A kind of automatic cutting blade positioning assembly of food packaging hot air cover
Patent Information
- Application Number
- CN202522655520.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-15
AI Technical Summary
在食品包装热风盖自动裁切生产中，传统刀片大多仅通过单一的螺栓方式安装在裁切轮上，而裁切机工作时，裁切轮需高速转动完成裁切动作，会持续产生振动，长期处于这种振动环境下，螺栓与螺孔的螺纹贴合面易出现间隙，导致螺栓周向松动，螺栓松动后，刀片失去稳定固定，定位偏差会逐渐扩大，这一偏差直接导致热风盖裁切尺寸误差突破食品包装行业要求的精度标准，使得不合格品率飙升，大量不合格品不仅需要返工重裁，还会浪费包装材料，因此，针对上述问题提出一种食品包装热风盖自动裁切的刀片定位组件
本实用新型中，通过定位组件与安装组件的配合，能有效解决传统刀片螺栓易松动的问题，定位组件可在螺栓固定刀片后，通过齿块与凸齿的啮合限制螺栓周向转动，即便裁切轮高速转动产生持续振动，也能避免螺栓与螺孔出现间隙导致松动，从而稳定保持刀片定位精度，确保热风盖裁切尺寸误差符合行业精度标准，大幅降低不合格品率，减少返工重裁流程与包装材料浪费，同时无需频繁检查螺栓状态，降低维护成本。
Smart Images
Figure CN224914912U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot air cover technology for food packaging, specifically a blade positioning component for automatic cutting of hot air covers for food packaging. Background Technology
[0002] Hot air covers for food packaging are specialized accessories used to seal the openings of food packaging containers (such as plastic cups, bowls, and boxes). The core of the product is to use hot air to heat the product and fuse it to the edge of the container to seal it, thereby achieving the functions of preventing food from moisture and contamination and extending its shelf life. They are widely used in packaging scenarios for ready-to-eat foods such as yogurt, jelly, cooked food, and instant soup. Automatic cutting of hot air caps for food packaging is a specialized process in automated food packaging production lines that precisely cuts rolls or sheets of hot air cap substrate into containers of the corresponding size. The core of this process is the coordinated use of mechanical transmission and precise positioning to achieve uniform cutting dimensions and smooth edges, providing qualified semi-finished products for subsequent hot air sealing processes and meeting the needs of large-scale food packaging production. In the automatic cutting production of hot air caps for food packaging, traditional blades are mostly mounted on the cutting wheel using only a single bolt. When the cutting machine is working, the cutting wheel needs to rotate at high speed to complete the cutting action, which will continuously generate vibration. Under such a vibration environment for a long time, gaps are likely to appear on the threaded contact surface between the bolt and the bolt hole, causing the bolt to loosen circumferentially. After the bolt loosens, the blade loses its stable fixation, and the positioning deviation will gradually increase. This deviation directly causes the cutting dimension error of the hot air cap to exceed the precision standards required by the food packaging industry, resulting in a surge in the defect rate. A large number of defective products not only need to be reworked and recut, but also waste packaging materials. Therefore, a blade positioning component for automatic cutting of hot air caps for food packaging is proposed to address the above problems. Utility Model Content
[0003] The purpose of this invention is to provide a blade positioning component for automatic cutting of hot air caps for food packaging, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A blade positioning assembly for automatically cutting hot air caps for food packaging includes a cutting machine. A cutting wheel is mounted on the top end of the cutting machine. A cutting groove is formed through the center of the cutting wheel. A mounting plate is fixedly connected to the top of the cutting groove. A cutting blade is provided on the rear side of the mounting plate. An installation assembly is provided between the mounting plate and the cutting blade. A positioning assembly is provided above the mounting plate. The positioning assembly includes a positioning box located on the front side of the mounting plate. A movable support plate is provided in the inner cavity of the positioning box. A cam is provided above the movable support plate. A movable support rod is fixedly connected to the bottom center of the movable support plate. The bottom end of the movable support rod movably penetrates the bottom wall of the positioning box, and a positioning tooth block is fixedly connected to the bottom end of the movable support rod.
[0005] As a further optimization of this utility model, the mounting component includes a mounting block fixedly connected to the center of the cutting blade, and the bottom rear side of the mounting support plate has a mounting groove adapted to the mounting block, and the mounting block is embedded in the mounting groove.
[0006] As a further optimization of this utility model, the mounting plate is provided with mounting bolts at the bottom front side, the mounting bolts penetrate the mounting groove, and the mounting block is provided with mounting screw holes that are compatible with the mounting bolts on the front side.
[0007] As a further optimization of this utility model, the head of the mounting bolt is fitted with and fixedly connected to a bolt sleeve, and the outer side of the bolt sleeve is fixedly connected to a plurality of positioning protrusions arranged in a circumferential array.
