阅读说明：本技术 一种复合板生产线用的自动覆膜包装机 (Automatic film-coating packaging machine for composite board production line ) 是由 许就贤 窦庆彬 黄慧达 于 2020-08-24 设计创作，主要内容包括：本发明提供了一种复合板生产线用的自动覆膜包装机,包括支撑柱、安装架、主动辊、从动辊、第一覆膜卷、第一覆膜辊、转动杆、清洁毛刷、吸尘风机以及吸尘管,复合板依次从从动辊以及主动辊与第一覆膜辊之间通过,第一覆膜卷上卷绕有第一薄膜,第一薄膜的一端贴合在复合板的上表面并与复合板同步通过第一覆膜辊,转动杆的一端铰接在安装架的顶壁,另一端与清洁毛刷的一端固定连接,清洁毛刷的另一端贴合于复合板的上表面,吸尘风机固定安装在安装架的顶部,吸尘管的一端与吸尘风机的进风口连通,另一端固定连接在转动杆的靠近清洁毛刷的一端。本发明可以更加彻底地对复合板上表面进行清洁,改善清洁效果,防止复合板覆膜出现气泡的问题。(The invention provides an automatic film-coating packaging machine for a composite board production line, which comprises a supporting column, a mounting frame, a driving roller, a driven roller, a first film-coating roll, a first film-coating roller, a rotating rod, a cleaning hairbrush, a dust-absorbing fan and a dust-absorbing pipe. The invention can clean the upper surface of the composite board more thoroughly, improve the cleaning effect and prevent the problem of bubbles on the laminated film of the composite board.)

1. The utility model provides an automatic tectorial membrane packagine machine that composite sheet production line was used, includes support column, mounting bracket, drive roll, driven voller, first tectorial membrane book and first tectorial membrane roller, mounting bracket fixed mounting be in on the support column, the drive roll the driven voller first tectorial membrane book and first tectorial membrane roller is all rotationally installed on the mounting bracket, first tectorial membrane roller is located directly over the drive roll, the composite sheet follows in proper order the driven voller with the drive roll with pass through between the first tectorial membrane roller, first tectorial membrane book is located directly over the composite sheet, first tectorial membrane book is rolled up and is rolled up there is first film, first film is kept away from the one end laminating of first tectorial membrane book is in the upper surface of composite sheet and with the composite sheet passes through in step first tectorial membrane roller, a serial communication port, automatic tectorial membrane packagine machine that composite sheet production line was used still includes the dwang packagine machine, Clean brush, dust absorption fan and dust absorption pipe, the one end of dwang articulates the roof of mounting bracket, the other end of dwang with the one end fixed connection of clean brush, the other end laminating of clean brush in the upper surface of composite sheet, dust absorption fan fixed mounting be in the top of mounting bracket, the one end of dust absorption pipe with the air intake intercommunication of dust absorption fan, the other end fixed connection of dust absorption pipe is close to of dwang the one end of clean brush.

2. The automatic film covering and packaging machine for composite board production line according to claim 1, the automatic film-coating packaging machine for the composite board production line also comprises a spiral spring, a first shell, a first push rod and a first adjusting bolt, the first shell is fixedly arranged on the top wall of the mounting rack and is provided with a first inner cavity, the first inner cavity is filled with first liquid, one end of the first adjusting bolt extends into the first inner cavity and is in threaded connection with the top wall of the mounting rack and the side wall of the first inner cavity close to the top wall of the mounting rack, one end of the first push rod extends into the first inner cavity and is in sliding sealing connection with the side wall of the top wall of the first inner cavity, which is far away from the mounting rack, the other end of the first push rod is fixedly connected with one end of the spiral spring, and the other end of the spiral spring is fixedly connected with the rotating rod.

3. The automatic film mulching and packaging machine for the composite board production line according to claim 2, further comprising a second adjusting bolt, wherein one end of the second adjusting bolt extends into the first inner cavity and is slidably and hermetically connected with the side wall of the top wall of the mounting frame.

4. The automatic film mulching and packaging machine for the composite board production line according to claim 3, wherein the first adjusting bolt has a diameter larger than that of the first push rod, and the second adjusting bolt has a diameter smaller than that of the first push rod.

