CN109720684B - Box blank of buffer box - Google Patents

Abstract

The invention discloses a buffer box blank, which is composed of a buffer bottom box blank and two buffer bracket blanks, wherein the first lower folding line and the second lower folding line are folding lines for bending to the bottom of the buffer bottom box blank, The first upper fold line is a fold line used for bending to the upper surface of the buffer bottom box blank; the edge of the rectangular cardboard parallel to its width direction is the first width edge, and two first width edges are cut from each of the two first width edges and are perpendicular to the first width. The first cutting line is arranged at intervals on the edge, and the other end of the first cutting line is located at the first lower fold line near the edge of the first width of the corresponding side. The left and right parts of the object are tightened to play a fixed role to protect the surface of the object from scratches due to transportation collisions. There are buffer spaces on all six sides of the buffer structure, which can protect the contents during transportation.

Description

A buffer box blank

technical field

The invention belongs to the technical field of packaging, and in particular relates to a buffer box blank.

Background technique

At present, the paper packaging boxes used in the market are all made of corrugated paper, because corrugated paper has a strong buffering effect, which can effectively avoid the phenomenon of damage to the appearance of the items in the box caused by the deformation of the box body. However, when making corrugated boxes, it is necessary to carry out five processes of printing, surface treatment, corrugating, laminating, and die-cutting. The paper is made into box blanks in batches, and then individually bonded and formed. The process is complicated, the loss is large, the cost is high, low efficiency.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the purpose of the present invention is to provide a buffer box blank.

For this reason, the technical scheme of the present invention is as follows:

A buffer box blank is composed of a buffer bottom box blank and two buffer bracket blanks, wherein the buffer bottom box blank is a rectangular cardboard with a width slightly smaller than the front plate and is symmetrical up and down, and the rectangular cardboard is symmetrical. A first lower fold line, a second lower fold line, a first upper fold line, a first upper fold line, a second lower fold line and a first lower fold line are arranged at intervals along the length direction of the rectangular cardboard, the first lower fold line and the first lower fold line. The second lower fold line is a fold line used to bend below the buffer bottom box blank, the first upper fold line is a fold line used to bend to the upper side of the buffer bottom box blank; the rectangular cardboard is parallel to its width direction. The edge is a first width edge, and two first cutting lines perpendicular to the first width edge and spaced apart are cut from each of the two first width edges, and the other end of the first cutting line is located close to the corresponding side The first lower fold line at the edge of the first width; from each of the second lower fold lines, there are 2 second cut lines arranged at intervals and perpendicular to the second lower fold line, and the other end of the second lower fold line is located at between the first lower fold line and the first width edge on the corresponding side; the first cutting line and the second cutting line are symmetrically arranged along the transverse centerline and the longitudinal centerline of the rectangular cardboard;

The two buffer support box blanks have the same structure and are both strip-shaped rectangular cardboards, and a third lower folding line, a fourth lower folding line, a fifth lower folding line and a sixth lower folding line are sequentially pressed on each of the strip-shaped rectangular cardboards, The third lower fold line, the fourth lower fold line, the fifth lower fold line and the sixth lower fold line are all fold lines for bending below the strip-shaped rectangular cardboard;

The edge of the strip-shaped rectangular cardboard parallel to its width direction is the second width edge, and a rectangular third concave opening is formed on the second width edge close to the third lower fold line, and the third concave opening is on opposite sides. A buffer sheet is respectively connected to the edges of the lower fold line; a rectangular fourth concave opening is formed on the edge of the second width close to the sixth lower fold line; a fourth lower fold line is cut to form a a special-shaped cutting line, the shape of the special-shaped cutting line is the same as the line shape on the cross section of the structure formed after the buffer bottom box blank is folded;

Wherein, the width of the third concave opening and the fourth concave opening are respectively the same as the distance between the two first upper fold lines; the edge of the rectangular cardboard parallel to its length direction is the first length edge, and the first length edge is the first length edge. The distance between the fifth lower fold line and the sixth lower fold line is slightly smaller than the distance between the first length edge and the first cutting line.

