CN109132174B - Plant fiber molding cup cover - Google Patents
Plant fiber molding cup cover Download PDFInfo
- Publication number
- CN109132174B CN109132174B CN201811073048.XA CN201811073048A CN109132174B CN 109132174 B CN109132174 B CN 109132174B CN 201811073048 A CN201811073048 A CN 201811073048A CN 109132174 B CN109132174 B CN 109132174B
- Authority
- CN
- China
- Prior art keywords
- cup cover
- arc
- shaped groove
- plant fiber
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 41
- 238000000465 moulding Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000007731 hot pressing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 abstract 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract 1
- 235000011613 Pinus brutia Nutrition 0.000 abstract 1
- 241000018646 Pinus brutia Species 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008602 contraction Effects 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/06—Removable lids or covers having a peripheral channel embracing the rim of the container
- B65D43/065—Removable lids or covers having a peripheral channel embracing the rim of the container the peripheral channel having an inverted U-shape
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
The invention relates to a cup cover or a cup cover manufactured by a plant fiber molding method. The utility model provides a novel plant fiber moulding bowl cover structure, under the prerequisite that does not need to carry out secondary operation, thereby this structure bowl cover can well with the sealed function of realization of "annular mouth edge" in paper cup, can prevent again that the bowl cover pine from taking off. The technical proposal is as follows: the plant fiber molding cup cover is characterized in that the cross section from the edge to the center of the cup cover is sequentially provided with a cup cover side straight edge, an arc groove and a cup cover boss which are in smooth connection, and the plant fiber molding cup cover is characterized in that: an annular plane is arranged between the arc-shaped groove and the cup cover boss, and the annular plane is parallel to the horizontal plane.
Description
Technical Field
The invention relates to a plant fiber cup cover or a cover made by a plant fiber molding method, wherein the plant fiber cup cover or the cover comprises paper pulp, and the plant fiber cup cover or the cover is made of a material by mixing and foaming the plant fiber and starch, and is hereinafter called as a plant fiber cup cover; the plant fiber molded cup cover is applicable to all cup covers and box covers which are made of plant fibers and have various shapes, especially to cover on paper cups or paper boxes, and disposable plant fiber molded cup cover or box cover products (hereinafter called cup covers) which are required to be combined with the paper cups or the paper boxes are used as the plant fiber molded cup cover products, and the plant fiber molded cup cover products can be round, square or other special-shaped.
Background
The traditional cup cover adopts plastic suction molding or injection molding, and the cup cover made of plastic has elasticity, so that the cup mouth of the paper cup is easy to fasten. However, the cup cover made of plastic can not be degraded, and causes white pollution to the environment. Therefore, the degradable plant fiber molding cup cover is needed to replace the plastic cup cover, and the manufacturing process of the plant fiber molding product is as follows: the plant fiber is first suction filtered in a suction filter forming device to form wet blank, and the wet blank is then fed into hot pressing mold with certain temperature, and the hot pressing mold is closed and hot pressed to form plant fiber molded cup cover product in various shapes.
As shown in fig. 1, the rim of the cup mouth of the paper cup is of a ring-shaped structure (hereinafter referred to as "ring-shaped rim"), and in order to make the cup cover closely contact with the cup body, the closely contact portion of the cup cover and the "ring-shaped rim" of the paper cup is also made into a ring of an arc-shaped structure similar to the "ring-shaped rim" of the paper cup, namely a so-called annular upwardly convex arc-shaped "groove". Only then can the arc-shaped groove and the annular opening edge cooperate to play a good sealing effect. Therefore, the close contact between the cup cover and the cup body must be: the sealing and the looseness prevention are needed.
In order to realize the two functions, the method adopted at present is to punch a lateral concave-convex barb groove or a groove on the side straight edge of the cup cover; the cup cover is also provided with an anti-loose inner convex strip, a buckle and the like.
The cup cover structure disclosed at present is attempted to be loose-proof by adopting a structure of manufacturing a barb groove in a secondary processing mode. For example, "groove" and chinese patent application No. referred to by the "disposable paper cup lid" patent No. ZL 200920053929.5: 200910157668.6 are so-called "barb grooves". The cup cover structure described in the two patents clearly shows from the illustration and the text, the cup cover and the groove buckled with the flange at the opening of the cup body are laterally protruded, and the product with the laterally concave-convex structure is clamped on a die in the manufacturing process, so that the product is difficult to separate from the die, and the demolding is difficult. And the existing cup cover 'barb groove', 'buckle' can be realized only by secondary processing. Not only are the processes complicated, but these so-called "barb grooves", "grooves" and "snaps" have poor locking effect.
Disclosure of Invention
The invention aims to overcome the defects of the background technology, and provides a novel plant fiber molding cup cover structure, and the cup cover with the structure can be well in close contact with the annular opening edge of the cup body of the paper cup so as to realize a sealing function and prevent the cup cover from loosening on the premise of not carrying out secondary processing.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the plant fiber molding cup cover is characterized in that the cross section from the edge to the center of the cup cover is sequentially provided with a cup cover side straight edge, an arc groove and a cup cover boss which are in smooth connection, and the plant fiber molding cup cover is characterized in that: an annular plane is arranged between the arc-shaped groove and the cup cover boss, and the annular plane is parallel to the horizontal plane.
