Pre-folded paper pad

Abstract

The utility model discloses a pre-folded paper pad which comprises a bottom face and two folding faces, the width of the head of the bottom face is smaller than that of the non-head of the bottom face, and the overall width of the heads of the two folding faces is smaller than that of the non-head of the two folding faces. According to the pre-folded paper pad, due to the fact that the width of the head of the bottom face of the pre-folded paper pad and the overall width of the heads of the two folding faces are synchronously reduced, when paper is fed, friction between the head of the pre-folded paper pad and the inner wall of a runner of a paper pad forming machine is small, and the deformation counter-acting force of paper is reduced; the forming gear at the runner outlet of the paper pad forming machine can almost clamp paper on the upper layer and the lower layer of the paper feeding head of the pre-folded paper pad at the same time, meanwhile, the upper layer and the lower layer of the paper feeding head of the pre-folded paper pad are pulled to achieve feeding, paper feeding is synchronously conducted above and below an inner runner of the paper pad forming machine, smooth paper feeding is guaranteed, and the production efficiency is improved. And smooth forming of a pillow-shaped three-dimensional cushion material in the paper cushion forming machine can be ensured.

Description

Technical Field

[0001] The utility model relates to the field of logistics packaging, in particular to a pre-folded paper pad. Background Art

[0002] In logistics transportation, items will be cushioned and packaged. Cushioning materials are placed in packaging boxes or bags. Pillow-shaped three-dimensional paper pads are one of them. The pre-folded paper pads pass through the inner and outer flow channels of the paper pad forming machine to form pillow-shaped three-dimensional paper pads. The raw materials of the pre-folded paper pads are a middle surface and folded surfaces on both sides of the middle surface. The two folded surfaces are folded toward the middle surface, and the edges of the two folded surfaces are spaced apart, aligned exactly, or have overlapping areas.

[0003] The current pre-folded paper pad, when putting the pre-folded paper pad into the inner flow channel and the outer flow channel of the paper pad forming machine, due to the certain width of the paper material, the pre-folded paper pad has a large contact area with the outer flow channel when being fed in, and the pre-folded paper pad is deformed while being fed in. The resistance of the flow channel and the resistance of the paper material deformation are both large, resulting in a slow paper feeding speed, the pre-folded paper pad is easy to be skewed, and the efficiency is low. Therefore, the head of the pre-folded paper pad is usually processed. The current processing method is: first flatten the head (front end) of the pre-folded paper pad, then fold the head into a triangle, and then restore it to the pre-folded state. When the pre-folded paper pad is fed, the width of the head is greatly reduced compared to before, so that when the pre-folded paper pad is fed in, the head width is greatly reduced. The friction between the head of the folded paper pad and the inner wall of the flow channel is relatively small, which also reduces the deformation reaction force of the paper and improves the smoothness of paper feeding. However, when feeding paper, the paper on the middle surface of the head of the pre-folded paper pad will be clamped by the forming gear of the paper pad forming machine and conveyed forward first, and the paper on the folded side of the head of the pre-folded paper pad will not be clamped by the forming gear immediately. It needs to move a certain distance in the flow channel before it is clamped due to deformation and forming. During the movement, the folded side of the pre-folded paper pad originally located above the inner flow channel may be pulled to the bottom of the inner flow channel due to the resistance of the flow channel and the deformation force driven by the flow channel, thereby making it impossible to form the pillow-shaped three-dimensional pad material, resulting in forming failure.

[0004] Therefore, how to overcome the above technical defects is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a pre-folded paper pad to solve at least one of the above technical problems.

[0006] According to one aspect of the utility model, a pre-folded paper pad is provided, comprising a bottom surface and two folding surfaces, wherein the two folding surfaces are respectively connected to two sides of the bottom surface, and the two folding surfaces are folded on the bottom surface.

[0007] The width of the head portion of the bottom surface is smaller than the width of the non-head portion of the bottom surface, and the overall width of the heads of the two folded surfaces is smaller than the overall width of the non-head portions of the two folded surfaces.

[0008] The front end of the head of the bottom surface is pointed or flat, and / or the front end of the head of the folded surface is pointed or flat.

[0009] The pre-folded paper pad of the utility model reduces the width of the head of the bottom surface of the pre-folded paper pad and the overall width of the heads of the two folded surfaces simultaneously, that is, reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad simultaneously, so that when paper is fed, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is small, the deformation reaction force of the paper material is reduced, the smoothness of paper feeding is improved, and the forming gear at the flow channel outlet of the paper pad forming machine can clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad almost at the same time, and at the same time pull the pre-folded paper pad The "upper and lower layers" of the paper feeding head realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are fed synchronously, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine. In addition, as long as the width of the head part of the bottom surface is ensured to be smaller than the width of the non-head part of the bottom surface, and the overall width of the heads of the two folding surfaces is smaller than the overall width of the non-head parts of the two folding surfaces, the front end style of the head part of the bottom surface can be pointed or flat, and the front end style of the head part of the folding surface can be pointed or flat.

[0010] In some embodiments, a connection portion between the folded surface and the bottom surface close to the front end of the bottom surface may be separated.

[0011] Therefore, in this case, both sides of a section of the bottom surface close to the front end of the bottom surface can be folded toward the middle of the bottom surface to reduce the width of the bottom surface head, and both sides of the bottom surface can be inclined toward the middle of the bottom surface to reduce the width of the bottom surface head, and a section of the folded surface close to the front end of the bottom surface can be folded toward the middle of the bottom surface to reduce the overall width of the folded surface head, and both sides of the folded surface away from the middle of the bottom surface can be inclined toward the middle of the bottom surface to reduce the overall width of the folded surface head.