[0008] As a further optimization of this utility model, a drive rod is connected through and fixedly connected to the center of the cam, the rear end of the drive rod passes through the rear wall of the positioning box and is rotatably connected to the front wall of the mounting plate, and the front end of the drive rod passes through the front wall of the positioning box and is fixedly connected to a self-locking knob.
[0009] As a further optimization of this utility model, the movable support rod is provided with symmetrical return springs on both sides, and the upper and lower ends of the return springs are fixedly connected to the bottom of the movable support plate and the inner bottom wall of the positioning box, respectively.
[0010] As a further optimization of this utility model, when the mounting bolt is screwed into the mounting screw hole to install the cutting blade, the positioning tooth block is located directly above the bolt sleeve, and the positioning tooth block is engaged with the positioning convex tooth.
[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the cooperation between the positioning component and the mounting component effectively solves the problem of easy loosening of traditional blade bolts. After the bolt fixes the blade, the positioning component restricts the circumferential rotation of the bolt through the meshing of the tooth block and the convex tooth. Even if the cutting wheel rotates at high speed and generates continuous vibration, it can prevent the bolt from loosening due to gaps between the bolt and the screw hole, thereby stabilizing the positioning accuracy of the blade, ensuring that the cutting size error of the hot air cover meets the industry accuracy standard, greatly reducing the defect rate, reducing rework and recutting processes and waste of packaging materials, and eliminating the need for frequent bolt checks, thus reducing maintenance costs. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cutting wheel of this utility model; Figure 3This is a schematic diagram of the structure of the cutting blade of this utility model; Figure 4 This is an assembly drawing of the cutting blade of this utility model; Figure 5 This utility model Figure 4 A schematic diagram of the backward structure; Figure 6 This is a cross-sectional view of the positioning component of this utility model.
[0013] In the diagram: 1. Cutting machine; 2. Cutting wheel; 3. Cutting groove; 4. Mounting support plate; 5. Cutting blade; 6. Mounting assembly; 61. Mounting block; 62. Mounting groove; 63. Mounting bolt; 64. Mounting screw hole; 65. Bolt sleeve; 66. Positioning tooth; 7. Positioning assembly; 71. Positioning box; 72. Movable support plate; 73. Cam; 74. Movable support rod; 75. Positioning tooth block; 76. Drive rod; 77. Self-locking knob; 78. Return spring. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0016] Please see Figures 1-6 This utility model provides a technical solution: A blade positioning assembly for automatically cutting hot air caps for food packaging includes a cutting machine 1. A cutting wheel 2 is installed at one top end of the cutting machine 1. A cutting groove 3 is formed through the center of the cutting wheel 2. A mounting plate 4 is fixedly connected to the top of the inner part of the cutting groove 3. A cutting blade 5 is provided on the rear side of the mounting plate 4. An installation assembly 6 is provided between the mounting plate 4 and the cutting blade 5. A positioning assembly 7 is provided above the mounting plate 4. The positioning assembly 7 includes a positioning box 71 located on the front side of the mounting plate 4. A movable support plate 72 is provided in the inner cavity of the positioning box 71. A cam 73 is provided above the movable support plate 72. A movable support rod 74 is fixedly connected to the bottom center of the movable support plate 72. The bottom end of the movable support rod 74 movably penetrates the bottom wall of the positioning box 71, and a positioning tooth block 75 is fixedly connected to the bottom end of the movable support rod 74.
