A packaging container which can be filled at high temperature and has a large capacity

Abstract

The utility model discloses a kind of high-temperature filling and large-capacity packaging container, including container body, the container body is sequentially connected by container bottom, container lower part, container middle part and container upper part, and the stress connection ring of inward recess is equipped between the container lower part and container middle part and between the container middle part and container upper part;By adding stress connection ring connection between container lower part, container middle part and container upper part adjacent, and the corresponding stress structure is respectively equipped on container bottom, container lower part, container middle part and container upper part, the utility model can not be easily deformed, effectively improve its structural stability reliability.

Description

[Technical Field]

[0001] This utility model relates to packaging containers, and more particularly to a high-temperature filling and large-capacity packaging container. [Background Technology]

[0002] With the continued growth in demand for large-capacity packaging containers from industries such as food, beverage, and chemicals, especially in hot-fill scenarios, packaging containers must simultaneously meet the dual requirements of large capacity and high-temperature resistance for filling. These containers are typically used to store or transport liquids and semi-fluid materials, and their structural stability and resistance to deformation directly affect the quality of the contents, transportation safety, and storage efficiency.

[0003] Currently, most large-capacity packaging containers on the market are made of plastic materials, such as PET and PP, which have advantages such as lightweight, low cost, and easy visibility. However, for high-temperature filling scenarios, where the filling temperature is typically 70-95℃, traditional packaging containers expose the following key problems:

[0004] 1. Plastic materials are prone to thermal expansion at high temperatures. When the internal medium cools down, it contracts and generates negative pressure, causing deformation such as dents and collapses in local areas of the container, such as the bottom and side walls, due to the pressure difference between the inside and outside, which seriously affects the stacking stability.

[0005] 2. Due to the large height-to-diameter ratio, large-capacity containers have insufficient overall structural coordination. The lower, middle and upper parts are mostly independently molded or simply connected, lacking an effective stress transmission structure. When subjected to internal pressure, stacking compression or transportation vibration, the sections are prone to relative displacement or local stress concentration, leading to overall deformation or even rupture.

[0006] 3. The stress structure of traditional containers is mostly concentrated at the bottom. For example, adding reinforcing ribs can help, but the lower, middle and upper parts lack targeted reinforcement designs and cannot form a global anti-deformation system. After long-term use or multiple filling cycles, cumulative deformation is likely to occur.

[0007] In addition, some existing technologies attempt to improve strength by increasing wall thickness or adopting multi-layer composite structures. However, increasing wall thickness leads to higher material costs and increased container weight. Furthermore, the difference in cooling rates between thick-walled and thin-walled regions can easily cause internal stress, which in turn exacerbates the risk of deformation. Multi-layer composite structures, on the other hand, have problems such as complex processes and high recycling difficulty, making it difficult to meet the development trend of green packaging.

[0008] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0009] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a packaging container that can be filled at high temperatures and has a large capacity. By adding force-bearing connecting rings between adjacent parts of the lower, middle and upper parts of the container, and by providing corresponding force-bearing structures on the bottom, lower, middle and upper parts of the container, this utility model is less prone to deformation and its structural stability and reliability are effectively improved.

[0010] To solve the above-mentioned technical problems, this utility model provides a packaging container that can be filled at high temperatures and has a large capacity, including a container body 1, which is composed of a container bottom 11, a container lower part 12, a container middle part 13 and a container upper part 14 connected in sequence.

[0011] A stress-bearing connecting ring 15 is provided between the lower part 12 and the middle part 13 of the container and between the middle part 13 and the upper part 14 of the container. The stress-bearing connecting ring 15 is an inwardly concave ring structure, which is used to balance the circumferential stress of the upper and lower parts of the container body 1 during high-temperature filling and to prevent stress from being concentrated and transmitted to other areas of the container body 1.

[0012] The container bottom 11 is provided with a bottom force-bearing structure 2, which is a composite structure that is concave inward and convex outward, and is used to bear the static pressure of the contents.

[0013] The lower part 12 of the container is provided with a lower force-bearing structure 3 for bearing the supporting reaction force transmitted from the bottom 11 of the container and for bearing the stretching of the middle part 13 of the container and being recessed inward.

[0014] The container has a central force-bearing structure 4 in the middle 13 for bearing internal pressure and circumferential stress transmitted by the upper and lower force-bearing connecting rings 15, and is concave inward and / or convex outward.