[0012] In some embodiments, the head of the bottom surface may be in a folded shape and / or the head of the folded surface may be in a folded shape.

[0013] Thus, the head of the bottom surface in a folded shape can reduce the width of the head of the bottom surface, and the head of the folded surface in a folded shape can reduce the overall width of the head of the folded surface.

[0014] In some embodiments, both sides of the head of the bottom surface may be inclined toward the middle of the bottom surface and the inclination angles are α1 and α2, respectively, 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees,

[0015] The side of the head of the folded surface 2 away from the middle of the bottom surface 1 can be inclined toward the middle of the bottom surface, and the inclination angles are β1 and β2, respectively, 0 degree < β1 < 90 degrees, 0 degree < β2 < 90 degrees.

[0016] Therefore, the two sides of the head of the bottom surface are inclined toward the middle of the bottom surface by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the width of the head of the bottom surface, and the side edges of the head of the folded surface away from the middle of the bottom surface are inclined toward the middle of the bottom surface by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the overall width of the head of the folded surface.

[0017] In some embodiments, 20 degrees ≤ α1 ≤ 70 degrees, 20 degrees ≤ α2 ≤ 70 degrees, 20 degrees ≤ β1 ≤ 70 degrees, and 20 degrees ≤ β2 ≤ 70 degrees.

[0018] Therefore, the two sides of the head of the bottom surface are inclined 20 degrees to 70 degrees toward the middle of the bottom surface and the side edges of the head of the folding surface away from the middle of the bottom surface are inclined 20 degrees to 70 degrees toward the middle of the bottom surface, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0019] In some embodiments, 40 degrees ≤ [α1 or α2 + β1 or β2] ≤ 140 degrees.

[0020] Therefore, the total inclination angle of one side of the head of the bottom surface toward the middle of the bottom surface and the inclination angle of the side of the head of the folded surface away from the middle of the bottom surface toward the middle of the bottom surface is 40 degrees to 140 degrees, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to realize feeding.

[0021] In some embodiments, when the width of the outlet of the flow channel of a paper pad forming machine suitable for pre-folded paper pads is A, the width of the head of the bottom surface is greater than or equal to zero and less than or equal to 1.2A, and the overall width of the heads of the two folded surfaces is greater than or equal to zero and less than or equal to 1.2A.

[0022] Therefore, the width of the front end of the bottom surface and the overall width of the front ends of the two folded surfaces are slightly larger than the width of the outlet of the flow channel, which can also ensure smooth paper feeding.

[0023] In some embodiments, when the convergence angle of one side wall of the flow channel of a paper pad forming machine suitable for pre-folded paper pads is B1 and the convergence angle of the other side wall is B2, 0 degrees ≤ [α1+α2] ≤ [B1+B2+30 degrees], 0 degrees ≤ [β1+β2] ≤ [B1+B2+30 degrees].

[0024] Therefore, when the two sides of the head of the bottom surface are inclined toward the middle of the bottom surface by a total of 0 degrees to [B1+B2+30 degrees] and the side edges of the heads of the two folded surfaces away from the middle of the bottom surface are inclined toward the middle of the bottom surface by a total of 0 degrees to [B1+B2+30 degrees], that is, when the folding amplitude of the head of the pre-folded paper pad is slightly larger than the folding amplitude of the two side walls of the flow channel, smooth paper feeding can also be ensured.

[0025] In some embodiments, a section of the connection between the head portion of the folded surface and the non-head portion of the folded surface may be separated, and the separation area starts from the side edge of the folded surface away from the middle of the bottom surface.

[0026] Therefore, in this case, a section of the folded surface close to the front end of the bottom surface head can be folded toward the middle of the bottom surface to reduce the overall width of the folded surface head.

[0027] In some embodiments, the area between the two folded surfaces may be flat.

[0028] Therefore, in this way, it is ensured that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding the paper, thereby ensuring smooth paper feeding.

[0029] In some embodiments, the shape and size of the head portion of the bottom surface may be the same as the overall shape and size of the heads of the two folded surfaces.

[0030] Therefore, in this way, it can be ensured that the forming gear of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The style of the existing pre-folded paper pads;

[0032] Figure 2 A processing style for the head of an existing pre-folded paper pad;

[0033] Figure 3 This is a schematic structural diagram of a pre-folded paper pad according to an embodiment of the utility model;

[0034] Figure 4 This is a schematic structural diagram of a pre-folded paper pad according to a second embodiment of the present invention;

[0035] Figure 5 This is a schematic structural diagram of a pre-folded paper pad according to a third embodiment of the present utility model;

[0036] Figure 6 This is a schematic structural diagram of a pre-folded paper pad according to a fourth embodiment of the present invention;

[0037] Figure 7This is a schematic structural diagram of a pre-folded paper pad according to a fifth embodiment of the present invention;

[0038] Figure 8 This is a schematic structural diagram of a pre-folded paper pad according to a sixth embodiment of the present invention;

[0039] Fig. 9 This is a schematic structural diagram of a pre-folded paper pad according to a seventh embodiment of the present invention;

[0040] Fig.10 This is a schematic structural diagram of a pre-folded paper pad according to an eighth embodiment of the present utility model;

[0041] Fig.11 This is a state diagram of the assembly of a pre-folded paper pad and a flow channel according to one embodiment of the utility model. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0043] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0044] Figure 1 The style of the existing pre-folded paper pads.