[0017] It should be noted that: the cutting machine 1 provides a cutting base for the hot air cover of food packaging, the cutting groove 3 of the cutting wheel 2 provides installation space for the cutting blade 5 and provides a cutting path for the hot air cover substrate, the mounting component 6 is used to fix the cutting blade 5, and the positioning component 7 ensures that the cutting blade 5 is in a stable position after installation by meshing the positioning tooth block 75 with the positioning protrusion 66, so as to avoid the deviation during cutting and affect the accuracy. As a further implementation of this solution, the mounting component 6 includes a mounting block 61 fixedly connected to the center of the cutting blade 5, and a mounting groove 62 adapted to the mounting block 61 is provided on the rear bottom of the mounting support plate 4, and the mounting block 61 is embedded in the mounting groove 62. It should be noted that the mounting block 61 of the mounting component 6 is compatible with the mounting groove 62, which can quickly achieve the initial positioning of the cutting blade 5 and the mounting support plate 4. The embedded installation method can reduce the shaking of the cutting blade 5 and lay the foundation for subsequent precise fixing. As a further implementation of this solution, the bottom front side of the mounting plate 4 is provided with mounting bolts 63, which penetrate the mounting groove 62. The front side of the mounting block 61 is provided with mounting screw holes 64 that are compatible with the mounting bolts 63. A bolt sleeve 65 is fitted and fixedly connected to the outer side of the head of the mounting bolt 63. Multiple positioning protrusions 66 arranged in a circular array are fixedly connected to the outer side of the bolt sleeve 65. It should be noted that after the mounting bolt 63 is screwed into the mounting screw hole 64, the mounting block 61 can be firmly fixed in the mounting groove 62. The positioning protrusion 66 on the bolt sleeve 65 cooperates with the positioning tooth block 75 to restrict the loosening of the mounting bolt 63, further ensuring the installation stability of the cutting blade 5. As a further implementation of this solution, a drive rod 76 is connected through and fixedly connected to the center of the cam 73. The rear end of the drive rod 76 passes through the rear wall of the positioning box 71 and is rotatably connected to the front wall of the mounting plate 4. The front end of the drive rod 76 passes through the front wall of the positioning box 71 and is fixedly connected to a self-locking knob 77 at this end. It should be noted that: the drive rod 76 can drive the cam 73 to rotate, thereby controlling the movable support plate 72 and the movable support rod 74 to move up and down. The self-locking knob 77 can fix the position of the drive rod 76, ensuring that the positioning tooth block 75 can stably engage or disengage from the positioning convex tooth 66, which is convenient for operation. As a further implementation of this solution, the movable support rod 74 is symmetrically provided with return springs 78 on both sides, and the upper and lower ends of the return springs 78 are fixedly connected to the bottom of the movable support plate 72 and the inner bottom wall of the positioning box 71, respectively. It should be noted that the return spring 78 plays a reset role on the movable support plate 72. When the cam 73 no longer presses the movable support plate 72, the return spring 78 can push the movable support plate 72 to move upward, causing the positioning tooth block 75 to disengage from the positioning protrusion 66, which facilitates the disassembly or adjustment of the cutting blade 5. As a further implementation of this solution, after the mounting bolt 63 is screwed into the mounting screw hole 64 to install the cutting blade 5, the positioning tooth block 75 is located directly above the bolt sleeve 65, and the positioning tooth block 75 is engaged with the positioning protrusion 66. It should be noted that the meshing relationship between the positioning tooth block 75 and the positioning protrusion 66 can lock the mounting bolt 63 after the cutting blade 5 is installed, preventing it from loosening due to cutting vibration, ensuring that the cutting blade 5 is always in a precise cutting position, and improving the cutting quality.
[0018] Workflow: Before installing the cutting blade 5, the positioning component 7 needs to be adjusted so that the positioning tooth block 75 moves upward, leaving space for the installation component 6. The operator holds the self-locking knob 77 of the positioning component 7 and rotates the drive rod 76 counterclockwise. The drive rod 76 drives the cam 73 to rotate synchronously. The cam 73 gradually changes from "long diameter end facing the movable support plate 72" to "short diameter end facing the movable support plate 72". The downward pressure on the movable support plate 72 disappears, and the return springs 78 on both sides rebound and extend, pushing the movable support plate 72 to slide longitudinally upward along the inner wall of the positioning box 71. The movable support rod 74 drives the positioning tooth block 75 to move upward until the bottom of the positioning tooth block 75 is higher than the head of the mounting bolt 63 on the front side of the mounting support plate 4. At this time, the self-locking knob 77 is locked to fix the high position of the positioning tooth block 75 and prevent it from obstructing the subsequent operation of the installation component 6. After the positioning component 7 is pre-adjusted, the cutting blade 5 and the mounting plate 4 are precisely fixed by the mounting component 6: The operator holds the cutting blade 5 and aligns the mounting block 61 at its center with the mounting groove 62 at the bottom rear side of the mounting plate 4. The blade is then pushed horizontally into the mounting groove 62. The mounting block 61 and the mounting groove 62 fit together to achieve initial positioning. The cutting edge of the cutting blade 5 is aligned with the cutting groove 3 of the cutting wheel 2 to ensure accurate cutting path. The mounting bolt 63 is then taken and inserted into the through mounting groove 62 from the front side of the mounting plate 4. It is aligned with the mounting screw hole 64 of the mounting block 61 and turned clockwise to tighten. The mounting block 61 is pressed into the mounting groove 62 until the head of the mounting bolt 63 fits against