Rubber-coated injection molding bottle cap capable of solving product surface shrinkage

Abstract

The utility model discloses a rubber coating injection molding bottle cap for solving product surface shrinkage, which comprises an outer cap and an inner cap, both the outer cap and the inner cap are of a cylindrical structure with one closed end, the inner cap is arranged in the outer cap, and the outer cap is connected with the inner cap at the open end; the outer cover is provided with at least one annular protruding strip protruding outwards, a cavity corresponding to the annular protruding strip is formed in the outer cover, a rubber coating inner piece is arranged in the cavity and is an annular ring, and the inner side of the rubber coating inner piece is tightly attached to the outer side of the inner cover. The utility model can not only solve the problem of product surface shrinkage, but also simplify the product structure and reduce the manufacturing and mounting cost.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle cap structures, in particular to a double-shot injection molding bottle cap for solving surface shrinkage of products. Background Technique

[0002] In the prior art, some bottle caps are composed of several parts, including an upper cover, a lower cover, an inner cover, etc. After each component is produced separately, they are assembled into a complete bottle cap. In some cases, the upper cover needs to be provided with an outwardly protruding annular rib. One is to facilitate grasping by hand, and the other is to create an aesthetically pleasing shape. However, since most of the bottle cap components are now plastic parts produced by injection molding, the thickness at the annular rib increases, and shrinkage is likely to occur on the surface during injection molding, and ripples are likely to appear on the surface. The existing solution is to make the wall thickness at the annular rib of the upper cover the same as that at other places, and add a weight block inside the annular rib, and then snap the lower cover onto the upper cover and connect the lower cover to the inner cover. Although this can solve the shrinkage problem, it increases the cost in production and installation. In addition, there will be a seam at the connection between the upper cover and the lower cover, which affects the appearance. Content of the Utility Model

[0003] The purpose of the utility model is to provide a double-shot injection molding bottle cap for solving surface shrinkage of products, which can not only solve the surface shrinkage problem of products but also simplify the product structure and reduce the production and installation costs.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A double-shot injection molding bottle cap for solving surface shrinkage of products, including an outer cover and an inner cover. Both the outer cover and the inner cover are cylindrical structures with one end closed. The inner cover is arranged inside the outer cover, and the outer cover and the inner cover are connected at the open end. The outer cover is provided with at least one outwardly protruding annular rib. A cavity corresponding to the annular rib is formed inside the outer cover, and a double-shot inner part is arranged in the cavity. The double-shot inner part is an annular ring, and the inner side of the double-shot inner part is closely attached to the outer side of the inner cover.

[0006] In this solution, the original upper cover and lower cover are combined into an integrated outer cover. The outer cover is provided with an outwardly protruding annular rib, and a double-shot inner part is arranged in the hollow part inside the rib. The outer cover and the inner cover are connected at the open end. The specific production process is as follows: First, produce the injection molded double-shot inner part. After completion, embed the double-shot inner part product into the outer cover injection mold, and then complete the injection molding of the outer cover. In this way, the wall thickness of the outer cover can be made uniform, and there is no shrinkage or ripple on the surface. Since the surface treatment only needs to be carried out once after the original upper cover and lower cover are combined into one outer cover component, the surface treatment speed is fast and the overall cost is low. At the same time, the double-shot component is also fixed to the outer cover as a whole. Finally, during installation, connect the outer cover and the inner cover. The number of accessories is relatively less in the whole process, and the assembly is also simple. The outer cover becomes a one-piece component, and there is no longer a seam between the upper cover and the lower cover. The overall appearance of the bottle cap is beautiful without seams.

[0007] As a preferred embodiment of the present utility model, a slot ring with an upward opening is provided at the open end of the inner cover, and a pin ring cooperating with the slot ring is provided at the bottom of the outer cover. The inner cover and the outer cover in this solution adopt a tightly fitting plug-in connection method, which is relatively simple to install. Either automated assembly or manual assembly can be used, and the connection firmness between the inner cover and the outer cover is also sufficient for the required use.

[0008] As a preferred embodiment of the present utility model, a ring-shaped rib protruding outward is provided near the closed end of the outer cover. At least one ring-shaped stop tooth or ring-shaped stop groove is provided on the inner wall of the ring-shaped rib, and a groove or rib cooperating with the ring-shaped stop tooth or ring-shaped stop groove is provided on the outer ring surface of the rubber-coated inner part. The cooperation between the ring-shaped stop tooth and the ring-shaped stop groove in this solution can fix the rubber-coated inner part and the outer cover together. For example, when the rubber-coated inner part is injection-molded, a groove is reserved on the outside. Then, when the rubber-coated inner part is placed in the injection mold of the outer cover for injection molding, the outer cover material automatically enters the reserved groove of the rubber-coated inner part to form the cooperation of the stop tooth and the stop groove.

[0009] As a preferred embodiment of the present utility model, the cross-section of the ring-shaped rib is trapezoidal. The cross-section of the ring-shaped rib in this solution can be structures such as semi-circular, semi-elliptical, semi-polygonal, etc. Adopting a trapezoidal cross-section can provide a relatively suitable grasping surface for the user.

[0010] As a preferred embodiment of the present utility model, a plurality of anti-slip annular grooves are provided on the surface of the inner cover in contact with the rubber-coated inner part. The anti-slip annular grooves in this solution slightly protrude from the surface of the inner cover. Utilizing the elasticity of the rubber-coated inner part, when the outer cover and the inner cover are plugged together, the anti-slip annular grooves can increase the friction between the inner cover and the rubber-coated inner part, and the rubber-coated inner part is fixedly connected to the outer cover, so it is difficult for the outer cover to be separated from the inner cover.

