CN212206795U

CN212206795U - EVA (ethylene vinyl acetate) adhesive film sample preparation device

Info

Publication number: CN212206795U
Application number: CN201922056713.0U
Authority: CN
Inventors: 张乾; 陈荣; 王梁; 黄冰艳; 张定忠
Original assignee: CSI Solar Power Group Co Ltd; Changshu Tegu New Material Technology CoLtd
Current assignee: Canadian Solar Inc; Changshu Tegu New Material Technology CoLtd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-12-22
Anticipated expiration: 2029-11-25

Abstract

The utility model discloses a EVA adhesive film sample preparation device, which comprises a base for bearing an EVA adhesive film, a cutter and a driving mechanism for driving the cutter to move; the cutter is provided with cutting knives arranged in a grid shape. Compared with the prior art, the utility model discloses set up the cutting knife that is grid column structure on the cutter, make the cutter can cut into the graininess examination sample that awaits measuring of a plurality of finenesses that the size is unanimous with the EVA glued membrane after the cutting, make the examination sample that awaits measuring after cutting more even, cooperate actuating mechanism drive cutter to cut the glued membrane simultaneously and improved the preparation efficiency of examination sample.

Description

EVA (ethylene vinyl acetate) adhesive film sample preparation device

Technical Field

The utility model relates to a test system appearance field, especially one kind is used for EVA glued membrane system appearance device.

Background

The EVA adhesive film is a thermosetting adhesive film with viscosity and is arranged in the middle of laminated glass. Because of the superiority of the EVA adhesive film in adhesion, durability, optical properties, etc., it is more and more widely used in photovoltaic modules. The degree of crosslinking, also known as the crosslinking index, is usually expressed in terms of crosslinking density or number average molecular weight between two adjacent crosslinking points or moles of crosslinking points per cubic centimeter. The crosslinking degree is a core inspection standard of the EVA adhesive film inspection.

The conventional EVA crosslinking degree test adopts a xylene extraction mode, and xylene solvent is used for extracting the uncrosslinked part in the adhesive film sample, so that the crosslinking degree can be measured. During the crosslinking degree test, the EVA adhesive film needs to be cut into fine particles by scissors to form a test sample.

In the prior art, the procedure for manufacturing the test sample is mainly finished by manually cutting with scissors. The manual cutting is adopted to prepare the sample, so that time and labor are wasted, the cutting is not uniform, the size difference of the test sample is large, and the test fluctuation is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a EVA glued membrane system appearance device to solve not enough among the prior art, it can make the more even of the sample that awaits measuring after cutting, cooperates actuating mechanism drive cutter to cut the glued membrane simultaneously and has improved test sample's preparation efficiency.

The utility model provides an EVA adhesive film sample preparation device, which comprises a base for bearing an EVA adhesive film, a cutter and a driving mechanism for driving the cutter to move; the cutter is provided with cutting knives arranged in a grid shape.

As a further improvement, the EVA glued membrane system appearance device is still including the draw-in groove board that is used for suppressing the EVA glued membrane, be provided with the confession on the draw-in groove board the guiding hole that the cutting knife was worn to establish.

As a further improvement of the utility model, be provided with on the base and be used for the location chamber of draw-in groove board, just the location chamber with cutter looks adaptation.

As a further improvement of the utility model, the cutting knife includes a plurality of parallel arrangement's first cutter and perpendicular a plurality of second cutters that first cutter set up, it is adjacent distance between the first cutter and adjacent distance between the second cutter equals.

As a further improvement, the distance between the first cutters is not more than 3 mm.

As a further improvement, the base is provided with a bearing surface for bearing the EVA adhesive film and a plurality of avoiding grooves formed on the bearing surface in a concave manner, and the avoiding grooves are opposite to the cutting knife.

As a further improvement, the base is provided with an adhesive film mounting groove for positioning the EVA adhesive film.

As a further improvement of the present invention, the driving mechanism includes a hydraulic jack and a hydraulic pump for supplying hydraulic pressure to the hydraulic jack; and the base is provided with a sample preparation support for installing and fixing the hydraulic jack.

As a further improvement of the present invention, the first end of the hydraulic jack is fixed on the sample preparation support, and the second end of the hydraulic jack is fixedly connected to the cutter.

As a further improvement, the first end of the hydraulic jack is fixed on the sample preparation support, and the second end of the hydraulic jack extends freely in the direction of the base.

Compared with the prior art, the utility model discloses set up the cutting knife that is grid column structure on the cutter, make the cutter can cut into the unanimous a plurality of tiny graininess sample that awaits measuring of size with the EVA glued membrane after the cutting, make the examination sample that awaits measuring after cutting more even, cooperate actuating mechanism drive cutter to cut the glued membrane simultaneously and improved the preparation efficiency of test sample.

