阅读说明：本技术 多层共挤吹膜机模头 (Die head of multilayer co-extrusion film blowing machine ) 是由 毛泽利 毛昭洪 于 2020-12-30 设计创作，主要内容包括：本发明属于挤出喷嘴或模口技术领域,公开了一种多层共挤吹膜机模头,包括模头主体,模头主体上从内至外依次设置有多条圆环流道,模头主体的顶部设有与多条圆环流道均连通的汇总流道,模头主体的底部设有多个分别与多条圆环流道连通的物料进口,模头主体的上部外侧依次重叠设置有多个配料盘片,配料盘片内均设置有与汇总流道连通的环形流道,配料盘片的外侧也设有与环形流道连通的物料进口。本发明解决了现有技术中随着生产的复合薄膜的层数增加,会导致模头的尺寸增大较多,因此成本高的问题。(The invention belongs to the technical field of extrusion nozzles or die orifices, and discloses a multi-layer co-extrusion film blowing machine die head which comprises a die head main body, wherein a plurality of circular runners are sequentially arranged on the die head main body from inside to outside, a gathering runner communicated with the circular runners is arranged at the top of the die head main body, a plurality of material inlets communicated with the circular runners respectively are arranged at the bottom of the die head main body, a plurality of batching discs are sequentially overlapped on the outer side of the upper part of the die head main body, annular runners communicated with the gathering runner are arranged in the batching discs, and material inlets communicated with the annular runners are also arranged on the outer sides of the batching discs. The invention solves the problem that the size of the die head is increased more along with the increase of the number of layers of the produced composite film in the prior art, so that the cost is high.)

1. Multilayer is inflation film manufacturing machine die head altogether, including the die head main part, from interior to having set gradually many ring runners outward in the die head main part, the top of die head main part is equipped with the runner that gathers that all communicates with many ring runners, the bottom of die head main part be equipped with a plurality of respectively with the material import of many ring runners intercommunication, its characterized in that: a plurality of material distribution discs are sequentially arranged on the outer side of the upper part of the die head main body in an overlapping mode, annular flow channels communicated with the collecting flow channels are arranged in the material distribution discs, and material inlets communicated with the annular flow channels are also arranged on the outer sides of the material distribution discs.

2. The multi-layer co-extrusion film blowing machine die head according to claim 1, characterized in that: the collecting flow channel comprises a conical section at the lower side and a cylindrical section at the upper side, the large-diameter end of the conical section is communicated with the cylindrical section, the circular flow channel is communicated with the conical section, and the circular flow channel is communicated with the cylindrical section.

3. The multi-layer co-extrusion film blowing machine die head according to claim 2, characterized in that: the upper part of the die head main body is provided with an annular gap, the top of the batching disc is also fixed with a forming ring, and the gap and an annular channel between the batching disc and the forming ring form a cylindrical section.

4. The multi-layer co-extrusion film blowing machine die head according to claim 3, characterized in that: and sealing rings are arranged between the material mixing disk sheet at the bottom and the die head main body and between the material mixing disk sheet at the top and the forming ring.

5. The multi-layer co-extrusion film blowing machine die head according to claim 4, characterized in that: the cylinder section comprises a feeding section and a forming section, wherein the feeding section is positioned on the inner side of the material distribution disk, the forming section is positioned on the inner side of the forming ring, and the thickness of the forming section is gradually reduced from bottom to top.

6. The multi-layer co-extrusion film blowing machine die head according to claim 5, characterized in that: the thicknesses of the conical section and the feeding section are sequentially increased from bottom to top.

7. The multi-layer co-extrusion film blowing machine die head according to claim 6, characterized in that: the annular flow passage is arranged from outside to inside in a downward inclined mode.

8. The multi-layer co-extrusion film blowing machine die head according to claim 7, characterized in that: the middle part of the die head main body is spirally provided with an auxiliary heat flow passage, the top of the auxiliary heat flow passage is communicated with an air inlet pipe, and the middle part of the die head main body is also provided with an air storage channel communicated with the bottom of the auxiliary heat flow passage.

