CN117299689A - Polyimide film surface dust removing system - Google Patents

Abstract

The invention discloses a polyimide film surface dust removing system, which comprises a dust removing device arranged on a film running path, wherein the dust removing device comprises a front dust removing mechanism and a rear dust removing mechanism, the front dust removing mechanism comprises a set of dust blowing and collecting components respectively arranged on the front surface and the back surface of the film, and the rear dust removing mechanism comprises a set of dust sticking components respectively arranged on the front surface and the back surface of the film; the dust blowing and sucking assembly comprises an active guide roller and a dust removing bellows which is close to the active guide roller during dust removal, the dust removing bellows comprises a front air inlet chamber, a rear air inlet chamber and a middle air suction chamber, an air suction opening of the air suction chamber is arranged facing the active guide roller, two air blowing openings are symmetrically and obliquely arranged in front of and behind the air suction opening, the air suction opening is provided with a wind shield with the same radian as the active guide roller, and a centrally arranged air shrinkage opening is arranged on the wind shield; when dust is removed, a cavity for blowing and sucking dust is formed between the two blowing openings, the wind shield and the film on the driving guide roller. The invention can rapidly remove dust on the surface of the film by blowing dust and sticking dust on both sides.

Description

Polyimide film surface dust removal system

Technical field

The invention relates to supporting equipment for plastic film production, specifically a polyimide film surface dust removal system.

Background technique

In the domestic production process of biaxially oriented polyimide film produced by thermal method, the process of first longitudinal stretching and then transverse stretching is usually adopted. In order to achieve a temperature resistance of 500°C inside the transverse stretching machine, sliding chain rails are used Usually, copper alloy inlaid with graphite film-reducing strips are used for lubrication. However, during long-term operation, graphite and copper powder are scattered out of the wear-reducing strips. After being drawn horizontally by hot air, the generated dust floats in the oven and adheres to the surface of the film. , affects the surface quality of the film, reduces the surface quality level of the film, and is not conducive to the production of high-end polyimide films.

As the demand for high-end polyimide films increases, the appearance requirements for the films become more stringent. The commonly used film dust removal method in China usually uses a dust roller to contact the impurities on the film surface and transfer them to a transferable dust collection paper roll. In the long-term production process, the consumption of dust collection paper rolls is large, and it must be replaced regularly. Dust-sticking rollers are cumbersome and costly.

Contents of the invention

In order to solve the deficiencies of the existing technology, the present invention proposes a polyimide film surface dust removal system.

The technical solution for the polyimide film surface dust removal system that can solve the shortcomings of the existing technology includes a dust removal device installed on the film running path. The difference is:

1. The dust removal device includes a front dust removal mechanism and a rear dust removal mechanism. The front dust removal mechanism includes a set of dust blowing and suction components installed on the front and back sides of the film. The rear dust removal mechanism is included on the front and back sides of the film. A set of dust-sticking components are provided on each side.

2. The dust blowing and suction assembly includes an active guide roller and a dust removal air box that moves closer to the active guide roller during dust removal. The dust removal air box includes two front and rear air inlet chambers and an air extraction chamber in the middle.

3. The air suction port of the air extraction chamber is opened facing the active guide roller. Two air blowing ports are symmetrically placed in front and rear of the air suction port. The air suction port is provided with a wind shield with the same arc as the active guide roller. The wind shield There is a central air constriction opening on the board.

4. During dust removal, a cavity for blowing and absorbing dust is formed between the two air blowing ports, the windshield and the film on the active guide roller.

Furthermore, each air inlet chamber is connected to the air pump through the air inlet pipe, the air exhaust chamber is connected to the fan through the air return pipe, and the fan is connected to the dust collecting box through the pipeline.

One structure of the dust-adhesive assembly includes an active dust-adhesive roller, a pressure roller that presses the film on the active dust-adhesive roller during dust removal, and a dust removal transfer paper roll that presses the active dust-adhesive roller.

Further, the dust removal transfer paper roll is installed on the inflatable shaft, and the inflatable shaft is installed on the pressing mechanism through a quick-change chuck.

Beneficial effects of the present invention:

The polyimide film surface dust removal system of the present invention can realize double-sided blowing and dust collection of the film, and can quickly remove dust, lint, and small impurities on the front and back surfaces of the film. It is easy to operate, has a high degree of automation, and improves efficiency. The cleanliness and purity of the product surface improves the film quality, reduces the consumption of dust collection paper rolls, and saves production costs.

Description of drawings

Figure 1 is a schematic structural diagram of an embodiment of the present invention.

Figure 2 is a schematic structural diagram of the front dust removal mechanism in the embodiment of Figure 1.

Figure 3(a) is a view in direction A of Figure 2.

Figure 3(b) is a top view of Figure 3(a).

FIG. 4 is a schematic structural diagram of the rear dust removal mechanism in the embodiment of FIG. 1 .