[0011] As a preferred embodiment of the present utility model, the inner side surface of the closed end of the outer cover is in close contact with the outer side surface of the closed end of the inner cover, and protruding patterns or characters are provided on the outer side surface of the closed end of the outer cover. The outer cover and the inner cover in this solution are in close contact, and the connection strength is the strongest. Exhaust holes can be appropriately provided on the outer side surface of the closed end of the outer cover to prevent the air between the inner side surface of the closed end of the outer cover and the outer side surface of the closed end of the inner cover from being difficult to discharge. Protruding patterns or characters of trademarks are provided on the outer side surface of the closed end of the outer cover to highlight the product features.

[0012] Compared with the prior art, the beneficial effects of the present utility model are: it can solve the surface shrinkage problem of the product and simplify the product structure, reducing the manufacturing and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the external shape structure of the present utility model;

[0014] Figure 2This is a schematic cross-sectional structure diagram of the present utility model.

[0015] In the figure: 1. Outer cover; 2. Inner cover; 3. Rubber-coated inner part

[0016] 11. Annular rib; 12. Pin ring; 13. Stopping tooth

[0017] 14. Convex pattern; 21. Slot ring; 22. Anti-slip ring pattern

[0018] 31. Groove Specific embodiments

[0019] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] Please refer to Figure 1-2 , the present utility model provides a technical solution:

[0023] A rubber-coated injection-molded bottle cap for solving the surface shrinkage of products, comprising an outer cover 1 and an inner cover 2. Both the outer cover 1 and the inner cover 2 are cylindrical structures with one end closed. The inner cover 2 is arranged inside the outer cover 1, and the outer cover 1 and the inner cover 2 are connected at the open end. The outer cover 1 is provided with at least one annular rib 11 protruding outward. A cavity corresponding to the annular rib 11 is formed inside the outer cover 1. A rubber-coated inner part 3 is arranged in the cavity. The rubber-coated inner part 3 is an annular ring, and the inner side of the rubber-coated inner part 3 is closely attached to the outer side of the inner cover 2.

[0024] The open end of the inner cover 2 is provided with a slot ring 21 with an upward opening, and the bottom of the outer cover 1 is provided with a pin ring 12 that cooperates with the slot ring 21.

[0025] An annular rib 11 protruding outward is provided near the closed end of the outer cover 1. At least one annular stop tooth 13 or annular stop groove is provided on the inner wall of the annular rib 11. A groove 31 or a rib matching with the annular stop tooth 13 or the annular stop groove is provided on the outer ring surface of the rubber-coated inner part 3.

[0026] The cross section of the annular rib 11 is trapezoidal.

[0027] Multiple anti-slip annular patterns 22 are provided on the surface of the inner cover 2 that is in close contact with the rubber-coated inner part 3.

[0028] The inner side surface of the closed end of the outer cover 1 is in close contact with the outer side surface of the closed end of the inner cover 2. Convex patterns 14 or words are provided on the outer side surface of the closed end of the outer cover 1.

[0029] The working process of the present utility model is as follows: First, the injection-molded rubber-coated inner part 3 is manufactured. After completion, the rubber-coated inner part 3 product is embedded in the injection mold of the outer cover 1, and then the injection molding of the outer cover 1 is completed. In this way, the wall thickness of the outer cover 1 can be made uniform, and there is no shrinkage or ripple on the surface. Since the original upper cover and lower cover are combined into one outer cover component, the surface treatment only needs to be carried out once, so the surface treatment speed is fast and the overall cost is low. At the same time, the rubber-coated component 3 is also fixed to the outer cover 1 as a whole. Finally, when installing, the outer cover 1 and the inner cover 2 are connected. The number of accessories is relatively small compared with the existing ones, and the assembly is also simple. The outer cover 1 becomes a one-piece component, and there is no longer a joint between the upper cover and the lower cover. The overall appearance of the bottle cap is beautiful without seams.

[0030] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A plastic-coated injection-molded bottle cap for solving the problem of product surface shrinkage, comprising an outer cap and an inner cap, characterized in that: The outer cover and the inner cover are both cylindrical structures with one end closed, the inner cover is arranged inside the outer cover, and the outer cover and the inner cover are connected at the open end; The outer cover is provided with at least one annular convex strip protruding outward, a cavity corresponding to the annular convex strip is formed in the outer cover, a rubber-coated inner part is provided in the cavity, the rubber-coated inner part is an annular ring, and the inner side of the rubber-coated inner part is tightly attached to the outer side of the inner cover.

2. The overmolded injection-molded bottle cap for solving the problem of product surface shrinkage according to claim 1, characterized in that: The inner cover opening end is provided with a slot ring opening upward, and the outer cover bottom is provided with a pin ring matching with the slot ring.

3. The overmolded injection-molded bottle cap for solving the problem of product surface shrinkage according to claim 1, characterized in that: The outer cover is provided with an outwardly protruding annular convex strip near the closed end, the inner wall of the annular convex strip is provided with at least one annular stop tooth or annular stop groove, and the outer ring surface of the rubber-coated inner part is provided with a groove or convex strip that cooperates with the annular stop tooth or annular stop groove.

4. The overmolded injection-molded bottle cap for solving the problem of product surface shrinkage according to claim 3, characterized in that: The cross section of the annular convex strip is trapezoidal.

5. The overmolded injection-molded bottle cap for solving the problem of product surface shrinkage according to claim 1, characterized in that: The surface where the inner cover and the rubber-coated inner part are in close contact is provided with a plurality of anti-slip ring patterns.

6. The overmolded injection-molded bottle cap for solving the problem of product surface shrinkage according to claim 1, characterized in that: The inner side surface of the closed end of the outer cover is tightly attached to the outer side surface of the closed end of the inner cover, and the outer side surface of the closed end of the outer cover is provided with convex patterns or words.

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