High-efficiency plastic film extrusion molding device

Abstract

The invention discloses a high-efficiency plastic film extrusion molding device, and belongs to the field of plastic extruders. A high-efficiency plastic film extrusion molding device comprises an extrusion cylinder, a heating plate is arranged outside the extrusion cylinder, an extrusion head is installed at one end of the extrusion cylinder, a feeding hopper is installed on the outer wall of the extrusion cylinder, a filter plate is arranged at the joint of the extrusion cylinder and the extrusion head, and a dredging assembly is arranged in the extrusion cylinder. Materials in the extrusion cylinder are stirred and conveyed; when materials are conveyed, unsoftened material impurities left by filtering during conveying can be scraped off through the arranged dredging assembly, meanwhile, filtering holes for filtering can be dredged, it is ensured that secondary blockage cannot be caused, the material conveying efficiency is improved, the service life of the dredging assembly can be effectively prolonged in cooperation with the heat conduction assembly and the auxiliary assembly, and the practicability is high. Unsoftened materials and softened materials are mixed and softened again, so that the quality of the materials is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic extruders, in particular to a high-efficiency plastic film extrusion molding device. Background Art

[0002] Plastic films play a vital role in modern society and are widely used in many fields such as packaging, agriculture, construction and the electronics industry. Traditional plastic film production mainly relies on the extrusion molding process, which forms a film by passing plastic granules or powder heated to a certain temperature through an extruder head.

[0003] However, the existing plastic film extrusion molding devices have some limitations and shortcomings. A filter plate is generally arranged in the extrusion barrel to filter the melted plastic to prevent the extrusion head from being blocked and improve the output quality of the device. Although some devices use a scraper to scrape the filter plate during improvement, the material stuck in the filter hole is still prone to secondary blockage, resulting in the material being unable to pass through the filter hole in time, affecting the subsequent discharge of the material, causing the risk of failure, and thus reducing the working efficiency of the device. For this reason, we propose a high-efficiency plastic film extrusion molding device to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, a scraper is used to scrape the filter plate during improvement, but the material stuck in the filter hole is still prone to secondary blockage, resulting in the material being unable to pass through the filter hole in time, affecting the subsequent discharge of the material, and a high-efficiency plastic film extrusion molding device is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-efficiency plastic film extrusion molding device includes an extrusion barrel, a heating plate is arranged on the outside of the extrusion barrel, an extrusion head is installed at one end of the extrusion barrel, a feed hopper is installed on the outer wall of the extrusion barrel, a filter plate is arranged at the connection between the extrusion barrel and the extrusion head, and a dredging component is arranged in the extrusion barrel, which is used to dredge the hardened blockage on the filter plate when the material in the extrusion barrel is stirred and conveyed; a heat conduction component is arranged on the dredging component, which drives the heat conduction component to move synchronously when the dredging component is running, and is used to absorb the heat generated by the contact part between the dredging component and the filter plate to cool it down; the dredging component is also provided with an auxiliary component, which is used to stir the material scraped from the surface of the filter plate by the dredging component again.

[0007] Preferably, the dredging assembly includes a rotating tube rotatably connected to the extrusion barrel through a bearing, blades are arranged on the surface of the rotating tube, one end of the rotating tube passes through the extrusion barrel and extends to the outside where an exhaust port is arranged, a driving part for driving the rotating tube to rotate is arranged on the surface of the rotating tube, and a scraper is arranged on the other end of the rotating tube located in the extrusion barrel.

[0008] Preferably, the scraper includes a scraper fixed at one end of a rotating tube, a protrusion is slidably connected to the inner wall of one side of the scraper, one end of multiple protrusions passes through the scraper and extends to an internal fixed limiting plate, multiple protrusions are fixed with protective covers, the ends of the protective covers are fixedly connected to the outer wall of the scraper, and the surface of one side of the filter plate is provided with wear-resistant blocks distributed in a ring shape.

