A bag maker

Abstract

This application discloses a bag-making device, belonging to the technical field of packaging production. It includes a bag-making frame with two parallel pre-forming blocks. A film-spreading plate is disposed on one side of the two pre-forming blocks that is far apart from each other. The film-spreading plate has an angle α with the x-axis, the angle α being between 10 degrees and 80 degrees. This application has the effect of preventing irreversible creases from forming in the plastic film during the bag-making process, thereby ensuring the production quality of the formed bags.

Description

Technical Field

[0001] This application relates to the field of packaging production, and in particular to a bag maker. Background Technology

[0002] A bag maker is a device or tool used to make packaging bags. It mainly takes a flat plastic film and quickly turns it into a pillow-shaped bag through processes such as folding and heat sealing. It is widely used in automated packaging production lines in industries such as food, retail, and chemicals.

[0003] Existing bag makers typically include a bag-making frame, a pre-forming block, a forming base plate, and forming side plates. During operation, a flat plastic film is fed into the forming base plate and forming side plates under the pressure and guidance of the pre-forming block and folded. When the flat plastic film or paper is folded into a pillow bag and continues to be conveyed, the opening of the bag is heat-sealed by the sealing mechanism at the bottom of the bag maker.

[0004] In the production process of the aforementioned bag maker, the flat plastic film is directly pressed and guided by the pre-forming block. The plastic film is prone to stress concentration due to rapid bending and folding, which leads to irreparable creases in the plastic film and makes it difficult to ensure the production quality of the bag. Utility Model Content

[0005] In order to prevent the plastic film from developing irreversible creases during the bag-making process, thereby ensuring the production quality of the formed bags, this application provides a bag-making device.

[0006] The bag maker provided in this application adopts the following technical solution: A bag maker includes a bag-making frame, the bag-making frame being provided with two parallel front forming blocks, and a film spreading plate being provided on the side of the two front forming blocks that are far apart from each other. The film spreading plate has an included angle α with the x-axis, the included angle α being between 10 degrees and 80 degrees.

[0007] By adopting the above technical solution, the two pre-forming blocks are equipped with a film spreading plate, which allows the flat plastic film to be smoothly stretched and guided by the film spreading plate before entering the folding area. This facilitates the effective release of the internal stress of the plastic film and optimizes the feeding angle, thereby greatly reducing the hard folding pressure between the plastic film and the pre-forming blocks. This makes it less likely for the plastic film to experience stress concentration caused by rapid bending and folding, and thus makes it less likely for the plastic film to produce irreparable creases, which helps to ensure the production quality of bag forming.

[0008] Optionally, the film spreading plate includes a film spreading fixing part and a film spreading guide part. One side of the film spreading guide part is fixedly connected to the film spreading fixing part. The included angle α is located between the film spreading guide part and the x-axis. One side of the film spreading fixing part is provided with a film spreading adjustment groove that extends through and along the y-axis. The film spreading fixing part is fixed to the front forming block by bolts that pass through the film spreading adjustment groove and are threadedly engaged with the front forming block.

[0009] By adopting the above technical solution, it is easy to make slight adjustments to the horizontal position of the film spreading plate along the y-axis, thereby facilitating further optimization of the initial contact point and coverage area between the film and the spreading plate, ensuring that the film enters the folding area with a relatively smooth path, thus stably avoiding creases and enhancing the adaptability of the equipment to different production needs.

[0010] Optionally, the bag-making frame includes a front mounting frame, which has two vertical through holes extending along the x-axis. The two front forming blocks are fixed to the front mounting frame by two bolts that pass through the two front adjustment holes and are threaded together.

[0011] By adopting the above technical solution, it is easy to adjust the position of the two front forming blocks along the x-axis, and thus it is easy to make adaptive adjustments according to plastic films of different widths, making it highly applicable.

[0012] Optionally, the bag-making frame also includes a front fixing frame. The front mounting frame has a horizontal through hole on one side that extends vertically. The front mounting frame is fixed to the front fixing frame by bolts that pass through the front fixing hole and are threaded into the front fixing frame.

[0013] By adopting the above technical solution, it is easy to adjust the position of the two front forming blocks along the z-axis by adjusting the height of the front mounting bracket, which in turn facilitates adaptive adjustment according to the different materials of the plastic film, so that plastic films of different materials can enter the folding area in a better unfolded state.

[0014] Optionally, the bag-making frame also includes a frame body, on which a pressing block is fixedly installed by bolts on the top of the frame body, and the front fixing frame slides and engages with the top of the frame body, and the front fixing frame is fixed between the pressing block and the frame body.

[0015] By adopting the above technical solution, it is easy to make fine adjustments to the position of the front fixing frame and all components fixed to it at the top of the frame body by sliding the front fixing frame on the top of the frame body, thus making it more versatile.

