CN114905720A - Film blowing die head - Google Patents
Film blowing die head Download PDFInfo
- Publication number
- CN114905720A CN114905720A CN202210490304.5A CN202210490304A CN114905720A CN 114905720 A CN114905720 A CN 114905720A CN 202210490304 A CN202210490304 A CN 202210490304A CN 114905720 A CN114905720 A CN 114905720A
- Authority
- CN
- China
- Prior art keywords
- spiral body
- die
- annular block
- blown film
- film die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010096 film blowing Methods 0.000 title abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000009415 formwork Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 6
- 238000009416 shuttering Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 description 18
- 239000010408 film Substances 0.000 description 11
- 239000010409 thin film Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- 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
-
- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a film blowing die head which comprises a die shell, a spiral body, a die ring, an adapter and an air pipe joint, wherein an air passage penetrating through the top of the spiral body is arranged in the spiral body along the axial direction of the spiral body, a plurality of discharging channels are outwards arranged in the spiral body along the radial direction of the spiral body, the adapter is arranged at the bottom of the spiral body and is communicated with a feeding hole of the feeding channel, the die shell is fixedly sleeved on the outer side of the spiral body and forms a flow passage with the lower end sealed with the spiral body, an annular block is arranged above a discharging hole of the discharging channel of the spiral body, the distance between the annular block and the die shell corresponding to the discharging hole is larger than the distance between the two sides of the annular block and the die shell, the die ring is fixedly sleeved at the top end of the spiral body and is positioned at the top of the die shell, the discharging channel is formed between the die ring and the spiral body, and the air pipe joint is fixed on the spiral body and is communicated with the air passage. The invention effectively ensures the uniform thickness of each part of the film and improves the cost and the quality of the film.
Description
Technical Field
The invention relates to a film blowing die head, and belongs to the technical field of film blowing components.
Background
The film blowing die head is an important component of film production equipment, and directly influences the quality of produced films. Most of the existing film blowing die heads comprise a die shell, a spiral body, a die ring and the like, wherein the spiral body is arranged in the die shell, the die ring is sleeved on the spiral body, a spiral groove is formed in the side surface of the spiral body along the axial direction of the spiral body, a feeding channel communicated with the spiral groove is arranged at the bottom of the spiral body, and a melt enters the spiral groove from a feeding channel, spirally rises to a discharging channel between the spiral body and the die ring along the spiral groove and is blown by an air passage to form a film. Although the film blowing die can meet the use requirements to a certain extent, the defects are as follows: when the outlet of the spiral groove enters the discharging channel, the flow velocity of the melt is different at each position in the discharging channel, so that the melt is not uniformly distributed, and the phenomenon of uneven thickness of the film appears after the melt is blown into the film, thereby influencing the quality of the film.
Disclosure of Invention
The invention provides a film blowing die head for overcoming the defects in the prior art.
The invention can be realized by adopting the following technical scheme:
a film blowing die head comprises a die shell, a spiral body, a die ring, an adapter and an air pipe joint, wherein an air passage penetrating through the top of the spiral body is arranged in the spiral body along the axial direction of the spiral body, a plurality of discharging channels are arranged in the spiral body along the radial direction of the spiral body, the adapter is arranged at the bottom of the spiral body and is communicated with the feeding hole of the feeding channel, the shuttering is fixedly sleeved outside the spiral body and forms a flow passage with the lower end sealed with the spiral body, the spiral body is provided with an annular block above the discharge hole of the discharge channel, the distance between the annular block and the mould shell corresponding to the discharge hole is larger than the distance between the two sides of the annular block and the mould shell, the die ring fixing sleeve is arranged at the top end of the spiral body and positioned at the top of the formwork, a discharge channel is formed between the die ring and the spiral body, and the air pipe joint is fixed on the spiral body and communicated with the air passage.
Preferably, the distance between the annular block and the formwork is gradually reduced from the corresponding position of the discharge hole to two positions.
Preferably, the middle part of the spiral body forms an annular groove in the upper direction of the annular block.
Preferably, the groove and the top end of the spiral body and the annular block form circular arc transition.
Preferably, the bottom of the spiral body is provided with a base, the adapter is installed on the base, the upper end of the adapter penetrates through the base and extends out of the spiral body, and the bottom of the formwork is fixed on the base.
Preferably, a plurality of said feed channels are circumferentially distributed on said spiral body.
Preferably, the annular block and the bottom end of the spiral body form a circular arc transition.
Preferably, the annular block is integrally formed with the spiral body.
Preferably, a first heater is arranged on the outer side of the die ring.
