CN112622251B

CN112622251B - Five-layer co-extrusion film blow molding machine

Info

Publication number: CN112622251B
Application number: CN202011604051.7A
Authority: CN
Inventors: 曹玉
Original assignee: Chongqing Ruiting Plastic Co Ltd
Current assignee: Chongqing Ruiting Plastic Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-09-30
Anticipated expiration: 2040-12-30
Also published as: CN112622251A

Abstract

The invention belongs to the technical field of plastic film forming or manufacturing equipment, and discloses a five-layer co-extrusion film blow molding machine which comprises a machine head, a foam stabilizer and an extrusion device, wherein the extrusion device comprises a machine barrel, an extrusion shaft and a motor, a hopper is arranged on the machine barrel, the extrusion shaft comprises an extrusion section and a mixing section, a spiral guide piece is arranged outside the extrusion section, a high-temperature-resistant film is wrapped outside the mixing section, and a mixing lug is arranged on the high-temperature-resistant film; the high-temperature-resistant film reciprocating motion device also comprises a driving piece for driving the high-temperature-resistant film to reciprocate; the machine head comprises a mandrel and a plurality of distribution discs, a gathering flow channel and a circular flow channel are arranged in the mandrel, an annular flow channel is arranged on each distribution disc, and material inlets are arranged outside each distribution disc and at the bottom of the mandrel; the sum of the number of the circular flow channels and the number of the distribution discs is five. The invention solves the problem that in the existing material extrusion process, the space design of an extruder is small so as to facilitate the extrusion and the pushing of the material, so that the raw materials cannot be fully mixed, and the components of each raw material in the extruded molten material are not uniformly distributed.

Description

Five-layer co-extrusion film blow molding machine

Technical Field

The invention belongs to the technical field of plastic film forming or manufacturing equipment, and particularly relates to a five-layer co-extrusion film blow molding machine.

Background

A composite film, that is, a film (usually an odd number of layers) including a multilayer structure, the composite film includes a skeleton layer located in the middle and functional layers located on both sides, and the skeleton layer is usually made of cheap materials; the functional layer is usually made of a material having one of special functions of sealing or damping, friction, shielding, flame retardance, heat resistance, sound absorption, heat insulation, adhesion and the like, and the material is expensive. The composite film formed by co-extruding a plurality of different materials has higher use effect and lower cost, thereby being widely used; the currently commonly used composite film is a five-layer composite film.

The composite film is formed by extrusion molding through a co-extrusion film blow molding machine, generally comprises an extrusion device, a machine head and a bubble stabilizer, plastic particles are melted and mixed through the extrusion devices and then extruded into the machine head, and the plastic particles enter the bubble stabilizer to be blown and cooled for molding after forming film bubbles in the machine head, and then are rolled to form the composite film.

However, when plastic particles are melted and mixed in the extrusion device, the extrusion device is pushed by a screw, so that the mixing space of the materials is limited, the melted materials cannot be mixed well, various components in the extruded materials are not distributed uniformly, and the quality of the formed composite film is affected.

Disclosure of Invention

The invention aims to provide a five-layer co-extrusion film blow molding machine, which aims to solve the problem that in the existing material extrusion process, the raw materials cannot be fully mixed, so that the distribution of each raw material component in the extruded molten material is uneven, and the extrusion and the pushing of the materials are facilitated, and the space design of an extruder is small.

In order to achieve the purpose, the invention provides the following technical scheme that the five-layer co-extrusion film blow molding machine comprises a machine head, a bubble stabilizer and an extrusion device for extruding materials into the machine head, wherein the extrusion device comprises a machine barrel, the machine barrel comprises an open extrusion end and a closed driving end, an extrusion shaft penetrating through the driving end is coaxially fixed in the machine barrel, the machine barrel further comprises a motor for driving the extrusion shaft to rotate, the top of one end, close to the motor, of the machine barrel is also communicated with a hopper, and a heating coil is wound on the side wall of the machine barrel; the machine head comprises a mandrel and a plurality of distribution discs which are overlapped outside the mandrel, a collecting flow channel is formed between the distribution discs and the mandrel, annular flow channels communicated with the collecting flow channel are arranged on the distribution discs, and a material inlet respectively communicated with each annular flow channel is arranged outside each distribution disc; the extrusion shaft comprises a plurality of extrusion sections and mixing sections which are arranged in a crossed mode, the extrusion sections are arranged at the positions, close to the driving end and the extrusion end, of the extrusion shaft, and spiral guide pieces are arranged outside the extrusion sections; the mixing section is wrapped by a high-temperature resistant film, and a plurality of mixing lugs are arranged on the high-temperature resistant film; the device also comprises a driving piece for driving the high-temperature-resistant film to reciprocate along the radial direction of the mixing section; the mandrel is also internally provided with circular runners which are sequentially arranged from inside to outside, the circular runners are communicated with the gathering runner, and the bottom of the mandrel is also provided with a plurality of material inlets which are respectively communicated with the circular runners; the sum of the number of the circular ring flow passages and the number of the distribution disks is five.

The technical principle of the technical scheme is as follows:

the raw material particles are heated and melted in the machine barrel through a heating coil, and the extrusion shaft rotates to drive the helical blades on the extrusion section to advance. After the raw materials enter the mixing section, the mixing lug is driven to rotate by the rotation of the extrusion shaft, and then the raw materials are mixed; simultaneously under the effect of driving piece for high temperature resistant membrane reciprocating motion, and then can realize mixing the position change of lug, and then promote the degree of consistency of mixing.

Along with the stirring, mixing and propelling of the raw materials in the machine barrel, the molten raw materials enter the circular flow channel and the annular flow channel from the extrusion section and the material inlet of the machine barrel respectively and are gathered in the gathering flow channel to form the film bubble with a multilayer structure. And drawing the film bubble into a bubble stabilizer for blowing, cooling and forming.

The beneficial effects of the technical scheme are as follows:

1. according to the technical scheme, the extrusion section and the mixing section are arranged, the materials do not have the force of moving forwards in the mixing section, so that the materials can be kept in a relatively stopped state, and the extrusion shaft drives the mixing lug to rotate, so that the materials can be uniformly mixed;

2. the high-temperature-resistant film can deform, and the driving piece drives the high-temperature-resistant film to deform, so that the mixing lug can move, and the uniformity of material mixing is improved;

3. the circular flow channel is arranged on the mandrel, so that the number of distribution discs can be reduced, the size of the co-extrusion film blowing machine head is reduced, and the use cost is reduced.

