A cap with internal injection molding

Abstract

This utility model relates to the field of bottle cap technology. It discloses an internally injection-molded cap, comprising an inner cap and an outer cap. The inner cap is integrally molded at the center of the bottom of the outer cap. The bottom of the outer cap is concave, with internal threads located on the inner wall of the inner cap. A wave pattern is formed on the bottom of the inner cap. This utility model provides an internally injection-molded cap, manufactured using an internal injection molding process. The bottom of the inner cap serves as the gate location, and the wave pattern is formed on the bottom of the inner cap. The wave pattern is formed by three concentric rings radiating outwards. The three rings are designed to generate tension during injection molding, pulling the force on the outer surface inwards, thus supporting the surface and preventing shrinkage marks during cooling. This results in a smooth surface and solves problems related to easy subsequent painting and aesthetics.

Description

Technical Field

[0001] This utility model relates to the field of bottle cap technology, specifically to a cap with internal injection molding. Background Technology

[0002] Existing caps, such as the high-rigidity polymer water bottle cap based on inner and outer cap snap fastener disclosed in Chinese patent document CN222098446U, have an inner cap and an outer cap. The design of the inner and outer caps improves the sealing performance of the cap through a double sealing design. On the other hand, for example, some cosmetics on the market have a smaller bottle opening to control the flow of liquid. In this case, the inner cap is threaded to the bottle opening, while the outer cap provides a hand grip point for the user to easily unscrew the cap.

[0003] External injection molding is a process in injection molding where molten plastic flows from the outside of the part to the inside. The gate is usually located on the outside of the inner cap. A common defect of external injection molding is that it easily produces shrinkage marks on the surface of the cap. These shrinkage marks cause the surface of the cap to be uneven, affecting the uniformity and gloss of electroplating. This is detrimental to products with high appearance requirements, such as electroplated caps. Utility Model Content

[0004] To improve the above problems, this utility model discloses a cap with internal injection molding, including an inner cap and an outer cap. The inner cap is integrally molded at the center of the bottom of the outer cap. The bottom end of the outer cap is concave. The internal thread is located on the inner wall of the inner cap. The wave pattern is formed on the bottom of the inner cap.

[0005] Preferably, the wavy pattern is formed by at least three concentric rings of pattern spacing that radiate outwards from the inside.

[0006] Preferably, the outer wall of the inner cover has multiple reinforcing ribs distributed circumferentially.

[0007] Preferably, the inner wall of the outer cover has a bevel near the opening.

[0008] Preferably, the surface of the outer cover is coated.

[0009] Preferably, a visual opening prompt component is also installed inside the outer cover. The visual opening prompt component includes:

[0010] Observation ports: Two sets of observation ports are opened opposite each other on the side end of the outer cover near the cover opening;

[0011] A reservoir is filled into the observation port;

[0012] A liquid separator is located inside the liquid reservoir and divides the reservoir into two independent chambers. The two chambers are filled with a colorless liquid and a colored liquid, respectively, with the colored liquid positioned near the inner cover.

[0013] Plastic sealing film, which connects the inner and outer cap openings;

[0014] Two plastic elastic rods are installed opposite each other on the side end of the inner cover near the cover opening, with the ends of the plastic elastic rods away from the inner cover abutting against the plastic sealing film.

[0015] A pull rope connects the plastic elastic rod and the liquid separator.

[0016] Preferably, the observation port is filled with a transparent block.

[0017] Preferably, the sealing film forms a sealed cavity between the inner wall of the outer cover and the outer wall of the inner cover.

[0018] Preferably, the bottle is equipped with a breaker block for breaking the plastic seal.

[0019] Preferably, the reservoir body is made of a transparent material.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This utility model provides a cap with internal injection molding. Manufactured using this process, the inner bottom of the cap serves as the gate location. A wavy pattern is formed on the inner bottom of the cap, consisting of three concentric rings radiating outwards. These three rings are designed to generate tension during injection molding, pulling the outer surface inwards and preventing shrinkage marks during cooling. This results in a smooth surface and solves problems related to ease of subsequent painting and aesthetics. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a top view of the present invention;

[0024] Figure 2 This is a perspective view of the present utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the visual activation prompt component of this utility model. Figure 1 (The plastic sealant is intact);

[0026] Figure 4 This is a schematic diagram of the structure of the visual activation prompt component of this utility model. Figure 2(The plastic sealant is damaged);

[0027] Figure 5 This is a schematic diagram of the installation of the present invention and the bottle.

[0028] In the diagram: 10. Inner cover; 11. Outer cover; 12. Internal thread; 13. Wavy pattern; 14. Reinforcing rib; 15. Bevel; 17. Observation port; 18. Liquid reservoir; 19. Liquid separator; 20. Plastic sealing film; 21. Plastic elastic rod; 22. Pull cord. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] Example

[0031] The present invention will now be further described with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides an inner cover 10 and an outer cover 11. The inner cover 10 is integrally formed at the center of the bottom of the outer cover 11. The bottom end of the outer cover 11 is concave. The internal thread 12 is located on the inner wall of the inner cover 10. The wave pattern 13 is formed on the bottom of the inner cover 10.

[0033] The working principle and beneficial effects of the above technical solution are as follows:

[0034] This utility model discloses a cap with internal injection molding. Manufactured using this process, the bottom of the inner cap 10 serves as the gate location, while the wavy pattern 13 is formed on the bottom of the inner cap 10. The wavy pattern is formed by three concentric rings radiating outwards. The three rings are designed to generate tension during injection molding, pulling the outer surface inwards and thus preventing shrinkage marks during cooling. This results in a smooth surface and solves problems related to ease of subsequent painting and aesthetics.

