Plastic hot melting spreading extrusion film forming mechanism

Abstract

The invention relates to the technical field of plastic film production, in particular to a plastic hot melting spreading extrusion film-forming mechanism which comprises a processing frame, a liquid dropping box and a feeding box are fixedly connected to the processing frame, the feeding box is connected with the liquid dropping box through a plurality of flow dividing pipes, a plurality of liquid dropping holes are formed in the bottom of the liquid dropping box, and the flow dividing pipes are connected with the liquid dropping box through a plurality of flow dividing pipes. The lower surface of the liquid dropping box is fixedly connected with two spreading plates which are obliquely arranged; the device comprises a processing frame, two rotating cylinders are rotatably mounted on the processing frame, a mounting plate is slidably connected to the processing frame, two fixed cylinders are rotatably mounted on the mounting plate, an extrusion assembly is arranged between each rotating cylinder and the corresponding fixed cylinder, and each extrusion assembly comprises a rotating shaft arranged between the corresponding rotating cylinder and the corresponding fixed cylinder. According to the plastic film forming device, the roller can be conveniently taken down to be cleaned, so that some pits in a formed film material can be avoided, the attractiveness of a plastic film can be guaranteed, and production of the plastic film is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of plastic film production, in particular to a plastic hot-melt extrusion film-forming mechanism. Background Art

[0002] With the continuous development of society and the continuous advancement of science and technology, the technologies related to the production of plastic films are also constantly improving. The production and preparation of plastic films require that plastic debris or plastic particles be fully mixed as raw materials. After mixing, they are extruded and heated to liquid by a screw crushing compressor, and then the liquid plastic is extruded into sheets by rollers and cooled and formed simultaneously. In order to ensure that the prepared plastic film has high-quality performance, the raw materials need to be spread relatively evenly in a linear shape and dripped between the two rollers for extrusion, cooling and forming after being extruded and heated to liquid by a screw crushing compressor.

[0003] The currently used plastic hot melt extrusion film-forming mechanism has a roller on top that can extrude liquid raw materials. The extruded raw materials will be cooled and formed into film materials. However, after long-term use, some raw materials or impurities are likely to remain on the surface of the roller, making it inconvenient to remove the roller for cleaning. When the roller containing impurities subsequently extrude the raw materials, it is easy to cause some dents in the formed film material, which reduces the aesthetics of the plastic film and is not conducive to the production of plastic film. Summary of the invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art: after a long period of use, some raw materials are likely to remain on the surface of the roller or some impurities are likely to adhere to it, making it inconvenient to remove the roller for cleaning; when the roller containing impurities subsequently extrude the raw materials, it is likely to cause some depressions in the formed film material, resulting in a decrease in the aesthetics of the plastic film, which is not conducive to the production of plastic film. A plastic hot melt extrusion film-forming mechanism is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A plastic hot melt spreading extrusion film forming mechanism, comprising a processing frame, a dripping box and a feed box are fixedly connected to the processing frame, the feed box is connected to the dripping box through a plurality of shunt pipes, a plurality of dripping holes are opened at the bottom of the dripping box, and two inclined spreading plates are fixedly connected to the lower surface of the dripping box; Two rotating cylinders are rotatably mounted on the processing frame, a mounting plate is slidably connected to the processing frame, two fixed cylinders are rotatably mounted on the mounting plate, an extrusion assembly is arranged between each rotating cylinder and the corresponding fixed cylinder, the extrusion assembly comprises a rotating shaft arranged between the rotating cylinder and the fixed cylinder, and a roller is fixedly connected to the rotating shaft; A clamping assembly is provided on each of the rotating cylinders, and the clamping assembly includes a plurality of clamping plates slidably mounted on the rotating cylinder, the cross-section of each clamping plate is T-shaped, and the plurality of clamping plates are arranged in a circular array, and a rubber pad is fixedly connected to one side surface of each clamping plate.

