CN213675441U - Film cooling buffer frame of film blowing machine - Google Patents

Abstract

The utility model provides a film cooling buffer frame of a film blowing machine, which comprises a frame body and a cooling mechanism, wherein the cooling mechanism comprises two heat-conducting plates which are oppositely arranged, the two heat-conducting plates are respectively arranged at the two sides of a film and arranged with the gap of the film, and the sides of the two heat-conducting plates which are deviated from each other are provided with a plurality of groups of radiating fin groups; the plurality of groups of radiating fin groups are arranged along the longitudinal direction, and each group of radiating fin group comprises a plurality of radiating fins which are transversely arranged side by side. The utility model discloses set up cooling body on the buffer frame, the heat dissipation principle of lamps and lanterns is used for reference, utilize the higher heat-conducting plate of coefficient of heat conductivity to dispel the heat with film outlying high temperature air (film and heat-conducting plate clearance setting, thermal transmission mode on the film is the air of transmitting earlier to with film contact, air transmits to the heat-conducting plate again) fast, can effectively improve the cooling radiating effect of film under the same length, under guaranteeing the same cooling radiating effect, can effectively shorten the distance between a plurality of guide rolls, the space that reduces the buffer frame accounts for than.

Description

Film cooling buffer frame of film blowing machine

Technical Field

The utility model relates to a film processing technology field, in particular to film cooling buffer frame of inflation film manufacturing machine.

Background

The film blowing machine is a working machine for heating and melting plastic particles and then blowing the plastic particles into a film, and mainly comprises an extruder, a machine head, a film head, a cooling device, a foam stabilizing frame, a herringbone plate, a traction roller, a winding device and the like.

As shown in fig. 1 and 2, when the film blowing machine works, dry plastic particles are introduced into an extruder 102 from a feed hopper 101, a spiral feed rod arranged in the extruder 102 spirally feeds the plastic particles in a direction away from the feed hopper 101, the extruder 102 is provided with a heating assembly to continuously heat the plastic particles in the moving process until the plastic particles are in a molten state, the plastic in the molten state enters a die head of the extruder 102 after being filtered by a filtering device 103 arranged at a head of the extruder 102, is blown out of the die head, is cooled by an air ring 104, and then is wound up by a first drawing roller 105, a second drawing roller 106, a first guide roller 107, a second guide roller 108, a third guide roller 109, a pressing shaft 110 and a driving roller 111 until a winding shaft 112.

The first drawing roll, the second drawing roll, the first guide roll and the second guide roll are all arranged on a buffer frame 114 matched with the film blowing machine.

Because the temperature of the film led out from the wind ring is relatively high and the softness is high, if the film led out from the wind ring is rapidly cooled by adopting a ventilation cooling mode, the local deformation of the film is easily caused by adopting the cooling mode because the wind speed and the local wind quantity are not easy to control; and the adoption chill roll cooling's mode leads to the tensile rate of film again easily not good (chill roll cooling makes film temperature shock dip easily), so all cool down the film through setting up the distance between first guide roll and the second guide roll among the prior art, utilize the natural cooling mode.

However, the space occupation ratio of the buffer frame is easily large due to the excessively high/long distance between the first guide roller and the second guide roller, which is not favorable for the arrangement of the production place, so that it is necessary to provide a buffer frame capable of cooling the film without changing the performance of the film, so as to reduce the space occupation ratio of the buffer frame.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides a film cooling buffer frame of inflation film manufacturing machine has solved among the prior art buffer frame space and has accounted for than great problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a film cooling buffer frame of a film blowing machine comprises a frame body and a plurality of guide rollers arranged on the frame body and used for guiding a film, wherein a cooling mechanism used for cooling the film is arranged on the frame body, the cooling mechanism comprises two heat-conducting plates which are oppositely arranged, the two heat-conducting plates are respectively arranged on two sides of the film and arranged in a gap with the film, and a plurality of groups of radiating fin groups are arranged on the side surfaces of the two heat-conducting plates which are deviated from each other;

