CN111203928A

CN111203928A - Cutting device of bag making machine

Info

Publication number: CN111203928A
Application number: CN202010023610.9A
Authority: CN
Inventors: 毛海玉
Original assignee: Taizhou Haida Plastic Package Co ltd
Current assignee: Taizhou Haida Plastic Package Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-05-29

Abstract

The invention relates to the field of plastic bag manufacturing, in particular to a cutting device of a bag making machine, which comprises: the air guide device comprises a support frame, an air guide cover, a cutter and an air pump; the air guide cover is characterized in that conveying rollers are arranged in the length direction of the supporting frame and used for intermittently supplying the processed parts, supporting plates are arranged on two sides of the supporting frame and used for fixing the air guide cover, the air guide cover is erected in the width direction of the processed parts and is a hollow frustum, the number of the air guide covers is two, the air guide covers are arranged in parallel, and an air pump is arranged at the top of each air guide cover. The cutting device of the bag making machine provided by the invention does not cause hard force damage of a cutter and a platform during cutting, and effectively drops off a workpiece.

Description

Cutting device of bag making machine

Technical Field

The invention relates to the field of plastic bag manufacturing, in particular to a cutting device of a bag making machine.

Background

The plastic packaging bags are packaging pieces commonly used in life of people, and the types of the plastic bags are various, wherein one plastic bag is in a shape with two bent side edges and is provided with a plurality of micro-connected parts at the cut;

the existing manufacturing method is intermittent supply along the length direction of the film, when the film is stopped, the cutter moving part drives the cutter to penetrate the film from top to bottom and is abutted with the lower bearing seat to finish cutting, but the following problems also exist:

1. because the plastic film is required to be processed and formed at one time, in order to ensure that each cutting is successful, the force for pressing the cutter is required to be extremely large, so that the weight of the moving part of the cutter is also large, and the volume of the moving part of the cutter is also large due to the reasons that the whole cutter is long, the parallelism between the cutter and the bearing seat is kept and the like, the moving is inconvenient and dangerous due to the increase of the weight and the volume of the moving part, and the cutter or the bearing seat is damaged due to the fact that the cutter is abutted to the bearing seat with high rigidity after being cut off;

2. because the lower pressure of the cutter is larger, the rigidity requirement of the lower bearing seat is very high, otherwise, the loss of the bearing seat and the deformation of an impact point can be caused after several times of impact, the unevenness of a film is caused, the cutting difficulty is increased, and the defective rate is increased.

3. When the cutter is used for passive cutting, the moving part pushes the workpiece to the cutter for passive cutting, and after cutting, the workpiece can not effectively fall off due to reasons of electrostatic adsorption, workpiece burrs and the like, so that the follow-up procedures are influenced.

Disclosure of Invention

The present invention has been made in view of the above problems, and provides a cutting device for a bag making machine, which can effectively remove a workpiece without damaging the cutting tool and the table by hard force during cutting.

The invention provides a cutting device of a bag making machine, comprising: the air guide device comprises a support frame, an air guide cover, a cutter and an air pump;

the device comprises a support frame, wherein a conveying roller is arranged on the support frame and used for intermittently supplying a workpiece, supporting plates are arranged on two sides of the support frame and used for fixing a wind scooper, the wind scooper is erected in the width direction of the workpiece and is a hollow frustum body, the wind scoopers are arranged in parallel, and an air pump is arranged at the top of each wind scooper;

the cutter is arranged in the middle section of the inside of the air guide cover, and the bottom of the cutter is lower than that of the air guide cover.

In one embodiment, the connecting portion is provided with a vertical upward small hole.

In one embodiment, the tip of the cutter is slightly above the top surface of the workpiece.

In one embodiment, the shape of the wind scooper conforms to the shape of the cutter.

In one embodiment, the bottom of the wind scooper is located at the maximum elevation of the work piece.

In one embodiment, a wind deflector inclined towards the knife tip is arranged in the wind scooper.

Has the advantages that:

1. the invention can cut the workpiece without using large force by lifting the workpiece by negative pressure, thereby reducing the damage probability of the cutter, simultaneously needing no moving part with heavy weight and large volume, leading the integral manufacture to be more convenient and reliable, reducing the danger and saving certain manufacture, maintenance and use cost.

2. According to the invention, the cutting point of the workpiece is lifted in a negative pressure adsorption mode, so that the cutting position of the workpiece is slightly tight, the cutter can cut easily, the success rate of cutting is ensured, and the whole device is more stable and reliable.

3. According to the invention, through the conversion of positive and negative pressures of the air pump, the workpiece is effectively separated from the cutter, and the workpiece is prevented from being adsorbed on the cutter.

Drawings

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

FIG. 2 is a detail view of the air guiding cover and the cut interior of the present invention.

Fig. 3 is a detailed view of the present invention in operation.

FIG. 4 is a forming diagram of a machined part of the present invention.

Detailed Description

The present invention is further illustrated in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from the description herein, and it will be readily appreciated by those skilled in the art that the present invention can be embodied in many different forms without departing from the spirit and scope of the invention.