In the above technical solution, the special-shaped cutting line is formed with two second rectangular ridges and a first rectangular ridge located between the two second rectangular ridges, the first rectangular ridge and the two second rectangular ridges are formed. The two rectangular protruding strips mesh with each other to form a plane.

The method for folding a buffer box blank into a buffer box as described above includes the following steps:

(1) The buffer bracket blanks are located on opposite sides of the buffer bottom box blank respectively and the lower surface of each buffer bracket blank is facing the buffer bottom box blank, so that the first upper fold line is perpendicular to the buffer bracket blank, and the second width edge is parallel to the plane where the buffer bottom box blank is located;

(2) Bend 90° to the bottom of the rectangular cardboard along the first lower fold line and the second lower fold line of the rectangular cardboard, and bend 90° to the upper side of the rectangular cardboard along the first upper fold line to obtain a linear shape on the cross section. A buffer bottom in the same shape as the profiled cutting line;

(3) Put the special-shaped cutting lines of the two buffer support box blanks on the two ends of the buffer bottom respectively, so that the buffer bottom box blanks are bent along the shape of the special-shaped cutting lines in the special-shaped cutting lines. fold;

(4) Perform the following operations on both of the two buffer bracket blanks: bend 90° to the bottom of the buffer bracket blank along the fourth lower fold line, the fifth lower fold line and the sixth lower fold line, and bend the buffer bracket blanks by 90° along the fourth lower fold line, the fifth lower fold line and the sixth lower fold line. The three lower fold lines are bent 100-120° below the buffer bracket blank; insert the ends of the buffer bracket blank located on both sides of the third recessed opening into the second cutting line close to the buffer bracket blank respectively in; insert the ends of the buffer support box blanks located on both sides of the fourth recessed opening into the first cutting lines adjacent to the buffer support box blanks respectively.

In the above technical solution, in the step (3), when the first lower fold line and the second lower fold line are bent 90° below the rectangular cardboard, and the first upper fold line is bent to the upper side of the rectangular cardboard After 90°, the buffer bottom forms two second grooves with downward openings and a first groove with upward openings located between the two second grooves.

In the above technical solution, when the special-shaped cutting lines of the two buffer bracket blanks are respectively sleeved on one end of the buffer bottom, the first rectangular protruding strip is located in the first groove and is connected with the first rectangular ridge. The inner wall of a groove is compatible, and the second rectangular protruding strip is located in the second groove and is compatible with the inner wall of the second groove.

Compared with the prior art, the buffer box folded from the buffer box blank of the present invention is easy to assemble, and the left and right parts of the contents are tightened by structural molding, which plays a fixed role and protects the surface of the object from being scratched due to transportation collision. There are buffer spaces on all six sides of the buffer structure, which can protect the contents during transportation.

Description of drawings

Fig. 1 is the structural representation of the outer box blank of the present invention;

Fig. 2 is the structural representation of the outer box of the present invention under the closed state;

Fig. 3 is the structural representation of the outer box of the present invention under the display state;

4 is a schematic structural diagram of the outer box of the invention being converted from a closed state to a display state;

5 is a schematic structural diagram of a buffer bottom box blank of the present invention;

6 is a schematic structural diagram of a buffer support box blank of the present invention;

7 is a schematic structural diagram of the buffer box folded into the buffer box blank of the present invention (in use state);

8 is a schematic structural diagram of a buffer box folded from a buffer box blank of the present invention;

9 is a schematic structural diagram of the buffer box folded from the buffer box blank of the present invention (in use state);

FIG. 10 is a schematic structural diagram of the buffer box folded from the buffer box blank of the present invention.

