Hard candy liquid sandwich production device and method

Abstract

The invention relates to the technical field of filled candy production, and discloses a hard candy liquid sandwich production device which comprises a base, a rotating seat is mounted above the base, a stepping motor is mounted in the base, a rotating shaft of the stepping motor is fixedly connected with the bottom of the rotating seat, and a hydraulic push rod is fixedly mounted in the axis direction of the rotating seat. A mold core disc is fixedly mounted at the upper end of the hydraulic push rod, and mold core grooves are distributed in the mold core disc in a circumferential array manner; a fixing disc is arranged above the mold core disc, and a first powder discharging mechanism, a first pressing mold, a sandwich discharging mechanism, a second powder discharging mechanism and a second pressing mold are sequentially arranged on the fixing disc in the circumferential direction. According to the method for producing the liquid sandwich of the hard candy, a process path of carrying out online sandwich injection after the candy blank is pressed to be concave is adopted, so that the dependence of a traditional process on the elasticity and size consistency of a prefabricated sandwich is thoroughly eliminated, and the technical problems that the sandwich is easy to crack and block in the conveying process are fundamentally solved; and the yield and the production stability of the filled candies are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of filled candy production technology, specifically to a device and method for producing liquid fillings for hard candies. Background Technology

[0002] Currently, the production of liquid fillings in hard candies mostly adopts a process that combines a rotary tablet press with a sugar sorting machine. The pre-made spherical liquid fillings are filled into the sugar powder holes one by one through a core-filling disc.

[0003] However, this type of device has certain limitations: First, it is too dependent on the properties of the sandwich core, requiring the core to have stable elasticity and surface strength; otherwise, it is prone to cracking, adhesion or blockage during conveying, vibration and pressing. Secondly, the consistency of the sandwich dimensions requires high matching accuracy between the conveyor rail groove and the core injection hole. Any deviation can easily lead to jamming, core leakage, or core injection failure, affecting continuous production efficiency and product yield.

[0004] The existing patent CN114568573B describes a production device and method for liquid filling in hard functional candies. It includes structures such as inclined troughs, tracks, and air nozzles for waste removal, which attempt to improve the stability of filling conveying and filling. However, it still does not solve the problem of the inherent fragility of the filling as a "solid preform" in mechanical conveying.

[0005] Therefore, we propose a production apparatus and method for liquid filling in hard candies to solve the problems mentioned above. Summary of the Invention

[0006] This invention provides a production apparatus and method for liquid filling in hard candies, which can solve the problems of easy jamming, leakage or filling failure in the prior art when filling pre-made spherical liquid fillings one by one into the candy powder punch.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A production device for liquid filling in hard candies includes a base, a rotating seat mounted on top of the base, a stepper motor installed inside the base, the shaft of the stepper motor being fixedly connected to the bottom of the rotating seat, a hydraulic push rod fixedly mounted along the axial direction of the rotating seat, a mold core plate fixedly mounted on the upper end of the hydraulic push rod, and mold core grooves arranged in a circumferential array on the mold core plate; a fixed plate is provided above the mold core plate, and a first powder dispensing mechanism, a first pressing mold, a filling dispensing mechanism, a second powder dispensing mechanism, and a second pressing mold are sequentially arranged along the circumferential direction on the fixed plate, wherein the distance between the center of the first powder dispensing mechanism, the first pressing mold, the filling dispensing mechanism, the second powder dispensing mechanism, and the second pressing mold and the center of the fixed plate is equal to the distance from the center of the mold core groove to the center of the mold core plate.

[0008] Preferably, the fixed plate is connected to support columns on both sides, and the lower end of the support columns is fixedly connected to the ground.

[0009] Preferably, the first powder discharging mechanism includes a hopper, a feeding pipe fixedly connected to the lower end of the hopper, a spiral conveying rod rotatably arranged inside the feeding pipe, a servo motor installed at the upper end of the hopper, the shaft of the servo motor being fixedly connected to the spiral conveying rod, and an absolute value sensor being arranged on the shaft of the servo motor for controlling the sugar powder conveying amount; the second powder discharging mechanism has the same structure as the first powder discharging mechanism.

