CN217752750U

CN217752750U - Double-layer film blowing part processing mechanism of film blowing equipment

Info

Publication number: CN217752750U
Application number: CN202221281938.1U
Authority: CN
Inventors: 陈俊鸿; 梅基业; 林旭
Original assignee: Guangdong Jinming Machinery Co Ltd
Current assignee: Guangdong Jinming Machinery Co Ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-11-08
Anticipated expiration: 2032-05-26

Abstract

A double-layer film blowing part processing mechanism of film blowing equipment comprises a film blowing die head, wherein a herringbone clamping plate is arranged above the film blowing die head, the herringbone clamping plate is formed by combining a left film guide plate and a right film guide plate into a herringbone, each film guide plate is provided with an upper film guide small roller and a lower film guide small roller, a traction clamping roller is arranged above the herringbone clamping plate, and a downstream guide roller is arranged at the downstream of the traction clamping roller; a horizontal guide rail is arranged at a position close to the top of the herringbone clamping plate, the horizontal guide rail is positioned at the outer side of the herringbone clamping plate, and the extending direction of the horizontal guide rail is parallel to the axial direction of the traction clamping roller; the horizontal guide rail is provided with a cutter component in a sliding way, and the cutter component is also provided with a cutter component driving mechanism for driving the cutter component to move along the horizontal guide rail; the cutter assembly comprises a cutter cylinder and a cutter, wherein the cutter cylinder drives the cutter to stretch, and the stretching moving direction of the cutter is perpendicular to the extending direction of the horizontal guide rail. The utility model discloses can puncture the film automatically and make the free air of the film the inside that contains the bloated position in traction pinch roll low reaches to drive away when needs.

Description

Double-layer film blowing part processing mechanism of film blowing equipment

Technical Field

The utility model belongs to the technical field of blown film equipment, concretely relates to blown film equipment double-deck film portion processing mechanism that bloies.

Background

The plastic film can be produced by a blown film process. In the production process of the film, a plastic melt is vertically extruded from a circular extrusion port of a die head 91 to form a film bubble 81, as shown in fig. 1, a vertical air inlet pipe 92 is arranged at the center of the die head, air can be blown into the film bubble 81 from the vertical air inlet pipe 92 at the center of the die head during production, so that the film bubble 81 is blown, then the film bubble runs through a herringbone clamping plate positioned above the die head, the herringbone clamping plate is formed into a herringbone by combining a left film guide plate and a right film guide plate, each film guide plate is provided with an upper film guide roller and a lower film guide roller, the herringbone clamping plate gradually clamps the film bubble 81, finally the film bubble 81 runs through a traction clamping roller 2 and is completely clamped to form a double-layer film 80, then the double-layer film 80 runs to the downstream guide rollers, and finally is wound.

In the above process, although the plastic material travels all the way downstream, the air inside the bubble is theoretically confined and enclosed in the bubble space between the pulling nip 2 and the die and should not be liberated downstream of the pulling nip 2, i.e., into the double-layered film 80 between the pulling nip and the downstream guide roll. However, in the initial phase of the production process described above, the drawing nip rollers need to be opened for a short period of time in order to allow the film to pass through the drawing nip rollers 2 before the drawing nip rollers 2 are closed, this phase being referred to as the blistering phase. In this foaming phase, a part of the air must be released downstream of the pulling nip, in particular into the double film 80 between the pulling nip 2 and the downstream guide roll 3, by the slightly open pulling nip, and when the pulling nip 2 is closed, this part of the air remains (is entrained) in the double film 80 between the pulling nip 2 and the downstream guide roll 3. In addition, during the production process, the drawing nip roller 2 rotating at a high speed draws a small amount of air into the double-layered film downstream of the drawing nip roller, and the air is accumulated. The free air contained in the double-layer film between the traction nip roller and the downstream guide roller forms an air blowing part, so that the double-layer film 80 cannot be tightly attached, and the winding quality of the double-layer film is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and provide a mechanism for processing the downstream air blowing part of the traction nip roller of the film blowing equipment, which can automatically puncture the film when needed so as to remove the free air in the film which is clamped at the downstream air blowing part of the traction nip roller.

The purpose can be realized according to the following scheme: a double-layer film blowing part processing mechanism of film blowing equipment comprises a film blowing die head, wherein a herringbone clamping plate is arranged above the film blowing die head, the herringbone clamping plate is formed by combining a left film guide plate and a right film guide plate into a herringbone, each film guide plate is provided with an upper film guide small roller and a lower film guide small roller, a traction clamping roller is arranged above the herringbone clamping plate, and a downstream guide roller is arranged at the downstream of the traction clamping roller; the double-roller traction roller is mainly characterized in that a horizontal guide rail is arranged at a position close to the top of the herringbone clamping plate, the horizontal guide rail is positioned at the outer side of the herringbone clamping plate, and the extending direction of the horizontal guide rail is parallel to the axial direction of the traction roller; the horizontal guide rail is provided with a cutter assembly in a sliding way, and the cutter assembly is also provided with a cutter assembly driving mechanism for driving the cutter assembly to move along the horizontal guide rail; the cutter assembly comprises a cutter cylinder and a cutter, the cutter cylinder drives the cutter to stretch, and the stretching moving direction of the cutter is vertical to the extending direction of the horizontal guide rail; when the cutter is in an extending state, the blade of the cutter penetrates through the gap between two of the film guide small rollers of one of the film guide plates.

