Cavity inner membrane forming device

Abstract

The present application relates to a cavity inner membrane forming device, and relates to the technical field of glass fiber reinforced plastic cavity inner membrane forming, comprising a connecting pipe, wherein the two ends of the connecting pipe are respectively connected with an end connection block and an end tail connection block, an inflatable tube is connected between the end connection block and the end tail connection block, and the connection between the end connection block and the inflatable tube is sleeved with a clamp, the outer side of the inflatable tube is sleeved with a mold body, and a molding material is sleeved between the inflatable tube and the mold body; the present invention can quickly replace the subsequent workpiece when it is damaged, and avoid the molding material from being unable to be completely formed through multiple groups of sealing settings, and utilize the principle of controllable expansion of the inflatable tube in the cavity to achieve inner membrane shaping, so that the matrix resin and the reinforcing fiber material are tightly squeezed on the surrounding mold surfaces as a whole, and at the same time, the bubbles and glue content on the surface of the glass fiber reinforced plastic product are effectively reduced, and the product strength and service life are enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of glass fiber reinforced plastic cavity inner membrane molding, and in particular to a cavity inner membrane molding device. Background Art

[0002] Glass fiber reinforced plastic (FRP), also known as GFRP, is fiber reinforced plastic. It generally refers to reinforced plastics with unsaturated polyester, epoxy resin and phenolic resin matrix reinforced with glass fiber, and glass fiber or its products as reinforcing materials. It is called glass fiber reinforced plastic, or FRP, which is different from tempered glass.

[0003] Traditional cylindrical hollow fiberglass products are usually made by dividing the product into two parts and then combining them into one after completion, or wrapping the product diameter around a hard inner film and removing the inner and outer molds after solidification. The method of dividing the product into two parts affects the appearance and strength of the product, increases the production cycle, reduces the service life of the product, and makes the hard inner film for the design background only usable on neat and smooth inner walls, with a small scope of application.

[0004] Therefore, a cavity inner membrane molding device is proposed to solve the above-mentioned related technical problems. Summary of the invention

[0005] In order to improve the above problems, the present application provides a cavity inner membrane molding device.

[0006] The present application provides a cavity inner membrane forming device, which adopts the following technical solution: A cavity inner membrane forming device comprises a connecting tube, wherein the two ends of the connecting tube are respectively connected with an end connection block and an end tail connection block, an inflatable tube is connected between the end connection block and the end tail connection block, and the connection between the end connection block and the inflatable tube is sleeved with a clamp, the outer side of the inflatable tube is sleeved with a mold body, and a molding material is sleeved between the inflatable tube and the mold body; Wherein, the end of the end connecting block away from the connecting pipe is connected with a quick plug-in, and the end of the quick plug-in away from the connecting pipe is connected with an air intake assembly, and the air intake assembly includes inlet and outlet valves and a pressure gauge, and the pressure gauge is connected to one side of the inlet and outlet valves; first, the end connecting block and the end tail connecting block are connected to the two ends of the connecting pipe, and the end connecting block is connected to the air intake assembly through the quick plug-in, and then the inflation tube is sleeved on the end connecting block, the end tail connecting block and the outer side of the connecting pipe, and the inflation tube is pressed tightly on the outer side of the end connecting block and the end tail connecting block through a clamp, and then the molding material is surrounded on the outer side of the inflation tube, and the molding material is glass fiber cloth containing glue, and the molding material and the spliced ​​molding device are inserted into the mold body, and when the inner film molding work is performed, the inlet and outlet valves of the air intake assembly are used to control the inlet and outlet of the molding device, and the pressure gauge is used to monitor the air pressure during molding in real time during inflation and deflation.

[0007] Preferably, multiple groups of anti-slip grooves are provided on the outer sides of the end connection block and the end tail connection block, and pipeline slots are provided inside the end connection block and the end tail connection block.

