A cutting device for manufacturing plastic products

Abstract

This utility model discloses a cutting device for manufacturing plastic products, relating to the field of plastic product technology. It includes a conveyor frame with a support platform having cutting grooves. Conveyor belts are installed on both sides of the support platform. A support bracket for a lifting assembly on the support platform is fixedly mounted on the conveyor frame. An electric telescopic rod is mounted on the support bracket, with its output end connected to a lifting plate. A blade is installed in a fixed bracket at the bottom of the lifting plate. A fixed assembly mounted on the lifting plate includes a vertical slide rod with a pressure plate fixedly connected to its bottom. The slide rod slides through the lifting plate, and a limit plate is provided at the top of the slide rod. The limit plate is connected to the lifting plate via a first spring. When the electric telescopic rod drives the lifting plate to descend, the pressure plate contacts the plastic sheet first. At this time, the spring is in its normal state, allowing the lifting plate to continue descending while the pressure plate maintains a stable clamping hold on the plastic sheet. This avoids the problem of the plastic sheet becoming instantly taut due to rigid downward pressure, preventing timely cutting.

Description

Technical Field

[0001] This utility model relates to the field of plastic products technology, specifically to a cutting device for manufacturing plastic products. Background Technology

[0002] Plastic woven bags belong to the category of plastic products and are used for packaging. Their raw materials are generally various chemical plastic raw materials such as polyethylene and polypropylene. In the production process, the raw materials are first pressed into sheets and then woven into a whole sheet. Then, they are transported to the cutting device through a conveying device for quantitative cutting. Next, the cut composite plastic sheets are sent to the sewing device for sewing into woven bags.

[0003] Chinese utility model patent application number 202322481247.7 provides a cutting device for manufacturing plastic products. By setting a support seat, a movable seat, and a cutting seat, the device facilitates the following operation: when the cutting position of the plastic sheet moves between the cutting seat and the cutting blade, the hydraulic cylinder is activated to drive the movable seat downward. This allows the movable seat to clamp the two ends of the cutting part through the pressure plate and the support plate. When the movable seat continues to move, it will stretch the two ends of the plastic sheet under the obstruction of the cutting seat, so as to facilitate the subsequent cutting by the cutting blade. This solves the problem that the plastic sheet folding in traditional cutting devices affects the cutting quality and product quality.

[0004] However, during the use of the above equipment, it was found that when the pressure plate presses down and the support plate descends, the cutting blade can align with the cutting groove to cut the plastic sheet. The equipment stretches both ends of the plastic sheet by pressing down the pressure plate, but the degree of stretching depends on the tightness of the plastic sheet. If the plastic sheet is hard or thick, the clamping and pressing down of the pressure plate and support plate will cause the plastic sheet to be in a taut state in advance, which will result in the cutting blade fixed on the movable seat failing to contact the cutting groove to cut the plastic sheet. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cutting device for manufacturing plastic products, which solves the problems of the cutting device for manufacturing plastic products mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cutting device for manufacturing plastic products, comprising a conveyor frame, a support platform within the conveyor frame, a cutting groove in the support platform, conveyor belts on both the left and right sides of the support platform, a lifting assembly mounted on the support platform, a bracket in the lifting assembly fixedly mounted on the conveyor frame, an electric telescopic rod mounted on the bracket, a lifting plate connected to the output end of the electric telescopic rod, a fixing frame at the bottom of the lifting plate, a blade mounted in the fixing frame, a fixing assembly mounted on the lifting plate, the fixing assembly including a vertical slide rod, a pressure plate fixedly connected to the bottom of the slide rod, the slide rod sliding through the lifting plate, a limit plate at the top of the slide rod, and the limit plate connected to the lifting plate via a first spring.

[0007] Preferably, there are two sets of pressure plates, which are located on the left and right sides of the cutting groove, and the cutting groove corresponds to the blade.

[0008] Preferably, the lifting plate is provided with symmetrical tensioning components on its left and right sides. Each tensioning component includes a connecting frame, which is fixedly installed on the slide rod. A tensioning plate is rotatably installed in the connecting frame, and the tensioning plate is connected to the connecting frame by a second spring.

[0009] Preferably, the tension plate is inclined away from the slide bar.

[0010] Preferably, the bottom end of the stretching plate is lower than the bottom end of the pressure plate.

