Quick change die holder for hot air cap die cutting of offset food packaging

Abstract

The utility model relates to offset food packaging equipment technical field, especially for a kind of quick replacement cutter die chuck of offset food packaging hot air cover punching, including operating plate, and the top of operating plate is provided with feeding mechanism, and the outside of operating plate is installed cutter die body, and the outside of cutter die body is provided with rotating slot, and the outside of cutter die body is provided with rotating clamping mechanism, and the top of rotating clamping mechanism is provided with guide mechanism, and rotating clamping mechanism includes clamping groove, and the outside of clamping groove is fixedly connected with movable pipe, and movable pipe is movably clamped with moving rod, and one spring is set on moving rod, and the outside of moving rod is fixedly connected with ball, in the utility model, when installing, cutter die is inserted into clamping groove and rotates, ball is clamped into rotating slot by spring thrust, and quick fixing is completed, when disassembling, cutter die is reversely rotated, ball is pressed back into hidden slot, and cutter die can be easily removed.

Description

Technical Field

[0001] This utility model relates to the technical field of offset printing food packaging equipment, specifically a quick-change die clamp for hot air cap punching of offset printing food packaging. Background Technology

[0002] Offset printing of food packaging is increasingly used in the fields of snack food and baked goods due to its advantages such as exquisite printing and strong sealing. As the core sealing component of this type of packaging, the production quality and efficiency of the hot air cap directly affect the competitiveness of the product. Consumers have increasingly higher requirements for the appearance precision of food packaging (such as edge smoothness and size consistency), and die cutting is a key process in the forming of hot air cap. The hot air cap punching process has unique characteristics: the substrate is mostly a combination of composite plastics, coated paper and other materials. Before punching, the substrate needs to be softened by hot air pretreatment to ensure the sealing performance. This means that the die not only has to withstand the punching impact, but also has to adapt to the changes in material properties under heating conditions. Industry data shows that packaging equipment with quick die changing function has become the mainstream demand in the market. Some high-end fields even require the die changing time to be controlled within 30 minutes, which provides a clear direction for the structural innovation of die holders. Traditional die-cutting molds mostly use bolt fastening or wedge block snap-fit ​​structures. When replacing them, special tools such as wrenches and screwdrivers are required. The disassembly and installation process involves 8-12 fastening points. The replacement of a single die-cutting mold usually takes more than 1 hour. For production lines that need to switch specifications 2-3 times a day, the downtime caused by die replacement can reach hundreds of hours per year, directly causing a 15%-20% loss in production capacity. Although some equipment attempts to simplify the fixing structure, due to the lack of guide positioning design, the die-cutting mold needs to be repeatedly adjusted and aligned after installation, which still makes it difficult to meet the needs of high-efficiency production.

[0003] Therefore, a quick-change die chuck for hot air cap die cutting of offset food packaging is proposed to address the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a quick-change die clamp for hot air cap die cutting of offset food packaging, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A quick-change die chuck for hot air cap die cutting of offset food packaging includes a rotating plate, a feeding mechanism on the top of the rotating plate, a die body mounted on the outer side of the rotating plate, a rotating groove on the outer side of one end of the die body, a rotating locking mechanism on the outer side of the die body, and a guide mechanism on the top of the rotating locking mechanism. The rotating snap-fit ​​mechanism includes a snap-fit ​​groove, a movable tube is fixedly connected to the outside of the snap-fit ​​groove, a movable rod is movably snapped inside the movable tube, a compression spring is sleeved on the movable rod, a ball is fixedly connected to the outside of the movable rod, and a hidden groove is formed in the inner wall of the snap-fit ​​groove. The guiding mechanism includes an L-shaped plate, a connecting rod fixedly connected to the bottom of the L-shaped plate, a guide ring fixedly connected to the bottom of the connecting rod, a second compression spring fixedly connected to the inner side of the guide ring, and a rubber ring fixedly connected to the outer side of the second compression spring.

[0006] As a further optimization of this utility model, the feeding mechanism includes a support frame, a feeding roller is rotatably connected inside the support frame, a positioning wheel is provided on the outer side of the support frame, and a discharge trough is fixedly connected to the bottom of the support frame.

[0007] As a further optimization of this utility model, the snap-fit ​​grooves are evenly distributed on the outer side of the operating plate, and the movable tubes are symmetrically distributed on both sides of the snap-fit ​​grooves.

