PAN (Polyacrylonitrile) protofilament coil stacking structure
The combination of a perforated tray and a necked plastic plate solves the problem of fuzz caused by friction during the transportation of PAN precursor yarn rolls, ensuring the stability of PAN precursor yarn rolls and the quality of carbon fiber.
Patent Information
- Application Number
- CN202423010692.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-06
AI Technical Summary
After the PAN precursor fibers are prepared, they are prone to fuzzing due to repeated friction with contact materials such as trays and bags, which leads to a decrease in quality.
The stacking structure employs perforated pallets and necked plastic sheets. The combination of perforated pallets and necked plastic sheets ensures that the end face of the PAN filament roll is isolated from the pallet during transportation, thus avoiding friction.
It effectively prevents the formation of fuzz, improves the transport stability of PAN precursor yarn rolls and the final quality of carbon fibers.
Smart Images
Figure CN223534065U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of palletizing and packaging of PAN raw yarn rolls, specifically a PAN raw yarn roll palletizing structure. Background Technology
[0002] PAN precursor fiber is the precursor material for PAN carbon fiber, and its quality directly affects the quality of the carbon fiber bundle. During the preparation of PAN precursor fiber and carbon fiber, a large amount of fuzz is generated due to raw material defects, equipment limitations, operating conditions, and environmental factors, severely impacting the quality of both. The finished PAN precursor fiber has an extremely smooth and silky fiber bundle. Like carbon fiber, it possesses extremely strong tensile stress in the radial direction, but its axial mechanical properties deviate. Therefore, fuzz is easily generated on the surface of the PAN precursor fiber, ultimately directly affecting the quality of the carbon fiber. Fuzz is particularly easily generated during packaging and transportation after PAN precursor fiber preparation, due to repeated friction with various pallets, bags, and other contact materials, further degrading the quality of the PAN precursor fiber. To address this, a PAN precursor fiber roll stacking structure is proposed to reduce the generation of fuzz after PAN precursor fiber preparation. Utility Model Content
[0003] The purpose of this invention is to provide a PAN raw yarn roll stacking structure to solve the problem mentioned in the background art, where PAN raw yarn is prone to fuzzing during packaging and transportation after preparation due to repeated friction with various pallets, bags and other contact materials, resulting in a decline in the quality of PAN raw yarn.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] A PAN precursor yarn roll stacking structure, including
[0006] Through-hole tray; The through-hole tray includes a first panel and a second panel. The two panels have four holes on both sides. The two panels are connected by three square timbers. The three square timbers are evenly placed on both sides of the holes on both sides to form a through-hole tray with holes of the same size and position on the upper and lower panels.
[0007] A plastic sheet with a neck is placed on a perforated tray;
[0008] The perforated tray has holes on both sides that correspond to the neck holes of the necked plastic plate, and the neck holes of the necked plastic plate can extend a certain length along the inner wall of the perforated tray.
[0009] The PAN filament roll is connected to the necked plastic plate and placed on the perforated tray, with the center of the winding shaft inside the PAN filament roll aligned with the center of the hole on the perforated tray;
[0010] The top of the PAN raw yarn roll is placed with a second layer of necked plastic board, and a second layer of through-hole tray is placed on the second layer of necked plastic board. The necked holes of the second layer of necked plastic board and the inner walls of the two holes of the second layer of through-hole tray extend a certain length, which constitutes the stacking structure of the first layer of PAN raw yarn roll.
[0011] The remaining layers of PAN raw yarn roll stacking structure repeat the single-layer structure setting described above in the previous layer structure.
[0012] Furthermore, the size of the through-hole tray is determined according to the outer diameter of the raw yarn roll.
[0013] Furthermore, the through-hole tray used in the 24K standard PAN raw yarn roll is equipped with four double-sided holes, and the holes on the upper and lower sides of the through-hole tray are completely identical.
[0014] Furthermore, the four round plastic necks with neck holes on the second layer of necked plastic plate are fitted to the four two-sided holes on the corresponding panel of the second layer through-hole tray, and the round plastic necks are locked together and positioned along the through-hole tray panel.
