CN116141631A

CN116141631A - Automatic extrusion device of plastic extruded sheet of adjustable broad width

Info

Publication number: CN116141631A
Application number: CN202310395538.6A
Authority: CN
Inventors: 姜廷飞
Original assignee: Shandong Hengchuan Yuexin Material Technology Co ltd
Current assignee: Shandong Hengchuan Yuexin Material Technology Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-05-23
Anticipated expiration: 2043-04-14
Also published as: CN116141631B

Abstract

The utility model discloses an automatic extrusion device for an adjustable wide plastic extruded sheet, and relates to the technical field of extruded sheet production. The utility model discloses an automatic extrusion device for an adjustable wide plastic extrusion plate, which comprises an extrusion die head, wherein a plurality of extrusion branch pipes communicated with a material passage arranged in the extrusion die head are embedded in the front end surface of the extrusion die head at equal intervals, a reflux mechanism comprises a plurality of mounting grooves which are arranged in the extrusion die head at equal intervals, correspond to the extrusion branch pipes and are communicated with the extrusion branch pipes, and a pushing component which is arranged in the mounting grooves and is matched with a plugging block so as to drive a reflux unit to move.

Description

Automatic extrusion device of plastic extruded sheet of adjustable broad width

Technical Field

The utility model relates to the technical field of extruded sheet production, in particular to an automatic extrusion device for an adjustable wide plastic extruded sheet.

Background

The extruded sheet is made of high polymer materials, is mainly used in the fields of building roof heat preservation, steel structure roof building wall heat preservation, building ground dampproofing, airport runway heat preservation and the like, extrusion molding refers to that plastics pass through a die with a specific cross section shape under a high temperature and a certain pressure in a viscous flowing state, an extrusion die is arranged outside an extrusion port during production of the extruded sheet, materials are extruded and molded through the die, and the extruded width of the extruded sheet needs to be adjusted according to different requirements during production.

The Chinese patent publication No. CN211616532U discloses a discharge width adjusting device of an extrusion molding machine, which comprises a discharge die head, wherein the front end of the discharge die head is provided with a discharge flow channel; the adjusting device is symmetrically arranged on two sides of the discharging die head, the rear end face of one end of the material blocking block is overlapped on the front end face of the discharging die head, the adjusting column is connected with the material blocking block through the connecting sliding block, and the adjusting device enables the material blocking block to slide on the front end face of the discharging die head through screwing an adjusting screw at one end of the adjusting column, so that the wide discharging width of the discharging runner is adjusted.

Although the device can realize the regulation to extruded sheet broad width, because the discharge flow channel port that is blocked temporarily by the baffle block in the discharge die head is in the closed state in the in-service use, partial material can stay in the section near the discharge flow channel port in the material is extruded to lead to long-time shutoff back material can cool gradually and dry the knot, thereby block up the discharge flow channel, cause follow-up when adjusting extruded sheet broad width again the discharge flow channel can not normally work.

In addition, the material blocking block can be adhered to partial materials while sliding on the discharge port, and due to the fact that a mechanism for timely cleaning the materials adhered to the surface of the material blocking block is lacking in the device, the materials are dried and bonded on the material blocking block, the material blocking block is easy to drive in the sliding adjustment process to contact the dried and bonded materials with the outside and the materials discharged from the discharge flow channel to cause mixed pollution, and the molding quality of the extruded sheet is affected.

Disclosure of Invention

The utility model provides an automatic extrusion device for an adjustable wide plastic extruded sheet, which solves the technical problems that in the comparative example, materials in a blocked discharge flow passage are easy to cool and dry during wide adjustment of the extruded sheet, so that a discharge flow passage port is blocked, and part of the materials are easy to adhere to the surface wall of a baffle block, so that mixed pollution is caused.