the front side of the mounting plate 4. At this time, the bolt sleeve 65 on the outer side of the head of the mounting bolt 63 is in place, and the positioning protrusion 66 on its outer side is located directly below the positioning tooth block 75, preparing for subsequent positioning and locking. After the cutting blade 5 is fixed, the positioning component 7 moves the positioning tooth block 75 downward to engage with the positioning protrusion 66 of the bolt sleeve 65, preventing the bolt from loosening due to cutting vibration. The operator turns the self-locking knob 77 clockwise to release the lock on the drive rod 76. The clockwise rotation of the drive rod 76 drives the cam 73 to rotate. The long diameter end of the cam 73 gradually moves towards the movable support plate 72, applying downward pressure to the movable support plate 72 and compressing the return spring 78. The movable support plate 72 slides longitudinally downward along the inner wall of the positioning box 71, and the positioning tooth block 75 moves downward through the movable support rod 74 until the positioning tooth block 75 is fully engaged with the positioning protrusion 66 on the outer side of the bolt sleeve 65. At this time, the positioning tooth block 75 and the positioning protrusion 66 are locked together, restricting the circumferential rotation of the mounting bolt 63. Even if the cutting wheel 2 vibrates when the cutting machine 1 is working, the mounting bolt 63 will not loosen. When the cutting blade 5 needs to be replaced or adjusted, the positioning component 7 is operated in reverse to move the positioning tooth block 75 upward and disengage it from the positioning protrusion 66. The self-locking knob 77 is rotated counterclockwise to drive the drive rod 76 and cam 73 to rotate in opposite directions. The short diameter end of cam 73 faces the movable support plate 72, and the pressure on the movable support plate 72 is removed. The return spring 78 rebounds and pushes the movable support plate 72 to slide upward. The positioning tooth block 75 is moved upward through the movable support rod 74, completely disengaging from the positioning protrusion 66 and releasing the circumferential restriction on the mounting bolt 63. The mounting bolt 63 is rotated counterclockwise to remove it from the mounting screw hole 64. Then, the mounting block 61 is pulled out from the mounting groove 62 in the horizontal direction. The cutting blade 5 is removed for replacement or maintenance. After maintenance, the "preliminary positioning - bolt fixing - tooth block downward engagement" process is repeated to reinstall. The whole process is short and easy to operate, greatly improving maintenance efficiency.
[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A blade positioning assembly for automatic cutting of hot air caps for food packaging, comprising a cutting machine (1), characterized in that: The cutting machine (1) has a cutting wheel (2) installed at one end of its top. A cutting groove (3) is opened through the center of the cutting wheel (2). A mounting plate (4) is fixedly connected to the top of the cutting groove (3). A cutting blade (5) is provided on the rear side of the mounting plate (4). An installation component (6) is provided between the mounting plate (4) and the cutting blade (5). A positioning component (7) is provided above the mounting plate (4). The positioning component (7) includes a positioning box (71) disposed on the front side of the mounting plate (4). The inner cavity of the positioning box (71) is provided with a movable support plate (72). A cam (73) is provided above the movable support plate (72). A movable support rod (74) is fixedly connected at the bottom center of the movable support plate (72). The bottom end of the movable support rod (74) movably penetrates the bottom wall of the positioning box (71), and a positioning tooth block (75) is fixedly connected to the bottom end of the movable support rod (74).
2. The blade positioning assembly for automatic cutting of hot air caps for food packaging according to claim 1, characterized in that: The mounting assembly (6) includes a mounting block (61) fixedly connected to the center of the cutting blade (5). The bottom rear side of the mounting support plate (4) is provided with a mounting groove (62) adapted to the mounting block (61). The mounting block (61) is embedded in the mounting groove (62).
3. The blade positioning assembly for automatic cutting of hot air caps for food packaging according to claim 2, characterized in that: The mounting plate (4) has a mounting bolt (63) at the bottom front side. The mounting bolt (63) passes through the mounting groove (62), and the mounting block (61) has a mounting screw hole (64) on the front side that is compatible with the mounting bolt (63).
4. The blade positioning assembly for automatic cutting of hot air caps for food packaging according to claim 3, characterized in that: The head of the mounting bolt (63) is fitted with and fixedly connected to a bolt sleeve (65), and the outer side of the bolt sleeve (65) is fixedly connected to a plurality of positioning protrusions (66) arranged in a circumferential array.
5. The blade positioning assembly for automatic cutting of hot air caps for food packaging according to claim 1, characterized in that: A drive rod (76) is fixedly connected through the center of the cam (73). The rear end of the drive rod (76) passes through the rear wall of the positioning box (71) and is rotatably connected to the front wall of the mounting plate (4). The front end of the drive rod (76) passes through the front wall of the positioning box (71) and is fixedly connected to a self-locking knob (77).
6. The blade positioning assembly for automatic cutting of hot air caps for food packaging according to claim 1, characterized in that: The movable support rod (74) is symmetrically provided with return springs (78) on both sides. The upper and lower ends of the return springs (78) are fixedly connected to the bottom of the movable support plate (72) and the inner bottom wall of the positioning box (71), respectively.
7. The blade positioning assembly for automatic cutting of hot air caps for food packaging according to claim 4, characterized in that: When the mounting bolt (63) is screwed into the mounting screw hole (64) to install the cutting blade (5), the positioning tooth block (75) is located directly above the bolt sleeve (65), and the positioning tooth block (75) is engaged with the positioning protrusion (66).