A multi-cylinder dough sheet forming apparatus

Abstract

This utility model relates to the field of food processing machinery technology, specifically to a multi-roller dough sheet forming device, including a frame. A feeding conveyor belt is provided on one side of the frame. A first roller, a second roller, and a third roller are sequentially arranged on the frame along the direction of movement of the feeding conveyor belt. The first and second rollers are connected to the frame via a screw jack, while the third roller is fixed in a rotatable position connected to the frame. The second roller consists of eight parallel stainless steel rollers. Fixed seats are rotatably connected to both ends of each stainless steel roller, and the middle of the fixed seats is connected to the screw jack via a drive shaft. The second roller of this dough sheet forming device is composed of multiple freely rotatable stainless steel rollers. When the dough sheet passes through, the stainless steel rollers rotate without power due to the resistance of the dough sheet, forming a gradual rolling motion with the first and third rollers. This avoids strong pressure damaging the gluten network, achieving natural gluten extension through "pressureless rolling."

Description

Technical Field

[0001] This utility model relates to the field of food processing machinery technology, specifically to a multi-roller dough sheet forming device. Background Technology

[0002] Multi-roller dough sheet forming equipment is a food processing device that uses multiple sets of rollers to continuously roll and press dough, achieving uniform dough sheet thickness and stable structure. Its core function is to replace traditional manual folding and stretching or the strong pressure operations of simple equipment with the rolling and pressing between the rollers, thereby improving the efficiency and quality of dough sheet forming.

[0003] However, existing dough sheet forming equipment has the following significant drawbacks: First, manual dough rolling relies on the operator's experience to control the force, resulting in high time costs (requiring repeated folding and stretching), high labor intensity, large dough sheet thickness deviation (±1.5mm), low production capacity (<20kg / h), and inability to achieve continuous large-scale production. Second, simple rolling equipment uses single-pass high-pressure or high-frequency fast-pressure methods, which easily damages the original gluten network of the dough, causing shrinkage and deformation during baking. At the same time, high pressure squeezes out large air bubbles >2mm in the dough but destroys tiny air bubbles <0.5mm, reducing the fluffiness of the dough. In addition, simple equipment lacks continuous feeding and dynamic adjustment mechanisms, resulting in dough sheet rebound causing thickness errors and making large-scale continuous production impossible.

[0004] Therefore, there is an urgent need for a dough sheet forming device that combines pressureless rolling, retention of micro-air bubbles, and continuous production to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a dough sheet forming device based on multi-roller rolling, which replaces single-stage high pressure with multi-stage progressive rolling, achieving pressure-free dough sheet rolling, retention of micro-air bubbles, and continuous large-scale production, thereby improving dough sheet forming quality and production efficiency.

[0006] The technical solution provided by this utility model is a multi-roller dough sheet forming device, including a frame. A feeding conveyor belt is provided on one side of the frame. A first roller, a second roller, and a third roller are sequentially arranged on the frame along the direction of movement of the feeding conveyor belt. The first roller and the second roller are connected to the frame through a screw jack, and the third roller is in a fixed position and rotatably connected to the frame. The second roller is composed of at least six parallel stainless steel rollers. Fixed seats are rotatably connected to both ends of the stainless steel rollers, and the middle of the fixed seats is connected to the screw jack through a drive shaft.

[0007] In a preferred embodiment of the present invention, the first roller is located above the feeding conveyor belt, and the second and third rollers are both located at the ends of the feeding conveyor belt. The second roller is located above the feeding conveyor belt, and the third roller is located below the feeding conveyor belt, with the upper end of the third roller protruding from the upper surface of the feeding conveyor belt.

[0008] As a preferred embodiment of this utility model, the vertical distance between the first roller and the feeding conveyor belt is 5-15mm, and the vertical distance between the second roller and the third roller is 2-8mm.

[0009] As a preferred embodiment of this utility model, the two ends of the screw jack are respectively connected to a servo motor for driving and an adjustment plate for vertical guidance. The frame is provided with lifting guide rails on both sides of the adjustment plate. The centers of the first roller and the second roller are respectively rotatably connected to the adjustment plate of the corresponding screw jack.

[0010] As a preferred embodiment of this utility model, both the first roller and the third roller are made of stainless steel.

[0011] In a preferred embodiment of this invention, the stainless steel roller is rotatably connected to the fixed base via bearings and washers, and the transmission shaft is fixedly connected to the fixed base.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1. Pressureless rolling protects the gluten network: The second roller uses multiple freely rotating stainless steel rollers (at least six). When the dough passes through, the stainless steel rollers rotate without power due to the resistance of the dough, forming a gradual rolling with the first and third rollers. This avoids strong pressure damaging the gluten network and achieves the natural extension of gluten through "pressureless rolling".

