A plastic bag forming apparatus

Abstract

The utility model relates to plastic bag forming technical field, especially a kind of plastic bag forming device, including mounting plate, the upper end left part of mounting plate is fixedly connected with support plate, the left end middle part of support plate is fixedly connected with main body mechanism;The main body mechanism includes electric push rod, the output of electric push rod is through support plate and is fixedly connected with first connecting plate, the outer surface middle part of guide rod is slidably connected with forming assembly, the inner plate wall middle part of first fixed plate is rotatably connected with rotating assembly by pivot, electric push rod is fixedly connected in the left end middle part of support plate.The plastic bag forming device of the utility model, the plastic bag forming device is realized double heating plate precision synchronous displacement by electric push rod and rotating assembly linkage, cooperate first temperature sensor and second temperature sensor temperature control and reset spring energy-saving design, significantly improve heat sealing precision and stability and reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag forming technology, and in particular to a plastic bag forming device. Background Technology

[0002] In the field of plastic packaging production, the forming of plastic bags usually requires heat sealing to encapsulate plastic film into bags with a specific volume. This process must ensure precise heat sealing temperature and stable mechanical movement to guarantee sealing quality. Existing plastic bag forming devices mostly adopt a single heating plate structure, which directly drives the heat sealing block displacement through a cylinder or motor. In actual production, the following technical problems exist: Traditional devices rely on a single drive mechanism to drive the heat sealing block, which is prone to displacement deviation. Moreover, the simple guide structure leads to inaccurate alignment of the upper and lower heating plates during heat sealing, causing problems such as leaks and incomplete seals in the plastic bag, affecting the packaging sealing performance and product qualification rate. Therefore, it is necessary to design a plastic bag forming device to solve the above problems. Utility Model Content

[0003] The main objective of this invention is to provide a plastic bag forming device that can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A plastic bag forming device includes an installation plate, a support plate fixedly connected to the upper left part of the installation plate, a main body mechanism fixedly connected to the middle left part of the support plate, a limit plate fixedly connected to the upper right part of the installation plate, and a groove formed in the middle right part of the limit plate.

[0006] The main structure includes an electric push rod. The output end of the electric push rod passes through a support plate and is fixedly connected to a first connecting plate. Guide rods are fixedly connected to the front and rear right ends of the first connecting plate. A first fixing plate is fixedly connected to the middle right end of the first connecting plate. A second connecting plate is fixedly connected to the right ends of the guide rods. A return spring is sleeved on the right side of the outer surface of each guide rod. A third connecting plate is fixedly connected to the left ends of the two return springs. A first heating plate is fixedly connected to the middle left end of the third connecting plate. A first heat sealing block is fixedly connected to the middle left end of the first heating plate. A first temperature sensor is provided at the front upper end of the first heating plate. A forming component is slidably connected to the middle outer surface of the guide rods. A rotating component is movably connected to the middle inner wall of the first fixing plate via a rotating shaft. The electric push rod is fixedly connected to the middle left end of the support plate.

[0007] Preferably, the rotating assembly includes a linkage plate, a rotating rod is fixedly connected to the upper middle part of the linkage plate, and the left and right walls of the linkage plate are respectively movably connected to a first linkage rod and a second linkage rod via a rotating shaft, and the linkage plate is located in a groove.

[0008] Preferably, the molding component includes a fourth connecting plate, with through sliding holes at both the front and rear right ends of the fourth connecting plate, a second fixing plate fixedly connected to the middle left end of the fourth connecting plate, a second heating plate fixedly connected to the right end of the fourth connecting plate, a second temperature sensor provided at the front upper end of the second heating plate, a second heat sealing block fixedly connected to the middle right end of the second heating plate, and the fourth connecting plate slidably connected to the outer surface of the guide rod.

[0009] Preferably, the left side of the first linkage rod is movably connected to the first fixed plate via a rotating shaft, and the right side of the second linkage rod is movably connected to the second fixed plate via a rotating shaft. The upper and lower ends of the rotating rod are respectively movably connected to the upper and lower groove walls of the groove via bearings.

[0010] Preferably, the other end of the reset spring is fixedly connected to the left wall of the second connecting plate, the third connecting plate is movably connected to the outer surface of the guide rod, and the first heating plate is located directly to the right of the second heating plate.

[0011] Preferably, the outer surfaces of the two guide rods are respectively interlaced and movably connected to the front right end and the rear right end of the limiting plate.

