutting mechanism in an embodiment of the steamed bun blank forming device of the present invention.

[0033] Figure 16 Schematic three-dimensional structure diagram of the driving frame in the steamed bun blank cutting mechanism in an embodiment of the steamed bun blank forming device of the present invention.

[0034] In the figure, the reference numerals denote: Initial cutting gripper 100 for steamed bun blank, gripper assembly 1, vertical knife 11, knife body part 111, knife handle guiding hole 1111, spring hole 1112, knife edge part 112, extrusion knife edge 1121, knife handle 12, spring groove 121, first spring 13, bottom cover 14, first mounting block 15, second mounting block 16; Steamed bun blank cutting mechanism 200, driving frame 2, first cross arm 21, third guide rod 22, second cross arm 23, vertical shaft 231, rotating support shaft 24, connecting rod frame 25, connecting rod part 251, second swing rod 26, roller 261, sliding sleeve 27, cutter assembly 3, knife plate 31, guiding block 32, telescopic slider 33, sliding rod part 331, upper end cover 34, second spring 35, knife handle 36, second die pressing block assembly 4, second die pressing block 41, fourth guide rod 42, third spring 43; Steamed bun blank shaping gripper 300, support frame 6, first guide rod 61, second guide rod 62, support arm 63, support block 64, vertical shaft 65, jaw assembly 7, shaping clamping plate 71, guiding wheel 72, vertical rod 73, moving slider 74, cross bar part 75, clamping plate connecting rod 76, moving block 77, driving assembly 8, rotating disk 81, guiding groove 811, first swing rod 82, middle pressing plate 9; Forming machine frame 400, first longitudinal rod 401, second longitudinal rod 402, third longitudinal rod 403; Clamping roller 500, rear vertical extrusion block 600, front vertical extrusion block 700, rolling and rubbing mechanism 800, first die pressing block assembly 900. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In one embodiment, a steamed bun blank forming device is provided. This steamed bun blank forming device is used to shape a dough column into individual steamed bun blanks, such as Figure 1As shown in the figure, the steamed bun blank forming device includes a forming frame 400 at the top. The forming frame 400 is provided with a first longitudinal rod 401, a second longitudinal rod 402 and a third longitudinal rod 403. This steamed bun blank forming device is installed on a steamed bun machine. The first longitudinal rod 401 and the second longitudinal rod 402 can be driven by a power device on the steamed bun machine to move closer to or away from each other, and the third longitudinal rod 403 is fixedly installed on the frame of the steamed bun machine. On the forming frame 400, there are a breaking and shaping mechanism, a steamed bun blank cutting mechanism 200, and a rolling mechanism 800 from front to back. Among them, the breaking and shaping mechanism includes two pairs of pinch rollers 500 arranged at intervals, a front vertical extrusion block 700, and a rear vertical extrusion block 600. The breaking and shaping mechanism is used to initially break the dough column passing through the bottom of the steamed bun blank forming device into individual steamed bun blanks. The two pairs of pinch rollers 500 squeeze on both sides of the dough column, the front vertical extrusion block 700 squeezes on the top of the dough column, and the rear vertical extrusion block 600 further presses and cuts the top of the dough column to improve the separation degree between adjacent steamed bun blanks. On the forming frame 40, there are also multiple groups of first die pressing block assemblies 900 for shaping the top of the steamed bun blanks. The lower end of the first die pressing block assembly 900 is provided with a die pressing block with an arched bottom surface, and the die pressing block can elastically move up and down.

[0037] The rolling mechanism 800 is used to rub and combine the cut surfaces of the steamed bun blanks after cutting, so that no scars are left on the surface of the steamed bun blanks.

[0038] At the rear side of the rolling mechanism F on the forming frame, there is a steamed bun blank shaping gripper 300. As shown in Figures 2 - 6 the figure, the steamed bun blank shaping gripper 300 includes a support frame 6. The support frame 6 mainly plays a role in supporting other components. On the support frame 6, there are a first guide rod 61 and a second guide rod 62 arranged crosswise. The first guide rod 61 and the second guide rod 62 each include two cylindrical rods. On both sides of the first guide rod 61 and the second guide rod 62, there are respectively gripper assemblies 7. There are a total of four gripper assemblies 7. On the support frame 6, there is a driving assembly 8 for driving the corresponding gripper assemblies 7 to move along the first guide rod 61 or the second guide rod 62. The driving assembly 8 can synchronously drive the four gripper assemblies 7, so that the four gripper assemblies 7 make a closing or opening movement. When the four gripper assemblies 7 make a closing movement, they can clamp the steamed bun blank in the middle to shape the four corners of the steamed bun blank. Each gripper assembly 7 respectively includes a gripper bracket and a shaping clamping plate 71. The gripper bracket is slidably installed on the first guide rod 61 or the second guide rod 62, and the shaping clamping plate 71 is arranged at the bottom of the corresponding gripper bracket. The inner side surface of the shaping clamping plate 71 is an arc surface for shaping the corners of the steamed bun blank.

