Plastic bottle mouth sealing cover and molding method thereof

Abstract

The present invention discloses a plastic bottle mouth packaging cover that is easy to print patterns on, comprising a plastic inner cover, the plastic inner cover comprising a main body and an anti-counterfeiting ring arranged up and down, the lower end of the main body being connected to the anti-counterfeiting ring, and forming a connection along the circumferential direction; and a metal outer cover; the metal outer cover is sleeved on the outer surface of the main body and connected through a connector; the lower end of the metal outer cover is located above the connection. The packaging cover not only has good adaptability to the plastic bottle mouth and stable connection, but also the pattern printed on the outer surface of the packaging cover has the advantages of exquisiteness, firm coloring and fidelity, and is suitable for the packaging of personalized and mid-to-high-end products. A molding method for a plastic bottle mouth packaging cover is also provided.

Description

Technical Field

[0001] The invention relates to a packaging product, in particular to a plastic bottle mouth packaging cover and a molding method thereof. Background Art

[0002] Generally, the cover installed on the plastic bottle mouth 13 is made of plastic. Figure 1 As shown, the outer circumference of the plastic bottle mouth 13 is provided with a bottle mouth external thread 14, a boss 15 and a ring plate 16, and the bottle mouth external thread 14, the boss 15 and the ring plate 16 are arranged in sequence from top to bottom. The plastic cover includes a main body 2 and an anti-counterfeiting ring 3 arranged up and down, and the lower end of the main body 2 is connected to the anti-counterfeiting ring 3, and a connection 4 is formed along the circumferential direction. The inner wall of the main body 2 is provided with a cover external thread 18, and the main body 2 and the plastic bottle mouth 13 are tightened by the cooperation of the bottle mouth external thread 14 and the cover external thread 18. An anti-counterfeiting strip 17 is provided between the anti-counterfeiting ring 3 and the outer wall of the plastic bottle mouth 13, and the upper end of the anti-counterfeiting strip 17 is pressed against the lower surface of the boss 15, and the lower end of the anti-counterfeiting strip 17 is connected to the inner wall of the anti-counterfeiting ring 3. The main body 2 is rotated, the connection 4 is disconnected, the main body 2 is unscrewed from the plastic bottle mouth 13, and the anti-counterfeiting ring 3 and the anti-counterfeiting strip 17 remain on the plastic bottle mouth 13.

[0003] The plastic cover has good adaptability to the plastic bottle mouth 13 and has good versatility. Since the outer surface of the plastic cover has less adhesion to the ink, the pattern printed on the outer surface of the plastic cover has the disadvantages of being rough, not being color-fast and being easily distorted. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a plastic bottle mouth packaging cover which is easy to print patterns and a molding method thereof.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a plastic bottle mouth sealing cover, comprising a plastic inner cover, the plastic inner cover comprising a main body and an anti-counterfeiting ring arranged up and down, the lower end of the main body is connected to the anti-counterfeiting ring, and a connection is formed along the circumferential direction; and also comprising a metal outer cover;

[0006] The metal outer cover is sleeved on the outer surface of the main body and connected via a connecting piece;

[0007] The lower end of the metal outer cover is located above the connection.

[0008] Furthermore, the connecting member includes a convex rib and a mounting groove that are connected to each other, and the shape of the convex rib is adapted to the shape of the mounting groove;

[0009] A plurality of the convex ribs are arranged at intervals along the outer circumference of the main body; and a plurality of the mounting grooves are arranged at intervals along the circumference of the metal outer cover.

[0010] Furthermore, the connecting member includes a mounting groove and a convex rib of an annular structure that are connected to each other, and the shape of the convex rib is adapted to the shape of the mounting groove;

[0011] The outer surface of the convex rib is provided with a protrusion;

[0012] A clamping space is provided on the side wall of the mounting groove adjacent to the protrusion, and the protrusion is clamped in the clamping space.

[0013] Furthermore, the plurality of protrusions are evenly distributed on the upper surface of the convex rib.

[0014] Furthermore, the rib and the protrusion are integrally formed, and the mounting groove and the metal outer cover are integrally formed.

[0015] Furthermore, an anti-slip portion is provided on the outer periphery of the metal outer cover.

[0016] Furthermore, the metal outer cover is made of aluminum alloy.

[0017] The method for forming a plastic bottle mouth sealing cover comprises the following steps:

[0018] The metal outer cover is pressed onto the outer surface of the plastic inner cover body by a press-fitting device, and the two are connected by a connecting piece to form an integral structure.

