CN113681871A

CN113681871A - Device for preventing inferior gram force panel leads to bubble because of roast board time overlength

Info

Publication number: CN113681871A
Application number: CN202111237467.4A
Authority: CN
Inventors: 戴忠; 赵锋
Original assignee: Gaoyu Intelligent Sanitary Technology Jiangsu Co ltd
Current assignee: Gaoyu Intelligent Sanitary Technology Jiangsu Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2021-11-23
Anticipated expiration: 2041-10-25
Also published as: CN113681871B

Abstract

The invention provides a device for preventing acrylic plates from causing bubbles due to overlong baking time, which belongs to the technical field of acrylic plate processing equipment and aims to solve the problems that when the acrylic plates are heated by the conventional acrylic baking plate bending equipment, the bending time and the temperature of a heating assembly are not easy to control, the periphery of a baking line is not easy to dissipate heat, the area near the baking line cannot be cooled in time even if the baking line assembly can be closed in time, and after heating is stopped, the acrylic plates are bent on an operation table and are influenced by the heat of the operation table, and the acrylic plates can also cause bubbles; the hot bending device comprises a hot bending table, wherein the front side and the rear side of the hot bending table are respectively and fixedly connected to the inner side surfaces of two side supporting frames; it can be seen that the seam baking and the peripheral area cooling can be accelerated, the influence of the seam baking and the peripheral area cooling on the acrylic plate which is bent above is reduced, and the phenomenon that the plate body foams due to the time process of plate baking is avoided.

Description

Device for preventing inferior gram force panel leads to bubble because of roast board time overlength

Technical Field

The invention belongs to the technical field of acrylic plate processing equipment, and particularly relates to a device for preventing bubbles of acrylic plates caused by overlong plate baking time.

Background

The acrylic bending is a common process in acrylic products, the bending is made of air bubbles and acrylic materials, the temperature and the time are related, and the bent product is made of a common new material and is poured into a plate. Foaming is not easy with respect to the compression plate; too high roast line temperature also has the bubble, and the temperature is adjusted according to panel and thickness, and the time is short enough that the effect is not good to bend to the temperature, and the inferior gram force board just has the bubble for too long time.

Based on the above description, and combine the structure discovery among the prior art, like current ya keli roast board equipment of bending when heating the ya keli board, bend the position of bending of plate body through the roast line, and bending time and the subassembly temperature of heating are difficult to control, roast line peripheral temperature is too high simultaneously, be difficult to the heat dissipation, even can in time close roast line subassembly, also can not in time cool off near roast line region, after stopping heating, the ya keli board is in the operation panel in-process of bending, receive the influence of the heat degree of operation panel, can lead to the ya keli board plate body to blister equally.

Disclosure of Invention

In order to solve the technical problems, the invention provides a device for preventing acrylic plates from generating bubbles due to overlong baking time, so as to solve the problems that when the acrylic plates are heated by the conventional acrylic baking plate bending equipment, the bending positions of the plates are bent by baking wires, the bending time and the temperature of a heating assembly are not easy to control, the peripheral temperature of the baking wires is overhigh and heat dissipation is not easy, the areas near the baking wires cannot be cooled in time even if the baking wire assemblies can be closed in time, and the acrylic plates are influenced by the heat of an operating table in the bending process of the acrylic plates on the operating table after heating is stopped, and the acrylic plates are also foamed.