[0008] By adopting the above technical solution, the two ends of the inflatable tube are pressed into the anti-slip groove, and the inflatable tube is pressed against the anti-slip groove by the clamp, and the anti-slip groove can be used to prevent gas leakage from the connection between the inflatable tube and the end connecting block and the end tail connecting block, and the anti-slip groove can also make the inflatable tube and the end connecting block and the end tail connecting block more tightly connected, thereby preventing the inflatable tube from falling off the end connecting block and the end tail connecting block.

[0009] Preferably, the two ends of the connecting pipe are respectively inserted into the pipe slots of the end connecting block and the end tail connecting block, a plurality of groups of air outlet holes are arranged in an array on the outer side of the connecting pipe, and sealing gaskets are provided at both ends of the connecting pipe.

[0010] By adopting the above technical solution, the connecting pipe is inserted into the pipe slots of the end connecting block and the end tail connecting block, thereby completing the connection between the connecting pipe and the end connecting block and the end tail connecting block, and the connecting pipe completes the work of exhausting and venting through the air outlet.

[0011] Preferably, both ends of the inlet and outlet valves are connected with inlet and outlet pipes, one end of the inlet and outlet pipes close to the end connection block is connected with a quick plug through a thread, and the quick plug is connected with the quick plug by plugging.

[0012] By adopting the above technical solution, the inlet and outlet valves are respectively connected to the external air pump and the end connection block through the inlet and outlet pipes at both ends thereof, and the inlet and outlet pipes are fixedly connected to the quick plug by threads, and can be plugged into the quick plug on the end connection block through the quick plug, so that the air intake assembly can be quickly connected and disassembled from the end connection block, which is convenient for rapid replacement of subsequent workpieces when they are damaged.

[0013] Preferably, a pipe joint is provided in the quick plug, and one end of the air inlet and outlet pipes is engaged with the pipe joint, and a fixed plug block and a fixed plug pipe are sequentially provided at one end of the quick plug close to the terminal connection block.

[0014] By adopting the above technical solution, when the air inlet and outlet pipes are completely connected to the quick plug, the air inlet and outlet pipes are plug-connected with the pipeline plug connector, and the gas in the air inlet and outlet pipes is sent to the quick plug through the pipeline plug connector.

[0015] Preferably, an air inlet and outlet plug is provided at one end of the quick-plug close to the connecting pipe, one end of the air inlet and outlet plug is inserted into the sealing gasket of the connecting pipe, and the fixed plug is inserted into the air inlet and outlet plug.

[0016] By adopting the above technical solution, when the quick plug is inserted into the quick plug-in unit, the fixed plug-in unit is inserted into the air inlet and outlet plugs, and the gas in the quick plug is sent into the air inlet and outlet plugs through the fixed plug-in unit, and the quick plug-in unit is inserted into the sealing gasket of the connecting pipe through the air inlet and outlet plugs, and the sealing gasket is used to prevent gas from escaping from the connection between the air inlet and outlet plugs and the connecting pipe, and the gas in the air inlet and outlet plugs is passed into the connecting pipe.

[0017] Preferably, a switch push block is arranged in the end of the quick plug away from the air inlet and outlet plugs, and a pressing head is arranged at the end of the switch push block close to the quick plug, and a spring sheet pressing block is arranged at the end of the switch push block away from the pressing head.

[0018] By adopting the above technical solution, when the quick plug is connected to the quick plug, the switch push block and the spring sheet pressing block connected thereto are first driven to move by pressing the pressing head.

[0019] Preferably, a spring ring is provided in the quick plug-in unit, a reset spring is provided between the switch push block and the spring ring, a plurality of groups of spring sheets are arranged in a circular array on the inner side of the spring ring, and the fixed plug-in unit is inserted between the plurality of groups of spring sheets of the spring ring.

