Plastic film blowing machine

Abstract

The present invention relates to the technical field of film blowing machines, and in particular to a plastic film blowing machine. The present invention comprises: a film blowing machine unit for mixing plastic particles and blowing film, characterized in that a traction mechanism is provided for traction of the plastic film after the film is blown; the traction mechanism comprises: a traction frame, a traction roller group rotatably mounted on the traction frame, a power component for driving the traction roller group to rotate, and an adjustment component for adjusting the traction roller angle; the traction roller group is composed of an active traction roller and a passive traction roller; a fan is used for ventilating the inside of the active traction roller; when the active traction roller of the present invention rotates, the active traction roller can be cooled by the fan on the one hand, and the plastic film can be blown on the other hand.

Description

Technical Field

[0001] The invention relates to the technical field of film blowing machines, and in particular to a plastic film blowing machine. Background Art

[0002] Plastic film blowing is a plastic processing method. The main processing flow of the film blowing machine is: equipment inspection, raw material preparation and temperature setting before starting the machine; preheating and temperature rise after starting the machine, equipment trial operation and parameter adjustment; then the extruder melts and extrude the plastic particles, and after filtering, it is formed into a cylindrical film tube from the die head, and then formed into a film bubble through blowing and cooling; then it is pulled by a herringbone plate and stretched by a pulling roller, and finally trimmed and rolled into a tube; the pulling roller will generate heat during the rotation process due to the friction between the plastic film and its own mechanical operation. If the heat cannot be dissipated in time, the excessive temperature of the pulling roller may cause the plastic film to deform.

[0003] The invention with publication number CN116160669B relates to a polyethylene film blowing machine, comprising a frame, a film blowing module is mounted on the frame, a die head is mounted on the upper end of the film blowing module, a traction module for pulling the film upward is arranged above the die head, a human-shaped plate connected to the frame for flattening a straight cylindrical polyethylene film is arranged above the traction module, a guide roller for guiding the movement of the film is mounted on the frame, a winding unit for winding the film is arranged on one side of the film blowing module, a cooling module is also arranged in the frame, the cooling module is arranged between the film blowing module and the winding unit, the cooling module comprises a cooling box, more than one heat dissipation roller is arranged in the cooling box through bearing rotation, the heat dissipation roller is a hollow structure, and the heat dissipation roller is connected to a water supply tank through a conduit to form a circulating water circuit; the above invention cools the polyethylene film by water cooling to avoid the polyethylene film from breaking.

[0004] However, the traction module of the patent will gradually heat up after long-term use, causing the temperature of the polyethylene film to rise.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0006] The object of the present invention is to provide a plastic film blowing machine which can effectively solve the above technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0008] A plastic film blowing machine, comprising: a film blowing unit for mixing plastic particles and blowing film, characterized in that a traction mechanism is provided for traction of the plastic film after the film is blown;

[0009] The traction mechanism comprises: a traction frame, a traction roller group rotatably mounted on the traction frame, a power component for driving the traction roller group to rotate, and an adjustment component for adjusting the angle of the traction roller;

[0010] The traction roller group is composed of an active traction roller and a passive traction roller;

[0011] A fan, used for ventilating the interior of the active traction roller;

[0012] The active traction roller comprises: a shell, connecting rods fixedly mounted at both ends of the shell, connecting plates rotatably mounted at both ends of the shell, cooling holes opened on the surface of the shell, and a sealing assembly for sealing the cooling holes;

[0013] The sealing assembly comprises: a sealing plate rotatably mounted on the cooling hole, a hinge rod connecting two adjacent sealing plates, an abutment block driving the sealing plate to swing, and a spring connecting the abutment block and the housing;

[0014] The traction frame is provided with an inclined block abutting against the abutting block.

[0015] Furthermore, a smearing piece is detachably mounted on the outer wall of the active traction roller, and a capsule is arranged inside the active traction roller, the capsule is adapted to the position of the smearing piece, and a liquid flow channel is provided between the capsule and the smearing piece; an air inlet is provided on the capsule, and the air inlet is connected to or staggered with the air outlet end of the fan during the rotation of the active traction roller;

[0016] When the air inlet is connected to the air outlet of the fan, the capsule expands and squeezes the liquid flow channel, squeezing the liquid into the smear member;

[0017] When the air inlet is staggered with the air outlet of the fan, the fan squeezes the capsule.