[0045] refer to Figure 1 The existing pre-folded paper pad includes a middle surface 100 and two folding surfaces 200 located on both sides of the middle surface 100. The two folding surfaces 200 are folded toward the middle surface 100, and there is a gap, alignment or overlap between the edges of the two folding surfaces 200 along the length direction of the middle surface 100.

[0046] Figure 2 The processing style for the head of the existing pre-folded paper pad.

[0047] refer to Figure 2, first flatten the head (front end) of the pre-folded paper pad, then fold the head into a triangle, and then restore it to the pre-folded state. The width of the head of the pre-folded paper pad is greatly reduced, so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, and the deformation reaction force of the paper material is also reduced, which can improve the smoothness of paper loading. However, when loading paper, the paper material on the middle surface of the head of the pre-folded paper pad will be clamped by the forming gear of the paper pad forming machine and conveyed forward first, and the paper material on the folded side of the head of the pre-folded paper pad will not be clamped by the forming gear immediately, and it needs to move a certain distance in the flow channel before it will be clamped due to deformation and forming. During the movement, the folded side part of the pre-folded paper pad originally located above the inner flow channel is likely to be pulled to the bottom of the inner flow channel due to the resistance of the flow channel and the deformation force driven by the flow channel, thereby resulting in the inability to form the pillow-shaped three-dimensional pad material and causing forming failure.

[0048] Embodiment 1:

[0049] Figure 3 The structure of a pre-folded paper pad according to an embodiment of the utility model is schematically shown.

[0050] refer to Figure 3 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0051] refer to Figure 3 The head 101 of the bottom surface 1 refers to the area from the two sides of the bottom surface 1 to the inclined part of the middle of the bottom surface 1 to the front end of the bottom surface 1, that is, Figure 3 The non-head 102 of the bottom surface 1 refers to the area of ​​the bottom surface 1 excluding the head 101; the head 201 of the folded surface 2 refers to the area from the side of the folded surface 2 away from the middle of the bottom surface 1 to the part of the bottom surface 1 inclined to the front end of the folded surface 2, that is, Figure 3 The non-head portion 202 of the folded surface 2 with a length L refers to the area of ​​the folded surface 2 excluding the head portion 201 .

[0052] refer to Figure 3 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0053] refer to Figure 3In this embodiment, the folding surface 2 and the bottom surface 1 are connected at a section near the front end of the bottom surface 1 in a separated state, and the two sides of the bottom surface 1 located at the connection section are folded toward the middle of the bottom surface 1 (in this embodiment, the edges of the folded portion along the length direction of the bottom surface 1 are aligned), so that the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface 1 and the inclination angles are α1 and α2 (not shown), 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees, and the side edges of the two folding surfaces 2 located at the connection section away from the middle of the bottom surface 1 are folded toward the middle of the bottom surface 1 respectively (the folded portion can be located between the folding surface 2 and the bottom surface 1, and can also be located above the folding surface 2. In this embodiment, In the embodiment, the folded portion is located between the folding surface 2 and the bottom surface 1), so that the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 and the inclination angles are β1 (not shown) and β2 respectively, 0 degrees < β1 < 90 degrees, 0 degrees < β2 < 90 degrees, and the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the width of the head 101 of the bottom surface 1, and the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the overall width of the heads 201 of the two folding surfaces 2.

[0054] refer to Figure 3 As long as the width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, and the overall width of the heads 201 of the two folding surfaces 2 is smaller than the overall width of the non-heads 202 of the two folding surfaces 2, the front end of the head 101 of the bottom surface 1 can be pointed or flat, and the front end of the head 201 of the folding surface 2 can be pointed or flat. In this embodiment, the front end of the head 101 of the bottom surface 1 is pointed, and the front end of the head 201 of the folding surface 2 is also pointed.

[0055] refer to Figure 3 The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0056] refer to Figure 3The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0057] The angle range of α1 can be preferably selected as: 20 degrees ≤ α1 ≤ 70 degrees, the angle range of α2 can be preferably selected as: 20 degrees ≤ α2 ≤ 70 degrees, the angle range of β1 can be preferably selected as: 20 degrees ≤ β1 ≤ 70 degrees, the angle range of β2 can be preferably selected as: 20 degrees ≤ β2 ≤ 70 degrees, the two sides of the head 101 of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1 and the side edges of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to realize feeding. In other embodiments, the range of the sum of α1 or α2 and β1 or β2 may also be: 40 degrees ≤ [α1+β1] ≤ 140 degrees, 40 degrees ≤ [α1+β2] ≤ 140 degrees, 40 degrees ≤ [α2+β1] ≤ 140 degrees or 40 degrees ≤ [α2+β2] ≤ 140 degrees. In this case, the angle at which one side of the head 101 of the bottom surface 1 is inclined toward the middle of the bottom surface 1 and the angle at which the side of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 is inclined toward the middle of the bottom surface 1 totaling 40 degrees to 140 degrees can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0058] Embodiment 2:

[0059] Figure 4 The structure of the pre-folded paper pad according to the second embodiment of the utility model is schematically shown.

[0060] refer to Figure 4 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0061] In this embodiment, the areas indicated by the head 101 and the non-head 102 of the bottom surface 1 are the same as those in the first embodiment, and the areas indicated by the head 201 and the non-head 202 of the folding surface 2 are the same as those in the first embodiment, which will not be repeated here.

