Method, apparatus for manufacturing a buffer pad, and buffer pad

Abstract

The present invention discloses a method, an apparatus and a buffer pad for manufacturing a buffer pad. The buffer pad includes a pad body, and a wrinkled area is provided on the pad body. The wrinkled area includes at least two wrinkles having crests and / or troughs, and all the wrinkles are arranged along the length direction of the pad body; a bent portion is provided on the pad body to respectively form a first body and a second body on both sides of the pad body located at the bent portion, and at least one of the first body and the second body includes a wrinkled area; and the cross-section of the buffer pad has a structure close to a "V" shape, or at least part of the surface of the first body close to the bent portion is mutually attached to at least part of the surface of the second body close to the bent portion, so that the cross-section of the buffer pad has a "Y" shape; the extending direction of the bent portion is set to be substantially along the length direction of the pad body. So that the buffer pad has a more three-dimensional structure, and thus has a better buffer effect.

Description

Technical Field

[0001] The present invention relates to a buffer cushion for packaging, and particularly to a method, a device and a buffer cushion for manufacturing the buffer cushion. Background Art

[0002] During transportation, in order to prevent or reduce the displacement of an article in a packaging container, cushioning material can be used to fill the voids in the packaging container to protect the article from being damaged. Such low-density cushioning material required for packaging is generally obtained by converting a raw material sheet through a cushion converter.

[0003] However, in the existing technical solutions, the buffer cushion for filling either simply folds and crumples the raw material sheet, making the cushion product not three-dimensional enough and prone to unfolding, which can neither play a better buffering role nor reduce the consumption of materials; or although a buffer cushion with a lower density and a stronger buffering effect can be obtained, the production of such a buffer cushion highly depends on the structure of the raw material sheet, and a raw material sheet with a complex structure is required for manufacturing, and such a raw material sheet with a complex structure is often expensive.

[0004] Therefore, inventing a cushion with a lower density and a better buffering effect, as well as a method or device for manufacturing such a cushion, so as to reduce the number of cushions required for the same packaging and lower the packaging cost of the article, is an urgent problem to be solved in the field of packaging articles using buffer cushions. Summary of the Invention

[0005] In order to solve at least one of the above problems, according to one aspect of the present invention, a buffer cushion is provided.

[0006] The buffer cushion includes a cushion body, on which a wrinkled area is provided. The wrinkled area includes at least two wrinkles having crests and / or troughs, and all the wrinkles are arranged along the length direction of the cushion body; there is a bending part on the cushion body to form a first body and a second body on both sides of the cushion body located at the bending part respectively, and at least one of the first body and the second body includes a wrinkled area; and the cross-section of the buffer cushion has a structure close to a "V" shape, or at least part of the surface of the first body close to the bending part is mutually attached to at least part of the surface of the second body close to the bending part, so that the cross-section of the buffer cushion has a "Y" shape; the extending direction of the bending part is set to be generally along the length direction of the cushion body.

[0007] Accordingly, in addition to including at least two pleats having crests and / or troughs arranged along the length direction of the cushion body, the cushion liner further includes a bent portion extending substantially along the length direction of the cushion body to distinguish a first body and a second body on the cushion body, so that in addition to having pleats, the cushion liner has a three-dimensional structure with a cross section approaching a "V" shape or a "Y" shape, making the cushion liner of the present invention have a better cushioning effect than ordinary cushion liners; moreover, since the cushion liner of the present invention has a bent portion, it can prevent the cushion liner from unfolding into a structure with a cross section approaching a "one" shape, enabling the cushion liner to stably maintain a three-dimensional structure with a cross section approaching a "V" shape or a "Y" shape during placement or use.

[0008] In some embodiments, the crest line of the crest and the trough line of the trough are arranged not parallel to the length direction of the cushion body. Accordingly, it is possible to avoid, as much as possible, the extension direction of the bent portion being the same as the crest line or the trough line, so that by controlling the pleat lines (crest line and trough line) not to be parallel to the extension direction of the bent portion (e.g., the fold line), the cushion liner has at least two bends in different directions, thereby further improving the three-dimensionality and cushioning effect of the cushion liner.

[0009] In some embodiments, the realization that at least part of the surfaces of the first body and the second body close to the bent portion are mutually attached is as follows: the first body further has a first pleat portion, the second body further has a second pleat portion, and at least one first pleat portion and at least one second pleat portion are mutually engaged to realize the attachment of part of the surfaces of the first body and the second body at the engagement portion. Accordingly, it is possible to further prevent the cushion liner from unfolding into a structure with a cross section approaching a "one" shape during placement or use by the mutual engagement of the first pleat portion on the first body and the second pleat portion on the second body, thereby playing a role in ensuring the cushioning effect of the cushion liner.

[0010] According to one aspect of the present invention, there is provided a method for preparing a cushion liner.

[0011] The method for preparing the cushion liner includes the following steps:

[0012] S10: Wrinkling the raw material sheet to form at least two pleat regions having crests and / or troughs on the raw material sheet and all the pleats are arranged along the length direction of the raw material sheet to form a cushion body;

[0013] S20: Bending the cushion body having the pleat region to form a bent portion on the cushion body, so as to form a first body and a second body on both sides of the cushion body located at the bent portion;

[0014] After step S20, step S30 is further included: shaping the first body and the second body so that the cross-section of the buffer pad has a structure close to a "V" shape;

[0015] Or after step S20, step S30' is further included: shaping the first body and the second body so that at least part of the surface of the first body near the bending part is mutually attached to at least part of the surface of the second body near the bending part, so that the cross-section of the buffer pad has a "Y" shape;

[0016] Wherein, the extending direction of the bending part is arranged substantially along the length direction of the pad body.

[0017] By adopting the preparation method of the present invention, the dependence of the preparation of the buffer pad on raw material sheets with complex structures is avoided. Only ordinary paper sheets are needed to prepare a buffer pad that, in addition to including at least two folds with wave peaks and / or wave valleys arranged along the length direction of the pad body, also includes a bending part that extends substantially along the length direction of the pad body to distinguish the first body and the second body on the pad body, so that in addition to having folds, the buffer pad stably has a three-dimensional structure with a cross-section close to a "V" shape or a "Y" shape, making the prepared buffer pad have a better buffering effect than ordinary buffer pads.

[0018] In some embodiments, in step S10, when wrinkling the raw material sheet, the peak line of the wave peak and the valley line of the wave valley of the formed folds are not parallel to the length direction of the pad body. Thus, it is possible to avoid, as much as possible, the extending direction of the bending part being the same as the peak line or the valley line, so that the prepared buffer pad has at least two bends in different directions by controlling the non-parallelism between the fold line and the extending direction of the bending part, thereby further improving the three-dimensionality and buffering effect of the buffer pad.

[0019] In some embodiments, after step S30 or after step S30', the following steps are further included:

[0020] S40: cutting the formed buffer pad with a cross-section close to a "V" shape or a "Y" shape, and the cutting direction is not parallel to the length direction of the pad body.

