阅读说明：本技术 一种双层抗氧化型eva复合胶膜及其制备方法和装置 (Double-layer antioxidant EVA composite adhesive film and preparation method and device thereof ) 是由 蔡书义 焦华 于 2021-09-08 设计创作，主要内容包括：本发明涉及EVA复合胶膜生产技术领域,具体涉及一种双层抗氧化型EVA复合胶膜及其制备方法和装置。本发明设计的喷头包括硬质的长喷管和短喷管,短喷管下端设置有半圆形的短喷头,可进行圆周范围内的雾化喷洒,长喷管深入原料内部,通过左右对称的长喷孔进行两侧喷洒,有效提高混合效率,使交联剂等和EVA胶粒混合更加均匀,提高产品质量。设计的成型机构可以通过调节螺母调节活动板和固定板间隙,进而灵活调节复合胶膜挤出厚度。设计的切割运输机构的滑块做往复运动的速度和传送带速度一致时,当切刀运动到切割触发块正下方时,切割触发块可以驱动切刀向下运动,此时切刀相对于复合胶膜做垂直向下的直线运动,可以提升切割质量。(The invention relates to the technical field of EVA composite adhesive film production, in particular to a double-layer antioxidant EVA composite adhesive film and a preparation method and a device thereof. The spray head designed by the invention comprises the hard long spray pipe and the short spray pipe, the semicircular short spray head is arranged at the lower end of the short spray pipe, atomization spraying in a circumferential range can be carried out, the long spray pipe extends into the raw materials, and spraying is carried out on two sides through the bilaterally symmetrical long spray holes, so that the mixing efficiency is effectively improved, the cross-linking agent and the like are mixed with EVA (ethylene vinyl acetate) colloidal particles more uniformly, and the product quality is improved. The forming mechanism of design can adjust fly leaf and fixed plate clearance through adjusting nut, and then nimble compound glued membrane of adjusting extrudes thickness. When the speed of reciprocating motion is unanimous with conveyer belt speed to the slider of the cutting transport mechanism of design, when the cutter moved under the cutting trigger block, the cutting trigger block can drive the cutter downstream, and the cutter is perpendicular decurrent linear motion for compound glued membrane this moment, can promote the cutting quality.)

1. A double-layer anti-oxidation EVA composite adhesive film is characterized in that the adhesive film consists of a transparent EVA adhesive film and a white EVA adhesive film,

the transparent EVA comprises the following raw materials in parts by weight:

97-99 parts of ethylene-vinyl acetate copolymer;

0.2-0.3 part of triallyl isocyanurate;

0.1-0.15 part of ethoxylated trimethylolpropane triacrylate;

0.8-1 part of tert-butyl peroxycarbonic acid-2-ethylhexyl ester;

0.1-0.2 part of 3 (methacryloyloxy) propyltrimethoxysilane;

0.1-0.15 part of bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate;

0.05-0.1 part of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecyl alcohol ester;

the white EVA comprises the following raw materials in parts by weight:

91-92 parts of ethylene-vinyl acetate copolymer;

0.1-0.15 part of triallyl isocyanurate;

0.6-0.8 part of tert-butyl peroxycarbonic acid-2-ethylhexyl ester;

0.1-0.2 part of 3 (methacryloyloxy) propyltrimethoxysilane;

0.15-0.2 part of bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate;

7.5-8.5 parts of titanium dioxide.

2. The utility model provides a compound glued membrane preparation facilities of double-deck anti-oxidant type EVA, the device include mix mechanism (1), rabbling mechanism (2), single screw extruder (3), forming mechanism (4) and cutting transport mechanism (5) in advance, its characterized in that, mix mechanism (1) below in advance and be provided with rabbling mechanism (2), rabbling mechanism (2) rear is provided with single screw extruder (3), is provided with forming mechanism (4) between two parallel distribution's single screw extruder (3), is provided with cutting transport mechanism (5) between two parallel distribution's rabbling mechanism (2).