[0009] Preferably, the heat-conducting component includes a sliding rod fixed to a side of the limit plate, a piston is fixed to the end of the sliding rod, the piston is slidably connected in a connecting cylinder, one end of the connecting cylinder is fixed to the inner wall of the scraper, an extrusion spring is fixed to the inner wall of the connecting cylinder, the end of the extrusion spring is fixedly connected to the piston, and an adsorption piece is provided at one end of the connecting cylinder.

[0010] Preferably, the adsorption component includes an air suction hose fixed at one end of the connecting tube, the end of the air suction hose is fixedly connected to the limit plate, and a cavity is opened inside the limit plate and the protrusion, one end of one of the connecting tubes is located on one side of the air suction hose and an exhaust pipe is fixed thereon, one end of the exhaust pipe passes through the rotating tube and extends to the interior, and the other end of the connecting tube is connected to a connecting pipe, and the connecting pipe is connected to the exhaust pipe.

[0011] Preferably, the auxiliary component includes a rack fixed on one side of the limit plate, the surface of the rack is meshed with a gear, a rotating shaft is fixed at the axis of the gear, the surface of the rotating shaft is rotatably connected to the inner wall of the rotating tube through a bearing, and both ends of the rotating shaft extend to the outside of the rotating tube and are equipped with stirring blades.

[0012] Preferably, filter holes are provided on the surface of the filter plate, and the plurality of protrusions are adapted to the filter holes.

[0013] Preferably, a through hole is provided at the connection between the scraper and the rotating tube, the exhaust pipe passes through the through hole, and an opening is provided at the top of the limiting plate.

[0014] Preferably, the wear-resistant blocks are in a fan shape, and both side surfaces of the plurality of wear-resistant blocks are provided with rounded corners.

[0015] Preferably, a mounting frame is installed on the outside of the extrusion cylinder, and a mounting hole is provided on the surface of the mounting frame.

[0016] Compared with the prior art, the present invention provides a high-efficiency plastic film extrusion molding device, which has the following beneficial effects:

[0017] 1. This high-efficiency plastic film extrusion molding device can scrape off softened materials or impurities in the filter material when conveying the material in the extrusion barrel through the dredging component arranged in the extrusion barrel, and can also dredge the impurities stuck in the filter holes on the filter plate, ensuring that the material can pass through efficiently, ensuring the smooth extrusion of the device material, and reducing the occurrence of malfunctions.

[0018] 2. This is a high-efficiency plastic film extrusion molding device. When the dredging component is in operation, it can also drive the heat-conducting component to operate, so that the heat-conducting component extracts the heat entangled by the friction inside the dredging component, and then extrude the heat transfer value to the outside of the cylinder, thereby reducing the wear caused by friction between the dredging component and the filter plate and extending its service life.

[0019] 3. This kind of high-efficiency plastic film extrusion molding device can also drive the auxiliary components to operate when the dredging component is in operation, and utilizes the auxiliary components to reciprocate on the two side surfaces of the dredging component, so that the softened material removed from the dredging component can be mixed and stirred with the softened material again, thereby improving the softening effect of the material and improving the product quality of the material processing.

[0020] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention can scrape off the impurities of the unsoftened material left by the conveyed filter through the dredging component set during material transportation, and at the same time dredge the filter holes to ensure that no secondary blockage occurs, thereby improving the material transportation efficiency. In addition, the service life of the dredging component can be effectively extended by cooperating with the heat conduction component and the auxiliary component, and the unsoftened material can be mixed with the softened material for softening again, thereby improving the quality of the material output. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency plastic film extrusion molding device proposed by the present invention;

[0022] Figure 2 A schematic diagram of a high-efficiency plastic film extrusion molding device from above according to the present invention;

[0023] Figure 3 A schematic diagram of a top cross-sectional structure of a high-efficiency plastic film extrusion molding device proposed by the present invention;

[0024] Figure 4 This is a right side cross-sectional structural schematic diagram of a high-efficiency plastic film extrusion molding device proposed by the present invention;

[0025] Figure 5 The present invention proposes Figure 4 A schematic diagram of the enlarged structure of the middle A area;

[0026] Figure 6 A schematic diagram of a partially cutaway three-dimensional structure of a dredging component proposed by the present invention;

[0027] Figure 7 It is another three-dimensional structural schematic diagram of a partial cross-section of the dredging component proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the partial three-dimensional structure of the filter plate proposed by the present invention.

