Bottle bottom structure, bottle and bottle blowing mold
By optimizing the claw valve design of the bottom structure of the bottle, the balance between weight reduction and performance of the plastic bottle is solved, the resistance to top pressure and axial load resistance is improved, and the manufacturing energy consumption is reduced.
Patent Information
- Application Number
- CN202422571267.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-23
AI Technical Summary
The existing plastic bottle bottom structure is difficult to balance between weight reduction and performance requirements, especially in terms of resistance to top pressure and axial load, and the manufacturing process has high energy consumption.
A bottle bottom structure is designed, including a bottle bottom concave surface with a bottom center, and a plurality of claw flaps and grooves are provided. The claw flaps design increases continuity and smoothness with the bottom center, and optimizes the shape of the bottle bottom by adjusting the width and angle of the claw flaps to improve pressure bearing capacity.
While reducing weight, the resistance to top pressure and axial load resistance of the bottle bottom is improved, the pressure of blown molding is reduced, the performance requirements are met and manufacturing energy consumption is reduced.
Smart Images
Figure CN223174528U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bottle structures, and particularly relates to a bottle bottom structure, a bottle and a blow molding die. Background Art
[0002] In the prior art, the bottom of a plastic bottle supports the whole bottle and its contents. During use, the plastic bottle has requirements for capabilities such as good resistance to top pressure, axial load, internal pressure, etc. In order to make up for the inconsistencies in stress, strength, etc. caused by the low material uniformity of the bottle bottom and the problems limited by the strength of the bottle bottom structure, generally, the method of increasing the thickness of the bottle bottom is adopted to ensure that the plastic bottle meets the performance requirements.
[0003] With the development trend of building an environmental protection and carbon reduction society, plastic bottles need to reduce weight to reduce the use of raw materials, while ensuring their performance and reducing energy consumption during the manufacturing process. This puts higher requirements on the bottle bottom structure and corresponding molds of plastic bottles. Content of the Utility Model
[0004] In order to overcome at least some deficiencies in the prior art, the utility model provides a bottle bottom structure, a bottle and a blow molding die.
[0005] On the one hand, a bottle bottom structure is provided, which includes a bottle bottom concave surface with a bottom center. A plurality of claw petals distributed around the bottom center are arranged on the bottle bottom concave surface, and a groove is arranged between adjacent two claw petals; the claw petals include a first claw petal and a second claw petal. One end of the first claw petal is connected to the bottom center, and the other end extends obliquely downward away from the bottom center; one end of the second claw petal is connected to the other end of the first claw petal, and the other end extends obliquely outward towards the bottle body direction; the claw petal width of the first claw petal gradually increases along its extending direction, and the claw petal width of the second claw petal first increases and then decreases along its extending direction.
[0006] A further preferred scheme is that the bottle bottom concave surface is a spherical crown surface structure with a height not greater than the radius.
[0007] A further preferred scheme is that six claw petals are arranged on the bottle bottom concave surface.
[0008] A further preferred scheme is that the ratio of the grounding width w of the first claw petal to the bottle bottom diameter D is 0.08 - 0.12.
[0009] A further preferred scheme is that the ratio of the gap d1 between adjacent first claw petals to the bottle bottom diameter D is 0.21 - 0.25.
[0010] A further preferred scheme is that the ratio of the stable distance s to the bottle bottom diameter D is 0.29 - 0.32.
[0011] Further preferably, the ratio of the ground clearance d2 at the bottom center to the height H of the bottle bottom is 0.2 to 0.3.
[0012] Further preferably, the slope i1 of the first claw flap is 19° to 22°, and the slope i2 of the second claw flap is 24° to 26°.
[0013] On the other hand, a bottle is also provided, including a bottle body and the above bottle bottom structure.
[0014] On the other hand, a blow molding die is also provided, having a molding cavity that at least defines the outer surface of the above bottle bottom structure.
