阅读说明：本技术 点阵薄膜生产工艺及设备 (Dot matrix film production process and equipment ) 是由 覃勇 于 2020-12-30 设计创作，主要内容包括：本发明属于印刷领域,涉及一种点阵薄膜生产工艺及设备,所述点阵薄膜生产工艺报考：打印工艺,在薄膜表面打印点阵；覆膜,在打印了点阵的薄膜表面覆保护膜；膜切,将涂覆保护膜的薄膜裁切成预定尺寸；检测,检测膜切后的薄膜表面是否有缺陷,并标记有缺陷的薄膜；分离收料,分离收集标记有缺陷的薄膜和未标记的薄膜。本发明的点阵薄膜生产工艺及设备,能够快速的生产点阵薄膜,生产周期短,有效降低了制版的成本。(The invention belongs to the field of printing, and relates to a dot matrix film production process and equipment, wherein the dot matrix film production process is characterized in that: printing process, printing dot matrix on the surface of the film; covering a film, namely covering a protective film on the surface of the film printed with the dot matrix; cutting the film coated with the protective film into preset sizes; detecting, namely detecting whether the surface of the film after film cutting is defective or not, and marking the defective film; and separating and collecting the materials, namely separating and collecting the films marked with defects and the films not marked. The dot matrix film production process and the dot matrix film production equipment can rapidly produce dot matrix films, have short production period and effectively reduce the plate making cost.)

1. A dot matrix film production process is characterized by comprising the following steps:

printing process, printing dot matrix on the surface of the film;

covering a film, namely covering a protective film on the surface of the film printed with the dot matrix;

cutting the film coated with the protective film into preset sizes;

detecting, namely detecting whether the surface of the film after film cutting is defective or not, and marking the defective film;

and separating and collecting the materials, namely separating and collecting the films marked with defects and the films not marked.

2. The dot matrix film production process of claim 1, wherein the printing process comprises:

drying the surface of the film;

carrying out dust removal and static electricity removal treatment on the surface of the dried film;

detecting and adjusting the speed of the film entering the dot matrix printing module;

performing dot matrix printing on the film;

and drying the film after the dot matrix printing.

3. The dot matrix film production process according to claim 2, further comprising, between the printing process and the cover film: and (4) a gap bridge process, namely pressing the film printed with the dot matrix into a film coating mechanism.

4. The dot matrix film process of claim 1, wherein the film is cut in an up-cut manner.

5. The dot matrix film production process of claim 4, further comprising, between the cutting and the inspecting: and (4) speed adjustment, namely feeding the film after film cutting into the detection and separation mechanism at a speed higher than a first conveying speed, wherein the first conveying speed refers to the conveying speed of the film before film cutting.

6. A dot matrix film production apparatus adopting the dot matrix film production process according to any one of claims 1 to 5, characterized by comprising: conveying mechanism, printing mechanism, tectorial membrane mechanism, die-cutting mechanism and detection separating mechanism.

7. The dot matrix film production apparatus according to claim 6, wherein the printing mechanism comprises: the device comprises a first drying module, a dust removal and static elimination module, a speed detection module, a dot matrix printing module and a second drying module which are sequentially arranged on the conveying mechanism.

8. The dot matrix film production apparatus according to claim 7, wherein the film cutting mechanism comprises: a cutting die arranged on the conveying mechanism and a backing plate positioned on the cutting die.

9. The dot matrix film production apparatus according to claim 8, wherein said detection separation mechanism comprises: the CCD detection device, the signal detector, the turning plate, the finished product collection device and the defective product collection device are sequentially arranged on the conveying mechanism, the opening and closing of the turning plate is controlled through feedback signals of the signal detector, and defective products and finished products are separated and respectively placed into the defective product collection device and the finished product collection device.

