CN116476416B

CN116476416B - EVA adhesive film extrusion production line and control method thereof

Info

Publication number: CN116476416B
Application number: CN202310293844.9A
Authority: CN
Inventors: 李泽群; 马炎力; 张景波; 腾丹丹; 庄勇勤
Original assignee: QINGDAO XINDACHENG PLASTIC MACHINERY CO Ltd
Current assignee: QINGDAO XINDACHENG PLASTIC MACHINERY CO Ltd
Priority date: 2022-12-17
Filing date: 2023-03-24
Publication date: 2024-05-31
Anticipated expiration: 2043-03-24
Also published as: CN220052780U; CN116476416A

Abstract

The invention discloses an EVA adhesive film extrusion production line and a control method thereof. The EVA adhesive film extrusion production line comprises an extruder, a tape casting forming machine and a winding machine which are sequentially arranged, wherein a die head for extruding a film is arranged on the extruder, and the tape casting forming machine comprises a tape casting forming roller set and a cooling shaping roller set; the EVA adhesive film extrusion production line also comprises a tempering heating device and a track setting machine; the tempering heating device comprises a mounting bracket, a heating box assembly and a mesh belt conveying assembly; the crawler shaping machine comprises a plurality of heat conduction components which move circularly, the outer surface of the heat conduction component forms a heat conduction surface for supporting the membrane, and the crawler shaping machine is arranged between the forming roller and the winding machine. The EVA adhesive film extrusion production line can reduce the influence of stress on the film so as to improve the production quality.

Description

EVA adhesive film extrusion production line and control method thereof

Technical Field

The invention relates to the technical field of machinery, in particular to an EVA adhesive film extrusion production line and a control method thereof.

Background

The plastic product has the advantages of light weight, good electrical insulation performance, wide mechanical light range, good heat insulation performance, excellent processing performance and excellent chemical corrosion resistance, and is applied to the fields of automobiles, household appliances, agriculture, medicine, various packages, national defense, aerospace and the like from the beginning of the 20 th century. With the continuous development of solar power generation technology, solar power generation panels are widely used in production, and solar cell packaging adhesive films (EVA adhesive films) are used for being placed in the middle of laminated glass and are important materials in the processing process of the solar power generation panels. The solar EVA adhesive film is usually formed by casting an extruder, and as disclosed in Chinese patent publication No. CN 202359060U, the solar EVA adhesive film production line comprises an extruder, a die head, a casting forming device, a cooling shaping device, a slitting and winding device and a film unloading table. In the actual production process, the raw materials are heated and melted to be chilled into slices, internal stress is easy to generate in the production process, and partial stress can be released through the cooling shaping device, but new stress can be generated due to the tensile force influence of the EVA adhesive film in the conveying and rolling processes. After the EVA adhesive film is stored for a long time, folds can be formed on the surface due to the influence of internal stress, so that the waste of the film material is caused. In view of this, how to design a technology for reducing stress influence to improve the production quality of EVA film is a technical problem to be solved by the present invention.

Disclosure of Invention

The invention provides an EVA film extrusion production line and a control method thereof, which can reduce the influence of stress on a film so as to improve the production quality.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the invention provides an EVA adhesive film extrusion production line, which comprises an extruder, a tape casting forming machine and a winding machine which are sequentially arranged, wherein a die head for extruding a film is arranged on the extruder, and the tape casting forming machine comprises a tape casting forming roller set and a cooling shaping roller set;

The EVA adhesive film extrusion production line also comprises a tempering heating device and a track setting machine;

The tempering heating device comprises a mounting bracket, a heating box assembly and a net belt conveying assembly, wherein the heating box assembly comprises a box body and a plurality of quartz heating pipes, a tempering heating cavity is formed in the box body and is arranged on the mounting bracket, and the quartz heating pipes are arranged in the tempering heating cavity side by side; the net belt conveying assembly comprises a first driving motor, a conveying net belt and two belt rollers, wherein the conveying net belt is wound on the two belt rollers, the first driving motor is in transmission connection with one of the belt rollers, the two belt rollers are respectively and rotatably arranged at the corresponding end parts of the mounting bracket, and the conveying net belt penetrates through the tempering heating cavity;

The crawler shaping machine comprises a plurality of heat conducting components which move circularly, the outer surface of the heat conducting components forms a heat conducting surface for supporting the membrane, and the crawler shaping machine is arranged between the forming roller and the winding machine;

The tempering heating device is positioned between the casting forming roller set and the cooling shaping roller set, and the track shaping machine is arranged between the cooling shaping roller set and the winding machine.

Further, the box body comprises an upper cover shell and a lower cover shell, a plurality of quartz heating pipes which are arranged side by side are respectively arranged in the upper cover shell and the lower cover shell, the upper cover shell and the lower cover shell are respectively arranged on the mounting bracket, the upper cover shell is positioned above the lower cover shell, a space is formed between the end part of the upper cover shell and the end part of the lower cover shell, and a belt body positioned on the upper part penetrates through the space and is positioned between the upper cover shell and the lower cover shell.

Further, at least one supporting roller is further arranged on the lower housing, the supporting roller is rotatably arranged on the lower housing, and the conveying mesh belt abuts against the supporting roller.

Further, the crawler shaping machine further comprises a supporting frame, two chain wheel shafts, two conveying chains and a second driving motor, wherein chain wheels are respectively arranged at two ends of the chain wheel shafts, one of the chain wheel shafts is rotatably arranged at one end of the supporting frame, the other chain wheel shaft is rotatably arranged at the other end of the supporting frame, the second driving motor is in transmission connection with one of the chain wheel shafts, the conveying chains are wound on the two chain wheels at corresponding sides, and a plurality of heat conducting components are arranged between the two conveying chains.

