Full-automatic bag type modified atmosphere packaging machine

Abstract

The invention relates to a full-automatic bag type modified atmosphere packaging machine which comprises a machine frame, a gas replacement mechanism is arranged on the machine frame, the gas replacement mechanism comprises a sealing cavity, an inlet flushing pipe and an in-bag flushing pipe, and the gas replacement mechanism is installed on the table top of the machine frame in the mode that the center line of a longitudinal slotting of a forming device is symmetrical. Three inflation ports are formed in the bottom or the side portion of the sealing cavity and used for being filled with gas prepared in advance, two inflation ports are connected with the inlet flushing pipe and the in-bag flushing pipe through hoses respectively, and the other inflation port is an inflation inlet of the sealing cavity; according to the invention, the pre-prepared gas is filled to replace the gas in the sealing cavity, the external air carried by the input material is removed through the inlet flushing pipe, and the gas in the packaging cavity is replaced through the in-bag flushing pipe, so that the replacement rate and the replacement speed of the gas in the package are obviously improved, and the packaging requirement of high-precision gas configuration in the bag can be met.

Description

Technical Field

[0001] The invention relates to the technical field of modified atmosphere packaging production, in particular to a full-automatic bag-type modified atmosphere packaging machine. Background Art

[0002] At present, there are two main types of gas replacement methods for bag-type modified atmosphere packaging machines on the market. One is the vacuum filling method, which first evacuates the packaging bag and then fills it with the configured gas. It has high replacement accuracy, but it is difficult to meet the requirements of high-speed production. The other is the gas flushing method, which flushes the packaging bag with the prepared gas through the air pipe. It can operate continuously, but the gas replacement accuracy in the bag is low, which is difficult to meet the packaging of products with high requirements for modified atmosphere accuracy. Summary of the invention

[0003] In view of the shortcomings of the above-mentioned existing production technologies, the applicant provides a fully automatic bag-type modified atmosphere packaging machine. By arranging a gas replacement mechanism on the frame, pre-prepared gas is flushed into the sealing cavity, the inlet flushing pipe and the bag inflation pipe to fully replace the gas in the packaging bag, thereby realizing high-precision gas regulation and control in the packaging bag and achieving continuous packaging production.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A fully automatic bag-type modified atmosphere packaging machine, comprising a frame, a gas replacement mechanism arranged on the frame, the gas replacement mechanism comprising a sealing chamber, an inlet flushing pipe and an in-bag flushing pipe, the gas replacement mechanism being mounted on the frame table in a symmetrical form about the center line of the longitudinal slot of the former;

[0006] The specific structure of the sealed cavity is as follows:

[0007] The sealing chamber is a rectangular shell, and the shell surface in contact with the frame table is an open structure; the sealing chamber is installed on the frame table in a symmetrical form with respect to the center line of the longitudinal slot of the former, and the traction roller and the longitudinal sealing roller are covered therein; three inflation ports are provided at the bottom or side of the sealing chamber for filling with pre-prepared gas, two of which are connected to the inlet flushing pipe and the bag inlet flushing pipe through hoses, and the other inflation port is the inflation inlet of the sealing chamber, and the continuous inflation of the inflation inlet of the sealing chamber ensures that the gas inside the sealing chamber is always in a positive pressure state relative to the external gas;

[0008] The specific structure of the inlet flushing pipe is as follows:

[0009] The inlet flushing pipe is fixed on the side wall of the sealed cavity near the material feeding line, and its air outlet is located at the front end of the longitudinal groove surface of the former and extends out of the sealed cavity; the inlet flushing pipe and the sealed cavity wall form an angle of 30°-60°, and the angle and the vertical position can be adjusted according to the material size, feeding speed, etc., so as to achieve effective inflation of the inlet of the front section of the former by the inlet flushing pipe, and reduce the external gas that may be brought into the packaging cavity during the material feeding process;

[0010] The specific structure of the flushing tube in the bag is as follows:

[0011] The in-bag flushing pipe is located in the sealing cavity and between the traction roller and the longitudinal sealing roller. Its air outlet is located in the interlayer of two layers of packaging film overlapped by the longitudinal sealing of the former. At the same time, the installation position of the air outlet should not affect the smooth supply of materials in the packaging cavity.

