阅读说明：本技术 一种单面内侧包胶纸塑结合成型的包装盒 (Single-side inner-side rubber-coated paper-plastic combined formed packaging box ) 是由 王海平 陈德苍 何从友 于 2019-11-18 设计创作，主要内容包括：本发明涉及一种单面内侧包胶纸塑结合成型的包装盒,包括纸部和塑料部,其中：纸部用于围成包装盒的面；塑料部设置于纸部的纸边缘内侧,所述的纸边缘包括沿口处以及面与面的对接处。与现有技术相比,本发明更可靠地解决纸包装接缝处的密封性,使纸盒可靠地盛装水、油等液体,更重要的是实现纸缝处单边包胶,生产工艺简化,并进一步减少塑料,使纸塑包装用料更少、外部印面更完整。(The invention relates to a packaging box formed by combining single-side inner-side rubber-coated paper and plastic, which comprises a paper part and a plastic part, wherein: the paper part is used for enclosing the surface of the packing box; the plastic part is arranged on the inner side of the paper edge of the paper part, and the paper edge comprises an edge opening and a butt joint part of the surface and the surface. Compared with the prior art, the paper packaging structure has the advantages that the sealing performance of the paper packaging seam is more reliably solved, the paper box can reliably contain water, oil and other liquid, more importantly, the unilateral encapsulation of the paper seam is realized, the production process is simplified, the plastic is further reduced, the paper-plastic packaging material is less, and the external printing surface is more complete.)

1. The utility model provides a packing carton that combination moulding is moulded to inboard rubber coating paper of single face which characterized in that includes:

a paper part used for enclosing the surface of the packing box,

the plastic part is arranged on the inner side of the paper edge of the paper part, and the paper edge comprises an edge opening and a butt joint part of the surface and the surface.

2. The single-sided inner-side-wrapped paper-plastic combined formed package according to claim 1, wherein the paper part is used for enclosing the side surface and the bottom surface of the package; the butt joint of the surfaces comprises a butt joint of the side surface and a butt joint of the bottom surface and the side surface.

3. A single-sided inner-coated paper-plastic combined formed package box as claimed in claim 1 or 2, wherein the plastic part is distributed in strip shape inside the paper edge of the paper part.

4. The single-sided inner-side-wrapped paper-plastic combined packaging box according to claim 3, wherein the plastic part at the rim is coated on the inner side of the rim along the length direction of the rim in a flat strip shape.

5. The single-sided inside-encapsulated paper-plastic combination molded package of claim 4, wherein the plastic portion at the mouth further comprises a plastic member forming a rim flange.

6. The single-sided inner-side rubber-coated paper-plastic combined packaging box as claimed in claim 3, wherein:

the plastic part at the butt joint of the surfaces is in a flat strip shape and spans the two surfaces;

when a gap exists at the joint of the surface and the face, the plastic part at the joint of the surface and the face is filled in the gap.

7. The single-sided inner-side rubber-coated paper-plastic combined packaging box as claimed in claim 6, wherein:

the plastic part at the butt joint of the surfaces is of equal thickness;

or when the gap at the joint of the surfaces is large, the plastic part at the joint of the surfaces consists of thick plastic parts which are distributed at the edges of the two surfaces and have the same thickness and thin gap-filling plastic parts which are connected with each other to form a whole.

8. The single-sided inner-side rubber-coated paper-plastic combined formed packaging box according to claim 1, wherein the plastic part is formed by injection molding, and the injection gate is positioned at the edge end part, the butt joint part of the inner side surface of the packaging box and the surface or the bottom surface of the inner side of the packaging box; when the injection molding sprue is positioned at the bottom surface of the inner side of the packaging box, a glue runner connected to a plastic part at the butt joint of the injection molding sprue and the surface is arranged, and the glue runner is in a flat strip shape.

9. The packing box formed by combining paper and plastic with single-sided inner-side rubber coating according to claim 1, wherein the shape of the packing box comprises a polygon, a circle and a special shape, the special shape comprises a round box bottom square with a rim, and the packing box is a packing box with a partition board or a packing box without a partition board.