[0020] By adopting the above technical solution, the spring sheet pressing block squeezes the spring sheet on the spring ring, so that the spring sheet is deformed, and when the multiple groups of spring sheets are deformed, one end of the multiple groups of spring sheets close to the center of the circle is bent toward the connecting pipe direction, and when bending, the opening formed by the multiple groups of spring sheets becomes larger, and the quick plug can be inserted into the quick plug-in unit at this time, and when the quick plug is fully inserted into the quick plug-in unit, the multiple groups of spring sheets in the spring ring clamp and fix the fixed plug block, thereby preventing the quick plug from being withdrawn from the quick plug-in unit, and after the connection work is completed, the switch push block is reset by the reset spring, and can be unlocked by pressing the pressing head when disassembling.

[0021] 1. Compared with the prior art, the cavity inner membrane forming device can quickly complete the connection of the air intake component, which is convenient for rapid replacement when the subsequent workpiece is damaged. It can be connected to the quick plug-in unit on the end connection block through the quick plug-in unit, and when the quick plug-in unit is connected to the quick plug-in unit, the switch push block and the spring sheet pressing block connected thereto are first driven to move by pressing the pressing head, and the spring sheet pressing block squeezes the spring sheet on the spring ring, so that the spring sheet is deformed, and when the multiple groups of spring sheets are deformed, the ends of the multiple groups of spring sheets close to the center of the circle are bent toward the connecting pipe direction, and when bending, the opening formed by the multiple groups of spring sheets becomes larger, and the quick plug can be inserted into the quick plug-in unit at this time, and when the quick plug is fully inserted into the quick plug-in unit, the multiple groups of spring sheets in the spring ring clamp and fix the fixed plug-in unit, thereby preventing the quick plug from being withdrawn from the quick plug-in unit, and after completing the connection work, the switch push block is reset by the reset spring, so that the air intake component can be quickly connected and disassembled with the end connection block.

[0022] 2. Compared with the prior art, the cavity inner membrane forming device prevents gas from escaping at the interfaces of various connection parts through multiple sets of sealing settings, thereby preventing the forming raw materials from being unable to be completely formed. The two ends of the inflatable tube are pressed into the anti-slip groove, and the inflatable tube is pressed against the anti-slip groove by a clamp. The anti-slip groove can prevent gas leakage at the connection between the inflatable tube and the end connection block and the end tail connection block, and the anti-slip groove can also make the inflatable tube and the end connection block and the end tail connection block more tightly connected, thereby preventing the inflatable tube from falling off the end connection block and the end tail connection block, and the quick plug is plugged into the sealing gasket of the connecting pipe through the inlet and outlet gas plug, and the sealing gasket is used to prevent gas from escaping at the connection between the inlet and outlet gas plug and the connecting pipe.

[0023] 3. Compared with the prior art, the cavity inner membrane forming device utilizes the principle that the expansion of the inflation tube in the cavity can be controlled to achieve the inner membrane shaping, so that the matrix resin and the reinforcing fiber material are tightly squeezed on the surrounding mold surfaces as a whole, and at the same time, the bubbles and the glue content on the surface of the FRP product are effectively reduced, and the strength and service life of the product are enhanced. The inlet and outlet valves of the air intake assembly are used to control the inlet and outlet air of the forming device, and the air pressure during the molding process is monitored in real time by the pressure gauge during the inflation and deflation process. The gas in the inlet and outlet pipes is sent into the quick plug through the pipeline plug joint, and the gas in the quick plug is sent into the inlet and outlet plugs through the fixed plug, and the gas in the inlet and outlet plugs is passed into the connecting pipe, and the gas in the connecting pipe is discharged outward through the outlet hole, and the inflation tube is expanded by the gas, and the inflation tube drives the molding raw material to stick to the inner wall of the mold body during the expansion process, and after a certain period of time for the raw material to be shaped and solidified, the compressed air is discharged through the inlet and outlet valves, the inflation inner membrane forming device is taken out, and then the mold body is separated to take out the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the main body of this application; Figure 2 A schematic diagram of the structure of the working method of the subject of this application; Figure 3 This is a schematic diagram of the structure at one end of the connecting pipe of the present application; Figure 4 This is a schematic diagram of the structure of the air intake assembly of the present application; Figure 5 This is a schematic diagram of the structure of the quick plug of this application; Figure 6 This is a schematic diagram of the structure of the side section of the quick plug-in unit of the present application; Figure 7 This is a schematic diagram of the structure of the terminal connection block of the present application; Figure 8 This is a schematic diagram of the structure of the switch push block of the present application; Fig. 9 This is a schematic diagram of the structure of the spring ring of the present application.

