Seed pressing system

Abstract

The utility model discloses a seed pressing system which comprises a conveying device, a heating device, a hot pressing device, a cold pressing device and a cleaning device, the conveying device is provided with a lower die used for bearing product seeds and shaping the product seeds, and the hot pressing device and the cold pressing device are provided with upper dies used for extruding and shaping the product seeds. The cleaning device is used for cleaning the refluxed lower die; by means of the device, full-automatic conveying and transferring can be carried out on pressed shapes of product seeds, the production efficiency and the automation degree are high, the product seeds can be rapidly and accurately pressed into the needed unique shapes within 100-300 seconds, the rebound rate of pressed products is greatly reduced, and the finished product package output rate is remarkably increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seed pressing processing, and particularly relates to a seed pressing system. BACKGROUND

[0002] At present, in the process of granular products, there is a seed pressing process. At present, hydraulic packers or cylindrical barrels are used for seed pressing, that is, a fixed space is filled with a certain amount of product seed material, then the space is extruded by a hydraulic device, the product seed material in the space is extruded to deform, so that the product seed material changes from a rugby ball shape to a flat shape, and then the flat surface is cut to divide the product seed material into two pieces. The product seed material obtained in this way is flat and open, and has a texture similar to a lotus leaf edge on the cut edge, which is beautiful in appearance and meets the current market's aesthetic requirements for the appearance of product seed material products. However, the traditional seed pressing method involves large-scale centralized mixing and pressing, 80-500 kg of product seed material is put into each seed pressing cavity, the seed pressing of the packing press is about 500 kg each time, the pressure holding time is 1-12 hours, the seed pressing of the cylindrical barrel press is 80-100 kg each time, and the pressure holding time is 24-72 hours. The quality of the pressed seed cannot be guaranteed, and the amount of seed used is large; the product seed material is heated to 45-65 DEG C by single microwave heating or single steam heating, the heating efficiency is slow, and the product seed material quality is easily damaged by over-heating.

[0003] Patent No. CN222201796U discloses a seed pressing barrel, which comprises a bottom plate, a support rod fixedly connected to the top of the bottom plate, a top plate fixedly connected to the top of the support rod, a hydraulic cylinder fixedly connected to the top of the top plate, an output end of the hydraulic cylinder in sliding connection with the top plate, a pressing block fixedly connected to the lower end of the output end of the hydraulic cylinder, and a pressing plate in contact with the bottom of the pressing block. However, the above-mentioned scheme does not have a heating system and a refrigeration system on the pressing cavity, and the pressed shape is prone to rebound. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model aims to solve the problems of the prior art, such as the lack of a heating system and a refrigeration system in the pressing mold cavity of the existing product seed automatic pressing device, the rebound of the pressed shape, and the low product packaging rate.

[0005] The technical scheme of the utility model is as follows:

[0006] The utility model provides a seed pressing system, which comprises:

[0007] The conveying device is provided with a plurality of lower molds, and the upper surface of each lower mold is provided with a multi-curved surface accommodating groove matching the shape of the product seed material;

[0008] The feeding device is arranged upstream of the conveying device, and the seed pressing system further comprises:

[0009] The heating device is provided with a heating chamber above the conveying device.

[0010] The hot pressing device comprises a first pressing machine, an upper hot pressing plate, a lower hot pressing plate and upper dies.

[0011] The cold pressing device comprises a second pressing machine, an upper cold pressing plate, a lower cold pressing plate and upper dies.

[0012] The blanking device is arranged downstream of the conveying device.

[0013] Preferably, the device further comprises a cleaning device arranged below the conveying device.

[0014] Preferably, the conveying device comprises an upper conveying device and a lower conveying device, and the conveying directions of the upper conveying device and the lower conveying device are opposite.

[0015] Preferably, a preheating chamber is arranged downstream of the lower conveying device, and the preheating chamber is provided with an infrared heating instrument.

[0016] Preferably, the upper dies are provided with first air ducts, one end of each of the first air ducts is connected to compressed air, and the other end of each of the first air ducts is connected to the center of each of the multi-curved pressing blocks.

[0017] Preferably, the feeding device comprises a first turnover lifting device and an automatic feeding equipment, the first turnover lifting device is arranged at an upstream port of the conveying device, and the automatic feeding equipment is arranged above the conveying device.

[0018] Preferably, the upper hot pressing plate and the lower hot pressing plate are provided with heating pipes.