[0021] Thus, it can be ensured that the obtained buffer pad product after cutting still retains the fold area, the first body, the second body, and the structural features of a cross-section close to a "V" shape or a "Y" shape, thereby ensuring the buffering performance of the cut buffer pad product.

[0022] According to one aspect of the present invention, a device for manufacturing a buffer pad is provided.

[0023] The device for manufacturing a buffer cushion includes: a frame; a wrinkling unit fixedly arranged relative to the frame and used for wrinkling a raw material sheet to form a wrinkled area on the raw material sheet with at least two wrinkles having crests and / or troughs on the buffer cushion body; a bending unit fixedly arranged relative to the frame and used for forming a bending part on the buffer cushion body prepared by the wrinkling unit, so as to form a first body and a second body on both sides of the buffer cushion body located at the bending part respectively; and a shaping unit fixedly arranged relative to the frame and used for rolling at least one of the bending part of the buffer cushion body with a bending part processed by the bending unit, the part of the first body close to the bending part, and the part of the second body close to the bending part, so that the cross-section of the buffer cushion is close to a "V" shape or a "Y" shape.

[0024] Thus, the device for manufacturing a buffer cushion of the present invention can successively complete the wrinkling treatment, bending treatment and shaping treatment of an ordinary raw material sheet, and conveniently and efficiently prepare a buffer cushion with good three-dimensionality and buffering effect, which not only has wrinkles but also stably has a three-dimensional structure with a cross-section close to a "V" shape or a "Y" shape, avoiding the dependence on a raw material sheet with a complex structure in the preparation of the buffer cushion.

[0025] In some embodiments, the wrinkling unit includes at least a pair of upstream roller structures and at least a pair of downstream roller structures, and the rotation speed of the downstream roller structure is set to be lower than that of the upstream roller structure. Thus, the wrinkling treatment of the raw material sheet conveyed by the upstream and downstream roller structures can be realized through the rotation speed difference between the upstream and downstream roller structures, and the structure is simple and convenient for realizing automation. Preferably, at least one roller body in the upstream roller structure and the downstream roller structure is arranged on the frame through a swing mechanism, and a pressing unit for applying pressure to the swing mechanism to make the roller body abut against the outer periphery of another roller body in the same set of roller structures is further arranged on the frame; and / or the bending unit includes a supporting structure for supporting the bottom surface of the buffer cushion body, a height limiting structure for restricting the upward movement of the buffer cushion body, and a bending structure for bending the buffer cushion body upward.

[0026] By arranging at least one roller body in the upstream roller structure and the downstream roller structure on the frame through a swing mechanism and simultaneously arranging a pressing unit capable of pressing the roller body against the outer periphery of another roller body in the same roller structure, the roller structure with this structure can clamp and convey the raw material sheet even if the roller body is worn. When the buffer cushion body moves to the position where the bending unit is located under the conveying of the downstream roller structure, due to the combined action of the supporting structure and the height limiting structure, the continuously moving buffer cushion body bends upward when passing through the bending structure under the conveying of the downstream roller structure, so as to form a bending part on the buffer cushion body, and the extending direction of the bending part is substantially the same as the moving direction of the buffer cushion body, that is, substantially extending along the length direction of the buffer cushion body.

[0027] In some embodiments, the surfaces of the support structure and the height-limiting structure that contact the cushion body are both located below the tangent plane of the downstream roller structure. Since the cushion body has a tendency to move downward under the action of its own gravity, such an arrangement can avoid paper jams caused by the surfaces of the support structure and the height-limiting structure that contact the cushion body being located above the tangent plane of the downstream roller structure. Moreover, when the tangent plane of the downstream roller structure and the surfaces of the support structure and the height-limiting structure that contact the cushion body are not on the same horizontal plane, it can also make the folding line of the bent portion form an arc line rather than a straight line in the extending direction thereof, so as to further improve the three-dimensionality of the prepared cushion liner. Preferably, the bending unit further includes a guiding mechanism for guiding the cushion body from the wrinkling unit to between the support structure and the height-limiting structure. Thereby, it is possible to further avoid paper jams caused by the cushion body failing to move smoothly between the support structure and the height-limiting structure. Preferably, the bending structure includes at least one set of first limiting plates respectively arranged on both sides of the downstream roller structure, and the distance between the first limiting plates on both sides of the downstream roller structure in a set of first limiting plates in the horizontal plane along the direction perpendicular to the discharging direction decreases along the discharging direction; and / or the height-limiting structure is located on the central axis of the downstream roller structure parallel to the feeding direction. Through the arrangement of the first limiting plates, the support structure and the height-limiting structure, while the cushion body moves driven by the downstream roller structure, the distance between the two side edges of the cushion body is reduced, that is, the two side edges of the cushion body are bent upward, and a bent portion is formed on the cushion body. By arranging the height-limiting structure on the central axis of the downstream roller structure parallel to the feeding direction, it is possible to achieve symmetric bending of the cushion body as much as possible, so that a wrinkled area is retained on both the first body and the second body, thereby ensuring the buffering effect of the prepared cushion liner.

[0028] In some embodiments, the contact surface when the wrinkling unit contacts the raw material sheet is perpendicular to the contact surface when the shaping unit contacts the cushion body, so that after the shaping unit rolls at least one of the bent portion, the portion of the first body close to the bent portion, and the portion of the second body close to the bent portion, the cross-section of the cushion liner can be made to be approximately "V"-shaped, or at least part of the surface of the portion of the first body close to the bent portion can be made to fit with at least part of the surface of the portion of the second body close to the bent portion, so that the cross-section of the cushion liner is "Y"-shaped. Thereby, it can be ensured that the peak lines and valley lines of the wrinkles formed by the wrinkling unit and the creases formed by shaping are basically not parallel, so as to ensure the three-dimensionality of the prepared cushion liner. Preferably, at least part of the portion of the shaping unit for rolling the first body and the second body is located above the support structure. Thereby, it can be ensured that the shaping unit can effectively shape the cushion body.

[0029] In some embodiments, the device for manufacturing the buffer cushion further includes a control module; the control module is configured to at least control the rotation speed of the upstream roller structure; or further includes a control module and at least one set of feed roller structures arranged at the feed end of the upstream roller structure, and the control module is configured to at least control the rotation speed of the feed roller structures; or further includes a cutting unit for cutting the cushion body.

