A twin-screw extruder for a cast film machine with a heat-separating structure

Abstract

This utility model discloses a twin-screw extruder for a casting film machine with a heat-separating structure. It includes a barrel, inside which two sets of feeding screws are installed. A drive mechanism for rotating the feeding screws is located on the outside of the barrel. Several sets of heating plates are installed on the outside of the barrel, and these heating plates are separated by heat-insulating partitions. A heat-insulating shell is installed on the outside of the barrel, with the heating plates located inside the heat-insulating shell. The heat-insulating partition includes a partition body, and a ceramic heat-insulating layer is fixedly connected to the outside of the partition body. Several sets of heat-insulating connecting strips are provided on the outside of the ceramic heat-insulating layer, with the other end of each connecting strip connected to a fiberglass board. This twin-screw extruder for a casting film machine with a heat-separating structure addresses the problem of existing twin-screw extruders being inconvenient for zoned temperature control of different areas by installing two sets of feeding screws inside the barrel.

Description

Technical Field

[0001] This utility model relates to the field of casting film machine technology, specifically a twin-screw extrusion device for casting film machine with a heat separation structure. Background Technology

[0002] Cast film machines are important equipment in plastic film production, and one of their core components is the twin-screw extruder.

[0003] A search revealed existing technology, such as CN217862723U, a twin-screw extrusion mechanism for a cast film machine. This mechanism includes a barrel, a feeding screw installed inside the barrel, and a reducer installed outside the barrel. The output shaft of the reducer is connected to the feeding screw via a belt. A casting die is installed at the end of the barrel. A first copper plate is attached to the bottom of the barrel, and a heat-conducting pipe is soldered to the first copper plate. Second copper plates are installed at the upper and lower ends of the casting die, and the other end of the heat-conducting pipe is soldered to the second copper plate. This twin-screw extrusion mechanism for a cast film machine uses a first copper plate at the bottom of the barrel and second copper plates on the upper and lower sides of the casting die. The heat-conducting pipe connects the second and first copper plates for heat conduction. The heat from the high-temperature fluid inside the barrel preheats the casting die, preventing the raw material inside the die from cooling rapidly and ensuring a good extrusion effect. It has a simple structure, low manufacturing cost, and is easy to use.

[0004] In summary, existing twin-screw extruders have simple structures, low manufacturing costs, and are easy to use. However, during the material extrusion process, different regions of the material have different temperature requirements, and existing twin-screw extruders are not convenient for zoned temperature control of different regions. Therefore, a twin-screw extruder for a casting film machine with a heat separation structure is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a twin-screw extrusion device for a casting film machine with a heat separation structure, so as to solve the problem mentioned in the background art that the existing twin-screw extrusion devices are not convenient for zoned temperature control of different areas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a twin-screw extrusion device for a casting film machine with a heat-separating structure, comprising a barrel, wherein two sets of feeding screws are installed inside the barrel, and a drive mechanism for driving the feeding screws to rotate is provided on the outside of the barrel; several sets of heating plates are installed on the outside of the barrel, and the heating plates are heat-insulated and separated by heat-insulating partition plates; a heat-insulating shell is installed on the outside of the barrel, and the heating plates are located inside the heat-insulating shell; the heat-insulating partition plate includes a partition plate body, and a ceramic heat-insulating layer is fixedly connected to the outside of the partition plate body; several sets of heat-insulating connecting strips are provided on the outside of the ceramic heat-insulating layer, and the other end of the heat-insulating connecting strips is connected to a glass fiber board.

[0007] Preferably, a plurality of hollow insulation layers are formed between the ceramic insulation layer and the glass fiber board.

[0008] The above technical solution facilitates heat insulation operations.

[0009] Preferably, the thermal insulation shell includes an outer shell and an inner shell, and a thermal insulation layer is fixedly disposed between the outer shell and the inner shell.

[0010] The above technical solution facilitates heat preservation.

[0011] Preferably, the insulation layer includes a glass fiber layer, which is fixedly connected to the outer side of the inner shell, and the other side of the glass fiber layer is connected to the insulation cotton layer, which is connected to the inner side of the outer shell.

[0012] The above technical solution facilitates heat preservation.

[0013] Preferably, a casting die head is installed at the end of the barrel, and an air guide shroud is provided on the outside of the casting die head, with a heating mechanism installed inside the air guide shroud.

