Forming equipment for manufacturing concave type hollow-like paper tube

Abstract

The invention discloses forming equipment for manufacturing a concave type hollow-like paper tube, and relates to the technical field of paper tube processing. The forming equipment for manufacturing the concave type hollow paper tubes comprises a forming equipment body, the forming equipment body comprises a group of groove roller frames A, five groups of groove roller frames B, two groups of groove roller frames C, two groups of groove roller frames D and a square tube inner mold, and the square tube inner mold is arranged in the groove roller frames A, the groove roller frames B, the groove roller frames C, the groove roller frames D and the square tube inner mold. The number of the groove roller frames D is two groups; the equipment is used for dynamically forming concave type hollow-like paper tubes, so that the equipment can be produced in batches to meet the market requirements; a plurality of types of rolling frames can be designed in advance and are flexibly arranged on the equipment according to the specific conditions of the concave hollow paper tubes; the smooth forming of the concave paper tube is ensured through the multi-section mold design and the dynamic connection mode matched with the equipment; as ancillary facilities of equipment, the groove roller, the bottom support roller, the in-groove pressing strip, the shaping section mold outer surface buckling groove and the like restrain rebound after forming.

Description

Technical Field

[0001] The invention relates to the technical field of paper tube processing, and in particular to a forming device for manufacturing concave hollow paper tubes. Background Art

[0002] As environmental protection requirements on packaging materials become higher and higher, using paper materials to replace foam packaging materials is a revolutionary measure at present, especially for products such as home appliances and computers. Due to their large volume, the replacement work in this field is particularly urgent; the basic shape of the replacement product is a concave hollow paper tube, see the attached Figure 1 ;

[0003] Some companies have previously used round paper tubes as blanks and produced concave hollow paper tubes using static extrusion methods. Figure 3 ; During the forming process of this method, in order to prevent the material in the groove from rebounding, two measures are adopted, namely, inner mold heating and extended extrusion time. The advantage is that the forming size is precise, but the disadvantage is that the forming time is long. It takes about 2 minutes to form a 500mm long finished product. The efficiency is low and cannot meet the market demand. Therefore, a new type of forming equipment for manufacturing concave hollow paper tubes is provided to solve the above problems. Summary of the invention

[0004] The purpose of this invention is to replace foam packaging materials with paper packaging materials, take this as a guide, and improve the disadvantage of long static forming time to develop equipment for dynamically forming concave hollow paper tubes. Its biggest highlight is that it can achieve mass production and meet market requirements. In view of the shortcomings of the prior art, the present invention will provide a concave hollow paper tube high-speed forming equipment, including corresponding mold structure and forming process.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forming device for manufacturing a concave hollow paper tube, comprising a forming device body, the forming device body comprising a groove roller frame A, a groove roller frame B, a groove roller frame C, a groove roller frame D and a square tube inner mold, the number of the groove roller frame A is one group, the number of the groove roller frame B is five groups, the number of the groove roller frame C is two groups, the number of the groove roller frame D is two groups, the groove roller frame A is the input end of the paper tube blank and is arranged on the left side of the forming device body, and the order of distribution from left to right on the forming device body is groove roller frame A, groove roller frame B, groove roller frame B, groove roller frame B, groove roller frame D, groove roller frame C, groove roller frame B, groove roller frame D, groove roller frame C and groove roller frame A, and the square tube inner mold is penetrated between the groove roller frame A, the groove roller frame B, the groove roller frame C and the groove roller frame D;

[0006] Among them, the groove roller frame A includes a frame, a bottom supporting roller, a pressure roller, a cylinder A, a cylinder B and a pressure strip. The bottom supporting roller and the pressure roller are rotatably installed in the frame in a vertically parallel distribution. The paper tube blank can be transported between the bottom supporting roller and the pressure roller. Cylinder A and cylinder B are respectively arranged at the bottom and top of the frame and their free ends are facing the inner side of the frame and are relatively distributed. The free ends of cylinder A and cylinder B are connected with pressure strips.

[0007] Preferably, the groove roller frame A also includes a workbench, a dual-axis reduction motor and a universal joint. The frame and the dual-axis reduction motor are both mounted on the workbench. The dual-axis reduction motor is located on the side of the frame. The two sets of output shafts of the dual-axis reduction motor are both connected to a set of universal joints, and the two sets of universal joints are respectively connected to the bottom support roller and the pressure roller.

[0008] Preferably, the groove roller frame B has the same structure as the workbench, frame, bottom support roller, cylinder A, cylinder B, pressure bar, dual-axis reduction motor and universal joint in the groove roller frame A, and the pressure roller is replaced by the groove roller A.

[0009] Preferably, the groove roller frame C has the same structure as the workbench, frame, bottom support roller, cylinder A, cylinder B, pressure bar, dual-axis reduction motor and universal joint in the groove roller frame A, and the pressure roller is replaced by the groove roller B.