[0019] Further, the steps include:

[0020] A. Press the upper part of the metal cover onto the upper part of the main body;

[0021] B. The outer periphery of the main body is provided with an annular convex rib, which is arranged close to the connection;

[0022] The side wall of the metal outer cover is pressed onto the upper surface of the convex rib to form a clamping portion; the lower end of the metal outer cover extends to below the lower surface of the convex rib to form an extension portion;

[0023] C. Press the extension part onto the lower surface of the rib to form a curled edge.

[0024] Furthermore, before step C, the method further includes step D, of making a cut along the circumferential direction of the inner surface of the side wall of the metal outer cover, wherein the cut is located in the extension portion and close to the lower surface of the rib.

[0025] Furthermore, before step A, the cuts are formed by rolling.

[0026] Compared with the prior art, the invention has the following beneficial effects: the invention provides a plastic bottle mouth sealing cap that is easy to print patterns on. The sealing cap not only has good adaptability to the plastic bottle mouth and stable connection, but also has the advantages of exquisiteness, firm coloring and fidelity on the outer surface of the sealing cap, and is suitable for the packaging of personalized and mid-to-high-end products. A molding method of the plastic bottle mouth sealing cap is also provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a structural schematic diagram of an existing plastic cover;

[0028] Figure 2 It is a schematic diagram of the structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the metal outer cover of the present invention being molded and installed;

[0030] Figure 4 It is a schematic diagram of the structure in which the extension part of the present invention is pressed by the lower mold;

[0031] Figure 5 It is a schematic diagram of the structure of the present invention being press-assembled by the upper die and the lower die;

[0032] Figure 6 It is a structural diagram of the upper die;

[0033] Figure 7 It is a structural diagram of the lower die;

[0034] Figure markings: 1-plastic inner cover; 2-main body; 3-anti-counterfeiting ring; 4-connecting point; 5-metal outer cover; 6-convex rib; 7-mounting groove; 8-extension part; 9-anti-slip part; 10-cut mark; 11-upper mold; 1101-press-fitting protrusion; 12-lower mold; 13-plastic bottle mouth; 14-external thread of bottle mouth; 15-boss; 16-ring plate; 17-anti-counterfeiting strip; 18-external thread of cover body. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] A plastic bottle mouth sealing cap comprises a plastic inner cap 1, wherein the plastic inner cap 1 comprises a main body 2 and an anti-counterfeiting ring 3 arranged up and down, wherein the lower end of the main body 2 is connected to the anti-counterfeiting ring 3 and a connection 4 is formed along the circumferential direction; and further comprises a metal outer cap 5; the metal outer cap 5 is sleeved on the outer surface of the main body 2 and is connected via a connecting piece; and the lower end of the metal outer cap 5 is located above the connection 4.

[0037] The metal outer cover 5 is connected to the main body 2 of the plastic inner cover 1 by a connector to form a cover assembly. The connector has a variety of specific implementations, and the connector can be a viscose product. When the user rotates the cover assembly, the connection 4 is disconnected, and the cover assembly is further rotated to separate the cover assembly from the plastic bottle mouth 13. The lower end of the metal outer cover 5 does not interfere with the disconnection of the connection 4. The plastic inner cover 1 has good adaptability and stable connection with the plastic bottle mouth 13. Compared with the outer surface of the plastic cover, the pattern printed on the outer surface of the metal outer cover 5 has the advantages of exquisiteness, firm coloring and fidelity, which is suitable for the packaging of personalized and mid-to-high-end products.

[0038] Preferably, the connector includes a convex rib 6 and a mounting groove 7 that are connected to each other, and the shape of the convex rib 6 matches the shape of the mounting groove 7; a plurality of the convex ribs 6 are arranged at intervals along the outer circumference of the main body 2; and a plurality of the mounting grooves 7 are arranged at intervals along the circumference of the metal outer cover 5. The shape of the convex rib 6 matches the shape of the mounting groove 7, which means that the convex rib 6 is slightly smaller than the mounting groove 7, and the convex rib 6 is connected to the mounting groove 7. The side wall of the mounting groove 7 prevents the convex rib 6 from being displaced along the circumference of the main body 2, thereby preventing the main body 2 and the metal outer cover 5 from rotating.

