CN203236508U - Plastic film cutting-off device - Google Patents

Abstract

The utility model discloses a plastic film cutting device, which comprises upper and lower cutters, upper and lower cutter holders, a cutter driving mechanism, and a knife holder moving mechanism. The knife frame is set on the side of the lower beam of the frame, and the upper and lower cutters are arranged on the upper and lower knife frames facing each other, and are fastened and connected by bolts. And the cylinder, the beam on the frame can be displaced up and down on the combined cylinder; the cutter drive mechanism includes a cutter motor and a transmission assembly; the cutter rest movement mechanism is that the moving motor is a servo motor or a stepper motor. Compared with the traditional technology, this utility model adopts the method of moving the knife position to cut the slitting point up and down with the upper and lower knives. The secondary positioning accuracy is high, and the slitting speed can run at high speed, which can be 100 times per minute; the overall trimming length of bag making Relying on the overall forward and backward movement of the cutter, the mechanical inertia is small; the traction tension of the bag making is stable at one time, without sudden changes; the cutter is easy to align, and the qualified rate of finished products is as high as 98%.

Description

A plastic film cutting device

technical field

The utility model relates to the field of plastic film making, in particular to a plastic film cutting device. the

Background technique

The plastic film cutting device is one of the necessary equipment in the plastic film processing. The traditional plastic film cutting device usually adopts the principle of pneumatics. The cutter performs reciprocating cutting up and down, and finally realizes the cutting operation. However, there are many shortcomings in the traditional method. For example, the power source used is a cylinder, which is prone to generate large noise pollution and affect the health of workers. In addition, using the cylinder as the power source will result in slow shearing action, because the movement of the cylinder itself is not sensitive, resulting in slow shearing action of the upper and lower cutters, and the shearing speed of the traditional shearing method only reaches 70 times/min. the

In addition, the cylinder is used as the power source, and the dual-cylinder drive mode is adopted. There is a synchronization difference between the two cylinders, and the reciprocating movement will also cause mechanical wear, thereby reducing the use efficiency. the

Utility model content

Aiming at the disadvantages of the above-mentioned traditional technology, the utility model aims to propose a plastic film cutting device that is not a cylinder power source. the

The technical solution adopted by the utility model to solve the technical problems is: a plastic film cutting device, comprising upper and lower cutters and upper and lower cutter holders, a cutter driving mechanism, a knife holder moving mechanism, and the upper cutter holder It is installed on the side of the upper beam of the frame, and the lower cutter frame is set on the side of the lower beam of the frame. The axis connects two sets of piston-type cylinder columns and cylinder barrels, and the upper beam of the frame and the lower beam of the frame can move up and down on the combined cylinder body;

The cutter drive mechanism includes a cutter motor and a transmission assembly, wherein the cutter motor is a servo motor, and the transmission assembly consists of two linkage rods, two sets of eccentric wheels, a synchronous belt and a synchronous pulley, and a drive shaft; two linkage rods One end of the drive shaft is connected to the top of the two cylinder columns, and the other end is connected to the two sets of eccentric wheels. The two ends of the drive shaft are connected to the center of the connecting hole of the two sets of eccentric wheels. A synchronous pulley is set radially in the middle;

The tool post moving mechanism is a motor drive mode, and a power drive device is connected to the end of the displacement drive shaft, and the device includes a displacement motor, a reduction box, a bevel gear, a linkage shaft, a driving gear and a driven gear. the

The moving motor of the knife rest moving mechanism is a servo motor or a stepping motor. the

The linkage shaft in the knife rest moving mechanism and the driving shaft in the cutter driving mechanism are arranged parallel to each other in different planes. the

Compared with the traditional technology, the utility model adopts a non-cylinder power source plastic film cutting method, which has low noise and no electromagnetic valve reversing sound; the action response time is short, the driving speed is sensitive, and it can be driven and stopped instantly; the overall cutting High speed, up to 160 times/min; long service life. the

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the utility model knife rest moving mechanism;

Figure 3 is a schematic diagram of the structure of the traditional cylinder power source;

In the figure: 1-upper cutter; 2-lower cutter; 3-linkage rod; 4-bevel gear 1; 5-bevel gear 2; 6-displacement adjustment hand wheel; 7-eccentric wheel; 8-synchronous belt ;9-synchronous pulley; 10-cutter motor; 11-linkage lever; 12-signal plate; 13-induction switch; 14-drive shaft; 15-screw; 16-screw slider; ;18-lower knife rest; 19-ball joint; 20-cylinder column; 21-frame upper beam; 22-cylinder barrel; 23-frame lower beam; 24-guide rail; Tool holder slide block; 27-plastic film; 28-cylinder. the

Detailed ways

The utility model will be described in detail below with reference to the preferred embodiments of the utility model and the accompanying drawings. the

When adopting non-cylinder power source, cutter motor 10 drives upper cutter 1 to move to carry out plastic bag slitting, then upper cutter 1 returns to the highest position and returns to the open state to complete a cycle action. the

The cutter motor 10 drives the synchronous pulley 9, and connects the drive shaft 17 and the eccentric wheel 7 via the synchronous belt 8. Driven by the power of the cutter motor 10, the drive shaft 14 simultaneously drives the eccentric wheels 7 on both sides to rotate, and the eccentric wheel 7 drives Linkage bar 11 stops at highest position after cutting off every time, is to be realized by triggering signal plate of induction switch. the

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model cannot be limited with it. The present utility model also has other structural changes, as long as it is an equal change made according to the protection scope of the present utility model and modification, all should belong to the scope that the utility model covers. the

Claims (3)

1. A plastic film cutting device, comprising upper and lower cutters and upper and lower cutter holders, a cutter drive mechanism, and a knife holder moving mechanism, characterized in that: The upper cutter frame is arranged on the side of the upper beam of the frame, the lower cutter frame is arranged on the side of the lower beam of the frame, the upper and lower cutters are arranged on the upper and lower cutter frames oppositely, and are connected by bolts. Two sets of piston-type cylinder columns and cylinder barrels are respectively coaxially connected with the lower beam of the frame, and the upper beam of the frame can move up and down on the combined cylinder body; The cutter drive mechanism includes a cutter motor and a transmission assembly, wherein the cutter motor is a servo motor, and the transmission assembly consists of two linkage rods, two sets of eccentric wheels, a synchronous belt and a synchronous pulley, and a drive shaft; two linkage rods One end of the drive shaft is connected to the top of the two cylinder columns, and the other end is connected to the two sets of eccentric wheels. The two ends of the drive shaft are connected to the center of the connecting hole of the two sets of eccentric wheels. A synchronous pulley is set radially in the middle; The tool post moving mechanism is a motor drive mode, and a power drive device is connected to the end of the displacement drive shaft, and the device includes a displacement motor, a reduction box, a bevel gear, a linkage shaft, a driving gear and a driven gear. the 2. The plastic film cutting device according to claim 1, characterized in that the moving motor of the knife rest moving mechanism is a servo motor or a stepping motor. the 3. The plastic film cutting device according to claim 1, characterized in that the linkage shaft in the knife rest moving mechanism and the driving shaft in the cutter driving mechanism are arranged parallel to each other on different planes. the

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