Double-roller synchronous extrusion type hard candy forming machine

Abstract

The invention relates to the technical field of food processing equipment, in particular to a double-roller synchronous extrusion type hard candy forming machine. The forming machine comprises a driving roller and a forming roller, a center fixing cylinder is arranged in the forming roller, and the forming roller can circumferentially rotate relative to the center fixing cylinder; more than one group of forming boxes with different models are arranged on the central fixed cylinder along the circumferential direction, and a forming cavity with a corresponding model is formed in each forming box. A plurality of extrusion floating boxes are arranged on the periphery of the forming roller, the extrusion floating boxes are installed on the forming roller in a floating mode through elastic reset mechanisms, compression maintaining mechanisms are arranged in the extrusion floating boxes, and the extrusion floating boxes can seal the outer opening of the forming cavity and keep the syrup in the forming cavity in a continuous compression state under the extrusion effect. By means of the structure, multi-model fast switching, continuous pressing forming and stable cooling demolding in the hard candy forming process can be achieved, and the forming quality and the production efficiency are improved.

Description

Technical Field

[0001] This invention relates to a hard candy forming machine, specifically a double-roller synchronous extrusion hard candy forming machine. Background Technology

[0002] Hard candy, as a typical high-sugar food, typically involves multiple processes during its production, including syrup preparation, quantitative shaping, and cooling and solidification. Because hard candy syrup exhibits high viscosity, poor fluidity, a tendency to generate bubbles, and a tendency to deform during cooling at high temperatures, the structural design of the shaping equipment and the shaping method are subject to stringent requirements.

[0003] Among existing hard candy forming equipment, the most common methods include casting molding, single-mold compression molding, and two-roll extrusion molding. Among these, two-roll extrusion molding, due to its ability to achieve high efficiency and continuous production through the continuous rotation of the rollers, has been widely used in the large-scale manufacturing of hard candies. Existing two-roll extrusion hard candy forming machines typically employ a method of machining a fixed mold cavity on the outer surface of the forming rollers. Liquid or semi-liquid syrup is extruded and shaped within the mating area of ​​the two forming rollers as they rotate in opposite directions.

[0004] However, existing twin-roll extrusion hard candy forming equipment still has many shortcomings. First, the mold cavities on the existing forming rollers are usually fixed structures. When it is necessary to change to hard candy products of different shapes, sizes or specifications, it is often necessary to replace the entire forming roller or disassemble and replace the mold cavities one by one. This is not only complicated to operate and has high labor costs, but also has low replacement efficiency. It is difficult to meet the production needs of multiple varieties, small batches or rapid switching of product models. In some cases, multiple sets of forming equipment are even required to complete the production of different models of hard candy, resulting in high equipment investment costs.

[0005] Secondly, in the existing two-roll extrusion molding process, the molding state of the syrup in the mold cavity often depends on the instantaneous extrusion pressure. After the two rolls leave the mating area, the syrup is prone to internal bubbles, irregular edges, or surface defects due to residual internal gas, rebound, or changes in fluidity, affecting the molding quality. Especially before the syrup has fully cooled and solidified, it is difficult to maintain the compacted state of the syrup in the mold cavity, resulting in poor molding stability.

[0006] In addition, in existing technologies, the cooling process of hard candy is usually concentrated in a fixed cooling station or a single cooling structure. When production is continuous, heat is prone to accumulate in the cooling structure, which leads to a gradual decrease in cooling efficiency, thereby affecting the candy's shaping speed and overall production cycle, and thus limiting the molding efficiency.

[0007] Furthermore, existing twin-roll molding equipment typically requires additional ejection mechanisms, peeling mechanisms, or manual assistance devices in the demolding and unloading stages to separate the molded hard candy from the mold cavity. The overall structure is relatively complex, requires high assembly precision, and is prone to jamming, wear, or malfunctions during long-term operation, resulting in high maintenance costs.

[0008] In summary, existing double-roller extrusion hard candy forming equipment still suffers from problems such as complex structure, insufficient efficiency, and poor production flexibility in terms of mold switching efficiency, continuous compression and sealing of syrup during forming, stability of cooling efficiency, and automatic demolding and unloading of hard candy after forming. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a dual-roll synchronous extrusion hard candy forming machine, which effectively overcomes the shortcomings of existing technologies.