Wherein, 1 is the first side plate, 2 is the first auxiliary lock hole, 3 is the second auxiliary lock hole, 4 is the bottom plate, 5 is the lower lock hole, 6 is the flap, 7 is the easy-tear dotted line, and 8 is the upper lock Holes, 9 is the cover plate, 10 is the dust-proof insert plate, 11 is the side connecting plate, 12 is the locking tongue, 13 is the front side plate, 14 is the rear plate, 15 is the second side plate, 16 is the front plate, 17 is the connection Fold line, 18 is the first lower fold line, 19 is the second lower fold line, 20 is the first upper fold line, 21 is the first length edge, 22 is the first width edge, 23 is the second cutting line, and 24 is the first cutting line , 25 is the buffer sheet, 26 is the third concave opening, 27 is the third lower folding line, 28 is the fourth lower folding line, 29 is the special-shaped cutting line, 30 is the fifth lower folding line, 31 is the sixth lower folding line, and 32 is the first lower folding line. Four concave openings, 33 is the first rectangular convex strip, 34 is the second rectangular convex strip, 35 is the second width edge, 36 is the second length edge, 37 is the second concave opening, 38 is the first concave opening, and 39 is the second concave opening. The first groove, 40 is the second groove, 41 is the outer box blank, 42 is the buffer box blank, 42-1 is the buffer bottom box blank, and 42-2 is the buffer bracket blank.

Detailed ways

In the technical solution of the present invention, the Nth lower broken lines are all straight lines.

The box blank of the packaging box with display function of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in the accompanying drawings 1 to 10, it includes: an outer box blank 41 and a buffer box blank 42, the outer box blank 41 is folded to form a rectangular outer box, and the buffer box blank 42 is folded and placed in the outer box; The box blank 41 includes: a first side panel 1, a front panel 16, a second side panel 15 and a rear panel 14 connected in sequence along the transverse direction, and a first side panel 1 or the rear panel 14 is connected with a first side panel for connecting the first side panel. The flaps 6 of the panel 1 and the rear panel 14, so that the first side panel 1, the front panel 16, the second side panel 15 and the rear panel 14 can surround the side of the outer box; The bottom edges of the second side panel 15 and the rear panel 14 are respectively connected with a bottom plate 4, and the four bottom plates 4 can be assembled and locked with each other (plug-in) to form a lock bottom of the outer box.

A first concave opening 38 is formed at the upper end of the front plate 16 , the shape of the first concave opening 38 is a rectangle or an inverted trapezoid, and the bottom edge of the first concave opening 38 is located on the lateral centerline of the front plate 16 ; The top edge is connected with a cover plate 9 used as the top surface of the outer box, a handle can be installed on the cover plate 9, and a front side plate 13 is connected to the top edge of the cover plate 9, and the height of the front side plate 13 is equal to the first recessed opening 38 height, one side connecting plate 11 is connected to the lateral sides of the front side plate 13 respectively, and the width of each side connecting plate 11 is slightly larger than the width of the first side plate 1 and the second side plate 15 (slightly larger by 2 Paper thickness), the edges of the two side connecting plates 11 away from each other are connected with a locking tongue 12 respectively.

An upper locking hole 8 is formed on both lateral sides of the rear plate 14, and a lower locking hole 5 is formed on the rear plate 14 below each upper locking hole 8, so that the lock tongue 12 can be inserted into the upper locking hole 8 or the lower locking hole 5. In the locking hole 5, the distance between the top end of the upper locking hole 8 and the top edge of the rear plate 14 and the distance between the bottom end of the lower locking hole 5 and the bottom edge of the rear plate 14 are the same as the bottom edge and the front side of the locking tongue 12. The distance between the extension lines of the bottom edge of the board 13 is the same. Preferably, when the upper locking hole and the lower locking hole are located between the flap and the rear plate, a part of the first side plate may overlap with the upper locking hole and the lower locking hole, at this time, the first side plate and the upper locking hole A first auxiliary lock hole 2 and a second auxiliary lock hole 3 are sequentially formed at the overlapping position of the hole and the lower lock hole.

A working line having the same shape as the first concave opening 38 and an opposite position is formed on the rear plate 14 . The easy-tear dotted line adopts an embedded tearing tape, such as the plastic tape on the folder currently used by SF Express for mailing. When the folder is opened, the cardboard at the location of the plastic tape can be broken by tearing the plastic tape.

