A stackable polyethylene blow molded tub
By designing a raised ring and flange structure for the polyethylene blow-molded barrel, the problems of difficult separation and deformation during stacking of blow-molded barrels were solved, achieving a more stable stacking and separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINGPING GAOKE PLASTIC IND CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-28
AI Technical Summary
When existing polyethylene blow-molded drums are stacked, the outer and inner drums are difficult to separate, and stacking can easily lead to deformation of the drum opening.
The design incorporates a convex ring and flange structure. The bottom of the convex ring has an annular platform, and the convex ring and flange are detachably connected. The upper part of the barrel gradually increases in wall thickness, and the annular platform at the bottom of the convex ring overlaps the flange, increasing the center of gravity and reducing radial forces. The barrel opening is designed as a cone to reduce the risk of deformation.
This makes it easier to separate blow-molded buckets, reduces the risk of tipping over and bucket mouth deformation during stacking, and improves the stable fit between the bucket lid and the bucket mouth.
Smart Images
Figure CN224563022U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of blow-molded containers, and more particularly to a stackable polyethylene blow-molded barrel. Background Technology
[0002] Polyethylene blow-molded drums are used as storage containers for raw materials in the chemical and other fields. Existing polyethylene blow-molded drums are usually designed in a conical shape, which allows multiple drums to be stacked. However, when existing blow-molded drums are stacked together, the outer drum and the inner drum are stuck together, and the two drums are difficult to separate under friction or negative pressure. Utility Model Content
[0003] In view of this, this application provides a stackable polyethylene blow-molded barrel, which solves the problems in the prior art, makes it easier to separate stacked blow-molded barrels, and reduces the risk of barrel mouth deformation caused by stacking.
[0004] The stackable polyethylene blow-molded bucket provided in this application adopts the following technical solution:
[0005] A stackable polyethylene blow-molded bucket includes a bucket body and a bucket lid. A flange is provided on the edge of the bucket opening at the top of the bucket body. The bucket lid and the flange are detachably connected. An annular area in the upper half of the bucket body protrudes radially outward to form a convex ring. An annular platform is provided at the bottom of the convex ring. The bottom surface of the annular platform is perpendicular to the height direction of the bucket body. The area of the bucket body below the convex ring is a conical bucket body. The wall thickness of the bucket body gradually increases from top to bottom. The annular platform of the first blow-molded bucket is used to overlap the flange of the second blow-molded bucket. The flange is provided with an annular overlapping surface for supporting the annular platform. The annular overlapping surface is perpendicular to the height direction of the bucket body.
[0006] When the annular platform of one blow-molded barrel overlaps with the annular overlap surface of the second blow-molded barrel, the portion of the first blow-molded barrel located below the convex ring is spaced apart from the inner wall of the second blow-molded barrel.
[0007] Optionally, the length of the convex ring along the height direction of the barrel accounts for 25-30% of the total barrel height. The convex ring includes a bottom wall, a side wall, and a top wall from bottom to top. The bottom wall includes an annular platform and an annular conical wall. The inner ring of the annular platform is connected to the conical barrel body. The inner ring of the annular platform is connected to the inner ring of the annular conical wall. The inner ring of the annular conical wall is connected to the bottom of the side wall of the convex ring. The annular conical wall gradually expands from bottom to top, and the angle between the annular conical wall and the central axis of the barrel body is greater than the angle between the conical barrel body and the central axis of the barrel body.
[0008] The top wall of the convex ring is tapered and gradually tapers from bottom to top. The inner diameter of the inner ring of the top wall of the convex ring is smaller than the outer diameter of the outer ring of the annular platform.
[0009] The inner ring of the top wall of the convex ring is provided with an annular ring, which is part of the barrel body, and the top of the annular ring serves as the barrel opening.
[0010] Optionally, the annular ring is an arc-shaped structure that is concave inward along the radial direction.
[0011] Optionally, the bottom wall of the convex ring is provided with at least two upwardly recessed grooves, which extend from the inner ring of the annular platform to the outer ring of the annular conical wall.
[0012] Optionally, the connection positions of the inner ring of the annular platform and the conical barrel body, the connection positions of the annular platform and the annular conical wall, the connection positions of the annular conical wall and the side wall of the annular platform, the connection positions of the side wall and the top wall of the annular platform, and the connection positions of the top wall of the annular platform and the annular ring are all rounded.
[0013] Optionally, the sidewall of the protruding ring is tapered, and the taper of the sidewall of the protruding ring is consistent with that of the tapered barrel body.
[0014] Optionally, the length of the groove in the circumferential direction is 8 to 10 centimeters.
[0015] Optionally, the upper surface of the flange is provided with an annular support ring, which is used to abut against the outer surface of the annular conical wall when the annular platform and the annular overlapping surface overlap.