9. The multi-layer co-extrusion film blowing machine die head according to claim 8, characterized in that: the die head main body is provided with a cooling flow channel at the inner side of the forming ring, the cooling flow channel is spirally arranged, the top of the cooling flow channel is communicated with a cold air pipe, and the bottom of the cooling flow channel is communicated with a delivery pipe.

10. The multi-layer co-extrusion film blowing machine die head according to claim 9, characterized in that: the vortex tube is communicated with the cold air tube and the air inlet tube respectively.

Technical Field

The invention belongs to the technical field of extrusion nozzles or die orifices, and particularly relates to a die head of a multilayer co-extrusion film blowing machine.

Background

The composite film is a multilayer film with a better use effect, is usually an odd number of layers and comprises a framework layer and a functional layer, wherein the framework layer is usually positioned in the middle layer and is made of cheap materials; the functional layer is usually located inside and outside the skeleton layer and used for wrapping the skeleton layer, and the functional layer is usually made of a material with one special function of sealing or damping, friction, shielding, flame retardance, heat prevention, sound absorption, heat insulation, adhesion and the like, and the material is expensive. The composite film co-extruded by using various different materials has higher use effect and lower cost, thereby being widely used.

A multilayer co-extrusion film blowing machine is a common device for preparing composite films, a plurality of extruders are used for contacting different material melts, the different material melts are extruded together after die heads are assembled to form a circular bubble with multiple layers of materials, compressed gas is wrapped in the bubble so as to form inflation, and the bubble is rolled after inflation and cooling to form the composite film.

The existing multilayer co-extrusion film blowing machine die head mainly comprises two types, one type is a plane superposition type multilayer co-extrusion film blowing machine die head, and the other type is a concentric sleeve type multilayer co-extrusion film blowing die head.

The utility model provides a plane stack formula multilayer is crowded inflation film manufacturing machine die head altogether, generally include core bucket and a plurality of stack at the distribution disc in the core bucket outside, form between core bucket and the distribution disc and gather the runner, all be equipped with on the distribution disc with gather runner intercommunication annular runner, the periphery of distribution disc still is equipped with the material import. During the use through the material import to the annular flow channel of distributing disk piece in add the material, the material flows along annular flow channel, gets into gradually in the runner that gathers to the material of upside wraps up in proper order in the material outside of downside, and through moulding in the runner that gathers, forms multilayer coextrusion film.

The concentric sleeve type multilayer co-extrusion film blowing die head generally comprises a die head main body, wherein a plurality of circular runners are sequentially wrapped in the die head main body from inside to outside, a gathering runner communicated with the circular runners is arranged at the top of the die head, and a plurality of material inlets communicated with the circular runners one by one are further arranged on the die head. During the use, import the material in to the ring runner through the material import, the material passes through the ring runner and flows, gets into in the runner that gathers to the material parcel in the ring runner in the outside is moulding in the runner that gathers in the ring runner of inboard, forms the multilayer and crowded film altogether.

The two modes need to stack the distribution disks from top to bottom or the diameter of the die head main body is larger, and the height or the diameter of the die head is increased along with the increase of the layer number of the composite film, so that the whole die head is very heavy, high in cost and not easy to maintain. Meanwhile, as the number of layers of the composite film increases, the flow path of the material at the bottom or inside becomes longer, the probability of material denaturation increases, the pressure required for material flow increases, and thus the defective rate and the production cost increase.

Disclosure of Invention

The invention aims to provide a die head of a multilayer co-extrusion film blowing machine, which aims to solve the problems that the size of the die head is increased greatly along with the increase of the number of layers of a produced composite film in the prior art, and the cost is high.

