CN111590849B

CN111590849B - Sheet extrusion die head

Info

Publication number: CN111590849B
Application number: CN202010448287.XA
Authority: CN
Inventors: 李亮
Original assignee: Taizhou Huangyan Liangke Mould Machinery Co ltd
Current assignee: Taizhou Huangyan Liangke Mould Machinery Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2022-08-05
Anticipated expiration: 2040-05-25
Also published as: CN111590849A

Abstract

The invention discloses a sheet extrusion die head, which relates to the technical field of dies and comprises an upper die body with an upper die lip and a lower die body with a lower die lip, wherein the upper die lip and the lower die lip are spliced to form a die lip gap; the adjusting rod is coaxially connected with the sliding hole in a sliding mode, and one end of the adjusting rod abuts against the side wall, close to the die lip gap, of the die lip adjusting groove; the expansion pipe is coaxially arranged at one end of the adjusting rod, which is far away from the die lip adjusting groove, and a heating rod is arranged in the expansion pipe; the adjusting rod is further provided with a limiting part far away from the upper die body, the limiting part comprises a limiting seat fixedly connected to the upper die body, and the limiting seat is located at the position, far away from the adjusting rod, of the expansion pipe and limits the position of the expansion pipe. The expansion adjusting piece is arranged, so that the die lip gap can be finely adjusted, and the adjusting precision is higher.

Description

Sheet extrusion die head

Technical Field

The invention relates to the technical field of dies, in particular to a sheet extrusion die head.

Background

The PVB film is mainly used for laminated glass, and a PVB film taking polyvinyl butyral as a main component is sandwiched between two pieces of glass. In the production of a PVB film, a sheet extrusion die is used to extrude PVB through a die lip gap of the sheet extrusion die to form the PVB film.

Chinese patent with patent number CN202608022U, this patent discloses an extruder die head, including the last mould that has last lip and the lower mould that has lower lip, go up the lip and constitute the die orifice with lower lip, the aperture of die orifice is adjusted through a plurality of last lip adjusting screws and a plurality of lower lip adjusting screws, be provided with a plurality of through-holes along horizontal interval on the die body of last mould, the diameter of through-hole slightly is greater than the external diameter of last lip adjusting screw, it is fixed to be provided with a plurality of fine setting blocks along horizontal end to end ground between die body and last lip, be formed with the screw that the position corresponds with a plurality of through-holes on the fine setting block, the screw suits with last lip adjusting screw, it is fine thread screw to go up the lip adjusting screw.

The die orifice is the die lip clearance promptly, and when the PVB film produced, because the clearance of die orifice is very little, the clearance adjustment control of die orifice usually is between several microns to tens microns, thereby can't satisfy the purpose that the die orifice finely tunes so that product thickness is more even through the regulating variable of adjusting screw, awaits the improvement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the sheet extrusion die head which has the advantages that the die lip gap can be finely adjusted, and the adjustment precision is higher.

In order to achieve the purpose, the invention provides the following technical scheme:

a sheet extrusion die head comprises an upper die body with an upper die lip and a lower die body with a lower die lip, wherein the upper die lip and the lower die lip are spliced to form a die lip gap, one side of the upper die body, which is far away from the lower die body, is provided with a die lip adjusting groove, the upper die body is provided with a plurality of sliding holes at intervals in the transverse direction, each sliding hole is correspondingly provided with an expansion adjusting piece, and each expansion adjusting piece comprises an adjusting rod and an expansion pipe; the adjusting rod is coaxially connected with the sliding hole in a sliding mode, and one end of the adjusting rod abuts against the side wall, close to the die lip gap, of the die lip adjusting groove; the expansion pipe is coaxially arranged at one end of the adjusting rod, which is far away from the die lip adjusting groove, and a heating rod is arranged in the expansion pipe;

the expansion pipe expansion die is characterized in that a limiting part is further arranged on the upper die body and comprises a limiting seat fixedly connected to the upper die body, and the limiting seat is located at one end, away from the adjusting rod, of the expansion pipe to limit the position of the expansion pipe.

Through the technical scheme, when the die lip clearance is required to be adjusted, the heating rod is heated, so that the expansion pipe is lengthened along the axial length of the expansion pipe, the expansion pipe is limited by the limiting seat at the moment, the adjusting rod is pushed by the expansion pipe, the end part of the adjusting rod abuts against the side wall of the die lip adjusting groove to adjust the die lip clearance, and the die lip clearance is more uniform. The expansion adjusting piece is arranged, so that the die lip gap can be finely adjusted, and the adjusting precision is higher.

