Fruit vacuum packaging processing method, separated packaging mold and vacuum packaging machine

Abstract

The invention discloses a vacuum packaging processing method for fruits. The vacuum packaging processing method comprises the steps of screening, selecting a film body and a mold, heating a bottom film to be attached to the mold, filling, vacuum packaging, heat sealing and the like, wherein the filling is that the fruits are placed on a separated packaging mold in a mode that single bodies are mutually spaced. According to the vacuum packaging device, the fruits are subjected to vacuum packaging in the mode that the single fruits are mutually spaced, and different from the mode that the fruits are subjected to vacuum packaging after being placed in a concentrated mode in the prior art, the situation that fruit skins are broken due to extrusion, accumulation and friction among the fruits in the vacuumizing process is reduced; according to the fruit vacuum packaging processing method, the packaging problems of fruit juice loss, deformation, serious browning and the like after packaging are effectively solved, and based on the fruit vacuum packaging processing method, the invention further discloses a separated type packaging mold and a vacuum packaging machine which are used for achieving the fruit vacuum packaging processing method.

Description

Technical Field

[0001] The present application relates to the technical field of fruit processing and packaging, and in particular to a fruit vacuum packaging processing method, a partitioned packaging mold and a vacuum packaging machine. Background Art

[0002] In the process of fruit processing and storage, the use of vacuum packaging technology is an effective means of preservation. It can significantly reduce the risk of food contamination, delay the oxidation process, and reduce the quality degradation caused by mechanical damage. Vacuum packaging creates a relatively oxygen-deficient environment by excluding the air in the package, thereby inhibiting the growth and reproduction of microorganisms. This is especially important for perishable fruits because they are still active organisms after picking, and their respiration will accelerate the decay process. In addition, vacuum packaging can effectively prevent the oxidation of nutrients such as oils and vitamins in fruits, maintaining the nutritional value and flavor of fruits. At the same time, since the air in the packaging bag is extracted, the mechanical shock and pressure on the fruit during transportation and handling will be reduced accordingly, which helps to protect the integrity and appearance of the fruit and reduce damage caused by collision and extrusion. Therefore, vacuum packaging not only helps to extend the shelf life of fruits, but also ensures that consumers can enjoy fresher and healthier fruit products.

[0003] Vacuum packaging is currently a widely used technology in the field of fruit processing. However, this packaging method also has some challenges. On the one hand, vacuum packaging may generate greater pressure in the process of extracting air, which may cause the packaging material to be pierced or worn by fruits with thorns or rough surfaces (such as lychees), or for those fruits with softer textures, such as cherry tomatoes and bayberries, they are more likely to be damaged during the packaging process; on the other hand, during the vacuuming process, the fruits may be squeezed against each other due to changes in pressure in the packaging bag. This squeezing may cause damage to the surface of the fruit, affecting its appearance and quality; in addition, the vacuum packaging process may require precise operation and control to ensure the sealing and vacuum degree of the packaging, which may increase the complexity and processing time of the processing process, and to a certain extent increase costs and reduce economic benefits. Summary of the invention

[0004] In view of the problem in the prior art that the fruit skin is easily pierced, worn and squeezed during the vacuum packaging process of fruits, which affects the fruit packaging quality, the present invention discloses a fruit vacuum packaging processing method for vacuum packaging the fruits at intervals. Based on the method, the present invention also discloses a partitioned packaging mold and a vacuum packaging machine.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fruit vacuum packaging processing method, comprising:

[0007] Screen the target range of fruits and pre-process them;

[0008] Selecting a partitioned packaging mold, a bottom film and a top film, wherein the partitioned packaging mold is provided with a plurality of receiving grooves; heating the bottom film and evacuating the bottom film so that the bottom film fits the receiving grooves;

[0009] Filling the fruits so that each of the fruits is located in one of the containing grooves; the bottom film is located between the fruits and the partitioned packaging mold;

[0010] Covering the top film onto the bottom film and the fruit, and applying vacuum to make the top film and the bottom film adhere to the fruit;

[0011] The top film is heated to adhere to the bottom film and seal the fruit.

[0012] Furthermore, the target range is: the diameter difference is within 2 mm; or the mass difference is within 6 grams.

[0013] Furthermore, selecting a partitioned packaging mold includes: selecting a partitioned packaging mold with a specified receiving groove diameter, so that the receiving groove diameter is equal to the maximum value of the fruit diameter in the target range.

[0014] Furthermore, heating the bottom film and evacuating the bottom film so that the bottom film fits the receiving groove specifically includes:

[0015] The vacuuming time lasts 2 to 5 seconds; the bottom film heating time lasts 1 to 2 seconds;

[0016] The heating temperature is 90 to 100 degrees Celsius.

