Raw material feeding device for EVA adhesive film production

Abstract

This utility model discloses a raw material feeding device for EVA film production, including symmetrically arranged side plates. A conveyor belt for conveying raw materials is provided at one end of each side plate. A discharge chute for guiding the raw materials to the extruder is provided between the side plates below the conveyor belt. A screening mechanism is provided between the conveyor belt and the discharge chute. An air supply component is provided on the side plates above the conveyor belt and the screening mechanism. This utility model has a simple structure and reasonable design, achieving the effect of screening and feeding. It avoids large, clumped raw materials from directly entering the extruder through the discharge chute, improving feeding accuracy and subsequent product quality. Furthermore, clumped raw materials can be effectively dispersed under the action of pressure rollers and then fed back to the conveyor belt for screening, improving raw material utilization. Simultaneously, the air outlet effect of the side air outlet and the top air outlet further dries the screened raw materials and assists in their descent, further improving the state and particle size of the raw materials.

Description

Technical Field

[0001] This utility model relates to the technical field of EVA film feeding equipment, specifically a raw material feeding and discharging device for EVA film production. Background Technology

[0002] EVA encapsulant film for photovoltaic modules is a key functional material, whose performance directly affects the light transmittance, weather resistance, and lifespan of photovoltaic modules. In the production process of EVA encapsulant film, precise feeding and mixing of raw materials are crucial to ensuring the uniformity and stability of the film. Currently, EVA encapsulant film is mainly produced using extrusion molding, and the raw material feeding system has a decisive impact on the stability of the extrusion process and the quality of the final product.

[0003] The shortcomings of existing technology:

[0004] Currently, in existing EVA film production processes, EVA granules and liquid additives are typically fed into the extruder manually or via conveyor belt. However, EVA granules are prone to clumping during storage and transportation due to moisture absorption or electrostatic adsorption. These clumped granules are difficult to disperse fully after entering the extruder, leading to an imbalance in the mixing ratio with the liquid additives. This uneven mixing directly affects the uniformity of the melt system, causing problems such as film thickness fluctuations, surface defects, or uneven performance, ultimately reducing the product yield. Therefore, developing a device that can effectively prevent raw material clumping and improve feeding accuracy is of great significance for improving the production quality of EVA films. Utility Model Content

[0005] The purpose of this invention is to provide a raw material feeding and discharging device for EVA film production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a raw material feeding and discharging device for EVA film production, comprising symmetrically arranged side plates, a conveyor belt for conveying raw materials is provided at one end of the side plates, a discharge chute for guiding the raw materials to an extruder is provided between the side plates below the conveyor belt, a screening mechanism is provided between the conveyor belt and the discharge chute, and an air supply component is provided on the side plates above the conveyor belt and the screening mechanism;

[0007] The screening mechanism includes:

[0008] A receiving basin, one end of which is rotatably connected to a horizontal shaft between side plates. A screening screen is provided on the receiving side of the receiving basin above the discharge chute. A pressure roller for crushing raw materials is provided on the side of the receiving basin away from the conveyor belt.

[0009] A vibratory motor is mounted on a mounting platform inside the side plate, and the output end of the vibratory motor is equipped with a telescopic component for driving the receiving basin to vibrate.

[0010] The return chute is located on the side plate. One end of the return chute is located below the receiving basin and on one side of the pressure roller. The other end of the return chute is located above the conveyor belt. A flexible conveyor belt is installed inside the return chute.

[0011] Preferably, the air supply assembly includes:

[0012] A fan, wherein the fan is mounted on the side wall of the side plate;

[0013] A side air outlet duct is provided on the inner wall of the side plate above the conveyor belt. A top air outlet box is provided between the side plates above the screening screen. The fan is connected to the side air outlet duct and the top air outlet box through an air duct to deliver air.

[0014] Preferably, the telescopic component includes:

[0015] A wheel is provided at the output end of a vibrating motor. A first connecting rod is eccentrically rotatably connected to the wheel body. A second connecting rod is rotatably connected to the upper end of the first connecting rod. The upper end of the second connecting rod is connected to the lower end face of the receiving basin on the side away from the pressure roller.

[0016] A limiting strip is horizontally disposed between the side plates, and the limiting strip is slidably connected to the rod body of the second connecting rod through a through hole.

[0017] Preferably, the receiving side of the receiving basin should be higher than the discharging side.

[0018] Preferably, the discharge trough has a through groove for the screened raw materials to fall into.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This raw material feeding device for EVA film production is equipped with a screening mechanism, which includes a receiving basin, a screening screen, a pressure roller, a vibrating motor, a telescopic component, and a return chute. This achieves the effect of screening and feeding, preventing large clumps of raw material from directly entering the extruder through the discharge chute, thus improving the feeding accuracy and subsequent product quality. Furthermore, the clumps of raw material can be effectively dispersed under the action of the pressure roller and then transported back to the conveyor belt for the next round of screening and feeding, thereby improving the utilization rate of raw materials and avoiding waste.