[0029] In the figure: 1. extrusion barrel; 11. feed hopper; 2. heating plate; 3. extrusion head; 4. filter plate; 5. dredging component; 51. rotating tube; 52. blade; 53. exhaust port; 54. driving part; 55. scraper; 56. bump; 57. protective cover; 58. limit plate; 59. wear-resistant block; 6. heat-conducting component; 61. slide rod; 62. piston; 63. connecting barrel; 64. extrusion spring; 65. suction hose; 66. cavity; 67. exhaust pipe; 68. connecting pipe; 7. auxiliary component; 71. rack; 72. gear; 73. rotating shaft; 74. stirring blade; 8. mounting frame. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, the term "multiple" refers to two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0032] In the description of this specification, the description of the terms "one embodiment", "some implementations", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] Reference Figure 1-8 A high-efficiency plastic film extrusion molding device comprises an extrusion barrel 1, a heating plate 2 is arranged on the outside of the extrusion barrel 1, an extrusion head 3 is installed at one end of the extrusion barrel 1, a feed hopper 11 is installed on the outer wall of the extrusion barrel 1, a filter plate 4 is arranged at the connection between the extrusion barrel 1 and the extrusion head 3, and a dredging component 5 arranged in the extrusion barrel 1 is used to dredge the hardened blockage on the filter plate 4 when the material in the extrusion barrel 1 is stirred and conveyed; a heat conduction component 6 is arranged on the dredging component 5, and the heat conduction component 6 is driven to move synchronously when the dredging component 5 is running, so as to absorb and cool the heat generated by the contact part between the dredging component 5 and the filter plate 4; an auxiliary component 7 is also arranged on the dredging component 5, which is used to stir the material scraped from the surface of the filter plate 4 by the dredging component 5 again, and a mounting frame 8 is installed on the outside of the extrusion barrel 1, and a mounting hole is arranged on the surface of the mounting frame 8.

[0034] In this scheme, when in use, the material is introduced into the interior of the extruder barrel 1 from the feed hopper 11 in advance, and the material in the extruder barrel 1 is stirred and transported to the other end by starting the dredging component 5 on the extruder barrel 1. During the transportation process, the heating plate 2 arranged outside the extruder barrel 1 is powered on to heat and soften the material inside the extruder barrel 1, and then it is extruded through the extruder head 3 to form a film, and then cooled and formed and rolled up through subsequent process steps. When it is transported to the extruder head 3, the filter plate 4 arranged can scrape off the unsoftened part of the material intercepted by the filter plate 4 to avoid clogging of the filter holes, and the filter holes on the filter plate 4 can also be cleaned during the operation of the dredging component 5. Unclogging can prevent materials from getting stuck in the holes and causing secondary blockage, thereby improving the material transportation efficiency. In this process, the operation of the unclogging component 5 can drive the heat conducting component 6 to operate, so that the heat conducting component 6 extracts the heat entangled by the friction inside the unclogging component 5, and then squeezes the heat transfer value out of the tube 1, reducing the wear caused by the friction between the unclogging component 5 and the filter plate 4, and extending its service life. At the same time, the unclogging component 5 can also drive the auxiliary component 7 to operate, and the auxiliary component 7 is used to reciprocate on the two side surfaces of the unclogging component 5, so that the softened material removed from the unclogging component 5 can be mixed and stirred with the softened material again, thereby improving the softening effect of the material and improving the product quality of the material processing.

