CN114228126A - Multilayer overlapping heterodromous rotary blown film device - Google Patents
Multilayer overlapping heterodromous rotary blown film device Download PDFInfo
- Publication number
- CN114228126A CN114228126A CN202111432121.XA CN202111432121A CN114228126A CN 114228126 A CN114228126 A CN 114228126A CN 202111432121 A CN202111432121 A CN 202111432121A CN 114228126 A CN114228126 A CN 114228126A
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- CN
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- Prior art keywords
- rotary
- transmission gear
- ring
- input gear
- mold
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Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 45
- 239000000155 melt Substances 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000000071 blow moulding Methods 0.000 abstract description 7
- 239000004033 plastic Substances 0.000 abstract description 6
- 229920003023 plastic Polymers 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002985 plastic film Substances 0.000 abstract description 3
- 229920006255 plastic film Polymers 0.000 abstract description 3
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- 239000004974 Thermotropic liquid crystal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
Abstract
The invention discloses a multilayer overlapped anisotropic rotary blown film device, which relates to the technical field of plastic film production equipment and comprises an internal rotary core mold, wherein an air channel penetrating through the whole internal rotary core mold is arranged in the internal rotary core mold; the outer rotating die ring is sleeved outside the inner rotating core die, and a gap is formed between the outer rotating die ring and the inner rotating core die to form a melt runner; and the driving assembly comprises an input gear, an inner rotary transmission gear connected with the inner rotary core mold and an outer rotary transmission gear connected with the outer rotary mold ring, one side of the input gear is meshed with the inner rotary transmission gear to drive the inner rotary core mold to rotate, and the other side of the input gear is meshed with the outer rotary transmission gear to drive the outer rotary mold ring to reversely rotate, so that the inner rotary core mold and the outer rotary mold ring rotate in different directions. The invention reduces the anisotropy of the plastic blow molding film with higher orientation degree, leads the film to tend to be isotropic, improves the stability of the melt flow channel gap of the blow molding film forming die and improves the thickness uniformity of the film.
Description
Technical Field
The invention relates to the technical field of plastic film production equipment, in particular to a multilayer overlapping anisotropic rotating blown film device.
Background
The principle of plastic film forming is that the melt in viscous state is pressed into a die head from the front end of a screw extruder, the melt is extruded into a pipe blank shape through the die head, the pipe blank is uniformly and freely blown into a film with a larger diameter by utilizing compressed air introduced from the bottom of the die head, meanwhile, the tubular film is longitudinally stretched in the upward traction process, then is flattened by a herringbone plate, is pulled by a traction roller, and finally is rolled into a cylinder. However, for plastics with high orientation degree, the conventional blown film forming equipment has anisotropy in the blown film, for example, thermotropic Liquid Crystal Polymer (LCP) has large difference in the anisotropy of the film, and thus the film often cannot meet the practical engineering application. In addition, the melt flow channel gap of the blown film forming die is unstable, so that the thickness of the film is not uniform, and the stability or continuity of production is even affected.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides a multilayer overlapped anisotropic rotary blown film device, which can reduce the anisotropy of a film formed by blow molding of plastic with higher orientation degree, make the film tend to be isotropic, improve the stability of a melt flow channel gap of a blow molding film forming die and improve the thickness uniformity of the film.
The multilayer overlapped anisotropic rotary blown film device comprises an inner rotary core mold, wherein an air channel penetrating through the whole inner rotary core mold is formed inside the inner rotary core mold; the outer rotating die ring is sleeved outside the inner rotating core die, and a gap is formed between the outer rotating die ring and the inner rotating core die to form a melt runner; and the driving assembly comprises an input gear, an internal rotation transmission gear connected with the internal rotation core mold and an external rotation transmission gear connected with the external rotation mold ring, one side of the input gear is meshed with the internal rotation transmission gear to drive the internal rotation core mold to rotate, the other side of the input gear is meshed with the external rotation transmission gear to drive the external rotation mold ring to reversely rotate, so that the internal rotation core mold and the external rotation mold ring rotate in different directions.
In an alternative or preferred embodiment, the external rotation transmission gear and the input gear are in shaft gear transmission, the internal rotation transmission gear and the input gear are in shaft gear transmission, and the external rotation transmission gear and the internal rotation transmission gear are respectively positioned at the upper side and the lower side of the input gear.
In an alternative or preferred embodiment, the apparatus further comprises a housing assembly, the outer rotary die ring is connected to the outer rotary transmission gear, and the outer rotary die ring and the outer rotary transmission gear are both mounted inside the housing assembly.
