EVA (Ethylene Vinyl Acetate) sheet kneading device for feeding by driving sliding plate through air cylinder

Abstract

The utility model discloses an EVA (Ethylene Vinyl Acetate) sheet kneading device for feeding by using a sliding plate driven by an air cylinder, which comprises an EVA kneading internal mixer, a feeding hopper is arranged at the top of the EVA kneading internal mixer, a feeding sliding plate A is movably arranged on the right side of the upper part of the feeding hopper, a feeding sliding plate B is movably arranged on the left side of the upper part of the feeding hopper, and meanwhile, a charging barrel covers the feeding sliding plate B and the feeding sliding plate A; and an inner barrel is fixedly arranged in the charging barrel, driving air cylinders are movably installed on the feeding sliding plate A and the feeding sliding plate B correspondingly, and hinge bases are movably installed at the tops of the driving air cylinders through pin shafts. According to the EVA sheet kneading device for feeding by driving the sliding plate through the air cylinder, materials in the charging barrel can automatically fall into an EVA kneading internal mixer under the condition of gravity, automatic feeding work of the EVA kneading internal mixer is completed, manual feeding is not needed, and the situation that when a cover is opened manually for feeding, the materials in a high-temperature cavity in the sheet kneading device or splash is caused is avoided; and the risk that the skin is scalded and dust is inhaled is avoided.

Description

Technical Field

[0001] This utility model relates to the field of EVA sheet kneading internal mixers, specifically to an EVA sheet kneading device that uses a cylinder-driven sliding plate for feeding. Background Technology

[0002] EVA (ethylene vinyl acetate copolymer) is used in various fields due to its excellent plasticity, elasticity, and good foaming properties. Typically, the preparation of materials using EVA involves compounding it with other raw materials (such as fillers, crosslinking agents, and antioxidants), thoroughly mixing and mixing them to obtain a composite material, which is then processed and shaped to obtain the corresponding product. EVA sheets are an important derivative product of EVA. When processing EVA sheets, the EVA granules are first kneaded and mixed with other materials in a kneading mixer before being pressed into shape. Powdered materials (such as carbon black) are usually added to the raw materials that are kneaded and compounded with the EVA granules. Since the temperature inside the mixing chamber is usually between 100-200℃, when such powders are added to the mixing chamber, they tend to adhere to the inner wall of the mixer and cannot completely enter the mixing chamber, resulting in a certain degree of material loss. It is also difficult to clean the inner wall of the mixer. The material adhering to the inner wall of the mixer will affect the mixing effect of different batches of materials.

[0003] To address the aforementioned issues, a search revealed Chinese patent CN212241669U, which discloses an EVA sheet kneading and mixing machine for convenient powder feeding. The patent includes a feeding pipe 3 whose upper end passes through a top wall 211 and is connected to a powder storage hopper 5. Therefore, during powder feeding, the powder is first fed into the powder storage hopper 5, then enters the feeding pipe 3 through the first feeding port 12, and slides into the mixing chamber 2. A cover 51 is also provided at the upper end of the powder storage hopper 5.

[0004] Although the above-mentioned device can periodically remove the feeding pipe 3 from the internal mixer to remove the material adhering to its inner wall, in actual use, when the EVA sheet kneading device (internal mixer) is feeding material, when the lid is opened manually to feed material, the high temperature chamber or splashed material in the sheet kneading device poses a risk of skin burns and dust inhalation. Utility Model Content

[0005] The purpose of this invention is to provide an EVA sheet kneading device that uses a cylinder-driven sliding plate for feeding, in order to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, an EVA sheet kneading device with cylinder-driven sliding plate feeding is provided, comprising an EVA kneading internal mixer. A feeding hopper is installed on the top of the EVA kneading internal mixer. A feeding sliding plate A is movably installed on the upper right side of the feeding hopper, and a feeding sliding plate B is movably installed on the upper left side of the feeding hopper. A material cylinder is covered on both feeding sliding plate B and feeding sliding plate A. An inner cylinder is fixedly installed inside the material cylinder. A driving cylinder is movably installed on both feeding sliding plate A and feeding sliding plate B. A hinge seat is movably installed on the top of the driving cylinder through a pin. A horizontal frame is fixedly connected to the bottom of the hinge seat. A vertical frame is fixedly installed at the end of the horizontal frame. Four sets of vertical frames are evenly arranged. The bottom of the vertical frame is screwed to the side wall of the feeding hopper. The bottom sides of the material cylinder are fixed to the feeding hopper through mounting brackets.

[0007] Preferably, the top opening of the feeding hopper is covered and blocked by feeding slide A and feeding slide B. Feeding slide A has a triangular receiving opening at its end, and feeding slide B is a triangular structure made of plastic. Both feeding slide A and feeding slide B are equipped with mounting shafts at their ends, and feeding slide A and feeding slide B are movably mounted on the upper side of the inside of the feeding hopper via the mounting shafts.

[0008] Preferably, the feeding slide plate B is adapted to the size of the receiving opening, the feeding slide plate B is inserted into the inside of the receiving opening, and there is a gap between the feeding slide plate B and the receiving opening.

