A light-proof plastic packaging bag for game cards and a detection method thereof

Abstract

The present invention belongs to the field of detection technology, and more particularly relates to a light-proof plastic packaging bag for gaming cards and a detection method. The packaging machine for the detection method comprises: a frame; an unwinding assembly sequentially arranged on the frame, for placing a wound film roller and unwinding the film roller toward a bag maker; a bag maker, for folding back the two sides of a passing packaging bag body and wrapping the product therein; a longitudinal sealing assembly, for longitudinally sealing the formed packaging bag body; a transverse sealing assembly, for transversely sealing the longitudinally sealed packaging bag body; and a conveyor belt assembly, for conveying the product; wherein the product is sequentially conveyed on the conveyor belt assembly, and the product is wrapped when the packaging bag body folds back.

Description

Technical Field

[0001] The present invention belongs to the field of detection technology, and in particular relates to a light-proof plastic packaging bag for game cards and a detection method. Background Art

[0002] In the sales process of card products such as game cards, packaging bags are needed to package the cards to protect the products. With the booming blind box economy, the uncertainty when opening the blind box is deeply loved and welcomed by modern young people. Nowadays, blind card boxes also have good market prospects. However, some of the current plastic bags used to package cards have a certain degree of light transmittance. Therefore, during the product sales process, it was found that some buyers can detect the type of cards in the packaging in advance through the light transmittance of the packaging without unpacking, which will harm the interests of manufacturers. Summary of the Invention

[0003] The object of the present invention is to provide a light-proof plastic packaging bag for game cards and a detection method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] On the one hand, a light-proof plastic packaging bag for game cards is provided, which includes: a packaging bag body, which is a multi-layer composite structure and is divided into a printing layer, an aluminum-plated layer, a light-blocking layer and a shock-absorbing bubble layer from the outside to the inside.

[0006] On the other hand, a detection method for the above packaging bag is also provided, the detection method comprising the following steps:

[0007] Step 1: Use a packaging machine to seal the packaging bag body with plastic. The surface of the sealed packaging bag is smooth, the heat seal is firm and not easy to tear;

[0008] Step 2: Use the instrument to test the light transmittance of the packaging bag body and different positions of the existing packaging bag;

[0009] Step 3: Take the average light transmittance of all packaging bag bodies and compare it with the average light transmittance of existing packaging bags to detect whether the light transmittance performance of the packaging bag bodies is qualified through comparison.

[0010] In the above technical solution, further, in step 2, transmittance detection is performed on the ink-free area, white ink area and color ink area on the packaging bag body and the existing packaging bag.

[0011] In any of the above technical solutions, further, in step 1, the packaging machine includes:

[0012] Rack; and

[0013] The unwinding assembly is used to place the wound film drum and unwind the film drum to the bag forming device;

[0014] The bag former folds the two sides of the passing bag body backwards and wraps the product inside it;

[0015] The longitudinal sealing component is used to longitudinally seal the bag body after it is formed;

[0016] The transverse sealing component is used to transversely seal the packaging bag body after longitudinal sealing;

[0017] and conveyor belt assemblies for conveying products;

[0018] The products are conveyed sequentially on the conveyor belt assembly, and the products are wrapped when the packaging bag body is folded backward.

[0019] In any of the above technical solutions, further, the unwinding assembly has two groups, which are symmetrically arranged above the frame, one of which is a spare group, and the unwinding assembly includes:

[0020] a first support frame;

[0021] The unwinding roller is arranged on the supporting frame, and the film drum is placed on the unwinding roller;

[0022] The tensioning roller is arranged close to the unwinding roller and is used to adjust the tension of the packaging bag body;

[0023] and a guide roller for guiding the packaging bag body toward the bag forming device;

[0024] The unwinding assembly further includes a detection switch for detecting whether the packaging bag body on the unwinding assembly has been unwound. After the film roller on one unwinding assembly has been unwound, the other unwinding assembly is started to unwind.

[0025] In any of the above technical solutions, further, the longitudinal sealing assembly includes:

[0026] The film pulling wheel moves the bag body backward after it is formed;

[0027] The longitudinal sealing heating plate heats both sides of the longitudinal opening of the packaging bag body;

[0028] And the longitudinal sealing pressing wheel is used to press the two sides of the longitudinal opening of the packaging bag body to achieve sealing.