Technical Field

The invention belongs to the technical field of packaging boxes, relates to a paper-plastic combined packaging box, and particularly relates to a single-side inner-side rubber-coated paper-plastic combined packaging box.

Background

In the prior art, the paper package cannot solve the limitations of the edge sealing performance and the molding and supporting strength of the paper package, so that the application range of the paper package is limited. The mixed raw material (paper-plastic composite material) of the paper pulp and the plastic has the limitations of complex preparation process, shallow and thin inner cavity of a finished product, simple structure, difficult printing and the like, and can not be used for manufacturing a packaging product with deep cavity, complexity and printing surface requirements. In order to solve the problems, Shanghai Zidan food packaging printing company Limited develops paper-plastic combined packaging, and the patent publication numbers are as follows: CN105314204A and CN 209410585U. The two patents define a structure for wrapping and connecting the inner side and the outer side of the paper edge by combining paper and plastic and packaging, solve the problems of manufacturing a deep cavity complex product and improving the sealing and printing characteristics, but have complex production process, more plastic and higher cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a packaging box formed by combining single-side inner-side rubber-coated paper and plastic.

The purpose of the invention can be realized by the following technical scheme:

a single-sided inner-side rubber-coated paper-plastic combined formed packaging box comprises:

a paper part used for enclosing the surface of the packing box (the surface of the packing box can be in a plane shape or a curved surface shape),

the plastic part is arranged on the inner side of the paper edge of the paper part, and the paper edge comprises an edge opening and a butt joint part of the surface and the surface.

In the present invention, the paper portion is preferably formed from paperboard, which may be ordinary paperboard, corrugated board, or other forms of paperboard.

In the invention, the plastic part plays a role in connecting, shaping and reinforcing the paper edge, so that the integrated body achieves the functions of leakage prevention and the like.

Preferably, the paper part is used for enclosing the side surface and the bottom surface of the packing box; the butt joint of the surfaces comprises a butt joint of the side surface and a butt joint of the bottom surface and the side surface.

Preferably, the plastic part is distributed on the inner side of the paper edge of the paper part in a strip shape.

In the invention, the joint of the plastic part and the paper part is formed by wrapping the inner side of the edge of the paper by the plastic part, and the outer side of the paper part is not wrapped or is clamped in a dotted manner by (small) ribs. The inner side edge-wrapping plastic is firmly jointed with the inner side of the paper board, so that reliable sealing is realized and a box body is supported.

Preferably, the plastic part at the bead is in a flat strip shape and is coated on the inner side of the bead along the length direction of the bead.

Preferably, the plastic part at the bead further comprises a plastic part forming a bead edge flange.

Preferably:

the plastic part at the butt joint of the surfaces is in a flat strip shape and spans the two surfaces;

when a gap exists at the joint of the surface and the face, the plastic part at the joint of the surface and the face is filled in the gap.

Preferably:

the plastic part at the butt joint of the surfaces is of equal thickness;

or when the gap between the surfaces at the joint (between the paper edges) is large, the plastic part at the joint of the surfaces consists of thick plastic parts which are distributed at the edges of the two surfaces and have the same thickness and thin gap-filling plastic parts which connect the two thick plastic parts to form a whole (the plastic consumption can be reduced).

The gap at the joint of the surface and the surface is filled with plastic, so that the connection strength of the paper part and the plastic part can be further enhanced.

Preferably, the plastic part is formed by injection molding, and the injection molding sprue is positioned at the butt joint of the edge end part, the surface and the surface of the inner side of the packing box or the bottom surface of the inner side of the packing box; when the injection molding sprue is positioned at the bottom surface of the inner side of the packaging box, a glue runner connected to a plastic part at the butt joint of the injection molding sprue and the surface is arranged, and the glue runner is in a flat strip shape.

In the present invention, the plastic used for the plastic part is preferably biodegradable plastic or common thermoplastic plastic, depending on the contents of the package.

Preferably, the shape of the packing box comprises a polygon, a circle and a special shape, the special shape comprises a round box bottom square with a bead, and the packing box is a packing box with a separation barrier or a packing box without a separation barrier.

