阅读说明：本技术 五层共挤吹膜机头 (Five-layer coextrusion film blowing machine head ) 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,公开了一种五层共挤吹膜机头,包括芯轴,芯轴外重叠设置有多个分配盘片,分配盘片和芯轴之间设置有汇总流道,分配盘片上均设有与汇总流道连通的环形流道,分配盘片外均设有分别与每个环形流道连通的物料进口,芯轴内还设有从内至外依次排布的圆环流道,圆环流道均与汇总流道连通,芯轴的底部也设有多个分别与圆环流道连通的物料进口；圆环流道和分配盘片的数量之和为五。本发明解决了现目前生产五层复合薄膜的五层共挤吹膜机头尺寸较大,导致成本较高的问题。(The invention belongs to the technical field of extrusion nozzles or die orifices, and discloses a five-layer co-extrusion film blowing machine head which comprises a mandrel, wherein a plurality of distribution discs are arranged outside the mandrel in an overlapped mode, a gathering flow channel is arranged between each distribution disc and the mandrel, annular flow channels communicated with the gathering flow channel are arranged on the distribution discs, material inlets respectively communicated with the annular flow channels are arranged outside the distribution discs, annular flow channels sequentially distributed from inside to outside are also arranged in the mandrel, the annular flow channels are communicated with the gathering flow channel, and a plurality of material inlets respectively communicated with the annular flow channels are also arranged 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 the current five-layer co-extrusion film blowing machine head for producing the five-layer composite film has larger size and higher cost.)

1. Five layers of coextrusion blown film aircraft noses, including the dabber, the dabber overlaps outward and is provided with a plurality of distribution discs, is provided with the runner that gathers between distribution disc and the dabber, all is equipped with on the distribution disc with gather the annular runner of runner intercommunication, all be equipped with outside the distribution disc respectively with the material import of every annular runner intercommunication, its characterized in that: the mandrel is also internally provided with circular runners which are sequentially arranged from inside to outside, the circular runners are communicated with the collecting 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.

2. The five-layer coextrusion die head according to claim 1, wherein: the annular flow passages are all obliquely arranged from outside to inside upwards.

3. The five-layer coextrusion die head according to claim 2, wherein: the distribution disc is provided with three, and the circular ring runner is provided with two.

4. The five-layer coextrusion die head according to claim 2, wherein: the distribution disc is provided with two, and the circular ring runner is provided with three.

5. The five-layer coextrusion die head according to claim 3 or 4, wherein: the thickness of the summary runner increases from bottom to top in sequence.

6. The five-layer coextrusion die head according to claim 5, wherein: the gathering flow channel comprises a cylindrical section communicated with the annular flow channel and a conical section communicated with the annular flow channel, and the conical section is arranged outwards from bottom to top in sequence.

7. The five-layer coextrusion die head according to claim 6, wherein: a mounting ring is further arranged at the top of the distribution disc at the top, and a forming flow channel communicated with the collecting flow channel is formed between the mounting ring and the outer wall of the mandrel; and a sealing ring is arranged between the distribution disc and the mounting ring.

8. The five-layer coextrusion die head according to claim 7, wherein: the inner side of the conical section in the mandrel is provided with an auxiliary heat flow channel, the auxiliary heat flow channel is spirally arranged, the bottom end of the auxiliary heat flow channel is communicated with a heating pipe, and a guide channel communicated with the top end of the auxiliary heat flow channel is further arranged in the mandrel.

9. The five-layer coextrusion die head according to claim 8, wherein: the inner side of the forming flow channel in the mandrel is provided with a cooling flow channel, the cooling flow channel is also spirally arranged, the top end of the cooling flow channel is communicated with a cooling pipe, and the bottom end of the cooling flow channel is communicated with a guide channel.

10. The five-layer coextrusion die head according to claim 9, wherein: the top of the guiding channel is communicated with a guiding pipe, and the guiding pipe penetrates through the top of the mandrel; lead out vertical sliding connection in the passageway and have pressure boost plate, be equipped with the spring between the bottom of pressure boost plate and the bottom of deriving the passageway, rotate on the pressure boost plate and be connected with the (mixing) shaft, be provided with rotor blade on the (mixing) shaft, and the (mixing) shaft can insert in the derivation pipe.

Technical Field

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

Background

The co-extrusion film blowing machine comprises an extrusion device and a machine head, wherein different plastic particles are heated and melted by a plurality of different extrusion devices and then extruded into the machine head, and a plurality of different melted materials are gathered and then extruded together to form a composite film. Because the composite film comprises a plurality of layers, usually odd layers, which comprise a framework layer positioned in the middle and functional layers positioned at two sides, the framework 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 co-extruded by using various different materials has higher use effect and lower cost, thereby being widely used.