The utility model provides an automatic extrusion device for an adjustable wide plastic extruded sheet, which comprises an extrusion die head, wherein a plurality of extrusion branch pipes which are communicated with a material passage arranged in the extrusion die head are embedded in the front end surface of the extrusion die head at equal intervals, a width adjusting mechanism for plugging different numbers of the extrusion branch pipes so as to adjust the width of the extruded sheet is arranged outside the extrusion die head, the width adjusting mechanism comprises two plugging blocks which are symmetrically sleeved on the front part of the extrusion die head in a sliding manner, a distance adjusting component which is arranged on the upper part of the extrusion die head and is used for adjusting the distance between the two plugging blocks, a backflow mechanism which is arranged in the extrusion branch pipes and is used for pushing materials to backflow so as to prevent dry blockage is arranged in the extrusion branch pipes, and a backflow unit which is arranged in the installation groove at equal intervals and is in a sliding manner is arranged in the installation groove and is used for being matched with the plugging blocks so as to drive the backflow unit to move.

In one possible implementation manner, the backflow unit comprises a mounting plate which is in sliding connection with the inside of the mounting groove through a sliding groove matched with a sliding block, a cutting plate which is fixedly connected with the lower end face of the mounting plate through a first spring telescopic rod, a pushing plate which is in sliding connection with the lower end face of the mounting plate, and an extruding plate which is hinged with the lower parts of the cutting plate and the pushing plate together.

In a possible implementation manner, the pushing component comprises a shaft groove formed in the front groove wall of the mounting groove, a rotating shaft connected in the shaft groove in a rotating mode, a spiral guiding and moving groove is formed in the outer portion of the rotating shaft, a cross rod is slidably connected in the shaft groove through a sliding groove, the front end of the cross rod is slidably arranged in the spiral guiding and moving groove, the rear end of the cross rod is fixedly connected with the mounting plate, the upper end of the rotating shaft extends to the upper portion of the extrusion molding die and is fixedly connected with a gear, a deflector rod is hinged to the upper end of the extrusion molding die through a rotating column matched with a torsion spring, and an arc-shaped rack meshed with the gear is fixedly connected to the front end of the deflector rod.

In one possible implementation, the distance adjusting assembly includes a bi-directional screw rotatably connected to an upper portion of the extrusion die head by lugs, and a screw block fixedly connected to an upper portion of the block for threaded connection with the bi-directional screw.

In a possible implementation manner, scraping mechanisms for removing materials adhered to the surface of the plugging block are mounted on the left side and the right side of the extrusion die head, each scraping mechanism comprises a scraping plate fixedly connected to the outside of the extrusion die head and attached to the rear end face of the plugging block, a cleaning brush is fixedly connected to the outside of each scraping plate, and a collecting box is fixedly connected to the side portion of the extrusion die head through a fixing rod.

In one possible implementation manner, the upper end surface of the extrusion molding branch pipe is provided with a through groove for the backflow unit to extend in, the inside of the groove wall of the through groove is provided with a box-shaped groove, the inside of the box-shaped groove is slidably connected with a valve plate, and a second spring telescopic rod is fixedly connected between the valve plate and the box-shaped groove.

In one possible implementation, the front end surface of the valve plate is an inclined surface, and the inclined surface is fitted on the surface of the extrusion plate.

In one possible implementation, an arrow-shaped flow breaking fin is fixedly connected to the lower portion of the cutoff plate.

From the above technical scheme, the utility model has the following advantages: in the utility model, in the process of blocking the extrusion molding branch pipe by the reflux unit, the port of the extrusion molding branch pipe is closed by the cutting board, then the extrusion board rotates gradually around the hinge joint of the extrusion board and the cutting board, and the material in the extrusion molding branch pipe is pushed to reflux into the material passage, so that the condition that the extrusion molding branch pipe is blocked due to cooling and drying of the material near the port of the extrusion molding branch pipe is avoided, and the normal material passing of the extrusion molding branch pipe is ensured.

According to the utility model, materials adhered to the surface of the plugging block are timely removed through the scraping plate and the cleaning brush attached to the surface wall of the plugging block in the process of adjusting and sliding the plugging block, so that the plugging block is always in a clean state, the situation that the materials in the extrusion molding branch pipe are polluted is avoided, and the production quality of the extrusion molding plate is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a front view angle of an automatic extrusion device for an adjustable wide plastic extruded sheet.