[0016] Optionally, the stackable polyethylene blow-molded barrel also includes a clamp, by which the barrel lid and the flange are detachably connected.
[0017] Optionally, the top surface of the bucket lid is provided with a circular groove corresponding to the bottom of the bucket body.
[0018] In summary, this application includes the following beneficial technical effects:
[0019] When the annular platform of one blow-molded bucket overlaps the annular overlapping surface of the second blow-molded bucket, the portion of the first blow-molded bucket located below the convex ring is spaced apart from the inner wall of the second blow-molded bucket. This avoids the two blow-molded buckets being too close together when stacked, which would make separation difficult. Simultaneously, because the upper blow-molded bucket extends significantly beyond the lower blow-molded bucket, compared to the traditional method of overlapping the edges of the two bucket openings, the overall center of gravity of the stacked multiple blow-molded buckets increases. Therefore, in this application, the bucket body is designed with a gradually increasing wall thickness from top to bottom, increasing the weight of the bucket bottom and lowering the overall center of gravity of the stacked multiple blow-molded buckets, reducing the risk of tipping over. A counterweight can also be embedded on the outer surface of the bottom wall of the bucket body to further lower the overall center of gravity. Furthermore, in this application, the bottom of the convex ring has an annular platform overlapping the annular overlapping surface of the flange. The force between the two buckets is mainly in the direction of bucket height, reducing the radial force of the upper blow-molded bucket on the opening of the lower blow-molded bucket, reducing the risk of bucket opening deformation, and ensuring a stable fit between the bucket lid and the bucket opening. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a single stackable polyethylene blow-molded barrel according to this application;
[0022] Figure 2 This is a cross-sectional schematic diagram of two blow-molded barrels stacked together according to this application;
[0023] Figure 3 This is a schematic diagram showing the external structure of two blow-molded barrels stacked together according to this application;
[0024] Figure 4 This is a schematic diagram of the blow-molded barrel structure with an annular support ring of this application.
[0025] Explanation of reference numerals in the attached drawings: 1. Barrel body; 11. Annular ring; 2. Barrel lid; 21. Circular groove; 3. Flange; 31. Annular support ring; 4. Protruding ring; 41. Annular platform; 42. Annular conical wall; 43. Side wall; 44. Top wall; 45. Groove; 5. Conical barrel body; 6. Clamp. Detailed Implementation
[0026] The embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0028] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0030] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.
[0031] This application provides a stackable polyethylene blow-molded bucket.
[0032] like Figures 1 to 3As shown, a stackable polyethylene blow-molded barrel includes a barrel body 1 and a barrel lid 2. A flange 3 is provided on the edge of the barrel opening at the top of the barrel body 1. The barrel lid 2 and the flange 3 are detachably connected. The annular area of the upper half of the barrel body 1 protrudes radially outward to form a convex ring 4. An annular platform 41 is provided at the bottom of the convex ring 4. The bottom surface of the annular platform 41 is perpendicular to the height direction of the barrel body 1. The area of the barrel body 1 below the convex ring 4 is a conical barrel body 5. The wall thickness of the barrel body 1 gradually increases from top to bottom. The annular platform 41 of the first blow-molded barrel located at the top is used to overlap the flange 3 of the second blow-molded barrel located at the bottom. The flange 3 is provided with an annular overlapping surface for supporting the annular platform 41. The annular overlapping surface is perpendicular to the height direction of the barrel body 1.
[0033] In this design, when the annular platform 41 of one blow-molded barrel overlaps with the annular overlapping surface of the second blow-molded barrel, the portion of the first blow-molded barrel located below the convex ring 4 is spaced apart from the inner wall of the second blow-molded barrel. This avoids the two blow-molded barrels being too close together when stacked, which would make separation difficult. At the same time, since the upper blow-molded barrel extends significantly beyond the lower blow-molded barrel, the overall center of gravity of the stacked blow-molded barrels increases compared to the traditional method of overlapping the edges of the two barrel openings. Therefore, in this application, the barrel body 1 is designed with a gradually increasing wall thickness from top to bottom to increase the weight of the barrel bottom, lower the overall center of gravity of the stacked blow-molded barrels, and reduce the risk of the stacked blow-molded barrels tipping over. A counterweight can also be embedded on the outer side of the bottom wall of the barrel body 1 to further lower the overall center of gravity. Furthermore, in this application, the annular platform 41 at the bottom of the convex ring 4 overlaps on the annular overlapping surface of the flange 3, and the force between the two barrels is mainly the force in the direction of barrel height, which reduces the radial force of the upper blow-molded barrel on the barrel opening of the lower blow-molded barrel, reduces the risk of barrel opening expansion and deformation, and ensures a stable fit between the barrel cover 2 and the barrel opening.
