Plastic blown film device

Abstract

The invention belongs to the technical field of film blow molding, and discloses a plastic blow molding film device which comprises a film head seat, an input cavity formed in the film head seat and an input pipe fixed to the outer side of the film head seat, the input pipe conveys molten materials into the input cavity and extrudes the molten materials upwards, and an air blowing assembly is rotationally installed in the middle of the film head seat. By adapting to the size change of the bubble film, on the other hand, by utilizing the negative pressure suction effect, sucking gas of the adjusting type bubble stabilizing assembly, controlling the rigid rope to pull the elastic ring and utilizing the contraction effect of the middle area of the inner side face of the elastic sleeve, the middle area of the elastic sleeve is sunken, and the shape structure of the outer side face of the elastic sleeve is changed; a surrounding arc-shaped recess is formed and is matched with the arc surface of the outer side surface of the bubble film, so that the contact area is increased, the limiting area of the outer side of the bubble film is increased, the poor bubble stabilizing and supporting effect of point-line contact is avoided, the bubble stabilizing effect is improved, the stability of the size and the structural form of the bubble film is maintained, and the final film forming quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of film blowing, in particular to a plastic film blowing device. Background Art

[0002] The plastic blown film device is a device used to produce plastic film, which mainly includes an extruder, a film blowing head and a winding mechanism. After the liquid plastic is sprayed out, the wind blown out by the machine is used to blow the plastic body onto a bubble film of a certain shape to make a product.

[0003] During use, the plastic blown film device in the prior art usually needs to adjust the size of the bubble film by changing the air pressure according to different film production standards, so as to prepare plastic films of different specifications. However, for the current bubble stabilizing structure, the position is usually limited and supported on the outside of the bubble film to maintain the stability of the bubble film. However, the contact area is limited during the actual bubble stabilization process, the morphological support effect of the bubble film is general, and it is usually difficult to effectively adapt to the size change of the adjusted bubble film. The actual bubble stabilizing ability is weak. When dealing with bubble films with size changes, it is even more difficult to achieve effective adaptive limitation, and the overall bubble stabilizing effect is not good. Summary of the invention

[0004] The object of the present invention is to provide a plastic film blowing device to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a plastic blow molding film device, comprising a film head seat, an input cavity provided in the film head seat and an input pipe fixed on the outside of the film head seat, the input pipe conveys the molten material into the input cavity and extrude it upward, a blowing assembly is rotatably installed in the middle of the film head seat, an air supply assembly and a composite rotating part are respectively fixedly provided at the bottom of the blowing assembly, the air supply assembly blows air into the blowing assembly, and the composite rotating part drives the blowing assembly to rotate, a support ring is provided on the top of the film head seat, an adjustable foam stabilizing assembly is arranged around the interior of the support ring, an adjusting assembly is fixedly provided on the outside of the support ring, a connecting assembly is arranged between the adjusting assembly and the adjustable foam stabilizing assembly, the adjusting assembly controls the lateral movement of the adjustable foam stabilizing assembly, a negative pressure suction assembly is provided on the outside of the support ring, the negative pressure suction assembly sucks the gas in the adjustable foam stabilizing assembly through the connecting assembly, and controls the local contraction of the elastic sleeve in the adjustable foam stabilizing assembly.

[0006] Preferably, the adjustable bubble stabilizing assembly comprises a rotating disk, an intermediate tube, a sleeve, an elastic sleeve, an elastic ring, a rigid rope, a positioning ring, a spring and a piston plate. The rotating disk is symmetrically distributed on both sides of the intermediate tube. The interior of the rotating disk is hollow and connected to the intermediate tube. The sleeve is rotatably sleeved on the outer surface of the rotating disk. The elastic sleeve is fixedly connected between the sleeves on both sides. The elastic ring is fixed inside the elastic sleeve. The positioning ring is fixedly sleeved inside the rotating disk. The spring is located inside the rotating disk and one end is fixedly connected to the positioning ring. The other end of the spring is fixedly connected to the piston plate. The piston plate is movably sleeved inside the intermediate tube. One end of the rigid rope is fixedly connected to the piston plate, and the other end passes through the intermediate tube and is fixedly connected to the elastic ring.