Fig. 2 is a schematic diagram of a rear view angle of an automatic extrusion device for an adjustable wide plastic extruded sheet.

FIG. 3 is a schematic cross-sectional view of an extrusion die and an extrusion manifold according to the present utility model.

Fig. 4 is a schematic perspective sectional structure of a reflow mechanism provided by the utility model.

Fig. 5 is a schematic diagram of a cross-sectional structure of a side view of a reflow mechanism according to the present utility model.

Fig. 6 is a schematic diagram of a mounting structure of a gear and an arc rack in a top view.

Fig. 7 is a schematic diagram of a state change of the reflow unit provided by the present utility model during operation.

Wherein the above figures include the following reference numerals: 1. an extrusion die; 2. a material passage; 3. extruding branch pipes; 7. a box-like groove; 8. a valve plate; 9. a spring telescopic rod II; 4. a width adjusting mechanism; 41. a block; 42. a distance adjusting component; 421. a bidirectional screw; 422. a screw block; 5. a reflow mechanism; 51. a mounting groove; 52. a reflow unit; 521. a mounting plate; 522. a spring telescopic rod; 523. a cutoff plate; 524. a push plate; 525. an extrusion plate; 53. a pushing assembly; 531. a rotating shaft; 532. a spiral guide and shift groove; 533. a cross bar; 534. a gear; 535. a deflector rod; 536. an arc-shaped rack; 6. a scraping mechanism; 61. a scraper; 62. a cleaning brush; 63. and a collection box.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1 and 3, the present utility model provides a technical solution: the utility model provides an automatic extrusion device of adjustable broad width's plastic extruded sheet, includes extrusion die 1, and extrusion die 1 preceding terminal surface equidistance scarf joint has a plurality of with offer the extrusion branch 3 of the inside material passageway 2 intercommunication of extrusion die 1.

Referring to fig. 1, in this embodiment, the width adjusting mechanism 4 for plugging different numbers of extrusion branch pipes 3 to adjust the width of the extruded sheet is installed outside the extrusion die 1, the width adjusting mechanism 4 includes two plugging blocks 41 symmetrically and slidably sleeved on the front portion of the extrusion die 1, a distance adjusting component 42 installed on the upper portion of the extrusion die 1 to adjust the distance between the two plugging blocks 41, the distance adjusting component 42 includes a bidirectional screw 421 rotatably connected to the upper portion of the extrusion die 1 through a lug, and a threaded block 422 fixedly connected to the upper portion of the plugging block 41 to be in threaded connection with the bidirectional screw 421.

The extrusion molding branch pipes 3 with proper quantity are adjusted to be communicated with the outside by utilizing the width adjusting mechanism 4 according to the width of the extrusion molding plate to be produced, the bidirectional screw 421 is rotated to drive the threaded blocks 422 to move towards the directions approaching to or separating from each other, the threaded blocks 422 then drive the plugging blocks 41 to slide outside the extrusion molding die head 1, and part of the extrusion molding branch pipes 3 are plugged, so that the width adjustment of the extrusion molding plate is realized.

Referring to fig. 4, 5 and 7, in this embodiment, the automatic extrusion device further includes a backflow mechanism 5 installed inside the extrusion branch pipe 3 for pushing the material to backflow so as to prevent dry blockage, the backflow mechanism 5 includes a plurality of equally spaced mounting grooves 51 corresponding to and communicating with the extrusion branch pipe 3 inside the extrusion die head 1, and a backflow unit 52 slidably disposed inside the mounting grooves 51, the backflow unit 52 includes a mounting plate 521 slidably connected inside the mounting grooves 51 through a sliding groove matching sliding block, and a cutoff plate 523 fixedly connected to a lower end surface of the mounting plate 521 through a first spring expansion link 522, an arrow-shaped flow breaking fin is fixedly connected to a lower portion of the cutoff plate 523, the backflow unit 52 further includes a push plate 524 vertically slidably connected to a lower end surface of the mounting plate 521, and the lower portions of the cutoff plate 523 and the push plate 524 are commonly hinged with an extrusion plate 525.