[0010] This invention is achieved through the following technical solution: a double-roller synchronous extrusion hard candy forming machine, comprising: The driving roller and the forming roller are driven to rotate by a driving mechanism, respectively; A central fixing cylinder is installed inside the forming roller, and the forming roller rotates circumferentially relative to the central fixing cylinder; A group of molding boxes of different models are arranged in a circular manner on the central fixed cylinder, and each group of molding boxes is provided with molding cavities of different models; The extrusion floating box is circumferentially floating on the forming roller. The forming roller is provided with a floating mounting groove. The extrusion floating box is floating in the floating mounting groove. A first elastic reset mechanism is provided between the extrusion floating box and each floating mounting groove. A clamping and retaining mechanism is provided in the movable cavity inside the extrusion floating box. Each clamping and retaining mechanism corresponds to a molding box. When the extrusion floating box is subjected to external pressure and moves towards the molding box, the clamping and retaining mechanism clamps and seals the external opening of the molding cavity. As the extrusion floating box continues to move, the molding box on the corresponding side snaps into the movable cavity. A second elastic reset mechanism is provided between the clamping and holding mechanism and the extrusion floating box, and the second elastic reset mechanism maintains the molding cavity in a constant clamping state. It also includes a material guiding mechanism, which is fixedly installed inside the central fixed cylinder. The central fixed cylinder has a material storage cavity, and the material storage cavity is connected to each of the forming cavities through a guide hole.

[0011] As a preferred technical solution, the extrusion floating box is made of metal material, and multiple semiconductor cooling chips are embedded in the extrusion floating box. The hot side of each semiconductor cooling chip is exposed on the outside of the forming cylinder, and its cold side is in contact with the extrusion floating box. When the forming box is snapped into the movable cavity, the extrusion floating box rapidly cools the snapped forming box.

[0012] As a preferred technical solution, the first elastic reset mechanism includes a first reset spring, the inner wall of the floating mounting groove is provided with an elastic reset groove, the squeezing floating box is provided with a first limiting baffle corresponding to the position of the elastic reset groove, the first reset spring is disposed in the elastic reset groove, one end of the first reset spring contacts the first limiting baffle, and the other end of the first reset spring contacts and supports one side end face of the elastic reset groove. When the squeezing floating box is subjected to external squeezing force and moves inward, it drives the first limiting baffle to squeeze the first reset spring, and causes the first reset spring to be elastically compressed.

[0013] As a preferred technical solution, the clamping and holding mechanism includes a sliding holding block, a magnetic traction plate, and a pressure sealing plate. The sliding holding block is slidably disposed in the movable cavity. A first connecting part is provided between the sliding holding block and the magnetic traction plate. The pressure sealing plate is fixedly connected to the magnetic traction plate through a second connecting part.

[0014] As a preferred technical solution, the cross-sectional area of ​​the pressure sealing plate is equal to the cross-sectional area of ​​each molding cavity, so that when the pressure sealing plate is snapped into the molding cavity, it can seal the outer opening of the molding cavity. The side of the pressure sealing plate facing the molding cavity is provided with an inclined guide surface, and the upper and lower surfaces of the magnetic traction plate correspond to the upper and lower surfaces of the molding box.

[0015] As a preferred technical solution, each of the molding boxes is provided with one or more "L"-shaped pull rods, and each pull rod end face is provided with a magnetic block. The magnetic pull plate is a magnetic plate that magnetically attracts the magnetic block on the pull rod, and the hard candy in the molding cavity is pulled out by the "L"-shaped pull rod.

[0016] As a preferred technical solution, the sliding retaining block has an "I" shaped cross section, and the second elastic reset mechanism is disposed between the sliding retaining block and the extrusion floating box. The second elastic reset mechanism includes a second limiting baffle and one or more second reset springs. One end of the second limiting baffle is fixedly connected to the extrusion floating box, one end of the second reset spring is fixedly connected to the second limiting baffle, and the other end of the second limiting baffle is fixedly supported by the sliding retaining block. When the pressure sealing plate seals the molding box, as the squeezing floating box continues to move inward, the sliding retaining block moves in the active cavity and squeezes the second return spring, so that the pressure sealing plate always keeps the liquid syrup in a compressed state during the molding process.