[0007] Preferably, the blowing assembly includes a rotating cylinder, a blowing hole and an internal cavity, the internal cavity is opened at the bottom of the rotating cylinder, the blowing hole is opened on the outer surface of the rotating cylinder and is connected to the internal cavity, the rotating cylinder is rotatably sleeved in the membrane head seat through a clamping ring fixed on the outer side, and the blowing hole is located above the membrane head seat.

[0008] Preferably, the air supply assembly includes an air pump, a connecting hood and an air pipe, the air pump is fixed to the bottom of the membrane head seat, the connecting hood is rotatably sleeved on the bottom of the rotating cylinder, the air pipe is fixedly connected between the air pump and the connecting hood, the air pipe connects the connecting hood with the air pump, the inner wall of the connecting hood is provided with a sealing ring, and is sleeved on the outer side of the rotating cylinder.

[0009] Preferably, the composite rotating part includes a motor, gear one and gear two, the motor is fixed to the bottom of the membrane head seat through a frame, the output shaft of the motor is fixedly sleeved with gear two, the gear one is fixedly sleeved on the outer surface of the rotating cylinder and meshingly connected with gear two.

[0010] Preferably, the lifting assembly includes a hydraulic push rod, a support platform and a connecting rod, the hydraulic push rod is fixed to the side of the membrane head seat through a bottom bracket, the support platform is fixed to the movable end of the hydraulic push rod, the connecting rod is fixed to the side of the support platform and is fixedly connected to the negative pressure suction assembly.

[0011] Preferably, the connecting component includes a push tube, a piston ring, a connecting tube and a distribution frame, the connecting tube is fixedly connected to both sides of the distribution frame and connected to the distribution frame, the other end of the connecting tube is fixedly connected to the rotating disk and connected to the intermediate tube, the piston ring is fixed on the end face of the push tube, and the other end of the push tube is fixedly connected to the distribution frame, the push tube is connected to the distribution frame, and the push tube is movably connected to the support ring.

[0012] Preferably, the adjustment assembly includes a sleeve, an electric push rod and a support tube, the sleeve is fixedly connected to the outer surface of the support ring, the electric push rod is fixed to the end of the sleeve through a connecting frame, the movable end of the electric push rod passes through the end of the sleeve and extends to the interior of the sleeve, and is fixedly connected to the piston ring, the support tube is fixedly connected to the bottom of the sleeve and is connected to the interior of the sleeve, and the other end of the support tube is connected to the negative pressure suction assembly.

[0013] Preferably, the negative pressure suction assembly includes a vacuum pump, a distribution ring and a suction pipe, the vacuum pump is fixed on the top of the support table, the distribution ring is fixedly connected and communicated with the support pipe, the suction pipe is fixedly connected between the vacuum pump and the distribution ring, and the vacuum pump sucks the air in the distribution ring through the suction pipe.

[0014] Preferably, a ventilation mechanism is provided inside the membrane head seat, and the ventilation mechanism includes an assembly cavity, a middle hole and a distribution cavity. The distribution cavity is opened at the top of the membrane head seat, and an air outlet ring plate is fixedly sleeved inside the distribution cavity. An air outlet hole is opened on the front of the air outlet ring plate. The assembly cavity is opened at the bottom of the membrane head seat, and the middle hole is opened inside the membrane head seat. The upper and lower ends of the middle hole are respectively connected to the distribution cavity and the assembly cavity. An air outlet mechanism is provided inside the assembly cavity, and the air outlet mechanism includes a rotating shaft and blades fixed on the outside of the rotating shaft. The rotating shaft is fixedly connected to the output shaft of the motor.

[0015] The beneficial effects of the present invention are as follows: (1) The present invention utilizes an adjusting component, a connecting component and an adjustable bubble stabilizing component, and cooperates with a negative pressure suction component. On the one hand, it realizes the position movement of multiple groups of adjustable bubble stabilizing components to adapt to the size change of the bubble film. On the other hand, it utilizes the negative pressure suction effect to control the rigid rope to pull the elastic ring by sucking the gas of the adjustable bubble stabilizing component, and utilizes the contraction effect of the middle area of ​​the inner side surface of the elastic sleeve to realize the depression of the middle area of ​​the elastic sleeve, change the shape structure of the outer side surface of the elastic sleeve, form a surrounding arc-shaped depression, and adapt to the arc surface of the outer side surface of the bubble film, thereby increasing the contact area and increasing the restricted area of ​​the outer side of the bubble film, avoiding the poor bubble stabilizing support effect of point-line contact, thereby improving the bubble stabilizing effect, maintaining the stability of the bubble film size and structural morphology, and improving the final film forming quality.

