EVA adhesive film extrusion equipment

Abstract

The utility model relates to industrial manufacturing technical field, and disclose a kind of EVA adhesive film extrusion equipment, the EVA adhesive film extrusion equipment, including extrusion pipe, fixed mounting is installed on the extrusion pipe installation ring, fixed mounting is installed on the extrusion pipe installation ring, fixed mounting is installed on the installation ring support, extrusion assembly is provided on the extrusion pipe, and the extrusion assembly includes feed hopper.This EVA adhesive film extrusion equipment, to make the device more satisfy photovoltaic package and other high-precision scene demand, by being provided with extrusion assembly, the component cooperation stirring motor drives the propeller on straight rod in feed hopper form spiral stirring flow field, EVA particle and additive are fully mixed, avoid the extrusion defect caused by raw material caking, simultaneously servo motor drives material feeding knife control material conveying, cooperation adjustment filter plate in die head intercepts impurity, improves adhesive film melt purity, and the sliding design of plug rod in connecting groove can fine adjustment die head flow passage sectional area.

Description

Technical Field

[0001] This utility model relates to the field of industrial manufacturing technology, specifically to an EVA film extrusion device. Background Technology

[0002] EVA film is a key material in photovoltaic module encapsulation, architectural laminated glass bonding, and electronic product assembly. Its production quality directly affects the performance and lifespan of the end products.

[0003] The EVA film extrusion equipment mainly consists of a hopper, a screw extruder, a die, a cooling and shaping device, a traction device, and a control system. The hopper stores the EVA raw material and evenly feeds it to the screw extruder via a quantitative feeding system. The screw extruder is equipped with multi-stage heating zones and a specially structured screw, achieving melting and full plasticization of the raw material through heating and screw rotation. The die is designed according to the film width and thickness requirements, extruding the plasticized EVA melt into shape. The cooling and shaping device uses a combination of air and water cooling to rapidly cool the film and ensure its shape stability. The traction device pulls the film to the winding station at a constant speed. The control system integrates temperature sensors, pressure sensors, and a thickness gauge to monitor and adjust the equipment's operating parameters in real time.

[0004] However, the above-mentioned equipment has obvious shortcomings in use. Traditional equipment mostly adopts simple stirring or no stirring design, which results in insufficient mixing of EVA particles and additives, which easily leads to agglomeration and causes defects such as bubbles and thickness fluctuations in the extruded film, resulting in a high scrap rate. In view of this, we propose an EVA film extrusion equipment. Utility Model Content

[0005] The purpose of this invention is to provide an EVA film extrusion device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An EVA film extrusion device includes an extrusion tube, a mounting ring fixedly mounted on the extrusion tube, a bracket fixedly mounted on the mounting ring, and support legs fixedly mounted on the bracket. An extrusion assembly is disposed on the extrusion tube, and the extrusion assembly includes:

[0008] A feeding funnel, on which a cover is snapped and installed, a feeding pipe is fixedly installed on the cover, a stirring motor is fixedly installed on the cover, a straight rod is fixedly installed at the output end of the stirring motor, and a propeller is fixedly installed on the straight rod;

[0009] Mounting base, a mounting base is fixedly mounted on one end of the extrusion tube, a servo motor is fixedly mounted on the mounting base, a feeding knife is fixedly mounted on the output end of the servo motor, and an adjusting die head is fixedly mounted on the other end of the extrusion tube, and a connecting groove is opened on the adjusting die head;

[0010] A filter plate is fixedly installed on the adjusting mold head, a blocking rod is slidably installed on the connecting groove, one end of a connecting pipe is fixedly installed on the adjusting mold head, and a film mold head is fixedly installed on the other end of the connecting pipe.

[0011] In a further embodiment, the propeller is disposed inside the feed hopper, which is positioned above the extrusion tube, and the feed hopper is connected to the internal space of the extrusion tube.

[0012] In a further embodiment, the feeding knife is disposed inside the extrusion tube, the blocking rod slides inside the connecting groove, and the filter plate is disposed inside the connecting groove.

[0013] In a further embodiment, the extrusion tube is connected to the internal space of the film die head via a connecting groove, and the film body is extruded at the outlet of the film die head.

[0014] In a further embodiment, an auxiliary component is provided on the extrusion tube. The auxiliary component includes a connector. The connector is fixedly installed on the extrusion tube. A fan is fixedly installed at the bottom of the connector. An air guide ring is fixedly installed on the connector. An air outlet is opened at the top of the air guide ring.

[0015] In a further embodiment, multiple sets of the connector, fan, air guide ring, and air outlet are provided, with the connector and fan positioned below the extrusion pipe.

[0016] In a further embodiment, the inner circular cross-section of the air guide ring is the same size as the circular cross-section of the extrusion tube, and the air guide ring wraps around the extrusion tube.