[0039] As shown in Figure 1 the figure, the usage method of this steamed bun blank shaping gripper is as follows: (1) Figure 1This is a schematic three-dimensional structure diagram of an embodiment of the steamed bun blank forming device of the present invention. A conveyor belt (not shown in the figure) is provided below the steamed bun blank forming device. The conveyor belt is used to convey the dough column for making steamed bun blanks forward. A support plate (not shown in the figure) driven by the driving mechanism of the steamed bun machine to move up and down is provided at the bottom of the conveyor belt. When the support plate moves upward, it jacks up the conveyor belt and the dough column on it to move upward, so that the dough column abuts against each shaping component of the steamed bun blank forming device, and finally the dough column forms individual steamed bun blanks. (2) When the dough column is conveyed by the conveyor belt to the position of the steamed bun blank shaping gripper, the dough column has been shaped into the initial shape of the steamed bun blank by multiple first die pressing block assemblies 900 and pinch rollers 500 in front, and the dough strip connecting adjacent steamed buns has been cut off by the front vertical pressing block 700, the rear vertical pressing block 600, and the steamed bun blank cutting mechanism, forming individual steamed bun blanks. The steamed bun blank shaping gripper is used to shape the four corners of each individual steamed bun blank. (3) When the conveyor belt conveys the steamed bun blank, since the conveyor belt is jacked up, the steamed bun blank will enter between the four jaw assemblies 7. At this time, the driving assembly 8 drives the four jaw assemblies 7 to close, so that the inner sides of the shaping clamping plates 71 of the four jaw assemblies 7 are respectively closely attached to the four corners of the steamed bun blank and are appropriately pressed, thereby shaping the four corners of the steamed bun blank and making the shaped steamed bun more beautiful.

[0040] The effect of the steamed bun blank shaping gripper is as follows: Since the steamed bun blank shaping gripper is provided with four jaw assemblies 7, each jaw assembly 7 is provided with a shaping clamping plate 71, and the inner side surface of the shaping clamping plate 71 is an arc surface. Therefore, it can be closed under the drive of the driving assembly 8 to perform the final shaping of the steamed bun blank, making the finally formed steamed bun blank more beautiful. And the steamed bun blank forming device performs the square-to-round forming without changing the temperature of the dough blank itself.

[0041] Furthermore, in another embodiment, as Figures 2 - 6 shown, the driving assembly 8 of the steamed bun blank shaping gripper includes a rotating disk 81 provided on the support frame 6. Four arc-shaped guide grooves 811 are provided on the rotating disk 81. The four arc-shaped guide grooves 811 are arranged in an array with the same included angle on the rotating disk 81. Guide wheels 72 are respectively provided on each jaw support. A ring groove that is stuck on the rotating disk 81 is provided in the middle of the outer circumference of the guide wheel 72. The guide wheel 72 is correspondingly arranged in the guide groove 811. The driving assembly 8 further includes a first swing rod 82 connected to the rotating disk 81. The first swing rod 82 is used to drive the rotating disk 81 to rotate back and forth.

[0042] The working principle of the steamed bun blank shaping gripper is as follows: Combining Figure 1As shown, the support frame 6 of the bun blank shaping gripper is fixedly installed on the third longitudinal rod 403 of the entire bun blank forming device. There is a power component on the bun machine that can drive the first swing rod 82 to swing back and forth within a certain angle. When the first swing rod 82 swings back and forth, the first swing rod drives the rotating disk 81 to rotate back and forth. For example, in Figure 1 when the rotating disk 81 rotates clockwise, the outer edge of the guiding groove 811 can drive the guiding wheel 72 to move inward along the corresponding guide rod to achieve the closing action. When the rotating disk 81 rotates counterclockwise, the inner edge of the guiding groove 811 can drive the guiding wheel 72 to move outward along the corresponding guide rod to achieve the opening action. In this way, the rotating disk 81 can drive the four jaw assemblies 7 to act synchronously.

[0043] Furthermore, in another embodiment, as Figures 1 - 6 shown, the jaw support of the bun blank shaping gripper includes a vertical rod 73. At the top of the vertical rod 73, there is a moving slider 74 corresponding to the first guide rod 61 or the second guide rod 62. A sliding sleeve mounting hole is provided in the moving slider 74, and the first guide rod 61 or the second guide rod 62 is assembled by installing a sliding sleeve. At the bottom of the vertical rod 73, there is a crossbar portion 75. At the rear side of the shaping clamping plate 71, there is a clamping plate connecting rod 76 that intersects with the crossbar portion 75. The crossbar portion 75 and the clamping plate connecting rod 76 are vertically crossed. The clamping plate connecting rod 76 is connected to the crossbar portion 75 through an adjustable connecting component. Here, the adjustable connecting component can be a screw, so that the installation position of the clamping plate connecting rod 76 on the crossbar portion 75 can be adjusted, thereby adjusting the installation position of the shaping clamping plate 71. By adjusting the installation position of the shaping clamping plate 71, the shaping part and the extrusion force on the bun blank can be changed.