[0016] Optionally, the front fixing frame has two parallel front fixing rods extending along the y-axis, and a front limiting block is fixedly installed on the top of the frame body. The front limiting block is located between the two front fixing rods and slides in cooperation with the two front fixing rods. A pressing groove is opened at the bottom of the pressing block, and the two front fixing rods slide in cooperation with the pressing groove.

[0017] By adopting the above technical solution, the setting of the pressure chute and the front limiting block plays a limiting role in the x-axis direction when the two front fixed rods slide, which helps to ensure the stability of the two front fixed rods, i.e. the front fixed frame, when adjusting their position along the y-axis direction.

[0018] Optionally, the bag-making frame is further provided with two forming side plates and a side plate movement assembly. The two forming side plates are arranged facing each other, and the side plate movement assembly is used to drive the two forming side plates to move in a direction that is closer to or further away from each other along the x-axis.

[0019] By adopting the above technical solution, the setting of driving the two forming side plates to move along the x-axis through the side plate motion assembly facilitates the adjustment of the distance between the two forming side plates, thereby making it easy to make timely adaptive adjustments according to different production needs without stopping the machine to manually replace the device. This results in high production flexibility and high production efficiency.

[0020] Optionally, the side plate motion assembly includes a lead screw, a slider, a guide rod, a guide rail, and a guide block. The lead screw is arranged along the y-axis and rotatably mounted on the bag-making frame. The slider slides along the y-axis and is fitted to the bag-making frame. The lead screw passes through and is threaded into the slider. The guide rod is fixedly mounted on the slider and arranged along the x-axis. The guide rod passes through and slides into the two forming side plates. Two guide rails are provided and fixedly mounted on the bag-making frame, with an included angle between them. Two guide blocks are provided and fixedly mounted on the two forming side plates respectively, and the two guide blocks slide into the two guide rails respectively.

[0021] By adopting the above technical solution, when the conveying screw is rotated by force, the moving slider drives the moving guide rod to move together along the y-axis. During this process, the two forming side plates move towards each other or away from each other due to the cooperation of the moving guide block and the moving guide rail, thereby realizing the adjustment of the distance between the two forming side plates, which is convenient and stable.

[0022] Optionally, a motion handwheel is fixedly installed at one end of the motion lead screw.

[0023] By adopting the above technical solution, the design of the motion handwheel makes it easier for the operator to apply force to rotate the motion screw.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Before entering the folding area, the flat plastic film is first smoothly stretched and guided by the film spreading plate, which facilitates the effective release of the internal stress of the plastic film and optimizes the feeding angle. This greatly reduces the hard pressure between the plastic film and the pre-forming block, making it less likely for the plastic film to experience stress concentration due to rapid bending and folding. Consequently, the plastic film is less likely to produce irreparable creases, which helps to ensure the production quality of bag forming.

[0025] 2. The film spreading plate can be adjusted horizontally along the y-axis, which facilitates further optimization of the initial contact point and coverage area between the film and the spreading plate, ensuring that the film enters the folding area with a smoother path, thereby stably avoiding creases and enhancing the equipment's adaptability to different production needs.

[0026] 3. The two front forming blocks can be adjusted in position along the x-axis, which makes it easy to adapt to plastic films of different widths and has strong applicability. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a side view of the overall structure of an embodiment of this application.

[0029] Figure 3 This is a top view of the overall structure of an embodiment of this application.

[0030] Figure 4 This is a front view schematic diagram of the overall structure of an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures: 1. Bag-making frame; 101. Frame body; 102. Front fixing frame; 103. Front mounting frame; 2. Forming base plate; 3. Forming side plate; 4. Side plate motion assembly; 401. Motion screw; 402. Motion slider; 403. Motion guide rod; 404. Motion guide rail; 405. Motion guide block; 5. Motion handwheel; 6. Front fixing rod; 7. Pressing block; 8. Front limiting block; 9. Pressing groove; 10. Front forming block; 11. Film spreading plate; 111. Film spreading fixing part; 112. Film spreading guide part; 12. Film spreading adjustment groove; 13. Front adjustment hole; 14. Front fixing hole. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a bag-making device. (Refer to...) Figure 1The bag maker includes a bag making frame 1, which includes a frame body 101, a front fixing frame 102, and a front mounting frame 103. The frame body 101 is provided with two forming bottom plates 2, two forming side plates 3, and a side plate moving assembly 4.

[0034] Reference Figure 1 and Figure 2 Both forming base plates 2 are fixedly installed on the frame body 101, and two forming side plates 3 are located on top of the two forming base plates 2. A flat plastic film is fed between the two forming base plates 2 and the two forming side plates 3 and folded. In this embodiment, the direction of plastic film conveying is the y-axis direction, and the horizontal direction perpendicular to the direction of plastic film conveying is the x-axis direction. The side plate motion assembly 4 can drive the two forming side plates 3 to move closer or further apart along the x-axis direction, so as to adjust the distance between the two forming side plates 3. This allows for timely adjustments according to different production needs without stopping the machine to manually change the device, improving production flexibility and efficiency.

