阅读说明：本技术 一种膜的分切收卷方法 (Slitting and winding method of film ) 是由 袁涛 袁敏华 陈晓 陈建伟 于 2021-04-15 设计创作，主要内容包括：本发明涉及一种膜的分切收卷方法,窗膜自大卷窗膜上向前输送,先将窗膜的前边缘整体切除,再将窗膜前边缘处的离型膜层切除1～5cm从而露出安装胶层；将安装胶层沿卷筒轴向粘附在卷筒的外周壁上,再将窗膜层层卷绕在卷筒上；待卷筒上窗膜的卷绕厚度或长度达到要求后,将窗膜整体切断。本发明利用窗膜自身特性,在对窗膜进行卷绕前,将窗膜前边缘处1～5cm的离型膜层切除,使安装胶层露出,然后利用窗膜自带且裸露出来的该安装胶层将窗膜前边缘固定在卷筒上,再对窗膜进行卷绕,由于在卷绕时不再需要粘贴双面胶层,消除了窗膜与卷筒接触处的厚度差,从而避免了凸起的产生,解决了窗膜变形问题,避免了窗膜的大面积浪费,有效提高了窗膜的使用率。(The invention relates to a film slitting and winding method, wherein a window film is conveyed forwards from a large-roll window film, the front edge of the window film is integrally cut off, and then a release film layer at the front edge of the window film is cut off by 1-5 cm so as to expose an installation adhesive layer; adhering the mounting adhesive layer to the outer peripheral wall of the winding drum along the axial direction of the winding drum, and winding the window film layer by layer on the winding drum; and after the winding thickness or length of the window film on the winding drum meets the requirement, cutting off the whole window film. According to the invention, by utilizing the characteristics of the window film, before the window film is wound, the release film layer with the length of 1-5 cm at the front edge of the window film is cut off to expose the mounting adhesive layer, then the front edge of the window film is fixed on the winding drum by utilizing the mounting adhesive layer which is carried by the window film and is exposed, and then the window film is wound.)

1. A slitting and winding method of a membrane is characterized in that: the method comprises the following steps:

(1) the window film is conveyed forwards from the large-roll window film, the front edge of the window film is cut off integrally, and the release film layer at the front edge of the window film is cut off by 1-5 cm, so that the mounting adhesive layer is exposed;

(2) adhering the mounting adhesive layer to the outer peripheral wall of the winding drum along the axial direction of the winding drum, and winding the window film layer by layer on the winding drum;

(3) and after the winding thickness or length of the window film on the winding drum meets the requirement, cutting off the whole window film.

2. The slitting and winding method of a film according to claim 1, characterized in that: the cutting action of window membrane is gone on the dull and stereotyped that induced drafts, arranges the window membrane in on the upper surface of the dull and stereotyped that induced drafts, the both ends of the dull and stereotyped that induced drafts are provided with the rubber tyer that is used for compressing tightly the window membrane respectively, it is provided with the cutting mechanism who is used for cutting the window membrane to induced draft dull and stereotyped top.

3. A slitting and winding method of a film according to claim 2, characterized in that: the air suction flat plate is internally hollow to form an air guide cavity, the upper surface of the air suction flat plate is provided with a plurality of first air suction ports communicated with the air guide cavity, and the side wall or the bottom wall of the air suction flat plate is provided with a second air suction port communicated with the air guide cavity.

4. A slitting and winding method of a film according to claim 2, characterized in that: the cutting mechanism comprises a first blade for cutting off the whole window film and a second blade for cutting off the release film layer of the window film, and the second blade is 23-25 um away from the window film to be cut in the cutting state.

5. A slitting and winding method of a film according to claim 4, characterized in that: the cutting mechanism further comprises a track and a connecting piece, the track is located above the air suction flat plate and arranged along the cutting direction of the window film, the connecting piece can be arranged on the track in a reciprocating mode, and the first blade and the second blade are constrained on the connecting piece in a front-back side-by-side mode.

6. A slitting and winding method of a film according to claim 5, characterized in that: and two ends of the track are respectively provided with a limiter capable of restraining the positions of the first blade and the second blade.

7. A slitting and winding method of a film according to claim 5, characterized in that: the first blade and the second blade can be arranged on the connecting piece in a vertically moving mode, a sensor capable of detecting the height of the first blade and the second blade relative to the window film to be cut is arranged on the connecting piece, and the sensor is in electric signal connection with the controller.