[0030] Thus, the cushion body between the upstream roller structure and the downstream roller structure can be broken due to the speed difference between the two by controlling the rotation speed of the upstream roller structure to be slower than that of the downstream roller structure by the control module, so as to realize the cutting of the cushion body; the cushion body between the upstream roller structure and the downstream roller structure, or the cushion body between the upstream roller structure and the feed roller structure can also be broken due to the speed difference between the feed roller structure and the upstream roller structure or the downstream roller structure by controlling the rotation speed of the feed roller structure to be lower than that of the upstream roller structure or the downstream roller structure by the control module, so as to realize the cutting of the cushion body; the cushion body can also be cut by the cutting unit, and the cutting unit can be arranged at any position as required, for example, at the feed end of the upstream roller structure, or between the upstream roller structure and the downstream roller structure, or before the downstream roller structure and the bending unit, or between the bending unit and the shaping unit. Preferably, the cutting unit is arranged at the discharge end of the shaping unit. Thus, even after the cutting unit cuts the cushion body, the device for manufacturing the buffer cushion of the present invention can still continuously produce, so as to realize the automated production of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a buffer cushion according to an embodiment of the present invention;

[0032] Figure 2 is Figure 1 a simplified schematic cross-sectional structure diagram of one embodiment of the shown buffer cushion along the A-A direction;

[0033] Figure 3 is Figure 1 a simplified schematic cross-sectional structure diagram of another embodiment of the shown buffer cushion along the A-A direction;

[0034] Figure 4 is Figure 1 a simplified schematic cross-sectional structure diagram of the shown buffer cushion along the B-B direction;

[0035] Figure 5 is Figure 1 a schematic structural diagram of another perspective of the shown buffer cushion;

[0036] Figure 6 is a schematic structural diagram of a buffer cushion according to another embodiment of the present invention;

[0037] Figure 7 is Figure 6 a simplified schematic cross-sectional structure diagram along the C-C direction of one embodiment of the buffer cushion shown;

[0038] Figure 8 is Figure 6 a simplified schematic cross-sectional structure diagram along the C-C direction of another embodiment of the buffer cushion shown;

[0039] Figure 9 is a schematic flow chart of the preparation method of the buffer cushion according to the first embodiment of the present invention;

[0040] Figure 10 is a schematic flow chart of the preparation method of the buffer cushion according to the second embodiment of the present invention;

[0041] Figure 11 is a schematic flow chart of the preparation method of the buffer cushion according to the third embodiment of the present invention;

[0042] Figure 12 is a schematic flow chart of the preparation method of the buffer cushion according to the fourth embodiment of the present invention;

[0043] Figure 13 is a schematic structural diagram of the cushion body prepared by adopting step S10;

[0044] Figure 14 is a schematic structural diagram of the device for manufacturing the buffer cushion according to an embodiment of the present invention;

[0045] Figure 15 is Figure 14 a schematic structural diagram of another perspective of the device for manufacturing the buffer cushion shown;

[0046] Figure 16 is Figure 15 a schematic cross-sectional structure diagram along the D-D direction of the device for manufacturing the buffer cushion shown;

[0047] Figure 17 is a schematic structural diagram of the bending structure according to an embodiment of the present invention;

[0048] Figure 18 is a schematic structural diagram of the wrinkling unit according to an embodiment of the present invention;

[0049] Figure 19 is a schematic module structure diagram of the device for manufacturing the buffer cushion according to an embodiment of the present invention;

[0050] Reference numerals: 20, gasket body; 21, corrugated area; 211, wave crest; 2111, wave crest line; 212, wave trough; 2121, wave trough line; 22, bending part; 201, first body; 2011, first corrugation; 202, second body; 2021, second corrugation; 30, frame; 40, wrinkling unit; 41, upstream roller structure; 42, downstream roller structure; 401, roller body; 43, swing mechanism; 44, pressing unit; 50, bending unit; 51, support structure; 52, height limiting structure; 53, bending structure; 531, first limiting plate; 54, guiding mechanism; 60, shaping unit; 70, control module; 80, feeding roller structure; 100, guiding plate; 101, feeding end; 102, discharging end. Detailed implementation manners

[0051] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0052] It should also be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "include" and "comprise", not only include those elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method, article or equipment. Without further limitation, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the said elements. The terms used in this text are generally the commonly used terms by those skilled in the art. If they are inconsistent with the commonly used terms, the terms in this text shall prevail.

[0053] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] Figures 1 to 5 Schematically shows a buffer gasket according to the first implementation manner of the present invention.

[0055] As Figure 1As shown, the buffer cushion includes a cushion body 20; a wrinkled area 21 is provided on the cushion body 20; the wrinkled area 21 includes at least two wrinkles, and each wrinkle has at least one of a wave crest 211 and a wave trough 212. All the wrinkles are arranged along the length direction of the cushion body 20 (such as Figure 1 the direction parallel to the Y-axis in

[0056] ); a bending portion 22 is provided on the cushion body 20 to form a first body 201 and a second body 202 on both sides of the cushion body 20 where the bending portion 22 is located respectively, and at least one of the first body 201 and the second body 202 includes the aforementioned wrinkled area 21. The extending direction of the bending portion 22 is set to be generally along the length direction of the cushion body 20; and the cross-section of the buffer cushion is in a structure close to a "V" shape. Figure 2 As shown.

[0057] Exemplarily, the bending portion 22 exists on the cushion body 20 in the form of a line (i.e., a bending line, and the bending line can be a straight line or a broken line, as Figure 3 shown) or a wrinkle (as Figure 4 shown) to distinguish the first body 201 on one side of the bending portion 22 and the second body 202 on the other side of the bending portion 22 on the cushion body 20.

[0058] In some embodiments, the length direction of the cushion body 20 can extend along a straight line direction, as Figure 1 shown.

[0059] In other embodiments, the length direction of the cushion body 20 can extend along an arc direction, as Figure 5 shown. In this embodiment, since the length direction of the cushion body 20 extends along the arc direction, the three-dimensionality of the cushion body 20 is stronger and the buffering effect is better.

[0060] Figures 6 to 8 Schematically shows a buffer cushion according to the second embodiment of the present invention.

[0061] As Figure 6As shown, the buffer cushion includes a cushion body 20, and a wrinkled area 21 is provided on the cushion body 20. The wrinkled area 21 includes at least two wrinkles, and each wrinkle has at least one of a wave crest 211 and a wave trough 212. All the wrinkles are arranged along the length direction of the cushion body 20; a bent portion 22 is provided on the cushion body 20, so that a first body 201 and a second body 202 are respectively formed on both sides of the cushion body 20 where the bent portion 22 is located. At least one of the first body 201 and the second body 202 includes the aforementioned wrinkled area 21. The extending direction of the bent portion 22 is set to be substantially along the length direction of the cushion body 20; and at least part of the surface of the first body 201 close to the bent portion 22 is mutually attached to at least part of the surface of the second body 202 close to the bent portion 22, so that the cross-section of the buffer cushion is in a "Y" shape (as Figure 7 and Figure 8 shown).

[0062] One embodiment in which at least part of the surface of the first body 201 close to the bent portion 22 is mutually attached to at least part of the surface of the second body 202 close to the bent portion 22 is as Figure 8 shown. The first body 201 further has a first wrinkled portion 2011, and the second body 202 further has a second wrinkled portion 2021. And at least one first wrinkled portion 2011 is fitted with at least one second wrinkled portion 2021, so as to realize the attachment of part of the surfaces of the first body 201 and the second body 202 at the fitting portion. Thus, the separation at the fitting portion can be avoided by the mutual fitting of the first wrinkled portion 2011 on the first body 201 and the second wrinkled portion 2021 on the second body 202, so that the three-dimensional structure of the buffer cushion in a "Y" shape can be stably guaranteed.