10. The dot matrix film production equipment according to claim 6, further comprising a limiting mechanism, wherein the drying limiting mechanism comprises a plurality of groups of limiting rollers, the second drying module is a UV curing lamp, and the plurality of groups of limiting rollers are used for guiding the dot matrix film to form an inwards concave arc shape below the UV curing lamp.

Technical Field

The invention relates to the technical field of printing, in particular to a dot matrix film production process and dot matrix film production equipment.

Background

With the continuous improvement of the living standard of people, higher requirements are put forward on the performance and the application of commodities while the basic practical value of the commodities is pursued. The requirements for printable films attached to mobile phone screens, household appliance panel surface layers, electronic product shells, high-grade gifts, commercial books and periodicals and high-grade packaging boxes are increasing.

In order to meet the definition of patterns on the film, the printing precision of the film is required to reach 600dpi, but the traditional screen printing and flexo printing modes are difficult to meet the precision requirement, the plate making period is long, and the cost is high.

Disclosure of Invention

The invention aims to provide a dot matrix film production process, which is used for solving the problems of long plate making period, high cost and low precision of a printed film in the prior art.

The invention provides a dot matrix film production process, which comprises the following steps:

printing process, printing dot matrix on the surface of the film;

covering a film, namely covering a protective film on the surface of the film printed with the dot matrix;

cutting the film coated with the protective film into preset sizes;

detecting, namely detecting whether the surface of the film after film cutting is defective or not, and marking the defective film;

and separating and collecting the materials, namely separating and collecting the films marked with defects and the films not marked.

Preferably, the printing process comprises:

drying the surface of the film;

carrying out dust removal and static electricity removal treatment on the surface of the dried film;

detecting and adjusting the speed of the film entering the dot matrix printing module;

performing dot matrix printing on the film;

and drying the film after the dot matrix printing.

Preferably, the printing process and the covering film further include: and (4) a gap bridge process, namely pressing the film printed with the dot matrix into a film coating mechanism.

Preferably, the film cutting is performed in an up-cutting manner.

Preferably, the film cutting and detecting further comprise: and (4) speed adjustment, namely feeding the film after film cutting into the detection and separation mechanism at a speed higher than a first conveying speed, wherein the first conveying speed refers to the conveying speed of the film before film cutting.

Preferably, before the printing process, the dot matrix film production process further includes: unreeling, and putting the roll material of the film raw material to be printed into a material-unreeling roller.

The second aspect of the present invention further provides a dot matrix film production apparatus, which employs any one of the dot matrix film production processes described above, and the dot matrix film production apparatus includes: conveying mechanism, printing mechanism, tectorial membrane mechanism, die-cutting mechanism and detection separating mechanism.

Preferably, the printing mechanism includes: the device comprises a first drying module, a dust removal and static elimination module, a speed detection module, a dot matrix printing module and a second drying module which are sequentially arranged on the conveying mechanism.

Preferably, the film cutting mechanism comprises: a cutting die arranged on the conveying mechanism and a backing plate positioned on the cutting die.

Preferably, the detection separation mechanism includes: the CCD detection device, the signal detector, the turning plate, the finished product collection device and the defective product collection device are sequentially arranged on the conveying mechanism, the opening and closing of the turning plate is controlled through feedback signals of the signal detector, and defective products and finished products are separated and respectively placed into the defective product collection device and the finished product collection device.

In conclusion, the dot matrix film production process and the dot matrix film production equipment provided by the invention have the advantages that the dot matrix printing is carried out on the film by adopting the high-speed and accurate printing process, the printing precision of the film is improved, the film laminating and die cutting processes are simple and efficient, the production efficiency of the dot matrix film is greatly improved, the production cost is reduced, and the dot matrix film production process and the dot matrix film production equipment are easy to popularize in the market.

Drawings

FIG. 1 is a schematic flow chart of a dot matrix film production process according to a preferred embodiment of the present invention.