[0012] Preferably, the fourth connecting plate achieves horizontal displacement through a sliding fit between a sliding hole and a guide rod, and the inner diameter of the sliding hole is adapted to the outer diameter of the guide rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In this utility model, the first connecting plate is driven by an electric push rod to move the guide rod and the first fixed plate. With the limiting plate limiting the guide rod, the linear accuracy of the double heating plate displacement is ensured. At the same time, the linkage plate in the rotating assembly realizes the synchronous movement of the double heating plate through the first linkage rod and the second linkage rod, avoiding the displacement deviation of the traditional single drive mechanism, so that the first heat sealing block and the second heat sealing block are accurately aligned, effectively solving the problems of missing seal and false seal.

[0015] 2. In this utility model, the first and second temperature sensors are PT100 resistance temperature detectors, which monitor the temperature of the first and second heating plates in real time. Combined with the automatic reset structure of the reset spring, the ineffective working time of the heating plates is reduced, and the heat sealing efficiency is improved, achieving a dual optimization of precise temperature control and high energy efficiency. Attached Figure Description

[0016] Figure 1 This is a first-view structural schematic diagram of a plastic bag forming device according to the present invention;

[0017] Figure 2 This is a second-view structural schematic diagram of a plastic bag forming device according to the present invention;

[0018] Figure 3 This is a schematic diagram of the main structure and a partially enlarged combination of the plastic bag forming device of this utility model;

[0019] Figure 4 This is a schematic diagram of the rotating component structure of a plastic bag forming device according to the present invention;

[0020] Figure 5 This is a schematic diagram of the forming component structure of a plastic bag forming device according to the present invention.

[0021] In the diagram: 1. Mounting plate; 2. Support plate; 3. Main body mechanism; 4. Limiting plate; 5. Groove; 31. Electric push rod; 32. First connecting plate; 33. First fixing plate; 34. Rotating assembly; 35. Forming assembly; 36. Second connecting plate; 37. Guide rod; 38. Third connecting plate; 39. Return spring; 310. First heat sealing block; 311. First heating plate; 312. First temperature sensor; 341. Linkage plate; 342. First linkage rod; 343. Second linkage rod; 344. Rotating rod; 351. Fourth connecting plate; 352. Sliding hole; 353. Second fixing plate; 354. Second heating plate; 355. Second heat sealing block; 356. Second temperature sensor. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please see Figure 1-5 This utility model provides a technical solution:

[0026] A plastic bag forming device includes an installation plate 1, a support plate 2 fixedly connected to the upper left part of the installation plate 1, a main body mechanism 3 fixedly connected to the middle left part of the support plate 2, a limit plate 4 fixedly connected to the upper right part of the installation plate 1, and a groove 5 opened in the middle right part of the limit plate 4.

[0027] In this embodiment, the main body mechanism 3 includes an electric push rod 31. The output end of the electric push rod 31 passes through the support plate 2 and is fixedly connected to a first connecting plate 32. Guide rods 37 are fixedly connected to the front and rear right ends of the first connecting plate 32. A first fixing plate 33 is fixedly connected to the middle right end of the first connecting plate 32. A second connecting plate 36 is fixedly connected to the right end of the guide rods 37. A return spring 39 is sleeved on the right side of the outer surface of the guide rods 37. A third connecting plate 38 is fixedly connected to the left ends of the two return springs 39. A first heating plate 311 is fixedly connected to the middle left end of the third connecting plate 38. A first heat sealing block 310 is fixedly connected to the middle left end of the first heating plate 311. A first temperature sensor 312 is provided at the front upper end of the first heating plate 311. A molding component 35 is slidably connected to the middle outer surface of the guide rods 37. The middle of the inner wall of the first fixing plate 33 is movably connected via a rotating shaft. A rotating assembly 34 is connected to the electric push rod 31, which is fixedly connected to the middle of the left end of the support plate 2. The rotating assembly 34 includes a linkage plate 341, and a rotating rod 344 is fixedly connected to the middle of the upper end of the linkage plate 341. The left and right walls of the linkage plate 341 are respectively movably connected to the first linkage rod 342 and the second linkage rod 343 via a rotating shaft. The linkage plate 341 is located in the groove 5. The forming assembly 35 includes a fourth connecting plate 351. The front and rear right ends of the fourth connecting plate 351 are both provided with through sliding holes 352. The middle of the left end of the fourth connecting plate 351 is fixedly connected to the second fixing plate 353. The right end of the fourth connecting plate 351 is fixedly connected to the second heating plate 354. The front of the upper end of the second heating plate 354 is provided with a second temperature sensor 356. The middle of the right end of the second heating plate 354 is fixedly connected to the second heat sealing block 355. The fourth connecting plate 351 is slidably connected to the outer surface of the guide rod 37. The left side of the first linkage rod 342 is movably connected to the first fixed plate 33 via a rotating shaft, and the right side of the second linkage rod 343 is movably connected to the second fixed plate 353 via a rotating shaft. The upper and lower ends of the rotating rod 344 are movably connected to the upper and lower groove walls of the groove 5 via bearings, respectively. The other end of the return spring 39 is fixedly connected to the left wall of the second connecting plate 36. The third connecting plate 38 is movably connected to the outer surface of the guide rod 37. The first heating plate 311 is located directly to the right of the second heating plate 354. The middle parts of the outer surfaces of the two guide rods 37 are respectively movably connected to the front and rear right ends of the limiting plate 4. The fourth connecting plate 351 achieves horizontal displacement through the sliding fit of the sliding hole 352 with the guide rod 37, and the inner diameter of the sliding hole 352 is adapted to the outer diameter of the guide rod 37.