The buffer box blank 42 is composed of a buffer bottom box blank 42-1 and two buffer bracket blanks 42-2, wherein,

The buffer bottom box blank 42-1 is a rectangular cardboard with a width slightly smaller than the front plate 16 and is symmetrical up and down. The rectangular cardboard is provided with a first lower fold line 18, a second lower fold line 19, a first lower fold line 18, a second lower fold line 19, An upper fold line 20, a first upper fold line 20, a second lower fold line 19 and a first lower fold line 18. The first lower fold line 18 and the second lower fold line 19 are fold lines for bending below the buffer bottom box blank 42-1 , the first upper fold line 20 is a fold line for bending to the buffer bottom box blank 42-1; the edge of the rectangular cardboard parallel to its width direction is the first width edge 22, and each of the two first width edges 22 is cut with 2 A first cutting line 24 perpendicular to the first width edge 22 and spaced apart, the other end of the first cutting line 24 is located near the first lower fold line 18 of the first width edge 22 on the corresponding side; from each second lower fold line 19 are each cut with 2 second cutting lines 23 arranged at intervals and perpendicular to the second lower fold line 19, and the other end of the second cutting line 23 is located between the first lower fold line 18 and the first width edge 22 on the corresponding side; The first cutting line 24 and the second cutting line 23 are respectively arranged symmetrically along the transverse center line and the longitudinal center line of the rectangular cardboard;

The two buffer bracket blanks 42-2 have the same structure and are both strip-shaped rectangular cardboards, and the third lower folding line 27, the fourth lower folding line 28, the fifth lower folding line 30 and the sixth lower folding line 27 are pressed sequentially on each strip-shaped rectangular cardboard. The lower fold line 31, the third lower fold line 27, the fourth lower fold line 28, the fifth lower fold line 30 and the sixth lower fold line 31 are all fold lines for bending under the strip-shaped rectangular cardboard;

The edge of the strip-shaped rectangular cardboard parallel to its width direction is the second width edge 35, and a rectangular third concave opening 26 is formed on the second width edge 35 close to the third lower fold line 27. The edges are respectively connected with a buffer piece 25 , and the length of the buffer piece 25 is smaller than the depth of the third concave opening 26 and is close to the bottom of the third concave opening 26 . The edge of the strip-shaped rectangular cardboard parallel to its length direction is the second length edge 36 .

A rectangular fourth concave opening 32 is formed on the second width edge 35 close to the sixth lower fold line 31; a special-shaped cutting line 29 is formed between the fourth lower fold line 28 and the fifth lower fold line 30, and the special-shaped cutting line 29 The shape is the same as the line shape on the cross section of the structure formed after the buffer bottom box blank 42-1 is folded; as shown in FIG. The first rectangular ridges 33 between the ridges 34, the first rectangular ridges 33 and the two second rectangular ridges 34 mesh with each other to form a plane.

The widths of the third concave opening 26 and the fourth concave opening 32 are respectively the same as the distance between the two first upper fold lines 20; the edge of the rectangular cardboard parallel to its length direction is the first length edge 21, and the fifth lower fold line 30 The distance from the sixth lower folding line 31 is slightly smaller than the distance between the first length edge 21 and the first cutting line 24 .

Preferably, a dust-proof plug board 10 is connected to the bottom edge of each side connecting board 11 .

The method for folding an outer box blank into an outer box in a closed state includes the following steps:

a) Adhere the first side panel 1 and the rear panel 14 through the flaps 6, and assemble and lock the four bottom panels 4, so that the first side panel 1, the front panel 16, the second side panel 15, the rear panel 14 and 4 bottom plates 4 form an open outer box;

b) Bend the cover plate 9 by 90° along the connecting line between the cover plate 9 and the rear plate 14, so that the cover plate 9 forms the top surface of the outer box;

c) Bend the front side plate 13 along the connecting line between the front side plate 13 and the cover plate 9 to the bottom surface of the outer box by 90°, and fold the two side connecting plates 11 along the side connecting plate 11 and the front side plate 13 The connecting line between them is bent at 90°, so that the two side connecting plates 11 are in close contact with the first side plate 1 or the second side plate 15 of the corresponding side respectively; the two locking tongues 12 are connected to the side along the locking tongue 12 The connecting line between the plates 11 is bent at 90°, and the two locking tongues 12 are inserted into the two upper locking holes 8 respectively.