[0044] Furthermore, in another embodiment, as Figures 2 - 6 shown, the bun blank shaping gripper is provided with a first adjustment groove in the crossbar portion 75. A moving block 77 is provided in the first adjustment groove. A second adjustment groove is provided in the clamping plate connecting rod 76. The adjustable connecting component passes through the second adjustment groove and is connected to the moving block 77. The moving block 77 can move along the first adjustment groove. A screw hole is provided at the bottom of the moving block 77, and the adjustable connecting component is a screw screwed on the moving block 77.

[0045] Furthermore, in another embodiment, as Figures 2 - 6 shown, the first guide rod 61 and the second guide rod 62 of the bun blank shaping gripper are vertically crossed, and this crossing angle is more suitable for shaping the four corners of the bun blank.

[0046] Furthermore, in another embodiment, as Figures 2 - 6As shown, the support frame 6 of the steamed bun blank shaping clamp includes a support arm 63, and the support arm 63 is used to be installed on the frame of the steamed bun machine where the steamed bun blank shaping clamp is located. A support block 64 is provided on the support arm 63, and holes corresponding to the first guide rod 61 and the second guide rod 62 are provided on the support block 64. The first guide rod 61 and the second guide rod 62 are fixedly arranged on the support block 64, and a vertical shaft 65 is also provided in the middle of the support block 64. The vertical shaft 65 cannot rotate, and the rotating disk 81 is assembled on the vertical shaft 65 through a bearing.

[0047] Further, in another embodiment, Figures 2 - 6 As shown, the steamed bun blank shaping clamp is also provided with a middle pressure plate 9 at the bottom of the support frame 6. The middle pressure plate 9 is fixed to the bottom of the vertical shaft 65. The middle pressure plate 9 is located between the four clamping jaw assemblies 7. The top surface of the steamed bun blank is slightly pressed and shaped by the middle pressure plate 9, which further makes the steamed bun blank more beautiful.

[0048] Further, such as Figure 1 and Figures 7 - 10 As shown, a steamed bun blank initial cutting gripper 100 is provided between the pressing and shaping mechanism and the steamed bun blank cutting mechanism 200 on the forming machine frame 400. The steamed bun blank initial cutting gripper 100 includes two gripper assemblies 1 arranged opposite to each other. The two gripper assemblies 1 have the same structure and are arranged symmetrically on the left and right. Taking the gripper 1 on the left as an example, the gripper assembly 1 includes a vertical knife 11 and a knife handle 12. The vertical knife 11 is installed on the knife handle 12. The knife handle 12 is a vertical rod. A first spring 13 is provided between the vertical knife 11 and the knife handle 12, so that the vertical knife 11 can be extended and retracted up and down on the knife handle 12 when a force is applied. Specifically, when the vertical knife 11 is subjected to a force, the vertical knife 11 can be extended and retracted up and down on the knife handle 12. The knife 11 is able to move upward along the knife handle 12 after being subjected to upward resistance pressure, and the first spring 13 is compressed or extended. When the upward resistance pressure is released, the vertical knife 11 returns to its original position under the restoring force of the first spring 13. The vertical knife 11 includes a knife body 111. A vertical blade portion 112 is provided on one side of the knife body 111. The blade portion 112 is roughly a triangular prism, which gradually narrows from one side to the other side. The narrowest part of the side of the blade portion 112 is an extrusion blade 1121. The blades of the cutting knives of the two clamping hand assemblies 1 are clamped together to perform initial cutting on the connecting parts between adjacent steamed bun blanks.

[0049] Combination Figure 1 As shown in the figure, the steamed bun blank initial cutting clamp is used as follows: (1) Figure 1The frame 400 of the steamed bun blank forming device is provided with a first longitudinal rod 401 and a second longitudinal rod 402, and the two gripper assemblies 1 of the steamed bun blank initial cutting gripper are respectively installed on the first longitudinal rod 401 and the second longitudinal rod 402. The first longitudinal rod 401 and the second longitudinal rod 402 can be driven by the driving mechanism of the steamed bun blank forming device to move closer to or away from each other, thereby driving the two gripper assemblies 1 of the steamed bun blank initial cutting gripper to move closer to or away from each other. (2) When the dough column is transferred by the conveyor belt to the position of the initial cutting gripper of the steamed bun blank, the dough column has been shaped into the original shape of the steamed bun blank by the front vertical extrusion block 700, the two pairs of clamping rollers 500 and the rear vertical extrusion block 600. The front vertical extrusion block 700 is mainly used for vertical extrusion, and the bottom of the rear vertical extrusion block 600 is thinner and is used for vertical pressing and cutting. At this time, there are still dough strips connected between adjacent steamed bun blanks. When the two gripper assemblies 1 approach each other, the dough strips connected between adjacent steamed bun blanks can be further initially cut, so that the connected dough strips are narrowed, thinned or even disconnected (determined by the distance between the two gripper assemblies 1 when they approach each other), preparing for the subsequent complete cutting of the dough strips.

