Plastic bottle cap sealing forming structure

Abstract

The utility model discloses a plastic bottle cap sealing and forming structure, which relates to the field of bottle cap forming technical equipment and comprises a flow guide pipe, an inner plug mechanism arranged at the top end of the flow guide pipe, a threaded core component arranged at the top end of the inner side of the inner plug mechanism, and an outer sealing component arranged at the top end of the outer side of the inner plug mechanism. A forming ring assembly matched with the inner plug mechanism is arranged at the bottom end of the outer side sealing assembly. The bottle cap opening device is scientific and novel in structure, the threaded core assembly is embedded in the top end of the inner plug mechanism, the inverted buckle design of the outer side sealing assembly and the arrangement of the first arc-shaped section and the second arc-shaped section are matched, the sealing performance of a bottle cap is enhanced, and it is guaranteed that the formed bottle cap has good opening performance; meanwhile, the bottle cap formed by using the plastic bottle cap sealing and forming structure has the advantages of firm sealing, leakage prevention and good impact resistance, is safe and convenient to use, can effectively prevent liquid in the bottle from being polluted by bacteria, and ensures that the packaged beverage package meets the hygienic standard requirement.

Description

Technical Field

[0001] The utility model relates to the field of bottle cap forming technology equipment, in particular to a plastic bottle cap sealing forming structure. Background Art

[0002] As consumers' living standards improve, their requirements for daily necessities are getting higher and higher. Bottled beverages suitable for drinking directly are gradually emerging. In this context, the design and manufacture of bottle caps are also facing new opportunities and challenges. Taking plastic bottle caps as an example, the sealing performance of bottle caps is the only indicator to verify the performance of plastic bottle caps. Although traditional plastic bottle caps can meet the basic needs of closure and carrying, in the process of sealing and forming plastic bottle caps, abnormal problems such as welding marks and air leakage of hot-filled plastic bottle caps are still a problem that plagues many beverage companies; the reason for the formation of welding marks at the inner plug is that when the mold is closed, the raw materials are wrapped and connected at the P point of the inner plug. Due to the high weight of the plastic bottle cap, the raw materials at the sealing position cannot be cooled in time, forming welding marks. Severe welding marks will form uneven steps at the inner plug, resulting in a decrease in the sealing performance of the inner plug and the product is prone to air leakage. Therefore, in order to solve the air leakage phenomenon, the sealing forming structure of the plastic bottle cap must be optimized and innovated accordingly.

[0003] For example, Chinese patent CN220032708U discloses a pressure adaptive cover for hot filling containers, including a pressure adaptive buckle cover, the pressure adaptive buckle cover is located between the outer cover and the inside of the hot filling container, the pressure adaptive buckle cover includes an inner buckle cylinder and a piston spacer, the inner buckle cylinder is inserted and has an interference fit with the mouth of the hot filling container, and it can be made of ordinary container materials, thereby greatly reducing the production cost of the hot filling container. However, the above-mentioned adaptive cover has the following shortcomings in the specific application process: first, the device lacks a cooling design for the inner plug of the bottle cap, which is easy to produce welding marks during the forming process, reducing the sealing of the bottle cap; secondly, the cover body formed by the device is a wrapping structure. When the bottle cap is hit by an external force, the plastic bottle cap cover surface will be deformed due to the impact of the impact force, affecting the sealing of the plastic bottle cap cover surface, making the liquid in the bottle easily deteriorate or leak, and the practical effect is not good.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a plastic bottle cap sealing and forming structure to overcome the above technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A plastic bottle cap sealing and forming structure comprises a guide tube, the top of which is provided with an inner plug mechanism, the inner top of which is provided with a threaded core assembly, the outer top of which is provided with an outer sealing assembly, and the bottom of which is provided with a forming ring assembly matched with the inner plug mechanism.