[0015] The upper part 14 of the container is provided with an upper force-bearing structure 5 that is recessed inward to withstand the internal negative pressure during the cooling stage;

[0016] Through the stress gradient transfer and coordinated dispersion design of the stress-bearing connecting ring 15, bottom stress-bearing structure 2, lower stress-bearing structure 3, middle stress-bearing structure 4 and upper stress-bearing structure 5, the overall deformation of the container body 1 during high-temperature filling and subsequent cooling process is controlled within 0.5%, thus achieving shape and structural stability.

[0017] As described above, a high-temperature filling and large-capacity packaging container includes a bottom force-bearing structure 2, which is provided on the bottom 11 of the container and is recessed inward. The bottom wall of the bottom force-bearing groove 21 is provided with an outwardly protruding bottom force-bearing protrusion 22. The front and rear ends of the bottom force-bearing protrusion 22 are respectively connected to the corresponding side walls of the bottom force-bearing groove 21.

[0018] As described above, a high-temperature filling and large-capacity packaging container, the bottom force-bearing structure 2 further includes a bottom force-bearing rib 23 that is disposed on the bottom wall of the bottom force-bearing groove 21 and protrudes outward between the bottom force-bearing protrusion 22 and the corresponding side wall of the bottom force-bearing groove 21. One end of the bottom force-bearing rib 23 is connected to the corresponding side of the bottom force-bearing protrusion 22, and the other end of the bottom force-bearing rib 23 is connected to the corresponding side wall of the bottom force-bearing groove 21.

[0019] As described above, a high-temperature filling and large-capacity packaging container has an inwardly recessed protruding force-bearing cavity 221 at the bottom of the bottom force-bearing protrusion 22, and multiple protruding force-bearing grooves 222 are distributed at intervals around the periphery of the protruding force-bearing cavity 221.

[0020] As described above, a high-temperature filling and large-capacity packaging container includes a plurality of lower force-bearing grooves 31 that are spaced apart circumferentially on the lower part 12 of the container and recessed downwards, with the lower side of the lower force-bearing grooves 31 extending to the bottom 11 of the container.

[0021] As described above, a high-temperature filling and large-capacity packaging container includes a central force-bearing structure 4 comprising central force-bearing grooves 41 spaced circumferentially on the central part 13 of the container and recessed inward. The vertical length of the central force-bearing grooves 41 is greater than its horizontal width. Each central force-bearing groove 41 has an outwardly protruding central force-bearing protrusion 42 on its inner bottom wall. The central force-bearing protrusion 42 has multiple central force-bearing grooves 43 spaced vertically and recessed inward. The vertical length of the central force-bearing grooves 43 is less than its horizontal width.

[0022] As described above, a high-temperature filling and large-capacity packaging container includes a central force-bearing structure 4, which is located on the central part 13 of the container and recessed inward between two adjacent central force-bearing grooves 41. The vertical length of the central force-bearing groove 44 is greater than the vertical length of the central force-bearing groove 41, and the horizontal width of the central force-bearing groove 44 is less than the horizontal width of the central force-bearing groove 41.

[0023] As described above, a high-temperature filling and large-capacity packaging container includes an upper force-bearing structure 5 comprising upper force-bearing grooves 51 spaced circumferentially on the upper part 14 of the container and recessed inward. Each side wall of the upper force-bearing groove 51 is inclined from the outside to the center of the upper force-bearing groove 51.

[0024] As described above, a high-temperature filling and large-capacity packaging container includes an upper force-bearing structure 5 comprising two upper force-bearing grooves 52 spaced circumferentially on the upper part 14 of the container and recessed inward. The upper force-bearing grooves 52 are located above the upper force-bearing grooves 51. The vertical length of the upper force-bearing grooves 52 is greater than its horizontal width, and the upper and lower sidewalls of the upper force-bearing grooves 52 are connected to their inner bottom wall to form an arc-shaped surface.

[0025] As described above, a high-temperature filling and large-capacity packaging container is provided with annular reinforcing ribs on the inner wall of the force-bearing connecting ring 15.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. This utility model adds a force-bearing connecting ring between adjacent parts of the lower, middle and upper parts of the container, and provides corresponding force-bearing structures on the bottom, lower, middle and upper parts of the container, which makes the utility model less prone to deformation and effectively improves its structural stability and reliability.