3. The preparation device of the double-layer antioxidant EVA composite adhesive film according to claim 2, wherein the premixing mechanism (1) comprises a support frame (13), the top of the support frame (13) is provided with a support ring (131), the lower surface of the support ring (131) is provided with three support columns (132) which are distributed in parallel, the lower ends of the support columns (132) are provided with fixing rings (133), and the lower surface of each fixing ring (133) is provided with two fixing beams (15) which are distributed in parallel;

the upper surface of the support ring (131) is provided with a fixing table (11), a plurality of charging barrels (12) are fixed on the upper circumference of the fixing table (11), sealing covers (121) are arranged on the upper surfaces of the charging barrels (12), metering valves (122) are arranged on the lower surfaces of the charging barrels (12), premixing barrels (14) are arranged below the charging barrels (12) and can preliminarily mix reagents in the charging barrels, and the premixing barrels (14) are fixed in fixing rings (133).

4. The device for preparing the double-layer antioxidant EVA composite adhesive film according to claim 2, wherein the stirring mechanism (2) comprises two bases (21) arranged below the fixed beam (15) and distributed in parallel, a stirring barrel (22) is fixed between the bases (21), a cavity (221) is formed in the stirring barrel (22), a cover plate (222) is arranged at one end of the stirring barrel (22), a discharge hole (2221) is formed in the position, close to the bottom, of the cover plate (222), a spray head (24) is arranged above the cavity (221), the spray head (24) penetrates through the stirring barrel (22) and is connected with a feed pump (23), the feed pump (23) is communicated with the premixing barrel (14), a stirring blade (25) is arranged in the middle of the cavity (221), a motor (26) is arranged on the outer side of one end, far away from the cover plate (222), of the stirring barrel (22), a feed hole (27) communicated with the cavity (221) is arranged above the motor (26), two ends of the stirring blade (25) are respectively and fixedly connected with the output end of the motor (26) and rotatably connected with the cover plate (222).

5. The preparation device of the double-layer antioxidant EVA composite adhesive film according to claim 4, wherein the middle of the upper surface of the spray head (24) is communicated with a feed delivery pipe (241), the feed delivery pipe (241) is connected with a feed delivery pump (23), the lower surface of the spray head (24) is provided with a plurality of linearly distributed long spray pipes (242) and a plurality of linearly distributed short spray pipes (243), the long spray pipes (242) and the short spray pipes (243) are distributed at intervals, long spray heads (2421) are arranged below the long spray pipes (242), a plurality of symmetrically distributed spray holes (2422) are formed in two sides of the long spray heads (2421), and an arc-shaped short spray head (2431) is arranged below the short spray pipes (243).

6. The preparation device of the double-layer antioxidant EVA composite adhesive film according to claim 2, wherein the single-screw extruder (3) comprises a single-screw extruder main body (31) communicated with the discharge port, one end of the single-screw extruder main body (31) far away from the stirring mechanism (2) is connected with a melting pump (32), and one side of the melting pump (32) far away from the single-screw extruder main body (31) is connected with a conveying pipe (33).

7. The device for preparing the double-layer antioxidant EVA composite adhesive film according to claim 2, wherein the forming mechanism (4) comprises a forming body (44) connected with the conveying pipe (33), a forming head (41) is arranged on the front side of the forming body (44), the forming head (41) comprises a fixed plate (412) fixed on the side of the forming body (44), two sides of the fixed plate (412) are provided with symmetrically distributed limit plates (413), a movable plate (411) is arranged right above the fixed plate (412), two sides of the upper surface of the movable plate (411) are provided with symmetrically distributed connecting blocks (4111), the limit plates (413) are fixedly connected with fixed threaded rods (43), the connecting blocks (4111) are slidably connected with the fixed threaded rods (43), the fixed threaded rods (43) are in threaded connection with adjusting nuts (415), and the adjusting nuts (415) are in contact with the upper surfaces of the connecting blocks (4111), a spring (414) is arranged between the limiting plate (413) and the connecting block (4111), the spring (414) is arranged on the outer side of the cylindrical surface of the fixed threaded rod (43), a feeding hole (42) is formed in the side surface of the forming main body (44), and the feeding hole (42) is matched with the conveying pipe (33).