In conclusion, the technical scheme improves the structures of the extrusion device and the machine head, so that the raw materials are higher in melting and mixing uniformity, and the quality of the prepared composite film is improved; meanwhile, the circular flow channels are arranged in the mandrel, so that the number of the distribution pieces can be reduced, the cost of equipment is reduced, and the use cost is reduced.

Further, a driving cavity is coaxially arranged in the extrusion shaft, the driving piece comprises a plurality of push rods penetrating through the side wall of the extrusion shaft, each mixing section is provided with a push rod, one end of each push rod is in contact with the inner side of the high-temperature-resistant film, and the other end of each push rod is positioned in the driving cavity; the driving piece further comprises a first driving rod penetrating through one end, located outside the barrel, of the extrusion shaft, the first driving rod extends into the driving cavity, a plurality of cams used for driving the push rod to move in a reciprocating mode are arranged on the portion, located in the driving cavity, of the first driving rod, the number of the cams is consistent with the number of the mixing sections, and the cams are arranged at each mixing section.

Has the advantages that: because the extrusion axle rotates with first actuating lever to be connected, consequently the extrusion axle can rotate for first actuating lever, and then can make the intermittent type of push rod contact with the bulge of cam, realizes that the push rod slides along the lateral wall of extrusion axle, and intermittent type drives the mixed lug on the high temperature resistant membrane and takes place to remove, accomplishes the homogeneous mixing to the material.

Furthermore, a plurality of auxiliary heat channels wrapped outside the driving cavity are uniformly distributed in the extrusion shaft, and the extrusion shaft also comprises heat conduction pipes for leading a heat source into the auxiliary heat channels; a plurality of through holes which respectively communicate the auxiliary heat channels with the driving cavity are arranged in the extrusion shaft; the first driving rod is provided with a flow guide channel communicated with the driving cavity.

Has the advantages that: the heat pipe is used for guiding hot air into the auxiliary heat channel, so that the extrusion shaft can keep a higher temperature, and the melting effect on the material can be improved. And the hot gas entering the auxiliary heat channel for heating can flow out of the driving cavity along with the auxiliary heat channel and is led out through the flow guide channel on the first driving rod.

Furthermore, an installation block is rotatably connected to one end, located outside the barrel, of the extrusion shaft, a cavity communicated with the auxiliary heat channels is formed in the installation block, and the heat conduction pipe penetrates through the installation block and is communicated with the cavity; the first driving rod penetrates through the mounting block.

Has the beneficial effects that: the cavity is formed in the mounting block, and hot air can be introduced into all the auxiliary heat channels in the extrusion shaft by only utilizing one heat conduction pipe to introduce the hot air into the cavity.

Further, the first driving rod is rotatably connected with the mounting block, and the rotating direction of the first driving rod is opposite to that of the extrusion shaft; one end of the first driving rod, which is positioned outside the mounting block, is fixed with a rotating blade, the first driving rod is rotatably connected with a delivery pipe communicated with the flow guide channel, and the air outlet end of the delivery pipe positively rotates the rotating blade.

Has the advantages that: deriving gas from the water conservancy diversion passageway in the first actuating lever and carrying out the water conservancy diversion through the eduction tube to strike rotor blade, make rotor blade take place to rotate, and then can accomplish the rotation to first actuating lever, because the rotation direction of first actuating lever and extrusion axle is opposite, consequently make the rotation of push rod and cam all taking place opposite direction, improve the frequency that the cam drive push rod removed, thereby promote the degree of consistency to material stirring, mixture.

The foam stabilizer comprises an annular fixing frame, a plurality of supports are arranged on the inner ring of the fixing frame along the circumferential direction, a plurality of foam stabilizing rollers are arranged on each support, each layer of foam stabilizing rollers are arranged in a circle, the foam stabilizer also comprises a driving piece for driving the supports to move, the driving piece comprises a plurality of rotating shafts, a plurality of groups of lead screws and a motor for driving one of the rotating shafts to rotate, the number of the rotating shafts and the number of the lead screws are consistent with that of the supports, and the adjacent rotating shafts are driven by a belt; an annular cavity is arranged in the fixed frame, and the rotating shafts vertically penetrate through the top of the fixed frame and extend into the cavity; the screw rod of the screw rod is vertical to the rotating shaft, and the screw rod of the screw rod is transmitted with the rotating shaft through the bevel gear set; a sliding rod which penetrates through the inner side of the fixing frame and extends into the cavity is fixed on the support, the sliding rod slides along the radial direction of the fixing frame, and one end, located in the cavity, of the sliding rod is fixed on a sliding block of the lead screw.

Has the advantages that: through belt transmission, one of the rotating shafts can be rotated to drive all the rotating shafts to rotate synchronously, the lead screw is matched to complete synchronous displacement of the support, the displacement distance is consistent, the stabilized roller after adjustment is formed into a circle and cannot deform, the circle center is kept unchanged all the time, and the film bubble is conveniently pulled. And the bracket is driven through the lead screw, and compared with the driving method in the prior art in which a four-bar mechanism is used, the structure is simpler, the driving is more stable, and the probability of circular deformation formed by the stabilizing roller is reduced.

Furthermore, each bubble stabilizing roller comprises two horizontally arranged branch rollers, and the branch rollers are hinged on the support.

Has the advantages that: after the bracket drives the foam stabilizing roller to move, the angle of the two sub-rollers is adjusted to ensure that each layer of foam stabilizing roller has more regular circular size, so that better traction effect on the film foam can be ensured. And the branch roller is hinged on the bracket, so that the angle can be conveniently adjusted.

Furthermore, the two sides of each support are respectively provided with a linkage part, each linkage part is a Z-shaped communicating pipe, each communicating pipe comprises two transverse pipes with different openings and a vertical pipe, the two transverse pipes are parallel to the sliding rod, one transverse pipe penetrates through the inner side of the fixing frame and extends into the cavity, and the vertical pipe is perpendicular to the sliding rod; pistons are connected in the two transverse pipes in a sliding manner, communicating liquid is injected between the two pistons in the communicating pipes, a second driving rod is fixed on one piston, and one end, far away from the piston, of the second driving rod is fixed on the bracket; a transmission rod is hinged on the other piston, a linkage rod is hinged at one end of the transmission rod, which is far away from the piston, and the ends, which are far away from the bracket, of the branch rollers in the same row are fixed on the linkage rod; the inner diameter of the transverse pipe provided with the linkage rod is smaller than that of the transverse pipe provided with the second driving rod.