Preferably, when the packing box is a packing box with separating barriers, the separating barriers separate the packing box into a plurality of grids, and reinforcing ribs are arranged on the back of the packing box between the grids. The stacking device is used for improving the rigidity of the packaging box, can realize equal-height stacking in stacking, and is easy to pack and take and place.

Compared with the prior art, the invention uses less plastic to reinforce and form the paper board, realizes the sealing effect of the packaging box, has simple production process, saves the consumption of the plastic, basically only presents the paper board on the outer side surface of the packaging box, and ensures that the appearance printing surface of the packaging box is more complete.

Drawings

FIG. 1 is a schematic structural view (upright) of a packing box according to embodiment 1 of the present invention;

FIG. 2 is a schematic view (upside down) of the structure of the packing box of embodiment 1 of the present invention;

FIG. 3 is a schematic view of the paper portion forming of embodiment 1 of the present invention;

FIG. 4 is a schematic view of a plastic part according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a bead bond structure (plastic part coating structure) of the packing box according to embodiment 1 of the present invention;

FIG. 6 is a schematic view of an inside encapsulated structure at the face-to-face interface of the package of example 1 of the present invention;

FIG. 7 is a schematic view of a second inside wrapping construction at a face-to-face interface of the package of example 1 of the present invention;

FIG. 8 is a schematic view showing an injection molding gate at the end of a bead in example 1 of the present invention;

FIG. 9 is a schematic view showing the injection molding gate located at the junction of the inner side face of the package in example 1 of the present invention;

FIG. 10 is a schematic view (top view) of an injection molding gate in example 1 of the present invention when the injection molding gate is located at the inner bottom surface of a package case;

FIG. 11 is a schematic view (upright) of the case where the injection molding gate is located at the inner bottom surface of the package case in example 1 of the present invention;

FIG. 12 is a schematic view showing an increased flow path of glue when an injection molding gate is located at the inner bottom surface of a package case in example 1 of the present invention;

FIG. 13 is a circular packing box with a partition according to embodiment 2 of the present invention;

FIG. 14 shows a square package with different sized and shaped dividers according to example 3 of the present invention;

fig. 15 is a schematic structural view of the case of embodiment 2 and embodiment 3 in which a reinforcing rib is provided on the back surface of the case;

in the figure, 1 is a plastic part, 11 is a plastic part at a bead, 12 is a plastic part forming a bead edge flange, 13 is a plastic part at the joint of a side surface and a side surface, 14 is a plastic part at the joint of a bottom surface and a side surface, 101 is a gap filling plastic part, 102 is a thick plastic part, 103 is a thin gap filling plastic part, 2 is a paper part, 21 is a joint of a side surface and a side surface, 22 is a joint of a bottom surface and a side surface, 31 is an injection gate at the end part of the bead, 32 is an injection gate at the joint of a surface and a surface at the inner side of the packing box, 33 is an injection gate at the bottom surface at the inner side of the packing box, 4 is a flow channel from the injection gate to the plastic part, and.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

Example 1

The packing carton of this embodiment of a single inboard rubber coating paper-plastic combination shaping, as shown in fig. 1-2, including plastics portion 1 and paper portion 2, wherein: the paper part 2 is used for enclosing the surface of the packing box (the surface of the packing box can be in a plane shape or a curved surface shape); the plastic part 1 is arranged on the inner side of the paper edge of the paper part 2, and the paper edge comprises an edge opening and a butt joint part of a surface and a surface.

The paper portion is preferably formed from paperboard (in this embodiment the paper portion 2 is die cut from a flat sheet of paperboard and then folded over, see fig. 3), which may be plain paperboard, corrugated paperboard or other forms of paperboard. In this embodiment, the paper portion is used to enclose the side and bottom surfaces of the package; the face-to-face interface includes a side-to-side interface 21 and a bottom-to-side interface 22.

The shape of the packing box can be polygonal (such as square, hexagon and the like), round, special-shaped and the like, wherein the special shape comprises a round box bottom square along the opening and the like. In this embodiment, the shape of packing carton is square flaring style, and the side is gentle with the side butt joint department transition.