[0017] As a preferred technical solution, the material guiding mechanism includes a sealed box, a central support rod is fixedly installed at the center of the sealed box, the central support rod forms a mounting surface for each molding box, an electromagnet is fixedly installed on each mounting surface, a driving metal guide plate is provided on each mounting surface, a connecting spring is provided between the driving metal guide plate and the central support rod, one end of the connecting spring is fixedly connected to the driving metal guide plate, and the other end of the connecting spring is fixedly connected to the central support rod; The driving metal guide plate is provided with a guide sealing rod on the side opposite to the connecting spring. The guide sealing rod passes through the sealing box and is inserted into the guide hole and is flush with the bottom surface of the molding cavity. When the electromagnet on the corresponding side is energized, it attracts the driving metal guide plate and causes the guide sealing rod to separate from the guide hole, thereby making the storage cavity and the molding cavity connected. A feed pipe is connected to the outside of the central fixed cylinder. The input end of the feed pipe is fed with fluid syrup through a peristaltic pump. An electric heating device with a temperature control device is also installed inside the central fixed cylinder to maintain the fluidity of the fed syrup.

[0018] As a preferred technical solution, the outer circular surface of the drive roller is provided with one or more extrusion protrusions at equal intervals. When the extrusion protrusions contact the extrusion floating box, the extrusion floating box moves toward the inward forming box. The drive roller is rotatably supported on both sides by the first support base, the forming roller is rotatably supported on both sides by the second support base, and a bearing is installed in the middle. The drive roller is driven to rotate by the first drive mechanism, and the forming roller is driven to rotate by the second drive mechanism. The forming roller has conical dropping cavities on both sides that are inclined toward the second support seat. Both sides of the forming roller have dropping openings. A flexible buffer layer is laid in the conical dropping cavity to reduce the impact force of the hard candy dropping.

[0019] As a preferred technical solution, the two sides of the central fixing cylinder extend to the outside of the forming roller and are supported and fixed by an independently provided third support base. A rectangular mounting block is installed on each of the two extended ends of the central fixing cylinder. A torsion spring is installed between the central fixing cylinder and the rectangular mounting block. The outside of the rectangular mounting block is embedded in a rotating disk. The rotating disk is rotatably installed in the third support base. A locking screw is provided on the top of the third support base to lock the rotating disk.