8. The device for preparing the double-layer antioxidant EVA composite adhesive film according to claim 2, wherein the cutting and transporting mechanism (5) comprises a conveyor belt (51) arranged on the front side of the forming mechanism (4), cutting bases (52) are symmetrically arranged on both sides of the conveyor belt (51), a cutting track (521) is formed on the side surface of each cutting base (52) close to the conveyor belt (51), a cutting trigger block (522) is arranged on the side surface of each cutting base (52) close to the conveyor belt (51) and located on the inner side of the cutting track (521), a sliding rail (53) is arranged on the upper surface of each cutting base (52), a sliding block (54) is arranged on each sliding rail (53), the sliding block (54) reciprocates along the sliding rail (53) under the action of an external driving device, a connecting frame (541) is arranged on the side surface of each sliding block (54) close to the conveyor belt (51), and a sliding rod (542) is slidably arranged on each connecting frame (541), the lower end of the sliding rod (542) is fixedly connected with a tool rest (55), a spring (543) is arranged on the cylindrical surface of the sliding rod (542) located between the connecting frame (541) and the tool rest (55), sliding shafts (551) are arranged on two side surfaces of the tool rest (55), the sliding shafts (551) are matched with the cutting track (521), a cutter (552) in sliding connection is arranged on the lower surface of the tool rest (55), a sliding block (5521) is arranged on the cutter (552), and a return spring is arranged between the cutter (552) and the tool rest (55).

9. The device for preparing the double-layer anti-oxidation EVA composite adhesive film according to claim 2, wherein the cutting trigger block (522) is triangular and the inclined direction of the lower surface is the same as the moving direction of the conveyor belt (51).

10. A preparation process of the double-layer anti-oxidation EVA composite adhesive film based on the double-layer anti-oxidation EVA composite adhesive film preparation device of any one of claims 2-9, which is characterized by comprising the following steps:

s1, respectively adding the metered EVA (ethylene-vinyl acetate copolymer) resin particles into two stirring mechanisms (2);

s2, controlling a metering valve (122) to respectively add proper amounts of cross-linking agent, antioxidant and the like into the two premixing barrels (14) according to the proportion of the transparent EVA formula and the white EVA formula, and completing mixing in the premixing barrels (14);

s3, controlling the temperature in the stirring barrel (22) at 45-55 ℃, and simultaneously performing stirring and spraying actions;

s4, after the spraying is finished, repeatedly stirring the mixture in the positive and negative directions once by taking 20 minutes as a period;

s5, after stirring, feeding the mixed materials into a single-screw extruder (3), heating the single-screw extruder to 80-100 ℃ to enable the raw materials to be in a molten state, conveying the raw materials to a forming mechanism (4), adjusting the thickness of a formed adhesive film through an adjusting nut (415), and conveying the formed composite adhesive film by a conveying belt (51);

s6, the sliding block (54) reciprocates to drive the cutting knife (552) to move along the cutting track (421), and when the cutting trigger block (522) is moved, the cutting trigger block (522) presses the sliding block (5221) downwards to enable the cutting knife (552) to move downwards, so that the cutting of the composite adhesive film is completed.

Technical Field

The invention relates to the technical field of EVA composite adhesive film production, in particular to a double-layer antioxidant EVA composite adhesive film and a preparation method and a device thereof.

Background

The traditional packaging adhesive film for the solar photovoltaic module is mainly an ethylene-vinyl acetate copolymer (EVA) adhesive film.

However, in the power generation process of the solar photovoltaic module, negative voltage can be generated through the outer frame, so that sodium ions and potassium ions in the glass penetrate through the film layer to reach the surface of the cell, a positive electric field is formed on the surface of the cell in an aggregation manner, negative charges generated inside the cell are formed in an aggregation manner to form a negative electric field for counter balancing, current carriers in the cell are reduced, the power generation efficiency of the cell is reduced, and a PID (proportion integration differentiation) phenomenon is generated. The EVA composite adhesive film can effectively delay the PID phenomenon, but because the solar photovoltaic module is installed outdoors, the environment is severe, and the single-layer EVA composite adhesive film is difficult to adapt to the complex and severe field environment, the multi-layer EVA composite adhesive film is more and more widely applied, and the double-layer EVA composite adhesive film with the oxidation resistance has the advantages of long service life and stable protection effect. However, the quality of the produced antioxidant EVA composite adhesive film is reduced due to the fact that the production process and the production equipment of the antioxidant multilayer EVA composite adhesive film are not matched at present, and the cutting quality is also reduced due to the fact that the adhesive film is in a moving state when the adhesive film is cut after molding.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a double-layer antioxidant EVA composite adhesive film, and a method and an apparatus for preparing the same.