[0034] The stackable polyethylene blow-molded bucket also includes a clamp 6, and the bucket lid 2 and the flange 3 are detachably connected by the clamp 6, which surrounds the outer circumferential surface of the flange 3 and the bucket lid 2.
[0035] The convex ring 4 includes a bottom wall, a side wall 43, and a top wall 44 from bottom to top. The bottom wall includes an annular platform 41 and an annular conical wall 42. The inner ring of the annular platform 41 is connected to the conical barrel body 5. The inner ring of the annular platform 41 is connected to the inner ring of the annular conical wall 42. The inner ring of the annular conical wall 42 is connected to the bottom of the side wall 43 of the convex ring 4. The annular conical wall 42 gradually expands from bottom to top, and the angle between the annular conical wall 42 and the central axis of the barrel body 1 is greater than the angle between the conical barrel body 5 and the central axis of the barrel body 1.
[0036] The top wall 44 of the convex ring 4 is tapered, and the top wall 44 of the convex ring 4 gradually tapers from bottom to top. The inner diameter of the inner ring of the top wall 44 of the convex ring 4 is smaller than the outer diameter of the outer ring of the annular platform 41.
[0037] An annular ring 11 is provided on the inner ring of the top wall 44 of the convex ring 4. The annular ring 11 is part of the barrel body 1, and the top of the annular ring 11 serves as the barrel opening. In one embodiment, the length of the annular ring 11 along the barrel height direction accounts for 3-7% of the total height of the barrel body 1. In this application, the length of the convex ring 4 along the barrel height direction accounts for 25-30% of the total barrel height. The convex ring 4 is positioned close to the barrel opening. The design of the height of the convex ring 4, combined with the design of the shape of the convex ring 4, ensures that the center of gravity of the barrel body 1 is not too high, while facilitating the blow molding process of the barrel body 1.
[0038] The annular ring 11 is an arc-shaped structure that is concave in the radial direction, so that the convex ring 4 and the flange 3 are connected by the arc-shaped structure. This facilitates blow molding while improving the connection strength between the convex ring 4 and the flange 3, making it less likely for stress concentration to occur at the inner ring position of the flange 3, and reducing the risk of breakage at the connection position between the flange 3 and the convex ring 4.
[0039] The sidewall 43 of the protruding ring 4 is tapered, and the taper of the sidewall 43 of the protruding ring 4 is the same as that of the tapered barrel body 5.
[0040] The connection positions of the inner ring of the annular platform 41 and the conical barrel 5, the connection positions of the annular platform 41 and the annular conical wall 42, the connection positions of the annular conical wall 42 and the side wall 43 of the annular platform 41, the connection positions of the side wall 43 and the top wall 44 of the annular platform 41, and the connection positions of the top wall 44 of the annular platform 41 and the annular ring 11 are all rounded.
[0041] The bottom wall of the convex ring 4 has at least two upwardly recessed grooves 45, which extend from the inner ring of the annular platform 41 to the outer ring of the annular conical wall 42. The grooves 45 create a gap in the contact between the convex ring 4 and the annular overlapping surface, ensuring communication between the cavity between two adjacent barrels and the outside environment. This prevents the air pressure in the cavity between adjacent barrels from falling below the external air pressure due to changes in the external environment, such as altitude changes, temperature changes, or compression of the barrel 1, which could lead to difficulties in separating the blow-molded barrels. In one embodiment, the grooves 45 may also extend upwards to a portion of the side wall 43 of the convex ring 4.
[0042] In one embodiment, the groove 45 has a circumferential length of 8 to 10 centimeters. This allows personnel to easily insert their hands into the groove 45 to apply force to the barrel 1, facilitating the separation of taller blow-molded barrels.
[0043] The top surface of the lid 2 is provided with a circular groove 21 corresponding to the bottom of the barrel body 1. After the barrel body filled with material is closed by the lid, the two blow-molded barrels can be stacked one on top of the other, with the bottom 1 of the upper blow-molded barrel located in the circular groove 21 of the lid 2 of the lower blow-molded barrel. The cooperation between the circular groove 21 and the bottom of the barrel reduces the relative displacement of the two stacked blow-molded barrels.
[0044] like Figure 4 As shown, in one embodiment, the upper surface of the flange 3 is provided with an annular support ring 31. The annular support ring 31 is used to abut against the outer surface of the annular conical wall 42 when the annular platform 41 and the annular overlapping surface overlap. Through the auxiliary support of the annular support ring 31 and the inclined surface on the convex ring 4, the radial and vertical forces on the upper and lower blow-molded barrels are simultaneously applied, reducing the force on the barrel opening while ensuring that the vertical force on the barrel opening is not excessive. This comprehensively considers the force on the barrel opening in multiple directions, reducing the risk of barrel opening deformation while avoiding vertical deformation of the barrel body 1. In this embodiment, a boss matching the inner surface of the annular support ring 31 can be provided on the barrel lid 2 to improve the fit between the barrel lid 2 and the barrel body 1.