[0011] This utility model provides a cutting device for manufacturing plastic products. It has the following advantages:

[0012] (1) This utility model uses an electric telescopic rod to drive the lifting plate to descend. The pressure plate first contacts the plastic sheet. At this time, the spring is in normal state, allowing the lifting plate to continue to descend while the pressure plate maintains a stable clamping of the plastic sheet. This avoids the problem of the plastic sheet being instantly tightened due to rigid downward pressure but unable to be cut in time. It ensures that when the plastic sheet has been pressed tightly on the support platform, the cutting blade can still move down synchronously with the lifting plate and can quickly align and contact.

[0013] (2) In this utility model, the stretching plate is inclined away from the slide bar, so that when the stretching plate contacts the plastic sheet, it forms an oblique tension. This tension can be decomposed into a horizontal tension force and a vertical downward pressure. The horizontal force is used to straighten the plastic sheet, and the vertical force assists the pressure plate to enhance the clamping stability. The two work together to make the plastic sheet more uniformly tight in the cutting area. Attached Figure Description

[0014] Figure 1 This is a diagram showing the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Structural diagram of the lifting assembly;

[0016] Figure 3 This utility model Figure 2 Structural diagram of the fixed component in the middle;

[0017] Figure 4 This utility model Figure 2 Structural diagram of the tensioning component.

[0018] In the diagram, 1 is the conveyor frame; 2 is the conveyor belt.

[0019] 3. Support platform; 31. Groove;

[0020] 4. Lifting assembly; 41. Bracket; 42. Electric telescopic rod; 43. Lifting platform; 431. Fixing frame;

[0021] 5. Fixing components; 51. Slide rod; 52. Pressure plate; 53. First spring; 54. Limiting plate;

[0022] 6. Tension assembly; 61. Connecting frame; 62. Tension plate; 63. Second spring;

[0023] 7. Blade. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Please see Figures 1-4This utility model provides a cutting device for manufacturing plastic products, including a conveyor frame 1, a support platform 3 in the conveyor frame 1, a cutting groove 31 in the support platform 3, conveyor belts 2 on both the left and right sides of the support platform 3, a lifting assembly 4 on the support platform 3, a bracket 41 in the lifting assembly 4 fixedly installed on the conveyor frame 1, an electric telescopic rod 42 installed on the bracket 41, a lifting plate 43 connected to the output end of the electric telescopic rod 42, a fixing frame 431 at the bottom of the lifting plate 43, a blade 7 installed in the fixing frame 431, a fixing assembly 5 installed on the lifting plate 43, a vertical slide rod 51 in the fixing assembly 5, a pressure plate 52 fixedly connected to the bottom of the slide rod 51, the slide rod 51 sliding through the lifting plate 43, a limit plate 54 at the top of the slide rod 51, and the limit plate 54 connected to the lifting plate 43 by a first spring 53;

[0027] Two sets of pressure plates 52 are provided, and the two sets of pressure plates 52 are located on the left and right sides of the cutting groove 31, which corresponds to the blade 7.

[0028] The lifting plate 43 is provided with symmetrical tensioning components 6 on the left and right sides. The tensioning components 6 include a connecting frame 61, which is fixedly installed on the slide rod 51. A tensioning plate 62 is rotatably installed in the connecting frame 61, and the tensioning plate 62 is connected to the connecting frame 61 through a second spring 63.

[0029] The tension plate 62 is tilted away from the slide bar 51;

[0030] The bottom end of the stretching plate 62 is lower than the bottom end of the pressure plate 52.

[0031] Specifically, the stretching plate 62 is hinged to the connecting frame 61 via the second spring 63 and is inclined away from the slide bar 51, with its bottom end lower than the pressure plate 52. During the pressing of the pressure plate 52, the stretching plate 62 moves down with the slide bar 51. Its bottom end contacts the plastic sheet first and then rotates outward under the elastic force of the second spring 63, applying an oblique pulling force to the plastic sheet. The symmetrically arranged stretching components 6 straighten the plastic sheet on both sides of the cutting groove 31, avoiding folding or twisting caused by uneven local force, and providing a flat and stable reference surface for subsequent cutting.

[0032] When the electric telescopic rod 42 continues to drive the lifting plate 43 to descend, the two sets of pressure plates 52 contact the plastic sheet and press down. The first spring 53 stretches to generate elastic force, and its reaction force pre-fixes the plastic sheet to the surface of the support platform 3. This can provide sufficient downward pressure to ensure that the plastic sheet is tightly attached to the support platform 3. It can also adapt to plastic sheets of different thicknesses or materials through spring deformation, avoiding material damage caused by hard compression. At the same time, in conjunction with the oblique pulling force of the tension plate 62, the fixing effect is further enhanced, preventing the plastic sheet from shifting during cutting.

