TW201637948A - Integrally formed laminate lunch box structure and manufacture method thereof - Google Patents

Abstract

An integrally formed laminate lunch box is made by cutting and pressing a single layer laminate paper into an expanded lunch box paper blank having a box body and a cover body, softening the surface by steam, and using upper and lower molds to hot-press the box body and cover body at 120DEG C~160DEG C to make the four corners of the binding area of the paper blank mutually superimposed and bonded together by the hot-melting laminate layer. Further, hot-pressing time is controlled to simultaneously spread the box body and cover body into a concave-convex strengthened surface, so that the lunch box is integrally made to possess sufficient structural strength. Finally, the moisture left in the lunch box molding can be used to determine whether the lunch box is a good product or not, so as to ensure the quality of the outgoing lunch boxes and enhance the safety of a consumer in eating and using the products.

Description

Structure and manufacturing method of one-piece laminating lunch box

The invention relates to a structure and a preparation method of an integrally formed shower box, in particular to a steam to make the paper box embryo extensible, so that the molded lunch box has sufficient structural strength.

According to the traditional disposable tableware (disposable tableware), most of them are made of plastic products, styrofoam (polystyrene) or paper, and the disposable tableware made of styrofoam (polystyrene). The heat will emit toxins, which are harmful to human health, and the tableware cannot be naturally decomposed, which will cause environmental pollution, which has been banned in many countries.

Therefore, the demand for paper lunch boxes has increased greatly in the market, and many manufacturers have continuously developed paper lunch boxes of various structures. The structure and manufacturing method of the conventional paper lunch box are as shown in FIGS. 1A and 1B, and the paperboard is cut into a predetermined shape of a lunch box paper 60 having a box bottom 61 and a box side board 62. The four-end corner flap 63 and the lid body 64 are integrally connected to each other, and are thermocompression-bonded by a molding die to bond the four-end corner flaps 63 to each other to form a three-dimensional paper system. Lunch box 60A.

However, the traditional paper box 60A structure, the biggest problem lies in its hot-pressed type of box body 61a or cover body 64a, because the cardboard is not extensible, it can not be like plastic or styrofoam lunch box, can The reinforcing ribs or surfaces having irregularities are integrally formed, so that the formed paper lunch box 60A has a relatively insufficient structural strength, and is easily deformed when the food is placed; further, the combination of the four-corner flaps 63 is overlapped. The surface is adhered by a colloid, but the structure of the three-dimensional paper lunch box 60A formed by the bonding method is relatively weak, and if the two opposite sides of the frame are slightly applied, the flap 63 of the end corner is easily torn. Or damage, as a result, when the soup is contained in the lunch box, it is easy to leak from the fitting. Therefore, there is still room for improvement.

The main object of the present invention is to provide an integrally formed shower box which can solve the problems of the prior art, so that the paper lunch box has sufficient structural strength when integrally formed, and can replace the meal made by the non-environmental materials. Box to enhance the safety of consumers' food safety.

Another object of the present invention is to provide an integrally formed shower box, which uses steam to make the paper box embryo malleable, and when the lunch box is formed, it is judged whether it is a good product by humidity, and has the quality and use of the molded lunch box. The effect of safety.

In order to achieve the above object, the steps employed in the present invention comprise: a) providing a single layer of coated paper coated with a layer of polypropylene (PE) on a first surface of a base paper. a layer, and the second surface of the base paper is exposed; b). The single-layer coated paper is cut and indented into a developed lunch box embryo having a box body and a lid body; c). a steam chamber, the cut-out meal box paper embryo is sent to the steam chamber, and the second surface of the base paper without the coating layer absorbs the vapor of the steam chamber to soften the paper box embryo; d). a box device, the softened lunch box paper blank is folded into a prototype of the box body and the cover body, and each of the four end corners has a joint surface with paper embryos overlapping each other; e) providing a set of upper and lower a mold, the bottom surface of the upper and lower molds are respectively provided with a concavo-convex shape having a predetermined depth, and the upper and lower molds are subjected to thermal compression bonding of the casing and the lid body at 120 ° C to 160 ° C, and each of the four a joint surface of the end-angle paper embryos superposed on each other, which is glued and fixed by a hot-melt coating layer; f) controlling the hot pressing time of the upper and lower molds, so that the When the body and the cover body are formed, the surface is simultaneously extended into a reinforcing surface having irregularities; and g). The integrally formed shower box is formed, and after the mold is removed, the humidity of the integrally formed shower box is detected, and it is judged according to the judgment For good or bad products.