The present invention in a preferred example may be further configured to: the limiting part also comprises limiting bolts in threaded connection with the limiting seat, and the number and the positions of the limiting bolts are in one-to-one correspondence with the expansion adjusting parts; the limiting bolt is coaxially arranged with the corresponding expansion pipe, and the limiting bolt is positioned at one end, far away from the adjusting rod, of the expansion pipe to limit the position of the expansion pipe.

Through above-mentioned technical scheme, set up spacing bolt, conflict the expansion pipe through spacing bolt and keep away from the one end of adjusting the pole, spacing seat can be integrative to be set up, can be to the installation location of every expansion adjustment spare through spacing bolt for the installation accuracy of each expansion adjustment spare is higher, thereby makes the precision of overall regulation better.

The present invention in a preferred example may be further configured to: one end of the expansion pipe, which is far away from the adjusting rod, is coaxially provided with a positioning circular groove; the limiting seat is provided with adjusting grooves close to the end face of the expansion pipe, the number and the positions of the adjusting grooves are in one-to-one correspondence with the sliding holes, and each adjusting groove is coaxially arranged with the corresponding sliding hole; the locating part is still including sliding the regulation ball of connecting in the adjustment tank, the diameter of regulation ball is the same with the diameter of adjustment tank, and the diameter of regulation ball is greater than the diameter setting of location circular slot, spacing bolt supports tight regulation ball on location circular slot.

Through above-mentioned technical scheme, the one end of expansion pipe and the coaxial setting of regulation pole, the other end of expansion pipe supports tight adjusting ball through spacing bolt and will adjust the partial embedding location circular slot of ball, make adjusting ball and location circular slot form line contact and fix a position, make the centre of sphere of adjusting ball be located the axis of expansion pipe, then through the coaxial setting of adjusting groove and the hole that slides, the adjusting groove is fixed a position the adjusting ball and is made the axis of expansion pipe be in with the coaxial state in hole that slides at the inflation regulation in-process. Set up location circular slot and adjusting ball, the cooperation setting of adjusting ball and location circular slot makes the axial positioning of expansion pipe more accurate to make the expansion pipe inflation more accurate to the precision of the regulation of regulating lever, make die lip clearance adjustment precision better.

The present invention in a preferred example may be further configured to: the number of the adjusting balls in each adjusting groove is two.

Through the technical scheme, the two adjusting balls are arranged, the force of the limiting bolt for tightly abutting the adjusting ball is transmitted to the adjusting ball attached to the positioning circular groove through the adjusting ball close to the limiting bolt, the limiting bolt is in threaded connection with the limiting seat, the accuracy of threaded fit is insufficient, the force for tightly abutting the adjusting ball forms radial component force to a certain extent, the limiting bolt transmits the force to the adjusting ball attached to the positioning circular groove through the adjusting ball, the position where the two adjusting balls are abutted is positioned at the connecting line of the axes of the two adjusting balls through the limitation of the adjusting groove, the abutted points of the two adjusting balls are positioned on the axis of the adjusting groove, at the moment, the abutting force of the limiting bolt is transmitted through the adjusting ball, so that the abutting force of the adjusting ball attached to the positioning circular groove is along the axial state of the expansion pipe, thereby reduced the condition of expansion pipe radial deformation in the use for holistic use is more durable and die lip clearance adjustment precision is higher.

The present invention in a preferred example may be further configured to: the diameter of the limiting bolt is smaller than that of the adjusting groove, through holes are formed in the limiting seat, the number and the position of the through holes are in one-to-one correspondence with the adjusting groove, and the diameter of the through holes is larger than or equal to that of the adjusting groove; the axis of the through hole is intersected with the axis of the adjusting groove and is vertically arranged, and the axis of the through hole is positioned on one side, far away from the expansion pipe, of the adjusting ball.

