CN213767446U - Polyethylene even rolls up easy tear wire cut electrical discharge machining of bag - Google Patents

Abstract

The utility model discloses a polyethylene rolling bag easy-tearing wire cutting machine, which comprises a base and a portal frame, a feeding support and a discharging support are respectively arranged on the bases on the left side and the right side of the portal frame, a vertical direction guide cylinder is fixedly arranged on a portal frame beam, an upper tool apron is fixedly connected below a piston connecting plate of the guide cylinder, an upper sawtooth cutter is arranged in the center of the upper cutter holder, a lower cutter holder is arranged on the base right below the upper cutter holder, a lower sawtooth cutter is arranged at the center of the lower cutter holder, a left pressing plate and a right pressing plate are respectively arranged at the left side and the right side of the upper cutter holder, the left pressing plate and the right pressing plate are respectively connected with the upper cutter holder through springs, the lower surfaces of the left pressure plate and the right pressure plate are lower than the sawtooth tips of the upper cutter and higher than the upper surfaces of the feeding support and the discharging support in a non-cutting free state, and the tooth tips and the tooth valleys of the sawtooth edges of the upper cutter and the lower cutter are mutually occluded after the upper cutter and the lower cutter are close to each other. The utility model discloses the easy tear line steady quality of cutting out is reliable.

Description

Polyethylene even rolls up easy tear wire cut electrical discharge machining of bag

Technical Field

The utility model particularly relates to a polyethylene even rolls up bag and easily tears wire cut electrical discharge machining belongs to polyethylene film bag production technical field.

Background

The medical low-density polyethylene film bag has excellent low-temperature resistance, good chemical stability, electrical insulation and other properties, and is widely applied to the transportation, temporary storage and packaging of raw material powder, food powder and chemical powder. In the prior art, a direct cutting mode is usually adopted after a double-layer cylindrical low-density polyethylene film is heat-sealed for making a bag, each bag is completely cut and then stacked for later use, and the mode is convenient for taking and using the bags, but has larger occupied area and is not beneficial to transfer; the other mode is that the easy tear line of preparation after the heat-seal, then the rolling forms even roll bag, but because the polyethylene film is very soft, the easy tear line is difficult for the preparation, draws to drag too big tension and leads to the heat-seal mouth to warp or even the fracture influences product quality, and the easy tear line that tension undersize formed is unsatisfactory follow-up tears not to open.

Disclosure of Invention

Problem to prior art exists, the utility model provides a polyethylene even rolls up bag and easily tears wire cut electrical discharge machining, the unsatisfactory problem of easy tear line result of use of its aim at solution prior art preparation.

The utility model discloses a following technical scheme realizes: a polyethylene rolling bag easy-to-tear wire cutting machine comprises a base, wherein a portal frame is arranged on the base, a feeding support and a discharging support are respectively arranged on the bases on the left side and the right side of the portal frame, a vertical direction guide cylinder is fixedly arranged on a cross beam of the portal frame, an upper cutter holder is fixedly connected below a piston connecting plate of the guide cylinder, an upper cutter is installed at the center of the upper cutter holder, the edge of the upper cutter is a sawtooth edge, a lower cutter holder is arranged on the base right below the upper cutter holder, a lower cutter is installed at the center of the lower cutter holder, the edge of the lower cutter is a sawtooth edge, a left pressing plate and a right pressing plate are respectively arranged on the left side and the right side of the upper cutter holder, the left pressing plate and the right pressing plate are respectively connected with the upper cutter holder through springs, the lower surfaces of the left pressing plate and the right pressing plate are lower than the sawtooth point of the upper cutter and higher than the upper surfaces of the feeding support and the discharging support in a non-cutting free state, the tooth tips and the tooth valleys of the sawtooth knife edges of the upper cutter and the lower cutter are mutually occluded after the upper cutter and the lower cutter are close to each other.

Furthermore, two ends of the lower surface of the upper tool apron are respectively provided with an upper limiting block, and two ends of the upper surface of the lower tool apron are respectively provided with a lower limiting block; the upper limiting block and the tooth valley of the serrated knife edge of the upper cutter are at the same height, and the lower limiting block and the tooth tip of the serrated knife edge of the lower cutter are at the same height.

The utility model has the advantages that: by adopting a portal frame structure, a vertical direction guide cylinder is fixedly arranged on a portal frame beam, the vertical up-and-down motion of a piston of the guide cylinder is utilized to drive the upper cutter to vertically move up and down, the edges of the upper cutter and the lower cutter are set into sawtooth edges, and the sawtooth edges of the upper cutter and the lower cutter are mutually occluded after being close to each other, so that an easily-torn line is cut on a polyethylene film. Before the upper cutter contacts the polyethylene film to be cut, the left pressing plate and the right pressing plate on the two sides of the upper cutter holder compress the film under the action of the tension of the compressed spring, so that the tension of the film is effectively maintained, the tidiness and deformation of the easy-to-tear line after cutting are guaranteed, the film is stable and reliable, and the quality requirement of subsequent tearing is met.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

The labels in the figure are: the automatic feeding device comprises a base, a portal frame, a guide cylinder, a feeding support, a discharging support, a saw-tooth cutter, a lower cutter seat, a saw-tooth cutter, a limiting block, a left pressing plate 62, a right pressing plate 63, a spring 64 and a lower limiting block 81, wherein the base is 1, the portal frame is 2, the guide cylinder is 3, the feeding support is 4, the discharging support is 5, the upper cutter seat is 6, the saw-tooth cutter is 7, the lower cutter seat is 8, the saw-tooth cutter is 9, the limiting block is 61.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-2, a polyethylene roll bag easy-to-tear line cutting machine comprises a base 1, a portal frame 2 is arranged on the base, a feeding support 4 and a discharging support 5 are arranged on the left side and the right side of the portal frame on the base 1, the feeding support 4 and the discharging support 5 are respectively arranged on two sides of the portal frame 2, a low-density polyethylene film to be cut is fed under the support of the feeding support 4, and the polyethylene film is discharged from the discharging support 5 after the easy-to-tear line is cut; an unwinding device is further arranged on the left side of the feeding support, and a winding device is further arranged on the right side of the discharging support, and the unwinding device and the winding device are arranged conventionally and are not shown in the figure.

