Pine nut precision opening process and opening machine thereof

Abstract

This invention relates to the field of pine nut opening device technology, and discloses a precise pine nut opening process and its opening machine. The process involves selecting uniformly sized pine nuts as raw materials, cleaning the pine nuts to remove surface dirt and residue, soaking the cleaned pine nuts evenly in a container with an appropriate amount of water, roasting the pine nuts while paying attention to the degree of roasting, and removing them when they are half-cooked. The half-cooked pine nuts are then laid flat with their tips facing the same direction, and the tips are dried and heated while the wide ends of the pine nuts are kept moist. The tips of the pine nuts are then tapped to open them. After tapping, the entire pine nut is dried and heated. The dried and opened pine nuts are then collected for the next batch of drying and opening.

Description

Technical Field

[0001] This invention relates to the field of pine nut opening device technology, specifically to a precise pine nut opening process and its opening machine. Background Technology

[0002] Pine nuts are processed by harvesting them from mature pine cones, then screening them to remove impurities and substandard products. Next, suitable drying techniques are used to remove excess moisture. Due to the high price of pine nuts and the difficulty of automated screening, manual intervention is often used in the processing to ensure quality. People have two preferences for processed pine nuts: raw pine nuts, which have a fresh and delicious taste, and roasted pine nuts, which have a richer and more aromatic flavor after being cooked at high temperatures. In the latter case, the outer shell of the pine nuts becomes crispier and can be easily cracked open with a bite or a gentle squeeze, making them convenient to eat. Because of this characteristic, people often use high-temperature processing methods such as roasting to open many pine nuts, creating open-shell pine nut products for easy consumption. However, current open-shell pine nut products all use a fully cooked process, which means that open-shell pine nuts only have the rich aroma of high-temperature processing and cannot retain the fresh and delicious taste of pine nuts.

[0003] Furthermore, the optimal state for opening pine nuts is that the tip of the pine nut is open about halfway. Too little opening makes them difficult to bite open, while too much opening makes them prone to completely splitting apart during processing. However, existing pine nut opening processing technology usually processes pine nuts together. Since each pine nut is in a different state, the same process during pine nut processing will result in different opening states for pine nuts of different quality. This makes it difficult to maintain a consistent opening state for the final pine nut, and may also produce a large number of unopened or completely cracked pine nuts. This greatly affects the appearance of the pine nut processing and requires special equipment to remove them during processing, which increases production costs. At the same time, some of the opened pine nuts have poor openings, making them more difficult to bite open. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the existing technology, the present invention provides a pine nut precision opening process and its opening machine, which has the advantages of directional drying and precise opening of pine nuts, and solves the problem of stable opening position and size of pine nuts.

[0005] (II) Technical Solution: To achieve the above-mentioned purpose of directional drying and precise opening of pine nuts, the present invention provides the following technical solution: A process for precise opening of pine nuts: Step 1: Select dry, insect-free, undamaged, and mold-free pine nuts as raw materials to ensure that the pine nuts are of uniform size for easy subsequent processing. Use cleaning equipment to clean the pine nuts to remove surface dirt and residues. Place the cleaned pine nuts into a container containing an appropriate amount of water for soaking. During the soaking process, stir the pine nuts in a timely manner to ensure that they are evenly moistened.

[0006] Step 2: Roast the pine nuts. During the roasting process, it is important to control the humidity of the pine nuts to avoid them cracking prematurely due to low humidity. Also, pay attention to the doneness; remove the pine nuts when they are half-cooked.

[0007] Step 3: Place the semi-cooked pine nuts onto the opening machine. Spread the pine nuts out manually and fix their position with a device. After fixing, the pine nuts are dried in a directional manner. The front half of the pine nuts is dried and heated so that the humidity of the front half of the pine nuts is lower than that of the back half, and the temperature of the tip of the pine nuts is higher. This creates a temperature and humidity difference, making it easier for the tip of the pine nuts to open and preventing the opening from spreading to the wider end with higher humidity.

[0008] Step 4: Tap the tips of the pine nuts to ensure that all the pine nuts are opened, reducing the number of unopened pine nuts. After tapping, dry and heat the pine nuts to reduce moisture and process them to the appropriate degree of ripeness. Workers collect the dried and opened pine nuts for the next batch of drying and opening.