[0019] Preferably, the upper cold pressing plate and the lower cold pressing plate are provided with cooling pipes.

[0020] Preferably, the blanking device comprises a second turnover lifting device, a hopper and a discharge conveyor belt, the second turnover lifting device is arranged at the downstream end of the conveying device, the hopper is arranged directly below the second turnover lifting device, and the discharge conveyor belt is arranged below the hopper.

[0021] Preferably, the lower mold is provided with a second air passage, one end of the second air passage is connected to compressed air, and the other end is connected to the center of the multi-curved accommodating groove; the second turnover lifting device is provided with a blowing plate, a plurality of air channels adapted to the second air passage are arranged in the blowing plate, and compressed air is connected to the air channels; and the blowing plate is further provided with a clamping device.

[0022] Preferably, the outer surface of the hopper is provided with a visual detection module, and the shooting direction of the visual detection module is towards the discharge conveyor belt.

[0023] Preferably, the heating chamber is provided with one of a microwave heating instrument or an infrared heating instrument.

[0024] The utility model also provides a kind of fast and accurate compression process, comprising the following steps:

[0025] S1, charging: the product seed material dried after flavoring is placed in the lower mold;

[0026] S2, preheating: start the conveying device, and the lower mold and product seed material are transported to the heating device, and the lower mold and product seed material are preheated;

[0027] S3, hot pressing: start the conveying device, and the conveying device transports the lower mold loaded with product seed material to the lower side of the upper mold of hot press and contacts with lower pressing plate, starts hot press, and the upper mold moves downward, cooperates with lower mold to extrude and pressure-hold product seed material, and continuously heats the upper pressing plate and lower pressing plate of hot press, and after hot pressing, the upper mold moves upward;

[0028] S4, cold pressing: start the conveying device, and the conveying device transports the lower mold after hot pressing to the lower side of the upper mold of cold press and contacts with lower pressing plate; start cold press, and the upper mold moves downward, cooperates with lower mold to extrude and pressure-hold product seed material, and continuously refrigerates the upper pressing plate and lower pressing plate of cold press, and after cold pressing, the upper mold moves upward;

[0029] S5, blanking: start the drive belt, and the conveying device transports the lower mold after cold pressing to blanking area for blanking, and the lower mold returns.

[0030] Preferably, the utility model further comprises the following steps: S6, cleaning: start the cleaning pump to clean the returned lower mold.

[0031] Preferably, in step S2, the preheating temperature of the lower mold ranges from 80 DEG C to 160 DEG C.

[0032] Preferably, in step S3, hot pressing is phased:

[0033] Phase one, the upper die is pressed down to the first position, which is 0.5-2mm higher than the minimum limit position between the upper die and the lower die, and the upper die is kept at the first position for 1-10 seconds;

[0034] Phase two, the upper die continues to be pressed down to the minimum limit position of the upper die and the lower die, and after keeping pressure for 30-150 seconds, the upper pressing plate is lifted back to the initial position.

[0035] Preferably, in step S4, the pressure keeping time is 30-240 seconds, and the temperature range for cooling the upper pressing plate and the lower pressing plate is 5℃-20℃.

[0036] Compared with the prior art, the advantages of the utility model are:

[0037] 1、 the utility model discloses before carrying out the pressure shape, preheats the lower die and product seed material sufficiently, makes the moisture content variation of product seed material not more than ±1%, effectively guarantees the ductility and quality of product seed material, reduces the scrap rate.

[0038] 2、 the utility model discloses setting up hot pressing device, when carrying out hot pressing shaping to product seed material, keeps heating and pressure, makes the deformation of product seed material be more in place.

[0039] 3、 the utility model discloses still setting up cold pressing device, immediately carries out cooling and shaping to the product seed material just completing hot pressing shaping, effectively prevents the rebound of product seed material, greatly reduces the scrap rate.

[0040] 4、 the utility model discloses realized small batch automatic processing flow, greatly improved the efficiency of production and processing, reduced the scrap rate, greatly improved the economic benefit, reduced the production cost.

[0041] The detailed structure of the utility model is further described in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is the structure schematic diagram of the seed pressing system of the utility model;

[0043] Figure 2 It is the structure schematic diagram of the feeding device of the seed pressing system of the utility model;

[0044] Figure 3 It is the structure schematic diagram of the heating device of the seed pressing system of the utility model;

[0045] Figure 4 It is the structure schematic diagram of the hot pressing device of the seed pressing system of the utility model;

[0046] Figure 5The utility model discloses a cold pressing device structure schematic drawing of seed pressing system.

