Processing die for preventing waist buckle of connected box from being popped open

Abstract

The utility model relates to meal box processing technical field, and disclose a kind of processing mould of preventing the waist buckle of conjoined box from opening, including shell handle, shell handle is also fixedly connected with wire, shell handle is fixedly installed with spiral heating jacket, spiral heating jacket is coaxially inserted into the waist buckle of conjoined box, waist buckle includes inner buckle and outer buckle, inner buckle and outer buckle are mutually buckled;The spiral engagement structure formed by the die of the application not only greatly improves the contact area of inner buckle and outer buckle, so that external force can be more evenly dispersed, but also greatly enhances the anti-stripping force of waist buckle by the axial locking characteristics of spiral structure, effectively solves the problem of insufficient traditional waist buckle buckling force, easily opened by external force, leading to food spillage, while avoiding the damage of packing box structure, use scratch and risk of accidental ingestion caused by other reinforcement structure, greatly improve the connection reliability and use safety of conjoined box waist buckle.

Description

Technical Field

[0001] This utility model relates to the field of lunch box processing technology, specifically a processing mold to prevent the waist buckle of a one-piece lunch box from popping open. Background Technology

[0002] Packaging boxes are single-use containers designed to meet the needs of portable food storage and transportation. They are currently mainly used in food delivery, fast food sales, and packaging leftover food from family gatherings. Polypropylene (PP) material has good high-temperature resistance, withstanding temperatures of 100-130℃, making it suitable for direct microwave heating. It also boasts excellent flexibility, with an elongation at break of up to 300%, impact resistance, and strong chemical stability. It is BPA-free, safe, and environmentally friendly, and possesses good low-temperature resistance, usable in environments from -35℃ to -18℃. Therefore, PP material is particularly suitable for hot food packaging and long-term storage, making it the preferred material for disposable packaging boxes. Existing PP packaging boxes are mainly divided into two types: separate packaging boxes and one-piece flip-top packaging boxes. One-piece flip-top packaging boxes are manufactured through die-cutting or one-piece molding processes, connecting the box body and lid with connecting straps, crease lines, and other structural elements. The box body and lid are typically sealed with four-sided buckles, while easily detachable stress points are secured with waist buckles.

[0003] However, the existing one-piece flip-top packing boxes have insufficient fastening force due to the sealing buckle and waist buckle. This results in low precision in the interlocking fit between the box body and the lid, and the box is not resistant to detachment. Especially when the packing box is subjected to external forces such as road bumps and shaking during long-distance transport, the waist buckle is prone to coming loose or failing, causing food and soup to spill inside the box. To avoid the above-mentioned spillage problem, some users will use additional reinforcement structures to reinforce the connection between the box body and the lid. Although this method can prevent the waist buckle from coming loose to a certain extent, the additional reinforcement structure will damage the packing box, making it unusable after the first opening. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a processing mold for preventing the snap fasteners of integrated boxes from popping open. It has the advantage of making the snap fasteners of integrated boxes more secure and solves the problem of insufficient fastening force and easy failure of traditional snap fasteners.

[0005] (II) Technical Solution To achieve the aforementioned goal of making the waist buckle connection of the integrated box more secure, this utility model provides the following technical solution: a processing mold for preventing the waist buckle of the integrated box from popping open, including a shell handle, on which a wire is fixedly connected, and a spiral heating sleeve is fixedly installed. The spiral heating sleeve is coaxially inserted into the waist buckle of the integrated box. The waist buckle includes an inner buckle and an outer buckle, which are interlocked. When the spiral heating sleeve is inserted into the interlocked inner and outer buckles, it heats the inner and outer buckles to form a spiral limiting pattern on their surfaces.

[0006] Preferably, the integrated box includes a lid and a body, the inner buckle is integrally processed on the lid, the outer buckle is integrally processed on the body, and there are two or more sets of the inner buckle processed on the lid and two or more sets of the outer buckle processed on the body.

[0007] Preferably, a connecting post is coaxially fixedly connected between the spiral heating sleeve and the outer casing handle. The spiral heating sleeve includes a fixed sleeve and a heating core. The heating core is installed inside the fixed sleeve, and the fixed sleeve and the heating core are coaxially rotatably connected. A spiral groove is machined on the surface of the fixed sleeve. A heating head that slides along the spiral groove is fixedly connected to the heating core. The heating head slides in cooperation with the spiral groove. When the heating core slides axially relative to the fixed sleeve, the heating head slides along the spiral groove, causing the heating core to rotate circumferentially and heat the waist buckle.

