Rice crust forming device

Abstract

The utility model belongs to the technical field of food production, and particularly relates to a rice crust forming device which comprises a conveying unit, the conveying unit comprises a unit plate used for bearing materials, a heating unit is arranged beside the displacement path of the unit plate, and the unit plate sequentially passes through a material distribution section, a primary baking section, a shaping section and a secondary baking section after displacing and passing through the heating unit. When the device is used for producing the rice crust, the rice crust raw materials are distributed on the heated unit plates, so that the rice crust raw materials are heated during material distribution, and the production and processing efficiency of the rice crust can be improved. The shaping section is arranged between the two baking sections, so that the heated rice crust raw materials which are not coked are softer in texture and easy to shape, and shaping operation is facilitated; after shaping is completed, baking is continued, the posture after shaping can be maintained, the rice crust can be rapidly coked, hardened and shaped, and therefore forming processing of the rice crust is efficiently achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of food production, and particularly relates to a rice crust forming device. Background Art

[0002] The patent CN110024957A previously applied by the applicant discloses a method for preparing rice crusts. A steel conveyor belt is used to support and convey materials, and rotating rollers are arranged on the material conveying path to achieve material distribution and grinding. Then, the pre-treated materials are baked to obtain cooked rice crusts. The cooked rice crust sheets obtained by using this preparation device and method have distinct rice grains and a crispy taste. However, the connection between the internal cereal grains is weak, and the overall structure is loose, making the rice crust sheets prone to breakage, and the integrity of the rice crust sheets cannot be guaranteed after transportation. Content of the Utility Model

[0003] The purpose of the utility model is to provide a rice crust forming device, which can improve the integrity of the rice crust sheets after transportation while maintaining the crispy taste of the rice crusts during the forming process.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a rice crust forming device, including a conveying unit. The conveying unit includes a unit plate for supporting materials. A heating unit is arranged beside the displacement path of the unit plate. After the unit plate passes through the heating unit, it successively passes through a material distribution section, a primary baking section, a shaping section, and a secondary baking section.

[0005] Compared with the prior art, the utility model has the following technical effects: When this device is used to produce rice crusts, the rice crust raw materials are laid on the heated unit plate, so that the rice crust raw materials can be heated during material distribution, which can improve the production and processing efficiency of the rice crusts. The shaping section is arranged between the two baking sections. In this way, the rice crust raw materials that are heated and not yet charred are softer in texture and easier to shape, facilitating the shaping operation. After shaping, continuous baking can maintain its shaped posture and make it quickly char and harden and set, thus efficiently realizing the forming process of the rice crusts. Description of the Drawings

[0006] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0007] Figure 1 is the side view of the utility model;

[0008] Figure 2 is the schematic diagram of the grinding disc group and the unit plate from the top view of the shaping section;

[0009] Figure 3 is Figure 1 the sectional view taken along the line A-A in

[0010] Figure 4 isFigure 1 Schematic cross-sectional view taken along line B-B in Specific Embodiments

[0011] The following further elaborates on the specific embodiments of the present invention in detail with reference to the accompanying drawings and descriptions of the embodiments.

[0012] A rice cracker forming device includes a conveying unit 10. The conveying unit 10 includes a unit plate 11 for supporting materials. A heating unit 20 is provided beside the displacement path of the unit plate 11. After the unit plate 11 passes through the heating unit 20, it successively passes through a feeding section 10a, a primary baking section 10b, a shaping section 10c, and a secondary baking section 10d.

[0013] The unit plate 11 is preferably a plate body with good heat preservation performance. In this way, after the unit plate 11 is preheated for feeding, it can heat the rice cracker raw materials during feeding, and continuously heat the rice cracker raw materials throughout the conveying path, thereby accelerating the shaping of the rice crackers and improving the shaping processing efficiency. In this embodiment, the unit plate 11 is a food-grade metal plate with a plate thickness greater than 5 mm. The metal material has good structural strength and heat conduction performance, and can quickly transfer the heat energy of the heating unit 20 to the rice cracker raw materials while ensuring reliable support for the rice cracker raw materials. Increasing the plate thickness of the unit plate 11 can improve its heat preservation effect, so as to maintain the continuous heating state of the rice cracker raw materials when the unit plate 11 passes through the section without the heating unit 20, and avoid the decline in the quality of the finished rice crackers caused by processing the materials in an environment with large temperature difference fluctuations.