[0029] In this technical solution,

[0030] In any of the above technical solutions, further, the transverse sealing assembly includes:

[0031] A transverse sealing seat, wherein the transverse sealing seat is divided into an upper seat body and a lower seat body arranged up and down, and the upper seat body is adjustable in the vertical direction;

[0032] and a transverse sealing knife assembly, which is arranged on the upper seat body and is used for transversely sealing and cutting the packaging bag body when moving up and down.

[0033] In any of the above technical solutions, further, the packaging machine also includes: a coding component, which is arranged between the unwinding component and the bag maker, and is used to code the outer surface of the packaging bag body to form patterns and texts on the surface.

[0034] In any of the above technical solutions, further, it also includes a tension adjustment component, which is arranged in front of the bag maker and is used to adjust the tension of the packaging bag body when it passes through the bag maker before the packaging bag body is bagged.

[0035] In any of the above technical solutions, further, the tension adjustment component includes:

[0036] The second support frame, and the

[0037] Feed roller, after the packaging bag body passes through the guide roller, it moves backward from the feed roller;

[0038] A driving roller connected to a motor, which is used to drive the packaging bag body thereon to move when the driving roller rotates;

[0039] A driven roller is arranged above and below the driving roller, and the driven roller and the driving roller jointly pull the packaging bag body backward;

[0040] A swing arm is swingably arranged on the second support frame, and a swing arm roller is provided on the swing arm, and the swing arm roller is used to guide the packaging bag body on the active roller and the driven roller toward the bag forming device;

[0041] The driving part is used to drive the swing arm to swing and change the position of the swing arm roller to adjust the tension of the packaging bag body.

[0042] The beneficial effects of the present invention are:

[0043] 1. Traditional packaging bags generally only have a film structure made of polypropylene film. Now, an aluminum layer and a light-blocking layer are added on the original basis. The aluminum layer can not only improve the strength (tear resistance) of the entire packaging bag, but also make the packaging bag waterproof and moisture-proof, making the products in the packaging bag not easily affected by moisture; the light-blocking layer can reduce the light transmittance, preventing the products in the packaging bag from being known to buyers when the packaging bag is not opened, thereby affecting sales.

[0044] 2. This detection method is simple and efficient. After testing this product, the aluminum-coated composite plastic film packaging has good anti-light transmission properties and meets the confidentiality requirements of card packaging.

[0045] 3. This packaging machine has high efficiency and can achieve basically continuous operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of the packaging bag of the present invention;

[0047] Figure 2 Schematic diagram of the layer structure of the packaging bag body of the present invention;

[0048] Figure 3 is a schematic cross-sectional view of the shock-absorbing bubble layer of the present invention;

[0049] Figure 4 Schematic diagram of the planar structure of the shock-absorbing bubble layer of the present invention;

[0050] Figure 5 This is a physical picture of the packaging bag of the present invention;

[0051] Figure 6 It is a structural schematic diagram of the packaging machine of the present invention;

[0052] Figure numerals: 10, packaging bag body; 11, first edge sealing; 12, second edge sealing; 13, serrated edge; 100, printing layer; 110, printing; 200, aluminized layer; 300, light-blocking layer; 400, shock-absorbing bubble layer; 410, bubble; 1, frame; 2, unwinding assembly; 21, first support frame; 22, unwinding roller; 23, tensioning roller; 24, guide roller; 25, detection switch; 3, bag maker; 4, longitudinal sealing assembly; 41, film pulling wheel; 42, longitudinal sealing heating ironing plate; 43, longitudinal sealing pressing wheel; 5, transverse sealing assembly; 51, transverse sealing seat; 52, transverse air knife assembly; 6, conveyor belt assembly; 7, coding assembly; 8, tension adjustment assembly; 81, second support frame; 82, feed roller; 83, active roller; 84, driven roller; 85, swing arm; 86, swing arm roller. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0054] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0055] Example 1:

[0056] like Figure 1-Figure 5 As shown, this embodiment provides a light-proof plastic packaging bag for game cards, and the packaging bag includes: a packaging bag body 10, which is a multi-layer composite structure formed by hot pressing and is divided into a printing layer 100, an aluminum-plated layer 200, a light-blocking layer 300 and a shock-absorbing bubble layer 400 from the outside to the inside.