[0008] Preferably, the connecting post and the fixed sleeve are axially slidably connected, and a limiting protrusion is fixedly provided on the connecting post to restrict the circumferential rotation of the fixed sleeve. The bottom of the connecting post and the heating core are rotatably connected by a spring, and the spring is stretched when the heating core slides down along the axial direction of the fixed sleeve.

[0009] Preferably, the heating core is connected to a wire.

[0010] Preferably, the limiting protrusions are arranged in two or more sets at equal intervals along the circumference of the connecting column.

[0011] Preferably, a buffer pad is also fixedly installed at the bottom of the heating core.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a processing mold to prevent the waist buckle of the integrated box from popping open, which has the following beneficial effects: 1. This processing mold for preventing the snap fastener of a one-piece box from popping open utilizes a combination of a fixed sleeve structure and a heating core structure. Compared to traditional snap fasteners that rely solely on point-to-point engagement between protrusions and grooves, the spiral engagement structure formed by the mold in this application not only significantly increases the contact area between the inner and outer snap fasteners, allowing external forces to be distributed more evenly, but also significantly enhances the snap fastener's resistance to detachment by leveraging the axial locking characteristics of the spiral structure. This effectively solves the problems of insufficient fastening force and easy popping open under external force, leading to food spillage. At the same time, it avoids damage to the packaging box structure caused by users using other reinforcement structures, greatly improving the connection reliability and safety of the one-piece box snap fastener.

[0013] 2. This processing mold for preventing the snap fastener of a one-piece box from popping open utilizes a combination of a spiral groove structure and a spring structure. During the reset process, the reset force of the stretched spring drives the heating core to reset axially upward. Simultaneously, the sliding fit between the heating head and the spiral groove of the fixed sleeve allows the heating head to continue sliding along the spiral trajectory and maintain secondary heating of the inner buckle with the initially formed pattern. This effectively compensates for defects in the initial processing, thereby greatly enhancing the structural stability of the spiral limiting pattern and avoiding a decrease in the fastening force of the snap fastener during later use due to pattern defects. Attached Figure Description

[0014] Figure 1 This is a front view of the processing mold for preventing the waist buckle of the integrated box from popping open in this utility model; Figure 2 This is a three-dimensional structural diagram of the processing mold for preventing the waist buckle of the integrated box from popping open in this utility model. Figure 3 This is a schematic diagram of the integrated box structure of the processing mold for preventing the waist buckle of the integrated box from popping open in this utility model. Figure 4 This is a three-dimensional structural diagram of the processing mold for preventing the waist buckle of the integrated box from popping open in this utility model. Figure 5 This is a cross-sectional view of the spiral limiting texture structure of the processing mold for preventing the waist buckle of the integrated box from popping open in this utility model.

[0015] In the diagram: 1. Integrated box; 11. Box lid; 12. Box body; 2. Inner buckle; 3. Outer buckle; 4. Outer shell handle; 41. Wire; 5. Connecting post; 51. Limiting protrusion; 6. Spiral heating sleeve; 61. Fixing sleeve; 611. Spiral groove; 62. Heating core; 621. Heating head; 622. Spring; 623. Buffer pad; 7. Spiral limiting texture. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-5 A processing mold for preventing the buckle of the integrated box 1 from popping open includes an outer shell handle 4, on which a wire 41 is fixedly connected. The outer shell handle 4 is designed as an ergonomic arc-shaped columnar structure, with anti-slip texture on the outer wall of the grip area. The material is high-temperature resistant and insulating ABS engineering plastic, which prevents operators from being burned by heat conducted by the heating components during equipment operation, and also prevents current leakage and safety accidents through its insulation properties. The connection between the wire 41 and the outer shell handle 4 adopts an insert injection molding integrated assembly method. One end of the wire 41 is pre-embedded in the conductive cavity inside the outer shell handle 4. The cavity is provided with a copper conductive terminal. The conductor part of the wire 41 is fixed to the conductive terminal by soldering. The outside is then tightly wrapped with the wire 41 and the outer shell handle 4 through an injection molding process, with only the other end of the wire 41 protruding from the outer shell handle 4 for connecting to the power supply. A spiral heating sleeve 6 is fixedly installed on the outer handle 4. The spiral heating sleeve 6 is coaxially inserted into the waist buckle of the integrated box 1. The spiral heating sleeve 6 is a hollow cylinder, and its inner diameter is adapted to the outer diameter of the inner buckle 2 in the waist buckle of the integrated box 1 to avoid scratching the inner wall of the inner buckle 2 or causing the inner buckle 2 to deform when inserted. The waist buckle includes an inner buckle 2 and an outer buckle 3, which are interlocked. When the spiral heating sleeve 6 is inserted into the interlocked inner buckle 2 and outer buckle 3, it heats the inner buckle 2 and outer buckle 3 to form spiral limiting patterns 7 on their surfaces.

