CN115246237A - Automatic roll changing and rolling device for adhesive film and continuous non-stop production method for prepreg - Google Patents

Abstract

The invention relates to the technical field of composite material preparation equipment, in particular to an automatic roll changing and rolling device for an adhesive film and a continuous non-stop production method for prepreg. The automatic roll changing device can realize the automatic roll changing work of the sandwich structure adhesive film, realize the continuous non-stop production method of the prepreg, improve the production efficiency of equipment and reduce the workload of personnel.

Description

Automatic roll changing and rolling device for adhesive film and continuous non-stop production method for prepreg

Technical Field

The invention relates to the technical field of composite material preparation equipment, in particular to an automatic roll changing and splicing device for an adhesive film and a continuous non-stop production method for prepreg.

Background

In the preparation process of the composite material (prepreg), an adhesive film is required to be used for compounding the carbon fibers. Therefore, the adhesive film is an important raw material for producing the prepreg, the adhesive film is of a sandwich structure, resin is sandwiched between the bottom release paper and the upper plastic film, and the plastic film needs to be stripped in the using process.

The glued membrane that current compounding machine (preimpregnation material production facility) adopted unreels for the unipolar, and the biggest supply meter number of singly rolling up glued membrane is 3000 meters, and the singly roll length of carbon fiber is 20000 meters, and the production work of 3000 meters glued membranes of 7 batches can be matchd to a roll of carbon fiber. The existing production process is that after the adhesive film of the current material roll is used up, the machine needs to be stopped and manually changed to change the adhesive film and stick and splice the adhesive film roll. The production progress of the equipment is seriously influenced by the work, the continuous production work of the prepreg cannot be realized, and in the roll changing process, the prepreg which is not presoaked in the equipment is scrapped due to the suspension of the equipment.

The automatic adhesive film roll receiving equipment in the existing equipment is used for receiving and rolling single-layer paper and then single-layer plastic films. The plastic film used in the production of the composite material needs to be stripped from the surface of the plastic film in the using process, so that the existing automatic paper or plastic film rolling device cannot be used.

Disclosure of Invention

The invention provides an automatic roll changing and splicing device for an adhesive film and a continuous non-stop production method for prepreg, aiming at the problems in the prior art, and the device is an automatic roll changing and splicing device for unwinding the adhesive film for prepreg production and can realize the automatic roll changing work of the adhesive film with a sandwich structure. The device can realize the continuous non-stop production method of the prepreg, improve the production efficiency of equipment and reduce the workload of personnel.

The basic scheme of the invention is as follows: automatic roll change of glued membrane connects a roll device, including that unwinding mechanism is rolled up to first glued membrane, second glued membrane book unwinding mechanism, first plastic film book winding mechanism, second plastic film book winding mechanism, pressing mechanism and heating mechanism, both sides all are equipped with interval distribution's pressing mechanism about the heating mechanism, every the pressing mechanism outside all is equipped with first glued membrane book unwinding mechanism, every the equal spaced unwinding mechanism that is equipped with of unwinding mechanism front end is rolled up to first glued membrane, every unwinding mechanism rear end is rolled up to first glued membrane all is equipped with first plastic film and rolls up winding mechanism, every the second glued membrane rolls up unwinding mechanism rear end and all is equipped with second plastic film and rolls up winding mechanism.

Preferably, the heating mechanism comprises two heating rollers and two tension rollers, the two heating rollers are distributed up and down, and the tension rollers are arranged on the upper side of the rear end of each heating roller at intervals. The tension roller is arranged, the position or the number of the tension roller can be adjusted according to needs, the open loop control can be selected for controlling the tension of the equipment, the heating roller is arranged, and the roll changing work is convenient to carry out.