[0009] A pine nut opening machine for a precise pine nut opening process includes an opening device and a control device. The control device is located next to the opening device. The opening device has a first placement plate on its top and is capable of vibration. The first placement plate has a slot that can hold the pine nut, allowing the pine nut to point downwards, with its front half located below the first placement plate. Below the first placement plate is a cavity, and one side wall of the cavity forms the side of the control device. The control device has a drying component and a guide rail on its side inside the cavity. The guide rail has a base plate without any through holes, and a driving device is located below it, allowing the base plate to move vertically below the first placement plate. The drying component can dry and heat the portion of the pine nut located below the first placement plate.

[0010] Preferably, the control device has an air outlet on its side that can dry the wide end of the pine nuts above the first placement plate.

[0011] Preferably, a second placement plate is provided between the first placement plate and the base plate. The second placement plate has a slot, and the position of the slot on the second placement plate corresponds to the slot on the first placement plate. The size of the slot on the second placement plate is smaller than that of the slot on the first placement plate.

[0012] Preferably, the drying component is a microwave emitting device that emits microwaves to heat and dry the pine nuts, and the first placement plate is made of metal and the bottom plate is made of glass.

[0013] Preferably, the drying component is an airflow nozzle that can spray hot airflow onto the pine nuts for heating and drying.

[0014] Preferably, the side of the groove is provided with an arc-shaped recess.

[0015] Preferably, the bottom plate is provided with a top block, the top block being positioned corresponding to the slot on the first placement plate, so that when the bottom plate moves upward, the top block is located on both sides of the tip of the pine nut.

[0016] (III) Beneficial Effects: Compared with the prior art, the present invention provides a pine nut precision opening process and its opening machine, which has the following beneficial effects: 1. The pine nut precision opening process, by fixing the pine nut and heating its tip, allows the heat to act directly on the tip area that needs the most heating, avoiding heat waste and unnecessary energy dispersion. Due to the direct and concentrated heat source acting on the tip, the pine nut shell and kernel in this area will expand rapidly, generating greater thermal stress. When this stress accumulates in the tip area and exceeds the tensile strength of the pine nut shell, a precise opening will be formed. In contrast, the wide end, due to its higher humidity and lack of direct heat source action, has a lower stress level and will not cause crack propagation, thus maintaining the precision of the opening. It achieves differentiated drying of the tip and wide end of the pine nut. The tip area is dried quickly to promote opening, while the wide end maintains a certain humidity. This humidity difference is beneficial to maintaining the overall quality and taste of the pine nut, and makes the opening of the pine nut concentrated at the tip of the pine nut, and the degree of opening is not too large, avoiding the entire pine nut shell from cracking and affecting the appearance of the pine nut. The similar degree of opening of the pine nut improves the product appearance and increases market competitiveness.

[0017] 2. The precision pine nut opening process and its opening machine, through the up-and-down movement of the base plate, not only gently taps the tip of the pine nut but also serves as a physical aid. This tapping helps to further promote the formation of the tip opening, especially for pine nuts that are difficult to open naturally due to thick shells or tightly packed kernels. At the same time, it pushes out the pine nuts located in the slot, resulting in a higher degree of automation and making it easier for workers to collect them. Pushing the pine nuts out from below helps to better maintain their integrity and reduces the breakage of the pine nut shells when they are taken out of the slot.

[0018] 3. This precise pine nut opening process and its opening machine utilizes a slot on the second placement plate that corresponds to the slot on the first placement plate, but is smaller. This design ensures that when the pine nuts fall from the first placement plate, they are further caught by the slot on the second placement plate, achieving dual positioning and stability. This helps ensure that the pine nuts maintain a fixed posture during drying and tapping, preventing vibration or movement from affecting the opening effect. Because a certain space is formed between the second and first placement plates, this space can serve as a channel for the drying airflow, allowing the hot air generated by the drying components to pass through this space more evenly. The air is evenly blown onto the tip of the pine nuts, further improving drying efficiency and effectiveness. At the same time, the presence of the second placement plate reduces heat loss during the drying process, allowing the heat energy to be more concentrated on the pine nuts. When the bottom plate moves up and down, it not only taps the pine nuts on the first placement plate but also transmits the force through the second placement plate. Because the groove size of the second placement plate is smaller, it can fit more tightly to the tip of the pine nuts, thereby generating greater local stress during tapping. This increase in local stress helps to promote the formation of the tip opening, especially for pine nuts with thicker shells or denser kernels.