[0006] Preferably, one end of each rotating cylinder is fixedly connected to a first annular plate, the outer sliding sleeve of the rotating cylinder is provided with a second annular plate, one side surface of the second annular plate is fixedly connected to a plurality of extrusion blocks arranged in a ring array, each of the extrusion blocks is provided with an opening with a right-angled trapezoidal cross-section, and one end of each clamping plate away from the rotating shaft is fitted with an inclined surface corresponding to the opening.

[0007] Preferably, each of the clamping plates is sleeved with a first spring, one end of the first spring is fixedly connected to the clamping plate, and the other end of the first spring is fixedly connected to the inner wall of the rotating cylinder.

[0008] Preferably, one side surface of each of the second circular ring plates is fixedly connected to a rectangular block, the rectangular block and the first circular ring plate are slidably connected, one side surface of each of the first circular ring plates is fixedly connected to a limiting plate, a clamping rod is slidably connected in the rectangular block, and the limiting plate is provided with a plurality of clamping grooves for connecting the clamping rod.

[0009] Preferably, each of the rectangular blocks is provided with an installation cavity, an inner wall of one side of the installation cavity is provided with a limiting groove, a slide plate is slidably connected in the limiting groove, and the slide plate is connected to the clamping rod through a hinge rod.

[0010] Preferably, a pull rod is fixedly connected to one side of each of the slide plates, the pull rod is slidably connected to the rectangular block, a second spring is sleeved on the pull rod, one end of the second spring is fixedly connected to the pull rod, and the other end of the second spring is fixedly connected to the inner wall of the installation cavity.

[0011] Preferably, a rubber ring is fixedly connected to one side surface of each rectangular block, and the rubber ring is sleeved on the outside of the pull rod.

[0012] Preferably, the processing frame is provided with two slide grooves for the mounting plate to move forward and backward, and a threaded rod is threadedly connected to the processing frame, and one end of the threaded rod is rotatably connected to the mounting plate.

[0013] Preferably, a feed pipe is fixedly connected to one side of the feed box, a solenoid valve is provided on the feed pipe, a hydraulic cylinder is fixedly installed on the processing frame, a pressure plate is fixedly connected to the driving end of the hydraulic cylinder, and the pressure plate is slidably arranged inside the feed box.

[0014] Preferably, a clamping groove is provided in each of the fixing tubes, and the cross-sections of the clamping groove and the fixing tube are both isosceles trapezoidal in shape, and the surface of the rotating shaft fits the inner wall of the clamping groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By rotating the threaded rod, the fixed cylinder and the mounting plate can be moved together, and the fixed cylinder can be separated from the rotating shaft. Then, the rectangular block can be moved to simultaneously move the second annular plate and the plurality of extrusion blocks, and each rubber pad can be separated from the surface of the rotating shaft. Then, one end of the rotating shaft can be taken out from the inside of the rotating cylinder, that is, the roller can be taken out. When the roller has some raw materials or impurities adhering to its surface after long-term use, it is convenient to remove the roller for cleaning, thereby avoiding some depressions in the film material after molding, which is beneficial to ensuring the aesthetics of the plastic film and facilitating the production of the plastic film. The solenoid valve is closed, and the liquid raw material cannot flow through the feed pipe, that is, the liquid raw material cannot be discharged from the feed pipe. Then the hydraulic cylinder drives the pressure plate to move downward. The pressure plate has good sealing when connected to the inside of the feed box. During the downward movement of the pressure plate, the liquid raw material inside the feed box can be pressurized, which is beneficial to increase the flow rate of the liquid raw material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front structural schematic diagram of a plastic hot melt extrusion film-forming mechanism proposed by the present invention; Figure 2 A schematic diagram of the top view of a plastic hot melt extrusion film forming mechanism proposed by the present invention; Figure 3 This is a bottom-up structural schematic diagram of a plastic hot-melt extrusion film-forming mechanism proposed by the present invention; Figure 4 It is a schematic diagram of the side structure of the roller and the rotating drum in the present invention; Figure 5 It is a front structural schematic diagram of the first annular plate and the clamping plate in the present invention; Figure 6 It is a schematic diagram of a partial structure of a rotating cylinder and a rectangular block in a top view in the present invention; Figure 7 for Figure 6 Schematic diagram of the locally enlarged structure of A in the middle.