Has the advantages that: when the angle of the branch roller is adjusted, when the bracket drives the foam stabilizing roller to move towards the inner side of the fixing frame, the free end of the branch roller needs to move inwards relative to the bracket so that the shape of a circle formed by each layer of foam stabilizing roller is more regular, and therefore the film bubble can be conveniently pulled.

When the bracket drives the foam stabilizing roller to move, the bracket can drive the second driving rod connected with the bracket to move, so that one piston moves, and the other piston moves in the same direction with the piston driven by the communicating liquid and drives one end of the sub-roller, which is far away from the bracket, to move by the driving of the transmission rod. Because the inner diameter of the transverse pipe provided with the transmission rod is smaller than that of the other transverse pipe, the moving distance of the piston connected with the transmission rod is larger than that of the other piston, so that the moving distance of one end of the branch roller far away from the bracket is larger than that of one end connected with the bracket, and the shape of a circle formed by the foam stabilizing roller is more regular after the branch roller moves.

The multiple sub-rollers on the same side are fixed on the same linkage rod, so that the sub-rollers on the same side can synchronously move.

Further, a rotating sleeve is rotatably connected outside the sub-roller; the upper part of one side of the branch roller close to the middle part of the fixing frame is provided with a row of air guide holes communicated with the air storage cavity; a plurality of rows of air outlet holes which can be communicated with the air guide holes are arranged on the periphery of the rotating sleeve; the bracket is internally provided with a flow guide cavity and also comprises a cold air pipe communicated with the flow guide cavity and a connecting pipe for communicating the air storage cavity with the flow guide cavity.

Has the advantages that: set up and rotate the cover, at the in-process that the membrane bubble removed, the relative friction takes place for membrane bubble and rotation cover, can realize rotating the rotation of cover, compares the membrane bubble and directly takes place the friction with the steady bubble roller of stewing and compares, can reduce the probability that the damaged condition that the friction leads to appears.

When the air storage rack is used, cold air is guided into the flow guide cavity in the rack through the cold air pipe, and the cold air is guided into the air storage cavity through the connecting pipe to be stored. Along with the drawing of film bubble, relative friction takes place for film bubble and rotation cover to drive and rotate the cover and rotate, when rotating the cover and rotate to the venthole and divide the gas guide hole intercommunication on the roller, derive the air conditioning in the gas storage chamber, and blow and spill on the film bubble, realize cooling, shaping to the film bubble.

Further, a slide way communicated with the flow guide cavity is arranged in the slide rod, a limiting block is connected in the slide way in a sliding manner, a retaining ring is fixed on one side, away from the support, of the limiting block in the slide way, and a spring is arranged between the limiting block and the slide way; still include one and run through slide bar top lateral wall and extend to slide in the locating lever, the locating lever is located one of the outer slide and serves and be equipped with the sucking disc, and the sucking disc is equipped with the through-hole with the locating lever junction, is equipped with the intercommunicating pore with through-hole and slide intercommunication in the locating lever.

Has the advantages that: at the in-process of leading-in gas to the guiding flow intracavity, gaseous entering slide to extrude the stopper gradually, make the stopper slide to keeping off the ring direction, and extrude the locating lever gradually, make the locating lever roll-off water conservancy diversion intracavity, extrude the sucking disc again to offset with the top of cavity, make the air discharge at sucking disc and cavity top. After the limiting block abuts against the baffle ring, the limiting block seals a flow channel in the positioning rod, so that negative pressure on the sucker is completed, the sucker is fixed, the limiting on the positioning rod, the sliding rod and the support is further completed, the probability of movement of the support in the use process is reduced, and the influence on the regularity of the shape of the circle formed by the foam stabilizing roller and the probability of deviation of the circle center are reduced.

When the position adjustment of support is carried out to needs, no longer to the leading-in gas of water conservancy diversion intracavity, the extrusion force that the stopper received this moment is hour, therefore the stopper resets under the effect of spring, consequently makes the intercommunicating pore in the locating lever and the slide intercommunication in the slide bar to make in gaseous passing through the intercommunicating pore gets into the sucking disc, make sucking disc and cavity top break away from, the locating lever also moves down under the action of gravity, makes things convenient for the removal of slide bar and support.

Drawings

FIG. 1 is a partial cross-sectional view of a five-layer co-extrusion blown film machine of the present invention;

FIG. 2 is a longitudinal cross-sectional view of the extrusion apparatus of FIG. 1;

FIG. 3 is a top view of the bubble stabilizer of FIG. 1;

FIG. 4 is a longitudinal cross-sectional view of a separator roll according to the present invention;

fig. 5 is a partial sectional view of the holder of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a machine barrel 1, a hopper 2, an extrusion shaft 3, a spiral guide piece 4, a high-temperature-resistant film 5, a mixing lug 6, a driving cavity 7, an auxiliary heat channel 8, a mounting block 9, a heat pipe 10, a first driving rod 11, a flow guide channel 12, a rotating blade 13, a delivery pipe 14, a cam 15, a push rod 16, an arc-shaped block 17, an anti-drop block 18, a mandrel 19, an annular flow channel 20, an auxiliary heat flow channel 21, a cooling flow channel 22, a delivery channel 23, a summary flow channel 24, a distribution disc 25, an annular flow channel 26, a sealing ring 27, a mounting ring 28, a forming flow channel 29, a heating pipe 30, a cooling pipe 31, a pressure increasing plate 32, a stirring shaft 33, a stirring blade 34, a high-pressure pipe 35, a fixing frame 36, a cavity 37, a bracket 38, a flow guide cavity 39, a distribution roller 40, a gas storage cavity 41, a delivery hole 42, a rotating sleeve 43, a gas outlet hole 44, a sliding rod 45, a sliding rail 46, a limiting block 47, a retaining ring 48, a positioning rod 49, a communicating hole 50, a heat exchange plate, a heat exchange, The suction cup 51, the communication pipe 52, the transmission rod 53, the linkage rod 54, the second driving rod 55, the rotating shaft 56, the screw rod 57 and the slider 58.