In the above step b), the meal box of the expanded box comprises: a box body having a box bottom and a four-sided box edge connecting the periphery of the box bottom, the bottom edge of the four-sided box edge and the bottom of the box The connecting portion is a crease line, and the adjacent sides of the four-sided box edge are formed into four cutting lines at an oblique angle, so that the four end corners can be stacked into a circular arc angle; a cover body having a cover surface and a four-sided cover edge connecting the periphery of the cover body, the bottom edge of the four-sided cover edge and the periphery of the cover surface are crease lines, and the adjacent sides of the four-sided cover edge are formed into four cutting lines at an oblique angle, so that The four end corners can be stacked into a circular arc angle; and the box body and the rear side of the cover are connected by a crease line.

According to the pre-extrusion method of the present invention, a body-formed laminating lunch box structure comprises: a lunch box paper embryo, which is cut and indented by a single-layer laminating paper to have a box body and a cover body, the single sheet The layered coated paper is coated on a first surface of a base paper with a layer of polypropylene (PE) and the second surface of the base paper is exposed; the box has a bottom and from the box The bottom edge is folded upwardly into the press-formed box edge; the cover body has a cover surface and a cover edge folded downwardly from the periphery of the cover surface, and the cover body is connected with the rear side of the box body a slinging portion for causing the cover body to be opened or closed on the box body; wherein: the joint faces of the four end angles of the paper embryos overlap each other The heat fusion is glued and fixed; and the cover surface of the cover body and the bottom of the box body are integrally formed and stretched to have a plurality of concave-convex strengthening surfaces.

By means of the above-mentioned technical features, the invention makes the paper box embryos have the malleability by steam, so that the paper lunch box forms the reinforcing surface of the concave and convex at the same time, and has sufficient structural strength; further, when the lunch box is formed, The residual humidity is used to judge whether it is a good product, ensure the factory quality of the molded lunch box, and the safety of the consumer, effectively solving the problems of the prior art.

First, referring to FIG. 2 to FIG. 8 , the method for manufacturing the integrally formed shower box of the present invention comprises the steps shown in the flow chart of FIG. 2 :

Step a). Providing a single-layer coated paper 10, as shown in FIG. 3 and FIG. 4, the single-layer coated paper 10 is coated with a layer of polypropylene (PE) on a first surface 11a of a base paper 11. The film layer 12 is made to have a second surface 11b of the base paper 11 in a bare shape. In this embodiment, the second surface 11b is exposed in a main form as a subsequent process for adsorbing vapor to soften it.

Step b). Cutting and indenting the single-layer coated paper 10 into a developed lunch box 40 having a casing 20 and a cover 30; as shown in FIG. 3, in the embodiment, the lunch box The paper blank 40 comprises: a box body 20 having a box bottom 21 and a four-sided box edge 22 connecting the periphery of the box bottom 21, the bottom edge of the four side box edge 22 and the bottom of the box bottom 21 being creased Line 23, and the adjacent sides of the four-sided box edge 22 are formed into four cutting lines 24 at an oblique angle, so that the four end angles 25 can be stacked into a circular arc angle 25a (this portion is shown in Figure 7); The body 30 has a cover surface 31 and a four-sided cover edge 32 connecting the periphery of the cover surface 31. The bottom edge of the four-sided cover edge 32 and the periphery of the cover surface 31 are crease lines 33, and the four-sided cover edge The adjacent edges of 32 are formed into four cutting lines 34 at an oblique angle, so that the four end angles 35 can be stacked into a circular arc angle 35a (as shown in FIG. 7); and the casing 20 and the rear of the cover 30 The sidelines are connected crease lines 41. Moreover, one side of the cover body 30 is provided with a tongue 42. The corresponding side of the box body 20 is provided with a slit 43 so that it can be positioned in the same nest when it is closed.