Preferably, every pressing mechanism includes laminating roller and deflector roll, laminating roller is equipped with two, two interval distribution about the laminating roller is equipped with the deflector roll between the laminating roller lower extreme. Two press-fit rollers are arranged, one press-fit roller is a rubber press-fit roller, the other press-fit roller is a Teflon press-fit roller, and the Teflon press-fit rollers are in contact with the resin surface during press-fit. Teflon is not easy to glue, so that the influence on resin is small. The Teflon press roller does not contact with the adhesive film in the production process.

Preferably, every first glued membrane book unwinding mechanism includes that first glued membrane is rolled up, deflector roll, chill roll and tension roll, first glued membrane book surface is equipped with first glued membrane, the tension roll sets up at first glued membrane book rear end inboard, the chill roll sets up at tension roll rear end inboard, first glued membrane book and tension roll between, all be equipped with the deflector roll between tension roll and the chill roll.

Preferably, every first plastic film rolls up winding mechanism includes that first plastic film rolls up, deflector roll and tension roll, first plastic film rolls up and corresponds the setting and rolls up the rear end at a plurality of first plastic films, just first plastic film rolls up the external first plastic film in side, the tension roll sets up first plastic film and rolls up the front end inboard, between first plastic film roll and the tension roll, all be equipped with the deflector roll between tension roll and the chill roll.

Preferably, every second glued membrane book unwinding mechanism includes that second glued membrane book, deflector roll, chill roll and tension roll, the second glued membrane is rolled up the surface and is equipped with the second glued membrane, the tension roll sets up and rolls up the rear end inboard at the second glued membrane, the chill roll sets up at the tension roll rear end inboard, the second glued membrane is rolled up and is all equipped with the deflector roll between the tension roll, between tension roll and the chill roll.

Preferably, every second plastic film rolls up winding mechanism includes that second plastic film rolls up, deflector roll and dancer roll, second plastic film rolls up and corresponds the setting and rolls up the rear end at a plurality of first plastic films, just second plastic film rolls up the external second plastic film in side, the dancer roll sets up second plastic film and rolls up the front end inboard, between second plastic film roll and the dancer roll, all be equipped with the deflector roll between dancer roll and the cooling roller.

Preferably, each pressfitting roller outside all is equipped with the cutter, every all be equipped with a plurality of interval distribution's deflector roll between cutter and every chill roll. The cutter is arranged, so that the adhesive film can be conveniently cut at any time according to the control information.

Preferably, a paper breaking sensor is arranged between each heating roller and the pressing roller. And a paper breaking sensor is arranged, and when the paper breaking sensor detects that the adhesive film is broken, the control system sends alarm information and stops the machine for speed reduction.

The invention discloses an automatic roll changing and splicing device for an adhesive film and a continuous non-stop production method for prepreg, which comprises the following steps:

s1, a second adhesive film is supplied to a second adhesive film roll by a second adhesive film roll, and a second plastic film on the surface of the second adhesive film roll is cooled by a cooling roller and then is collected by a second plastic film roll;

s2, reel change preparation: the end part of the first adhesive film is adhered with a high-temperature resistant double-sided adhesive tape in advance. The first plastic film roll is installed at a set position, the first plastic film penetrates through guide rollers to reach a cooling roller along a set path in advance, the first plastic film on the surface of the first plastic film is peeled at the position of the cooling roller, and the peeled first plastic film is pulled to a first plastic film roll station along the set path and is adhered to a winding shaft of the installed first plastic film roll. And starting a first plastic film roll winding function to tension the first plastic film. And when the tension sensor receives the signal, the first plastic film roll enters a roll changing closed loop small tension rolling state. Continuously drawing the end part of the first adhesive film to enable the end part to reach the position of the laminating roller along the set path, wherein the surface of the laminating roller is provided with radial marking lines and axial scale marks, the end part of the first adhesive film is arranged in a fan-shaped vacuum adsorption area of the laminating roller, and the end part is aligned with the axial positioning marking lines of the laminating roller; and observing the scale mark numerical value of the edge of the second adhesive film on the surface of the opposite pressing roller under the working state of the second adhesive film, and drawing the edge of the first adhesive film to the position below the scale mark with the same numerical value of the pressing roller. And starting the pre-assembling completion button, and rotating the pressing roller under the driving of the servo motor to enable the end part of the first adhesive film to rotate to a position which exceeds the connecting line of the circle centers of the two pressing rollers by mm. At this time, the roll change preparation work is completed;