Example 1:

a five-layer co-extrusion film blow molding machine is basically shown in figure 1 and comprises an extrusion device, a machine head and a foam stabilizer. The extruding device is provided with five extruding devices, each extruding device comprises a base and a machine barrel 1 mounting frame arranged on the base, the machine barrel 1 is fixed on the machine barrel 1 mounting frame, and a heating coil is wound on the side wall of the machine barrel 1 and used for heating and melting materials. The left end of the machine barrel 1 is an extrusion end, the left end of the machine barrel 1 is provided with an opening, and when the die head is used, the die head is arranged at the left end of the machine barrel 1 and is used for realizing the molding of a thin film; the right end of the machine barrel 1 is a driving end, and the right end of the machine barrel 1 is closed. The top of the right part of the machine barrel 1 is also provided with a feeding hole, the feeding hole is provided with a hopper 2, and the hopper 2 is communicated with the machine barrel 1.

An extrusion shaft 3 is coaxially arranged in the machine barrel 1, the right end of the extrusion shaft 3 penetrates through the right end of the machine barrel 1 and extends out of the machine barrel 1, and the extrusion shaft 3 is rotatably connected with the machine barrel 1. The part of the extrusion shaft 3 in the machine barrel 1 comprises a plurality of extrusion sections and mixing sections which are arranged in a crossed manner, and the number of the extrusion sections is one more than that of the mixing sections; the extrusion shaft 3 is an extrusion section near the hopper 2 and at the extrusion end. The quantity of extruding the section and mixing the section sets up according to actual demand, is provided with three section and two mixing sections of extruding in this embodiment, extrudes and is provided with spiral guide piece 4 on the section, and the outer parcel of mixing section has high temperature resistant membrane 5, is provided with polylith mixing convex block 6 on the high temperature resistant membrane 5, and the high temperature resistant membrane 5 that uses in this embodiment is the PDMS membrane. The main chain of the PDMS membrane is a silicon-oxygen-silicon molecular structure, has the characteristics of temperature resistance, elasticity, biocompatibility, air permeability and the like, has good stretching and rebounding effects, and can realize good deformation.

Combine fig. 2 to show, extrude coaxial drive chamber 7 that is provided with in the axle 3, extrude and lie in drive chamber 7 outside evenly distributed in the axle 3 and have many to assist hot aisle 8, assist hot aisle 8's quantity to set up according to the actual demand, be provided with 9 in this embodiment, assist hot aisle 8's right-hand member and outside intercommunication, extrude and be equipped with in the axle 3 and assist the through-hole of hot aisle 8 left ends and drive chamber 7 intercommunication. The right-hand member of 1 mounting bracket of barrel is fixed with installation piece 9, and installation piece 9 rotates with the right-hand member of extruding axle 3 to be connected, and the left end of installation piece 9 is equipped with cavity 37 (not drawn in the picture), and the right-hand member of assisting hot aisle 8 all communicates with cavity 37, is fixed with a heat pipe 10 with cavity 37 intercommunication on the installation piece 9.

Still include the driving piece that drives high temperature resistant membrane 5 and remove, the driving piece is including running through the right-hand member of installation piece 9 and extrusion shaft 3 and extending to the first actuating lever 11 in the drive chamber 7, is provided with two cams 15 on the first actuating lever 11, and two cams 15 are located two mixing section departments respectively. The driving piece further comprises a plurality of push rods 16 which penetrate through the side wall of the extrusion shaft 3 and are in sliding connection with the extrusion shaft 3, push rods 16 are arranged at two mixing section positions, three push rods 16 are arranged at each mixing section position, and the push rods 16 are uniformly distributed on the extrusion shaft 3.

An arc block 17 is arranged at one end of the push rod 16 between the outside of the extrusion shaft 3 and the high temperature resistant film 5, and the inner arc surface of the arc block 17 faces the extrusion shaft 3. The outer wall of the extrusion shaft 3 is provided with a mounting groove matched with the arc-shaped block 17, namely, the arc-shaped block 17 is clamped into the mounting groove. An anti-drop block 18 is fixed on one end of the push rod 16 positioned in the extrusion shaft 3, and the anti-drop block 18 is attached to the circular part of the cam 15.

A flow guide channel 12 communicated with the driving cavity 7 is arranged in the first driving rod 11, a delivery pipe 14 is rotatably connected to the right end of the first driving rod 11, and the delivery pipe 14 and the first driving rod 11 are coaxially arranged. The right end of the first driving lever 11 is provided with a rotating blade 13, and the air outlet end of the delivery pipe 14 is opposite to the rotating blade 13, so that the first driving lever 11 can rotate, and the rotating direction is opposite to the rotating direction of the extrusion shaft 3.

A motor mounting seat is further fixed on the base and positioned on the right side of the machine barrel 1, and a motor for driving the extrusion shaft 3 to rotate is fixed on the motor mounting seat. The output shaft of the motor is connected with a speed reducer, the speed reducer comprises a driving gear coaxially fixed on the output shaft of the motor and a reduction gear coaxially arranged on the extrusion shaft 3, and the reduction gear is positioned between the right end of the machine barrel 1 and the mounting block 9; the reduction gear is meshed with the driving gear, and the transmission ratio of the driving gear to the reduction gear is set according to actual requirements. In the embodiment, the transmission ratio of the driving gear and the reduction gear is 15:1, namely, the motor rotates 15 circles, and the reduction gear rotates 1 circle.

The machine head comprises a mandrel 19 and a distribution disc 25 overlapped outside the mandrel 19, an annular gap is arranged on the outer side of the upper part of the mandrel 19, therefore, a mounting platform is arranged on the mandrel 19, the distribution disc 25 at the bottom is fixed on the mounting platform through bolts, and a sealing ring 27 is arranged between the distribution disc 25 and the mounting platform. A mounting ring 28 is bolted to the top distribution disk 25, and a sealing ring 27 is also provided between the mounting ring 28 and the top distribution disk 25. A molding runner 29 is formed between the mounting ring 28 and the top of the notch, and the thickness of the molding runner 29 is reduced from bottom to top.