The purpose of the invention can be realized by the following technical scheme:

the double-layer antioxidant EVA composite adhesive film consists of a transparent EVA adhesive film and a white EVA adhesive film, and the formulas of the two adhesive films are as follows:

the formula of the transparent EVA is as follows:

97-99 parts of ethylene-vinyl acetate copolymer;

0.2-0.3 part of triallyl isocyanurate;

0.1-0.15 part of ethoxylated trimethylolpropane triacrylate;

0.8-1 part of tert-butyl peroxycarbonic acid-2-ethylhexyl ester;

0.1-0.2 part of 3 (methacryloyloxy) propyltrimethoxysilane;

0.1-0.15 part of bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate;

0.05-0.1 part of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecyl alcohol ester;

the formula of the white EVA is as follows:

91-92 parts of ethylene-vinyl acetate copolymer;

0.1-0.15 part of triallyl isocyanurate;

0.6-0.8 part of tert-butyl peroxycarbonic acid-2-ethylhexyl ester;

0.1-0.2 part of 3 (methacryloyloxy) propyltrimethoxysilane;

0.15-0.2 part of bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate;

7.5-8.5 parts of titanium dioxide.

The utility model provides a double-deck anti-oxidant type EVA composite adhesive film preparation facilities, the device includes mixes mechanism, rabbling mechanism, single screw extruder, forming mechanism and cutting transport mechanism in advance, it is provided with the rabbling mechanism to mix the mechanism below in advance, and the rabbling mechanism rear is provided with single screw extruder, is provided with forming mechanism between two parallel distribution's the single screw extruder, is provided with cutting transport mechanism between two parallel distribution's the rabbling mechanism.

Furthermore, the premixing mechanism comprises a support frame, a support ring is arranged at the top of the support frame, three support columns distributed in parallel are arranged on the lower surface of the support ring, a fixing ring is arranged at the lower end of each support column, and two fixing beams distributed in parallel are arranged on the lower surface of each fixing ring;

the support ring upper surface is provided with the fixed station, and the circumference is fixed with a plurality of buckets on the fixed station, and the bucket upper surface is provided with sealed lid, and the bucket lower surface is provided with the metering valve, and the bucket below is provided with and mixes the bucket in advance, can carry out preliminary mixing with the reagent in the bucket, mixes the bucket in advance and fixes in the fixed ring.

Further, rabbling mechanism is including setting up two parallel distribution's in fixed beam below base, be fixed with the agitator between the base, the inside cavity that opens of agitator, agitator one end is provided with the apron, the apron has the discharge gate near the position of bottom, the inner chamber top is provided with the shower nozzle, the shower nozzle runs through the agitator and is connected with the conveying pump, conveying pump and premix barrel intercommunication, the inner chamber middle part is provided with stirring vane, the outside that apron one end was kept away from to the agitator is provided with the motor, the motor top is provided with the feed inlet of intercommunication inner chamber, stirring vane both ends respectively with motor output fixed connection, rotate with the apron and connect.

Furthermore, the middle part of the upper surface of the spray head is communicated with a conveying pipe, the conveying pipe is connected with a conveying pump, the lower surface of the spray head is provided with a plurality of linearly distributed long spray pipes and a plurality of linearly distributed short spray pipes, the long spray pipes and the short spray pipes are distributed at intervals, a long spray head is arranged below the long spray pipes, spray holes which are symmetrically distributed are formed in two sides of the long spray head, and an arc-shaped short spray head is arranged below the short spray pipes.

Furthermore, single screw extruder includes the single screw extruder main part with the discharge gate intercommunication, and the one end that single screw extruder main part kept away from rabbling mechanism is connected with the melting pump, and the one side that single screw extruder main part was kept away from to the melting pump is connected with the conveyer pipe.

Further, forming mechanism includes the shaping main part with duct connections, shaping main part leading flank is provided with the shaping head, the shaping head is including fixing the fixed plate in shaping main part side, the fixed plate both sides are provided with the limiting plate of symmetric distribution, be provided with the fly leaf directly over the fixed plate, fly leaf upper surface both sides are provided with the connecting block of symmetric distribution, limiting plate and fixed threaded rod fixed connection, connecting block and fixed threaded rod sliding connection, threaded connection has adjusting nut on the fixed threaded rod, surface contact on adjusting nut and the connecting block, be provided with the spring between limiting plate and the connecting block, the spring sets up in the fixed threaded rod face of cylinder outside, shaping main part side is provided with the feed port, feed port and conveyer pipe cooperation.