[0019] 4. This precise pine nut opening process and its opening machine utilize the high efficiency of microwave heating to enable pine nuts to reach the required drying temperature in a short time, thereby shortening drying time and improving production efficiency. The uniformity of microwave heating ensures that the pine nuts are heated evenly throughout, avoiding quality problems caused by localized overheating. At the same time, microwave heating can also promote the rapid evaporation of internal moisture in the pine nuts, which is conducive to forming a more ideal opening effect. The metal placement plate and base plate act as shielding in the microwave field, preventing potential hazards to equipment and personnel caused by microwave leakage. In addition, they can withstand the effects of high temperature and microwave radiation, ensuring the stability and safety of the equipment.

[0020] 5. This precise pine nut opening process and its opening machine utilizes the double-row linear vortices with opposite rotational directions and regular arrangement formed by the airflow passing over both sides of the pine nuts, as well as the further formation of a Karman vortex street. The strong airflow disturbance and extended contact time ensure more uniform heating of the pine nuts, avoiding localized overheating or under-drying. This helps maintain the overall quality and taste of the pine nuts, enhancing the product's market competitiveness. Due to the airflow disturbance and extended contact time, the pine nuts can more fully absorb the heat from the airflow, thereby accelerating the drying speed. This not only shortens the drying time but also improves drying efficiency, allowing the pine nuts to reach the required degree of dryness in a shorter time. As the drying efficiency is improved, the energy consumption required by the equipment during the drying process is reduced, which not only helps reduce production costs but also conforms to the environmental protection concept of energy conservation and emission reduction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the control device of the present invention.

[0023] Figure 3 This is a cross-sectional view of the present invention. Figure 1 .

[0024] Figure 4 This is a cross-sectional view of the present invention. Figure 2 .

[0025] Figure 5 This is a cross-sectional view of the present invention. Figure 3 .

[0026] Figure 6 This is a schematic diagram of gas flow according to the present invention.

[0027] Figure 7 This is a schematic diagram of the base plate of the present invention.

[0028] In the figure: 1. Opening device; 2. Control device; 11. First placement plate; 12. Second placement plate; 13. Base plate; 21. Air outlet; 22. Drying component; 23. Guide rail; 111. Slot; 131. Top block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1-4A pine nut precision opening process and its opening machine, including an opening device 1 and a control device 2, wherein the control device 2 is located next to the opening device 1. The opening device 1 has a first placement plate 11 on its top and the opening device 1 itself can generate vibration. The first placement plate 11 has a slot 111 that can hold the pine nut, so that the pine nut tip is downward and the front half is located below the first placement plate 11. The first placement plate 11 has a cavity below it, and one side wall of the cavity is the side of the control device 2. The control device 2 has a drying component 22 and a guide rail 23 on the side of the cavity. The guide rail 23 has a base plate 13 with no through holes and a driving device below it, so that the base plate 13 can move up and down below the first placement plate 11. The drying component 22 can dry and heat the part of the pine nut located below the first placement plate 11. The control device 2 has an air outlet 21 on its side that can dry the wide end of the pine nut above the first placement plate 11.

[0031] Workers pour semi-cooked and moistened pine nuts onto the first placement plate 11 of the opening device 1. The opening device 1 itself vibrates, leveling the pine nuts. During vibration, the pointed ends of the pine nuts enter the slots 111 on the first placement plate 11, causing the pine nuts to stand upside down. (See reference...) Figure 3 The front half of the pine nut is submerged below the first placement plate 11, while the rear half is positioned above it. The control device 2 is equipped with a drying component 22, capable of drying the front half of the pine nut located below the first placement plate 11. When heated, the pine nut shell and kernel undergo physical changes, particularly thermal expansion and contraction. When the tip of the pine nut is exposed to heat, the shell and kernel in that area expand rapidly. Since the tip is the primary heated area, its expansion is greater than that of the less heated or unheated tail section. This uneven expansion generates stress at the tip. When the stress exceeds the tensile strength of the pine nut shell, an opening forms at the tip. However, because the tail section has higher humidity and is not directly exposed to heat, its stress level is relatively low and insufficient to trigger crack propagation. Therefore, the crack... The cracks remain in the tip area and do not spread to the wide end. The base plate 13, located below the first placement plate 11, begins to move. The base plate 13 is set on the guide rail 23 and can move up and down to tap the tip of the pine nut, reducing the number of unopened pine nuts. The air outlet 21 on the control device 2 dries the wide end of the pine nut. While drying the tip, the wide end is also dried, but at a slower speed than the tip, to avoid the overall humidity of the pine nut being too high, while keeping the humidity of the wide end higher than that of the tip. After the pine nut is dried, the base plate 13 moves upward to the top to push the pine nut out of the slot 111. After pushing it out, the base plate maintains its height to prevent the pine nuts from falling back into the slot 111 when the workers are collecting the pine nuts on the first placement plate 11, which would increase the workers' collection burden and improve work efficiency.