[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A stackable polyethylene blow-molded bucket, characterized in that, The container includes a barrel body (1) and a barrel lid (2). A flange (3) is provided on the edge of the barrel opening at the top of the barrel body (1). The barrel lid (2) and the flange (3) are detachably connected. The annular area of the upper half of the barrel body (1) protrudes radially outward to form a convex ring (4). An annular platform (41) is provided at the bottom of the convex ring (4). The bottom surface of the annular platform (41) is perpendicular to the height direction of the barrel body (1). The area on the barrel body (1) below the convex ring (4) is a conical barrel body (5). The wall thickness of the barrel body (1) gradually increases from top to bottom. The annular platform (41) of the first blow-molded barrel is used to overlap the flange (3) of the second blow-molded barrel. An annular overlapping surface is provided on the flange (3) to support the annular platform (41). The annular overlapping surface is perpendicular to the height direction of the barrel body (1). When the annular platform (41) of one blow-molded barrel overlaps with the annular overlap surface of the second blow-molded barrel, the portion of the first blow-molded barrel located below the convex ring (4) is spaced apart from the inner wall of the second blow-molded barrel.
2. The stackable polyethylene blow-molded barrel according to claim 1, characterized in that, The length of the convex ring (4) along the height of the barrel accounts for 25-30% of the total barrel height. The convex ring (4) includes a bottom wall, a side wall (43) and a top wall (44) from bottom to top. The bottom wall includes an annular platform (41) and an annular conical wall (42). The inner ring of the annular platform (41) is connected to the conical barrel body (5). The inner ring of the annular platform (41) is connected to the inner ring of the annular conical wall (42). The inner ring of the annular conical wall (42) is connected to the bottom of the side wall (43) of the convex ring (4). The annular conical wall (42) gradually expands from bottom to top, and the angle between the annular conical wall (42) and the central axis of the barrel body (1) is greater than the angle between the central axis of the conical barrel body (5) and the central axis of the barrel body (1). The top wall (44) of the convex ring (4) is tapered, and the top wall (44) of the convex ring (4) gradually tapers from bottom to top. The inner diameter of the inner ring of the top wall (44) of the convex ring (4) is smaller than the outer diameter of the outer ring of the annular platform (41). The inner ring of the top wall (44) of the convex ring (4) is provided with an annular ring (11), which is part of the barrel body (1), and the top of the annular ring (11) is the barrel opening.
3. The stackable polyethylene blow-molded barrel according to claim 2, characterized in that, The annular ring (11) is an arc-shaped structure that is concave inward along the radial direction.
4. The stackable polyethylene blow-molded barrel according to claim 2, characterized in that, The bottom wall of the convex ring (4) is provided with at least two upwardly recessed grooves (45), which extend from the inner ring of the annular platform (41) to the outer ring of the annular conical wall (42).
5. The stackable polyethylene blow-molded barrel according to claim 2, characterized in that, The connection positions of the inner ring of the annular platform (41) and the conical barrel body (5), the connection positions of the annular platform (41) and the annular conical wall (42), the connection positions of the annular conical wall (42) and the side wall (43) of the annular platform (41), the connection positions of the side wall (43) and the top wall (44) of the annular platform (41), and the connection positions of the top wall (44) of the annular platform (41) and the annular ring (11) are all rounded.
6. The stackable polyethylene blow-molded barrel according to claim 2, characterized in that, The sidewall (43) of the protruding ring (4) is tapered, and the taper of the sidewall (43) of the protruding ring (4) is consistent with that of the tapered barrel body (5).
7. The stackable polyethylene blow-molded barrel according to claim 4, characterized in that, The groove (45) has a length of 8 to 10 centimeters in the circumferential direction.
8. The stackable polyethylene blow-molded barrel according to claim 2, characterized in that, The upper surface of the flange (3) is provided with an annular support ring (31), which is used to abut against the outer surface of the annular conical wall (42) when the annular platform (41) and the annular overlapping surface overlap.
9. The stackable polyethylene blow-molded barrel according to claim 1, characterized in that, The stackable polyethylene blow-molded bucket also includes a clamp (6), through which the bucket lid (2) and the flange (3) are detachably connected.
10. The stackable polyethylene blow-molded barrel according to claim 1, characterized in that, The top surface of the lid (2) is provided with a circular groove (21) corresponding to the bottom of the body (1).