[0016] (1) The present invention further utilizes the cooperation of the adjusting component and the connecting component to increase the surface restriction area of ​​the bubble film. At the same time, by changing the position of the adjustable bubble stabilizing component and the change of the outer arc state, the bubble films of different sizes can be adapted. The quality of the bubble stabilizing component can be improved while adapting to the changes of the bubble films of different sizes. The comprehensive use effect is good.

[0017] (2) The present invention utilizes the rotation of the composite rotating part to control the rotation of the blowing assembly during the blowing process, thereby realizing rotational blowing and improving the uniformity of blowing at different angles, thereby improving the quality of bubble film expansion molding. At the same time, the composite rotating part is used to drive the rotation of the air outlet mechanism, and the assembly cavity, the middle hole and the distribution cavity are connected to realize the rotation of the blowing assembly while simultaneously forming an axial flow wind, which is swept upward through the air outlet ring plate and wind-cooled along the outer side of the molded bubble film, thereby further improving the intensiveness of the blow molding device and achieving good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 It is a schematic diagram of the installation of the connecting component and the support ring of the present invention; Figure 4 is a schematic diagram of a negative pressure suction assembly of the present invention; Figure 5 It is a schematic diagram of the air blowing assembly, the air supply assembly and the composite rotating part of the present invention; Figure 6 It is a cross-sectional schematic diagram of the membrane head seat of the present invention; Figure 7 It is a cross-sectional schematic diagram of the regulating component and the connecting component of the present invention; Figure 8 It is a cross-sectional schematic diagram of the connecting component and the adjustable foam stabilizing component of the present invention; Fig. 9 It is a cross-sectional schematic diagram of the adjustable foam stabilizing component of the present invention.

[0019] In the figure: 1, membrane head seat; 2, input cavity; 3, blowing assembly; 31, rotating cylinder; 32, blowing hole; 33, internal cavity; 4, input pipe; 5, air supply assembly; 51, air pump; 52, connecting cover; 53, air pipe; 6, composite rotating part; 61, motor; 62, gear 1; 63, gear 2; 7, air outlet ring plate; 8, lifting assembly; 81, hydraulic push rod; 82, support platform; 83, connecting rod; 9, support ring; 10, connecting assembly; 101, push pipe; 102, piston ring; 103, connecting pipe; 104, Distribution frame; 11. Adjustable foam stabilizing assembly; 111. Rotating disk; 112. Intermediate tube; 113. Ring; 114. Elastic sleeve; 115. Elastic ring; 116. Rigid rope; 117. Positioning ring; 118. Spring; 119. Piston plate; 12. Adjustment assembly; 121. Sleeve; 122. Electric push rod; 123. Support tube; 13. Negative pressure suction assembly; 131. Vacuum pump; 132. Distribution ring; 133. Intake pipe; 14. Air outlet mechanism; 15. Assembly chamber; 16. Intermediate hole; 17. Distribution chamber. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 9 As shown, an embodiment of the present invention provides a plastic blow molding film device, including a film head seat 1, an input cavity 2 opened in the film head seat 1, and an input pipe 4 fixed on the outside of the film head seat 1, the input pipe 4 transports the molten material into the input cavity 2 and extrude it upward, a blowing component 3 is rotatably installed in the middle of the film head seat 1, and an air supply component 5 and a composite rotating part 6 are fixedly arranged at the bottom of the blowing component 3, the air supply component 5 blows air into the blowing component 3, and the composite rotating part 6 drives the blowing component 3 to rotate, and the top of the film head seat 1 is provided with A support ring 9 is provided with an adjustable foam stabilizing component 11 around its interior, an adjusting component 12 is fixedly provided on the outer side of the support ring 9, a connecting component 10 is provided between the adjusting component 12 and the adjustable foam stabilizing component 11, the adjusting component 12 controls the lateral movement of the adjustable foam stabilizing component 11, a negative pressure suction component 13 is provided on the outer side of the support ring 9, the negative pressure suction component 13 sucks the gas in the adjustable foam stabilizing component 11 through the connecting component 10, and controls the local contraction of the elastic sleeve 114 in the adjustable foam stabilizing component 11.