FIG. 2 shows a schematic structural view of a printing mechanism according to a preferred embodiment of the present invention;

FIG. 3 is a schematic structural view of a film covering mechanism according to a preferred embodiment of the present invention;

FIG. 4 is a schematic diagram showing the construction of the film cutting mechanism according to the preferred embodiment of the present invention;

FIG. 5 is a schematic view showing the structure of the separation detecting mechanism according to the preferred embodiment of the present invention;

FIG. 6 shows a front view of the spacing mechanism of the present invention;

FIG. 7 shows a side view of the spacing mechanism of the present invention;

fig. 8 shows a schematic structural view of the bridge portion of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Referring to fig. 1, the present invention provides a dot matrix film production process, including:

s1, printing a dot matrix on the surface of the film;

in practice, the following step S0 may be performed before the present step S1:

s0: unreeling, and putting the roll material of the film raw material to be printed into a material-unreeling roller.

Referring specifically to fig. 2, a roll of film stock material is placed into a feed roll 100 at one end of the transport mechanism 10 and the film moves with the transport mechanism 10 into the printing mechanism 20.

Wherein the printing process comprises:

s11, drying the surface of the film;

as shown in fig. 2, after entering the printing mechanism 20, the film is first dried by the first drying module 21. In this embodiment, the surface of the film is dried mainly by UV lamp curing.

S12, performing dust removal and static electricity removal treatment on the surface of the dried film;

as shown in fig. 2, after the film is dried, the film enters the dust-removing and static-removing module 22 along with the conveying mechanism 10 to remove dust and static on the surface of the film.

S13, detecting and adjusting the speed of the film entering the dot matrix printing module;

as shown in fig. 2, after removing dust and static electricity, the film enters the speed detection module 23, the speed v of the film entering the dot matrix printing module 24 is detected by the speed detection module 23, and the speed v is controlled within a preset speed, so that the moving speed of the film after entering the dot matrix printing module 24 is matched with the printing speed of the dot matrix printing module 24.

S14, dot matrix printing is carried out on the film;

in the invention, the dot matrix printing module 24 adopts one-time covering (Onepass) ink-jet printing, thereby improving the printing precision and shortening the plate-making period.

And S15, drying the dot matrix printed film.

As shown in fig. 2, the dot matrix print pattern on the film is dried by the second drying module 25. In this embodiment, the dot matrix printed pattern on the film is dried mainly by using a UV lamp curing method.

In a preferred embodiment, the method further comprises, between the printing process of step S1 and the laminating of step S2: and (3) a bridging process, namely pressing the film printed with the dot matrix into the film coating mechanism 30.

As shown in fig. 3, the thin film of the printed dot matrix is pressed into the laminating mechanism 30 by a bridge roller 210 that is lower than the height of the print module.

In this embodiment, a third drying module 70 may be disposed in the gap bridge mechanism, and the gap bridge process further includes the following steps: .

S151: detecting the printing density of the dot matrix film;

s152: the position of the gap bridge roller relative to the third drying module 70 is adjusted according to the printing density.

As shown in fig. 8, the present embodiment may additionally cure the dot matrix film using the third drying module 70 according to the detected print density. When the printing concentration is high, the position of the gap bridge roller is adjusted to reduce the included angle between the dot matrix film and the horizontal direction, so that the energy irradiated on the dot matrix film by the third drying module 70 is increased, and the dot matrix film can be fully cured when the printing concentration is high. When the printing concentration is low, the position of the gap bridge roller is adjusted to increase the included angle between the dot matrix film and the horizontal direction, so that the energy of the third drying module 70 irradiated on the dot matrix film is reduced, and the dot matrix film cannot be cured in a transition mode when the printing concentration is low. The present embodiment can adapt the curing energy to the print density without adjusting the curing lamp power.

The present embodiment further comprises the following steps

S153: detecting the printing density of the dot matrix film;

s154: the first conveyance speed is adjusted according to the print density.