Step c). Providing a vapor chamber (not shown), and feeding the cut-out meal box embryo 40 into the steam chamber, as shown in FIG. 4, the base paper 11 having no second surface of the coating layer 12. 11b absorbs the vapor of the vapor chamber (indicated by the arrow), so that the lunch box 40 is softened; as for the coating layer 12 of the first surface 11a, the vapor layer 12 is unable to absorb the vapor, and the coating layer 12 is contacted with food after being formed in the lunch box. The inner edge surface, that is, the lunch box paper 40 of the present invention must be defined as a single layer of coated paper 10.

Step d). As shown in FIG. 4, a folding box and a hot press forming apparatus 50 are provided, and the softened lunch box paper blank 40 is folded into the box body 20 and the prototype 40a of the lid body 30 (as shown by the dotted line in FIG. 5). In the present embodiment, the folding box and the hot press forming apparatus 50 are merely an example for explaining a possible embodiment of folding the lunch box blank 40 into the box body 20 and the cover body 30, which is a previous embodiment. The technology (Prior Art), which is not the patent of the present invention, is not described here. Since the four end angles 25, 35 of the present invention have the cutting line 24, the folding box device can cause the four end angles 25, 35 to have the overlapping of the paper embryos through the folding box and the thermoforming apparatus 50. As shown in FIG. 7 , FIG. 6 is a schematic view showing that the casing 20 has been folded and the cover 30 has not been folded. However, during the actual folding process, the casing 20 and the cover 30 can be folded into the folding box. And the hot press molding apparatus 50 is simultaneously performed.

Step e). Providing a set of upper and lower dies 51, 52, the bottom surfaces of the upper and lower dies 51, 52 are respectively provided with concave and convex bodies 511, 521 of a predetermined depth, and in the present embodiment, the upper and lower dies 51, 52 There is an electric heating element (not shown) to have a predetermined temperature. The case body 20 and the lid body 30 are thermocompression-bonded at 120 ° C to 160 ° C by the upper and lower molds 51 and 52, and the four end angles 25 and 35 are overlapped with each other. The faces 25b, 35b are glued and fixed by the melted coating layer 12. Therefore, the present invention does not need to use adhesive to fix the overlapping end angles, but directly uses the coating layer 12 to produce viscosity at 120 ° C to 160 ° C, so that the bonding faces 25 b, 35 b are The upper and lower molds 51, 52 are glued and fixed under thermal compression. However, the temperature portion where the upper and lower molds 51, 52 are thermocompression may exceed 160 ° C, otherwise the coating layer 12 may be melted and destroyed.

Step f). Controlling the hot pressing time of the upper and lower molds 51, 52, and when the casing 20 and the cover 30 are formed, the surface of the casing 20 and the cover 30 are simultaneously extended into the reinforcing surfaces 26 and 36 having irregularities; When the casing 20 and the lid body 30 are hot-pressed, the horizontal flange faces 27 and 37 are formed on the peripheral edges as shown in FIG.

Step g). Forming a one-piece laminating lunch box 40A, and then demoulding the integrally formed shower box 40A, and detecting the humidity of the integrally formed shower box 40A, thereby judging the integrally formed shower box 40A For good or bad products. This is an important technical feature of the present invention, because the lunch box paper 40 having steam, after the hot press forming, if the humidity is higher than a preset value, the joint faces 25b of the four end angles 25, 35 overlap each other, 35b, it will not be strong, it is easy to loosen when it is hot food, so it must be regarded as a defective product, but such a defective product cannot be detected by human or other means, and the actual test results of the present invention are integrally formed into a film. The humidity of the lunch box 40A is based on the fact that the accuracy of the meal box is high or not, so that the quality of the product can be ensured.