[0063] Whether it is the cushion body 20 of the first embodiment or the cushion body 20 of the second embodiment, in order to further improve the three-dimensionality of the buffer cushion, preferably, as Figure 1 and Figure 6 shown, the wave crest line 2111 of the wave crest 211 and the wave trough line 2121 of the wave trough 212 can be set to be not parallel to the length direction of the cushion body 20. Thus, the extending direction of the bent portion 22 (i.e., the extending direction of the bending line) can be avoided from being the same as the wave crest line 2111 or the wave trough line 2121 as much as possible. Therefore, by controlling the wrinkled lines (the wave crest line 2111 and the wave trough line 2121) to be not parallel to the extending direction of the bent portion 22, the buffer cushion has at least two bends in different directions, and further improves the three-dimensionality and buffering effect of the buffer cushion.

[0064] By providing at least two wrinkles with crests 211 and / or troughs 212 arranged along the length direction of the cushion body 20 on the cushion body 20, and at the same time, providing a bending portion 22 on the cushion body 20 that extends substantially along the length direction of the cushion body 20 to distinguish a first body 201 and a second body 202 on the cushion body 20, the buffer cushion has a three-dimensional structure with a cross-section close to a "V" shape or a "Y" shape in addition to the wrinkles, making the buffer cushion of the present invention have a better buffering effect than ordinary buffer cushions; moreover, since the buffer cushion of the present invention has a bending portion 22, it can prevent the buffer cushion from unfolding into a structure with a cross-section close to a "one" shape (as shown in Figure 13 ), so that the buffer cushion can relatively stably maintain a three-dimensional structure with a cross-section close to a "V" shape or a "Y" shape during placement or use.

[0065] Figures 9 to 12 Schematically shows a method for preparing a buffer cushion according to at least one embodiment of the present invention.

[0066] Among them, Figure 9 Exemplarily shows a method for preparing a buffer cushion according to the first embodiment of the present invention.

[0067] The method for preparing the buffer cushion of this embodiment includes the following steps:

[0068] S10: Wrinkle the raw material sheet to form at least two wrinkles on the raw material sheet. The wrinkles have crests 211 and / or troughs 212, and all the wrinkles are arranged in a wrinkled area 21 along the length direction of the raw material sheet to form a cushion body 20;

[0069] S20: Bend the cushion body 20 with the wrinkled area 21 to form a bending portion 22 on the cushion body 20, so as to form a first body 201 and a second body 202 on both sides of the cushion body 20 where the bending portion 22 is located. The extending direction of the bending portion 22 is substantially set along the length direction of the cushion body 20;

[0070] After step S20, there is also step S30: Shape the first body 201 and the second body 202 to make the cross-section of the buffer cushion close to a "V" shape.

[0071] In step S10, the raw material sheet can be a paper sheet for packaging consumables, which can be a single-layer paper sheet or a multi-layer paper sheet; the wrinkling treatment of the raw material sheet can be carried out manually by an operator or by means of a wrinkling unit 40 for wrinkling paper sheets in the prior art. For the cushion body 20 with the wrinkled area 21 obtained after the wrinkling treatment in step S10, when the width of the raw material sheet is completely wrinkled, it can be obtained asFigure 13 The cushion body 20 shown in FIG. 1 is a cushion body 20. Of course, the folds on the cushion body 20 are not necessarily as Figure 13 The uniform distribution shown.

[0072] In some embodiments, in step S10, when the raw material sheet is crumpled, the crest line 2111 of the crest 211 and the trough line 2121 of the trough 212 of the formed folds are not parallel to the length direction of the pad body 20. Thus, the extension direction of the bending portion 22 can be avoided as much as possible from being in the same direction as the crest line 2111 or the trough line 2121, so that the prepared cushion pad has at least two bends in different directions by controlling the fold line to be not parallel to the extension direction of the bending portion 22, thereby further improving the three-dimensionality and cushioning effect of the cushion pad.

[0073] In step S20, the pad body 20 having the wrinkled area 21 is bent. The bending process may be performed manually by an operator or by using a bending unit 50 for bending a sheet in the prior art.

[0074] In step S30, the bent pad body 20 is subjected to shaping treatment, which may be a strengthening treatment of the bent portion 22, for example, by pressing the first body 201 toward the second body 202 to shape the bending line of the bent portion 22, forming a Figure 1 , Figures 3 to 5 The cross section of the cushioning pad is approximately V-shaped.

[0075] Figure 10 A method for preparing a cushion pad according to a second embodiment of the present invention is exemplarily shown.

[0076] The difference between the method for preparing the cushion pad of this embodiment and the method for preparing the cushion pad of the first embodiment is that:

[0077] After step S20, step S30' is also included: shaping the first body 201 and the second body 202 so that at least a portion of the surface of the first body 201 close to the bending portion 22 fits with at least a portion of the surface of the second body 202 close to the bending portion 22 so that the cross-section of the buffer pad is "Y"-shaped.

[0078] In step S30`, the shaping process for the bent gasket body 20 can be to crumple or roll the positions of the first body 201 and the second body 202 close to the bending portion 22. Specifically, it can be manually operated by an operator, or the crumpling unit 40 for crumpling paper in the prior art can be used to crumple the first body 201 and the second body 202. The rolling unit for rolling paper in the prior art can also be used to roll the first body 201 and the second body 202, so as to form the first fold 2011 and the second fold 2021 that can be mutually engaged on the first body 201 and the second body 202, forming a Figures 6 to 8 buffer gasket with a cross-section approximately in the shape of a "Y" as shown.

[0079] Figure 11 Exemplarily shows the preparation method of the buffer gasket according to the third embodiment of the present invention.

[0080] The difference between the preparation method of the buffer gasket in this embodiment and the preparation method of the buffer gasket in the first embodiment is that

[0081] In some embodiments, after step S30, the following steps are further included:

[0082] S40: Cut the formed buffer gasket with a cross-section approximately in the shape of a "V" or a "Y", and the cutting direction is not parallel to the length direction of the gasket body 20.

[0083] Figure 12 Exemplarily shows the preparation method of the buffer gasket according to the fourth embodiment of the present invention.

[0084] The difference between the preparation method of the buffer gasket in this embodiment and the preparation method of the buffer gasket in the second embodiment is that

[0085] In some embodiments, after step S30`, the following steps are further included:

[0086] S40: Cut the formed buffer gasket with a cross-section approximately in the shape of a "V" or a "Y", and the cutting direction is not parallel to the length direction of the gasket body 20.