Through above-mentioned technical scheme, in the in-service use, can deform in the adjusting ball use, will lead to holistic precision variation, when the die lip clearance adjustment precision of a certain part is not enough, just need change the adjusting ball of corresponding department. Can loosen spacing bolt this moment, break away from in the adjustment tank after aiming at the through-hole with the adjusting ball through the slip of inflation regulating part, then reset inflation regulating part to put into the adjustment tank with new adjusting ball through the through-hole, then it can to tighten spacing bolt again. Set up the through-hole for the change of adjusting the ball is more convenient, and the setting of through-hole can be so that the gas permeability in the adjustment tank is better in addition, thereby has reduced the heat of expansion pipe heating and has accumulated the condition that leads to influencing adjusting ball size precision in the adjustment tank, thereby makes holistic use more lasting stable.

The present invention in a preferred example may be further configured to: the expansion pipe includes that the coaxial body that sets up on adjusting the pole and the coaxial spacing post that keeps away from regulation pole one end in the body that sets up, the heating rod is located the internal setting of body, spacing post setting is seted up in the location circular slot, the wiring groove has been seted up to the one end that the body is close to spacing post, the wiring groove is followed the body radially runs through its lateral wall setting.

Through the technical scheme, the setting of wiring groove conveniently supplies the wire of pin heater to pass through, sets up spacing post, sets up the location circular slot through offering on the spacing post to reduced the tip that the wiring groove was offered to the expansion pipe of directly contradicting of adjusting ball, thereby made the positioning accuracy of adjusting ball and location circular slot better.

The present invention in a preferred example may be further configured to: and a connecting rod is fixedly connected between the limiting seat and the upper die body, and the axis of the connecting rod is parallel to the axis of the expansion adjusting piece.

Through above-mentioned technical scheme, set up the connecting rod, the parallel arrangement of connecting rod and inflation regulating part for spacing seat receives the power of inflation regulating part and can support through the connecting rod, makes the position of spacing seat more stable.

The present invention in a preferred example may be further configured to: the end part of the adjusting rod close to the die lip adjusting groove is arranged in a ball head mode.

Through above-mentioned technical scheme, the setting of bulb for adjusting the conflict of pole and die lip adjustment groove lateral wall and transferring through the point contact, the regulation of adjusting the pole, it is more accurate to make the regulation region in die lip clearance, thereby makes the precision of die lip clearance adjustment higher.

The present invention in a preferred example may be further configured to: heating pipes are arranged on the upper die body and the lower die body, and a heating oil way is transversely arranged at one end of the lower die body, which is close to the gap discharge end of the die lip, along the lower die body.

Through above-mentioned technical scheme, when actually producing the PVB film, the die lip clearance exit is poor because of the heating effect, appears the substandard product easily when leading to the product to extrude. Set up heating oil circuit, heating oil circuit can heat the raw materials of die lip clearance exit through hot oil for the product is extruded more stably.

Compared with the prior art, the invention has the beneficial effects that:

(1) by arranging the expansion adjusting piece, the die lip gap can be finely adjusted, so that the adjusting precision is higher;

(2) by arranging the positioning circular groove and the adjusting ball, the axial positioning of the expansion pipe is more accurate, the adjusting precision of the expansion pipe on the adjusting rod is more accurate, and the die lip gap adjusting precision is better;

(3) through setting up the through-hole for the change of adjusting the ball is more convenient, makes holistic use more lasting stable.

Drawings

FIG. 1 is a general schematic view of a first embodiment;

fig. 2 is a schematic structural view of an expansion adjustment member and a limiting member according to a first embodiment;

fig. 3 is a schematic structural view of an expansion adjustment member and a limiting member according to a second embodiment;

FIG. 4 is a schematic structural view of an expansion adjustment member and a limiting member according to a third embodiment;

fig. 5 is an enlarged view of a portion a of fig. 4.

Reference numerals: 1. feeding a mold body; 2. a lower die body; 3. die lip clearance; 4. heating the oil path; 5. a fixing plate; 6. a die lip adjustment groove; 7. a sliding hole; 8. an expansion adjustment member; 81. adjusting a rod; 82. an expansion tube; 821. a pipe body; 822. a limiting column; 9. fixing a column; 10. a heating rod; 11. a limiting member; 111. a limiting seat; 112. a limit bolt; 113. adjusting the ball; 12. a connecting rod; 13. wiring grooves; 14. a positioning column; 15. positioning the circular groove; 16. an adjustment groove; 17. and a through hole.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