[0028] Through the above scheme: when the product is placed into the packaging bag, the packaging bag enters between the first heating plate 311 and the second heating plate 354. The electric push rod 31 is activated, and its output end passes through the support plate 2 to push the first connecting plate 32 to move to the right. The first connecting plate 32 drives the guide rods 37 at the front and rear of the right end and the first fixing plate 33 at the middle of the right end to move to the right. The guide rods 37 pass through the front and rear of the right end of the limiting plate 4 to ensure the stability of the movement. At the same time, the first fixing plate 33 drives the linkage plate 341 located in the groove 5 of the rotating assembly 34 to rotate around the rotating rod 344 through the rotating shaft. The first linkage rod 342 and the second linkage rod 343 on the left and right sides of plate 41 respectively drive the first fixed plate 33 and the second fixed plate 353 in the molding assembly 35, so that the fourth connecting plate 351 of the molding assembly 35 slides along the guide rod 37 through the sliding hole 352. The fourth connecting plate 351 drives the second heating plate 354 and the second heat sealing block 355 at the right end to move to the right. At this time, the return spring 39 sleeved on the right side of the outer surface of the right end of the first connecting plate 32 acts on the third connecting plate 38, so that the third connecting plate 38 slides on the guide rod 37 and drives the first heating plate 31 at the middle of the left end. 1. The first heat-sealing block 310 at the left end of the first heating plate 311 moves to the left. When the first heat-sealing block 310 contacts the plastic film with the second heat-sealing block 355, the first temperature sensor 312 at the front of the upper end of the first heating plate 311 and the second temperature sensor 356 at the front of the upper end of the second heating plate 354 are both PT100 resistance temperature sensors with a measurement accuracy of ±0.1℃. They are adaptable to a temperature range of -200℃ to +600℃, monitor and maintain a heat-sealing temperature of 180-220℃ in real time, and complete the heat-sealing of the plastic film. Subsequently, the electric push rod 31 retracts, and the reset spring... Spring 39 drives the third connecting plate 38, the first heating plate 311, and the first heat sealing block 310 to reset to the left. The rotating component 34 is linked to reset the forming component 35, and the device returns to its initial state. This scheme achieves synchronous displacement of the two heating plates through the linkage structure of electric push rod 31 and rotating component 34. The guide rod 37 and the limiting plate 4 ensure the motion accuracy. The reset spring 39 achieves automatic reset. The PT100 temperature sensor accurately controls the temperature, ensuring heat sealing efficiency and sealing performance. The structure is compact and easy to operate, which can effectively improve the automation level and heat sealing quality of packaging production.