the plurality of groups of radiating fin groups are arranged along the longitudinal direction, and each group of radiating fin group comprises a plurality of radiating fins which are transversely arranged side by side.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses set up cooling body on the buffer frame, borrow for reference the heat dissipation principle of lamps and lanterns, utilize the higher heat-conducting plate of coefficient of heat conductivity to carry out the quick heat dissipation with the high temperature air of film periphery (film and heat-conducting plate clearance set up, the thermal transmission mode on the film is the air of transmitting to with film contact earlier, the air transmits to the heat-conducting plate again), can effectively improve the cooling radiating effect of film under the same length, under the same cooling radiating effect of assurance, can effectively shorten the distance between a plurality of guide rolls, reduce the space proportion of buffer frame; the added radiating fins can increase the radiating area of the heat conducting plate, increase the contact area of the heat conducting plate and external cold air, improve the radiating efficiency, reduce the radiating time and shorten the distance of a plurality of guide rollers for radiating and cooling the film; and the utility model discloses avoid the problem that makes the local deformation of film easily that the forced air cooling mode brought, still avoided the problem that influences the tensile rate of film through the chill roll cooling.

Drawings

FIG. 1 is a view showing the installation of a film blowing machine and a buffer frame in the prior art;

FIG. 2 is a schematic view of the installation of the buffer frame and a plurality of guide rollers in FIG. 1;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a partial schematic view of the two heat-conducting plates and the supporting rod of the present invention;

FIG. 5 is a schematic view of the present invention showing the connection between the rotary screw and the driving shaft;

FIG. 6 is a top view of the heat-conducting plate and the heat sink of the present invention;

FIG. 7 is a top view of the heat sink structure of the present invention;

fig. 8 is a sectional view of the heat sink of the present invention.

In the figure: 1. a heat conducting plate; 2. a heat sink; 3. a second guide roller; 4. a reflux section; 5. a support bar; 6. a guide bar; 7. a snake pipe section; 8. rotating the screw rod; 9. a third guide roller; 10. a fourth guide roller; 11. a circulation pump; 12. a water storage chamber; 13. a partition plate; 14. a cooling chamber; 15. a stirrer; 16. a circulating water tank; 17. a water guide section; 18. a connecting seat; 19. a water inlet pipe; 21. a heat conducting section; 22. a heat dissipation cavity; 81. a second pulley; 82. a drive belt; 83. a drive shaft; 84. a first pulley; 85. a motor; 61. and a stop block.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 3, the embodiment of the utility model provides a film cooling buffer frame of inflation film manufacturing machine, be used for on support body and the support body carrying out a plurality of guide rolls that lead to the film, the utility model discloses the support body that sets up is including being four spinal branch vaulting poles 5 that the rectangle set up to still be equipped with a plurality of anchor strut between the arbitrary double-phase adjacent bracing piece 5 of rectangle side. The guide rollers are arranged between any two adjacent support bars 5 along the sides of the rectangle. The utility model is provided with four guide rollers on the frame body, and the installation positions from top to bottom are respectively a first guide roller (not shown in the figure), a second guide roller 3, a third guide roller 9 and a fourth guide roller 10; the first guide roller and the second guide roller 3 are mainly used for drawing the film led out by the wind ring, the distance between the second guide roller 3 and the fourth guide roller 10 is used for controlling the cooling distance of the film, and the third guide roller 9 is arranged for effectively tensioning the film due to the fact that the distance between the second guide roller 3 and the fourth guide roller 10 is long.

