Paper pulp molding cup cover

Abstract

The invention relates to a paper pulp molding cup cover, in particular to a paper pulp molding cup cover which is characterized in that when two cup covers are stacked, an arc-shaped concave surface of a lower inclined annular side wall of the cup cover on the upper layer is matched with an arc-shaped outer wall of an arc-shaped sealing part of the cup cover on the lower layer; the arc-shaped concave surface of the inner side surface of the downward inclined annular side wall is in surface contact with the arc-shaped outer wall of the arc-shaped sealing part of the other cup cover, the two cup covers are in surface contact without indentation, and the contact surfaces are in cambered surface contact, so that the cup covers have a guiding effect during stacking, and a plurality of cup covers are easy to stack, are stacked neatly and are not easy to fall down; and the radial movement cannot be generated.

Description

Technical Field

[0001] The present invention relates to the field of daily necessities, and in particular to a pulp molded cup cover which has a guiding function when stacked, and multiple cup covers are easy to stack and stack neatly, not easily tipped over, and will not produce radial movement. Background Art

[0002] With rising environmental awareness and the convergence of ingenious research and development, paper-plastic products made from pulp or plant fibers, molded through molds, are rapidly gaining acceptance across various industries and the general public due to their advantages of easy recycling, remanufacturing, and reuse. A wide variety of paper-plastic products are gradually replacing various plastic products in our daily lives, including bowls, plates, cup lids, straws, packaging materials, and shock absorbers. However, due to the shift from plastic to paper-plastic, the molding process for paper-plastic products lacks the familiarity and ease of forming plastic shapes that are common in the industry. Consequently, many products still lack the effects or functions of plastic products, either during or after molding. However, the paper-plastic industry is still in its infancy and has significant room for improvement. As one of the most common consumables in daily life, cup lids have particularly stringent requirements. As a container, cup lids require not only food-grade materials and hygienic conditions, but also excellent sealing and enhanced safety.

[0003] At present, the sealing performance of conventional paper-plastic cup lids is far inferior to that of plastic cup lids due to the limitations of molding conditions and materials. Conventional paper-plastic cup lids use negative angle grooves, inward-inclined slanted walls or various geometric methods as the sealing part of the cup body when they are molded. When the hoop outside the cup body is fastened, the cup lid is easy to fall off or cannot be completely sealed because the size cannot be fully matched, which often causes the liquid in the cup to leak or overflow. Conventional paper-plastic cup lids are collected in a vertical stacking manner. Figure 5 As shown, taking the upper and lower cup covers 3 and 4 as an example, the outer annular wall 31 of the upper cup cover 3 will conflict with the sealing portion 41 of the lower cup cover 4. Since the outer annular wall 31 of the upper cup cover 3 and the sealing portion 41 of the lower cup cover 4 are in linear contact, stacking indentations will be generated on the surfaces of the upper cup cover 3 and the lower cup cover 4. At the same time, radial movement will occur between the upper and lower cup covers 3 and 4, and they are easy to tip over. The upper and lower cup covers 3 and 4 are also prone to fitting too tightly, resulting in wire jamming, making it difficult to separate the two from each other. Therefore, in order to solve the above defects, the present invention was created after a long period of research and development. Summary of the Invention

[0004] The main purpose of the present invention is to provide a pulp molded cup cover that will not cause indentations when stacked and has a guiding function; the two cup covers are not easily stuck and are easy to take out and separate; and multiple cup covers are easy to stack and stack neatly, not easy to tip over, and will not produce radial movement.

[0005] A secondary purpose of the present invention is to achieve the effect of complete fastening and sealing of the pulp molded cup cover to the cup body.

[0006] The pulp molded cup cover of the present invention comprises: The outer edge of the cup lid is provided with a downwardly extending annular lid edge, and the annular lid edge includes an annular lower side wall extending vertically downward, one end of the annular lower side wall is connected to the cup lid by an arc-shaped sealing portion, and the other end of the annular lower side wall is provided with a downwardly extending and arc-shaped lower inclined annular side wall, and the inner side surface of the lower inclined annular side wall has an arc-shaped concave surface; when two cup lids are stacked, the arc-shaped concave surface of the lower inclined annular side wall of the cup lid on the upper layer is matched with the arc-shaped outer wall of the arc-shaped sealing portion of the cup lid on the lower layer.

[0007] Furthermore, the cup cover is provided with a central top cover plate, and an upward inclined annular side wall extends downward from the outer edge of the central top cover plate. The end of the upward inclined annular side wall is extended toward the horizontal plane to form an annular expansion wall, and the end of the annular expansion wall is provided with the aforementioned arc-shaped sealing portion.

[0008] Furthermore, an annular buckling portion is provided at the bottom of the inner side surface of the annular lower side wall, and the arc-shaped inner wall of the buckling portion is connected to the aforementioned arc-shaped concave surface.