The distribution disk 25 is further provided with an annular flow passage 26, the annular flow passage 26 is arranged to be inclined downwards from outside to inside, and the inclination angle of the annular flow passage 26 is 20-30 degrees, and 20 degrees is preferred in the embodiment. On the outer side of each distribution disk 25 there is a material inlet which communicates with an annular flow channel 26.

Be equipped with annular runner 24 that gathers in dabber 19, gather runner 24's thickness from the bottom up and increase in proper order, gather runner 24 and include the toper section of downside and the cylinder section of upside. Between the inner side of the distribution disk 25 and the gap there is formed a cylindrical section communicating with the molding flow channel 29, and the inner sides of the annular flow channels 26 are both communicating with the cylindrical section.

The mandrel 19 is also internally provided with a plurality of circular runners 20 which are communicated with the conical section from inside to outside in sequence, and the sum of the number of the circular runners 20 and the number of the circular runners 26 is five. The number of the annular flow channels 20 may be set to 3, the number of the annular flow channels 26 may be set to 2, or the number of the annular flow channels 20 may be set to 2, and the number of the annular flow channels 26 may be set to 3, in this embodiment, it is preferable that the number of the annular flow channels 20 is 3, and the number of the annular flow channels 26 is 2, that is, two distribution disks 25 are provided. The bottom of the mandrel 19 is also provided with three material inlets which are respectively communicated with the three circular flow channels 20. The extrusion ends of the machine barrel 1 of the five extrusion devices are respectively communicated with the five material inlets.

An auxiliary heat flow passage 21 is arranged on the inner side of the conical section in the mandrel 19, the auxiliary heat flow passage 21 is spirally arranged, and the bottom end of the auxiliary heat flow passage 21 is communicated with a heating pipe 30. The mandrel 19 is also internally provided with a guide-out channel 23, the auxiliary heat flow channel 21 is wrapped outside the guide-out channel 23, and the top end of the auxiliary heat flow channel 21 is communicated with the guide-out channel 23. A cooling flow channel 22 is further arranged on the inner side of the forming flow channel 29 in the mandrel 19, the cooling flow channel 22 is also spirally arranged, the top end of the cooling flow channel 22 is communicated with a cooling pipe 31, and the cooling pipe 31 penetrates through the mandrel 19 and extends out of the bottom of the mandrel 19; the bottom end of the cooling flow passage 22 communicates with the derivation passage 23.

The pressure increasing plate 32 is vertically and slidably connected in the guide-out channel 23, a spring is welded at the bottom of the pressure increasing plate 32, and the bottom end of the spring is welded at the bottom end of the guide-out channel 23. The top of the pressure increasing plate 32 is also rotatably connected with a stirring shaft 33, the stirring shaft 33 is provided with stirring blades 34, and the communication part of the cooling channel 22 and the outlet channel 23 and the communication part of the auxiliary heat channel 21 and the outlet channel 23 are both opposite to the stirring blades 34, so that when gas is introduced into the outlet channel 23, the gas impacts the stirring blades 34 to realize the rotation of the stirring blades 34. The top of the guiding channel 23 is communicated with a high-pressure pipe 35, the high-pressure pipe 35 penetrates through the top of the mandrel 19, and the stirring shaft 33 can be inserted into the high-pressure pipe 35.

The bubble stabilizer is located the top of aircraft nose, and the bubble stabilizer includes annular mount 36, combines shown in fig. 3, and the inboard of mount 36 evenly is provided with many spinal branchs support 38 along circumference, and the quantity of support 38 is selected according to actual demand, is provided with 6 spinal branchs support 38 in this embodiment. A plurality of foam stabilizing rollers are arranged on the inner side of the bracket 38 along the height direction of the fixing frame 36, so that the foam stabilizing rollers of each layer are arranged in a circle along the plane and are concentric with the fixing frame 36; the air outlet end of the high-pressure pipe 35 on the machine head is positioned in a circle formed by the bubble stabilizing roller, and can provide high-pressure air for the blowing of the bubble.

The foam stabilizing rollers comprise two sub-rollers 40, the two sub-rollers 40 are hinged on the support 38, as shown in the combined figure 4, a rotating sleeve 43 is rotatably connected outside the sub-rollers 40, and a plurality of rows of air outlet holes 44 are arranged on the rotating sleeve 43 along the circumferential direction. Be equipped with gas storage chamber 41 in minute roller 40, divide roller 40 to be close to the one side upper portion in the middle part of mount 36 and be equipped with one row of export 42 with gas storage chamber 41 intercommunication, and gas export 42 inclines upward from inside to outside and sets up, can make the gas of following gas storage chamber 41 derivation, has the trend of upflow. The number of the air-guide holes 42 corresponds to the number of air-guide holes 44 per discharge hole, and the air-guide holes 42 may be aligned one by one per discharge hole 44.

Referring to fig. 5, a diversion cavity 39 is provided in the bracket 38, a cold air pipe communicated with the diversion cavity 39 is provided on the bracket 38, and a plurality of connecting pipes for communicating the diversion cavity 39 with an air storage cavity 41 in the branch roller 40 are also provided on the bracket 38. A sliding rod 45 is further fixed on one side of the support 38 close to the inner wall of the fixed frame 36, a slide way 46 communicated with the flow guide cavity 39 is arranged in the sliding rod 45, a limiting block 47 is connected in the slide way 46 in a transverse sliding mode, a blocking ring 48 is fixed on the left side of the limiting block 47 in the slide way 46, a spring is welded on the left side of the limiting block 47, and the left end of the spring penetrates through the blocking ring 48 and is welded at the left end of the slide way 46. The spring chooses the pressure spring for use in this embodiment, and specific parameter sets up according to actual demand.

An annular cavity 37 is arranged in the fixed frame 36, the sliding rod 45 penetrates through the inner wall of the fixed frame 36 and extends into the cavity 37, and the sliding rod 45 can be connected with the fixed frame 36 in a sliding mode along the radial direction; the slide rod 45 is provided with a baffle ring 48 which is positioned in the cavity 37. A slide hole is further formed in the top of the slide rod 45 and located between the limiting block 47 and the blocking ring 48, the slide hole can be sealed through the limiting block 47, and a positioning rod 49 is vertically connected in the slide hole in a sliding mode. The bottom of the positioning rod 49 is wedge-shaped or hemispherical, and in this embodiment, the bottom of the positioning rod 49 is hemispherical. A communicating hole 50 with both ends communicated with the outside is further arranged in the positioning rod 49, a sucking disc 51 is fixed at the top end of the positioning rod 49, and a through hole communicated with the communicating hole 50 is arranged on the sucking disc 51. To ensure the sealing property, the positioning rod 49 may be externally covered with the seal ring 27.