[0057] The substrate of the printing layer 100 is made of a uniaxially oriented polypropylene film, and the surface of the substrate of the printing layer 100 also has a printing 110. The printing 110 is mainly composed of printed white ink and color ink, so that the surface of the printing layer 100 has a pattern and corresponding text;

[0058] The base material of the aluminum coating layer 200 is a uniaxially oriented polypropylene film, and both sides of the base material of the aluminum coating layer 200 have a coating;

[0059] The light blocking layer 300 is made of a black cast polypropylene film with a thickness of 10 μm to 20 μm.

[0060] Polypropylene (PP for short) is a thermoplastic synthetic resin with excellent performance. It has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high-wear resistance processing performance. Therefore, most plastic packaging bags are made of polypropylene as raw material.

[0061] At present, with the rise of blind boxes, the requirements for plastic packaging bags are getting higher and higher, specifically in terms of their light transmittance. If the packaging bags used to package cards or other products have strong light transmittance, buyers will be able to see the actual objects in the packaging bags with the help of certain light, thereby affecting the sales of some products. Therefore, the applicant has made improvements to the original packaging bags.

[0062] Specifically, traditional packaging bags generally only have a film structure made of polypropylene film. Now, an aluminum-plated layer 200 and a light-blocking layer 300 are added on the original basis. The aluminum-plated layer 200 not only improves the strength (tear resistance) of the entire packaging bag, but also makes the packaging bag waterproof and moisture-proof, making the products in the packaging bag not easily affected by moisture; the light-blocking layer 300 can reduce the light transmittance, preventing the products in the packaging bag from being known to the buyer when the packaging bag is not opened.

[0063] Regarding the material, cast polypropylene film is a polypropylene film produced by the cast process, and black cast polypropylene film has black pigment added to it to achieve a shading effect. At present, black polypropylene film is often used in the battery field. Now that the shading effect is introduced into the packaging bag, the effect is very obvious.

[0064] In this embodiment, the card collectors have extremely high requirements for the integrity of the cards. After purchase, no scratches or folds are allowed. For this reason, the packaging of the cards is further optimized.

[0065] Specifically, the packaging bag body 10 further includes a shock-absorbing bubble layer 400 located inside the light-blocking layer 300. The shock-absorbing bubble layer 400 has a plurality of bubbles 410 equally spaced in the transverse and longitudinal directions. The provision of the shock-absorbing bubble layer 400 significantly reduces the risk of damage to the cards within the packaging bag.

[0066] Example 2:

[0067] This embodiment provides a light-proof plastic packaging bag for game cards. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0068] like Figure 1 and Figure 5 As shown, in this embodiment, the packaging bag body 10 has a first edge seal 11 at both ends and a second edge seal 12 at the rear side; the first edge seal 11 has two edge seal strips, and a serrated edge 13 is further provided at the outer edge of the first edge seal 11.

[0069] In the present technical solution, after the film layer structures of the packaging bag body 10 are compounded with an adhesive, a composite film structure is formed, and the composite film is used to seal and edge the card through a packaging machine. After the card is placed in the packaging bag body 10, the packaging bag body 10 is longitudinally sealed to form a second edge 12, and then the two ends of the packaging bag body 10 are transversely sealed to form a first edge 11; since the second edge 12 is located on the side, the width of its edge can be appropriately increased, but this is not possible for the first edge 11. If the edge width is too large, it will affect the appearance of the entire packaging bag. Therefore, the end of the packaging bag body 10 is sealed twice, so that the first edge 11 has two edge strips. By setting two edge strips, the sealing performance of the packaging bag body 10 is improved.

[0070] In order to facilitate the user to open the packaging bag body 10 and take out the cards therein, Figure 1 As shown, a serrated edge 13 is provided at the end of the first edge seal 11. The serrated edge 13 facilitates the purchaser to tear open the packaging bag body 10 manually without the need for tools such as scissors.

[0071] Example 3:

[0072] This embodiment provides a detection method for the above-mentioned packaging bag, which includes the following steps:

[0073] Step 1: Use a packaging machine to seal the packaging bag body with plastic. The surface of the sealed packaging bag is smooth, the heat seal is firm and not easy to tear;

[0074] Step 2: Use the instrument to test the light transmittance of the packaging bag body and different positions of the existing packaging bag;

[0075] Step 3: Take the average light transmittance of all packaging bag bodies and compare it with the average light transmittance of existing packaging bags to detect whether the light transmittance performance of the packaging bag bodies is qualified through comparison.