[0014] In this embodiment, the conveying unit 10 includes a driving wheel 12 and a driven wheel 13. The unit plate 11 is wound around the driving wheel 12 and the driven wheel 13 through a conveying chain 14. Driven by the driving wheel 12, the conveying chain 14 drives the unit plate 11 to rotate cyclically around the driving wheel 12 and the driven wheel 13. That is to say, in this embodiment, the unit plate 11 adopts chain transmission. In other embodiments, the unit plate 11 can also adopt other transmission methods such as slide rails.

[0015] Specifically as shown in the attached Figure 1 figures, the feeding section 10a, the primary baking section 10b, the shaping section 10c, and the secondary baking section 10d are located between the driving wheel 12 and the driven wheel 13. The rice cracker raw materials are conveyed and processed on the upper chain section of the conveying chain 14. At the end of the upper chain section of the conveying chain 14, the semi-finished rice crackers in the initial shape are transferred. Then, the unit plate 11 rotates around the driving wheel 12 and moves reversely on the lower chain section of the conveying chain 14 to the end of the lower chain section, and then rotates around the driven wheel 13 and moves to the feeding section 10a to support the rice cracker materials again. In this embodiment, the primary baking section 10b and the secondary baking section 10d of the conveying unit 10 are arranged in a heat preservation furnace 30, as shown in the attached Figure 4As shown, a heating unit 20 is provided below the displacement path of the unit plate 11 in the heat preservation furnace 30. In this way, the unit plate 11 supports the rice crust raw materials on the upper chain section of the conveying chain 14, and after being heated by the heating unit 20, it conducts heat energy to the rice crust raw materials; on the lower chain section of the conveying chain 14, the unit plate 11 is preheated by the heating unit 20 and then rotates to the upper chain section to support the rice crust raw materials with a high-temperature forming surface to achieve the required forming processing effect. The heating unit 20 can adopt common heating methods such as direct combustion and electrothermal heating, and the heating units 20 are arranged at equal intervals in the displacement forward direction of the unit plate 11. The heating unit 20 is arranged below the unit plate 11, so that the heating unit 20 heats the unit plate 11 and the raw material layer supported thereon from below the unit plate 11. On the one hand, the heat tends to diffuse upward, which can improve the utilization efficiency of heat, and on the other hand, it can further accelerate the hardening of the bottom layer of the raw material layer, while obtaining a hardened raw material layer bottom layer with distinct cereal grains, and improving the production efficiency of rice crust.

[0016] In this embodiment, the unit plate 11 is a rectangular plate. The plate length direction of the unit plate 11 is consistent with the wheel core direction of the driving wheel 12, the plate width direction is perpendicular to its plate length direction, the displacement direction of the unit plate 11 is perpendicular to its long plate edge direction, and the aforementioned chamfered surface is used to transitionally connect the long plate edge of the unit plate 11 and the bottom surface of the plate body. The plate width dimension of the unit plate 11 should not be too large, so as to prevent interference with adjacent components when the unit plate 11 rotates and displaces around the driving wheel 12 or the driven wheel 13. At the upper chain section of the conveying chain 14, the adjacent plate edge gaps of the adjacent unit plates 11 are in clearance fit to form a conveying plate group, which can avoid the rice crust raw materials from dripping or falling from the arrangement intervals of adjacent unit plates while realizing the continuous and stable processing of rice crust. Further, to facilitate the rotational displacement of the unit plate 11 at the driving wheel 12 and the driven wheel 13, the bottom surface of the adjacent plate edges of the adjacent unit plates 11 and the front / rear plate edges are transitionally connected by a chamfered surface, and the chamfered surface can be an inclined surface or a curved surface.