[0035] In a preferred embodiment, referring to Figure 5 , Figure 6 and Figure 8 The dredging component 5 includes a rotating tube 51 rotatably connected to the extruder barrel 1 through a bearing, a blade 52 is arranged on the surface of the rotating tube 51, one end of the rotating tube 51 penetrates the extruder barrel 1 and extends to the outside to be provided with an exhaust port 53, a driving part 54 for driving the rotating tube 51 to rotate is arranged on the surface of the rotating tube 51, and the other end of the rotating tube 51 is located in the extruder barrel 1 and is provided with a scraper, the scraper includes a scraper 55 fixed to one end of the rotating tube 51, a protrusion 56 is slidably connected to the inner wall of one side of the scraper 55, one end of a plurality of protrusions 56 penetrates the scraper 55 and extends to an internal fixed limiting plate 58, a plurality of protrusions 56 are fixed with protective covers 57, and the end of the protective cover 57 is fixedly connected to the outer wall of the scraper 55, a wear-resistant block 59 distributed in an annular shape is arranged on the surface of one side of the filter plate 4, a filter hole is arranged on the surface of the filter plate 4, a plurality of protrusions 56 are adapted to the filter hole, the wear-resistant block 59 is fan-shaped, and the surfaces of both sides of the plurality of wear-resistant blocks 59 are provided with rounded corners.

[0036] In the above scheme, when in use, the driving part 54 is started to drive the rotating tube 51 to rotate, thereby causing the blades 52 on the rotating tube 51 located in the extrusion barrel 1 to rotate, so that the material falling into the extrusion barrel 1 can be stirred and slowly conveyed at the same time, avoiding the concentrated accumulation of the material, and at the same time, the material can be completely conveyed to the other end of the extrusion barrel 1. When passing through the filter plate 4, the unsoftened material can be filtered through the filter holes on the filter plate 4 to avoid clogging. When the rotating tube 51 rotates, it can also drive the scraper 55 to rotate synchronously. The protrusion 56 at one end of the scraper 55 contacts the surface of the filter plate 4. As the scraper 55 rotates and The wear-resistant blocks 59 on the surface of the filter plate 4 cooperate with each other, so that the protrusions 56 will be inserted into the filter holes on the filter plate 4 to transport the materials stuck in the filter holes, wherein the wear-resistant blocks 59 and the protrusions 56 are made of wear-resistant materials on the market, and when the protrusions 56 rotate, they avoid direct contact with one side surface of the filter plate 4, thereby reducing the wear on the filter plate 4 and saving maintenance costs. Compared with the frequent replacement of the filter plate 4 in the prior art, the maintenance operation is more convenient, and the secondary blockage caused by the material being stuck in the filter hole can be avoided. In addition, with the design of this structure, the rotating protrusions 56 can extrude and crush the unsoftened materials trapped between two adjacent wear-resistant blocks 59, thereby accelerating the softening of the materials.

[0037] It should be noted that the exhaust port 53 can be driven by a reduction motor instead, and the limit plate 58 is made of high temperature resistant sealing rubber material.

[0038] In a preferred embodiment, referring to Figure 5 and Figure 7The heat-conducting component 6 includes a sliding rod 61 fixed to a side of the limiting plate 58, a piston 62 is fixed at the end of the sliding rod 61, and the piston 62 is slidably connected in the connecting tube 63, one end of the connecting tube 63 is fixed on the inner wall of the scraper 55, and an extrusion spring 64 is fixed to the inner wall of the connecting tube 63, and the end of the extrusion spring 64 is fixedly connected to the piston 62, and an adsorption member is provided at one end of the connecting tube 63, and the adsorption member includes an air suction hose 65 fixed to one end of the connecting tube 63, and the end of the air suction hose 65 is fixedly connected to the limiting plate 58, and a cavity 66 is opened inside the limiting plate 58 and the protrusion 56, one end of one of the connecting tubes 63 is located on one side of the air suction hose 65 and an exhaust pipe 67 is fixed, one end of the exhaust pipe 67 passes through the rotating tube 51 and extends to the inside, and the end of the other connecting tube 63 is connected with a connecting pipe 68, and the connecting pipe 68 is connected to the exhaust pipe 67.