[0047] Figure 6 The utility model discloses a blanking device structure schematic drawing of seed pressing system.

[0048] Figure 7 The utility model discloses a lower mould structure schematic drawing.

[0049] Figure 8 The utility model discloses an upper mould structure schematic drawing.

[0050] Element serial number and name: 1, feeding device, 11, first turnover lifting device, 12, automatic feeding equipment, 2, heating device, 21, heating chamber, 3, hot pressing device, 31, first press, 32, upper hot pressing plate, 33, lower hot pressing plate, 4, cold pressing device, 41, second press, 42, upper cold pressing plate, 43, lower cold pressing plate, 5, blanking device, 51, second turnover lifting device, 52, hopper, 53, discharge conveyer belt, 54, visual inspection module, 55, air blowing plate, 56, clamping device, 6, conveying device, 61, upper layer conveying device, 62, lower layer conveying device, 7, lower mould, 71, second air hole, 72, multi-curved surface containing groove, 8, upper mould, 81, first air hole, 82, multi-curved surface pressing convex block, 9, cleaning device, 10, preheating device. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will combine the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations. The following detailed description of the embodiment of the utility model provided in the drawing is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of the utility model protection.

[0052] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs. The use of the terms "including", "containing", "comprising" and similar words in this present disclosure is intended to mean that present elements or objects listed after such terms are encompassed by the term, and that other elements or objects are not excluded. The use of the terms "connected" or "coupled" or similar words in this present disclosure is not limited to physical or mechanical connections, but can also include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0053] Referring to Figure 1 and Figure 8 The utility model provides a press seed system, including:

[0054] Conveying device 6: the conveying device 6 is equipped with multiple groups of lower mould 7, the lower mould 7 upper surface is equipped with the multiple curved surface accommodating groove 72 of fitting product seed material appearance, can form product seed material into the shape that meets market aesthetic feeling, conveying device 6 can select the conveying device of market existing, such as conveyor belt, conveying chain etc., in this embodiment, conveying device 6 includes upper layer conveying device 61 and lower layer conveying device 62, upper layer conveying device 61 is used to transport lower mould 7 and product seed material to each processing procedure, and lower layer conveying device 62 is used to backflow transport lower mould 7 that has completed discharging.

[0055] Referring to Figure 2 Feeding device 1: place in the upstream of conveying device 6, including first turnover lifting device 11 and automatic feeding equipment 12, the first turnover lifting device 11 is used to send back the lower mould 7 on lower layer conveying device 62 after turning over on upper layer conveying device 61, the feeding device 1 can adopt the automatic swing feeding equipment of market existing, and product seed material is put into the multiple curved surface accommodating groove 72 of lower mould 7 in automatic, product seed material can also be put into the multiple curved surface accommodating groove 72 of lower mould 7 manually in the mode of artificial feeding.

[0056] Referring to Figure 3The heating device 2 is provided with a heating chamber 21, which is arranged above the conveying device 6, and is provided with passages for the conveying device 6 to pass through at both ends. Steam can be introduced into the heating chamber 21, and a microwave heating instrument or an infrared heating instrument can be arranged in the heating chamber 21. The heating mode of the product seed material can be a combination of microwave heating and steam heating, or a combination of infrared heating and steam heating, so that the product seed material can be quickly heated to improve efficiency, and the moisture content of the product seed material can be controlled by adjusting the power of the two heating modes. When the product seed material is dry, the steam input amount can be increased, and the power of the microwave or infrared can be reduced. When the product seed material is wet, the steam input amount can be increased. The product seed material on the lower mold 7 is heated to 85-160℃, and the change in the moisture content of the product seed material is controlled to be not more than ±1%.