Drawing number identification: 1. Film; 2. Blowing dust collection component; 2-1. Active guide roller; 2-2. Air inlet chamber; 2-3. Exhaust chamber; 2-4. Windshield; 3. Dust-adhesive components; 3-1, active dust-adhesive roller; 3-2, pressure roller; 3-3, dust transfer paper roll; 3-4, air expansion shaft; 3-5, quick-change chuck; 4, air inlet Pipe; 5. Air pump; 6. Air return pipe; 7. Fan; 8. Dust collection box; 9. Tee pipe; 10. Wall panel; 11. Up and down movement mechanism I; 12. Up and down movement mechanism II; 13. Reduction motor unit.

Detailed ways

The technical solution of the present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

The polyimide film surface dust removal system of the present invention includes a dust removal device arranged on the running path of the film 1 (the running direction of the film 1 is from right to left in Figure 1). The dust removal device includes a front dust removal mechanism (right side ) and a rear dust removal mechanism (left side). The front dust removal mechanism includes a set of dust blowing and suction assemblies 2 respectively provided on the front and back sides of the film 1. A set of dust-sticking components 3, as shown in Figure 1.

Taking the dust blowing assembly 2 located on the front of the film 1 as an example to illustrate its structure:

The dust blowing and suction assembly 2 includes an active guide roller 2-1 and a dust removal bellows. The film 1 is wrapped around the upper part of the active guide roller 2-1. The dust removal bellows is located directly above the active guide roller 2-1. The height can be adjusted by moving up and down. The width of the dust removal air box is consistent with the length of the active guide roller 2-1. The dust removal air box includes an exhaust chamber 2-3 in the middle and inlets located in front and behind the exhaust chamber 2-3. Wind chamber 2-2, the air suction port at the lower end of the exhaust chamber 2-3 is provided with a wind shield 2-4, the bottom of the wind shield 2-4 is arched to be consistent with the upper part of the active guide roller 2-1 Curved arc, the windshield 2-4 is provided with an air constriction opening in the center, and the air blowing opening provided at the lower end of the front air inlet chamber 2-2 is placed obliquely forward and downward at the front end of the air suction opening, and the air inlet chamber at the rear is arranged in an arc shape. The blowing port opened at the lower end of the chamber 2-2 is placed obliquely toward the rear end of the air suction port. The front and rear blowing ports are symmetrical to the air suction chamber 2-3; during dust removal, the dust removal bellows moves downward toward the active guide roller 2-3. 1 close together, the two blowing holes and the windshield 2-4 and the film 1 on the active guide roller 2-1 form a cavity for blowing and sucking dust, as shown in Figures 1 and 2.

During dust removal, the central angle B formed by the suction port and the center of the circle of the active guide roller 2-1 is 50° to 60°, and the central angle C formed by the center of the circle between the front and rear air blowing ports and the active guide roller 2-1 is 100°. ~120°, as shown in Figure 2.

Two left and right air return pipes 6 (wear-resistant hoses) are installed on the top of the exhaust chamber 2-3. The two air return pipes 6 are connected to a centrifugal fan 7 through a tee pipe 9. The fan 7 passes through a pipeline. Connect the dust box 8; three air inlet pipes 4 (wear-resistant hoses) on the left, middle and right are installed on the top of each air inlet chamber 2-2, and the three air inlet pipes 4 are connected to the vortex air pump 5 through the air inlet main pipe. As shown in Figure 2, Figure 3(a), and Figure 3(b).

The operation mode of the dust blowing and suction assembly 2 is:

The front and rear air pumps 5 send the pressure air into the front and rear air inlet chambers 2-2 respectively through the front and rear air inlet ducts 4, and the pressure air passes through the blowing ports of the front and rear air inlet chambers 2-2. Blow out evenly, blowing the dust attached to the surface of the film 1 after passing through the dust removal air box and lifting it to the middle. At the same time, the fan 7 is started. The floating dust is sucked in by the return air generated by the exhaust chamber 2-3 and pumped through the return pipe 6 and the fan 7. to the dust collecting box 8, thereby cleaning most of the dust, lint and impurities attached to the surface of the film 1.