[0018] Furthermore, it also includes: a liquid storage box; the liquid storage box is composed of a storage chamber, a pressurizing chamber, and a slide plate slidably installed between the storage chamber and the pressurizing chamber;

[0019] The pressurizing chamber is in communication with the air outlet end of the bladder;

[0020] The liquid outlet end of the storage cavity is communicated with the liquid flow channel.

[0021] Furthermore, a rotating rod is rotatably installed in the storage cavity, and a threaded sleeve is coaxially spirally connected to the rotating rod, and the threaded sleeve is fixedly connected to the slide plate.

[0022] Furthermore, one-way valves are provided between the pressurizing chamber and the capsule, and between the storage chamber and the liquid flow channel.

[0023] Furthermore, the cooling hole and the smear member are arranged in sequence along the axial direction of the shell.

[0024] Furthermore, the power assembly includes: a motor, a first gear fixedly connected to the output end of the motor, a first synchronous belt transmission-connected to the first gear, a second gear transmission-connected to the first synchronous belt, the second gear rotatably mounted on the traction frame, and the second gear is coaxially connected to the active traction roller.

[0025] Furthermore, the adjustment assembly includes: a telescopic cylinder fixedly mounted on the traction frame, and an adjustment member connected to the output end of the telescopic cylinder; the adjustment member is rotatably mounted on the traction frame and is connected to an adjustment roller, and the adjustment roller is rotatably mounted on the traction frame.

[0026] Compared with the prior art, the present invention has the following beneficial effects: when the active traction roller of the present invention rotates, on the one hand, the active traction roller can be cooled by the fan, and on the other hand, air can be blown onto the plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0028] Figure 1 It is a schematic diagram of the axial side of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the present invention;

[0030] Figure 3 It is a structural schematic diagram of another angle of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the traction mechanism of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the inner side of the traction mechanism of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the power assembly of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the active traction roller of the present invention;

[0035] Figure 8 This is a schematic diagram of the internal structure of the active traction roller of the present invention;

[0036] Fig. 9 It is a structural schematic diagram of the liquid storage tank of the present invention;

[0037] Fig.10 is a cross-sectional view of the liquid storage tank of the present invention;

[0038] Fig.11It is a schematic structural diagram of the sealing assembly of the present invention.

[0039] In the figure: 1, support frame; 2, film blowing unit; 3, traction mechanism; 4, film collection mechanism; 31, traction frame; 32, traction roller group; 33, power assembly; 34, adjustment assembly; 321, active traction roller; 322, passive traction roller; 331, motor; 332, first gear; 333, first synchronous belt; 334, second gear; 335, third gear; 336, second synchronous belt; 337, fourth gear; 341, telescopic cylinder; 342, adjustment member; 35, installation box; 36, electric control cabinet; 3211, housing; 3212, connection Connecting rod; 3213, connecting plate; 3214, cooling hole; 3215, sealing assembly; 32131, connecting through hole; 32121, connecting ring; 32122, rod body; 32151, sealing plate; 32152, hinged rod; 32153, abutment block; 32154, spring; 323, inclined block; 3216, smear member; 3217, capsule; 3218, liquid storage tank; 32181, storage chamber; 32182, pressurizing chamber; 32183, slide plate; 32184, rotating rod; 32185, threaded sleeve; 11, escalator. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0041] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0042] like Figures 1 to 11As shown, a plastic film blowing machine of the present invention comprises: a support frame 1, a ladder 11 is arranged on one side of the support frame 1, a film blowing unit 2 fixedly mounted on the support frame 1, a traction mechanism 3 fixedly mounted on the unloading end of the film blowing unit 2, and a film collecting mechanism 4 fixedly mounted on the unloading end of the traction mechanism 3.

[0043] The traction mechanism 3 is used to traction the plastic film blown by the film blowing unit 2, and to traction the plastic film to the film collecting mechanism 4; the cooling mechanism is used to cool the traction mechanism 3, so that the traction mechanism 3 cools the plastic film during the traction process; the film collecting mechanism 4 is used to roll the traction plastic film into a tube.