[0015] The necked plastic sheet and the through-hole tray are the same size; the hole positioning on the necked plastic sheet is the same as the hole positioning on the through-hole tray panel; the necked plastic sheet has a single-sided plastic round neck with a neck hole, specifically, the edge of the neck hole extends vertically for a certain distance, and the extension direction of the plastic round neck is perpendicular to the direction of the necked plastic sheet.
[0016] Furthermore, the plastic neck with four neck holes on the necked plastic sheet has an elongation of ≥10mm. The thickness of the necked plastic sheet is ≥60 mils. The inside of the PAN raw yarn roll is a UPVC raw yarn winding cylinder, and the outside is a PAN raw yarn bundle wound by a winding machine.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] The through-hole tray of this utility model can be determined according to the outer diameter of the original yarn winding shaft to ensure its transportation stability;
[0019] The through-hole tray and the necked plastic plate of this utility model are the same size and shape. The necked hole extends a certain length along the inner wall of the hole on the through-hole tray. The necked plastic plate has been tested and the extension length must be ≥10mm to ensure its stability and protection of the end face of the PAN raw yarn roll. The thickness of the necked plastic plate is ≥60 mil to ensure the strength and hardness of the necked plastic plate.
[0020] The PAN filament roll structure of this invention prevents the end face of the PAN filament roll from rubbing back and forth with the pallet during transportation after stacking, avoiding the increase of fuzz and affecting the quality of the PAN filament roll and carbon fiber, thus increasing the stability of the PAN filament roll during transportation after stacking. Attached Figure Description
[0021] Figure 1 This is an exploded view of the PAN precursor yarn roll stacking of this utility model.
[0022] Figure 2 This is an exploded view of the raw silk roll of this utility model.
[0023] Figure 3 This is a schematic diagram of the through-hole tray of this utility model.
[0024] Figure 4 This is a schematic diagram of the necked plastic plate of this utility model.
[0025] In the diagram: 1. Through-hole tray; 101. First panel; 102. Square timber; 103. Second panel; 2. Necked plastic sheet; 3. PAN raw yarn roll; 4. Raw yarn winding spool; 5. Second layer necked plastic sheet; 6. Second layer through-hole tray; 7. Third layer necked plastic sheet; 8. Second layer PAN raw yarn roll; 9. Fourth layer necked plastic sheet; 10. Third layer through-hole tray. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings.
[0027] This utility model relates to a PAN raw yarn roll stacking structure, comprising:
[0028] Through-hole tray 1;
[0029] The through-hole tray 1 includes a first panel 101 and a second panel 103. The two panels have four two-way holes. The two panels are connected by three square timbers 102. The three square timbers 102 are evenly arranged on both sides of the two-way holes to form a through-hole tray with the same size and position of holes in the upper and lower panels.
[0030] A plastic sheet with a neck is placed on the perforated tray 1;
[0031] The two holes of the through-hole tray 1 correspond to the neck holes of the necked plastic plate 2, and the neck holes of the necked plastic plate 2 can extend a certain length along the inner wall of the two holes.
[0032] The PAN filament roll 3 is connected to the necked plastic plate 2 and placed on the through-hole tray 1, with the center of the winding shaft inside the PAN filament roll aligned with the center of the hole on the through-hole tray.
[0033] The top of the PAN raw yarn roll 3 is placed with the second layer of necked plastic plate 5, and the second layer of through-hole tray 6 is placed on the second layer of necked plastic plate 5. The necked holes of the second layer of necked plastic plate 5 and the inner walls of the two holes of the second layer of through-hole tray 6 extend a certain length, which constitutes the first layer of PAN raw yarn roll stacking structure.
[0034] The remaining layers of PAN raw yarn roll stacking structure repeat the single-layer structure setting described above in the previous layer structure.
[0035] The size of the through-hole tray 1 is determined according to the outer diameter of the original yarn roll.