8. A slitting and rolling method of a film according to any one of claims 1 to 7, characterized in that: when the release film layer is cut off, the included angle between the cutting tool and the release film layer to be cut off is 95-135 degrees.

Technical Field

The invention relates to the technical field of film production and manufacturing, in particular to a slitting and winding method of a film.

Background

The window film product has wide market prospect due to energy conservation, environmental protection and convenient installation. The paint is mostly applied to industries such as buildings, automobiles, safety and the like, and has the functions of ultraviolet resistance, heat insulation, explosion prevention and the like.

Fig. 1 shows a structure of a conventional window film having a release film layer 10, a mounting adhesive layer 20, a core functional layer 30, and an abrasion resistant layer 40 sequentially adhered together. The release film layer is used for isolating and protecting the mounting adhesive layer, and when the window film is actually used, the release film layer needs to be removed, and the window film is adhered to the window glass by the mounting adhesive layer; the core functional layer is provided with a material layer with the functions of ultraviolet resistance, heat insulation and the like.

In the production process of the window film, the large-roll window film needs to be cut and rolled to form a window film roll with a specific thickness or length. The current method of rolling window film is to roll the window film on a roll. When the window film is rolled, a double-sided adhesive layer is adhered to the outer peripheral wall of the winding drum along the axial direction, the front edge of the window film is fixed through the double-sided adhesive layer, the window film is wound on the winding drum layer by layer, and the window film is cut off after the thickness or the length of the window film roll meets the requirement.

The thickness of the double-sided adhesive layer that can provide in the market is 0.05mm and above, because the local thickness difference that has this double-sided adhesive layer and bring of reel, in the scope of twining certain thickness, can cause the local radial bulge along reel axial extension of window membrane because of this thickness difference, this bulge can lead to the window membrane to warp and produce glue mark, offset printing because of the influence of storage time and window membrane shrink stress is inevitable because of this arch department, and the window membrane of deformation can produce the light refraction problem, and unable the use can only be abandoned. The window film waste caused by the problem is very serious, and 1-5 m of window film on each winding drum needs to be abandoned, so that the usability of the product is seriously reduced.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a film slitting and winding method which avoids the generation of bulges by eliminating the thickness difference of the contact part of a window film and a winding drum, further eliminates the problem of local deformation of the window film and improves the utilization rate of the window film.

The technical scheme adopted by the invention for solving the technical problems is as follows: a slitting and winding method of a membrane is characterized in that: the method comprises the following steps:

(1) the window film is conveyed forwards from the large-roll window film, the front edge of the window film is cut off integrally, and then the release film layer at the front edge of the window film is cut off by 1-5 cm, so that the mounting adhesive layer is exposed;

(2) adhering the mounting adhesive layer to the outer peripheral wall of the winding drum along the axial direction of the winding drum, and winding the window film layer by layer on the winding drum;

(3) and after the winding thickness or length of the window film on the winding drum meets the requirement, cutting off the whole window film.

Preferably, the cutting action of the window membrane is carried out on the air suction flat plate, the window membrane is arranged on the upper surface of the air suction flat plate, rubber wheels used for pressing the window membrane are respectively arranged at two ends of the air suction flat plate, and a cutting mechanism used for cutting the window membrane is arranged above the air suction flat plate. Carry out the overall positioning to the window membrane through the flat board that induced drafts, force the location to the window membrane edge through the rubber tyer to ensure that the cutting position is accurate, avoid the window membrane to remove and lead to cutting error in cutting process.

Preferably, the air suction flat plate is internally hollow to form an air guide cavity, the upper surface of the air suction flat plate is provided with a plurality of first air suction ports communicated with the air guide cavity, and the side wall or the bottom wall of the air suction flat plate is provided with a second air suction port communicated with the air guide cavity. The second air suction opening is connected with a suction fan through a hose so as to provide negative pressure for the air guide cavity and realize the adsorption and positioning of the first air suction opening on the window film.

In the invention, the cutting mechanism comprises a first blade for cutting off the whole window film and a second blade for cutting off only the release film layer of the window film, and the height of the second blade from the window film to be cut is 23-25 um in a cutting state. The thickness of a release film layer of an existing window film is generally 23um, the thickness of a mounting adhesive layer is generally 6-8 um, and when the release film layer is cut, the cutting depth is allowed to exceed the thickness of the release film layer but cannot exceed the sum of the thicknesses of the release film layer and the mounting adhesive layer.