In order to achieve the purpose, the invention provides the following technical scheme that the multi-layer co-extrusion film blowing machine die head comprises a die head main body, wherein a plurality of circular runners are sequentially arranged on the die head main body from inside to outside, a gathering runner communicated with the circular runners is arranged at the top of the die head main body, a plurality of material inlets communicated with the circular runners respectively are arranged at the bottom of the die head main body, a plurality of batching discs are sequentially overlapped on the outer side of the upper part of the die head main body, annular runners communicated with the gathering runner are arranged in the batching discs, and material inlets communicated with the annular runners are also arranged on the outer sides of the batching discs.

The technical principle of the technical scheme is as follows:

materials are respectively introduced into the circular flow channel and the annular flow channel through the material inlets, and the materials gradually enter the gathering flow channel to form a multilayer composite film. In the process of forming the composite film, the materials are sequentially arranged along the direction from inside to outside of the circular flow passage → the circular flow passage from bottom to top.

The beneficial effects of the technical scheme are as follows:

1. in the technical scheme, the extrusion molding of the multilayer film can be realized by arranging the circular flow channel and the annular flow channel;

2. this technical scheme sets up the annular runner through setting up the ring channel and set up annular runner on the batching disc, can avoid the die head to set up more batching disc and the great condition of weight to appear because of the diameter is great or overlap, can reduce the manufacturing cost of die head moreover, reduces use cost.

Further, the gathering flow channel comprises a conical section on the lower side and a cylindrical section on the upper side, the large-diameter end of the conical section is communicated with the cylindrical section, the circular flow channel is communicated with the conical section, and the annular flow channel is communicated with the cylindrical section.

Has the advantages that: can assemble the material in gathering the runner at the ring runner to from inside to outside, the material sets gradually.

Further, the upper part of the die head main body is provided with an annular gap, the top of the batching disc is also fixed with a forming ring, and the gap and an annular channel between the batching disc and the forming ring form a cylindrical section.

Has the advantages that: through setting up the breach, can avoid having between drum section and the annular channel to block, the material of being convenient for assembles in the runner that gathers.

Further, sealing rings are arranged between the material mixing disk sheet at the bottom and the die head main body and between the material mixing disk sheet at the top and the forming ring.

Has the advantages that: the sealing ring is arranged, so that the sealing performance can be improved, the leakage of materials from a gap between the batching disc and the die head main body and the forming ring is reduced, and the influence on the quality of the formed composite film is further reduced.

Further, the cylinder section comprises a feeding section and a forming section, wherein the feeding section is located on the inner side of the material distribution disc, the forming section is located on the inner side of the forming ring, and the thickness of the forming section is gradually reduced from bottom to top.

Has the advantages that: after the materials pass through the forming section, the thickness of the forming section is gradually increased, so that the pressure applied to the materials is gradually increased, the compactness between the materials of each layer is higher, and the quality of the prepared composite film is improved.

Further, the thicknesses of the conical section and the feeding section are sequentially increased from bottom to top.

Has the advantages that: the material is followed supreme when assembling in the runner that gathers in proper order down, and the material increases gradually, increases in proper order through the thickness with toper section and reinforced section, can make things convenient for the material to deposit in proper order, and then can guarantee better extrusion effect.

Further, the annular flow passage is arranged from outside to inside in a downward inclined mode.

Has the advantages that: through setting up the slope of annular runner, can make the material downward flow, and then can shorten the distance between the annular runner of the ring runner of outer lane and bottom, consequently can reduce the flow time of material in the runner that gathers, and then reduce the probability that the rotten condition that the material caused because of long-time flow in the runner that gathers appears.

Further, the middle part of the die head main body is spirally provided with an auxiliary heat flow channel, the top of the auxiliary heat flow channel is communicated with an air inlet pipe, and the middle part of the die head main body is also provided with an air storage channel communicated with the bottom of the auxiliary heat flow channel.