The inner wall of the fixing frame 36 is further fixed with a plurality of linkage members, two sides of each support 38 are provided with two linkage members, each linkage member is a Z-shaped communicating pipe 52, each communicating pipe 52 comprises two transverse pipes and a vertical pipe, two ends of each vertical pipe are respectively communicated with the two transverse pipes, and the communicating pipes 52 are inverted. The two cross pipes respectively comprise a cross pipe with an opening facing the bracket 38 and a second cross pipe with an opening facing the outer side of the fixed frame 36, and the second cross pipe penetrates through the inner side of the fixed frame 36, so that the communication pipe 52 is fixed on the fixed frame 36; the internal diameter of the first horizontal pipe is smaller than that of the second horizontal pipe, and the specific internal diameters of the first horizontal pipe and the second horizontal pipe are set according to actual requirements.

All sliding connection has the piston in first violently pipe and the second violently pipe, is located to annotate between two pistons in the communicating pipe 52 and has the liquid of communicating, and the liquid of communicating uses oil in this embodiment. A transmission rod 53 is hinged on the piston in the first transverse pipe, a linkage rod 54 is hinged on one end of the transmission rod 53, which is far away from the piston, and the free ends (the ends far away from the support 38) of the branch rollers 40 on the same side on the support 38 are fixed on the linkage rod 54. A second driving rod 55 which penetrates through the vertical pipe and is in sliding connection with the vertical pipe is fixed on the piston in the second transverse pipe, and one end, far away from the piston, of the second driving rod 55 is fixed on the support 38.

The novel rotary table further comprises a driving piece for driving the sliding rod 45 to slide along the fixed frame 36 in the radial direction, the number of the rotating shafts 56 and the number of the lead screws of the driving piece are the same as that of the supports 38, the rotating shafts 56 penetrate through the top of the fixed frame 36 and extend into the cavity 37, the rotating shafts 56 are rotatably connected with the fixed frame 36, adjacent rotating shafts 56 are driven by belts, specifically, rotating wheels are coaxially arranged on the rotating shafts 56, the belts are sleeved on the rotating wheels on the adjacent rotating shafts 56, and therefore the rotating shafts 56 can rotate synchronously and in the same direction.

The lead screw comprises a lead screw 57 rotatably connected in the cavity 37 and a sliding block 58 in threaded connection with the lead screw 57, one end of the sliding rod 45, which is positioned in the cavity 37, is fixed on the sliding block 58, and the sliding rod 45 is a rectangular rod, so that the sliding block 58 can be prevented from rotating, and the sliding block 58 can axially move along the lead screw 57 when the lead screw 57 rotates. The screw rod 57 and the rotating shaft 56 are driven by a bevel gear set, specifically, a driving bevel gear is coaxially fixed at the bottom end of the rotating shaft 56, and a driven bevel gear meshed with the driving bevel gear is coaxially fixed on the screw rod 57.

The fixed mount 36 is further fixed with a motor, an output shaft of the motor is fixed with a driving gear, and one of the rotating shafts 56 is coaxially fixed with a rotating gear engaged with the driving gear, so that the rotating shafts 56 can be driven. The motor is a forward and reverse rotation motor, so that forward transmission and reverse rotation of the rotating shaft 56 can be realized, forward operation and reverse operation of the driving screw rod can be realized, and the sliding block 58 can reciprocate along the axial direction of the screw rod.

The extrusion device further comprises a mounting seat, and the machine head, the fixing frame 36 and the base of the extrusion device are all fixed on the mounting seat.

The specific implementation process is as follows:

step one, melting and extruding raw materials:

and respectively feeding the raw material particles into the machine barrel 1 through the hoppers 2 of the five extrusion devices, starting the heating coils at the same time, and heating the machine barrel 1 through the heating coils to heat and melt the raw material particles to form a molten material. And the driving gear is driven to rotate by the motor, and the driving gear drives the reduction gear to rotate, so that the extrusion shaft 3 rotates.

When extrusion shaft 3 rotated, can make spiral guide piece 4 propelling movement material forward (left) to accomplish the mixture of material, after the material was pushed to mixing section, mixing section department did not set up the spiral guide piece 4 that carries out the propelling movement to the material, therefore the material can temporarily stop at mixing section, and extrude the propelling movement forward through the material of extruding section propelling movement. When the materials stay in the mixing section, the extrusion shaft 3 continuously rotates, so that the mixing lug 6 can be driven to rotate, and the materials are uniformly mixed.

At the same time, hot air is introduced into the cavity 37 in the mounting block 9 through the heat transfer pipe 10, flows along the auxiliary heat path 8 communicating with the cavity 37, enters the drive chamber 7, and accumulates in the drive chamber 7. Hot gas gets into in assisting hot aisle 8 and the drive chamber 7, can heat extrusion shaft 3 to the realization heats the material, improves the heating and the fused effect to the material, and then makes things convenient for the homogeneous mixing of material more.

After a certain amount of hot gas has accumulated in the drive chamber 7, it flows through the flow guide channel 12 in the first drive shaft 11 and is discharged through the discharge line 14. The gas discharged through the discharge line 14 strikes the rotor blade 13, so that the rotor blade 13 rotates the first drive rod 11 in the opposite direction to the extrusion shaft 3. The rotation of the first driving rod 11 and the extrusion shaft 3 can enable the convex part of the cam 15 to intermittently extrude the push rod 16, so that the push rod 16 drives the high temperature resistant film 5 to deform, and when the convex part of the cam 15 slides over the push rod 16, the high temperature resistant film 5 at the position can reset under the extrusion action of materials. The high-temperature-resistant film 5 drives the mixing lug 6 to reciprocate and the extrusion shaft 3 is matched with the mixing lug 6 to drive the mixing lug 6 to rotate, so that the materials can be uniformly mixed.

The material is in the in-process of advancing, mixes through two mixing sections, improves the mixing degree of mixing, and the helical blade on the section of extruding of rethread left end extrudes.