[0015] The beneficial effects of the present utility model are as follows: By setting one end of the first claw flap to be connected to the bottom center, the continuity and smoothness of the connection between the claw flap and the bottom center are higher, avoiding a position that is difficult to mold between the first claw flap and the bottom center, which is beneficial to the molding of the bottle bottom. At the same time, the gas pressure for blow molding the bottle is reduced. The width of the second claw flap along its extension direction first increases and then decreases, which can increase the contour area retained on the concave surface of the bottle bottom, helping to improve the ability of the bottle bottom to withstand internal pressure, so that the bottle bottom can still meet the performance requirements after weight reduction. Description of the Drawings
[0016] Figure 1 It is the bottom view of the bottle bottom structure of this embodiment;
[0017] Figure 2 It is the front view of the bottle bottom structure of this embodiment;
[0018] Figure 3 It is the longitudinal sectional view of the bottle bottom structure of this embodiment;
[0019] Figure 4 It is the front view of the bottle of this embodiment. Detailed Embodiments
[0020] [[ID=3,5]]To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.
[0021] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then such directional indications will also change accordingly.
[0022] In addition, if the descriptions such as "first" or "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0023] As Figures 1 to 4 shown, this embodiment discloses a bottle bottom structure, which includes a bottle bottom concave surface with a bottom center 1. The bottle bottom concave surface is a spherical crown surface structure with a height not greater than the radius. A plurality of claw petals 2 distributed around the bottom center 1 are arranged on the bottle bottom concave surface, and a groove 3 is arranged between two adjacent claw petals 2; the claw petals 2 include a first claw petal 21 and a second claw petal 22. One end of the first claw petal 21 is connected to the bottom center 1, and the other end extends obliquely downward away from the bottom center 1; one end of the second claw petal 22 is connected to the other end of the first claw petal 21, and the other end extends obliquely outward towards the bottle body and is connected to the bottle body; the claw petal width of the first claw petal 21 gradually increases along its extending direction, and the claw petal width of the second claw petal 22 first increases and then decreases along its extending direction. In this embodiment, one end of the first claw petal 21 is connected to the bottom center 1, making the connection between the claw petal 2 and the bottom center 1 more continuous and smooth, avoiding a position that is difficult to form between the first claw petal 21 and the bottom center 1, being beneficial to the forming of the bottle bottom, and simultaneously reducing the gas pressure for blow molding the bottle; the claw petal width of the second claw petal 22 first increases and then decreases along its extending direction, which can increase the contour area retained on the bottle bottom concave surface, helping to improve the ability of the bottle bottom to withstand internal pressure, so that the bottle bottom can still meet the performance requirements after weight reduction.
[0024] In this embodiment, six claw petals 2 are arranged on the bottle bottom concave surface. The ratio of the grounding width w of the first claw petal 21 to the bottle bottom diameter D is 0.08 - 0.12, preferably 0.1. The grounding width w is the length of the longest arc where the first claw petal 21 contacts the horizontal plane after the bottle is placed on the horizontal plane, and the center of the longest arc is on the central axis of the bottle bottom. In the prior art, this ratio is about 0.05. Compared with the prior art, by increasing the grounding width w of the first claw petal 21, it helps to improve the ability of the bottle bottom to resist axial loads and the deformation ability against top pressure.
[0025] Accordingly, the gap d1 between adjacent first claw petals 21 will decrease, but the stable distance s remains basically unchanged. The ratio of the gap d1 between adjacent first claw petals 21 to the bottom diameter D of the bottle is 0.21 - 0.25, preferably 0.23. The ratio of the stable distance s to the bottom diameter D of the bottle is 0.29 - 0.32, preferably 0.30, to maintain the stability of the bottom structure of the bottle. The stable distance s is the distance between the longest arc where the first claw petal 21 contacts the horizontal plane and the central axis of the bottom of the bottle after the bottle is placed on the horizontal plane. In the prior art, the ratio of the gap d1 between adjacent first claw petals 21 to the bottom diameter D of the bottle is about 0.29, and the ratio of the stable distance s to the bottom diameter D of the bottle is about 0.31.