Further, the cutting and transporting mechanism comprises a conveyor belt arranged on the front side face of the forming mechanism, symmetrically distributed cutting seats are arranged on two sides of the conveyor belt, a cutting track is formed in the side face, close to the conveyor belt, of each cutting seat, a cutting trigger block is arranged at the position, close to the inner side of the cutting track, of the side face, close to the conveyor belt, of each cutting seat, a slide rail is arranged on the upper surface of each cutting seat, a slide block is arranged on each slide rail, the slide blocks reciprocate along the slide rails under the action of an external driving device, a connecting frame is arranged on the side face, close to the conveyor belt, of each slide block, a slide rod is arranged on each connecting frame in a sliding mode, a cutter rest is fixedly connected to the lower end of each slide rod, a spring is arranged on the cylindrical face, located between each connecting frame and the corresponding cutter rest, sliding shafts are arranged on two side faces of the corresponding cutter rests, sliding shafts are matched with the corresponding cutting tracks, sliding blocks are arranged on the lower surfaces of the cutter rests, and reset springs are arranged between the cutters.

Furthermore, the cutting trigger block is triangular, and the inclined direction of the lower surface of the cutting trigger block is the same as the moving direction of the conveyor belt.

Further, the preparation process of the double-layer anti-oxidation EVA composite adhesive film preparation device comprises the following steps:

s1, respectively adding the metered EVA resin particles into two stirring mechanisms;

s2, controlling a metering valve to respectively add proper amounts of cross-linking agent, antioxidant and the like into the two premixing barrels according to the proportion of the transparent EVA formula and the white EVA formula, and completing mixing in the premixing barrels;

s3, controlling the temperature in the stirring barrel to be 45-55 ℃, and simultaneously performing stirring and spraying actions;

s4, after the spraying is finished, repeatedly stirring the mixture in the positive and negative directions once by taking 20 minutes as a period;

s5, after stirring, feeding the mixed material into a single-screw extruder, heating the single-screw extruder to 80-100 ℃ to enable the raw material to be in a molten state, conveying the raw material to a forming mechanism, adjusting the thickness of a formed adhesive film through an adjusting nut, and conveying the formed composite adhesive film by a conveying belt;

and S6, the slide block reciprocates to drive the cutter to move along the cutting track, and when the slide block moves to the cutting trigger block, the cutting trigger block presses the slide block downwards to enable the cutter to move downwards, so that the cutting of the composite adhesive film is completed.

The invention has the beneficial effects that:

1. the spray head designed by the invention comprises a hard long spray pipe and a short spray pipe, wherein the lower end of the short spray pipe is provided with a semicircular short spray head which can spray in an atomizing manner within a circumferential range, and the long spray pipe extends into the raw material and sprays on two sides through the long spray holes which are symmetrical left and right. Both spray on the surface and inside of EVA micelle simultaneously, effectively improve mixing efficiency, make cross-linking agent etc. more even with the EVA micelle mixture, improve product quality.

2. The forming mechanism designed by the invention can adjust the gap between the movable plate and the fixed plate through the adjusting nut, thereby flexibly adjusting the extrusion thickness of the composite adhesive film.

3. When the speed of the reciprocating motion of the sliding block of the cutting and transporting mechanism is consistent with the speed of the conveyor belt, the cutting trigger block can drive the cutting knife to move downwards when the cutting knife moves to the position right below the cutting trigger block, and the cutting knife vertically and downwards linearly moves relative to the composite adhesive film, so that the cutting quality can be improved, and the composite adhesive film is prevented from being stacked and scraped due to the horizontal relative motion of the cutting knife and the composite adhesive film.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts;

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic of the construction of the premix mechanism;

FIG. 3 is a cross-sectional view of the agitation mechanism;

FIG. 4 is a schematic structural view of the head;

FIG. 5 is a schematic structural view of a molding mechanism;

FIG. 6 is a schematic view of the structure of the cutting conveyance mechanism;

fig. 7 is a schematic view of the internal structure of the cutting conveyance mechanism.