The first embodiment is as follows:

a sheet extrusion die, as shown in figure 1 and figure 2, comprises an upper die body 1 with an upper die lip and a lower die body 2 with a lower die lip, wherein the upper die lip and the lower die lip are spliced to form a die lip gap 3. Heating pipes (not shown) are arranged on the upper die body 1 and the lower die body 2, the heating pipes heat the die through electrification, and a temperature sensor is connected to the heating pipes to accurately control the heating temperature of the heating pipes. Heating oil circuit 4 has transversely been seted up along lower die body 2 to the one end department of the lower die body 2 of being close to the ejection of compact of die lip clearance 3, and heating oil circuit 4 can heat die lip clearance 3 exit through logical hot oil. During the actual use, go up the mould 1 and the concatenation of mould 2 back, go up mould 1 and the horizontal both sides of mould 2 and pass through fixed plate 5 fixed, cover the side of die lip clearance 3 and close.

As shown in fig. 2, a die lip adjusting groove 6 is formed in one side of the upper die body 1, which is away from the lower die body 2, the die lip adjusting groove 6 transversely penetrates through the upper die body 1 along the upper die body 1, and the upper die body 1 is provided with a plurality of sliding holes 7 at transverse intervals. Each sliding hole 7 is correspondingly provided with an expansion adjusting part 8, and each expansion adjusting part 8 comprises an adjusting rod 81 and an expansion pipe 82. Adjust pole 81 coaxial sliding connection in the setting of sliding hole 7, the one end of adjusting pole 81 is contradicted and is close to the lateral wall setting in die lip clearance 3 in die lip adjustment groove 6. The end part of the adjusting rod 81 close to the die lip adjusting groove 6 is arranged like a ball head, and one end of the adjusting rod 81 far away from the die lip adjusting groove 6 is coaxially fixed with a fixing column 9. The expansion pipe 82 is arranged at one end, far away from the die lip adjusting groove 6, of the adjusting rod 81, the heating rod 10 is arranged in the expansion pipe 82, and the expansion pipe 82 is coaxially sleeved on the fixing column 9, so that the expansion pipe 82 and the adjusting rod 81 are coaxially arranged.

The upper die body 1 is further provided with a limiting member 11, the limiting member 11 includes a limiting seat 111, and the limiting seat 111 is located at one end of the expansion pipe 82 far away from the adjusting rod 81 and abuts against the expansion pipe 82 to limit the position of the expansion pipe 82. A plurality of connecting rods 12 are fixedly connected between the limiting seat 111 and the upper die body 1, the axis of the connecting rod 12 is parallel to the axis of the expansion adjusting piece 8, the connecting rods 12 are respectively arranged at two sides of the expansion pipe 82, and the limiting seat 111 is connected and fixedly connected to the upper die body 1 through the connecting rods 12.

When the die lip clearance 3 needs to be adjusted, the heating rod 10 is electrified to control the expansion pipe 82 to be stable, so that the size of the expansion pipe 82 is finely adjusted through expansion with heat and contraction with cold, and the adjusting rod 81 is enabled to push the side wall of the die lip adjusting groove 6 to adjust the die lip clearance 3.

Example two:

a sheet extrusion die differs from the first embodiment in that the structure of the limiting member 11 is different.

As shown in fig. 3, the limiting member 11 includes a limiting seat 111 and a limiting bolt 112. The limiting seat 111 is fixed on the upper die body 1 through the connecting rod 12, and the limiting seat 111 is located at one end of the expansion pipe 82 far away from the adjusting rod 81. The number and positions of the limit bolts 112 are arranged in one-to-one correspondence with the expansion adjustment members 8. The limiting bolt 112 is in threaded connection with the limiting seat 111, the limiting bolt 112 and the corresponding expansion pipe 82 are coaxially arranged, and the limiting bolt 112 is located at one end, far away from the adjusting rod 81, of the expansion pipe 82 and abuts against the end, far away from the adjusting rod 81, of the expansion pipe 82 to limit the position of the expansion pipe 82.

When the expansion adjusting pieces 8 are installed, the limiting bolts 112 abut against one ends, far away from the adjusting rod 81, of the expansion pipes 82, and the limiting bolts 112 can be used for installing and positioning each expansion adjusting piece 8, so that the installation of each expansion adjusting piece 8 is more accurate.

Example three:

a sheet extrusion die differs from the first embodiment in that the expansion pipe 82 and the limiting member 11 have different structures.

