Extrusion mechanism for cast film production

Abstract

The utility model discloses an extrusion mechanism for cast film production, and particularly relates to the technical field of cast film extrusion, the extrusion mechanism comprises a containing barrel, the bottom of the containing barrel is fixedly communicated with a discharge pipe, the bottom of the discharge pipe is provided with an extrusion mechanism for performing extrusion molding on molten raw materials, one side of the containing barrel is fixedly communicated with a feed chute, and the feed chute is provided with a discharge port. And a pushing-out mechanism for pushing the fused raw materials out of the containing barrel is arranged in the containing barrel, a heat preservation cover is arranged outside the containing barrel, a plurality of heating pipes are arranged in the heat preservation cover, and a switch valve is fixedly arranged outside the discharging pipe. Melted raw materials adhering to the inner wall of the containing barrel can be cleaned through the pushing plate, waste is avoided, films with different widths can be produced through the extrusion mechanism, and the practicability of the film forming device is improved.

Description

Technical Field

[0001] This utility model relates to the field of cast film extrusion technology, specifically to an extrusion mechanism for cast film production. Background Technology

[0002] The extrusion mechanism for cast film production is the core equipment in the cast film production process. It is mainly responsible for heating and melting plastic granules and pushing the molten material into the flow channel through a screw. As shown in Chinese patent application No. 202320288242.X, this technical solution transports the molten raw material into the extrusion box body through the discharge pipe and the guide pipe for the next step of extruding plastic film. The heating pipe is equipped with a heating wire, which is connected to an external power source to dissipate high temperature and heat the guide pipe. This effectively prevents the molten raw material from losing heat and hardening during transportation, avoids blockage of the guide pipe, and ensures smooth material transportation.

[0003] However, the following problem still exists in this technical solution: the molten raw material is easy to adhere to the inside of the casting mechanism, and the device does not clean it, resulting in waste of the molten raw material. Utility Model Content

[0004] The purpose of this invention is to provide an extrusion mechanism for casting film production. The pusher plate can clean the molten raw materials that adhere to the inner wall of the container, thus avoiding waste. The extrusion mechanism can also produce films of different widths, expanding the applicability of this invention and solving the above-mentioned shortcomings in the technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extrusion mechanism for casting film production, comprising a container, a discharge pipe fixedly connected to the bottom of the container, an extrusion mechanism for extruding molten raw materials at the bottom of the discharge pipe, a feed trough fixedly connected to one side of the container, an ejection mechanism for pushing molten raw materials out of the container inside the container, a heat insulation cover outside the container, multiple heating tubes inside the heat insulation cover, and a switch valve fixedly connected to the outside of the discharge pipe.

[0006] Preferably, the ejection mechanism includes a push plate disposed inside the container, a baffle plate is provided on the top of the container, threaded cylinders are provided through both sides of the baffle plate, the threaded cylinders are movably connected to the baffle plate by bearings, a threaded rod is threadedly connected inside the threaded cylinder, and the bottom end of the threaded rod is fixedly connected to the top of the push plate, for ejecting the molten raw material from inside the container.

[0007] Preferably, pulleys are provided through the tops of both threaded cylinders, and the same belt is provided on the outside of the two pulleys. A rotating shaft is movably connected inside the baffle plate through a bearing. Gears are provided through the outside of the rotating shaft and one of the threaded cylinders, and the two gears mesh with each other. The top of the rotating shaft passes through the baffle plate and extends beyond the top of the baffle plate. A motor is fixedly provided at the top of the rotating shaft, and the bottom of the motor is fixedly connected to the top of the baffle plate for driving the threaded cylinder to rotate.

[0008] Preferably, the extrusion mechanism includes an extrusion box located at the bottom of the discharge pipe, the bottom of the extrusion box having a discharge trough, the top of the extrusion box being fixedly connected to a connecting pipe, the discharge pipe being able to be inserted into the connecting pipe, the discharge pipe having first threaded holes on both sides, the connecting pipe having second threaded holes on both sides, and the first threaded holes and the second threaded holes being connected internally to the same first bolt for extruding and molding the molten raw material.

[0009] Preferably, the top of the container is provided with a disassembly mechanism for easy disassembly of the ejection mechanism. The disassembly mechanism includes a first support plate on both sides of the baffle plate, and a second support plate fixedly provided on both sides of the container. The first support plate has a fourth threaded hole, and the second support plate has a third threaded hole. The third threaded hole and the fourth threaded hole are connected by the same second bolt. The top of the baffle plate is fixedly provided with two handles for easy disassembly of the ejection mechanism.