The method for folding an outer box blank into an outer box in a display state includes the following steps:

1) Adhere the first side panel 1 and the rear panel 14 through the flaps 6, and assemble and lock the four bottom panels 4, so that the first side panel 1, the front panel 16, the second side panel 15, the rear panel 14 and 4 bottom plates 4 form an open outer box;

2) Disconnect the easy-tear dotted line 7, and bend the rear panel 14 above the connection fold line 17 backwards (as shown in FIG. 4(k) ), so that the rear panel above the connection fold line 17 14 is close to the rear panel 14 located below the connecting fold line 17 (as shown in FIG. 4(l)), and the cover panel 9 is bent along the connection line between the cover panel 9 and the rear panel 14, so that the cover panel 9 is tightly Paste the bottom surface of the outer box (as shown in Figure 4(m));

3) Bend the front side panel 13 90° along the connecting line between the front side panel 13 and the cover panel 9, so that the front side is close to the front panel 16 (as shown in FIG. 4(n)), and 2 Each side connecting plate 11 is bent 90° along the connecting line between the side connecting plate 11 and the front side plate 13, so that the two side connecting plates 11 are in close contact with the first side plate 1 or the second side plate on the corresponding side respectively. 15 (as shown in Fig. 4(p)); Bend the two locking tongues 12 by 90° along the connecting line between the locking tongue 12 and the side connecting plate 11, and insert the two locking tongues 12 into the two lower locks respectively Hole 5 (as shown in Figure 4(q)).

A method for folding a buffer box blank into a buffer box includes the following steps:

(1) The buffer bracket blanks 42-2 are located on opposite sides of the buffer bottom blank 42-1 respectively, and the lower surface of each buffer bracket blank 42-2 faces the buffer bottom blank 42-1, so that the first upper The folding line 20 is perpendicular to the buffer support box blank 42-2, and the second width edge 35 is parallel to the plane where the buffer bottom box blank 42-1 is located;

(2) Bend 90° to the bottom of the rectangular cardboard along the first lower fold line 18 and the second lower fold line 19 of the rectangular cardboard, and bend 90° to the upper side of the rectangular cardboard along the first upper fold line 20 to obtain the linear and Buffer bottom with the same shape as the special-shaped cutting line 29;

(3) The special-shaped cutting lines 29 of the two buffer support box blanks 42-2 are respectively sleeved on both ends of the buffer bottom, so that the buffer bottom box blank 42-1 is in the special-shaped cutting line 29 along the shape of the special-shaped cutting line 29 Bending; in step i), after bending 90° to the bottom of the rectangular cardboard along the first lower folding line 18 and the second lower folding line 19 and bending 90° to the top of the rectangular cardboard along the first upper folding line 20, the buffer bottom is formed The two second grooves 40 with downward openings and the first grooves 39 with upward openings located between the two second grooves 40, when the special-shaped cutting lines 29 of the two buffer bracket blanks 42-2 are respectively When sleeved on one end of a buffer bottom, the first rectangular convex strip 33 is located in the first groove 39 and is compatible with the inner wall of the first groove 39, and the second rectangular convex strip 34 is located in the second groove 40 and is in line with the inner wall of the first groove 39. The inner wall of the second groove 40 is suitable, and the first rectangular ridge 33 and the second rectangular ridge 34 can support the first groove 39 and the second groove 40 in sequence.

(4) The following operations are performed for both the two buffer bracket blanks 42-2: along the fourth lower fold line 28, the fifth lower fold line 30 and the sixth lower fold line 31 to bend 90° to the bottom of the buffer bracket blank 42-2 , bend 100-120° to the bottom of the buffer bracket blank 42-2 along the third lower folding line 27; insert the ends of the buffer bracket blank 42-2 on both sides of the third recessed opening 26 into the buffer bracket box respectively In the second cutting line 23 close to the blank 42-2; insert the ends of the buffer support box blank 42-2 located on both sides of the fourth recessed opening 32 into the first cutting line 24 adjacent to the buffer support box blank 42-2 respectively middle.