[0008] As a further optimization of this utility model, the die body is installed inside the snap-fit ​​groove, and the moving rod passes through the inner wall of the snap-fit ​​groove.

[0009] As a further optimization of this utility model, the ball bearings are movably and symmetrically distributed inside the snap-fit ​​groove, and the initial position of the ball bearings is inside the hidden groove.

[0010] As a further optimization of this utility model, the ball bearing is adapted to the rotating groove, the L-shaped plate is fixedly connected to the top of the snap-fit ​​groove, and the die body passes through the interior of the guide ring.

[0011] As a further optimization of this utility model, the support frame is fixedly connected to the top of the rotating plate, and the feeding chute is located above the rotating plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are: In this invention, a snap-fit ​​groove provides a precise positioning base for the die-cutting mold. The moving rod inside the movable tube, in conjunction with a compression spring, can drive the ball bearings to flexibly switch between the hidden groove and the rotating groove. During installation, the die-cutting mold is inserted into the snap-fit ​​groove and rotated. The ball bearings are pushed into the rotating groove by the spring, completing a quick fixation. During disassembly, the die-cutting mold is rotated in the opposite direction, and the ball bearings are pressed back into the hidden groove, allowing the die-cutting mold to be easily removed. The entire process requires no complicated tools, significantly shortening the die-cutting mold replacement time, reducing equipment downtime, and improving the overall operating efficiency of the production line. It is especially suitable for batch production scenarios involving the punching of multiple specifications of hot air covers. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the outer structure of the feeding mechanism of this utility model; Figure 3 This is a schematic diagram of the outer side of the rotating snap-fit ​​mechanism and the guide mechanism of this utility model; Figure 4 This is a schematic diagram of the structure between the snap-fit ​​groove and the die body of this utility model; Figure 5 This is a sectional view of the side structure of the snap-fit ​​groove of this utility model; Figure 6 This is a structural development diagram of the guiding mechanism of this utility model.

[0014] In the diagram: 1. Rotating plate; 2. Feeding mechanism; 21. Support frame; 22. Feeding roller; 23. Positioning wheel; 24. Discharge groove; 3. Die body; 31. Rotating groove; 4. Rotating locking mechanism; 41. Locking groove; 42. Movable tube; 43. Moving rod; 44. No. 1 compression spring; 45. Ball bearing; 46. Hidden groove; 5. Guide mechanism; 51. L-shaped plate; 52. Connecting rod; 53. Guide ring; 54. No. 2 compression spring; 55. Rubber ring. Detailed Implementation

[0015] 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.

[0016] 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.

[0017] Please see Figures 1-6 This utility model provides a technical solution: A quick-change die chuck for hot air cap die cutting of offset food packaging includes a rotating plate 1, a feeding mechanism 2 on the top of the rotating plate 1, a die body 3 mounted on the outer side of the rotating plate 1, a rotating groove 31 on the outer side of one end of the die body 3, a rotating locking mechanism 4 on the outer side of the die body 3, and a guide mechanism 5 on the top of the rotating locking mechanism 4. The rotating locking mechanism 4 includes a locking groove 41, a movable tube 42 fixedly connected to the outside of the locking groove 41, a movable rod 43 movably locked inside the movable tube 42, a compression spring 44 sleeved on the movable rod 43, a ball bearing 45 fixedly connected to the outside of the movable rod 43, and a hidden groove 46 opened in the inner wall of the locking groove 41. The guide mechanism 5 includes an L-shaped plate 51, a connecting rod 52 fixedly connected to the bottom of the L-shaped plate 51, a guide ring 53 fixedly connected to the bottom of the connecting rod 52, a second compression spring 54 fixedly connected to the inner side of the guide ring 53, and a rubber ring 55 fixedly connected to the outer side of the second compression spring 54. Furthermore: the snap-fit ​​grooves 41 are evenly distributed on the outer side of the rotating plate 1, the movable tubes 42 are symmetrically distributed on both sides of the snap-fit ​​grooves 41, the die body 3 is installed inside the snap-fit ​​grooves 41, the moving rod 43 passes through the inner wall of the snap-fit ​​grooves 41, the ball bearings 45 are movable and symmetrically distributed inside the snap-fit ​​grooves 41, and the initial position of the ball bearings 45 is inside the hidden groove 46. The ball bearings 45 are adapted to the rotating groove 31, the L-shaped plate 51 is fixedly connected to the top of the snap-fit ​​grooves 41, and the die body 3 passes through the inside of the guide ring 53.