[0050] The advantages of the steamed bun blank initial cutting gripper are as follows: in the whole steamed bun blank forming device, the initial cutting component located before the steamed bun blank initial cutting gripper is the rear vertical extrusion block 600, and the rear vertical extrusion block 600 is used to longitudinally cut the dough bands connected between the steamed bun blanks shaped by the two pairs of clamping rollers 500 in front. The dough bands after longitudinal cutting by the rear vertical extrusion block 600 are wider. At this time, after being clamped and cross-cut by the steamed bun blank initial cutting gripper, the dough bands connected between adjacent steamed bun blanks will be narrowed and thinner, so that when the thinner dough bands connected between adjacent steamed bun blanks are completely cut off by other components later, the incision is smaller, and the small incision is easier to shape, so that the surface of the steamed bun blank formed in the end is smoother, and the steamed bun skin will not be damaged. Since the vertical knife 11 can be extended and retracted up and down on the knife handle 12 when subjected to force, the conveyor belt supported by the support plate at the bottom is in soft contact with the vertical knife 11, avoiding damage to the conveyor belt, and the conveyor belt moves more freely up and down.

[0051] Further, in another embodiment, Figures 10 - 11As shown, the steamed bun blank initial cutting gripper is provided with a handle guide hole 1111 matching the handle 12 in the knife body 111 of the vertical knife 11, the lower part of the handle 12 is arranged in the handle guide hole 1111, and a bottom cover 14 connected to the handle 12 is arranged at the bottom of the knife body 111, and the knife body 111 is supported by the bottom cover 14. A spring groove 121 is provided in the middle of the handle 12, and the first spring 13 is arranged in the spring groove 121. The upper middle area of ​​the handle guide hole 1111 is expanded to a spring hole 1112 matching the first spring 13, and the lower end of the first spring 13 is pressed against the step surface at the bottom of the spring hole 1112. When the vertical knife 11 is subjected to upward resistance pressure, the vertical knife 11 slides upward relative to the handle 12, and the first spring 13 is compressed. When the vertical knife 11 is no longer subjected to upward resistance pressure, the first spring 13 rebounds downward, so that the vertical knife 11 slides downward relative to the handle 12 and resets.

[0052] Further, in another embodiment, Figures 7 - 11 As shown, the lower end of the blade portion 112 of the steamed bun blank initial cutting gripper extends downward relative to the blade body 111, and the downward extension length of the blade body 111 depends on the distance that the vertical knife 11 moves upward relative to the knife handle 12, so as to ensure that the bottom cover 14 will not hit the bottom conveyor belt. Figures 7 - 9 As shown, the bottom surface of the blade portion 111 of the steamed bun blank initial cutting clamp is a plane, so that the bottom surface of the blade portion 111 is in surface contact with the bottom conveyor belt to avoid damage to the conveyor belt. Figures 7 - 8 As shown, the bottom cover 14 of the steamed bun blank initial cutting clamp is connected to the bottom surface of the handle 12 by screws. In other embodiments, the bottom cover 14 and the handle 12 can also be directly screwed.

[0053] Further, in another embodiment, Figures 7 - 8 As shown, the extrusion blade 1121 of the steamed bun blank initial cutting gripper is an arc-shaped blade. When the arc-shaped blunt blade contacts the dough strips connecting adjacent steamed bun blanks, no obvious indentation will be left on the dough strips, making the surface of the steamed bun blanks smooth.