[0020] The beneficial effects of this invention are as follows: By setting a central fixing cylinder inside the forming roller and arranging a group of more than one set of different types of forming boxes along the circumferential direction on the central fixing cylinder, the forming cavity is no longer fixedly machined on the forming roller body, thus structurally realizing the modularization and multi-specification integration of the forming cavity. When it is necessary to switch between different types and shapes of hard candy products, only the corresponding central fixing cylinder needs to be replaced or switched to complete the mold switching. There is no need to disassemble and assemble the mold cavity one by one, nor is it necessary to replace the entire forming roller or configure multiple sets of forming equipment, thereby significantly improving the mold switching efficiency, reducing the intensity of manual operation and equipment investment costs, and is especially suitable for multi-variety, flexible production scenarios. This invention provides a pressing and holding mechanism inside the extrusion floating box, and a second elastic reset mechanism continuously applies a pressing force to the pressure sealing plate, so that the syrup is always under pressure and sealed throughout the molding process in the molding cavity. This effectively reduces the backflow, rebound and internal gas residue of the syrup during the molding process, thereby reducing the generation of air bubbles inside the molded hard candy, improving the internal density of the candy, and making the molded hard candy more regular in shape and more stable in surface quality. This invention also incorporates a semiconductor cooling chip embedded within the extrusion floating box. When the forming box is snapped into the movable cavity, it can rapidly and directionally cool the syrup within the forming cavity. Because the extrusion floating box rotates with the forming roller and can continuously switch to participate in the forming process, compared to traditional centralized or single cooling methods, it can effectively avoid the problem of cooling capacity decreasing due to continuous operation, ensuring the stability of cooling efficiency, and improving forming cycle time and overall production efficiency. This invention, by setting a pull rod structure in the molding box that magnetically engages with the clamping and holding mechanism, enables the hard candy to be automatically separated and dropped from the molding cavity when molding is completed and the material is unloaded, without the need for additional ejection or peeling mechanisms. This reduces the number of demolding mechanisms, makes the overall structure more compact, reduces the complexity of the mechanism and the risk of failure, and improves the reliability and ease of maintenance of the equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a schematic diagram of the internal cross-section of the forming roller of the present invention; Figure 4 For the present invention Figure 3 A magnified view of a portion of point A in the middle; Figure 5 This is a schematic diagram of the clamping and retaining mechanism of the present invention; Figure 6 This is a schematic diagram of the structure of the molding box of the present invention; Figure 7 This is a schematic diagram of the material guiding mechanism of the present invention; Explanation of reference numerals in the attached figures: 1. Drive roller; 2. Forming roller; 20. Central fixed cylinder; 18. Forming box; 181. Forming cavity; 7. Extrusion floating box; 8. Floating mounting groove; 6. Pressing and holding mechanism; 5. Movable cavity; 17. Material guiding mechanism; 21. Material storage cavity; 182. Guide hole; 61. Sliding holding block; 64. Magnetic traction plate; 65. Pressure sealing plate; 66. First connecting part; 23. Pull rod; 62. Second limit stop plate; 63. Second return spring; 19. Sealing box; 171. Central support rod; 172. Electromagnet; 174. Drive metal guide plate; 173. Connecting spring; 22. Guide sealing rod; 4. Feed pipe; 3. Extrusion protrusion; 12. First support seat; 13. Second support seat; 11. First drive mechanism; 10. Second drive mechanism; 99. Conical discharge chamber; 13. Third support seat; 15. Rectangular mounting block; 16. Rotating disk; 9. Locking screw. Detailed Implementation

[0023] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0025] like Figure 1 and Figure 2 As shown, a dual-roll synchronous extrusion hard candy forming machine of the present invention includes a drive roller 1 and a forming roller 2, both of which are cylindrical in shape and arranged parallel to each other. The drive roller 1 and the forming roller 2 are driven to rotate by their respective drive mechanisms. The drive roller 1 is mainly used to provide periodic extrusion force to the forming roller 2, and the forming roller 2 is used to support the forming structure and complete the forming, cooling and demolding processes of the syrup.

[0026] The drive roller 1 and the forming roller 2 are rotatably supported on the equipment frame by support seats. The drive roller 1 is rotatably mounted on both sides by the first support seat 12, and the forming roller 2 is rotatably mounted on both sides by the second support seat 13. The rotation axes of the drive roller 1 and the forming roller 2 are kept parallel and low-friction rotation is achieved by bearings. Since the outer diameters of the drive roller 1 and the forming roller 2 are different, their drive speeds can be set to be different, but the extrusion drive action during the rotation process must be guaranteed.

[0027] The forming roller 2 has a hollow interior, and a central fixing cylinder 20 is coaxially mounted inside it. After installation, the central fixing cylinder 20 remains fixed relative to the overall equipment and does not rotate, while the forming roller 2 can rotate around the central fixing cylinder 20. This structure ensures that the internal structure of the forming roller 2 remains relatively stationary during rotation, facilitating the arrangement of the material guiding, forming, and control structures in the central area. Both ends of the central fixing cylinder 20 extend outside the forming roller 2 and are supported and fixed by an independently provided third support seat 13, thus ensuring the stability of the central fixing cylinder 20 during equipment operation.

[0028] One or more forming boxes 18 are evenly distributed along the circumferential direction on the outer circumferential surface of the central fixed cylinder 20. Each forming box 18 is fixedly mounted on the central fixed cylinder 20 and does not rotate with the forming roller 2. Different forming boxes 18 can be set to different models, and each forming box 18 forms a forming cavity 181 that matches the shape of the corresponding hard candy, so that the same machine can integrate multiple specifications of hard candy forming structures. When it is necessary to change the product model, the central fixed cylinder 20 can be replaced or its angle position adjusted so that different models of forming boxes 18 can participate in the forming process, thereby realizing the rapid switching of hard candy models.