[0017] In the figure: 1 processing frame, 2 rollers, 3 spreading plate, 4 drip box, 5 diversion pipe, 6 feed box, 7 feed pipe, 8 hydraulic cylinder, 9 pressure plate, 10 slide groove, 11 mounting plate, 12 threaded rod, 13 fixed cylinder, 14 drip hole, 15 rotating shaft, 16 first circular plate, 17 rotating cylinder, 18 extrusion block, 19 clamping plate, 20 rubber pad, 21 first spring, 22 limit plate, 23 pull rod, 24 rectangular block, 25 second circular plate, 26 opening, 27 slide plate, 28 rubber ring, 29 second spring, 30 clamping rod, 31 mounting cavity, 32 hinge rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 7 A plastic hot melt spreading extrusion film forming mechanism includes a processing frame 1, a dripping box 4 and a feed box 6 are fixedly connected to the processing frame 1, the feed box 6 is connected to the dripping box 4 through multiple shunt pipes 5, a plurality of dripping holes 14 are provided at the bottom of the dripping box 4, and two inclined spreading plates 3 are fixedly connected to the lower surface of the dripping box 4. The spreading plates 3 have good thermal insulation effect and can be electrically heated. Two rotating cylinders 17 are rotatably installed on the processing frame 1, a mounting plate 11 is slidably connected to the processing frame 1, and two fixed cylinders 13 are rotatably installed on the mounting plate 11. An extrusion assembly is arranged between each rotating cylinder 17 and the corresponding fixed cylinder 13, and the extrusion assembly includes a rotating shaft 15 arranged between the rotating cylinder 17 and the fixed cylinder 13, and a roller 2 is fixedly connected to the rotating shaft 15.

[0020] A clamping assembly is provided on each rotating cylinder 17, and the clamping assembly includes a plurality of clamping plates 19 slidably mounted on the rotating cylinder 17, the cross section of each clamping plate 19 is T-shaped, and the plurality of clamping plates 19 are arranged in a ring array, and a rubber pad 20 is fixedly connected to one side surface of each clamping plate 19, and a first annular plate 16 is fixedly connected to one end of each rotating cylinder 17, and a second annular plate 25 is provided on the outer sliding sleeve of the rotating cylinder 17, and a plurality of extrusion blocks 18 arranged in a ring array are fixedly connected to one side surface of the second annular plate 25, and each extrusion block 18 is provided with an opening 26 with a right-angled trapezoidal cross section, and one end of each clamping plate 19 away from the rotating shaft 15 is fitted with the inclined surface of the corresponding opening 26.

[0021] Each clamping plate 19 is sleeved with a first spring 21, one end of the first spring 21 is fixedly connected to the clamping plate 19, and the other end of the first spring 21 is fixedly connected to the inner wall of the rotating cylinder 17. One end of the rotating shaft 15 is inserted into the interior of the rotating cylinder 17, and then the rectangular block 24 is pushed to make it slide relative to the first circular ring plate 16. Under the transmission action of the second circular ring plate 25, multiple extrusion blocks 18 will move along the rotating cylinder 17 at the same time. In this process, the inclined surfaces of each opening 26 will move against the end faces of the corresponding clamping plates 19, thereby making each clamping plate 19 slide relative to the rotating cylinder 17 at the same time, the first spring 21 is deformed, and each clamping plate 19 moves to a position close to the middle of the rotating cylinder 17 until the rubber pads 20 on the surface of each clamping plate 19 are in close contact with the surface of the rotating shaft 15, and multiple rubber pads 20 are respectively in contact with the side surfaces of the rotating shaft 15, so that the rotating shaft 15 can be firmly clamped.