[0017] Compared with the prior art, the present invention provides an EVA film extrusion device, which has the following beneficial effects:

[0018] 1. This EVA film extrusion equipment, in order to better meet the high-precision requirements of photovoltaic packaging and other scenarios, is equipped with an extrusion component. This component, together with the propeller on the straight rod driven by the stirring motor, forms a spiral stirring flow field in the feeding funnel, which fully mixes EVA particles and additives, avoiding extrusion defects caused by raw material agglomeration. At the same time, the servo motor drives the feeding knife to control the material conveying, and the filter plate in the adjusting die head intercepts impurities, improving the purity of the film melt. In addition, the sliding design of the blocking rod in the connecting groove can finely adjust the cross-sectional area of ​​the die head flow channel. Combined with the gradient pore size distribution of the filter plate, the film thickness tolerance can be controlled.

[0019] 2. To ensure the stability of the optical properties and bonding strength of the EVA film extrusion equipment, an auxiliary component is installed. This component, in conjunction with multiple sets of fans, delivers cold air to the air guide ring through the connector. The annular gap between the inner ring of the air guide ring and the outer wall of the extrusion tube ensures uniform airflow distribution. The airflow forms an annular air curtain through the air outlet, rapidly reducing the temperature of the film material inside the extrusion tube. The cooling efficiency is improved compared to natural cooling. The design of the air guide ring wrapping around the extrusion tube prevents cold air leakage. With the frequency conversion control of the fans, the cooling intensity can be adjusted in real time according to the film thickness to prevent film warping caused by uneven cooling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure and production process of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure production process from another perspective of this utility model;

[0022] Figure 3 This is a schematic diagram of the production process of part of the structure of this utility model;

[0023] Figure 4 This is a cross-sectional schematic diagram of the extrusion tube structure of this utility model;

[0024] Figure 5 This is a schematic cross-sectional view of part of the structure of this utility model;

[0025] Figure 6 This is a cross-sectional view of part of the structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the auxiliary component structure of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Extrusion tube; 2. Mounting ring; 3. Bracket; 4. Support leg;

[0029] 5. Film body; 6. Extrusion assembly; 61. Feed funnel; 62. Cover; 63. Feed pipe; 64. Stirring motor; 65. Straight rod; 66. Propeller; 67. Mounting base; 68. Servo motor; 69. Adjusting die head; 610. Connecting groove; 611. Filter plate; 612. Blocking rod; 613. Connecting pipe; 614. Film die head; 615. Feeding knife;

[0030] 7. Auxiliary components; 71. Connector; 72. Fan; 73. Air guide ring; 74. Air outlet. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0033] Please see Figures 1-7 This utility model provides a technical solution:

[0034] An EVA film extrusion device includes an extrusion tube 1, an installation ring 2 fixedly mounted on the extrusion tube 1, a bracket 3 fixedly mounted on the installation ring 2, and a support leg 4 fixedly mounted on the bracket 3.

[0035] In one embodiment of this utility model, an extrusion assembly 6 is provided on the extrusion tube 1. The extrusion assembly 6 includes a feeding funnel 61, a cover 62 is snapped onto the feeding funnel 61, a feeding tube 63 is fixedly installed on the cover 62, a stirring motor 64 is fixedly installed on the cover 62, a straight rod 65 is fixedly installed at the output end of the stirring motor 64, a propeller 66 is fixedly installed on the straight rod 65, a mounting base 67 is fixedly installed at one end of the extrusion tube 1, a servo motor 68 is fixedly installed on the mounting base 67, a feeding blade 615 is fixedly installed at the output end of the servo motor 68, and an adjusting die head 69 is fixedly installed at the other end of the extrusion tube 1. The adjusting die head 69 has a connecting groove 610. A filter plate 611 is fixedly installed on the top, a blocking rod 612 is slidably installed on the connecting groove 610, one end of a connecting pipe 613 is fixedly installed on the adjusting die head 69, and a film die head 614 is fixedly installed on the other end of the connecting pipe 613. A propeller 66 is set inside the feeding funnel 61, which is located above the extrusion tube 1 and is connected to the internal space of the extrusion tube 1. A feeding knife 615 is set inside the extrusion tube 1, the blocking rod 612 slides inside the connecting groove 610, the filter plate 611 is set inside the connecting groove 610, the extrusion tube 1 is connected to the internal space of the film die head 614 through the connecting groove 610, and the film body 5 is extruded at the outlet of the film die head 614.

