Grid mold for forming dried bean curds

Abstract

The invention discloses a grating mold for dried bean curd forming, and relates to the technical field of dried bean curd manufacturing. Comprising a forming grid set and a permeable bottom plate which are matched to form a compression forming cavity, the forming grid set comprises at least two grid fences which are nested in a sliding mode, the forming grid set enables the volume of the compression forming cavity to be reduced under the action of pressure, and the compression forming cavity is restored under the action of elastic force after the pressure disappears; a pressing cover plate fixed to the output end of the pneumatic pressure device is arranged over the permeable bottom plate. The volume of the pressing forming cavity is changed through the mutually-nested grating fences, so that bean curd jelly in the cavity is pressed, the grating fences are made of food-grade stainless steel instead of sponge molds which possibly generate harmful substances to food in the prior art, and therefore the food safety and quality are guaranteed; the compression ratio of the whole die can be conveniently improved by increasing the number of the grating fences, meanwhile, the movable grating fences and the transition grating fences move respectively, and the stability of the pressing process is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of dried bean curd production, in particular to a dried bean curd forming grid mould. Background Art

[0002] The traditional production model of dried tofu is to cut the whole sheet of white tofu into suitable small pieces, wrap them with gauze and stack them on a wooden board, then stack them layer by layer on a filter press, apply a certain amount of pressure, gradually filter out the water, and press the loose tofu into tofu slices and dried tofu with a tighter structure. There are two problems with this production model. First, this method is based on a lot of manual operations, which requires the employment of more staff and has high labor costs. In addition, the manual operation of cutting the embryos and wrapping them with gauze causes the dried tofu to have inconsistent finished sizes and thicknesses, which affects the quantitative packaging of the product and also affects the aesthetics of the product.

[0003] The Chinese patent with the patent publication number CN211185711 U mentions a frame arranged above the base and a mold that assists in shaping the dried tofu. The mold is a sponge mold, which includes a main body and a molding chamber for placing the tofu. It uses the compressibility and resilience of the sponge to change the space size of its molding chamber to complete the extrusion of the tofu. The porous structure of the sponge also facilitates the discharge of excess water in the tofu. However, although this method is simple and easy to use, it has health and safety risks. As a chemical fiber product, the sponge comes into contact with foods such as tofu, and it is difficult to ensure that toxic substances will not enter the finished dried tofu. On the other hand, the porous structure of the sponge also creates favorable conditions for the growth of bacteria. Some tofu juice penetrates into the porous structure and is difficult to clean thoroughly, which easily produces bacteria. To this end, we provide a grid mold for forming dried tofu. Summary of the invention

[0004] The purpose of the present invention is to provide a grid mold for forming dried bean curd, which has a simple structure, low production cost and is easy to market. The present invention eliminates the steps of making bean curd into tofu embryo and cutting the embryo and wrapping it with gauze, and has the obvious advantage of saving labor costs; the finished product has uniform size and thickness, which is convenient for quantitative packaging of the product.

[0005] The present invention can be implemented through the following technical scheme: a grid mold for forming dried tofu, including a forming grid group and a permeable bottom plate arranged at the bottom, the two cooperate to form a variable-volume pressing and molding cavity with a top opening, the forming grid group includes at least two grid enclosures that slide and nest with each other, the grid enclosures located at both ends are a fixed grid enclosure and a movable grid enclosure, the fixed grid enclosure is fixed to the permeable bottom plate, and the movable grid enclosure can move up and down in the vertical direction, the forming grid group reduces the volume of the pressing and molding cavity under the action of pressure, and returns to its original state under the action of elastic force after the pressure disappears; a pressing cover plate fixed to the output end of a pneumatic pressure device is arranged directly above the permeable bottom plate.

[0006] A further technical improvement of the present invention is that the elastic component for restoring the original shape of the formed grid group is an elastic support component or an annular air bag.

[0007] A further technical improvement of the present invention is that the elastic support assembly includes a support sleeve fixed to the water-permeable bottom plate, a telescopic rod is installed in the support sleeve through spring floating, and the telescopic rod drives the mobile grille enclosure to rebound.

