CN110436051A - Paper cap and its moulding process - Google Patents

Abstract

The invention discloses a paper cover and its molding process. The paper cover includes a paper ring and a cover surface, and is characterized in that: the upper end of the paper ring is provided with an inner extension, and the inner end of the inner extension is provided with a lower extension. The lower extension is connected to the outer periphery of the cover, and an annular accommodation groove is formed between the paper ring, the inner extension and the lower extension. When the paper lid is placed on the upper end of the paper container, the upper end of the paper container is buckled in the accommodation groove inside, and the inner wall of the holding tank is sealed and bonded to the inner wall of the paper container; the paper cover forming process is characterized in that it includes the following steps: 1) rolling the upper end of the heat-treated paper roll inward to form a dimple edge, The socket edge forms the annular receiving groove; 2) connecting the outer periphery of the cover surface to the socket edge. The invention has a stable structure and is easy to manufacture. By providing a receiving groove, it can be stably fastened to the upper end of the paper container, and sealed with the inner wall of the paper container, preventing liquid from overflowing from the joint between the paper cover and the paper container.

Description

Paper cover and its molding process

technical field

The invention relates to an improved invention of a paper container cover, in particular to a paper cover used on a paper cup or a paper bowl to prevent liquid from overflowing and an improved invention of its forming process.

Background technique

Paper containers, such as paper cups or paper bowls, are widely used due to the environmental protection characteristics of their materials. Usually, paper cups or paper bowls are equipped with paper covers due to their use needs. However, the existing paper covers include a connected paper ring and cover When the paper cover is set on the upper end of the paper cup or bowl, the inner wall of the paper circle is closely connected with the upper end of the paper cup or bowl, so that the paper cover is firmly fixed on the upper end of the paper cup or bowl, but it cannot avoid the inner wall of the paper cup or bowl. The liquid overflows from the joint between the paper lid and the paper cup or bowl.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a paper cover with a stable structure and preventing spillage and its molding process.

In order to solve the above technical problems, the present invention is realized by adopting the following technical scheme: the paper cover includes a paper circle and a cover surface, and is characterized in that: the upper end of the paper circle is provided with an inner extension, and the inner end of the inner extension A lower extension is provided, and the lower extension is connected to the outer periphery of the cover surface, and an annular accommodation groove is formed between the paper circle, the inner extension and the lower extension. It is fastened in the receiving groove, and the inner wall of the receiving groove is tightly bonded to the inner wall of the paper container.

The accommodating groove and the upper end of the paper container are clamped and matched, and a limiting flange is provided on the outer inner wall of the corresponding accommodating groove, and the limiting flange is matched with the lower part of the crimping mouth.

The lower end of the paper circle is folded inward by 180° to form a folded edge, the folded edge fits the inner wall of the paper circle, and the upper edge of the folded edge forms the limiting flange, or the folded edge faces upward The inner protrusion forms the limiting flange.

The paper ring protrudes inward to form the limiting flange.

The inner extension is set to match the arc surface of the curved mouth or the plane matching the square mouth.

The inner diameter of the lower section of the paper circle is greater than the outer diameter of the upper section of the paper circle, the lower section of the paper circle is vertically arranged with the upper section of the paper circle, and the paper circle is provided with a transition slope or an arc surface connecting the lower section of the paper circle and the upper section of the paper circle, Alternatively, the whole paper circle is set on a conical surface.

The tissue lap joints on the paper circle, the inner extension and the lower extension are relatively arranged and matched with the tissue lap joints on the paper container and its upper end roll mouth.

The outer periphery of the cover is provided with an upper fold, and the upper fold is attached to the inner or outer surface of the lower extension; or the outer periphery of the cover is provided with a lower fold, and the lower fold is attached to the lower extension. medial side.

The lower end of the paper circle is folded inward by 180° to form a folded edge, which fits with the inner wall and the inner extension of the paper circle. On the outer side of the extension, the upper edge of the folded edge is in contact with the upper edge of the upper folded edge.

The paper cover forming process is characterized in that it includes the following steps: 1) rolling the upper end of the heat-treated paper roll inward to form a dimple edge, and the dimple edge forms the annular receiving groove; 2) connecting the outer periphery of the cover surface to the dimple side.

The lower end of the heat-treated paper ring is rolled into the inner dimple and then rolled back and pressed against the inner wall of the paper ring to form a turned edge, and the upper edge of the turned edge forms the limiting flange.

The outer periphery of the cover surface is press-formed with an upper fold, and the upper fold is fitted on the inner side wall or the outer side wall of the nest edge; or the outer periphery of the cover surface is pressed and formed with a lower fold edge, and the lower fold is fitted on the inner side of the nest edge wall.