At present, the widely used composite film comprises five layers of films, so that a coextrusion film blowing machine head is required to be used for forming the film bubble during production. Under the general condition, in order to improve the suitability, the coextrusion inflation film manufacturing machine head that often uses mainly is plane stack formula multilayer coextrusion inflation film manufacturing machine head, including dabber and a plurality of superposes at the distribution disc in the dabber outside, forms between dabber and the distribution disc and gathers the runner, all is equipped with on the distribution disc with gather runner intercommunication annular runner, the periphery of distribution disc still is equipped with 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 gathering the runner, and the material of upside wraps up in the material outside of downside in proper order to through moulding in gathering the runner, form composite film. The method has high applicability, and can finish processing different composite films by superposing and distributing the disks.

However, the co-extrusion film blowing machine head has the following problems that five layers of distribution discs are required to be stacked in sequence from top to bottom when the co-extrusion film blowing machine head is used, the diameter of a gathering flow channel needs to be larger if the size requirement is larger through the requirement on the size of a film, and the 5 layers of distribution discs are stacked, so that the whole machine head is larger in size and inconvenient to use and maintain; and the extrusion requires a large pressure and a certain temperature, so that the distribution disc and the mandrel both need to use high-pressure and high-temperature resistant materials, and the cost is high.

Disclosure of Invention

The invention aims to provide a five-layer co-extrusion film blowing machine head so as to solve the problem that the conventional co-extrusion film blowing machine head for producing a five-layer composite film is large in size and high in cost.

In order to achieve the purpose, the invention provides the following technical scheme that the five-layer co-extrusion film blowing machine head comprises a mandrel, wherein a plurality of distribution discs are arranged outside the mandrel in an overlapped mode, a gathering flow channel is arranged between the distribution discs and the mandrel, annular flow channels communicated with the gathering flow channel are arranged on the distribution discs, material inlets communicated with the annular flow channels are arranged outside the distribution discs respectively, annular flow channels which are sequentially distributed from inside to outside are also arranged in the mandrel, the annular flow channels are communicated with the gathering flow channel, and a plurality of material inlets communicated with the annular flow channels are also arranged 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 technical principle and the beneficial effects of the technical scheme are as follows:

materials are respectively led into the circular flow channel and the annular flow channel through the material inlets, and the materials can enter the gathering flow channel through the annular flow channel and the circular flow channel. And the materials are deposited along the circular flow passage from inside to outside and the circular flow passage from bottom to top in sequence, so that the five-layer composite film is formed. 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. And the molding of the five-layer composite film can be realized by setting the number of the annular runners and the distribution discs.

Further, the annular flow passages are all obliquely arranged from outside to inside upwards.

Has the advantages that: the annular flow channel is obliquely arranged, so that materials entering the gathering flow channel can be shortened at the transition part of the annular flow channel and the annular flow channel, the flowing time of the materials in the gathering flow channel can be shortened, and the probability of deterioration of the materials in the flowing process is reduced.

Furthermore, three distribution disks are arranged, and two circular flow channels are arranged.

Has the advantages that: the number of the annular runners is matched with that of the annular runners, so that the five-layer co-extrusion film blowing machine head is ensured to be small in size while the five-layer composite film is formed, and the cost of equipment is reduced.

Furthermore, two distribution disks are arranged, and three circular flow passages are arranged.

Has the advantages that: the number of the annular runners is matched with that of the annular runners, so that the five-layer co-extrusion film blowing machine head is ensured to be small in size while the five-layer composite film is formed, and the cost of equipment is reduced.

Further, the thickness of the summary flow channel is increased from bottom to top in sequence.

Has the advantages that: along with the material gets into gradually in gathering the runner, can make the interior material of gathering the runner increase gradually, consequently through the setting to thickness, can adapt to the joining of material to the shaping of the composite film of being convenient for.

Further, the gathering flow channel comprises a cylindrical section communicated with the annular flow channel and a conical section communicated with the annular flow channel, and the conical section is sequentially arranged outwards from bottom to top.

Has the advantages that: the gathering flow channel communicated with the circular flow channel is set to be conical, so that materials can enter and flow conveniently.

Further, the top of the distribution disc at the top is also provided with a mounting ring, and a forming flow channel communicated with the collecting flow channel is formed between the mounting ring and the outer wall of the mandrel; and a sealing ring is arranged between the distribution disc and the mounting ring.