[0008] Furthermore, in order to achieve the goal of increasing the impact resistance of the sealed bottle cap and avoid the risk of crooked cap caused by the instantaneous impact force generated by the bottle mouth when the bottle mouth is screwed into the inner plug and the outer seal of the bottle cap, the inner plug mechanism includes a first cavity arranged at the top of the guide tube, a second cavity is arranged at the top of the first cavity, a snap ring assembly matching with the threaded core assembly is arranged at the inner bottom end of the second cavity, a first arc portion is arranged at the top of the second cavity, a plurality of mold holes are opened at the top of the first arc portion, a plurality of first arc segments are arranged at the outer bottom of the second cavity, a plurality of second arc segments are arranged at the outer top of the second cavity, the snap ring assembly includes a mounting ring arranged at the inner bottom end of the second cavity, a plurality of arc grooves are opened at one end of the mounting ring, and limit blocks matching with the threaded core assembly are symmetrically arranged at the inner middle part of the arc groove.

[0009] Furthermore, in order to increase the cooling performance of the bottle cap molding structure and reduce the severity of the weld mark, the threaded core assembly includes a clamping sleeve arranged at the top inner side of the inner plug mechanism, a sealing ring is arranged at the bottom end of the clamping sleeve, a plurality of clamping blocks cooperating with the clamping ring assembly are arranged at the bottom end of the sealing ring, and a second arc portion is arranged at the top end of the clamping sleeve.

[0010] Furthermore, in order to achieve sufficient sealing effect and provide moderate opening torque, the outer sealing assembly includes an inverted cavity arranged at the top end of the outer side of the inner plug mechanism, a plurality of reinforcing ribs are arranged on the inner side of the inverted cavity, and a side sealing cover is arranged at the top end of the inverted cavity.

[0011] Furthermore, in order to cooperate with the threaded core assembly to achieve the sealing and forming of the bottle cap, the molding ring assembly includes a sealing ring arranged at the bottom end of the outer sealing assembly, a plurality of sealing ribs are arranged at the top end of the sealing ring, expansion holes are arranged between the sealing ribs, and a snap-in groove is opened at the bottom end of the sealing ring.

[0012] The beneficial effects of the utility model are:

[0013] 1. The structure of the utility model is scientific and novel. By embedding a threaded core component at the top of the inner plug mechanism, the undercut design of the outer sealing component and the arrangement of the first arc segment and the second arc segment enhance the sealing performance of the bottle cap, ensuring that the formed bottle cap has good opening performance. At the same time, the bottle cap formed by such sealing has the advantages of firm sealing, good leakage prevention and impact resistance, is safe and convenient to use, can effectively prevent the liquid in the bottle from being contaminated by bacteria, and ensure that the encapsulated beverage packaging meets the requirements of hygiene standards.

[0014] 2. By setting up the inner plug mechanism and the threaded core assembly, the top end of the threaded core assembly and the inner plug mechanism are matched, and the good thermal conductivity of beryllium copper is used to increase the cooling performance of the bottle cap molding structure and reduce the severity of the welding mark; at the same time, the first arc segment and the second arc segment are provided on the outside of the second cavity, which increases the impact resistance of the sealed bottle cap, avoids the risk of crooked cap caused by the instantaneous impact force generated by the bottle mouth when the bottle mouth is screwed into the inner plug and the outer seal of the bottle cap, and improves the flatness of the cover surface of the plastic bottle cap.

[0015] 3. By setting up an outer sealing component and a forming ring component, the outer side of the bottle cap is pressed by the inverted cavity, and the outer side sealing is achieved in cooperation with the inner plug mechanism. At the same time, the sealing ring is connected to the second cavity of the inner plug mechanism to ensure the sealing of the plastic bottle cap during the forming process. The clamping groove adopts a trapezoidal structure to facilitate the demoulding of the bottle cap; in addition, the reinforcing ribs increase the rigidity of the outer sealing component, which is not easy to deform when subjected to force, and enables the formed bottle cap to have a moderate opening torque. The side sealing cap closes the top of the bottle mouth to form a final seal on the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a plastic bottle cap sealing and forming structure according to an embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of another angle of a plastic bottle cap sealing and forming structure according to an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of an inner plug mechanism in a sealing and forming structure of a plastic bottle cap according to an embodiment of the utility model;