[0008] A further technical improvement of the present invention is that when a transition grille enclosure is arranged between the fixed grille enclosure and the movable grille enclosure, during the pressing process, the movable grille enclosure and the transition grille enclosure move in turn relative to the fixed grille enclosure, and the bottom of the side walls of the transition grille enclosure and the movable grille enclosure are symmetrically installed with limit assemblies and limit release structures for controlling the sliding sequence.

[0009] A further technical improvement of the present invention is that the limit assembly includes a horizontally telescopic floating pin shaft, one end of the pin shaft is provided with a locking head, which cooperates with a locking hole on the side wall of the fixed grille enclosure, and the other end of the pin shaft is provided with an oblique groove;

[0010] The limit release structure comprises a roller rotatably arranged at the bottom of the movable grille enclosure, and the roller cooperates with an oblique groove on a corresponding pin shaft.

[0011] A further technical improvement of the present invention is that the bottom of the pressed cover plate contacts the movable grille enclosure or is directly fixed to the movable grille enclosure during pressing. When in free contact, the top of the pressed cover plate is set as a closed flat plate; when directly fixed, a clearance hole with a shape corresponding to the movable grille enclosure is opened on the top of the pressed cover plate.

[0012] A further technical improvement of the present invention is that the top of the pressed cover plate is arranged as a concave-convex surface, and the lower part of the concave surface is the position of the yield hole.

[0013] A further technical improvement of the present invention is that the water-permeable bottom plate includes two parts: a fixed plate and a movable mesh plate. The movable mesh plate is in close contact with the bottom of the fixed plate during pressing. After pressing is completed, the movable mesh plate carrying the pressed dried tofu is separated from the fixed plate.

[0014] A further technical improvement of the present invention is that it includes a device for unloading the grid mold, which includes two reciprocating movable frames, each of which is provided with a movable mesh plate that can slide up and down, and a support assembly for supporting the movable mesh plate to be close to its bottom is provided below the fixed plate, and the two movable frames move in turn to be directly above the support assembly.

[0015] A further technical improvement of the present invention is that the supporting assembly includes a positioning plate that can slide up and down and a horizontal sliding block that moves horizontally below the positioning plate, and the two are hinged by a connecting rod. When the supporting assembly supports the movable mesh plate upward, the connecting rod is in a dead point position.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention changes the volume of the pressing and molding cavity by nesting grille enclosures, thereby pressing the tofu curd in the cavity. The grille enclosures use food-grade stainless steel to replace the sponge molds in the prior art that may produce harmful substances to food, thereby ensuring food safety and quality;

[0018] 2. The present invention can conveniently improve the compression rate of the entire mold by increasing the number of grille enclosures, thereby producing dried bean curd products of different thicknesses; when there are multiple grille enclosures, the movable grille enclosure and the transition grille enclosure are respectively provided with a limit release structure and a limit assembly for cooperation, and the positioning of the transition grille enclosure is released only after the movable grille enclosure reaches a certain position, and the transition grille enclosure continues to move for compression, thereby ensuring the stability of the volume change of the pressing molding cavity during the pressing process and ensuring the pressing quality;

[0019] 3. The present invention uses a forming grid group, which is difficult to complete rapid discharge while ensuring the quality of the dried tofu due to the height. The permeable bottom plate is divided into a fixed plate and a permeable bottom plate. After pressing and forming, the permeable bottom plate carries the dried tofu and is separated from the fixed plate to achieve rapid discharge, further improve efficiency, save labor costs, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the basic structure of the grille mold of the present invention;

[0022] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure of the elastic support assembly of the present invention;

[0024] Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0025] Figure 5 It is a schematic cross-sectional structure diagram of the third embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of the coordination state of the limit assembly and the limit release structure according to the third embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the main structure of the fourth embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of a device for discharging materials in conjunction with Example 4 of the present invention;

[0029] Fig. 9 It is a schematic diagram of the connection structure of the support assembly of the discharging device in embodiment 4 of the present invention.