[0017] The conveying unit 10 includes two parallel and spaced-apart conveying chains 14, and the two side plate edges of the unit plate 11 arranged opposite to each other are respectively connected to the two conveying chains 14. That is, in this embodiment, the two short side edges of the unit plate 11 are respectively connected to the conveying chain 14, so that the two side plate edges of the unit plate 11 can be reliably supported. In this embodiment, the interval between the two conveying chains 11 is relatively large, that is, the plate length dimension of the unit plate 11 is relatively large. To reliably support the unit plate 11 to maintain its flat posture, a support wheel 111 is provided on the back of the unit plate 11. In the range of the primary baking section 10b and the secondary baking section 10d, a support seat 41 is provided on the frame 40 corresponding to the support wheel 111, and the support wheel 111 and the upper seat surface of the support seat 41 form a rolling fit. Specifically, as shown in the appendix Figure 4As shown in the figure, the supporting wheels 111 are arranged at the mid-positions of the two side plate edges where the unit plate 11 is connected to the conveying chain 14. In this way, support can be provided for the middle part and both sides of the unit plate 11 respectively, maintaining the processing attitude of the middle part and both sides of the unit plate 11 in the same horizontal plane. When the cloth-feeding or shaping element operates, a force will be exerted on the unit plate 11. To ensure the quality of the cloth-feeding or shaping operation, in this embodiment, within the ranges of the cloth-feeding section 10a and the shaping section 10c, support rollers 42 are provided at the bottom of the unit plate 11 on the chain section of the conveying chain 14, and the bottom surface of the unit plate 11 is in rolling fit with the support rollers 42. The length direction of the roller of the support roller 42 is parallel to the length direction of the unit plate 11, that is, the roller core of the support roller 42 is parallel to the roller core of the driving wheel 12. The layout range of the support rollers 42 should cover the length direction of the unit plate 11 as much as possible, so as to ensure the supporting effect on the plate body of the unit plate 11, and then maintain the plate body attitude of the unit plate 11, and ensure the processing effect of the cloth-feeding element and the shaping element on the rice crust raw material. In other embodiments, according to requirements, the supporting wheels 111 at the bottom of the unit plate 11 can also be omitted. In this way, within the ranges of the cloth-feeding section 10a and the shaping section 10c, a support roller 42 can be provided on the unit plate 11 to support the unit plate 11. When the supporting wheels 111 are provided at the bottom of the unit plate 11, two support rollers 42 can be symmetrically arranged on both sides of the supporting wheels 111 respectively. The roller core of the support 42 is perpendicular to the advancing direction of the conveying plate group and parallel to the bottom surface of the unit plate 11.

[0018] As shown in the attached Figure 1 figure, above the unit plate 11 in the range of the cloth-feeding section 10a, a cloth-feeding hopper (not shown in the figure) and a pressure roller 43 are successively arranged. The rice crust raw material falls from the bottom of the cloth-feeding hopper onto the unit plate 11, and then the material on the unit plate 11 is extruded by the pressure roller 43 and the unit plate 11 to form a layer / plate-like structure. Among them, the roller core of the pressure roller 43 is parallel to the driving wheel 12, that is, the upper plate surface of the unit plate 11, and the distance between the pressure roller 43 and the unit plate 11 is adjustable, so as to adjust the thickness of the rice crust raw material layer obtained by roller pressing.

[0019] As shown in the attached Figure 1 、 3As shown in the figure, a grinding disc 44 is provided above the unit board 11 within the shaping section 10c. The rotation axis core of the grinding disc 44 is perpendicular to the upper board surface of the unit board 11, and the grinding discs 44 are arranged at intervals to form a grinding disc group. In specific implementation, the unit board 11 supports the rice crust raw materials and makes a forward linear displacement along with the conveying chain 14. The rotation direction of the grinding disc 44 is arranged at an angle with the displacement direction of the unit board 11. The distance between the grinding disc 44 and the unit board 11 is smaller than the distance between the pressing roller 43 and the unit board 11, so that the soft rice crust raw materials are kneaded or scraped by the grinding disc 44, and then are compacted and shaped. Among them, the soft cereal grains are broken under the action of the grinding disc 44 and are baked at the secondary baking section 10d, so that the starch in the cereal grains can be fully gelatinized, thereby improving the taste of the finished rice crust. In order to enable the materials paved on the unit board 11 to be polished, the friction surface of the grinding disc group should cover the material paving area on the unit board 11. As shown in the appendix Figure 2 As shown in the figure, at least two rows of grinding discs 44a are arranged at intervals in the advancing direction of the unit board 10. The grinding discs 44 within each row of grinding discs 44a are arranged at intervals, and the rotation axis cores of the grinding discs 44 within the same row of grinding discs 44a are located in the same plane perpendicular to the conveying direction of the unit board 11. Further, the grinding discs 44 of two adjacent rows of grinding discs 44a are staggered in the direction perpendicular to the advancing direction of the unit board 11. In this way, the grinding surfaces of the grinding discs 44 of two adjacent rows of grinding discs 44a have overlapping and non-overlapping areas, which can ensure the full polishing of the materials.

[0020] In order to make the upper layer of the rice crust raw materials entering the shaping section 10c in a soft state, in this embodiment, as shown in the appendix Figure 4 As shown in the figure, a cover 31 is provided within the primary baking section 10b. The cover 31 is located above the unit board 11 and its cover opening faces the upper surface of the unit board 11. There is a gap between the cover opening of the cover 31 and the upper surface of the unit board 11, and the projection area of the cover 31 on the board surface of the unit board 11 covers the material paving area. Within the section of the primary baking section 10b, the heat is evenly transferred from the unit board 11 to the bottom of the materials paved on the unit board 11, and the cover 31 is provided above. In this way, most of the moisture transpired and discharged by the bottom layer of the materials due to heat can be retained, so as to maintain the soft state of the upper layer of the materials and ensure the shaping effect of the materials at the shaping section 10c.