The reference numbers in the figures illustrate:

1. a premixing mechanism; 11. a fixed table; 12. a charging bucket; 121. a sealing cover; 122. a metering valve; 13. a support frame; 131. a support ring; 132. a support pillar; 133. a fixing ring; 14. a premix barrel; 15. a fixed beam; 2. a stirring mechanism; 21. a base; 22. a stirring barrel; 221. an inner cavity; 222. a cover plate; 2221. a discharge port; 23. a delivery pump; 24. a spray head; 241. a delivery pipe; 242. a long nozzle; 2421. a long nozzle; 2422. a long orifice; 243. a short nozzle; 2431. a short nozzle; 25. a stirring blade; 26. a motor; 27. a feed inlet; 3. a single screw extruder; 31. a single screw extruder body; 32. a melt pump; 33. a delivery pipe; 4. a molding mechanism; 41. a forming head; 411. a movable plate; 4111. connecting blocks; 412. a fixing plate; 413. a limiting plate; 414. a spring; 415. adjusting the nut; 42. a feed port; 43. fixing a threaded rod; 44. forming a main body; 5. a cutting and conveying mechanism; 51. a conveyor belt; 52. a cutting seat; 521. cutting the track; 522. cutting the trigger block; 53. a slide rail; 54. a slider; 541. a connecting frame; 542. a slide bar; 543. a spring; 55. a tool holder; 551. a sliding shaft; 552. a cutter; 5521. and a slider.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A double-layer anti-oxidation EVA composite adhesive film and a preparation method and a device thereof are disclosed, wherein the device comprises a premixing mechanism 1, a stirring mechanism 2, a single-screw extruder 3, a forming mechanism 4 and a cutting and transporting mechanism 5.

As shown in fig. 1, a stirring mechanism 2 is arranged below two premixing mechanisms 1 distributed in parallel, a single screw extruder 3 is arranged behind the stirring mechanism 2, a forming mechanism 4 is arranged between the two single screw extruders 3 distributed in parallel, and a cutting and transporting mechanism 5 is arranged between the two stirring mechanisms 2 distributed in parallel.

As shown in fig. 1 and 2, the premixing mechanism 1 includes a support frame 13, a support ring 131 is disposed on the top of the support frame 13, three support columns 132 distributed in parallel are disposed on the lower surface of the support ring 131, a fixing ring 133 is disposed at the lower end of each support column 132, and two fixing beams 15 distributed in parallel are disposed on the lower surface of the fixing ring 133;

the upper surface of the support ring 131 is provided with a fixing table 11, and a plurality of charging barrels 12 are fixed on the circumference of the fixing table 11 and used for adding different cross-linking agents, antioxidants and the like according to different formulations of EVA adhesive films. The upper surface of the charging basket 12 is provided with a sealing cover 121, the lower surface of the charging basket 12 is provided with a metering valve 122, the amount of the reagent discharged from the charging basket 12 can be controlled by an upper computer control center according to the proportion of the formula, and the proportion is ensured to be accurate. The upper computer is the prior art and is omitted in the invention. A premixing barrel 14 is arranged below the charging barrel 12, and can be used for primarily mixing reagents in the charging barrel, and the premixing barrel 14 is fixed in the fixing ring 133.

As shown in fig. 1 and 3, the stirring mechanism 2 includes two bases 21 disposed below the fixed beam 15 and distributed in parallel, a stirring barrel 22 is fixed between the bases 21, an inner cavity 221 is formed inside the stirring barrel 22, a cover plate 222 is disposed at one end of the stirring barrel 22, a discharge hole 2221 is formed at a position of the cover plate 222 close to the bottom, a spray head 24 is disposed above the inner cavity 221, the spray head 24 penetrates through the stirring barrel 22 and is connected with a feed delivery pump 23, and the feed delivery pump 23 is communicated with the premixing barrel 14. The middle part of the inner cavity 221 is provided with a stirring blade 25, the outer side of one end of the stirring barrel 22 far away from the cover plate 222 is provided with a motor 26, a feed inlet 27 communicated with the inner cavity 221 is arranged above the motor 26, and two ends of the stirring blade 25 are respectively fixedly connected with the output end of the motor 26 and rotatably connected with the cover plate 222.