[0012] Its further technical solution is:

[0013] The inlet flushing pipe is a hollow structure, and its cross section is any one of a flat rectangular shape and an arc shape; the long side dimension of the cross section of the inlet flushing pipe is slightly larger than the cross section width of the former;

[0014] The flushing tube in the bag is a hollow structure and is flat as a whole; the cross-section of the flushing tube in the bag is any one of a flat rectangle and an ellipse, and its thickness is smaller than the width of the longitudinal slot of the former.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention has a simple structure. By arranging a sealed cavity and continuously filling it with pre-prepared gas, most of the gas in the packaging cavity can be replaced and the positive pressure in the cavity can be maintained to prevent the entry of external air. Secondly, by arranging an inlet flushing pipe and an in-bag inflation pipe, the influence of the air carried by the material input and the initial residual air at the bottom of the packaging bag on the gas replacement accuracy can be further reduced, thereby ensuring the replacement speed and improving the gas replacement accuracy, and meeting the requirements of modified atmosphere packaging for high-precision configuration of the gas in the bag. The gas replacement mechanism in the present invention is quick and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention in the first working state.

[0018] Figure 2 It is a top view of the present invention in the first working state.

[0019] Figure 3 This is a front view of the present invention in the second working state, wherein the gas replacement mechanism is located above the material.

[0020] Figure 4 It is a structural schematic diagram of the flushing pipe in the present invention.

[0021] Among them: 1. Material supply line; 101. Push rod; 102. Limit rod; 2. Gas replacement mechanism; 201. Sealing chamber; 202. Inlet flushing pipe; 203. In-bag flushing pipe; 204, 205, 206 inflation ports; 3. Roller; 4. Packaging film; 401. Packaging chamber; 5. Forming device; 6. Pulling roller; 7. Longitudinal sealing roller; 8. Frame; 801. Frame table; 9. Horizontal sealer. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like Figure 1-Figure 4 As shown, the fully automatic bag-type modified atmosphere packaging machine of this embodiment includes a frame 8, a gas replacement mechanism 2 is arranged on a frame table 801 of the frame 8, and is installed in a symmetrical form with respect to the center line of the longitudinal groove of the former 5, and the gas replacement mechanism 2 includes a sealing chamber 201, an inlet flushing pipe 202 and an in-bag flushing pipe 203.

[0024] The material feeding line 1 includes a push rod 101 and a limit rod 102. The length of the push rod 101 is smaller than the spacing of the limit rods 102, and the gap is only for a single material to pass through, and its movement mode is rotary; the spacing of the limit rods 102 is slightly larger than the material width, and a rounded structure is provided at the end, and its center plane is coplanar with the center plane of the push rod 101.

[0025] The sealed cavity 201 is a rectangular shell, and the shell surface in contact with the frame table 801 is an open structure; the sealed cavity 201 is installed on the frame table 801 in a symmetrical form of the longitudinal slot center line of the former 5, and the traction roller 6 and the longitudinal sealing roller 7 are covered therein; three inflation ports 204, 205, and 206 are provided at the bottom or side of the sealed cavity 201 for filling pre-prepared gas, wherein the inflation port 204 is connected to the inlet flushing pipe 202 through a hose, the inflation port 206 is connected to the bag flushing pipe 203 through a hose, and the inflation port 205 is the inflation inlet of the sealed cavity 201, and continuous inflation through the inflation port 205 ensures that the gas inside the sealed cavity 201 is always in a positive pressure state relative to the external gas;

[0026] The inlet flushing pipe 202 is fixed on the side wall of the sealed cavity 201 near the material feeding line 1, and its air outlet is located at the front end of the longitudinal groove surface of the former 5, and extends out of the sealed cavity 201; the inlet flushing pipe 202 and the sealed cavity wall 201 form an angle of 30°-60°, and the angle and the vertical position can be adjusted according to the material size, feeding speed, etc., so as to achieve effective inflation of the inlet of the front section of the former 5 by the inlet flushing pipe 202, and reduce the air that may be brought into the packaging cavity 401 during the material feeding process; the inlet flushing pipe 202 is a hollow structure, and its cross section is any one of a flat rectangle and an arc; the long side dimension of the cross section of the inlet flushing pipe 202 is slightly larger than the cross section width of the former 5;

[0027] The in-bag flushing tube 203 is located in the sealing cavity 201 and between the traction roller 6 and the longitudinal sealing roller 7. The air outlet is located in the interlayer of the two layers of packaging film 4 overlapped by the longitudinal seal of the former 5. At the same time, the installation position of the air outlet should not affect the smooth supply of the material in the packaging cavity 401; the in-bag flushing tube 203 is a hollow structure, flat as a whole, and has a cross-section of any one of a flat rectangle and an ellipse, and its thickness is less than the width of the longitudinal groove of the former 5.

[0028] The specific structure and working process of this embodiment are as follows:

[0029] like Figure 1-Figure 4 As shown, a specific embodiment of the present invention includes a material supply line 1 and a gas replacement mechanism 2.