[0054] Further, in another embodiment, Figures 7 - 8As shown, the clamping component 1 of the initial cutting of the steamed bun blank that pinches the hand further includes a first mounting block 15 and a second mounting block 16. The top of the knife handle 12 is mounted in the first mounting block 15, and the first mounting block 15 is mounted at the bottom of the second mounting block 16. Among them, a knife handle fixing hole is provided at the bottom of the first mounting block 15, and the top end of the knife handle 12 is mounted in the knife handle fixing hole, and then the knife handle is fixed by arranging a set screw on the side of the first mounting block. A transverse chute is provided at the bottom of the second mounting block 16, and a transverse protrusion matching the transverse chute is provided at the top of the first mounting block 15. Both the transverse chute and the transverse protrusion are in the shape of a dovetail, which can adjust the mounting position of the first mounting block 15 at the bottom of the second mounting block 16, so as to adjust the distance between the vertical knives 11 of the two clamping components 1. After the first mounting block 15 is installed, a screw is screwed into the side of the second mounting block 16 to clamp the transverse protrusion. A longitudinal chute is also provided at the top of the second mounting block 16. Combining Figure 1 As shown, slide rails are provided at the bottoms of the first longitudinal rod 401 and the second longitudinal rod 402, and the longitudinal chute matches the slide rails, so that the mounting position of the second mounting block 16 on the first longitudinal rod 401 (or the second longitudinal rod 402) can be adjusted, and then it is fixed by arranging a set screw on the side of the second mounting block.

[0055] In one embodiment, a steamed bun blank cutting mechanism is provided. As Figures 12 - 14 shown, the steamed bun blank cutting mechanism includes a driving frame 2. The driving frame 2 is driven by a forming frame 400 of the steamed bun blank forming device where the steamed bun blank cutting mechanism is located. Two cutting knife components 3 for front-back clamping are provided on the driving frame 2. The two cutting knife components 3 are arranged symmetrically front and back. The cutting knife component 3 includes a knife plate 31. The inner side surface of the knife plate 31 is bent outward into an arc shape, and the two sides of the steamed bun blank can be shaped through the arc-shaped inner side surface. A cutting edge is provided at the bottom of the knife plate 31. The cutting edge is thinned relative to the upper region of the knife plate 31, which is beneficial to cutting the dough strip connecting adjacent steamed bun blanks. The top of the knife plate 31 is mounted on the driving frame 2 through a knife plate holder. The driving frame 2 is used to drive the two cutting knife components 3 to approach or move away from each other in the clamping direction. By the movement mode of the cutting knife components 3 approaching or moving away from each other in the clamping direction, the dough strip connecting adjacent steamed bun blanks is cut, and the two sides of the cut steamed bun blanks are shaped.

[0056] The steamed bun blank cutting mechanism further includes a second pressing block assembly 4. The second pressing block assembly 4 includes a second pressing block 41 and a pressing bracket. The pressing bracket is used to support the second pressing block 41. The second pressing block 41 is installed on the pressing bracket. The pressing bracket can be assembled with the driving frame 2 as a whole and then installed on the steamed bun machine where the steamed bun blank cutting mechanism is located. The pressing bracket can also be installed separately on the steamed bun machine where the steamed bun blank cutting mechanism is located. The second pressing block 41 is arranged between two knife plates 31. The bottom of the second pressing block 41 is an upwardly arched arc-shaped bottom surface. By setting the second pressing block 41, when the two knife plates 31 squeeze the steamed bun blank back and forth, the second pressing block 41 can shape the top surface of the steamed bun blank from above.

[0057] Combined with Figure 1 As shown, the usage method of the steamed bun blank cutting mechanism is as follows: (1) When the dough column under the steamed bun blank forming device is conveyed by the conveyor belt to the position where the steamed bun blank cutting mechanism is located, the dough column has been shaped into the initial steamed bun blank shape by multiple first pressing block assemblies and two pairs of pinch rollers 500 in front, and the dough strip connecting adjacent steamed buns has been squeezed into a thin dough strip by the front vertical pressing block 700 and the rear vertical pressing block 600. The steamed bun blank cutting mechanism is used to cut the dough strip. Since the conveyor belt is lifted, the dough strip will contact and press against the cutting edge of the knife plate 31 in the right cutting knife assembly 3 of the steamed bun blank cutting mechanism, thereby cutting the dough strip. At the same time, the two cutting knife assemblies 3 of the steamed bun blank cutting mechanism will clamp against each other back and forth under the drive of the driving frame 2, further breaking the cut dough strip. The two cutting knife assemblies 3 clamping against each other back and forth can also shape the two sides of the cut steamed bun blank, while the second pressing block 41 shapes the top surface of the steamed bun blank from above.

[0058] The effects of the steamed bun blank cutting mechanism are as follows: Since the inner side surface of the knife plate in the steamed bun blank cutting mechanism is bent outward into an arc shape and a pressing block is provided between the cutting knives on both sides, the cut steamed bun blank can be shaped while cutting the dough strip connecting the steamed buns; in addition, since the cutting method of the steamed bun blank cutting mechanism is to cut through the cutting edge of the cutting knife and at the same time drive the two cutting knife assemblies 3 to clamp against each other back and forth by the driving frame 2, the dough strip can be pulled towards the cutting knife side when being cut. Compared with simple cutting, this pulling cutting method makes the dough strip break more thoroughly.