[0021] Applying this embodiment for rice crust forming processing includes the following steps:

[0022] Step A: Spread the raw materials on the high-temperature forming surface to form a raw material layer. When the bottom surface of the raw material layer contacts the high-temperature forming surface, it immediately cokes and hardens. Among them, the raw materials for producing rice crust are cooked cereal grains, or a paste or paste made mainly of cooked cereals and mixed with water. The cereals can be granular food crops with high starch content such as rice, black rice, and buckwheat. Seasonings such as starch, soybean powder, sugar, and salt can also be added to the raw materials of the rice crust according to flavor characteristics. To ensure the shape of the rice crust, the weight percentage of the cereals is usually not less than 70%. Applying the high-temperature forming surface to spread the raw materials can improve the forming and hardening efficiency of the bottom layer of the rice crust while obtaining a bottom layer of the hardened raw material layer with distinct cereal grains. During the spreading operation, the cereal grains at the bottom layer of the raw material layer are subjected to less external force from spreading tools such as rollers, so that the integrity of their grains can be maintained. Then, they can be quickly dehydrated and hardened by the continuous heating of the high-temperature forming surface, so that they will not easily shift, and can maintain their complete grain shape and coke and harden to obtain a bottom layer of the hardened raw material layer with distinct cereal grains. This step is carried out at the cloth section 10a, where the heated unit plate 11 constitutes the high-temperature forming surface of the material. The temperature of the forming surface needs to be higher than 150°C. In this way, the coking and hardening speed of the bottom layer of the raw material layer can meet the processing requirements, that is, while the bottom layer of the raw material layer is hardened up to standard, the upper layer of the raw material layer still presents a soft state for the compaction processing of the upper layer of the raw material layer. In other embodiments, the temperature of the forming surface for supporting the spread raw materials can be adjusted according to factors such as raw material composition, raw material spreading thickness, forming surface material, and baking processing method.

[0023] Step B: Bake the raw material layer to harden its bottom layer and keep its upper layer in a soft state. The bottom of the raw material layer is directly in contact with the high-temperature forming surface and can quickly coke under the baking of the high-temperature forming surface to form a relatively hard bottom shell, so that the bottom layer of the rice crust is initially hardened and shaped. During the baking process, the water vapor transpired from the bottom layer volatilizes upward through the upper layer of the raw material layer, so that the hardening speed of the upper layer of the raw material layer far from the high-temperature forming surface is slower, and it can still maintain its soft state after the bottom layer of the raw material layer is hardened. This step is completed in the primary baking section 10b. In the preferred solution, conditions such as baking time and temperature need to be controlled to control the layer thickness of the hardened bottom layer and ensure that there are sufficient soft cereal grains above the hardened bottom layer.

[0024] Step C: Compress the upper layer in a soft state to obtain a raw material layer with a reduced layer thickness. Compression refers to using methods such as roll pressing, ramming, vibrating, and scraping to improve the density of the raw material layer. Compress the upper layer in a soft state when the bottom layer of the raw material layer is initially hardened and shaped. On the one hand, the initially hardened and shaped bottom layer still has a certain plasticity and is not easily broken when being extruded or polished. On the other hand, even if the initially hardened and shaped bottom layer cracks during the compression process, under the adhesion of the soft raw material in the upper layer, the continuous paving of the raw material layer on the forming surface can still be maintained, ensuring the integrity of the shape and contour of the finished rice cracker block. The compression component mainly acts on the upper layer in a soft state of the raw material layer and does not apply force to the hardened bottom layer of the raw material layer. During the compression operation, the soft cereal grains deform or break, and the deformed or broken cereal grains and slurry seep downward along the gaps between the hardened cereal grains at the bottom layer and fill the gaps. The slurry that rarely leaks to the high-temperature forming surface will immediately coke and harden. Since the cereal grains at the bottom layer of the raw material layer have been hardened as a whole in Step B and their shape and contour have been basically shaped, even if some slurry seeps downward, it will not confuse the contour boundaries of the cereal grains at the bottom layer of the raw material layer, maintaining the distinct appearance of the cereal grains at the bottom layer. After compression, the overall density of the raw material layer will be improved, and the upper surface of the raw material layer will also become smoother due to the compression operation. This step is completed in the shaping section 10c. After compression, the overall density of the raw material layer will be improved, and the roughness of the upper surface of the raw material layer will also be reduced due to the compression operation.