[0022] The adjustable bubble stabilizing assembly 11 includes a rotating disk 111, an intermediate tube 112, a sleeve 113, an elastic sleeve 114, an elastic ring 115, a rigid rope 116, a positioning ring 117, a spring 118 and a piston plate 119. The rotating disk 111 is symmetrically distributed on both sides of the intermediate tube 112. The rotating disk 111 is hollow inside and communicates with the intermediate tube 112. The sleeve 113 is rotatably sleeved on the outer surface of the rotating disk 111. The elastic sleeve 114 is fixedly connected between the sleeves 113 on both sides. The elastic ring 115 is fixed inside the elastic sleeve 114, the positioning ring 117 is fixedly sleeved inside the rotating disk 111, the spring 118 is located inside the rotating disk 111, and one end is fixedly connected to the positioning ring 117, the other end of the spring 118 is fixedly connected to the piston plate 119, the piston plate 119 is movably sleeved inside the middle tube 112, one end of the rigid rope 116 is fixedly connected to the piston plate 119, and the other end passes through the middle tube 112 and is fixedly connected to the elastic ring 115.

[0023] Embodiment 1: When in use, the external conveying mechanism inputs the molten material into the input pipe 4, passes it into the input cavity 2, and extrude it upwards, and at the same time, the air supply component 5 is started, and the air pump 51 inputs the pressurized air into the interior of the blowing component 3 through the connecting cover 52, and blows it out through the internal cavity 33 and the blowing hole 32. The blown air acts on the inside of the extruded film and blows it up, pulling the top of the extruded film and passing it upward through the adjustable bubble stabilizing component 11, and matching it with the corresponding external "herringbone" splint, and sleeved on the external receiving winding roller. With winding and continued extrusion, the film blowing is completed. When it is necessary to adjust the size of the expanded film, the adjusting component 12 is started first, and the electric push rod 122 drives the connecting component 10 to move horizontally, and drives the adjustable bubble stabilizing component 11 away from the bubble film, adjusts the blowing air pressure, and the film further expands, and the electric push rod 12 is started again 2, so that the connecting component 10 and the adjustable bubble stabilizing component 11 move and approach the bubble film, and at the same time start the negative pressure suction component 13, the vacuum pump 131 sucks the air in the sleeve 121 through the distribution ring 132 and the suction pipe 133, and sucks the air inside the middle tube 112 of the adjustable bubble stabilizing component 11 through the connecting component 10, and the piston plate 119 moves under the action of negative pressure, compressing the spring 118 and pulling the rigid rope 116 at the same time, and the rigid rope 116 pulls the elastic ring 115, driving the elastic sleeve 114 to sink near the middle area, so that the outer side of the elastic sleeve 114 presents an arc shape, as the adjustable bubble stabilizing component 11 moves close to the adjusted bubble film, the outer arc surface of the elastic sleeve 114 contacts the bubble film, and as the bubble film moves upward, the elastic sleeve 114 and the ring 113 in contact with the surface rotate synchronously, completing the adjusted full bubble stabilization.

[0024] Firstly, by utilizing the adjusting component 12, the connecting component 10 and the adjustable bubble stabilizing component 11, and cooperating with the negative pressure suction component 13, on the one hand, the position movement of multiple groups of adjustable bubble stabilizing components 11 is realized to adapt to the size change of the bubble film, and on the other hand, the negative pressure suction effect is utilized to control the rigid rope 116 to pull the elastic ring 115 by sucking the gas of the adjustable bubble stabilizing component 11, and the contraction effect of the middle area of ​​the inner side surface of the elastic sleeve 114 is utilized to realize the depression of the middle area of ​​the elastic sleeve 114, and change the shape structure of the outer side surface of the elastic sleeve 114 to form a surrounding arc-shaped depression, and adapt to the arc surface of the outer side surface of the bubble film, thereby increasing the contact area, increasing the restricted area on the outside of the bubble film, and avoiding the poor bubble stabilizing support effect of point-line contact, thereby improving the bubble stabilizing effect, maintaining the stability of the bubble film size and structural morphology, and improving the final film forming quality.