Further, the heat conducting surface is also provided with a plurality of through holes.

Further, the tempering device also comprises a thickness gauge and a controller, wherein the thickness gauge is arranged behind the tempering heating device;

the die head comprises:

The die head comprises a die head main body, wherein two die lips are arranged oppositely, a forming groove is formed between the two die lips, a plurality of threaded holes are arranged side by side on the die head main body, an adjusting rod is connected in the threaded holes in a threaded manner, one end of the adjusting rod is connected with one of the die lips and can rotate relative to the die lips, and the other end of the adjusting rod is positioned outside the die head main body and is provided with a driving connecting part;

The automatic adjusting mechanism comprises a traversing mechanism, a rotating component and a driving component, wherein the traversing mechanism is arranged on one side of the die head main body, the traversing mechanism is provided with a traversing part, the traversing part can reciprocate along the length direction of the forming groove, the rotating component is rotatably arranged on the traversing part, the driving component is configured to drive the rotating component to rotate, and the rotating component is provided with a driving matching part for being connected with the driving connecting part in a matching way;

Wherein the die body is mounted on the extruder, and the controller is configured to control the automatic regulating assembly to act according to the thickness of the film sheet output from the casting roll group measured by the thickness gauge.

Further, the traversing mechanism comprises a mounting frame, a guide rail, a screw rod, a moving seat and a first servo motor, wherein the guide rail and the screw rod are arranged on the mounting frame side by side, the first servo motor is configured to drive the screw rod to rotate on the mounting frame, the moving seat is slidably arranged on the guide rail, a threaded hole is formed in the moving seat, and the screw rod is in threaded connection with the threaded hole;

the mounting frame is arranged on the die head main body, and the movable seat is the transverse moving part.

The invention also provides a control method of the EVA adhesive film extrusion production line, which comprises the following steps: the film output by the die head enters a casting forming roller group for casting forming, the film subjected to casting forming treatment enters a tempering heating device and is carried by a conveying net, and in the tempering heating process of the film in the tempering heating device, the conveying speed of the conveying net is matched with the film output by the casting forming roller group; the film sheet output from the tempering heating device enters a cooling shaping roller set for cooling shaping and then is conveyed to a track shaping machine; the heat-conducting components of the crawler shaping machine bear the membrane for conveying and naturally cooling, and the moving speed of the membrane along with the heat-conducting components is matched with the membrane output by the cooling shaping roller set; and finally, the membrane conveyed on the crawler shaping machine is rolled and processed by a rolling machine.

Further, the control method further comprises the step that the thickness gauge detects the thickness of the passing diaphragm to obtain the thickness information of the diaphragm output by the die head main body, and the controller controls the transverse moving mechanism to drive the rotating part to move to the corresponding adjusting rod to be adjusted according to the thickness information fed back by the thickness gauge, and the controller controls the rotating part to drive the adjusting rod to rotate by a set angle.

Further, the control method comprises an initialization mode and an online adjustment mode;

Under the initialization executing mode, the traversing mechanism drives the rotating parts to sequentially move to each adjusting rod and drives the adjusting rods to rotate through the rotating parts, and the controller records the initial rotating angle of the rotating part at each adjusting rod;

In an on-line adjusting mode, the controller controls the traversing mechanism to drive the rotating part to move to an adjusting rod to be adjusted according to thickness information of the diaphragm fed back by the thickness gauge; the controller firstly controls the rotating part to rotate to the initial rotating angle corresponding to the adjusting rod according to the recorded initial rotating angle of the rotating part corresponding to the adjusting rod; then, the driving matching part is connected with the driving connecting part, and the controller controls the rotating part to rotate and updates the current angle of the rotating part to the initial rotating angle of the rotating part at the adjusting rod.

Compared with the prior art, the technical scheme of the invention has the following technical effects: by arranging the tempering heating device and the caterpillar band shaping machine, the tempering heating device can perform tempering heating on the membrane after the casting shaping treatment is performed on the membrane by the casting shaping roller set so as to effectively eliminate residual stress in the membrane material, and the membrane is carried and conveyed by the conveying net, so that surface wrinkles of the membrane cannot occur due to the fact that the membrane is pulled and stressed in the tempering process, and further, the condition that the membrane is deformed due to the internal stress of the membrane is solved by cooling shaping after the internal stress of the membrane is completely released by the cooling shaping roller set; in addition, the crawler shaping machine carries and conveys the cooled and shaped membrane through the movable heat conducting component, and the waste heat of the membrane is conducted to the heat conducting component to accelerate the natural cooling speed, and likewise, the heat conducting component can avoid generating new stress inside due to the fact that the membrane is pulled and stressed in the membrane conveying process, so that the membrane after the stress release is completely shaped can be ensured to be rolled in a stable and flatter mode, the rate of finished products of membrane materials is improved, and the production quality of EVA adhesive films is improved.

In addition, the distance between the two die lips is adjusted by adding the automatic adjusting component, the traversing mechanism configured by the automatic adjusting component can drive the rotating component to move to the adjusting screw rod at the designated position along the length direction of the die lips, the driving matching part configured on the rotating component can be connected with the driving connecting part on the adjusting rod in a matched manner, and then the driving component is used for driving the rotating component to rotate by a set angle value, so that the distance between the corresponding parts of the two die lips is adjusted, the thickness of the diaphragm is automatically adjusted on line, the thickness of the diaphragm is automatically adjusted, and the product quality is improved.