[0009] Furthermore, the annular cover edge includes an outer arc-shaped enlarged annular wall extending from the end of the lower inclined annular side wall.

[0010] Furthermore, the outer radius of the arc-shaped sealing portion is equal to the radius of the arc-shaped concave surface.

[0011] Furthermore, when two cup lids are stacked, the arc-shaped concave surface of the inner side surface of the lower inclined annular side wall is in surface contact with the upper edge of the arc-shaped sealing portion of the other cup lid. The contact surface is an arc surface contact. The two cup lids are in surface contact without causing indentations, and have a guiding effect when stacked. Multiple cup lids are easy to stack and not easy to fall over, and radial movement will not occur.

[0012] After adopting the above solution, the present invention has the following technical effects: 1. The two cup lids are in surface contact without causing indentations, and the contact surface here is an arc surface, which has a guiding effect when stacking. The two cup lids are not easy to fit and get stuck, and are easy to take and separate. Multiple cup lids are easy to stack and stack neatly without tipping over, and will not produce radial movement.

[0013] 2. Furthermore, the arcuate inner wall of the buckle portion is connected to the arcuate concave surface, and they are in contact with the arcuate outer wall of the arcuate sealing portion of another cup lid, so that the contact surface is larger when the two cup lids are stacked, and the stacking stability is better.

[0014] 3. Furthermore, the structural design of the arc-shaped sealing portion and the buckling portion enables the cup lid to be completely fastened and sealed to the cup body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of a cup cover of the present invention.

[0016] Figure 2 It is a cross-sectional schematic diagram of two cup lids of the present invention overlapping longitudinally.

[0017] Figure 3 yes Figure 2 A partial enlarged view of .

[0018] Figure 4 It is a partial enlarged cross-sectional view of the combination of the cup cover and the cup body of the present invention.

[0019] Figure 5 It is a schematic diagram of common forms of known cup lids.

[0020] Explanation of the accompanying drawings: 1 cup cover; 10 central top cover plate; 11 upper inclined annular side wall; 12 annular expansion wall; 13 arc-shaped sealing portion; 14 annular lower side wall; 15 lower inclined annular side wall; 16 buckling portion; 161 arc-shaped inner wall; 17 arc-shaped concave surface; 18 outer arc-shaped expansion annular wall; 2 cup body; 21 outer hoop; 3 upper cup cover; 31 outer annular wall; 4 lower cup cover; 41 sealing portion; R outer radius; Q radius. DETAILED DESCRIPTION

[0021] For a detailed description of the specific structure of the present invention, please refer to Figures 1 to 4 As shown, the present invention provides a pulp molded cup cover 1, which is provided with a central top cover plate 10, and an upward inclined annular side wall 11 extends downward from the outer edge of the central top cover plate 10, and an annular expansion wall 12 is extended in the horizontal direction at the end of the upper inclined annular side wall 11, and an arc-shaped sealing portion 13 is provided at the end of the annular expansion wall 12 and an annular cover edge extending downward at the outer end, The annular cover edge includes an annular lower side wall 14 extending vertically downward, and a downwardly extending and arc-shaped lower inclined annular wall 12 is provided at the end of the annular lower side wall 14. The annular side wall 15 has an annular buckling portion 16 convexly provided on the inner side surface of the turning point of the annular lower side wall 14 and the lower inclined annular side wall 15, and the inner side surface of the lower inclined annular side wall 15 has an arc-shaped concave surface 17. The arc-shaped inner wall 161 of the buckling portion 16 is connected to the arc-shaped concave surface 17. The end of the lower inclined annular side wall 15 extends outwardly into an arc-shaped expansion ring wall 18. When two cup lids 1 are stacked, the arc-shaped concave surface 17 of the lower inclined annular side wall 15 of the cup lid 1 on the upper layer is matched with the arc-shaped outer wall of the arc-shaped sealing portion 13 of the cup lid 1 on the lower layer. The aforementioned arc-shaped sealing portion 13 is semicircular.

[0022] by Figure 1The viewing direction and the full cross-sectional view of the cup cover 1 are used for illustration. The outer radius R of the arc-shaped sealing portion 13 is equal to the radius Q of the arc-shaped concave surface 17 , that is, the outer radius R=radius Q.

[0023] When multiple cup lids 1 are to be stacked longitudinally, the arcuate concave surface 17 on the inner side surface of the lower inclined annular side wall 15 is in surface contact with the arcuate outer wall of the arcuate sealing portion 13 of another cup lid 1, so that the two cup lids 1 are in surface contact without causing indentations, and the contact surface here is an arcuate contact, which has a guiding effect when stacking, and the multiple cup lids 1 are easy to stack and not easy to tip over, and radial movement will not occur. In addition, the arcuate inner wall 161 of the buckle portion 16 is connected to the arcuate concave surface 17, and they are in contact with the arcuate outer wall of the arcuate sealing portion 13 of another cup lid 1, so that the contact surface of the two cup lids 1 is larger when stacked, and the stacking stability is better.