[0021] 2. The raw material feeding device for EVA film production is equipped with an air supply component, which includes a fan, a side air outlet duct, and a top air outlet box. The side air outlet duct generates a transverse airflow on the conveyor belt to initially dry the raw material. At the same time, the air outlet box further dries the raw material on the screening screen and assists the raw material in falling, thereby further improving the state and particle size of the raw material. Attached Figure Description

[0022] Figure 1 This is a front view schematic diagram of the internal structure of this utility model;

[0023] Figure 2 This is a top view of the entire utility model;

[0024] Figure 3 This is an overall side view of the present invention.

[0025] In the diagram: 1. Side plate; 2. Conveyor belt; 3. Discharge chute; 301. Through chute; 4. Screening mechanism; 401. Receiving basin; 402. Screening screen; 403. Pressure roller; 404. Vibrating motor; 405. Telescopic assembly; 4051. Wheel; 4052. First connecting rod; 4053. Second connecting rod; 4054. Limiting strip; 406. Return chute; 5. Air supply assembly; 501. Fan; 502. Side air outlet chute; 503. Top air outlet box. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified. Example

[0030] Please see Figure 1-3 As shown, this utility model provides a technical solution for a raw material feeding and discharging device for EVA film production: A raw material feeding and discharging device for EVA film production includes symmetrically installed side plates 1. A conveyor belt 2 for conveying raw materials is installed at one end inside the side plates 1. A discharge chute 3 for guiding the raw materials to an extruder is installed between the side plates 1 below the conveyor belt 2. A through groove 301 is opened on the discharge chute 3 for the screened raw materials to fall into. A screening mechanism 4 is installed between the conveyor belt 2 and the discharge chute 3 for separating the bonded raw materials. An air supply assembly 5 is installed on the side plates 1 above the conveyor belt 2 and the screening mechanism 4 for cooling the raw materials. The screening mechanism 4 includes a receiving basin 401, a vibrating motor 404, and a return chute 406. One end of the receiving basin 401 is rotatably connected to the horizontal shaft between the side plates 1. A screening screen 402 is installed on the receiving side of the receiving basin 401 above the discharge chute 3. A pressure roller 403 for crushing raw materials is installed on the side of the receiving basin 401 away from the conveyor belt 2. The pressure roller 403 has a built-in motor for self-drive. The receiving basin 401 is tilted as a whole, and its receiving side should be higher than its discharge side. A vibrating motor 404 is fixedly installed on the mounting platform inside the side plate 1. A telescopic component 405 for driving the receiving basin 401 to vibrate is installed at the output end of the vibrating motor 404. A return chute 406 is installed on the side plate 1. One end of the return chute 406 is installed below the receiving basin 401 and on one side of the pressure roller 403. The other end of the return chute 406 is located above the conveyor belt 2. A flexible conveyor belt is installed inside the return chute 406. The return chute 406 conveys the raw materials crushed by the pressure roller 403 back to the conveyor belt 2 through the flexible conveyor belt for secondary screening and feeding.

[0031] When the feeding device is working, the vibrating motor 404 is started, and the receiving basin 401 and the screening screen 402 begin to vibrate up and down. The raw material is input through the conveyor belt 2, and after being screened by the screening screen 402, the separated raw material particles fall into the discharge trough 3 through the through trough 301 and are conveyed into the extruder. If the raw material clumps due to high temperature or moisture, it cannot pass through the screening screen 402 smoothly. Under the tilting vibration effect of the receiving basin 401, the clumped raw material will move to the lower end of the receiving basin 401, be crushed by the pressure roller 403 and discharged into the return trough 406. Finally, the crushed raw material particles fall back into the conveyor belt 2 under the conveyor of the return trough 406 for secondary feeding and screening. If it still cannot pass through the screening screen 402, it will continue to be crushed by the pressure roller 403 for a third feeding and screening until it can be screened.

[0032] The screening mechanism 4 achieves the effect of screening and feeding, preventing large clumps of raw materials from directly entering the extruder through the discharge chute 3, thus improving the feeding accuracy and subsequent product quality. Furthermore, the clumps of raw materials can be effectively dispersed under the action of the pressure roller 403 and then transported back to the conveyor belt 2 for the next round of screening and feeding, thereby improving the utilization rate of raw materials and avoiding waste.