Referring to fig. 4 and 6, the reflow mechanism 5 includes a pushing component 53 mounted in the mounting groove 51 and used for being matched with the plugging block 41 so as to drive the reflow unit 52 to move, the pushing component 53 includes a shaft groove formed on the front groove wall of the mounting groove 51 and a rotating shaft 531 rotatably connected in the shaft groove, a spiral guiding groove 532 is formed outside the rotating shaft 531, a cross rod 533 is slidingly connected in the shaft groove through a sliding groove, the front end of the cross rod 533 is slidingly arranged in the spiral guiding groove 532, the rear end of the cross rod 533 is fixedly connected with the mounting plate 521, the upper end of the rotating shaft 531 extends to the upper portion of the extrusion die 1 and is fixedly connected with a gear 534, the upper end of the extrusion die 1 is hinged with a deflector 535 through a rotating post matched torsion spring, and the front end of the deflector 535 is fixedly connected with an arc-shaped rack 536 meshed with the gear 534.

Referring to fig. 5, the upper end surface of the extrusion branch pipe 3 is provided with a through groove into which the backflow unit 52 extends, the inside of the groove wall is provided with a box groove 7 after the through groove, the inside of the box groove 7 is slidably connected with a valve plate 8, a second spring telescopic rod 9 is fixedly connected between the valve plate 8 and the box groove 7, the front end surface of the valve plate 8 is an inclined surface, the inclined surface is attached to the surface of the extrusion plate 525, and materials adhered to the extrusion plate 525 can be shoveled off in the process of upward moving of the extrusion plate 525.

Referring to fig. 5 and 6, the plugging block 41 is L-shaped, and the vertical section thereof is attached to the port of the extrusion branch pipe 3, the plugging block 41 moves outside the extrusion die head 1 while the reflux mechanism 5 in the plugged extrusion branch pipe 3 is touched to move, when the plugging block 41 slides to the position of the extrusion branch pipe 3 to be plugged, the plugging block 41 abuts against the deflector 535 and pushes against the deflector 535 to rotate around the rotating post, the deflector 535 then drives the arc rack 536 to rotate around the rotating post, the arc rack 536 then drives the rotating shaft 531 to rotate through meshing with the gear 534, the spiral guide groove 532 arranged outside the rotating shaft 531 is continuously changed in the rotating process of the rotating shaft 531, the cross rod 533 is further extruded to move downwards, the cross rod 533 then drives the mounting plate 521 to descend, the initial state of the first spring telescopic rod 522 is in an elongated state, and the first spring telescopic rod 522, the cut-off plate 523, the extrusion plates 525, the push plate 524 and the mounting plate 521 jointly form a shape with a right trapezoid cross section.

Referring to fig. 5 and 7, in the process of descending the backflow unit 52, the pressing plate 525 pushes the valve plate 8 to slide and gradually retract into the box-shaped groove 7, the cutting plate 523 vertically moves downward, the arrow-shaped flow breaking fin mounted at the lower part of the cutting plate 523 can reduce the resistance of the molten material to the cutting plate 523 in the process of descending the cutting plate 523 until the cutting plate 523 abuts against the lower cavity wall of the extrusion branch 3, the material in the extrusion branch 3 is isolated from the outside, then the mounting plate 521 continues to descend, the first spring expansion rod 522 is gradually compressed, the mounting plate 521 pushes the pressing plate 525 to rotate around the hinge position of the pressing plate 525 and the cutting plate 523 through the push plate 524, the material cut in the inclined state is pressed back in the extrusion branch 3 in the rotating process, and flows into the material passage 2 in the heat-preserving state until the pressing plate 525 rotates to the bottom to be completely attached to the lower cavity wall of the extrusion branch 3, the first spring expansion rod 522 is compressed to the shortest state at this time, the first spring expansion rod 522, the first spring expansion rod 524, the pressing plate 521, the push plate 521 and the mounting plate 521 jointly form the shape, and the pressing plate 521 can avoid the situation of being close to the extrusion port of the extrusion port 3 from being cooled.