As shown in fig. 3, in order to effectively reduce the distance between the second guide roller 3 and the fourth guide roller 10 and reduce the space occupation ratio of the frame body, the utility model discloses a cooling mechanism for cooling the film is also arranged on the frame body, the cooling mechanism is mainly arranged between the second guide roller 3 and the third guide roller 9, specifically, the cooling mechanism comprises two heat-conducting plates 1 which are oppositely arranged, the two heat-conducting plates 1 are respectively arranged on the two sides of the film and arranged in the gap with the film, and the side surfaces of the two heat-conducting plates 1 which are deviated from each other are both provided with a plurality of groups of cooling fin groups; the plurality of groups of radiating fin groups are arranged along the longitudinal direction, and each group of radiating fin group comprises a plurality of radiating fins 2 which are arranged side by side in the transverse direction. The utility model discloses set up cooling body on the buffer frame, use the heat dissipation principle of lamps and lanterns for reference, utilize heat-conducting plate 1 that coefficient of heat conductivity is higher to carry out quick heat dissipation with the high temperature air of film outlying (film and heat-conducting plate 1 clearance set up, the thermal transmission mode on the film is the air of transmitting to with the film contact earlier, it transmits to heat-conducting plate 1 to have the air again), can effectively improve the cooling radiating effect of film under the same length, under the same cooling radiating effect of assurance, can effectively shorten the distance between a plurality of guide rolls, reduce the space proportion of buffer frame; the added radiating fins 2 can increase the radiating area of the heat conducting plate 1, increase the contact area of the heat conducting plate 1 and external cold air, improve the radiating efficiency, reduce the radiating time and shorten the distance of a plurality of guide rollers for radiating and cooling the film.

As shown in fig. 6, 7 and 8, in order to further improve the heat dissipation effect of the heat dissipation plate 2, the heat dissipation plate 2 of the present invention includes a plurality of heat conduction sections 21 and a plurality of heat dissipation cavities 22, which are sequentially staggered along the length direction of the heat dissipation plate, wherein the heat conduction section 21 located at the end portion installation position is connected with the heat conduction plate 1; the heat dissipation cavity 22 is a flaring through cavity structure perpendicular to the length direction of the heat dissipation fins 2, any two adjacent heat dissipation cavities 22 are arranged in opposite flaring directions, and the heat conduction section 21 is arranged between any two outer side walls opposite to each other of the adjacent heat dissipation cavities 22.

When heat is transferred to the heat dissipation cavity 22 located at the first installation position through the heat conduction section 21 at the end installation position, the heat exchanges heat with air from the side wall of the heat dissipation cavity 22 (in the process that the heat conduction section 21 transfers heat to the heat dissipation cavity 22, heat energy can also be scattered from the heat conduction section 21 to the air), when the heat led out from the side wall of the heat dissipation cavity 22 exchanges heat with air in the inner cavity of the heat dissipation cavity 22, the led-out heat exchanges heat with air close to the inner wall of the heat dissipation cavity 22 firstly, heated air molecules accelerate to move and collide with other low-temperature air molecules to consume the heat energy, and the heat energy is further dispersed in the air; because the heat dissipation cavity 22 arranged in the utility model is a flaring through cavity structure, the high-energy molecules can be easily led out from the big end of the flaring through cavity structure through the rebound of the inner wall of the heat dissipation cavity 22 in the process of rapid movement, and because the pressure in the heat dissipation cavity 22 of the through cavity structure is basically kept consistent, when the high-temperature air molecules are led out of the heat dissipation cavity 22, the low-temperature air molecules can easily enter the heat dissipation cavity 22 from the small end of the flaring through cavity structure of the heat dissipation cavity 22 so as to keep the stable air pressure in the heat dissipation cavity 22; the heat dissipation process of the heat conduction section 21 and the heat dissipation cavity 22 led to the rear mounting position is the same as the heat dissipation principle of the front heat dissipation cavity 22, but the transferred heat energy is gradually reduced and transferred until the heat energy led to the heat dissipation fins 2 is completely led into the air.

High-temperature air molecules are led out from the large end of the flaring through cavity structure of the radiating cavity 22, and low-temperature air molecules are led in from the small end of the flaring through cavity structure of the radiating cavity 22, so that certain micro air flow can be formed in the flaring through cavity structure of the radiating cavity 22, and the radiating effect of the radiating fin 2 is improved; the utility model discloses set heat dissipation chamber 22 with fin 2 to add the structure of heat conduction section 21, compare with the fin 2 of rectangle structure, under the condition of the same heat dissipation length, the utility model discloses the fin 2 that sets up has bigger heat radiating area, and the radiating effect is better.