[0076] In step 2, light transmittance is tested on the ink-free area, white ink area, and color ink area on the packaging bag body and the existing packaging bag.

[0077] The light transmittance of the packaging bag of the embodiment of the present application and the existing packaging bag (comparison test packaging bag) at the non-printed ink area, the printed white ink area, and the printed color ink area was measured and compared using an instrument. The results are shown in Table 1.

[0078]

[0079] Table 1 Light transmittance of different packaging bags

[0080] According to the transmittance data in Table 1, the average transmittance of the test packaging bag is 0.0024%, and the average transmittance of the existing packaging bag is 5.9850%. It can be concluded that the aluminum-coated composite plastic film packaging has good anti-light transmission properties and meets the confidentiality requirements of card packaging.

[0081] The anti-translucent aluminum-plated composite plastic film packaging was subjected to a plastic sealing molding test using a packaging machine. The test showed that the packaging bag had a flat surface, a firm heat seal, was not easy to tear, and had good plastic sealing quality.

[0082] Example 3:

[0083] like Figure 6 As shown, this embodiment provides a packaging machine for the packaging bag in the above embodiment, and the packaging machine includes:

[0084] Rack 1; and

[0085] The unwinding assembly 2 is used to place the wound film drum and unwind the film drum to the bag forming device 3;

[0086] The bag forming device 3 folds the two sides of the passing packaging bag body backwards and wraps the product inside it;

[0087] The longitudinal sealing component 4 is used to longitudinally seal the packaging bag body after the bag is formed;

[0088] The transverse sealing component 5 is used to transversely seal the packaging bag body after longitudinal sealing;

[0089] and a conveyor belt assembly 6 for conveying products;

[0090] The products are conveyed sequentially on the conveyor belt assembly 6, and the products are wrapped when the packaging bag body is folded backward.

[0091] In this technical solution, a film drum with a film structure wound with the packaging bag body is placed on the unwinding assembly 2, and is unwound by the unwinding assembly 2, so that the film enters the bag maker 3. At the same time, the conveyor belt assembly 6 below conveys the stacked game cards to the bottom of the bag maker 3. The bag maker 3 folds both sides of the film from the bottom and wraps the game cards. Subsequently, the longitudinal sealing assembly 4 seals the film longitudinally, and then the transverse sealing assembly 5 seals the film transversely. Finally, the conveyor belt assembly 6 conveys the packaged game cards outward to complete the packaging of the game cards.

[0092] In this embodiment, specifically, the unwinding assembly 2 has two groups, which are symmetrically arranged above the frame 1, one of which is a spare group. The unwinding assembly 2 includes:

[0093] First support frame 21;

[0094] The unwinding roller 22 is provided on the support frame, and the film drum is placed on the unwinding roller 22;

[0095] The tensioning roller 23 is provided close to the unwinding roller 22 and is used to adjust the tension of the packaging bag body;

[0096] and a guide roller 24 for guiding the packaging bag body toward the bag forming device 3;

[0097] The unwinding assembly 2 further includes a detection switch 25 for detecting whether the packaging bag body on the unwinding assembly 2 has been unwound. After the film roller on one unwinding assembly 2 has been unwound, the other unwinding assembly 2 is started to unwind.

[0098] In this technical solution, in order to improve the working efficiency of the packaging machine and increase the packaging speed, the unwinding component 2 is optimized. For the unwinding component 2, in order to be able to achieve continuous unwinding while reducing downtime, it is set into two groups and used alternately. That is, after one of the unwinding components 2 consumes the film on the film roller on the unwinding component 2, the other unwinding component 2 takes over and works to achieve a working condition close to continuous unwinding.

[0099] Specifically, when the packaging machine is running, the motor connected to the unwinding roller 22 works, driving it to rotate, so that the film moves toward the bag maker 3. During this process, the film continuously changes direction on each guide roller 24, and the tensioning roller 23 is used to tension the film when unwinding to prevent it from loosening.

[0100] Example 4:

[0101] This embodiment provides a packaging machine for the packaging bags in the above embodiment. In addition to the technical solutions of the above embodiment, it also has the following technical features.