The invention relates to a device for preventing bubbles of acrylic plates caused by overlong plate baking time, which has the advantages that the purpose and the effect are achieved by the following specific technical means: a device for preventing bubbles of acrylic plates caused by overlong plate baking time comprises a hot bending table, wherein the front side and the rear side of the hot bending table are respectively and fixedly connected to the inner side surfaces of two side supporting frames; the control console is fixedly connected to the front surface of the side support frame; the front end and the rear end of the lower bearing table are respectively and fixedly connected to the inner side surfaces of the two side supporting frames; the telescopic driving piece is provided with two positions, the seat bodies of the two telescopic driving pieces are fixedly connected below the lower bearing table through bolts, and the output end of the telescopic driving piece is fixedly connected with and drives the lifting heating pipe; the circulation frame is provided with two positions which are fixedly connected to two sides of the lower surface of the hot bending table respectively; the movable partition plate is connected to the inner side of the side support frame in a sliding manner, the bottom of the movable partition plate is connected to the synchronizing wheel through a gear rack in a transmission manner, and the movable partition plate is provided with two positions which are respectively arranged on the left side and the right side of the side support frame; the bottom of the lifting heating pipe is connected on the lower bearing table in a sliding manner, and two sides of the lifting heating pipe are meshed with the transmission synchronizing wheel through a gear rack; and the cooling fan is fixedly connected inside the circulation frame through screws.

Furthermore, the side support frame comprises a transverse guide frame, the transverse guide frame is fixedly connected to the inner surface of the side support frame through welding, and the transverse guide frame is of a rectangular strip structure.

Furthermore, the lower bearing table comprises two synchronous shafts, and the two synchronous shafts are respectively and rotatably connected to two sides of the upper surface of the lower bearing table through bearings; the cylinder table is provided with two positions which are respectively arranged at the front side and the rear side of the lower surface of the lower bearing table; the lifting guide holes are divided into four parts and are all arranged on the surface of the lower bearing table.

Furthermore, the synchronizing shaft comprises two synchronizing wheels, and the two synchronizing wheels are respectively and fixedly connected to two ends of the synchronizing shaft.

Furthermore, an air duct is arranged between the circulation frame and the hot bending platform, the circulation frame comprises an outer cooling opening, and the outer cooling opening is formed in the position of an outlet below the air duct between the circulation frame and the hot bending platform; the upper cooling port is formed at an inlet position above the air duct between the circulating frame and the hot bending platform; and the cooling inlet is arranged on the inner side direction of the cooling fan of the circulation frame.

Furthermore, the movable partition plate comprises upper partition strips, the upper partition strips are arranged on the inner side of the movable partition plate, and the upper partition strips on the two movable partition plates are respectively provided with a groove and a convex strip structure; the side guide wheel frame is fixedly connected to the front side edge and the rear side edge of the movable partition plate; and the driven rack is fixedly connected to the front side and the rear side of the lower surface of the movable partition plate through welding.

Furthermore, the lifting heating pipe comprises a pipe end connecting plate, the pipe end connecting plate is provided with two positions, and the two pipe end connecting plates are respectively and fixedly connected to two ends of the lifting heating pipe.

Further, the pipe end connecting plate comprises a pushing block, and the pushing block is fixedly connected to the outer surface of the pipe end connecting plate; and the side driving rack is fixedly connected to the left side and the right side of the pipe end connecting plate through welding.

Further, cooling blower includes fan travel switch, and fan travel switch passes through electric connection line and connects cooling blower, and fan travel switch is normally open contact, and fan travel switch fixed connection is on the cavity hypoplastron outward flange of circulation frame.

Compared with the prior art, the invention has the following beneficial effects: through the cooperation of the flexible driving piece of this structure and lift heating pipe, heat the acrylic plate through hot curved platform, the baking, the control cabinet is used for setting for roast board time, after the baking to the time of setting for, the flexible driving piece shrink of control cabinet control, drive lift heating pipe downstream, thereby drive control lift heating pipe downstream, and the distance grow between the acrylic plate, in-process bending the acrylic plate, the lift heating pipe continues to descend, make the lift heating pipe continue to reduce the effect of heating of acrylic plate.

Through the cooperation of the synchronizing wheel and the driven rack of the structure, in the descending process of the lifting heating pipe, the side driving rack moves downwards to form gear-rack transmission with the synchronizing wheel to drive the synchronizing wheel to rotate with the synchronizing shaft, the driven rack is meshed with the gear on the other side of the synchronizing wheel to drive the driven rack to move inwards through gear rotation, and in the moving process, the side guide wheel rolls on the transverse guide frame to reduce friction and noise and play a role in guiding.