[0033] As the lifting plate 43 continues to descend, the blade 7 cuts into the cutting groove 31 along with the fixing frame 431. At this time, the plastic sheet is in a taut and fixed state. The cutting force can be applied more evenly to the cutting position, reducing the problem of uneven cutting surface caused by material relaxation, improving cutting accuracy and cross-sectional quality. At the same time, the taut state can reduce the probability of deformation of the plastic sheet during the cutting process, which is especially suitable for processing products such as plastic woven bags with high dimensional accuracy requirements.

[0034] Working principle: Start the conveyor belt 2 and confirm that it runs smoothly. Place the plastic sheet to be cut on the conveyor belt 2 and adjust its position. Raise the lifting plate 43 to the initial height through the electric telescopic rod 42 to ensure that the blade 7 is away from the support table 3 and avoids touching the plastic sheet.

[0035] Conveyor belt 2 transports the plastic sheet to the support platform 3. When the cutting position of the plastic sheet moves to directly above the groove 31, conveyor belt 2 stops running, and electric telescopic rod 42 drives lifting plate 43 to slowly descend. Slide rod 51 moves down with lifting plate 43, driving stretching plate 62 to descend synchronously. Since the bottom of stretching plate 62 is lower than pressure plate 52, its bottom end contacts the surface of the plastic sheet first. At this time, pressure plate 52 has not yet contacted the material. After stretching plate 62 contacts the plastic sheet, it continues to descend with slide rod 51. Under the elastic force of second spring 63, it rotates away from slide rod 51, applying oblique tension to the plastic sheet. The two symmetrical stretching components 6 evenly straighten the plastic sheet on both sides of the groove 31, eliminating wrinkles or looseness.

[0036] As the lifting plate 43 continues to descend, the two sets of pressure plates 52 contact the plastic sheet and press down. The first spring 53 is stretched, generating an elastic reaction force that tightly adheres the plastic sheet to the surface of the support platform 3. Once the pressure plates 52 have completely fixed the plastic sheet, the electric telescopic rod 42 continues to apply force, driving the lifting plate 43 to descend further. The blade 7, along with the fixing frame 431, cuts into the cutting groove 31. Because the plastic sheet has been stretched taut by the tension plate 62 and fixed by the pressure plates 52, the cutting force is evenly applied to the cutting position, ensuring a flat cross-section and accurate dimensions.

[0037] After the blade 7 fully cuts into the groove 31, the electric telescopic rod 42 drives the lifting plate 43 to rise and reset. The stretching plate 62 and the pressure plate 52 are lifted along with the slide rod 51, and the conveyor belt 2 restarts to transport the cut plastic sheet to the next process.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cutting device for manufacturing plastic products, comprising a conveyor frame (1), wherein a support platform (3) is provided in the conveyor frame (1), a cutting groove (31) is provided in the support platform (3), and conveyor belts (2) are provided on both the left and right sides of the support platform (3), characterized in that: A lifting assembly (4) is installed on the support platform (3). The bracket (41) in the lifting assembly (4) is fixedly installed on the conveyor frame (1). An electric telescopic rod (42) is installed on the bracket (41). The output end of the electric telescopic rod (42) is connected to a lifting plate (43). A fixing frame (431) is provided at the bottom of the lifting plate (43). A blade (7) is installed in the fixing frame (431). A fixing assembly (5) is installed on the lifting plate (43). The fixing assembly (5) includes a vertical slide rod (51). A pressure plate (52) is fixedly connected to the bottom of the slide rod (51). The slide rod (51) slides through the lifting plate (43). A limit plate (54) is provided at the top of the slide rod (51). The limit plate (54) is connected to the lifting plate (43) through a first spring (53).

2. The cutting equipment for manufacturing plastic products according to claim 1, characterized in that: The pressure plate (52) is provided in two sets, and the two sets of pressure plates (52) are located on the left and right sides of the cutting groove (31), and the cutting groove (31) corresponds to the blade (7).

3. The cutting equipment for manufacturing plastic products according to claim 1, characterized in that: The lifting plate (43) is provided with symmetrical tensioning components (6) on its left and right sides. The tensioning components (6) include a connecting frame (61), which is fixedly installed on the slide rod (51). A tensioning plate (62) is rotatably installed in the connecting frame (61), and the tensioning plate (62) is connected to the connecting frame (61) through a second spring (63).

4. The cutting equipment for manufacturing plastic products according to claim 3, characterized in that: The tension plate (62) is tilted away from the slide bar (51).

5. The cutting equipment for manufacturing plastic products according to claim 4, characterized in that: The bottom end of the stretching plate (62) is lower than the bottom end of the pressure plate (52).

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