[0035] Continue to refer to Figure 1 and Figure 2 Specifically, the side plate motion assembly 4 includes a motion screw 401, a motion slider 402, a motion guide rod 403, a motion guide rail 404, and a motion guide block 405. The motion screw 401 is rotatably mounted on the frame body 101 along the y-axis, and a motion handwheel 5 is fixedly mounted at one end of the motion screw 401 to facilitate rotation. The motion slider 402 is slidably fitted onto the frame body 101 along the y-axis, and the motion screw 401 passes through the motion slider 402 and is threaded into it, so that when the motion screw 401 rotates, the motion slider 402 moves along the y-axis. The motion guide rod 403 is fixedly mounted on the motion slider 402 and is arranged along the x-axis, passing through the two molded side plates 3 and slidably fitted onto them.

[0036] Reference Figure 1 and Figure 3Two motion guide rails 404 are fixedly installed on the frame body 101, and there is an included angle between the two motion guide rails 404. In this embodiment, the included angle between the two motion guide rails 404 is selected as 36 degrees. Two motion guide blocks 405 are respectively fixedly installed on the two forming side plates 3, and the two motion guide blocks 405 are respectively slidably engaged with the two motion guide rails 404, so that the two forming side plates 3 can slide along the x-axis direction through the engagement of the motion guide blocks 405 and the motion guide rails 404. When the operator applies force to rotate the motion screw 401 by the motion handwheel 5, the motion slider 402 will drive the motion guide rod 403 to move together along the y-axis direction. During this process, since the motion guide blocks 405 engage with the inclined motion guide rails 404, the two forming side plates 3 will be subjected to a component force and move in a direction closer to or further away from each other along the x-axis direction, that is, the distance between the two forming side plates 3 can be adjusted.

[0037] Reference Figure 1 The front fixing frame 102 has two parallel front fixing rods 6 extending along the y-axis. A pressure block 7 and a front limiting block 8 are fixedly installed on the top of the frame body 101 by bolts (not shown in the figure). The pressure block 7 and the front limiting block 8 are distributed along the y-axis, with the front limiting block 8 located between the two front fixing rods 6 and slidingly engaged with them. A pressure groove 9 is provided at the bottom of the pressure block 7. The two front fixing rods 6 slide against the top of the frame body 101 and against the two opposite walls of the pressure groove 9. Tightening the bolts fixing the pressure block 7 allows the pressure block 7 to press against the two front fixing rods 6, thus fixing the two front fixing rods 6, i.e., the front fixing frame 102, to the frame body 101. Loosening the bolts fixing the pressure block 7 allows for slight adjustments to the position of the front fixing frame 102 along the y-axis by moving the two front fixing rods 6, making it highly adaptable.

[0038] Reference Figure 1 and Figure 4 The front mounting bracket 103 has a front fixing hole 14 that runs horizontally through the y-axis and extends vertically on one side. The front mounting bracket 103 is fixed to the front fixing bracket 102 by bolts (not shown in the figure) that pass through the front fixing hole 14 and are threaded to the front fixing bracket 102. This makes it easy to adjust the height of the front mounting bracket 103 in the vertical direction by turning the bolts, which helps to further enhance its applicability.

[0039] Reference Figure 1The front mounting bracket 103 is provided with two parallel front forming blocks 10. Specifically, the front mounting bracket 103 has two vertical through holes 13 extending along the x-axis. The two front forming blocks 10 are fixed to the front mounting bracket 103 by two bolts that pass through the two front adjusting holes 13 and are threaded together. The position of the two front forming blocks 10 along the x-axis can be easily adjusted by turning the bolts, thereby facilitating the adaptive adjustment of plastic films of different widths.

[0040] Continue to refer to Figure 1 Each of the two pre-forming blocks 10 has a film spreading plate 11 on one side away from each other. The film spreading plate 11 includes a film spreading fixing part 111 and a film spreading guide part 112. One side of the film spreading guide part 112 is fixedly connected to the film spreading fixing part 111. One side of the film spreading fixing part 111 has a film spreading adjustment groove 12 that runs through the x-axis and extends along the y-axis. Each film spreading fixing part 111 is fixed to the pre-forming block 10 by two bolts (not shown in the figure) that pass through its own film spreading adjustment groove 12 and are threadedly engaged with the pre-forming block 10. The setting of the film spreading adjustment groove 12 facilitates the fine adjustment of the film spreading plate 11 along the y-axis, thereby optimizing the initial contact point and coverage range of the plastic film with the film spreading plate 11 when folding.