[0059] Furthermore, in another embodiment, as Figures 13 - 14As shown, the knife plate frame of the steamed bun blank cutting mechanism includes a guide block 32 and a telescopic slider 33. The telescopic slider 33 can slide up and down along the guide block 32, wherein a guide hole matching the telescopic slider 33 is provided in the guide block 32, and the upper part of the telescopic slider 33 is arranged in the guide hole. An upper end cover 34 connected to the telescopic slider 33 is provided on the top of the guide block 32. The upper end cover 34 is connected to the upper end of the telescopic slider 33 by screws to prevent the telescopic slider 33 from detaching from the guide block 32. A second spring 35 is also provided between the guide block 32 and the telescopic slider 33 to enable the telescopic slider 33 to reset. The top of the knife plate 31 is connected to the telescopic slider 33, and a knife handle 36 is provided on the top of the knife plate 31. The knife handle 36 is installed at the lower part of the telescopic slider 33.

[0060] The extension and retraction of the blade 31 in the steamed bun blank cutting mechanism is as follows: when the conveyor belt supported by the support plate at the bottom of the steamed bun machine where the steamed bun blank cutting mechanism is located contacts the blade 31, the conveyor belt can push the blade 31 upward, the telescopic slider 33 moves upward relative to the guide block 32, and the second spring 35 is compressed. After the steamed bun blank cutting mechanism completes the action of cutting the steamed bun blank, the conveyor belt supported by the support plate at the bottom drops, and the blade 31 is no longer subjected to the upward resistance force. Under the elastic action of the second spring 35, the blade 31 moves down and returns to its original position. Since the blade 31 can be extended and retracted up and down when subjected to force, the conveyor belt supported by the support plate at the bottom and the blade 31 are in soft contact, which avoids damage to the conveyor belt, and the conveyor belt moves up and down more freely.

[0061] Further, in another embodiment, Figures 13 - 14 As shown, the telescopic slider 33 in the steamed bun blank cutting mechanism is in an inverted T shape, which includes an upper slide rod portion 331, and the bottom of the slide rod portion 331 is a cross rod portion. A second spring 35 is provided on both sides of the slide rod portion 331 between the guide block 32 and the telescopic slider 33, and spring accommodating holes are respectively provided on the bottom surface of the guide block 32 and the top surface of the cross rod portion of the telescopic slider 33. The upper and lower ends of the second spring 35 are arranged in the corresponding spring accommodating holes. By arranging the second springs 35 on both sides, it is beneficial to improve the stability of the knife plate 31.

[0062] Further, in another embodiment, Figure 12 and Figures 15 - 16As shown, the driving frame 2 of the steamed bun blank cutting mechanism includes a first cross arm 21, and the first cross arm 21 is used to be fixed on the frame of the steamed bun machine where the steamed bun blank cutting mechanism is located. On the first cross arm 21, there are third guide rods 22 in the front-rear direction. The third guide rods 22 are cylindrical guide rods, and there are two of them. On the third guide rods 22, second cross arms 23 are respectively arranged on both sides of the first cross arm 21. The second cross arms 23 are sleeved on the third guide rods 22. End caps are provided at the ends of the third guide rods 22 to prevent the second cross arms 23 from falling off. The knife plate holder is installed on the second cross arms 23, and the second cross arms 23 can slide left and right along the third guide rods 22, so as to drive the two cutter assemblies 3 to clamp front and back. In addition, a return spring (not shown in the figure) is arranged on the third guide rods 22 in the area between the two second cross arms 23 for resetting after the two cutter assemblies 3 clamp front and back. A rotating support shaft 24 is also arranged on the first cross arm 21. The rotating support shaft 24 mainly plays a supporting role. A rotatable connecting rod frame 25 is arranged on the rotating support shaft 24. The connecting rod frame 25 is installed on the rotating support shaft 24 through a bearing, so that the connecting rod frame 25 can rotate. Vertical shafts 231 are respectively arranged on the second cross arms 23 on both sides. The connecting rod frame 25 has connecting rod parts 251 on both sides. A shaft hole is provided at the end of the connecting rod part 251, so that the end of the connecting rod part 251 is rotatably connected to the vertical shaft 231. The driving frame 2 further includes a second swing rod 26 for driving the connecting rod frame 25 to swing. A roller 261 is provided on the upper side of the end of the second swing rod 26. The second swing rod 26 is firmly connected to the connecting rod frame 25, and when the second swing rod 26 swings, it can drive the connecting rod frame 25 to swing.