Through the matching of the movable partition board, the cooling fan and the circulation frame, the two movable partition boards at the two sides continuously move towards the middle to ensure that the upper partition strips at the two positions are butted, thereby cutting off the passage between the lifting heating pipe and the acrylic plate and further stopping heating the acrylic plate in the bending process, when the movable clapboard moves to the inner end, the fan travel switch is triggered by the folded plate of the inner cavity of the movable clapboard, the fan travel switch is closed, the cooling fan is controlled to start, the flowing air is provided to the interior of the roasting front through the cooling inlet, the air enters the channel above the circulating frame from the upper cooling port and then flows out from the outer cooling port to form a circulating channel, the effect of cooling the roasting seam and the peripheral area is achieved, can accelerate to bake seam and peripheral region cooling, alleviate and bake seam and peripheral region cooling and just carry out the ya keli board influence of bending to the top, avoid because roast board time process leads to the plate body to blister.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the internal structure of the present invention.

FIG. 3 is a schematic diagram of the construction of the flow-through rack of the present invention.

Fig. 4 is a schematic front view of fig. 2 according to the present invention.

Fig. 5 is a schematic structural diagram of the lower carrier stage of the present invention.

Fig. 6 is a schematic view of the closed movable partition of the present invention.

Fig. 7 is a partially enlarged view of the structure of fig. 2 a according to the present invention.

Fig. 8 is a partial enlarged structural view of the invention at B of fig. 5.

Fig. 9 is a partially enlarged view of fig. 6C according to the present invention.

Fig. 10 is a partial enlarged view of fig. 6D according to the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows: 1. a hot bending table; 2. a side support frame; 201. a transverse guide frame; 3. a console; 4. a lower bearing table; 401. a synchronizing shaft; 4011. a synchronizing wheel; 402. a cylinder table; 403. lifting guide holes; 5. a telescopic driving member; 6. a flow-through rack; 601. an outer cooling port; 602. an upper cooling port; 603. a cooling inlet; 7. a movable partition plate; 701. an upper partition strip; 702. a side guide wheel; 703. a driven rack; 8. lifting the heating pipe; 801. pipe end connecting plates; 8011. a push block; 8012. a side active rack; 9. a cooling fan; 901. a fan travel switch.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows: as shown in figures 1 to 10: the invention provides a device for preventing bubbles of acrylic plates caused by overlong plate baking time, which comprises a hot bending table 1, wherein the front side and the rear side of the hot bending table 1 are respectively and fixedly connected to the inner side surfaces of two side supporting frames 2; the console 3 is fixedly connected to the front surface of the side support frame 2; the front end and the rear end of the lower bearing table 4 are respectively and fixedly connected to the inner side surfaces of the two side brackets 2, the lower bearing table 4 comprises a synchronizing shaft 401, the synchronizing shaft 401 is provided with two positions, the two synchronizing shafts 401 are respectively and rotatably connected to the two sides of the upper surface of the lower bearing table 4 through bearings, and the two synchronizing wheels 4011 are respectively and fixedly connected to the two ends of the synchronizing shaft 401; the cylinder table 402, the cylinder table 402 has two positions, two cylinder tables 402 are set up in the front and rear sides of lower surface of the lower bearing platform 4 separately; the lifting guide holes 403 are divided into four positions, the four lifting guide holes 403 are all arranged on the surface of the lower bearing table 4, the lower bearing table 4 with the structure is shown in fig. 5, and a synchronizing wheel 4011 of the lower bearing table 4 is meshed with two racks at the same time to realize the synchronous transmission effect; the telescopic driving piece 5 is provided with two positions, the seat bodies of the two telescopic driving pieces 5 are fixedly connected below the lower bearing table 4 through bolts, and the output end of the telescopic driving piece 5 is fixedly connected with and drives the lifting heating pipe 8; the circulation frame 6 is provided with two positions, and the two positions of the circulation frame 6 are respectively and fixedly connected with the two sides of the lower surface of the hot bending platform 1; the movable partition plate 7 is connected to the inner side of the side support frame 2 in a sliding manner, the bottom of the movable partition plate 7 is connected to the synchronizing wheel 4011 through a gear rack in a transmission manner, the movable partition plate 7 is provided with two positions, and the two movable partition plates 7 are respectively arranged on the left side and the right side of the side support frame 2; the bottom of the lifting heating pipe 8 is connected on the lower bearing table 4 in a sliding manner, and two sides of the lifting heating pipe 8 are meshed with the transmission synchronizing wheel 4011 through a gear rack; the cooling fan 9 is fixedly connected to the inside of the flow frame 6 by screws.