[0044] The film blowing unit 2 comprises: a blow molding machine, a feed hopper is installed at the feed end of the blow molding machine, a solenoid valve is installed in the upper hopper, plastic particles are added to the upper hopper, and when necessary, the solenoid valve is opened to allow the plastic particles to enter the blow molding machine; during processing, the plastic particles are added to the hopper of the film blowing unit 2, the plastic particles are heated to a molten state by the heating system of the extruder, the molten plastic is extruded by the extruder, and the plastic film is blown into a desired shape and size by the film blowing unit 2; the film bubble is cooled and shaped under the action of the cooling air blown out by the air ring, and the air ring can be an externally cooled adjustable air ring, which can adjust the opening degree of the inlet air port and the different opening degrees at different locations to control the cooling effect, which is beneficial to the control of the thickness and uniformity of the film, and the cooled and shaped film bubble passes through the herringbone plate, the herringbone plate squeezes the film bubble to make it a sheet, and then enters the traction mechanism 3.

[0045] The traction mechanism 3 includes: a traction frame 31, a traction roller group 32 rotatably mounted on the traction frame 31, a power component 33 for driving the traction roller to rotate, and an adjustment component 34 for adjusting the angle of the traction roller; the traction roller group 32 is composed of an active traction roller 321 and a passive traction roller 322; an installation box 35 is provided on the outer side of the traction frame 31, and the power component 33 and the fan are both arranged in the installation box 35; an electric control cabinet 36 is provided on one side of the installation box 35.

[0046] The power assembly 33 includes: a motor 331, a first gear 332 fixedly connected to the output end of the motor 331, a first synchronous belt 333 transmission-connected to the first gear 332, and a second gear 334 transmission-connected to the first synchronous belt 333. The second gear 334 is rotatably mounted on the traction frame 31, and the second gear 334 is coaxially connected to the active traction roller 321; the active traction roller 321 is also coaxially connected to a third gear 335, the third gear 335 is staggered with the second gear 334, the third gear 335 is transmission-connected to the second synchronous belt 336, the second synchronous belt 336 is transmission-connected to the fourth gear 337, and the fourth gear 337 is coaxially connected to the passive traction roller 322.

[0047] The adjustment assembly 34 includes: a telescopic cylinder 341 fixedly mounted on the traction frame 31, and an adjustment member 342 connected to the output end of the telescopic cylinder 341; one end of the adjustment member 342 is rotatably mounted on the traction frame 31, and the middle part of the adjustment member 342 is hinged to the output end of the telescopic cylinder 341, and the other end of the adjustment member 342 is rotatably connected to an adjustment roller, which is rotatably mounted on the traction frame 31.

[0048] A fan 35 is provided on one side of the traction frame 31 , and an air outlet end of the fan 35 is connected to the interior of the active traction roller 321 through a ventilation pipeline, so as to blow air into the interior of the active traction roller 321 .

[0049] The active traction roller 321 is composed of a shell 3211, a connecting rod 3212 fixedly mounted at both ends of the shell 3211, a connecting plate 3213 rotatably mounted at both ends of the shell 3211, a cooling hole 3214 opened on the surface of the shell 3211, and a sealing component 3215 rotatably mounted on the shell 3211; the shell 3211 is annular, the connecting rod 3212 is used for rotatably connecting with the traction frame 31, and the connecting plate 3213 is a circular connecting plate 3213, on which a connecting through hole 3214 is opened. 2131, the connecting through hole 32131 is connected to the ventilation duct, and the connecting plate 3213 is rotatably connected to the outer shell 3211 and does not rotate with the rotation of the outer shell 3211; the connecting rod 3212 is composed of a connecting ring 32121 and a plurality of rod bodies 32122 evenly distributed along the axial direction and installed on the connecting ring 32121, the connecting ring 32121 is coaxially connected to the second gear 334, and the connecting ring 32121 is driven to rotate through the second gear 334, thereby driving the active traction roller 321 to rotate.