5. The automatic film covering and packaging machine for the composite board production line according to claim 4, further comprising a set of clamping mechanisms mounted on the mounting frame, wherein the clamping mechanisms are oppositely disposed and located at two sides of the composite board, each clamping mechanism comprises a second housing, a third adjusting bolt, a second push rod and a clamping plate, the second housing is fixedly mounted on the mounting frame, the second housing is provided with a second inner cavity, a second liquid is filled in the second inner cavity, one end of the third adjusting bolt extends into the second inner cavity and is in threaded connection with the side wall of the second housing far away from the composite board, and one end of the second push rod extends into the second inner cavity and is in sliding and sealing connection with the second inner cavity close to the side wall of the composite board, the other end of the second push rod is fixedly connected with the clamping plate.

6. The automatic film laminating and packaging machine for a composite board manufacturing line according to claim 5, further comprising a second film laminating roll rotatably mounted on said mounting frame and located directly below said composite board.

7. The automatic laminating and packaging machine for the composite board production line according to claim 6, wherein a second film is wound on the second laminating roll, and one end of the second film, which is far away from the second laminating roll, is attached to the lower surface of the composite board and passes through the driving roller synchronously with the composite board.

8. The automatic laminating and packaging machine for a composite sheet manufacturing line according to claim 7, wherein said first laminating roll is positioned between said driven roll and said first laminating roll, and said second laminating roll is positioned between said driven roll and said driving roll.

9. The automatic film mulching and packaging machine for the composite board production line according to claim 8, wherein the automatic film mulching and packaging machine for the composite board production line further comprises a fourth adjusting bolt, and one end of the fourth adjusting bolt extends into the second inner cavity and is in threaded connection with the side wall of the second inner cavity, which is far away from the composite board.

10. The automatic film mulching and packaging machine for the composite board production line according to claim 9, wherein the third adjustment bolt has a diameter larger than that of the second push rod, and the fourth adjustment bolt has a diameter smaller than that of the second push rod.

Technical Field

The invention relates to the technical field of composite boards, in particular to an automatic film-coating packaging machine for a composite board production line.

Background

The composite board is a board formed by layering different materials with different functions, and can be generally divided into a metal composite board, a wood composite board, a color steel composite board, a rock wool composite board and the like. After the composite board is produced, the surface of the composite board is easily scratched or abraded in the processes of stacking, packaging and transportation. In order to avoid scratching or abrasion of the surfaces of the composite boards in the processes of stacking, packaging and transportation and keep the surfaces of the composite boards clean, the composite boards are subjected to film coating operation by a film coating and packaging machine after being generated. The composite board film covering and packaging machine generally comprises a driven roller, a driving roller, a film covering roller and a film covering roll, wherein a gap is formed between the film covering roller and the driving roller so that the composite board can pass through the gap, and a film on the film covering roll is attached to the composite board and synchronously passes through the film covering roller with the composite board, so that the film covering operation on the surface of the composite board can be completed.

The composite board is easy to generate bubbles when being coated, and the reasons are many, such as the surface of the composite board is not clean and the tightness of the film is not enough. Whether the surface of the composite board is cleaned in place or not is a key factor that bubbles cannot be generated in the process of laminating the composite board. The existing automatic film covering and packaging machine for the composite board generally utilizes a cleaning brush to clean the surface of the composite board before film covering is carried out on the composite board so as to remove dust or metal debris particles and other impurities on the surface of the composite board. However, the existing automatic laminating packaging machine for composite boards only utilizes the cleaning brush to clean the surface of the composite board, dust is easy to adhere and deposit on the cleaning brush, and the cleaning effect of the surface of the composite board is further influenced, and the cleaning effect is not ideal and needs to be further improved.