The speed of the dot matrix film passing through the second drying module during curing is adjusted according to the detected printing density. The first conveying speed is adjusted to be small when the printing density is large so that the ink dots can be sufficiently cured, and is adjusted to be large when the printing density is small so as to avoid the ink dots from being excessively cured.

S2, coating a film, namely coating a protective film on the surface of the film printed with the dot matrix;

the original film of the protective film comprises two layers of waste film and protective film, as shown in fig. 3, the original film of the protective film is placed into a first film laminating roller 31, the waste film and the protective film are separated through two film separating rollers 32, the waste film is collected through a second film laminating roller 33, and the protective film enters a film cutting mechanism 40 along with the conveying mechanism 10.

S3, cutting the film coated with the protective film into preset size;

specifically, the film is cut according to the preset size required by a user, wherein the film cutting adopts a cutting mode. As shown in fig. 4, when the film passes through the cutting die 41 of the conveying mechanism 10 and the pad 42 on the cutting die 41, the cutting die 41 cuts the pad 42 in such a manner that the film is prevented from adhering to the pad, and the cut film is smoothly conveyed.

In a preferred embodiment, the step of cutting the film at S3 and the step of detecting at S4 further comprises: and (4) speed adjustment, namely feeding the film after film cutting into the detection and separation mechanism at a speed higher than a first conveying speed, wherein the first conveying speed refers to the conveying speed of the film before film cutting.

In the present invention, before the film enters the detection and separation mechanism 50, the film conveying speed is relatively slow, which may cause the film to be partially stacked, as shown in 510 in fig. 5, after the speed adjustment, the film after film cutting is conveyed into the detection and separation mechanism 50 at a speed greater than a first conveying speed, which refers to the conveying speed of the film before film cutting, so that the stacked film is conveyed into the detection and separation mechanism 50 at a speed greater than the first conveying speed, thereby ensuring that the film in the detection and separation mechanism 50 is not stacked, i.e. only one film in the CCD detection device 51 is detected, and ensuring the detection accuracy.

S4, detecting whether the surface of the film after film cutting is defective or not and marking the defective film;

in the invention, the production rate of the dot matrix film production process is about 13 m/min, the CCD detection device 51 is adopted in the detection step to automatically detect whether the film surface has defects, and the CDD detection device 51 can detect the film defects which are difficult to be identified by human eyes. And marking the defective film by means of ink-jet printing, i.e., jetting ink at the marking area of the defective film.

S5, separating and collecting the materials, and separating and collecting the films marked with defects and the films not marked.

As shown in fig. 5, after the film inspection, the film marked with defects is detected by a signal detector, wherein the signal detector may be a laser sensor which feeds back one signal when there is ink in the marked area and another signal when there is no ink in the marked area. And controlling the opening and closing of the turning plate 52 according to the feedback signal of the signal detector, separating defective products from finished products and respectively putting the defective products and the finished products into the defective product collecting device and the finished product collecting device. In this embodiment, a foldable flap 52 is provided in the conveying mechanism 10, a defective product collecting device is provided below the flap 52, and a finished product collecting device is provided on the conveying mechanism 10.

Further, a valve can be arranged to receive a feedback signal of the signal detector and control the opening and closing of the turning plate 52, so that the valve realizes the separation of finished products and defective products by controlling the opening and closing of the turning plate 52, when the turning plate 52 is closed, the conveying mechanism 10 is communicated, and the finished products pass through the conveying mechanism 10; when the flap 52 opens, the transfer mechanism 10 is disconnected and the defective product falls into the next product collection device below.

As shown in fig. 2 to 5, the present invention further provides a dot matrix film production apparatus, which adopts any one of the above dot matrix film production processes, and the dot matrix film production apparatus includes: a conveying mechanism 10, a printing mechanism 20, a film covering mechanism 30, a die cutting mechanism 40 and a detection separation mechanism 50.