s3, roll changing work: when the second adhesive film tailing is insufficient, the control system judges according to the production state of the prepreg, when the second adhesive film cannot meet the requirement of the production of a new batch of prepreg, and when the prepreg being produced is finished, the control system sends a roll changing signal to the press-fit roller. The laminating roller is closed, the end part of the first adhesive film is pressed towards the second adhesive film under the driving of the laminating roller (the laminating roller does not rotate in a moving state), the laminating roller rotates at the surface linear speed which is the same as the running speed of the prepreg when the first adhesive film is in contact with the second adhesive film, and meanwhile, the second adhesive film is synchronously and instantly cut off by the cutter. The first adhesive film and the second adhesive film enable the adhesive tape to be firmly adhered under the pressure of the pressing roller, when the high-temperature adhesive tape between the first adhesive film and the second adhesive film passes through the pressing position of the pressing roller, the pressing roller is separated, and the control system controls the tension of the first adhesive film in a winding and unwinding mode in a closed-loop mode through a feedback signal of the tension sensor. When the adhesive tape bonding position of the first adhesive film and the second adhesive film enters the heating roller, the equipment is supplied by the first adhesive film, and the roll changing work is finished;

s4, in the roll changing process, when the paper breaking sensor detects that the glue film is broken, the control system sends alarm information and stops the machine to reduce the speed;

s5, manual/automatic recovery of the second film cutting part after roll changing is completed, subsequent disassembly is carried out to a fixed station, and a new roll of film is mounted in place;

and S6, the double-station roll changing work flow is the same, and when the tail material of the first adhesive film roll is insufficient, the second adhesive film roll repeats the roll changing work.

The working principle and the advantages of the invention are as follows:

(1) The invention relates to an automatic roll changing and receiving device for unwinding a glue film for prepreg production, which can realize the automatic roll changing work of the glue film with a sandwich structure. The device can realize the continuous non-stop production method of the prepreg, improve the production efficiency of equipment and reduce the workload of personnel.

(2) The invention is mainly used for the automatic roll receiving work of the composite material adhesive film, and can be used for the separation and the automatic roll receiving of two layers of materials (release paper and resin are used as one layer of material).

(3) The guide roller of the invention can be increased, decreased or adjusted according to actual needs.

(4) The tension roller of the invention can adjust the position or the number according to the requirement, and the tension control of the equipment can be selected by open loop control.

(5) The cooling roller is used for cooling resin, reduces the temperature of the resin, has low resin viscosity and is beneficial to stripping of a plastic film.

(6) The plastic film is mainly used for protecting resin, and after the plastic film is peeled, the resin layer can not be guided to a roller after the resin is exposed, so that the resin is prevented from being polluted or lost.

(7) The invention relates to a Teflon laminating machine, which comprises a rubber laminating roller and a Teflon laminating roller, wherein the Teflon laminating roller is in contact with a resin surface during laminating. Teflon is not easy to glue, so that the influence on resin is small. The Teflon press roller does not contact with the adhesive film in the production process.

Drawings

FIG. 1 is a schematic view of an automatic roll-changing and roll-receiving device for an adhesive film according to the present invention.

Reference numerals referred to in the drawings are:

the paper cutting machine comprises a first adhesive film roll 1.1, a second adhesive film roll 1.2, a first plastic film roll 2.1, a second plastic film roll 2.2, a guide roller 3, a cooling roller 4, a tension roller 5, a cutter 6, a pressing roller 7, a heating roller 8, a paper breaking sensor 9, a first adhesive film 10.1, a second adhesive film 10.2, a first plastic film 11.1 and a second plastic film 11.2.