In an alternative or preferred embodiment, the housing assembly includes an upper housing within which the outer rotary die ring is disposed, the upper housing being provided with a plurality of feed ports in communication with the melt channel.
In an alternative or preferred embodiment, an annular runner communicating with the melt runner is provided between the outer rotary die ring and the upper end housing, and the feed port is communicated with the annular runner.
In an optional or preferred embodiment, the casing assembly includes an upper end cover, an upper end casing, a lower end casing, and a lower end cover, which are connected in sequence, a first bearing is disposed between the outer rotary die ring and the inner rotary die, the inner rotary transmission gear is mounted on the lower end cover through a second bearing, a third bearing is disposed between the upper end of the outer rotary die ring and the upper end casing, and a fourth bearing is disposed between the lower end of the outer rotary die ring transmission shaft and the lower end casing.
In an alternative or preferred embodiment, the drive assembly further comprises an input gear shaft, the input gear being disposed on the input gear shaft, the input gear shaft being mounted to the lower end housing.
In an alternative or preferred embodiment, the upper end housing is fitted with a heater.
In an alternative or preferred embodiment, a swivel is mounted to the lower end of the inner rotating mandrel.
Based on the technical scheme, the embodiment of the invention at least has the following beneficial effects: according to the technical scheme, by designing the driving assembly, one side of the input gear is meshed with the internal rotation transmission gear to drive the internal rotation core mold to rotate, the other side of the input gear is meshed with the external rotation transmission gear to drive the external rotation mold ring to rotate in the opposite direction, and therefore the internal rotation core mold and the external rotation mold ring rotate in the opposite direction. And conveying the melt to a melt flow channel, extruding the melt upwards along the melt flow channel formed by the gap between the inner rotary core die and the outer rotary die ring to form a pipe blank, driving the inner rotary core die and the outer rotary die ring to rotate in different directions by an input gear, and introducing compressed air with preset pressure and flow into an air channel to uniformly and freely blow the pipe blank into a film with a preset diameter by the compressed air. The internal rotating core die and the external rotating die ring rotate in different directions, so that the stability of a melt runner gap can be improved, and the thickness uniformity of a film is improved; the anisotropy of the plastic blow molding film with higher orientation degree is reduced to make the film tend to be isotropic, and the input gear can drive the inner rotating core mold and the outer rotating mold ring simultaneously, so that the structural cost is reduced.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
fig. 3 is a perspective view of a drive assembly in an embodiment of the invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 3, the multi-layered stacked counter-rotating blown film apparatus includes an inner rotating core mold 31, an outer rotating mold ring 41, and a driving assembly, wherein the outer rotating mold ring 41 is fitted around the outer portion of the inner rotating core mold 31.
The driving component comprises an input gear 23, an inner rotation transmission gear 24 connected with the inner rotation core mold 31 and an outer rotation transmission gear 25 connected with the outer rotation mold ring 41, one side of the input gear 23 is meshed with the inner rotation transmission gear 24 to drive the inner rotation core mold 31 to rotate, and the other side of the input gear 23 is meshed with the outer rotation transmission gear 25 to drive the outer rotation mold ring 41 to rotate reversely, so that the inner rotation core mold 31 and the outer rotation mold ring 41 rotate in different directions. Specifically, the external rotation transmission gear 25 and the input gear 23 are in crossed-axis gear transmission, the internal rotation transmission gear 24 and the input gear 23 are in crossed-axis gear transmission, and the external rotation transmission gear 25 and the internal rotation transmission gear 24 are respectively positioned on the upper side and the lower side of the input gear 23. One side of the input gear 23 is engaged with the internal rotation transmission gear 24 to drive the internal rotation core mold 31 to rotate, and the other side of the input gear 23 is engaged with the external rotation transmission gear 25 to drive the external rotation mold ring 41 to rotate in the opposite direction, so that the internal rotation core mold and the external rotation mold ring rotate in the opposite direction. By this arrangement, the input gear can simultaneously drive the inner rotary core mold and the outer rotary mold ring, and the inner rotary core mold and the outer rotary mold ring rotate in opposite directions.
The inner rotary core mold 31 has an air passage 32 formed therein throughout the inner rotary core mold 31. In addition, a rotary joint 33 is installed at the lower end of the inner rotary core mold 31 for introducing compressed air into the air passage 32.