[0017] Furthermore, the step of vacuuming so that the top film and the bottom film are attached to the fruit specifically includes:

[0018] Vacuuming time:

[0019]

[0020] Where t is the vacuum time, V is the volume of the container during vacuum, S m is the effective pumping speed of the mechanical pump on the container, P0 is the initial pressure in the container, P is the final pressure, and P m is the ultimate vacuum degree of the pump.

[0021] Furthermore, the termination pressure is less than 200Pa.

[0022] Further, heating the top film so that the top film and the bottom film adhere to each other and seal the fruit specifically includes:

[0023] The heating temperature is 100 to 110 degrees Celsius; the heating time is 2 to 4 seconds.

[0024] Furthermore, after heating the top film so that the top film and the bottom film adhere to each other and seal the fruit, the method further comprises:

[0025] The top film and the bottom film are cut to form a plurality of fruit packaging finished products.

[0026] A partitioned packaging mold comprises: a body, and a plurality of receiving grooves arranged on the body; the receiving grooves are hemispherical and have the same diameter;

[0027] When the partitioned packaging mold is used for vacuum packaging of fruits, the vacuum packaging processing method for fruits as described above is realized.

[0028] A vacuum packaging machine, comprising: a conveying device, a vacuum container, a vacuum pump, a controller, a heating device and a cutting device;

[0029] The conveying device is used to transport the fruit, the bottom film and the top film to the partitioned packaging mold;

[0030] The controller is used to turn on or off the heater and the vacuum pump;

[0031] The vacuum pump and the heater are connected to the vacuum container to adjust the temperature and pressure in the vacuum container;

[0032] The cutting device is used to cut the top film and the bottom film;

[0033] When the vacuum packaging machine is in operation, the fruit vacuum packaging processing method described in any one of the above items is implemented.

[0034] The beneficial effects of the present invention are:

[0035] The fruit vacuum packaging processing method disclosed by the present invention places the fruits at intervals before vacuum packaging, thereby reducing the damage and cracking of fruits caused by mutual squeezing between fruits due to vacuum extraction, and reducing the influence of vacuum extraction on the appearance and quality of fruits; the fruit interval packaging can also effectively reduce the air residue around the fruits after packaging, which not only reduces the problems of damage, leakage and browning caused by fruit packaging, but also increases the antiseptic effect of fruits and prolongs the storage time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1It is a schematic diagram of the workflow of the present invention;

[0038] Figure 2 It is a cutting plane schematic diagram of the cutting process of the present invention for making the fruit packaging finished product;

[0039] Figure 3 It is a three-dimensional structural schematic diagram of the partitioned packaging mold disclosed in the present invention;

[0040] Figure 4 It is a schematic diagram of the structural connection relationship of the vacuum packaging machine disclosed in the present invention.

[0041] in:

[0042] 1. Main body; 2. Receiving slot. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] Please refer to Figure 1 The fruit vacuum packaging processing method disclosed by the present invention comprises:

[0047] S1, screening: screening the target range of fruits and pre-processing;

[0048] S2, determining the packaging material: selecting a partitioned packaging mold, a bottom film and a top film, wherein the partitioned packaging mold is provided with a plurality of receiving grooves; heating the bottom film and evacuating the bottom film so that the bottom film fits the receiving grooves;

[0049] S3, filling: filling the fruits so that each of the fruits is located in one of the containing grooves; the bottom film is located between the fruits and the partitioned packaging mold;

[0050] S4, vacuuming: covering the top film onto the bottom film and the fruit, and vacuuming so that the top film and the bottom film adhere to the fruit;

[0051] S5, packaging: heating the top film so that the top film adheres to the bottom film and seals the fruit.

[0052] In the above steps, the purpose of screening is mainly to make the product quality of the same batch of fruit products within the same range, so as to facilitate unified management and classification during subsequent production, processing, transportation and sales. When packaging, the main consideration is to keep the fruits packaged in the same batch within the same size and quality range as much as possible. Fruits of different sizes, qualities and types have different requirements for vacuum packaging pressure, holding tank size, operation time, etc. Screening ensures that the same batch of vacuum packaging requirements are the same during the fruit packaging process, avoiding problems such as fruit rupture and air residue in the packaged products.

[0053] In an achievable embodiment of the present invention, the screening methods include mass and volume:

[0054] The method of quality screening is that the maximum difference in mass of fruits in the same batch is 6g, that is, within the same batch, the mass difference between the largest and smallest monomers does not exceed 6g;

[0055] The method of volume screening is that the maximum difference in diameter of fruits in the same batch is 2mm, that is, within the same batch, the diameter difference between the largest monomer and the smallest monomer does not exceed 2mm.

[0056] During the screening process, the screening can be carried out according to either quality or volume, or the same batch of fruits can be required to meet both quality screening requirements and volume screening requirements.