Has the advantages that: a forming flow channel is formed between the mounting ring and the mandrel, so that materials can be conveniently plasticized and formed in the forming flow channel.

Furthermore, the inner side of the conical section in the mandrel is provided with an auxiliary heat flow channel, the auxiliary heat flow channel is spirally arranged, the bottom end of the auxiliary heat flow channel is communicated with a heating pipe, and a guide channel communicated with the top end of the auxiliary heat flow channel is further arranged in the mandrel.

Has the advantages that: the auxiliary heating runner is arranged to assist the heating of the materials in the circular ring channel, so that the plasticizing probability of the materials is reduced, and the materials can flow smoothly in the gathering runner. The auxiliary flow channel is spirally arranged, so that the flow path is longer, and the effect of auxiliary heating is further improved.

Furthermore, a cooling flow channel is arranged on the inner side of the forming flow channel in the mandrel and is also arranged spirally, the top end of the cooling flow channel is communicated with a cooling pipe, and the bottom end of the cooling flow channel is communicated with the derivation channel.

Has the advantages that: the cooling runner can cool the material entering the molding runner, so that the material is plasticized conveniently to form the film bubble.

Further, the top of the guiding channel is communicated with a guiding pipe, and the guiding pipe penetrates through the top of the mandrel; lead out vertical sliding connection in the passageway and have pressure boost plate, be equipped with the spring between the bottom of pressure boost plate and the bottom of deriving the passageway, rotate on the pressure boost plate and be connected with the (mixing) shaft, be provided with rotor blade on the (mixing) shaft, and the (mixing) shaft can insert in the derivation pipe.

Has the advantages that: the hot air flowing in the auxiliary heat flow passage and the cold air flowing in the cooling flow passage both enter the guide-out passage and impact the rotating blades on the stirring shaft, so that the hot air and the cold air are mixed, and the temperature of the air is kept in a moderate state. Simultaneously, piling up in the derivation passageway along with gas, can making the pressure increase in the derivation passageway to extrude the pressure boost board, and drive the (mixing) shaft and withdraw from in the derivation pipe, thus gas in the gas guide passageway just can be discharged with higher velocity of flow and pressure. After the primary formed film bubble enters the bubble stabilizer, the discharged high-pressure gas in the gas guide channel enters the middle of the film bubble to guide the flow of the film bubble, and the film bubble is plasticized and shaped by introducing cold air to the outer side of the film bubble, so that a film is formed.

Drawings

FIG. 1 is a partial cross-sectional view of a five-layer coextrusion blowing head according to the invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the heat exchanger comprises a mandrel 1, an annular flow passage 11, an auxiliary heat flow passage 12, a cooling flow passage 13, a guide-out passage 14, a collecting flow passage 15, a cylindrical section 151, a conical section 152, a distribution disc 2, an annular flow passage 21, a sealing ring 3, a mounting ring 4, a forming flow passage 41, a heating pipe 5, a cooling pipe 6, a pressurizing plate 7, a stirring shaft 71, rotating blades 711 and a guide-out pipe 8.

Example 1:

the five-layer coextrusion film blowing machine head is basically shown in figure 1 and comprises a mandrel 1 and distribution discs 2 which are overlapped outside the mandrel 1, wherein the outer side of the upper part of the mandrel 1 is provided with an annular gap, so that an installation platform is arranged on the mandrel 1, the distribution discs 2 at the bottom are fixed on the installation platform through bolts, and a sealing ring 3 is arranged between the distribution discs 2 and the installation platform. The distribution disc 2 on the top is connected with a mounting ring 4 through bolts, and a sealing ring 3 is also arranged between the mounting ring 4 and the distribution disc 2 on the top. A molding runner 41 is formed between the mounting ring 4 and the top of the notch, and the thickness of the molding runner 41 is reduced from bottom to top in sequence.

The distribution disk 2 is further provided with an annular flow passage 21, the annular flow passage 21 is arranged in a downward inclined manner from outside to inside, the inclined angle of the annular flow passage 21 is 20-30 degrees, and 20 degrees is preferred in the embodiment. On the outer side of each distribution disc 2 there is a material inlet communicating with the annular flow channel 21.

Be equipped with annular runner 15 that gathers in the dabber 1, gather the thickness of runner 15 and increase from bottom to top in proper order, gather runner 15 and include the toper section 152 of downside and the cylinder section 151 of upside. A cylindrical section 151 communicating with the molding flow path 41 is formed between the inner side of the distribution disk 2 and the notch, and the inner sides of the annular flow paths 21 are all communicated with the cylindrical section 151.