[0033] The air supply assembly 5 includes a blower 501 and a side air outlet duct 502. The blower 501 is mounted on the side wall of the side plate 1. The side air outlet duct 502 is located on the inner wall of the side plate 1 above the conveyor belt 2. The side air outlet duct 502 is used to provide a drying airflow to dry the raw materials on the conveyor belt 2 when the feeding and discharging device is working. A top air box 503 is installed between the side plates 1 above the screening screen 402. The airflow discharged from the top air box 503 blows towards the screening screen 402. When the feeding and discharging device is working, the blower 501 is connected to the side air outlet duct 502 and the top air box 503 through an air duct to supply air.

[0034] The raw materials are initially dried by the transverse airflow generated on the conveyor belt 2 by the air supply component 5 and the side air outlet 502. At the same time, the air outlet effect of the top air box 503 is used to further dry the raw materials on the screening screen 402 and assist the raw materials to fall, thereby further improving the state and particle size of the raw materials.

[0035] Telescopic assembly 405 includes:

[0036] The wheel 4051 is fixedly installed at the output end of the vibrating motor 404. The wheel 4051 is eccentrically connected to the disc body of the wheel 4051. The upper end of the first connecting rod 4052 is rotatably connected to the second connecting rod 4053. The upper end of the second connecting rod 4053 is connected to the lower end face of the receiving basin 401 on the side away from the pressure roller 403.

[0037] Limiting strip 4054 is horizontally installed between side plates 1. Limiting strip 4054 is slidably connected to the rod body of second connecting rod 4053 through through holes.

[0038] When the receiving basin 401 and the screening screen 402 need to be vibrated for screening, the vibration motor 404 is started. The vibration motor 404 drives the wheel 4051 to rotate. The eccentric shaft on the wheel 4051 then drives the second connecting rod 4053 to slide up and down in the through hole on the limit strip 4054 through the first connecting rod 4052, thereby achieving the effect of moving one end of the receiving basin 401 up and down, which is vibration. The vibration frequency can be adjusted by controlling the speed of the vibration motor 404.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A raw material feeding device for EVA adhesive film production, comprising symmetrically arranged side plates (1), characterized in that: A conveyor belt (2) for conveying raw materials is provided at one end of the side plate (1). A discharge chute (3) for guiding raw materials to an extruder is provided between the side plates (1) below the conveyor belt (2). A screening mechanism (4) is provided between the conveyor belt (2) and the discharge chute (3). An air supply assembly (5) is provided on the side plate (1) above the conveyor belt (2) and the screening mechanism (4). The screening mechanism (4) includes: A receiving basin (401) is rotatably connected at one end to a horizontal shaft between side plates (1). A screening screen (402) is provided on the receiving side of the receiving basin (401) above the discharge trough (3). A pressure roller (403) for crushing raw materials is provided on the side of the receiving basin (401) away from the conveyor belt (2). Vibration motor (404), the vibration motor (404) is mounted on the mounting platform inside the side plate (1), and the output end of the vibration motor (404) is provided with a telescopic component (405) for driving the receiving basin (401) to vibrate. The return trough (406) is set on the side plate (1). One end of the return trough (406) is located below the receiving basin (401) and on one side of the pressure roller (403). The other end of the return trough (406) is located above the conveyor belt (2). A flexible conveyor belt is provided inside the return trough (406).

2. The raw material feeding and discharging device for EVA film production according to claim 1, characterized in that: The air supply assembly (5) includes: A fan (501) is mounted on the side wall of the side plate (1); Side air outlet duct (502) is located on the inner wall of the side plate (1) above the conveyor belt (2). A top air outlet box (503) is provided between the side plates (1) above the screening screen (402). The fan (501) is connected to the side air outlet duct (502) and the top air outlet box (503) through the air duct to deliver air.

3. The raw material feeding and discharging device for EVA film production according to claim 1, characterized in that: The telescopic assembly (405) includes: A wheel (4051) is provided at the output end of a vibrating motor (404). A first connecting rod (4052) is eccentrically rotatably connected to the disc body of the wheel (4051). A second connecting rod (4053) is rotatably connected to the upper end of the first connecting rod (4052). The upper end of the second connecting rod (4053) is connected to the lower end face of the receiving basin (401) away from the pressure roller (403). A limiting strip (4054) is horizontally disposed between the side plates (1). The limiting strip (4054) is slidably connected to the rod body of the second connecting rod (4053) through a through hole.

4. The raw material feeding and discharging device for EVA film production according to claim 1, characterized in that: The receiving side of the receiving basin (401) should be higher than the discharging side.

5. The raw material feeding and discharging device for EVA film production according to claim 1, characterized in that: The discharge trough (3) is provided with a through trough (301) for the screened raw materials to fall into.

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