[0062] refer to Figure 4 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0063] refer to Figure 4 In this embodiment, a connection portion of the folded surface 2 and the bottom surface 1 close to the front end of the bottom surface 1 is separated, and the two sides of the bottom surface 1 located at the connection portion are folded toward the middle of the bottom surface 1 (in this embodiment, the folded portion is overlapped up and down to make the front end of the bottom surface 1 pointed), so that the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface 1 and the inclination angles are α1 and α2 (not shown), 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees, and the side edges of the two folded surfaces 2 located at the connection portion away from the middle of the bottom surface 1 are respectively folded toward the middle of the bottom surface 1 (in this embodiment, the folded portion is from between the folded surface 2 and the bottom surface 1 Folded to the top of the folding surface 2), so that the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 and the inclination angles are β1 (not shown) and β2 respectively, 0 degree < β1 < 90 degrees, 0 degree < β2 < 90 degrees, the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the width of the head 101 of the bottom surface 1, and the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the overall width of the heads 201 of the two folding surfaces 2.

[0064] refer to Figure 4 As long as the width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, and the overall width of the heads 201 of the two folding surfaces 2 is smaller than the overall width of the non-heads 202 of the two folding surfaces 2, the front end of the head 101 of the bottom surface 1 can be pointed or flat, and the front end of the head 201 of the folding surface 2 can be pointed or flat. In this embodiment, the front end of the head 101 of the bottom surface 1 is pointed, and the front end of the head 201 of the folding surface 2 is also pointed.

[0065] refer to Figure 4The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0066] refer to Figure 4 The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0067] The angle range of α1 can be preferably selected as: 20 degrees ≤ α1 ≤ 70 degrees, 20 degrees ≤ α2 ≤ 70 degrees, the angle range of β1 can be preferably selected as: 20 degrees ≤ β1 ≤ 70 degrees, the angle range of β2 can be preferably selected as: 20 degrees ≤ β2 ≤ 70 degrees, the two sides of the head 101 of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1 and the side edges of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to realize feeding. In other embodiments, the range of the sum of α1 or α2 and β1 or β2 may also be: 40 degrees ≤ [α1+β1] ≤ 140 degrees, 40 degrees ≤ [α1+β2] ≤ 140 degrees, 40 degrees ≤ [α2+β1] ≤ 140 degrees or 40 degrees ≤ [α2+β2] ≤ 140 degrees. In this case, the angle at which one side of the head 101 of the bottom surface 1 is inclined toward the middle of the bottom surface 1 and the angle at which the side of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 is inclined toward the middle of the bottom surface 1 totaling 40 degrees to 140 degrees can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0068] Embodiment three:

[0069] Figure 5 The structure of the pre-folded paper pad according to the third embodiment of the utility model is schematically shown.

[0070] refer to Figure 5The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0071] In this embodiment, the areas indicated by the head 101 and the non-head 102 of the bottom surface 1 are the same as those in the first embodiment, and the areas indicated by the head 201 and the non-head 202 of the folding surface 2 are the same as those in the first embodiment, which will not be repeated here.

[0072] refer to Figure 5 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0073] refer to Figure 5 In this embodiment, the front end of the head 101 of the bottom surface 1 is in a flat head shape, and the front end of the head 201 of the folding surface 2 is also in a flat head shape.

[0074] refer to Figure 5 In this embodiment, a connection portion between the folded surface 2 and the bottom surface 1 close to the front end of the bottom surface 1 is separated, and the two sides of the bottom surface 1 located at the connection portion are folded toward the middle of the bottom surface 1 (in this embodiment, the folded parts are overlapped up and down so that the front end of the head 101 of the bottom surface 1 is flat), so that the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface 1 and the inclination angles are α1 and α2 (not shown), 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees, and the side edges of the two folded surfaces 2 located at the connection portion away from the middle of the bottom surface 1 are respectively folded toward the middle of the bottom surface 1 (in this embodiment, the folded parts are from the folded surface 2 and the bottom surface 1 to the front end of the bottom surface 1). 1 to the top of the folding surface 2), so that the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 and the inclination angles are β1 (not shown) and β2 respectively, 0 degree < β1 < 90 degrees, 0 degree < β2 < 90 degrees, both sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface by 0 degree to 90 degrees (excluding 0 degree and 90 degrees) to reduce the width of the head 101 of the bottom surface 1, and the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 by 0 degree to 90 degrees (excluding 0 degree and 90 degrees) to reduce the overall width of the heads 201 of the two folding surfaces 2.

[0075] refer to Figure 5The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0076] refer to Figure 5 The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0077] The angle range of α1 can be preferably selected as: 20 degrees ≤ α1 ≤ 70 degrees, the angle range of α2 can be preferably selected as: 20 degrees ≤ α2 ≤ 70 degrees, the angle range of β1 can be preferably selected as: 20 degrees ≤ β1 ≤ 70 degrees, the angle range of β2 can be preferably selected as: 20 degrees ≤ β2 ≤ 70 degrees, the two sides of the head 101 of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1 and the side edges of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to realize feeding. In other embodiments, the range of the sum of α1 or α2 and β1 or β2 may also be: 40 degrees ≤ [α1+β1] ≤ 140 degrees, 40 degrees ≤ [α1+β2] ≤ 140 degrees, 40 degrees ≤ [α2+β1] ≤ 140 degrees or 40 degrees ≤ [α2+β2] ≤ 140 degrees. In this case, the angle at which one side of the head 101 of the bottom surface 1 is inclined toward the middle of the bottom surface 1 and the angle at which the side of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 is inclined toward the middle of the bottom surface 1 totaling 40 degrees to 140 degrees can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0078] Embodiment 4:

[0079] Figure 6 The structure of the pre-folded paper pad according to the fourth embodiment of the present invention is schematically shown.