The outer rotary die ring 41 is fitted over the outer portion of the inner rotary die 31 with a gap therebetween to form a melt flow channel 73.
It will be appreciated that the melt is supplied to the melt channel 73, the melt is extruded upwards into a parison along the melt channel 73 formed by the gap between the inner rotary die 31 and the outer rotary die ring 41, the input gear 23 drives the inner rotary die 31 and the outer rotary die ring 41 to rotate in opposite directions, and the air passage 32 is supplied with compressed air of a predetermined pressure and flow rate, so that the compressed air uniformly and freely blows the parison into a film 74 of a predetermined diameter size, and the film 74 has a film cavity 34 therein. The inner rotary core die 31 and the outer rotary die ring 41 rotate in different directions, so that the stability of the gap of a melt runner can be improved, and the thickness uniformity of a film is improved; the anisotropy of the plastic blow molding film with higher orientation degree is reduced, so that the plastic blow molding film tends to be isotropic.
As shown in fig. 1, the multilayer-stacked anisotropic-rotation blown film apparatus further comprises a housing assembly, wherein the housing assembly comprises an upper end cover 11, an upper end shell 12, a lower end shell 13 and a lower end cover 14, which are connected in sequence. In this embodiment, the outer rotary die ring 41 is connected to the outer rotary drive gear 25, and both the outer rotary die ring 41 and the outer rotary drive gear 25 are installed inside the housing assembly.
In this embodiment, the housing assembly includes an upper housing 12, the outer rotating die ring 41 is disposed within the upper housing 12, the upper housing 12 is provided with a plurality of feed ports 71, and the feed ports 71 communicate with the melt channel 73. An annular flow channel 72 communicated with a melt flow channel 73 is arranged between the outer rotary die ring 41 and the upper end shell 12, and the feed inlet 71 is communicated with the annular flow channel 72. Referring to fig. 2, the melt flows from the three feed openings 71 into the annular channel 72, and then flows from the annular channel 72 into the melt channel 73, and the annular channel 72 and the melt channel 73 are communicated with each other through a plurality of branch channels.
In one embodiment, the upper housing 12 is fitted with a heater 61.
In addition, the driving assembly further comprises an input gear shaft 22, and an input gear 23 is disposed on the lower end housing 13, in a specific application, the input gear shaft 22 is driven by a motor, the lower end housing 13 may be provided with a bearing mounting seat, and the input gear shaft 22 is mounted in the bearing mounting seat through a bearing.
Before the blown film forming operation, the heater 61 is turned on to heat the outer rotary mold ring 41 and the inner rotary core mold 31 to a predetermined temperature. One or two or three kinds of melt are then fed through the feed opening 71 to the melt channel 73, and the melt is extruded upward into a parison along the melt channel formed by the gap between the inner rotary die 31 and the outer rotary die ring 41. Subsequently, the motor drives the inner rotary core die 31 and the outer rotary die ring 41 to rotate in opposite directions, and compressed air of a predetermined pressure and flow rate is introduced through the rotary joint 33, so that the compressed air uniformly and freely blows the parison into a film 74 of a predetermined diameter size. The film is upwards drawn by a drawing device, longitudinally stretched, flattened by a herringbone plate, drawn by a drawing roller and finally wound into a cylinder.
Preferably, a first bearing 51 is provided between the outer rotary die ring 41 and the inner rotary die 31, the inner rotary drive gear 24 is mounted on the lower end cap 14 through a second bearing 52, a third bearing 53 is provided between the upper end of the outer rotary die ring 41 and the upper end housing 12, and a fourth bearing 54 is provided between the lower end of the outer rotary die ring drive shaft 43 and the lower end housing 13.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (9)
1. Multilayer coincide incongruous rotatory blown film device, its characterized in that: comprises that
The inner rotating core mold is internally provided with an air channel penetrating through the whole inner rotating core mold;
the outer rotating die ring is sleeved outside the inner rotating core die, and a gap is formed between the outer rotating die ring and the inner rotating core die to form a melt runner; and
the driving assembly comprises an input gear, an internal rotation transmission gear connected with the internal rotation core mold and an external rotation transmission gear connected with the external rotation mold ring, one side of the input gear is meshed with the internal rotation transmission gear to drive the internal rotation core mold to rotate, the other side of the input gear is meshed with the external rotation transmission gear to drive the external rotation mold ring to reversely rotate, and therefore the internal rotation core mold and the external rotation mold ring rotate in different directions.