Step two, bubble forming:

the molten materials extruded by the extruding device enter the circular flow channel 20 and the annular flow channel 26 through the material inlets and enter the collecting flow channel 24 along the circular flow channel 20 and the annular flow channel 26, and the materials are sequentially arranged according to the circular flow channel 20 from inside to outside → the annular flow channel 26 from bottom to top. And by continuing to add material, the material continues to move upward under pressure and into the forming runner 29 to form a bubble. Because the thickness of the molding runner 29 is reduced from bottom to top in sequence, the extrusion molding of the material can be completed, so that a film bubble is formed, and the film bubble is pulled upwards, so that the film bubble is positioned in a circular ring formed by a bubble stabilizing roller in the bubble stabilizer.

While the material is being fed, hot gas is fed into the auxiliary heat flow path 21 through the heating pipe 30, and cold gas is fed into the cooling flow path 22 through the cooling pipe 31. Hot gas can flow along the auxiliary heat flow channel 21 to keep the temperature of the inner side of the conical section higher, reduce the probability of material plasticization and facilitate the continuous upward flow of the material. The cold air flows along the cooling runner 22, and the temperature of the mandrel 19 at the inner side of the forming runner 29 can be lower, so that the film bubble can be formed by plasticizing.

As the hot gas and the cold gas flow, the hot gas passes through the top end of the auxiliary heat flow passage 21, and the cold gas passes through the bottom end of the cooling flow passage 22 into the outlet passage 23. All can assault stirring vane 34 after cold air and steam get into derivation passageway 23 for (mixing) shaft 33 and stirring vane 34 rotate, and then realize the mixture of cold air and steam, reduce gaseous temperature.

Along with the increase of the gas accumulation in the discharge passage 23, the pressure in the discharge passage 23 increases, and further the pressure increasing plate 32 is extruded, and the pressure increasing plate 32 drives the stirring shaft 33 to move downwards, so that the discharge pipe 14 is communicated with the discharge passage 23, and the gas in the discharge passage 23 is discharged through the high-pressure pipe 35. Because the guiding channel 23 is in a high-pressure state, the gas discharged from the high-pressure pipe 35 is in a high-speed and high-pressure state, and the high-pressure gas enters the circular formed by the bubble stabilizing roller to provide high-pressure gas for the inflation of the bubble.

Thirdly, forming a film:

when the bubble gets into in the foam stabilizer, high-pressure pipe 35 lets in high-pressure gas to the bubble inside, rethread cold air pipe lets in air conditioning to the water conservancy diversion chamber 39 in the support 38, air conditioning can be full of water conservancy diversion chamber 39 gradually and flow respectively to slide 46 and gas storage chamber 41 in, air conditioning extrudes stopper 47 gradually simultaneously, makes stopper 47 slide gradually towards being close to and keeping off 48 directions of ring, and extrudees locating lever 49, makes locating lever 49 upwards slide, supports the top at cavity 37 with sucking disc 51 tightly. When the limiting block 47 slides to seal the slide hole, the flow channel is sealed, so that negative pressure to the suction disc 51 is completed, the slide rod 45 is stably fixed on the fixing frame 36, the slide rod 45 and the support 38 can be prevented from moving, the circle center, the diameter or the shape of a circle formed by the bubble stabilizing roller is prevented from changing, and the drawing and the forming of the bubble are facilitated.

At the towed in-process of membrane bubble, the membrane bubble can take place relative friction with rotating sleeve 43, and then drives and rotate sleeve 43 and rotate for the venthole 44 on the rotating sleeve 43 gradually with divide the air guide hole 42 intercommunication on the roller 40, and the direction of gas circulation is ascending, and then can accomplish the cooling shaping to the film. And the formed film is rolled by using a rolling device.

In the using process, when the inner diameter of the bubble stabilizer needs to be adjusted, taking the case of reducing the inner diameter, the motor drives the rotating shaft 56 to rotate in the forward direction, the lead screw runs through the transmission of the belt and the bevel gear set, so that the sliding block 58 moves in the direction close to the center of the circle of the fixed frame 36, and the sliding rod 45 drives the bracket 38 to move in the direction close to the center of the circle of the fixed frame 36.

At this time, the bracket 38 drives the second driving rod 55 to move, so that the second driving rod 55 in the second transverse pipe moves along with the bracket 38, and thus the piston slides, and the other piston also drives the driving rod 53 to move towards the direction close to the center of the fixed frame 361 by the driving of the communication liquid. Because the internal diameter of the second horizontal pipe is greater than that of the first horizontal pipe, the moving distance of the piston in the first horizontal pipe is greater than that in the second piston, so that the free end of the sub-roller 40 moves towards the circle center of the fixing frame 36, the angle of each bubble stabilizing roller is adjusted, the circle formed by each bubble stabilizing roller is ensured to be more regular, and the film bubble is conveniently pulled.

The free ends of the branch rollers 40 on the same side of each bracket 38 are fixed on the same following linkage rod 54, so that the angles of the branch rollers 40 on the same side can be synchronously adjusted when the branch rollers 40 are adjusted.

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and these changes and modifications should not be construed as affecting the performance of the invention and its practical application.