[0030] In the figure: 1, permeable bottom plate; 101, fixed plate; 102, movable mesh plate; 2, formed grille group; 201, fixed grille enclosure; 202, movable grille enclosure; 203, transition grille enclosure; 3, elastic support assembly; 301, support sleeve; 302, telescopic rod; 303, reset spring; 4, pressing cover plate; 5, annular airbag; 6, limit assembly; 7, limit release structure; 601, fixed seat; 602, pin shaft; 603, locking head; 604, locking spring; 605, inclined groove; 701, mounting seat; 702, roller; 81, support plate; 82, synchronous belt; 83, movable frame; 84, positioning plate; 85, sliding sleeve; 86, connecting rod; 87, horizontal slider; 88, telescopic cylinder. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0032] like Figure 1 As shown, a grille mold for forming dried bean curd comprises a forming grille group 2 which is nested with each other and can change its volume, and a water-permeable bottom plate 1 which is provided with water-permeable holes. The water-permeable bottom plate 1 cooperates with the forming grille group 2 to form a cavity structure with an open top, which is a pressing and forming cavity for the dried bean curd. After a certain amount of bean curd with brine is put into the pressing and forming cavity and a certain pressure is applied to the top of the forming grille group 2, the forming grille group 2 slides relatively, the volume of the pressing and forming cavity is reduced, and water is discharged from the water-permeable holes of the water-permeable bottom plate 1, and the bean curd is pressed into dried bean curd.

[0033] Wherein, the water-permeable bottom plate 1 and the formed grid group 2 are both made of food-grade stainless steel.

[0034] Embodiment 1

[0035] like Figures 2-3 As shown, a grille mold for forming dried tofu comprises a water-permeable bottom plate 1 and a plurality of forming grille groups 2 evenly arranged on the water-permeable bottom plate 1, each forming grille group 2 is composed of two sliding nested grille enclosures, which are marked as a fixed grille enclosure 201 and a movable grille enclosure 202 respectively;

[0036] Among them, the fixed grille enclosure 201 is fixed on the permeable bottom plate 1, and the side walls of the movable grille enclosure 202 are fixed with pole ears, and the bottom of each pole ear is provided with an elastic support component 3, and the elastic support component 3 includes a support sleeve 301 fixed to the permeable bottom plate 1, and a telescopic rod 302 is slidably provided on the top of the support sleeve 301. A return spring 303 is provided between the support sleeve 301 and the telescopic rod 302, and the two ends of the return spring 303 are respectively fixedly connected to the support sleeve 301 and the telescopic rod 302;

[0037] A pressing cover plate 4 is arranged directly above the permeable bottom plate 1. A pneumatic pressure device is arranged on the top of the pressing cover plate 4, which is generally a cylinder. The output end of the pneumatic pressure device is fixed to the pressing cover plate 4, so that the bottom of the pressing cover plate 4 applies pressure to the movable grille enclosure 202 to move it downward, thereby reducing the volume of the molding cavity and completing the pressing work; then the pressure of the pressing cover plate 4 on the movable grille enclosure 202 is released, and the movable grille enclosure 202 returns to its initial position under the elastic force of the return spring 303.

[0038] Embodiment 2

[0039] like Figure 4 As shown, an annular airbag 5 is provided on the outer side of the formed grille group 2 of the first embodiment, and the annular airbag 5 is used to replace the function of the elastic support component 3. A connecting flange is provided on the top edge of the movable grille enclosure 202, which is used to be fixed to the top of the annular airbag 5. During the downward movement of the movable grille enclosure 202, the annular airbag 5 is in a deflated state. When the pressing is completed, the pressure of the pressing cover plate 4 on the movable grille enclosure 202 is released, and air is inflated into the annular airbag 5 to return the movable grille enclosure 202 to its initial position.

