Single-screw extruder for processing EVA (Ethylene Vinyl Acetate) adhesive film

Abstract

The utility model discloses a single screw extruder for EVA (Ethylene Vinyl Acetate) adhesive film processing, which relates to the technical field of EVA adhesive film processing and comprises a bearing seat and an extruder cylinder, a servo motor is arranged on the left side wall of the extruder cylinder, the output end of the servo motor is connected with a driving rod, a spiral blade is arranged on the outer wall of the driving rod, an extrusion die head is arranged on the right side wall of the extruder cylinder, and a screw rod is arranged on the outer wall of the extrusion die head. The left end of the top of the extruder barrel is provided with a communicating feeding hopper, the top of the extruder barrel is provided with a communicating opening, a sealing top plate is slidably connected into the opening, the outer wall of the rear side of the extruder barrel is provided with a fixing frame, the fixing frame is provided with an adjusting part for driving the sealing top plate to move, and the front end of the outer wall of the extruder barrel is connected with a top frame. And a pressing assembly for pressing the top sealing plate is arranged in the top frame. The adjusting component can drive the sealing top plate to move, the top of the single-screw extruder for EVA adhesive film processing can be opened, workers can conveniently clean residual raw materials in the later period, and the sealing performance of connection between the sealing top plate and the extruder barrel is improved through the pressing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of EVA film processing, in particular to a single-screw extruder for EVA film processing. Background Technique

[0002] EVA film is a commonly used plastic film, mainly made of ethylene-vinyl acetate copolymer (EVA). When processing EVA film, a single-screw extruder is required. The screw rotates in the barrel, and the material is continuously pushed and compacted. Under the action of strong shear, friction and external heaters, it gradually melts and is extruded from the head with a certain pressure and flow rate.

[0003] Most of the existing single-screw extruders for EVA film processing are of a sealed cylindrical structure. After being used for a period of time, a lot of raw materials will remain inside the extruder. The sealed extruder is not convenient to open, which is not conducive to the staff cleaning the remaining raw materials later. The raw materials remaining in the extruder affect the quality of the subsequent EVA film products. Therefore, we propose a single-screw extruder for EVA film processing. Content of the Utility Model

[0004] The purpose of the utility model is to provide a single-screw extruder for EVA film processing, so as to solve the problem that the sealed extruder is not convenient for the staff to clean the remaining raw materials later, which in turn affects the quality of the subsequent EVA film products as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A single-screw extruder for EVA film processing includes a bearing seat. An extruder barrel is provided on the bearing seat. A servo motor is installed on the left side wall of the extruder barrel. The output end of the servo motor is connected to a driving rod. A spiral blade is provided on the outer wall of the driving rod. An extrusion die head is installed on the right side wall of the extruder barrel. A feeding hopper with a connected setting is provided at the left end of the top of the extruder barrel. An opening with a connected setting is opened at the top of the extruder barrel. A sealing top plate is slidably connected in the opening. A fixing frame is installed on the rear outer wall of the extruder barrel. An adjusting component for driving the sealing top plate to move is provided on the fixing frame;

[0007] The front end of the outer wall of the extruder barrel is connected to a top frame, and a pressing component for pressing the sealing top plate is provided in the top frame.

[0008] Further: The adjusting component includes a stepping motor. The stepping motor is located on the rear side wall of the fixing frame. The output end of the stepping motor is connected to a lead screw. The other end of the lead screw is rotatably connected to the outer wall of the extruder barrel through a bearing.

[0009] Further: A threaded block is threadedly connected to the lead screw, and a connecting member is installed on the top of the threaded block. The top of the connecting member is connected to the lower surface of the sealing top plate. A chute is provided on the fixing frame, and a slider is slidably connected in the chute. The top of the slider is connected to the bottom of the threaded block.

[0010] Further: The pressing assembly includes a vertical slide bar vertically slidably connected in the top frame, and a pressing plate is installed at the bottom of the vertical slide bar. A compression spring is sleeved on the outer wall of the vertical slide bar, and the compression spring is located between the pressing plate and the top frame.

[0011] Further: A pull ring is installed at the top of the vertical slide bar, and an anti-slip rubber sleeve is sleeved on the hand-held end of the pull ring.