[0020] Figure 4 yes Figure 1 A partial enlarged view of the middle A;

[0021] Figure 5 It is a structural schematic diagram of a threaded core assembly in a plastic bottle cap sealing and forming structure according to an embodiment of the utility model;

[0022] Figure 6 It is a partial structural schematic diagram of a molding ring assembly in a plastic bottle cap sealing molding structure according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Flow guide tube; 2. Inner plug mechanism; 201. First cavity; 202. Second cavity; 203. Snap ring assembly; 2031. Mounting ring; 2032. Arc-shaped snap groove; 2033. Limit block; 204. First arc-shaped portion; 205. Mold hole; 206. First arc-shaped segment; 207. Second arc-shaped segment; 3. Threaded core assembly; 301. Snap sleeve; 302. Sealing ring; 303. Snap block; 304. Second arc-shaped portion; 4. External sealing assembly; 401. Inverted cavity; 402. Reinforcing rib; 403. Side sealing top cover; 5. Forming ring assembly; 501. Sealing ring; 502. Sealing rib; 503. Expansion hole; 504. Snap groove; 6. Bottle cap. DETAILED DESCRIPTION

[0025] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] According to an embodiment of the utility model, a plastic bottle cap sealing and forming structure is provided.

[0027] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 6 As shown, the sealing and forming structure of the plastic bottle cap according to the embodiment of the utility model includes a guide tube 1, characterized in that an inner plug mechanism 2 is arranged at the top end of the guide tube 1, a threaded core component 3 is arranged at the inner top end of the inner plug mechanism 2 (in addition, in specific applications, the threaded core component 3 is made of beryllium copper), an outer sealing component 4 is arranged at the outer top end of the inner plug mechanism 2, and a molding ring component 5 matching the inner plug mechanism 2 is arranged at the bottom end of the outer sealing component 4.

[0028] With the aid of the above-mentioned technical scheme of the utility model, the structure of the utility model is scientific and novel. By embedding the threaded core component 3 at the top of the inner plug mechanism 2, the undercut design of the outer sealing component 4 and the arrangement of the first arc segment 206 and the second arc segment 207 enhance the sealing performance of the bottle cap, thereby ensuring that the formed bottle cap has good opening performance. At the same time, the bottle cap formed by the sealing of the structure has the advantages of firm sealing, good leakage prevention and impact resistance, is safe and convenient to use, can effectively prevent the liquid in the bottle from being contaminated by bacteria, and ensure that the encapsulated beverage packaging meets the requirements of hygiene standards.

[0029] In one embodiment, for the above-mentioned inner plug mechanism 2 and the threaded core assembly 3, the inner plug mechanism 2 includes a first cavity 201 arranged at the top of the guide tube 1, a second cavity 202 is arranged at the top of the first cavity 201, a clamping ring assembly 203 matching with the threaded core assembly 3 is arranged at the inner bottom of the second cavity 202, a first arc-shaped portion 204 is arranged at the top of the second cavity 202, a plurality of mold holes 205 are opened at the top of the first arc-shaped portion 204, a plurality of first arc segments 206 are arranged at the outer bottom of the second cavity 202, a plurality of second arc segments 207 are arranged at the outer top of the second cavity 202, and the clamping ring assembly 203 includes a A mounting ring 2031 is arranged at the inner bottom end of the second cavity 202, and one end of the mounting ring 2031 is provided with a plurality of arc-shaped grooves 2032, and a limit block 2033 cooperating with the threaded core assembly 3 is symmetrically arranged in the inner middle part of the arc-shaped groove 2032; the threaded core assembly 3 includes a clamping sleeve 301 arranged at the inner top end of the inner plug mechanism 2, a sealing ring 302 is arranged at the bottom end of the clamping sleeve 301, and a plurality of clamping blocks 303 cooperating with the clamping ring assembly 203 are arranged at the bottom end of the sealing ring 302, and a second arc-shaped portion 304 is arranged at the top end of the clamping sleeve 301, thereby achieving the goal of increasing the cooling performance of the bottle cap molding structure and reducing the severity of the welding mark.