[0040] Embodiment 3

[0041] In the above two embodiments, the maximum compression rate of the volume of the pressing and forming cavity formed by the forming grid group 2 and the permeable bottom plate 1 is 50%. At this time, the height of the movable grid enclosure 202 is the same as that of the fixed grid enclosure 201, and the two are completely flush in the height direction after compression; at this time, the dehydration amount and thickness of the dried bean curd have met the forming requirements of ordinary dried bean curd, but for some special dried bean curd products, the thickness requirement is much thinner than that of ordinary dried bean curd, and the firm taste will not be lost due to the thinness, so the compression rate needs to be further increased;

[0042] like Figures 5-6 As shown, the forming grille group 2 of this embodiment is composed of three grille enclosures, that is, a transition grille enclosure 203 is slidably nested between the fixed grille enclosure 201 and the movable grille enclosure 202, that is, the fixed grille enclosure 201 is sequentially nested with the transition grille enclosure 203 and the movable grille enclosure 202 from the inside to the outside. In other specific embodiments, the movable grille enclosure 202 can also be set as the innermost layer. The principle is the same and will not be repeated here;

[0043] In this embodiment, a limit release structure 7 is symmetrically installed at the bottom of the side wall of the movable grille enclosure 202, and a limit assembly 6 is set at the corresponding position of the bottom of the side wall of the transition grille enclosure 203; the limit assembly 6 cooperates with the limit release structure 7, so that in the process of the volume of the pressing and molding chamber becoming smaller, the movable grille enclosure 202 and the transition grille enclosure 203 move down in a time sequence, and when the movable grille enclosure 202 moves down to a certain position, the transition grille enclosure 203 moves down again, so that the volume change rate of the pressing and molding chamber is stable during the entire pressing process, which is conducive to the dehydration and molding of the tofu curd;

[0044] Specifically, the limiting assembly 6 includes a fixing seat 601 fixed to the bottom of the transition grille enclosure 203, a pin shaft 602 is slidably installed in the fixing seat 601, a locking spring 604 is sleeved on a section of the outer periphery of the pin shaft 602 located in the fixing seat 601, one end of the locking spring 604 abuts against the shoulder of the pin shaft 602, and the other end abuts against the fixing seat 601, and under the action of the elastic force, the pin shaft 602 tends to approach the fixed grille enclosure 201, a locking hole is provided at the corresponding position of the fixed grille enclosure 201, a locking head 603 is fixedly installed at one end of the pin shaft 602 close to the locking hole, and an inclined groove 605 is provided at the other end of the pin shaft 602;

[0045] The limit release structure 7 includes a mounting seat 701 fixedly mounted at the bottom of the movable grille enclosure 202, and a roller 702 is rotatably mounted at the bottom of the mounting seat 701. The roller 702 cooperates with the inclined groove 605 at the end of the pin shaft 602 to move the pin shaft 602 away from the locking hole, thereby releasing the matching relationship between the locking head 603 and the locking hole.

[0046] When the movable grille enclosure 202 is pressed and moves downward, the roller 702 has not yet contacted and matched with the inclined groove 605, and the locking head 603 maintains a matching relationship with the locking hole, so the transition grille enclosure 203 and the fixed grille enclosure 201 remain relatively still; when the movable grille enclosure 202 moves to a certain position, the roller 702 enters the inclined groove 605, so that the pin shaft 602 moves away from the locking hole, and the matching relationship between the locking head 603 and the locking hole is released. At this time, the transition grille enclosure 203 moves downward together with the movable grille enclosure 202 to continue to complete the pressing of the tofu curd;

[0047] After the pressing is completed, the movable grille enclosure 202 rebounds under the support of the elastic member and drives the transition grille enclosure 203 to rebound to the initial position for the next round of pressing.

[0048] Theoretically, more layers of grille enclosures can be nested in other specific embodiments, but the compression ratio of tofu pudding also has a certain limit and cannot be compressed indefinitely. The more layers of grille enclosures there are, the more complex the entire mold is, and the stability and precision will be reduced. Therefore, generally three layers of nesting are achieved, and the compression rate can reach more than 30%. Other layers of nesting will not be elaborated.