[0010] Preferably, the groove roller frame D and the groove roller frame B in the groove roller frame A have the same workbench, frame, cylinder A, cylinder B, pressure strip, dual-axis reduction motor and universal joint structure as the groove roller frame A, the bottom support roller and the pressure roller are replaced by two sets of side support rollers, and the frame, cylinder A, cylinder B, pressure strip, dual-axis reduction motor and universal joint in the groove roller frame D are all horizontally arranged relative to the groove roller frame A.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This equipment can dynamically form concave hollow paper tubes, so it can be mass-produced to meet market demand.

[0013] 2. A variety of rolling frames can be designed in advance and flexibly arranged on the equipment according to the specific conditions of the concave hollow paper tube.

[0014] 3. The multi-section mold design and dynamic connection method adapted to the equipment ensure the smooth forming of the concave paper tube.

[0015] 4. As auxiliary facilities of the equipment, groove rollers, bottom support rollers, inner groove pressure strips, buckle grooves on the outer surface of the forming section mold, etc., suppress the rebound after forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Attached Figure 1 : Schematic diagram of the finished concave hollow paper tube;

[0018] Attached Figure 2 : Schematic diagram of the forming principle of ordinary square paper tube;

[0019] Attached Figure 3 : Schematic diagram of static forming principle of concave hollow paper tube;

[0020] Attached Figure 4 : Schematic diagram of the dynamic forming principle of concave hollow paper tube;

[0021] Attached Figure 5 : Schematic diagram of upper and lower groove roller frame type A of paper tube high-speed forming machine;

[0022] Attached Figure 6 : Schematic diagram of the upper and lower groove roller frame of the paper tube high-speed forming machine, type B;

[0023] Attached Figure 7 : Schematic diagram of the upper and lower groove roller frame of the paper tube high-speed forming machine, type C;

[0024] Attached Figure 8 : Schematic diagram of left and right groove roller frame D of paper tube high-speed forming machine;

[0025] Attached Fig. 9 : Schematic diagram of concave hollow paper tube high-speed forming machine;

[0026] Attached Fig.10 : Schematic diagram of the groove forming section mold and rolling process;

[0027] Attached Fig.11 : Schematic diagram of the mold and rolling process of the concave paper tube forming section;

[0028] Attached Fig.12 : Schematic diagram of the mold and rolling process of the concave paper tube shaping section;

[0029] Attached Fig.13 : Schematic diagram of the whole process of forming a concave hollow paper tube;

[0030] Attached Fig.14 : Schematic diagram of the arrangement of the rollers in the groove and the bottom supporting rollers - groove forming section;

[0031] Attached Fig.15 : Schematic diagram of the arrangement of the inner pressure strip and the bottom support roller of the groove - concave paper tube forming section;

[0032] Attached Fig.16 : Schematic diagram of the arrangement of the inner pressure strip of the groove and the bottom support roller - concave paper tube shaping section.

[0033] Figure numerals: 1. Forming equipment body; 2. Grooved roller frame A; 21. Workbench; 22. Frame; 23. Bottom support roller; 24. Pressure roller; 25. Cylinder A; 26. Cylinder B; 27. Pressure strip; 28. Double-axis reduction motor; 29. ​​Universal joint; 3. Grooved roller frame B; 31. Grooved roller A; 4. Grooved roller frame C; 41. Grooved roller B; 5. Grooved roller frame D; 51. Side support roller; 6. Square tube inner mold. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] See also Figure 1-16The present invention provides a technical solution: a forming device for manufacturing a concave hollow paper tube, comprising a forming device body 1, the forming device body 1 comprising a groove roller frame A2, a groove roller frame B3, a groove roller frame C4, a groove roller frame D5 and a square tube inner mold 6, the number of the groove roller frame A2 is one group, the number of the groove roller frame B3 is five groups, the number of the groove roller frame C4 is two groups, the number of the groove roller frame D5 is two groups, the groove roller frame A2 is the input end of the paper tube blank and is arranged on the left side of the forming device body 1, and the order of distribution from left to right on the forming device body 1 is the groove roller frame A2, the groove roller frame B3, the groove roller frame B3, the groove roller frame D5, the groove roller frame C4, the groove roller frame B3, the groove roller frame D5, the groove roller frame C4 and the groove roller frame A2, and the square tube inner mold 6 is penetrated by the groove roller frame A2, the groove roller frame B3, the groove roller frame C4 and The groove roller frame A2 includes a frame 22, a bottom supporting roller 23, a pressure roller 24, a cylinder A25, a cylinder B26 and a pressure strip 27. The bottom supporting roller 23 and the pressure roller 24 are rotatably installed in the frame 22 in a vertically parallel distribution. The paper tube blank can be transported between the bottom supporting roller 23 and the pressure roller 24. The cylinder A25 and the cylinder B26 are respectively arranged at the bottom and the top of the frame 22, and the free ends are both facing the inner side of the frame 22 and are relatively distributed. The free ends of cylinder A25 and cylinder B26 are connected with a pressure strip 27. The groove roller frame A2 also includes a workbench 21, a double-axis reduction motor 28 and a universal joint 29. The frame 22 and the double-axis reduction motor 28 are both mounted on the workbench 21. The double-axis reduction motor 28 is located on the side of the frame 22. The two sets of output shafts of the double-axis reduction motor 28 are both connected with a set of universal joints 29. The two sets of universal joints 29 are respectively connected to the bottom support roller 23 and the pressure roller 24.