[0014] The above technical solution facilitates heating of the casting die head.

[0015] Preferably, the heating mechanism includes a fan, and the fan is connected to the heating box through a first conveying pipe. The heating box is connected to a gas equalization plate arranged inside the air guide hood through a second conveying pipe. The gas equalization plate is located outside the casting die head, and several sets of air outlets are installed on the side of the gas equalization plate near the casting die head.

[0016] The above technical solution facilitates heating of the casting die head.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This twin-screw extrusion device for a casting film machine with a heat separation structure solves the problem that existing twin-screw extrusion devices are not convenient for zoned temperature control of different areas. It installs two sets of feeding screws inside the barrel, and a drive mechanism to rotate the feeding screws is provided on the outside of the barrel. Several sets of heating plates are installed on the outside of the barrel, and the heating plates are separated by heat-insulating partitions. A heat-insulating shell is installed on the outside of the barrel, and the heating plates are located inside the heat-insulating shell. The heat-insulating partition includes a partition body, and a ceramic heat-insulating layer is fixedly connected to the outside of the partition body. Several sets of heat-insulating connecting strips are provided on the outside of the ceramic heat-insulating layer, and the other end of the heat-insulating connecting strips is connected to a glass fiber board. By setting several sets of heating plates, the outside of the barrel can be heated in zones, and the setting of the heat-insulating partition can reduce the temperature influence between the two sets of heating plates. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the heat insulation partition plate structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the thermal insulation shell structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the heating mechanism of this utility model.

[0022] In the diagram: 1. Barrel; 101. Feeding screw; 2. Drive mechanism; 3. Heating plate; 4. Insulation partition plate; 401. Partition plate body; 402. Ceramic insulation layer; 403. Insulation connecting strip; 404. Fiberglass board; 405. Hollow insulation layer; 5. Thermal insulation shell; 501. Outer shell; 502. Inner shell; 503. Insulation layer; 5031. Fiberglass layer; 5032. Insulation cotton layer; 6. Casting die head; 601. Air guide hood; 7. Heating mechanism; 701. Fan; 702. Heating box; 703. Second conveying pipe; 704. Air distribution plate; 705. Air outlet. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a twin-screw extrusion device for a casting film machine with a heat separation structure. Several sets of heating plates 3 are installed on the outside of the barrel 1. By setting several sets of heating plates 3, the outside of the barrel 1 can be heated in sections. The heating plates 3 are separated by heat insulation partition plates 4. A heat insulation shell 5 is installed on the outside of the barrel 1, and the heating plates 3 are located inside the heat insulation shell 5.

[0025] To further explain, two sets of feeding screws 101 are installed inside the barrel 1, and a drive mechanism 2 is provided on the outside of the barrel 1 to drive the feeding screws 101 to rotate. The drive mechanism 2 is existing technology and will not be described in detail. The drive mechanism 2 can drive the two sets of feeding screws 101 to rotate, thereby conveying the material through the two sets of feeding screws 101.

[0026] Specifically, the heat insulation partition 4 includes a partition body 401, and a ceramic heat insulation layer 402 is fixedly connected to the outside of the partition body 401. Several sets of heat insulation connecting strips 403 are provided on the outside of the ceramic heat insulation layer 402, and the other end of the heat insulation connecting strips 403 is connected to the fiberglass board 404. Several sets of hollow heat insulation layers 405 are formed between the ceramic heat insulation layer 402 and the fiberglass board 404. By setting the heat insulation partition 4, the temperature influence between the two sets of heating plates 3 can be reduced. The fiberglass board 404 performs the first heat insulation treatment on the heat, and then the hollow heat insulation layers 405 block and isolate the hot air generated by the heat. The ceramic heat insulation layer 402 provides a second heat insulation for the hot air. The partition body 401 can be made of rock wool board, which has low thermal conductivity and further improves the heat insulation effect.

[0027] Specifically, the thermal insulation shell 5 includes an outer shell 501 and an inner shell 502, and a thermal insulation layer 503 is fixedly disposed between the outer shell 501 and the inner shell 502. The thermal insulation layer 503 includes a glass fiber layer 5031, and the glass fiber layer 5031 is fixedly connected to the outside of the inner shell 502. The other side of the glass fiber layer 5031 is connected to the thermal insulation cotton layer 5032, and the thermal insulation cotton layer 5032 is connected to the inside of the outer shell 501.