[0028] 2. The bottom of the container is reinforced by an inwardly recessed bottom stress groove and an outwardly convex bottom stress protrusion, which improves the overall structural strength of the container bottom.

[0029] 3. The lower part of the container has an inwardly recessed stress groove that extends to the bottom of the container. This not only disperses the pressure of the contents but also improves the structural strength between the lower part of the container and the bottom of the container. [Attached Image Description]

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a perspective view of the present invention.

[0032] Figure 2 This is the front view of the present invention.

[0033] Figure 3 This is a side view of the present invention.

[0034] Figure 4 This is one of the bottom views of this utility model.

[0035] Figure 5 This is the second bottom view of this utility model.

Detailed Implementation Methods

[0036] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0037] like Figure 1-5 As shown, this utility model discloses a high-temperature filling and large-capacity packaging container, including a container body 1. The container body 1 is composed of a container bottom 11, a container lower part 12, a container middle part 13, and a container upper part 14 connected in sequence. A stress-bearing connecting ring 15 is provided between the container lower part 12 and the container middle part 13, and between the container middle part 13 and the container upper part 14. The stress-bearing connecting ring 15 is an inwardly concave annular structure used to balance the circumferential stress between the upper and lower parts of the container body 1 during high-temperature filling, preventing stress from being concentrated and transmitted to other areas of the container body 1. The container bottom 11 is provided with a bottom stress-bearing structure 2, which is a composite structure that is inwardly concave and outwardly convex, used to withstand the static pressure of the contents. The lower part 12 is provided with a lower force-bearing structure 3 for bearing the supporting reaction force transmitted from the bottom 11 of the container and for bearing the tension of the middle part 13 of the container and being concave inward; the middle part 13 of the container is provided with a middle force-bearing structure 4 for bearing the internal pressure and the circumferential stress transmitted from the upper and lower force-bearing connecting rings 15 and being concave inward and / or convex inward; the upper part 14 of the container is provided with an upper force-bearing structure 5 for bearing the internal negative pressure during the cooling stage and being concave inward; through the stress gradient transmission and coordinated dispersion design of the force-bearing connecting rings 15, the bottom force-bearing structure 2, the lower force-bearing structure 3, the middle force-bearing structure 4 and the upper force-bearing structure 5, the overall deformation of the container body 1 during the high-temperature filling and subsequent cooling process is controlled within 0.5%, thereby achieving the stability of the shape and structure. This utility model adds force-bearing connecting rings between adjacent parts of the lower, middle, and upper parts of the container, and provides corresponding force-bearing structures on the bottom, lower, middle, and upper parts of the container, which makes the utility model less prone to deformation and effectively improves its structural stability and reliability.

[0038] This invention features load-bearing connecting rings 15 between the lower part 12 and the middle part 13 of the container, and between the middle part 13 and the upper part 14 of the container, which prevents deformation. Simultaneously, load-bearing connecting rings and corresponding load-bearing structures are provided at key parts of the packaging container to achieve directional reinforcement, avoiding the traditional practice of increasing the overall wall thickness to improve strength. Therefore, this invention achieves lightweighting and cost reduction, significantly enhancing the market competitiveness of large-capacity high-temperature filling packaging containers.

[0039] This utility model, through its unique stress-bearing connecting ring 15 and different stress-bearing structure designs, effectively disperses stress through a reasonable structural layout, significantly improving the high-temperature resistance and shape stability of the packaging container without substantially increasing material and manufacturing costs.

[0040] Specifically, the bottom force-bearing structure 2 includes a bottom force-bearing groove 21 recessed inward on the bottom 11 of the container. The bottom wall of the bottom force-bearing groove 21 has an outwardly protruding bottom force-bearing protrusion 22. The front and rear ends of the bottom force-bearing protrusion 22 are respectively connected to the corresponding side walls of the bottom force-bearing groove 21. In this embodiment, the overall structural strength of the container bottom can be improved by the cooperation between the inwardly recessed bottom force-bearing groove and the outwardly protruding bottom force-bearing protrusion.