Disclosure of Invention

Based on the technical scheme, the invention provides the automatic film covering packaging machine for the composite board production line, which aims to solve the problem that the cleaning effect of the existing automatic film covering packaging machine for the composite board is not ideal, and the specific technical scheme is as follows:

the utility model provides an automatic tectorial membrane packagine machine that composite sheet production line was used, includes support column, mounting bracket, drive roll, driven voller, first tectorial membrane book and first tectorial membrane roller, mounting bracket fixed mounting be in on the support column, the drive roll the driven voller first tectorial membrane book and first tectorial membrane roller is all rotationally installed on the mounting bracket, first tectorial membrane roller is located directly over the drive roll, the composite sheet follows in proper order the driven voller with pass through between the drive roll and the first tectorial membrane roller, first tectorial membrane book is located directly over the composite sheet, first tectorial membrane book is rolled up and is rolled up there is first film, first film is kept away from the laminating of one end that first tectorial membrane was rolled up the upper surface of composite sheet and with the composite sheet passes through in step first tectorial membrane roller, automatic tectorial membrane packagine machine that composite sheet production line was used still includes dwang, first tectorial membrane roller, Clean brush, dust absorption fan and dust absorption pipe, the one end of dwang articulates the roof of mounting bracket, the other end of dwang with the one end fixed connection of clean brush, the other end laminating of clean brush in the upper surface of composite sheet, dust absorption fan fixed mounting be in the top of mounting bracket, the one end of dust absorption pipe with the air intake intercommunication of dust absorption fan, the other end fixed connection of dust absorption pipe is close to of dwang the one end of clean brush.

In above-mentioned automatic film packaging machine, the composite sheet passes through between driven voller and drive roll and the first tectorial membrane roller from driven voller and drive roll in proper order, and the composite sheet is removed by the driven voller toward the drive roll direction, and the dwang is down drooping under the action of gravity, and the laminating of clean brush is in order to clean the composite sheet upper surface at the upper surface of composite sheet. After dust impurity of composite sheet upper surface is peeled off by cleaning brush and is swept away, dust absorption fan is taken out dust impurity through the dust absorption pipe, avoids dust impurity adhesion deposit on cleaning brush, so can clean the composite sheet upper surface more thoroughly, improves clean effect, prevents that the problem of bubble from appearing in the composite sheet tectorial membrane.

Further, automatic film covering and packaging machine that composite sheet production line was used still includes coil spring, first shell, first push rod and first adjusting bolt, first shell fixed mounting be in the roof of mounting bracket, first shell is equipped with first inner chamber, it has first liquid to fill in the first inner chamber, first adjusting bolt's one end stretch into first inner chamber and with the roof of mounting bracket and first inner chamber is close to the lateral wall threaded connection of the roof of mounting bracket, the one end of first push rod stretch into first inner chamber and with first inner chamber is kept away from the lateral wall sliding seal of the roof of mounting bracket connects, the other end of first push rod with coil spring's one end fixed connection, coil spring's the other end with dwang fixed connection.

Further, automatic film covering and packaging machine that composite sheet production line was used still includes second adjusting bolt, the one end of second adjusting bolt stretch into first inner chamber and with the lateral wall sliding seal of the roof of mounting bracket is connected.

Further, the diameter of the first adjusting bolt is larger than that of the first push rod, and the diameter of the second adjusting bolt is smaller than that of the first push rod.

Further, automatic tectorial membrane packagine machine that composite sheet production line was used still includes a set of installation fixture on the mounting bracket, and is a set of fixture sets up relatively and is located the both sides of composite sheet, a set of fixture all includes second shell, third adjusting bolt, second push rod and splint, second shell fixed mounting is in on the mounting bracket, the second shell is equipped with the second inner chamber, it has second liquid to fill in the second inner chamber, third adjusting bolt's one end stretches into the second inner chamber and with the second shell is kept away from the lateral wall threaded connection of composite sheet, the one end of second push rod stretches into the second inner chamber and with the second inner chamber is close to the lateral wall sliding seal of composite sheet connects, the other end of second push rod with splint fixed connection.

Further, automatic film covering and packaging machine that composite sheet production line was used still includes the second tectorial membrane book, the second tectorial membrane book rotationally install on the mounting bracket and be located under the composite sheet.

Furthermore, a second film is wound on the second film-coated roll, and one end, far away from the second film-coated roll, of the second film is attached to the lower surface of the composite board and synchronously passes through the driving roller together with the composite board.