As shown in fig. 3, for further accelerating the cooling effect of the cooling component to the film, the utility model discloses still include the circulation water supply component who uses with the cooling body cooperation, circulation water supply component all is connected with circulating pump 11 including two circulating water pipe that circulating water tank 16 and both ends that are used for supplying water all are connected with circulating water tank 16 on every circulating water pipe, and every circulating water pipe sets up with the contact of the multiunit fin group that sets up on every heat-conducting plate 1. The circulating water pipe consists of a water guide section 17, a coil pipe section 7 and a backflow section 4 which are connected in sequence, and the circulating pump 11 is arranged on the water guide section 17; the snake pipe section 7 is bent along a plurality of groups of radiating fins, so that the snake pipe section 7 can be in contact with each radiating fin 2; the coil pipe section 7 adopts an iron pipe or a steel pipe with good heat conduction effect, the heat exchange effect is increased, and the coil pipe section 7 is fixedly connected with the heat conduction plate 1 through connecting modes such as hoops; the return section 4 communicates with a circulation tank 16. The connection part of the backflow section 4, the water guide section 17 and the snake pipe section 7 is of a hose structure (a certain length allowance is reserved), so that the whole use of the circulating water pipe cannot be influenced when the position of the heat conduction plate 1 is changed conveniently.

The utility model discloses the temperature of leading-in water in the circulating water pipe is 20 ℃ -25 ℃, avoids the temperature to hang down reverse heat conduction excessively to make the temperature on the heat-conducting plate 1 hang down excessively for the difference in temperature of air is too big between film and the heat-conducting plate 1, influences the tensile ratio of film. The utility model discloses leading-in water in the circulating water pipe is leading-in from circulating water tank 16, can keep at 20 ℃ -25 ℃ for making the temperature in the circulating water tank 16, as shown in fig. 3, the utility model discloses the circulating water tank 16 who sets up divide into cooling chamber 14 and water storage chamber 12 through baffle 13, and baffle 13 highly is less than circulating water tank 16 inner chamber height, makes things convenient for the water overflow in the cooling chamber 14 to the water storage chamber 12 in. Wherein the water inlet end of the circulating water pipe is arranged at the position of the water storage cavity 12 close to the bottom, the water outlet end of the circulating water pipe is arranged at the position of the cooling cavity 14 close to the bottom, and a stirrer 15 is arranged in the cooling cavity 14 and used for cooling the water in the cooling cavity 14 (the room temperature is usually 20-25 ℃); or when the temperature of the plant is high, a cooler may be provided in the cooling chamber 14 to cool the water in the cooling chamber 14. The cooled water overflows into the water storage cavity 12 and continuously takes away the temperature on the radiating fins 2 through a circulating water pipe. When the circulating water supply assembly is used for the first time, water can be injected into the water storage cavity 12 in a water adding pipe mode, and the water is stopped to be added after water can circulate between the circulating water tank 16 and the circulating water pipe; and a water inlet pipe 19 can be connected in the water storage cavity 12, so that water can be conveniently injected into the water storage cavity 12. In addition, water needs to be added into the water storage chamber 12 periodically during the use process because of volatilization in the process of water circulation and heat dissipation.

In order to facilitate the adjustment of the distance between the heat conducting plate 1 and the film and to facilitate the film blowing machine to pass the film through the first guide roller, the second guide roller 3, the third guide roller 9 and the fourth guide roller 10 in order when the film blowing machine starts to produce the film, the utility model is also provided with a displacement assembly for adjusting the size of the gap between the heat conducting plate 1 and the film, as shown in fig. 4 and 5, the displacement assembly comprises two parallel rotating screw rods 8 and at least one guide rod 6 parallel to the rotating screw rods 8; the utility model discloses two that guide bar 6 and level that set up side by side, two guide bar 6 all with 5 fixed connection of bracing piece, all be equipped with two sliding through groove that set up side by side on every heat-conducting plate 1, two sliding through groove and 6 sliding connection of two guide bars, two guide bar 6 can heat-conducting plate 1 and bracing piece 5 fix a position the installation. In order to prevent the heat-conducting plate 1 from being separated from the guide bar 6, stoppers 61 are further provided at both ends of the guide bar 6.