[0018] It should be noted that the design of the evenly distributed locking grooves 41 on the outer side of the rotating plate 1, as the core load-bearing component of the entire chuck, is not only for installing the die-cutting molds, but also implicitly considers the adaptation to "multi-station synchronous operation". Combined with the common hot air cover punching requirements in the industry, the evenly distributed locking grooves 41 can flexibly increase or decrease the number of die-cutting mold bodies 3 according to the production efficiency requirements. For example, in the mass production scenario, multiple sets of die-cutting molds can be installed along the circumference or straight line of the rotating plate 1. With the periodic movement of the rotating plate 1, "one-time conveying and multiple sets of punching" can be achieved, which can greatly improve the output per unit time. At the same time, the rotating plate 1 needs to have sufficient structural strength to withstand the impact force of the die-cutting molds. Judging from the material selection perspective, its material is likely to be a high-strength alloy, which ensures rigidity while controlling the overall weight and avoids increasing the load on the drive device due to the excessive weight of the rotating plate 1.

[0019] Specifically: The fit between the ball bearing 45 and the rotating groove 31 is the core of the snap-fit ​​fixation. The ball bearing 45 is made of high-hardness wear-resistant material and undergoes surface quenching treatment to extend its service life. Small anti-slip textures are added at the connection between the moving rod 43 and the movable tube 42. Washers are added to both ends of the compression spring 44 to prevent the spring from shifting due to long-term vibration, ensuring that the ball bearing 45 can always be stably snapped into the rotating groove 31, preventing the die from accidentally loosening during punching. In addition, the fit ratio between the depth of the hidden groove 46 and the diameter of the ball bearing 45 needs to be precisely controlled. The depth of the hidden groove 46 is slightly less than the radius of the ball bearing 45, which ensures that the ball bearing 45 can completely retract into the hidden groove 46 when the die is inserted, and also prevents the ball bearing 45 from not popping out in time when snapping due to the hidden groove 46 being too deep.

[0020] As a further implementation of this solution, the feeding mechanism 2 includes a support frame 21, a feeding roller 22 is rotatably connected inside the support frame 21, a positioning wheel 23 is provided on the outside of the support frame 21, and a feeding trough 24 is fixedly connected to the bottom of the support frame 21.

[0021] It should be noted that the support frame 21 is fixedly connected to the top of the rotating plate 1, and the feeding chute 24 is located above the rotating plate 1.

[0022] Furthermore, the rubber ring 55 inside the guide ring 53 can not only achieve flexible clamping through the second compression spring 54, but also has the dual function of "protecting the die and the substrate". The softness of the rubber ring 55 can prevent the die from rigidly colliding with the guide ring 53 when it is inserted, reducing accidental damage to the die cutting edge. At the same time, if slight wrinkles appear on the edge of the substrate during the substrate conveying process, the rubber ring 55 can also smooth them out to a certain extent through its own deformation, reducing the impact of substrate defects on the punching quality.