Drawings

Fig. 1 is a schematic structural diagram of an EVA glue film sample preparation device provided by an embodiment of the present invention;

fig. 2 is a schematic structural view of an EVA glue film sample preparation device according to the present invention, in which a notch plate is installed behind a base;

FIG. 3 is a schematic structural diagram of a cutter in an EVA film sample preparation device provided by an embodiment of the present invention;

fig. 4 is a schematic structural view of a notch plate in an EVA adhesive film sample preparation device provided by an embodiment of the present invention;

description of reference numerals: 1-base, 10-card slot positioning hole, 11-avoidance groove, 12-glue film mounting groove, 13-bearing surface,

2-a cutter, 21-a first cutter, 22-a second cutter,

3-driving mechanism, 31-hydraulic jack, 32-hydraulic pump,

4-a neck plate, 40-a guide hole, 41-a first guide hole, 42-a second guide hole, 5-a sample preparation bracket,

100-EVA adhesive film.

Detailed Description

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The embodiment of the utility model provides a: as shown in fig. 1-4, an EVA adhesive film sample preparation device is disclosed, which includes a base 1 for bearing an EVA adhesive film 100, a cutter 2, and a driving mechanism 3 for driving the cutter 2 to move; the cutter 2 is provided with cutting knives arranged in a grid shape.

The EVA film 100 is a whole EVA film to be cut, and the process of the sample prepared in this embodiment is to cut the EVA film 100 into a block of fine granular sample to be tested, so as to facilitate the test of the crosslinking degree. Placing EVA glued membrane 100 on base 1 at the use EVA glued membrane system appearance device in-process central line, then driving cutter 2 downstream through actuating mechanism 3 to the cutting knife that sets up on making cutter 2 realizes cutting EVA glued membrane 100. Because the cutting knife has a grid-shaped structure, the EVA adhesive film 100 can be cut into a plurality of fine particles with uniform sizes after one-time cutting. Compared with the prior art, the manual cutting mode is adopted, the cutting efficiency is improved, the uniformity of the cut particles is better, and the test fluctuation caused by inconsistent sizes of the cut particles is avoided. Meanwhile, the number of times of touching the adhesive film in the cutting process is less, so that the pollution to the adhesive film is avoided.

In this embodiment, the cutting knife includes a plurality of first cutting knives 21 arranged in parallel and a plurality of second cutting knives 22 arranged perpendicular to the first cutting knives 21, and a distance between adjacent first cutting knives 21 is equal to a distance between adjacent second cutting knives 22. The arrangement of the structure enables the cut sample to be tested to be in a square structure. The size of the adhesive film is often required to be less than 3mm in the process of carrying out the crosslinking degree test, so the side length of the cut sample to be tested needs to be set to be less than 3 mm. In order to meet the requirement, the distance between two adjacent first cutting blades 21 is not more than 3mm, and the distance between two adjacent second cutting blades 22 is not more than 3 mm.

In this embodiment, the cutter 2 and the driving mechanism 3 are separated, and there is no fixed connection between the two, and in the cutting process, the EVA film 100 is placed on the base 1, then the cutter 2 is placed on the EVA film 100, and the driving mechanism 3 presses the cutter 2 downwards, so that the cutter 2 cuts the EVA film 100. Of course, the tool 2 can also be fixed directly to the drive 3 and moved up and down by the drive 3.

Need manually place cutter 2 and need manually uninstall cutter 2 after cutting through split type setting, owing to the sample of awaiting measuring after cutting easily bonds on cutter 2 in the uninstallation in-process, consequently, in order to get rid of the glued membrane piece of the tiny granule that bonds on cutter 2, cutter 2 of this embodiment is directly formed by first cutter 21 and the mutual staggered connection of second cutter 22, the region of enclosing between first cutter 21 and the second cutter 22 is effective cutting unit, this effective cutting unit also is the position of the sample holding of awaiting measuring after being cut. In the present embodiment, the effective cutting unit is designed to be hollow, so that the small-particle glue film adhered to the cutter 2 can be conveniently removed. In addition, the effective cutting unit is hollow, so that the cutter 2 can be conveniently grabbed, and the loading or unloading of the cutter 2 can be conveniently realized.

Of course, in another embodiment, the first cutting knife 21 and the second cutting knife 22 may also be disposed on a knife rest, the knife back of the first cutting knife 21 and the knife back of the second cutting knife 22 are fixed on the knife rest, and the cutting edges of the first cutting knife 21 and the second cutting knife extend freely toward the direction of the base 1. A through hole is likewise provided in the blade holder opposite the active cutting unit.

Further for better avoid being awaited measuring after cutting and examine the sample adhesion on the cutting knife, the EVA glued membrane system appearance device of this embodiment still includes draw-in groove board 4 that is used for suppressing EVA glued membrane 100, be provided with the confession on the draw-in groove board 4 the guiding hole 40 that the cutting knife wore to establish.

The guide hole 40 includes a first guide hole 41 for the first cutter 21 to penetrate through and a second guide hole 42 for the second cutter 22 to penetrate through, and the first guide hole 41 and the second guide hole 42 are communicated with each other. The draw-in groove board 4 is pressed EVA glued membrane 100 on base 1, and first cutter 21 is worn to establish first guiding hole 41 in order to cut EVA glued membrane 100, and second cutter 22 is worn to establish second guiding hole 42 in order to cut EVA glued membrane 100, cuts the back because the corresponding position of effective cutting unit is pressed by draw-in groove board 4, consequently is cut into the sample of awaiting measuring and can not adhere on the cutting knife when the cutting knife withdraws to make things convenient for the use. Meanwhile, the guide hole 40 can also play a role in guiding the cutting knife, so that the cutting knife slides along the guide hole 40, and the deviation of the cutting knife in the use process is avoided.