[0029] It should be noted that this utility model is a plastic bag forming device. In use, the machine first fills the entire packaging bag with the product. When the packaging bag enters between the first heating plate 311 and the second heating plate 354, the electric push rod 31 is activated, and its output end pushes the first connecting plate 32 to move to the right. The first connecting plate 32 drives the guide rod 37 and the first fixing plate 33 to move to the right. The guide rod 37 passes through the front and rear of the right end of the limiting plate 4 to ensure the stability of the movement. Simultaneously, the first fixing plate 33 drives the linkage plate 341 in the rotating assembly 34 to rotate within the groove 5 via a rotating shaft. The first linkage rod 342 and the second linkage rod 343 on the linkage plate 341 respectively drive the first fixing plate 33 and the second fixing plate 353 in the forming assembly 35, causing the fourth connecting plate 351 in the forming assembly 35 to slide along the guide rod 37. The fourth connecting plate 351 drives... The second heating plate 354 and the second heat-sealing block 355 move to the right. At this time, the return spring 39 at the right end of the first connecting plate 32 is sleeved on the guide rod 37, and the third connecting plate 38 slides on the guide rod 37. The first heating plate 311 and the first heat-sealing block 310 move to the left with the third connecting plate 38. When the first heat-sealing block 310 and the second heat-sealing block 355 contact the plastic film, the first heating plate 311 and the second heating plate 354 monitor the temperature through the first temperature sensor 312 and the second temperature sensor 356 respectively and maintain a suitable heat-sealing temperature to heat-seal the plastic film. After completion, the electric push rod 31 retracts, the return spring 39 resets and drives the third connecting plate 38, the first heating plate 311, and the first heat-sealing block 310 to move to the left. The rotating component 34 is linked to reset the forming component 35 to the left, and the entire device returns to the initial state, ready for the next forming operation.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plastic bag forming device, comprising a mounting plate (1), characterized in that: The upper left of the mounting plate (1) is fixedly connected to a support plate (2), the middle of the left end of the support plate (2) is fixedly connected to a main body mechanism (3), the upper right of the mounting plate (1) is fixedly connected to a limiting plate (4), and the middle of the right end of the limiting plate (4) has a groove (5). The main body (3) includes an electric push rod (31). The output end of the electric push rod (31) passes through the support plate (2) and is fixedly connected to a first connecting plate (32). The front and rear right ends of the first connecting plate (32) are both fixedly connected to guide rods (37). The middle right end of the first connecting plate (32) is fixedly connected to a first fixing plate (33). The right ends of the guide rods (37) are jointly fixedly connected to a second connecting plate (36). The right side of the outer surface of the guide rods (37) is fitted with a return spring (39). The left ends of the two return springs (39) are jointly fixedly connected to... There is a third connecting plate (38), and a first heating plate (311) is fixedly connected to the middle of the left end of the third connecting plate (38). A first heat sealing block (310) is fixedly connected to the middle of the left end of the first heating plate (311). A first temperature sensor (312) is provided at the front of the upper end of the first heating plate (311). A forming component (35) is slidably connected to the middle of the outer surface of the guide rod (37). A rotating component (34) is movably connected to the middle of the inner wall of the first fixed plate (33) through a rotating shaft. The electric push rod (31) is fixedly connected to the middle of the left end of the support plate (2).

2. The plastic bag forming device according to claim 1, characterized in that: The rotating assembly (34) includes a linkage plate (341), and a rotating rod (344) is fixedly connected to the upper middle part of the linkage plate (341). The left and right walls of the linkage plate (341) are respectively movably connected by a first linkage rod (342) and a second linkage rod (343) through a rotating shaft. The linkage plate (341) is located in the groove (5).

3. The plastic bag forming device according to claim 1, characterized in that: The molding component (35) includes a fourth connecting plate (351). The front and rear right ends of the fourth connecting plate (351) are both provided with through sliding holes (352). A second fixing plate (353) is fixedly connected to the middle left end of the fourth connecting plate (351). A second heating plate (354) is fixedly connected to the right end of the fourth connecting plate (351). A second temperature sensor (356) is provided at the front upper end of the second heating plate (354). A second heat sealing block (355) is fixedly connected to the middle right end of the second heating plate (354). The fourth connecting plate (351) is slidably connected to the outer surface of the guide rod (37).

4. The plastic bag forming device according to claim 2, characterized in that: The left side of the first linkage rod (342) is movably connected to the first fixed plate (33) via a rotating shaft, and the right side of the second linkage rod (343) is movably connected to the second fixed plate (353) via a rotating shaft. The upper and lower ends of the rotating rod (344) are respectively movably connected to the upper and lower groove walls of the groove (5) via bearings.

5. The plastic bag forming apparatus according to claim 1, characterized in that: The other end of the reset spring (39) is fixedly connected to the left wall of the second connecting plate (36), and the third connecting plate (38) is movably connected to the outer surface of the guide rod (37) through the third connecting plate (38). The first heating plate (311) is located directly to the right of the second heating plate (354).

6. The plastic bag forming apparatus according to claim 1, characterized in that: The outer surfaces of the two guide rods (37) are respectively interlaced and movably connected to the front right end and the rear right end of the limiting plate (4).

7. A plastic bag forming apparatus according to claim 3, characterized in that: The fourth connecting plate (351) achieves horizontal displacement through the sliding fit between the sliding hole (352) and the guide rod (37), and the inner diameter of the sliding hole (352) is adapted to the outer diameter of the guide rod (37).

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