The hanging end of the side straight edge of the cup cover is also connected with a flat edge which is parallel to the horizontal plane and extends outwards.
The annular plane has an annular width greater than 1 mm and less than 15 mm.
The distance between the top of the inner side of the arc-shaped groove and the annular plane is greater than or equal to the radius of the arc-shaped groove.
The working principle of the invention is as follows: according to the invention, an annular plane 6 is arranged between the annular arc-shaped groove 2 and the boss 5 of the cup cover, after the cup cover is hot-pressed and molded and demoulded, the special structure of the cup cover is molded by using plant fibers, and the shrinkage and shrinkage directions of different structures are different after cooling, the shrinkage of the opening of the arc-shaped groove 2 is naturally initiated, so that the annular opening edge 1 of the paper cup is clamped, and the annular opening edge of the cup body is prevented from sliding out of the arc-shaped groove of the cup cover.
The beneficial effects of the invention are as follows: the invention realizes the one-time molding of the plant fiber molding cup cover due to the annular plane 6 and other structures of the cup cover, and avoids the complex link of secondary molding of the plant fiber molding product after molding; the opening of the arc groove 2 can clamp the annular opening edge 1 of the paper cup, and the cup cover structure is convenient to produce and form, good in performance, and capable of obviously reducing production cost, ensuring sealing effect, reducing production links of plant fiber molding cup covers, and providing convenience for full-automatic production.
Drawings
Fig. 1 is a schematic view (cross-sectional view) showing the front view of the paper cup according to the present invention.
Fig. 2 is a schematic front view of the cup cover according to the invention.
Fig. 2.1 is a schematic cross-sectional view of A-A in fig. 2.
Fig. 2.2 is an enlarged schematic view of section I of fig. 2.1.
Fig. 2.3 is an enlarged schematic view of the geometry of section I of fig. 2.1.
Fig. 2.4 is a schematic diagram of a matching structure of the cup cover and the paper cup.
Fig. 2.5 is an enlarged schematic view of the J portion of fig. 2.4.
The reference numerals in the figures illustrate: 1-an annular opening edge and 2-an arc-shaped groove; 3-a side straight edge of the cup cover; 4-flat sides; 5-cup cover boss; 6-an annular plane; 7-a boss side straight edge; 8-groove surface connecting rings; s-cup cover; m-paper cup.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.
As shown in fig. 2, 2.1, 2.2 and 2.3, in the cross-sectional graph of the plant fiber molded cup cover, the cup cover edge to the center of the cup cover is sequentially a cup cover side straight edge 3, an arc-shaped groove 2 and a boss side straight edge 7 of a cup cover boss 5 which are connected smoothly, and the top surface of the cup cover boss can be manufactured into various shapes (such as inclined surfaces, holes and the like) according to requirements; this is similar to the structure of prior plant fiber molded cup covers.
The improvement of the invention is that an annular plane 6 is arranged between the arc-shaped groove 2 and the boss side straight edge 7; therefore, the plant fiber molded cup cover comprises the arc-shaped groove 2, the cup cover side straight edge 3 and the cup cover boss 5, the boss side straight edge 7 is arranged on the side surface of the cup cover boss 5, and the annular arc-shaped groove 2 is positioned at the top of the cup cover side straight edge 3. As shown in fig. 2.1 and 2.2, the annular plane 6 is an annular plane (which is parallel to the horizontal plane in the drawing) and is located between the arc-shaped groove 2 and the cup cover boss 5, namely, between the bottom of the boss side straight edge 7 and the arc-shaped groove 2; the connection between the arc-shaped groove 2 and the annular plane 6 and the connection between the boss side straight edge 7 and the annular plane 6 can be in arc transition.
When the plant fiber molded cup cover is produced, the plant fiber molded cup cover is separated from a die after hot-pressing shaping, the plant fiber molded cup cover can deform and shrink after leaving the hot-pressing shaping die, the final size of the plant fiber molded cup cover mainly depends on the shrinkage of a cooled material and the deformation of the curved surface of the arc-shaped groove 2, and the deformation of the arc-shaped groove 2 is relatively large no matter the plane length or width or the arc length of the curved surface is very small due to the small shrinkage of the material, namely the opening of the curved surface arc is shrunk to be small.
As shown in fig. 2.3, the opening L of the annular arc-shaped groove 2 having a curved surface is contracted to be small due to the arc-shaped deformation of the arc-shaped groove 2, and the annular flat surface 6 is flat, and the contraction amount of the material thereof is small, so that the contraction amount of the annular width W of the annular flat surface 6 is very small. Therefore, the annular plane 6 is established, so that the geometric position and the size of the connection part (also called a groove surface connecting ring 8) between the arc-shaped groove 2 and the annular plane 6 from the center line of the cup cover are basically unchanged, and then the opening L of the arc-shaped groove 2 becomes smaller, and only the arc near the connection part between the arc-shaped groove 2 and the cup cover side straight edge 3 is close to the center line of the cup cover, so that the cup cover side straight edge 3 is driven to incline inwards (as shown in fig. 2.5).