[0039] Furthermore, the groove roller frame B3 has the same structure as the workbench 21, frame 22, bottom support roller 23, cylinder A25, cylinder B26, pressure bar 27, dual-axis reduction motor 28 and universal joint 29 as the groove roller frame A2, and the pressure roller 24 is replaced by the groove roller A31.

[0040] Furthermore, the groove roller frame C4 has the same structure as the workbench 21, frame 22, bottom support roller 23, cylinder A25, cylinder B26, pressure bar 27, dual-axis reduction motor 28 and universal joint 29 as the groove roller frame A2, and the pressure roller 24 is replaced by the groove roller B41.

[0041] Secondly, the groove roller frame D5 and the groove roller frame B3 in the groove roller frame A2 have the same structure as the workbench 21, frame 22, cylinder A25, cylinder B26, pressure bar 27, dual-axis reduction motor 28 and universal joint 29 in the groove roller frame A2, the bottom support roller 23 and the pressure roller 24 are replaced by two sets of side support rollers 51, and the frame 22, cylinder A25, cylinder B26, pressure bar 27, dual-axis reduction motor 28 and universal joint 29 in the groove roller frame D5 are all horizontally arranged relative to the structure of the groove roller frame A2.

[0042] By attaching Figure 1 The finished concave hollow paper tube also uses a round paper tube as the blank. Compared with the ordinary square paper tube, the concave hollow paper tube is formed, and its blank not only moves axially, but also moves radially into the groove. See the attached Figure 2 and 4 It can be seen that dynamic forming is more difficult than static forming.

[0043] 1. From the perspective of equipment, the concave hollow paper tube forming still uses a high-speed forming machine linked to the round paper tube, but the composition and distribution of each groove roller frame are different. The groove roller frame consists of four types: A, B, C, and D. See the attached Figure 5 , 6 , 7 and 8; the distribution of each groove roller frame on the concave hollow paper tube high-speed forming machine is shown in the attached Fig. 9 .

[0044] 2. From the perspective of the cooperation between the mold structure and the groove roller frame, due to the large number of groove roller frames, the length of the inner mold will inevitably increase, and the difficulty of mold processing will increase. If segmented processing is adopted, how to connect to ensure the dimensional accuracy of the mold after connection is another problem. A slight deviation in the inner dimension of the groove will inevitably cause the paper tube to be squeezed and cracked on one side in the groove. For this reason, this case divides the mold into three sections for design and processing, and then uses a method of active connection. Active connection means that each section has corresponding moving space, but due to the limitation of the wall thickness of the paper tube, the center line of the groove of the groove tool is kept basically consistent during the forming process. See the attached for details. Fig.13 .

[0045] The first section is the concave hollow paper tube groove forming section. From the top of the circular paper tube to the bottom of the groove, the deformation is very large. In this section, in addition to the axial movement of the material, the focus of the material is radial movement, that is, the movement at the groove. This is the key to the formation of the concave hollow paper tube. For this reason, multiple steps are designed. This case has four steps. See the attached for details. Fig.10 ; At the same time, favorable conditions for radial movement of the paper tube should be provided as much as possible, and these conditions will be explained later.

[0046] The second stage is the concave hollow paper tube forming stage. In this stage, on the one hand, the material inside the groove that has been rolled into place should be controlled not to rebound, and then the other planes of the paper tube should be rolled to make the concave paper tube reach the basic shape, see attached Fig.11 ; The measures to assist in forming and prevent rebound in this section will be described later.

[0047] The third stage is the concave hollow paper tube shaping stage; this stage is repeated rolling using the method of the second stage. However, the mold surface of this stage adopts a multi-faceted small groove design, the purpose of which is to press the excess material into the groove to form a reinforcing rib, thereby preventing the part in the groove from rebounding, or rebounding as little as possible; in this case, under normal circumstances, the amount of round tube blank is appropriately increased so that the excess material can be pressed into the groove.

[0048] 3. Measures to prevent rebound

[0049] Different from the anti-rebound measures in static forming, the anti-rebound measures adopted in this case of dynamic forming are achieved by passive suppression and generation of reinforcing ribs.