[0025] The accompanying drawings are marked as follows: 1. connecting pipe; 11. air outlet; 12. sealing gasket; 2. end connection block; 21. anti-slip groove; 22. quick plug; 221. inlet and outlet plugs; 222. switch push block; 2221. pressing head; 2222. spring sheet pressure block; 223. reset spring; 224. spring ring; 225. spring sheet; 23. pipeline slot; 3. air intake assembly; 31. inlet and outlet valves; 32. pressure gauge; 33. inlet and outlet pipes; 34. quick plug; 341. pipeline plug joint; 342. fixed plug; 343. fixed plug; 4. end connection block; 41. clamp; 5. inflation tube; 6. molding material; 7. mold body. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The following is combined with Figure 1-Figure 9 , further details of this application are given.

[0028] A cavity inner membrane forming device, comprising a connecting tube 1, referring to Figure 1 and Figure 2 as well as Figure 4The two ends of the connecting tube 1 are respectively connected with the end connection block 2 and the end tail connection block 4, the end connection block 2 and the end tail connection block 4 are connected with the gas expansion tube 5, and the connection between the end connection block 2 and the end tail connection block 4 and the gas expansion tube 5 is sleeved with a clamp 41, the outer side of the gas expansion tube 5 is sleeved with a mold body 7, and the molding material 6 is sleeved between the gas expansion tube 5 and the mold body 7; Among them, the end of the end connection block 2 away from the connecting pipe 1 is connected to the quick plug 22, and the end of the quick plug 22 away from the connecting pipe 1 is connected to the air intake assembly 3, and the air intake assembly 3 includes an inlet and outlet valve 31 and a pressure gauge 32, and the pressure gauge 32 is connected to one side of the inlet and outlet valve 31; first, the end connection block 2 and the end tail connection block 4 are connected to the two ends of the connecting pipe 1, and the end connection block 2 is connected to the air intake assembly 3 through the quick plug 22, and then the inflation tube 5 is sleeved on the end connection block 2 and the end tail connection block 4 and the connecting pipe. The outside of the pipe 1 is connected, and the inflation tube 5 is pressed against the outside of the end connection block 2 and the end tail connection block 4 by the clamp 41, and then the molding material 6 is wrapped around the outside of the inflation tube 5, and the molding material 6 is a glass fiber cloth containing glue, and the molding material 6 and the assembled molding device are inserted into the mold body 7. When the inner film molding work is performed, the inlet and outlet valves 31 of the air intake assembly 3 are used to control the inlet and outlet of the molding device, and the air pressure during the molding process is monitored in real time by the pressure gauge 32 during the inflation and deflation process.

[0029] Reference Figure 1 and Figure 7 , multiple groups of anti-slip grooves 21 are provided on the outer sides of the end connection block 2 and the end tail connection block 4, and pipeline slots 23 are provided in the end connection block 2 and the end tail connection block 4; both ends of the inflatable tube 5 are pressed in the anti-slip grooves 21, and the inflatable tube 5 is pressed against the anti-slip grooves 21 by the clamp 41, and the anti-slip grooves 21 can be used to prevent gas leakage at the connection between the inflatable tube 5 and the end connection block 2 and the end tail connection block 4, and the anti-slip grooves 21 can also make the inflatable tube 5 and the end connection block 2 and the end tail connection block 4 more tightly connected, thereby preventing the inflatable tube 5 from falling off the end connection block 2 and the end tail connection block 4.