Detailed Description

The following is further detailed by the specific embodiments:

the first embodiment is as follows:

as shown in fig. 1, the automatic roll changing and rolling device for the adhesive film comprises a first adhesive film roll unwinding mechanism, a second adhesive film roll unwinding mechanism, a first plastic film roll winding mechanism, a second plastic film roll winding mechanism, a pressing mechanism and a heating mechanism, wherein the pressing mechanism is distributed at intervals on the upper side and the lower side of the heating mechanism, the first adhesive film roll unwinding mechanism is arranged on the outer side of each pressing mechanism, the second adhesive film roll unwinding mechanism is arranged at the front end of each first adhesive film roll unwinding mechanism at intervals, the first plastic film roll winding mechanism is arranged at the rear end of each first adhesive film roll unwinding mechanism, and the second plastic film roll winding mechanism is arranged at the rear end of each second adhesive film roll unwinding mechanism.

The heating mechanism comprises two heating rollers 8 and two tension rollers 5, the two heating rollers 8 are distributed up and down, and the tension rollers 5 are arranged on the upper side of the rear end of each heating roller 8 at intervals. The tension roller 5 is arranged, the position or the number of the tension roller 5 can be adjusted according to needs, the open-loop control can be selected for controlling the tension of the equipment, and the heating roller 8 is arranged, so that the roll changing work is convenient.

Every pressing mechanism includes laminating roller 7 and deflector roll 3, and laminating roller 7 is equipped with two, and interval distribution about two laminating rollers 7 is equipped with deflector roll 3 between 7 lower extremes of two laminating rollers. Two press-fit rollers 7 are arranged, one press-fit roller 7 is a rubber press-fit roller, the other press-fit roller is a Teflon press-fit roller, and the Teflon press-fit roller is in contact with the resin surface during press-fit. Teflon is not easy to glue, so that the influence on resin is small. The Teflon press roller does not contact with the adhesive film in the production process.

Every first glued membrane book unreels mechanism includes that first glued membrane rolls up 1.1, deflector roll 3, chill roll 4 and tension roll 5, and first glued membrane book 1.1 surface is equipped with first glued membrane 10.1, and tension roll 5 sets up at first glued membrane book 1.1 rear end inboard, and chill roll 4 sets up at tension roll 5 rear end inboard, and between first glued membrane book 1.1 and the tension roll 5, all be equipped with deflector roll 3 between tension roll 5 and the chill roll 4.

Every first plastic film rolls up winding mechanism includes that first plastic film rolls up 2.1, deflector roll 3 and tension roll 5, and first plastic film rolls up 2.1 and corresponds the setting and roll up 1.1 rear end at a plurality of first plastic films, and first plastic film rolls up 2.1 external first plastic film 11.1 in side, and tension roll 5 sets up first plastic film and rolls up 2.1 front end inboardly, and first plastic film rolls up between 2.1 and the tension roll 5, all is equipped with deflector roll 3 between tension roll 5 and the chill roll 4.

Every second glued membrane book unreels mechanism includes that second glued membrane book 1.2, deflector roll 3, chill roll 4 and tension roll 5, and second glued membrane book 1.2 surfaces are equipped with second glued membrane 10.2, and tension roll 5 sets up at second glued membrane book 1.2 rear end inboardly, and chill roll 4 sets up at tension roll 5 rear end inboardly, and between second glued membrane book 1.2 and the tension roll 5, all be equipped with deflector roll 3 between tension roll 5 and the chill roll 4.

Every second plastic film rolls up winding mechanism includes that second plastic film rolls up 2.2, deflector roll 3 and tension roll 5, and second plastic film rolls up 2.2 and corresponds the setting and roll up 1.1 rear end at a plurality of first plastic films, and second plastic film rolls up 2.2 external second plastic films in side 11.2, and tension roll 5 sets up second plastic film and rolls up 2.2 front end inboards, and second plastic film rolls up between 2.2 and the tension roll 5, all is equipped with deflector roll 3 between tension roll 5 and the chill roll 4.