The cutting mechanism further comprises a track and a connecting piece, the track is located above the air suction flat plate and arranged along the cutting direction of the window film, the connecting piece can be arranged on the track in a reciprocating mode, and the first blade and the second blade are constrained on the connecting piece in a front-back side-by-side mode. The track can be a lead screw or the combination of the lead screw and the track, and the local part of the connecting piece is a nut pair which can be matched with the lead screw, and the structure is the prior mature technology and is not described in detail herein.

Preferably, both ends of the track are respectively provided with a stopper capable of restricting the positions of the first blade and the second blade.

Preferably, the first blade and the second blade are arranged on the connecting piece in a vertically movable manner, a sensor capable of detecting the height of the first blade and the second blade relative to the window film to be cut is arranged on the connecting piece, and the sensor is in electrical signal connection with the controller. The height of first blade, second blade is convenient for adjust according to actual cutting needs to above-mentioned structure, and this altitude mixture control can be realized for orbital high through the connecting piece, for example through linear electric motor drive or through other structural style, and this structure is current mature technology, does not need to be repeated here.

Preferably, when the release film layer is cut off, the included angle between the cutting tool and the release film layer to be cut off is 95-135 degrees. Cutting like this can make the incision limit from type rete inseparabler with the reel laminating, and the too big cutting effect that can influence the blade of angle.

Compared with the prior art, the invention has the advantages that: according to the invention, by utilizing the characteristics of the window film, before the window film is wound, the release film layer with the length of 1-5 cm at the front edge of the window film is cut off to expose the mounting adhesive layer, then the front edge of the window film is fixed on the winding drum by utilizing the mounting adhesive layer which is carried by the window film and is exposed, and then the window film is wound.

Drawings

FIG. 1 is a schematic structural diagram of the background art of the present invention;

FIG. 2 is a diagram of the cooperating slitting and winding of the slitting machine and the slitting mechanism in the embodiment of the invention;

FIG. 3 is a schematic view of a window film after cutting according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cutting mechanism according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 4, the present embodiment provides a method for slitting and winding a film, which needs an existing slitting machine to be matched with the cutting mechanism 1 of the present embodiment. The structure of the existing splitting machine is the existing mature technology, and is not described herein.

The slitting and winding method of the film comprises the following steps:

(1) the window film 100 is conveyed forwards from the large-roll window film 2, the front edge of the window film 100 is cut off integrally, and then the release film layer 10 at the front edge of the window film 100 is cut off by 1-5 cm, so that the mounting adhesive layer 20 is exposed;

(2) adhering the mounting adhesive layer 20 to the outer peripheral wall of the winding drum 3 along the axial direction of the winding drum 3, and then winding the window film 100 on the winding drum 3 layer by layer;

(3) and after the winding length of the window film 100 on the winding drum 3 reaches a set number of meters, cutting the whole window film 100 to obtain a wound window film roll.

The cutting action of the window film 100 is performed on the air suction flat plate 4, the window film 100 is arranged on the upper surface of the air suction flat plate 4, rubber wheels 5 used for pressing the window film 100 are respectively arranged at two ends of the air suction flat plate 4, and the cutting mechanism 1 is arranged above the air suction flat plate 4. The window film 100 is integrally positioned through the air suction flat plate 4, and the edge of the window film 100 is forcibly positioned through the rubber wheel 5, so that the accuracy of the cutting position is ensured, and the window film 100 is prevented from moving in the cutting process and causing cutting errors.

The air suction flat plate 4 is hollow to form an air guide cavity, the upper surface of the air suction flat plate 4 is provided with a plurality of first air suction ports communicated with the air guide cavity, and the side wall of the air suction flat plate 4 is provided with a second air suction port 41 communicated with the air guide cavity. The second air suction opening 41 is connected with a suction fan through a hose so as to provide negative pressure for the air guide cavity and realize the adsorption and positioning of the first air suction opening on the window film 100.