Claims

1. A five-layer co-extrusion film blow molding machine comprises a machine head, a bubble stabilizer and an extrusion device for extruding materials into the machine head, wherein the extrusion device comprises a machine barrel, the machine barrel comprises an open extrusion end and a closed driving end, an extrusion shaft penetrating through the driving end is coaxially fixed in the machine barrel, the machine barrel further comprises a motor for driving the extrusion shaft to rotate, the top of one end, close to the motor, of the machine barrel is also communicated with a hopper, and a heating coil is wound on the side wall of the machine barrel; the machine head comprises a mandrel and a plurality of distribution discs which are overlapped outside the mandrel, a collecting flow channel is formed between the distribution discs and the mandrel, annular flow channels communicated with the collecting flow channel are arranged on the distribution discs, and a material inlet respectively communicated with each annular flow channel is arranged outside each distribution disc; the method is characterized in that: the extrusion shaft comprises a plurality of extrusion sections and mixing sections which are arranged in a crossed mode, the extrusion sections are arranged at the positions, close to the driving end and the extrusion end, of the extrusion shaft, and spiral guide pieces are arranged outside the extrusion sections; the mixing section is wrapped by a high-temperature resistant film, and a plurality of mixing lugs are arranged on the high-temperature resistant film; the device also comprises a driving piece for driving the high-temperature-resistant film to reciprocate along the radial direction of the mixing section; the mandrel is also internally provided with circular runners which are sequentially arranged from inside to outside, the circular runners are communicated with the gathering runner, and the bottom of the mandrel is also provided with a plurality of material inlets which are respectively communicated with the circular runners; the sum of the number of the circular flow channels and the number of the distribution discs is five; raw material particles are heated and melted in a machine barrel through a heating coil, and are rotated through an extrusion shaft to drive helical blades on an extrusion section to advance; after the raw materials enter the mixing section, the mixing lug is driven to rotate by the rotation of the extrusion shaft, and then the raw materials are mixed; meanwhile, under the action of the driving piece, the high-temperature-resistant film moves in a reciprocating manner, so that the position change of the mixing lug can be realized, and the mixing uniformity is improved; a driving cavity is coaxially arranged in the extrusion shaft, the driving part comprises a plurality of push rods penetrating through the side wall of the extrusion shaft, a push rod is arranged at each mixing section, one end of each push rod is in contact with the inner side of the high-temperature-resistant film, and the other end of each push rod is positioned in the driving cavity; the driving piece further comprises a first driving rod penetrating through one end, located outside the barrel, of the extrusion shaft, the first driving rod extends into the driving cavity, a plurality of cams used for driving the push rod to move in a reciprocating mode are arranged on the portion, located in the driving cavity, of the first driving rod, the number of the cams is consistent with the number of the mixing sections, and each mixing section is provided with a cam.

2. The five-layer coextrusion blown film machine according to claim 1, wherein: a plurality of auxiliary heat channels wrapped outside the driving cavity are uniformly distributed in the extrusion shaft, and the extrusion shaft also comprises a heat conduction pipe for leading a heat source into the auxiliary heat channels; a plurality of through holes which respectively communicate the auxiliary heat channels with the driving cavity are arranged in the extrusion shaft; the first driving rod is provided with a flow guide channel communicated with the driving cavity.

3. The five-layer coextrusion blown film machine according to claim 2, wherein: the end of the extrusion shaft, which is positioned outside the machine barrel, is rotatably connected with an installation block, the installation block is provided with a cavity communicated with a plurality of auxiliary heat channels, and the heat conduction pipe penetrates through the installation block and is communicated with the cavity; the first driving rod penetrates through the mounting block.

4. The five-layer co-extrusion film blow molding machine according to claim 3, characterized in that: the first driving rod is rotatably connected with the mounting block, and the rotating direction of the first driving rod is opposite to that of the extrusion shaft; one end of the first driving rod, which is positioned outside the mounting block, is fixed with a rotating blade, the first driving rod is rotatably connected with a delivery pipe communicated with the flow guide channel, and the air outlet end of the delivery pipe positively rotates the rotating blade.

5. The five-layer co-extrusion film blow molding machine according to claim 4, characterized in that: the foam stabilizer comprises an annular fixing frame, a plurality of supports are arranged on the inner ring of the fixing frame along the circumferential direction, a plurality of foam stabilizing rollers are arranged on each support, each layer of foam stabilizing rollers are arranged in a circle, the foam stabilizer also comprises a driving piece for driving the supports to move, the driving piece comprises a plurality of rotating shafts, a plurality of groups of lead screws and a motor for driving one of the rotating shafts to rotate, the number of the rotating shafts and the number of the lead screws are consistent with that of the supports, and the adjacent rotating shafts are driven by a belt; an annular cavity is arranged in the fixed frame, and the rotating shafts vertically penetrate through the top of the fixed frame and extend into the cavity; the screw rod of the screw rod is vertical to the rotating shaft, and the screw rod of the screw rod is transmitted with the rotating shaft through the bevel gear set; a sliding rod which penetrates through the inner side of the fixing frame and extends into the cavity is fixed on the support, the sliding rod slides along the radial direction of the fixing frame, and one end, located in the cavity, of the sliding rod is fixed on a sliding block of the lead screw.

6. The five-layer co-extrusion film blow molding machine according to claim 5, characterized in that: each bubble stabilizing roller comprises two horizontally arranged branch rollers, and the branch rollers are hinged on the support.

7. The five-layer coextruded film blow molding machine of claim 6 wherein: the two sides of each support are respectively provided with a linkage part, each linkage part is a Z-shaped communicating pipe, each communicating pipe comprises two transverse pipes with different openings facing towards each other and a vertical pipe, the two transverse pipes are parallel to the sliding rod, one transverse pipe penetrates through the inner side of the fixing frame and extends into the cavity, and the vertical pipe is perpendicular to the sliding rod; pistons are connected in the two transverse pipes in a sliding manner, communicating liquid is injected between the two pistons in the communicating pipes, a second driving rod is fixed on one piston, and one end, far away from the piston, of the second driving rod is fixed on the bracket; a transmission rod is hinged on the other piston, a linkage rod is hinged at one end of the transmission rod, which is far away from the piston, and one ends of the branch rollers in the same row, which are far away from the bracket, are fixed on the linkage rod; the inner diameter of the transverse pipe provided with the linkage rod is smaller than that of the transverse pipe provided with the second driving rod.

8. The five-layer co-extrusion film blow molding machine according to claim 7, characterized in that: the outer part of the sub-roller is rotatably connected with a rotating sleeve; the upper part of one side of the branch roller close to the middle part of the fixing frame is provided with a row of air guide holes communicated with the air storage cavity; a plurality of rows of air outlet holes which can be communicated with the air guide holes are arranged on the periphery of the rotating sleeve; the bracket is internally provided with a flow guide cavity and also comprises a cold air pipe communicated with the flow guide cavity and a connecting pipe for communicating the air storage cavity with the flow guide cavity.

9. The five-layer co-extrusion film blow molding machine according to claim 8, characterized in that: a slide way communicated with the flow guide cavity is arranged in the slide rod, a limiting block is connected in the slide way in a sliding manner, a retaining ring is fixed on one side, away from the support, of the limiting block in the slide way, and a spring is arranged between the limiting block and the slide way; still include one and run through slide bar top lateral wall and extend to slide in the locating lever, the locating lever is located the outer one of slide and serves and be equipped with the sucking disc, and the sucking disc is equipped with the through-hole with the locating lever junction, is equipped with the runner with through-hole and slide intercommunication in the locating lever.