[0010] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0011] 1. Start the motor. The motor can drive the threaded cylinder to rotate. The rotation of the threaded cylinder can drive the threaded rod to move downward. The movement of the threaded rod can drive the push plate to move. The push plate can push the molten raw material out of the container. Since the push plate is in close contact with the inner wall of the container, the push plate can clean the molten raw material stuck to the inner wall of the container, avoiding waste.

[0012] 2. The molten raw material enters the extrusion box through the discharge pipe and is then discharged through the discharge trough on the extrusion box to form a film. When it is necessary to produce films of different widths, the first bolt is turned out from the second threaded hole and the inside of the first threaded hole, and the connecting pipe is removed from the bottom of the discharge pipe. The extrusion box can then be replaced so that films of different widths can be produced, thus expanding the applicability of this utility model. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a front view of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model in use;

[0016] Figure 3 This is a cross-sectional view of the protective cover of this utility model;

[0017] Figure 4 This is a schematic diagram of the ejection mechanism of this utility model;

[0018] Figure 5 This is a cross-sectional view of the shielding plate of this utility model;

[0019] Figure 6 This is a schematic diagram of the extrusion mechanism of this utility model;

[0020] Figure 7 This is a schematic diagram of the disassembly mechanism of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Filling container; 2. Discharge pipe;

[0023] 3. Extrusion mechanism, 301. Extrusion box, 302. Discharge chute, 303. Connecting pipe, 304. First threaded hole, 305. Second threaded hole, 306. First bolt;

[0024] 4. Pushing mechanism, 401. Push plate, 402. Threaded cylinder, 403. Threaded rod, 404. Pulley, 405. Belt, 406. Shaft, 407. Gear, 408. Motor, 409. Baffle plate;

[0025] 5. Insulation cover; 6. Heating element; 7. Switch valve;

[0026] 8. Disassembly mechanism; 801. First support plate; 802. Second support plate; 803. Third threaded hole; 804. Fourth threaded hole; 805. Second bolt; 806. Handle.

[0027] 9. Feed trough. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model provides, for example Figure 1-7 An extrusion mechanism for casting film production is shown, comprising a container tank 1, a discharge pipe 2 fixedly connected to the bottom of the container tank 1, an extrusion mechanism 3 for extruding molten raw materials at the bottom of the discharge pipe 2, a feed trough 9 fixedly connected to one side of the container tank 1, an ejection mechanism 4 for pushing molten raw materials out of the container tank 1 inside the container tank 1, a heat insulation cover 5 outside the container tank 1, a plurality of heating tubes 6 inside the heat insulation cover 5, and a switch valve 7 fixedly connected to the outside of the discharge pipe 2.

[0030] like Figure 4 , 5 As shown, the ejection mechanism 4 includes a push plate 401 disposed inside the container 1, a baffle plate 409 disposed on the top of the container 1, threaded cylinders 402 passing through both sides of the baffle plate 409, the threaded cylinders 402 and the baffle plate 409 being movably connected by bearings, and a threaded rod 403 being threadedly connected inside the threaded cylinder 402, the bottom end of the threaded rod 403 being fixedly connected to the top of the push plate 401;

[0031] like Figure 4 , 5 As shown, pulleys 404 are provided through the tops of both threaded cylinders 402, and the same belt 405 is provided on the outside of the two pulleys 404. A rotating shaft 406 is movably connected inside the baffle plate 409 through a bearing. Gears 407 are provided through the outside of the rotating shaft 406 and one of the threaded cylinders 402, and the two gears 407 mesh with each other. The top of the rotating shaft 406 passes through the baffle plate 409 and extends out of the top of the baffle plate 409. A motor 408 is fixedly provided at the top of the rotating shaft 406, and the bottom of the motor 408 is fixedly connected to the top of the baffle plate 409.

[0032] Raw materials are poured into the container 1 through the feed chute 9. The heating tube 6 is then activated, heating the raw materials inside the container 1 until they melt. The motor 408 is then activated, driving the rotating shaft 406 to rotate. The rotating shaft 406, under the action of two gears 407, drives the threaded cylinder 402 to rotate. The two threaded cylinders 402 rotate simultaneously under the action of the pulley 404 and the belt 405. The rotation of the threaded cylinders 402 drives the threaded rod 403 to move downward. The movement of the threaded rod 403 drives the push plate 401 to move. The push plate 401 pushes the molten raw materials out of the container 1. Since the push plate 401 is in close contact with the inner wall of the container 1, the molten raw materials adhering to the inner wall of the container 1 can be cleaned by the push plate 401, avoiding waste.

[0033] like Figure 6As shown, the extrusion mechanism 3 includes an extrusion box 301 located at the bottom of the discharge pipe 2. The bottom of the extrusion box 301 is provided with a discharge groove 302. The top of the extrusion box 301 is fixedly connected to a connecting pipe 303. The discharge pipe 2 can be inserted into the connecting pipe 303. The discharge pipe 2 is provided with first threaded holes 304 on both sides. The connecting pipe 303 is provided with second threaded holes 305 on both sides. The first threaded holes 304 and the second threaded holes 305 are connected by the same first bolt 306.

