Thin paper roll forming mandrel

Abstract

The utility model discloses a thin paper roll forming mandrel, which is a segmented structure, including a mandrel front section and a mandrel rear section, the mandrel front section includes a first paper roll forming section and a second paper roll forming section, and both are frustum structures with one end large and the other end small, the first paper roll forming section is located at the front end of the second paper roll forming section; the interior of the second paper roll forming section is a hollow structure, and the surface of the second paper roll forming section is provided with air holes connected to the hollow structure; the mandrel front section and the mandrel rear section are connected together by a positioning connection structure; the mandrel rear section is used to connect an external driving mechanism, the interior of the mandrel rear section is also a hollow structure, and is connected to the hollow structure of the second paper roll forming section. The utility model adopts a segmented structure, which is easy to process and reduces the processing cost. By setting the hollow structure and the air holes, the thin paper sheet is adsorbed on the surface of the second paper roll forming section, which effectively prevents the paper sheet from moving and reduces the defective product rate.

Description

Technical Field

[0001] The utility model relates to the field of roll paper packaging equipment, in particular to a thin roll paper forming core shaft. Background Art

[0002] like Figure 1 As shown, some objects in the shape of a truncated cone need to be wrapped with a layer of thin paper on their outer surface, and the thin paper sheet is rolled into a roll shape by a thin paper roll forming mandrel. In the existing thin paper roll forming mandrel, since the paper sheet is very thin and the final formed shape is a truncated cone structure with one end large and the other end small, the position of the paper sheet on the mandrel is easy to move during actual processing, resulting in a high rate of defective products; in addition, the mandrel is directly connected to the reducer, and the length of the mandrel is long, which makes the mandrel processing inconvenient and the processing cost high. Utility Model Content

[0003] In view of the above problems, the utility model provides a thin paper roll forming core shaft which has the advantages of stable paper sheet fixation, low defective product rate, convenient processing and low processing cost.

[0004] A thin paper roll forming mandrel, characterized in that it is a segmented structure, including a mandrel front section and a mandrel rear section, the mandrel front section includes a first paper roll forming section and a second paper roll forming section, the first paper roll forming section and the second paper roll forming section are both frustum structures with one end being large and the other end being small, the first paper roll forming section is located at the front end of the second paper roll forming section; the interior of the second paper roll forming section is a hollow structure, and the surface of the second paper roll forming section is provided with air holes connected to the hollow structure;

[0005] The front section of the mandrel and the rear section of the mandrel are connected together through a positioning connection structure;

[0006] The rear section of the core shaft is used to connect to an external driving mechanism. The interior of the rear section of the core shaft is also a hollow structure and is communicated with the hollow structure of the second paper roll forming section.

[0007] Preferably, the surface of the rear section of the mandrel is provided with a keyway for connecting to an external driving mechanism.

[0008] Preferably, the length of the first paper roll forming section is 2-5 cm, and the length of the second paper roll forming section is 8-15 cm.

[0009] Preferably, a paper sheet receiving groove is provided on the front end surface of the first paper roll forming section.

[0010] Preferably, the air holes are arranged at equal intervals along the length direction of the second paper winding section.

[0011] Preferably, the positioning structure includes a first connecting seat arranged at the tail end of the second paper roll forming section, and a second connecting seat arranged at the rear section of the core shaft, the end face of the first connecting seat is provided with a second connecting seat accommodating hole, and the second connecting seat is embedded in the second connecting seat accommodating hole; corresponding bolt connecting holes are provided on the first connecting seat and the second connecting seat, and the first connecting seat and the second connecting seat are connected by bolts; a positioning pin and positioning hole structure are provided between the first connecting seat and the second connecting seat.

[0012] Furthermore, a sealing ring is provided between the first connecting seat and the second connecting seat.

[0013] Furthermore, the bottom surface and the side surface of the second connecting seat are in contact with the hole wall of the second connecting seat accommodating hole.

[0014] Beneficial effects of the utility model:

[0015] 1. The thin paper roll forming mandrel of the utility model adopts a segmented structure, which is easy to process and reduces the processing cost.