In this embodiment, since the cutter 2 and the driving mechanism 3 are separated, the EVA film 100 needs to be mounted and fixed on the base 1 in the cutting process, and in order to facilitate the mounting and fixing of the EVA film 100, an adhesive film mounting groove 12 for positioning the EVA film 100 is provided on the base 1. The EVA adhesive film 100 is arranged in the adhesive film mounting groove 12 and then is provided with the card slot plate 4. Similarly, place in order to conveniently realize the installation of draw-in groove board 4 be provided with on the base 1 and be used for the location draw-in groove board 4's location chamber 10, draw-in groove board 4 and location chamber 10 clearance fit, draw-in groove board 4 can slide from top to bottom along location chamber 10, realizes compressing tightly EVA glued membrane 100 when draw-in groove board 4 slides at the bottom of the chamber of location chamber 10. Place cutter 2 installation after draw-in groove board 4 installation is fixed, the cutting knife on the cutter 2 corresponds with guiding hole 40 on the draw-in groove board 4, and the cutting knife is worn to establish guiding hole 40 and is made the cutting edge of cutting knife and EVA glued membrane 100 meet mutually. Then, the driving mechanism 3 is started, and the driving mechanism 3 generates a downward pressure to press the cutter 2 to cut the EVA film 100.

In the present exemplary embodiment, the positioning chamber 10 is also adapted to the tool 2; the cutter 2 slides up and down along the positioning cavity 10. The sliding of the multiple cutters 2 in the positioning cavity 10 also plays a role in limiting, so that the cutters 2 slide along the extending direction of the positioning cavity 10, and the situation that the cutting knife is not accurately aligned with the guide hole 40 on the slot plate 4 and damages the cutting knife in the moving process is avoided.

Further, in order to better realize the cutting of the EVA film 100, the base 1 is provided with a bearing surface 13 for bearing the EVA film 100 and a plurality of avoiding grooves 11 formed by the bearing surface 13 in a concave manner, and the avoiding grooves 11 are opposite to the cutting knife. The cutting knife can completely cut through the EVA adhesive film 100 by avoiding the arrangement of the groove 11.

Specifically, in the present embodiment, the driving mechanism 3 includes a hydraulic jack 31 and a hydraulic pump 32 for supplying hydraulic pressure to the hydraulic jack 31; the base 1 is provided with a sample preparation bracket 5 for installing and fixing the hydraulic jack 31. In the present embodiment, the hydraulic pump 32 is a manual hydraulic pump, but an electric hydraulic pump may be used as the hydraulic pump 32. The first end of the hydraulic jack 31 is fixed on the sample preparation bracket 5, and the second end of the hydraulic jack 31 is fixedly connected to the cutter 2.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims

1. The utility model provides a EVA glued membrane system appearance device which characterized in that: the EVA film cutting machine comprises a base for bearing an EVA film, a cutter and a driving mechanism for driving the cutter to move; the cutter is provided with cutting knives arranged in a grid shape; the cutting knife comprises a plurality of first cutting knives arranged in parallel and a plurality of second cutting knives arranged perpendicular to the first cutting knives, and the distance between every two adjacent first cutting knives is equal to the distance between every two adjacent second cutting knives.

2. The EVA adhesive film sample preparation device of claim 1, wherein: the EVA adhesive film sample preparation device further comprises a clamping groove plate used for pressing the EVA adhesive film, and a guide hole for the cutting knife to penetrate is formed in the clamping groove plate.

3. The EVA adhesive film sample preparation device of claim 2, wherein: the base is provided with a positioning cavity for positioning the slot plate, and the positioning cavity is matched with the cutter.

4. The EVA adhesive film sample preparation device of claim 1, wherein: the distance between two adjacent first cutters is not more than 3 mm.

5. The EVA adhesive film sample preparation device of claim 1, wherein: the base is provided with a bearing surface for bearing the EVA adhesive film and a plurality of avoiding grooves formed by the bearing surface in a concave mode, and the avoiding grooves are opposite to the cutting knife.

6. The EVA adhesive film sample preparation device of claim 1, wherein: and the base is provided with an adhesive film mounting groove for positioning an EVA adhesive film.

7. The EVA adhesive film sample preparation device of claim 1, wherein: the driving mechanism comprises a hydraulic jack and a hydraulic pump for providing hydraulic pressure for the hydraulic jack; and the base is provided with a sample preparation support for installing and fixing the hydraulic jack.

8. The EVA adhesive film sample preparation device of claim 7, wherein: the first end of the hydraulic jack is fixed on the sample preparation support, and the second end of the hydraulic jack is fixedly connected to the cutter.

9. The EVA adhesive film sample preparation device of claim 7, wherein: the first end of the hydraulic jack is fixed on the sample preparation support, and the second end of the hydraulic jack freely extends towards the direction of the base.