Drawings

FIG. 1 is a schematic diagram of an EVA film extrusion line;

FIG. 2 is one of the schematic structural diagrams of the die of FIG. 1;

FIG. 3 is a second schematic diagram of the die of the present invention;

FIG. 4 is a cross-sectional view of a die of the present invention;

FIG. 5 is an enlarged partial schematic view of area A of FIG. 4;

FIG. 6 is a schematic view of the structure of the automatic adjusting assembly in the die head of the present invention;

FIG. 7 is a schematic view of the tempering heating apparatus shown in FIG. 1;

FIG. 8 is a schematic view of a portion of the heating cabinet assembly of FIG. 7;

FIG. 9 is an assembly view of the web transport assembly and the deskewing module of FIG. 7;

FIG. 10 is an enlarged partial schematic view of region I of FIG. 9;

FIG. 11 is a schematic view of the airflow assembly of FIG. 7;

FIG. 12 is a schematic view of the track-setting machine of FIG. 1;

fig. 13 is an enlarged partial schematic view of the region M in fig. 12.

Reference numerals:

extruder 100, die head 200, casting machine 300, thickness gauge 400, and winder 500;

a die body 1;

Die lip 11, adjusting lever 12;

A drive connection section 121;

An automatic adjustment assembly 2;

a traversing mechanism 21, a rotating member 22, and a driving member 23;

The device comprises a mounting frame 211, a guide rail 212, a screw rod 213, a movable seat 214 and a first servo motor 215;

A drive engagement portion 221, a rotation shaft 222, a transmission case 223, and a telescopic drive member 224;

a casting forming roller set 301 and a cooling shaping roller set 302;

tempering heating apparatus 600;

The device comprises a mounting bracket 610, a heating box assembly 620, a mesh belt conveying assembly 630, an airflow assembly 640 and a deviation correcting module 650;

An upper case 621, a lower case 622, a quartz heating pipe 623, and a support roller 624;

the first driving motor 631, the conveying net belt 632, the belt roller 633, the fan 641, the air duct 642, the deviation correcting roller 651, the deviation correcting cylinder 652 and the sliding shaft seat 653;

track setting machine 700;

the heat conduction component 710, the sprocket shaft 720, the conveying chain 730, the second driving motor 740, the supporting frame 750 and the tensioning module 760;

sprocket 721, adjusting bracket 761, adjusting seat 762, adjusting screw 763.

Description of the embodiments

In a first embodiment, as shown in fig. 1 to 11, the present embodiment provides an EVA film extrusion line, which includes an extruder 100, a die 200, a casting machine 300, a thickness gauge 400, a winder 500, and a controller. The controller is used for controlling the operation of the extruder 100, the die head 200, the casting forming machine 300, the thickness gauge 400, the winding machine 500 and other related components, and regarding the specific structural form of the EVA film extrusion production line, reference may be made to structural configurations in the conventional technology, such as chinese patent publication nos. CN 215359500U and CN202491398U, CN203888108U.

In some embodiments, the film sheet extruded from the die 200 is easily stressed inside after being cooled and molded by the casting machine 300, thereby causing wrinkles in the final film sheet product to deteriorate the product quality. In order to effectively eliminate the stress in the membrane, the quality of the product is improved. The casting molding machine 300 in the EVA film extrusion line of the present embodiment includes a casting molding roller set 301 and a cooling shaping roller set 302, and the EVA film extrusion line further includes a tempering heating apparatus 600 and a track shaping machine 700.

The specific structural forms and installation positions of the tempering heating apparatus 600 and the track setter 700 are described below with reference to the accompanying drawings.

As shown in fig. 7-11, the tempering heating apparatus 600 includes a mounting bracket 610, a heating box assembly 620, and a mesh belt conveyor assembly 630; the heating box assembly 620 includes a box body, in which a tempering heating chamber is formed and provided on the mounting bracket, and a plurality of quartz heating pipes 623, in which the plurality of quartz heating pipes are provided side by side. The mesh belt conveying assembly 630 includes a first driving motor 631, a conveying mesh belt 632, and two belt rollers 633, the conveying mesh belt 632 being wound around the two belt rollers 633, the first driving motor 631 being drivingly connected thereto with the belt rollers 633, the two belt rollers 633 being rotatably mounted at respective ends of the mounting bracket 610, a portion of the conveying mesh belt 632 extending through the space and being located between the upper casing 621 and the lower casing 622.

Specifically, in the actual use, the film fed out from the die 200 is first fed into the casting roll set 301 to be cooled and formed, and the film fed out from the casting roll set 301 is internally stressed by being cooled.

The membrane will follow the conveying mesh belt 632 to convey and enter into the tempering heating cavity formed between the upper cover shell 621 and the lower cover shell 622, and as the membrane adopts the conveying mesh belt 632 to carry out bearing conveying, on one hand, the membrane can be effectively supported by the conveying mesh belt 632 so as to reduce the stress deformation of the membrane during heating due to vertical distribution, and on the other hand, the speed of the conveying mesh belt 632 is controlled so that the moving speed of the conveying mesh belt 632 is basically the same as the speed of the membrane output from the tape casting forming roller set 301, thus the deformation of the membrane due to traction stress during tempering heating can be effectively avoided, and the integral quality of the membrane is more beneficial to improvement.

The box body comprises an upper cover shell 621 and a lower cover shell 622, wherein a plurality of quartz heating pipes 623 are respectively arranged in the upper cover shell 621 and the lower cover shell 622 side by side, the upper cover shell 621 and the lower cover shell 622 are respectively arranged on the mounting bracket 610, the upper cover shell 621 is positioned above the lower cover shell 622, and a space is formed between the end part of the upper cover shell 621 and the end part of the lower cover shell 622; the conveyor belt 632 is positioned at the upper belt body through-space and between the upper casing 621 and the lower casing 622. The film will follow the conveyor belt 632 and enter the tempering heating chamber formed between the upper casing 621 and the lower casing 622.