[0010] Preferably, the first mold is adapted to the core groove, and the first mold can be slidably inserted into the core groove. The core groove includes a bottom groove with a hemispherical bottom and a through groove with a cylindrical top. The first mold is cylindrical and has a hemispherical top groove symmetrical to the bottom groove at its lower end. A core rod is fixedly provided in the middle of the top groove for pressing the sugar powder into shape and pressing out the sandwich groove through the core rod.

[0011] Preferably, a bottom mold rod is provided at the center of the bottom groove, and a guide groove is connected to the lower end of the bottom groove. The bottom mold rod is slidably disposed inside the guide groove, and the upper end of the bottom mold rod is tightly fitted with the bottom groove to form a smooth hemisphere. A return spring is provided inside the guide groove, and a limit block is fixedly connected to one end of the bottom mold rod located inside the guide groove. The return spring is sleeved on the outside of the bottom mold rod and pushes the limit block to slide away from the bottom groove.

[0012] Preferably, the sandwich discharge mechanism includes a sandwich pusher tube, a piston is slidably connected inside the sandwich pusher tube, an electric telescopic rod is fixedly installed at the upper end of the sandwich pusher tube, the telescopic end of the electric telescopic rod is fixedly connected to the piston, and a discharge head is provided at the lower end of the sandwich pusher tube, with a one-way valve installed at the end of the discharge head.

[0013] Preferably, the lower side of the sandwich pusher tube is fixedly connected to an insulated conveying pipe, the end of the insulated conveying pipe away from the sandwich pusher tube is fixedly connected to a sandwich material bucket, and an electromagnetic switch valve is installed between the insulated conveying pipe and the sandwich pusher tube.

[0014] Preferably, the second mold is a cylinder that matches the through groove of the mold core groove, and the lower end is provided with a hemispherical top groove that is symmetrical with the bottom groove.

[0015] Preferably, the upper end of the mold core groove is provided with a discharge port that is inclined outward along the diameter of the mold core disk; a directional air outlet pipe is provided on the fixed disk between the first powder discharge mechanism and the second mold, and an electrically controlled ejector rod is provided below the directional air outlet pipe, the electrically controlled ejector rod being located below the rotation path of the mold core groove; A discharge channel is provided on the outside of the directional air outlet pipe. The discharge channel is connected to the discharge port of the mold core groove between the first powder discharge mechanism and the second mold. The discharge channel and the mold core groove are rotatably engaged. A support rod is provided at the bottom of the discharge channel.

[0016] A method for producing liquid fillings for hard candies includes the following steps: S1: The stepper motor drives the rotating seat and the mold core plate to rotate intermittently, so that the mold core groove passes through each station on the fixed plate in sequence; S2: When the mold core groove reaches the first powder outlet station, the hydraulic push rod pushes the mold core plate to rise, and the first powder outlet mechanism accurately fills the mold core groove with sugar powder; S3: The mold core plate rotates to the first pressing station, and the first pressing die is inserted into the mold core groove to press the sugar powder into a sugar blank with pits; S4: The mold core plate rotates to the position of the core ejection mechanism, and the core ejection mechanism injects liquid core into the recess in a quantitative manner. S5: The mold core plate rotates to the second powder outlet station, and the second powder outlet mechanism covers the surface of the sugar blank with filling with an upper layer of sugar powder; S6: The mold core plate rotates to the second pressing mold station, and the second pressing mold performs final pressing and sealing on the sugar blank to form a complete candy; S7: The mold core plate rotates to the demolding station, the electric control ejector pushes the bottom mold rod upward to eject the formed candy, and at the same time the directional air outlet blows the candy toward the discharge port, so that the candy slides into the collection device along the discharge channel.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are: The hard candy liquid filling production device of the present invention completely eliminates the dependence of traditional processes on the elasticity and dimensional consistency of pre-made fillings by adopting a process path of online injection of fillings after the sugar blank is depressed. It fundamentally solves the technical problems of easy breakage and jamming of fillings during the transportation process, and significantly improves the yield and production stability of filled candies.