The cutting mechanism 1 of the present embodiment includes a first blade 11, a second blade 12, a rail 13, and a connecting member 14. The first blade 11 is used to cut the window film 100 as a whole, and the second blade 12 is used to cut only the release film layer 10 of the window film 100, and in the cutting state, the first blade 11 is located at the front side of the second blade 12, and the lower edge of the first blade 11 is lower than the lower edge of the second blade 12. The first blade 11 and the second blade 12 may be circular blades or straight blades. The height of the second blade 12 from the window film 100 to be cut is 23um to 25 um. The thickness of the release film layer 10 of the existing window film is generally 23um, the thickness of the installation adhesive layer 20 is generally 6-8 um, and when the release film layer 10 is cut, the cutting depth is allowed to exceed the thickness of the release film layer 10 but cannot exceed the sum of the thicknesses of the release film layer 10 and the installation adhesive layer 20.

The rail 13 is located above the suction plate 4 and arranged along the cutting direction of the window film 10, the connecting piece 14 is arranged on the rail 13 in a reciprocating manner, and the first blade 11 and the second blade 12 are constrained on the connecting piece 14 in a front-back side-by-side manner. And two ends of the track 13 are respectively provided with a limiting stopper 15 capable of limiting the positions of the first blade 11 and the second blade 12. The track 13 may be a lead screw or a combination of the lead screw and the track, and a part of the connecting member 14 is a nut pair capable of cooperating with the lead screw, and the structure is the prior mature technology and is not described herein.

The first blade 11 and the second blade 12 of the present embodiment are disposed on the connecting member 14 in a manner of being capable of moving up and down, a sensor 16 capable of detecting the height of the first blade 11 and the second blade 12 relative to the window film 100 to be cut is disposed on the connecting member 14, and the sensor 16 is electrically connected to the controller. The above structure facilitates adjusting the heights of the first blade 11 and the second blade 12 according to actual cutting requirements, and the height adjustment can be realized by the height of the connecting member 14 relative to the track 13, for example, by driving of a linear motor or by other structural means, and the structure is a mature technology in the prior art and is not described herein.

When the release film layer 10 is cut off, the included angle a between the second blade 12 and the release film layer 10 to be cut off is 95-135 degrees, namely, when the second blade 12 is installed, the installation angle of the second blade 12 can be adjusted to realize the cutting function. The cutting mode can ensure that the cut of the release film layer 10 is attached to the winding drum 3 more tightly.

In this embodiment, a large roll of window film 2 can be cut and rolled into a plurality of small window film rolls, and the cutting and rolling process is a continuous process, therefore, the whole cutting of the window film 100 in this embodiment is completed synchronously with the cutting process of only the release film layer 10, that is: when each window film roll is rolled up, the cutting mechanism 1 cuts off the whole window film 100 and cuts off the release film layer 10 at the front edge of the next window film 100 to be rolled. The specific slitting and winding process of the window film 100 is as follows:

(1) the window film 100 is conveyed forwards from the large-roll window film 2 until the front edge of the window film 100 is placed on the air suction flat plate 4, the edge of the window film 100 is pressed on the air suction flat plate 4 through the rubber wheel 5, then the tensile tension of the window film 100 is adjusted to 20N-50N to keep the window film 100 flat, the first blade 11 and the second blade 12 of the cutting mechanism 1 reciprocate along with the connecting piece 14, the first blade 11 integrally cuts off the front edge of the window film 100, and meanwhile, the second blade 12 cuts off the release film layer 10 at the front edge of the window film 100 by 3cm to expose the mounting rubber layer 20;

(2) the pressing and holding action of the rubber wheel 5 and the adsorption and positioning of the air suction flat plate 4 are cancelled, the cut window film 100 is pulled forwards, the mounting rubber layer 20 is adhered to the outer peripheral wall of the winding drum 3 along the axial direction of the winding drum 3, and then the window film 100 is wound on the winding drum 3 layer by layer;

(3) after the winding length of the window film 100 on the winding drum 3 reaches a set number of meters, positioning the window film 100 by using the air suction flat plate 4 and the rubber wheel 5 again, operating the cutting mechanism 1, integrally cutting off the front part of the window film 100 by using the first blade 11, and simultaneously cutting off the release film layer 10 at the front edge of the window film 100 by using the second blade 12 for 1-5 cm so as to expose the mounting rubber layer 20;

(4) and (4) repeating the steps (2) and (3) to continuously cut and wind the window film.

The embodiment utilizes the characteristics of the window film 100, before the window film 100 is wound, the release film layer 10 with the length of 1-5 cm at the front edge of the window film 100 is cut off, the mounting adhesive layer 20 is exposed, then the mounting adhesive layer 20 with the exposed window film 100 is utilized to fix the front edge of the window film 100 on the winding drum 3, and then the window film 100 is wound.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.