[0016] 2. By setting up the hollow structure and pores, the thin paper sheets are adsorbed on the surface of the second paper roll forming section, which effectively prevents the paper sheets from moving and reduces the defective product rate.

[0017] 3. The front section and the rear section of the mandrel are positioned by positioning pins and contact surfaces, with high positioning accuracy.

[0018] 4. The rear section of the mandrel is connected to the external reducer through a keyway, which directly drives the rotation and improves efficiency.

[0019] 5. The first paper roll forming section can also be used to roll paper. One end of the paper sheet is placed into the paper sheet receiving slot, and the thin paper roll forming core shaft is driven by a motor to rotate to complete a paper roll of another size specification.

[0020] 6. The production of different product specifications can be achieved by replacing the front section of the mandrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The shape of the thin roll paper after molding.

[0022] Figure 2 Schematic diagram of a tissue paper forming mandrel.

[0023] Figure 3 It is a cross-sectional schematic diagram of the front section of the mandrel.

[0024] Figure 4 It is a schematic diagram of the left side of the front section of the mandrel.

[0025] Figure 5 It is a cross-sectional schematic diagram of the rear section of the mandrel.

[0026] Figure 6It is a schematic diagram of the left side of the front section of the mandrel.

[0027] Mandrel front section——100 First roll paper forming section——110 Paper sheet receiving slot——111

[0028] Second paper roll forming section——120 Hollow structure of the second paper roll forming section——121

[0029] Air hole——122 First connection seat——130 Positioning hole——131

[0030] First connection seat bolt connection hole——132 Mandrel rear section——200

[0031] Hollow structure of the second paper roll forming section——210 Keyway——220

[0032] Second connection base - 230 Second connection base bolt connection hole - 231 Positioning pin - 232

[0033] Sealing ring——233 DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the implementation methods of the present application, not all of the implementation methods; and the structures shown in the accompanying drawings are only schematic and do not represent physical objects. It should be noted that based on these embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0035] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical or equivalent elements in the process, method, article or device including the elements.

[0036] The terms "upper", "lower", "inner", "outer", etc. do not constitute absolute spatial relationship limitations, but are only concepts of relative positions, which can be understood by those skilled in the art.

[0037] See also Figure 1-6 A thin paper roll forming mandrel adopts a segmented structure, including a mandrel front section 100 and a mandrel rear section 200 made of metal. The segmented structure is convenient for mandrel processing and reduces processing costs.

[0038] The front section 100 of the mandrel includes a first paper roll forming section 110 and a second paper roll forming section 120. The length of the first paper roll forming section is 2-5 cm, and the length of the second paper roll forming section is 8-15 cm. The first paper roll forming section 110 and the second paper roll forming section 120 are both frustum structures with one end being large and the other end being small. The tail end of the first paper roll forming section 110 is welded to the front end of the second paper roll forming section 120. The interior of the second paper roll forming section is a hollow structure 121, and the surface of the second paper roll forming section is provided with air holes 122 connected to the hollow structure 121. The air holes 122 can be provided in multiple groups. The air holes 122 are evenly distributed along the circumferential direction of the surface of the second paper roll forming section, and the air holes 122 are arranged at equal intervals along the length direction of the second paper roll forming section. By setting the hollow structure and air holes, when the paper roll is formed, the thin paper sheet is first adsorbed on the surface of the second paper roll forming section, and then the thin paper roll forming core shaft is driven by the motor to rotate, so that the thin paper sheet can be rolled, which effectively prevents the paper sheet from moving and reduces the defective product rate.

[0039] The front end surface of the first paper roll forming section 110 is provided with a paper sheet receiving groove 111. The first paper roll forming section can also be used to roll paper. One end of a paper sheet is placed into the paper sheet receiving groove, and the thin paper roll forming core shaft is driven by a motor to rotate, so that a paper sheet of another size can be rolled. The first paper roll forming section 110 and the second paper roll forming section 120 can roll paper sheets of different sizes.