The vertical direction guide cylinder 3 is fixedly arranged on a cross beam of the portal frame 2, an upper cutter holder 6 is fixedly connected below a piston connecting plate of the guide cylinder 3, an upper serrated cutter 7 is fixedly connected to the upper cutter holder 6 through a plurality of bolts, upper limiting blocks 61 are respectively arranged at two ends of the lower surface of the upper cutter holder 6, and the upper limiting blocks 61 and the valleys of the serrated edge of the upper serrated cutter 7 are at the same height. The left and right sides of the upper tool apron 6 are respectively provided with a left pressing plate 62 and a right pressing plate 63, the left pressing plate and the right pressing plate are respectively connected with the upper tool apron through springs 64, the lower surfaces of the left pressing plate 62 and the right pressing plate 63 are positioned on the same plane in a free state, the lower surfaces of the left pressing plate 62 and the right pressing plate 63 are lower than the edge of a sawtooth knife edge of the upper cutter 7 and higher than the upper surfaces of the feeding support 4 and the discharging support 5.

The upper cutter base 6 is provided with a lower cutter base 8 on the base 1 under the upper cutter base, the lower cutter base 8 is provided with a lower sawtooth cutter 9 through a plurality of bolts in a fixed connection mode, the two ends of the upper surface of the lower cutter base 8 are respectively provided with a lower limiting block 81, the lower limiting blocks 81 are located at the same height with the sawtooth cutter edge of the lower cutter, the upper cutter 7 and the lower cutter 9 are separated by a certain distance in the vertical direction when the cutting device does not work, and the upper cutter and the lower cutter are mutually meshed with the tooth tops and tooth valleys of the sawtooth cutter edges after being close to each other.

The guide cylinder for the cold cutting device ensures that the upper cutter does not deviate in vertical movement up and down, ensures that the upper cutter keeps normal tool setting with the sawtooth of the lower cutter when the upper cutter works repeatedly and circularly, prevents dislocation and ensures stable product quality. When the easily torn line needs to be cut, the guide cylinder is inflated, the cylinder piston pushes the upper cutter holder to drive the upper cutter and the left and right pressing plates to vertically move downwards, the upper cutter and the left and right pressing plates are close to the direction of the lower cutter, because the lower surfaces of the left pressing plate 62 and the right pressing plate 63 are coplanar and are lower than the edge of a sawtooth knife edge of the upper cutter 7, the left and right pressing plates are in contact with the feeding support 4 and the discharging support 5 below the upper cutter in advance, the film to be cut is pressed tightly along with the further descending of the upper cutter holder, the tension of the film is maintained, then the upper cutter continues to descend and is meshed with the sawtooth of the lower cutter, the easily torn dividing line is formed on the film, the descending distance of the upper cutter can be controlled to control the dividing and connecting proportion of the easily torn line, the cylinder is deflated after the cutting is completed, and then is inflated to drive the upper cutter and the left and right pressing plates to ascend to the initial position to prepare for the next cutting. In the cutting process of the downward movement of the upper tool apron, the upper limiting block and the lower limiting block are arranged, so that the sawtooth collision phenomenon of the upper cutter and the lower cutter can be effectively prevented, the impact wear is reduced, and the service life of the cutter is prolonged.

The above examples are only intended to represent preferred embodiments of the present invention, which are described in more detail and in greater detail, but are not to be construed as limiting the scope of the present patent. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the invention, and these are all within the scope of the invention.

Claims (2)

1. The utility model provides a polyethylene even rolls up easy wire cut electrical discharge machining that tears of bag, includes the base, is provided with the portal frame on the base, is provided with feeding support and ejection of compact support, its characterized in that on the base of the left and right sides of portal frame respectively: the vertical direction guide cylinder is fixedly arranged on a portal frame beam, an upper cutter holder is fixedly connected to the lower portion of a piston connecting plate of the guide cylinder, an upper cutter is installed at the center of the upper cutter holder, the edge of the upper cutter is a sawtooth edge, a lower cutter holder is arranged on a base right below the upper cutter holder, a lower cutter is installed at the center of the lower cutter holder, the edge of the lower cutter is a sawtooth edge, a left pressing plate and a right pressing plate are respectively arranged on the left side and the right side of the upper cutter holder, the left pressing plate and the right pressing plate are respectively connected with the upper cutter holder through springs, the lower surfaces of the left pressing plate and the right pressing plate are lower than the sawtooth point of the upper cutter in a non-cutting free state and higher than the upper surfaces of the feeding support and the discharging support, and the upper cutter and the lower cutter are mutually occluded with a tooth valley after being close to the sawtooth point of the sawtooth edge.

2. The easy-to-tear line cutting machine for polyethylene rolled bags according to claim 1, wherein: the two ends of the lower surface of the upper tool apron are respectively provided with an upper limiting block, and the two ends of the upper surface of the lower tool apron are respectively provided with a lower limiting block; the upper limiting block and the tooth valley of the serrated knife edge of the upper cutter are at the same height, and the lower limiting block and the tooth tip of the serrated knife edge of the lower cutter are at the same height.

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