[0050] ①, Groove forming section. The purpose of this section of rolling is to roll the material in the groove step by step to the depth of the finished product. In order to help the material into the groove, on the one hand, a corresponding bottom roller is arranged at the bottom to prevent the material from falling when moving forward; on the other hand, a passive roller is arranged in the groove to guide the material to flow into the groove, and cooperate with the groove roller to achieve groove forming. For details, see the attached Fig.14 .

[0051] ②, In the concave paper tube forming section, the bottom still uses a bottom support roller. The material in the concave is pressed into place to prevent it from rebounding. The material at the bottom of the concave part is pressed by a pressure strip. Under the push of the upper and lower and left and right groove rollers, the material at the bottom of the groove moves forward under the pressure strip to prevent it from rebounding. See the attached for details. Fig.15 .

[0052] ③. Concave paper tube shaping section. The same bottom support roller and groove pressure strip are used as in the forming section. The biggest difference here is that the pressure surface of the mold is partially grooved. Its role in preventing rebound has been explained before, so it will not be repeated here. For details, see the attached Fig.16 .

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A forming device for manufacturing concave hollow paper tubes, It is characterized in that include: The forming device body (1) comprises a groove roller frame A (2), a groove roller frame B (3), a groove roller frame C (4), a groove roller frame D (5) and a square tube inner mold (6). The number of the groove roller frames A (2) is one group, the number of the groove roller frames B (3) is five groups, the number of the groove roller frames C (4) is two groups, the number of the groove roller frames D (5) is two groups, the groove roller frame A (2) is the input end of the paper tube blank and is arranged on the left side of the forming device body (1). The arrangement order from left to right on the main body (1) is the groove roller frame A (2), the groove roller frame B (3), the groove roller frame B (3), the groove roller frame B (3), the groove roller frame D (5), the groove roller frame C (4), the groove roller frame B (3), the groove roller frame D (5), the groove roller frame C (4) and the groove roller frame A (2), and the square tube inner mold (6) is arranged between the groove roller frame A (2), the groove roller frame B (3), the groove roller frame C (4) and the groove roller frame D (5); The groove roller frame A (2) comprises a frame (22), a bottom supporting roller (23), a pressure roller (24), a cylinder A (25), a cylinder B (26) and a pressure strip (27). The bottom supporting roller (23) and the pressure roller (24) are rotatably installed in the frame (22) in a vertically parallel distributed manner. The paper tube blank can be transported between the bottom supporting roller (23) and the pressure roller (24). The cylinder A (25) and the cylinder B (26) are respectively arranged at the bottom and the top of the frame (22) and the free ends are both facing the inner side of the frame (22) and are relatively distributed. The free ends of the cylinder A (25) and the cylinder B (26) are connected with the pressure strip (27).

2. A forming device for manufacturing a concave hollow paper tube according to claim 1, Features: The groove roller frame A (2) further comprises a workbench (21), a double-shaft reduction motor (28) and a universal joint (29); the frame (22) and the double-shaft reduction motor (28) are both mounted on the workbench (21); the double-shaft reduction motor (28) is located on the side of the frame (22); two sets of output shafts of the double-shaft reduction motor (28) are both connected to a set of universal joints (29); and the two sets of universal joints (29) are respectively connected to the bottom supporting roller (23) and the pressure roller (24).

3. A forming device for manufacturing a concave hollow paper tube according to claim 2, Features: The groove roller frame B (3) has the same structure as the groove roller frame A (2) in terms of the workbench (21), frame (22), bottom supporting roller (23), cylinder A (25), cylinder B (26), pressure bar (27), double-axis reduction motor (28) and universal joint (29), and the pressure roller (24) is replaced by the groove roller A (31).

4. A forming device for manufacturing a concave hollow paper tube according to claim 3, Features: The groove roller frame C (4) has the same structure as the groove roller frame A (2) in terms of the workbench (21), frame (22), bottom supporting roller (23), cylinder A (25), cylinder B (26), pressure bar (27), double-axis reduction motor (28) and universal joint (29), and the pressure roller (24) is replaced by the groove roller B (41).

5. A forming device for manufacturing a concave hollow paper tube according to claim 4, Features: The groove roller frame D (5) and the groove roller frame B (3) in the groove roller frame A (2) are the same in structure as the working table (21), frame (22), cylinder A (25), cylinder B (26), pressure strip (27), double-axis reduction motor (28) and universal joint (29) in the groove roller frame A (2); the bottom supporting roller (23) and the pressure roller (24) are replaced by two groups of side support rollers (51); the frame (22), cylinder A (25), cylinder B (26), pressure strip (27), double-axis reduction motor (28) and universal joint (29) in the groove roller frame D (5) are all arranged horizontally relative to the structure of the groove roller frame A (2).

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