[0080] refer to Figure 6 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0081] In this embodiment, the areas indicated by the head 101 and the non-head 102 of the bottom surface 1 are the same as those in the first embodiment, and the areas indicated by the head 201 and the non-head 202 of the folding surface 2 are the same as those in the first embodiment, which will not be repeated here.

[0082] refer to Figure 6 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0083] refer to Figure 6 In this embodiment, the folding surface 2 and the bottom surface 1 are connected at a section near the front end of the bottom surface 1 in a separated state, and the two sides of the bottom surface 1 located at the connection section are folded toward the middle of the bottom surface 1 (in this embodiment, the folded portion is cut off, and in other embodiments, the edges of the folded portion along the length direction of the bottom surface 1 are aligned), so that the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface 1 and the inclination angles are α1 and α2 (not shown), 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees, and the side edges of the two folding surfaces 2 located at the connection section away from the middle of the bottom surface 1 are respectively folded toward the middle of the bottom surface 1 (in this embodiment, the folded portion is cut off, and in other embodiments, the folded portion The head 101 of the two folding surfaces 2 may also be located between the folding surface 2 and the bottom surface 1, or may be located above the folding surface 2), so that the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 and the inclination angles are β1 (not shown) and β2, respectively, 0 degrees < β1 < 90 degrees, 0 degrees < β2 < 90 degrees, both sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the width of the head 101 of the bottom surface 1, and the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the overall width of the heads 201 of the two folding surfaces 2.

[0084] refer to Figure 6In this embodiment, the front end of the head 101 of the bottom surface 1 is pointed, and the front ends of the heads 201 of the two folding surfaces 2 are flat. The heads 201 of the folding surfaces 2 can be formed into a flat head by a cutting machine or other cutting devices. In order to ensure that the forming gears at the flow channel outlet of the paper pad forming machine can clamp the "upper and lower layers" of the paper feeding head of the pre-folded paper pad almost at the same time, the area where the heads 201 of the folding surfaces 2 are cut should not be too large, and the head 101 of the bottom surface 1 can be slightly exposed.

[0085] refer to Figure 6 The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0086] refer to Figure 6 The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0087] The angle range of α1 can be preferably selected as: 20 degrees ≤ α1 ≤ 70 degrees, the angle range of α2 can be preferably selected as: 20 degrees ≤ α2 ≤ 70 degrees, the angle range of β1 can be preferably selected as: 20 degrees ≤ β1 ≤ 70 degrees, the angle range of β2 can be preferably selected as: 20 degrees ≤ β2 ≤ 70 degrees, the two sides of the head 101 of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1 and the side edges of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to realize feeding. In other embodiments, the range of the sum of α1 or α2 and β1 or β2 may also be: 40 degrees ≤ [α1+β1] ≤ 140 degrees, 40 degrees ≤ [α1+β2] ≤ 140 degrees, 40 degrees ≤ [α2+β1] ≤ 140 degrees or 40 degrees ≤ [α2+β2] ≤ 140 degrees. In this case, the angle at which one side of the head 101 of the bottom surface 1 is inclined toward the middle of the bottom surface 1 and the angle at which the side of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 is inclined toward the middle of the bottom surface 1 totaling 40 degrees to 140 degrees can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0088] Embodiment five:

[0089] Figure 7 The structure of the pre-folded paper pad according to the fifth embodiment of the utility model is schematically shown.

[0090] refer to Figure 7 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0091] In this embodiment, the areas indicated by the head 101 and the non-head 102 of the bottom surface 1 are the same as those in the first embodiment, and the areas indicated by the head 201 and the non-head 202 of the folding surface 2 are the same as those in the first embodiment, which will not be repeated here.

[0092] refer to Figure 7 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0093] refer to Figure 7In this embodiment, the folding surface 2 and the bottom surface 1 are connected at a section near the front end of the bottom surface 1 in a separated state, and the two sides of the bottom surface 1 located at the connection section are folded toward the middle of the bottom surface 1 (in this embodiment, the folded portion is cut off, and in other embodiments, the edges of the folded portion along the length direction of the bottom surface 1 are aligned), so that the two sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface 1 and the inclination angles are α1 and α2 (not shown), 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees, and the side edges of the two folding surfaces 2 located at the connection section away from the middle of the bottom surface 1 are respectively folded toward the middle of the bottom surface 1 (in this embodiment, the folded portion is cut off, and in other embodiments, the folded portion The head 101 of the two folding surfaces 2 may also be located between the folding surface 2 and the bottom surface 1, or may be located above the folding surface 2), so that the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 and the inclination angles are β1 (not shown) and β2, respectively, 0 degrees < β1 < 90 degrees, 0 degrees < β2 < 90 degrees, both sides of the head 101 of the bottom surface 1 are inclined toward the middle of the bottom surface by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the width of the head 101 of the bottom surface 1, and the side edges of the heads 201 of the two folding surfaces 2 away from the middle of the bottom surface 1 are respectively inclined toward the middle of the bottom surface 1 by 0 degrees to 90 degrees (excluding 0 degrees and 90 degrees) to reduce the overall width of the heads 201 of the two folding surfaces 2.

[0094] refer to Figure 7 In this embodiment, the front end of the head 101 of the bottom surface 1 is flat-headed, and the front ends of the heads 201 of the two folding surfaces 2 are both flat-headed. The front end of the head 101 of the bottom surface 1 can be formed into a flat-head shape by a cutting machine or other cutting devices, and the front end of the head 201 of the folding surface 2 can be formed into a flat-head shape by a cutting machine or other cutting devices.