[0030] The working principle of the inner plug mechanism 2 and the threaded core assembly 3 is as follows: the first cavity 201 is used as the mounting base of the entire inner plug mechanism, which is sleeved on the top of the guide tube 1, and the second cavity 202 is used as the main body of the threaded core assembly 3, wherein the clamping ring assembly 203 is fixed to the inner side of the second cavity 202 through the mounting ring 2031, and the mounting ring 2031 cooperates with the clamping block 303 in the threaded core assembly 3 through the limit block 2033 in the arc-shaped slot 2032 to adjust the position of the sealing ring 302. The top of the second cavity 202 is provided with a first arc portion 204, which together with the second arc portion 304 at the top of the clamping sleeve 301 constitutes a molding cavity on the inner side of the bottle cap; at the same time, the outer side of the second cavity 202 is provided with a first arc segment 206 and a second arc segment 207, which are used to position and fix the bottle cap. When the bottle mouth is screwed into the space between the inner plug and the outer seal of the bottle cap, the increase in the force strength of the bottle cap surface caused by the instantaneous impact force of the bottle mouth is avoided, the risk of high deflection of the cap is reduced, and the flatness of the plastic bottle cap surface is improved.

[0031] In one embodiment, for the above-mentioned outer sealing component 4 and the forming ring component 5, the outer sealing component 4 includes an inverted cavity 401 arranged at the outer top end of the inner plug mechanism 2, a plurality of reinforcing ribs 402 are arranged on the inner side of the inverted cavity 401, and a side sealing top cover 403 is arranged at the top of the inverted cavity 401; the forming ring component 5 includes a sealing ring 501 arranged at the bottom end of the outer sealing component 4, a plurality of sealing ribs 502 are arranged on the top end of the sealing ring 501, expansion holes 503 are arranged between the sealing ribs 502, and a snap-in groove 504 is opened at the bottom end of the sealing ring 501 (in addition, in specific applications, the cross-section of the snap-in groove 504 is set as a trapezoidal structure), so as to play a sufficient sealing role, realize the sealing forming of the bottle cap, and enable the formed bottle cap to provide a moderate opening torque.

[0032] The working principle of the outer sealing component 4 and the forming ring component 5 is as follows: first, the undercut cavity 401 is the main part of the outer sealing component 4, and the undercut is set at the outer top end of the inner plug mechanism 2, which is used to wrap and press the outer side of the bottle cap during sealing and molding. A number of reinforcing ribs 402 are evenly distributed on the inner wall of the undercut cavity 401, which play a role in strengthening the rigidity of the undercut cavity structure, so that it is not easy to deform when subjected to force. At the same time, the reinforcing ribs enable the formed bottle cap to provide a moderate opening torque. The side sealing top cover 403 is set at the top of the undercut cavity 401. The sealing part contacts the topmost part of the outer side of the bottleneck during the sealing molding process to form the final closure of the outer side of the bottle mouth; secondly, the sealing ring 501, as the basic part of the molding ring assembly, is arranged at the bottom end of the outer sealing assembly 4, and is used to be fixedly connected with the second cavity 202 on the outer side of the inner plug mechanism 2 to ensure the sealing of the outer sealing assembly 4. The expansion hole 503 is located between adjacent sealing ribs 502 and can be used as a pressure release port during injection molding or in-mold molding. The snap-in groove 504 is opened at the bottom end of the sealing ring 501 to facilitate the demoulding of the bottle cap.