The outer side of each pressing roller 7 is provided with a cutter 6, and a plurality of guide rollers 3 which are distributed at intervals are arranged between each cutter 6 and each cooling roller 4. Set up cutter 6, conveniently cut the glued membrane according to control information at any time.

And a paper breaking sensor 9 is arranged between each heating roller 8 and the press-fit roller 7. Set up disconnected paper sensor 9, when disconnected paper sensor 9 detects the glued membrane fracture, control system sends alarm information and shuts down the processing of slowing down.

The automatic roll changing and splicing device for the adhesive film and the continuous non-stop production method for the prepreg comprise the following steps:

s1, a second adhesive film 10.2 is supplied from a second adhesive film roll 1.2, and a second plastic film 11.2 on the surface of the second adhesive film roll 1.2 is cooled by a cooling roller 4 and then is collected by a second plastic film roll 2.2;

s2, reel change preparation: the end of the first adhesive film 10.1 is adhered with a high-temperature resistant double-sided adhesive tape in advance. The first plastic film roll 1.1 is installed at a set position, the first plastic film 10.1 penetrates through each guide roller 3 to reach the cooling roller 4 along a set path in advance, the first plastic film 11.1 on the surface of the first plastic film 10.1 is peeled at the position of the cooling roller 4, and the peeled first plastic film 11.1 is drawn to the first plastic film roll 2.1 station along the set path and is pasted on a winding shaft of the installed first plastic film roll 2.1. And starting a rolling function of the first plastic film roll 2.1, and tensioning the first plastic film 11.1. When the tension sensor receives the signal, the first plastic film roll 2.1 enters a roll changing closed loop small tension rolling state. Continuously drawing the end part of the first adhesive film 10.1 to enable the end part to reach the position of the pressing roller 7 along the set path, wherein the surface of the pressing roller 7 is provided with radial marking lines and axial scale marks, the end part of the first adhesive film 10.1 is arranged in a fan-shaped vacuum adsorption area of the pressing roller 7, and the end part is aligned with the axial positioning marking lines of the pressing roller 7; and observing the scale mark numerical value of the edge of the second adhesive film 10.2 on the surface of the opposite pressing roller 7 under the working state of the second adhesive film 10.2, and drawing the edge of the first adhesive film 10.1 under the scale mark with the same numerical value of the pressing roller 7. And starting the pre-assembling completion button, and rotating the pressing roller 7 under the driving of the servo motor to rotate the end part of the first adhesive film 10.1 to a position which exceeds the connecting line of the circle centers of the two pressing rollers 7 by 10mm. At this time, the roll change preparation work is completed;

s3, roll changing work: when the second adhesive film 10.2 is insufficient in tailing, the control system judges according to the production state of the prepreg that the second adhesive film 10.2 cannot meet the requirement of production of a new batch of prepreg, and when the prepreg being produced is finished, the control system sends a roll changing signal to the press-fit roller 7. The pressing roller 7 is closed, the end part of the first adhesive film 10.1 is pressed towards the second adhesive film 10.2 under the driving of the pressing roller 7 (the pressing roller 7 does not rotate in a moving state), the pressing roller 7 rotates at the surface linear velocity same as the prepreg running velocity while the first adhesive film 10.1 is in contact with the second adhesive film 10.2, and meanwhile, the second adhesive film 10.2 is synchronously and instantly cut off by the cutter 6. The first adhesive film 10.1 and the second adhesive film 10.2 enable the adhesive tapes to be firmly adhered under the pressure of the pressing roller 7, when the high-temperature adhesive tape between the first adhesive film 10.1 and the second adhesive film 10.2 passes through the pressing position of the pressing roller 7, the pressing roller 7 is separated, and the control system controls the unwinding tension of the first adhesive film roll 1.1 in a closed-loop manner through a feedback signal of the tension sensor. After the adhesive tape joint of the first adhesive film 10.1 and the second adhesive film 10.2 enters the heating roller 8, the equipment is supplied by the first adhesive film 10.1, and the roll changing work is finished;