As shown in fig. 2, the printing mechanism 20 includes: the first drying module 21, the dust removal and static elimination module 22, the speed detection module 23, the dot matrix printing module 24 and the second drying module 25 are sequentially arranged on the conveying mechanism 10.

The first drying module 21 is used for drying the surface of the film; the dust-removing static module 22 removes dust and removes static on the surface of the film; the speed v of the film entering the dot matrix printing module 24 is detected by the speed detection module 23, and the speed v is controlled within a preset speed, so that the moving speed of the film entering the dot matrix printing module 24 is ensured to be matched with the printing speed of the dot matrix printing module 24. The dot matrix printing module 24 adopts one-time covering (Onepass) ink-jet printing, so that the printing precision is improved, and the plate making period is shortened. And drying the dot matrix printing pattern on the film through a second drying module 25.

As shown in fig. 3, the film coating mechanism 30 includes: a first laminating roller 31, two film separating rollers 32 and a second laminating roller 33. Since the original film of the protective film includes two layers of the waste film and the protective film, as shown in fig. 3, the original film of the protective film is put into the first film laminating roller 31, the waste film and the protective film are separated by the two film separating rollers 32, the waste film is collected by the second film laminating roller 33, and the protective film enters the film cutting mechanism 40 along with the conveying mechanism 10.

As shown in fig. 4, the film cutting mechanism 40 includes: a cutting die 41 disposed on the conveying mechanism 10, and a backing plate 42 disposed on the cutting die 41. When the film passes through the cutting die 41 on the conveying mechanism 10 and the backing plate 42 on the cutting die 41, the cutting die 41 cuts the backing plate 42 in a manner of preventing the film from sticking to the backing plate, so that the cut film is smoothly conveyed.

As shown in fig. 5, the detection separation mechanism 50 includes: the CCD detection device 51, the signal detector, the turning plate 52, the finished product collection device and the defective product collection device are sequentially arranged on the conveying mechanism 10, the opening and closing of the turning plate 52 are controlled through feedback signals of the signal detector, and defective products and finished products are separated and respectively placed into the defective product collection device and the finished product collection device. Further, a valve can be arranged to receive a feedback signal of the signal detector and control the opening and closing of the turning plate 52, so that the valve realizes the separation of finished products and defective products by controlling the opening and closing of the turning plate 52, when the turning plate 52 is closed, the conveying mechanism 10 is communicated, and the finished products pass through the conveying mechanism 10; when the flap 52 opens, the transfer mechanism 10 is disconnected and the defective product falls into the next product collection device below.

The invention provides a dot matrix film production process with high precision, short production period and low cost. The method comprises the steps of firstly, unwinding and feeding a film material, strictly drying and removing dust, detecting and adjusting a printer through a speed, conveniently and accurately printing a film, then drying, bonding and tensioning the film with a protective film, then cutting the film into a shape, and then detecting and separating inferior-quality products and superior-quality products through a CCD. The whole process flow is simple and efficient, the precision is high, and the production cost is greatly reduced.

In a preferred embodiment, as shown in fig. 2, the dot matrix film production apparatus further comprises: and an emptying roller 110 for feeding the film stock into the transfer mechanism 10. As shown in fig. 3, a bridge roller 210 is further provided between the printing mechanism 20 and the film coating mechanism 30 for pressing the thin film of the printed dot matrix into the film coating mechanism 30. Between the film cutting mechanism 40 and the detection mechanism separation 50, further comprising: and the speed adjusting module is used for sending the film after film cutting into the detection and separation mechanism at a speed higher than a first conveying speed, wherein the first conveying speed refers to the conveying speed of the film before film cutting.