[0036] The 24K standard PAN raw yarn roll 3 uses a through-hole tray with 4 double-sided holes, and the holes on the upper and lower sides of the through-hole tray are completely identical.
[0037] The four round plastic necks with neck holes on the second layer of the plastic plate 5 are fitted to the four two-sided holes on the corresponding panel of the second layer of the through-hole tray 6. The round plastic necks are locked together and positioned inward along the through-hole tray panel.
[0038] The necked plastic sheet and the through-hole tray are the same size; the hole positioning on the necked plastic sheet is the same as the hole positioning on the through-hole tray panel; the necked plastic sheet has a single-sided plastic round neck with a neck hole, specifically, the edge of the neck hole extends vertically for a certain distance, and the extension direction of the plastic round neck is perpendicular to the direction of the necked plastic sheet.
[0039] The plastic neck with four holes has an extension of ≥10mm. The thickness of the plastic neck 2 is ≥60 microns (100 microns = 1mm). An extension of ≥10mm means the edge height of the extended boss is >10mm; a height <10mm will cause edge deformation, resulting in a loose fit with the panel. A thickness less than 60 microns is too thin and will deform and tear during use due to pressure, friction, etc.
[0040] The inside of the PAN raw yarn roll 3 is a UPVC raw yarn winding cylinder 4, and the outside is a PAN raw yarn bundle wound by a winding machine.
[0041] In use, this invention first places a perforated pallet in a suitable position, then places a layer of necked plastic sheet on top of the pallet. Using a forklift or PAN raw yarn loading / unloading fixture, the PAN raw yarn rolls are placed on the perforated pallet, aligning the center of the winding shaft inside the PAN raw yarn roll with the center of the hole on the perforated pallet. After filling the perforated pallet with PAN raw yarn rolls, a layer of necked plastic sheet is placed on the top surface of the PAN raw yarn rolls. A second layer of perforated pallet is then placed on top of the plastic sheet. Using the same method, another layer of PAN raw yarn rolls, plastic sheet, and perforated pallet is placed on top of the second layer of perforated pallet. This enables large-scale stacking and transportation of PAN raw yarn rolls. Because of the necked plastic sheet between the PAN raw yarn rolls and the pallet, the quality of the raw yarn bundles at the end face of the PAN raw yarn rolls is also guaranteed.
[0042] Specifically, when the present invention is provided with a four-layer through-hole tray, the placement process is as follows.
[0043] PAN filament rolls 3 are placed vertically on necked plastic plates 2. Using a forklift or PAN filament loading / unloading equipment, one spool of PAN filament roll 3 is placed in each hole of the necked plastic plate until it is full. After the PAN filament rolls 3 are full, a second layer of necked plastic plates 5 is placed on top of the PAN filament rolls 3. The second necked plastic plate 5 is placed opposite the first necked plastic plate 2 on the perforated tray 1, and the holes of the second necked plastic plate 5 fit over the filament winding spool 4 of the PAN filament roll 1. A second layer of perforated tray 6 is placed on top of the second necked plastic plate 5, thus completing the stacking of the first layer of PAN filament rolls. The first and second layers of PAN filament rolls are stacked in the same manner. Before stacking the second layer of PAN filament rolls 8, a third necked plastic plate 7 is placed on the second layer of perforated tray 6. The placement method of the third necked plastic plate 7 is the same as that of the necked plastic plate 2 placed on the bottom perforated tray 1 of the first layer. Next, place the second layer of PAN raw yarn roll 8 onto the third necked plastic plate 7 using a forklift or PAN raw yarn loading and unloading fixture. After the third necked plastic plate 7 is filled with PAN raw yarn roll 1, place the fourth necked plastic plate 9 on the upper surface of the second layer of PAN raw yarn roll 8. After the fourth necked plastic plate 9 is placed, place the third layer of perforated pallet 10 on the fourth necked plastic plate 9. This completes the stacking process. Finally, tighten the strapping by securing the upper and lower pallets and raw yarn rolls together.
