CN217703705U - Special polygonal punch for plastic geogrid - Google Patents

Abstract

The utility model relates to a geogrid processing equipment technical field, concretely relates to special polygon drift of plastics geogrid, including the drift body, the one end of drift body is the punching press face, and the cross-section of the punching press face of drift is the octagon. The utility model discloses can reduce the mesh because of indulging the stress of transverse stretching to the closed angle, avoid this stress to destroy, better protection node to mesh edge shape.

Description

Special polygonal punch for plastic geogrid

Technical Field

The utility model relates to a geogrid processing equipment technical field, concretely relates to special polygon drift of plastics geogrid.

Background

The production process of the plastic geogrid is characterized in that polyolefin raw materials are plasticized by an extruder to form polyolefin plates, then the polyolefin plates are punched by a punch to form a pore plate, and finally the pore plate is stretched to form the novel geotechnical reinforcement material. In a general production process, the high-strength geogrid is produced by changing the thickness of a plate material and changing the specification of a product.

However, as the market demands for material meshes, especially for large meshes or ultra-large meshes, are higher and higher, the corners of the large meshes are torn due to too sharp points by using conventional quadrangular or rhombic punching needles, and the appearance is unqualified.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a special polygon drift of plastics geogrid can reduce the mesh because of indulging the stress of transverse stretching to the closed angle, avoids this stress to destroy the mesh shape.

The utility model discloses a realize through following technical scheme:

the utility model provides a special polygon drift of plastics geogrid, includes the drift body, and the one end of drift body is the punching press face, and the cross-section of the punching press face of drift is the octagon.

Furthermore, the cross section area of the punching surface of the punch is less than or equal to 0.8cm²。

Preferably, the cross-sectional area of the punching surface of the punch is 0.25 to 0.60cm²。

Further, four inclined sides of the octagonal section are curved sides with the same radian.

Furthermore, the net mesh size of the plastic geogrid is 5cm to 10cm.

The utility model has the advantages that:

the utility model designs that the punching section of the punch is octagonal, so that the plastic geogrid is more tear-resistant after punching and stretching, the stress of the mesh at the sharp corner due to longitudinal and transverse stretching is reduced, and the damage of the stress to the shape of the mesh is avoided; the original quadrangle is changed into the regular octagon, so that the stress at the node is reduced, the mesh shape is protected, and the functions of protecting the node and protecting the ribs are achieved.

Drawings

Fig. 1 is a schematic structural diagram of a geogrid punched by a quadrilateral punching head in the prior art.

Fig. 2 is a schematic view of a structure for stretching the geogrid of fig. 1.

Fig. 3 is a schematic structural view of the geogrid punched by the prior art diamond-shaped punch.

Fig. 4 is a schematic view of the structure of fig. 3 in which the geogrid is stretched.

Fig. 5 is a schematic drawing of a stamping cross section of the octagonal punch according to the present invention.

Fig. 6 is a schematic diagram of the geogrid after being punched using the punch of fig. 5.

Fig. 7 is a schematic view of the structure of fig. 6 in which the geogrid is stretched.

Fig. 8 is a schematic sectional view of a punch according to embodiment 2.

Shown in the figure:

1. the angle I,2, the angle II,3, the angle III,4, the angle IV,5, the quadrangle punched hole, 6, the geogrid, 7, the node, 8, the circular arc, 9, the regular octagonal cross section, 10, the regular octagonal punched hole, 11, the fixed edge, 12, the deformed edge, 13 and the curved edge.

Detailed Description

In order to clearly explain the technical features of the present solution, the present solution is explained by the following detailed description.

Through analyzing fig. 1 and 2, after the geogrid is punched by using a quadrilateral punching head, a quadrilateral punched hole 5 is left on the geogrid, then the punched geogrid 6 is subjected to biaxial stretching, the plastic geogrid 6 needs to overcome the tensile force at the corner in the stretching process, as shown in fig. 1, an angle I1, an angle II2, an angle III3 and an angle IV4 gradually become an arc 8 in the stretching process, and four corners of each quadrilateral punched hole 5 form a node 7 with four arcs.

Similarly, by analyzing fig. 3 and 4, after the geogrid is punched by using the rhombic punch, the rhombic punch holes are left on the geogrid, then the geogrid after punching is subjected to bidirectional stretching, the tensile force of each corner needs to be overcome during the stretching process of the plastic geogrid, the four corners of the rhombus gradually become straight lines, and the four corners of each rhombic punch hole form straight lines connecting four arcs.

In the process of stretching the square punch, the angle is changed into a straight line or an arc line of four corners of the mesh, and the node at the center is stressed outwards in the process, so that the material at the node is weakened, the node is not protected favorably, and when the mesh reaches 5cm or even 10cm, the node is easily torn, so that the appearance and the strength quality of a product are influenced.

Example 1:

as shown in fig. 5, the polygonal punch specially used for the plastic geogrid comprises a punch body, wherein one end of the punch body is a punching surface, and the cross section of the punching surface of the punch is octagonal, preferably regular octagon. In this embodiment, the cross-sectional area of the punching surface of the punch is 0.50cm². When the punch of the utility model is used for punching the geogrid 6, the net hole size of the plastic geogrid is 5cm to 10cm.

As shown in fig. 6, uniform octagonal punched holes 10 are formed in the geogrid 6, and the geogrid 6 after punching is subjected to biaxial stretching to obtain the geogrid shown in fig. 7. After the geogrid 6 in the form is stretched, as shown in fig. 6, one regular octagon punched hole is taken for analysis, eight sides of the regular octagon punched hole 10 are divided into two groups, each group comprises four sides, one group is a fixed side 11, the other group is a deformed side 12, the fixed sides 11 are two transverse sides and two vertical sides, and the deformed sides 12 are four sides arranged obliquely, after the geogrid 6 of the regular octagon punched hole 10 is stretched bidirectionally, the direction of the fixed side 11 is kept unchanged, the inclined deformed sides 12 can be changed into arc lines and straight lines from short lines, and the straight line parts can be overlapped with the two adjacent fixed sides 11, so that the short lines of the fixed sides 11 are changed into long lines, the stress is better than that of the former fixed lines changed from angles, the short lines are changed into arc lines, the stress direction is changed, the nodes are better protected, and the tensile strength is improved.

Example 2:

in this embodiment, the four oblique sides of the octagonal cross section of the punch are curved sides 13 having the same curvature, as shown in fig. 8. The four oblique sides of the octagonal section are designed into curved sides, and the advantages are that: the bevel edge forms a four-angle arc line of a required mesh structure along with longitudinal and transverse stretching, the bevel edge of the punching needle is designed into a curve edge with radian, the curve edge is more consistent with the final mesh shape, the problem of interaction between a node and a molecular chain in a material of a rib in the stretching process is solved, and the formed structure is more stable and reasonable.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims (3)

1. The utility model provides a special polygon drift of plastics geogrid, includes the drift body, and the one end of drift body is the punching press face, its characterized in that: the section of the punching surface of the punch is octagonal, four inclined edges of the octagonal section are curved edges with the same radian, and the sectional area of the punching surface of the punch is less than or equal to 0.8cm²。

2. The special polygonal punch for plastic geogrids according to claim 1, wherein: the cross section area of the punching surface of the punch is 0.25-0.60cm²。

3. The special polygonal punch for plastic geogrids according to claim 1, wherein: the net hole size of the plastic geogrid is 5 cm-10 cm.

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