[0057] Please refer to Figure 4 The hot pressing device 3 includes a first pressing machine 31, an upper hot pressing plate 32, a lower hot pressing plate 33, and an upper mold 8. The first pressing machine 31 is arranged above the conveying device 6. The upper hot pressing plate 32 is fixedly connected to the execution rod of the first pressing machine 31. A plurality of upper molds 8 are fixed to the lower surface of the upper hot pressing plate 32. The lower surface of the upper mold 8 is provided with a plurality of curved surface pressing blocks 82 that match the shape of the product seed material. The curved surface pressing blocks 82 are matched with the curved surface accommodating grooves 72. The lower hot pressing plate is arranged below the lower mold 7, i.e., between the upper and lower layers of the conveying device 6. The upper hot pressing plate 32 and the lower hot pressing plate are provided with heating pipes that continuously introduce steam or hot water. The surface temperature of the upper hot pressing plate 32, the lower hot pressing plate, and the upper mold 8 can be controlled to be 85-160℃. When the upper mold 8 is combined with the lower mold 7, the minimum limit distance between the upper and lower molds 7 can be adjusted by a limiting block. If the overall diameter of the product seed material to be pressed is large, the limit distance can be increased. Conversely, if the diameter of the product seed material is small, the limit distance can be decreased. The purpose is to press the product seed material to a very good flat shape in a short time, to minimize the rebound of the product seed material after pressing, and to ensure that the product seed material is not cracked or damaged.

[0058] The pressure of the first press 31 is adjustable, and the maximum design pressure can be calculated according to the number of the multi-curved surface accommodating grooves 72 on the lower die 7. The pressure can be designed at 80-200 kg per product seed material. In order to reduce the probability of cracking the product seed material, the pressing of the upper plate of the first press 31 can be divided into two stages. First, the upper plate is directly pressed to the first position with the upper die 8, and the first position is 0.5-2 mm larger than the minimum limit position between the upper and lower dies 7. The upper plate stays at the first position for 1-10 seconds, and then continues to be pressed to the minimum limit position of the upper and lower dies 7. Then, the pressure is maintained at this pressure position, and the upper and lower plates continue to be heated. After 30-150 seconds of heating and pressure maintaining, the mold is opened, and the upper plate and the upper die 8 are raised back to the initial position.

[0059] Please refer to Figure 5 The cold pressing device 4 includes a second press 41, an upper cold pressing plate 42, a lower cold pressing plate 43, and an upper die 8. The second press 41 is arranged above the conveying device 6 and downstream of the first press 31. The upper cold pressing plate 42 is fixedly connected to the actuator rod of the first press 31. A plurality of upper dies 8 are fixed to the lower surface of the upper cold pressing plate 42. The lower cold pressing plate 43 is arranged below the lower die 7 opposite to the upper cold pressing plate 42. Cooling pipes are arranged in the upper and lower cold pressing plates 42 and 43, and one of cold water or ethylene glycol is continuously fed into the cooling pipes. The upper cold pressing plate 42 of the second press is pressed together with the upper die 8. Once pressed, the upper die 8 and the lower die 7 are at the minimum limit position. Then, the pressure is maintained, and the upper and lower plates continue to be cooled until the surface temperature of the lower die 7 drops to a set temperature, which is generally 5-20°C, preferably 5°C. The pressure maintaining and cooling time is more than 30-240 seconds. Then, the mold is opened, and the upper cold pressing plate 42 and the upper die 8 are raised.

[0060] Please refer to Figure 6 The blanking device 5 is arranged downstream of the conveying device 6 and includes a second turnover lifting device 51, a hopper 11, and an outfeed conveyor belt 53. The second turnover lifting device 51 is used to turn over the lower die 7 on the upper conveying device 61 and transport the lower die 7 from the upper conveying device 61 to the lower conveying device 62. The hopper 11 is arranged directly below the second turnover lifting device 51 and is used to collect the product seed material that falls off from the lower die 7 after being turned over. The outfeed conveyor belt 53 is arranged below the hopper 11 and is used to transport the product seed material collected by the hopper 11 to the next process. Since the lower die 1 is arranged on the lower conveying device 62 after being turned over by 180°, the multi-curved surface accommodating grooves 72 of the lower die 7 are downward when flowing back, which facilitates the cleaning of the multi-curved surface accommodating grooves 72 by the subsequent cleaning device 9.

[0061] Further, a visual detection module 54 can be arranged on the outer surface of the hopper 11 to monitor the outfeed in real time and detect whether the outfeed is clean.

[0062] The cleaning device 9 is arranged below the lower conveying device 62, and is specifically arranged below the hot pressing device 3, and the cleaning device 9 can automatically spray steam from bottom to top to automatically clean the lower mold 7.