[0029] Multiple floating mounting grooves 8 are provided along the circumferential direction on the outer circumferential surface of the forming roller 2, and an extrusion floating box 7 is floatingly mounted in each floating mounting groove 8. The outer side of the extrusion floating box 7 is positioned opposite to the extrusion protrusion 3 of the drive roller 1, and its inner side faces the corresponding forming box 18. The extrusion floating box 7 is not rigidly fixed to the forming roller 2, but achieves controllable radial floating through a first elastic reset mechanism.

[0030] Specifically, an elastic reset groove is formed on the inner wall of the floating mounting groove 8, the floating box 7 is squeezed to set a first limiting baffle at the corresponding position, and the first reset spring is set in the elastic reset groove, with one end abutting against the first limiting baffle and the other end abutting against the end face of the elastic reset groove.

[0031] When the squeezing floating box 7 is subjected to external squeezing force and moves inward, the first limit baffle compresses the first reset spring, causing the squeezing floating box 7 to produce elastic displacement. After the external squeezing force is released, the first reset spring resets and pushes the squeezing floating box 7 back to its initial position.

[0032] The extrusion floating box 7 has a movable cavity 5 inside, and a clamping and holding mechanism 6 is provided inside the movable cavity 5. Each clamping and holding mechanism 6 corresponds one-to-one with a forming box 18. Figure 5 As shown, the clamping and retaining mechanism 6 includes a sliding retaining block 61, a magnetic traction plate 64, and a pressure sealing plate 65. The sliding retaining block 61 can slide radially within the movable cavity 5. The sliding retaining block 61 is connected to the magnetic traction plate 64 via a first connecting part 66, and the magnetic traction plate 64 is then fixedly connected to the pressure sealing plate 65 via a second connecting part, forming an integrated linkage structure. The cross-sectional area of ​​the pressure sealing plate 65 matches the cross-sectional area of ​​the corresponding molding cavity 181. When the pressure sealing plate 65 enters the outer opening of the molding cavity 181, it can form a sealing cover on the outer opening of the molding cavity 181.

[0033] like Figures 3-5 As shown, a second elastic reset mechanism is provided between the squeezing floating box 7 and the sliding holding block 61. The second elastic reset mechanism includes a second limiting baffle 62 and one or more second reset springs 63.

[0034] One end of the second limiting baffle 62 is fixed to the extrusion floating box 7, and the other end forms a supporting relationship with the sliding retaining block 61. One end of the second return spring 63 is fixedly connected to the second limiting baffle 62, and the other end is fixedly connected to the sliding retaining block 61. When the extrusion floating box 7 moves inward, the sliding retaining block 61 moves accordingly in the movable cavity 5 and compresses the second return spring 63, so that the pressure sealing plate 65 always maintains a continuous pressing state on the molding cavity 181.

[0035] During equipment operation, when the forming roller 2 rotates to the corresponding position, the extrusion protrusion 3 on the outer circular surface of the drive roller 1 contacts the outer side of the extrusion floating box 7, and the extrusion protrusion 3 pushes the extrusion floating box 7 towards the central fixed cylinder 20. As the extrusion floating box 7 moves inward, the pressure sealing plate 65 first enters the forming cavity 181, and then, under the continued extrusion action, the forming box 18 is gradually snapped into the movable cavity 5 of the extrusion floating box 7, so that the forming cavity 181 is in a closed and continuously pressurized state during the forming process, thereby ensuring the density and shape stability of the syrup during the forming process.