[0039] Preferably, the connector includes a mounting groove 7 and a convex rib 6 of an annular structure that are connected to each other, and the shape of the convex rib 6 is adapted to the shape of the mounting groove 7; a protrusion is provided on the outer surface of the convex rib 6; a clamping space is provided on the side wall of the mounting groove 7 adjacent to the protrusion, and the protrusion is clamped in the clamping space. The clamping space can be surrounded by the inner wall of a through hole, a blind hole or a groove-shaped structure, and the through hole, the blind hole or the groove-shaped structure is provided on the side wall of the mounting groove 7. The clamping space cooperates with the protrusion to achieve limiting, preventing the convex rib 6 of the annular structure from rotating in the mounting groove 7. The shape of the protrusion is the same as the shape of the clamping space. The protrusion can be set in a variety of shapes, such as: cylinder, cube, triangle, etc.

[0040] In order to further improve the limiting effect, preferably, the plurality of protrusions are evenly distributed on the upper surface of the rib 6 .

[0041] Preferably, the rib 6 and the protrusion are integrally formed, and the mounting groove 7 and the metal outer cover 5 are integrally formed.

[0042] In order to facilitate the user to open the cover assembly, preferably, the outer periphery of the metal outer cover 5 is provided with an anti-slip portion 9. The anti-slip portion 9 can be an anti-slip strip bonded to the outer periphery of the metal outer cover 5. Preferably, the anti-slip portion 9 is a tooth-shaped structure integrally formed with the metal outer cover 5. The tooth-shaped structure increases friction and facilitates the user to open the cover assembly.

[0043] The metal outer cover 5 is preferably made of aluminum alloy, which has the advantages of low density, high strength, good plasticity, and easy printing of patterns.

[0044] The method for forming a plastic bottle mouth sealing cover comprises the following steps:

[0045] The metal outer cover 5 is pressed onto the outer surface of the main body 2 of the plastic inner cover 1 by a press-fitting device, and connected by connecting pieces to form an integral structure.

[0046] The plastic inner cover 1 includes a main body 2 and an anti-counterfeiting ring 3 arranged up and down; the plastic inner cover 1 is processed along the circumference to form a connection 4, and the connection 4 is located between the main body 2 and the anti-counterfeiting ring 3. The connection 4 is formed by a cutting tool, such as point cutting. The metal outer cover 5 is a barrel structure with an opening downward. After the metal outer cover 5 and the main body 2 are press-fitted, the lower end of the metal outer cover 5 is located above the connection 4, and the metal outer cover 5, the connecting piece and the main body 2 form a cover assembly. The cover assembly is rotated, the connection 4 is disconnected, the cover assembly is separated from the plastic bottle mouth 13, and the anti-counterfeiting ring 3 remains on the plastic bottle mouth 13. When the connecting piece is a viscose product, the connecting piece is arranged between the metal outer cover 5 and the main body 2. Under the action of the pressing equipment, the metal outer cover 5, the viscose product and the main body 2 are pressed into an integral structure.

[0047] Further, the steps include:

[0048] A, press-fit the upper part of the metal outer cover 5 onto the upper part of the main body 2. After press-fitting, the inner surface of the upper part of the metal outer cover 5 contacts the outer surface of the upper part of the main body 2.

[0049] B. The outer periphery of the main body 2 is provided with a convex rib 6 of an annular structure, and is arranged near the connection 4; the side wall of the metal outer cover 5 is pressed onto the upper surface of the convex rib 6 to form a clamping portion; the lower end of the metal outer cover 5 extends below the lower surface of the convex rib 6 to form an extension portion 8. The inner wall of the upper mold 11 corresponding to the upper surface of the convex rib 6 is provided with a press-fitting protrusion 1101, and the press-fitting protrusion 1101 applies pressure to the side wall of the metal outer cover 5 and the upper surface of the convex rib 6 at the same time, and the side wall of the metal outer cover 5 and the upper surface of the convex rib 6 are plastically deformed to form a clamping portion. The clamping portion includes a protrusion located on the upper surface of the convex rib 6 and an installation space located on the side wall of the metal outer cover 5, that is, the protrusion is clamped in the installation space. The protrusion and the installation space cooperate to effectively prevent the main body 2 and the metal outer cover 5 from rotating.

[0050] C, the extension part 8 is pressed onto the lower surface of the rib 6 to form a curling edge. The curling edge is formed by the lower die 12, and the curling edge after press-fitting is in contact with the lower surface of the rib 6 to prevent the main body 2 and the metal outer cover 5 from relative movement in the axial direction L and falling off.

[0051] Before step C, the method further includes step D, in which a cut 10 is machined along the circumferential direction of the inner surface of the side wall of the metal outer cover 5, and the cut 10 is located at the extension 8 and close to the lower surface of the rib 6. Step D is performed before step A, and the cut 10 is formed by rolling. Step D is performed before step B or before step C, and the cut 10 is formed by tool machining on a lathe or milling machine.