The "outer side" of the herringbone splint means the left side of the film guide plate located on the left side, or the right side of the film guide plate located on the right side.

The utility model has the advantages of it is following and effect:

1. the utility model discloses can accomplish the back and close on the time stage around the roll change in the foaming stage, utilize cutter cylinder drive cutter to stretch out fast and retract immediately, make the cutting edge of cutter cut the puncture film in the twinkling of an eye and form the aperture, later these film positions of taking the aperture continue to operate and reach the above-mentioned and pull between pressing from both sides roller and its low reaches deflector roll, just can make the clamp contain the free air of the film the inside at the drum gas position that pulls in the press from both sides roller low reaches and arrange away, ensure the rolling quality.

2. The film initially forms small holes which are close to the top of the herringbone clamping plate, namely close to the top of the traction clamping roller, and the small holes quickly cross the traction clamping roller along with the operation of the film, so that the small holes cause that the air leakage of the film bubble (positioned at the upstream part of the traction clamping roller) is very slight, the expansion degree of the film bubble is basically not influenced, and the obvious fluctuation of the blowing pressure is not caused.

3. The cutter assembly is movable along a horizontal guide rail so that the lateral position of the puncturing film can be selected according to the lateral position of the air blowing part.

Drawings

FIG. 1 is a schematic diagram of a process of forming a film bubble by a film blowing device and folding the film bubble into a double-layer film.

Fig. 2 is a schematic diagram of the structure and the using state of the embodiment of the present invention.

Fig. 3 is a partially enlarged schematic view of a in fig. 2.

Fig. 4 is a perspective view of the cutter assembly and the electric cylinder of fig. 2.

Fig. 5 is a schematic top view of the structure shown in fig. 4.

Fig. 6 is a schematic diagram of a variation of the structure shown in fig. 3.

Detailed Description

The double-layer film air-blowing part processing mechanism of the film blowing equipment shown in fig. 2, 3, 4 and 5 comprises a film blowing die head 91, wherein a herringbone clamping plate is arranged above the film blowing die head 91, the herringbone clamping plate is formed by combining a left film guiding plate 1 and a right film guiding plate 1 into a herringbone shape, each film guiding plate 1 is provided with an upper film guiding small roller and a lower film guiding small roller 10, a traction clamping roller 2 is arranged above the herringbone clamping plate, a downstream guide roller 3 is arranged at the downstream of the traction clamping roller 2, a horizontal guide rail 4 is arranged at a position close to the top of the herringbone clamping plate, the horizontal guide rail 4 is positioned at the outer side of the herringbone clamping plate, and the extending direction of the horizontal guide rail 4 is parallel to the axial direction of the traction clamping roller 2; a cutter assembly is slidably arranged on the horizontal guide rail 4, and a cutter assembly driving mechanism for driving the cutter assembly to move along the horizontal guide rail is also arranged, wherein the cutter assembly driving mechanism is an electric cylinder 5; the cutter assembly comprises a cutter cylinder 6 and a cutter 7, wherein the cutter cylinder 6 drives the cutter 7 to stretch, and the stretching moving direction of the cutter 7 is vertical to the extending direction of the horizontal guide rail 4; when the cutting knife 7 is in the extending state, the cutting edge of the cutting knife 7 penetrates through the gap between two film guiding small rollers 10 of one film guiding plate 1.

In the use process of the embodiment, after the foaming stage is completed and in the time period before and after the reel change, when the free air in the double-layer film between the traction nip roller 2 and the downstream guide roller 3 is accumulated to form an air blowing part, when the cutter cylinder 6 is used for driving the cutter 7 to rapidly extend, the cutting edge of the cutter 7 instantaneously cuts the puncture bubble 81 to form a small hole, and as shown in fig. 6, the cutter cylinder 6 drives the cutter 7 to retract immediately after the puncture. Thereafter, since the distance between the cutter 7 and the traction nip roll is short, the small hole reaches the traction nip roll 2 quickly, so that the amount of air leakage caused to the bubble 81 is small, and the air leakage of the bubble 81 can be supplemented (the conventional film blowing die 91 is provided with a vertical air inlet pipe); after the small hole passes over the traction nip roller 2, the air-blowing part in the double-layer film between the traction nip roller 2 and the downstream guide roller 3 can be exhausted.

Claims

1. A double-layer film blowing part processing mechanism of film blowing equipment comprises a film blowing die head, wherein a herringbone clamping plate is arranged above the film blowing die head, the herringbone clamping plate is formed by combining a left film guide plate and a right film guide plate into a herringbone shape, each film guide plate is provided with an upper film guide small roller and a lower film guide small roller, a traction clamping roller is arranged above the herringbone clamping plate, and a downstream guide roller is arranged at the downstream of the traction clamping roller; the method is characterized in that: a horizontal guide rail is arranged at a position close to the top of the herringbone clamping plate, the horizontal guide rail is positioned at the outer side of the herringbone clamping plate, and the extending direction of the horizontal guide rail is parallel to the axial direction of the traction clamping roller; the horizontal guide rail is provided with a cutter assembly in a sliding way, and the cutter assembly is also provided with a cutter assembly driving mechanism for driving the cutter assembly to move along the horizontal guide rail; the cutter assembly comprises a cutter cylinder and a cutter, the cutter cylinder drives the cutter to stretch, and the stretching moving direction of the cutter is vertical to the extending direction of the horizontal guide rail; when the cutter is in the extending state, the blade of the cutter penetrates through the gap between two film guide small rollers of one film guide plate.