Because the annular mouth edge 1 of the paper cup is a circular ring, the paper cup has certain compressive capacity (shown in figures 2.4 and 2.5); when the annular mouth edge 1 of the paper cup completely slides across the opening of the arc-shaped groove 2 of the cup cover, the opening narrowed by the Zhang Kaihu-shaped groove 2 enters the arc-shaped groove 2, so that the annular plane 6 props against the annular mouth edge 1 of the paper cup, and the annular mouth edge 1 of the paper cup can push the contact part of the arc-shaped groove 2 and the annular mouth edge 1 of the paper cup to rotate outwards around the groove surface connecting ring 8, thereby further leading to the inner inclination of the straight edge 3 of the side of the cup cover. If the depth H of the arc-shaped groove 2 is large enough, the inner inclined effect of the straight edge 3 on the side of the cup cover is obvious; in addition, if the depth of the arc-shaped groove 2 is deep enough, the arc-shaped groove 2 has a clamping effect on the annular mouth edge 1 of the paper cup. The annular plane 6 is propped against the annular opening edge 1 of the paper cup at the inner side of the paper cup opening, so that the two sides of the opening reduced by the arc-shaped groove 2 can clamp the annular opening edge 1 of the paper cup, and the annular opening edge of the cup body is prevented from sliding out of the arc-shaped groove of the cup cover. If a flat edge 4 is arranged at the opening of the cup cover, when the two sides of the opening reduced by the arc-shaped groove 2 clamp the annular opening edge 1 of the paper cup, the outside of the opening reduced by the arc-shaped groove 2 can be further prevented from expanding outwards when external force acts on the cup cover (such as when the cup cover is held by hands), so that the reinforcing effect is realized.
As shown in fig. 2.5, the natural reverse hook and the clamping effect of the arc-shaped groove 2 on the annular mouth edge 1 of the paper cup can achieve the purposes of preventing looseness and sealing between the arc-shaped groove 2 of the plant fiber molded cup cover and the annular mouth edge 1 of the paper cup. Through multiple experiments, if the ring width W of the annular plane 6 is more than 1 mm and less than 20 mm, the anti-loosening and sealing effects are good; the distance H between the top of the arc-shaped groove 2 and the annular plane 6 is larger than or equal to the top arc radius R of the arc-shaped groove 2, and the anti-loosening and sealing effects are better.
Claims (4)
1. Plant fiber molding cup cover, its border is smooth bowl cover side straight flange (3), arcuation slot (2) and bowl cover boss (5) that connect gradually, its characterized in that to the cross section shape at bowl cover center: an annular plane (6) is arranged between the arc-shaped groove and the cup cover boss, and the annular plane is parallel to the horizontal plane;
the plant fiber molded cup cover is separated from the die after hot-pressing shaping, and is deformed and contracted in the cooling process outside the die, so that the side straight edge of the cup cover is inclined inwards;
the opening shrinkage of the annular arc-shaped groove with a curved surface becomes smaller due to the arc-shaped deformation of the arc-shaped groove, and the annular plane is a plane, so that the shrinkage of the material is small, and the shrinkage of the annular width of the annular plane is very small; the arrangement of the annular plane can establish that the geometric position and the size of the connection part of the arc-shaped groove and the annular plane from the center line of the cup cover are basically unchanged, and the opening of the arc-shaped groove is reduced so that the arc near the connection part of the arc-shaped groove and the straight edge of the cup cover side is close to the center line of the cup cover, thereby driving the straight edge of the cup cover side to incline inwards.
2. The plant fiber molded cup cover according to claim 1, wherein: the hanging end of the cup cover side straight edge (3) is also connected with a flat edge (4) which is parallel to the horizontal plane and extends outwards.
3. The plant fiber molded cup cover according to claim 2, wherein: the annular width (W) of the annular plane (6) is greater than 1 mm and less than 15 mm.
4. A plant fiber molded cup cover according to claim 3 wherein: the distance (H) between the inner top of the arc-shaped groove (2) and the annular plane (6) is larger than or equal to the radius (R) of the arc-shaped groove (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073048.XA CN109132174B (en) | 2018-09-14 | 2018-09-14 | Plant fiber molding cup cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811073048.XA CN109132174B (en) | 2018-09-14 | 2018-09-14 | Plant fiber molding cup cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109132174A CN109132174A (en) | 2019-01-04 |
| CN109132174B true CN109132174B (en) | 2024-03-15 |
Family
ID=64825340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811073048.XA Active CN109132174B (en) | 2018-09-14 | 2018-09-14 | Plant fiber molding cup cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109132174B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111483691B (en) * | 2019-01-28 | 2022-04-05 | 金箭印刷科技(昆山)有限公司 | Paper pulp moulded beverage cup cover and its making method |
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| Publication number | Publication date |
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| CN109132174A (en) | 2019-01-04 |
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