[0063] The working mode of the driving frame 2 of the steamed bun blank cutting mechanism is as follows: Combining Figure 1 shown, Figure 1 is the structural schematic diagram of the steamed bun blank forming device, Figure 1 in the forming frame 400 of the steamed bun blank forming device in

[0064] Figure 12 Figure 12 andFigure 15 As shown, the molded support of the steamed bun blank cutting mechanism includes a fourth guide rod 42 which is movable up and down and is arranged at one end of the outer side of the first cross arm 21. Two fourth guide rods 42 are arranged in parallel. A hole corresponding to the fourth guide rod 42 is arranged on the first cross arm 21, and an end cover connected to the top of the first guide rod is arranged on the top of the first cross arm 21. The second molded block 41 is arranged at the bottom of the fourth guide rod 42, and a third spring 43 is sleeved on the fourth guide rod 42. The third spring 43 is clamped between the second molded block 41 and the bottom surface of the first cross arm 21.

[0065] When the steamed bun blanks on the conveyor belt supported by the support plate at the bottom of the steamed bun machine where the steamed bun blank cutting mechanism is located come into contact with the bottom surface of the second mold block 41, the steamed bun blanks can push the second mold block 41 upwards, and the second mold block 41 moves upwards together with the fourth guide rod 42, and the third spring 43 is compressed. After the steamed bun blank cutting mechanism completes the action of cutting the steamed bun blanks, the conveyor belt supported by the support plate at the bottom descends, and the second mold block 41 is no longer subjected to the upward resistance force. Under the elastic action of the third spring 43, the second mold block 41 moves down and returns to its original position. Since the second mold block 41 can stretch up and down when subjected to force, the second mold block 41 on the conveyor belt supported by the support plate at the bottom is in soft contact, and the second mold block 41 can adaptively shape the top surface of the steamed bun blank to prevent the steamed bun blank from being flattened, and the conveyor belt can move up and down more freely.

[0066] Further, in another embodiment, Figure 15 As shown, the two side surfaces of the second molded block 41 of the steamed bun blank cutting mechanism are arc-shaped surfaces matching the inner side surfaces of the knife plate 31. When the two cutting knife assemblies 3 approach each other along the clamping direction, the inner side surfaces of the knife plate 31 match the outer side surfaces of the second molded block 41, so that the cavity formed between the knife plates 31 on both sides and the second molded block 41 on the top is relatively regular, and there is no gap between the inner side surfaces of the knife plate 31 and the outer side surfaces of the second molded block 41, which can better shape the steamed bun blank and prevent the two sides of the steamed bun blank from being squeezed and deformed.

[0067] Further, in another embodiment, Figure 12 and Figures 15 - 16 As shown, the second cross arm 23 of the steamed bun blank cutting mechanism is provided with a sliding sleeve 27 matching the third guide rod 22 . The provision of the sliding sleeve 27 facilitates the second cross arm 23 to slide smoothly on the third guide rod 22 .

[0068] In addition, combined Figure 1 As shown, each first molding block assembly 900 is staggeredly arranged between the clamping roller 500, the front vertical extrusion block 700, the rear vertical extrusion block 600, the steamed bun blank initial cutting clamp 100, the steamed bun blank cutting mechanism 200, and the rubbing roller mechanism 800. For example, Figure 12As shown in the figure, first pressing components 900 are respectively provided on the front and rear sides of the steamed bun blank cutting mechanism 200. The first pressing components 900 are respectively arranged on the front and rear sides of the two cutter components 3. The first pressing component 900 includes a first pressing block at the bottom and a second pressing support at the upper part. The bottom of the first pressing block is an upwardly arched arc-shaped bottom surface. Here, the first pressing component 900 is similar in structure to the previous second pressing block component 4, and its structure will not be described in detail here. By respectively arranging the first pressing components 900 on the front and rear sides of the steamed bun blank cutting mechanism 200, the purpose is to hold the adjacent steamed bun blanks on both sides of the steamed bun blank below the steamed bun blank cutting mechanism when the steamed bun blank cutting mechanism works, prevent the steamed bun blanks on both sides from being pulled and displaced during the operation of the steamed bun blank cutting mechanism, and at the same time also has the function of shaping the top surface of the steamed bun blank.

[0069] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0070] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steamed bun blank forming device, comprising a forming frame, on which a pressing and shaping mechanism, a steamed bun blank cutting mechanism, and a rolling mechanism are arranged from front to back, and a plurality of first molding block assemblies for shaping the top of the steamed bun blank are also arranged on the forming frame, characterized in that: A steamed bun blank shaping clamp is provided on the forming machine frame at the rear side of the rubbing roller mechanism, and the steamed bun blank shaping clamp includes a support frame, and a first guide rod and a second guide rod are arranged crosswise on the support frame, and jaw assemblies are respectively provided on both sides of the first guide rod and the second guide rod, and a driving assembly for driving the jaw assemblies to move along the first guide rod or the second guide rod accordingly is provided on the support frame, so that the four jaw assemblies can perform a retracting or opening action; each of the jaw assemblies includes a jaw bracket and a shaping splint, and the shaping splint is arranged at the bottom of the jaw bracket, and the inner side surface of the shaping splint is an arc surface.