[0041] Specifically, the bottom stress-bearing structure 2 also includes a bottom stress-bearing rib 23 protruding outward from the bottom wall of the bottom stress-bearing groove 21, located between the bottom stress-bearing protrusion 22 and the corresponding side wall of the bottom stress-bearing groove 21. One end of the bottom stress-bearing rib 23 is connected to the corresponding side of the bottom stress-bearing protrusion 22, and the other end of the bottom stress-bearing rib 23 is connected to the corresponding side wall of the bottom stress-bearing groove 21. Through the bottom stress-bearing groove, the bottom stress-bearing protrusion, and the bottom stress-bearing rib, the internal pressure at the bottom of the container can be dispersed to more directions, significantly reducing the probability of local deformation at the bottom of the container.

[0042] like Figure 1-5 As shown, in order to improve structural strength and reduce the probability of deformation, the bottom force-bearing protrusion 22 is provided with an inwardly recessed protrusion force-bearing cavity 221 at the bottom, and multiple protrusion force-bearing grooves 222 are distributed at intervals around the protrusion force-bearing cavity 221.

[0043] like Figure 1-5 As shown, in order to improve structural strength and reduce the probability of deformation, the lower force-bearing structure 3 includes a plurality of lower force-bearing grooves 31 that are spaced apart circumferentially on the lower part 12 of the container and recessed downwards, and the lower side of the lower force-bearing grooves 31 extends to the bottom 11 of the container.

[0044] like Figure 1-5 As shown, to improve structural strength and reduce the probability of deformation, the central load-bearing structure 4 includes central load-bearing grooves 41 spaced circumferentially on the central part 13 of the container and recessed inwards. The vertical length of each central load-bearing groove 41 is greater than its horizontal width. Each central load-bearing groove 41 has an outwardly protruding central load-bearing protrusion 42 on its inner bottom wall. The central load-bearing protrusion 42 has multiple central load-bearing grooves 43 spaced vertically and recessed inwards. The vertical length of each central load-bearing groove 43 is less than its horizontal width. The central load-bearing structure 4 also includes a central load-bearing groove 44 recessed inwards on the central part 13 of the container and located between two adjacent central load-bearing grooves 41. The vertical length of the central load-bearing groove 44 is greater than the vertical length of the central load-bearing groove 41, and the horizontal width of the central load-bearing groove 44 is less than the horizontal width of the central load-bearing groove 41.

[0045] like Figure 1-5As shown, to improve structural strength and reduce the probability of deformation, the upper load-bearing structure 5 includes an upper load-bearing groove 51 that is circumferentially spaced on the upper part 14 of the container and recessed inward. Each side wall of the upper load-bearing groove 51 is inclined from the outside inward toward the center of the upper load-bearing groove 51. The upper load-bearing structure 5 also includes an upper load-bearing groove 52 that is circumferentially spaced on the upper part 14 and recessed inward. The upper load-bearing groove 52 is located above the upper load-bearing groove 51. The vertical length of the upper load-bearing groove 52 is greater than its horizontal width, and the connection between the upper and lower side walls of the upper load-bearing groove 52 and its inner bottom wall forms an arc-shaped surface, such as a wave surface, which can buffer the tensile stress caused by the cooling and contraction of the upper part of the container.

[0046] To improve the structural strength of the load-bearing connecting ring 15, annular reinforcing ribs are provided on the inner wall of the load-bearing connecting ring 15.

Claims

1. A high-temperature filling and large-capacity packaging container, characterized in that... It includes a container body (1), which is composed of a container bottom (11), a container lower part (12), a container middle part (13) and a container upper part (14) connected in sequence; A stress-bearing connecting ring (15) is provided between the lower part (12) of the container and the middle part (13) of the container, and between the middle part (13) of the container and the upper part (14) of the container. The stress-bearing connecting ring (15) is an inwardly concave ring structure used to balance the circumferential stress of the upper and lower parts of the container body (1) during high-temperature filling and to prevent stress from being concentrated and transmitted to other areas of the container body (1). The bottom of the container (11) is provided with a bottom force-bearing structure (2), which is a composite structure that is concave inward and convex outward, and is used to bear the static pressure of the contents; The lower part (12) of the container is provided with a supporting reaction force transmitted from the bottom (11) of the container and a lower force-bearing structure (3) that bears the tension of the middle part (13) of the container and is recessed inward. The container has a central force-bearing structure (4) in the middle (13) for bearing the internal pressure and the circumferential stress transmitted by the upper and lower force-bearing connecting rings (15), and is concave inward and / or convex outward. The upper part (14) of the container is provided with an upper force-bearing structure (5) that is recessed inward to withstand the internal negative pressure during the cooling stage; Through the stress gradient transfer and coordinated dispersion design of the stress-bearing connecting ring (15), bottom stress structure (2), lower stress structure (3), middle stress structure (4) and upper stress structure (5), the overall deformation of the container body (1) during high-temperature filling and subsequent cooling process is controlled within 0.5%, thus achieving shape and structure stability.