The use method of folding the buffer box blank into a buffer box, the bottom of the object is placed in the first groove, the two sides of the object are embedded in the third concave opening, and the existence of the buffer sheet can further clamp the object.

After the outer box and the buffer box of the present invention are combined and formed, the shape is a complete briefcase; after opening, the front cover is folded, the product is in sight, and the tongue is inserted into the rear plate, which can play the role of sales display; consumers buy Afterwards, fold back the box cover, insert the tongue into the side hole, and then lift and carry. During the display, the tubular cubic display is used instead of the previous flat display, which saves the display space and expands the scope of the product attention space.

The outer box can integrate the functions of transportation and display. If the corners and corners are deformed or dirty during transportation, the cover is folded outwards during display, and the inner cardboard can be used to cover the damage and dirt on the outer cardboard of the carton.

The buffer box is easy to assemble, and the left and right parts of the contents are tightened through the structural molding, which plays a fixed role and protects the surface of the object from being scratched due to transportation collisions. There are buffer spaces on all six sides of the buffer structure, which can protect the contents during transportation.

The present invention has been exemplarily described above. It should be noted that, without departing from the core of the present invention, any simple deformation, modification, or other equivalent replacements that can be performed by those skilled in the art without any creative effort fall into the scope of the present invention. the scope of protection of the invention.

Claims (6)

1. A box blank of a buffer box is folded and placed in an outer box; the outer box blank (41) comprises: a first side plate (1), a front plate (16), a second side plate (15) and a rear plate (14) which are connected in sequence along the transverse direction, it is characterized in that the box blank of the buffer box consists of a box blank (42-1) of a buffer bottom and 2 box blanks (42-2) of buffer supports, wherein the buffer bottom box blank (42-1) is a rectangular paperboard with the width slightly smaller than the front plate (16) and is symmetrical up and down, a first lower folding line (18), a second lower folding line (19), a first upper folding line (20), a second lower folding line (19) and a first lower folding line (18) are sequentially arranged on the rectangular paperboard at intervals along the length direction of the rectangular paperboard, the first lower folding line (18) and the second lower folding line (19) are folding lines used for bending towards the lower part of the buffer bottom box blank (42-1), the first upper folding line (20) is a folding line used for bending towards the upper surface of the buffer bottom box blank (42-1); the rectangular paperboard is provided with a first width edge (22) as an edge parallel to the width direction, 2 first cutting lines (24) which are perpendicular to the first width edge (22) and are arranged at intervals are cut from 2 first width edges (22), and the other ends of the first cutting lines (24) are positioned at first lower folding lines (18) close to the corresponding side first width edges (22); cutting 2 second cutting lines (23) which are arranged at intervals and are perpendicular to each second lower folding line (19) from each second lower folding line (19), wherein the other ends of the second cutting lines (23) are positioned between the first lower folding line (18) and the first width edge (22) of the corresponding side; the first cutting line (24) and the second cutting line (23) are symmetrically arranged along the transverse middle line and the longitudinal middle line of the rectangular paperboard respectively;

the box blanks (42-2) of the 2 buffer supports are identical in structure and are all strip-shaped rectangular paper boards, a third lower folding line (27), a fourth lower folding line (28), a fifth lower folding line (30) and a sixth lower folding line (31) are sequentially pressed on each strip-shaped rectangular paper board, and the third lower folding line (27), the fourth lower folding line (28), the fifth lower folding line (30) and the sixth lower folding line (31) are folding lines used for bending towards the lower side of the strip-shaped rectangular paper boards;