Preferably, a second heater is arranged on the outer side of the formwork.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the annular block is arranged above the discharge hole of the spiral body in the discharge channel, the distance between the annular block corresponding to the discharge hole and the mould shell is larger than the distance between the two sides of the spiral body and the mould shell, the melt is diffused towards the four sides after coming out of the outlet of the feed channel and moves upwards along the flow channel, and the distance between the annular block and the mould shell is gradually reduced due to the fact that the flow velocity of the melt at the outlet is maximum and gradually reduced towards the two sides, so that the melt flow of the flow channel is kept uniform and moves upwards to enter the discharge channel, and then the melt is blown into a thin film through the air channel, the thickness of each part of the thin film is effectively ensured to be uniform, and the cost quality of the thin film is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a blown film die of the present invention;
FIG. 2 is an exploded view of the blown film die of the present invention;
FIG. 3 is a schematic structural view of the spiral body of the present invention;
FIG. 4 is a cross-sectional view of the spiral and formwork of the present invention;
the device comprises a mould shell 1, a spiral body 2, a mould ring 3, an adapter 4, an air pipe connector 5, a base 6, a first heater 7, a second heater 8, a flow channel 11, an air channel 21, a feeding channel 22, an annular block 23, a groove 24 and a discharging channel 31.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Example 1
As shown in fig. 1 to 4, the film blowing die head of this embodiment includes a die shell 1, a spiral body 2, a die ring 3, an adaptor 4 and an air pipe joint 5, an air passage 21 penetrating through the top of the spiral body 2 is axially arranged inside the spiral body 2, a plurality of discharging channels 22 are radially and outwardly arranged inside the spiral body 2, the adaptor 4 is installed at the bottom of the spiral body 2 and is communicated with a feeding port of the feeding channel 22, the die shell 1 is fixedly sleeved outside the spiral body 2 and forms a flow channel 11 with a sealed lower end with the spiral body 2, the spiral body 2 is provided with an annular block 23 above a discharging port of the discharging channel 22, a distance between the annular block 23 and the die shell 1 corresponding to the discharging port is larger than a distance between two sides of the annular block and the die shell 1, the die ring 3 is fixedly sleeved at the top end of the spiral body 2 and is located at the top of the die shell 1, a discharge channel 31 is formed between the die ring 3 and the spiral body 2, and the air pipe joint 5 is fixed on the spiral body 2 and communicated with the air passage 21. The melt enters the bottom of the spiral body 2 from the adapter 4, flows out and diffuses through the feeding channel 22 and moves upwards along the flow channel 11 between the mold shell 1 and the spiral body 2, because the flow at the outlet of the feeding channel 22 is high in flow speed and gradually decreases towards two sides, the distance between the annular block 23 and the mold shell 1 gradually decreases, the melt flow of the flow channel is kept uniform and moves upwards to enter the discharging channel 31, and then the melt is blown into a film through the air channel 21. The film blowing die head of the embodiment effectively ensures that the thickness of the film is uniform everywhere, and the cost and the quality of the film are improved.
In this embodiment, the distance between the ring block 23 and the mold shell 1 is gradually reduced from the corresponding position of the discharge port to two sides, so that the melt flow rate at each position is kept the same. The middle part of the spiral body 2 is inwards provided with an annular groove 24 above the annular block 23, and the melt is buffered by the groove 24, so that the melt flow at each part entering the discharge channel 31 is ensured to be the same. The groove 24 and the top end of the spiral body 2 and the annular block 23 form arc transition, so that melt flows conveniently.
In this embodiment, a base 6 is arranged at the bottom of the spiral body 2, the adapter 4 is installed on the base 6, the upper end of the adapter penetrates through the base 6 and extends out of the spiral body 2, the bottom of the mold shell 1 is fixed on the base 6, and the base 6, the spiral body 2 and the mold shell 1 are utilized to form a bottom sealing shape, so that the melt can move upwards along the flow channel 11 conveniently. The plurality of feed channels 22 are circumferentially distributed on the spiral body 2, so that the melt can uniformly come out from the feed channels 2. The annular block 23 and the bottom end of the spiral body 2 are in circular arc transition, so that melt flows conveniently. The annular block 2 and the spiral body 2 are integrally formed, so that the stability of the whole structure is ensured. The outer side of the die ring 3 is provided with a first heater 7, and the outer side of the die shell is provided with a second heater 8 for heating the melt and keeping the fluidity of the melt.
The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are within the spirit of the invention.