[0049] Embodiment 4

[0050] After the pressing is completed, the above three embodiments all need to manually take out the dried bean curd pieces in the grid mold. Due to the pressing, the height of the forming grid group 2 without pressure is higher than the thickness of the dried bean curd, which makes the taking out process not smooth and easily causes the dried bean curd to be damaged, thus affecting the quality. Therefore, this embodiment is further improved on the basis of the grid mold.

[0051] The movable grille enclosure 202 on the top of the forming grille group 2 is fixed to the pressing cover plate 4, and a corresponding shape of a clearance hole is opened at the corresponding position of the pressing cover plate 4. The top of the pressing cover plate 4 can be set to be a plane or as Figure 7 The concave-convex surface shown in the figure is provided with a clearance hole at the lower part of the concave surface, so that the tofu splashed or overflowed during the feeding or pressing process can smoothly flow into the clearance hole and enter the pressing and forming cavity, so as not to cause large-scale pollution or waste; of course, during pressing, the output end of the pneumatic pressure device is fixed to the pressing convex block whose position and depth match the clearance hole, so as to complete the pressing task;

[0052] The top of the elastic support assembly 3, which was originally connected to the movable grille enclosure 202, is now directly fixed to the pressing cover plate 4; the water-permeable bottom plate 1 is divided into two parts, the fixed plate 101 and the movable mesh plate 102, so that after the pressing is completed, the movable mesh plate 102 can be directly separated, and the pressed dried bean curd can be directly carried on the movable mesh plate 102, so as to facilitate the discharge;

[0053] like Figures 8-9 As shown, a device for unloading materials in cooperation with the grille mold comprises two symmetrically arranged support plates 81, two synchronous belts 82 driven by a motor and rotating synchronously are installed on the top of each symmetrical support plate 81, two moving frames 83 are arranged on the top of the two synchronous belts 82, the moving frames 83 move synchronously back and forth under the drive of the synchronous belts 82, and a moving mesh plate 102 that can move vertically directly above the moving frame 83 is arranged on the top of each moving frame 83 through a positioning pin;

[0054] A support assembly for supporting the mobile screen 102 is provided between the two support plates 81, and the support assembly includes a sliding sleeve 85 fixed between the two support plates 81 and a positioning plate 84 sliding up and down along the sliding sleeve 85, and one end of a connecting rod 86 is hinged at the bottom of the positioning plate 84, and the other end of the connecting rod 86 is rotatably connected to a horizontal sliding block 87 that slides horizontally, and the horizontal sliding block 87 is driven by a telescopic cylinder 88;

[0055] It should be noted that the two movable frames 83 stay in turn right above the positioning plate 84, and the fixed plate 101 and the forming grid group 2 are both fixedly arranged right above the positioning plate 84;

[0056] During the pressing process, the positioning plate 84 moves the connecting rod 86 to the dead point under the movement of the horizontal slider 87, and the positioning plate 84 lifts up the mobile mesh plate 102 located on the mobile frame 83, and makes the mobile mesh plate 102 close to the bottom of the fixed plate 101; after the pressing is completed, the positioning plate 84 moves down under the movement of the horizontal slider 87, so that the mobile mesh plate 102 comes into contact with the mobile frame 83 again, and the pressed dried tofu is also carried on the top of the mobile mesh plate 102, separated from the forming grid group 2, and then driven by the synchronous belt 82 to leave the fixed plate 101 until another mobile frame 83 carrying the empty mobile mesh plate 102 reaches the fixed plate 101 to continue the next round of pressing; the removed mobile mesh plate 102 completes the unloading of the dried tofu and the cleaning of the mesh plate, greatly improving the efficiency and the output quality.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A grid mold for forming dried tofu, characterized in that: The invention comprises a forming grille group (2) and a water-permeable bottom plate (1) arranged at the bottom, the two cooperate to form a variable-volume pressing and forming cavity with a top opening, the forming grille group (2) comprises at least two grille enclosures which are slidably nested with each other, the grille enclosures located at both ends are a fixed grille enclosure (201) and a movable grille enclosure (202), the fixed grille enclosure is fixed to the water-permeable bottom plate (1), and the movable grille enclosure (202) can move up and down in the vertical direction, the forming grille group (2) reduces the volume of the pressing and forming cavity under the action of pressure, and restores the cavity to its original state under the action of elastic force after the pressure disappears; a pressing cover plate (4) fixed to the output end of a pneumatic pressure device is arranged directly above the water-permeable bottom plate (1).