s4, in the roll changing process, when the paper breaking sensor 9 detects that the adhesive film is broken, the control system sends alarm information and stops the machine to reduce the speed;

s5, manually/automatically recovering the 10.2 cut part of the second adhesive film after the roll is changed, subsequently disassembling the fixed station, and waiting for the new roll of adhesive film to be installed in place;

and S6, the double-station roll changing work flow is the same, and when the tailing of the first adhesive film roll 1.1 is insufficient, the roll changing work of the second adhesive film roll 1.2 is repeated.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims (10)

1. Automatic reel changing and reel receiving device of adhesive film is characterized in that: including that unwinding mechanism is rolled up to first glued membrane, second glued membrane roll unwinding mechanism, first plastic film roll winding mechanism, second plastic film roll winding mechanism, pressing mechanism and heating mechanism, both sides all are equipped with interval distribution's pressing mechanism about the heating mechanism, every the pressing mechanism outside all is equipped with first glued membrane and rolls up unwinding mechanism, every the equal spaced unwinding mechanism that is equipped with of unwinding mechanism front end is rolled up to first glued membrane, every unwinding mechanism rear end is rolled up to first glued membrane all is equipped with first plastic film and rolls up winding mechanism, every second glued membrane rolls up unwinding mechanism rear end and all is equipped with second plastic film and rolls up winding mechanism.

2. The automatic roll-changing and roll-receiving device for the adhesive film according to claim 1, wherein: the heating mechanism comprises two heating rollers and two tension rollers, the two heating rollers are distributed up and down, and the tension rollers are arranged on the upper side of the rear end of each heating roller at intervals.

3. The automatic roll changing and splicing device for the adhesive film according to claim 2, wherein: every pressing mechanism includes pressfitting roller and deflector roll, the pressfitting roller is equipped with two, two interval distribution about the pressfitting roller, two be equipped with the deflector roll between the pressfitting roller lower extreme.

4. The automatic roll changing and receiving device for the adhesive film according to claim 3, wherein: every first glued membrane book unreels mechanism includes that first glued membrane is rolled up, deflector roll, chill roll and tension roll, first glued membrane is rolled up the surface and is equipped with first glued membrane, the tension roll sets up and rolls up the rear end inboard at first glued membrane, the chill roll sets up at the tension roll rear end inboard, all be equipped with the deflector roll between first glued membrane book and the tension roll, between tension roll and the chill roll.

5. The automatic roll changing and receiving device for the adhesive film according to claim 4, wherein: every first plastic film rolls up winding mechanism includes that first plastic film rolls up, deflector roll and tension roll, first plastic film rolls up and corresponds the setting and roll up the rear end at a plurality of first plastic films, just first plastic film rolls up the external first plastic film in side, the tension roll sets up first plastic film and rolls up the front end inboard, first plastic film rolls up and all is equipped with the deflector roll between with the tension roll, between tension roll and the chill roll.

6. The automatic roll-changing and roll-receiving device for the adhesive film according to claim 5, wherein: every second glued membrane book unreels mechanism includes that second glued membrane book, deflector roll, chill roll and tension roll, the second glued membrane is rolled up the surface and is equipped with the second glued membrane, the tension roll sets up and rolls up the rear end inboard at the second glued membrane, the chill roll sets up at the tension roll rear end inboard, between second glued membrane book and the tension roll, all be equipped with the deflector roll between tension roll and the chill roll.

7. The automatic roll-changing and roll-receiving device for the adhesive film according to claim 6, wherein: every second plastic film rolls up winding mechanism includes that second plastic film rolls up, deflector roll and tension roll, second plastic film rolls up and corresponds to set up and roll up the rear end at a plurality of first plastic films, just second plastic film rolls up the external second plastic film in side, the tension roll sets up second plastic film and rolls up the front end inboard, second plastic film rolls up and all is equipped with the deflector roll between with the tension roll, between tension roll and the chill roll.

