Preparation device of plastic angle bead

Abstract

The utility model discloses a preparation device of a plastic angle bead. A rack is sequentially provided with a discharging roller, a limiting plate, a pre-tightening group roller, a pre-bending cavity, a bending cavity, a primary bending die, a secondary bending die, an indentation roller and a cutter. A corner bead sequentially passes through a limiting plate, a pre-tightening group roller, a pre-bending cavity, a bending cavity, a primary bending die, a secondary bending die, an indentation roller and a cutter from a discharging roller, and finally a plastic corner bead is formed. The plastic corner protector has the advantages that the arc-shaped inlet is formed in the inlet end of the pre-folding cavity, so that stress concentration caused by severe deformation is overcome, and the strength of the bent part of the plastic corner protector is ensured; due to the adoption of the limiting plate, the offset of the strip-shaped plastic on the limiting plate can be adjusted at any time, the whole production line is ensured to be on the same straight line, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a device for preparing steel coil corner protectors. Background Art

[0002] In steel coil transportation technology, plastic corner protectors are one of the materials that must be used because, on the one hand, they can fix the packaging material on the surface of the steel coil, and on the other hand, they can prevent external forces from damaging the steel coil. There are many types of existing plastic corner protector preparation equipment, which generally use strips of plastic to form plastic corner protectors through multiple extrusions. However, these devices often overlook the fact that during the production process, due to certain deviations in the thickness of the strips of plastic, the strips of plastic cannot always move in a straight line during the extrusion process, resulting in uneven wall thickness of the final plastic corner protector, and large deviations in shape and size. In addition, because the pressure at the bend caused by the deformation of the plastic during the extrusion process is not taken into account, the strength of the final plastic corner protector is relatively low. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a device for preparing a plastic corner protector, comprising a frame, on which a feeding roller, a limit plate, a pre-tightening roller group, a pre-bending cavity, a bending cavity, a primary bending die, a secondary bending die, an indentation roller, and a cutter are sequentially arranged; the corner protector strip passes through the limit plate, the pre-tightening roller group, the pre-bending cavity, the bending cavity, the primary bending die, the secondary bending die, the indentation roller, and the cutter in sequence from the feeding roller to finally form the plastic corner protector;

[0004] The limiting plate includes limiting vertical plates on both sides, threaded holes are set at the bottom of the limiting vertical plates, and the adjusting bolts are screwed on the limiting vertical plates on both sides, and the threaded directions of the threaded holes of the limiting vertical plates on both sides are opposite;

[0005] The pre-tightening roller group includes at least three parallel rollers, and the corner protection strips are wound around the upper and lower ends of adjacent rollers;

[0006] The pre-folding cavity comprises a pre-folding cavity body, an arc-shaped inlet is provided at the inlet end of the pre-folding cavity, and a pre-folding cavity heating layer is provided on the outer side of the pre-folding cavity;

[0007] The bending cavity comprises a bending cavity body, an inlet end of the bending cavity body is provided with a zigzag inlet, and a bending cavity heating layer is provided on the outside of the bending cavity;

[0008] The primary bending die and the secondary bending die both include a broken line inlet and an outlet, and the opening angle of the inlet is greater than the opening angle of the outlet;

[0009] The creasing roller comprises an upper roller and a lower roller, and the surfaces of the upper roller and the lower roller are provided with corresponding concave-convex structures.

[0010] The lower end of the position-limiting vertical plate is embedded in the slideway on the rack.

[0011] Support rollers are also arranged between the limit vertical plates, and both ends of the support rollers are fixed on the frame through bearings.

[0012] The lower ends of the pre-tightening rollers are respectively fixed on slides, and adjusting bolts are arranged between the slides.

[0013] A traction roller is arranged between the creasing roller and the cutting knife.

[0014] The advantages of the utility model are: since an arc-shaped entrance is set at the entrance end of the pre-folded cavity, the stress concentration caused by severe deformation is overcome, and the strength of the bending part of the plastic corner protector is guaranteed; since a limit plate is adopted, the offset of the strip plastic on the limit plate can be adjusted at any time, ensuring that the entire production line is on the same straight line, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2-1 is a top view of the limiting plate;

[0017] Figure 2-2 for Figure 2-1 AA position cross-sectional view;

[0018] Figure 3 Schematic diagram of the entrance end of the pre-folded cavity;

[0019] Figure 4 Schematic diagram of the inlet end of the bending cavity;

[0020] Figure 5 Schematic diagram of the indentation roller structure. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings. As shown in the drawings, the present invention includes a frame 10, on which a feeding roller 1, a limiting plate 2, a pre-tightening roller group 3, a pre-bending cavity 4, a bending cavity 5, a primary bending die 6, a secondary bending die 7, an indentation roller 8, and a cutter 9 are sequentially arranged; the corner guard 20 passes through the limiting plate, the pre-tightening roller group, the pre-bending cavity, the bending cavity, the primary bending die, the secondary bending die, the indentation roller, and the cutter in sequence from the feeding roller to finally form a plastic corner guard;