[0036] To facilitate the introduction of syrup, a storage cavity 21 is formed inside the central fixed cylinder 20. The storage cavity 21 is connected to each forming cavity 181 through a guide hole 182. Figure 6 and Figure 7As shown, a material guiding mechanism 17 is fixedly installed inside the central fixed cylinder 20. The material guiding mechanism 17 includes a sealing box 19, a central support rod 171, an electromagnet 172, a driving metal guide plate 174, and a connecting spring 173. The central support rod 171 is fixedly located at the center of the sealing box 19, and forms a mounting surface at the position corresponding to each molding box 18. An electromagnet 172 is fixedly installed on each mounting surface, and a driving metal guide plate 174 that can be attracted by the electromagnet 172 is provided. The driving metal guide plate 174 is connected to the central support rod 171 through the connecting spring 173, so that it remains in a reset state when not energized. A material guiding sealing rod 22 is provided on the side of the driving metal guide plate 174 away from the connecting spring 173. The material guiding sealing rod 22 passes through the sealing box 19 and is inserted into the corresponding guide hole 182, flush with the bottom surface of the molding cavity 181, thereby sealing the guide hole 182 when not guiding material, without affecting the flatness of the bottom surface of the molding cavity 181.

[0037] When syrup needs to be introduced into a molding cavity 181, the corresponding electromagnet 172 is energized, attracting and driving the metal guide plate 174. This causes the metal guide plate 174 to displace against the elastic force of the connecting spring 173, pulling the guide sealing rod 22 out of the guide hole 182. This connects the storage cavity 21 with the molding cavity 181, allowing the fluid syrup to enter the molding cavity 181 under pressure or gravity. After the syrup introduction is complete, the electromagnet 172 is de-energized, the connecting spring 173 resets, and the drive metal guide plate 174 and guide sealing rod 22 reset and re-seal the guide hole 182.

[0038] The central fixed cylinder 20 is externally connected to a feed pipe 4. The input end of the feed pipe 4 is connected to a syrup feeding system via a peristaltic pump. The peristaltic pump is used to quantitatively deliver liquid syrup to the storage chamber 21 inside the central fixed cylinder 20. An electric heating device is also installed inside the central fixed cylinder 20, which, together with a temperature control device, heats and controls the temperature of the syrup in the storage chamber 21, ensuring that the syrup maintains good fluidity before entering the molding chamber 181 and preventing premature solidification due to temperature drop.

[0039] In this embodiment, the extrusion floating box 7 is made of metal and has multiple semiconductor cooling chips embedded inside it. The hot side of each semiconductor cooling chip faces the outside of the forming roller 2 and is exposed, while the cold side is in close contact with the extrusion floating box 7. After the forming box 18 is snapped into the movable cavity 5 and the forming is completed, the semiconductor cooling chips quickly remove the heat from the forming box 18 and the syrup in the forming cavity 181, achieving rapid directional cooling of the syrup and thus accelerating the candy setting speed.

[0040] After molding is complete, the molding roller 2 continues to rotate to the demolding area. The L-shaped pull rod 23 inside the molding box 18 is pulled by the magnetic force of the magnetic pull plate 64, causing the molded hard candy to separate from the molding cavity 181. Under its own weight, the hard candy slides down along the conical discharge cavity 99 formed inside the molding roller 2 and is discharged through the discharge openings on both sides of the molding roller 2. The flexible buffer layer laid inside the conical discharge cavity 99 effectively reduces the impact force when the hard candy is discharged, preventing damage.

[0041] Furthermore, by setting a torsion spring between the central fixed cylinder 20 and the rectangular mounting block 15, and embedding the rectangular mounting block 15 into the rotatable rotating disk 16, the angle position of the central fixed cylinder 20 can be adjusted when needed, and locked by the locking screw 9 on the top of the third support 13, thereby enabling the selection and switching of different molding boxes 18 during the molding process.

[0042] In this embodiment, the function of the torsion spring is to give the central fixed cylinder 20 a certain circumferential rotation capability, but not a large rotation capability. The purpose is to allow the forming roller 2 and the driving roller 1 to have a yielding property during circumferential rotation, so as to avoid position interference caused by the rigid separation of the forming roller 2 and the driving roller 1. Since the central fixed cylinder 20 does not rotate, while the forming cylinder does rotate, after the forming is completed, the central fixed cylinder 20 needs to follow the forming cylinder to rotate a certain angle before separating. Finally, the central fixed cylinder 20 elastically resets under the action of the torsion spring.