Claims (10)
1. A blown film die head is characterized in that: comprises a mould shell, a spiral body, a mould ring, an adapter and an air pipe joint, wherein an air passage penetrating through the top of the spiral body is arranged in the spiral body along the axial direction of the spiral body, a plurality of discharging channels are arranged in the spiral body along the radial direction of the spiral body, the adapter is arranged at the bottom of the spiral body and is communicated with the feeding hole of the feeding channel, the shuttering is fixedly sleeved outside the spiral body and forms a flow passage with the lower end sealed with the spiral body, the spiral body is provided with an annular block above the discharge hole of the discharge channel, the distance between the annular block and the mould shell corresponding to the discharge hole is larger than the distance between the two sides of the annular block and the mould shell, the die ring fixing sleeve is arranged at the top end of the spiral body and positioned at the top of the formwork, a discharge channel is formed between the die ring and the spiral body, and the air pipe joint is fixed on the spiral body and communicated with the air passage.
2. The blown film die of claim 1, wherein: the distance between the annular block and the formwork is gradually reduced from the corresponding position of the discharge hole to two sides.
3. The blown film die of claim 1, wherein: and an annular groove is formed in the middle of the spiral body in the upper direction of the annular block.
4. The blown film die of claim 3, wherein: the groove and the top end of the spiral body and the annular block form circular arc transition.
5. The blown film die of any one of claims 1 to 4, wherein: the bottom of the spiral body is provided with a base, the adapter is installed on the base, the upper end of the adapter penetrates through the base and extends out of the spiral body, and the bottom of the formwork is fixed on the base.
6. The blown film die of any one of claims 1 to 4, wherein: a plurality of said feed channels are circumferentially distributed on said spiral body.
7. The blown film die of any one of claims 1 to 4, wherein: the annular block and the bottom end of the spiral body are in circular arc transition.
8. The blown film die of any one of claims 1 to 4, wherein: the annular block and the spiral body are integrally formed.
9. The blown film die of any one of claims 1 to 4, wherein: and a first heater is arranged on the outer side of the die ring.
10. The blown film die of any one of claims 1 to 4, wherein: and a second heater is arranged on the outer side of the formwork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210490304.5A CN114905720A (en) | 2022-05-07 | 2022-05-07 | Film blowing die head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210490304.5A CN114905720A (en) | 2022-05-07 | 2022-05-07 | Film blowing die head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114905720A true CN114905720A (en) | 2022-08-16 |
Family
ID=82767015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210490304.5A Pending CN114905720A (en) | 2022-05-07 | 2022-05-07 | Film blowing die head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114905720A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117124579A (en) * | 2023-09-07 | 2023-11-28 | 徐州赫博包装有限公司 | Film production blow molding machine for ultra-pure PE packaging bag |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2299708Y (en) * | 1997-04-24 | 1998-12-09 | 张更臣 | Plastic film mould |
| CN207747401U (en) * | 2017-11-24 | 2018-08-21 | 苏州金纬中空技术有限公司 | Storing type parison die for blow moulding machine |
| CN209158892U (en) * | 2018-10-16 | 2019-07-26 | 佛山市顺德区雄球塑料机械有限公司 | A kind of single layer extrusion die |
| CN210336841U (en) * | 2019-08-06 | 2020-04-17 | 潍坊华潍新材料科技有限公司 | Film blowing machine rotary die head suitable for starch biodegradable material |
| CN210590491U (en) * | 2019-09-02 | 2020-05-22 | 大连龙尧塑料机械有限公司 | Machine head suitable for water-soluble film material |
| CN114013016A (en) * | 2021-12-03 | 2022-02-08 | 锐励生物科技(杭州)有限公司 | Extrusion molding machine for density-reducing full-biodegradable film |
-
2022
- 2022-05-07 CN CN202210490304.5A patent/CN114905720A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2299708Y (en) * | 1997-04-24 | 1998-12-09 | 张更臣 | Plastic film mould |
| CN207747401U (en) * | 2017-11-24 | 2018-08-21 | 苏州金纬中空技术有限公司 | Storing type parison die for blow moulding machine |
| CN209158892U (en) * | 2018-10-16 | 2019-07-26 | 佛山市顺德区雄球塑料机械有限公司 | A kind of single layer extrusion die |
| CN210336841U (en) * | 2019-08-06 | 2020-04-17 | 潍坊华潍新材料科技有限公司 | Film blowing machine rotary die head suitable for starch biodegradable material |
| CN210590491U (en) * | 2019-09-02 | 2020-05-22 | 大连龙尧塑料机械有限公司 | Machine head suitable for water-soluble film material |
| CN114013016A (en) * | 2021-12-03 | 2022-02-08 | 锐励生物科技(杭州)有限公司 | Extrusion molding machine for density-reducing full-biodegradable film |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117124579A (en) * | 2023-09-07 | 2023-11-28 | 徐州赫博包装有限公司 | Film production blow molding machine for ultra-pure PE packaging bag |
| CN117124579B (en) * | 2023-09-07 | 2024-06-25 | 徐州赫博包装有限公司 | Film production blow molding machine for ultra-pure PE packaging bag |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |