A flattening mechanism for plastic bag production

Abstract

The utility model provides a kind of flattening mechanism for plastic bag production, including following structure: multiple front stands, the middle part of the front stand is equipped with guide frame up and down, the left and right ends of the guide frame are respectively movably connected with the left and right ends of multiple guide rollers;Mounting bracket, the middle part of the mounting bracket is equipped with auxiliary roller and positioning roller respectively up and down, lifting seat and positioning seat cooperate, the working height of the rear end of guide frame is adjusted, cooperate with the up and down deflection setting of adjusting cylinder to guide frame, the working distance of two guide frames can be increased to obtain variable interval rectangular surface or form feeding conical surface, combined with the combination of multiple front stands, multiple feeding rectangular surface and feeding conical surface can be formed in the front of mounting bracket, provide flattening feeding guide for different size plastic film tube, avoid the laminated condition of plastic film tube in flattening stage.

Description

Technical Field

[0001] This utility model mainly relates to the field of plastic bag production technology, specifically to a flattening mechanism for plastic bag production. Background Technology

[0002] In the plastic bag production process, raw material granules are fed into an extruder to melt and produce plastic film tubes. The plastic film tubes are then conveyed and cooled. After cooling, the plastic film tubes are sent into a rolling mill for flattening. At this point, the flattened plastic film tubes have the initial appearance of plastic bags. The products at this stage can be printed, rolled up, and cut.

[0003] A conveying channel is set between the plastic film tube blowing machine and the flattening machine to provide support and guidance for the conveying of the plastic film tube. The current conveying channel design is usually a fixed frame structure. When producing plastic bags of different sizes, the size of the plastic film tubes varies significantly. At this time, the smaller plastic film tubes are prone to lack of conveying support and protection in the conveying channel, which causes the plastic film tubes to twist and swing in the conveying channel, resulting in stacking in the subsequent flattening process.

[0004] The inventors have proposed a flattening mechanism for plastic bag production. By setting up channels with variable spacing, the mechanism completes the conveying, supporting, and guiding of plastic film tubes, as well as the pre-flattening and guiding treatment before they are fed into the flattening machine, effectively preventing the plastic film tubes from stacking. Utility Model Content

[0005] 1. Technical problem solved by the utility model:

[0006] This utility model provides a flattening mechanism for plastic bag production, which solves the technical problem of insufficient adaptation in the conveying of plastic film tubes in existing equipment.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is: a flattening mechanism for plastic bag production, comprising the following structure:

[0009] Multiple front frames are provided, with guide frames located at the top and bottom of the middle of each front frame. The left and right ends of each guide frame are movably connected to the left and right ends of multiple guide rollers, respectively. A mounting frame is fixedly provided on the rear side of each front frame located at the rear of the front frame queue.

[0010] The mounting frame has auxiliary rollers and positioning rollers respectively located at the top and bottom of its middle section.

[0011] Furthermore, mounting plates are fixedly provided at the top and bottom of the front frame, and adjusting cylinders are movably connected to the outer side of the mounting plates. The output ends of the two adjusting cylinders are respectively movably connected to the outer side of the middle of the two guide frames.

[0012] Furthermore, drive motors are fixedly installed at the top left and right ends of the mounting frame, and lead screws are fixedly installed at the bottom output ends of the drive motors. The top and bottom of the two lead screws are movably connected to the top and bottom left and right ends of the mounting frame, respectively, and lifting seats are threadedly connected to the middle of the lead screws.

[0013] Furthermore, a positioning seat is fixedly provided in the middle of the lifting seat, and two positioning seats form a group. The opposite sides of the two groups of positioning seats are movably connected to the left and right sides of the rear end of the two guide frames, respectively. Slide seats are fixedly provided at both ends of the lifting seat. A linear guide rail is slidably connected to the side of the slide seat facing the mounting frame. The side of the linear guide rail facing the mounting frame is fixedly connected to the outer side of the mounting frame.

[0014] Furthermore, multiple pressure plates are fixedly connected to the top of the left and right ends of the mounting frame by bolts. An adjusting screw is threadedly connected to the middle of the pressure plate. A handwheel is fixed to the top of the adjusting screw. A retaining seat is movably connected to the bottom of the adjusting screw. The outer side of the retaining seat is slidably connected to the top of the mounting frame. The opposite sides of the two retaining seats are movably connected to the left and right ends of the auxiliary roller, respectively.

[0015] Furthermore, the left and right ends of the mounting frame are movably connected to the left and right ends of multiple positioning rollers, respectively, and the front part of the mounting frame extends to the rear of the guide frame.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] This utility model provides a flattening mechanism for plastic bag production. The lifting seat and the positioning seat cooperate to adjust the working height of the rear end of the guide frame. With the help of the adjusting cylinder to set the up and down deflection of the guide frame, the working distance between the two guide frames can be increased to obtain a variable spacing feeding rectangular surface or a feeding conical surface. Combined with the combination of multiple front frames, multiple feeding rectangular surfaces and feeding conical surfaces can be formed at the front of the mounting frame, providing flattening feeding guidance for plastic film tubes of different sizes and avoiding the stacking of plastic film tubes during the flattening stage.

[0019] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0020] Figure 1 This is a perspective view of the structure of this utility model;

[0021] Figure 2 This is a left view of the front frame structure of this utility model;

[0022] Figure 3 This is a half-sectional perspective view of the front frame structure of this utility model;

[0023] Figure 4 This is a utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0024] Figure 5 This is a left sectional view of the front frame structure of this utility model;

[0025] Figure 6 This is a half-sectional perspective view of the mounting frame structure of this utility model;

[0026] Figure 7 This is a perspective view of the mounting bracket structure of this utility model;

[0027] Figure 8 This is a utility model Figure 7 Enlarged view of the structure at point B.

[0028] Figure label:

[0029] 1-Front frame; 11-Mounting plate; 12-Adjusting cylinder;

[0030] 2-Guide frame; 21-Guide roller;

[0031] 3-Mounting frame; 31-Drive motor; 32-Lead screw; 33-Lifting seat; 34-Positioning seat;

[0032] 4-Mounting frame; 41-Auxiliary roller; 42-Positioning roller; 43-Pressure plate; 44-Adjusting screw; 45-Handwheel; 46-Card holder. Detailed Implementation

[0033] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element; the terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] See attached document Figure 1-8 This utility model provides a flattening mechanism for plastic bag production, comprising the following structure:

[0037] Multiple front frames 1, with guide frames 2 located at the top and bottom of the middle of the front frame 1. The left and right ends of the guide frames 2 are movably connected to the left and right ends of multiple guide rollers 21 respectively. An installation frame 3 is fixedly installed on the rear side of the front frame 1 located at the rear of the front frame 1 queue.

[0038] Mounting frame 4, with auxiliary roller 41 and positioning roller 42 respectively located at the top and bottom of the middle part of the mounting frame 4.

[0039] In this embodiment, mounting plates 11 are fixedly provided at the top and bottom of the front frame 1. Adjusting cylinders 12 are movably connected to the outer side of the mounting plates 11. The output ends of the two adjusting cylinders 12 are movably connected to the outer side of the middle of the two guide frames 2 respectively.

[0040] Mounting plate 11 serves as the mounting support for adjusting cylinder 12 at the top and bottom of front frame 1. Adjusting cylinder 12 cooperates with guide frame 2 to complete the up and down deflection of the two guide frames 2 in the middle of front frame 1, and to complete the feeding conical surface formed by the guide rollers 21 at the top and bottom of front frame 1 at the front of mounting frame 4, thus completing the flattening and guiding pretreatment before the plastic film tube is fed between positioning roller 42 and auxiliary roller 41 for flattening.

[0041] In this embodiment, drive motors 31 are fixedly installed at the top left and right ends of the mounting frame 3, and lead screws 32 are fixedly installed at the bottom output end of the drive motors 31. The top and bottom of the two lead screws 32 are movably connected to the top and bottom left and right ends of the mounting frame 3, respectively, and lifting seats 33 are threadedly connected to the middle of the lead screws 32.

[0042] The drive motor 31 drives the lead screw 32 to rotate, which completes the movement of the two lifting seats 33 in the middle of the lead screw 32 towards each other or away from each other. The lifting seats 33 cooperate with the positioning seat 34 to adjust the working height of the rear end of the guide frame 2. With the help of the adjusting cylinder 12 to adjust the up and down deflection of the guide frame 2, the working distance between the two guide frames 2 can be increased to obtain a variable spacing feeding rectangular surface or a feeding conical surface. Combined with the combination of multiple front frames 1, multiple feeding rectangular surfaces and feeding conical surfaces can be formed at the front of the mounting frame 4, providing flattening feeding guidance and flattening pretreatment for plastic film tubes of different sizes, and avoiding the stacking of plastic film tubes during the flattening stage.