[0014] 2. Preservation of micro-bubbles and improved fluffiness: The micro-gap rolling of multiple rollers (5-15mm between the first and second rollers, 2-8mm between the second and third rollers) only breaks up large air bubbles >2mm, while retaining micro-bubbles <0.5mm, maintaining the fluffy structure of the dough and avoiding the collapse problem caused by the strong pressure extrusion of air bubbles in simple equipment.

[0015] 3. Continuous production and increased capacity: By coordinating the control of the screw jack and servo motor, the roller spacing and height are adjusted, and the continuous feeding of the conveyor belt enables continuous rolling of dough (the capacity is significantly higher than that of manual rolling of dough, which is <20kg / h), solving the problem that simple equipment requires manual intervention and cannot produce continuously.

[0016] 4. Uniform and controllable thickness, reducing errors: The upper end of the third roller protrudes from the upper surface of the feeding conveyor belt, forming a bidirectional extrusion structure with the second roller; combined with the precise adjustment of the screw jack (servo motor driven), the thickness error of the sheet can be controlled within a smaller range, improving product consistency.

[0017] 5. Stable structure, suitable for large-scale production: The first and third rollers made of stainless steel and the second roller composed of multiple stainless steel rollers have good corrosion resistance and strength. Combined with the guiding and positioning of the lifting guide rail, it meets the needs of large-scale continuous production. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a multi-roller dough sheet forming device according to the present invention.

[0019] Figure 2 This is a side view of the frame of a multi-roller dough sheet forming device according to this utility model.

[0020] Figure 3 This is a schematic diagram of the roller movement direction of a multi-roller dough sheet forming device according to this utility model.

[0021] Figure 4 This is an exploded view of the second roller structure of a multi-roller dough sheet forming device according to this utility model.

[0022] As shown in the figure:

[0023] 1. Frame; 2. Feeding conveyor belt; 3. First roller; 4. Second roller; 5. Third roller; 6. Screw jack; 7. Stainless steel roller; 8. Fixed base; 9. Drive shaft; 10. Servo motor; 11. Adjusting plate; 12. Lifting guide rail; 13. Bearing; 14. Shim. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] As per the instruction manual Figure 1-4 As shown, a feeding conveyor belt 2 is fixedly installed on one side of the frame 1 for continuously conveying the dough to be rolled. Along the direction of movement of the feeding conveyor belt 2, a first roller 3, a second roller 4, and a third roller 5 are sequentially arranged on the frame 1.

[0028] In this invention, the first roller 3 is connected to the frame 1 via a screw jack 6 and is located above the feeding conveyor belt 2. It is used to pre-press the dough entering the initial section of the equipment. The first roller 3 can also be driven by a servo motor 10. The second roller 4 consists of several parallel stainless steel rollers 7. Each stainless steel roller 7 is rotatably connected to a fixed base 8 at both ends via bearings 13 and washers 14. A drive shaft 9 is fixed in the middle of the fixed base 8, and the drive shaft 9 is connected to the adjusting plate 11 of the screw jack 6 to adjust the height of the second roller 4. The third roller 5 is rotatably connected to the frame 1 at a fixed position and is located below the feeding conveyor belt 2. Its upper end protrudes from the upper surface of the feeding conveyor belt 2, forming a counter-rolling structure with the second roller 4.

[0029] In this invention, the drive end of the screw jack 6 is connected to a servo motor 10 for precise control of the lifting height of the rollers; an adjusting plate 11 is set at one end of the screw jack 6, and lifting guide rails 12 are installed on both sides of the frame 1 corresponding to the adjusting plate 11 to ensure the straightness and stability of the roller lifting process. The vertical distance between the first roller 3 and the feeding conveyor belt 2 is 5-15mm, and the vertical distance between the second roller 4 and the third roller 5 is 2-8mm. The specific distance can be adjusted according to the target thickness of the surface material.

[0030] In this invention, both the first roller 3 and the third roller 5 are made of food-grade stainless steel, which is highly corrosion-resistant and meets the hygiene requirements of food processing. A bearing 13 and a washer 14 are installed at the connection between the stainless steel roller 7 and the fixed base 8 to ensure rotational flexibility and reduce wear; the drive shaft 9 is fixedly connected to the fixed base 8 to ensure reliable power transmission.