2. The apparatus according to claim 1, wherein: the external rotation transmission gear and the input gear are in crossed shaft gear transmission, the internal rotation transmission gear and the input gear are in crossed shaft gear transmission, and the external rotation transmission gear and the internal rotation transmission gear are respectively positioned on the upper side and the lower side of the input gear.
3. The multilayer laminated counter-rotating blown film apparatus according to claim 1 or 2, wherein: the multilayer overlapped heterodromous rotating blown film device further comprises a shell assembly, the outer rotating die ring is connected with the outer rotating transmission gear, and the outer rotating die ring and the outer rotating transmission gear are both installed inside the shell assembly.
4. The apparatus according to claim 3, wherein: the shell assembly comprises an upper end shell, the outer rotating die ring is arranged in the upper end shell, the upper end shell is provided with a plurality of feed inlets, and the feed inlets are communicated with the melt flow channel.
5. The apparatus according to claim 4, wherein: an annular runner communicated with the melt runner is arranged between the outer rotary die ring and the upper end shell, and the feed inlet is communicated with the annular runner.
6. The apparatus according to claim 3, wherein: the shell assembly comprises an upper end cover, an upper end shell, a lower end shell and a lower end cover which are sequentially connected, the outer rotating die ring and the inner rotating die are provided with first bearings, the inner rotating transmission gear is installed on the lower end cover through a second bearing, a third bearing is arranged between the upper end of the outer rotating die ring and the upper end shell, and a fourth bearing is arranged between the lower end of the outer rotating die ring and the lower end shell.
7. The apparatus according to claim 6, wherein: the drive assembly further comprises an input gear shaft, the input gear is arranged on the input gear shaft, and the input gear shaft is mounted on the lower end shell.
8. The apparatus according to claim 6, wherein: the upper end shell is provided with a heater.
9. The apparatus according to claim 1, wherein: and a rotary joint is arranged at the lower end of the inner rotary core die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111432121.XA CN114228126A (en) | 2021-11-29 | 2021-11-29 | Multilayer overlapping heterodromous rotary blown film device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111432121.XA CN114228126A (en) | 2021-11-29 | 2021-11-29 | Multilayer overlapping heterodromous rotary blown film device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114228126A true CN114228126A (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111432121.XA Pending CN114228126A (en) | 2021-11-29 | 2021-11-29 | Multilayer overlapping heterodromous rotary blown film device |
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| CN (1) | CN114228126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115157622A (en) * | 2022-06-15 | 2022-10-11 | 华南理工大学 | Multilayer melt spiral interweaving orientation co-extrusion blow molding die and method |
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| WO2009155883A1 (en) * | 2008-06-27 | 2009-12-30 | Fang Yong | Film blowing machine rotary die head for starch biodegradation material |
| CN207758089U (en) * | 2017-12-26 | 2018-08-24 | 东莞市正新包装制品有限公司 | Spiral lamination molding die and film blowing device |
| CN211891864U (en) * | 2020-02-19 | 2020-11-10 | 广东金明精机股份有限公司 | Film blowing die head with rotary oriented die |
| CN113524632A (en) * | 2021-07-20 | 2021-10-22 | 重庆沃特智成新材料科技有限公司 | Film blowing device |
-
2021
- 2021-11-29 CN CN202111432121.XA patent/CN114228126A/en active Pending
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| WO2009155883A1 (en) * | 2008-06-27 | 2009-12-30 | Fang Yong | Film blowing machine rotary die head for starch biodegradation material |
| US20110081440A1 (en) * | 2008-06-27 | 2011-04-07 | Fang Yong | Rotary die head of film blowing machine for starch biodegradable material |
| CN207758089U (en) * | 2017-12-26 | 2018-08-24 | 东莞市正新包装制品有限公司 | Spiral lamination molding die and film blowing device |
| CN211891864U (en) * | 2020-02-19 | 2020-11-10 | 广东金明精机股份有限公司 | Film blowing die head with rotary oriented die |
| CN113524632A (en) * | 2021-07-20 | 2021-10-22 | 重庆沃特智成新材料科技有限公司 | Film blowing device |
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| 赵素合: "《塑料成型机械使用维修手册》", 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115157622A (en) * | 2022-06-15 | 2022-10-11 | 华南理工大学 | Multilayer melt spiral interweaving orientation co-extrusion blow molding die and method |
| CN115157622B (en) * | 2022-06-15 | 2023-09-05 | 华南理工大学 | Multilayer melt spiral interweaving orientation coextrusion blow molding die and method |
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Application publication date: 20220325 |