[0023] Work process: First, install and fix the die. The operator holds the die body 3 and inserts it into the guide ring 53 fixed to the L-shaped plate 51 by the connecting rod 52 in the guide mechanism 5. The guide ring 53 guides the die to be inserted along the preset trajectory. After the inner rubber ring 55 is squeezed, the second compression spring 54 generates a reverse flexible clamping force to initially limit the radial sway of the die. The die is continuously inserted into the snap-fit ​​groove 41 until the end is in contact with the bottom of the groove. Rotate the die clockwise. When the outer rotating groove 31 of the die is aligned with the hidden groove 46 on the inner wall of the snap-fit ​​groove 41, the first compression spring 44 in the movable tube 42 pushes the moving rod 43 to drive the ball 45 to pop out from the hidden groove 46 and snap into the rotating groove 31. The symmetrically distributed ball 45 forms a uniform radial clamping force on the die to complete the fixation. When replacing, rotate the die in the opposite direction to make the ball 45 return to the hidden groove 46 and then pull it out. After the die-cutting mold is installed, the continuous punching operation begins. The offset food packaging substrate enters from one side of the feeding roller 22 of the feeding mechanism 2. The feeding roller 22 is rotatably connected to the top of the rotating plate 1 via the support frame 21. After starting, the substrate is conveyed at a preset speed. The positioning wheel 23 on the outer side of the support frame 21 fits against the edge of the substrate to limit lateral displacement. The rotating plate 1 performs periodic reciprocating motion under the drive of the drive device, synchronously driving the die-cutting mold body 3 fixed by the rotating locking mechanism 4. When the die-cutting mold moves towards the substrate, the cutting edge contacts and completes the punching. After punching, the rotating plate 1 drives the die-cutting mold to reset and wait for the next cycle. The finished hot air cap, after punching, is conveyed to the support frame 2 along with the substrate. 1. The bottom feeding trough 24 is used to collect materials that fall into the trough 24 under the force of gravity or the subsequent push of the substrate. The substrate waste is then discharged from the other end of the feeding mechanism 2, completing the separation of "substrate-punching-finished product-waste". Throughout the process, the guiding mechanism 5 provides initial positioning for the die installation, the rotating locking mechanism ensures the die is stably fixed, the feeding mechanism 2 achieves precise material delivery, the rotating plate 1 drives the die to complete the punching, and the feeding trough 24 achieves automatic collection of finished products. Through size adaptation and position coordination, the various components ensure the overall stable operation of the equipment, enabling both rapid die replacement and ensuring the efficiency and accuracy of hot air cover punching, thus meeting the needs of mass production.

[0024] 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 quick-change die-cutting chuck for hot air cap die-cutting of offset printed food packaging, comprising a rotating plate (1), characterized in that: The top of the operating plate (1) is provided with a feeding mechanism (2), the outer side of the operating plate (1) is provided with a die body (3), a rotating groove (31) is provided on the outer side of one end of the die body (3), a rotating snap-fit ​​mechanism (4) is provided on the outer side of the die body (3), and a guide mechanism (5) is provided on the top of the rotating snap-fit ​​mechanism (4). The rotating snap-fit ​​mechanism (4) includes a snap-fit ​​groove (41), a movable tube (42) is fixedly connected to the outside of the snap-fit ​​groove (41), a movable rod (43) is movably snapped inside the movable tube (42), a compression spring (44) is sleeved on the movable rod (43), a ball bearing (45) is fixedly connected to the outside of the movable rod (43), and a hidden groove (46) is opened in the inner wall of the snap-fit ​​groove (41). The guide mechanism (5) includes an L-shaped plate (51), a connecting rod (52) is fixedly connected to the bottom of the L-shaped plate (51), a guide ring (53) is fixedly connected to the bottom of the connecting rod (52), a second compression spring (54) is fixedly connected to the inner side of the guide ring (53), and a rubber ring (55) is fixedly connected to the outer side of the second compression spring (54).

2. The quick-change die clamp for hot air cap die cutting of offset printed food packaging according to claim 1, characterized in that: The feeding mechanism (2) includes a support frame (21), a feeding roller (22) is rotatably connected inside the support frame (21), a positioning wheel (23) is provided on the outside of the support frame (21), and a feeding trough (24) is fixedly connected to the bottom of the support frame (21).

3. The quick-change die clamp for hot air cap die cutting of offset printed food packaging according to claim 1, characterized in that: The snap-fit ​​grooves (41) are evenly distributed on the outside of the operating plate (1), and the movable tubes (42) are symmetrically distributed on both sides of the snap-fit ​​grooves (41).

4. The quick-change die clamp for hot air cap die cutting of offset printed food packaging according to claim 1, characterized in that: The die body (3) is installed inside the snap-fit ​​groove (41), and the moving rod (43) passes through the inner wall of the snap-fit ​​groove (41).

5. The quick-change die clamp for hot air cap die cutting of offset printed food packaging according to claim 1, characterized in that: The balls (45) are movable and symmetrically distributed inside the snap-fit ​​groove (41), and the initial position of the balls (45) is inside the hidden groove (46).

6. The quick-change die clamp for hot air cap die cutting of offset printed food packaging according to claim 1, characterized in that: The ball (45) is adapted to the rotating groove (31), the L-shaped plate (51) is fixedly connected to the top of the snap-fit ​​groove (41), and the die body (3) passes through the interior of the guide ring (53).

7. The quick-change die clamp for hot air cap die cutting of offset printed food packaging according to claim 2, characterized in that: The support frame (21) is fixedly connected to the top of the operating plate (1), and the feeding trough (24) is located above the operating plate (1).

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