Double-layer injection molding bottle with excellent pressure resistance

Abstract

The utility model discloses a double-layer injection-molded bottle with excellent anti-pressure ability, which relates to the field of injection-molded bottles and comprises a bottle body, a lining is arranged in the bottle body, a bottle cap is arranged at the top end of the outside of the lining, a middle piece is placed at the top end of the inside of the lining, and a threaded connection structure is arranged between the bottle body and the lining. The edge position of the middle piece is in a step shape, one side position of the top of the middle piece is integrally connected with a handle, the threaded connection structure comprises a threaded opening and a threaded ring, and the threaded opening is fixedly installed in the center position of the bottom inside the bottle body. According to the double-layer injection molding bottle with the excellent anti-pressure capability, the overall strength of the bottle bottom can be improved, the bottle bottom is more stable when bearing pressure or impact, the risk of deformation or fracture is reduced, meanwhile, the pressure borne by the bottle bottom can be dispersed through the thread design, stress concentration is avoided, and therefore the anti-pressure capability of the bottle is improved, and the service life of the bottle is prolonged. And the device is suitable for packaging scenes needing stacking or long-distance transportation.

Description

Technical Field

[0001] This utility model relates to the field of injection molded bottles, and in particular to a double-walled injection molded bottle with excellent pressure resistance. Background Technology

[0002] In the cosmetics industry, cream-based cosmetics all need to be packaged in injection bottles or bags. To protect cosmetics, injection bottles are usually designed with a double-layer structure, which can provide protection in case of a fall.

[0003] Chinese Patent Publication No. CN211933003U discloses a reusable cosmetic packaging bottle, comprising: an outer bottle, an inner bottle disposed inside the outer bottle for holding cosmetics, a dustproof sheet covering the inner bottle, and a cap covering the outer bottle and the dustproof sheet. The outer bottle has a small hole at its bottom, penetrating the bottom of the outer bottle; the outer bottle and the inner bottle are movably connected. This invention allows for direct replacement of only the inner bottle, simplifying the replacement operation and enabling multiple replacements. This significantly enhances the secondary use value of cosmetic packaging bottles, reduces replacement costs, improves user experience, and alleviates environmental pressure.

[0004] However, existing cosmetic injection-molded bottles typically have their liner and bottle body connected by a simple snap-fit ​​method. When the bottle body is impacted, the liner bears a lot of pressure and is prone to breakage, especially the bottom of the bottle which bears concentrated pressure and has poor pressure resistance. Utility Model Content

[0005] The main objective of this invention is to provide a double-layer injection molded bottle with excellent pressure resistance, which can effectively solve the technical problem in the prior art where the bottle bottom bears concentrated pressure, has poor pressure resistance, and is prone to breakage.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A double-walled injection-molded bottle with excellent pressure resistance includes a bottle body, an inner liner inside the bottle body, a bottle cap at the outer top of the inner liner, a middle piece at the inner top of the inner liner, and a threaded connection structure between the bottle body and the inner liner.

[0008] As a further embodiment of this utility model, the edge of the middle piece is stepped, and a handle is integrally connected to one side of the top of the middle piece.

[0009] As a further embodiment of this utility model, the threaded connection structure includes a threaded opening and a threaded ring. The threaded opening is fixedly installed at the center of the bottom inside the bottle body, and the threaded ring is fixedly connected to the center of the bottom outside the liner. The threaded ring is threadedly connected to the liner.

[0010] As a further embodiment of this utility model, a retaining ring is integrally connected to the outer side of the liner near the upper position, and a retaining slot is provided at the top of the inner side of the bottle body, with the retaining ring engaging with the retaining slot.

[0011] As a further embodiment of this utility model, the outer top position of the liner is provided with an external thread, which is connected to the bottle cap thread.

[0012] As a further embodiment of this invention, a sealing gasket is placed on the top of the inside of the bottle cap.

[0013] The beneficial effects of this utility model are as follows:

[0014] By incorporating a threaded ring with a threaded opening, the threaded structure increases the overall strength of the bottle bottom, making it more stable under pressure or impact and reducing the risk of deformation or breakage. At the same time, the threaded design can distribute the pressure on the bottle bottom, avoiding stress concentration, thereby improving the bottle's pressure resistance. It is suitable for packaging scenarios that require stacking or long-distance transportation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a double-layer injection-molded bottle with excellent pressure resistance according to this utility model;

[0016] Figure 2 This is an exploded view of a double-layer injection-molded bottle with excellent pressure resistance according to this utility model;

[0017] Figure 3 This is a top view of the middle section of a double-layer injection-molded bottle with excellent pressure resistance according to this utility model.