[0030] The packaging film 4 on the roller 3 is pulled by the pulling roller 6 and formed into a cylindrical shape by the former 5; the material is fed individually by the pushing rod 101 in the material feeding line 1, and after being sorted by the two limit rods 102, it is input into the cylindrical packaging cavity 401.

[0031] The gas replacement mechanism 2 is installed on the frame table 801 of the frame 8, and pre-prepared gas is continuously filled into the sealing cavity 201 through the inflation port 205 to preliminarily flush and replace the air in the packaging cavity 401; before the material enters the packaging cavity 401, it is continuously flushed by the inlet flushing pipe 202 in the gas replacement mechanism 2 to remove the air carried by the material input; and the bag flushing pipe 203 located between the traction roller 6 and the longitudinal sealing roller 7 continuously fills the longitudinal seal overlap interlayer of the packaging film 4 with pre-prepared gas to further flush and remove the residual air at the bottom of the packaging bag; subsequently, the longitudinal sealing roller 7 completes the longitudinal sealing of the packaging film 4, and the transverse sealer 9 completes the transverse seals at both ends and cuts them off before output.

[0032] Through the initial flushing and positive pressure state of the sealed cavity 201, most of the gas in the packaging bag can be replaced; then the inlet flushing pipe 202 and the bag flushing pipe 203 respectively eliminate the air carried by the material input and the residual air in the bottom of the bag to achieve continuous and high-precision modified atmosphere packaging.

[0033] The above is only a preferred embodiment of the present invention and does not limit the present invention. It should be noted that a person skilled in the art can develop a variety of modifications and variations of similar mechanisms without departing from the principle and scope of the present invention, which should also be regarded as the protection scope of the present invention.

Claims

1. A fully automatic bag-type modified atmosphere packaging machine, comprising a frame (8), on which a gas replacement mechanism (2) is arranged, characterized in that: The gas replacement mechanism (2) comprises a sealed cavity (201), an inlet flushing pipe (202) and an in-bag flushing pipe (203), and the gas replacement mechanism (2) is installed on the frame table (801) in a symmetrical manner with respect to the center line of the longitudinal slot of the former (5); The specific structure of the sealed cavity (201) is as follows: The sealing chamber (201) is a rectangular shell, and the shell surface in contact with the frame table (801) is an open structure; the sealing chamber (201) is installed on the frame table (801) in a symmetrical form with respect to the longitudinal slot center line of the former (5), and the traction roller (6) and the longitudinal sealing roller (7) are covered therein; The sealed cavity (201) is provided with three inflation ports (204, 205, 206) at the bottom or side thereof for injecting pre-prepared gas, wherein the inflation port (204) is connected to the inlet flushing pipe (202) via a hose, the inflation port (206) is connected to the bag internal flushing pipe (203) via a hose, and the inflation port (205) is the inflation inlet of the sealed cavity (201). Continuous inflation through the inflation port (205) ensures that the gas inside the sealed cavity (201) is always in a positive pressure state relative to the external gas; The specific structure of the inlet flushing pipe (202) is as follows: The inlet flushing pipe (202) is fixed on the side wall of the sealed cavity (201) near the material feeding line (1), and its air outlet is located at the front end of the longitudinal groove surface of the former (5) and extends out of the sealed cavity (201); the inlet flushing pipe (202) forms an angle of 30°-60° with the sealed cavity wall (201), and the angle and the vertical position can be adjusted according to the material size, feeding speed, etc., so as to achieve effective inflation of the inlet of the front section of the former (5) by the inlet flushing pipe (202), thereby reducing the air brought into the packaging cavity (401) during the material feeding process; The specific structure of the in-bag flushing tube (203) is as follows: The in-bag flushing pipe (203) is located in the sealing cavity (201) and between the traction roller (6) and the longitudinal sealing roller (7). Its air outlet is located in the interlayer of two layers of packaging film (4) overlapped by the longitudinal sealing of the former (5). At the same time, the installation position of the air outlet should not affect the smooth supply of materials in the packaging cavity (401).

2. The fully automatic bag-type modified atmosphere packaging machine according to claim 1, characterized in that: The inlet flushing pipe (202) is a hollow structure, and its cross section is any one of a flat rectangular shape and an arc shape; the long side dimension of the cross section of the inlet flushing pipe (202) is slightly larger than the cross section width of the former (5).

3. The fully automatic bag-type modified atmosphere packaging machine according to claim 1, characterized in that: The in-bag flushing tube (203) is a hollow structure and is flat as a whole; the cross-section of the in-bag flushing tube (203) is any one of a flat rectangular and an elliptical shape, and its thickness is smaller than the longitudinal slot width of the former (5).

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