Further, the first film laminating roll is located between the driven roll and the first film laminating roll, and the second film laminating roll is located between the driven roll and the driving roll.

Further, automatic film covering and packaging machine that composite sheet production line was used still includes fourth adjusting bolt, fourth adjusting bolt's one end stretch into the second inner chamber and with the second inner chamber is kept away from the lateral wall threaded connection of composite sheet.

Further, the diameter of the third adjusting bolt is larger than that of the second push rod, and the diameter of the fourth adjusting bolt is smaller than that of the second push rod.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

Fig. 1 is a schematic overall structure diagram of an automatic film covering and packaging machine for a composite board production line according to an embodiment of the present invention;

fig. 2 is a schematic overall structure diagram of an automatic film covering and packaging machine for a composite board production line according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic diagram illustrating a structural relationship between a clamping mechanism and a mounting frame of an automatic laminating and packaging machine for a composite board production line according to an embodiment of the present invention;

FIG. 5 is a first schematic structural diagram of a clamping mechanism of an automatic laminating and packaging machine for a composite board production line according to an embodiment of the present invention;

fig. 6 is a schematic view showing the overall structure of an automatic film covering and packaging machine for a composite board production line according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a clamping mechanism of an automatic laminating and packaging machine for a composite board production line according to an embodiment of the present invention.

Description of reference numerals:

1. a support pillar; 2. a mounting frame; 3. a drive roll; 4. a driven roller; 5. a first film-covered roll; 6. a first laminating roller; 7. rotating the rod; 8. cleaning the brush; 9. a dust collection fan; 10. a dust collection pipe; 11. a coil spring; 12. a first housing; 13. a first push rod; 14. a first adjusting bolt; 15. a first lumen; 16. a second adjusting bolt; 17. a clamping mechanism; 18. a second housing; 19. a third adjusting bolt; 20. a second push rod; 21. a splint; 22. a second lumen; 23. a second film-covered roll; 24. a fourth adjusting bolt; 25. a pulley.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.

As shown in fig. 1, an automatic film covering and packaging machine for a composite board production line according to an embodiment of the present invention includes a supporting column 1, a mounting frame 2, a driving roller 3, a driven roller 4, a first film covering roll 5, and a first film covering roller 6, wherein the supporting column 1 is fixedly mounted on the ground, and the mounting frame 2 is fixedly mounted on the supporting column 1. The driving roller 3, the driven roller 4, the first film-coated roll 5 and the first film-coated roller 6 are rotatably mounted on the mounting frame 2. Specifically, mounting bracket 2 is the square frame form, including epipleural, lower side plate and install left side board and right side board between epipleural and lower side plate perpendicularly, mounting bracket 2 is in through lower side plate fixed mounting on the support column 1, drive roll 3 driven roll 4 first tectorial membrane book 5 and first tectorial membrane roller 6 all rotationally installs between left side board and right side board. First tectorial membrane roller 6 is located directly over drive roll 3, the composite sheet follows in proper order driven voller 4 with drive roll 3 with pass through between the first tectorial membrane roller 6, first tectorial membrane is rolled up 5 and is located directly over the composite sheet, it has first film to roll up on the first tectorial membrane roll 5, first film is kept away from the laminating of the one end that 5 was rolled up to first tectorial membrane is in the upper surface of composite sheet, first film with the composite sheet passes through in step first tectorial membrane roller 6.

As shown in fig. 1, automatic film coating packaging machine that composite sheet production line was used still includes dwang 7, clean brush 8, dust absorption fan 9 and dust absorption pipe 10, the one end of dwang 7 articulates the roof of mounting bracket 2, the other end of dwang 7 with the one end fixed connection of clean brush 8, the other end of clean brush 8 laminates in the upper surface of composite sheet, dust absorption fan 9 fixed mounting be in the top of mounting bracket 2, the one end of dust absorption pipe 10 with the air intake intercommunication of dust absorption fan 9, the other end fixed connection of dust absorption pipe 10 is close to of dwang 7 the one end of clean brush 8. Specifically, dwang 7 is articulated with the upside board, dust absorption fan 9 is installed on the upside board, dwang 7, clean brush 8 and dust absorption pipe 10 all are located the driven voller 4 with between the drive roll 3.