[0031] During operation, the dough to be rolled is continuously fed into the equipment by the feeding conveyor belt 2. It first enters the gap between the first roller 3 and the feeding conveyor belt 2 (the initial gap is slightly larger than the target thickness). The first roller 3, driven by the servo motor 10 (or passively rotated), rotates synchronously with the direction of the dough's movement, pre-pressing uneven areas to eliminate large air bubbles and initially leveling the dough thickness to near the target range. Subsequently, the dough enters the opposing rolling area of ​​the second roller 4 and the third roller 5: the stainless steel roller 7 of the second roller 4 rotates without power due to the resistance of the dough, cooperating with the third roller 5 to progressively compress the middle dough. Due to the characteristic of non-powered rotation, the roller only passively rolls following the direction of the dough's movement, avoiding damage to the gluten network from strong pressure, while retaining tiny air bubbles through a micro-gap design. Finally, after two rolling processes, the dough thickness uniformity error is ≤ ±0.3mm, and the retention rate of tiny air bubbles is >90%, meeting the requirements for high-quality dough sheet forming.

[0032] Working principle

[0033] 1. Pre-pressing and leveling: The dough is fed into the first roller 3 by the feeding conveyor belt 2. The first roller 3 rotates synchronously to pre-press the uneven parts of the surface, eliminate large air bubbles and initially level the thickness of the dough to close to the target range (error ±1mm), laying the foundation for subsequent precision rolling.

[0034] 2. Pressureless Rolling: After pre-pressing, the dough enters the opposing rolling zone of the second roller 4 and the third roller 5. The second roller 4 consists of multiple freely rotating stainless steel rollers 7. When the dough passes through, the stainless steel rollers 7 rotate without power due to the resistance of the dough (similar to "passive tapping"), forming a bidirectional micro-pressure compression with the third roller 5. During this process, the rollers only roll in the direction of the dough's movement without any additional force applied, avoiding forced damage to the gluten network (gluten damage rate <10%). At the same time, only large air bubbles >2mm are broken, while small air bubbles <0.5mm (accounting for >90%) are retained, maintaining the fluffy structure of the dough.

[0035] 3. Precision Thickness Control: The upper end of the third roller 5 protrudes from the upper surface of the feeding conveyor belt 2, forming a fixed distance (2-8mm) with the second roller 4. Combined with the servo motor 10 of the screw jack 6, the thickness of the rolled dough can be precisely controlled (error ≤ ±0.3mm). Continuous feeding and the synchronous movement of multiple rollers ensure that the equipment can operate continuously for 24 hours, with a capacity ≥100kg / h, meeting the needs of large-scale production.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A multi-roller dough sheet forming device, comprising a frame (1), wherein a feeding conveyor belt (2) is provided on one side of the frame (1), characterized in that: The frame (1) is provided with a first roller (3), a second roller (4) and a third roller (5) in sequence along the direction of movement of the feeding conveyor belt (2). The first roller (3) and the second roller (4) are connected to the frame (1) through a screw jack (6), and the third roller (5) is in a fixed position and rotatably connected to the frame (1). The second roller (4) is composed of at least six parallel stainless steel rollers (7), and the two ends of the stainless steel rollers (7) are rotatably connected to fixed seats (8), and the middle of the fixed seats (8) is connected to the screw jack (6) through a transmission shaft (9).

2. The multi-roller dough sheet forming equipment according to claim 1, characterized in that: The first roller (3) is located above the feeding conveyor belt (2), the second roller (4) and the third roller (5) are both located at the end of the feeding conveyor belt (2), the second roller (4) is located above the feeding conveyor belt (2), the third roller (5) is located below the feeding conveyor belt (2), and the upper end of the third roller (5) protrudes from the upper surface of the feeding conveyor belt (2).

3. The multi-roller dough sheet forming equipment according to claim 2, characterized in that: The vertical distance between the first roller (3) and the feeding conveyor belt (2) is 5-15mm, and the vertical distance between the second roller (4) and the third roller (5) is 2-8mm.

4. The multi-roller dough sheet forming equipment according to claim 1, characterized in that: The screw jack (6) is connected to a servo motor (10) for driving and an adjustment plate (11) for guiding up and down at both ends. The frame (1) is provided with lifting guide rails (12) on both sides of the adjustment plate (11). The centers of the first roller (3) and the second roller (4) are rotatably connected to the adjustment plate (11) of the corresponding screw jack (6).

5. The multi-roller dough sheet forming equipment according to claim 1, characterized in that: Both the first roller (3) and the third roller (5) are made of stainless steel.

6. The multi-roller dough sheet forming equipment according to claim 1, characterized in that: The stainless steel roller (7) is rotatably connected to the fixed seat (8) via a bearing (13) and a washer (14), and the transmission shaft (9) is fixedly connected to the fixed seat (8).

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