The diaphragm moves along with the conveyor mesh belt 632 in the tempering heating chamber, and the quartz heating pipe 623 is electrified to generate heat for heating and tempering the diaphragm, so as to eliminate the stress in the diaphragm. And the film sheet output from the heating box assembly 620 enters the cooling shaping roller set 302 for cooling for one-step shaping treatment, so that the stress influence in the film sheet can be effectively reduced.

The diaphragm is subjected to cooling forming treatment by adopting the two cooling forming machines, the heating box assembly arranged between the two cooling forming machines can carry out tempering heating treatment on the diaphragm subjected to primary cooling forming so as to eliminate stress in the diaphragm, and after tempering heating treatment, the diaphragm is subjected to secondary cooling forming by the cooling forming machines, so that the influence of the influence on the product quality caused by the internal influence of the diaphragm is finally lightened, the occurrence of wrinkles on the diaphragm is reduced, and the processing quality of the diaphragm is further improved.

Further, tempering heating apparatus 600 also includes an air flow assembly 640; the airflow assembly 640 includes a fan 641 and a duct 642, the fan 641 being configured to deliver airflow into the duct 642, an air inlet (not shown) being provided on the upper housing 621, the duct 642 being connected to the air inlet.

Specifically, in order to improve the uniformity of heating the membrane between the upper casing 621 and the lower casing 622, an air flow is delivered through the air flow assembly 640 into the tempering heating chamber formed between the upper casing 621 and the lower casing 622, so as to ensure uniform temperature distribution in the tempering heating chamber, thereby better tempering heating treatment of the membrane.

Further, a plurality of elevating mechanisms (not shown) are provided on the mounting bracket 610, the elevating mechanisms being disposed at four corners of the mounting bracket 610, and the upper cover 621 being provided on the elevating portions of the elevating mechanisms.

Specifically, in order to facilitate the operator to pass the membrane between the upper casing 621 and the lower casing 622 at the initial stage of production, a lifting mechanism is provided at four corners of the mounting bracket 610, and the lifting mechanism can lift the upper casing 621 open at the initial stage, so that a space between the upper casing 621 and the lower casing 622 is large enough for the operator to pull the head of the membrane to pass.

Still further, at least one support roller 624 is further disposed on the lower casing 622, the support roller 624 is rotatably disposed on the lower casing 622, and the conveyor belt 632 abuts against the support roller 624.

Specifically, in order to ensure that the conveying mesh belt 632 can stably drive the membrane to move in the tempering heating cavity, the influence on the quality of the membrane due to excessive gravity sinking of the conveying mesh belt 632 is avoided. A support roller 624 is disposed on the lower case 622 and the conveyor belt 632 is supported by the support roller 624.

Still further, the tempering heating apparatus 600 further includes a deviation rectifying module 650, where the deviation rectifying module includes a deviation rectifying roller 651, a deviation rectifying cylinder 652, a sliding shaft seat 653 and two photoelectric sensors (not labeled), one end of the deviation rectifying roller 651 is rotatably disposed on the mounting bracket 610, the other end of the deviation rectifying roller 651 is rotatably disposed on the sliding shaft seat 653, the sliding shaft seat 653 is slidably disposed on the mounting bracket 610 along the length direction of the mounting bracket 610, the deviation rectifying cylinder 652 is configured to drive the sliding shaft seat 653 to slide, the photoelectric sensors are disposed at one end of the mounting bracket 610, the conveying mesh belt 632 is disposed between the two photoelectric sensors and is abutted against the deviation rectifying roller 651, and the deviation rectifying module 650 is located below the lower housing 622.

Specifically, during actual use, since the conveyor belt 632 is in a tight state during operation, the conveyor belt 632 is prone to deviation during use. At this time, one of the photoelectric sensors located at two sides of the conveying mesh belt 632 can detect the deviation thereof, and trigger the deviation correcting cylinder 652 to stretch to drive the sliding shaft seat 653 to move, so as to adjust the inclination angle of the deviation correcting roller 651, so as to correct and adjust the conveying mesh belt 632.

In another embodiment, since the film extruded from the die 200 is cooled and formed by the casting forming machine 300, the film is cooled by natural cooling in the direction of the rolling machine 500, and the conventional technology usually adopts a tractor to pull the film forward, but the film is easily stretched and deformed in the process of being pulled by the tractor, so that the heat dissipation efficiency of the film in contact with air is low, and the processing quality of the film is reduced.

As shown in fig. 12 to 13, the track setter 700 is disposed between the casting machine 300300 and the winder 500. The track-setting machine 700 includes a plurality of cyclically movable heat-conducting members 710, the outer surfaces of the heat-conducting members 710 forming a heat-conducting surface for supporting the membrane.

Specifically, in the actual use process, after the extrusion material is extruded from the die head 200, the extrusion material is processed by the tape casting machine 300 and the tempering heating device 600 to form a film, the film is finally conveyed to the track shaping machine 700, and the film is supported by the heat conducting surface of the heat conducting component 710 and moves towards the winder 500 along with the heat conducting component 710.

In the process of following the movement of the heat conducting component 710, on one hand, the heat conducting component 710 can effectively support the diaphragm, the diaphragm is supported by the heat conducting component 710 at the bottom and cannot be stretched and deformed due to gravity, and on the other hand, the heat conducting component 710 is generally made of a material with good heat conducting performance (such as metal materials of aluminum, steel and the like), so that the diaphragm can conduct heat with the heat conducting component 710 rapidly. In the process that the diaphragm follows the heat conducting component 710 to move, the diaphragm can release heat to the air, and can quickly conduct the heat to the heat conducting component 710, so that the heat conducting component 710 is utilized to assist in quick heat dissipation.

In the actual use process, the moving speed of the heat conducting component 710 can be matched with the speed of outputting the film by the cooling shaping roller set 302 in the casting molding machine 300, so that the film can be placed on the heat conducting component in a natural state and move along with the heat conducting component, and the tensile force of the film is reduced.