[0018] This invention achieves precise quantitative filling of sugar powder through a spiral conveying mechanism and an absolute value sensor. The core injection cavity is formed in one step using a first mold and a core rod. Combined with a heat-insulating conveying and piston core injection system, the liquid sandwich is quantitatively injected. Finally, it is sealed and formed by a second mold. Demolding is assisted by an electrically controlled ejector rod and airflow. This invention realizes fully automated continuous production from sugar powder filling, pressing, core injection to sealing and demolding, effectively improving production efficiency and product consistency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the mold core disk structure of the present invention; Figure 3 This is a side cross-sectional view of the device of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram at point A; Figure 5 This is a schematic diagram of the bottom structure of the fixed disk of the present invention; Figure 6 This is a schematic cross-sectional view of the hopper structure of the present invention; Figure 7 This is a schematic diagram of the structure of the present invention.

[0020] The components include: 1. Base; 2. Stepper motor; 3. Rotating seat; 4. Hydraulic push rod; 5. Mold core plate; 6. Mold core groove; 7. Guide groove; 8. Bottom mold rod; 9. Return spring; 10. Electrically controlled push rod; 11. Fixed plate; 12. Support column; 22. Hopper; 23. Discharge pipe; 24. Screw conveyor rod; 25. Servo motor; 26. Absolute value sensor; 37. First mold; 48. Sandwich pusher pipe; 49. Piston; 40. Electric telescopic rod; 41. Discharge head; 42. One-way valve; 43. Insulated conveying pipe; 44. Sandwich hopper; 45. Electromagnetic switch valve; 56. Second mold; 67. Directional air outlet pipe; 68. Discharge channel. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1: Please see Figure 1-7 The present invention provides a technical solution: A liquid filling production device for hard candies includes a base 1, a rotating seat 3 mounted on top of the base 1, a stepper motor 2 installed inside the base 1, the shaft of the stepper motor 2 fixedly connected to the bottom of the rotating seat 3, a hydraulic push rod 4 fixedly mounted along the axis of the rotating seat 3, a mold core plate 5 fixedly mounted at the upper end of the hydraulic push rod 4, and mold core grooves 6 arranged in a circumferential array on the mold core plate 5; a fixed plate 11 is arranged above the mold core plate 5, and a first powder dispensing mechanism, a first pressing mold 32, a filling dispensing mechanism, a second powder dispensing mechanism, and a second pressing mold 51 are arranged sequentially along the circumferential direction on the fixed plate 11, wherein the distance between the center of the first powder dispensing mechanism, the first pressing mold 32, the filling dispensing mechanism, the second powder dispensing mechanism, and the second pressing mold 51 and the center of the fixed plate 11 is equal to the distance between the center of the mold core grooves 6 and the center of the mold core plate 5. Support columns 12 are connected to both sides of the fixed plate 11, and the lower ends of the support columns 12 are fixedly connected to the ground.

[0023] Through the above technical solution, the stepper motor 2 drives the rotating seat 3 and the mold core plate 5 to rotate intermittently, so that the mold core groove 6 passes under each station on the fixed plate 11 in sequence. Then the hydraulic push rod 4 pushes the mold core plate 5 to rise, so that the mold core groove 6 cooperates with the corresponding station above. First, the first powder dispensing mechanism precisely fills the mold core groove 6 with sugar powder. Under the push of the hydraulic push rod 4, the first powder dispensing mechanism cooperates with the mold core groove 6 containing sugar powder to press the sugar powder into a sugar blank with pits. Then, the mold core plate 5 continues to descend, rotates a certain angle, and then continues to rise, so that the filling dispensing mechanism injects liquid filling into the pits in a metered manner. Then, the second powder dispensing mechanism covers the upper layer of sugar powder. Finally, the second pressing mold 51 performs final pressing and sealing to form a complete filled candy.