[0102] like Figure 6 As shown, in this embodiment, the longitudinal sealing assembly 4 includes:

[0103] The film pulling wheel 41 moves the formed packaging bag body backward;

[0104] The longitudinal sealing heating plate 42 heats both sides of the longitudinal opening of the packaging bag body;

[0105] The longitudinal sealing pressing wheel 43 is used to press the two sides of the longitudinal opening of the packaging bag body to achieve sealing.

[0106] The transverse sealing assembly 5 includes:

[0107] A transverse sealing seat 51, which is divided into an upper seat body and a lower seat body, and the upper seat body is adjustable in the vertical direction;

[0108] And the horizontal sealing knife assembly is arranged on the upper seat body and is used for horizontally sealing and cutting the packaging bag body when moving up and down.

[0109] In this technical solution, the longitudinal sealing component 4 is mainly composed of a film-pulling wheel 41, a heating ironing plate, and a pressing wheel. After the film is formed into a bag, the film-pulling wheel 41 pulls it backward. Subsequently, the longitudinal sealing heating ironing plate 42 heats both sides of the film after heating, and then the transverse sealing component 5 works. The transverse sealing knife assembly on it moves downward, and while transversely sealing the film, it also cuts it, so that the game cards are packaged into bags and finally transported outward.

[0110] Example 5:

[0111] This embodiment provides a packaging machine for the packaging bags in the above embodiment. In addition to the technical solutions of the above embodiment, it also has the following technical features.

[0112] like Figure 6 As shown, in this embodiment, the packaging machine further includes: a coding component 7, which is arranged between the unwinding component 2 and the bag maker 3, and is used to code the outer surface of the packaging bag body to form patterns and texts on the surface.

[0113] In this technical solution, a coding component 7 is added to code the outer surface of the bag body, thereby achieving one-step processing and forming.

[0114] Example 6:

[0115] This embodiment provides a packaging machine for the packaging bags in the above embodiment. In addition to the technical solutions of the above embodiment, it also has the following technical features.

[0116] like Figure 6 As shown, in this embodiment, a tension adjustment component 8 is also included, which is arranged in front of the bag maker 3 and is used to adjust the tension of the packaging bag body when it passes through the bag maker 3 before the packaging bag body is bagged.

[0117] The tension adjustment assembly 8 includes:

[0118] The second support frame 81 and the

[0119] Feed roller 82, after the packaging bag body passes through the guide roller 24, it moves backward from the feed roller 82;

[0120] The active roller 83 is connected to a motor and is used to drive the packaging bag body thereon to move when the active roller 83 rotates;

[0121] A driven roller 84 is provided above and below the driving roller 83, and the driven roller 84 and the driving roller 83 together pull the packaging bag body backward;

[0122] A swing arm 85 is swingably disposed on the second support frame 81 , and a swing arm roller 86 is disposed on the swing arm 85 , and the swing arm roller 86 is used to guide the packaging bag body from the active roller 83 and the driven roller 84 toward the bag forming device 3 ;

[0123] The driving part (located at the rear side of the swing arm, not visible) is used to drive the swing arm 85 to swing, change the position of the swing arm roller 86, and adjust the tension of the packaging bag body.

[0124] In this technical solution, if the film has uneven tension when passing through the bagging device 3, it will cause uneven film movement, which will affect subsequent packaging. Therefore, it is particularly important for the tension adjustment component 8 to adjust the film. Currently, some tension adjustment mechanisms cannot achieve real-time adjustment and can only be adjusted manually. Therefore, a structure is provided that can adjust in real time according to the film tension. Specifically, the active roller 83 and the driven roller 84 further pull the film, which can adjust the film movement speed in real time. The film tension is adjusted by the swing arm roller 86 on the swing arm 85. The swing arm 85 is driven by the drive unit to swing, thereby adjusting the pressure acting on the film and controlling the film tension.

[0125] As for the driving part, a motor can be used to drive its rotation. A plurality of pressure sensors are installed along the circumferential direction on the swing arm roller 86. The pressure sensors are used to detect the pressure on the membrane. According to the pressure detected by the pressure sensor, the controller controls the motor to rotate forward or reverse, thereby making the swing arm 85 swing to the appropriate position.