The beneficial effect of the present invention is that the improved paper cover and its molding process have a reasonable structure and are easy to manufacture, and the paper cover can be stably closed on the upper port of the paper container by setting a matching groove to fasten the upper end of the paper container. In addition, the inner wall of the containing groove is tightly bonded to the inner wall of the paper container, which can effectively prevent liquid from overflowing from the joint between the paper cover and the paper container.

Description of drawings

The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is an enlarged view of part A of Fig. 1 of the present invention.

Fig. 3 is the structure diagram 1 of the clamping fit between the receiving groove and the roll opening according to the present invention.

Fig. 4 is the second structural drawing of the clamping fit between the receiving groove and the roll mouth of the present invention.

Fig. 5 is the first interlocking structure diagram of the present invention.

Fig. 6 is the second interlocking structure diagram of the present invention.

Fig. 7 is a structure diagram of the bonding joint of facial tissue overlapping joints according to the present invention.

Fig. 8 is a butt joint structure diagram of the folded edge and the upper folded edge according to the present invention.

Fig. 9 is a structural diagram of the present invention where the upper hem is attached to the outer side of the lower extension.

Detailed ways

Accompanying drawing has shown structure of the present invention, further illustrates its relevant details below again in conjunction with accompanying drawing. Referring to accompanying drawing 1, accompanying drawing 2, this paper cover comprises paper ring 1 and cover surface 2, and described paper ring 1 upper end is provided with inner extension 3, and described inner extension 3 inner end is provided with lower extension 4, and described The lower extension 4 is connected to the outer periphery of the cover surface 2, and an annular receiving groove 5 is formed between the paper ring 1, the inner extension 3 and the lower extension 4. When the paper cover is set on the upper end of the paper container 6, the upper end of the paper container 6 is rolled The mouth 7 is fastened in the accommodation groove 5, so that the roll mouth 7 is closely attached to the accommodation groove 5, and it is not easy to disengage, and the inner wall of the inner side of the accommodation groove 5 and the inner wall of the paper container 6 are sealed and fitted, and the sealing fit can be the accommodation groove 5 Line contact forms a circle of line seals or surface contact forms a circle of surface seals between the inner inner wall of the paper container 6 inner walls.

In order to enhance the fastening stability between the accommodation groove 5 and the upper end curl mouth 7 of the paper container 6, the accommodation groove 5 and the upper end curl mouth 7 of the paper container 6 are clamped and matched, and the corresponding accommodation groove 5 is provided with a limiting flange 8 on the outer inner wall , the limit flange 8 cooperates with the lower part of the roll mouth 7. Specifically, referring to accompanying drawing 3, the lower end of the paper ring 1 is folded inward by 180° to form a folded edge 9, and the folded edge 9 is aligned with the paper circle. The inner wall of the ring 1 fits together, and the upper end of the folded edge 9 forms the limit flange 8, or, referring to the accompanying drawing 4, the inward protrusion of the folded edge 9 forms the limit flange 8; or , protruding inward directly on the paper ring 1 to form the limiting flange 8 .

The inner extension 3 is set to match the arc surface of the arc-shaped mouth 7 or the plane of the square mouth 7 , so that the inner extension 3 is closely attached to the mouth 7 .

The inner diameter of the lower section of the paper circle 1 is greater than the outer diameter of the upper section of the paper circle 1. Referring to accompanying drawing 5, the lower section of the paper circle 1 and the upper section of the paper circle 1 are vertically arranged, and the paper circle 1 is provided with a connection between the lower section of the paper circle 1 and the upper section of the paper circle 1. The transition bevel 10 or arc-shaped surface of the upper section of the paper circle 1 is used for transition and guidance, or, referring to accompanying drawing 6, the whole of the paper circle 1 is set on a conical surface, which is convenient for the paper cover to be socketed stack.

Referring to accompanying drawing 7, described paper ring 1, inner extension 3 and lower extension 4 face paper overlap joints 11 and paper container 6 and the face paper overlap joints 12 of upper end roll mouth 7 are arranged relatively, match paste Close, that is, the lap joints of the paper circle 1, the inner extension 3 and the lower extension 4 are high on the left and low on the right, and the lap joints of the corresponding paper container 6 and its upper end roll mouth 7 are high on the right and bottom on the left. It is used to make up for the gap caused by the overlapping of paper at the overlapping interface of the surface paper.

The upper edge 13 is provided on the outer periphery of the cover surface 2, and the upper edge 13 is attached to the inner or outer surface of the lower extension 4 to improve the connection stability. See accompanying drawing 2, when the upper edge 13 is attached to the lower When extending the inner side of the edge 4, the outer side wall of the upper edge 13 constitutes the inner inner wall of the above-mentioned accommodating groove 5; referring to accompanying drawing 9, when the upper edge 13 is attached to the outer side of the lower extension 4, the outer side of the lower extension 4 That is, the inner inner wall of the above-mentioned receiving groove 5 is formed; or the outer periphery of the cover surface 2 is provided with a lower folded edge (not shown in the drawings), the lower folded edge is attached to the inner surface of the lower extended edge, and the outer surface of the lower extended edge 4 is The inner wall on the inner side of the above-mentioned receiving groove 5 is constituted.