[0030] Reference Figure 2 and Figure 3 The two ends of the connecting pipe 1 are respectively inserted into the pipe slots 23 of the end connection block 2 and the end tail connection block 4, and a plurality of groups of air outlet holes 11 are arranged in an array on the outer side of the connecting pipe 1, and sealing gaskets 12 are provided at both ends of the connecting pipe 1; the connecting pipe 1 is inserted into the pipe slots 23 of the end connection block 2 and the end tail connection block 4, thereby completing the connection between the connecting pipe 1 and the end connection block 2 and the end tail connection block 4, and the connecting pipe 1 completes the work of exhausting and venting through the air outlet holes 11.

[0031] Reference Figure 4 and Figure 5Both ends of the inlet and outlet valves 31 are plugged with inlet and outlet pipes 33, and one end of the inlet and outlet pipes 33 close to the end connection block 2 is connected with a quick plug 34 through a thread, and the quick plug 34 is plugged and connected with the quick plug 22; the inlet and outlet valves 31 are connected to the external air pump and the end connection block 2 through the inlet and outlet pipes 33 at both ends, and the inlet and outlet pipes 33 are fixedly connected with the quick plug 34 through threads, and can be plugged and connected with the quick plug 22 on the end connection block 2 through the quick plug 34, so that the air intake assembly 3 can be quickly connected and disassembled with the end connection block 2, which is convenient for rapid replacement of subsequent workpieces when they are damaged.

[0032] Reference Figure 5 and Figure 6 A pipe plug connector 341 is provided in the quick plug 34, and one end of the inlet and outlet pipes 33 is engaged with the pipe plug connector 341, and one end of the quick plug 34 close to the end connection block 2 is provided with a fixed plug block 342 and a fixed plug connector 343 in sequence; when the inlet and outlet pipes 33 are fully connected to the quick plug 34, the inlet and outlet pipes 33 are plugged and connected with the pipe plug connector 341, and the gas in the inlet and outlet pipes 33 is delivered to the quick plug 34 through the pipe plug connector 341.

[0033] Reference Figure 1 and Figure 6 , an end of the quick plug 22 close to the connecting pipe 1 is provided with an inlet and outlet plug 221, one end of the inlet and outlet plug 221 is inserted into the sealing gasket 12 of the connecting pipe 1, and the fixed plug 343 is inserted into the inlet and outlet plug 221; when the quick plug 34 is inserted into the quick plug 22, the fixed plug 343 is inserted into the inlet and outlet plug 221, and the gas in the quick plug 34 is sent into the inlet and outlet plug 221 through the fixed plug 343, and the quick plug 22 is inserted into the sealing gasket 12 of the connecting pipe 1 through the inlet and outlet plug 221, and the sealing gasket 12 is used to prevent gas from escaping from the connection between the inlet and outlet plug 221 and the connecting pipe 1, and the gas in the inlet and outlet plug 221 is passed into the connecting pipe 1.

[0034] Reference Figure 6 and Figure 8 A switch push block 222 is provided in the end of the quick plug 22 away from the air inlet and outlet plug 221, and a pressing head 2221 is provided at the end of the switch push block 222 close to the quick plug 34, and a spring sheet pressing block 2222 is provided at the end of the switch push block 222 away from the pressing head 2221; when the quick plug 22 is connected to the quick plug 34, the pressing head 2221 is pressed first to drive the switch push block 222 and the spring sheet pressing block 2222 connected thereto to move.