Has the advantages that: leading-in steam in to the auxiliary heat runner through the intake pipe, along with the flow of steam, can realize carrying out auxiliary heating to the die head main part, reduce the probability of material solidification at the flow in-process. When the hot gas flows to the bottom end, the hot gas can be discharged through the gas storage channel.

Further, a cooling flow channel is arranged at the inner side of the forming ring of the die head main body and is spirally arranged, the top of the cooling flow channel is communicated with a cold air pipe, and the bottom of the cooling flow channel is communicated with a delivery pipe.

Has the advantages that: the cold air is introduced into the cooling flow channel through the cold air pipe, so that the material of the forming section can be cooled, and the film forming is convenient to meet. The delivery pipe can lead out cold air.

Further, the air conditioner also comprises a vortex tube which is respectively communicated with the cold air tube and the air inlet tube.

Has the advantages that: the vortex tube is arranged to generate hot air for auxiliary heating and cold air for forming.

Drawings

FIG. 1 is a partial cross-sectional view of a multi-layer co-extrusion film blowing machine die head 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 die head comprises a die head main body 1, a circular ring flow channel 11, a collecting flow channel 12, a conical section 121, a cylindrical section 122, a forming section 123, an auxiliary heat flow channel 13, a cooling flow channel 14, a gas storage channel 15, a gas outlet pipe 151, a material inlet 2, a batching disc 3, an annular flow channel 31, a sealing ring 4, a forming ring 5, a gas inlet pipe 6, a cooling pipe 7, a push block 8, a push rod 81, an extrusion plate 9 and a sealing rod 91.

Example 1:

the multi-layer co-extrusion film blowing machine die head is illustrated by 11 layers of co-extrusion film blowing machine die heads in the embodiment, and basically as shown in the attached drawing 1, the multi-layer co-extrusion film blowing machine die head comprises a die head main body 1, a plurality of circular runners 11 are sequentially arranged on the die head main body 1 from inside to outside, and a plurality of material inlets 2 which are respectively communicated with the circular runners 11 one by one are further arranged at the bottom of the die head main body 1. A collecting runner 12 is further arranged in the die head main body 1, and the circular ring runners 11 are communicated with the collecting runner 12.

The top of the die head main body 1 is provided with an annular gap, so that the die head main body 1 is in an inverted T shape, and the die head main body 1 comprises a small-diameter end on the upper side and a large-diameter end on the lower side. A plurality of material distribution discs 3 are sequentially overlapped at the upper part of the die head main body 1, and the adjacent material distribution discs 3 are connected through bolts. The batching disc 3 at the bottom is fixed at the top of the large-diameter end of the die head main body 1 through bolts, and a sealing ring 4 is arranged between the bottom of the batching disc 3 and the die head main body 1.

The collecting flow channel 12 comprises a conical section 121 at the lower part and a cylindrical section 122 at the upper part, the conical section 121 is communicated with the cylindrical section 122, and the circular flow channels 11 are communicated with the conical section 121; a cylindrical section 122 is formed between the inner circumference of the dosing disc 3 and the outer circumference of the small diameter end of the die body 1. Annular flow channels 31 are arranged in the material distribution disk 3, the annular flow channels 31 are communicated with the cylindrical section 122 of the collecting flow channel 12, and material inlets 2 communicated with the annular flow channels 31 are arranged outside the material distribution disk 3. The annular flow passage 31 is arranged to be inclined downwards from outside to inside, and the inclined angle is selected according to actual requirements, and in the embodiment, the inclined angle is 10 degrees. In this embodiment 5 dosage disks 3 and 6 annular flow channels 11 are provided.

The cylinder section 122 comprises a feeding section at the lower side and a shaping section 123 at the upper side, and a feeding section is arranged between the dosing disc 3 and the die head body 1. A forming ring 5 is fixed on the top of the batching disc 3 through a bolt, and a sealing ring 4 is arranged between the forming ring 5 and the batching disc 3; forming section 123 is formed between forming ring 5 and die body 1. The thickness of toper section 121 and the section of adding material all increases from supreme gradually, and the thickness of shaping section 123 reduces from supreme gradually.