[0025] In addition, by reusing the cooperation of the adjustment component 12 and the connecting component 10, the surface restriction area of ​​the bubble film is increased, and at the same time, the adaptation of bubble films of different sizes is achieved by changing the position of the adjustable bubble stabilizing component 11 and the change of the outer arc state. The quality of the bubble stabilization can be improved while adapting to the changes of bubble films of different sizes, and the comprehensive use effect is good.

[0026] Embodiment 2: During the blow molding process, the composite rotating part 6 is started, and the motor 61 drives the blowing assembly 3 to rotate through gear 1 62 and gear 2 63. The blowing hole 32 rotates to blow air evenly, and the bubble film is formed stably. As the motor 61 rotates, the air outlet mechanism 14 is synchronously driven to rotate, so that the blades rotate and air is sucked in from the bottom to form axial flow wind. The axial flow wind is input into the distribution chamber 17 through the assembly chamber 15 and the middle hole 16, and is blown out upward through the air outlet ring plate 7 to complete uniform blowing and bubble film cooling.

[0027] Firstly, by utilizing the rotation effect of the composite rotating part 6, the rotation of the blowing component 3 is controlled during the blowing process to realize rotational blowing, thereby improving the uniformity of blowing at different angles, thereby improving the quality of bubble film expansion molding. At the same time, the composite rotating part 6 is used to drive the rotation of the air outlet mechanism 14, and the assembly cavity 15, the middle hole 16 and the distribution cavity 17 are connected to realize that while the blowing component 3 rotates, axial flow wind is synchronously formed, and is blown upward through the air outlet ring plate 7, and wind cooling is performed along the outer side of the molded bubble film, thereby further improving the intensiveness of the blow molding device and achieving good use effect.

[0028] Among them, the blowing assembly 3 includes a rotating cylinder 31, a blowing hole 32 and an internal cavity 33. The internal cavity 33 is opened at the bottom of the rotating cylinder 31. The blowing hole 32 is opened around the outer surface of the rotating cylinder 31 and is connected to the internal cavity 33. The rotating cylinder 31 is rotatably sleeved in the membrane head seat 1 through a clamping ring fixed on the outer side. The blowing hole 32 is located above the membrane head seat 1.

[0029] By utilizing the blowing action of the blowing assembly 3, the extruded tubular film is blown and cooperated to form a bubble film, thereby expanding the film size.

[0030] Among them, the air supply component 5 includes an air pump 51, a connecting cover 52 and an air pipe 53. The air pump 51 is fixed at the bottom of the membrane head seat 1, the connecting cover 52 is rotatably sleeved on the bottom of the rotating cylinder 31, and the air pipe 53 is fixedly connected between the air pump 51 and the connecting cover 52. The air pipe 53 connects the connecting cover 52 with the air pump 51. The inner wall of the connecting cover 52 is provided with a sealing ring, and is sleeved on the outer side of the rotating cylinder 31.

[0031] By utilizing the air supply assembly 5 to realize the input of pressurized air, the connecting cover 52 maintains a dynamic seal with the rotating cylinder 31 through an internal sealing ring to avoid leakage, thereby providing blowing air for the blowing assembly 3.

[0032] Among them, the composite rotating part 6 includes a motor 61, gear one 62 and gear two 63. The motor 61 is fixed to the bottom of the membrane head seat 1 through a frame. The output shaft of the motor 61 is fixedly sleeved with the gear two 63. The gear one 62 is fixedly sleeved on the outer surface of the rotating cylinder 31 and meshed with the gear two 63.

[0033] By utilizing the composite rotating part 6 to provide rotational power and cooperating with the meshing of the gear 1 62 and the gear 2 63 , the rotation of the rotating cylinder 31 is realized, thereby completing the rotational blowing of the blowing assembly 3 .

[0034] Among them, the lifting assembly 8 includes a hydraulic push rod 81, a support platform 82 and a connecting rod 83. The hydraulic push rod 81 is fixed to the side of the membrane head seat 1 through a bottom bracket, the support platform 82 is fixed to the movable end of the hydraulic push rod 81, and the connecting rod 83 is fixed to the side of the support platform 82 and fixedly connected to the negative pressure suction assembly 13.

[0035] The lifting component 8 controls the height position of the adjustable bubble stabilizing component 11 and adjusts the bubble stabilizing position according to the actual bubble film condition.