[0033] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0034] In actual application, the molten raw material flows into the inner plug mechanism 2 from the guide tube 1, and the inner plug mechanism 2 and the outer sealing component 4 form a bottle cap forming cavity (the working principle of the inner plug mechanism 2 is as described above), ensuring the sealing forming of the plastic bottle cap, and the threaded core component 3 is embedded in the top of the inner plug mechanism 2, so as to increase the cooling performance of the bottle cap molding structure and reduce the severity of the welding mark (the working principle of the threaded core component 3 is as described above), and the molding ring component 5 cooperates with the outer sealing component 4 to complete the positioning, so as to ensure the sealing during the molding process (the working principles of the outer sealing component 4 and the molding ring component 5 are as described above). With the cooperation of the first arc segment 206, the second arc segment 207 and the reinforcing rib 402, the formed bottle cap can provide a moderate opening torque, and avoid the stress fatigue of the bottle cap surface caused by the instantaneous impact force generated by the bottle mouth being screwed in, thereby reducing the risk of high deflection of the cap and improving the flatness of the plastic bottle cap surface.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic bottle cap sealing and forming structure, comprising a flow guide tube (1), characterized in that: The top end of the flow guide tube (1) is provided with an inner plug mechanism (2), the inner top end of the inner plug mechanism (2) is provided with a threaded core assembly (3), the outer top end of the inner plug mechanism (2) is provided with an outer sealing assembly (4), and the bottom end of the outer sealing assembly (4) is provided with a forming ring assembly (5) that matches the inner plug mechanism (2).

2. A plastic bottle cap sealing and forming structure according to claim 1, characterized in that: The inner plug mechanism (2) comprises a first cavity (201) arranged at the top end of the flow guide tube (1); a second cavity (202) is arranged at the top end of the first cavity (201); and a clamping ring assembly (203) matching the threaded core assembly (3) is arranged at the inner bottom end of the second cavity (202).

3. A plastic bottle cap sealing and forming structure according to claim 2, characterized in that: A first arc-shaped portion (204) is provided at the top of the second cavity (202), a plurality of mold closing holes (205) are provided at the top of the first arc-shaped portion (204), a plurality of first arc-shaped segments (206) are provided at the outer bottom of the second cavity (202), and a plurality of second arc-shaped segments (207) are provided at the outer top of the second cavity (202).

4. A plastic bottle cap sealing and forming structure according to claim 3, characterized in that: The snap ring assembly (203) comprises a mounting ring (2031) arranged at the bottom end of the inner side of the second cavity (202); one end of the mounting ring (2031) is provided with a plurality of arc-shaped slots (2032); and a limit block (2033) cooperating with the threaded core assembly (3) is symmetrically arranged in the middle of the inner side of the arc-shaped slots (2032).

5. A plastic bottle cap sealing and forming structure according to claim 4, characterized in that: The threaded core assembly (3) comprises a clamping sleeve (301) arranged at the top inner side of the inner plug mechanism (2); a sealing ring (302) is arranged at the bottom end of the clamping sleeve (301); a plurality of clamping blocks (303) cooperating with the clamping ring assembly (203) are arranged at the bottom end of the sealing ring (302); and a second arc-shaped portion (304) is arranged at the top end of the clamping sleeve (301).

6. A plastic bottle cap sealing and forming structure according to claim 1, characterized in that: The outer sealing assembly (4) comprises an undercut cavity (401) arranged at the outer top end of the inner plug mechanism (2), a plurality of reinforcing ribs (402) are arranged on the inner side of the undercut cavity (401), and a side sealing cover (403) is arranged at the top end of the undercut cavity (401).

7. A plastic bottle cap sealing and forming structure according to claim 6, characterized in that: The forming ring assembly (5) comprises a sealing ring (501) arranged at the bottom end of the outer sealing assembly (4), a plurality of sealing ribs (502) are arranged at the top end of the sealing ring (501), expansion holes (503) are arranged between the sealing ribs (502), and a clamping groove (504) is opened at the bottom end of the sealing ring (501).

Images