In above-mentioned automatic film packaging machine, the composite sheet passes through between driven voller 4 and drive roll 3 and the first tectorial membrane roller 6 in proper order, and the composite sheet is moved by driven voller 4 toward 3 directions of drive roll, and dwang 7 is down drooping under the action of gravity, and the laminating of clean brush 8 is in order to clean the composite sheet upper surface at the upper surface of composite sheet. After the dust impurity of composite sheet upper surface is peeled off by cleaning brush 8 and is swept away, dust absorption fan 9 is taken out dust impurity through dust absorption pipe 10, avoids dust impurity adhesion deposit on cleaning brush 8, so can clean the composite sheet upper surface more thoroughly, improves clean effect, prevents that the problem of bubble from appearing in the composite sheet tectorial membrane.

In one embodiment, as shown in fig. 2 and 3, the automatic film covering and packaging machine for a composite board production line further includes a coil spring 11, a first housing 12, a first push rod 13, and a first adjusting bolt 14, wherein the first housing 12 is fixedly mounted on the top wall of the mounting frame 2, that is, the first housing 12 is fixedly mounted on the lower surface of the upper side plate. The first shell 12 is provided with a first inner cavity 15, and a first liquid, which may be lubricating grease, is filled in the first inner cavity 15. First adjusting bolt 14's one end stretch into first inner chamber 15 and with the roof of mounting bracket 2 and first inner chamber 15 is close to the lateral wall threaded connection of the roof of mounting bracket 2, the one end of first push rod 13 stretches into first inner chamber 15 and with first inner chamber 15 is kept away from the lateral wall sliding seal of the roof of mounting bracket 2 connects, the other end of first push rod 13 with coil spring 11's one end fixed connection, coil spring 11's the other end with dwang 7 fixed connection.

The arrangement of the spiral spring 11 can increase the friction force between the cleaning brush 8 and the upper surface of the composite board, so as to better strip and clean the dust and impurities adhered to the upper surface of the composite board. And through first adjusting bolt 14, first shell 12 and first push rod 13, then can be through rotating the position of first adjusting bolt 14 one end at first inner chamber 15, adjust the elasticity between helical spring 11 and dwang 7, and then adjust the frictional force between clean brush 8 and the composite sheet upper surface as required, improve its practicality.

In one embodiment, as shown in fig. 3, the automatic film covering and packaging machine for the composite board production line further includes a second adjusting bolt 16, one end of the second adjusting bolt 16 extends into the first inner cavity 15 and is connected with the side wall of the top wall of the mounting frame 2 in a sliding and sealing manner, the diameter of the first adjusting bolt 14 is larger than that of the first push rod 13, and the diameter of the second adjusting bolt 16 is smaller than that of the first push rod 13.

The diameter of the second adjusting bolt 16 is smaller than that of the first push rod 13, and after the position of one end of the first push rod 13 in the first inner cavity 15 is roughly adjusted by the first adjusting bolt 14, the position of one end of the first push rod 13 in the first inner cavity 15 can be finely adjusted by the second adjusting bolt 16. The second adjusting bolt 16 is used in cooperation with the first adjusting bolt 14, so that the position of the first push rod 13 and the elasticity of the spiral spring 11 can be better adjusted, and the friction force between the cleaning brush 8 and the upper surface of the composite board can be more accurately adjusted.

As shown in fig. 4, 5 and 6, the automatic film covering and packaging machine further includes a set of clamping mechanisms 17 installed on the mounting frame 2, the clamping mechanisms 17 are oppositely disposed and located at two sides of the composite board, each clamping mechanism 17 includes a second housing 18, a third adjusting bolt 19, a second push rod 20 and a clamping plate 21, the second housing 18 is fixedly installed on the mounting frame 2, the second housing 18 is provided with a second inner cavity 22, a second liquid is filled in the second inner cavity 22, and the second liquid may be lubricating grease. Third adjusting bolt 19's one end stretch into second inner chamber 22 and with second inner chamber 22 is kept away from the lateral wall threaded connection of composite sheet, third adjusting bolt 19's the other end passes mounting bracket 2 is located the outside of mounting bracket 2, the one end of second push rod 20 stretch into second inner chamber 22 and with second inner chamber 22 is close to the lateral wall sliding seal of composite sheet connects, the other end of second push rod 20 with splint 21 fixed connection.