[0036] The connecting assembly 10 includes a push tube 101, a piston ring 102, a connecting tube 103 and a distribution frame 104. The connecting tube 103 is fixedly connected to both sides of the distribution frame 104 and is connected to the distribution frame 104. The other end of the connecting tube 103 is fixedly connected to the rotating disk 111 and is connected to the intermediate tube 112. The piston ring 102 is fixed on the end face of the push tube 101, and the other end of the push tube 101 is fixedly connected to the distribution frame 104. The push tube 101 is connected to the distribution frame 104, and the push tube 101 is movably connected to the support ring 9. The adjusting assembly 12 includes a sleeve 121, an electric push rod 122 and a support tube 123. The sleeve 121 is fixedly connected to the outer surface of the support ring 9, and the electric push rod 122 is fixed by a connecting frame. Fixed at the end of the sleeve 121, the movable end of the electric push rod 122 passes through the end of the sleeve 121 and extends to the interior of the sleeve 121, and is fixedly connected to the piston ring 102, the support tube 123 is fixedly connected to the bottom of the sleeve 121, and is communicated with the interior of the sleeve 121, the other end of the support tube 123 is communicated with the negative pressure suction assembly 13, the negative pressure suction assembly 13 includes a vacuum pump 131, a distribution ring 132 and an intake pipe 133, the vacuum pump 131 is fixed on the top of the support platform 82, the distribution ring 132 is fixedly connected and communicated with the support tube 123, the intake pipe 133 is fixedly connected between the vacuum pump 131 and the distribution ring 132, and the vacuum pump 131 sucks the air in the distribution ring 132 through the intake pipe 133.

[0037] The connecting component 10 is used to connect the adjusting component 12 and the adjustable bubble stabilizing component 11, cooperate with the suction effect of the negative pressure suction component 13, guide the gas sucked into the adjustable bubble stabilizing component 11, and realize negative pressure control. The piston ring 102 realizes dynamic sealing sliding in the sleeve 121, and the support tube 123 fixes the distribution ring 132 and realizes the supporting function. The adjusting component 12 laterally adjusts the position of the adjustable bubble stabilizing component 11 to adapt to the size changes of the bubble film.

[0038] Among them, a ventilation mechanism is provided inside the membrane head seat 1, and the ventilation mechanism includes an assembly cavity 15, a middle hole 16 and a distribution cavity 17. The distribution cavity 17 is opened at the top of the membrane head seat 1, and an air outlet ring plate 7 is fixedly sleeved inside the distribution cavity 17. An air outlet hole is opened on the front of the air outlet ring plate 7. The assembly cavity 15 is opened at the bottom of the membrane head seat 1, and the middle hole 16 is opened inside the membrane head seat 1. The upper and lower ends of the middle hole 16 are respectively connected with the distribution cavity 17 and the assembly cavity 15. An air outlet mechanism 14 is provided inside the assembly cavity 15. The air outlet mechanism 14 includes a rotating shaft and blades fixed on the outside of the rotating shaft. The rotating shaft is fixedly connected to the output shaft of the motor 61.

[0039] The ventilation mechanism realizes air conduction, cooperates with the rotating air outlet mechanism 14 to realize the outlet of axial flow wind, completes upward sweeping, and cools the outer side of the bubble film to improve the forming effect.