[0024] Each time the equipment is turned on, when processing candy on the first ring of mold core grooves 6 on the mold core plate 5, each mold core groove 6 needs to be processed independently. After the first ring of mold core grooves 6 enters the second pressing mold 51, during subsequent processing and production, the six mold core grooves 6 on the mold core plate 5 can work simultaneously. The first five mold core grooves 6 are respectively filled with sugar powder for the first time, pressed for the first time, injected with filling, filled with sugar powder for the second time, and pressed for the second time. After the first five steps are completed, the mold core plate 5 continues to rotate, rotating it to the discharge station to push out the hard candy with filling formed inside the mold core groove 6. The mold core plate 5 rises once, completing the processing steps of the five mold core grooves 6 at the same time. When the mold core groove 6 is completed, it rotates to the next station, which is the discharge station, to push out the hard candy that has been processed in the mold core groove 6.

[0025] This solution completely eliminates the reliance on the elasticity and dimensional consistency of pre-made fillings by changing the "solid filling assembly" to "online filling after the sugar blank is pressed inward". It avoids the problems of filling breakage and jamming during transportation and realizes the precise injection of liquid fillings and continuous automated production of candy.

[0026] The first powder discharging mechanism includes a hopper 22, with a feeding pipe 22 fixedly connected to the lower end of the hopper 22. A spiral conveying rod 23 is rotatably arranged inside the feeding pipe 22. A servo motor 24 is installed at the upper end of the hopper 22. The rotating shaft of the servo motor 24 is fixedly connected to the spiral conveying rod 23. An absolute value sensor 25 is installed on the rotating shaft of the servo motor 24 for controlling the sugar powder conveying amount. The second powder discharging mechanism has the same structure as the first powder discharging mechanism.

[0027] Through the above scheme, the first powder dispensing mechanism drives the spiral conveyor rod 23 to rotate via the servo motor 24, quantitatively pushing the sugar powder in the hopper 22 into the feeding pipe 22. The absolute value sensor 25 monitors the rotation angle of the servo motor 24 shaft in real time, thereby precisely controlling the amount of sugar powder delivered to the mold core groove 6 each time. This structure solves the problem of inconsistent weight caused by differences in the fluidity of traditional sugar powder filling, ensuring the standardized molding of the sugar base and facilitating subsequent core injection and sealing work.

[0028] The first mold 32 is adapted to the core groove 6, and the first mold 32 can be slidably inserted into the core groove 6. The core groove 6 includes a bottom groove with a hemispherical bottom and a through groove with a cylindrical top. The first mold 32 is cylindrical and has a hemispherical top groove symmetrical to the bottom groove at its lower end. A core rod is fixedly installed in the middle of the top groove for pressing the sugar powder into shape and pressing out the sandwich groove through the core rod.

[0029] Through the above scheme, the first mold 32 is inserted into the core groove 6 under the push of the hydraulic push rod 4. The hemispherical top groove at its lower end and the bottom groove of the core groove 6 together compress the sugar powder, while the core rod presses out a regular sandwich cavity in the center of the sugar blank. This achieves the direct formation of the core cavity during pressing and molding, eliminating the pre-made sandwich conveying process and fundamentally avoiding the problems of cracking and jamming caused by insufficient sandwich strength or dimensional deviation.

[0030] A bottom mold rod 8 is provided at the center of the bottom groove, and a guide groove 7 is connected to the lower end of the bottom groove. The bottom mold rod 8 is slidably disposed inside the guide groove 7, and the upper end of the bottom mold rod 8 is tightly fitted with the bottom groove to form a smooth hemisphere. A return spring 9 is provided inside the guide groove 7. A limit block is fixedly connected to one end of the bottom mold rod 8 inside the guide groove 7. The return spring 9 is sleeved on the outside of the bottom mold rod 8 and pushes the limit block to slide away from the bottom groove.