Therefore, the present invention is a body-formed shower box 40A according to the above-mentioned technical means, and the structure comprises: a box body 20 having a box bottom 21 and a box folded upward from the periphery of the box bottom 21 a cover body 30 having a cover surface 31 and a cover edge 32 folded downwardly from the periphery of the cover surface 31, and the cover body 20 is connected to the rear side of the case body 30. a portion 41a for causing the cover 30 to be opened or closed by the twisting portion 41a on the casing 20; wherein: the joint faces 25b of the four end angles 25, 35 overlap each other, 35b, the laminating layer 12 is thermally fused to be fixed by gluing; and the surface of the cover 30 and the casing 20 is integrally formed and stretched to have a plurality of concavo-convex-reinforced surfaces 26, 36. Further, the cover 30 and the four end angles of the casing 20 are formed into circular arc angles 25a and 35a.

By means of the above-mentioned technical features, the present invention utilizes steam to make the lunch box 40 of the lunch box malleable, so that the reinforcing surface 26, 36 of the concave and convex portions is formed at the same time when the lunch box is integrally formed, and has sufficient structural strength; Judging whether it is a good product by its residual humidity, ensuring the factory quality of the molded lunch box, and the safety of the consumer, effectively solving the problems of the prior art.

In summary, the technical means disclosed in the present invention have the invention patents such as "novelty", "progressiveness" and "available for industrial use", and pray for the patent to encourage the invention. German sense.

The drawings and the descriptions of the present invention are merely preferred embodiments of the present invention, and those skilled in the art, which are subject to the spirit of the present invention, should be included in the scope of the patent application.

10‧‧‧Single layer coated paper
11‧‧‧Original paper
11a‧‧‧ first surface
11b‧‧‧ second surface
12‧‧‧Layer layer
20‧‧‧Box
21‧‧‧ box bottom
22‧‧‧ box side
23, 33‧‧‧ crease line
24, 34‧‧ ‧ cutting line
25, 35‧‧‧ end angle
25a, 35a‧‧‧ arc angle
25b, 35b‧‧‧ joint surface
26, 36‧‧‧ embossed surface
27, 37‧‧‧Flange
30‧‧‧ cover
31‧‧‧ Cover
32‧‧‧ Cover
40‧‧‧ lunch box paper embryo
40A‧‧‧Integrated Laminating Lunch Box
41‧‧‧ crease line
41a‧‧‧掀转部
42‧‧‧ tongue
43‧‧‧ slitting
50‧‧‧Folding box and thermoforming equipment
51‧‧‧Upper mold
52‧‧‧ Lower mold
511, 521‧‧‧ embossed body

1A and 1B are schematic views showing the structure of a conventional paper lunch box. 2 is a flow chart of the production of the present invention. Fig. 3 is a schematic view showing the development of the paper box embryo of the present invention. Fig. 4 is a schematic view showing the surface of the lunch box of the present invention moistened with steam. Fig. 5 is a schematic view showing an embodiment of the folding box and the hot press forming apparatus of the present invention. Fig. 6 is a schematic view showing the process of initially folding the paper box embryo of the present invention into a box body and a lid body. Fig. 7 is a perspective view showing the appearance of the thermoformed one-piece laminating lunch box of the present invention. Fig. 8 is a reference diagram of the state of use of the integrally formed shower box of the present invention.

20‧‧‧Box

21‧‧‧ box bottom

22‧‧‧ box side

23, 33‧‧‧ crease line

25, 35‧‧‧ end angle

25a, 35a‧‧‧ arc angle

25b, 35b‧‧‧ joint surface

26, 36‧‧‧ embossed surface

27, 37‧‧‧Flange

30‧‧‧ cover

31‧‧‧ Cover

32‧‧‧ Cover

40A‧‧‧Integrated Laminating Lunch Box

41‧‧‧ crease line

41a‧‧‧掀转部

42‧‧‧ tongue

43‧‧‧ slitting

Claims (6)