[0063] The preheating chamber 10 is arranged downstream of the lower conveying device 62, and is specifically arranged below the feeding device 1 and the heating device 2, and the preheating chamber 10 is internally provided with an infrared heating instrument and / or high-temperature steam, and is used for preheating the cleaned lower mold 7.

[0064] As shown in Figure 8 , the upper mold 8 is provided with a first air passage 81, one end of the first air passage 81 is connected with compressed air, and the other end is connected with the center of the multi-curved surface pressing block 82. When the upper mold 8 is ready to be opened after pressing, the compressed air can be introduced into the air passage of the upper mold 8, so that the product seed material adhered to the upper mold 8 due to pressure can be blown down, and the product seed material adhered to the upper mold 8 is ensured.

[0065] As shown in Figure 7 , the lower mold 7 is provided with a second air passage 71, one end of the second air passage 71 is connected with the center of the multi-curved surface containing groove 72, the second reversing lifting device is provided with a blowing plate 55, the blowing plate 55 is internally provided with a plurality of air passages matched with the second air passage 71, the other end of the second air passage 71 is connected with the air passages, and the air passages are connected with compressed air, and the blowing plate 55 is further provided with a clamping device 56. When the lower mold 7 is completed after hot pressing and cold pressing, it is transferred to the blowing plate 55 of the second reversing lifting device through the conveying device 6, and is fixed and sealed through the clamping device 56. With the second reversing lifting device being reversed by 180° and being moved downward, the product seed material on the lower mold 7 will be affected by gravity and fall into the hopper, and part of the product seed material adhered to the lower mold 7 will be blown off by introducing compressed air into the air passages of the blowing plate 55.

[0066] It is worth noting that the lower mold 7 and the upper mold 8 are not limited to the structure proposed in the utility model, and any upper and lower structure mold suitable for product seed material and / or food processing and shaping on the market can also be used.

[0067] Specifically, the product seed material is a spherical or ellipsoidal or granular product seed material of high cellulose lignin.

[0068] The utility model also provides a kind of quick and accurate pressing process, applied to a kind of pressing seed system, comprising the following steps:

[0069] S1, loading: the product seed material treated by washing is placed in the lower mold 7, which can be loaded manually or by using existing automatic loading device.

[0070] S2, preheating: start the conveying device 6, transport the lower mold 7 and the product seed material to the heating device 2, preheat the lower mold 7 and the product seed material, the preheating temperature ranges from 80 DEG C to 160 DEG C;

[0071] S3, hot pressing: start the conveying device 6, the conveying device 6 transports the lower mold 7 loaded with the product seed material to the lower side of the upper mold 8 of the hot press and contacts the lower hot pressing plate, starts the first press 31, the upper mold 8 moves downward, cooperates with the lower mold 7 to extrude and pressure-hold the product seed material, and continuously heats the upper hot pressing plate 32 and the lower hot pressing plate of the first press 31, the heating mode of the upper pressing plate and the lower pressing plate is selected from one of hot water, steam and electric heating, the temperature ranges from 85 DEG C to 160 DEG C; wherein the hot pressing process is divided into two stages, the first stage: the upper mold 8 is pressed to the first position, the first position is 0.5-2mm higher than the minimum limit position between the upper mold 8 and the lower mold 7, the upper mold 8 pressure-holds at the first position for 1-10 seconds; the second stage: the upper mold 8 continues to press to the minimum limit position of the upper mold 8 and the lower mold 7, after pressure-holding for 30-150 seconds, the upper pressing plate rises to the initial position, and the hot pressing is completed, and the upper mold 8 moves upward.

[0072] S4, cold pressing: start the conveying device 6, the conveying device 6 transports the lower mold 7 after the hot pressing to the lower side of the upper mold 8 of the cold press and contacts the lower pressing plate; start the cold press, the upper mold 8 moves downward, cooperates with the lower mold 7 to extrude and pressure-hold the product seed material, the pressure-holding time is 30-240 seconds, the temperature of the cooling upper pressing plate and the lower pressing plate ranges from 10 DEG C to 20 DEG C, and the upper pressing plate and the lower pressing plate of the cold press are continuously refrigerated, the cold pressing is completed, and the upper mold 8 moves upward.

[0073] S5, discharging: start the transmission belt, the conveying device 6 transports the lower mold 7 after the cold pressing to the discharging area for discharging, and the lower mold 7 returns to flow;

[0074] S6, cleaning: start the cleaning pump to clean the returned lower mold 7.