[0009] Preferably, a single set of drive cylinders is installed on the feeding slide plate B, or two sets of drive cylinders are installed on the feeding slide plate B, and the feeding slide plate B and the feeding slide plate B are opened and closed synchronously through the drive cylinders.

[0010] Preferably, the material cylinder is circular and has an inner cylinder inside. The axial cross-section of the inner cylinder and the material cylinder is a concentric circle structure, and six sets of isolation plates are evenly installed between the inner cylinder and the material cylinder.

[0011] Preferably, an outer cylinder is formed between two adjacent sets of isolation plates, the cross-section of the outer cylinder is fan-shaped, and the six sets of outer cylinders are centrally symmetrical about the central axis of the inner cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model uses the output shaft of multiple sets of drive cylinders to drive the feeding slide plate A and feeding slide plate B to rotate around the mounting shaft, so that the feeding slide plate A and feeding slide plate B open. The material inside the material cylinder can automatically fall into the EVA kneading mixer under gravity, completing the automatic feeding work of the EVA kneading mixer. No manual feeding is required, avoiding the risk of skin burns and dust inhalation caused by high temperature chamber or splashed material in the sheet kneading device when manually opening the lid for feeding.

[0014] 2. This utility model ensures that materials fall in a dispersed manner through the multi-layered distribution structure of the inner and outer cylinders, avoiding local accumulation or segregation and improving the uniformity of feeding; the design of six sets of outer cylinders expands the feeding coverage area, allowing materials to enter the EVA kneading mixer more evenly and improving mixing efficiency; the overall structure optimizes the material flow path, reduces the risk of blockage, and is suitable for high-precision proportioning and large-scale continuous production needs, further enhancing the stability and reliability of automated feeding. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 A bottom view;

[0017] Figure 3 for Figure 1 Side view;

[0018] Figure 4 for Figure 1 Top view;

[0019] Figure 5 This is a schematic diagram of the feeding slide plate A and feeding slide plate B of this utility model.

[0020] The following are the labels in the diagram: 1. EVA kneading internal mixer; 2. Feed hopper; 3. Feed slide plate A; 4. Feed slide plate B; 41. Mounting shaft; 5. Vertical frame; 6. Horizontal frame; 7. Hinge seat; 8. Drive cylinder; 9. Material cylinder; 10. Inner cylinder; 11. Isolation plate; 12. Outer cylinder. Detailed Implementation

[0021] Please see Figure 1-5 This utility model provides an EVA sheet kneading device with cylinder-driven sliding plate feeding, including an EVA kneading internal mixer 1. A feeding hopper 2 is installed on the top of the EVA kneading internal mixer 1. A feeding sliding plate A3 is movably installed on the upper right side of the feeding hopper 2, and a feeding sliding plate B4 is movably installed on the upper left side of the feeding hopper 2. At the same time, a material cylinder 9 is covered on the feeding sliding plate B4 and the feeding sliding plate A3. An inner cylinder 10 is fixedly installed inside the material cylinder 9. A driving cylinder 8 is movably installed on both the feeding sliding plate A3 and the feeding sliding plate B4. A hinge seat 7 is movably installed on the top of the driving cylinder 8 through a pin. A horizontal frame 6 is fixedly connected to the bottom of the hinge seat 7. A vertical frame 5 is fixedly installed at the end of the horizontal frame 6. Four sets of vertical frames 5 are evenly arranged. The bottom of the vertical frame 5 is screwed and fixed to the side wall of the feeding hopper 2. The bottom sides of the material cylinder 9 are fixed to the feeding hopper 2 through mounting brackets.

[0022] Working Principle: In actual use, when it is necessary to feed material into the EVA kneading mixer 1 through the feeding hopper 2, the material is added into the feeding hopper 2. The external switch of the drive cylinder 8 is activated, and the output shafts of multiple drive cylinders 8 drive the feeding slide plates A3 and B4 to rotate around the mounting shaft 41, causing the feeding slide plates A3 and B4 to open. The material inside the material cylinder 9 can automatically fall into the EVA kneading mixer 1 under gravity, completing the automatic feeding work of the EVA kneading mixer 1. No manual feeding is required, avoiding the risk of burns and dust inhalation caused by hot material splashing from the high-temperature chamber of the sheet kneading device when manually opening the lid for feeding. The operation is simple and efficient, and the cylinder drive achieves automatic control, reducing manual intervention and improving feeding accuracy and consistency. The double slide plate design ensures that the feeding hopper 2 opens evenly, avoiding material blockage or accumulation. The overall structure is compact and reliable, with low maintenance costs, suitable for continuous production needs, and significantly improving the overall working efficiency and safety of the EVA kneading mixer.

[0023] The feeding hopper 2 is equipped with an inner cylinder 10 and six sets of outer cylinders 12. The material can be fed evenly into the feeding hopper 2 through the material cylinder 9. The multi-layered distribution structure of the inner cylinder 10 and outer cylinders 12 ensures that the material falls in a dispersed manner, avoiding local accumulation or segregation and improving the uniformity of feeding. The design of the six sets of outer cylinders 12 expands the feeding coverage area, allowing the material to enter the EVA kneading internal mixer 1 more evenly and improving the mixing efficiency. The overall structure optimizes the material flow path, reduces the risk of blockage, and is suitable for high-precision proportioning and large-scale continuous production needs, further enhancing the stability and reliability of automated feeding.