An auxiliary hot runner 13 at the lower part and a cooling runner 14 at the upper side are arranged in the die head main body 1, the auxiliary hot runner 13 and the cooling runner 14 are both arranged in a spiral shape, and the top end of the auxiliary hot runner 13 is communicated with an air inlet pipe 6. The middle part of the die head main body 1 is provided with a gas storage channel 15, and the bottom of the auxiliary heat flow channel 13 is communicated with the gas storage channel 15. The top of the cooling flow channel 14 is communicated with a cooling pipe 7, the cooling pipe 7 penetrates through the bottom of the die head main body 1, the bottom of the cooling flow channel 14 is communicated with a delivery pipe, and the delivery pipe is communicated with the gas storage channel 15; the die head main body 1 is also provided with an air outlet pipe 151 communicated with the air storage channel 15.

The inboard of gathering runner 12 is equipped with annular iron sheet layer, and the inboard of iron sheet layer is equipped with polylith ejector pad 8, is fixed with push rod 81 on the ejector pad 8, and push rod 81 runs through 1 insidely of die head main part and extends to in the gas storage channel 15, and the top that push rod 81 is located the one end in the gas storage channel 15 is the scarf. An extrusion plate 9 is vertically and slidably connected in the gas storage channel 15, and a spring is welded between the bottom of the extrusion plate 9 and the bottom of the gas storage channel 15. The top of the compression plate 9 is further provided with a sealing rod 91, and the top end of the sealing rod 91 can be inserted into the air outlet pipe 151.

The specific implementation process is as follows:

when in use, the foam stabilizer is arranged above the die head main body 1, and the formed film bubble can be positioned in the foam stabilizer. And adding materials into the material inlet 2 by using an extrusion device, wherein the materials enter the gathering flow channel 12 through the circular flow channel 11 and the annular flow channel 31, and the materials are sequentially arranged according to the circular flow channel 11 from inside to outside → the annular flow channel 31 from bottom to top. And by continuing to add material, the material continues to move upward under pressure and into the forming section 123 to form a bubble. Because the thickness of the forming section 123 is reduced from bottom to top in turn, the extrusion forming of the material can be completed, and thus the film bubble is formed.

While the material is being fed, hot gas is fed into the auxiliary heat flow path 13 through the gas inlet pipe 6, and cold gas is fed into the cooling flow path 14 through the cooling pipe 7. The hot gas can flow along the auxiliary hot runner 13, and the temperature inside the conical section 121 is kept high, so that the probability of material plasticization is reduced, and the material can continuously flow upwards conveniently. And the cold air flows along the cooling runner 14, so that the temperature of the die head body 1 at the inner side of the forming section 123 is lower, and the cold air is convenient to plasticize and form a film bubble.

As the hot air and the cold air flow, the hot air passes through the bottom end of the auxiliary heat flow passage 13, and the cold air passes through the bottom end of the cooling flow passage 14 and enters the air storage channel 15. The cold air and the hot air enter the air storage channel 15 and are mixed to form normal temperature air.

As the cold air and the hot air gradually enter the air storage channel 15, the pressure inside the air storage channel 15 increases, and the pressing plate 9 is gradually pressed downward. When the stripper plate 9 moves down, the wedge surface on the push rod 81 can be extruded, so that the push rod 81 drives the push plate to slide outwards, thereby extruding the iron sheet layer, so that the gathering flow channel 12 is tight, thereby improving the pressure, facilitating the flow of the materials in the gathering flow channel 12, and gradually forming. Meanwhile, when the pressing plate 9 moves downwards, the sealing rod 91 is driven to move downwards, so that the sealing rod 91 is gradually separated from the gas outlet pipe 151, high-pressure gas in the gas storage channel 15 can be led out from the gas outlet pipe 151, and high-pressure gas is provided for the use of the bubble stabilizer.

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.