[0022] A rectangular block 24 is fixedly connected to one side surface of each second circular ring plate 25, and the rectangular block 24 is slidably connected to the first circular ring plate 16. A limiting plate 22 is fixedly connected to one side surface of each first circular ring plate 16. A clamping rod 30 is slidably connected in the rectangular block 24. The limiting plate 22 is provided with a plurality of clamping grooves for connecting the clamping rod 30. An installation cavity 31 is provided in each rectangular block 24, and a limiting groove is provided on the inner wall of one side of the installation cavity 31. A slide plate 27 is slidably connected in the limiting groove. The slide plate 27 is connected to the clamping rod 30 through a hinged rod 32. A pull rod 23 is fixedly connected to one side of the slide plate 27, and the pull rod 23 and the rectangular block 24 are slidably connected.

[0023] A second spring 29 is sleeved on the pull rod 23, one end of the second spring 29 is fixedly connected to the pull rod 23, and the other end of the second spring 29 is fixedly connected to the inner wall of the installation cavity 31. When the external force applied to the pull rod 23 is removed, the pull rod 23 will shrink toward the inside of the installation cavity 31 under the elastic force of the second spring 29, and the slide plate 27 slides inside the installation cavity 31 at the same time. Since one end of the hinged rod 32 is hinged to the slide plate 27 and the other end is hinged to the clamping rod 30, the inclination angle of the hinged rod 32 will change, and the clamping rod 30 will slide relative to the rectangular block 24 at the same time. After one end of the clamping rod 30 slides, it will be clamped with the corresponding clamping groove. After that, the rectangular block 24 cannot slide relative to the first circular plate 16, that is, the second circular plate 25 cannot slide relative to the rotating cylinder 17.

[0024] A rubber ring 28 is fixedly connected to the surface of one side of each rectangular block 24, and the rubber ring 28 is sleeved on the outside of the pull rod 23. The rubber ring 28 is sleeved on the outside of the pull rod 23 and fits the surface of the pull rod 23. The friction between the rubber ring 28 and the pull rod 23 is relatively large, which can effectively prevent the pull rod 23 from moving randomly. Two slide grooves 10 for moving the mounting plate 11 back and forth are provided on the processing frame 1. A threaded rod 12 is threadedly connected to the processing frame 1, and one end of the threaded rod 12 is rotatably connected to the mounting plate 11. A clamping groove is provided in each fixed cylinder 13, and the cross-sections of the clamping groove and the fixed cylinder 13 are both isosceles trapezoidal, and the surface of the rotating shaft 15 fits the inner wall of the clamping groove.

[0025] When the threaded rod 12 is rotated and the threaded rod 12 is threadedly connected to the processing frame 1, the mounting plate 11 will slide relative to the processing frame 1, and the fixed cylinder 13 will be sleeved on the outer side of the rotating shaft 15 after moving with the mounting plate 11, until the inner wall of the clamping groove is in close contact with the surface of the rotating shaft 15. Under the joint limiting action of the rotating cylinder 17 and the fixed cylinder 13, the rotating shaft 15 and the roller 2 can be prevented from being separated from the processing frame 1. A feeding pipe 7 is fixedly connected to one side of the feed box 6, and a solenoid valve is arranged on the feed pipe 7. A hydraulic cylinder 8 is fixedly installed on the processing frame 1, and a driving end of the hydraulic cylinder 8 is fixedly connected to a pressing plate 9, which is slidably arranged inside the feed box 6. The solenoid valve is closed, and then the hydraulic cylinder 8 drives the pressing plate 9 to move downward. The sealing performance when the pressing plate 9 is connected to the inside of the feed box 6 is good. During the downward movement of the pressing plate 9, the liquid raw material inside the feed box 6 can be pressurized, which is beneficial to increase the flow rate of the liquid raw material.