2. The high-temperature filling and large-capacity packaging container according to claim 1, characterized in that... The bottom force-bearing structure (2) includes a bottom force-bearing groove (21) that is recessed inward on the bottom (11) of the container. The bottom wall of the bottom force-bearing groove (21) is provided with a bottom force-bearing protrusion (22) that protrudes outward. The front and rear ends of the bottom force-bearing protrusion (22) are respectively connected to the corresponding side walls of the bottom force-bearing groove (21).

3. The high-temperature filling and large-capacity packaging container according to claim 2, characterized in that... The bottom force-bearing structure (2) further includes a bottom force-bearing rib (23) that is provided on the bottom wall of the bottom force-bearing groove (21) and protrudes outward between the bottom force-bearing protrusion (22) and the corresponding side wall of the bottom force-bearing groove (21). One end of the bottom force-bearing rib (23) is connected to the corresponding side of the bottom force-bearing protrusion (22), and the other end of the bottom force-bearing rib (23) is connected to the corresponding side wall of the bottom force-bearing groove (21).

4. A high-temperature filling and large-capacity packaging container according to claim 2 or 3, characterized in that... The bottom force-bearing protrusion (22) has an inwardly recessed force-bearing cavity (221) at its bottom, and multiple force-bearing grooves (222) are distributed at intervals around the periphery of the force-bearing cavity (221).

5. A high-temperature filling and large-capacity packaging container according to claim 1, characterized in that... The lower force-bearing structure (3) includes a plurality of lower force-bearing grooves (31) that are spaced apart circumferentially on the lower part (12) of the container and recessed downward, and the lower side of the lower force-bearing grooves (31) extends to the bottom (11) of the container.

6. The high-temperature filling and large-capacity packaging container according to claim 1, characterized in that... The central force-bearing structure (4) includes a central force-bearing groove (41) that is circumferentially spaced on the central part (13) of the container and recessed inward. The vertical length of the central force-bearing groove (41) is greater than its horizontal width. The bottom wall of each central force-bearing groove (41) is provided with a central force-bearing protrusion (42) that protrudes outward. The central force-bearing protrusion (42) is provided with multiple central force-bearing grooves (43) that are spaced vertically and recessed inward. The vertical length of the central force-bearing grooves (43) is less than its horizontal width.

7. A high-temperature filling and large-capacity packaging container according to claim 6, characterized in that... The central force-bearing structure (4) further includes a central force-bearing groove (44) that is recessed inward between two adjacent central force-bearing grooves (41) and located on the central part (13) of the container. The vertical length of the central force-bearing groove (44) is greater than the vertical length of the central force-bearing groove (41), and the horizontal width of the central force-bearing groove (44) is less than the horizontal width of the central force-bearing groove (41).

8. A high-temperature filling and large-capacity packaging container according to claim 1, characterized in that... The upper force-bearing structure (5) includes an upper force-bearing groove (51) that is circumferentially spaced on the upper part (14) of the container and recessed inward. Each side wall of the upper force-bearing groove (51) is inclined from the outside to the center of the upper force-bearing groove (51).

9. A high-temperature filling and large-capacity packaging container according to claim 1 or 8, characterized in that... The upper force-bearing structure (5) includes an upper force-bearing groove two (52) that is circumferentially spaced on the upper part (14) of the container and recessed inward. The upper force-bearing groove two (52) is located above the upper force-bearing groove one (51). The upper force-bearing groove two (52) has a vertical length greater than its horizontal width, and the upper and lower side walls of the upper force-bearing groove two (52) are connected to its inner bottom wall to form an arc-shaped surface.

10. A high-temperature filling and large-capacity packaging container according to claim 1, characterized in that... The inner wall of the force-bearing connecting ring (15) is provided with annular reinforcing ribs.

Images