The diaphragm traction conveying is assisted through the crawler setting machine, the heat conduction part in the crawler setting machine can effectively support the diaphragm to lighten the influence caused by the gravity pull rope, and the heat conduction part has excellent heat conduction and heat dissipation performance, can rapidly absorb the heat of the diaphragm, so as to assist the heat dissipation of the diaphragm, and further improve the processing quality of the diaphragm.

Further, the track setting machine 700 includes a supporting frame 750, two sprocket shafts 720, two conveying chains 730 and a second driving motor 740, wherein the two ends of the sprocket shafts 720 are respectively provided with a sprocket 721, one of the sprocket shafts 720 is rotatably arranged at one end of the supporting frame 750, the other sprocket shaft 720 is rotatably arranged at the other end of the supporting frame 750, the second driving motor 740 is in transmission connection with one of the sprocket shafts 720, the conveying chains 730 are wound on the two sprockets 721 at the corresponding sides, and a plurality of heat conducting components 710 are arranged between the two conveying chains 730.

Specifically, the support frame 750 is provided at both ends thereof with sprocket shafts 720, respectively, and both sprocket shafts 720 mount the chain through sprockets 721 disposed thereon. And the heat conductive member 710 is mounted on both of the chains. In use, the second driving motor 740 drives the sprocket shaft 720 to rotate, so that the two chains rotate in a synchronous and circulating manner, thereby driving each heat conducting component 710 to rotate in a circulating manner.

Among them, for the heat conductive member 710, its representation entity may have various structural forms.

For example: the heat conducting member 710 has a plate-like structure, and flange structures are respectively provided at both side edges of the heat conducting member 710, and inner flanges are provided at edges of the flange structures, and are fixed on the conveyor chain 730 by bolts. The plate-like structure of the heat-conducting member 710 can have a sufficiently large heat-conducting surface to contact and support the membrane, while the flange structure provides an inner flange that can be well fixedly connected to the chain.

Or the heat conductive member 710 has a square tube structure. Specifically, the heat conducting component 710 of square tube structure generally has a sufficiently large heat conducting surface to contact with and support the membrane, and the heat conducting component 710 of square tube structure can be firmly and reliably fixed between the two chains by bolts.

Specifically, the through holes can also assist in ventilation and heat dissipation at the bottom of the diaphragm.

Still further, a second drive motor 740 is disposed at an end of the support frame 750 and is in driving connection with the adjacent sprocket shaft 720. The track setting machine 700 further includes a tensioning module 760, wherein the tensioning module 760 includes an adjusting bracket 761, an adjusting seat 762 and an adjusting screw 763, the adjusting bracket 761 is disposed at the other end of the supporting frame 750, the adjusting seat 762 is slidably disposed on the adjusting bracket 761, the adjusting screw 763 is rotatably disposed on the adjusting bracket 761 and is screwed on the adjusting seat 762, and the sprocket shaft 720 disposed at the other end of the supporting frame 750 is rotatably disposed on the adjusting seat 762.

Specifically, during use, the chain tends to loosen over time, and for this purpose, the adjustment screw 763 may be turned to move the adjustment seat 762 outward on the adjustment bracket 761 so that the chain is always in tension.

In summary, it can be known that, by setting the tempering heating device and the track shaping machine, the tempering heating device can perform tempering heating on the membrane after the casting shaping roller set performs casting shaping treatment on the membrane, so as to effectively eliminate residual stress in the membrane material, and the membrane is carried and conveyed by the conveying net, so that surface wrinkles of the membrane cannot occur due to the fact that the membrane is pulled and stressed in the tempering process, and further, the condition that the membrane is deformed due to the internal stress of the membrane is solved by cooling shaping after the internal stress of the membrane is completely released through the cooling shaping roller set; in addition, the crawler shaping machine carries and conveys the cooled and shaped membrane through the movable heat conducting component, and the waste heat of the membrane is conducted to the heat conducting component to accelerate the natural cooling speed, and likewise, the heat conducting component can avoid generating new stress inside due to the fact that the membrane is pulled and stressed in the membrane conveying process, so that the membrane after the stress release is completely shaped can be ensured to be rolled in a stable and flatter mode, the rate of finished products of membrane materials is improved, and the production quality of EVA adhesive films is improved.

In the second embodiment, as shown in fig. 2 to 6, in order to automatically control and adjust the thickness of the film outputted from the die 200 according to the thickness gauge 400, the controller controls the automatic adjusting component in the die 200 according to the thickness of the film outputted from the die body 1 measured by the thickness gauge 400. The following structural design is made for the die 200.

Die 200 includes:

the die head comprises a die head body 1, wherein two die lips 11 which are oppositely arranged are arranged on the die head body 1, a forming groove is formed between the two die lips 11, a plurality of threaded holes which are arranged side by side are also arranged on the die head body 1, an adjusting rod 12 is connected in a threaded manner in the threaded holes, one end of the adjusting rod 12 is connected with one of the die lips 11 and can rotate relative to the die lips 11, and the other end of the adjusting rod 12 is positioned outside the die head body 1 and is provided with a driving connecting part 121;

The automatic adjusting mechanism 2 comprises a traversing mechanism 21, a rotating component 22 and a driving component 23, wherein the traversing mechanism 21 is arranged on one side of the die head main body 1, the traversing mechanism 21 is provided with a traversing part which can reciprocate along the length direction of the forming groove, the rotating component 22 is rotatably arranged on the traversing part, the driving component 23 is configured to drive the rotating component 22 to rotate, and the rotating component 22 is provided with a driving matching part 221 for matching and connecting with the driving connecting part 121.