[0026] In the present invention, when in use, first pull the pull rod 23, then insert one end of the rotating shaft 15 into the interior of the rotating cylinder 17, and then push the rectangular block 24 to make it slide relative to the first circular ring plate 16. Under the transmission action of the second circular ring plate 25, multiple extrusion blocks 18 will move along the rotating cylinder 17 at the same time. During this process, the inclined surfaces of each opening 26 will move against the end faces of the corresponding clamping plates 19, so that each clamping plate 19 will slide relative to the rotating cylinder 17 at the same time, the first spring 21 will be deformed, and each clamping plate 19 will move to a position close to the middle of the rotating cylinder 17 until the rubber pads 20 on the surface of each clamping plate 19 are tightly attached to the surface of the rotating shaft 15, and multiple rubber pads 20 are respectively attached to the side surfaces of the rotating shaft 15, so that the rotating shaft 15 can be firmly clamped.

[0027] After that, the external force applied to the pull rod 23 is removed. Under the elastic force of the second spring 29, the pull rod 23 will shrink toward the inside of the installation cavity 31, and the slide plate 27 will slide inside the installation cavity 31 at the same time. Since one end of the hinged rod 32 is hinged to the slide plate 27 and the other end is hinged to the clamping rod 30, the inclination angle of the hinged rod 32 will change, and the clamping rod 30 will slide relative to the rectangular block 24 at the same time. After sliding, one end of the clamping rod 30 will be clamped with the corresponding clamping groove (not shown), and then the threaded rod 12 is rotated. During the process of threaded connection between the threaded rod 12 and the processing frame 1, since one end of the threaded rod 12 is rotatably connected to the mounting plate 11 and cannot be connected to the mounting plate 11, the threaded rod 12 is connected to the processing frame 1. When the mounting plate 11 is detached, the mounting plate 11 will slide relative to the processing frame 1, and the fixed cylinder 13 will be sleeved on the outer side of the rotating shaft 15 after moving with the mounting plate 11, until the inner wall of the clamping groove is in close contact with the surface of the rotating shaft 15. Under the joint limiting action of the rotating cylinder 17 and the fixed cylinder 13, the rotating shaft 15 and the roller 2 can be prevented from being detached from the processing frame 1. Similarly, when some raw materials remain on the surface of the roller 2 or some impurities adhere to it due to long-term use, it is convenient to remove the roller 2 for cleaning, thereby avoiding some depressions in the film material after molding, which is beneficial to ensuring the aesthetics of the plastic film and facilitating the production of the plastic film.

[0028] Liquid raw materials can be added to the interior of the feed box 6 through the feed pipe 7. Since one end of each branch pipe 5 is fixedly connected to the feed box 6 and the other end is fixedly connected to the drip box 4, the liquid raw material will flow into the drip box 4 through the branch pipe 5 and be discharged through multiple drip holes 14. The liquid raw material will be pre-gathered on a spreading board 3 and then flow to the spreading board 3 on the other side. The two spreading boards 3 will gather the liquid raw material together. The hydraulic raw material will flow into between the two rollers 2 in a waterfall shape. After being squeezed by the rollers 2, it will be cooled and shaped into a film material. The solenoid valve is closed, and then the hydraulic cylinder 8 drives the pressing plate 9 to move downward. The sealing performance when the pressing plate 9 is connected to the inside of the feed box 6 is good. During the downward movement of the pressing plate 9, the liquid raw material inside the feed box 6 can be pressurized, which is beneficial to increase the flow rate of the liquid raw material.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic hot melt extrusion film forming mechanism, comprising a processing frame (1), characterized in that: The processing frame (1) is fixedly connected to a dripping box (4) and a feed box (6); the feed box (6) is connected to the dripping box (4) via a plurality of shunt pipes (5); a plurality of dripping holes (14) are provided at the bottom of the dripping box (4); and two inclined spreading plates (3) are fixedly connected to the lower surface of the dripping box (4); Two rotating cylinders (17) are rotatably mounted on the processing frame (1), a mounting plate (11) is slidably connected to the processing frame (1), two fixed cylinders (13) are rotatably mounted on the mounting plate (11), an extrusion assembly is arranged between each rotating cylinder (17) and the corresponding fixed cylinder (13), the extrusion assembly comprises a rotating shaft (15) arranged between the rotating cylinder (17) and the fixed cylinder (13), and a roller (2) is fixedly connected to the rotating shaft (15); Each of the rotating cylinders (17) is provided with a clamping assembly, the clamping assembly comprising a plurality of clamping plates (19) slidably mounted on the rotating cylinder (17), the cross section of each clamping plate (19) being arranged in a T-shape, the plurality of clamping plates (19) being arranged in a ring array, and a rubber pad (20) being fixedly connected to a surface of one side of each clamping plate (19).