The invention relates to a method for integrally forming a coated lunch box, the steps comprising: a) providing a single layer of coated paper, which is coated with a layer of polypropylene (PE) on a first surface of a base paper. a layer, and the second surface of the base paper is exposed; b). The single-layer coated paper is cut and indented into a developed lunch box embryo having a box body and a lid body; c). a steam chamber, the cut-out meal box paper embryo is sent to the steam chamber, and the second surface of the base paper without the coating layer absorbs the vapor of the steam chamber to soften the paper box embryo; d). a box device, the softened lunch box paper blank is folded into a prototype of the box body and the cover body, and each of the four end corners has a joint surface with paper embryos overlapping each other; e) providing a set of upper and lower a mold, the surface of the upper and lower molds are respectively provided with a concavo-convex shape of a predetermined depth, and the upper and lower molds are thermocompression-bonded to the box body and the lid body at 120 ° C to 160 ° C, and each of the four a joint surface of the end-angle paper embryos superposed on each other, which is glued and fixed by a hot-melt coating layer; f) controlling the hot pressing time of the upper and lower molds to make the box When the body and the cover body are formed, the surface is simultaneously extended into a reinforcing surface having irregularities; and g). The integrally formed shower box is formed, and after the mold is removed, the humidity of the integrally formed shower box is detected, and it is judged according to the judgment For good or bad products. The method for preparing a body-forming rinsing lunch box according to the first aspect of the invention, wherein the step (b). the unfolded lunch box comprises: a box having a box bottom and connecting the bottom of the box bottom a four-sided box edge, the bottom edge of the four-sided box edge and the bottom of the box are crease lines, and the adjacent sides of the four-sided box edge are formed into four cutting lines at an oblique angle, so that the four end corners can be stacked The composite type has a circular arc angle; a cover body having a cover surface and a four-sided cover edge connecting the periphery of the cover surface, the bottom edge of the four-sided cover edge and the periphery of the cover surface are crease lines, and the four sides The adjacent edges of the cover edge are formed into four cutting lines at an oblique angle, so that the four end corners can be stacked into a circular arc angle; and the box body and the rear side of the cover body are connected with a crease line. The method according to claim 2, wherein the box body and the lid body are formed by a horizontal flange surface at the peripheral edge. A body-formed laminating lunch box structure made by the method described in claim 1 of the patent application, comprising: a lunch box paper embryo, which is cut and indented by a single layer of coated paper to have a box body And a cover body, the single-layer coated paper is coated on a first surface of a base paper with a coating layer of polypropylene (PE), and the second surface of the base paper is exposed; the box has a box bottom and a folding edge of the press-type type from the periphery of the bottom of the box; the cover body has a cover surface and a cover edge folded downward from the periphery of the cover surface, and the cover body and the box body The rear side is a connected turn portion, so that the cover body can be opened or closed on the box body by the twisting portion; and the joint surface of the four end angle paper embryos overlap each other; The laminating layer is heat-melted to be gel-fixed and fixed; and the cover surface of the cover body and the bottom of the box body are integrally formed and stretched to have a plurality of concave-convex reinforcing surfaces. The one-piece shaped rinsing lunch box structure according to the fourth aspect of the invention, wherein the box of the paper box embryo comprises: a four-sided box edge connecting the periphery of the box bottom, the bottom edge of the four-sided box edge and the box The bottom joint is a crease line, and the adjacent sides of the four-sided box edge are formed into four cutting lines at an oblique angle, so that the four end corners can be stacked into a circular arc angle; and the cover of the lunch box The body comprises: a four-sided cover edge connecting the periphery of the cover surface, the bottom edge of the four-sided cover edge and the periphery of the cover surface are crease lines, and the adjacent sides of the four-sided cover edge are cut at four oblique angles The line is such that the four end corners can be stacked into a circular arc angle; and the box body is connected with the crease line of the rear side of the cover body. The body-formed coated lunch box structure according to claim 5, wherein the box body and the lid body are formed by a horizontal flange surface at the peripheral edge.