[0095] refer to Figure 7 The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0096] refer to Figure 7The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0097] The angle range of α1 can be preferably selected as: 20 degrees ≤ α1 ≤ 70 degrees, the angle range of α2 can be preferably selected as: 20 degrees ≤ α2 ≤ 70 degrees, the angle range of β1 can be preferably selected as: 20 degrees ≤ β1 ≤ 70 degrees, the angle range of β2 can be preferably selected as: 20 degrees ≤ β2 ≤ 70 degrees, the two sides of the head 101 of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1 and the side edges of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to realize feeding. In other embodiments, the range of the sum of α1 or α2 and β1 or β2 may also be: 40 degrees ≤ [α1+β1] ≤ 140 degrees, 40 degrees ≤ [α1+β2] ≤ 140 degrees, 40 degrees ≤ [α2+β1] ≤ 140 degrees or 40 degrees ≤ [α2+β2] ≤ 140 degrees. In this case, the angle at which one side of the head 101 of the bottom surface 1 is inclined toward the middle of the bottom surface 1 and the angle at which the side of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 is inclined toward the middle of the bottom surface 1 totaling 40 degrees to 140 degrees can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0098] Embodiment six:

[0099] Figure 8 The structure of a pre-folded paper pad according to a sixth embodiment of the present invention is schematically shown.

[0100] refer to Figure 8 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0101] refer to Figure 8, the head 101 of the bottom surface 1 refers to Figure 8 The non-head portion 102 of the bottom surface 1 refers to the area of ​​the bottom surface 1 excluding the head portion 101; the head portion 201 of the folded surface 2 refers to the area of ​​the bottom surface 1 excluding the head portion 101. Figure 8 The non-head portion 202 of the folded surface 2 is a portion of the front end of the folded surface 2 with a length L1, and refers to the area of ​​the folded surface 2 excluding the head portion 201 .

[0102] refer to Figure 8 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0103] refer to Figure 8 In this embodiment, a connection portion between the folding surface 2 and the bottom surface 1 near the front end of the bottom surface 1 is in a separated state, and the two connection portions between the head portion 101 of the bottom surface 1 and the non-head portion 102 of the bottom surface 1 are in a separated state, and the separation area starts from both sides of the bottom surface 1 to the middle of the bottom surface 1, and the two sides of a section of the bottom surface 1 near the front end of the bottom surface 1 are folded toward the middle of the bottom surface 1 to reduce the width of the head portion 101 of the bottom surface 1, and a connection portion between the head portion 201 of a folding surface 2 and the non-head portion 202 of the folding surface 2 is also in a separated state, and the separation area starts from the side edge of the folding surface 2 away from the middle of the bottom surface 1, and the separation area starts from the side edge of the folding surface 2 away from the middle of the bottom surface 1, and the separation area starts from the side edge of the folding surface 2 near the front end of the bottom surface 1. A section of the folded surface 2 at one end is folded toward the middle of the bottom surface 1 to reduce the width of the head 201 of the folded surface 2, a section of the connection between the head 201 of the other folded surface 2 and the non-head 202 of the folded surface 2 is also separated and the separation area starts from the side of the folded surface 2 away from the middle of the bottom surface 1, a section of the folded surface 2 close to the front end of the bottom surface 1 can be folded toward the middle of the bottom surface 1 to reduce the width of the head 201 of the folded surface 2, thereby reducing the overall width of the heads 201 of the two folded surfaces 2, preferably, the width of the head 101 of the bottom surface 1 is equivalent to the overall width of the heads 201 of the two folded surfaces 2.

[0104] refer to Figure 8 In this embodiment, the front end of the head 101 of the bottom surface 1 is flat, and the front ends of the heads 201 of the two folding surfaces 2 are both flat.

[0105] refer to Figure 8 The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0106] refer to Figure 8 The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0107] Embodiment seven:

[0108] Fig. 9 The structure of the pre-folded paper pad according to the seventh embodiment of the present invention is schematically shown.

[0109] refer to Fig. 9 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0110] refer to Fig. 9 , the head 101 of the bottom surface 1 refers to Fig. 9 The non-head portion 102 of the bottom surface 1 refers to the area of ​​the bottom surface 1 excluding the head portion 101; the head portion 201 of the folded surface 2 refers to the area of ​​the bottom surface 1 excluding the head portion 101. Fig. 9 The non-head portion 202 of the folded surface 2 is a portion of the front end of the folded surface 2 with a length L2, and refers to the area of ​​the folded surface 2 excluding the head portion 201 .

[0111] refer to Fig. 9 The width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1, the width of the head 201 of one fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, and the width of the head 201 of the other fold surface 2 is smaller than the width of the non-head 202 of the fold surface 2, that is, the overall width of the two heads 201 of the two fold surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two fold surfaces 2.

[0112] refer to Fig. 9In this embodiment, the head 101 of the bottom surface 1 is trapezoidal, and the maximum width of the head 101 of the bottom surface 1 (the width of the front end of the head 101 of the bottom surface 1) is smaller than the width of the non-head 102 of the bottom surface 1. In this embodiment, both sides of the head 101 of the bottom surface 1 are inclined from the front end of the bottom surface 1 to the middle of the bottom surface 1, and the inclination angles are γ1 and γ2 (not shown), 0 degrees <γ1 <90 degrees, 0 degrees <γ2 <90 degrees, the heads 201 of the two folding surfaces 2 are both trapezoidal, and the two folding surfaces 2 are together trapezoidal, and the side edges of the two folding surfaces 2 away from the middle of the bottom surface 1 are inclined from the front end of the folding surfaces 2 to the middle of the bottom surface 1, and the inclination angles are θ1 (not shown) and θ2, 0 degrees <θ1 <90 degrees, 0 degrees <θ2 <90 degrees.