As shown in fig. 1 and 2, the cutting device of a bag machine according to the present invention includes: the device comprises a support frame 1, an air guide cover 2, a cutter 3 and an air pump 4;

the conveying roller 12 is arranged on the support frame 1, the conveying roller 12 is used for intermittently supplying a workpiece, the support plates 11 are arranged on two sides of the support frame 1, the support plates 11 are used for fixing the wind scooper 2, the wind scooper 2 is erected in the width direction of the workpiece, the wind scooper 2 is a hollow frustum, the wind scoopers 2 are arranged in parallel, an air pump 4 is arranged at the top of the wind scooper 2, the air pump 4 is used for quickly pumping air in the wind scooper 2 to form a negative pressure state, and the workpiece below is lifted when the air is pumped out;

as shown in fig. 2, the cutter 3 is arranged in the middle section of the inside of the air guide cover 2, the bottom of the cutter is lower than the bottom of the air guide cover 2, air is pumped out at a high speed by the air pump 4 to form negative pressure, and a workpiece is lifted to abut against the cutting edge of the cutter 3 and penetrate through the cutting edge to form a small notch;

as shown in fig. 3, the adjacent sides between the wind scoops 2 are connection portions 22, and after the workpiece passes through the cutting edge of the cutter 3, the fan of the air pump 4 is reversed to suck external air and blow the air toward the workpiece inserted into the cutting edge, so that the workpiece is returned to the original position.

As shown in fig. 3, preferably, as an implementation mode, the bottom side 21 of the wind scooper 2 is in a shape of a round corner, which aims to make the air flow faster along the arc-shaped wall surface, and the formed lifting force is stronger, so that the cutting is more stable and reliable.

Preferably, as an embodiment, the connecting portion 22 is provided with a through hole in a vertical horizontal plane, which is aimed at sucking more air from the middle portion, making the supporting point of the middle portion uniformly stressed when lifted, and making the cutting more stable.

Preferably, as an implementation mode, the tip of the cutting knife 3 is slightly higher than the top surface of the workpiece, and the purpose is to move closer to the workpiece as far as possible without blocking the workpiece, so that the cutting efficiency is faster, the lifting force requirement is smaller, and certain internal consumption is saved.

Preferably, as an implementation mode, the shape of the wind scooper 2 is consistent with that of the cutter 3, and the wind scooper is better attached to the arc-shaped structure of the cutter 3, so that the lifted point can be better cut.

Preferably, as an implementation mode, the bottom of the wind scooper 2 is located at the maximum lifting height of the workpiece, and the purpose of the wind scooper is to limit the vertical height of the workpiece, so that the workpiece cannot be inertially deformed when lifted.

Preferably, as an implementation mode, the wind guide plate inclined to the knife tip is arranged in the wind guide cover 2, so as to better guide the external air flow and blow off the workpiece on the knife tip after the cutting is completed, and prevent the workpiece from being adhered to the cutting knife 3.

The working principle of the invention is as follows:

the conveying roller 11 conveys the machined part to the lower part of the cutter 3 and then stops, the air pump 4 forms high-speed air exhaust, the air current enables the machined part to be adsorbed and lifted to the cutter point of the cutter 3 along the round angle 21 through the direct distance between the air guide cover 2 and the cutter 3 for cutting, after the cutting is completed, the fan of the air pump 4 rotates reversely, outside air is sucked and blown to the machined part inserted into the cutter point, and the machined part is made to fall back to the original position.

Claims

1. The invention provides a cutting device of a bag making machine, comprising: the device comprises a support frame (1), an air guide cover (2), a cutter (3) and an air pump (4);

the supporting frame (1) is provided with a conveying roller (12), the conveying roller (12) is used for intermittently supplying the workpieces, the two sides of the supporting frame (1) are provided with supporting plates (11),

it is characterized in that; the supporting plate (11) is used for fixing the wind scoopers (2), the wind scoopers (2) are erected in the width direction of a workpiece, the wind scoopers (2) are hollow frustum bodies, the number of the wind scoopers (2) is two, the wind scoopers are arranged in parallel, and the top of each wind scooper (2) is provided with an air pump (4);

the cutter (3) is arranged at the inner middle section of the air guide cover (2), and the bottom of the cutter is lower than that of the air guide cover (2);

the adjacent edges between the wind scoopers (2) are connecting parts (22).

2. The cutting apparatus of a bag machine as set forth in claim 1, wherein: the bottom side edge (21) of the air guide cover (2) is in a round angle shape.

3. The cutting apparatus of a bag machine as set forth in claim 1, wherein: the connecting part (22) is provided with a through hole vertical to the horizontal plane.

4. The cutting apparatus of a bag machine as set forth in claim 1, wherein: the tool point of the cutting knife (3) is slightly higher than the top surface of the workpiece.

5. The cutting apparatus of a bag machine as set forth in claim 1, wherein: the shape of the wind scooper (2) is consistent with that of the cutter (3).

6. The cutting apparatus of a bag machine as set forth in claim 1, wherein: the bottom of the wind scooper (2) is positioned at the maximum lifting height of a workpiece.

7. The cutting apparatus of a bag machine as set forth in claim 1, wherein: the wind guide cover (2) is internally provided with a wind guide plate which inclines to the knife tip.