[0043] This invention enables rapid switching between multiple hard candy models, continuous compression and stable cooling during the molding process, and automatic demolding and unloading, while ensuring molding quality. The overall structure is reasonable, the operation is stable, and it is suitable for continuous hard candy production.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A double-roll synchronous extrusion hard candy forming machine, characterized in that, include: The driving roller (1) and the forming roller (2) are driven to rotate by a driving mechanism respectively. A central fixing cylinder (20) is installed inside the forming roller (2), and the forming roller (2) rotates circumferentially relative to the central fixing cylinder (20); A group of more than one molding box (18) of different models are arranged in a circular manner on the central fixed cylinder (20), and each group of molding boxes (18) is provided with a molding cavity (181) of different models; The extrusion floating box (7) is circumferentially floating on the forming roller (2). The forming roller (2) is provided with a floating mounting groove (8). The extrusion floating box (7) is floating in the floating mounting groove (8). A first elastic reset mechanism is provided between the extrusion floating box (7) and each floating mounting groove (8). A clamping and retaining mechanism (6) is provided in the movable cavity (5) inside the extrusion floating box (7). Each clamping and retaining mechanism (6) is provided with a molding box (18). When the extrusion floating box (7) is subjected to external pressure and moves toward the molding box (18), the clamping and retaining mechanism (6) clamps and seals the external opening of the molding cavity (181). As the extrusion floating box (7) continues to move, the molding box (18) on the corresponding side is snapped into the movable cavity (5). A second elastic reset mechanism is provided between the pressing and holding mechanism (6) and the extrusion floating box (7), and the second elastic reset mechanism maintains the molding cavity (181) in a constant pressing state. It also includes a material guiding mechanism (17), which is fixedly installed inside the central fixing cylinder (20). The central fixing cylinder (20) has a material storage cavity (21), and the material storage cavity (21) is connected to each of the forming cavities (181) through a guide hole (182).

2. The double-roll synchronous extrusion hard candy forming machine according to claim 1, characterized in that: The extrusion floating box (7) is made of metal material. Multiple semiconductor cooling chips are embedded in the extrusion floating box (7). The hot side of each semiconductor cooling chip is exposed outside the forming cylinder, and its cold side is attached to the extrusion floating box (7). When the forming box (18) is snapped into the movable cavity (5), the extrusion floating box (7) rapidly cools the snapped forming box (18).

3. The double-roll synchronous extrusion hard candy forming machine according to claim 1, characterized in that: Each of the first elastic reset mechanisms includes a first reset spring. The inner wall of the floating mounting groove (8) is provided with an elastic reset slide groove. The squeezing floating box (7) is provided with a first limiting baffle at the position corresponding to the elastic reset slide groove. The first reset spring is disposed in the elastic reset slide groove. One end of the first reset spring contacts the first limiting baffle, and the other end of the first reset spring contacts and supports one side end face of the elastic reset slide groove. When the squeezing floating box (7) is subjected to external squeezing force and moves inward, it drives the first limiting baffle to squeeze the first reset spring, and causes the first reset spring to be elastically compressed.

4. The double-roll synchronous extrusion hard candy forming machine according to claim 1, characterized in that: Each of the pressing and holding mechanisms (6) includes a sliding holding block (61), a magnetic traction plate (64), and a pressure sealing plate (65). The sliding holding block (61) is slidably disposed in the movable cavity (5). A first connecting part (66) is provided between the sliding holding block (61) and the magnetic traction plate (64). The pressure sealing plate (65) is fixedly connected to the magnetic traction plate (64) through a second connecting part.

5. The double-roll synchronous extrusion hard candy forming machine according to claim 4, characterized in that: The cross-sectional area of ​​the pressure sealing plate (65) is equal to the cross-sectional area of ​​each molding cavity (181), so that when the pressure sealing plate (65) is inserted into the molding cavity (181), it can seal the outer opening of the molding cavity (181). The side of the pressure sealing plate (65) facing the molding cavity (181) is provided with an inclined guide surface. The upper and lower surfaces of the magnetic traction plate (64) correspond to the upper and lower surfaces of the molding box (18).