[0018] Please see Figures 1-5The integrated box 1 includes a lid 11 and a body 12. An inner buckle 2 is integrally machined onto the lid 11, and an outer buckle 3 is integrally machined onto the body 12. Two or more sets of inner buckles 2 and two or more sets of outer buckles 3 are machined onto the lid 11 and the body 12, respectively. A connecting post 5 is coaxially fixed between the spiral heating sleeve 6 and the outer handle 4. The spiral heating sleeve 6 includes a fixing sleeve 61 and a heating core 62. The connecting post 5 is designed as a solid cylindrical structure, and its upper end is fixed to the bottom center of the outer handle 4 via a threaded connection. The fixing sleeve 61 is a hollow cylinder, and the heating core 62 is cylindrical in shape. The outer wall of the heating core 62 and the inner wall of the fixing sleeve 61 are fitted with a clearance fit, which ensures smooth axial sliding and circumferential rotation of the heating core 62 within the fixing sleeve 61 while preventing axial misalignment due to excessive clearance. The heating core 62 is installed inside the fixed sleeve 61, and the fixed sleeve 61 and the heating core 62 are coaxially rotatably connected. The surface of the fixed sleeve 61 is machined with a spiral groove 611. A heating head 621 that slides along the spiral groove 611 is fixedly connected to the heating core 62. The heating head 621 is in sliding fit with the spiral groove 611. When the heating core 62 slides axially relative to the fixed sleeve 61, the heating head 621 slides along the spiral groove 611, causing the heating core 62 to rotate circumferentially and heat the waist buckle. The spiral groove 611 on the surface of the fixed sleeve 61 is evenly distributed along its axial direction, and the groove opening has an arc-shaped structure. The groove depth is adapted to the extension length of the heating head 621. The heating head 621 is made of high-temperature resistant copper alloy and is fixed to the outer wall of the heating core 62 near the lower end by laser welding. The end of the heating head 621 extends out of the outer wall of the heating core 62 and fits into the spiral groove 611 of the fixed sleeve 61. The contact area between the heating head 621 and the spiral groove 611 is provided with a wear-resistant coating to prevent wear caused by long-term sliding.

[0019] Please see Figures 1-5The connecting post 5 and the fixing sleeve 61 are axially slidably connected. A limiting protrusion 51, which restricts the circumferential rotation of the fixing sleeve 61, is fixedly installed on the connecting post 5. The limiting protrusion 51 is integrally formed on the outer wall of the connecting post 5, is elongated, and extends axially along the connecting post 5. An elongated limiting groove, adapted to the limiting protrusion 51, is formed on the upper inner wall of the fixing sleeve 61. The limiting protrusion 51 is embedded in the limiting groove with a clearance fit. The bottom of the connecting post 5 is rotatably connected to the heating core 62 via a spring 622. When the heating core 62 slides axially along the fixing sleeve 61, the spring 622 is stretched. The bottom end face of the connecting post 5 is provided with a cylindrical connecting lug, and the top end face of the heating core 62 is provided with a corresponding connecting seat with a circular hole. The inner diameter of the circular hole of the connecting seat is slightly larger than the outer diameter of the connecting lug. One end of the spring 622 is sleeved on the connecting lug and abuts against the bottom end face of the connecting post 5, and the other end is sleeved in the circular hole of the connecting seat and abuts against the top end face of the heating core 62. This allows the spring 622 to achieve both axial connection between the connecting post 5 and the heating core 62 and to allow the heating core 62 to rotate circumferentially around the connecting lug. The heating core 62 is connected to the wire 41. Two or more sets of limiting protrusions 51 are equidistantly arranged along the circumference of the connecting post 5. A buffer pad 623 is also fixedly installed at the bottom of the heating core 62. The buffer pad 623 is made of a high-temperature resistant elastic material, such as silicone rubber. Its thickness must be sufficient to provide a buffering effect without affecting the positioning and fit between the heating core 62 and the inner buckle 2. The buffer pad 623 is fixed to the bottom end face of the heating core 62 by a high-temperature resistant adhesive.