[0024] When the cup cover 1 is put on the cup body 2 from top to bottom, the arc-shaped sealing portion 13 is sequentially pressed against the upper edge of the cup body 2 and is put downwardly. Figure 4 Taking the embodiment shown as an example, the upper edge of the cup body 2 is an outer hoop 21 formed by curling a thin sheet. When the outer hoop 21 of the cup body 2 is pressed by the buckling portion 16 of the cup cover 1, it will be slightly deformed. The outer hoop 21 continues to follow the surface of the buckling portion 16 until it reaches the arcuate sealing portion 13 of the cup cover 1. At this time, the outer hoop 21 of the cup body 2 is completely accommodated in the arcuate sealing portion 13 and is in close contact with it without a gap. The buckling portion 16 of the cup cover 1 contacts the outer side surface of the outer hoop 21 of the cup body 2. The structural design of the arcuate sealing portion 13 and the buckling portion 16 makes the cup cover 1 completely fastened and sealed to the cup body 2.

[0025] In summary, the present invention provides a pulp molded cup lid 1, the outer edge of the cup lid 1 is provided with a downwardly extending annular lid edge, the annular lid edge includes a vertically downwardly extending annular lower side wall 14, one end of the annular lower side wall 14 is connected to an arc-shaped sealing portion 13, and the other end of the annular lower side wall 14 is provided with a downwardly extending and arc-shaped lower inclined annular side wall 15, and the inner side surface of the lower inclined annular side wall 15 has an arc-shaped concave surface 17; when two cup lids 1 are stacked, the arc-shaped concave surface 17 of the lower inclined annular side wall 15 of the cup lid 1 on the upper layer is matched in position On the arcuate outer wall of the arcuate sealing portion 13 of the lower cup lid 1, the arcuate concave surface 17 on the inner side surface of the lower inclined annular side wall 15 is in surface contact with the arcuate outer wall of the arcuate sealing portion 13 of the other cup lid 1, so that the two cup lids 1 are in surface contact without causing indentations, and the contact surface here is an arcuate contact, which has a guiding effect when stacking, and multiple cup lids 1 are easy to stack and stack neatly without being easily tipped over, and radial movement will not occur; therefore, the provision of the snap-fit portion 16 is not necessary, and the purpose of the present invention can also be achieved in other embodiments without the snap-fit portion 16. When the inner side surface of the turning point of the annular lower side wall 14 and the lower inclined annular side wall 15 is convexly provided with an annular snap-fit portion 16, and the structural design of the arcuate sealing portion 13 and the snap-fit portion 16 makes the cup lid 1 completely fastened and sealed to the cup body 2.

Claims

1. A pulp molded cup cover, characterized in that: The outer edge of the cup lid is provided with a downwardly extending annular lid edge, and the annular lid edge includes an annular lower side wall extending vertically downward, one end of the annular lower side wall is connected to the cup lid by an arc-shaped sealing portion, and the other end of the annular lower side wall is provided with a downwardly extending and arc-shaped lower inclined annular side wall, and the inner side surface of the lower inclined annular side wall has an arc-shaped concave surface; when two cup lids are stacked, the arc-shaped concave surface of the lower inclined annular side wall of the cup lid on the upper layer is matched with the arc-shaped outer wall of the arc-shaped sealing portion of the cup lid on the lower layer.

2. The pulp molded cup cover according to claim 1, characterized in that: The cup cover is provided with a central top cover plate, and an upward inclined annular side wall extends downward from the outer edge of the central top cover plate. The end of the upward inclined annular side wall is expanded toward the horizontal plane to form an annular expansion wall, and the end of the annular expansion wall is provided with the aforementioned arc-shaped sealing portion.

3. The pulp molded cup cover according to claim 1, characterized in that: An annular buckling portion is provided at the bottom of the inner side surface of the annular lower side wall, and the arc-shaped inner wall of the buckling portion is connected to the aforementioned arc-shaped concave surface.

4. The pulp molded cup cover according to claim 1, characterized in that: The annular cover edge includes an outer arc-shaped enlarged annular wall extending from the end of the lower inclined annular side wall.

5. The pulp molded cup cover according to claim 1, characterized in that: The outer radius of the arc-shaped sealing portion is equal to the radius of the arc-shaped concave surface.

6. The pulp molded cup cover according to claim 1, characterized in that: When two cup lids are stacked, the arc-shaped concave surface of the inner side surface of the lower inclined annular side wall contacts the upper edge of the arc-shaped sealing portion of the other cup lid in a surface contact manner. The contact surface is an arc surface contact. The two cup lids are in surface contact without causing indentations, and have a guiding effect when stacked. Multiple cup lids are easy to stack and are not easy to tip over, and radial movement will not occur.

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