[0039] In the above scheme, when the scraper 55 rotates, the end of the protrusion 56 is provided with a rounded corner. After the filter hole on the filter plate 4 is inserted and unblocked, the scraper 55 rotates and exerts a force to cause the protrusion 56 to retract. When retracting, the limit plate 58 at one end of the protrusion 56 is horizontally displaced in the scraper 55, so that the piston 62 slides inside the connecting tube 63, so that the heat inside the protrusion 56 can be extracted to the inside of the connecting tube 63, and then transported to the rotating tube 51 through the exhaust pipe 67, and finally discharged through the exhaust port 53 to export the heat. In this way, the heat generated by the friction of the protrusion 56 during the unblocking process is cooled down, thereby extending its service life. At the same time, when the heat passes through the rotating tube 51, the material on the surface of the rotating tube 51 can be auxiliary heated, thereby improving the softening effect of the material and reducing the phenomenon of the material adhering to the outer surface of the rotating tube 51.

[0040] In a preferred embodiment, referring to Figure 5 , Figure 6 and Figure 7 The auxiliary component 7 includes a rack 71 fixed to one side of the limiting plate 58, a gear 72 is meshed on the surface of the rack 71, a rotating shaft 73 is fixed at the axis of the gear 72, the surface of the rotating shaft 73 is rotatably connected to the inner wall of the rotating tube 51 through a bearing, both ends of the rotating shaft 73 extend to the outside of the rotating tube 51 and are equipped with stirring blades 74, a through hole is provided at the connection between the scraper 55 and the rotating tube 51, the exhaust pipe 67 runs through the through hole, and an opening is provided at the top of the limiting plate 58.

[0041] In the above scheme, during the horizontal displacement of the limit plate 58, the rack 71 can also be driven to move synchronously, and the rack 71 is meshed with the gear 72 for transmission, thereby driving the rotating shaft 73 to rotate synchronously. The rotation of the rotating shaft 73 drives the stirring blades 74 located on both sides of the scraper 55 to rotate, so that the unsoftened material intercepted by the filtration can be stirred and mixed with the softened material. As the scraper 55 continues to rotate, the material is pushed to the inner wall of the extruder 1 to accelerate the softening, and the unsoftened material can be softened again by itself, which makes the operation more convenient and reduces the occurrence of device failure. A sealing sleeve is provided at the connection between the rotating shaft 73 and the scraper 55 to prevent material infiltration.

[0042] It should be noted that a through hole is provided on one side of the scraper 55 to facilitate ventilation after the scraper 55 is connected to the rotating tube 51, so as to avoid sealing causing the components in the device to fail to operate.

[0043] 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 high-efficiency plastic film extrusion molding device, comprising an extrusion barrel (1), a heating plate (2) is arranged outside the extrusion barrel (1), an extrusion head (3) is installed at one end of the extrusion barrel (1), a feed hopper (11) is installed on the outer wall of the extrusion barrel (1), and a filter plate (4) is arranged at the connection between the extrusion barrel (1) and the extrusion head (3), characterized in that: A dredging component (5) disposed in the extrusion barrel (1) is used to dredge hardened blockages on the filter plate (4) when the material in the extrusion barrel (1) is stirred and conveyed; The dredging component (5) is provided with a heat-conducting component (6), which drives the heat-conducting component (6) to move synchronously when the dredging component (5) is in operation, so as to absorb heat generated by the contact part between the dredging component (5) and the filter plate (4) to reduce the temperature; The dredging component (5) is also provided with an auxiliary component (7) for re-stirring the material scraped from the surface of the filter plate (4) by the dredging component (5).