[0041] Reference Figure 1 and Figure 4 The film spreading guide 112 has an angle α with the x-axis. The angle α is between 10 degrees and 80 degrees. The angle α can be 10 degrees or 80 degrees. In this embodiment, the angle α is selected as 35 degrees so that the flat plastic film is smoothly spread and guided by the film spreading plate 11 before entering the folding area. This facilitates the effective release of the internal stress of the plastic film and optimizes the feeding angle, thereby greatly reducing the hard folding and pressing between the plastic film and the pre-forming block 10.

[0042] The implementation principle of a bag maker according to an embodiment of this application is as follows: During the production process, the flat plastic film is first smoothly stretched and guided by the film spreading plate 11 before entering the folding area, which facilitates the effective release of the internal stress of the plastic film and optimizes the feeding angle, thereby greatly reducing the hard folding pressure between the plastic film and the pre-forming block 10. This makes it less likely for the plastic film to experience stress concentration caused by rapid bending and folding, and thus makes it less likely for the plastic film to produce irreparable creases, which helps to ensure the production quality of bag forming.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bag maker, comprising a bag-making frame (1), characterized in that: The bag-making frame (1) is provided with two parallel front forming blocks (10). A film spreading plate (11) is provided on the side of the two front forming blocks (10) that are far apart. The film spreading plate (11) has an angle α with the x-axis, and the angle α is between 10 degrees and 80 degrees.

2. The bag maker according to claim 1, characterized in that: The film spreading plate (11) includes a film spreading fixing part (111) and a film spreading guide part (112). The film spreading guide part (112) is fixedly connected to the film spreading fixing part (111) on one side. The included angle α is located between the film spreading guide part (112) and the x-axis. A film spreading adjustment groove (12) is provided on one side of the film spreading fixing part (111) and extends along the y-axis. The film spreading fixing part (111) is fixed to the front forming block (10) by bolts that pass through the film spreading adjustment groove (12) and are threadedly engaged with the front forming block (10).

3. A bag maker according to claim 1, characterized in that: The bag-making frame (1) includes a front mounting frame (103), which has two vertical through holes (13) extending along the x-axis. The two front forming blocks (10) are fixed to the front mounting frame (103) by two bolts that pass through the two front adjustment holes (13) and are threaded together.

4. A bag maker according to claim 3, characterized in that: The bag-making frame (1) also includes a front fixing frame (102). The front mounting frame (103) has a horizontal through hole (14) extending in the vertical direction on one side. The front mounting frame (103) is fixed to the front fixing frame (102) by bolts that pass through the front fixing hole (14) and are threaded to the front fixing frame (102).

5. A bag maker according to claim 4, characterized in that: The bag-making frame (1) also includes a frame body (101), on which a pressing block (7) is fixedly installed by bolts. The front fixing frame (102) slides and cooperates with the top of the frame body (101), and the front fixing frame (102) is fixed between the pressing block (7) and the frame body (101).

6. A bag maker according to claim 5, characterized in that: The front fixing frame (102) has two parallel front fixing rods (6) extending along the y-axis. A front limiting block (8) is fixedly installed on the top of the frame body (101). The front limiting block (8) is located between the two front fixing rods (6) and slides in cooperation with the two front fixing rods (6). The bottom of the pressing block (7) is provided with a pressing groove (9), and the two front fixing rods (6) slide in cooperation with the pressing groove (9).

7. A bag maker according to claim 1, characterized in that: The bag-making frame (1) is also provided with two forming side plates (3) and a side plate movement assembly (4). The two forming side plates (3) are arranged facing each other, and the side plate movement assembly (4) is used to drive the two forming side plates (3) to move towards each other or away from each other along the x-axis.

8. A bag maker according to claim 7, characterized in that: The side panel motion assembly (4) includes a motion lead screw (401), a motion slider (402), a motion guide rod (403), a motion guide rail (404), and a motion guide block (405). The motion lead screw (401) is arranged along the y-axis and rotatably mounted on the bag-making frame (1). The motion slider (402) slides along the y-axis and is fitted to the bag-making frame (1). The motion lead screw (401) passes through and is threaded into the motion slider (402). The motion guide rod (403)... The motion guide rod (403) is fixedly installed on the motion slider (402) and set along the x-axis. The motion guide rod (403) passes through and slides and engages with the two forming side plates (3). There are two motion guide rails (404) and both are fixedly installed on the bag making frame (1). There is an included angle between the two motion guide rails (404). There are two motion guide blocks (405) and they are fixedly installed on the two forming side plates (3). The two motion guide blocks (405) slide and engage with the two motion guide rails (404) respectively.

9. A bag maker according to claim 8, characterized in that: A motion handwheel (5) is fixedly installed at one end of the motion lead screw (401).

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