[0052] As a further preferred embodiment, the metal outer cover 5 is made of aluminum alloy. Aluminum alloy products have the advantages of low density, high strength, good plasticity, and easy printing of patterns.

[0053] The above is a specific embodiment of the present invention. It can be seen from the implementation process that the present invention provides a plastic bottle mouth packaging cover that is easy to print patterns on. The packaging cover not only has good adaptability to the plastic bottle mouth and stable connection, but also has the advantages of exquisiteness, firm coloring and fidelity on the outer surface of the packaging cover, which is suitable for the packaging of personalized and mid-to-high-end products. A molding method of a plastic bottle mouth packaging cover is also provided.

Claims

1. A method for forming a plastic bottle mouth sealing cover, characterized in that: A plastic bottle mouth sealing cap comprises a plastic inner cap (1), the plastic inner cap (1) comprising a main body (2) and an anti-counterfeiting ring (3) arranged above and below, the lower end of the main body (2) being connected to the anti-counterfeiting ring (3) and forming a connection (4) along the circumferential direction; and further comprising a metal outer cap (5); the metal outer cap (5) being sleeved on the outer surface of the main body (2) and connected via a connecting piece; the lower end of the metal outer cap (5) being located above the connection (4); the connecting piece comprising a mounting groove (7) and a convex rib (6) of an annular structure that are connected to each other. The shape of the convex rib (6) matches the shape of the mounting groove (7); a protrusion is provided on the outer surface of the convex rib (6); a clamping space is provided on the side wall of the mounting groove (7) adjacent to the protrusion, and the protrusion is clamped in the clamping space; a plurality of the convex ribs (6) are arranged at intervals along the outer circumference of the main body (2); a plurality of the mounting grooves (7) are arranged at intervals along the circumference of the metal outer cover (5); the clamping space is surrounded by the inner wall of a through hole, a blind hole or a groove-shaped structure, and the through hole, the blind hole or the groove-shaped structure is provided on the side wall of the mounting groove (7); Includes steps: The metal outer cover (5) is pressed onto the outer surface of the main body (2) of the plastic inner cover (1) by means of a press-fitting device, and the metal outer cover (5) is connected via a connecting piece to form an integral structure; A, press-fit the upper part of the metal outer cover (5) onto the upper part of the main body (2); B, a convex rib (6) of an annular structure is provided on the outer periphery of the main body (2) and is arranged close to the connection (4); The side wall of the metal outer cover (5) is pressed onto the upper surface of the convex rib (6) to form a clamping portion; the lower end of the metal outer cover (5) extends below the lower surface of the convex rib (6) to form an extension portion (8); The inner wall of the upper mold (11) corresponding to the upper surface of the convex rib (6) is provided with a press-fitting protrusion (1101), and the press-fitting protrusion (1101) applies pressure to the side wall of the metal outer cover (5) and the upper surface of the convex rib (6) at the same time, so that the side wall of the metal outer cover (5) and the upper surface of the convex rib (6) are both plastically deformed to form a clamping portion; the clamping portion includes a protrusion located on the upper surface of the convex rib (6) and an installation space located on the side wall of the metal outer cover (5), that is, the protrusion is clamped in the installation space; C, press-fitting the extension portion (8) onto the lower surface of the convex rib (6) to form a curled edge; The curling edge is formed by the lower die (12), and the curling edge after press-fitting is in contact with the lower surface of the convex rib (6).

2. The method for forming a plastic bottle mouth sealing cover according to claim 1, characterized in that: Before step C, the method further includes step D, of machining a cut mark (10) along the circumferential direction of the inner surface of the side wall of the metal outer cover (5), wherein the cut mark (10) is located on the extension portion (8) and close to the lower surface of the rib (6).

3. The method for forming a plastic bottle mouth sealing cover according to claim 1, characterized in that: The plurality of protrusions are evenly distributed on the upper surface of the convex rib (6).

4. The method for forming a plastic bottle mouth sealing cover according to claim 1, characterized in that: The convex rib (6) and the protrusion are integrally formed, and the mounting groove (7) and the metal outer cover (5) are integrally formed.

5. The method for forming a plastic bottle mouth sealing cover according to claim 1, characterized in that: An anti-slip portion (9) is provided on the outer periphery of the metal outer cover (5).

6. The method for forming a plastic bottle mouth sealing cover according to claim 1, characterized in that: The metal outer cover (5) is made of aluminum alloy.

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