[0044] The aforementioned stacking structure prevents the PAN filament rolls from rubbing back and forth between the end face and the pallet during transport after stacking, thus avoiding the increase of fuzz and affecting the quality of the PAN filament rolls and carbon fibers. This method also increases the stability of the PAN filament rolls during transport after stacking.
Claims
1. A PAN precursor yarn roll stacking structure, characterized in that, include Through-hole tray (1); The through-hole tray (1) includes a first panel (101) and a second panel (103). The two panels have four two-way holes. The two panels are connected by three square timbers (102). The three square timbers (102) are evenly arranged on both sides of the two-way holes to form a through-hole tray with the same size and position of holes in the upper and lower panels. A plastic sheet with a neck (2) is placed on a perforated tray (1); The two holes of the through-hole tray (1) correspond to the neck holes of the necked plastic plate (2), and the neck holes of the necked plastic plate (2) can extend a certain length along the inner wall of the two holes. The PAN filament roll (3) is connected to the necked plastic plate (2) and placed on the through-hole tray (1), and the center of the winding shaft inside the PAN filament roll is aligned with the center of the hole on the through-hole tray; The top of the PAN raw yarn roll (3) is placed with a second layer of necked plastic plate (5), and a second layer of through-hole tray (6) is placed on the second layer of necked plastic plate (5). The necked holes of the second layer of necked plastic plate (5) and the inner walls of the two holes of the second layer of through-hole tray (6) extend a certain length, which constitutes the first layer of PAN raw yarn roll stacking structure. The remaining layers of PAN raw yarn roll stacking structure repeat the single-layer structure setting described above in the previous layer structure.
2. The PAN precursor yarn roll stacking structure according to claim 1, characterized in that, The size of the through-hole tray (1) is determined according to the outer diameter of the original yarn roll.
3. The PAN precursor yarn roll stacking structure according to claim 2, characterized in that, The 24K standard PAN raw yarn roll (3) is equipped with four two-sided holes on the through-hole tray, and the holes on the upper and lower sides of the through-hole tray are completely identical.
4. The PAN precursor yarn roll stacking structure according to claim 1, characterized in that, The four round plastic necks with neck holes of the second layer plastic plate (5) fit into the four two-sided holes of the corresponding panel of the second layer through-hole tray (6), and the plastic round necks are locked together and positioned along the through-hole tray panel.
5. The PAN raw yarn roll stacking structure according to claim 1 or 4, characterized in that, The necked plastic sheet and the through-hole tray are the same size; the hole positioning on the necked plastic sheet is the same as the hole positioning on the through-hole tray panel; the necked plastic sheet has a single-sided plastic round neck with a neck hole, specifically, the edge of the neck hole extends vertically for a certain distance, and the extension direction of the plastic round neck is perpendicular to the direction of the necked plastic sheet.
6. The PAN precursor yarn roll stacking structure according to claim 5, characterized in that, The plastic sheet has four round necks with neck holes, and the elongation is ≥10mm.
7. The PAN precursor yarn roll stacking structure according to claim 5, characterized in that, (2) Thickness of the plastic sheet with neck is ≥60 mil.
8. The PAN precursor yarn roll stacking structure according to claim 1, characterized in that, The inside of the PAN raw yarn roll (3) is a UPVC raw yarn winding cylinder (4), and the outside is a PAN raw yarn bundle wound by a winding machine.
9. The PAN precursor yarn roll stacking structure according to claim 1, characterized in that, The stacking structure of the remaining PAN filament rolls is as follows: the stacking structure of the second layer of PAN filament rolls is the same as that of the first layer of PAN filament rolls. In the stacking structure of the second layer of PAN filament rolls, a third piece of plastic plate with neck (7) is set on the second layer through-hole tray (6); the second layer of PAN filament rolls (8) are set on the third piece of plastic plate with neck (7). After the second layer of PAN filament rolls (8) are set on the third piece of plastic plate with neck (7), a fourth piece of plastic plate with neck (9) is set on the second layer of PAN filament rolls (8); a third layer through-hole tray (10) is set on the fourth piece of plastic plate with neck (9).