2. A grid mold for forming dried tofu according to claim 1, characterized in that: The elastic component for restoring the original shape of the forming grid group (2) is an elastic support component (3) or an annular air bag (5).

3. A grid mold for forming dried tofu according to claim 2, characterized in that: The elastic support assembly (3) comprises a support sleeve (301) fixed to the water-permeable bottom plate (1), a telescopic rod (302) is installed in the support sleeve (302) via a spring float, and the telescopic rod (302) drives the movable grille enclosure (202) to rebound.

4. The grill mold for forming dried tofu according to claim 1, characterized in that: When a transition grille enclosure (203) is provided between the fixed grille enclosure (201) and the movable grille enclosure (202), during the pressing process, the movable grille enclosure (202) and the transition grille enclosure (203) move in sequence relative to the fixed grille enclosure (201), and the bottoms of the side walls of the transition grille enclosure (203) and the movable grille enclosure (202) are symmetrically provided with a limit assembly (6) and a limit release structure (7) for controlling the sliding sequence.

5. The grille mold for forming dried tofu according to claim 4, characterized in that: The limit assembly (6) comprises a horizontally telescopic floating pin shaft (602), one end of the pin shaft (602) is provided with a locking head (603) which cooperates with a locking hole on the side wall of the fixed grille enclosure (201), and the other end of the pin shaft (602) is provided with an inclined groove (605); The limit release structure (7) comprises a roller (702) rotatably arranged at the bottom of the movable grille enclosure (202), and the roller (702) cooperates with the inclined groove (605) on the corresponding pin shaft (602).

6. The grid mold for forming dried tofu according to claim 1, characterized in that: The bottom of the pressing cover plate (4) contacts the movable grille enclosure (201) or is directly fixed to the movable grille enclosure (201) during pressing. When in free contact, the top of the pressing cover plate (4) is configured as a closed flat plate. When directly fixed, a clearance hole having a shape corresponding to the movable grille enclosure (201) is provided on the top of the pressing cover plate (4).

7. The grid mold for forming dried bean curd according to claim 6, characterized in that: The top of the pressed cover plate (4) is arranged as a concave-convex surface, and the lower part of the concave surface is the position of the yield hole.

8. The grill mold for forming dried tofu according to claim 6, characterized in that: The water-permeable bottom plate (1) comprises two parts, namely a fixed plate (101) and a movable mesh plate (102). The movable mesh plate (102) is in close contact with the bottom of the fixed plate (101) during pressing. After pressing is completed, the movable mesh plate (102) carrying the pressed dried bean curd is separated from the fixed plate (101).

9. The grid mold for forming dried bean curd according to claim 8, characterized in that: The invention comprises a device for unloading materials from the grid mold, the device comprising two reciprocating movable frames (83), each movable frame (83) being provided with a movable mesh plate (102) which can slide up and down, and a supporting assembly for supporting the movable mesh plate (102) to be close to the bottom of the fixed plate (101), and the two movable frames (83) being moved in turn to be directly above the supporting assembly.

10. The grid mold for forming dried bean curd according to claim 9, characterized in that: The support assembly comprises a positioning plate (84) that can slide up and down and a horizontal sliding block (87) that moves horizontally below the positioning plate (84), and the two are hingedly connected by a connecting rod (86). When the support assembly supports the movable mesh plate (102) upward, the connecting rod (86) is at a dead point position.

Images