the edge of the strip-shaped rectangular paperboard parallel to the width direction is a second width edge (35), a rectangular third concave opening (26) is formed on the second width edge (35) close to the third lower folding line (27), and the edges of two opposite sides of the third concave opening (26) are respectively connected with a buffer sheet (25); a fourth rectangular recessed opening (32) is formed in a second width edge (35) adjacent to the sixth lower fold line (31); a special-shaped cutting line (29) is cut between the fourth lower folding line (28) and the fifth lower folding line (30), and the shape of the special-shaped cutting line (29) is the same as the line shape of the cross section of the structure formed by folding the buffer bottom box blank (42-1);

wherein the widths of the third and fourth recess openings (26, 32) are respectively the same as the distance between 2 of the first upper folding lines (20); the rectangular paperboard is a first length edge (21) along the edge parallel to the length direction of the rectangular paperboard, and the distance between the fifth lower folding line (30) and the sixth lower folding line (31) is slightly smaller than the distance between the first length edge (21) and the first cutting line (24).

2. The buffer box blank according to claim 1, wherein said contour cut line (29) is formed with 2 second rectangular ribs (34) and a first rectangular rib (33) located between the 2 second rectangular ribs (34), said first rectangular rib (33) and 2 second rectangular ribs (34) being engaged with each other to form a flat surface.

3. A method of folding a cushioning box blank into a cushioning box according to any of claims 1 to 2, comprising the steps of:

(1) the box blanks (42-2) of the buffer supports are respectively positioned at two opposite sides of the box blank (42-1) of the buffer bottom, the lower surface of each box blank (42-2) of the buffer supports faces the box blank (42-1) of the buffer bottom, the first upper folding line (20) is vertical to the box blank (42-2) of the buffer supports, and the second width edge (35) is parallel to the plane of the box blank (42-1) of the buffer bottom;

(2) bending the rectangular paperboard along the first lower folding line (18) and the second lower folding line (19) of the rectangular paperboard for 90 degrees, bending the rectangular paperboard along the first upper folding line (20) for 90 degrees, and obtaining a buffer bottom with the same shape of the line shape on the cross section as the special-shaped cutting line (29);

(3) respectively sleeving special-shaped cutting lines (29) of 2 buffer support box blanks (42-2) at two ends of the buffer bottom, so that the buffer bottom box blanks (42-1) are bent in the special-shaped cutting lines (29) along the shape of the special-shaped cutting lines (29);

(4) -for each of 2 of said buffer carrier blanks (42-2): bending the box blank of the buffer support below (42-2) by 90 degrees along the fourth lower folding line (28), the fifth lower folding line (30) and the sixth lower folding line (31), and bending the box blank of the buffer support below (42-2) by 100-120 degrees along the third lower folding line (27); inserting the end parts of the cushion support box blanks (42-2) positioned at the two sides of the third sunken opening (26) into second cutting lines (23) adjacent to the cushion support box blanks (42-2) respectively; the end parts of the cushion support box blanks (42-2) positioned at the two sides of the fourth sunken opening (32) are respectively inserted into the first cutting lines (24) adjacent to the cushion support box blanks (42-2).

4. A method of folding a cushioning blank into a cushioning box according to claim 3, wherein in step (3), said cushioning bottom is formed with 2 downwardly opening second recesses (40) and upwardly opening first recesses (39) located between the 2 second recesses (40) after being folded 90 ° below the rectangular sheet along said first and second lower fold lines (18, 19) and 90 ° above the rectangular sheet along said first upper fold line (20).

5. The method of folding a cushion box blank into a cushion box according to claim 4, wherein the contour cut line (29) is formed with 2 second rectangular ribs (34) and first rectangular ribs (33) between the 2 second rectangular ribs (34), the first rectangular ribs (33) and the 2 second rectangular ribs (34) are engaged with each other to form a flat surface, the first rectangular ribs (33) are located in the first grooves (39) and fitted to inner walls of the first grooves (39) and the second rectangular ribs (34) are located in the second grooves (40) and fitted to inner walls of the second grooves (40) when the contour cut lines (29) of the 2 cushion support blanks (42-2) are fitted to one end of one of the cushion bases, respectively.

6. A buffer cell obtainable by the method of claim 4 or 5.

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