In order to conveniently adjust the distance between the two heat conducting plates 1, the two rotating lead screws 8 arranged in the utility model are arranged side by side and are positioned at four corner positions of a cuboid with the two guide rods 6, and the two rotating lead screws 8 are respectively connected with the support rod 5 through the connecting seats 18 arranged on the frame body, and the rotating lead screws 8 are rotatably connected with the connecting seats 18 through bearings; each rotating screw rod 8 is respectively provided with a left-handed thread and a right-handed thread, and the two heat conduction plates 1 are respectively in threaded connection with the left-handed thread and the right-handed thread; the two rotating screw rods 8 are driven by the driving assembly to rotate, and the rotating screw rods 8 rotate to drive the two heat conduction plates 1 to move towards the film or move away from the film.

As shown in fig. 5, for two rotation lead screws 8 of drive assembly synchronous drive, the utility model discloses set up drive assembly includes through motor 85 driven drive shaft 83, two first belt pulleys 84 and two second belt pulleys 81 of setting in drive shaft 83, two second belt pulleys 81 respectively with two rotation lead screws 8 coaxial settings, and two second belt pulleys 81 and two first belt pulleys 84 one-to-one and be connected through driving belt 82. The driving shaft 83 is connected with the support rod 5 in a rotating manner, and the motor 85 can be a servo motor 85, so that the rotating speed and the rotating number of the rotating screw rod 8 can be controlled conveniently.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (5)

1. The utility model provides a film cooling buffering frame of inflation film manufacturing machine, is used for carrying out a plurality of guide rolls that lead to the film that set up on support body and the support body, its characterized in that: the frame body is provided with a cooling mechanism for cooling the film, the cooling mechanism comprises two heat-conducting plates which are oppositely arranged, the two heat-conducting plates are respectively arranged on two sides of the film and are arranged in a gap with the film, and the side surfaces of the two heat-conducting plates, which are deviated from each other, are respectively provided with a plurality of groups of radiating fin groups;

the plurality of groups of radiating fin groups are arranged along the longitudinal direction, and each group of radiating fin group comprises a plurality of radiating fins which are transversely arranged side by side.

2. The film cooling buffer frame of the film blowing machine according to claim 1, characterized in that: the radiating fin comprises a plurality of heat conducting sections and a plurality of radiating cavities which are sequentially arranged in a staggered manner along the length direction of the radiating fin, and the heat conducting sections positioned at the end mounting positions are connected with the heat conducting plate;

the heat dissipation cavity is a flaring through cavity structure perpendicular to the length direction of the heat dissipation fins, any two adjacent heat dissipation cavities are arranged in opposite flaring directions, and the heat conduction section is arranged between any two outer side walls opposite to each other.

3. The film cooling buffer frame of the film blowing machine according to claim 1 or 2, characterized in that: still include the circulation water supply subassembly, the circulation water supply subassembly all is connected with two circulating water pipe that circulating water tank is connected including the circulating water tank that is used for supplying water and both ends, all is connected with the circulating pump on every circulating water pipe, and the multiunit fin group contact setting that sets up on every circulating water pipe and every heat-conducting plate.

4. The film cooling buffer frame of the film blowing machine according to claim 1 or 2, characterized in that: the film-forming device also comprises a displacement assembly for adjusting the size of a gap between the heat conducting plate and the film, wherein the displacement assembly comprises two parallel rotating screw rods and at least one guide rod parallel to the rotating screw rods;

the guide rod is fixedly connected with the frame body and is in sliding connection with the two heat conduction plates;

the rotary screw rod is rotatably connected with the frame body, the rotary screw rod is respectively provided with a left-handed thread and a right-handed thread, and the two heat conduction plates are respectively in threaded connection with the left-handed thread and the right-handed thread;

the two rotating screw rods are driven to rotate by the driving assembly, and the rotating screw rods rotate to drive the two heat conducting plates to move towards the film or move away from the film.

5. The film cooling buffer frame of the film blowing machine according to claim 4, characterized in that: the driving assembly comprises a driving shaft driven by a motor, two first belt pulleys and two second belt pulleys, the two first belt pulleys and the two second belt pulleys are arranged on the driving shaft, the two second belt pulleys are coaxially arranged with the two rotating screw rods respectively, and the two second belt pulleys are in one-to-one correspondence with the two first belt pulleys and are connected through a transmission belt.

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