As shown in fig. 4 and 5, the expansion tube 82 includes a tube body 821 coaxially disposed on the adjustment rod 81 and a stopper 822 coaxially disposed at one end of the tube body 821 distant from the adjustment rod 81, and the heating rod 10 is disposed in the tube body 821. The pipe 821 has a wiring groove 13 at one end thereof near the limiting pillar 822, and the wiring groove 13 radially penetrates through the side wall of the pipe 821 to allow a wire of the heating rod 10 to pass through. Limiting column 822 is a cylinder and is arranged to be equal to the diameter of tube 821, positioning column 14 is coaxially fixed on the end surface of limiting column 822 close to tube 821, and positioning column 14 is coaxially inserted into tube 821 to coaxially arrange limiting column 822 and tube 821. One end of the limiting column 822 far away from the adjusting rod 81 is coaxially provided with a positioning circular groove 15.

As shown in fig. 4 and 5, the limiting member 11 includes a limiting seat 111, a limiting bolt 112, and an adjusting ball 113. The limiting seat 111 is fixed on the upper die body 1 through the connecting rod 12, and the limiting seat 111 is located at one end of the expansion pipe 82 far away from the adjusting rod 81. The number and positions of the limit bolts 112 are arranged in one-to-one correspondence with the expansion adjustment members 8. The limit bolt 112 is in threaded connection with the limit seat 111, and the limit bolt 112 and the corresponding expansion pipe 82 are coaxially arranged. Spacing seat 111 has been seted up near expansion tube 82 terminal surface regulating groove 16, and regulating groove 16 quantity and position and the hole 7 one-to-one setting that slides, and every regulating groove 16 sets up with the hole 7 that slides that corresponds is coaxial, and the diameter of regulating groove 16 is greater than the diameter setting of expansion tube 82. The adjusting ball 113 is slidably connected in the adjusting groove 16, the diameter of the adjusting ball 113 is the same as that of the adjusting groove 16, and the diameter of the adjusting ball 113 is larger than that of the positioning circular groove 15. The number of the adjusting balls 113 in each adjusting groove 16 is two, the adjusting balls 113 are located between the corresponding expansion pipe 82 and the limiting bolt 112, and the limiting bolt 112 enables the adjusting balls 113 close to the expansion pipe 82 to be tightly abutted on the positioning circular groove 15 for positioning.

The diameter of the limiting bolt 112 is smaller than that of the adjusting groove 16, the limiting seat 111 is provided with through holes 17, the number and the position of the through holes 17 correspond to the adjusting groove 16 one by one, and the diameter of the through holes 17 is larger than or equal to that of the adjusting groove 16. The axis of each through hole 17 intersects with and is disposed perpendicularly to the axis of the corresponding adjustment groove 16, and the axis of the through hole 17 is located on the side of the adjustment ball 113 remote from the expansion tube 82.

During the actual use, the one end of expansion pipe 82 and the coaxial setting of regulation pole 81, the other end of expansion pipe 82 supports tight regulation ball 113 through spacing bolt 112 and imbeds location circular slot 15 with regulation ball 113 part, make regulation ball 113 and location circular slot 15 form line contact and fix a position, make the centre of sphere of regulation ball 113 be located the axis of expansion pipe 82, then through the coaxial setting of adjustment groove 16 and hole 7 that slides, adjustment groove 16 fixes a position regulation ball 113 and makes the axis of expansion pipe 82 be in the coaxial state with hole 7 that slides in the inflation regulation process.