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

[0013] By adjusting the operation of the stepping motor on the adjusting component, the present utility model can drive the lead screw to rotate. After the threaded block threadedly connected to the lead screw is slidably limited by the chute and the slider, the connecting member can drive the sealing top plate to move, and the top of the single-screw extruder for processing EVA film can be opened, which is convenient for the staff to clean the residual raw materials later and improves the quality of the subsequent EVA film finished product; through the sliding of the vertical slide bar of the pressing assembly on the top frame and the elasticity of the compression spring, the pressing plate can press down the sealing top plate, so that the sealing top plate is closely attached to the extruder barrel, improving the sealing performance of the connection between the sealing top plate and the extruder barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the other side of the present utility model;

[0016] Figure 3 is of the present utility model Figure 2 enlarged schematic structural diagram at A in;

[0017] Figure 4 is a schematic cross-sectional view of the front structure of the extruder barrel of the present utility model.

[0018] In the figure: 1, bearing seat; 2, extruder barrel; 3, servo motor; 4, extrusion die head; 5, feeding hopper; 6, sealing top plate; 7, top frame; 8, vertical slide bar; 9, pressing plate; 10, compression spring; 11, fixing frame; 12, stepping motor; 13, lead screw; 14, threaded block; 15, chute; 16, slider; 17, connecting member; 18, drive rod; 19, spiral blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment 1:

[0021] Please refer to Figures 1-4 , the present utility model provides a technical solution: a single-screw extruder for EVA film processing, including a carrier base 1, an extruder barrel 2 is provided on the carrier base 1, and a servo motor 3 is installed on the left side wall of the extruder barrel 2. The output end of the servo motor 3 is connected to a driving rod 18. A spiral blade 19 is provided on the outer wall of the driving rod 18, and an extrusion die head 4 is installed on the right side wall of the extruder barrel 2. A feeding hopper 5 is provided at the left end of the top of the extruder barrel 2 and is connected in a communicating manner, and an opening is provided at the top of the extruder barrel 2 and is connected in a communicating manner. A sealing top plate 6 is slidably connected in the opening. A fixing frame 11 is installed on the rear outer wall of the extruder barrel 2, and an adjusting component for driving the sealing top plate 6 to move is provided on the fixing frame 11; before use, the electrical ends of each electrical device are electrically connected to an external power supply and the electrical end of a controller. When processing EVA film, the raw materials are poured into the interior of the extruder barrel 2 from the feeding hopper 5. The operation of the servo motor 3 can drive the driving rod 18 to rotate, causing the spiral blade 19 to operate, conveying the raw materials, so that the raw materials are extruded to one end of the extruder housing and are extruded into a shape after heating; when heating and extruding the raw materials into a shape, the sealing top plate 6 is installed on the top of the extruder barrel 2 to seal it. When it is necessary to clean the remaining raw materials, through the operation of the adjusting component on the fixing frame 11, the sealing top plate 6 can be driven to move, opening the top of the single-screw extruder for EVA film processing, facilitating the staff to clean the remaining raw materials later and improving the quality of the subsequent EVA film finished product;

[0022] The front end of the outer wall of the extruder barrel 2 is connected to a top frame 7, and a pressing component for pressing the sealing top plate 6 is provided in the top frame 7; the pressing component can make the sealing top plate 6 closely fit on the extruder barrel 2 (during operation), improving the sealing performance of the connection between the sealing top plate 6 and the extruder barrel 2.

[0023] Among them, preferably, the adjusting component includes a stepping motor 12. The stepping motor 12 is located on the rear side wall of the fixing frame 11, and the output end of the stepping motor 12 is connected to a lead screw 13. The other end of the lead screw 13 is rotatably connected to the outer wall of the extruder barrel 2 through a bearing; the fixing frame 11 is fixedly connected to the rear outer wall of the extruder barrel 2, and the operation of the stepping motor 12 can drive the lead screw 13 to rotate forward or backward.