[0032] A second placement plate 12 is provided between the first placement plate 11 and the base plate 13. The second placement plate 12 has a slot 111, and the position of the slot 111 on the second placement plate 12 corresponds to the slot 111 on the first placement plate 11. The size of the slot 111 on the second placement plate 12 is smaller than that of the slot 111 on the first placement plate 11.

[0033] The slot 111 on the second placement plate 12 corresponds to the slot 111 on the first placement plate 11, but is smaller. This design allows the pine nuts to be further caught by the slot 111 on the second placement plate 12 when they fall from the first placement plate 11, thus achieving dual positioning and stability of the pine nuts. This helps ensure that the pine nuts maintain a fixed posture during drying and tapping, and will not affect the opening effect due to vibration or movement. Since a certain space is formed between the second placement plate 12 and the first placement plate 11, this space can serve as a channel for drying airflow. The hot air generated by the drying component 22 can be blown more evenly to the tip of the pine nuts through this space, further improving the drying efficiency and effect. It also allows for adjustment of the drying temperature in both channels, making the temperature changes more diverse to suit different pine nuts and different opening requirements.

[0034] The drying assembly 22 is a microwave emitting device that emits microwaves to heat and dry the pine nuts. The first placement plate 11 is made of metal, and the base plate 13 is made of glass. The microwave emitting device can directly emit microwaves to the pine nuts. The microwaves penetrate the shell and act directly on the kernel and moisture inside the pine nuts, causing rapid vibration and friction between molecules, thereby generating heat. This heating method is very efficient and can quickly raise the internal temperature of the pine nuts to achieve the purpose of drying. Microwave heating has the characteristic of strong penetration and can heat the pine nuts evenly. The glass base plate 13 allows microwaves to penetrate, reducing the limitation of the drying assembly position. Compared with traditional hot air drying, microwave heating can avoid the situation where heat accumulates on the surface of the pine nuts while the inside is not yet dried, making the pine nuts more evenly heated. The first placement plate 11 is made of metal, and these metal plates play a role in shielding and reflecting in the microwave field. They can prevent microwaves from directly penetrating and heating other parts of the equipment or pine nuts.

[0035] See Figure 5 The groove 111 has an arc-shaped recess on its side, which allows the tip of the pine nut to enter the groove 111 better along the arc surface.

[0036] See Figure 7The bottom plate 13 is provided with a top block 131, and the top block 131 is positioned corresponding to the slot 111 on the first placement plate 11, so that when the bottom plate 13 moves upward, the top block 131 is located on both sides of the tip of the pine nut.

[0037] Example 2: Please refer to Figures 1-4 A pine nut precision opening process and its opening machine, including an opening device 1 and a control device 2, wherein the control device 2 is located next to the opening device 1. The opening device 1 has a first placement plate 11 on its top and the opening device 1 itself can generate vibration. The first placement plate 11 has a slot 111 that can hold the pine nut, so that the pine nut tip is downward and the front half is located below the first placement plate 11. The first placement plate 11 has a cavity below it, and one side wall of the cavity is the side of the control device 2. The control device 2 has a drying component 22 and a guide rail 23 on the side of the cavity. The guide rail 23 has a base plate 13 with no through holes and a driving device below it, so that the base plate 13 can move up and down below the first placement plate 11. The drying component 22 can dry and heat the part of the pine nut located below the first placement plate 11. The control device 2 has an air outlet 21 on its side that can dry the wide end of the pine nut above the first placement plate 11.