[0020] Please see Figures 1-5When using the processing mold to prevent the buckle of the integrated box 1 from popping open, first connect the wire 41 on the outer shell handle 4 to the power supply, so that the heating core 62 and the heating head 621 on the heating core 62 are energized and heated. After the surface temperature of the heating head 621 reaches the preset requirement, fasten the box cover 11 and the box body 12 of the integrated box 1 together, ensuring that the inner buckle 2 on the box cover 11 and the outer buckle 3 on the box body 12 are engaged. Then, insert the spiral heating sleeve 6 coaxially into the engaged inner buckle 2, so that the bottom end face of the fixing sleeve 61 in the spiral heating sleeve 6 abuts against the bottom end face of the inner buckle 2. Next, apply circumferential downward pressure to the outer shell handle, causing the heating core 62 to slide downward along the axial direction of the fixing sleeve 61. During the axial sliding of the heating core 62, The heating head 621, fixed to its surface, slides along the spiral groove 611 on the surface of the fixed sleeve 61. During the sliding process, it drives the heating core 62 to rotate synchronously, and stretches the spring 622 between the bottom of the connecting post 5 and the heating core 62. When the heating head 621 slides along the spiral groove 611, it contacts the inner wall surface of the inner buckle 2. Through heat transfer, the inner buckle 2 is heated and softened, and a spiral limiting pattern 7 is formed on its surface. At the same time, the heat transferred by the inner buckle 2 will heat the outer buckle 3 that is fastened to it, and a matching spiral limiting pattern 7 will also be formed at the corresponding position on the inner wall of the outer buckle 3. The spiral limiting patterns 7 on the inner buckle 2 and the outer buckle 3 interlock, thereby greatly improving the fastening force between the inner buckle 2 and the outer buckle 3. When the heating core 621 is heated... When the bottom surface of 2 abuts against the inner bottom surface of the fixing sleeve 61, the initial processing of the spiral limiting pattern 7 is completed. Then, the pressure on the housing handle is released, and the stretched spring 622 generates a restoring force, which drives the heating core 62 to return to the axial direction of the fixing sleeve 61. During the return process, the heating head 621 continues to slide along the spiral groove 611, and heats the inner buckle 2, which has formed the spiral limiting pattern 7, again to further enhance the structural stability of the spiral limiting pattern 7. After the heating core 62 is completely returned to the axial direction, the spiral heating sleeve 6 is pulled out from the inner buckle 2 by holding the housing handle 4, and the processing operation of the spiral limiting pattern 7 at the waist buckle of the integrated box 1 is completed. When the inner buckle 2 and the outer buckle 3 are cooled and shaped, the spiral limiting patterns 7 of the two form an interlocking structure. Compared to the point-to-point interlocking of the protrusions and grooves in traditional waist buckles, the interlocking method of the spiral pattern allows for continuous contact along the circumferential surface, significantly increasing the contact area and more evenly distributing the external force generated by shaking. At the same time, the spiral structure itself has axial locking characteristics. After the spiral patterns of the inner buckle 2 and the outer buckle 3 are interlocked, to separate them, it is necessary to overcome the friction between the spiral surfaces and break the interlocking state of the spiral patterns. In contrast, traditional waist buckles only need to overcome the interlocking force of a single protrusion and groove to separate. Therefore, the interlocking of the spiral limiting pattern 7 works together from three aspects: contact area, force distribution, and structural locking, greatly improving the fastening force between the inner buckle 2 and the outer buckle 3, effectively preventing the waist buckle from popping open under external force.