The force of the limiting bolt 112 abutting against the adjusting ball 113 is transmitted to the adjusting ball 113 of the fitting and positioning circular groove 15 through the adjusting ball 113 close to the limiting bolt 112, the limiting bolt 112 is connected to the limiting seat 111 in a threaded manner, the precision of threaded fit is insufficient, the force abutting against the adjusting ball 113 forms radial component force to a certain extent, the limiting bolt 112 transmits the force to the adjusting ball 113 of the fitting and positioning circular groove 15 through the adjusting ball 113, the position where the two adjusting balls 113 abut against each other is located at the connecting line of the axes of the two adjusting balls 113 by the restriction of the adjusting groove 16, so that the abutting points of the two adjusting balls 113 are located on the axis of the adjusting groove 16, and after the abutting force of the limiting bolt 112 is transmitted through the adjusting balls 113, so that the abutting force of the adjusting ball 113 abutting against the positioning circular groove 15 is along the axial state of the expansion pipe 82, thereby the condition of expansion pipe 82 radial deformation in the use has been reduced for holistic use is more durable and die lip clearance 3 adjustment precision is higher.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a sheet extrusion die head, is including last die body (1) that has last die lip and lower die body (2) that have lower die lip, goes up die lip and lower die lip concatenation and forms die lip clearance (3), goes up die body (1) and deviates from one side of die body (2) down and has seted up die lip adjustment tank (6), it is provided with a plurality of holes (7), its characterized in that slide to go up die body (1) along transverse interval: each sliding hole (7) is correspondingly provided with an expansion adjusting piece (8), and each expansion adjusting piece (8) comprises an adjusting rod (81) and an expansion pipe (82); the adjusting rod (81) is coaxially connected with the sliding hole (7) in a sliding mode, and one end of the adjusting rod (81) abuts against the side wall, close to the die lip gap (3), of the die lip adjusting groove (6); the expansion pipe (82) is coaxially arranged at one end, away from the die lip adjusting groove (6), of the adjusting rod (81), and a heating rod (10) is arranged in the expansion pipe (82);

the upper die body (1) is also provided with a limiting piece (11), and the limiting piece (11) comprises a limiting seat (111) fixedly connected to the upper die body (1);

the limiting piece (11) further comprises limiting bolts (112) which are in threaded connection with the limiting seat (111), and the number and the positions of the limiting bolts (112) are arranged in one-to-one correspondence with the expansion adjusting pieces (8); the limiting bolt (112) and the corresponding expansion pipe (82) are coaxially arranged, and the limiting bolt (112) is positioned at one end, far away from the adjusting rod (81), of the expansion pipe (82) to limit the position of the expansion pipe (82);

one end of the expansion pipe (82) far away from the adjusting rod (81) is coaxially provided with a positioning circular groove (15); the end face, close to the expansion pipe (82), of the limiting seat (111) is provided with adjusting grooves (16), the number and the positions of the adjusting grooves (16) are arranged in one-to-one correspondence with the sliding holes (7), and each adjusting groove (16) is arranged coaxially with the corresponding sliding hole (7); the limiting piece (11) further comprises an adjusting ball (113) connected in the adjusting groove (16) in a sliding mode, the diameter of the adjusting ball (113) is the same as that of the adjusting groove (16), the diameter of the adjusting ball (113) is larger than that of the positioning circular groove (15), and the limiting bolt (112) abuts against the adjusting ball (113) to be arranged on the positioning circular groove (15); the number of the adjusting balls (113) in each adjusting groove (16) is two;

the diameter of the limiting bolt (112) is smaller than that of the adjusting groove (16), through holes (17) are formed in the limiting seat (111), the number and the position of the through holes (17) are in one-to-one correspondence with the adjusting groove (16), and the diameter of the through holes (17) is larger than or equal to that of the adjusting groove (16); the axis of the through hole (17) is intersected with the axis of the adjusting groove (16) and is vertically arranged, and the axis of the through hole (17) is positioned on one side, away from the expansion pipe (82), of the adjusting ball (113).

2. The sheet extrusion die of claim 1, wherein: expansion pipe (82) including coaxial setting up body (821) on adjusting pole (81) and coaxial setting up in body (821) keep away from spacing post (822) of adjusting pole (81) one end, heater rod (10) are located and set up in body (821), spacing post (822) setting is seted up in location circular slot (15), wiring groove (13) have been seted up to body (821) one end that is close to spacing post (822), wiring groove (13) are followed body (821) radially runs through its lateral wall setting.

3. The sheet extrusion die of claim 1, wherein: and a connecting rod (12) is fixedly connected between the limiting seat (111) and the upper die body (1), and the axis of the connecting rod (12) is parallel to the axis of the expansion adjusting piece (8).

4. The sheet extrusion die of claim 1, wherein: the end part of the adjusting rod (81) close to the die lip adjusting groove (6) is arranged in a ball head shape.

5. The sheet extrusion die of claim 1, wherein: the heating pipes are arranged on the upper die body (1) and the lower die body (2), and a heating oil way (4) is transversely arranged at one end of the lower die body (2), which is close to the discharge end of the die lip gap (3), along the lower die body (2).