2. A high-efficiency plastic film extrusion molding device according to claim 1, characterized in that: The dredging assembly (5) comprises a rotating tube (51) rotatably connected to the extrusion barrel (1) via a bearing, a blade (52) being arranged on the surface of the rotating tube (51), one end of the rotating tube (51) passing through the extrusion barrel (1) and extending to the outside and being provided with an exhaust port (53), a driving part (54) for driving the rotating tube (51) to rotate being arranged on the surface of the rotating tube (51), and a scraping member being arranged on the other end of the rotating tube (51) located in the extrusion barrel (1).

3. A high-efficiency plastic film extrusion molding device according to claim 2, characterized in that: The scraping member comprises a scraper (55) fixed to one end of a rotating tube (51); a protrusion (56) is slidably connected to the inner wall of one side of the scraper (55); one end of a plurality of the protrusions (56) penetrates the scraper (55) and extends to an internally fixed limiting plate (58); a protective cover (57) is fixed to each of the plurality of the protrusions (56); an end of the protective cover (57) is fixedly connected to the outer wall of the scraper (55); and a wear-resistant block (59) distributed in an annular shape is arranged on the surface of one side of the filter plate (4).

4. A high-efficiency plastic film extrusion molding device according to claim 3, characterized in that: The heat-conducting component (6) includes a sliding rod (61) fixed on a side of a limiting plate (58), a piston (62) fixed at the end of the sliding rod (61), the piston (62) being slidably connected in a connecting tube (63), one end of the connecting tube (63) being fixed on the inner wall of the scraper (55), an extrusion spring (64) being fixed on the inner wall of the connecting tube (63), the end of the extrusion spring (64) being fixedly connected to the piston (62), and an adsorption member being provided at one end of the connecting tube (63).

5. A high-efficiency plastic film extrusion molding device according to claim 4, characterized in that: The adsorption component comprises an air suction hose (65) fixed to one end of a connecting tube (63), the end of the air suction hose (65) being fixedly connected to a limiting plate (58), a cavity (66) being provided inside the limiting plate (58) and the protrusion (56), one end of one of the connecting tubes (63) being located on one side of the air suction hose (65) and being fixed with an exhaust pipe (67), one end of the exhaust pipe (67) passing through the rotating tube (51) and extending to the inside, and the other end of the connecting tube (63) being connected to a connecting pipe (68), and the connecting pipe (68) being connected to the exhaust pipe (67).

6. A high-efficiency plastic film extrusion molding device according to claim 3, characterized in that: The auxiliary component (7) comprises a rack (71) fixed to a side surface of the limiting plate (58); a gear (72) is meshed on the surface of the rack (71); a rotating shaft (73) is fixed at the axis of the gear (72); the surface of the rotating shaft (73) is rotatably connected to the inner wall of the rotating tube (51) through a bearing; and stirring blades (74) are installed at both ends of the rotating shaft (73) extending to the outside of the rotating tube (51).

7. A high-efficiency plastic film extrusion molding device according to claim 3, characterized in that: The surface of the filter plate (4) is provided with filter holes, and the plurality of protrusions (56) are adapted to the filter holes.

8. A high-performance plastic film extrusion molding device according to claim 5, characterized in that: A through hole is provided at the connection between the scraper (55) and the rotating tube (51), the exhaust pipe (67) passes through the through hole, and an opening is provided at the top of the limiting plate (58).

9. A high-efficiency plastic film extrusion molding device according to claim 3, characterized in that: The wear-resistant blocks (59) are in a fan shape, and both side surfaces of the plurality of wear-resistant blocks (59) are provided with rounded corners.

10. The high-performance plastic film extrusion molding device according to claim 1, characterized in that: A mounting frame (8) is installed on the outside of the extrusion cylinder (1), and a mounting hole is provided on the surface of the mounting frame (8).

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