[0040] The working principle and use process of the present invention are as follows: when in use, the external conveying mechanism inputs the molten material into the input pipe 4, passes it into the input cavity 2, and extrude it upwards, and at the same time, the air supply component 5 is started, and the air pump 51 inputs the pressurized air into the interior of the blowing component 3 through the connecting cover 52, and blows it out through the internal cavity 33 and the blowing hole 32. The blown air acts on the inside of the extruded film and expands it, pulling the top of the extruded film and passing it upwards through the adjustable foam stabilizing component 11, and matching with the corresponding external "herringbone" splint, and sleeved on the external receiving roll. On the roller, with winding and continued extrusion, the film blowing is completed. When the size of the expanded film needs to be adjusted, the adjustment component 12 is started first, and the electric push rod 122 drives the connecting component 10 to move horizontally, and drives the adjustable bubble stabilizing component 11 away from the bubble film, adjusts the blowing air pressure, and the film further expands. The electric push rod 122 is started again, so that the connecting component 10 and the adjustable bubble stabilizing component 11 move and approach the bubble film. At the same time, the negative pressure suction component 13 is started, and the vacuum pump 131 sucks the air in the sleeve 121 through the distribution ring 132 and the suction pipe 133. The air inside the middle tube 112 of the adjustable bubble stabilizing component 11 is sucked through the connecting component 10, and the piston plate 119 moves under the action of negative pressure, compressing the spring 118 while pulling the rigid rope 116, and the rigid rope 116 pulls the elastic ring 115, driving the elastic sleeve 114 to sink near the middle area, so that the outer side of the elastic sleeve 114 presents an arc shape, and as the adjustable bubble stabilizing component 11 moves close to the adjusted bubble film, the outer arc surface of the elastic sleeve 114 contacts the bubble film, and as the bubble film moves upward, the elastic sleeve 114 and the surface contacting the bubble film are pressed together. The sleeve ring 113 rotates synchronously to complete the fully stable bubble after adjustment; during the blow molding process, the composite rotating part 6 is started, and the motor 61 drives the blowing component 3 to rotate through gear 1 62 and gear 2 63. The blowing hole 32 rotates to blow evenly, and the bubble film is formed stably. As the motor 61 rotates, the air outlet mechanism 14 is synchronously driven to rotate, so that the blades rotate and inhale air from the bottom to form axial flow wind. The axial flow wind is input into the distribution chamber 17 through the assembly cavity 15 and the middle hole 16, and is blown out upward through the air outlet ring plate 7 to complete uniform blowing and bubble film cooling.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic film blowing device, comprising a film head seat (1), an input cavity (2) provided in the film head seat (1), and an input pipe (4) fixed to the outside of the film head seat (1), wherein the input pipe (4) conveys molten material into the input cavity (2) and extrude the molten material upward, characterized in that: A blowing assembly (3) is rotatably mounted in the middle of the membrane head seat (1), and an air supply assembly (5) and a composite rotating part (6) are fixedly mounted at the bottom of the blowing assembly (3). The air supply assembly (5) blows air into the blowing assembly (3), and the composite rotating part (6) drives the blowing assembly (3) to rotate. A support ring (9) is provided on the top of the membrane head seat (1), and an adjustable foam stabilizing assembly (11) is arranged around the inside of the support ring (9). An adjustable foam stabilizing assembly (11) is fixedly mounted on the outside of the support ring (9). A regulating component (12) is provided between the regulating component (12) and the adjustable foam stabilizing component (11), the regulating component (12) controls the lateral movement of the adjustable foam stabilizing component (11), and a negative pressure suction component (13) is provided on the outer side of the support ring (9), the negative pressure suction component (13) sucks gas in the adjustable foam stabilizing component (11) through the connecting component (10) and controls the local contraction of the elastic sleeve (114) in the adjustable foam stabilizing component (11).

2. A plastic film blowing device according to claim 1, characterized in that: The adjustable foam stabilizing assembly (11) comprises a rotating disk (111), an intermediate tube (112), a sleeve (113), an elastic sleeve (114), an elastic ring (115), a rigid rope (116), a positioning ring (117), a spring (118) and a piston plate (119); the rotating disk (111) is symmetrically distributed on both sides of the intermediate tube (112); the rotating disk (111) is hollow inside and communicates with the intermediate tube (112); the sleeve (113) is rotatably sleeved on the outer surface of the rotating disk (111); and the elastic sleeve (114) is fixedly connected between the sleeves (113) on both sides. The elastic ring (115) is fixed inside the elastic sleeve (114), the positioning ring (117) is fixedly sleeved inside the rotating disk (111), the spring (118) is located inside the rotating disk (111), and one end of the spring (118) is fixedly connected to the positioning ring (117), the other end of the spring (118) is fixedly connected to the piston plate (119), and the piston plate (119) is movably sleeved inside the middle tube (112), one end of the rigid rope (116) is fixedly connected to the piston plate (119), and the other end passes through the middle tube (112) and is fixedly connected to the elastic ring (115).

3. A plastic film blowing device according to claim 2, characterized in that: The blowing assembly (3) comprises a rotating cylinder (31), a blowing hole (32) and an internal cavity (33); the internal cavity (33) is provided at the bottom of the rotating cylinder (31); the blowing hole (32) is provided around the outer surface of the rotating cylinder (31) and is communicated with the internal cavity (33); the rotating cylinder (31) is rotatably sleeved in the membrane head seat (1) via a clamping ring fixed on the outer side; the blowing hole (32) is located above the membrane head seat (1).