6. The double-roll synchronous extrusion hard candy forming machine according to claim 5, characterized in that: Each of the molding boxes (18) is provided with one or more "L"-shaped pull rods (23), and each pull rod (23) has a magnetic block on its end face. The magnetic pull plate (64) is a magnetic plate that magnetically attracts the magnetic block on the pull rod (23). The hard candy in the molding cavity (181) is pulled out by the "L"-shaped pull rod (23).

7. The double-roll synchronous extrusion hard candy forming machine according to claim 4, characterized in that: The sliding retaining block (61) has an "I" shaped cross section. The second elastic reset mechanism is disposed between the sliding retaining block (61) and the extrusion floating box (7). The second elastic reset mechanism includes a second limiting baffle (62) and one or more second reset springs (63). One end of the second limiting baffle (62) is fixedly connected to the extrusion floating box (7), one end of the second reset spring (63) is fixedly connected to the second limiting baffle (62), and the other end of the second limiting baffle (62) is fixedly supported by the sliding retaining block (61). When the pressure sealing plate (65) seals the molding box (18), as the squeezing floating box (7) continues to move inward, the sliding retaining block (61) moves in the active cavity (5) and squeezes the second reset spring (63), so that the pressure sealing plate (65) always keeps the liquid syrup in a compressed state during the molding process.

8. The double-roll synchronous extrusion hard candy forming machine according to claim 1, characterized in that: The material guiding mechanism (17) includes a sealed box (19), and a central support rod (171) is fixedly installed in the center of the sealed box (19). The central support rod (171) forms a mounting surface for each molding box (18). An electromagnet (172) is fixedly installed on each mounting surface. A driving metal guide plate (174) is provided on each mounting surface. A connecting spring (173) is provided between the driving metal guide plate (174) and the central support rod (171). One end of the connecting spring (173) is fixedly connected to the driving metal guide plate (174), and the other end of the connecting spring (173) is fixedly connected to the central support rod (171). The driving metal guide plate (174) is provided with a guide sealing rod (22) on the side away from the connecting spring (173). The guide sealing rod (22) passes through the sealing box (19) and is inserted into the guide hole (182) and is flush with the bottom surface of the forming cavity (181). When the electromagnet (172) on the corresponding side is energized, it attracts the driving metal guide plate (174) and causes the guide sealing rod (22) to separate from the guide hole (182), and makes the storage cavity (21) and the forming cavity (181) connected. A feed pipe (4) is connected to the outside of the central fixed cylinder (20). The input end of the feed pipe (4) is fed with fluid syrup through a peristaltic pump. An electric heating device with a temperature control device is also provided inside the central fixed cylinder (20) to maintain the fluidity of the fed syrup.

9. The double-roll synchronous extrusion hard candy forming machine according to claim 1, characterized in that: The outer surface of the drive roller (1) is provided with one or more extrusion protrusions (3) at equal intervals. When the extrusion protrusions (3) contact the extrusion floating box (7), the extrusion floating box (7) moves toward the inner forming box (18). The drive roller (1) is rotatably supported on both sides by the first support base (12), the forming roller (2) is rotatably supported on both sides by the second support base (13), and a bearing is installed in the middle. The drive roller (1) is driven to rotate by the first drive mechanism (11), and the forming roller (2) is driven to rotate by the second drive mechanism (10). The forming roller (2) has conical dropping cavities (99) that are inclined toward the second support seat (13) on both sides. The forming roller (2) has dropping openings on both sides. A flexible buffer layer is laid in the conical dropping cavity (99) to reduce the impact force of the hard candy dropping.

10. The double-roll synchronous extrusion hard candy forming machine according to claim 1, characterized in that: The central fixing cylinder (20) extends to the outside of the forming roller (2) on both sides and is supported and fixed by an independently provided third support base (13). A rectangular mounting block (15) is installed on each of the two protruding ends of the central fixing cylinder (20). A torsion spring is installed between the central fixing cylinder (20) and the rectangular mounting block (15). The rectangular mounting block (15) is embedded in a rotating disk (16). The rotating disk (16) is rotatably installed in the third support base (13). A locking screw (9) is provided on the top of the third support base (13) to lock the rotating disk (16).

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