[0057] The fruit vacuum packaging processing method of the invention is suitable for packaging spherical or ellipsoidal fruits such as litchi, longan, bayberry, apricot, etc., with a single fruit diameter ranging from 20 to 40 mm.

[0058] After screening the fruits for classification, and pre-processing such as washing, color protection, and crispness protection, it is necessary to select the partition packaging mold, top film, and bottom film according to the diameter or quality range of the fruits:

[0059] The specific selection requirement of the partitioned packaging mold is to select a receiving groove that matches the volume of the fruit, so that all fruits packaged in the same batch can be accommodated in the receiving groove; specifically, the diameter of the receiving groove of the partitioned packaging mold is greater than or equal to the maximum diameter of the fruits in the same batch.

[0060] The selection of top film and bottom film is the film thickness, film material and film area. The film area needs to be determined according to the packaging quantity and fruit volume. The film thickness is: preferably 0.15-0.2mm for the top film and 0.3-0.35mm for the bottom film. The top and bottom films are preferably PA / PE composite films. The film of this material combines the strength, wear resistance, barrier properties of nylon materials with the flexibility and heat sealing properties of polyethylene, and has good tensile and compressive properties. At the same time, the film cost is low, which is suitable for food packaging, processing and storage requirements, and has low economic cost.

[0061] After selecting the mold and the film body, the base film is covered on the partition packaging mold, and the partition packaging mold and the base film are placed in a vacuum container. The base film is heated to deform the base film, and vacuum is simultaneously drawn to make the base film completely adhere to the surface of the partition packaging mold (the base film is deformed and adheres to the surface of the receiving groove).

[0062] In a feasible embodiment of the present invention, the vacuuming time is 2 to 5 seconds, the bottom film heating temperature is 90 to 100° C., the heating time is 1 to 2 seconds, and the bottom film molding time is 2 to 4 seconds.

[0063] After the bottom film is attached to the receiving groove, the fruit is filled on the partitioned packaging mold in a manner that each receiving groove contains a single fruit, and the bottom film is located between the fruit and the partitioned packaging mold. Then the top film is covered on the fruit and the bottom film.

[0064] The top film, fruit, bottom film and partitioned packaging mold are placed in a vacuum container, and vacuum is drawn to make the bottom film and top film fit together and wrap the fruit. The specific operation method is:

[0065] Select the vacuum time. The vacuum time is calculated as follows:

[0066] Vacuuming time:

[0067]

[0068] Where t is the vacuum time, V is the volume of the container during vacuum, S m is the effective pumping speed of the mechanical pump on the container, P0 is the initial pressure in the container, P is the final pressure, and P m is the ultimate vacuum degree of the pump.

[0069] In order to ensure that no air remains during the vacuum packaging process, the final pressure is less than 200 Pa.

[0070] Select the heat sealing temperature, the heat sealing temperature is 100-110°C, and the heating time is 2-4s.

[0071] The method further comprises:

[0072] S6, cutting: After the heat sealing is completed, the top film and the bottom film are cut so that a specified number of fruits are located in the same fruit package product. Figure 2 As shown in the figure, it is a top view of the top film or bottom film side, each circle represents a vacuum-packed fruit monomer, and the dotted line is the cutting line. After cutting, each fruit packaged product contains three rows of fruits, and each row contains four fruit monomers.

[0073] Please refer to Figure 3 Based on the above-mentioned fruit vacuum packaging method, the present invention discloses a partitioned packaging mold, comprising: a main body 1, on which a plurality of receiving grooves 2 are arranged. The receiving grooves 2 are hemispherical or hemispherical, and the diameters of each of the receiving grooves 2 are the same. In an achievable embodiment of the present invention, a plurality of packaging areas are arranged on the main body 1, and within a single packaging area, the spacing between adjacent receiving grooves 2 is the same; the spacing between adjacent packaging areas is greater than the spacing between the receiving grooves 2, and this structure facilitates operators to subsequently cut and produce fruit packaged finished products. The partitioned packaging mold is suitable for the above-mentioned fruit vacuum packaging processing method.

[0074] Please refer to Figure 4 , based on the above-mentioned fruit vacuum packaging method, the present invention also discloses a vacuum packaging machine, including: a conveying device, a vacuum container, a vacuum pump, a controller, a heating device and a cutting device;

[0075] The conveying device is used to transport the fruit, the bottom film and the top film to the partitioned packaging mold. In other achievable embodiments of the present invention, in order to facilitate subsequent processing, the conveying device transports the vacuum-packed fruit, the top film and the bottom film as a whole to the cutting device for cutting;

[0076] The controller is used to control the opening, working temperature, working time and closing of the heater; it is also used to control the opening, working power, working time and closing of the vacuum pump;

[0077] The vacuum pump and the heater are connected to the vacuum container to adjust the temperature and pressure in the vacuum container;

[0078] The cutting device is used for cutting the top film and the bottom film to form a finished fruit packaging product.