[0038] Workers pour semi-cooked and moistened pine nuts onto the first placement plate 11 of the opening device 1. The opening device 1 itself vibrates, leveling the pine nuts. During vibration, the pointed ends of the pine nuts enter the slots 111 on the first placement plate 11, causing the pine nuts to stand upside down. (See reference...) Figure 3The front half of the pine nut is submerged below the first placement plate 11, while the rear half is positioned above it. The control device 2 is equipped with a drying component 22, capable of drying the front half of the pine nut located below the first placement plate 11. When heated, the pine nut shell and kernel undergo physical changes, particularly thermal expansion and contraction. When the tip of the pine nut is exposed to heat, the shell and kernel in that area expand rapidly. Since the tip is the primary heated area, its expansion is greater than that of the less heated or unheated tail section. This uneven expansion generates stress at the tip. When the stress exceeds the tensile strength of the pine nut shell, an opening forms at the tip. However, because the tail section has higher humidity and is not directly exposed to heat, its stress level is relatively low and insufficient to trigger crack propagation. Therefore, the crack... The cracks remain in the tip area and do not spread to the wide end. The base plate 13, located below the first placement plate 11, begins to move. The base plate 13 is set on the guide rail 23 and can move up and down to tap the tip of the pine nut, reducing the number of unopened pine nuts. The air outlet 21 on the control device 2 dries the wide end of the pine nut. While drying the tip, the wide end is also dried, but at a slower speed than the tip, to avoid the overall humidity of the pine nut being too high, while keeping the humidity of the wide end higher than that of the tip. After the pine nut is dried, the base plate 13 moves upward to the top to push the pine nut out of the slot 111. After pushing it out, the base plate maintains its height to prevent the pine nuts from falling back into the slot 111 when the workers are collecting the pine nuts on the first placement plate 11, which would increase the workers' collection burden and improve work efficiency.

[0039] A second placement plate 12 is provided between the first placement plate 11 and the base plate 13. The second placement plate 12 has a slot 111, and the position of the slot 111 on the second placement plate 12 corresponds to the slot 111 on the first placement plate 11. The size of the slot 111 on the second placement plate 12 is smaller than that of the slot 111 on the first placement plate 11.

[0040] The slot 111 on the second placement plate 12 corresponds to the slot 111 on the first placement plate 11, but is smaller. This design allows the pine nuts to be further caught by the slot 111 on the second placement plate 12 when they fall from the first placement plate 11, thus achieving dual positioning and stability of the pine nuts. This helps ensure that the pine nuts maintain a fixed posture during drying and tapping, and will not affect the opening effect due to vibration or movement. Since a certain space is formed between the second placement plate 12 and the first placement plate 11, this space can serve as a channel for drying airflow. The hot air generated by the drying component 22 can be blown more evenly to the tip of the pine nuts through this space, further improving the drying efficiency and effect. It also allows for adjustment of the drying temperature in both channels, making the temperature changes more diverse to suit different pine nuts and different opening requirements.

[0041] See Figure 6 The drying component 22 is an airflow nozzle that sprays hot airflow onto the pine nuts for heating and drying. As the airflow passes over both sides of the pine nuts, it periodically releases double rows of linear vortices with opposite rotation directions and regular arrangement. After nonlinear interaction, these linear vortices form a Karman vortex street. The irregular movement of the vortex increases the contact time between the pine nuts and the airflow, improving the drying and heating efficiency. This disturbance not only increases the mixing degree of the airflow but also makes the heat in the airflow more evenly transferred to the surface of the pine nuts. The irregular movement of the vortex extends the contact time between the pine nuts and the airflow. In traditional airflow drying methods, the airflow may directly sweep across the surface of the pine nuts, resulting in a short contact time and insufficient heat transfer. However, the formation of the Karman vortex street creates a complex flow field around the pine nuts, thereby increasing the opportunity and time for heat exchange. Due to the airflow disturbance and the extended contact time, the pine nuts can more fully absorb the heat in the airflow, thereby accelerating the drying speed. This not only shortens the drying time but also improves the drying efficiency, allowing the pine nuts to reach the required degree of drying in a shorter time.

[0042] See Figure 5 The groove 111 has an arc-shaped recess on its side, which allows the tip of the pine nut to enter the groove 111 better along the arc surface.

[0043] See Figure 7 The bottom plate 13 is provided with a top block 131, and the top block 131 is positioned corresponding to the slot 111 on the first placement plate 11, so that when the bottom plate 13 moves upward, the top block 131 is located on both sides of the tip of the pine nut.