[0113] In this embodiment, the shape and size of the head portion 101 of the bottom surface 1 are the same as the overall shape and size of the head portions 201 of the two folded surfaces 2 .

[0114] refer to Fig. 9 In this embodiment, the front end of the head 101 of the bottom surface 1 is flat, and the front ends of the heads 201 of the two folding surfaces 2 are both flat.

[0115] refer to Fig. 9 The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0116] refer to Fig. 9 The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0117] The angle range of γ1 can be preferably selected as: 20 degrees ≤ γ1 ≤ 70 degrees, the angle range of γ2 can be preferably selected as: 20 degrees ≤ γ2 ≤ 70 degrees, the angle range of θ1 can be preferably selected as: 20 degrees ≤ θ1 ≤ 70 degrees, the angle range of θ2 can be preferably selected as: 20 degrees ≤ θ2 ≤ 70 degrees, the two sides of the head 101 of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1 and the side edges of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 are inclined 20 degrees to 70 degrees toward the middle of the bottom surface 1, which can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding. In other embodiments, the range of the sum of γ1 or γ2 and θ1 or θ2 may also be: 40 degrees ≤ [γ1+θ1] ≤ 140 degrees, 40 degrees ≤ [γ1+θ2] ≤ 140 degrees, 40 degrees ≤ [γ2+θ1] ≤ 140 degrees or 40 degrees ≤ [γ2+θ2] ≤ 140 degrees. In this case, the angle at which one side of the head 101 of the bottom surface 1 is inclined toward the middle of the bottom surface 1 and the angle at which the side of the head 201 of the folding surface 2 away from the middle of the bottom surface 1 is inclined toward the middle of the bottom surface 1 totaling 40 degrees to 140 degrees can ensure that the forming gears of the paper pad forming machine can simultaneously clamp the paper of the "upper and lower layers" of the pre-folded paper pad feeding head, and simultaneously pull the "upper and lower layers" of the pre-folded paper pad feeding head to achieve feeding.

[0118] Fig.10 The structure of the pre-folded paper pad according to the eighth embodiment of the present invention is schematically shown.

[0119] refer to Fig.10 The pre-folded paper pad comprises a bottom surface 1 and two folding surfaces 2. The two folding surfaces 2 are respectively connected to two sides of the bottom surface 1 in one piece, and the two folding surfaces 2 are folded on the bottom surface 1.

[0120] refer to Fig.10 , the head 101 of the bottom surface 1 refers to Fig.10 The non-head portion 102 of the bottom surface 1 refers to the area of ​​the bottom surface 1 excluding the head portion 101; the head portion 201 of the folded surface 2 refers to the area of ​​the bottom surface 1 excluding the head portion 101. Fig.10 The non-head portion 202 of the folded surface 2 is a partial area at the front end of the folded surface 2 with a length L3, and refers to: the area of ​​the folded surface 2 excluding the head portion 201 .

[0121] refer to Fig.10The head 101 of the bottom surface 1 is square in shape, and the width of the head 101 of the bottom surface 1 is smaller than the width of the non-head 102 of the bottom surface 1. The head 201 of the folding surface 2 is square in shape, and the width of the head 201 of one folding surface 2 is smaller than the width of the non-head 202 of the folding surface 2, and the width of the head 201 of the other folding surface 2 is smaller than the width of the non-head 202 of the folding surface 2, that is, the overall width of the two heads 201 of the two folding surfaces 2 is smaller than the overall width (the sum of the widths) of the non-heads 202 of the two folding surfaces 2.

[0122] In this embodiment, the shape and size of the head portion 101 of the bottom surface 1 are the same as the overall shape and size of the head portions 201 of the two folded surfaces 2 .

[0123] refer to Fig.10 The area between the two folding surfaces 2 is flat, so that the pre-folded paper pad will not be stuck on the separation rod in the middle of the inner flow channel of the paper pad forming machine when feeding, ensuring smooth paper feeding.

[0124] refer to Fig.10 The pre-folded paper pad of the utility model synchronously reduces the width of the head 101 of the bottom surface 1 of the pre-folded paper pad and the overall width of the heads 201 of the two folding surfaces 2, that is, synchronously reduces the width of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad (the front end when the pre-folded paper pad is loaded with paper), so that when loading paper, the friction between the head of the pre-folded paper pad and the inner wall of the flow channel of the paper pad forming machine is smaller, which reduces the deformation reaction force of the paper material and improves the smoothness of paper loading, so that the forming gear at the flow channel outlet of the paper pad forming machine can almost simultaneously clamp the paper of the "upper and lower layers" of the paper feeding head of the pre-folded paper pad, and at the same time pull the "upper and lower layers" of the paper feeding head of the pre-folded paper pad to realize feeding, so that the upper and lower parts of the inner flow channel of the paper pad forming machine are synchronously fed with paper, ensuring smooth paper feeding, thereby ensuring the smooth forming of the pillow-shaped three-dimensional pad material in the paper pad forming machine.

[0125] Fig.11 The figure schematically shows the assembly state of the pre-folded paper pad and the flow channel according to one embodiment of the utility model.