[0034] The molten raw material enters the extrusion box 301 through the discharge pipe 2, and is then discharged through the discharge trough 302 on the extrusion box 301 to form a film. When it is necessary to produce films of different widths, the first bolt 306 is turned out from the second threaded hole 305 and the first threaded hole 304, and the connecting pipe 303 is removed from the bottom of the discharge pipe 2. The extrusion box 301 can then be replaced so that films of different widths can be produced, thus expanding the applicability of this utility model.

[0035] like Figure 7 As shown, the top of the container 1 is provided with a disassembly mechanism 8 for easy disassembly of the ejection mechanism 4. The disassembly mechanism 8 includes a first support plate 801 on both sides of the baffle plate 409, and a second support plate 802 fixed on both sides of the container 1. The first support plate 801 has a fourth threaded hole 804, and the second support plate 802 has a third threaded hole 803. The third threaded hole 803 and the fourth threaded hole 804 are connected by the same second bolt 805. The top of the baffle plate 409 is fixed with two handles 806.

[0036] Rotate the second bolt 805 to unscrew it from the fourth threaded hole 804 and the third threaded hole 803. Then pull the handle 806 to remove the baffle plate 409 from the top of the container 1. Use the baffle plate 409 to remove the push plate 401 from the inside of the container 1, making it easier to clean the ejection mechanism 4 and the inside of the container 1, ensuring cleanliness.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An extrusion mechanism for the production of cast film comprising a containing vat (1), characterized in that: The bottom of the container (1) is fixedly connected to the discharge pipe (2), and the bottom of the discharge pipe (2) is provided with an extrusion mechanism (3) for extruding the molten raw material. The side of the container (1) is fixedly connected to the feed trough (9), and the inside of the container (1) is provided with an ejection mechanism (4) for pushing the molten raw material out of the container (1). The ejection mechanism (4) includes a push plate (401) disposed inside the container (1). The container (1) is provided with a baffle plate (409) at the top. Threaded cylinders (402) are provided through both sides of the baffle plate (409). The threaded cylinders (402) and the baffle plate (409) are movably connected by bearings. A threaded rod (403) is threadedly connected inside the threaded cylinder (402). The bottom end of the threaded rod (403) is fixedly connected to the top of the push plate (401).

2. An extrusion mechanism for cast film production according to claim 1, characterized in that: Both of the threaded cylinders (402) have pulleys (404) passing through their tops. Both pulleys (404) have the same belt (405) on their exteriors. The baffle plate (409) has a rotating shaft (406) movably connected to it via a bearing. Both the rotating shaft (406) and one of the threaded cylinders (402) have gears (407) passing through their exteriors. The two gears (407) mesh with each other. The top of the rotating shaft (406) passes through the baffle plate (409) and extends beyond the top of the baffle plate (409). A motor (408) is fixedly mounted on the top of the rotating shaft (406). The bottom of the motor (408) is fixedly connected to the top of the baffle plate (409).

3. The extrusion mechanism for cast film production according to claim 1, characterized in that: The extrusion mechanism (3) includes an extrusion box (301) located at the bottom of the discharge pipe (2). The bottom of the extrusion box (301) is provided with a discharge groove (302). The top of the extrusion box (301) is fixedly connected to a connecting pipe (303). The discharge pipe (2) can be inserted into the connecting pipe (303). The discharge pipe (2) is provided with first threaded holes (304) on both sides. The connecting pipe (303) is provided with second threaded holes (305) on both sides. The first threaded holes (304) and the second threaded holes (305) are connected by the same first bolt (306).

4. The extrusion mechanism for cast film production according to claim 1, characterized in that: The container (1) is provided with an insulation cover (5) on the outside, and multiple heating tubes (6) are provided inside the insulation cover (5).

5. The extrusion mechanism for producing a cast film according to claim 1, characterized in that: A switch valve (7) is fixedly installed on the outside of the discharge pipe (2).

6. The extrusion mechanism for cast film production according to claim 1, characterized in that: The top of the container (1) is provided with a disassembly mechanism (8) to facilitate the disassembly of the ejection mechanism (4); The disassembly mechanism (8) includes a first support plate (801) on both sides of the baffle plate (409), and a second support plate (802) fixed on both sides of the container (1). The first support plate (801) has a fourth threaded hole (804), and the second support plate (802) has a third threaded hole (803). The third threaded hole (803) and the fourth threaded hole (804) are connected by the same second bolt (805). The top of the baffle plate (409) is fixed with two handles (806).

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