8. The automatic roll changing and receiving device for the adhesive film according to claim 7, wherein: every the laminating roller outside all is equipped with the cutter, every all be equipped with a plurality of interval distribution's deflector roll between cutter and every chill roll.

9. The automatic roll-changing and roll-receiving device for the adhesive film according to claim 8, wherein: and a paper breaking sensor is arranged between each heating roller and the pressing roller.

10. The automatic roll changing and splicing device for the adhesive film according to claim 9 and the continuous non-stop production method for the prepreg are characterized in that: the method comprises the following steps:

s1, a second adhesive film is supplied to a second adhesive film roll by a second adhesive film roll, and a second plastic film on the surface of the second adhesive film roll is cooled by a cooling roller and then is collected by a second plastic film roll;

s2, reel change preparation: the end part of the first adhesive film is adhered with a high-temperature resistant double-sided adhesive tape in advance. The first plastic film roll is installed at a set position, the first plastic film penetrates through guide rollers to reach a cooling roller along a set path in advance, the first plastic film on the surface of the first plastic film is peeled at the position of the cooling roller, and the peeled first plastic film is pulled to a first plastic film roll station along the set path and is adhered to a winding shaft of the installed first plastic film roll. And starting a first plastic film roll winding function to tension the first plastic film. And when the tension sensor receives the signal, the first plastic film roll enters a roll changing closed loop small tension rolling state. Continuously drawing the end part of the first adhesive film to enable the end part to reach the position of the laminating roller along the set path, wherein the surface of the laminating roller is provided with radial marking lines and axial scale marks, the end part of the first adhesive film is arranged in a fan-shaped vacuum adsorption area of the laminating roller, and the end part is aligned with the axial positioning marking lines of the laminating roller; and observing the scale mark numerical value of the edge of the second adhesive film on the surface of the opposite pressing roller under the working state of the second adhesive film, and drawing the edge of the first adhesive film to the position below the scale mark with the same numerical value of the pressing roller. And starting the pre-assembling completion button, and rotating the pressing roller under the driving of the servo motor to enable the end part of the first adhesive film to rotate to a position which exceeds the connecting line of the circle centers of the two pressing rollers by mm. At this time, the roll change preparation work is completed;

s3, roll changing work: when the second adhesive film tailing is insufficient, the control system judges according to the production state of the prepreg, when the second adhesive film cannot meet the requirement of the production of a new batch of prepreg, and when the prepreg being produced is finished, the control system sends a roll changing signal to the press-fit roller. The laminating roller is closed, the end part of the first adhesive film is pressed towards the second adhesive film under the driving of the laminating roller (the laminating roller does not rotate in a moving state), the laminating roller rotates at the surface linear speed which is the same as the running speed of the prepreg when the first adhesive film is in contact with the second adhesive film, and meanwhile, the second adhesive film is synchronously and instantly cut off by the cutter. The first adhesive film and the second adhesive film enable the adhesive tape to be firmly adhered under the pressure of the pressing roller, when the high-temperature adhesive tape between the first adhesive film and the second adhesive film passes through the pressing position of the pressing roller, the pressing roller is separated, and the control system controls the tension of the first adhesive film in a winding and unwinding mode in a closed-loop mode through a feedback signal of the tension sensor. After the adhesive tape bonding position of the first adhesive film and the second adhesive film enters the heating roller, the equipment is supplied by the first adhesive film, and the roll changing work is finished;

s4, in the roll changing process, when the paper breaking sensor detects that the glue film is broken, the control system sends alarm information and stops the machine to reduce the speed;

s5, manual/automatic recovery of the second film cutting part after roll changing is completed, subsequent disassembly is carried out to a fixed station, and a new roll of film is mounted in place;

and S6, the double-station roll changing work flow is the same, and when the tail material of the first adhesive film roll is insufficient, the second adhesive film roll repeats the roll changing work.

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