[0040] The rear section 200 of the mandrel is used to connect to an external driving mechanism. The interior of the rear section of the mandrel is also a hollow structure 210, and is connected to the hollow structure 121 of the second paper roll forming section. The hollow structure 210 of the rear section of the mandrel is connected to an external hollowing device so that the air holes 122 of the second paper roll forming section 120 can absorb the thin paper sheet. The surface of the rear section of the mandrel is provided with a keyway 220 for connecting to an external driving mechanism.

[0041] The front section 100 of the mandrel and the rear section 200 of the mandrel are connected together through a positioning connection structure; the positioning structure includes a first connection seat 130 arranged at the tail end of the second paper roll forming section, and a second connection seat 230 arranged at the rear section of the mandrel, the end surface of the first connection seat 130 is provided with a second connection seat accommodating hole 133, and the second connection seat 230 is embedded in the second connection seat accommodating hole 133; and the bottom surface and side surface of the second connection seat are in contact with the hole wall of the second connection seat accommodating hole. The first connection seat 130 is provided with a positioning hole 131, and a positioning pin 232 is provided between the second connection seat 230. The front section of the mandrel and the rear section of the mandrel are positioned by the positioning pin and the contact surface through the positioning hole 131 and the positioning pin 232, and the positioning accuracy is high. The first connection seat 130 is provided with a bolt connection hole 132, and the second connection seat 230 is provided with a corresponding bolt connection hole 231. The first connection seat 130 and the second connection seat 132 are connected by bolts.

[0042] In addition, a sealing ring 233 is provided between the first connecting seat and the second connecting seat to prevent gas leakage.

[0043] Driven by an external driving mechanism such as a speed reducer, the thin paper roll forming mandrel rotates at a uniform speed to roll the paper sheet attached to the surface of the thin paper roll forming mandrel into a circle.

[0044] The production of products with different specifications can be achieved by replacing the front section 100 of the mandrel.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A tissue paper forming mandrel, characterized in that: It is a segmented structure, including a front section of the core shaft and a rear section of the core shaft, the front section of the core shaft includes a first paper roll forming section and a second paper roll forming section, the first paper roll forming section and the second paper roll forming section are both conical structures with one end large and the other end small, the first paper roll forming section is located at the front end of the second paper roll forming section; the interior of the second paper roll forming section is a hollow structure, and the surface of the second paper roll forming section is provided with air holes connected to the hollow structure; the front section of the core shaft and the rear section of the core shaft are connected together by a positioning connection structure; the rear section of the core shaft is used to connect an external driving mechanism, the interior of the rear section of the core shaft is also a hollow structure, and is connected to the hollow structure of the second paper roll forming section.

2. The tissue paper forming mandrel according to claim 1, characterized in that: The surface of the rear section of the core shaft is provided with a keyway for connecting to an external driving mechanism.

3. The tissue paper forming mandrel according to claim 1, characterized in that: The length of the first paper roll forming section is 2-5 cm, and the length of the second paper roll forming section is 8-15 cm.

4. The tissue paper forming mandrel according to claim 1, characterized in that: The front end surface of the first paper roll forming section is provided with a paper sheet accommodating groove.

5. The tissue paper forming mandrel according to claim 1, characterized in that: The air holes are arranged at equal intervals along the length direction of the second paper roll forming section.

6. The tissue paper forming mandrel according to claim 1, characterized in that: The positioning structure includes a first connecting seat arranged at the tail end of the second paper roll forming section, and a second connecting seat arranged at the rear section of the core shaft. The end face of the first connecting seat is provided with a second connecting seat accommodating hole, and the second connecting seat is embedded in the second connecting seat accommodating hole; corresponding bolt connecting holes are provided on the first connecting seat and the second connecting seat, and the first connecting seat and the second connecting seat are connected by bolts; a positioning pin and positioning hole structure are provided between the first connecting seat and the second connecting seat.

7. The tissue paper forming mandrel according to claim 6, characterized in that: A sealing ring is arranged between the first connecting seat and the second connecting seat.

8. The tissue paper forming mandrel according to claim 6, characterized in that: The bottom surface and the side surface of the second connecting seat are in contact with the hole wall of the second connecting seat accommodating hole.

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