[0087] Regardless of which embodiment of the preparation method of the buffer gasket is adopted, in step S40, the buffer gasket can be cut by an operator or by a cutting unit in the prior art to obtain buffer gaskets of different lengths as needed; specifically, the cutting position can be at the position where the buffer gasket is formed or at the position of the raw material sheet.

[0088] By adopting the preparation method of the present invention, the dependence on raw material sheets with complex structures in the preparation of buffer cushions is avoided. Only ordinary paper sheets are required, such as single-layer paper sheets (multi-layer paper sheets can also be used, and the multi-layer paper sheets can be connected to each other or not connected to each other. Of course, the method of the present invention is also applicable to raw material sheets with complex structures). A buffer cushion can be prepared, which, in addition to including at least two folds having wave peaks 211 and / or wave valleys 212 arranged along the length direction of the cushion body 20, further includes a bending portion 22 extending substantially along the length direction of the cushion body 20 to distinguish a first body 201 and a second body 202 on the cushion body 20. In this way, in addition to having folds, the buffer cushion stably has a three-dimensional structure with a cross-section approximately in a "V" shape or a "Y" shape, making the prepared buffer cushion have a better buffering effect than ordinary buffer cushions.

[0089] Figures 14 to 17 Schematically shows a device for manufacturing a buffer cushion according to at least one embodiment of the present invention.

[0090] As Figure 14 shown, the device for manufacturing a buffer cushion includes a frame 30, a wrinkling unit 40, a bending unit 50, and a shaping unit 60. Among them, the wrinkling unit 40 is fixedly arranged relative to the frame 30, and the wrinkling unit 40 is used to wrinkle the raw material sheet to form a cushion body 20 with a wrinkled area 21 having at least two folds, and the folds include wave peaks 211 and / or wave valleys 212. The bending unit 50 is fixedly arranged relative to the frame 30, and the bending unit 50 is used to form a bending portion 22 on the cushion body 20 prepared by the wrinkling unit 40, so as to form a first body 201 and a second body 202 on both sides of the cushion body 20 where the bending portion 22 is located. The shaping unit 60 is fixedly arranged relative to the frame 30, and the shaping unit 60 is used to roll at least one of the bending portion 22 of the cushion body 20 with the bending portion 22 processed by the bending unit 50, the portion of the first body 201 close to the bending portion 22, and the portion of the second body 202 close to the bending portion 22, so that the cross-section of the buffer cushion is approximately in a "V" shape or a "Y" shape. Exemplarily, the bending unit 50 is arranged at the discharge end 102 of the wrinkling unit 40; the shaping unit 60 is arranged at the discharge end 102 of the bending unit 50.

[0091] When using the device for manufacturing a buffer cushion of the present invention, first, the raw material sheet is wrinkled by the wrinkling unit 40 to form at least two wrinkles on the raw material sheet. The wrinkles have crests 211 and / or troughs 212, and all the wrinkles are arranged in a wrinkled area 21 along the length direction of the raw material sheet to form the cushion body 20. The raw material sheet can be a paper sheet for packaging consumables, which can be a single-layer paper sheet or a multi-layer paper sheet. Moreover, the conveying direction of the raw material sheet by the wrinkling unit 40 is also the length direction of the raw material sheet. Thus, the crest line 2111 of the crests 211 and the trough line 2121 of the troughs 212 of the wrinkles of the cushion body 20 obtained by the wrinkling treatment of the wrinkling unit 40 are not parallel to the length direction of the cushion body 20. The structure of the cushion body 20 with the wrinkled area 21 obtained by the wrinkling treatment is as Figure 13 shown; then, the cushion body 20 with the wrinkled area 21 is bent by the bending unit 50 to form a bent portion 22 on the cushion body 20, so as to form a first body 201 and a second body 202 on both sides of the cushion body 20 where the bent portion 22 is located respectively. The extending direction of the bent portion 22 is generally arranged along the length direction of the cushion body 20; then, the first body 201 and the second body 202 are shaped by the shaping unit 60, so that the cross-section of the buffer cushion is in a structure close to a "V" shape, or at least part of the surface of the first body 201 close to the bent portion 22 is attached to at least part of the surface of the second body 202 close to the bent portion 22, so that the cross-section of the buffer cushion is in a "Y" shape.

[0092] Therefore, the wrinkling treatment, bending treatment and shaping treatment of an ordinary raw material sheet (such as a single-layer paper sheet, or a multi-layer paper sheet, which can be connected to each other or not, and of course, the method of the present invention is also applicable to raw material sheets with complex structures) can be sequentially completed by the device for manufacturing a buffer cushion of the present invention, and a buffer cushion with good three-dimensionality and buffering effect, which not only has wrinkles but also stably has a three-dimensional structure with a cross-section close to a "V" shape or a "Y" shape, can be conveniently and efficiently prepared, avoiding the dependence of the preparation of the buffer cushion on raw material sheets with complex structures.

[0093] Figures 14 to 16An exemplary embodiment of the wrinkling unit 40 is shown. In this embodiment, the wrinkling unit 40 includes at least a pair of upstream roller structures 41 and at least a pair of downstream roller structures 42 (for example, including a pair of upstream roller structures 41 and two pairs of downstream roller structures 42, or including two pairs of upstream roller structures 41 and two pairs of downstream roller structures 42). Among them, the upstream roller structure 41 and the downstream roller structure 42 are a set of relative concepts. The upstream roller structure 41 is a pair of roller structures arranged upstream of the downstream roller structure 42 (that is, on the feed end 101 side), and the downstream roller structure 42 is a pair of roller structures arranged downstream of the upstream roller structure 41 (that is, on the discharge end 102 side). Each pair of roller structures includes two rollers 401 with their outer diameters abutting against each other. Specifically, the rollers 401 are the rollers 401 commonly used in the prior art, and the conveying method of a pair of roller structures is also the same as that of a pair of roller structures in the prior art. Without special emphasis, the present invention does not make special limitations on this; and the rotational speed of the downstream roller structure 42 is set to be lower than that of the upstream roller structure 41. Thus, the wrinkling treatment of the raw material sheet conveyed by the upstream and downstream roller structures 42 can be achieved through the rotational speed difference between the upstream roller structure 41 and the downstream roller structure 42. The wrinkling direction of the raw material sheet by the wrinkling unit 40 is parallel to the feeding direction of the roller structure, with a simple structure and convenient for realizing automation.

[0094] As one of the preferred embodiments of the wrinkling unit 40, as Figure 18 shown, at least one roller 401 in at least one of the upstream roller structure 41 and the downstream roller structure 42 is arranged on the frame 30 through a swing mechanism 43, and a pressing unit 44 for applying pressure to the swing mechanism 43 to make the roller 401 abut against the outer circumference of another roller 401 in the same set of roller structures is also arranged on the frame 30. Exemplarily, as Figure 18 shown, one roller 401 of the upstream roller structure 41 and the downstream roller structure 42 is pivotally connected to the swing mechanism 43. The swing mechanism 43 is a swing arm with the pivot axis being the same as the rotation axis of the roller 401 and pivotally arranged relative to the frame 30; the pressing unit 44 is a spring with one end connected to the roller connected with the swing mechanism 43 and the other end connected to the frame 30 or to the roller connected with the swing mechanism 43 of another pair of roller structures, and the spring is arranged to apply an elastic force to the roller connected to it to abut against another roller 401 in the same pair of roller structures, so that the outer diameters of the two rollers 401 in the same pair of roller structures can always remain in an abutting state, enabling the roller structure with such a structure to clamp and convey the raw material sheet even if the roller 401 is worn.