In the present invention, before the film enters the detection and separation mechanism 50, the film conveying speed is relatively slow, which may cause the film to be partially stacked, as shown in 510 in fig. 5, after the speed adjustment, the film after film cutting is conveyed into the detection and separation mechanism at a speed greater than a first conveying speed, which refers to the conveying speed of the film before film cutting, so that the stacked film is conveyed into the detection and separation mechanism 50 at a speed greater than the first conveying speed, thereby ensuring that the film in the detection and separation mechanism 50 is not stacked, i.e. only one film in the CCD detection device 51 is detected, and ensuring the detection accuracy.

As shown in fig. 6, the invention further comprises a limiting mechanism, the drying limiting mechanism comprises a plurality of groups of limiting rollers, the second drying module is a UV curing lamp, and the plurality of groups of limiting rollers are used for guiding the dot matrix film to form an inward concave arc shape below the UV curing lamp.

Spacing roller arranges according to certain relative position relation, makes the dot matrix thin loop through the arc of formation indent when these spacing rollers in the data send process, can increase the area that shines of UV curing lamp like this to improve the effect of solidification. As shown in fig. 6, the dot matrix film passes through the first, second, and third stopper rollers 61, 62, and 64 in sequence, and then forms an arc shape under the UV curing lamp. During specific implementation, the shape of the dot matrix film can be planned according to the curing process requirement, then the limiting rollers are arranged at certain positions where the dot matrix film passes according to the planned shape, and the distance between the adjacent limiting rollers can be set according to the precision requirement of the shape of the dot matrix film.

As shown in fig. 7, each set of the stopper rollers includes two pairs of stopper rollers, and the two pairs of stopper rollers are disposed on both sides of the UV curing lamp in the direction perpendicular to the dot matrix film conveying direction and outside the printing area. By adopting the arrangement mode, the conveying direction of the dot matrix film can be guided, and the light rays of the UV curing lamp irradiating the dot matrix film printing area can be ensured not to be shielded.

In a preferred embodiment, the curvature radius of the arc-shaped part of the dot matrix film is gradually reduced along the conveying direction of the dot matrix film, so that the distance from the UV curing lamp to the dot matrix film is gradually shortened in the process of passing the dot matrix film below the UV curing lamp, and the energy of the UV curing lamp irradiating the dot matrix film is increased. The ink on the dot matrix film has proper fluidity and can be continuously leveled because the curing energy is small when the ink is just cured. The ink is gradually leveled along with the forward conveying of the dot film, and the energy of the UV curing lamp irradiating the dot array film is larger and larger, so that the ink after being fully leveled is completely cured, and the curing effect is improved under the condition of not changing the power of the curing lamp.

In this embodiment, a fourth curing module is further provided, the fourth curing module is located on the opposite side of the dot matrix film from the printing module, and the fourth curing module and the second drying module are sequentially arranged along the conveying direction of the printing medium. The fourth curing module can adopt a UV curing lamp, partial ink drops in contact with the film are cured firstly after the light of the UV curing lamp penetrates through the film, so that the ink drops can be fixed on the film, the ink drops are not directly in contact with the film and can be fully leveled nearby, and the ink drops are fully cured after being dried by the second drying module after being fully leveled.

In order to further improve the curing effect, the irradiation part 251 of the UV curing lamp may be formed in an arc shape so that the area of the dot matrix film irradiated by the UV curing lamp is also larger, thereby shortening the curing time under the same condition.

It should be noted that the circles not labeled in fig. 2 to 8 are rollers for changing the conveying direction of the conveying mechanism 10 or rollers for flattening the film, and those skilled in the art can easily understand the rollers and the applications represented by the circles in the labels of fig. 2 to 8, and the description thereof is omitted here.

In conclusion, the dot matrix film production process and the dot matrix film production equipment provided by the invention have the advantages that the dot matrix printing is carried out on the film by adopting the high-speed and accurate printing process, the printing precision of the film is improved, the film laminating and die cutting processes are simple and efficient, the production efficiency of the dot matrix film is greatly improved, the production cost is reduced, and the dot matrix film production process and the dot matrix film production equipment are easy to popularize in the market.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.