Taking the dust-sticking component 3 located on the back side of the film 1 as an example to illustrate its structure: the reduction motor 401 is connected to and driven by the dust-sticking roller 404 through a coupling 402

The dust-sticking component 3 includes an active dust-sticking roller 3-1 (low-viscosity rubber roller), a pressure roller 3-2, a dust transfer paper roll 3-3 and an air-inflating shaft 3-4. The film 1 is wrapped around the active dust-sticking roller 3-1. On the upper part of the dust-sticking roller 3-1, the left and right end rollers of the active dust-sticking roller 3-1 are installed between the left and right wall panels 10 through the left and right seated bearings. The active dust-sticking roller 3-1 The left end roller shaft of 1 is connected to the deceleration motor unit 13 through a coupling. The pressure roller 3-2 is located directly above the active dust-sticking roller 3-1 and is installed on the left and right up and down moving mechanisms I11. The left and right The right up and down moving mechanism I11 is installed on the left and right wall panels 10. The dust removal transfer paper roll 3-3 is set on the inflatable shaft 3-4, and the dust removal transfer paper roll is inflated by the inflatable shaft 3-4. 3-3 is located directly below the active dust-sticking roller 3-1. The left and right end shafts of the air expansion shaft 3-4 are installed on the left side through the left and right quick-change chucks 3-5 (with bearings inside). , the right up and down moving mechanism II 12, the left and right up and down moving mechanisms II 12 are installed on the left and right wall panels 10; during dust removal, the pressure roller 3-2 moves down to compress the film on the active dust sticking roller 3-1 1 upward to make the film 1 closely adhere to the active dust-adhesive roller 3-1, the air expansion shaft 3-4 moves upward to press the dust removal transfer paper roll 3-3 against the bottom of the active dust-adhesive roller 3-1, and the film 1 The dust on the dust removal transfer paper roll 3-3 is transferred to the dust removal transfer paper roll 3-3 through the active dust sticking roller 3-1. After a period of time, when there are more dust and impurities adhered to the dust removal transfer paper roll 3-3, the paper roll can be torn off. , until the entire dust removal transfer paper roll 3-3 is used up, then replace it with a new dust removal transfer paper roll 3-3, so as to remove the remaining dust and lint on the surface of the film 1 that the dust blowing assembly 2 cannot completely remove. and impurities, as shown in Figure 1 and Figure 4.

The up and down moving mechanism I11 includes left and right sliding pairs I. Each sliding pair I includes a slidingly matched linear slide rail I and a sliding plate I. The left and right linear slide rails I are installed on the left and right wall panels 10. The left and right shaft ends of the pressure roller 3-2 are installed on the seated bearings on the left and right sliding plates I, and the left and right wall panels 10 are installed with left and right cylinder seats I through the left and right cylinder seats I. Cylinder I, the downward extending cylinder rods of the left and right cylinder I are connected to the left and right slide plates I, as shown in Figure 4.

The up and down moving mechanism II 12 includes left and right sliding pairs II. Each sliding pair II includes a slidingly matched linear slide rail II and a sliding plate II. The left and right linear slide rails II are installed on the left and right wall panels 10. The left and right quick-change chucks 3-5 are installed on the left and right slide plates II, and the left and right cylinders II are installed on the left and right wall panels 10 through the left and right cylinder seats II. The left and right cylinders The upward extending cylinder rod of II is connected to the left and right slide plates II, as shown in Figure 4.

Claims (4)

1. Polyimide film surface dust removal system, including a dust removal device provided on the running path of the film (1), characterized by: The dust removal device includes a front dust removal mechanism and a rear dust removal mechanism. The front dust removal mechanism includes a set of dust blowing and suction assemblies (2) respectively provided on the front and back sides of the film (1). The rear dust removal mechanism includes A set of dust-adhesive components (3) respectively provided on the front and back sides of the film (1); The dust blowing and suction assembly (2) includes an active guide roller (2-1) and a dust removal air box that moves closer to the active guide roller (2-1) during dust removal. The dust removal air box includes two front and rear air inlet chambers. (2-2) and the middle exhaust chamber (2-3); The air suction port of the air extraction chamber (2-3) is opened facing the active guide roller (2-1). Two air blowing ports are symmetrically inclined in front and rear of the air suction port. The air suction port is provided with the active guide roller (2-1). 1) Windshields (2-4) with the same arc, with a central air constriction opening provided on the windshields (2-4); During dust removal, a cavity for blowing and sucking dust is formed between the two air blowing ports, the windshield (2-4) and the film (1) on the active guide roller (2-1). 2. The polyimide film surface dust removal system according to claim 1, characterized in that: each air inlet chamber (2-2) is connected to the air pump (5) through the air inlet pipe (4), and the exhaust chamber (2-3) The air return pipe (6) is connected to the fan (7), and the fan (7) is connected to the dust box (8) through the pipeline. 3. The polyimide film surface dust removal system according to claim 1 or 2, characterized in that: the dust sticking component includes an active dust sticking roller (3-1), and also includes a method for compressing the film (1) during dust removal. ) on the pressure roller (3-2) on the active dust-adhesive roller (3-1) and the dust removal transfer paper roll (3-3) pressed on the active dust-adhesive roller (3-1). 4. The polyimide film surface dust removal system according to claim 3, characterized in that: the dust removal transfer paper roll (3-3) is installed on an inflatable shaft (3-4), and the inflatable shaft (3-4) is installed on the pressing mechanism through the quick-change chuck (3-5).