[0095] Of course, other wrinkling mechanisms commonly used in the prior art for wrinkling the raw material sheet can also be used in the device of the present invention. Without special emphasis, the present invention does not limit the specific structure of the wrinkling unit 40.

[0096] As one of the preferred embodiments of the bending unit 50, as Figure 14 , Figure 16 and Figure 17 shown, the bending unit 50 includes a support structure 51 for supporting the bottom surface of the gasket body 20, a height limiting structure 52 for restricting the upward movement of the gasket body 20, and a bending structure 53 for bending the gasket body 20 upward. Exemplarily, the support structure 51 is a support plate or a support block disposed on one side of the discharge end 102 of the wrinkling unit 40 and capable of providing support to the bottom surface of the gasket body 20. The support structure 51 may be a plate-like structure or a block-like structure, as long as the support structure 51 can provide support to the bottom surface of the gasket body 20 conveyed by the wrinkling unit 40. Exemplarily, the height limiting structure 52 is disposed above the support structure 51 (it may be directly above or obliquely above); the height limiting structure 52 is a height limiting block, a height limiting rod, a height limiting sheet, etc. disposed on one side of the discharge end 102 of the wrinkling unit 40 and capable of restricting the upward movement of the gasket body 20, as long as the height limiting structure 52 can restrict the upward movement of the gasket body 20 conveyed by the wrinkling unit 40. Exemplarily, the bending structure 53 includes at least one set of first limiting plates 531 respectively disposed on both sides of the downstream roller structure 42, and the distance between the first limiting plates 531 on both sides of the downstream roller structure 42 in a set of first limiting plates 531 in the horizontal plane along a direction perpendicular to the discharge direction decreases along the discharge direction (i.e., the feeding direction), so that through the arrangement of at least one set of first limiting plates 531 with gradually decreasing distances along the discharge direction, when the gasket body 20 moves along the discharge direction, it is gradually bent upward under the combined action of the support structure 51, the height limiting structure 52, and the first limiting plates 531; when there are multiple sets of first limiting plates 531, the multiple sets of first limiting plates 531 are distributed along the feeding direction, and the multiple sets of first limiting plates 531 may or may not be connected to each other. Preferably, the distance between the first limiting plates 531 on both sides of the downstream roller structure 42 in the multiple sets of first limiting plates 531 along the feeding direction in the horizontal plane along a direction perpendicular to the discharge direction decreases along the discharge direction. Of course, when the placement mode of the device changes, the flipping direction of the gasket body 20 under the action of the bending unit 50 will also change accordingly, such as bending downward, bending leftward, or bending rightward. That is, the present invention does not specifically limit the bending direction, as long as the bending unit 50 can bend the gasket body 20 along a direction close to the length direction of the gasket body 20.

[0097] In one of the preferred embodiments of the height limiting structure 52, as Figure 14 shown, the height limiting structure 52 is located on the central axis of the downstream roller structure 42 parallel to the feeding direction. Thus, it is possible to achieve symmetrical bending of the gasket body 20 as much as possible, so that the wrinkled areas 21 are retained on both the first body 201 and the second body 202, thereby ensuring the buffering effect of the prepared buffer gasket.

[0098] In another preferred embodiment of the height-limiting structure 52, as Figure 16 shown, the surfaces of the support structure 51 and the height-limiting structure 52 that contact the gasket body 20 are both located below the tangent plane of the downstream roller structure 42 (i.e., the abutting surface of the two roller bodies 401 in any pair of downstream roller structures 42). Such a setting can prevent the gasket body 20 from moving downward under the action of its own gravity, resulting in the paper jamming phenomenon where the gasket body 20 cannot move between the support structure 51 and the height-limiting structure 52; moreover, when the tangent plane of the downstream roller structure 42 and the surfaces of the support structure 51 and the height-limiting structure 52 that contact the gasket body 20 are not on the same horizontal plane, it can also make the folding line of the folding portion 22 form an arc line rather than a straight line in the extending direction thereof (especially when there is also a shaping unit 60 to shape the formed arc), as Figure 5 shown, to further improve the three-dimensionality of the obtained cushioning gasket.

[0099] As one of the preferred embodiments of the folding unit 50, as Figure 14 and Figure 16 shown, the folding unit 50 further includes a guiding mechanism 54 for guiding the gasket body 20 from the wrinkling unit 40 to between the support structure 51 and the height-limiting structure 52. Exemplarily, the guiding mechanism 54 can be implemented as a guiding block, a guiding rod or a guiding sheet, etc. Preferably, when the guiding mechanism 54 is a guiding rod, one end of the guiding rod is connected to the bottom of the height-limiting structure 52, and the other end of the guiding rod is located above the tangent plane of the downstream roller structure 42. Thus, it can further prevent the paper jamming phenomenon caused by the gasket body 20 being unable to smoothly move between the support structure 51 and the height-limiting structure 52.

[0100] As one of the embodiments of the shaping unit 60, as Figure 14 and Figure 16 shown, the shaping unit 60 is a pair of roller bodies 401 that abut against each other, and the rotating shafts of the roller bodies 401 of the shaping unit 60 are perpendicular to the rotating shafts of the upstream roller structure 41 and the downstream roller structure 42. By rolling the folding portion 22 and the gasket body 20 near it with the pair of roller bodies 401 of the shaping unit 60, the folding portion 22 can be strengthened. For example, by squeezing the first body 201 towards the second body 202, the folding line of the folding portion 22 can be shaped to form a cushioning gasket with a cross-section approximately in the shape of a "V" as shown in Figure 1 and Figures 3 to 5 shown; or first folds 2011 and second folds 2021 that can be mutually engaged are formed on the first body 201 and the second body 202, forming a cushioning gasket with a cross-section approximately in the shape of a "Y" as shown in Figures 6 to 8 shown.

[0101] As another embodiment of the shaping unit 60, the shaping unit 60 is a pair of meshing gears, and the rotation axes of the gears are perpendicular to the rotation axes of the upstream roller structure 41 and the downstream roller structure 42. The pair of gears of the shaping unit 60 roll over the bent portion 22 and the gasket body 20 in its vicinity.

[0102] As yet another embodiment of the shaping unit 60, the shaping unit 60 is two pressing plates connected by a moving mechanism, and the moving mechanism drives the pressing plates to move along a direction parallel to the rotation axis of the downstream roller structure 42, so as to press the bent portion 22 and the gasket body 20 in its vicinity between the two pressing plates. The moving mechanism can adopt, for example, a cylinder, an oil cylinder or a linear motor, etc.