[0021] Please see Figures 1-5During the resetting process, the stretched spring 622 releases its elastic force, causing the heating core 62 to reset axially upward along the fixed sleeve 61. Since the heating head 621 maintains a sliding fit with the spiral groove 611 of the fixed sleeve 61, the heating head 621 continues to slide along the spiral groove 611 trajectory as the heating core 62 resets. At this time, the heating head 621 is still in an electrically heated state and will continuously transfer heat to the inner buckle 2 of the initially formed spiral limiting pattern 7. The spiral limiting pattern 7 of the inner buckle 2 formed in the initial processing may have irregular molecular arrangement due to uneven heating of local materials, or slight internal stress caused by initial cooling. The reheating of the heating head 621 during resetting can make the inner buckle 2 pattern... The material is returned to a moderately softened state, allowing the material molecules sufficient space to rearrange more evenly, thereby eliminating local internal stress and preventing cracking or deformation of the texture during subsequent cooling or stress. At the same time, as the heating head 621 slides along the spiral groove 611, it will perform secondary extrusion and trimming on the texture surface and edges, filling any tiny gaps or irregularities that may exist in the initial molding, making the structure of the spiral limiting texture 7 more standard. Furthermore, the continuous heat transfer allows the spiral textures of the inner buckle 2 and the outer buckle 3 to complete further bonding and shaping in a more stable temperature environment, reducing the problem of uneven texture shrinkage caused by sudden temperature drops, and greatly enhancing the structural stability of the spiral limiting texture 7.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] 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 processing mold for preventing the snap fastener of a one-piece box from popping open, comprising a housing handle (4), wherein a wire (41) is fixedly connected to the housing handle (4), characterized in that: A spiral heating sleeve (6) is fixedly installed on the outer shell handle (4). The spiral heating sleeve (6) is coaxially inserted into the waist buckle of the integrated box (1). The waist buckle includes an inner buckle (2) and an outer buckle (3). The inner buckle (2) and the outer buckle (3) are fastened to each other. When the spiral heating sleeve (6) is inserted into the fastened inner buckle (2) and the outer buckle (3), the inner buckle (2) and the outer buckle (3) are heated to form a spiral limiting pattern (7) on their surface.

2. The processing mold for preventing the snap fastener of a one-piece box from popping open according to claim 1, characterized in that: The integrated box (1) includes a lid (11) and a body (12). The inner buckle (2) is integrally processed on the lid (11), and the outer buckle (3) is integrally processed on the body (12). The inner buckle (2) is processed on the lid (11) in two or more sets, and the outer buckle (3) is processed on the body (12) in two or more sets.

3. The processing mold for preventing the snap fastener of a one-piece box from popping open according to claim 1, characterized in that: A connecting post (5) is coaxially fixed between the spiral heating sleeve (6) and the outer shell handle (4). The spiral heating sleeve (6) includes a fixed sleeve (61) and a heating core (62). The heating core (62) is installed inside the fixed sleeve (61), and the fixed sleeve (61) and the heating core (62) are coaxially rotatably connected. The surface of the fixed sleeve (61) is machined with a spiral groove (611). A heating head (621) is fixedly connected to the heating core (62) and slides along the spiral groove (611). The heating head (621) slides with the spiral groove (611). When the heating core (62) slides axially relative to the fixed sleeve (61), the heating head (621) slides along the spiral groove (611) to drive the heating core (62) to rotate circumferentially and heat the waist buckle.

4. The processing mold for preventing the snap fastener of a one-piece box from popping open according to claim 3, characterized in that: The connecting post (5) is axially slidably connected to the fixed sleeve (61), and a limiting protrusion (51) is fixedly provided on the connecting post (5) to restrict the circumferential rotation of the fixed sleeve (61). The bottom of the connecting post (5) is rotatably connected to the heating core (62) by a spring (622). When the heating core (62) slides down along the fixed sleeve (61) axially, the spring (622) is stretched.

5. The processing mold for preventing the snap fastener of a one-piece box from popping open according to claim 3, characterized in that: The heating element (62) is connected to the wire (41).

6. The processing mold for preventing the snap fastener of a one-piece box from popping open according to claim 4, characterized in that: The limiting protrusions (51) are arranged in two or more sets at equal intervals along the circumference of the connecting column (5).

7. The processing mold for preventing the snap fastener of a one-piece box from popping open according to claim 3, characterized in that: A buffer pad (623) is also fixedly installed at the bottom of the heating core (62).

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