[0079] In other feasible embodiments of the present invention, the vacuum packaging machine may further be provided with:

[0080] Screening device: used to screen fruit monomers of specified mass and / or volume;

[0081] Cleaning device: used for processing fruit monomers before packaging;

[0082] Filling device: When the fruit is conveyed to the partitioned packaging mold, automatic filling and recycling are realized, so that the process of each fruit being placed in a single receiving slot is automated, and the fruit that cannot be accommodated in the partitioned packaging mold is recycled and prepared for the next filling.

[0083] The above device can be realized by those skilled in the art through existing technology, and the specific structure and diagram are not described in detail in this patent application. When the vacuum packaging machine is working, the fruit vacuum packaging processing method described in any one of the above items is realized.

[0084] The fruit vacuum packaging processing method disclosed by the present invention places the fruits at intervals before vacuum packaging, thereby reducing the damage and cracking of fruits caused by mutual squeezing between fruits due to vacuum extraction, and reducing the influence of vacuum extraction on the appearance and quality of fruits. Compared with the prior art, the present invention can effectively reduce the residual air around the fruits after packaging, which not only reduces the problems of damage, leakage and browning caused by fruit packaging, but also increases the antiseptic effect of fruits and prolongs the storage time.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fruit vacuum packaging processing method, characterized in that: include: Screen the target range of fruits and pre-process them; Selecting a partitioned packaging mold, a bottom film and a top film, wherein the partitioned packaging mold is provided with a plurality of receiving grooves; Heating the bottom film and applying vacuum to make the bottom film fit the receiving groove; Filling the fruits so that each of the fruits is located in one of the containing grooves; the bottom film is located between the fruits and the partitioned packaging mold; Covering the top film onto the bottom film and the fruit, and applying vacuum to make the top film and the bottom film adhere to the fruit; The top film is heated to adhere to the bottom film and seal the fruit.

2. The fruit vacuum packaging processing method according to claim 1, characterized in that: The target range is: the diameter difference is within 2 mm; or the mass difference is within 6 g.

3. The fruit vacuum packaging processing method according to claim 2, characterized in that: Selecting the partitioned packaging mold includes: selecting the partitioned packaging mold with a specified receiving groove diameter, so that the receiving groove diameter is equal to the maximum value of the fruit diameter in the target range.

4. The fruit vacuum packaging processing method according to claim 1, characterized in that: The step of heating the bottom film and applying vacuum to make the bottom film fit the receiving groove specifically includes: The vacuuming time lasts 2 to 5 seconds; the bottom film heating time lasts 1 to 2 seconds; The heating temperature is 90 to 100 degrees Celsius.

5. The fruit vacuum packaging processing method according to claim 1, characterized in that: The step of vacuuming the top film and the bottom film to adhere to the fruit specifically includes: Vacuuming time: Where t is the vacuum time, V is the volume of the container during vacuum, S m is the effective pumping speed of the mechanical pump on the container, P0 is the initial pressure in the container, P is the final pressure, and P m is the ultimate vacuum degree of the pump.

6. The fruit vacuum packaging processing method according to claim 5, characterized in that: The termination pressure is less than 200Pa.

7. The fruit vacuum packaging processing method according to claim 1, characterized in that: Heating the top film so that the top film and the bottom film adhere to each other and seal the fruit specifically comprises: The heating temperature is 100 to 110 degrees Celsius; the heating time is 2 to 4 seconds.

8. The fruit vacuum packaging processing method according to claim 1, characterized in that: The method further comprises heating the top film so that the top film and the bottom film adhere to each other and seal the fruit: The top film and the bottom film are cut to form a plurality of fruit packaging finished products.

9. A partitioned packaging mold, characterized in that: The partitioned packaging mold comprises: a body, and a plurality of receiving grooves arranged on the body; the receiving grooves are hemispherical and have the same diameter; When the partitioned packaging mold is used for vacuum packaging of fruits, the fruit vacuum packaging processing method according to any one of claims 1 to 8 is implemented.

10. A vacuum packaging machine, characterized in that: include: Conveying device, vacuum container, vacuum pump, controller, heating device and cutting device; The conveying device is used to transport the fruit, the bottom film and the top film to the partitioned packaging mold; The controller is used to turn on or off the heater and the vacuum pump; The vacuum pump and the heater are connected to the vacuum container to adjust the temperature and pressure in the vacuum container; The cutting device is used to cut the top film and the bottom film; When the vacuum packaging machine is in operation, the fruit vacuum packaging processing method according to any one of claims 1 to 8 is implemented.

Images