Wherein, side brace 2 is including horizontal leading truck 201, and horizontal leading truck 201 passes through welded fastening and connects on the internal surface of side brace 2, and horizontal leading truck 201 is rectangular long strip structure, and horizontal leading truck 201 of this structure is shown as figure 7, and horizontal leading truck 201 is convenient for support side guide wheel 702, plays spacing, the direction function of activity baffle 7 through horizontal leading truck 201.

An air duct is arranged between the circulation frame 6 and the hot bending table 1, the circulation frame 6 comprises an outer cooling port 601, and the outer cooling port 601 is arranged at the position of an outlet below the air duct between the circulation frame 6 and the hot bending table 1; an upper cooling port 602, wherein the upper cooling port 602 is arranged at an inlet position above an air duct between the circulation frame 6 and the hot bending table 1; the cooling inlet 603 and the cooling inlet 603 are arranged in the inner side direction of the cooling fan 9 of the circulation frame 6, as shown in fig. 6, the cooling fan 9 of the circulation frame 6 has a fan travel switch 901, the fan travel switch 901 is connected with the cooling fan 9 through an electrical connection line, and the fan travel switch 901 is a normally open contact, the fan travel switch 901 is fixedly connected to the outer edge of the lower plate of the cavity of the circulation frame 6, the cooling fan 9 of the structure is shown in fig. 3, the fan travel switch 901 is triggered by the inner cavity folded plate of the movable clapboard 7, the fan travel switch 901 is closed, the cooling fan 9 is controlled to start, provide the air that flows through cooling inlet 603 to roast cutting edge of a knife or a sword inside, the air gets into circulation frame 6 top passageway from last cooling hole 602, flows out from outer cooling hole 601 again, forms the circulation passageway, plays the effect of cooling to roast seam and peripheral region, can accelerate roast seam and peripheral region cooling.

The lifting heating pipe 8 comprises a pipe end connecting plate 801, the pipe end connecting plate 801 is provided with two positions, the two pipe end connecting plates 801 are respectively and fixedly connected to two ends of the lifting heating pipe 8, and the pushing block 8011 is fixedly connected to the outer surface of the pipe end connecting plate 801; side initiative rack 8012, side initiative rack 8012 passes through welded fastening and connects in the left and right sides of pipe end even board 801, the lift heating pipe 8 of this structure is as shown in fig. 5, after the baking reaches the time of settlement, control cabinet 3 control flexible driving piece 5 moves down, contract through flexible driving piece 5, will drive lift heating pipe 8 downstream, thereby drive control lift heating pipe 8 and move down, and the distance between the ya keli board increases, in bending the process to the ya keli board, lift heating pipe 8 continues to descend, make lift heating pipe 8 continue to reduce to the effect of heating of ya keli board.

Wherein, the movable clapboard 7 comprises an upper partition strip 701, and the upper partition strip 701 is arranged at the inner side of the movable clapboard 7; the side guide wheel 702, the side guide wheel 702 wheel carrier is fixedly connected with the front side and the rear side of the movable clapboard 7; the driven rack 703, the driven rack 703 is fixedly connected to the front and rear sides of the lower surface of the movable partition plate 7 by welding, the movable partition plate 7 of this structure is as shown in fig. 4, in the descending process of the lifting heating pipe 8, the side driving rack 8012 moves downward to form rack-and-pinion transmission with the synchronizing wheel 4011, and drive the synchronizing wheel 4011 to rotate with the synchronizing shaft 401, on the other side of the synchronizing wheel 4011, the driven rack 703 is engaged with a gear, and the driven rack 703 moves inward by the rotation of the gear, in the moving process, the side guide wheel 702 rolls on the transverse guide frame 201, which can reduce friction and noise, and play a role in guiding, and the two movable partition plates 7 on both sides continuously move toward the middle, so that the upper partition strips 701 on two sides are butted, thereby blocking the passage between the lifting heating pipe 8 and the acrylic plate, and further stopping heating the acrylic plate in the bending process.