As shown in fig. 4, the middle part of the upper surface of the nozzle 24 is communicated with a material conveying pipe 241, the material conveying pipe 241 is connected with the material conveying pump 23, the lower surface of the nozzle 24 is provided with a plurality of linearly distributed long spray pipes 242 and a plurality of linearly distributed short spray pipes 243, the long spray pipes 242 and the short spray pipes 243 are distributed at intervals, a long nozzle 2421 is arranged below the long spray pipe 242, a plurality of symmetrically distributed spray holes 2422 are formed in two sides of the long nozzle 2421, and an arc-shaped short nozzle 2431 is arranged below the short spray pipe 243.

As shown in fig. 1, 3 and 5, the single screw extruder 3 includes a single screw extruder body 31 communicating with the discharge port, a melting pump 32 is connected to one end of the single screw extruder body 31 away from the stirring mechanism 2, and a conveying pipe 33 is connected to one side of the melting pump 32 away from the single screw extruder body 31.

Forming mechanism 4 includes the shaping main part 44 of being connected with conveyer pipe 33, shaping main part 44 leading flank is provided with shaping head 41, shaping head 41 is including fixing the fixed plate 412 in shaping main part 44 side, fixed plate 412 both sides are provided with symmetric distribution's limiting plate 413, be provided with fly leaf 411 directly over the fixed plate 412, fly leaf 411 upper surface both sides are provided with symmetric distribution's connecting block 4111, limiting plate 413 and fixed threaded rod 43 fixed connection, connecting block 4111 and fixed threaded rod 43 sliding connection, threaded connection has adjusting nut 415 on the fixed threaded rod 43, adjusting nut 415 and connecting block 4111 upper surface contact. A spring 414 is arranged between the limiting plate 413 and the connecting block 4111, and the spring 414 is arranged outside the cylindrical surface of the fixed threaded rod 43. The profile body 44 is provided with a feed opening 42 on the side, the feed opening 42 cooperating with the duct 33.

As shown in fig. 1, 6, and 7, the cutting and transporting mechanism 5 includes a conveyor belt 51 disposed on the front side of the forming mechanism 4, cutting bases 52 symmetrically disposed on both sides of the conveyor belt 51 are provided, a cutting track 521 is disposed on the side of the cutting base 52 close to the conveyor belt 51, a cutting trigger block 522 is disposed on the side of the cutting base 52 close to the conveyor belt 51 and inside the cutting track 521, the cutting trigger block 522 is triangular, and the inclined direction of the lower surface is the same as the moving direction of the conveyor belt 51. The upper surface of the cutting seat 52 is provided with a slide rail 53, the slide rail 53 is provided with a slide block 54, the slide block 54 can reciprocate along the slide rail 53 under the action of an external driving device, the side surface of the slide block 54 close to the conveyor belt 51 is provided with a connecting frame 541, the connecting frame 541 is provided with a slide bar 542 in a sliding manner, the lower end of the slide bar 542 is fixedly connected with a cutter frame 55, a cylindrical surface of the slide bar 542 between the connecting frame 541 and the cutter frame 55 is provided with a spring 543, the two side surfaces of the cutter frame 55 are provided with slide shafts 551, and the slide shafts 551 are matched with the cutting track 521. The lower surface of the cutter frame 55 is provided with a sliding connected cutter 552, the cutter 552 is provided with a sliding block 5521, and a return spring is arranged between the cutter 552 and the cutter frame 55.

Heating parts of the stirring mechanism 2 and the single-screw extruder 3 in the device are both electrically heated, and are not described in detail in the prior art, and parts for driving the sliding block 54 to reciprocate can adopt the prior art such as an air cylinder or a gear rack, and are not described in detail in the invention.

The preparation process of the double-layer antioxidant EVA composite adhesive film comprises the following steps:

s1, the measured EVA (ethylene vinyl acetate copolymer) resin particles are added to the two stirring mechanisms 2, respectively.

And S2, controlling the metering valves 122 to respectively add proper amounts of cross-linking agents, antioxidants and the like into the two pre-mixing barrels 14 according to the proportion of the transparent EVA formula and the white EVA formula, and completing mixing in the pre-mixing barrels 14.

S3, controlling the temperature in the stirring barrel 22 to be 45-55 ℃, and simultaneously carrying out stirring and spraying actions.

And S4, after the spraying is finished, repeatedly stirring in the positive and negative directions once by taking 20 minutes as a cycle.