[0035] In one embodiment, the wave pattern 13 is formed by at least three concentric wave intervals that radiate outwards from the inside.

[0036] In one embodiment, the outer wall of the inner cover 10 has a plurality of reinforcing ribs 14 distributed circumferentially.

[0037] The beneficial effects of the above technical solution are as follows:

[0038] The reinforcing rib 14 is set to fix the outer arc of the outer wall of the inner cover 10.

[0039] In one embodiment, the inner wall of the outer cover 11 is provided with a bevel 15 near the opening of the cover.

[0040] The beneficial effects of the above technical solution are as follows:

[0041] The bevel design allows the cap 11 to fit against the surface of the bottle body 23, thereby improving the seal.

[0042] In one embodiment, the surface of the outer cover 11 is provided with a coating.

[0043] like Figures 3 to 5 As shown, in one embodiment, a visual opening prompt component is also installed inside the outer cover 11. The visual opening prompt component includes:

[0044] Observation port 17, two sets of observation ports 17 are opened opposite each other on the side end of the outer cover 11 near the cover opening;

[0045] The reservoir 18 is filled into the observation port 17;

[0046] A liquid separator 19 is located inside the liquid storage bladder 18 and divides the liquid storage bladder 18 into two independent chambers. The two chambers are filled with a colorless liquid and a colored liquid, respectively, with the colored liquid positioned near the inner cover 10.

[0047] Plastic sealing film 20 is connected to the opening of the inner cover 10 and the outer cover 11;

[0048] Plastic elastic rods 21, two plastic elastic rods 21 are installed opposite each other on the side end of the inner cover 10 near the cover opening, and the end of the plastic elastic rod 21 away from the inner cover 10 abuts against the plastic sealing film 20;

[0049] Pull rope 22 is connected between plastic elastic rod 21 and liquid separator 19.

[0050] The bottle body 23 is equipped with a rupture block for breaking the plastic seal 20.

[0051] The working principle and beneficial effects of the above technical solution are as follows:

[0052] The plastic sealing film 20 ensures that the plastic elastic rod 21 is in a position as follows: Figure 3As shown in the tilted state, with the cap screwed onto the bottle neck, the internal thread 12 of the inner cap 10 screws into the external thread of the bottle neck. As the cap continues to screw in, until the plastic sealing film 20 is against the bottle body, the breaking block on the bottle body 23 breaks the plastic sealing film 20 during the cap screwing process, thus causing the plastic elastic rod 21 to abut against the bottle body 23. When the cap is turned counterclockwise to open the bottle neck, the plastic elastic rod 21 gradually loses the constraint of the bottle body 23. When the end of the plastic elastic rod 21 away from the inner cap 10 returns to a vertical state, the pull rope 22 pulls the liquid separator 19, thus connecting the two independent chambers separated by the liquid separator 19. After the colored liquid and colorless liquid mix together, the color change inside the liquid storage bladder 18 can be directly seen through the observation port 17, thus indicating that the cap has been opened.

[0053] In one embodiment, the observation port 17 is filled with a transparent block.

[0054] The beneficial effects of the above technical solution are as follows:

[0055] The transparent block allows for easy observation of the filling of the opening 17, ensuring the integrity of the surface of the outer cover 11.

[0056] In one embodiment, the sealing film 20 forms a sealed chamber between the outer cover 11 and the inner cover 10.

[0057] In one embodiment, the reservoir 18 is made of a transparent material.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A cap with internal injection molding, comprising an inner cap (10) and an outer cap (11), characterized in that, The inner cover (10) is integrally formed at the center of the bottom of the outer cover (11). The bottom of the outer cover (11) is recessed. The internal thread (12) is located on the inner wall of the inner cover (10). The wave pattern (13) is formed on the bottom of the inner cover (10).

2. The cap with internal injection molding according to claim 1, characterized in that, The wave pattern (13) is formed by at least three concentric rings of pattern that radiate outwards from the inside.

3. The cap with internal injection molding according to claim 1, characterized in that, The outer wall of the inner cover (10) has multiple reinforcing ribs (14) distributed circumferentially.

4. A cap with internal injection molding according to claim 1, characterized in that, The inner wall of the outer cover (11) is provided with a bevel (15) near the opening.

5. A cap with internal injection molding according to claim 1, characterized in that, The surface of the outer cover (11) is coated.

6. A cap with internal injection molding according to claim 1, characterized in that, The outer cover (11) also contains a visual opening prompt component, which includes: Observation port (17), two sets of observation ports (17) are opened opposite each other on the side end of the outer cover (11) near the cover opening; A reservoir (18) is filled into the observation port (17); Liquid separator (19) is located inside the liquid storage bladder (18) and divides the liquid storage bladder (18) into two independent chambers. The two chambers are filled with colorless liquid and colored liquid respectively, and the colored liquid is placed near the inner cover (10). A plastic sealing film (20) is connected to the opening of the inner cover (10) and the outer cover (11); Plastic elastic rods (21), two plastic elastic rods (21) are installed opposite each other on the side end of the inner cover (10) near the cover opening, and the end of the plastic elastic rod (21) away from the inner cover (10) abuts against the plastic sealing film (20); Pull rope (22) is connected between plastic elastic rod (21) and liquid separator (19).

7. A cap with internal injection molding according to claim 6, characterized in that, The observation port (17) is filled with a transparent block.

8. A cap with internal injection molding according to claim 1, characterized in that, The plastic sealant (20) forms a sealed cavity between the inner wall of the outer cover (11) and the outer wall of the inner cover (10).

9. A cap with internal injection molding according to claim 6, characterized in that, The bottle body (23) is equipped with a breaker block for breaking the plastic seal (20).

10. A cap with internal injection molding according to claim 6, characterized in that, The reservoir (18) is made of transparent material.

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