[0075] The product seed material is heated to above 80 DEG C by the pressing system, the product seed material is pressed and molded, 2 times of hot pressing and 2 times of cold pressing are carried out, the mold is cooled to 15 DEG C, and then the mold is opened; the out-of-bag rate of the accurate pressed product seed material above the product (good product) is obviously improved, and can reach above 85%.

[0076] The above is the specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can make equivalent replacement or change according to the technical scheme and the conception of the utility model within the technical range disclosed by the utility model, and all of them should be covered in the protection scope of the utility model claim.

Claims

1. A seed pressing system, comprising: a conveying device (6) provided with a plurality of lower molds (7) on the conveying device (6), the upper surface of the lower mold (7) being provided with a plurality of curved surface accommodating grooves matching the shape of the product seed material; an upper feeding device (1) arranged upstream of the conveying device (6); characterized in that it further comprises: a heating device (2) provided with a heating chamber (21) on the heating device (2), the heating chamber (21) being provided with passages at both ends for the conveying device (6) to pass through; a hot pressing device (3) comprising a first pressing machine (31), an upper hot pressing plate (32), a lower hot pressing plate (33) and an upper mold (8), the first pressing machine (31) being arranged above the conveying device (6), the upper hot pressing plate (32) being fixedly connected to the actuator rod of the first pressing machine (31), the plurality of upper molds (8) being fixed to the lower surface of the upper hot pressing plate (32), the lower surface of the upper mold (8) being provided with a plurality of curved surface pressing protrusions matching the shape of the product seed material, the plurality of curved surface pressing protrusions being matched with the plurality of curved surface accommodating grooves, the lower hot pressing plate being arranged below the lower mold (7) opposite to the upper hot pressing plate (32); a cold pressing device (4) comprising a second pressing machine (41), an upper cold pressing plate (42), a lower cold pressing plate (43) and an upper mold (8), the second pressing machine (41) being arranged above the conveying device (6) and downstream of the first pressing machine (31), the upper cold pressing plate (42) being fixedly connected to the actuator rod of the first pressing machine (31), the plurality of upper molds (8) being fixed to the lower surface of the upper cold pressing plate (42), the lower cold pressing plate (43) being arranged below the lower mold (7) opposite to the upper cold pressing plate (42); a lower feeding device arranged downstream of the conveying device (6).

2. A seed pressing system according to claim 1, characterized in that: It further comprises a cleaning device (9) arranged below the conveying device (6).

3. A seed pressing system according to claim 1, characterized in that: The conveying device (6) comprises an upper conveying device (61) and a lower conveying device (62), the conveying directions of the upper conveying device (61) and the lower conveying device (62) being opposite; further preferably, a preheating chamber (10) is arranged downstream of the lower conveying device (62).

4. The seed pressing system of claim 1, wherein: The upper mold (8) is provided with a first air passage (81), one end of the first air passage (81) being connected to compressed air, and the other end being connected to the center of the plurality of curved surface pressing protrusions (82).

5. The seed pressing system of claim 1, wherein: The upper feeding device (1) comprises a first turnover lifting device (11) and an automatic feeding equipment (12), the first turnover lifting device (11) being arranged at the upstream port of the conveying device (6), and the automatic feeding equipment (12) being arranged above the conveying device (6).

6. A seed pressing system according to claim 1, characterized in that: The upper hot pressing plate (32) and the lower hot pressing plate (33) are provided with heating pipes; the upper cold pressing plate (42) and the lower cold pressing plate (43) are provided with cooling pipes.

7. The seed pressing system of claim 1, wherein: The blanking device (5) comprises a second turnover lifting device (51), a hopper (52) and a discharging conveyor (53), the second turnover lifting device (51) is arranged at the downstream port of the conveying device (6); the hopper (52) is arranged directly below the second turnover lifting device (51); and the discharging conveyor (53) is arranged below the hopper (52).

8. A seed pressing system according to claim 7, characterized in that: The lower die (7) is provided with a second air passage (71), one end of the second air passage (71) is connected to compressed air, and the other end is connected to the center of a multi-curved surface accommodating groove (72); the second turnover lifting device (51) is provided with a blowing plate (55), the blowing plate (55) is provided with a plurality of air channels matched with the second air passage (71), and the air channels are connected to compressed air; and the blowing plate (55) is further provided with a clamping device (56).

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