[0031] The bottom mold rod 8, under the action of the return spring 9, always maintains a downward trend, ensuring its upper end fits tightly with the bottom groove to form a complete hemispherical cavity, thus guaranteeing the integrity of the candy's bottom shape. When demolding is required, the external electric ejector pushes the bottom mold rod 8 upward, overcoming the elasticity of the return spring 9, causing the bottom mold rod 8 to rise and smoothly eject the formed hard candy from the mold core groove 6. After demolding, the electric ejector retracts, and the bottom mold rod 8 automatically resets under the action of the return spring 9, ready for the next molding operation. This solution achieves automatic demolding of the candy, effectively avoiding the problem of sticking to the mold and ensuring the stability of continuous production.

[0032] Example 2: Please see Figure 1-7 Furthermore, in conjunction with Example 1, it is obtained that, The sandwich discharge mechanism includes a sandwich pusher tube 41, a piston 42 is slidably connected inside the sandwich pusher tube 41, an electric telescopic rod 43 is fixedly installed at the upper end of the sandwich pusher tube 41, the telescopic end of the electric telescopic rod 43 is fixedly connected to the piston 42, and a discharge head 44 is provided at the lower end of the sandwich pusher tube 41, and a one-way valve 45 is installed at the end of the discharge head 44.

[0033] The piston 42 is pushed by the electric telescopic rod 43 to move inside the core feeding tube 41, and the liquid core is pressed out from the discharge head 44. The one-way valve 45 at the end of the discharge head 44 can prevent the core from flowing back, ensuring the accuracy and consistency of the core injection amount each time, and realizing the precise quantitative injection of liquid core.

[0034] The lower side of the sandwich pusher tube 41 is fixedly connected to a heat-insulating conveying tube 46. The end of the heat-insulating conveying tube 46 away from the sandwich pusher tube 41 is fixedly connected to a sandwich material bucket 47. An electromagnetic switch valve 48 is installed between the heat-insulating conveying tube 46 and the sandwich pusher tube 41.

[0035] The heat-insulating conveying pipe 46 can maintain the material temperature between the sandwich material barrel 47 and the sandwich pusher pipe 41. The electromagnetic switch valve 48 controls the flow of sandwich material, so that the sandwich pusher pipe 41 can continuously obtain sandwich raw materials with stable temperature. When the sandwich inside the sandwich pusher pipe 41 is pushed out by the piston 42 each time, the electromagnetic switch valve 48 opens, the piston 42 moves away from the one-way valve 45, and draws the liquid sandwich inside the sandwich material barrel 47 into the sandwich pusher pipe 41. Then the electromagnetic switch valve 48 closes, ensuring the continuity of the core injection process and the stability of the sandwich texture.

[0036] The second mold 51 is a cylindrical shape that matches the through groove of the mold core groove 6, and has a hemispherical top groove at the lower end that is symmetrical to the bottom groove.

[0037] The second mold 51, through its lower hemispherical top groove, cooperates with the mold core groove 6 to press the upper sugar powder and the sugar blank with filling into a complete candy. This structure ensures the sealing of the upper part of the candy, effectively prevents the filling from leaking out, and completes the final packaging.

[0038] The upper end of the mold core groove 6 is provided with a discharge port that is inclined outward along the radial direction of the mold core disk 5; a directional air outlet pipe 61 is provided on the fixed disk 11 between the first powder discharging mechanism and the second pressing mold 51, and an electrically controlled push rod 10 is provided below the directional air outlet pipe 61, which is located below the rotation path of the mold core groove 6; a discharge channel 62 is provided on the outside of the directional air outlet pipe 61, which is connected to the discharge port of the mold core groove 6 between the first powder discharging mechanism and the second pressing mold 51, and the discharge channel 62 is rotatably engaged with the mold core groove 6, and a support rod is provided at the bottom of the discharge channel 62.

[0039] The electrically controlled ejector rod 10 ejects the molded candy upwards at the demolding station. The directional air outlet 61 blows the ejected molded candy toward the discharge port. The two work together to achieve automatic demolding of the candy from the mold core groove 6, ensuring production continuity. The discharge channel 62 is connected to the discharge port of the mold core groove 6. The ejected candy slides into the discharge channel 62 along the inclined discharge port and is automatically collected. The support rod provides stable support for the discharge channel 62, ensuring a smooth and orderly discharge process.