[0022] The limiting plate 2 includes two limiting vertical plates 21 on both sides, each of which has a threaded hole at its bottom. Adjustment bolts 23 are screwed onto the limiting vertical plates on both sides, and the threaded holes of the limiting vertical plates on both sides have opposite thread directions. In this way, the spacing between the limiting vertical plates can be adjusted by rotating the adjustment bolts. Alternatively, the threaded holes of the two limiting vertical plates have the same thread direction, so that the offset distance of the limiting vertical plates can be adjusted.

[0023] The pre-tightening roller group 3 includes at least three parallel rollers, and the corner protection strips are wound around the upper and lower ends of adjacent rollers;

[0024] The pre-folding cavity 4 includes a pre-folding cavity 41, an arc-shaped inlet 43 is provided at the inlet end of the pre-folding cavity, and a pre-folding cavity heating layer 42 is provided outside the pre-folding cavity;

[0025] The bending cavity 5 includes a bending cavity 51, a zigzag inlet 53 is provided at the inlet end of the bending cavity, and a bending cavity heating layer 52 is provided on the outside of the bending cavity;

[0026] The primary bending die and the secondary bending die both include a broken line inlet and an outlet, and the opening angle of the inlet is greater than the opening angle of the outlet;

[0027] The creasing roller includes an upper roller 81 and a lower roller 82. The surfaces of the upper roller and the lower roller are provided with corresponding concave and convex structures. Through the relative rotation of the upper roller and the lower roller, various holes and pre-openings are formed on the surface of the plastic corner protector.

[0028] In order to ensure that the limiting vertical plate does not deviate during movement, the lower end of the limiting vertical plate is embedded in a slideway on the rack, and the slideway is perpendicular to the corner guard bar.

[0029] Support rollers 22 are further provided between the position-limiting vertical plates, and both ends of the support rollers are fixed on the frame through bearings; the lower ends of the corner guard strips 20 are overlapped on the support rollers 22 .

[0030] In order to facilitate the adjustment of the pre-tightening degree, the lower ends of the pre-tightening rollers are respectively fixed on slides, and an adjusting bolt 31 is provided between the slides.

[0031] A traction roller 11 is provided between the creasing roller and the cutter.

[0032] In the present invention, the cutter is a universal structure, such as a stamping cutter.

Claims

1. A device for preparing a plastic corner protector, comprising a frame, characterized in that: The unloading roller, limiting plate, pre-tightening roller group, pre-bending cavity, bending cavity, primary bending die, secondary bending die, creasing roller, and cutter are arranged on the frame in sequence; the corner guard passes through the limiting plate, pre-tightening roller group, pre-bending cavity, bending cavity, primary bending die, secondary bending die, creasing roller, and cutter from the unloading roller in sequence to finally form a plastic corner guard; The limiting plate includes limiting vertical plates on both sides, threaded holes are set at the bottom of the limiting vertical plates, and the adjusting bolts are screwed on the limiting vertical plates on both sides, and the threaded directions of the threaded holes of the limiting vertical plates on both sides are opposite; The pre-tightening roller group includes at least three parallel rollers, and the corner protection strips are wound around the upper and lower ends of adjacent rollers; The pre-folding cavity comprises a pre-folding cavity body, an arc-shaped inlet is provided at the inlet end of the pre-folding cavity, and a pre-folding cavity heating layer is provided on the outer side of the pre-folding cavity; The bending cavity comprises a bending cavity body, an inlet end of the bending cavity body is provided with a zigzag inlet, and a bending cavity heating layer is provided on the outside of the bending cavity; The primary bending die and the secondary bending die both include a broken line inlet and an outlet, and the opening angle of the inlet is greater than the opening angle of the outlet; The creasing roller comprises an upper roller and a lower roller, and the surfaces of the upper roller and the lower roller are provided with corresponding concave-convex structures.

2. The device for preparing a plastic corner protector according to claim 1, characterized in that: The lower end of the position-limiting vertical plate is embedded in the slideway on the rack.

3. The device for preparing a plastic corner protector according to claim 1, characterized in that: Support rollers are also arranged between the limit vertical plates, and both ends of the support rollers are fixed on the frame through bearings.

4. The device for preparing a plastic corner protector according to claim 1, characterized in that: The lower ends of the pre-tightening rollers are respectively fixed on slides, and adjusting bolts are arranged between the slides.

5. The device for preparing a plastic corner protector according to claim 1, characterized in that: A traction roller is arranged between the creasing roller and the cutting knife.

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