When the plugging block 41 is removed from the port of the covered extrusion molding branch pipe 3, the torsion spring drives the extruded and rotated deflector rod 535 to reversely rotate and reset, the deflector rod 535 then drives the arc-shaped rack 536 to reversely rotate around the rotary column, then drives the rotary shaft 531 to rotate through the gear 534, the steps are reversely repeated, the spiral guide and move groove 532 driven by the rotary shaft 531 reversely rotates to drive the cross rod 533 to move upwards, the cross rod 533 then lifts the return unit 52 to gradually change into an initial state, and the extrusion molding branch pipe 3 is communicated with the outside again.

Referring to fig. 2 and 3, in this embodiment, scraping mechanisms 6 for removing materials adhering to the surface of the plugging block 41 are mounted on the left and right sides of the extrusion die 1, the scraping mechanisms 6 include a scraper 61 fixedly connected to the outside of the extrusion die 1 and attached to the rear end surface of the plugging block 41, a cleaning brush 62 is fixedly connected to the outside of the extrusion die 1, the scraper 61 is closer to the extrusion branch pipe 3, and a collecting box 63 is fixedly connected to the side of the extrusion die 1 through a fixing rod.

The shutoff piece 41 is driven the in-process that removes by two-way screw 421 cooperation screw thread piece 422, and scraper blade 61 is laminated mutually with the rear end face of shutoff piece 41 to can remove the material that adheres to its surface and drop to collecting box 63 in when shutoff piece 41 removes, the material of partly being removed and still adhering to the shutoff piece 41 surface is cleared up again through cleaning brush 62, thereby guarantees the cleanness on shutoff piece 41 surface, has avoided the circumstances that the material was polluted, has improved the shaping quality of extruded sheet.

During operation, firstly, the extrusion molding branch pipes 3 with proper quantity are adjusted to be communicated with the outside through the width adjusting mechanism 4 according to the width of the extrusion molding plate to be produced, the backflow mechanism 5 which is positioned in the blocked extrusion molding branch pipe 3 while the extrusion molding branch pipe 3 is blocked by the movement of the blocking block 41 in the width adjusting mechanism 4 is triggered to operate, the molten extrusion molding branch pipe 3 after being blocked is pushed to flow back into the material passage 2, the situation that the materials at the port of the extrusion molding branch pipe 3 are cooled is avoided, the blocking block 41 slides and the scraping mechanism 6 is synchronously carried out, the materials adhered on the surface of the blocking block 41 are timely removed, and the situation that the materials are polluted is avoided.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "first," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", "first", "second" may include at least one such feature, either explicitly or implicitly. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The embodiments of the present utility model are all preferred embodiments of the present utility model, and are not limited in scope by the present utility model, so that all equivalent changes according to the structure, shape and principle of the present utility model are covered in the scope of the present utility model.

Claims

1. An automatic extrusion device of adjustable broad plastic extruded sheet, includes extrusion die (1), its characterized in that: the front end surface of the extrusion die head (1) is embedded with a plurality of extrusion branch pipes (3) which are communicated with a material passage (2) arranged in the extrusion die head (1) at equal intervals;

the extrusion molding die head (1) externally mounted is used for plugging extrusion molding branch pipes (3) of different numbers so as to adjust width of extruded sheet and adjusts wide mechanism (4), wide mechanism (4) include:

two symmetrical blocking blocks (41) which are sleeved on the front part of the extrusion die head (1) in a sliding way, and a distance adjusting assembly (42) which is arranged on the upper part of the extrusion die head (1) and used for adjusting the distance between the two blocking blocks (41);

further comprises a backflow mechanism (5) arranged inside the extrusion branch pipe (3) and used for pushing materials to flow back so as to prevent dry blockage, and the backflow mechanism (5) comprises:

the plurality of equidistance is offered inside extrusion molding head (1) and extrusion molding branch pipe (3) one-to-one and mounting groove (51) of intercommunication, and the slip sets up in inside backward flow unit (52) of mounting groove (51), installs inside being used for with shutoff piece (41) cooperation in order to drive the promotion subassembly (53) that backward flow unit (52) removed in mounting groove (51).