[0040] The working principle of this hard candy liquid filling production device is as follows: Stepper motor 2 drives rotating seat 3 and mold core disk 5 to perform intermittent rotational motion, so that mold core groove 6 passes through each station on fixed disk 11 in sequence; after entering a specific station, mold core disk 5 rises, so that mold core groove 6 cooperates with the corresponding station; At the first powder dispensing station, the servo motor 24 drives the spiral conveyor 23 to fill a quantitative amount of sugar powder into the mold core groove 6; then the first pressing mold 32 is inserted into the mold core groove 6 to press the sugar powder into a sugar blank with pits; next, the filling dispensing mechanism pushes the piston 42 through the electric telescopic rod 43 to inject the liquid filling supplied by the heat-insulating conveying pipe 46 into the pit through the dispensing head 44; then the second powder dispensing mechanism covers the upper layer of sugar powder; finally, the second pressing mold 51 completes the final pressing and sealing to form a complete candy; after molding, the electric control push rod 10 pushes the bottom mold rod 8 upward to eject the candy, and at the same time the directional air outlet pipe 61 blows the candy toward the discharge port, so that the candy slides into the collection device along the inclined discharge channel 62, realizing fully automatic continuous production.

[0041] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A hard candy liquid center production device comprising a base (1), characterized in that: The base (1) is provided with a rotating seat (3) above, a stepping motor (2) is installed inside the base (1), the rotating shaft of the stepping motor (2) is fixedly connected with the bottom of the rotating seat (3), a hydraulic push rod (4) is fixedly installed in the axial direction of the rotating seat (3), a mold core disc (5) is fixedly installed at the upper end of the hydraulic push rod (4), and a plurality of mold core grooves (6) are circumferentially arranged on the mold core disc (5); a fixed disc (11) is arranged above the mold core disc (5), a first powder discharging mechanism, a first mold (32), a sandwich discharging mechanism, a second powder discharging mechanism and a second mold (51) are sequentially arranged on the fixed disc (11) in the circumferential direction, and the distance between the centers of the first powder discharging mechanism, the first mold (32), the sandwich discharging mechanism, the second powder discharging mechanism and the second mold (51) and the center of the fixed disc (11) is equal to the distance between the center of the mold core groove (6) and the center of the mold core disc (5).

2. A hard candy liquid center production apparatus according to claim 1, characterized in that: Support columns (12) are connected to the two sides of the fixed disc (11), and the lower ends of the support columns (12) are fixedly connected with the ground.

3. A hard candy liquid center production apparatus according to claim 1, characterized in that: The first powder discharging mechanism comprises a hopper (22), a discharging pipe (22) is fixedly and communicatively connected to the lower end of the hopper (22), a spiral conveying rod (23) is rotatably arranged in the discharging pipe (22), a servo motor (24) is installed at the upper end of the hopper (22), the rotating shaft of the servo motor (24) is fixedly connected with the spiral conveying rod (23), an absolute value sensor (25) is arranged on the rotating shaft of the servo motor (24) and is used for controlling the sugar powder conveying amount; the second powder discharging mechanism is the same in structure as the first powder discharging mechanism.

4. A hard candy liquid center production apparatus according to claim 1, characterized in that: The first mold (32) is matched with the mold core groove (6), and the first mold (32) is slidably inserted into the mold core groove (6), the mold core groove (6) comprises a bottom groove with a semispherical bottom and a through groove with a cylindrical upper part, the first mold (32) is cylindrical and provided with a semispherical top groove which is symmetrical to the bottom groove at the lower end, and a core rod is fixedly arranged in the middle of the top groove and used for sugar powder compression molding and sandwich groove extrusion through the core rod.