[0043] In this embodiment, a positioning seat 34 is fixedly provided in the middle of the lifting seat 33. Two positioning seats 34 form a group. The opposite sides of the two groups of positioning seats 34 are movably connected to the left and right sides of the rear end of the two guide frames 2, respectively. Slide seats are fixedly provided at both ends of the lifting seat 33. A linear guide rail is slidably connected to the side of the slide seat facing the mounting frame 3. The side of the linear guide rail facing the mounting frame 3 is fixedly connected to the outside of the mounting frame 3.

[0044] A slide and a linear guide are provided between the lifting seat 33 and the mounting frame 3 to improve the lifting and sliding stability of the lifting seat 33 on the mounting frame 3.

[0045] In this embodiment, multiple pressure plates 43 are fixedly connected to the top of the left and right ends of the mounting frame 4 by bolts. An adjusting screw 44 is threadedly connected to the middle of the pressure plate 43. A handwheel 45 is fixedly provided on the top of the adjusting screw 44. A card seat 46 is movably connected to the bottom of the adjusting screw 44. The outer side of the card seat 46 is slidably connected to the top of the mounting frame 4. The opposite sides of the two card seats 46 are movably connected to the left and right ends of the auxiliary roller 41, respectively. The left and right ends of the mounting frame 4 are movably connected to the left and right ends of multiple positioning rollers 42, respectively. The front of the mounting frame 4 extends to the rear of the guide frame 2.

[0046] Handwheel 45 drives adjusting screw 44 to rotate and lift on pressure plate 43, changing the working position of card holder 46 on mounting frame 4, completing the adjustment of the working height of auxiliary roller 41 above positioning roller 42, making it convenient for users to increase the working height of auxiliary roller 41 on positioning roller 42 to feed plastic film tube into the equipment. The plastic film tube is flattened between auxiliary roller 41 and positioning roller 42 with the working distance adjusted.

[0047] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A flattening mechanism for producing plastic bags, characterized in that: Includes the following structure: Multiple front frames (1), with guide frames (2) provided in the middle of the front frames (1), and the left and right ends of the guide frames (2) being movably connected to the left and right ends of multiple guide rollers (21) respectively. A mounting frame (3) is fixedly provided on the rear side of the front frames (1) located at the rear of the front frame (1) queue. Mounting frame (4), with auxiliary roller (41) and positioning roller (42) respectively located at the top and bottom of the middle part of the mounting frame (4). The top and bottom of the front frame (1) are both fixed with mounting plates (11), and the outer side of the mounting plate (11) is movably connected with an adjusting cylinder (12). The output ends of the two adjusting cylinders (12) are respectively movably connected to the outer side of the middle of the two guide frames (2).

2. The flattening mechanism for producing plastic bags according to claim 1, characterized in that: The top left and right ends of the mounting frame (3) are fixed with drive motors (31), and the bottom output end of the drive motor (31) is fixed with lead screws (32). The top and bottom of the two lead screws (32) are movably connected to the top and bottom left and right ends of the mounting frame (3), respectively. The middle part of the lead screws (32) is threaded with lifting seats (33).

3. The flattening mechanism for producing plastic bags according to claim 2, characterized in that: The lifting seat (33) is fixedly provided with a positioning seat (34) in the middle. Two positioning seats (34) form a group. The opposite sides of the two groups of positioning seats (34) are movably connected to the left and right sides of the rear end of the two guide frames (2). The left and right ends of the lifting seat (33) are both fixedly provided with slides. The side of the slide facing the mounting frame (3) is slidably connected with a linear guide rail. The side of the linear guide rail facing the mounting frame (3) is fixedly connected to the outside of the mounting frame (3).

4. The flattening mechanism for producing plastic bags according to claim 1, characterized in that: Multiple pressure plates (43) are fixedly connected to the top of the left and right ends of the mounting frame (4) by bolts. An adjusting screw (44) is threadedly connected to the middle of the pressure plate (43). A handwheel (45) is fixedly provided on the top of the adjusting screw (44). A card seat (46) is movably connected to the bottom of the adjusting screw (44). The outer side of the card seat (46) is slidably connected to the top of the mounting frame (4). The opposite sides of the two card seats (46) are movably connected to the left and right ends of the auxiliary roller (41) respectively.

5. The flattening mechanism for producing plastic bags according to claim 1, characterized in that: The left and right ends of the mounting frame (4) are movably connected to the left and right ends of multiple positioning rollers (42), respectively, and the front of the mounting frame (4) extends to the rear of the guide frame (2).

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