[0126] Take the pre-folded paper pad in the fifth embodiment as an example for explanation. Fig.11 The width of the outlet of the flow channel 3 of the paper pad forming machine suitable for the pre-folded paper pad is A, the width of the front end of the bottom surface 1 of the pre-folded paper pad is greater than or equal to zero and less than or equal to 1.2A, the overall width of the front ends of the two folding surfaces 2 is greater than or equal to zero and less than or equal to 1.2A, the width of the front end of the bottom surface 1 and the overall width of the front ends of the two folding surfaces 2 are slightly larger than the width A of the outlet of the flow channel 3, which can also ensure smooth paper feeding. The width of the front end of the bottom surface 1 and the overall width of the front ends of the two folding surfaces 2 should not exceed 1.2 times the width A of the outlet of the flow channel 3.

[0127] In this embodiment, reference Fig.11 The flow channel 3 of the paper pad forming machine suitable for pre-folded paper pads converges from bottom to top to the middle on both sides, the convergence angle of one side wall of the flow channel 3 is B1, and the convergence angle of the other side wall of the flow channel 3 is B2, 0 degrees ≤ (the sum of the inclination angles of both sides of the head of the bottom surface 1 of the pre-folded paper pad to the middle of the bottom surface 1) ≤ [B1 + B2 + 30 degrees], 0 degrees ≤ (the sum of the inclination angles of the sides of the heads of the two folding surfaces 2 of the pre-folded paper pad away from the middle of the bottom surface 1 to the middle of the bottom surface 1) ≤ [B1 + B2 + 30 degrees], that is, when the convergence amplitude of the head of the pre-folded paper pad is slightly larger than the convergence amplitude of the two side walls of the flow channel 3, smooth paper feeding can also be ensured, and the pre-folded paper pad The sum of the angles at which the two sides of the head converge toward the middle should preferably not exceed [B1+B2+30 degrees]; taking the pre-folded paper pads in Examples 6 and 8 as an example, the two sides of the head 101 of the bottom surface 1 of the pre-folded paper pad are parallel to the two sides of the non-head 102 of the bottom surface 1, so the sum of the inclination angles of the two sides of the head 101 of the bottom surface 1 of the pre-folded paper pad toward the middle of the bottom surface 1 is 0, and the side of the head 201 of the folding surface 2 of the pre-folded paper pad away from the middle of the bottom surface 1 is parallel to the side of the non-head 202 of the folding surface 2, so the sum of the inclination angles of the side of the head 201 of the folding surface 2 of the pre-folded paper pad away from the middle of the bottom surface 1 toward the middle of the bottom surface 1 is also 0.

[0128] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. Pre-folded paper pad, characterized in that, It includes a bottom surface and two folding surfaces, the two folding surfaces are respectively connected to two sides of the bottom surface, and the two folding surfaces are folded on the bottom surface. The width of the head portion of the bottom surface is smaller than the width of the non-head portion of the bottom surface, and the overall width of the heads of the two folded surfaces is smaller than the overall width of the non-head portions of the two folded surfaces. The front end of the head of the bottom surface is pointed or flat, and / or the front end of the head of the folded surface is pointed or flat.

2. The pre-folded paper pad according to claim 1, characterized in that: The folded surface and the bottom surface are connected at a portion close to the front end of the bottom surface in a separated state.

3. The pre-folded paper pad according to claim 1, characterized in that: The head of the bottom surface is in a folded shape and / or the head of the folded surface is in a folded shape.

4. The pre-folded paper pad according to claim 1, characterized in that: The two sides of the head of the bottom surface are inclined toward the middle of the bottom surface, and the inclination angles are α1 and α2, 0 degrees < α1 < 90 degrees, 0 degrees < α2 < 90 degrees, The side of the head of the folded surface away from the middle of the bottom surface is inclined toward the middle of the bottom surface, and the inclination angles are β1 and β2 respectively, 0 degree < β1 < 90 degrees, 0 degree < β2 < 90 degrees.

5. The pre-folded paper pad according to claim 4, characterized in that: 20 degrees ≤ α1 ≤ 70 degrees, 20 degrees ≤ α2 ≤ 70 degrees, 20 degrees ≤ β1 ≤ 70 degrees, 20 degrees ≤ β2 ≤ 70 degrees, or, 40 degrees ≤ [α1 or α2 + β1 or β2] ≤ 140 degrees.

6. The pre-folded paper pad according to claim 1, characterized in that: When the width of the outlet of the flow channel of the paper pad forming machine suitable for pre-folded paper pads is A, the width of the front end of the bottom surface is greater than or equal to zero and less than or equal to 1.2A, and the overall width of the front ends of the two folding surfaces is greater than or equal to zero and less than or equal to 1.2A.

7. The pre-folded paper pad according to claim 4, characterized in that: When the convergence angle of one side wall of the flow channel of the paper pad forming machine suitable for pre-folded paper pads is B1 and the convergence angle of the other side wall is B2, 0 degrees ≤ [α1 + α2] ≤ [B1 + B2 + 30 degrees], 0 degrees ≤ [β1 + β2] ≤ [B1 + B2 + 30 degrees].

8. The pre-folded paper pad according to claim 3, characterized in that: A section of the connection between the head of the folded surface and the non-head of the folded surface is in a separated state, and the separated area starts from the side of the folded surface away from the middle of the bottom surface.

9. The pre-folded paper pad according to claim 3, characterized in that: The area between the two folded surfaces is flat.

10. The pre-folded paper pad according to claim 1, characterized in that: The shape and size of the head of the bottom surface are the same as the overall shape and size of the heads of the two folded surfaces.

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