2. The steamed bun blank forming device according to claim 1, characterized in that: The driving assembly includes a rotating disk arranged on the supporting frame, the rotating disk is provided with four arc-shaped guide grooves, each of the clamping jaw brackets is provided with a guide wheel, and the guide wheel is correspondingly arranged in the guide groove. The driving assembly also includes a first swing rod connected to the rotating disk, and the first swing rod is used to drive the rotating disk to rotate back and forth.

3. The steamed bun blank forming device according to claim 1, characterized in that: The clamping jaw bracket includes a vertical pole, a movable slider corresponding to the first guide rod or the second guide rod is provided on the top of the vertical pole, a cross bar is provided at the bottom of the vertical pole, a clamping plate connecting rod crossing the cross bar is provided on the rear side of the shaping clamping plate, and the clamping plate connecting rod is connected to the cross bar through an adjustable connecting component; a middle pressure plate is also provided at the bottom of the support frame, and the middle pressure plate is located between the four clamping jaw assemblies.

4. The steamed bun blank forming device according to claim 1, characterized in that: A steamed bun blank initial cutting gripper is also provided on the forming machine frame between the pressing and shaping mechanism and the steamed bun blank cutting mechanism. The steamed bun blank initial cutting gripper includes two relatively arranged gripper assemblies. The gripper assembly includes a vertical knife and a knife handle. The vertical knife is installed on the knife handle, and a first spring is provided between the vertical knife and the knife handle so that the vertical knife can be extended and retracted up and down on the knife handle when force is applied. The vertical knife includes a knife body portion, a vertical blade portion is provided on one side of the knife body portion, and an extrusion blade portion is provided on the side of the blade portion.

5. The steamed bun blank forming device according to claim 4, characterized in that: A handle guide hole matching the handle is provided in the knife body of the vertical knife, the lower part of the handle is arranged in the handle guide hole, and a bottom cover connected to the handle is provided at the bottom of the knife body; a spring groove is provided on the handle, the first spring is arranged in the spring groove, and the middle of the upper part of the handle guide hole is expanded to be a spring hole matching the first spring.

6. The steamed bun blank forming device according to claim 4, characterized in that: The lower end of the blade portion extends downward relative to the blade body portion; the bottom surface of the blade portion is a plane; and the extrusion blade is an arc-shaped blade.

7. The steamed bun blank forming device according to claim 1, characterized in that: The steamed bun blank cutting mechanism includes a driving frame, on which are arranged two knife plate assemblies for front and rear clamping, and the driving frame is used to drive the two knife plate assemblies to approach or move away from each other along the clamping direction, the knife plate assembly includes a knife plate, the inner side surface of the knife plate is bent outward into an arc, the bottom of the knife plate is provided with a cutting edge, and the top of the knife plate is installed on the driving frame through the knife plate frame; it also includes a second molded block assembly, the second molded block assembly includes a second molded block and a molded bracket, the two side surfaces of the second molded block are arc-shaped surfaces matching the inner side surfaces of the knife plate, the second molded block is installed on the molded bracket, the second molded block is arranged between the two knife plates, and the bottom of the second molded block is an upwardly arched arc-shaped bottom surface.

8. The steamed bun blank forming device according to claim 7, characterized in that: The knife plate frame includes a guide block and a telescopic slider, a guide hole matching the telescopic slider is provided in the guide block, the upper part of the telescopic slider is arranged in the guide hole, an upper end cover connected to the telescopic slider is provided on the top of the guide block, and a second spring is provided between the guide block and the telescopic slider; the top of the knife plate is connected to the telescopic slider.

9. The steamed bun blank forming device according to claim 7, characterized in that: The driving frame includes a first cross arm, a third guide rod in the front-rear direction is provided on the first cross arm, second cross arms are respectively provided on the third guide rod at both sides of the first cross arm, and the blade frame is installed on the second cross arm; a rotating support shaft is also provided on the first cross arm, a rotatable connecting rod frame is provided on the rotating support shaft, vertical shafts are respectively provided on the second cross arms on both sides, and the connecting rod frame has two connecting rod parts rotatably connected to the vertical shafts; the driving frame also includes a second swing rod for driving the connecting rod frame to swing; The molded bracket includes a fourth guide rod that is movable up and down and is arranged at one end of the first cross arm. The second molded block is arranged at the bottom of the fourth guide rod, and a third spring is sleeved on the fourth guide rod. The third spring is clamped between the second molded block and the first cross arm.

10. The steamed bun blank forming device according to claim 4, characterized in that: The pressing and shaping mechanism includes spaced-apart clamping rollers and vertical extrusion blocks, and the first molding block components are staggeredly arranged between the clamping rollers, vertical extrusion blocks, steamed bun blank initial cutting grippers, steamed bun blank cutting mechanism, and rubbing roller mechanism.

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