[0103] In some preferred embodiments, as Figure 14 and Figure 16 shown, the contact surface when the wrinkling unit 40 contacts the raw material sheet is perpendicular to the contact surface when the shaping unit 60 contacts the gasket body 20, so that after the shaping unit 60 rolls over at least one of the bent portion 22, the portion of the first body 201 close to the bent portion 22, and the portion of the second body 202 close to the bent portion 22, the cross-section of the buffer gasket can be made to be close to a "V" shape, or at least part of the surface of the first body 201 close to the bent portion 22 can be made to fit with at least part of the surface of the second body 202 close to the bent portion 22, so that the cross-section of the buffer gasket is in a "Y" shape. Thus, it can be ensured that the peak line 2111 and the valley line 2121 of the wrinkles formed by the wrinkling unit 40 and the creases formed by shaping are basically not parallel, so as to ensure the three-dimensionality of the prepared buffer gasket. Preferably, at least part of the portion of the shaping unit 60 for rolling over the first body 201 and the second body 202 is located above the support structure 51. Thus, it can be ensured that the shaping unit 60 can effectively shape the gasket body 20.

[0104] In some preferred embodiments, as Figures 14 to 16 shown, the central axes of the wrinkling unit 40, the bending unit 50 and the shaping unit 60 are the same central axis. Thus, it can be ensured that the prepared buffer gasket has good symmetry, so as to ensure that the buffer gasket can have a better buffering effect.

[0105] In some preferred embodiments, as Figure 18 shown, the device for manufacturing the buffer gasket further includes a control module 70; the control module 70 is configured to at least control the rotation speed of the upstream roller structure 41. Thus, by controlling the rotation speed of the upstream roller structure 41 to be slower than the rotation speed of the downstream roller structure 42 by the control module 70, the gasket body 20 between the upstream roller structure 41 and the downstream roller structure 42 can be broken due to the speed difference between the two, realizing the cutting of the gasket body 20.

[0106] In some preferred embodiments, as Figure 18 shown, the device for manufacturing the buffer cushion further includes a control module 70 and at least one set of feed roller structures 80 disposed at the feed end 101 of the upstream roller structure 41. The control module 70 is configured to at least control the rotation speed of the feed roller structures 80. Thus, the cushion body 20 between the upstream roller structure 41 and the downstream roller structure 42, or the cushion body 20 between the upstream roller structure 41 and the feed roller structures 80 can be broken due to the speed difference between the feed roller structures 80 and the upstream roller structure 41 or the downstream roller structure 42 by controlling the rotation speed of the feed roller structures 80 to be lower than that of the upstream roller structure 41 or the downstream roller structure 42 by the control module 70, thereby realizing the cutting of the cushion body 20; the cushion body 20 can also be cut by a cutting unit, and the cutting unit can be disposed at any position as required, for example, at the feed end 101 of the upstream roller structure 41, or between the upstream roller structure 41 and the downstream roller structure 42, or before the downstream roller structure 42 and the bending unit 50, or between the bending unit 50 and the shaping unit 60.

[0107] In some preferred embodiments, the device for manufacturing the buffer cushion further includes a cutting unit for cutting the cushion body 20. As one embodiment of the cutting unit, the cutting unit can be realized by the aforementioned control module 70, upstream roller structure 41 and downstream roller structure 42. Thus, the rotation speed of the upstream roller structure 41 can be controlled by the control module 70 to be slower than that of the downstream roller structure 42 to cut the cushion body 20 between the upstream roller structure 41 and the downstream roller structure 42. As another embodiment of the cutting unit, the cutting unit can be realized by the aforementioned control module 70, feed roller structures 80 and the upstream roller structure 41 or the downstream roller structure 42. Thus, the rotation speed of the feed roller structures 80 can be controlled by the control module 70 to be slower than that of the upstream roller structure 41 or the downstream roller structure 42 to cut the raw material sheet between the feed roller structures 80 and the upstream roller structure 41, or to cut the raw material sheet or the cushion body 20 between the feed roller structures 80 and the downstream roller structure 42. As yet another embodiment of the cutting unit, the cutting unit includes a motion mechanism fixedly disposed relative to the frame 30, and a cutter capable of moving driven by the motion mechanism to cut the raw material sheet or the cushion body 20. The motion mechanism can adopt a cylinder, an oil cylinder or a linear motor, etc. Thus, the cutter can cut the raw material sheet or the cushion body 20 driven by the motion mechanism, and since the cutter can move, it can move to a position that does not affect the feeding or discharging of the raw material sheet or the cushion body 20 after the cutting work is completed to ensure the smooth progress of production; and the cutting unit of this embodiment can be disposed at any position of the frame 30 as required to cut the raw material sheet or the cushion body 20 before the feed roller structures 80, upstream roller structure 41, downstream roller structure 42, bending unit 50 or shaping unit 60.

[0108] Specifically, the upstream roller structure 41, the downstream roller structure 42, and the feeding roller structure 80 all have driving devices for driving the rotation of their roller bodies 401, such as rotating motors. The control module 70 controls the rotation speed of the roller body 401 by controlling the rotation speed of the rotating motor. When the wrinkling unit 40 and the shaping unit 60 do not adopt roller structures, as long as they have driving devices, these driving devices can also be connected to the control module 70 so as to control the movement sequence of these units through the control module 70. Similarly, the cutting unit can also be connected to the control module 70 to control the cutting timing of the cutting unit through the control module 70.

[0109] In some preferred embodiments, the cutting unit is arranged at the discharging end 102 of the shaping unit 60. Thus, even after the cutting unit cuts the cushion body 20, the device for manufacturing the buffer cushion of the present invention can still continuously produce, so as to realize the automatic production of the device.

[0110] In some preferred embodiments, as Figure 16 shown, there is also a guide plate 100 arranged below the tangent plane of the two roller bodies 401 of the feeding roller structure 80, or below the tangent plane of the two roller structures 401 of the upstream roller structure 41 or the downstream roller structure 42. Thus, the guide plate 100 can provide support for the raw material sheet or the cushion body 20.

[0111] In the present invention, the realization that the extending direction of the bending portion 22 is generally arranged along the length direction of the cushion body 20 means that the included angle range between the extending direction of the bending portion 22 and the length direction of the cushion body 20 is within the included angle range between the diagonal line of the cushion body 20 and its length direction.

[0112] In the present invention, the connection or installation is a fixed connection without special emphasis. The fixed connection can be realized as a detachable connection or a non-detachable connection commonly used in the prior art. The detachable connection can be realized by the prior art, such as by means of screw connection or key connection. The non-detachable connection can also be realized by the prior art, such as by welding or gluing.