Specifically, the die 200 in this embodiment employs the die body 1 to mold the material extruded from the extruder, and finally, the material is discharged from the molding groove formed between the two die lips to obtain a desired film product. Regarding the specific structure of the die body 1 in which two die lips 11 are provided for extrusion to form a film, reference may be made to a conventional film processing die structure, and details and limitations are not given herein.

In the actual production process, the thickness gauge 400 can detect the thickness of the produced film on line and feed back the thickness information to the controller, and the controller can correspondingly control the automatic adjusting component in the die head 200 to automatically adjust according to the thickness information fed back by the thickness gauge 400.

Wherein the thickness gauge 400 is disposed between the extruder 100 and the winder 500 and behind the tempering heater 600, and further performs thickness measurement before the film is wound.

In the use, because of the influence of factors such as material distribution uniformity, the thickness of the membrane that appears processing along the length direction of die lip 11 has the difference easily, and at this moment, the thickness value of membrane different positions department can be detected to the thickness gauge. The corresponding parts of the die lips can be adjusted by the adjusting rods 12 arranged side by side on the die head main body 1, and then the distance between the corresponding parts of the two die lips is adjusted by the adjusting rods 12 in the length direction of the die lips, so that the thickness of the corresponding parts of the diaphragm is adjusted.

In order to meet the requirement of automatic adjustment in the process of adjusting the distance between the two die lips 11, the material deterioration caused by temperature rise is avoided. A self-adjusting assembly 2 is additionally added to the die body 1.

The traversing mechanism 21 of the automatic adjusting assembly 2 can drive the rotating member 22 to move to the adjusting screw 763 of the specified position along the length direction of the die lip 11. The driving matching part 221 arranged on the rotating part 22 can be matched and connected with the driving connecting part 121 on the adjusting rod 12, and then the driving part 23 drives the rotating part 22 to rotate by a set angle value so as to adjust the distance between the corresponding positions of the two die lips 11, thereby achieving the purpose of automatically adjusting the thickness of the membrane on line.

The distance between the corresponding positions of the two die lips 11 is adjusted through mechanical rotation, so that on one hand, on-line automatic adjustment is realized, and on the other hand, material deterioration caused by the adoption of a temperature-sensing telescopic adjusting nut heating mode can be avoided, and further the quality of a membrane product is improved.

In actual use, according to the thickness information of the diaphragm fed back by the thickness gauge, when specific parameters are adjusted, the angle value of the adjusting rod 12 required to rotate in the adjusting process is correspondingly calculated according to the specific pitch of the adjusting rod 12. The specific calculation method is to obtain the rotation angle value of the adjusting rod 12 according to the thickness difference value of the diaphragm to be adjusted and the pitch value of the adjusting rod 12, which is not described and limited herein.

In some embodiments, the driving connection portion 121 and the driving engagement portion 221 may have various structures, which are illustrated below.

In one embodiment, the driving connection portion 121 is a first polygonal connector provided at an end of the adjustment lever 12, and the driving engagement portion 221 is a first polygonal groove provided at a head position of the rotation member 22. Specifically, when the rotating member 22 moves to the corresponding adjusting lever 12, the driving connection portion 121 is connected to the driving matching portion 221, and at this time, the first polygonal connector is inserted into the first polygonal groove, so as to enable the rotating member 22 to drive the adjusting lever 12 to rotate.

In the second embodiment, the driving connection portion 121 is a second polygonal groove provided at an end of the adjustment lever 12, and the driving engagement portion 221 is a second polygonal connector provided at a head position of the rotating member 22. Specifically, when the rotating member 22 moves to the corresponding adjusting lever 12, the driving connection portion 121 is connected to the driving matching portion 221, and at this time, the second polygonal connector is inserted into the second polygonal groove, so as to enable the rotating member 22 to drive the adjusting lever 12 to rotate.

For the first and second modes, in order to ensure that the polygonal connector can be accurately inserted into the polygonal groove, the polygonal groove forms a horn mouth structure, and the polygonal connector is guided by the horn mouth structure so as to ensure that the polygonal connector can be smoothly and accurately inserted into the polygonal groove.

In a third mode, the driving connection portion 121 is a first end toothed disc disposed on an end portion of the adjustment lever 12, and the driving engagement portion 221 is a second end toothed disc disposed at a head portion of the rotating member 22. Specifically, when the rotating member 22 moves to the corresponding adjusting lever 12, the driving connection portion 121 is connected to the driving matching portion 221, and at this time, the first end gear disc is meshed with the second end gear disc, so that the rotating member 22 drives the adjusting lever 12 to rotate.

In another embodiment, the threaded holes are respectively arranged on the two opposite sides of the die body 1, and the adjusting rods 12 positioned on the same side of the die body 1 are connected with the adjacent die lips 11.

Specifically, a plurality of corresponding adjusting rods 12 may be disposed on the die body 1 for each die lip 11, and two automatic adjusting assemblies 2 are disposed on the die body 1 correspondingly, where the automatic adjusting assemblies 2 adjust the screws on one side of the corresponding die lip 11, so as to increase the distance range between the two die lips 11.

In some embodiments, the traversing mechanism 21 includes a mounting frame 211, a guide rail 212, a screw rod 213, a moving seat 214, and a first servo motor 215, where the guide rail 212 and the screw rod 213 are arranged side by side on the mounting frame 211, the first servo motor 215 is configured to drive the screw rod 213 to rotate on the mounting frame 211, the moving seat 214 is slidably disposed on the guide rail 212, a threaded hole is disposed on the moving seat 214, and the screw rod 213 is screwed in the threaded hole; wherein, the mounting frame 211 is disposed on the die body 1, and the moving seat 214 is the traverse part.

