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A Heavy Duty Fiber Molded Pallet

A molding and fiber technology, which is applied in the field of fiber molding products, can solve the problems of difficult molding of complex thick-walled structures, large deformation, large volume, etc., and achieves easy molding process realization, material saving, and structure simple effect

Inactive Publication Date: 2019-06-04
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of deformation during the fiber molding process, it is difficult to form a complex thick-walled structure with a higher density, resulting in the current fiber molded trays showing the defects of large volume and low load capacity

Method used

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  • A Heavy Duty Fiber Molded Pallet
  • A Heavy Duty Fiber Molded Pallet
  • A Heavy Duty Fiber Molded Pallet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Selection of 4 hole types for panel concave holes

[0048] The lower surface of the panel adopts five types of panel concave hole 4 forms: regular triangle, parallelogram, rectangle, regular hexagon and circle. In order to make the trays with 5 different panel concave hole 4 structures on the lower surface of the panel comparable, all The panel concave holes 4 are arranged in a quantity of 24×20, and the volume of the control panel is the same. The width of the beams between the faces is equal everywhere (except the round holes) to ensure that the panel beams can be evenly stressed.

[0049] The geometric model is established in ProE, and then imported into ANSYS software for static structural simulation analysis. The heavy-duty fiber molding material made from waste cardboard has an elastic modulus of 3 415.3 MPa and a Poisson's ratio of 0.1. The multi-segment linear line segment combination of the multi-segment linear plastic model in ANSYS is used to app...

Embodiment 2

[0054] Example 2: Optimization of the size of the structural unit of the panel concave hole

[0055] For panels with different hole types, the maximum stress point appears at the top of the panel concave hole 4 when the load is uniform. According to the theory of material mechanics, it is mainly due to the bending moment that the maximum stress appears on the top of the panel concave hole 4, which in turn leads to panel damage. For this, take Figure 4Taking the regular hexagonal panel concave hole unit as an example, apply reverse surface pressure to the 6 outer surfaces of the panel concave hole unit, and fix the bottom surface so that each surface forms a linearly distributed bending moment for simulation analysis. The size of the panel concave hole unit mainly includes the face depth, wall thickness, draft angle and rounding radius. According to the pre-experiment, 3 levels are taken for each factor, and the orthogonal test is carried out, as shown in Table 2.

[0056] T...

Embodiment 3

[0060] Embodiment 3: Optimization of the size of the structural unit of the outrigger

[0061] In ANSYS software, the Figure 5 A surface pressure of 0.0001MPa is applied to the upper surface of the outrigger structural unit, and the bottom of the outrigger is fixed for simulation analysis. The dimensions of the outrigger structural unit mainly include thickness, draft angle, and fillet radius. According to the pre-experiment, take 3 levels for each factor and conduct an orthogonal test, see Table 3.

[0062] Table 3 Orthogonal test scheme and result analysis

[0063]

[0064]

[0065] Table 4 shows the analysis of variance of the results of the orthogonal test of the outrigger structural unit.

[0066] Table 4 variance analysis table

[0067]

[0068] From the results of variance analysis in Table 4, it can be seen that the draft angle has a highly significant effect on the maximum stress, while the thickness and round radius have no significant effect. The prim...

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Abstract

The invention discloses a heavy-duty fiber molding pallet and belongs to the technical field of molding for fiber molded products. The heavy-duty fiber molding pallet is technically characterized by comprising a panel; the upper surface of the panel is a plane; the lower surface of the panel is provided with a frame in which a cross beam is arranged; nine supporting legs are also arrayed in the frame; panel concave holes are equidistantly distributed in four regions divided in the lower surface of the panel by the cross beam; and supporting leg concave holes are formed in the inner sides of the supporting legs. Due to the adoption of a structural form of the nine supporting legs, the two-way fork entering operation of the pallet is favorably realized; each of the panel and the supporting legs adopts a structure that the concave holes are downward, so that the cooperative operation of a panel male die and a supporting leg male die and the one-step molding of the whole pallet are favorably realized; and a large flat plate structure on the upper surface of the panel is beneficial to the loading and protection of a borne product.

Description

technical field [0001] The invention relates to a molded tray, in particular to a heavy-duty fiber molded tray, belonging to the technical field of fiber molded product molding. Background technique [0002] Heavy-duty fiber molded pallet is an important structural form of molded pallet. Its advantages are cheap raw materials, wide sources, renewable, simple process, high strength, small size, recyclable and natural degradation of waste, and can be used to replace traditional plastic pallets. Wooden pallets, etc., are used in large and heavy-duty machinery and equipment as well as collective packaging. Due to the large amount of deformation during the fiber molding process, it is difficult to form a complex thick-walled structure with a higher density, resulting in the defects of large volume and low load capacity of the current fiber molded tray. Therefore the present invention proposes a heavy-duty fiber molded pallet based on this phenomenon. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D19/32B65D19/40
CPCB65D19/0014B65D19/40B65D2519/00034B65D2519/00069
Inventor 王全亮肖生苓岳金权
Owner NORTHEAST FORESTRY UNIVERSITY
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