[0018] In the picture: 1. Bottle body; 2. Bottle cap; 3. Inner liner; 4. Middle piece; 5. Screw head; 6. Bayonet; 7. Threaded ring; 8. Snap ring; 9. Handle. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Combination Figures 1-3 A double-walled injection-molded bottle with excellent pressure resistance includes a bottle body 1, an inner liner 3 inside the bottle body 1, a bottle cap 2 at the top outer position of the inner liner 3, a middle piece 4 at the top inner position of the inner liner 3, and a threaded connection structure between the bottle body 1 and the inner liner 3.

[0022] See Figure 1 Furthermore, it is found that the edge of the middle piece 4 is stepped, and the top side of the middle piece 4 is integrally connected to the handle 9.

[0023] Specifically, cosmetics are placed into the inner liner 3, and the bottle cap 2 is closed for packaging and sale. The middle piece 4 can prevent cosmetics from spilling into the bottle cap 2, reducing the loss of cosmetics.

[0024] Example 2

[0025] See Figure 2 Furthermore, based on Embodiment 1, the threaded connection structure includes a threaded opening 5 and a threaded ring 7. The threaded opening 5 is fixedly installed at the center of the bottom inside the bottle body 1, and the threaded ring 7 is fixedly connected to the center of the bottom outside the liner 3. The threaded ring 7 is threadedly connected to the liner 3. A retaining ring 8 is integrally connected to the outside of the liner 3 near the top, and a retaining opening 6 is provided at the top inside the bottle body 1. The retaining ring 8 is engaged with the retaining opening 6. An external thread is provided at the top outside of the liner 3, and the external thread is threadedly connected to the bottle cap 2.

[0026] Specifically, the bottle body 1 and the inner liner 3 are connected on one hand by a screw 5 and a threaded ring 7, and on the other hand by a snap 6 and a snap ring 8. The threaded structure can increase the overall strength of the bottle bottom, making it more stable when subjected to pressure or impact, reducing the risk of deformation or breakage. At the same time, the threaded design can distribute the pressure on the bottle bottom and avoid stress concentration, thereby improving the bottle's pressure resistance and making it suitable for packaging scenarios that require stacking or long-distance transportation.

[0027] It should be noted that this utility model is a double-layer injection-molded bottle with excellent pressure resistance. During use and packaging, the manufacturer puts the cosmetics into the inner liner 3, places the upper middle piece 4, and closes the bottle cap 2 before selling. When using, the bottle cap 2 is opened and the middle piece 4 is removed for use. During transportation or use, when the bottle body 1 is dropped, since the cosmetics are all contained in the inner liner 3, the bottom of the bottle body 1 is relatively heavy. When it falls freely, the bottom of the bottle body 1 will hit the ground first. When the impact force is generated, the threaded structure of the screw head 5 and the threaded ring 7 can increase the overall strength of the bottle bottom, making it more stable when subjected to pressure or impact, reducing the risk of deformation or breakage, and effectively improving safety.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A double-walled injection-molded bottle with excellent pressure resistance, comprising a bottle body (1), wherein the bottle body (1) is provided with an inner liner (3), and a bottle cap (2) is provided at the top outer position of the inner liner (3), and a middle piece (4) is placed at the top inner position of the inner liner (3), characterized in that: The bottle body (1) and the inner liner (3) are provided with a threaded connection structure.

2. The double-walled injection-molded bottle with excellent pressure resistance according to claim 1, characterized in that: The edge of the middle piece (4) is stepped, and a handle (9) is integrally connected to the top side of the middle piece (4).

3. A double-walled injection-molded bottle with excellent pressure resistance according to claim 1, characterized in that: The threaded connection structure includes a threaded opening (5) and a threaded ring (7). The threaded opening (5) is fixedly installed at the center of the bottom inside the bottle body (1), and the threaded ring (7) is fixedly connected at the center of the bottom outside the liner (3). The threaded ring (7) is threadedly connected to the liner (3).

4. A double-walled injection-molded bottle with excellent pressure resistance according to claim 1, characterized in that: The outer side of the liner (3) is integrally connected with a retaining ring (8) near the top, and the top of the inside of the bottle body (1) is provided with a slot (6), and the retaining ring (8) is engaged with the slot (6).

5. A double-walled injection-molded bottle with excellent pressure resistance according to claim 1, characterized in that: The liner (3) has an external thread at the top of its outer side, and the external thread is threaded to the bottle cap (2).

6. A double-walled injection-molded bottle with excellent pressure resistance according to claim 1, characterized in that: A sealing gasket is placed on the inside top of the bottle cap (2).

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