[0035] Reference Figure 6 and Fig. 9A spring ring 224 is arranged in the quick plug 22, a return spring 223 is arranged between the switch push block 222 and the spring ring 224, a plurality of groups of spring pieces 225 are arranged in a circular array on the inner side of the spring ring 224, and the fixed plug block 342 is inserted between the plurality of groups of spring pieces 225 of the spring ring 224; the spring piece pressing block 2222 squeezes the spring piece 225 on the spring ring 224, so that the spring piece 225 is deformed, and when the plurality of groups of spring pieces 225 are deformed, one end of the plurality of groups of spring pieces 225 close to the center of the circle is sent toward the direction of the connecting pipe 1. The spring ring 224 is bent, and when bent, the opening formed by the multiple groups of spring pieces 225 becomes larger, and the quick plug 34 can be inserted into the quick plug 22 at this time, and when the quick plug 34 is fully inserted into the quick plug 22, the multiple groups of spring pieces 225 in the spring ring 224 clamp and fix the fixed plug block 342, thereby preventing the quick plug 34 from being withdrawn from the quick plug 22, and after the connection work is completed, the switch push block 222 is reset by the reset spring 223, and can be unlocked by pressing the pressing head 2221 when disassembling.

[0036] The working process of the present application is as follows: first, the end connection block 2 and the end tail connection block 4 are connected to the two ends of the connection pipe 1, and the connection pipe 1 is plugged into the pipe slots 23 of the end connection block 2 and the end tail connection block 4, so as to complete the connection between the connection pipe 1 and the end connection block 2 and the end tail connection block 4, and the end connection block 2 is connected to the air intake assembly 3 through the quick plug 22, and the inlet and outlet valves 31 can be connected to the external air pump and the end connection block 2 through the inlet and outlet pipes 33 at both ends thereof, and the inlet and outlet pipes 33 are fixedly connected to the quick plug 34 by threads, and when the inlet and outlet pipes 33 are completely connected to the quick plug 34, the inlet and outlet pipes 33 are plugged and connected to the pipeline plug joint 341; The quick plug 34 can be connected to the quick plug 22 on the end connection block 2. When the quick plug 22 is connected to the quick plug 34, the switch push block 222 and the spring sheet pressing block 2222 connected thereto are firstly driven to move by pressing the pressing head 2221, and the spring sheet pressing block 2222 squeezes the spring sheet 225 on the spring ring 224, so that the spring sheet 225 is deformed. When the multiple groups of spring sheets 225 are deformed, one end of the multiple groups of spring sheets 225 close to the center of the circle is bent toward the connecting tube 1, and when bending, the multiple groups of spring sheets 225 are deformed. The opening formed by the plates 225 becomes larger, and the quick plug 34 can be inserted into the quick plug 22 at this time. When the quick plug 34 is fully inserted into the quick plug 22, the multiple groups of spring plates 225 in the spring ring 224 clamp and fix the fixed plug block 342, thereby preventing the quick plug 34 from being withdrawn from the quick plug 22. After the connection work is completed, the switch push block 222 is reset by the reset spring 223, so that the air intake assembly 3 can be quickly connected and disassembled with the end connection block 2, which is convenient for rapid replacement of subsequent workpieces when they are damaged. When the quick plug 34 is inserted into the quick plug 22, the fixed plug 343 is inserted into the inlet and outlet plug 221, and the quick plug 22 is inserted into the sealing gasket 12 of the connecting pipe 1 through the inlet and outlet plug 221, and the sealing gasket 12 is used to prevent gas from escaping from the connection between the inlet and outlet plug 221 and the connecting pipe 1, and then the inflation tube 5 is sleeved on the outer side of the end connection block 2 and the end tail connection block 4 and the connecting pipe 1, and the inflation tube 5 is pressed against the outer side of the end connection block 2 and the end tail connection block 4 through the hoop 41, and then the molding material 6 is wrapped around the outer side of the inflation tube 5, and the molding material 6 and the assembled molding device are inserted into the mold body 7; The inlet and outlet valves 31 of the air intake assembly 3 control the air inlet and outlet of the molding device, and the pressure during the molding process is monitored in real time by the barometer 32 during the inflation and deflation process. The gas in the inlet and outlet pipes 33 is sent to the quick plug 34 through the pipe plug joint 341, and the gas in the quick plug 34 is sent to the inlet and outlet plug 221 through the fixed plug 343. The gas in the inlet and outlet plug 221 is passed into the connecting pipe 1, and the gas in the connecting pipe 1 is discharged outward through the air outlet hole 11, and the gas is used to expand the inflation tube 5. In the process of expanding, the inflation tube 5 drives the molding material 6 to stick to the inner wall of the mold body 7, and after a certain period of time for the material to be shaped and solidified, the compressed air is discharged through the inlet and outlet valves 31, the inflation inner membrane molding device is taken out, and then the mold body 7 is separated to take out the product.