Specifically, in order to accurately control the moving position of the rotating member 22, the moving seat 214 is driven to move by using a screw rod 213 driving manner, and the rotating member 22 is driven to accurately move to the position of the adjusting rod 12 at the corresponding position by the moving seat 214.

In other embodiments, the rotating member 22 includes a rotating shaft 222 and a transmission case 223, a power input part (not labeled) is disposed on the transmission case 223, the rotating shaft 222 is rotatably disposed on the transmission case 223, the power input part is in transmission connection with the rotating shaft 222, and a driving mating part 221 is disposed at one end of the rotating shaft 222.

Specifically, the rotating member 22 is connected to the driving member 23 via a transmission case 223, and the power output from the driving member 23 is transmitted to a power input unit, which transmits power to the rotating shaft 222 to drive the rotating shaft 222 to rotate. Regarding the specific structure of the transmission case 223, reference may be made to a transmission device in the conventional art, and no limitation is made herein. In addition, the relevant driving part may be a second servo motor to precisely control the rotation angle of the rotation shaft 222.

Further, the rotation shaft 222 is provided to be adjacent to and connected with the adjustment lever 12 after the rotation member 22 is moved to the position of the adjustment lever 12 for convenience. The rotation part 22 further includes a telescopic driving part 224, the telescopic driving part 224 is disposed on the transmission case 223, and a telescopic moving part is disposed on the telescopic driving part 224; the rotation shaft 222 is also reciprocally slidable along the axis of the rotation shaft 222 with respect to the transmission case 223, and the telescopic moving part is connected to the rotation shaft 222 and configured to drive the rotation shaft 222 to reciprocally move.

Specifically, after the rotating member 22 moves to the position of the adjustment lever 12, the telescopic driving member 224 drives the rotation shaft 222 to move toward the direction of the adjustment lever 12, so that the driving engagement portion 221 is connected with the driving connection portion 121. And, after the adjustment operation of the adjustment lever 12 is completed, the telescopic driving part 224 drives the rotation shaft 222 to retract so that the driving engagement part 221 is separated from the driving connection part 121. In order to meet the requirements of rotation of the rotating shaft 222 and sliding of the rotating shaft 222, for this purpose, a gear tooth structure 2221 is provided on the outer circumference of the rotating shaft 222, and the gear tooth structure 2221 can be meshed with the gear teeth in the transmission case 223 to meet the transmission requirement.

In a third embodiment, the present invention further provides a control method for an EVA film extrusion line, where the EVA film extrusion line adopts the EVA film extrusion line in the first embodiment. The specific control method comprises the following steps:

The film output by the die head enters a casting forming roller group for casting forming, the film subjected to casting forming treatment enters a tempering heating device and is carried by a conveying net, and in the tempering heating process of the film in the tempering heating device, the conveying speed of the conveying net is matched with the film output by the casting forming roller group; the film sheet output from the tempering heating device enters a cooling shaping roller set for cooling shaping and then is conveyed to a track shaping machine; the heat-conducting components of the crawler shaping machine bear the membrane for conveying and naturally cooling, and the moving speed of the membrane along with the heat-conducting components is matched with the membrane output by the cooling shaping roller set; and finally, the membrane conveyed on the crawler shaping machine is rolled and processed by a rolling machine.

Specifically, in the actual control process, the film output by the die head firstly enters the casting forming roller group for casting forming, and the film is output from the casting forming roller group, has a certain conveying speed and enters the tempering heating device.

The film entering the tempering heating device is carried and conveyed by a conveying net, and the speed of conveying the film by the conveying net is matched with the speed of outputting the film from the casting forming roller set, so that the film in the tempering heating device is not subjected to external force when being heated to pass through, and a stable process temperature field is provided in the tempering heating device to ensure that residual stress in the film is completely released.

The internal stress of the diaphragm output from the tempering heating device is basically eliminated, and the diaphragm enters the cooling shaping roller set for cooling shaping, so that the diaphragm can be completely cooled and shaped in a very short time through the cooling shaping roller set after the internal stress of the diaphragm is completely released. In order to avoid new stress caused by external force in the shaping process of the film, the speed of conveying the film by the cooling shaping roller set is matched with the conveying speed of the casting shaping roller set and the conveying net of the front equipment.

After the film is cooled and shaped, the film is conveyed to a caterpillar shaping machine from a cooling shaping roller set, and is further cooled by utilizing a natural heat dissipation mode, wherein the heat conduction component can accelerate the natural heat dissipation efficiency of the film on one hand so as to meet the requirement that the temperature of the film reaches the room temperature during rolling, and further avoid deformation caused by larger internal and external temperature differences of the film after rolling; on the other hand, the moving speed of the heat conduction component is matched with the speed of the diaphragm output by the cooling shaping roller set, the diaphragm is not subjected to additional force, the natural cooling process is prolonged, and finally the tension of the coiled diaphragm is stable and the coiled diaphragm is smooth.

In another embodiment of the present application, the EVA film extrusion line is the EVA film extrusion line in the second embodiment. The specific control method comprises the following steps: the thickness gauge detects the thickness of the passing diaphragm to acquire the thickness information of the diaphragm output by the die head main body, and the controller controls the transverse moving mechanism to drive the rotating part to move to the corresponding adjusting rod to be adjusted according to the thickness information fed back by the thickness gauge, and the controller controls the rotating part to drive the adjusting rod to rotate by a set angle.