[0036] In this embodiment, the stirring motor 64 is first fixed to the cover 62. The output rod 65 drives the propeller 66 to rotate in the feed funnel 61, forming a spiral stirring flow field. EVA particles and additives enter from the feed pipe 63. The propeller 66 fully mixes the raw materials to prevent clumping. At the same time, the cover 62 is locked to the feed funnel 61 to prevent dust leakage. Meanwhile, the output of the servo motor 68 drives the feeding knife 615 to rotate inside the extrusion tube 1, pushing the mixed raw materials forward. The rotation speed of the feeding knife 615 is precisely controlled by the servo motor 68 to ensure stable material delivery. The material enters the adjusting die head 69 through the extrusion tube 1. The filter plate 611 in the connecting groove 610 intercepts impurities in the raw materials. At the same time, the blocking rod 612 slides in the connecting groove 610. The material flow rate is controlled by adjusting the cross-sectional area of ​​the flow channel. The material enters the film die head 614 through the connecting pipe 613 and is extruded from the outlet to form the film body 5.

[0037] In one embodiment of this utility model, an auxiliary component 7 is provided on the extrusion tube 1. The auxiliary component 7 includes a connector 71. The connector 71 is fixedly installed on the extrusion tube 1. A fan 72 is fixedly installed at the bottom of the connector 71. An air guide ring 73 is fixedly installed on the connector 71. An air outlet 74 is opened at the top of the air guide ring 73. Multiple sets of connector 71, fan 72, air guide ring 73 and air outlet 74 are provided. The connector 71 and fan 72 are located below the extrusion tube 1. The inner circular cross-section of the air guide ring 73 is the same size as the circular cross-section of the extrusion tube 1. The air guide ring 73 wraps around the extrusion tube 1.

[0038] In this embodiment, the blower 72 sends cold air into the air guide ring 73, which forms an annular air curtain through the air outlet 74 and blows vertically onto the surface of the extrusion tube 1, which can rapidly reduce the temperature of the film material and improve the cooling efficiency compared to natural cooling. The wrapping design of the air guide ring 73 reduces the leakage of cold air, and the blower 72 is controlled by frequency conversion to prevent uneven cooling from causing the film surface to warp.

[0039] All electrical components mentioned in this application are electrically connected to the PLC controller and 220V AC mains power. The PLC controller is a conventional and known device that can control the stirring motor 64, the servo motor 68, and the fan 72. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. The machinery, parts, and equipment are all conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art.

[0040] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An EVA film extrusion device, comprising an extrusion tube (1), an installation ring (2) fixedly mounted on the extrusion tube (1), a bracket (3) fixedly mounted on the installation ring (2), and a support leg (4) fixedly mounted on the bracket (3), characterized in that: An extrusion assembly (6) is provided on the extrusion tube (1), and the extrusion assembly (6) includes: A feeding hopper (61) is fitted with a cover (62), a feeding pipe (63) is fixedly installed on the cover (62), a stirring motor (64) is fixedly installed on the cover (62), a straight rod (65) is fixedly installed at the output end of the stirring motor (64), and a propeller (66) is fixedly installed on the straight rod (65). Mounting base (67), one end of the extrusion tube (1) is fixedly mounted with mounting base (67), a servo motor (68) is fixedly mounted on mounting base (67), a feeding knife (615) is fixedly mounted on the output end of the servo motor (68), an adjusting die head (69) is fixedly mounted on the other end of the extrusion tube (1), and a connecting groove (610) is provided on the adjusting die head (69). The filter plate (611) is fixedly installed on the adjusting mold head (69), the blocking rod (612) is slidably installed on the connecting groove (610), one end of the connecting pipe (613) is fixedly installed on the adjusting mold head (69), and the other end of the connecting pipe (613) is fixedly installed with the film mold head (614).

2. The EVA film extrusion equipment according to claim 1, characterized in that: The propeller (66) is located inside the feed hopper (61), which is located above the extrusion tube (1). The feed hopper (61) is connected to the internal space of the extrusion tube (1).

3. The EVA film extrusion equipment according to claim 1, characterized in that: The feeding knife (615) is located inside the extrusion tube (1), the blocking rod (612) slides inside the connecting groove (610), and the filter plate (611) is located inside the connecting groove (610).

4. The EVA film extrusion equipment according to claim 1, characterized in that: The extrusion tube (1) is connected to the internal space of the film die head (614) through the connecting groove (610), and the film body (5) is extruded at the outlet of the film die head (614).

5. The EVA film extrusion equipment according to claim 1, characterized in that: An auxiliary component (7) is provided on the extrusion tube (1). The auxiliary component (7) includes a connector (71). The connector (71) is fixedly installed on the extrusion tube (1). A fan (72) is fixedly installed at the bottom of the connector (71). An air guide ring (73) is fixedly installed on the connector (71). An air outlet (74) is opened at the top of the air guide ring (73).

6. The EVA film extrusion equipment according to claim 5, characterized in that: Multiple sets of connector (71), fan (72), air guide ring (73) and air outlet (74) are provided, and connector (71) and fan (72) are located below extrusion pipe (1).

7. An EVA film extrusion device according to claim 5, characterized in that: The inner circular cross-section of the air guide ring (73) is the same size as the circular cross-section of the extrusion tube (1), and the air guide ring (73) wraps around the extrusion tube (1).

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