[0037] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cavity inner membrane forming device, comprising a connecting tube (1), characterized in that: The two ends of the connecting tube (1) are respectively connected to an end connection block (2) and an end tail connection block (4); an inflation tube (5) is connected between the end connection block (2) and the end tail connection block (4); and a clamp (41) is sleeved at the connection between the end connection block (2) and the end tail connection block (4) and the inflation tube (5); a mold body (7) is sleeved on the outer side of the inflation tube (5); and a molding material (6) is sleeved between the inflation tube (5) and the mold body (7); The end of the end connection block (2) away from the connection pipe (1) is connected to a quick-connect plug (22), and the end of the quick-connect plug (22) away from the connection pipe (1) is connected to an air intake assembly (3), and the air intake assembly (3) comprises an air inlet and outlet valve (31) and a pressure gauge (32), and the pressure gauge (32) is connected to one side of the air inlet and outlet valve (31).

2. The cavity inner membrane forming device according to claim 1, characterized in that: The outer sides of the end connection block (2) and the end tail connection block (4) are both provided with a plurality of groups of anti-slip grooves (21), and the end connection block (2) and the end tail connection block (4) are both provided with pipeline slots (23).

3. The cavity inner membrane forming device according to claim 2, characterized in that: The two ends of the connecting pipe (1) are respectively inserted into the pipe slots (23) of the end connection block (2) and the end connection block (4); a plurality of groups of air outlet holes (11) are arranged in an array on the outer side of the connecting pipe (1); and sealing gaskets (12) are provided inside both ends of the connecting pipe (1).

4. The cavity inner membrane forming device according to claim 1, characterized in that: Both ends of the air inlet and outlet valve (31) are plugged with air inlet and outlet pipes (33), one end of the air inlet and outlet pipe (33) close to the end connection block (2) is threadedly connected to a quick plug (34), and the quick plug (34) is plugged and connected to the quick plug (22).

5. The cavity inner membrane forming device according to claim 4, characterized in that: A pipe plug connector (341) is disposed in the quick plug (34), and one end of the air inlet and outlet pipes (33) is engaged with the pipe plug connector (341). A fixed plug block (342) and a fixed plug pipe (343) are sequentially disposed at one end of the quick plug (34) close to the end connection block (2).

6. The cavity inner membrane forming device according to claim 5, characterized in that: An air inlet and outlet plug (221) is provided at one end of the quick plug (22) close to the connecting pipe (1), one end of the air inlet and outlet plug (221) is plugged into the sealing gasket (12) of the connecting pipe (1), and the fixed plug (343) is plugged into the air inlet and outlet plug (221).

7. The cavity inner membrane forming device according to claim 6, characterized in that: A switch push block (222) is provided in one end of the quick plug (22) away from the air inlet and outlet plugs (221), a pressing head (2221) is provided at one end of the switch push block (222) close to the quick plug (34), and a spring sheet pressing block (2222) is provided at one end of the switch push block (222) away from the pressing head (2221).

8. The cavity inner membrane forming device according to claim 7, characterized in that: A spring ring (224) is arranged in the quick plug-in unit (22), a return spring (223) is arranged between the switch push block (222) and the spring ring (224), a plurality of groups of spring sheets (225) are arranged in a circular array on the inner side of the spring ring (224), and the fixed plug-in unit (342) is inserted between the plurality of groups of spring sheets (225) of the spring ring (224).

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