Example two: based on the device that the inferior gram force panel that prevents that first embodiment provides leads to the bubble because of roast board time overlength, after the movable partition 7 of the device merges, merge the structural seal performance inadequately, there is the gap easily, combines fig. 2, this a device that prevents inferior gram force panel and lead to the bubble because of roast board time overlength still includes: the movable partition plate 7, the last partition strip 701 on two movable partition plates 7 is equipped with recess and sand grip structure respectively, and through the cooperation of recess and sand grip, thermal revealing of seam crossing can be avoided.

Example three: based on the device that the inferior gram force panel that provides of first embodiment leads to the bubble because of roast board time overlength, the flexible driving piece 5 in the device can use electronic telescoping cylinder, cylinder and pneumatic cylinder, all can play the effect that the drive lift heating pipe 8 goes up and down.

When in use: firstly, placing an acrylic plate on a hot bending table 1 for heating and baking, after baking for a set time, cutting off the power of a lifting heating pipe 8 to stop heating, controlling a telescopic driving piece 5 to move downwards by a control console 3, shrinking by the telescopic driving piece 5 to drive the lifting heating pipe 8 to move downwards so as to drive and control the lifting heating pipe 8 to move downwards, increasing the distance between the lifting heating pipe and the acrylic plate, continuously descending the lifting heating pipe 8 in the process of bending the acrylic plate so as to continuously reduce the heating effect of the lifting heating pipe 8 on the acrylic plate, continuously descending a side driving rack 8012 in the descending process of the lifting heating pipe 8, forming gear and rack transmission with a synchronizing wheel 4011 to drive the synchronizing wheel 4011 and a synchronizing shaft 401 to rotate, meshing a driven rack 703 with a gear on the other side of the synchronizing wheel 4011, driving the driven rack 703 to move towards the inner side by the gear rotation, in the moving process, the side guide wheel 702 rolls on the transverse guide frame 201, so that friction force and noise can be reduced, and a guiding effect is achieved, the two movable partition plates 7 on the two sides continuously move towards the middle, the upper partition strips 701 on the two positions are butted, a channel between the lifting heating pipe 8 and the acrylic plate is isolated, heating of the acrylic plate in the bending process is further stopped, when the movable partition plates 7 move to the inner end, the fan travel switch 901 is triggered through the folded plates of the inner cavities of the movable partition plates 7, the fan travel switch 901 is closed, the cooling fan 9 is controlled to be started, flowing air is provided for the interior of the baking blade through the cooling inlets 603, the air enters the channel above the circulation frame 6 from the upper cooling port 602 and then flows out from the outer cooling port 601, a circulation channel is formed, the effect of cooling the baking blade and the peripheral area is achieved, and cooling of the baking blade and the peripheral area can be accelerated.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a prevent that inferior gram force panel leads to device of bubble because of roast board time overlength, its characterized in that: the method comprises the following steps: the front side and the rear side of the hot bending platform (1) are respectively and fixedly connected to the inner side surfaces of the two side supporting frames (2); the console (3) is fixedly connected to the front surface of the side support frame (2); the front end and the rear end of the lower bearing table (4) are respectively and fixedly connected to the inner side surfaces of the two side supporting frames (2); the telescopic driving part (5) is provided with two positions, the seat bodies of the two telescopic driving parts (5) are fixedly connected below the lower bearing table (4) through bolts, and the output end of the telescopic driving part (5) is fixedly connected with and drives the lifting heating pipe (8); the circulating frame (6) is provided with two positions, and the two circulating frames (6) are fixedly connected to the two sides of the lower surface of the hot bending table (1) respectively; the movable partition plate (7) is connected to the inner side of the side support frame (2) in a sliding mode, the bottom of the movable partition plate (7) is connected to the synchronizing wheel (4011) through a gear rack in a transmission mode, the movable partition plate (7) is provided with two positions, and the two movable partition plates (7) are respectively arranged on the left side and the right side of the side support frame (2); the bottom of the lifting heating pipe (8) is connected to the lower bearing table (4) in a sliding mode, and two sides of the lifting heating pipe (8) are meshed with the transmission synchronizing wheels (4011) through gear racks; and the cooling fan (9) is fixedly connected inside the circulation frame (6) through a screw.

2. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 1, wherein the apparatus comprises: the side bracket (2) comprises: the transverse guide frame (201), the transverse guide frame (201) is fixedly connected to the inner surface of the side support frame (2) through welding, and the transverse guide frame (201) is of a rectangular long strip structure.

3. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 1, wherein the apparatus comprises: the lower bearing table (4) comprises: the synchronous shaft (401), the synchronous shaft (401) is provided with two positions, and the two positions of the synchronous shaft (401) are respectively and rotatably connected with the two sides of the upper surface of the lower bearing platform (4) through bearings; the cylinder table (402), the cylinder table (402) is provided with two positions, and the two cylinder tables (402) are respectively arranged on the front side and the rear side of the lower surface of the lower bearing table (4); the lifting guide holes (403), the lifting guide holes (403) are divided into four parts, and the four lifting guide holes (403) are all arranged on the surface of the lower bearing table (4).

4. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 3, wherein the apparatus comprises: the synchronizing shaft (401) comprises: synchronizing wheel (4011), synchronizing wheel (4011) are equipped with two, and two synchronizing wheel (4011) are fixed connection respectively at the both ends of synchronizing shaft (401).

5. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 1, wherein the apparatus comprises: circulation frame (6) and hot bend platform (1) between be equipped with the ventiduct, circulation frame (6) including: the outer cooling port (601), the outer cooling port (601) is set up in the position of lower exit of the air channel between hot curved platform (1) and the circulation frame (6); the upper cooling port (602), the upper cooling port (602) is arranged at the inlet position above the air duct between the circulating frame (6) and the hot bending platform (1); and the cooling inlet (603) is formed in the inner side direction of the cooling fan (9) of the circulating frame (6).

6. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 1, wherein the apparatus comprises: the movable partition (7) comprises: the upper partition strips (701) are arranged on the inner sides of the movable partition plates (7), and the upper partition strips (701) on the two movable partition plates (7) are respectively provided with a groove structure and a convex strip structure; the side guide wheel (702), the side guide wheel (702) wheel carrier is fixedly connected with the front side and the rear side of the movable partition plate (7); the driven rack (703) is fixedly connected to the front side and the rear side of the lower surface of the movable partition plate (7) through welding.

7. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 1, wherein the apparatus comprises: the lifting heating pipe (8) comprises: the pipe end connecting plates (801) are provided with two positions, and the two pipe end connecting plates (801) are respectively and fixedly connected to the two ends of the lifting heating pipe (8).

8. The apparatus according to claim 7, wherein the acrylic sheet is prevented from generating bubbles due to too long baking time, and the apparatus further comprises: the pipe end connecting plate (801) comprises: the pushing block (8011), the pushing block (8011) is fixedly connected on the outer surface of the pipe end connecting plate (801); the side driving rack (8012) is fixedly connected with the left side and the right side of the pipe end connecting plate (801) through welding.

9. The apparatus for preventing bubbles in acrylic sheets as claimed in claim 1, wherein the apparatus comprises: the cooling fan (9) comprises: fan travel switch (901), fan travel switch (901) pass through electric connection line connection cooling blower (9), and fan travel switch (901) is normally open contact, fan travel switch (901) fixed connection on the cavity hypoplastron outward edge of circulation frame (6).