5. A hard candy liquid center production apparatus as defined in claim 4, characterized in that: A bottom mold rod (8) is arranged at the center of the bottom groove, a guide groove (7) is communicatively connected to the lower end of the bottom groove, the bottom mold rod (8) is slidably arranged in the guide groove (7), and the upper end of the bottom mold rod (8) is tightly matched with the bottom groove to form a smooth semispherical shape; a reset spring (9) is arranged in the guide groove (7), one end of the bottom mold rod (8) in the guide groove (7) is fixedly connected with a limiting block, and the reset spring (9) is sleeved outside the bottom mold rod (8) and pushes the limiting block to slide away from the bottom groove.

6. A hard candy liquid center production apparatus as defined in claim 1, wherein: The sandwich discharging mechanism comprises a sandwich push pipe (41), a piston (42) is slidably connected in the sandwich push pipe (41), an electric telescopic rod (43) is fixedly installed at the upper end of the sandwich push pipe (41), the telescopic end of the electric telescopic rod (43) is fixedly connected with the piston (42), a discharging head (44) is arranged at the lower end of the sandwich push pipe (41), and a one-way valve (45) is installed at the end of the discharging head (44).

7. A hard candy liquid center production apparatus according to claim 6, characterized in that: The lower end side of the sandwich pushing tube (41) is fixedly communicated with a heat preservation conveying pipe (46), the end of the heat preservation conveying pipe (46) away from the sandwich pushing tube (41) is fixedly communicated with a sandwich material barrel (47), and the electromagnetic switch valve (48) is installed between the heat preservation conveying pipe (46) and the sandwich pushing tube (41).

8. A hard candy liquid center production apparatus as defined in claim 1, wherein: The second pressing die (51) is cylindrical and matched with the through groove of the mold core groove (6), and a hemispherical top groove symmetrical to the bottom groove is arranged at the lower end.

9. A hard candy liquid center production apparatus as defined in claim 1, wherein: The upper end of the mold core groove (6) is provided with a discharge port inclined outward along the radial direction of the mold core disc (5); the fixed disc (11) between the first powder discharging mechanism and the second pressing die (51) is provided with a directional air outlet pipe (61), and the electric control ejector rod (10) is arranged below the directional air outlet pipe (61) and below the rotating path of the mold core groove (6); The outer side of the directional air outlet pipe (61) is provided with a discharge channel (62), the discharge channel (62) is connected with the discharge port of the mold core groove (6) between the first powder discharging mechanism and the second pressing die (51), the discharge channel (62) is rotationally matched with the mold core groove (6), and the bottom of the discharge channel (62) is provided with a supporting rod.

10. A method for producing a hard candy liquid center using the hard candy liquid center production apparatus according to any one of claims 1 to 9, characterized by, The method comprises the following steps: S1: the intermittent rotary motion of the rotating seat (3) and the mold core disc (5) is driven by the stepping motor (2), so that the mold core groove (6) sequentially passes through each station on the fixed disc (11); S2: when the mold core groove (6) reaches the first powder discharging station, the hydraulic push rod (4) pushes the mold core disc (5) to rise, and the first powder discharging mechanism accurately fills the sugar powder into the mold core groove (6); S3: the mold core disc (5) is rotated to the first pressing die (32) station, the first pressing die (32) is inserted into the mold core groove (6) to press the sugar powder into a sugar blank with a recess; S4: the mold core disc (5) is rotated to the sandwich discharging mechanism station, and the sandwich discharging mechanism quantitatively injects the liquid center into the recess; S5: the mold core disc (5) is rotated to the second powder discharging station, and the second powder discharging mechanism covers the surface of the sugar blank with the injected center with upper layer sugar powder; S6: the mold core disc (5) is rotated to the second pressing die (51) station, and the second pressing die (51) performs final pressing and sealing on the sugar blank to form a complete candy; S7: the mold core disc (5) is rotated to the demolding station, the electric control ejector rod (10) pushes the bottom die rod (8) upward to eject the formed candy, and the candy is blown to the discharge port by the directional air outlet pipe (61), so that the candy slides into the collecting device along the discharge channel (62).

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