[0026] In this embodiment, the ratio of the ground clearance d2 of the bottom center 1 to the bottom height H of the bottle is 0.2 - 0.3, preferably 0.25. In the prior art, this ratio is about 0.18. Compared with the prior art, by increasing the ground clearance d2 of the bottom center 1, the maximum height h of the first claw petal 21 is increased, and the blowing distance from the bottle mouth to the first claw petal 21 is reduced, which is beneficial to the forming of the bottom of the bottle.
[0027] Accordingly, the slope i1 of the first claw petal surface 21 is increased, and the slope i2 of the second claw petal surface 22 remains basically unchanged, which helps the flow of the material and is beneficial to the forming of the bottom of the bottle. In the bottom structure of the bottle in this embodiment, the slope i1 of the first claw petal surface 21 is 19° - 22°, preferably 20°, and the slope i2 of the second claw petal surface 22 is 24° - 26°, preferably 25°. In the prior art, the slope i1 of the first claw petal surface 21 is 14°, and the slope i2 of the second claw petal surface 22 is 24°.
[0028] Based on the above-disclosed bottom structure of a bottle, this embodiment also discloses a bottle, the bottom of which is provided with the above bottom structure of the bottle.
[0029] Based on the above-disclosed bottle, this embodiment also discloses a blow molding die, which has a molding cavity that at least defines the outer surface of the above bottom structure of the bottle. As an implementation manner, the blow molding die includes a bottom die and two half dies. The bottom die and the two half dies are configured to form the above molding cavity, which defines the outer surface of the part of the bottle other than the bottle mouth, and the outer surface of the bottom structure of the bottle is defined by or mainly by the bottom die.
[0030] The above is only the preferred embodiment of the present invention, and all technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.
Claims
1. A bottom structure of a bottle, characterized in that: It includes a concave surface at the bottom of the bottle with a bottom center, on which a plurality of claw petals distributed around the bottom center are provided, and a groove is arranged between two adjacent claw petals; the claw petals include a first claw petal and a second claw petal, one end of the first claw petal is connected to the bottom center, and the other end extends obliquely downward away from the bottom center; one end of the second claw petal is connected to the other end of the first claw petal, and the other end extends obliquely outward towards the bottle body; the width of the claw petal of the first claw petal gradually increases along its extending direction, and the width of the claw petal of the second claw petal first increases and then decreases along its extending direction.
2. The bottom structure of a bottle according to claim 1, characterized in that: The concave surface at the bottom of the bottle is a spherical crown surface structure with a height not greater than the radius.
3. A bottom structure of a bottle according to claim 1, characterized in that: Six claw petals are provided on the concave surface at the bottom of the bottle.
4. A bottom structure of a bottle according to any one of claims 1 to 3, characterized in that: The ratio of the grounding width w of the first claw petal to the bottom diameter D of the bottle is 0.08 - 0.
12.
5. A bottom structure of a bottle according to any one of claims 1-3, characterized in that: The ratio of the gap d1 between adjacent first claw petals to the bottom diameter D of the bottle is 0.21 - 0.
25.
6. A bottom structure of a bottle according to any one of claims 1-3, characterized in that: The ratio of the stable distance s to the bottom diameter D of the bottle is 0.29 - 0.
32.
7. A bottom structure of a bottle according to any one of claims 1-3, characterized in that: The ground clearance d2 of the bottom center to the bottom height H of the bottle is 0.2 - 0.
3.
8. A bottom structure of a bottle according to any one of claims 1-3, characterized in that: The slope i1 of the first claw petal is 19° - 22°, and the slope i2 of the second claw petal is 24° - 26°.
9. A bottle, characterized in that: It includes a bottle body and the bottom structure according to any one of claims 1 - 8.
10. A blow molding die having a molding cavity, characterized in that: The forming cavity at least defines the outer surface of the bottom structure according to any one of claims 1 - 8.