The mandrel 1 is also internally provided with a plurality of circular runners 11 which are communicated with the conical section 152 from inside to outside in sequence, and the sum of the number of the circular runners 11 and the number of the circular runners 21 is five. The number of the annular flow channels 11 may be set to 3, the number of the annular flow channels 21 may be set to 2, or the number of the annular flow channels 11 may be set to 2, and the number of the annular flow channels 21 may be set to 3, in this embodiment, it is preferable that the number of the annular flow channels 11 is 3, and the number of the annular flow channels 21 is 2, that is, two distribution disks 2 are provided. The bottom of the mandrel 1 is also provided with three material inlets which are respectively communicated with the three circular runners 11.

An auxiliary heat flow passage 12 is arranged on the inner side of the conical section 152 in the mandrel 1, the auxiliary heat flow passage 12 is spirally arranged, and the bottom end of the auxiliary heat flow passage 12 is communicated with a heating pipe 5. The mandrel 1 is also internally provided with a guide-out channel 14, the auxiliary heat flow channel 12 is wrapped outside the guide-out channel 14, and the top end of the auxiliary heat flow channel 12 is communicated with the guide-out channel 14. A cooling flow channel 13 is further arranged on the inner side of the forming flow channel 41 in the mandrel 1, the cooling flow channel 13 is also spirally arranged, the top end of the cooling flow channel 13 is communicated with a cooling pipe 6, and the cooling pipe 6 penetrates through the mandrel 1 and extends out of the bottom of the mandrel 1; the bottom end of the cooling flow passage 13 communicates with the lead-out passage 14.

Lead out in the passageway 14 vertical sliding connection have pressure boost plate 7, and the bottom welding of pressure boost plate 7 has the spring, and the bottom welding of spring is in the bottom of leading out passageway 14. The top of the pressure increasing plate 7 is also rotatably connected with a stirring shaft 71, the stirring shaft 71 is provided with rotating blades 711, and the communication part of the cooling channel 13 and the outlet channel 14 and the communication part of the auxiliary heat channel 12 and the outlet channel 14 are opposite to the rotating blades 711, so that when gas is introduced into the outlet channel 14, the gas impacts the rotating blades 711 to realize the rotation of the rotating blades 711. The top of the guiding channel 14 is communicated with a guiding pipe 8, the guiding pipe 8 penetrates through the top of the mandrel 1, and the stirring shaft 71 can be inserted into the guiding pipe 8.

The specific implementation process is as follows:

in use, a bubble stabilizer is provided above the mandrel 1 and the formed film bubble is allowed to sit within the bubble stabilizer. And adding materials into the material inlet by using an extrusion device, wherein the materials enter the gathering flow passage 15 through the circular flow passage 11 and the annular flow passage 21, and the materials are sequentially arranged according to the circular flow passage 11 from inside to outside → the annular flow passage 21 from bottom to top. And by continuously adding the material, the material continuously moves upwards under the action of pressure and enters the forming runner 41 to form the film bubble. Because the thickness of the molding runner 41 is reduced from bottom to top in sequence, the extrusion molding 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 12 through the heating pipe 5, and cold gas is fed into the cooling flow path 13 through the cooling pipe 6. The hot gas can flow along the auxiliary hot runner 12, and the temperature inside the conical section 152 is kept high, so that the probability of material plasticization is reduced, and the material can flow upwards continuously. And the cold air flows along the cooling runner 13, so that the temperature of the mandrel 1 at the inner side of the forming runner 41 is lower, and the plasticizing is facilitated to form a film bubble.

As the hot gas and the cold gas flow, the hot gas passes through the top end of the auxiliary hot runner 12, and the cold gas passes through the bottom end of the cooling runner 13 into the outlet channel 14. After entering the outlet channel 14, the cold air and the hot air both impact the rotating blades 711, so that the stirring shaft 71 and the rotating blades 711 rotate, the cold air and the hot air are mixed, and the temperature of the air is reduced.

As the accumulation amount of the gas in the discharge passage 14 increases, the pressure in the discharge passage 14 increases, and the pressurizing plate 7 is further pressed, and the pressurizing plate 7 drives the stirring shaft 71 to move down, so that the discharge pipe 8 is communicated with the discharge passage 14, and the gas in the discharge passage 14 is discharged through the discharge pipe 8. Because the guiding channel 14 is in a high-pressure state, the gas discharged from the guiding pipe 8 is in a high-speed and high-pressure state, and can provide high-pressure gas for the bubble to be blown in 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.