In this embodiment, the plastic part 1 is preferably formed by injection molding, and more preferably, the plastic used for the plastic part 1 may be biodegradable plastic or common thermoplastic plastic, depending on the contents of the package. The plastic part 1 plays a role in connecting, shaping and reinforcing paper edges, so that the integrated body achieves the functions of leakage prevention and the like. The outer side of the package is not covered with plastic (e.g. in this embodiment) or is held in the form of dots with (small) ribs. The inner side edge-wrapping plastic is firmly jointed with the inner side of the paper board, so that reliable sealing is realized and a box body is supported. The plastic part 1 is distributed in strip shape inside the paper edge of the paper part (in a slender strip frame structure), see fig. 4. The joint of the plastic part and the paper part is formed by wrapping the inner side of the edge of the paper by the plastic, and the plastic part 11 at the edge is wrapped on the inner side of the edge (wrapping the inner side of the whole edge) in a flat strip shape along the length direction of the edge; the plastic part at the bead also comprises a plastic part 12 forming a bead edge flange, see fig. 5. The plastic part at the interface of the side and the face (in this embodiment, the plastic part 13 at the interface of the side and the plastic part 14 at the interface of the bottom and the side) is in the shape of a flat strip, and spans the two faces, as shown in fig. 6 and 7. Because combine together paper portion 2 and plastics portion 1 to can solve the shortcoming that the leakproofness is not good at the joint edge seam of cardboard, because only at the inboard rubber coating of paper limit, not only reduce plastics, still make packing carton outward appearance seal more complete again.

When there is a gap at the interface of the surface and the face, the plastic part at the interface of the surface and the face is filled in the gap, forming a gap-filled plastic part 101, see fig. 4 and 6. In one case, the plastic portion at the interface of the faces may be of equal thickness, as shown in FIG. 6; in another case, the plastic part at the interface between the surfaces may further comprise thick plastic members 102 that are distributed at the edges of the two surfaces and have the same thickness, and a thin gap-filling plastic member 103 that connects the two thick plastic members 102 to form a whole, as shown in fig. 7.

During injection molding, the injection gate is positioned at the edge part (see the injection gate 31 at the edge part in fig. 8), the butt joint part of the surface and the surface of the inner side of the packing box (see the injection gate 32 at the butt joint part of the surface and the surface of the inner side of the packing box in fig. 9) or the bottom surface of the inner side of the packing box (see the injection gate 33 at the bottom surface of the inner side of the packing box in fig. 10 and 11); when the injection gate is located at the bottom side inside the package box, see fig. 10 and 11, a glue flow channel 4 is provided which is connected from the injection gate to the plastic part at the junction of the faces, preferably the end of the plastic part 14 at the junction of the bottom and the side faces, said glue flow channel 4 being in the form of a flat strip, as shown in fig. 12.

Example 2

The structure of the packing box formed by combining paper and plastic with single-sided inner side rubber coating in the embodiment can be seen in fig. 13, the basic structure is similar to that of embodiment 1, the structure is formed by filling paper boards with plastic, and the difference from embodiment 1 is that in the embodiment, the packing box is a round packing box with separating baffles, the separating baffles divide the packing box into three fan-shaped cells, the separating baffles are formed by the paper boards, the forming technology adopted by each cell is the same as that of embodiment 1, and the inner sides of the paper edges of the packing box are also subjected to single-sided (inner side) rubber coating and gap filling treatment.

Example 3

The structure of the packing box formed by combining single-sided inner-side rubber-coated paper and plastic is shown in fig. 14, the basic structure is similar to that of the packing box of the embodiment 1 and the embodiment 2, and the difference is that the packing box is large in external dimension and is 4 square shelves. The partitions have different sizes, and the molding technique adopted by each partition is the same as that of the embodiment 1.

Example 4

On the basis of the packing boxes with the separation barriers in the embodiments 2 and 3, the packing box with the single-side inner-side rubber-coated paper and the plastic combined forming is provided with the reinforcing ribs 5 between the partitions on the back side of the packing box, so that the rigidity of the packing box is improved, stacking at equal height during stacking can be realized, and the packing box is easy to pack and take and place, as shown in fig. 15.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.