2. A plastic hot melt extrusion film forming mechanism according to claim 1, characterized in that: One end of each rotating cylinder (17) is fixedly connected to a first annular plate (16); a second annular plate (25) is provided on the outer sliding sleeve of the rotating cylinder (17); a plurality of extrusion blocks (18) arranged in a ring array are fixedly connected to one side surface of the second annular plate (25); each extrusion block (18) is provided with an opening (26) having a right-angle trapezoidal cross section; and one end of each clamping plate (19) away from the rotating shaft (15) is in contact with an inclined surface corresponding to the opening (26).

3. A plastic hot melt extrusion film forming mechanism according to claim 1, characterized in that: A first spring (21) is sleeved on each of the clamping plates (19); one end of the first spring (21) is fixedly connected to the clamping plate (19), and the other end of the first spring (21) is fixedly connected to the inner wall of the rotating cylinder (17).

4. A plastic hot melt extrusion film forming mechanism according to claim 2, characterized in that: A rectangular block (24) is fixedly connected to one side surface of each second circular plate (25), the rectangular block (24) and the first circular plate (16) are slidably connected, a limiting plate (22) is fixedly connected to one side surface of each first circular plate (16), a clamping rod (30) is slidably connected inside the rectangular block (24), and a plurality of clamping grooves for connecting the clamping rod (30) are provided on the limiting plate (22).

5. A plastic hot melt extrusion film forming mechanism according to claim 4, characterized in that: Each rectangular block (24) is provided with a mounting cavity (31), and a limiting groove is provided on an inner wall of one side of the mounting cavity (31). A slide plate (27) is slidably connected in the limiting groove, and the slide plate (27) is connected to the clamping rod (30) via a hinge rod (32).

6. A plastic hot melt extrusion film forming mechanism according to claim 5, characterized in that: A pull rod (23) is fixedly connected to one side of each slide plate (27), the pull rod (23) and the rectangular block (24) are slidably connected, a second spring (29) is sleeved on the pull rod (23), one end of the second spring (29) is fixedly connected to the pull rod (23), and the other end of the second spring (29) is fixedly connected to the inner wall of the installation cavity (31).

7. A plastic hot melt extrusion film forming mechanism according to claim 6, characterized in that: A rubber ring (28) is fixedly connected to one side surface of each rectangular block (24), and the rubber ring (28) is sleeved on the outside of the pull rod (23).

8. The plastic hot melt extrusion film forming mechanism according to claim 1, characterized in that: The processing frame (1) is provided with two slide grooves (10) for the mounting plate (11) to move forward and backward. A threaded rod (12) is threadedly connected to the processing frame (1), and one end of the threaded rod (12) is rotatably connected to the mounting plate (11).

9. A plastic hot melt extrusion film forming mechanism according to claim 1, characterized in that: A feed pipe (7) is fixedly connected to one side of the feed box (6), and a solenoid valve is provided on the feed pipe (7). A hydraulic cylinder (8) is fixedly installed on the processing frame (1), and a pressure plate (9) is fixedly connected to the driving end of the hydraulic cylinder (8), and the pressure plate (9) is slidably arranged inside the feed box (6).

10. A plastic hot melt extrusion film forming mechanism according to claim 1, characterized in that: A clamping groove is provided in each of the fixed cylinders (13); the cross-sections of the clamping groove and the fixed cylinder (13) are both isosceles trapezoidal; the surface of the rotating shaft (15) fits the inner wall of the clamping groove.

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