Specifically, in the operation process of the EVA film extrusion production line, before the film formed by processing is rolled by the rolling machine, the thickness of the film is detected by the thickness gauge, the thickness information of the film detected by the thickness gauge is fed back to a controller of the EVA film extrusion production line, and the controller compares the received thickness information with the thickness value of the film set by an operator. When the thickness of the membrane exceeds the set membrane thickness value and exceeds the range, the controller adjusts the adjusting rod on the membrane head main body through the automatic adjusting component. The adjusting rods at different positions are used for adjusting the thickness of a specific area of the diaphragm, and the controller drives the rotating part to move to the corresponding adjusting rod position according to the fed-back thickness value of the over-range area of the diaphragm, and then the rotating part drives the adjusting rod to rotate by a certain angle value so as to adjust the distance between the two die lips and the corresponding position area of the adjusting rod, and further the thickness of the diaphragm is adjusted.

Further, the control method includes an initialization mode; under the initialization mode, the traversing mechanism drives the rotating part to sequentially move to each adjusting rod and drives the adjusting rods to rotate through the rotating part, and the controller records the initial rotating angle of the rotating part at each adjusting rod.

Specifically, since the rotation angles corresponding to the rotation parts are different after the different adjustment rods are adjusted, the adjustment requirements of the different adjustment rods are met through a single rotation part. In the initialization mode, after the state of each adjusting rod is adjusted by the rotating component, the controller records the angle value of the rotating component corresponding to the adjusting rod, which is required to rotate. Like this, in normal operating process, if need carry out on-line adjustment to this regulation pole, then after rotating the part and remove this regulation pole, adjust the rotating part earlier and rotate to the angular position who matches with this regulation pole, and then after rotating the part and be connected with adjusting the pole, can avoid leading to the technical problem that the regulation precision descends because of misplacement to reach accurate control regulation pole rotation, and then accurate adjustment diaphragm's thickness improves the processingquality of diaphragm.

Further, the control method includes an on-line adjustment mode;

Specifically, in the normal operation process of the EVA film extrusion production line, when the adjusting rod is required to be adjusted, the rotating part rotates to an initial rotation angle corresponding to the adjusting rod, and then the adjusting rod is correspondingly adjusted according to the thickness value detected by the thickness gauge. And after the adjustment operation of the adjusting rod is completed, the controller updates the rotation angle value of the rotating component to the initial rotation angle after the controller completes the adjustment of the recording adjusting rod. Therefore, in the later adjustment process, each adjusting rod can be accurately aligned and connected, and each adjusting rod can be accurately adjusted, so that the processing quality of the membrane is improved.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. The EVA adhesive film extrusion production line comprises an extruder, a tape casting forming machine and a winding machine which are sequentially arranged, wherein a die head for extruding a film is arranged on the extruder, and the tape casting forming machine comprises a tape casting forming roller set and a cooling shaping roller set; the EVA adhesive film extrusion production line is characterized by further comprising a tempering heating device and a caterpillar setting machine;

2. The EVA film extrusion production line according to claim 1, wherein the case comprises an upper case and a lower case, a plurality of the quartz heating pipes are respectively provided in the upper case and the lower case, which are arranged side by side, the upper case and the lower case are respectively provided on the mounting bracket, the upper case is located above the lower case, a space is formed between an end of the upper case and an end of the lower case, and the belt body of the conveying mesh belt located at an upper portion penetrates through the space and is located between the upper case and the lower case.

3. The EVA film extrusion line of claim 2, wherein the lower housing is further provided with at least one support roller, the support roller being rotatably disposed on the lower housing, the conveyor belt being abutted against the support roller.

4. The EVA film extrusion production line according to claim 1, wherein the track setting machine further comprises a support frame, two sprocket shafts, two conveying chains and a second driving motor, the two ends of the sprocket shafts are respectively provided with a sprocket, one of the sprocket shafts is rotatably arranged at one end of the support frame, the other sprocket shaft is rotatably arranged at the other end of the support frame, the second driving motor is in transmission connection with one of the sprocket shafts, the conveying chains are wound on the two sprockets on the corresponding sides, and a plurality of the heat conducting components are arranged between the two conveying chains.

5. The EVA film extrusion production line according to claim 1, wherein a plurality of through holes are further provided on the heat conducting surface.

6. The EVA film extrusion line of any one of claims 1-5, further comprising a thickness gauge and a controller, the thickness gauge being disposed rearward of the tempering heating apparatus;

the die head comprises:

7. The EVA film extrusion production line of claim 6, wherein the traversing mechanism comprises a mounting frame, a guide rail, a screw rod, a moving seat and a first servo motor, the guide rail and the screw rod are arranged side by side on the mounting frame, the first servo motor is configured to drive the screw rod to rotate on the mounting frame, the moving seat is slidably arranged on the guide rail, a threaded hole is arranged on the moving seat, and the screw rod is in threaded connection with the threaded hole;

8. A control method of the EVA film extrusion line according to any one of claims 6 to 7, comprising: the film output by the die head enters a casting forming roller group for casting forming, the film subjected to casting forming treatment enters a tempering heating device and is carried by a conveying net, and in the tempering heating process of the film in the tempering heating device, the conveying speed of the conveying net is matched with the film output by the casting forming roller group; the film sheet output from the tempering heating device enters a cooling shaping roller set for cooling shaping and then is conveyed to a track shaping machine; the heat-conducting components of the crawler shaping machine bear the membrane for conveying and naturally cooling, and the moving speed of the membrane along with the heat-conducting components is matched with the membrane output by the cooling shaping roller set; and finally, the membrane conveyed on the crawler shaping machine is rolled and processed by a rolling machine.

9. The control method of the EVA film extrusion production line according to claim 8, further comprising the step of detecting the thickness of the passing film by a thickness gauge to obtain thickness information of the film, wherein the controller controls the traversing mechanism to drive the rotating part to move to a corresponding adjusting rod to be adjusted according to the thickness information fed back by the thickness gauge, and the controller controls the rotating part to drive the adjusting rod to rotate by a set angle.

10. The control method of an EVA film extrusion line according to claim 9, characterized in that the control method includes an initialization mode and an on-line adjustment mode;