[0050] The sealing assembly 3215 is used to seal the cooling hole 3214; the sealing assembly 3215 is composed of a plurality of sealing plates 32151 connected in sequence, a hinge rod 32152 hingedly connecting two adjacent sealing plates 32151, abutment blocks 32153 fixedly installed on the outside of the sealing plates 32151 at both ends, and a spring 32154 connecting the abutment blocks 32153 and the outer shell 3211; the outer side surface of the abutment blocks 32153 is inclined; an inclined block 323 matching the abutment blocks 32153 is installed on the traction frame 31; the middle part of the sealing plate 32151 is rotatably connected to the cooling hole 3214; when the active traction roller 321 rotates, the abutment blocks 32153 abut against or separate from the inclined blocks 323; when the abutment blocks 32153 abut against the inclined blocks 323, the abutment blocks 32153 move toward the outer shell 3211 contracts internally, causing the sealing plate 32151 to swing along the cooling hole 3214, so that the gas is ejected from the gap between the sealing plate 32151 and the cooling hole 3214, and the jet direction changes with the swing of the sealing plate 32151, that is, the gas is ejected from the middle to both sides; the ejected gas can cool the active traction roller 321 and the plastic film on the one hand, and on the other hand, it can blow the plastic film to the axial ends of the active traction roller 321, so that the plastic film is unfolded outward, thereby making the plastic film smoother; when the temperature of the active traction roller 321 is too high, it may be necessary to stop for cooling or maintenance, which will interrupt the production process and reduce production efficiency. The cooling method of the fan 35 can continuously dissipate heat for the traction roller during the operation of the equipment, reduce the downtime caused by excessive temperature, and improve production efficiency.

[0051] The cooling holes 3214 are opened on the outer surface of the shell 3211 , and are arranged along the axial direction of the shell 3211 . When viewed from the circumference of the shell 3211 , the distribution angle of the cooling holes 3214 is between 10 and 45 degrees.

[0052] The outer wall of the active traction roller 321 is detachably mounted with a smear member 3216, which is arc-shaped, and a capsule 3217 is arranged inside the active traction roller 321, which is located on the inner side of the smear member 3216, and the position of the capsule 3217 and the smear member 3216 are adapted, and there is a gap between the capsule 3217 and the smear member 3216, and the gap forms a liquid flow channel; one end of the capsule 3217 is fixedly mounted on the connecting rod 3212, and an air inlet is provided on the capsule 3217, and the air inlet matches the air outlet of the ventilation duct, and the smear member 3216 is a coating component used for applying special coatings to the surface of the plastic film, and the special coatings are such as waterproof coatings, antistatic coatings, oil-proof coatings, etc.

[0053] The air outlet end of the capsule 3217 is connected to an air pipe, and the air outlet end of the air pipe is connected to a liquid storage tank 3218, which is installed on one side of the traction frame 31; the liquid storage tank 3218 is composed of a storage chamber 32181, a pressurizing chamber 32182, and a slide plate 32183 slidably installed between the storage chamber 32181 and the pressurizing chamber 32182; the storage chamber 32181 is used to inject the coating liquid into the liquid flow channel; the upper opening of the pressurizing chamber 32182 An air inlet is provided, which is connected to the air outlet end of the air pipe; a one-way valve is installed between the air inlet and the air pipe, and the outlet of the one-way valve is toward the pressurizing chamber 32182; a one-way valve is installed between the storage chamber 32181 and the liquid flow channel, and the outlet of the one-way valve is toward the liquid flow channel to prevent the liquid from flowing back into the storage chamber 32181; preferably, a limit strip can be provided on the inner wall of the liquid storage tank 3218 to assist in limiting the slide plate 32183.

[0054] When the active traction roller 321 rotates, the passive traction roller 322 is driven to rotate through the synchronous belt. At the same time, when the shell 3211 of the active traction roller 321 rotates, the shell 3211 and the connecting plate 3213 rotate relatively. During this process, the inclined block 323 abuts against the abutment block 32153, so that the air outlet of the seal is gradually aligned with the cooling hole 3214, so that the gas is sprayed from the cooling hole 3214 to the plastic film, and then the inclined block 323 is separated from the abutment block 32153, and then the air outlet of the ventilation pipeline is aligned and separated with the air inlet assembly of the bladder 3217. During this process, the inside of the bladder 3217 is inflated, and the smearing liquid in the gap between the bladder 3217 and the smearing member 3216 is evenly squeezed to the smearing member 3216. Inside, the active traction roller 321 continues to rotate, clamping the smear member 3216 in contact with the plastic film, and smearing the smear liquid onto the plastic film; the active traction roller 321 continues to rotate and continues to inflate the shell 3211. At this time, the air pressure in the shell 3211 is enhanced, squeezing the capsule 3217, and the capsule 3217 contracts to pressurize the liquid storage chamber, so that the smear liquid in the liquid storage chamber flows into the gap between the capsule 3217 and the smear member 3216 to be used in the next cycle; since the active traction roller 321 rotates at a uniform speed, the pressure applied to the liquid storage chamber is constant, and the smear liquid can be squeezed out quantitatively; and the intermittent liquid supply method can also avoid excessive accumulation of liquid on the smear roller, reducing the occurrence of problems such as uneven coating thickness or sagging.