[0024] Preferably, a threaded block 14 is threadedly connected to the lead screw 13, and a connecting member 17 is installed on the top of the threaded block 14. The top of the connecting member 17 is connected to the lower surface of the sealing top plate 6. A chute 15 is formed on the fixing frame 11, and a slider 16 is slidably connected in the chute 15. The top of the slider 16 is connected to the bottom of the threaded block 14; the threaded block 14 is fixedly connected to the slider 16 and the connecting member 17, the connecting member 17 is fixedly connected to the sealing top plate 6, and the cross-sections of the chute 15 and the slider 16 are both T-shaped. After the threaded block 14 threadedly connected to the lead screw 13 is slidably limited by the chute 15 and the slider 16, the connecting member 17 can move back and forth, that is, drive the sealing top plate 6 to move, and the top of the single-screw extruder for processing EVA film can be opened or closed.

[0025] Preferably, the pressing assembly includes a vertical slide bar 8 slidably connected vertically in the top frame 7, and a pressing plate 9 is installed at the bottom of the vertical slide bar 8. A compression spring 10 is sleeved on the outer wall of the vertical slide bar 8, and the compression spring 10 is located between the pressing plate 9 and the top frame 7; the bottom of the vertical slide bar 8 is fixedly connected to the pressing plate 9. Through the elasticity of the compression spring 10, the pressing plate 9 can always maintain a downward movement trend, so that the pressing plate 9 tightly presses the sealing top plate 6. When the sealing top plate 6 is opened, the vertical slide bar 8 slides upward, so that the pressing plate 9 moves away from the sealing top plate 6, and the sealing top plate 6 can move smoothly after being released from the force.

[0026] Embodiment 2:

[0027] Referring to Figure 2 , what is different about this embodiment from the first embodiment is that a pull ring is installed at the top of the vertical slide bar 8, and an anti-slip rubber sleeve is sleeved on the hand-held end of the pull ring; the pull ring facilitates the staff to pull the vertical slide bar 8, and the anti-slip rubber sleeve plays an anti-slip role to prevent the hand from slipping off when holding the pull ring.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single screw extruder for processing EVA film, comprising a bearing seat (1), an extruder barrel (2) being arranged on the bearing seat (1), and a servo motor (3) being installed on the left side wall of the extruder barrel (2), an output end of the servo motor (3) being connected to a drive rod (18), an outer wall of the drive rod (18) being provided with a spiral blade (19), and an extrusion die head (4) being installed on the right side wall of the extruder barrel (2), characterized in that: A feeding hopper (5) is provided at the left end of the top of the extruder barrel (2) and a connecting opening is provided at the top of the extruder barrel (2), a sealing top plate (6) is slidably connected in the opening, a fixing frame (11) is installed on the rear outer wall of the extruder barrel (2), and an adjusting component for driving the sealing top plate (6) to move is provided on the fixing frame (11); The front end of the outer wall of the extruder barrel (2) is connected to a top frame (7), and a clamping component for clamping and sealing the top plate (6) is arranged inside the top frame (7).

2. The single screw extruder for EVA film processing according to claim 1, characterized in that: The adjusting component comprises a stepping motor (12), the stepping motor (12) is located on the rear side wall of the fixing frame (11), and the output end of the stepping motor (12) is connected to a screw rod (13), and the other end of the screw rod (13) is rotatably connected to the outer wall of the extruder barrel (2) through a bearing.

3. A single screw extruder for EVA film processing according to claim 2, characterized in that: The screw rod (13) is threadedly connected to a threaded block (14), and a connecting piece (17) is installed on the top of the threaded block (14), and the top of the connecting piece (17) is connected to the lower surface of the sealing top plate (6).

4. A single screw extruder for EVA film processing according to claim 3, characterized in that: The fixing frame (11) is provided with a sliding groove (15), and a sliding block (16) is slidably connected in the sliding groove (15), and the top of the sliding block (16) is connected to the bottom of the threaded block (14).

5. The single screw extruder for EVA film processing according to claim 1, characterized in that: The clamping assembly comprises a vertical sliding rod (8) vertically slidably connected in the top frame (7), and a clamping plate (9) is installed at the bottom of the vertical sliding rod (8).

6. A single screw extruder for EVA film processing according to claim 5, characterized in that: The outer wall of the vertical sliding rod (8) is sleeved with a compression spring (10), and the compression spring (10) is located between the pressing plate (9) and the top frame (7).

7. The single screw extruder for EVA film processing according to claim 5, characterized in that: A pull ring is installed on the top of the vertical sliding rod (8), and the handheld end of the pull ring is covered with an anti-slip rubber sleeve.

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