[0028] To further explain, the insulation cotton layer 5032 uses insulation cotton, which is a new type of non-toxic, harmless, and pollution-free insulation material made from high-purity clay clinker, alumina powder, silica powder, chromium sand, and other raw materials. It has the characteristics of being lightweight, oxidation-resistant, having low thermal conductivity, good flexibility, corrosion-resistant, having low heat capacity, and sound insulation. The glass fiber layer 5031 is mainly composed of glass fiber, which has good insulation and strong heat resistance and can be used as a thermal insulation material, thereby improving the thermal insulation capacity of the insulation shell 5.

[0029] Specifically, a casting die head 6 is installed at the end of the barrel 1, and an air guide shroud 601 is provided on the outside of the casting die head 6. A heating mechanism 7 is installed inside the air guide shroud 601. Air outlets are opened on both sides of the air guide shroud 601 to facilitate the guided discharge of gas inside the air guide shroud 601. The heating mechanism 7 includes a fan 701, and the fan 701 is connected to the heating box 702 through a first conveying pipe. A heating rod is provided inside the heating box 702. The heating box 702 is connected to the air equalization plate 704 provided on the inside of the air guide shroud 601 through a second conveying pipe 703. The air equalization plate 704 is connected to the inner wall of the air guide shroud 601 through symmetrically arranged connecting arms. The air equalization plate 704 is located outside the casting die head 6, and several sets of air outlets 705 are installed on the side of the air equalization plate 704 near the casting die head 6.

[0030] When it is necessary to heat the casting die head 6, the heating box 702 and the fan 701 are turned on. The heating box 702 can heat the air generated by the fan 701. The heated air is sprayed out through the air outlet 705, thereby increasing the temperature of the casting die head 6.

[0031] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A twin-screw extruder for a cast film machine with a heat-separating structure, comprising a barrel (1), characterized in that: The barrel (1) is equipped with two sets of feeding screws (101) inside, and a drive mechanism (2) for driving the feeding screws (101) to rotate is provided on the outside of the barrel (1). Several sets of heating plates (3) are installed on the outside of the barrel (1), and the heating plates (3) are separated by heat insulation partition plates (4). A heat insulation shell (5) is installed on the outside of the barrel (1), and the heating plates (3) are located inside the heat insulation shell (5). The heat insulation partition (4) includes a partition body (401), and a ceramic heat insulation layer (402) is fixedly connected to the outside of the partition body (401). Several sets of heat insulation connecting strips (403) are provided on the outside of the ceramic heat insulation layer (402), and the other end of the heat insulation connecting strip (403) is connected to the glass fiber board (404).

2. The twin-screw extruder for a casting film machine with a heat-separating structure according to claim 1, characterized in that: Several sets of hollow insulation layers (405) are formed between the ceramic insulation layer (402) and the glass fiber board (404).

3. The twin-screw extruder for a casting film machine with a heat-separating structure according to claim 1, characterized in that: The heat insulation shell (5) includes an outer shell (501) and an inner shell (502), and a heat insulation layer (503) is fixedly provided between the outer shell (501) and the inner shell (502).

4. The twin-screw extruder for a casting film machine with a heat-separating structure according to claim 3, characterized in that: The insulation layer (503) includes a glass fiber layer (5031), and the glass fiber layer (5031) is fixedly connected to the outside of the inner shell (502). The other side of the glass fiber layer (5031) is connected to the insulation cotton layer (5032), and the insulation cotton layer (5032) is connected to the inside of the outer shell (501).

5. The twin-screw extruder for a casting film machine with a heat-separating structure according to claim 1, characterized in that: The end of the barrel (1) is equipped with a casting die head (6), and an air guide shroud (601) is provided on the outside of the casting die head (6). A heating mechanism (7) is installed inside the air guide shroud (601).

6. The twin-screw extruder for a casting film machine with a heat-separating structure according to claim 5, characterized in that: The heating mechanism (7) includes a fan (701), and the fan (701) is connected to the heating box (702) through a first conveying pipe. The heating box (702) is connected to the air distribution plate (704) provided inside the air guide hood (601) through a second conveying pipe (703). The air distribution plate (704) is located outside the casting die (6), and several sets of air outlets (705) are installed on the side of the air distribution plate (704) near the casting die (6).

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