[0024] In a preferred embodiment, the top opening of the feeding hopper 2 is covered and blocked by the feeding slide plate A3 and the feeding slide plate B4. The feeding slide plate A3 has a triangular receiving opening at its end, and the feeding slide plate B4 is a triangular structure made of plastic. The feeding slide plate A3 and the feeding slide plate B4 are both equipped with mounting shafts 41 at their ends, and the feeding slide plate A3 and the feeding slide plate B4 are movably mounted on the upper side of the inside of the feeding hopper 2 through the mounting shafts 41.

[0025] In a preferred embodiment, the feeding slide plate B4 is adapted to the size of the receiving opening, the feeding slide plate B4 is inserted into the inside of the receiving opening, and there is a gap between the feeding slide plate B4 and the receiving opening.

[0026] In a preferred embodiment, a single set of drive cylinders 8 is installed on the feeding slide plate B4, and two sets of drive cylinders 8 are installed on the feeding slide plate B4. The feeding slide plate B4 and the feeding slide plate B4 are opened and closed synchronously by the drive cylinders 8.

[0027] In a preferred embodiment, the material cylinder 9 is circular and has an inner cylinder 10 inside. The axial cross-section of the inner cylinder 10 and the material cylinder 9 is a concentric circle structure, and six sets of isolation plates 11 are evenly installed between the inner cylinder 10 and the material cylinder 9.

[0028] In a preferred embodiment, an outer cylinder 12 is formed between two adjacent sets of isolation plates 11. The cross-section of the outer cylinder 12 is fan-shaped, and the six sets of outer cylinders 12 are centrally symmetrical about the central axis of the inner cylinder 10.

Claims

1. An EVA sheet kneading device with cylinder-driven sliding plate feeding, comprising an EVA kneading internal mixer (1), characterized in that: The EVA kneading mixer (1) is equipped with a feeding hopper (2) on top. A feeding slide plate A (3) is movably installed on the upper right side of the feeding hopper (2), and a feeding slide plate B (4) is movably installed on the upper left side of the feeding hopper (2). At the same time, a material cylinder (9) is covered on the feeding slide plate B (4) and the feeding slide plate A (3). An inner cylinder (10) is fixedly installed inside the material cylinder (9). A drive cylinder (8) is movably installed on both the feeding slide plate A (3) and the feeding slide plate B (4). A hinge seat (7) is movably installed on the top of the drive cylinder (8) through a pin. A horizontal frame (6) is fixedly connected to the bottom of the hinge seat (7). A vertical frame (5) is fixedly installed at the end of the horizontal frame (6). Four sets of vertical frames (5) are evenly arranged. The bottom of the vertical frame (5) is screwed and fixed to the side wall of the feeding hopper (2). The bottom sides of the material cylinder (9) are fixed to the feeding hopper (2) through mounting brackets.

2. The EVA sheet kneading device with cylinder-driven sliding plate feeding according to claim 1, characterized in that: The top opening of the feeding hopper (2) is covered and blocked by the feeding slide plate A (3) and the feeding slide plate B (4). The feeding slide plate A (3) has a triangular receiving opening at its end, and the feeding slide plate B (4) is a triangular structure made of plastic. The feeding slide plate A (3) and the feeding slide plate B (4) are both equipped with mounting shafts (41). The feeding slide plate A (3) and the feeding slide plate B (4) are movably installed on the upper side of the inside of the feeding hopper (2) through the mounting shafts (41).

3. The EVA sheet kneading device with cylinder-driven sliding plate feeding according to claim 2, characterized in that: The feeding slide plate B(4) is adapted to the size of the receiving port, and the feeding slide plate B(4) is inserted into the inside of the receiving port, with a gap between the feeding slide plate B(4) and the receiving port.

4. The EVA sheet kneading device with cylinder-driven sliding plate feeding according to claim 3, characterized in that: A single set of drive cylinders (8) is installed on the feeding slide plate B (4), and two sets of drive cylinders (8) are installed on the feeding slide plate B (4). The feeding slide plate B (4) and the feeding slide plate B (4) are opened and closed synchronously by the drive cylinders (8).

5. The EVA sheet kneading device with cylinder-driven sliding plate feeding according to claim 1, characterized in that: The material cylinder (9) is circular and has an inner cylinder (10) inside. The axial cross-section of the inner cylinder (10) and the material cylinder (9) is a concentric circle structure. Six sets of isolation plates (11) are evenly installed between the inner cylinder (10) and the material cylinder (9).

6. The EVA sheet kneading device with cylinder-driven sliding plate feeding according to claim 5, characterized in that: An outer cylinder (12) is formed between two adjacent sets of isolation plates (11). The cross-section of the outer cylinder (12) is fan-shaped. The six sets of outer cylinders (12) are centrally symmetrical about the central axis of the inner cylinder (10).

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