2. The automatic extrusion device for the plastic extruded sheet with adjustable wide width according to claim 1, wherein: the backflow unit (52) comprises a mounting plate (521) which is in sliding connection with the inside of the mounting groove (51) through a sliding groove matched with a sliding block, a cutting plate (523) which is fixedly connected with the lower end face of the mounting plate (521) through a first spring telescopic rod (522), a pushing plate (524) which is in sliding connection with the lower end face of the mounting plate (521), and an extruding plate (525) is hinged to the lower parts of the cutting plate (523) and the pushing plate (524) together.

3. An adjustable wide width automatic extrusion device for plastic extruded sheets according to claim 2, wherein: the pushing component (53) comprises a shaft groove formed in the front groove wall of the mounting groove (51), a rotating shaft (531) rotationally connected to the inside of the shaft groove, a spiral guide moving groove (532) is formed in the outside of the rotating shaft (531), a cross rod (533) is slidably connected to the inside of the shaft groove through a sliding groove, the front end of the cross rod (533) is slidably arranged inside the spiral guide moving groove (532), the rear end of the cross rod (533) is fixedly connected with the mounting plate (521), the upper end of the rotating shaft (531) extends to the upper portion of the extrusion molding die head (1) and is fixedly connected with a gear (534), a deflector rod (535) is hinged to the upper end of the extrusion molding die head (1) through a rotating column matched with a torsion spring, and an arc-shaped rack (536) meshed with the gear (534) is fixedly connected to the front end of the deflector rod (535).

4. The automatic extrusion device for the plastic extruded sheet with adjustable wide width according to claim 1, wherein: the distance adjusting assembly (42) comprises a bidirectional screw rod (421) which is rotationally connected to the upper part of the extrusion die head (1) through lugs, and a thread block (422) which is fixedly connected to the upper part of the plugging block (41) and is in threaded connection with the bidirectional screw rod (421).

5. The automatic extrusion device for the plastic extruded sheet with adjustable wide width according to claim 1, wherein: the scraping mechanism (6) for removing materials adhered to the surface of the plugging block (41) is arranged on the left side and the right side of the extrusion molding die head (1), the scraping mechanism (6) comprises a scraping plate (61) fixedly connected to the outside of the extrusion molding die head (1) and attached to the rear end face of the plugging block (41), a cleaning brush (62) is fixedly connected to the outside of the extrusion molding die head (1), and a collecting box (63) is fixedly connected to the side portion of the extrusion molding die head (1) through a fixing rod.

6. An adjustable wide width automatic extrusion device for plastic extruded sheets according to claim 2, wherein: the extrusion molding branch pipe (3) is characterized in that a through groove into which the backflow unit (52) stretches is formed in the upper end face of the extrusion molding branch pipe, a box-shaped groove (7) is formed in the rear groove wall of the through groove, a valve plate (8) is connected inside the box-shaped groove (7) in a sliding mode, and a second spring telescopic rod (9) is fixedly connected between the valve plate (8) and the box-shaped groove (7) in a common mode.

7. The automatic extrusion device for the plastic extruded sheet with adjustable wide width according to claim 6, wherein: the front end face of the valve plate (8) is an inclined plane, and the inclined plane is attached to the surface of the extrusion plate (525).

8. An adjustable wide width automatic extrusion device for plastic extruded sheets according to claim 2, wherein: the lower part of the cutoff plate (523) is fixedly connected with an arrow-shaped flow breaking fin.