[0044] Working Principle: During the processing of pine nuts, especially the roasting stage, they are subjected to high temperatures. These high temperatures cause the internal moisture of the pine nuts to evaporate rapidly, while the oils expand. Due to the difference in thermal expansion coefficients between the outer shell and the internal substances, the outer shell gradually cracks under internal pressure. Workers pour the semi-cooked and moistened pine nuts onto the first placement plate 11 of the opening device 1. The opening device 1 itself vibrates, leveling the nuts. Simultaneously, during vibration, the pointed ends of the pine nuts enter the slots 111 on the first placement plate 11, causing the pine nuts to stand upside down. (See reference...) Figure 3The front half of the pine nut is submerged below the first placement plate 11, while the rear half is positioned above it. The control device 2 is equipped with a drying component 22, capable of drying the front half of the pine nut located below the first placement plate 11. When heated, the pine nut shell and kernel undergo physical changes, particularly thermal expansion and contraction. When the tip of the pine nut is exposed to heat, the shell and kernel in that area expand rapidly. Since the tip is the primary heated area, its expansion is greater than that of the less heated or unheated tail section. This uneven expansion generates stress at the tip. When the stress exceeds the tensile strength of the pine nut shell, an opening forms at the tip. However, because the tail section has higher humidity and is not directly exposed to heat, its stress level is relatively low and insufficient to trigger crack propagation. Therefore, the crack... The cracks remain in the tip area and do not spread to the wide end. The base plate 13, located below the first placement plate 11, begins to move. The base plate 13 is set on the guide rail 23 and can move up and down to tap the tip of the pine nut, reducing the number of unopened pine nuts. The air outlet 21 on the control device 2 dries the wide end of the pine nut. While drying the tip, the wide end is also dried, but at a slower speed than the tip, to avoid the overall humidity of the pine nut being too high, while keeping the humidity of the wide end higher than that of the tip. After the pine nut is dried, the base plate 13 moves upward to the top to push the pine nut out of the slot 111. After pushing it out, the base plate maintains its height to prevent the pine nuts from falling back into the slot 111 when the workers are collecting the pine nuts on the first placement plate 11, which would increase the workers' collection burden and improve work efficiency.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision opening process for pine nuts, characterized by: Step 1: Select uniformly sized pine nuts as raw materials. Wash the pine nuts to remove surface dirt and residue. Soak the washed pine nuts evenly in a container with an appropriate amount of water. Step 2: Roast the pine nuts, paying attention to the doneness. Remove them when they are half-cooked. Step 3: Spread the half-cooked pine nuts flat, ensuring the pointed ends face the same direction. Dry and heat the pointed ends, while keeping the wider ends moist. Step 4: Tap the pointed ends of the pine nuts to open them. After tapping, dry the entire pine nut. After the pine nuts have been dried and opened, they are collected for the next batch of drying and opening. The pine nut opening machine used in steps three and four includes an opening device (1) and a control device (2). The control device (2) is located next to the opening device (1). The opening device (1) has a first placement plate (11) on top and the opening device (1) itself can vibrate. The first placement plate (11) has a slot (111) that can hold the pine nuts, so that the pine nuts can point downwards and the front half is located under the first placement plate (11). In this configuration, the first placement plate (11) has a cavity below it, and one side wall of the cavity is the side of the control device (2). The control device (2) is equipped with a drying assembly (22) and a guide rail (23) on the side of the cavity. The guide rail (23) is equipped with a base plate (13), and a driving device is provided below the base plate (13) so that the base plate (13) can move up and down below the first placement plate (11). The drying assembly (22) can dry and heat the part of the pine nuts located below the first placement plate (11). The side of the placement (2) is provided with an air outlet (21) that can dry the wide end of the pine nuts above the first placement plate (11); a second placement plate (12) is provided between the first placement plate (11) and the bottom plate (13). The second placement plate (12) is provided with a slot (111), and the position of the slot (111) on the second placement plate (12) corresponds to the slot (111) on the first placement plate (11). The size of the slot (111) on the second placement plate (12) is smaller than that of the slot (111) on the first placement plate (11).

2. A precise opening process of pine nuts according to claim 1, characterized in that: The drying component (22) is a microwave emitting device that can emit microwaves to heat and dry pine nuts. The first placement plate (11) is made of metal and the bottom plate (13) is made of glass.

3. A precise opening process of pine nuts according to claim 1, characterized in that: The drying component (22) is an airflow nozzle that can spray hot airflow onto pine nuts for heating and drying.

4. The precise pine nut opening process according to claim 1, characterized in that: The groove (111) has an arc-shaped recess on its side.

5. The precise pine nut opening process according to claim 1, characterized in that: The bottom plate (13) is provided with a top block (131), and the top block (131) is positioned in a manner corresponding to the slot (111) on the first placement plate (11), so that when the bottom plate (13) moves upward, the top block (131) is located on both sides of the tip of the pine nut.

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