4. A plastic film blowing device according to claim 3, characterized in that: The air supply assembly (5) comprises an air pump (51), a connecting cover (52) and an air pipe (53); the air pump (51) is fixed to the bottom of the membrane head seat (1); the connecting cover (52) is rotatably sleeved on the bottom of the rotating cylinder (31); the air pipe (53) is fixedly connected between the air pump (51) and the connecting cover (52); the air pipe (53) enables the connecting cover (52) to communicate with the air pump (51); a sealing ring is provided on the inner wall of the connecting cover (52) and is sleeved on the outer side of the rotating cylinder (31).

5. A plastic film blowing device according to claim 4, characterized in that: The composite rotating part (6) comprises a motor (61), a gear one (62) and a gear two (63); the motor (61) is fixed to the bottom of the membrane head seat (1) via a frame; the output shaft of the motor (61) is fixedly sleeved with the gear two (63); the gear one (62) is fixedly sleeved on the outer surface of the rotating cylinder (31) and meshingly connected with the gear two (63).

6. A plastic film blowing device according to claim 5, characterized in that: The lifting assembly (8) comprises a hydraulic push rod (81), a support platform (82) and a connecting rod (83); the hydraulic push rod (81) is fixed to the side of the membrane head seat (1) via a bottom bracket; the support platform (82) is fixed to the movable end of the hydraulic push rod (81); the connecting rod (83) is fixed to the side of the support platform (82) and is fixedly connected to the negative pressure suction assembly (13).

7. A plastic film blowing device according to claim 6, characterized in that: The connecting assembly (10) comprises a push tube (101), a piston ring (102), a connecting tube (103) and a distribution frame (104); the connecting tube (103) is fixedly connected to both sides of the distribution frame (104) and is in communication with the distribution frame (104); the other end of the connecting tube (103) is fixedly connected to a rotating disk (111) and is in communication with an intermediate tube (112); the piston ring (102) is fixed to an end face of the push tube (101), and the other end of the push tube (101) is fixedly connected to the distribution frame (104); the push tube (101) is in communication with the distribution frame (104); and the push tube (101) is movably sleeved with a support ring (9).

8. A plastic film blowing device according to claim 7, characterized in that: The adjustment assembly (12) comprises a sleeve (121), an electric push rod (122) and a support tube (123); the sleeve (121) is fixedly connected to the outer surface of the support ring (9); the electric push rod (122) is fixed to the end of the sleeve (121) via a connecting frame; the movable end of the electric push rod (122) passes through the end of the sleeve (121) and extends to the interior of the sleeve (121) and is fixedly connected to the piston ring (102); the support tube (123) is fixedly connected to the bottom of the sleeve (121) and is in communication with the interior of the sleeve (121); the other end of the support tube (123) is in communication with the negative pressure suction assembly (13).

9. A plastic film blowing device according to claim 8, characterized in that: The negative pressure suction assembly (13) comprises a vacuum pump (131), a distribution ring (132) and an air suction pipe (133); the vacuum pump (131) is fixed on the top of the support platform (82); the distribution ring (132) is fixedly connected to and communicates with the support pipe (123); the air suction pipe (133) is fixedly connected between the vacuum pump (131) and the distribution ring (132); the vacuum pump (131) sucks air in the distribution ring (132) through the air suction pipe (133).

10. A plastic film blowing device according to claim 9, characterized in that: A ventilation mechanism is provided inside the membrane head seat (1), and the ventilation mechanism comprises an assembly chamber (15), a middle hole (16) and a distribution chamber (17); the distribution chamber (17) is provided at the top of the membrane head seat (1); an air outlet ring plate (7) is fixedly sleeved inside the distribution chamber (17); an air outlet hole is provided on the front side of the air outlet ring plate (7); the assembly chamber (15) is provided at the bottom of the membrane head seat (1); the middle hole (16) is provided inside the membrane head seat (1); the upper and lower ends of the middle hole (16) are respectively connected to the distribution chamber (17) and the assembly chamber (15); an air outlet mechanism (14) is provided inside the assembly chamber (15); the air outlet mechanism (14) comprises a rotating shaft and blades fixed to the outside of the rotating shaft; the rotating shaft is fixedly connected to the output shaft of the motor (61).

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