Referring to accompanying drawing 8, the lower end of the paper ring 1 is folded 180° inwardly to form a folded edge 9, the folded edge 9 fits with the inner wall of the paper ring 1 and the inner extension edge 3, and the outer periphery of the cover surface 2 is provided with There is an upper flap 13, and the upper flap 13 is attached to the outer surface of the lower extension 4. The upper edge of the folded edge 9 is connected to the upper edge of the upper flap 13 to support each other, and the paper circle 1 and the inner edge are raised. Structural stability of Yanbian 3 and Lower Yanbian 4.

The paper cover forming process includes the following steps: 1) rolling the upper end of the heat-treated paper roll 1 inward to form a dimple edge, and the dimple edge forms the annular receiving groove 5; 2) connecting the outer periphery of the cover surface 2 to the dimple edge superior.

It also includes the following steps: roll the lower end of the heat-treated paper ring 1 to the inner nest, roll it back and press it on the inner wall of the paper ring 1 to form a folded edge 9, and the upper end of the folded edge 9 forms the limit flange 8 .

Step 2) Preferably, the outer peripheral edge of the cover surface 2 is press-formed with an upper flange 13, and the upper flange 13 is attached to the inner side wall or the outer side wall of the nest edge; The folded edge fits on the inner side wall of the nest edge.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. A paper cover, comprising a paper circle and a cover surface, characterized in that: the upper end of the paper circle is provided with an inner extension, the inner end of the inner extension is provided with a lower extension, and the lower extension is connected with the outer periphery of the cover surface, the An annular accommodation groove is formed between the paper circle, the inner extension and the lower extension. When the paper cover is placed on the upper end of the paper container, the upper end of the paper container is buckled in the accommodation groove, and the inner wall of the accommodation groove is aligned with the inner wall of the paper container. Between the airtight fit. 2. The paper cover according to claim 1, characterized in that: said accommodation groove is snap fit with the upper end of the paper container, and a limiting flange is provided on the outer inner wall of the corresponding accommodation groove. The lower limit fit of the mouth. 3. The paper cover according to claim 2, characterized in that: the lower end of the paper ring is folded inward by 180° to form a folded edge, the folded edge fits the inner wall of the paper ring, and the upper end of the folded edge The limit flange is formed along the edge, or the limit flange is formed by protruding inward from the turned edge. 4. The paper cover according to claim 2, characterized in that: said paper ring protrudes inward to form said limiting flange. 5 . The paper cover according to claim 1 , wherein the inner extension is set to match an arc surface of an arc-shaped mouth or a plane matching a square mouth. 6 . 6. The paper cover according to claim 1, characterized in that: the inner diameter of the lower section of the paper circle is greater than the outer diameter of the upper section of the paper circle, the lower section of the paper circle and the upper section of the paper circle are vertically arranged, and the paper circle is provided with The transition inclined surface or arc-shaped surface connecting the lower section of the paper circle and the upper section of the paper circle, or, the whole of the paper circle is set as a conical surface. 7. The paper cover as claimed in claim 1, characterized in that: the lap joints of the paper circle, the inner extension and the lower extension are opposite to the lap joints of the paper container and its upper end roll mouth Arrangement, matching fit. 8. The paper cover according to claim 1, characterized in that: an upper fold is provided on the outer periphery of the cover, and the upper fold is attached to the inner or outer side of the lower extension; or the outer periphery of the cover is The edge is provided with a lower folded edge, and the lower folded edge is attached to the inner surface of the lower extended edge. 9. The paper cover according to claim 1, characterized in that: the lower end of the paper ring is folded inward by 180° to form a folded edge, and the folded edge fits with the inner wall and inner extension of the paper ring, and the cover An upper edge is provided on the outer peripheral edge of the surface, and the upper edge is attached to the outer surface of the lower extension edge, and the upper edge of the turned edge is in contact with the upper edge of the upper edge. 10. A forming process for making the paper cover according to claim 1, characterized in that it comprises the following steps: 1) rolling the upper end of the heat-treated paper roll inward to form a dimple edge, and the dimple edge forms the ring-shaped accommodating groove; 2) connecting the outer periphery of the cover surface to the edge of the nest. 11. The molding process of the paper cover as claimed in claim 10, characterized in that: the lower end of the heat-treated paper ring is rolled inward and then rolled back and pressed against the inner wall of the paper ring to form a folded edge, the folded edge The upper edge forms the limiting flange. 12. The molding process of the paper lid according to claim 10, characterized in that: the outer periphery of the lid is press-molded with an upper fold, and the upper fold is attached to the inner side wall or the outer side wall of the nest edge; The outer peripheral edge is press-molded with a lower folded edge, and the lower folded edge is attached to the inner side wall of the socket edge.