[0113] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. Buffer cushion, characterized in that, It includes at least one layer of cushion body, on which a wrinkled area is provided. The wrinkled area includes at least two wrinkles having crests and / or troughs, and all the wrinkles are arranged along the length direction of the cushion body; The cushion body has a bent portion, so as to form a first body and a second body on both sides of the cushion body where the bent portion is located respectively. The bent portion, the first body and the second body include the wrinkled area; And the bent portion, the part of the first body close to the bent portion and the part of the second body close to the bent portion are subjected to a shaping process such as rolling or extrusion, so that the cross-section of the buffer cushion is in a structure close to a "V" shape, or at least part of the surface of the first body close to the bent portion is attached to at least part of the surface of the second body close to the bent portion, so that the cross-section of the buffer cushion is in a "Y" shape; The extending direction of the bent portion is set to be substantially along the length direction of the cushion body.

2. The buffer pad according to claim 1, characterized in that, The realization that at least part of the surfaces of the first body and the second body close to the bent portion are attached to each other is as follows: The first body also has a first wrinkled place, the second body also has a second wrinkled place, and at least one first wrinkled place and at least one second wrinkled place are engaged with each other, so as to realize the attachment of part of the surfaces of the first body and the second body at the engagement place.

3. Method for preparing a buffer cushion, characterized in that, It includes the following steps: S10: Wrinkle at least one layer of raw material sheet, so as to form a wrinkled area on the raw material sheet with at least two wrinkles having crests and / or troughs and all the wrinkles are arranged along the length direction of the raw material sheet, so as to form a cushion body; S20: Bend the cushion body with a wrinkled area to form a bent portion on the cushion body, so as to form a first body and a second body on both sides of the cushion body where the bent portion is located respectively, and keep the wrinkled area on the bent portion, the first body and the second body; After step S20, there is also step S30: Shape the first body and the second body. The shaping process is realized by rolling or extruding the bent portion, the part of the first body close to the bent portion and the part of the second body close to the bent portion, so that the cross-section of the buffer cushion is in a structure close to a "V" shape; Or after step S20, there is also step S30`: Shape the first body and the second body, so that at least part of the surface of the first body close to the bent portion is attached to at least part of the surface of the second body close to the bent portion, so that the cross-section of the buffer cushion is in a "Y" shape; Wherein, the extending direction of the bent portion is substantially along the length direction of the cushion body.

4. The preparation method of the buffer cushion according to claim 3, characterized in that, In step S10, when wrinkling the raw material sheet, the peak line of the peak of the formed wrinkle and the trough line of the trough are not parallel to the length direction of the cushion body.

5. The preparation method of the buffer cushion according to claim 3, characterized in that, After step S30 or step S30`, there are also the following steps: S40: Cut the formed buffer cushion with a cross-section close to a "V" shape or a "Y" shape, and the cutting direction is not parallel to the length direction of the cushion body.

6. A device for manufacturing a buffer pad, characterized in that, It includes: Frame; A wrinkling unit of a cushion body fixedly arranged relative to the frame, for wrinkling at least one layer of raw material sheets to form a wrinkled area on the raw material sheets with at least two wrinkles having crests and / or troughs; A bending unit fixedly arranged relative to the frame, for forming a bending part on the cushion body prepared by the wrinkling unit, so as to respectively form a first body and a second body on both sides of the cushion body located at the bending part, and the wrinkled area is reserved on the bending part, the first body and the second body; And a shaping unit fixedly arranged relative to the frame, for rolling or extruding the bending part of the cushion body with a bending part obtained by the bending unit, the part of the first body close to the bending part, and the part of the second body close to the bending part, so that the cross-section of the buffer cushion is close to a "V" shape or a "Y" shape.

7. The device for manufacturing a buffer pad according to claim 6, characterized in that, The wrinkling unit includes at least a pair of upstream roller structures and at least a pair of downstream roller structures, and the rotational speed of the downstream roller structure is set to be lower than that of the upstream roller structure; and / or The bending unit includes a support structure for supporting the bottom surface of the cushion body, a height limiting structure for restricting the upward movement of the cushion body, and a bending structure for bending the cushion body upward.

8. The apparatus for manufacturing a buffer pad according to claim 7, characterized in that, At least one roller body in the upstream roller structure and the downstream roller structure is arranged on the frame through a swing mechanism, and a pressure applying unit for applying pressure to the swing mechanism is further arranged on the frame so that the roller body abuts against the outer periphery of another roller body in the same set of roller structures.

9. The device for manufacturing a buffer pad according to claim 7, characterized in that, The surfaces of the support structure and the height limiting structure in contact with the cushion body are both located below the tangent plane of the downstream roller structure; and / or The height limiting structure is located on the central axis of the downstream roller structure parallel to the feeding direction.

10. The device for manufacturing a buffer pad according to claim 9, characterized in that, The bending unit further includes a guiding mechanism for guiding the cushion body from the wrinkling unit to between the support structure and the height limiting structure.

11. The device for manufacturing a buffer pad according to claim 9, characterized in that, The bending structure includes at least a group of first limiting plates respectively arranged on both sides of the downstream roller structure, and the distance between the first limiting plates on both sides of the downstream roller structure in a group along the horizontal plane perpendicular to the discharging direction decreases along the discharging direction.

12. The device for manufacturing a buffer pad according to any one of claims 7 to 11, characterized in that, The contact surface of the wrinkling unit when contacting the raw material sheets is perpendicular to the contact surface of the shaping unit when contacting the cushion body, so that after the shaping unit rolls the bending part, the part of the first body close to the bending part, and the part of the second body close to the bending part, the cross-section of the buffer cushion can be close to a "V" shape, or at least part of the surface of the first body close to the bending part can be attached to at least part of the surface of the second body close to the bending part, so that the cross-section of the buffer cushion is in a "Y" shape.

13. The device for manufacturing a buffer pad according to claim 12, characterized in that, At least part of the part of the shaping unit for rolling the first body and the second body is located above the support structure.

14. The device for manufacturing a buffer pad according to any one of claims 7 to 11, characterized in that, It further includes a control module; the control module is set to at least control the rotational speed of the upstream roller structure; or It further includes a control module and at least one set of feed roller structures disposed at the feed end of the upstream roller structure, and the control module is configured to at least control the rotational speed of the feed roller structures; or It further includes a cutting unit for cutting the gasket body.

15. The device for manufacturing a buffer pad according to claim 12, characterized in that, It further includes a control module; the control module is configured to at least control the rotational speed of the upstream roller structure; or It further includes a control module and at least one set of feed roller structures disposed at the feed end of the upstream roller structure, and the control module is configured to at least control the rotational speed of the feed roller structures; or It further includes a cutting unit for cutting the gasket body.

16. The device for manufacturing a buffer pad according to claim 13, characterized in that, It further includes a control module; the control module is configured to at least control the rotational speed of the upstream roller structure; or It further includes a control module and at least one set of feed roller structures disposed at the feed end of the upstream roller structure, and the control module is configured to at least control the rotational speed of the feed roller structures; or It further includes a cutting unit for cutting the gasket body.

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