In above-mentioned automatic film packaging machine, through rotating third adjusting bolt 19, the one end of adjustment third adjusting bolt 19 is in the position of second inner chamber 22, utilize liquid drive second push rod 20 and splint 21 among the second inner chamber 22 to remove, can carry out the centre gripping operation to the composite sheet, and then prescribe a limit to the position of the composite sheet that passes through between driven voller 4 and drive roll 3 and the first tectorial membrane roller 6, make the composite sheet remove more stably, avoid the film to produce the crease because of the composite sheet vibrations, improve the quality of composite sheet tectorial membrane.

In addition, because the positions of the second push rod 20 and the clamping plate 21 can be adjusted by the third adjusting bolt 19, the automatic film covering packaging machine can also carry out film covering packaging operation on composite boards with different widths, and has wide application range and good practicability.

In one embodiment, as shown in fig. 5, the clamping mechanism 17 further comprises a pulley 25, and the pulley 25 is mounted on the surface of the clamping plate 21 contacting the composite plate. The two sides of the composite board are in rolling contact with the pulleys 25, so that the friction force between the composite board and the clamping mechanism 17 can be reduced, and the composite board can better pass through the driven roller 4, the driving roller 3 and the first film coating roller 6.

In one embodiment, as shown in fig. 6, the automatic film-coating packaging machine further includes a second film-coating roll 23, the second film-coating roll 23 is rotatably mounted on the mounting frame 2 and is located right below the composite board, a second film is wound on the second film-coating roll 23, and one end of the second film, which is far away from the second film-coating roll 23, is attached to the lower surface of the composite board and passes through the driving roller 3 synchronously with the composite board.

The lower surface of the composite board can be film-coated and packaged by using the second film-coating roll 23. The second film-coating roll 23 is matched with the first film-coating roll 5, so that the composite board can be subjected to all-sided film-coating packaging, and the application range of the composite board film-coating packaging machine is widened.

In one embodiment, the first film-coating roll 5 is located between the driven roll 4 and the first film-coating roll 6, and the second film-coating roll 23 is located between the driven roll 4 and the driving roll 3. Of course, the positions of the first and second film coating rolls 5 and 23 may be adjusted as needed, and the first and second film coating rolls 5 and 23 may be located between the driven roller 4 and the inlet end of the composite board film coating and packaging machine.

In one embodiment, the diameter of the third adjusting bolt 19 is larger than the diameter of the second push rod 20. As a preferred solution, the diameter of the third adjusting screw 19 is at least twice the diameter of the second push rod 20. Therefore, the positions of the second push rod 20 and the clamping plate 21 can be quickly adjusted by adjusting the position of one end of the third adjusting bolt 19 in the second inner cavity 22, so that the time is saved, and the working efficiency is improved.

In one embodiment, as shown in fig. 7, the composite board film covering and packaging machine further includes a fourth adjusting bolt 24, one end of the fourth adjusting bolt 24 extends into the second inner cavity 22 and is in threaded connection with the second inner cavity 22 away from the side wall of the composite board, the other end of the fourth adjusting bolt 24 penetrates through the mounting frame 2 and is located on the outer side of the mounting frame 2, and the diameter of the fourth adjusting bolt 24 is smaller than that of the second push rod 20.

The diameter of the fourth adjusting bolt 24 is smaller than the diameter of the second push rod 20, and after the positions of the second push rod 20 and the clamping plate 21 are roughly adjusted by the third adjusting bolt 19, the positions of the second push rod 20 and the clamping plate 21 can be finely adjusted by the fourth adjusting bolt 24. Fourth adjusting bolt 24 uses with the cooperation of third adjusting bolt 19, can adjust the position of second push rod 20 and splint 21 better for fixture 17 can better centre gripping composite sheet, avoids the composite sheet to appear rocking the problem at the tectorial membrane in-process.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.