[0126] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A method for detecting anti-transmittance plastic packaging bags for game cards, characterized in that: The packaging bag comprises: a packaging bag body (10), wherein the packaging bag body (10) is a multi-layer composite structure, which is divided into a printing layer (100), an aluminum-plated layer (200), a light-blocking layer (300), and a shock-absorbing bubble layer (400) from the outside to the inside; the detection method comprises the following steps: step 1: using a packaging machine to seal the packaging bag body with plastic, wherein the surface of the packaging bag after plastic sealing is smooth, the heat seal is firm, and it is not easy to tear; Step 2: Use the instrument to test the light transmittance of the packaging bag body and the ink-free area, white ink area, and color ink area on the existing packaging bag; Step 3: Take the average light transmittance of all packaging bags and compare it with the average light transmittance of existing packaging bags to test whether the light transmittance of the packaging bags is qualified. In step 1, the packaging machine includes: a frame (1); and An unwinding assembly (2) is used to place the wound film drum and unwind the film drum toward the bag forming device (3); The bag forming device (3) folds the two sides of the passing packaging bag body backwards and wraps the product therein; A longitudinal sealing component (4) is used to longitudinally seal the packaged bag body after it is formed; A transverse sealing component (5) is used to transversely seal the longitudinally sealed packaging bag body; and a conveyor belt assembly (6) for conveying products; The products are sequentially conveyed on the conveyor belt assembly (6), and the products are wrapped when the packaging bag body is folded backward; The unwinding assembly (2) has two groups and is symmetrically arranged above the frame (1), one of which is a standby group. The unwinding assembly (2) includes: a first support frame (21); An unwinding roller (22) is arranged on the support frame, and the film drum is placed on the unwinding roller (22); A tensioning roller (23) is provided close to the unwinding roller (22) and is used to adjust the tension of the packaging bag body; and a guide roller (24) for guiding the packaging bag body toward the bag forming device (3); The unwinding assembly (2) further includes a detection switch (25) for detecting whether the packaging bag body on the unwinding assembly (2) has been unwound. After the film roller on one unwinding assembly (2) has been unwound, the other unwinding assembly (2) is started to unwind.

2. The method for detecting a light-proof plastic packaging bag for game cards according to claim 1, characterized in that: The longitudinal sealing assembly (4) comprises: a film-pulling wheel (41) for moving the formed packaging bag body backward; A longitudinal sealing heating plate (42) heats both sides of the longitudinal opening of the packaging bag body; and a longitudinal sealing pressing wheel (43) for compacting the two sides of the longitudinal opening of the packaging bag body to achieve sealing.

3. The method for detecting a light-proof plastic packaging bag for game cards according to claim 2, characterized in that: The transverse sealing assembly (5) comprises: a transverse sealing seat (51), wherein the transverse sealing seat (51) is divided into an upper seat body and a lower seat body arranged up and down, and the upper seat body is adjustable in the vertical direction; and a transverse sealing knife assembly, which is arranged on the upper seat body and is used for transversely sealing and cutting the packaging bag body when moving up and down.

4. The method for detecting a light-proof plastic packaging bag for game cards according to claim 3, characterized in that: The packaging machine further comprises: a coding component (7) arranged between the unwinding component (2) and the bag forming device (3), and used for coding the outer surface of the packaging bag body to form patterns and text on the surface.

5. The method for detecting a light-proof plastic packaging bag for game cards according to claim 1, characterized in that: It also includes a tension adjustment component (8) which is arranged in front of the bag maker (3) and is used to adjust the tension of the packaging bag body when it passes through the bag maker (3) before the packaging bag body is bagged.

6. The method for detecting a light-proof plastic packaging bag for game cards according to claim 5, characterized in that: The tension adjustment assembly (8) includes: a second support frame (81), and a feed roller (82) arranged on the second support frame (81); after the packaging bag body passes through the guide roller (24), it moves backward from the feed roller (82); A driving roller (83) is connected to a motor and is used to drive the packaging bag body thereon to move when the driving roller (83) rotates; A driven roller (84) is arranged above and below the driving roller (83), and the driven roller (84) and the driving roller (83) jointly pull the packaging bag body backward; A swing arm (85) is swingably arranged on the second support frame (81), and a swing arm roller (86) is provided on the swing arm (85). The swing arm roller (86) is used to guide the packaging bag body on the active roller (83) and the driven roller (84) toward the bag forming device (3); The driving part is used to drive the swing arm (85) to swing and change the position of the swing arm roller (86) to adjust the tension of the packaging bag body.

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