And S5, after stirring, feeding the mixed material into a single-screw extruder 3, heating the single-screw extruder to 80-100 ℃ to enable the raw material to be in a molten state, conveying the raw material to a forming mechanism 4, adjusting the thickness of a formed adhesive film through an adjusting nut 415, and conveying the formed composite adhesive film by a conveyor belt 51.

S6, the slider 54 reciprocates to drive the cutter 552 to move along the cutting track 421, and when the cutter 522 is moved to the cutting trigger block 522, the cutting trigger block 522 presses the sliding block 5221 downward, so that the cutter 552 moves downward to complete the cutting of the composite adhesive film.

The formula of the transparent EVA is as follows:

97-99 parts of ethylene-vinyl acetate copolymer;

0.2-0.3 part of triallyl isocyanurate;

0.1-0.15 part of ethoxylated trimethylolpropane triacrylate;

0.8-1 part of tert-butyl peroxycarbonic acid-2-ethylhexyl ester;

0.1-0.2 part of 3 (methacryloyloxy) propyltrimethoxysilane;

0.1-0.15 part of bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate;

0.05-0.1 part of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid n-octadecyl alcohol ester.

The formula of the white EVA is as follows:

91-92 parts of ethylene-vinyl acetate copolymer

0.1-0.15 part of triallyl isocyanurate

0.6-0.8 part of tert-butyl peroxydicarbonate-2-ethylhexyl ester

0.1-0.2 part of 3 (methacryloyloxy) propyltrimethoxysilane

0.15-0.2 part of bis (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate

7.5 to 8.5 portions of titanium dioxide

An example of the operation of the device is as follows:

in the production process, the metered EVA rubber particles are added into the two mixing tanks 22 through the feed inlet 27, and the metering valve 122 is controlled according to the formula proportion to add the cross-linking agent into the two pre-mixing tanks according to the amount of the added EVA rubber particles. Oxidant, etc., the mixed cross-linking agent is sprayed in the EVA colloidal particle through the spray head 24, stirring is carried out while spraying, the stirred cross-linking agent enters the single-screw extruder main body 31 through the discharge port 2221 after stirring is finished, the EVA particles are heated to a molten state by the single-screw extruder main body and are extruded into the forming mechanism 4, the forming thickness of the antioxidant composite adhesive film can be adjusted through the adjusting nut 415 according to actual needs, the formed antioxidant composite adhesive film is conveyed through the conveyor belt 51, and the antioxidant composite adhesive film is cut by the cutter 552 arranged on the conveyor belt 51, when the reciprocating speed of the sliding block 54 is consistent with the speed of the conveyor belt, the cutter 552 can vertically and downwardly cut relative to the antioxidant composite adhesive film, and the cutting quality is ensured.

The composite adhesive film produced by the device consists of transparent EVA and white EVA, wherein the transparent EVA adhesive film is added with an antioxidant, and compared with the traditional single-layer adhesive film, the antioxidant double-layer EVA composite adhesive film produced by the device has more excellent oxidation resistance.

The beneficial effects are as follows:

the spray head 24 designed by the device comprises a hard long spray pipe 242 and a short spray pipe 243, the lower end of the short spray pipe 243 is provided with a semicircular short spray head 2431 which can spray in a circumferential range, and the long spray pipe 242 extends into the raw material and sprays on two sides through a long spray hole 2422 which is symmetrical left and right. Both spray on the surface and inside of EVA micelle simultaneously, effectively improve mixing efficiency, make cross-linking agent etc. more even with the EVA micelle mixture, improve product quality.

The forming mechanism designed by the device can adjust the gap between the movable plate 411 and the fixed plate 412 through the adjusting nut 415, and further flexibly adjust the extrusion thickness of the composite adhesive film.

When the speed of the reciprocating motion of the sliding block 54 of the cutting and transporting mechanism 5 designed by the device is consistent with the speed of the conveyor belt, when the cutting knife moves to the position right below the cutting trigger block 522, the cutting trigger block 522 can drive the cutting knife to move downwards, and at the moment, the cutting knife 522 vertically moves downwards linearly relative to the composite adhesive film, so that the cutting quality can be improved, and the composite adhesive film is prevented from being stacked and scraped due to the relative motion of the cutting knife 522 and the composite adhesive film in the horizontal direction.

The composite adhesive film produced by the device is composed of transparent EVA and white EVA, and is added with an antioxidant, and has more excellent oxidation resistance compared with the traditional single-layer adhesive film.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.