[0025] Step D: Bake the raw material layer to obtain a semi-finished rice cracker in a sheet-like and hardened form. After compressing the upper layer of the raw material layer, continue to bake the raw material layer until the upper layer of the raw material layer is also hardened, and then the formed semi-finished rice cracker is obtained. This step is completed in the secondary baking section 10d. In this section, there is no need to cover the material with a cover to accelerate the hardening and coking of the upper layer of the raw material layer. Baking is carried out immediately after the compression process, which can effectively promote the gelatinization of the starch contained in the broken cereal grains and thus improve the taste of the finished rice cracker.

Claims

1. A rice crust forming device, characterized in that: The conveying unit (10) comprises a unit plate (11) for supporting materials, a heating unit (20) is provided on the side of the displacement path of the unit plate (11), and after the unit plate (11) is displaced through the heating unit (20), it passes through a material distribution section (10a), a primary baking section (10b), a shaping section (10c) and a secondary baking section (10d) in sequence.

2. The rice crust forming device according to claim 1, characterized in that: The conveying unit (10) comprises a driving wheel (12) and a driven wheel (13); a material distribution section (10a), a primary baking section (10b), a shaping section (10c) and a secondary baking section (10d) are located between the driving wheel (12) and the driven wheel (13); a unit plate (11) is wound around the driving wheel (12) and the driven wheel (13) via a conveying chain (14); and the conveying chain (14) drives the unit plate (11) to rotate and displace around the driving wheel (12) and the driven wheel (13) under the drive of the driving wheel (12).

3. The rice crust forming device according to claim 2, characterized in that: The adjacent plate edges of the adjacently arranged unit plates (11) at the upper chain section of the conveyor chain (14) are matched with each other to form a conveyor plate group; the unit plates (11) are metal plates with a thickness greater than 5 mm; the unit plates (11) are rectangular plates, the plate length direction of the unit plates (11) is consistent with the wheel core direction of the driving wheel (12), and the plate width direction is perpendicular to the plate length direction.

4. The rice crust forming device according to claim 1, characterized in that: The primary baking section (10b) and the secondary baking section (10d) of the conveying unit (10) are arranged in a heat preservation furnace (30), and a heating unit (20) is arranged below the displacement path of the unit plate (11) in the heat preservation furnace (30).

5. The rice crust forming device according to claim 4, characterized in that: A cover (31) is provided in the primary baking section (10b), the cover (31) is located above the unit plate (11) and its cover opening faces the upper surface of the unit plate (11), a gap is arranged between the cover opening of the cover (31) and the upper surface of the unit plate (11), and a projection area of ​​the cover (31) on the surface of the unit plate (11) covers a material spreading area.

6. The rice crust forming device according to claim 1, characterized in that: A material distribution hopper and a pressure roller (43) are sequentially arranged above the unit plate (11) in the material distribution section (10a); the roller core of the pressure roller (43) is parallel to the driving wheel (12); and the distance between the pressure roller (43) and the unit plate (11) is adjustable.

7. The rice crust forming device according to claim 6, characterized in that: A grinding disc (44) is provided above the unit plate (11) in the shaping section (10c); the rotary axis of the grinding disc (44) is perpendicular to the upper plate surface of the unit plate (11); the grinding discs (44) are arranged at intervals to form a grinding disc group; the friction surface of the grinding disc group covers the material spreading area on the unit plate (11); and the spacing between the grinding disc (44) and the unit plate (11) is smaller than the spacing between the pressure roller (43) and the unit plate (11).

8. The rice crust forming device according to claim 2, characterized in that: The conveying unit (10) comprises two conveying chains (14) arranged in parallel and at intervals, and the two side plate edges of the unit plate (11) arranged opposite to each other are respectively connected to the two conveying chains (14).

9. The rice crust forming device according to claim 8, characterized in that: A supporting wheel (111) is provided on the back of the unit plate (11), and a supporting seat (41) is provided on the frame (40) corresponding to the supporting wheel (111), and the supporting wheel (111) and the upper seat surface of the supporting seat (41) form a rolling fit; the supporting wheel (111) is arranged at the middle position of the two side plate edges where the unit plate (11) is connected to the conveying chain (14).

10. The rice crust forming device according to claim 8 or 9, characterized in that: Within the range of the cloth section (10a) and the shaping section (10c), the bottom surface of the unit plate (11) at the upper chain section of the conveyor chain (14) forms a rolling fit with the support roller (42), and the roller core of the support roller (42) is parallel to the wheel core of the driving wheel (12); when a support wheel (111) is provided at the bottom of the unit plate (11), the two support rollers (42) are symmetrically arranged on both sides of the support wheel (111).

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