[0055] A rotating rod 32184 is rotatably installed in the storage chamber 32181, and the rotating rod 32184 is coaxially spirally connected with a threaded sleeve 32185, and the threaded sleeve 32185 is fixedly connected to the slide plate 32183; when the airbag squeezes the slide plate 32183, the slide plate 32183 slides downward, driving the threaded sleeve 32185 to slide synchronously, and then driving the rotating rod 32184 to rotate, and during the rotation of the previous rotating rod 32184, it is separated from the liquid outlet of the sealing chamber, and the coating liquid flows from the sealing chamber to the liquid flow channel until the next rotating rod 32184 is connected to the liquid outlet of the sealing ring, at which time the slide plate 32183 stops sliding; during the rotation of the rotating rod 32184, the coating liquid is stirred on the one hand, and the liquid outlet can be sealed on the other hand.

[0056] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0057] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A plastic film blowing machine, comprising: A film blowing unit for mixing plastic particles and blowing film, characterized by a traction mechanism for traction of the plastic film after the film is blown; The traction mechanism comprises: a traction frame, a traction roller group rotatably mounted on the traction frame, a power component for driving the traction roller group to rotate, and an adjustment component for adjusting the angle of the traction roller; The traction roller group is composed of an active traction roller and a passive traction roller; A fan, used for ventilating the interior of the active traction roller; The active traction roller comprises: a shell, connecting rods fixedly mounted at both ends of the shell, connecting plates rotatably mounted at both ends of the shell, cooling holes opened on the surface of the shell, and a sealing assembly for sealing the cooling holes; The sealing assembly comprises: a sealing plate rotatably mounted on the cooling hole, a hinge rod connecting two adjacent sealing plates, an abutment block driving the sealing plate to swing, and a spring connecting the abutment block and the housing; The traction frame is provided with an inclined block abutting against the abutting block; The outer wall of the active traction roller is detachably mounted with a smearing member, and a capsule is arranged inside the active traction roller, the capsule is adapted to the position of the smearing member, and a liquid flow channel is provided between the capsule and the smearing member; an air inlet is provided on the capsule, and the air inlet is connected to or staggered with the air outlet end of the fan during the rotation of the active traction roller; When the air inlet is connected to the air outlet of the fan, the capsule expands and squeezes the liquid flow channel, squeezing the liquid into the smear member; When the air inlet is staggered with the air outlet of the fan, the fan squeezes the capsule.

2. A plastic film blowing machine as claimed in claim 1, characterized in that: Also includes: liquid storage tank; The liquid storage box is composed of a storage chamber, a pressurizing chamber, and a slide plate slidably installed between the storage chamber and the pressurizing chamber; The pressurizing chamber is in communication with the air outlet end of the bladder; The liquid outlet end of the storage cavity is communicated with the liquid flow channel.

3. A plastic film blowing machine as claimed in claim 2, characterized in that: A rotating rod is rotatably installed in the storage cavity, and a threaded sleeve is coaxially spirally connected to the rotating rod, and the threaded sleeve is fixedly connected to the slide plate.

4. A plastic film blowing machine as claimed in claim 3, characterized in that: One-way valves are arranged between the pressurizing chamber and the capsule, and between the storage chamber and the liquid flow channel.

5. A plastic film blowing machine as claimed in claim 4, characterized in that: The cooling hole and the smearing member are sequentially arranged along the axial direction of the housing.

6. A plastic film blowing machine as claimed in claim 1, characterized in that: The power assembly includes: a motor, a first gear fixedly connected to the output end of the motor, a first synchronous belt transmission-connected to the first gear, a second gear transmission-connected to the first synchronous belt, the second gear rotatably mounted on the traction frame, and the second gear is coaxially connected to the active traction roller.

7. A plastic film blowing machine as claimed in claim 6, characterized in that: The adjustment assembly comprises: a telescopic cylinder fixedly mounted on the traction frame, and an adjustment member connected to the output end of the telescopic cylinder; the adjustment member is rotatably mounted on the traction frame and connected to an adjustment roller, and the adjustment roller is rotatably mounted on the traction frame.

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